JPH0811995B2 - Pipe fitting and connection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint and a pipe joint connecting device. More specifically, the present invention relates to a pipe joint with an internal valve and a connection device that has a mechanism for mechanically holding the fluid pressure so that it does not separate when acting on the fluid pressure, and that can clean the pipe joint airtight seal portion by shifting the joint coupling position. .

[0002]

2. Description of the Related Art Many so-called quick fluid couplings (quick couplings) are commercially available. Among these, there is a type in which a so-called inner valve is provided inside the tip portion thereof, so that when separated, the fluid in the pipe does not leak to the outside. These connections are made by pushing in the connecting joints between the male and female pipes, but prevent the joints from trying to separate from each other even if the pushing force disappears when fluid pressure is applied. In order to protect the joint, a mechanism for holding the mutual positions of the joints by mechanical means (so-called locking mechanism) is added. There are various kinds of such mechanical position holding mechanisms, and a representative example thereof is a ball lock mechanism. FIG. 6 shows the structure of a conventional connection joint having an inner valve mechanism and a ball lock mechanism. First, the ball lock mechanism will be described. It is composed of a male pipe tip portion 2 having one groove portion (recess) 1 and a female pipe tip portion 4 in which a ball 3 is fitted in the groove portion 1 of the male pipe tip portion 2 to provide mechanical retention. In the female pipe tip portion 4, through holes 5 are provided at several places evenly around the tip of the female pipe wall, and for example, steel balls 3 are movably fitted into the through holes 5. ing. A sleeve 6 for pressing the ball and a spring 7 for restoring the sleeve 6 are formed on the outside thereof. 8 is a female pipe, 9
Indicates male pipe piping. A stopper 10 for preventing the sleeve from falling off is provided at the tip of the female pipe 8 (specifically, various types such as a half ring, a snap ring, and a spring wire are used). 20 is the centerline of the tube. Further, an O-ring 11 is provided on a part of the inner wall of the distal end portion of the female pipe for fluid sealing.

The internal valve mechanism will be described below. Inner valve 10
0 is substantially dish-shaped, and a seal (O-ring) 101 is provided at the tip edge portion thereof, and a spring 102 on the rear side presses it against the valve seat 103 to obtain a seal.
This spring is for automatically closing the inner valve,
A spring retainer 104 is provided (in the pipe) for the fixing. The spring retainer has an opening 10 through which the fluid passes.
5 are provided. 106 is a valve shaft. 107 is a tip protrusion. The operation (in the case of manual operation) of this type of connection joint will be described. At the time of connection, first, the sleeve 6 is pulled in the direction of the arrow r, the fixation of the ball 3 is released, and the ball is made movable to insert the male pipe 9 or the female pipe 8.
After inserting the male pipe 9, the sleeve 6 is moved in the direction opposite to the arrow r and returned to the original position. A spring 7 is built in so as to automatically return when the sleeve 6 is released. At the time of insertion, the inner valves in the male and female pipes move to a position where they are in balance with the spring force while contacting and pressing each other at the tip projection 107. The product flows through the gap and the fluid passage opening formed on the inner surface of the male and female tubes and outside the valve body. As shown in FIG. 6, in this state, the sleeve 6 holds the ball 3 and is locked without being disengaged even when the fluid internal pressure acts. This locking mechanism is required to prevent this as they tend to pull apart when the internal fluid pressure acts. At the time of disconnection, the inner valve 100 is designed to be seated on the valve seat 103 by a spring and then separated, so that the inner valve 100 can be separated without leakage to the outside. In the figure, reference numeral 108 is a flow path.

The connection joint having such a structure has a simple structure, is easy to operate, and can be used at high pressure and high temperature, and is therefore used in a wide variety of fields. further,
Such a connecting joint can be performed not only by manual operation but also by automatic operation, and is widely used in automatic joint connecting devices. That is, the same operation as manual operation can be realized by providing both the drive device for operating the sleeve and the drive device for inserting and connecting the male pipe 9 or the female pipe 8. A pneumatic cylinder is a typical example of these driving devices. If there is no lock mechanism, it is necessary to keep this pushing drive force, that is, the air pressure, for a long time, but if air is lost, they will try to separate from each other, which will lead to a washout accident.

