JP6942326B2 - Nozzle type steam trap - Google Patents

Description

According to the present invention, in various factories and facilities that use steam as a heating source via a heat exchanger, drainage (condensed condensate of steam) generated in steam-using equipment and a steam transport piping system between these equipment is generated. The present invention relates to a nozzle-type steam trap capable of automatically and continuously discharging the steam trap to the outside of the system, and the present invention relates to a nozzle-type steam trap having a hole diameter adjusting mechanism and / or a fluid leakage prevention mechanism having both a nozzle hole diameter adjusting function and a cleaning function.

In various factories and facilities that use steam as a heating source via a heat exchanger, it is necessary to automatically discharge the drain generated in the steam-using equipment and the steam transportation piping system between these facilities to the outside of the system.

This is to ensure appropriate temperature conditions in the steam transport piping that connects these, including steam-using equipment such as the heat exchanger of the dryer and the heating kiln, and to ensure stable and safe operation of the factory. be. For example, if drain stays in a steam-using facility or a steam transportation piping system, the heating efficiency is lowered, the productivity of the facility is significantly lowered, and uneven heating due to drain droplets causes poor quality of the product. It interferes with the stable operation of the factory. In addition, the drain accumulated in the steam piping system forms a large mass while being swept away by the steam and collides with the bent part of the piping or the valve, or when it comes into contact with steam, it condenses at once and the steam volume becomes zero. It causes a steam hammer that the drain rushes to the place where the vacuum state is created locally and collides with it. When this steam hammer occurs, sudden pressure changes in the piping can damage the gaskets and flanges at the connections, as well as the valve itself, causing a large amount of steam and high-temperature drain to spurt out, resulting in a serious accident. There is sex.

Therefore, a large amount of steam straps are installed in the above factories and facilities, and conventionally, mechanical engineering mechanical steam traps (bucket type / float type), thermostatic steam traps (bimetal type / bellows type), and , Thermodynamic steam traps (disc type) have been used.

However, these mechanical steam traps have the following problems. The mechanical steam trap is a drain valve mechanism having a movable part, and when a certain amount of drain water is stored, the drain valve is drained by opening the drain valve, and then the drain valve is closed immediately. Therefore, due to this mechanism, a large amount of steam leakage due to operation delay or repeated operation cannot be avoided, and intermittent drainage of the mechanical steam trap is likely to cause damage to moving parts, and stable operation of steam-using equipment is possible. Is not guaranteed. Nevertheless, in the past, the problem of energy loss due to a large amount of steam leakage from mechanical steam traps has tended to be overlooked because there is a strong awareness of the need for drainage drainage, but in recent years, factory efficiency has improved. It has come to be reviewed from the viewpoint of global environmental conservation such as energy saving and CO _{2 reduction.}

In such a situation, there is increasing interest in various nozzle type steam traps such as an orifice nozzle type, a Venturi nozzle type, and a tunnel structure resistance tube type steam trap. These are called fluid engineering steam traps, and use a drainage mechanism in which water has a lower kinematic viscosity when passing through fine passages than steam, and water flows about 30 times as much as steam. , It has a structure without moving parts. Therefore, unlike the conventional steam trap having a movable part, continuous drainage with less steam leakage is realized, and the fuel consumption of the boiler is significantly reduced. In addition, the structure without moving parts has excellent durability and is easy to maintain and inspect. Furthermore, it is resistant to steam hammers and freezing, and has excellent stability and safety.

As such specific examples, for example, Patent Document 1 discloses an orifice nozzle type steam trap, and Patent Document 2 discloses a Venturi nozzle type steam trap. Although such a nozzle-type steam trap has the above-mentioned advantages, it has the following problems. Explaining with the Venturi nozzle type steam trap shown in FIG. 1, since the amount of drainage drainage depends on the hole diameter of the nozzle 3, the amount of drainage drainage is adjusted due to fluctuations in the operating pressure difference between the inlet and the outlet, and external factors and seasonal factors and There is a problem that the nozzle 3 needs to be replaced according to fluctuations in the amount of steam used due to the operating conditions of the steam-using equipment and the like. Further, a screen 6 for catching rust, dust, etc. in the drain before the drain passes through the nozzle 3 is provided in the strainer 5, but since the hole diameter of the nozzle 3 is small, the screen 6 has rust, dust, etc. There is a limit to capturing the nozzle 3, and there is also a problem that the nozzle 3 is likely to be clogged. Further, there is also a problem that the steam leakage cannot be sufficiently prevented only by the drainage mechanism in which the water of the fluid engineering steam trap flows about 30 times as much as the steam.

Patent Document 1 can move forward and backward in the axial direction provided in the hole of the orifice nozzle in order to adjust the drain drainage amount of the orifice nozzle and prevent clogging of the orifice nozzle due to rust or dust in the drain. The hole diameter of the orifice nozzle is adjusted by the various members, and clogging rust, dust, etc. are removed. However, this solution has a problem that there is a limit to the amount of drainage drainage and manpower is required. Moreover, the problem of reducing the amount of steam leakage has not been recognized.

Patent Document 2 relates to a typical Venturi nozzle type steam trap shown in FIG. 1, and inherently has a problem of adjusting the amount of drainage drainage, a problem of clogging such as rust and dust, and steam. The problem of leakage is also not recognized.

Patent Documents 3 and 4 disclose solutions to the problems of these nozzle-type steam traps.

