JP4719733B2 - Gas stopper - Google Patents

Description

  According to the present invention, in a gas stopper, particularly a gas stopper installed outdoors, a waterproof packing is interposed between the gas stopper body and the operation handle in order to prevent rainwater or the like from entering the gas stopper body. It relates to a gas stopper.

  Generally, the gas plug main body (31) and the operation handle (2) of the gas plug for the gas meter are made of cast iron, and as shown in FIG. 4, the central portion of the gas flow path (31a) inserted through the gas plug main body (31). In addition, in the drawing, a thread accommodating portion (30) that opens upward is formed, and in the thread accommodating portion (30), a truncated cone-shaped thread (3) that can be rotated by operating the operation handle (2). ) Is housed.

  A cylindrical part (33) is extended above the thread accommodating part (30), and the upper surface of the thread (3) is rotated relative to the engaging part (22) of the operation handle (2). An operation shaft (32) for rotating the screw (3) while being engaged in the blocking state is provided. Further, the gas passage hole (3a) passes through the thread (3), and as the operation handle (2) rotates, the gas passage hole (3a) of the thread (3) as shown in FIG. ) And the gas flow path (31a) of the gas plug body (31) are in a fully open state, and from this state, it is rotated between a fully closed state in which the screw (3) is rotated 90 degrees. It has become.

A presser spring (35) is accommodated on the upper surface of the thread (3) in the operation shaft (32), and when the operation handle (2) is attached to the cylindrical portion (33) of the gas plug main body (31). The presser spring (35) is compressed between the upper surface of the screw (3) and the back surface of the operation handle (2), and the screw (3) is moved by the biasing force of the presser spring (35). 30) Housed in a state of being pushed inside.
Since the gas stopper for the gas meter is installed outdoors, it is necessary to prevent rainwater from entering the gas stopper body (31). For this reason, the waterproof packing (4) is interposed between the cylindrical portion (33) and the back surface of the operation handle (2).

The waterproof packing (4) shown in the drawing is an annular body made of a synthetic rubber having a substantially C-shaped cross section that opens outwardly, and an annular protrusion protruding from the outer peripheral end of the open portion of the cylindrical portion (33). It is tightly housed in a storage groove (36) provided on the inner side of the part (34), and is in watertight contact with the back surface of the operation handle (2).
In this case, the gap between the open end surface of the cylindrical portion (33) and the back surface of the operation handle (2) is sealed in the circumferential direction by the waterproof packing (4), and the gas plug main body (31) is sealed. Infiltration of water such as rainwater is prevented. By preventing water from entering the gas plug main body (31), it is structured to prevent the occurrence of rust on the sliding surfaces of the thread housing part (30) and the thread (3).
JP 2000-329251 A JP 2005-291308 A

  The gas plug main body (31) and the operation handle (2) of the gas plug installed outdoors are heavy because both are made of cast iron. Therefore, if it is installed near the main road or railway due to vibration during transportation, the operation handle (2) rattles due to the vibration, and the operation handle (2) and the gas plug body (31) There is an inconvenience that the operation handle (2) and the gas stopper main body (31) are damaged by the collision and rubbing with each other. Further, since the operation handle (2) is urged by the presser spring (35), when it resonates, the vibration is amplified, and the parts such as the stopper pin (23) attached thereto are loosened. Sometimes it ends up.

  In the case shown in FIG. 4, a waterproof packing (4) is interposed between the operation handle (2) and the gas plug body (31). The waterproof packing (4) is crushed by the vibration. It is difficult to prevent collision between the back surface of the operation handle (2) and the cylindrical portion (33) of the gas plug main body (31), and the conventional waterproof packing (4) can be used with the operation handle (2). It is difficult to function as a cushioning material between the gas stopper main body (31) and the gas stopper main body (31).

  Therefore, even if the operation handle (2) and the gas plug main body (31) vibrate, the back surface of the operation handle (2) hits the annular convex portion (34) of the cylindrical portion (33) of the gas plug main body (31). It is conceivable to set a large gap (S) between the annular convex portion (34) and the corresponding back surface of the operation handle (2) so as not to rub against each other. However, when the gap (S) is set large, when high water pressure water is jetted toward the gap (S), the water exceeds the waterproof packing (4) and enters the gas plug body (31). There is a risk of intrusion.