[0005]

However, such a conventional connection joint cannot always sufficiently meet the following requirements. The demand for automation of the production site is not only in the assembly industry but also in the food and beverage manufacturing industries, and the automation of the system is required, and accordingly, the automatic joint connecting device is required. . on the other hand,
In the same industry, most of the time, it is often a batch production system. For example, when product brands are switched, for example, when the allotment production for the day is finished, the equipment is washed to prepare for the next day's production. Is being done.

[0006] In the production of foods and beverages, contamination due to bacterial growth of the residue that has entered the gap during the production process is extremely disliked. This is, of course, because spoilage may get mixed into the product, but if bacterial outbreak occurs, it is difficult to stop it, or if it is found, the treatment should be taken. This is because the work is difficult because it covers a wide area. For this reason, the cleaning work is frequently performed, and one of the subjects to be examined when automating the apparatus or system is the automation of cleaning. Therefore,
In the food and beverage manufacturing industry, when automating connection joints, what is particularly required for the joints is how to clean and keep the gasket (typically an O-ring) of the connection seal part clean. That's what it means. It is desired to develop a structure and an operation method that enable this.

Such cleaning work is as simple as possible,
It is desired that the cleaning be carried out promptly immediately after the transfer of the product is completed without bringing the apparatus to a separately provided cleaning station. A so-called cleaning-in-place (hereinafter referred to as CIP) method in which cleaning is performed while being mounted on the spot is preferable. The piping line is often cleaned by a so-called line CIP method in which a cleaning liquid is poured into the piping after the product has been poured. At that time, a joint connection with a structure that allows the O-ring seal part to be cleaned on the spot A device is preferred. On the other hand, the conventional quick coupling described above does not allow the O-ring to be cleaned on the spot while the line is still connected due to its structure. Since it cannot be washed in the field, it was insufficient for automated washing. Furthermore, since a spring, a spring retainer, etc. are provided inside the pipe, it is necessary to disassemble this part for periodic cleaning, and this work is difficult because there are many constituent parts.

As described above, the joint of the quick coupling with the internal valve having the conventional structure has only the function of connecting and sealing and does not consider the point of cleaning. Therefore, when the cleaning is automated by the CIP method. Had a problem. As the demand for devices that automatically connect joints increases, so does the need for connecting joints that enable mechanical retention. In such a case, a mechanical holding mechanism is provided, and the automatic operation of the mechanism is easy, and the cleaning of the O-ring as the seal portion and the seal contact surface is automatic and CI.
It is strongly desired to develop a connection joint having a structure with an inner valve that can be performed by the P method. To solve the above problems, the present invention uses a ball lock which is a simple mechanism for mechanical holding and also has a simple operation, and the O-ring and the contact surface can be easily and automatically cleaned by the CIP method. An object of the present invention is to provide a connection joint with an inner valve and a connection system therefor.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has (1) a pipe joint for connecting a male pipe and a female pipe, the inside of the female pipe being closer to the base side than the tip. The first sealing means for sealing the gap with the male pipe, the second sealing means at the tip of the first sealing means, and the first-stage holding means for the male pipe and the male pipe when the male pipe is completely fitted in the female pipe are provided. The second-stage holding means for both of them in a slightly pulled out state is provided, and
The first sealing means acts on the step fixing means, and when the second step fixing means holds the step fixing means, the front first sealing means is opened and the rear second sealing means works.
A pipe joint characterized by having an inner valve mechanism composed of a male pipe side valve body and a female pipe side valve body so that the valve is closed when the male pipe is pulled out, and (2) the tip portion is formed of a concentric double pipe. A female pipe and a male pipe composed of a concentric double pipe in which a tip portion of the outer pipe is fitted and coupled in a space between the double pipes, and the inner pipe is inside the tip portion of the female pipe. In order to seal the gap between the male pipe and the male pipe, a first sealing means is provided near the tip and a second sealing means is provided behind the first sealing means. When the first-stage holding means and the second-stage holding means for both of which the male pipe is slightly pulled out are provided, and the first-sealing means functions with respect to the first-stage holding means, and the second-stage holding means is used for holding. Makes the first seal means on the front side open and the second seal means on the rear side work, and the valve body on the male pipe side and the female pipe side on the male pipe side There is provided a pipe joint and having an inner valve mechanism to close the the withdrawing male pipe valve consists of a body.