In Patent Document 3, as shown in FIG. 2, a drain discharge port 3-2 for discharging drain to a drain water storage unit 9 provided in a steam trap and a drain discharge port 3-2 for discharging drain from the drain water storage unit 9 to the outside of the steam trap system. The amount of drainage drainage can be adjusted by rotating the height difference from the drainage outlet 11 outside the drainage system. The mechanism is simple, the steam trap can be miniaturized, and in addition to the drainage mechanism that the water of the fluid engineering steam trap flows about 30 times as much as the steam, the sealing of the nozzle 3 by the drain can prevent the steam leakage. There is a feature. However, even though the nozzle 3 is blocked by the drain, the amount of water stored in the drain is small, and the steam leakage prevention function may be insufficient. In addition, there is a great advantage that the amount of drainage drainage can be adjusted to some extent due to fluctuations in the operating pressure difference between the inlet and outlet by rotating the body 1 of the steam trap. In order to cope with a large change in the amount of drainage drainage due to a change in the amount of steam used due to a situation or the like, it is necessary to replace the nozzles 3 having different diameters of holes formed in the nozzle 3. Further, since the hole diameter of such a nozzle is small, it cannot be handled by drilling, and electric discharge machining may be required, which requires labor and is expensive, and the flatness of the shape inside the hole is deteriorated. The nozzle-type steam trap is characterized in that the mesh of the screen 6 provided in the strainer 5 is made finer, but since the hole diameter of the nozzle 3 is small, rust, dust, etc. are removed by the screen 6. There is a limit to capture, and it is difficult to completely prevent nozzle clogging.

Therefore, in Patent Document 4, in order to solve the above-mentioned problem of nozzle clogging, a nozzle whose cutting edge is processed into a bullet shape and a nozzle in which a groove is formed from a hole of the nozzle toward the outer periphery of the nozzle. However, it is difficult to process and there is a problem of productivity. Further, as in the case of the conventional nozzle, in order to cope with a large change in the amount of drainage drainage, it is necessary to replace the nozzles having different diameters of the holes formed in the nozzles, and the steam leakage prevention function may be insufficient.

On the other hand, Patent Documents 5 and 6 are steam traps that convert drain into steam and discharge it, and are the fluid engineering nozzle type steam traps that utilize the difference in the flow rates of steam and water passing through a minute passage. Although it is a fundamentally different method, it attempts to improve the steam trap using a nozzle. In addition, in this specification, all steam traps using a nozzle including such a steam trap are referred to as a nozzle type steam trap.

Patent Document 5 attempts to solve a problem caused by a small and short fluid discharge port of a nozzle of a fluid engineering nozzle type steam trap. That is, a steam generation nozzle is provided in which drain is stored in a large drain storage tube and a long hole for converting the drain into steam is provided in the drain storage tube, and a plurality of steam discharge holes and long holes are provided on the outlet side thereof. A steam discharge amount adjusting cap provided with a plug for closing the outlet is screwed in, and the steam discharge amount is controlled by rotating the steam discharge amount adjusting cap. Steam leakage is prevented by drainage, but like the conventional mechanical steam strap, a space for installing a large container called a drain storage tube is required, and it is necessary to respond to changes in the amount of drainage drainage, and steam discharge with manpower is required. There is a problem that the amount adjusting cap must be rotated frequently. Further, the hole diameter of the steam generating nozzle is large but long, and the problem of clogging due to rust, dust, etc. remains dependent on the screen in the conventional strainer. Further, in order to adjust the nozzle hole diameter in response to a large change in drainage amount, the nozzle for which the elongated hole is formed must be replaced.

In Patent Document 6, a steam trap that converts drain into steam and discharges it is connected to the drain storage tube of Patent Document 5, and a cyclone capable of separating dust and the like is connected to the drain outlet of the steam trap. The drain discharge capacity is controlled by providing a sensor in the drain storage tube that opens and closes the discharge valve of the cyclone according to the increase and decrease of the drain. In this case as well, steam leakage is prevented by drainage, but a larger space than in Patent Document 5 is required, the mechanism is complicated, and a large number of required steam traps have an economic problem. Further, the adjustment of the hole diameter of the nozzle and the clogging of the nozzle have the same problems as in Patent Document 5.

As described above, the steam trap using the nozzle is easy to process and adjust the hole diameter of the nozzle regardless of whether it is a fluid engineering nozzle type steam trap, and it is possible to prevent the nozzle from clogging and steam leakage. , Cheap and small nozzle steam traps have not yet been found.

Japanese Unexamined Patent Publication No. 2008-309290 U.S. Pat. No. 5,429,150 Japanese Patent No. 5694619 Japanese Patent No. 5833266 Japanese Patent No. 5561632 Japanese Patent No. 5745149

As described above, in the conventional various nozzle type steam traps, in order to control the amount of drainage, drilling or electric discharge machining is required to adjust the nozzle hole diameter, and labor is required to form a fine nozzle. In addition to being expensive, there is a problem that the flatness of the shape inside the hole is deteriorated in electric discharge machining. In addition, since the hole diameter of the nozzle is small, there is a problem of clogging of the nozzle due to rust, dust, etc. that are not captured by the screen. Further, not to mention the nozzle type steam trap of the mechanism in which the nozzle is not blocked by the drain, the nozzle type steam trap of the mechanism in which the nozzle is blocked by the drain also leaks steam when the amount of water stored in the drain is small. The prevention function may be insufficient.

The present invention has a nozzle that can easily process and adjust the hole diameter of the nozzle, automatically remove nozzle clogging due to rust, dust, etc. in the drain, and has a steam leakage prevention function at low cost. It is intended to provide a small nozzle type steam trap. In particular, the present invention provides a steam trap that solves the problems of hole diameter processing, hole diameter adjustment, clogging, and steam leakage related to a Venturi nozzle type steam trap.