  When the watertightness and airtightness of the waterproof packing (4) are increased so that water intrusion can be reliably prevented, the waterproof packing (4) is connected to the cylindrical part (33) of the gas plug body (31) and the operation handle (2). Between them, the frictional force between them increases, and the operability of the operation handle (2) deteriorates. If the airtightness inside the gas plug body (31) becomes too high, the internal pressure fluctuates due to changes in the outside air temperature, and a force greater than the urging force of the presser spring (35) acts on the spring (3). The thread (3) may bite into the thread housing part (30) and the thread (3) cannot be rotated.

  According to the present invention, a cylindrical portion is continuously provided at an open end of a gas plug main body of the gas plug body, and an operation handle for rotating the pipe accommodated in the gas cylinder housing portion includes the cylindrical portion. In a gas stopper in which a waterproof packing is interposed between the cylindrical portion and the back surface of the operation handle, vibration transmitted to the gas stopper during transportation or installation location is controlled. An object is to prevent adverse effects on the handle and the gas plug body and to ensure stable waterproof performance at all times.

The solving means of the present invention taken in order to solve the above-mentioned problem is as follows: `` A protective ring is interposed between the cylindrical portion and the back surface of the operation handle, located outside the waterproof packing,
The protection ring includes an annular cylindrical portion that is fitted on the outer peripheral end of the open portion of the cylindrical portion and the outer peripheral end of the mounting portion of the operation handle facing the cylindrical ring, and projects inwardly from the annular cylindrical portion and the opening. It is comprised from the annular flange part interposed between a part outer peripheral end and the said mounting part outer peripheral end.
By fitting the annular cylindrical part of the protective ring to the outer peripheral end of the open part of the cylindrical part of the gas stopper main body and the mounting part of the operating handle facing it, the gas stopper main body and the operating handle can be It becomes a supported aspect. Thereby, even when vibration is applied to the gas stopper, it is possible to suppress rattling of the operation handle. Further, an annular flange portion projecting inwardly from the annular cylinder portion is interposed between the outer peripheral end of the opening portion and the outer peripheral end of the mounting portion opposite thereto, so that the gas plug main body and the operation handle Do not directly collide or rub against each other at the outer edges. Therefore, even in the respective inner portions where the operation handle and the cylindrical portion of the gas plug main body are fitted to each other, the mutual collision and rubbing are alleviated.

  In addition, since the protective ring is provided outside the waterproof packing, even if rainwater drips directly on the gas stopper or high-pressure water spray is sprayed, water may be directly applied to the waterproof packing. Absent. In addition, the waterproof packing is protected from external impacts and stimuli other than water such as dust and paint by the protective ring.

(2) The invention according to claim 2 is the gas plug according to claim 1, wherein “the protective ring is fixed in a tightly fitted state with respect to the outer peripheral end of the open portion of the cylindrical portion. The operation handle is rotatable relative to the outer peripheral end of the mounting portion '', and the operation handle is rotatable relative to the tubular portion and the protective ring. Even when the protective ring is attached, the frictional resistance when operating the operation handle does not increase, and the operability of the operation handle does not deteriorate.

(3) The invention according to claim 3 is the gas plug according to any of the above claims, wherein the waterproof packing includes the outer peripheral end of the open portion of the cylindrical portion and the outer peripheral end of the mounting portion of the operation handle. It is an annular body made of an elastic material having a substantially C-shaped cross section that is open between the outer peripheral end of the cylindrical portion and the outer peripheral end of the mounting portion of the operation handle. Although the protective ring is mounted, even if water intrudes beyond the protective ring, the water that has entered is configured to have an approximately C-shaped cross section. It is received by.

  According to the first aspect of the present invention, even when vibration during transportation or vibration from a main road or railway acts on the gas stopper, the outer peripheral end of the open portion of the cylindrical portion of the gas stopper main body and the operation handle facing it are mounted. The protective ring attached between the outer peripheral part of the unit reduces the vibrations of the two and prevents the gas plug body and the operating handle from colliding with each other. There is no inconvenience that the handle is damaged or parts such as the stopper pin are loosened, and the adverse effect on the gas stopper due to vibration can be prevented.