[0010]

The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a longitudinal sectional view of a pipe joint according to an embodiment of the present invention, and FIGS. 2 and 3 are enlarged longitudinal sectional views of main parts for explaining the operation. Fig. 2 shows a completely connected state (when the product is in circulation), and Fig. 3 is a cross-sectional view showing the connected state with the female pipe slightly pulled out (during cleaning) (both with the inner valve closed). Yes). 4 and 5 are explanatory views of the overall configuration of the pipe joint. First, the overall configuration will be described. FIG. 4 shows the connection joint before connection, and FIG. 5 shows the connection joint after connection, and neither connection drive device is shown. 4 and 5, the lower side (female tube side) is moved upward (male tube side). The overall outline of this joint is similar in appearance to a sanitary valve used in the food industry, but a connecting piece portion 120 composed of a male pipe and a female pipe in the middle portion.
It is characterized by having. That is, 121 is an upper valve body, and usually the upper and lower parts of the spherical body 129 are integrally formed with the upper actuator 124 or the connecting coupling male pipe portion 122 by the connecting clamp 126. Reference numeral 123 denotes a connecting pipe, which is connected to, for example, a tank side pipe. A valve shaft extends through the upper top plate of the valve body, and an actuator 124 represented by an air cylinder is provided at the end of the valve shaft. A spring is provided inside the actuator, and is used for automatic return even if air disappears. Reference numeral 125 denotes a lower valve body, which connects the upper and lower parts of the sphere body to the clamp 12
6 and are integrally formed with the connection coupling female pipe 119 and the lower spring box 128. As will be described later with reference to FIG. 1, there is a valve shaft that penetrates the lower top plate of the valve body, and the valve shaft is connected to a return spring, which allows the valve body to automatically seat on the valve seat and the closing operation. Is done.
Reference numeral 127 is a connecting pipe, which is connected to, for example, a header side pipe. Reference numeral 128 denotes a spring box, but both the upper valve body 121 and the lower valve body 125 are widely used in the food industry, and are sanitary valves having excellent disassembly and cleaning properties. The sanitary properties and disassembly cleaning of the main body are proven. . Next, one embodiment of the pipe joint will be described in more detail. FIG. 1 is a vertical cross-sectional view showing a main part of a pipe joint including a spherical body of an upper valve body, an intermediate connection coupling portion (male pipe / female pipe), and a spherical body of a lower valve body. In FIG. 1, 12 is a female tube, 13 is a male tube, and 14 is a center line of the tube. Two grooves 15 and 16 are provided on the outer peripheral surface of the upper portion of the male pipe. The upper part of the male pipe has a connection part on the upper part and is connected to the valve body having a spherical body. A connection clamp 126 such as a sanitary clamp is used for the connection. A valve shaft 132 extends through the upper valve body 131 to the connection coupling side, and a disc-shaped valve body 133 is provided at the tip of the valve shaft. In FIG. 1, since a drive cylinder is provided on the upper valve body and pushed down from above to perform an opening operation, a seal ring 134 is provided upward on the upper surface of the tip of the valve body. A valve seat 1 inside the lower male pipe
35 is provided, and the sealability is secured by the lower surface of the valve seat and the upward seal ring 134 at the valve body end. The drive from top to bottom is done by supplying air pressure to the air cylinder, but since the return is done by a spring 136 incorporated in the actuator, the sealing is automatically realized by spring force. Even if the air in the air cylinder disappears, this spring allows the automatic return and close operation. On the lower surface of the dish-shaped upper valve body 133, a seal ring 138 that is airtight with the lower valve body 137 is provided. Further, the valve shaft 132 has a hollow cylindrical body 130 inside, and the inside of the cylindrical body is CI.
It is referred to as a P chamber 139. A narrow passage is formed in the center to form a CIP chamber. Reference numeral 58 is a cleaning liquid ejection hole. At the tip of the CIP chamber, there is a lid plate that also functions as a dispersion plate for laterally (circumferentially) dispersing the cleaning liquid that has flowed in the axial direction from the top. (Mixing prevention) Same as double seat valve. Two O-rings are provided inside the female pipe. The lower O-ring in the figure is the primary seal 17, which seals the fluid 18 to be the product, and the upper O-ring is 2
The next seal 19 is for sealing a cleaning liquid described later.