The present inventors have found that the above problems can be solved by inserting a nozzle hole diameter adjusting mechanism into the nozzle hole of a nozzle-type steam trap, and have completed the present invention.

That is, the present invention is a nozzle-type steam trap including a nozzle hole diameter adjusting mechanism inserted into a nozzle hole in a steam trap provided with a nozzle. The nozzle hole diameter adjusting mechanism is not particularly limited as long as it can be inserted into the nozzle, but it may be a linear structure in consideration of the nozzle shape and the manufacture of the nozzle hole diameter adjusting mechanism. preferable. Therefore, the linear structure includes not only a cylindrical structure but also a spiral structure having a diameter passing through the hole of the nozzle, a zigzag structure, a topological structure, and the like.

Conventionally, the nozzle hole diameter of the nozzle type steam trap (Figs. 1 and 2) is due to fluctuations in the operating pressure difference between the inlet and outlet, external factors depending on the season, and fluctuations in the amount of steam used due to the operating conditions of steam-using equipment. In order to cope with changes in the amount of drainage drainage, those having a diameter in the range of about 0.1 to 4.4 mm have been used. Generally, the holes were formed by drilling or electric discharge machining, respectively, and nozzles having a hole diameter suitable for the situation were replaced, mounted and used. In particular, in the case of a fine hole diameter of about 0.4 mm or less, drilling is difficult and it was formed by electric discharge machining. There was a problem that the flow became irregular, which was not preferable in terms of drainage drainage and steam leakage.

Therefore, if the nozzle is provided with a mechanism capable of adjusting the hole diameter of the nozzle to a desired hole diameter, if a nozzle having a certain hole diameter is manufactured, nozzles corresponding to various hole diameters can be provided. In particular, when a nozzle having a hole diameter that requires electric discharge machining is required, if a nozzle having a hole diameter that can be formed by drilling is manufactured and a nozzle hole diameter adjusting mechanism is provided, the hole diameter that requires electric discharge machining, for example, the diameter. The nozzle has a hole diameter corresponding to about 0.4 mm or less. Therefore, it is possible to solve the above-mentioned problems related to nozzle hole processing.

The linear structure of the nozzle hole diameter adjusting mechanism is designed in various forms such as a cylindrical structure, a spiral structure, a zigzag structure, and a topological structure so that the linear structure of the nozzle hole diameter adjusting mechanism can be inserted into the nozzle hole according to the nozzle hole diameter. However, considering the shape of the nozzle and the manufacture of the nozzle hole diameter adjusting mechanism, it is rational to use a linear structure having a cylindrical structure. Further, since the nozzle hole diameter adjusting mechanism is manufactured according to the nozzle having a diameter in the range of about 0.1 to 4.4 mm, it is necessary to design the shape, the diameter, and the like suitable for each.

On the other hand, the nozzle hole diameter adjusting mechanism can be fixed, but if it is installed so that it can swing, the nozzle hole diameter adjusting mechanism swings as the drain is discharged, causing rust and dust that cannot be captured by the screen. It is also possible to develop a clogging prevention function that can prevent such things from covering the holes of the nozzle.

As described above, the nozzle hole diameter adjusting mechanism provided in the nozzle type steam trap of the present invention is not particularly limited as long as it is a linear structure inserted into the nozzle hole, but is shown in FIGS. 1 and 2. In order to apply it to a nozzle-type steam trap, neither the nozzle hole diameter adjusting function nor the clogging prevention function can be exhibited unless the nozzle hole diameter adjusting mechanism holds a linear structure in the nozzle hole. Therefore, the nozzle hole diameter adjusting mechanism provided in the nozzle type steam trap of the present invention is characterized by having the following configuration.

When the nozzle hole diameter adjusting mechanism is composed of only a linear structure, the linear structure can be held in the nozzle hole if it has a length corresponding to the size and shape of the steam trap. Is. In this case, since the nozzle hole diameter adjusting mechanism can be fixed and can be swung, both the nozzle hole diameter adjusting function and the clogging prevention function can be exhibited.

However, in order for the nozzle hole diameter adjusting mechanism to be reliably held in the nozzle hole, a locking structure for holding the linear structure in the nozzle hole is provided as a linear structure constituting the nozzle hole diameter adjusting mechanism. It is preferable to attach it to at least one end of the body, and if it is attached to both ends thereof, the linear structure of the nozzle hole diameter adjusting mechanism can be more reliably held in the nozzle hole. However, when this locking structure is attached only to one end of the linear structure constituting the nozzle hole diameter adjusting mechanism, the linear structure constituting the nozzle hole diameter adjusting mechanism may be formed by the configuration of the nozzle type steam trap. The position is selected so that it is held in the hole of the nozzle. Further, depending on the configuration of the locking structure, it is possible to provide a nozzle hole diameter adjusting mechanism to which various functions are added.

The locking structure attached to the nozzle hole diameter adjusting mechanism of the present invention only needs to be able to hold the linear structure constituting the nozzle hole diameter adjusting mechanism in the nozzle hole, and the material and shape are not limited. No. However, the material is preferably one that is not corroded by the drain, is not easily broken by shaking, and can be processed into various shapes, and stainless steel, plastic, ceramic, or the like is used. On the other hand, the shape is characterized by being various locking structures as shown below.