  Also, since the waterproof packing is protected from external impacts and stimuli such as water, dust or paint by the protective ring, for example, even if high-pressure water is sprayed toward the gas stopper, the waterproof packing is lifted by the water pressure. Thus, the waterproof performance is not deteriorated and water can be surely prevented from entering the gas plug body. Therefore, there is no inconvenience that the inside of the gas stopper main body is corroded and the operation handle is fixed to the gas stopper main body. Further, since dust can be prevented from entering between the cylindrical portion of the gas stopper main body and the back surface of the operation handle, there is no inconvenience that hinders the operability of the operation handle. Furthermore, when the protective coating material applied to the pipe connected to this type of gas stopper adheres to the waterproof packing and its mounting part and dries, it becomes a solid material, which hardens the surface of the waterproof packing and has a sealing property. There is a disadvantage that the paint that is peeled off or rubs against the waterproof packing when the gas stopper is operated and damages the waterproof packing. . Therefore, the above inconveniences can be prevented and the durability of the waterproof packing can be improved.

According to the invention which concerns on Claim 2, the gas stopper which provided the buffer function with respect to the vibration and improved waterproof performance can be provided, without impairing the operativity of an operation handle.
According to the third aspect of the present invention, even if water, dust or the like enters the gap beyond the protective ring, the water, dust, etc. are opened in a C-shape of the waterproof packing. Since it can be received by the portion and can be prevented from entering the gas plug main body, the waterproof performance and the dustproof performance can be further improved. Therefore, it is not necessary to set the airtightness of the waterproof packing so high that the operability of the operation handle is deteriorated or the pressure fluctuation is caused in the internal space of the gas plug due to the change of the outside air temperature.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is an overall view of a gas stopper according to a first embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of a main part of a waterproof packing and a protection ring mounting portion.
The gas plug main body (31) of this embodiment, like the conventional one, is opened upward in the drawing and accommodates a spiral frustoconical shape (3) and an upward opening thereof. It has a configuration including a cylindrical portion (33) continuous at the end.

  Further, on the upper surface of the thread (3), a pair of screws for engaging the engaging portion (22) provided on the back surface of the operation handle (2) to attach the operation handle (2) in a state of preventing relative rotation. The operating shaft (32) (32) is projected, and a presser spring for elastically pushing the screw (3) into the screw housing portion (30) into the operating shaft (32) (32). 35) is interposed.

  From the inner peripheral wall of the cylindrical portion (33), as shown in FIG. 2, arcuate engagement flange pieces (37) and (37) are partially projected inward, and the base end portion thereof An annular convex portion (38) protrudes upward from the top. An annular housing groove (36) for housing the waterproof packing (4) is formed at the outer base end portion of the annular convex portion (38), and a cylindrical portion ( As a part of the outer peripheral end of the open portion 33), an outer peripheral cylindrical portion (39) is projected in the circumferential direction.

  On the other hand, on the back surface of the operation handle (2), an engagement protrusion is fitted between the engagement flange pieces (37) and (37) and engaged with the engagement flange pieces (37) and (37) from below. The pieces (24) and (24) project outward, and the annular groove (20) into which the annular protrusion (38) is rotatably fitted is formed to open downward.

  Further, in order to restrict the rotation of the operation handle (2), the stopper pin (23) is screwed so as to pass through a predetermined position of the operation handle (2) and above the stopper pin (23). The sealing member (27) is screwed in, and the stopper pin (23) is sealed.

  The gas stopper body of the operation handle (2) in which the engagement protrusion (24) is engaged with the engagement flange piece (37) and the annular protrusion (38) is fitted in the annular groove (20). In the state of being attached to (31), between the receiving groove (36) and the back surface of the operation handle (2), the storage space (25) is sized so that the waterproof packing (4) is stored in a watertight state. As a part of the outer peripheral end of the mounting portion of the operating handle (2), the outer peripheral convex portion (21) faces downward on the back surface of the operating handle (2) facing the outer peripheral cylindrical portion (39). Projecting. A gap (S) having a predetermined width is formed between the upper surface of the outer peripheral cylindrical portion (39) and the lower surface of the outer peripheral convex portion (21).

  The accommodating space (25) is configured to communicate with the annular groove (20) and the gap (S), but the waterproof packing (4) is tightly accommodated in the accommodating space (25). Then, the passage toward the annular groove (20) is blocked, and the opening (44) of the waterproof packing (4) opens toward the gap (S).