The female pipe 12 is provided with a groove 23 between the primary seal and the secondary seal. By moving the female pipe downward, the groove and the surface where the primary seal was in contact are made to face each other. At the same position, the groove is provided with a bulge in the radial direction, and the opening 5 through which the cleaning liquid is jetted is provided at the top of the bulge.
1 is provided so that the contact between the primary seal and the male pipe can be removed and the cleaning can be performed as described later. 52
Indicates the passage of the cleaning liquid. In the figure, reference numeral 24 denotes a connection portion with the female side pipe 25, and 26 denotes a sanitary clamp. Although a sanitary clamp joint is used in the example of the drawing, various means can be used for the connection portion of the male pipe or the female pipe with the pipe. It may be a screw joint or a flange joint. It can also be completely welded.
Through holes 27 are provided at the distal end of the female pipe 12 at even intervals on the outer peripheral surface, and balls 28 typified by steel balls are mounted in the through holes 27 so as to be movable. Further, a sleeve 29 is provided outside the ball to prevent the ball 28 from falling off and to provide an appropriate holding force. Inside the sleeve 29, a spring 30 for automatic return is provided. Further, in order to prevent the sleeve 29 from falling off, a retaining metal fitting 31 for preventing the sleeve from falling off is provided at the tip of the female tube (a C-ring or a simple spring wire is wound).
Further, the sleeve has a driving device (typically an air cylinder 36) for performing operations such as pulling the sleeve.
Is attached. There is a lower valve body inner valve body 137 in which a seal ring is positioned so as to contact and seal the base of the female pipe connecting portion. The central portion of the valve body is substantially funnel-like, and has an opening 140 that communicates with the atmosphere outside the system in order to discharge the cleaning liquid used for cleaning the inside of the valve body, as in the existing mixproof double seat valve. Is. 136 is an automatic return spring, which causes the valve element to close. 127 is a pipe, 141 is an upper top plate,
142 is a clamp and 143 is a lower top plate.

Next, the operation of the pipe joint will be described with reference to FIGS. In both cases, the inner valve is closed. FIG. 2 shows a state when the product 18 is flown (when the product is in circulation). The primary seal 17 realizes airtightness with respect to the first fluid (for example, a product such as food or beverage). The actuator attached to the upper part of the upper valve body 131 pushes down the upper valve body 133, and the lower valve body 137 comes into contact with the lower valve body 137 to be united and pushed down. The cleaning liquid is circulated after the first fluid (product) is circulated. This is shown in FIG. Prior to flowing the cleaning liquid 32, first, the sleeve driving device 36 is operated to pull the sleeve 29 to release the fixation of the locking ball 28, and then the female tube driving device (not shown) is used. The position of is changed slightly (in the example in the figure, the position is changed to the lower side). Such position movement is performed on the spot. FIG. 3 shows a state (cleaning position) in which the position is thus moved. Thus, as shown in FIG. 3, the ball 28 can be moved from the upper groove portion 15 to the lower groove portion 16 and fitted therein, and the sleeve can be returned to the original state and brought into the locked state to generate the holding force. As a result, the O-ring of the primary seal that seals the product food or beverage is separated from the contact surface. After this, the actuator is opened, the upper valve body 133 is pushed down, comes into contact with the lower valve body 137, is united, and is pushed down as described above. Then line cleaning liquid 3
Since 2 is flowed, the O-ring of the primary seal 17 is exposed to the liquid and is cleaned. Even at this position (cleaning position), it is difficult for the cleaning liquid to leak to the outside, so the secondary seal 19 is provided to realize the sealing property against the cleaning liquid. The material used for the sealing O-ring is appropriately selected from grades suitable for food production. Of course, the positions of the two-stage seal and the two grooves are appropriately dimensioned so that the above-mentioned operations and functions can be realized. Thus, at the position where the female pipe 12 is lowered,
The cleaning liquid ejection port 51 at the top of the groove located between the gasket contact surface of the next seal and the two-stage O-ring of the female tube faces each other, ejecting the cleaning liquid during the cleaning process and forcibly cleaning. And is discharged together with the cleaning liquid in the pipe. This is done depending on the degree of cleanliness required. When the cleaning of the inner surface of the pipe, the primary seal O-ring and the contact surface by the line CIP is completed, the inner valve is closed, and then the female pipe 12 is further pulled out in the direction of arrow s to disconnect it from the male pipe 13. When connecting the female pipe and the male pipe, as in the case of the manual operation, the sleeve is pulled by the driving device to once release the ball lock, and then the female pipe is inserted. After insertion, the sleeve is replaced and mechanically held.