First, the locking structure of the present invention is a bent structure such as an L-shape, a T-shape, a circular shape, a polygonal shape, a star shape, or a spiral shape obtained by processing a linear object thinner than the hole of the nozzle. It is a feature. The bent structure is not particularly limited as long as the linear structure constituting the nozzle hole diameter adjusting mechanism is processed so as not to pass through the nozzle hole. It suffices if it is attached to at least one end of the linear structure constituting the nozzle hole diameter adjusting mechanism, but if it is attached to both ends, the linear structure constituting the nozzle hole diameter adjusting mechanism is surely attached to the nozzle hole. It is preferable from the viewpoint of holding. Further, by adjusting the length of the linear structure constituting the nozzle hole diameter adjusting mechanism, it can be fixed or swingable.

Secondly, the locking structure of the present invention is a spherical body, a columnar body, or a cone so that the linear structure constituting the nozzle hole diameter adjusting mechanism cannot pass through the nozzle hole without blocking the nozzle hole. It is characterized by being a massive structure larger than a nozzle hole such as a shaped body or a polyhedron. Like the bent structure, this massive structure may be attached to at least one end of the linear structure constituting the nozzle hole diameter adjusting mechanism, but the linear structure more reliably constitutes the nozzle hole diameter adjusting mechanism. May be attached to both ends, or a massive structure may be attached to one end and a bent structure may be attached to the other end. Further, by adjusting the length of the linear structure constituting the nozzle hole diameter adjusting mechanism, it can be fixed or swingable. However, in the case of a massive structure, it is necessary to attach it to the end of the linear structure constituting the nozzle hole diameter adjusting mechanism as a locking structure at a position where the nozzle hole is not closed.

Thirdly, the locking structure of the present invention is characterized by being an elastic structure. In the case of this elastic structure, it is preferable that it is a coiled compression spring or a tension spring made of stainless steel or plastic so that drainage can be discharged. This elastic structure is a linear structure that constitutes a nozzle hole diameter adjusting mechanism by the action of the expansion force of a compressed spring or the contraction force of an extended spring using the inner wall of the steam trap body or a stopper arranged therein. It is attached to at least one end of the linear structure constituting the nozzle hole diameter adjusting mechanism so that the body is held in the hole of the nozzle. Depending on the strength of the restoring force of the spring, the linear structure constituting the nozzle hole diameter adjusting mechanism can be fixed or can be swung. In order to more reliably hold the linear structure constituting the nozzle hole diameter adjusting mechanism in the nozzle hole, elastic structures may be attached to both ends, but the elastic structure is bent at one end and the other end. A structure or a massive structure may be added.

Fourth, the locking structure of the present invention is characterized by being a massive weight structure. This massive weight structure is attached to one end of the linear structure constituting the nozzle hole diameter adjusting mechanism on the drain outlet side so as to close the nozzle hole, and in addition to the nozzle hole diameter adjusting function and the clogging prevention function. , A nozzle hole diameter adjusting mechanism provided with a steam leakage prevention function can be provided. In the nozzle-type steam trap shown in FIG. 1, the massive weight structure seals the nozzle to prevent steam leakage. In the nozzle-type steam trap shown in FIG. 2, since the nozzle is blocked by the drain and the massive weight structure, the steam leakage prevention ability can be further improved. Therefore, the massive weight structure may have the same material and shape as the above-mentioned massive structure, but it can be adjusted according to the adjustment of the drainage drainage amount and the fluctuation of the steam consumption amount according to the operating environment and operating conditions of the steam-using equipment. Must be set to weight. This massive weight structure may also be attached to at least one end of the linear structure constituting the nozzle hole diameter adjusting mechanism, but the linear structure constituting the nozzle hole diameter adjusting mechanism is more reliably attached to the nozzle hole. In order to hold the nozzle, it is preferable to use a cylindrical swingable massive weight structure that fits the flange of the nozzle. Further, the bent structure, the massive structure, and the elastic structure may be attached to the other end of the linear structure constituting the nozzle hole diameter adjusting mechanism, but the linear structure constituting the nozzle hole diameter adjusting mechanism may be attached. The length of the structure is adjusted, and each of these structures needs to be attached so that the linear structure constituting the nozzle hole diameter adjusting mechanism can be swung.

Fifth, in the locking structure of the present invention, the above-mentioned massive weight structure is attached to one end of the linear structure constituting the nozzle hole diameter adjusting mechanism on the drain outlet side, and further, the massive weight structure is further attached. It is characterized in that it is a structure in which the above elastic structure is attached. As the massive weight structure and the elastic structure, the above-mentioned structures can be used in terms of shape, material, function, etc., and the above-mentioned bent structure, The above-mentioned massive structure and the above-mentioned elastic structure may be attached so as to be swingable. The locking structure formed by sequentially connecting the massive weight structure and the elastic structure can further enhance the vapor leakage prevention function of the massive weight structure. However, in this case, a torsion spring can be used as the elastic structure. In this case, the torsion spring is moved up and down at an appropriate position on the inner wall of the steam trap body, that is, the massive weight structure is moved up and down by the torsion spring, and the linear structure constituting the nozzle hole diameter adjusting mechanism is the nozzle. It is characterized in that the hole is provided at a swinging position.

According to the present invention, since the nozzle hole diameter can be adjusted without requiring fine processing of the nozzle hole diameter, it is possible to easily process the nozzle and manufacture an inexpensive nozzle-type steam trap. Furthermore, by swinging the linear structure that constitutes the nozzle hole diameter adjustment mechanism, it is possible to automatically remove nozzle clogging due to rust, dust, etc. in the drain, and it also has a steam leakage prevention function. A small nozzle type steam trap can be provided. In particular, the present invention provides a steam trap that solves the problems of hole diameter processing, hole diameter adjustment, clogging, and steam leakage related to a Venturi nozzle type steam trap.