  The waterproof packing (4) is an annular body made of an elastic material having a substantially C-shaped cross section that opens outward, and the upper piece (41) is an operation that follows the outer circumferential convex portion (21) and the inside thereof. The lower piece (42) is in close contact with the back surface of the handle (2), and is closely in contact with the outer peripheral cylindrical portion (39) and the receiving groove (36) inward of the outer cylindrical portion (39). The part (44) includes an upper piece (41) and a lower piece (42).

  Further, an annular protective sheet (10) is interposed between the inner peripheral surface of the thread accommodating portion (30) and the operation shaft (32) above the top surface of the thread (3), and the protective sheet Grease (40) is filled between (10) and the top surface of the thread (3).

A protective ring is provided between the outer peripheral end of the open portion of the cylinder upper portion (33) including the outer peripheral cylindrical portion (39) and the outer peripheral end of the mounting portion of the operation handle (2) including the outer peripheral convex portion (21) opposed thereto. Install (1).
The protective ring (1) includes an annular cylindrical portion (11) that is fitted on the outer peripheral surface of the outer peripheral cylindrical portion (39) and the outer peripheral surface of the outer peripheral convex portion (21) at the same time, and the inner peripheral periphery of the annular cylindrical portion (11). An annular flange portion (12) projecting inward from the surface and interposed between the outer peripheral cylindrical portion (39) and the outer peripheral convex portion (21).

  The annular cylindrical portion (11) is in close contact with the outer peripheral surface of the outer peripheral cylindrical portion (39), but is in contact with the outer peripheral surface of the outer peripheral convex portion (21) so as to be capable of relative rotation. The portion (12) is in close contact with the top surface of the outer peripheral cylindrical portion (39), but is not in contact with the lower surface of the outer peripheral convex portion (21). As a result, the protective ring (1) is in a state of being tightly fixed to the outer peripheral end of the open portion of the cylindrical portion (33) of the gas plug main body (31), and the operation handle (2) has the cylindrical portion (33). And it becomes possible to rotate with respect to the protective ring (1). Therefore, the operability of the operation handle (2) is not impaired.

  Even if vibration during transportation or vibration from main roads or railways acts on the gas stopper fitted with the protective ring (1), the outer peripheral end of the open part of the tubular part (33) of the gas stopper main body (31) By mounting the protective ring (1) between the mounting handle outer peripheral end of the operating handle (2) facing it, the rattling of the operating handle (2) can be alleviated, and the outer peripheral convex portion (21) is It is possible to prevent the cylinder portion (39) from directly hitting or rubbing. Along with this, the inner peripheral surface of the annular convex portion (38) and the annular concave groove (20), the lower surface of the engagement flange piece (37) and the upper surface of the engagement protrusion piece (24), and further the operation shaft (32 ) And the engagement portion (22) and the like are also alleviated and rubbed against each other. In this way, even if vibration acts on the gas stopper, the gas stopper main body (31) and the operation handle (2) are prevented from being damaged, and the stopper pin (23) and the sealing member (27) are loosened by the vibration. There is no inconvenience of dropping off.

  In addition, since the protective ring (1) is attached to the outer side of the waterproof packing (4), external impacts and stimuli such as rainwater, dust, paint, etc. are not directly affected on the waterproof packing (4). Therefore, the durability of the waterproof packing (4) is improved, and the waterproof and dustproof effects in the gas plug body (31) are further improved.

  In the unlikely event that high-pressure water acts on the mounting location of the protective ring (1), water or other foreign matter may pass over the protective ring (1), causing the outer cylindrical portion (39) and the outer convex portion (21) to Even if they enter the gap (S), the water and foreign matter remain in the open part (44) composed of the upper piece (41) and the lower piece (42) of the waterproof packing (4). Since it is received and stored on the upper surface of the lower piece (42), water and foreign matter do not enter the gas plug main body (31).

  Furthermore, even if water or foreign matter may enter the cylindrical part (33), the water and foreign matter are not blocked by the protective sheet (10) and grease (40). (3) It does not reach the sliding surface between the thread housing part (30). Therefore, it is possible to reliably prevent the sliding surfaces of the thread receiving portion (30) and the thread (3) of the gas plug body (31) from being rusted.