In the above example, the cleaning liquid 50 is directly sprayed on the primary seal contact portion at the cleaning position. For this reason, the outlet 51 is set so as to come to a position opposite to the position where the primary seal 17 was in contact. The outlet is at the top of the groove, and the outlet may be provided with a spray. This opening is located at a substantially intermediate position between the primary seal and the secondary seal when the female pipe and the male pipe are connected. With this configuration, the cleaning effect on the contact surface can be enhanced by spraying the cleaning liquid 50 onto the primary seal contact surface at the same time when the cleaning liquid 32 is flown through the line. The O-ring, which is the primary seal, is sufficiently cleaned by increasing the flow rate of the line. Usually, in the method that is often used, the flow velocity in the pipe is 1.
It is said that if it is 5 m / sec or more, the cleaning effect is sufficient. Depending on the material of the O-ring used for the primary seal and the secondary seal, it can withstand high temperatures, so that it can be sterilized by blowing high-temperature steam, for example.

Next, an apparatus for automatically performing the connecting operation of the connecting joint will be described with reference to FIG. In the figure, the upper and lower valve bodies and the valve body valve seat portion are omitted. 33 in the figure
Is the female tube side, and 34 is the male tube side, which have been described above. Reference numeral 35 in the drawing denotes a drive device for fitting the female pipe with the male pipe to change the position of the female pipe. It is typically an air cylinder, but is not limited to this.
Further, reference numeral 36 in the figure denotes a sleeve driving device on the female tube side, and it is necessary to move the sleeve when releasing the fixation of the above-mentioned fixation means (ball 28 and groove portions 15 and 16) or re-fixation. There is a drive for that. Further, although a centering is required when connecting and connecting both pipes, it has a positioning mechanism for that purpose, and as a typical example, a combination of a guide pin 37 and a guide hole block 38 is used. 39 is a guide pin pedestal and 40 is a guide hole block pedestal. It should be noted that a drive mechanism that operates as described above to cause a change in the positional relationship between the male pipe and the female pipe and that has a control function for aligning with the accuracy required for ball locking is provided. It can also be used. Such precision adjustment itself can be performed with an accuracy of ± 0.5 mm and further with an accuracy of ± 0.1 mm by using recent automated element technology.