It is sectional drawing of the conventional typical Venturi nozzle type steam trap. It is sectional drawing of the Venturi nozzle type steam trap provided with the drain displacement adjustment mechanism. In the Venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the Venturi nozzle type steam trap characterized in that the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle is a linear structure. It is a cross-sectional schematic diagram of. In the Venturi nozzle type steam trap according to the embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle has an L-shaped bent structure of a linear object as a locking structure. It is sectional drawing of the Venturi nozzle type steam trap characterized in that one end of the linear structure on the drain outlet side is attached and swingable. In the Venturi nozzle type steam trap according to the embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle has an L-shaped bent structure of a linear object as a locking structure. It is sectional drawing of the Venturi nozzle type steam trap which is attached to both ends of a linear structure and is swingable. In the Venturi nozzle type steam trap according to the embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle closes the nozzle with a lump structure of a square pillar as a locking structure. It is sectional drawing of the Venturi nozzle type steam trap characterized by being attached to both ends of a linear structure without having to swing, and is swingable. In the Venturi nozzle type steam trap according to the embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle has an L-shaped bent structure of a linear object as a locking structure. It is sectional drawing of the Venturi nozzle type steam trap which is attached to both ends of a linear structure and is fixed to a nozzle. In the Venturi nozzle type steam trap according to the embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle has an L-shaped bent structure of a linear object as a locking structure. It is sectional drawing of the Venturi nozzle type steam trap characterized by being attached to both ends of a linear structure and being fixed to the inner wall of a steam trap itself. In the Venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle has an elastic structure as a locking structure and a linear structure on the drain outlet side. It is sectional drawing of the Venturi nozzle type steam trap which is attached to one end of a body, is held by the elastic structure and the inner wall of a steam trap itself, and can swing. In the Ventury nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the Ventury nozzle has an elastic structure as a locking structure and a linear structure on the drain outlet side. At one end of the body, an L-shaped bent structure is attached to the other end of the linear structure on the drain inlet side, and is fixed by the elastic structure, the bent structure, and the inner wall of the steam trap itself. It is sectional drawing of the characteristic Ventury nozzle type steam trap. In the Venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle has an elastic structure at both ends of the linear structure as a locking structure. FIG. 5 is a schematic cross-sectional view of a Venturi nozzle type steam trap, which is attached and is held by an elastic structure and an inner wall of the steam trap itself and can swing. In the Venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle has a spherical massive weight structure as a locking structure on the drain outlet side. It is sectional drawing of the Venturi nozzle type steam trap which is attached to one end of a linear structure and is swingable. In the Venturi nozzle type steam trap according to the embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle has a cylindrical massive weight structure as a locking structure on the drain outlet side. It is a cross-sectional schematic diagram of a Venturi nozzle type steam trap which is attached to one end of the linear structure of the above and is swingable. In the venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle has a cylindrical massive weight structure as a locking structure on the drain outlet side. An L-shaped bent structure is attached to one end of the linear structure of the above, and is attached to the other end of the linear structure on the drain inlet side, and is swingable. It is a figure. In the Venturi nozzle type steam trap according to the embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle fits the flange of the nozzle on the drain outlet side as a locking structure. FIG. 5 is a schematic cross-sectional view of a Venturi nozzle type steam trap characterized in that a cylindrical massive weight structure is attached to one end of the linear structure and can swing. In the Venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, a nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle is provided at one end of a linear structure on the drain outlet side as a locking structure. It is sectional drawing of the Venturi nozzle type steam trap characterized in that the massive weight structure and the elastic structure are connected in order and can swing. In the Venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, a nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle is provided at one end of a linear structure on the drain outlet side as a locking structure. The massive weight structure and the elastic structure are connected in that order and can swing, and the torsion spring forms a nozzle hole diameter adjusting mechanism by moving the massive weight structure up and down on the inner wall of the steam trap body. It is sectional drawing of the Venturi nozzle type steam trap characterized in that the linear structure is provided at a position which can swing in a hole of a nozzle. In the Venturi nozzle type steam trap shown in FIG. 1 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle is a linear structure, and a line constituting the nozzle hole diameter adjusting mechanism. FIG. 5 is a schematic cross-sectional view of a Venturi nozzle type steam trap characterized in that a stopper capable of holding a shaped structure in a nozzle hole is provided on an inner wall of a steam strap main body. In the Venturi nozzle type steam trap shown in FIG. 1 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle has an L-shaped bent structure of a linear object as a locking structure. It is sectional drawing of the Venturi nozzle type steam trap which is attached to both ends of a linear structure and is swingable. In the Venturi nozzle type steam trap shown in FIG. 1 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle is a locking structure in which a square pillar massive structure is a linear structure. It is a cross-sectional schematic diagram of the Venturi nozzle type steam trap which is attached to both ends and is fixed. In the Venturi nozzle type steam trap shown in FIG. 1 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle has an elastic structure as a locking structure and a linear structure on the drain outlet side. FIG. 5 is a schematic cross-sectional view of a Venturi nozzle type steam trap, which is attached to one end of the body, is held by an elastic structure and a stopper provided on the inner wall of the steam trap main body, and is swingable. In the Venturi nozzle type steam trap shown in FIG. 1 according to an embodiment of the present invention, a nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle is provided at one end of a linear structure on the drain outlet side as a locking structure. It is sectional drawing of the Venturi nozzle type steam trap characterized in that the massive weight structure and the elastic structure are connected in order and can swing. In the Venturi nozzle type steam trap shown in FIG. 1 according to an embodiment of the present invention, a nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle is provided at one end of a linear structure on the drain outlet side as a locking structure. The massive weight structure and the elastic structure are connected in that order and can swing, and the torsion spring forms a nozzle hole diameter adjusting mechanism by moving the massive weight structure up and down on the inner wall of the steam trap body. It is a cross-sectional schematic diagram of the Venturi nozzle type steam trap characterized in that the linear structure is provided at a position where it can swing in the hole of the nozzle.