  In this way, by attaching the protective ring (1), the collision and rubbing between the operation handle (2) and the gas plug body (31) can be eased, and the waterproof and dustproof effect of the gas plug Will be even more certain.

  FIG. 3 shows a modification of the waterproof packing (4). The inner horizontal portion (13) that is in close contact with the top surface of the annular convex portion (38) and the ceiling of the annular concave groove (20) are made of synthetic rubber. An upper vertical part (14) that is in close contact with the part, a lower vertical part (15) that is in close contact with the base end of the annular convex part (38), and an outwardly projecting part that is in close contact with the outer surface of the annular concave groove (20) (16). In this waterproof packing (4), the inside of the gas plug main body (31) is secured by providing a portion in close contact with the inner peripheral surface of the annular groove (20) and the annular protrusion (38). In addition, the horizontal vibration of the operation handle (2) is mitigated by the inner horizontal part (13) and the outer protrusion part (16), and the upper vertical part (14) and the lower vertical part (15) The vertical vibration of the operation handle (2) is alleviated.

  A protective ring (1) is formed in the gap (S) between the outer peripheral end (18) of the cylindrical portion (33) of the gas plug body (31) and the outer peripheral end (28) of the mounting portion on the back surface of the operation handle (2). Put on. The outer peripheral surface of the outer peripheral end (18) of the open part and the outer peripheral end (28) of the mounting part are externally fitted and supported by the annular cylindrical part (11), and the annular flange part (12) is interposed in the gap (S). As in the first embodiment described above, the looseness of the operation handle (2) is alleviated and the operation handle (2) collides with the cylindrical portion (33) of the gas plug main body (31). You can ease the match.

  In this embodiment, in addition to buffering by the protective ring (1), the waterproof packing (10) can also be expected to have a buffering effect, thereby further damaging the operation handle (2) and the gas plug body (31) due to vibration. While being able to prevent reliably, a waterproof effect can be improved further.

1 is an overall sectional view of a gas stopper according to a first embodiment of the present invention. The principal part expanded sectional view which shows the gas stopper of 1st embodiment of this invention, the waterproof packing and the protection ring with which it is mounted | worn. The principal part expanded sectional view which shows the gas stopper in the 2nd embodiment of this invention, the waterproof packing attached to it, and a protection ring. The whole sectional view of the gas stopper with the conventional waterproof packing.

Explanation of symbols

(1) ・ ・ ・ ・ ・ ・ Protective ring
(11) ・ ・ ・ ・ ・ ・ Annular tube
(12) ・ ・ ・ ・ ・ ・ Annular flange
(2) ・ ・ ・ ・ ・ ・ Operation handle
(20) ... Fitting recess
(3) ...
(30) ...
(31) ... Gas plug body
(33) ... Cylindrical part
(4) ・ ・ ・ ・ ・ ・ Waterproof packing

Claims (3)

A cylindrical portion is connected to the open end of the gas plug body of the gas stopper main body, and an operation handle for rotating the screw accommodated in the gas cylinder housing portion is rotatable to the cylindrical portion. In the gas stopper that is mounted and a waterproof packing is interposed between the cylindrical portion and the back surface of the operation handle,
A protective ring is interposed between the cylindrical part and the back surface of the operation handle, which is located outside the waterproof packing,
The protection ring includes an annular cylindrical portion that is fitted on the outer peripheral end of the open portion of the cylindrical portion and the outer peripheral end of the mounting portion of the operation handle facing the cylindrical ring, and projects inwardly from the annular cylindrical portion and the opening. A gas stopper comprising an annular flange portion interposed between an outer peripheral end of the portion and an outer peripheral end of the mounting portion. 2. The gas stopper according to claim 1, wherein the protective ring is fixed in a close-fitting state with respect to the outer peripheral end of the open portion of the cylindrical portion, and at the outer peripheral end of the mounting portion of the operation handle. A gas stopper characterized by being capable of relative rotation. 3. The gas stopper according to claim 1, wherein the waterproof packing has an approximately C cross section that opens between the outer peripheral end of the cylindrical portion and the outer peripheral end of the mounting portion of the operation handle. A gas stopper characterized by being an annular body made of a letter-shaped elastic material.

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