Further, a modified embodiment of the pipe joint of the present invention will be described with reference to FIGS. In these,
The same reference numerals as those in FIG. 7 indicate the same things. FIG. 8 shows a modification of the structure of the ball lock system. In the case of FIG. 1, since the seal and the ball lock groove are arranged in series, the distance becomes long, and the space between the bottom of the upper spherical main body and the upper valve seat portion in the male pipe becomes large, so that the accumulation portion becomes large. In order to reduce this, FIG. 8 shows a ball lock arranged in parallel with the gasket contact surface concentrically. Concentric double-tube female tube (lower) and concentric double-tube male tube (upper)
Are combined. The inner tube of the female tube is inserted and joined in the space between the double tubes of the male tube. Two O-rings are vertically arranged on the inner surface of the inner tube of the female tube. Reference numeral 17 is a primary seal, and 19 is a secondary seal. The outer tube of the female tube is a ball lock mechanism section. A ball pressing sleeve is provided outside the ball lock mechanism. The inner side of the male pipe has a valve seat 135 for the upper valve body.
Is provided. The outer pipe of the male pipe has two grooves 1
5 and 16 are provided and are used for ball lock. Reference numerals 150 and 151 denote an inner tube and an outer tube of the male tube,
Reference numerals 152 and 153 denote an inner tube and an outer tube of the female tube. 15
Reference numeral 6 indicates a lower valve body. FIG. 9 is intended to further reduce the accumulation of the bottom of the spherical body and the upper valve seat of the male pipe. In this case, extend the locking mechanism in the radial direction to a position where there is no tank-side connection piping,
It is arranged at several places on the circumference, preferably at four places. Furthermore, in order to make the vertical dimension as short as possible, the locking mechanism is provided outside the spherical body. FIG.
Reference numeral 0 denotes guide holes for guide pins 154 at several, preferably four ball lock tips on the circumference used in FIG.
The guide pin 155 is provided with a two-step groove for a lock mechanism. It has both positioning and holding mechanism. In FIG. 11, the primary seal is a surface pressure seal type, and since the seal does not slide during insertion and removal, it is preferable from the viewpoint of the life of the seal. In this case, the direction of the cleaning liquid ejection port 51 is properly adjusted toward the contact surface of the primary seal. Furthermore, FIG.
FIG. 2 is another example of the structure for forming a cleaning liquid ejection chamber for cleaning the primary seal contact surface in the structure of FIG. 8, and is an enlarged view of a main part. The state indicates the wash position. An O-ring is provided on the outer side of the inner end of the female pipe and on the inner side of the female pipe, and the ejection chamber 53 is a hermetically sealed space that sandwiches the male outer pipe when moving to the cleaning position.
Is formed, and a cleaning liquid supply port is provided at the lowermost portion of the female pipe outer pipe so as to communicate with this space, and a plurality of small holes are provided in the radial direction near the lower portion of the secondary seal of the inner pipe of the female pipe. At the cleaning position, when the cleaning liquid 55 is supplied from the supply port 54, the cleaning liquid temporarily accumulates in the previously sealed space and is ejected from the plurality of small holes 56 formed in the inner pipe to effectively clean the primary seal contact surface. To do. The position of the small hole can be set just below the secondary seal. In this case, the cleaning liquid flows down on the outer surface of the male pipe inner tube and flows down into the gap formed between the inner side of the female pipe inner tube and the outer side of the male pipe inner tube. If the gap is designed to be sufficiently narrowed, the flow velocity increases and a sufficient cleaning effect can be obtained.
FIG. 13 shows the cleaning liquid ejection port portion provided on the female pipe wall further extended in the radial direction. As a result, the distance from the primary seal contact surface is increased and the number of jet ports 57
Is to enhance the effect of jet cleaning. In this case, by arranging a wide-angle type sprayer having a large spray angle at the top jet, it is possible to clean a wider range. 14
Is a valve body actuator 160 attached below the lower valve body 151, for example, a pneumatic drive cylinder is provided below. In this case, the valve seat portion is directly provided on the upper valve body 172 without providing the valve seat on the inner lower portion of the coupling male pipe. The lower valve body 156 is also provided with a valve seat. In this case, the lower valve body 161 moves in the connection coupling 173 and pushes up the upper valve body 162 from the bottom to the top. The drain hole 16 is provided at the center of the lower valve body 161.
3 is provided to facilitate drainage of the drain 169. A CIP chamfer 1 that sprays a cleaning liquid 164 concentrically with the valve shaft is further provided in the center of the lower valve body 161.
In the state shown in the same figure, there is a gasket attached to the inside of the connection coupling 173 and the lower surface of the upper valve body 162 (when the lower valve body presses against the upper valve body and moves upward, a seal is formed). (Which is provided to do) can be washed. As a result, it is possible to completely clean the portion that comes into contact with the product liquid. 166,
167 is a valve seat portion, and 168 is an automatic return spring. Further, 170 is a clamp, and 171 is an upper top plate.

The above-mentioned cleaning liquid ejection port can also be used for detecting product leakage from the primary seal. In other words, take out the leaked product from the spout with a pipe,
Leakage can be detected by providing a conductivity meter along the route. This makes it possible to know the degree of deterioration of the primary seal, which is preferable for product management.

[0017]

The present invention solves the drawbacks of the conventional pipe joints, which will be summarized below. In a connection joint using a ball lock mechanism which is one of simple mechanical holding mechanisms, it is possible to clean the contact surface and / or the sealing means (O-ring), which was not possible in the past. The contact surface and / or the sealing means (O-ring) can be cleaned without breaking the connection of the pipe joint. Ie CIP
Suitable for automation because it can be a system. Since the cleaning liquid can be jetted to the primary seal contact surface depending on the required degree of cleaning, the cleaning effect can be enhanced. If necessary, high-temperature steam can be jetted instead of the cleaning liquid, so that a sterilizing effect can be obtained. Cleaning of the primary seal and detection of product leakage from the primary seal can be done by one means.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of one embodiment of a pipe joint of the present invention,
Shows the state when combined

FIG. 2 is a sectional view of an essential part of one embodiment of the pipe joint of the present invention.