Hereinafter, the present invention will be described with respect to the Venturi nozzle type steam trap by using a schematic cross-sectional view in which parts and members unnecessary for the description of the present invention are omitted. The present invention will be specifically described by taking one embodiment shown in the drawings as a representative example, but the present invention is not limited thereto, and various modifications are made without departing from the gist of the present invention. It is possible and limited only by the technical ideas described in the claims.

An embodiment of the present invention is shown in FIG. In the Venturi nozzle type steam trap of the type shown in FIG. 2, the Venturi nozzle type steam trap is characterized in that the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle 3 is only the linear structure A. Depending on the size of the inside of the steam trap, the linear structure A needs the minimum necessary length to be held in the hole of the nozzle 3. As is clear from the figure, such a nozzle hole diameter adjusting mechanism has a function of adjusting the hole diameter and preventing clogging of the nozzle by swinging. The same applies hereinafter.

An embodiment of the present invention is shown in FIG. In the Venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle 3 has an L-shaped bent structure B-1 of a linear object as a locking structure on the drain outlet side. It is a Venturi nozzle type steam trap that is attached to one end of the linear structure of the above and is capable of swinging. With this L-shaped bent structure B-1, the linear structure A constituting the nozzle hole diameter adjusting mechanism can be held in the hole of the nozzle 3 regardless of the internal size of the steam trap, and the nozzle hole diameter can be adjusted. The length of the linear structure A constituting the mechanism can be shortened.

An embodiment of the present invention is shown in FIG. In the Venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle 3 is an L-shaped bent structure B-1 and B-2 of a linear object as a locking structure. Is a Venturi nozzle type steam trap, which is provided at both ends of the linear structure A and is swingable. The L-shaped bent structures B-1 and B-2 are attached to both ends of the linear structure A constituting the nozzle hole diameter adjusting mechanism, so that the linear structure A constituting the nozzle hole diameter adjusting mechanism is formed. It is securely held in the hole of the nozzle 3.

An embodiment of the present invention is shown in FIG. In the Venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle 3 is a locking structure, and the square pillar massive structures C-1 and C-2 use the nozzle 3 as a locking structure. It is a Venturi nozzle type steam trap that is attached to both ends of the linear structure A without being blocked and can swing. Similar to the bent structure, the linear structure A constituting the nozzle hole diameter adjusting mechanism is provided at both ends in order to be reliably held in the holes of the nozzle 3, but only the upper end may be used. Further, one end may be a massive structure and the other end may be a bent structure.

An embodiment of the present invention is shown in FIG. In the Venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle 3 is an L-shaped bent structure B-3 and B-4 of a linear object as a locking structure. Is a Venturi nozzle type steam trap characterized in that is attached to both ends of the linear structure A and fixed to the nozzle 3. This is an example in which the nozzle hole diameter adjusting mechanism is fixed to the nozzle 3 by adjusting the length of the linear structure A constituting the nozzle hole diameter adjusting mechanism. Here, an example is shown in which the locking structures are bent structures B-3 and B-4 at both ends, but even if both ends are massive structures, one end is a bent structure and the other end is a bent structure. It may be a massive structure.

An embodiment of the present invention is shown in FIG. In the Venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle 3 is an L-shaped bent structure B-5 and B-6 of a linear object as a locking structure. Is a Venturi nozzle type steam trap characterized in that is attached to both ends of the linear structure A and fixed to the inner wall of the body 1 of the steam trap. Here, an example in which the locking structures are the bent structures B-5 and B-6 is shown, but the bent structure is not always necessary, and may be a massive structure or an elastic structure. When an elastic structure is used, the linear structure constituting the nozzle hole diameter adjusting mechanism can be fixed or swung according to the strength of the restoring force of the spring.

An embodiment of the present invention is shown in FIG. In the Venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle 3 is a locking structure in which the elastic structure D-1 is a linear structure A on the drain outlet side. It is a Venturi nozzle type steam trap attached to one end, held by an elastic structure D-1 and an inner wall of a body 1 of a steam trap, and swingable. In this case, the elastic structure utilizes the expansion force of the coiled compression spring, and the linear structure constituting the nozzle hole diameter adjusting mechanism can be fixed according to the strength of the restoring force of the spring.

An embodiment of the present invention is shown in FIG. In the type of Ventury nozzle type steam trap shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the Ventury nozzle 3 is a locking structure in which the elastic structure D-2 is a linear structure A on the drain outlet side. At one end, an L-shaped bent structure B-7 is attached to the other end of the linear structure A on the drain inlet side, and the elastic structure D-2, the bent structure B-7, and the body of the steam trap are attached. It is a venture nozzle type steam trap characterized by being held by the inner wall of No. 1 and swingable. In this case, the elastic structure utilizes the contraction force of the coil-shaped contraction spring, and the linear structure constituting the nozzle hole diameter adjusting mechanism can be fixed according to the strength of the restoring force of the spring. Here, an example in which the locking structure is the bent structure B-7 is shown, but instead of the bent structure, a massive structure may be added so as not to block the nozzle hole.

An embodiment of the present invention is shown in FIG. In the Venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle 3 has an elastic structure D-3 attached to both ends of the linear structure A as a locking structure. The Venturi nozzle type steam trap is characterized in that it is held by the elastic structure D-3 and the inner wall of the body 1 of the steam trap and can swing. In this case, the elastic structure utilizes the contraction force of the coil-shaped contraction spring, and the linear structure constituting the nozzle hole diameter adjusting mechanism can be fixed according to the strength of the restoring force of the spring.

An embodiment of the present invention is shown in FIG. In the Venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle 3 has a spherical massive weight structure E-1 as a locking structure and a linear structure on the drain outlet side. It is a Venturi nozzle type steam trap that is attached to one end of the body A and is swingable. Such a massive weight structure E-1 is not limited as long as it has a shape capable of closing the hole of the nozzle 3, but it closes the nozzle 3 together with the drain accumulated in the water storage portion 9 to prevent steam leakage. It needs to be adjusted to an effective weight. The nozzle hole diameter adjusting mechanism provided with the massive weight structure has a steam leakage prevention function in addition to the hole diameter adjusting function and the clogging prevention function. The same applies hereinafter.

An embodiment of the present invention is shown in FIG. In the Venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle 3 has a cylindrical massive weight structure E-2 as a locking structure linearly on the drain outlet side. It is a Venturi nozzle type steam trap that is attached to one end of the structure A and is swingable. Compared with FIG. 12, this is an example in which the nozzle 3 is closed together with the drain collected in the water storage unit 9 to adjust the shape and weight to enhance the effect of preventing steam leakage.

An embodiment of the present invention is shown in FIG. In the type of Ventury nozzle type steam trap shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the Ventury nozzle 3 has a cylindrical massive weight structure E-3 as a locking structure linearly on the drain outlet side. A venture nozzle type steam trap characterized in that an L-shaped bent structure B-8 is attached to one end of the structure A and is attached to the other end of the linear structure A on the drain inlet side so that it can swing. be. The bent structure B-8 is provided to securely hold the linear structure constituting the nozzle hole diameter adjusting mechanism in the hole of the nozzle 3, and can swing without blocking the nozzle 3. As described above, a massive structure may be used. Further, a massive weight structure or an elastic structure of a coiled tension spring that does not block the hole of the nozzle may be added to hold the linear structure constituting the nozzle hole diameter adjusting mechanism to enhance the effect of preventing steam leakage. However, the weight and restoring force must be such that the linear structure can swing.

An embodiment of the present invention is shown in FIG. In the Venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle 3 has a cylindrical massive weight structure in which the flange of the nozzle on the drain outlet side is fitted as a locking structure. The Venturi nozzle type steam trap is characterized in that the body E-4 is attached to one end of the linear structure A and can swing. A bent structure or a massive structure that does not block the holes of the nozzle 3 may be attached to the other end of the linear structure A so that the nozzle hole diameter adjusting mechanism does not fall off. Further, even if a massive weight structure or an elastic structure of a coiled tension spring that does not block the hole of the nozzle 3 is attached to hold the linear structure constituting the nozzle hole diameter adjusting mechanism, the effect of preventing steam leakage is enhanced. Good, but the linear structure must be heavy and restoring enough to swing.

An embodiment of the present invention is shown in FIG. In the type of Ventury nozzle type steam trap shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the Ventury nozzle 3 serves as a locking structure at one end of the linear structure A on the drain outlet side. -5 and the elastic structure D-5 are connected in this order, and are held by the elastic structure D-5 and the inner wall of the body 1 of the steam trap, and are swingable. Is. Along with the drain accumulated in the water storage unit 9, the expansion force of the coiled compression spring and the action of the weight prevent steam leakage, but this action needs to be adjusted according to the operating environment and conditions of the steam-using equipment.

An embodiment of the present invention is shown in FIG. In the type of Ventury nozzle type steam trap shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the Ventury nozzle 3 serves as a locking structure at one end of the linear structure A on the drain outlet side. -6 and elastic structure D-6 are connected in that order and can swing, and the torsion spring D-6 is on the inner wall of the body 1 of the steam trap, and the massive weight structure D-6 is up and down. It is a venture nozzle type steam trap characterized in that the linear structure A is provided at a position where it can move and swing in the hole of the nozzle 3.

An embodiment of the present invention is shown in FIG. In the Venturi nozzle type steam trap of the type shown in FIG. 1, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle 3 is a linear structure A, and the linear structure A can be held in the hole of the nozzle. It is a Venturi nozzle type steam trap characterized by having stoppers 13-1 and 13-2. Here, the stoppers are provided at two places, but one of them can be used. In this case, a bent structure is provided at one end of the linear structure constituting the nozzle hole diameter adjusting mechanism on the opposite side to the stopper. Alternatively, a massive structure that does not block the nozzle may be attached.

An embodiment of the present invention is shown in FIG. In the Venturi nozzle type steam trap of the type shown in FIG. 1, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle 3 is an L-shaped bent structure B-1 and B-4 of a linear object as a locking structure. Is a Venturi nozzle type steam trap, which is provided at both ends of the linear structure A and is swingable. By adjusting the length of the linear structure A, the nozzle hole diameter adjusting mechanism can be fixed to the nozzle 3. Further, instead of the bent structure, a massive structure may be added so as not to block the nozzle 3.

An embodiment of the present invention is shown in FIG. In the Venturi nozzle type steam trap of the type shown in FIG. 1, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle 3 has a linear structure in which the square pillar massive structures C-3 and C-4 are linear structures as locking structures. It is sectional drawing of the Venturi nozzle type steam trap which is attached and fixed to both ends of the body A.

An embodiment of the present invention is shown in FIG. In the Venturi nozzle type steam trap of the type shown in FIG. 1, the nozzle hole diameter adjusting mechanism inserted into the hole of the Venturi nozzle 3 is a locking structure in which the elastic structure D-1 is a linear structure A on the drain outlet side. It is a Venturi nozzle type steam trap attached to one end, held by an elastic structure D-1 and a stopper 13-3 provided on the inner wall of the body 1 of the steam trap, and is swingable. .. It is also possible to increase the expansion force of the coiled compression spring and fix the linear structure constituting the nozzle hole diameter adjusting mechanism to the hole of the nozzle 3.

An embodiment of the present invention is shown in FIG. In the type of Ventury nozzle type steam trap shown in FIG. 1, the nozzle hole diameter adjusting mechanism inserted into the hole of the Ventury nozzle 3 serves as a locking structure at one end of the linear structure A on the drain outlet side. -5 and the elastic structure D-5 are connected in this order, and are held by the elastic structure D-5 and the stopper 13-4 provided on the inner wall of the body 1 of the steam trap so that they can swing. It is a characteristic Ventury nozzle type steam trap. The expansion force of the coiled compression spring and the action of the weight prevent steam leakage, but this action needs to be adjusted according to the operating environment and conditions of the steam-using equipment.

An embodiment of the present invention is shown in FIG. In the type of Ventury nozzle type steam trap shown in FIG. 1, the nozzle hole diameter adjusting mechanism inserted into the hole of the Ventury nozzle 3 serves as a locking structure at one end of the linear structure A on the drain outlet side. -6 and elastic structure D-6 are connected in that order and can swing, and the torsion spring D-6 is on the inner wall of the body 1 of the steam trap, and the massive weight structure E-6 is up and down. It is a venture nozzle type steam trap characterized in that the linear structure A is provided at a position where it can move and swing in a hole of a nozzle. The restoring force of the torsion spring D-6 prevents steam leakage, but this action needs to be adjusted according to the operating environment and conditions of the steam-using equipment.

The nozzle hole diameter adjusting mechanism in the above embodiment is made of stainless steel in consideration of corrosiveness to drainage, workability for manufacturing nozzle hole diameter adjusting mechanisms of various shapes, weight for acting as a weight, and the like. It is preferable to manufacture with, but it may be manufactured with plastic or ceramic.

The present invention is a nozzle-type steam trap provided with a nozzle hole diameter adjusting mechanism. A nozzle is a pipe-shaped mechanical component used to determine the flow direction of a fluid such as gas or liquid, and is a pipe-shaped mechanical component of a flowing substance. It is widely used to control the characteristics of a fluid such as flow rate, flow velocity, direction, and pressure. In general, the structure is such that the circular cross-sectional area is reduced to eject the fluid at high speed. Specifically, the spout of a fire extinguishing hose, the spout of a Pelton wheel, and the steam jet of a steam turbine. It is used for outlets, fuel injection ports of compression ignition engines, etc. Therefore, the nozzle hole diameter adjusting mechanism provided in the nozzle-type steam trap of the present invention can be widely used in equipment in which such a nozzle is used.

1 Body 2 Packing 3 Venturi Nozzle
3-1 Venturi nozzle drain inlet 3-2 Venturi nozzle drain outlet 4 End cap
5 strainer
6 Screen with support
7 Strainer end cap
8 Ball valve 9 Drain water storage part 10 Drain inflow port 11 Drain system outside discharge port 12 Union 13 Stopper 13-1 First stopper 13-2 Second stopper 13-3 Third stopper 13-4 Fourth stopper A Linear structure B-1 First bent structure B-2 Second bent structure B-3 Third bent structure B-4 Fourth bent structure B-5 Fifth bent structure B-6 6th bent structure B-7 7th bent structure B-8 8th bent structure C-1 1st lump structure C-2 2nd lump structure C-3 3rd C-4 4th massive structure D-1 1st elastic structure D-2 2nd elastic structure D-3 3rd elastic structure D-4 4th elastic structure D -5 Fifth elastic structure D-6 Sixth elastic structure E-1 First massive weight structure E-2 Second massive weight structure E-3 Third massive weight structure E-4 Fourth lump weight structure E-5 Fifth lump weight structure E-6 Sixth lump weight structure

Claims (3)

In a steam trap equipped with a nozzle, a nozzle hole diameter adjusting mechanism inserted into the hole of the nozzle is provided .
The diameter of the nozzle hole is larger than 0.4 mm.
The nozzle hole diameter adjusting mechanism includes a linear structure that is swingably maintained in an inserted state in the nozzle hole.
The nozzle hole and the linear structure are designed so that the opening region of the nozzle hole with the linear structure inserted corresponds to an opening hole having a desired dimension having a diameter of 0.4 mm or less. Nozzle type steam trap characterized by that. The nozzle hole diameter adjusting mechanism further includes a locking structure in a form in which the linear structure cannot pass through the nozzle hole.
The nozzle-type steam trap according to claim 1, wherein the nozzle hole diameter adjusting mechanism is configured to have the linear structure and the locking structure by bending a linear object. The nozzle-type steam trap according to claim 1 or 2, wherein the nozzle hole is formed by drilling.

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