FIG. 3 is a sectional view of an essential part of one embodiment of the pipe joint of the present invention.

FIG. 4 is an explanatory view showing a state before connection of the pipe joint of the present invention.

FIG. 5 is an explanatory view showing a state after connection of the pipe joint of the present invention.

FIG. 6 is a cross-sectional view showing the structure of a conventional connection joint.

FIG. 7 is an overall explanatory view of a pipe joint connection device of the present invention.

FIG. 8 is a cross-sectional view of another example of the pipe joint of the present invention.

FIG. 9 is a cross-sectional view of another example of the pipe joint of the present invention.

FIG. 10 is a cross-sectional view of another example of the pipe joint of the present invention.

FIG. 11 is a cross-sectional view of another example of the pipe joint of the present invention.

FIG. 12 is a cross-sectional view of another example of the pipe joint of the present invention.

FIG. 13 is a cross-sectional view of another example of the pipe joint of the present invention.

FIG. 14 is a cross-sectional view of another example of the pipe joint of the present invention.

[Explanation of symbols]

 12 Female pipe 13 Male pipe 15 Groove part 16 Groove part 17 Primary seal 18 Product 19 Secondary seal 23 Groove part 24 Connection part 25 Female pipe side pipe 26 Sanitary clamp 27 Through hole 28 Ball 29 Sleeve 30 Spring 31 Holding metal fitting 32 Cleaning liquid 33 Female pipe Side 34 Male pipe side 35 Female pipe drive device 36 Female pipe sleeve drive device 37 Guide pin 38 Guide hole block 50 Cleaning liquid 51 Blowout port 52 Passage 53 Ejection chamber 54 Supply port 55 Cleaning liquid 56 Small hole 57 Ejection hole 58 Ejection hole 119 Connection cup Ring female pipe 120 Connection piece part 121 Upper valve body 122 Connection coupling male pipe part 123 Piping 124 Upper actuator 125 Lower valve body 126 Connection clamp 127 Piping 128 Spring box 129 Spherical body 130 Cylindrical body 13 1 Upper Valve Body 132 Valve Shaft 133 Upper Valve Body 134 Seal Ring 135 Valve Seat 136 Automatic Return Spring 137 Lower Valve Body 138 Seal Ring 139 CIP Chamber 140 Opening 141 Upper Top Plate 142 Clamp 143 Lower Top Plate

Claims (13)

[Claims] 1. A first sealing means having a pipe joint for connecting a male pipe and a female pipe, and sealing a gap between the male pipe and the male pipe on the base side from the tip inside the female pipe; A sealing means is provided, and further, first stage fixing means for both when the male tube is completely fitted in the female tube, and second stage fixing means for both when the male tube is slightly pulled out, respectively, and first stage fixing The first sealing means acts on the means, and when the second stage holding means holds the first sealing means, the first sealing means on the front side is opened and the second sealing means on the rear side is opened.
A pipe joint characterized in that it has an inner valve mechanism that is configured to act as a sealing means and that is configured by a male pipe side valve body and a female pipe side valve body so that the valve is closed when a male pipe is pulled out. 2. A sleeve provided on the outer side of the female pipe as the first and second stage holding means is movably fitted into a plurality of through holes provided at the tip of the female pipe and is inserted into a groove of the male pipe. 2. The pipe joint according to claim 1, wherein a fitted ball is pressed to thereby hold the female pipe and the male pipe in a predetermined positional relationship and prevent the male pipe from coming off. 3. The pipe joint according to claim 2, wherein a spring is provided inside the sleeve to perform automatic return. 4. The pipe joint according to claim 1, wherein the inner surface of the female pipe has a height difference, and the first sealing means or the second sealing means is provided at a position higher than the height difference. 5. A cleaning liquid outlet is provided on the female pipe portion side at a position corresponding to a substantially intermediate point between the first sealing means and the second sealing means, and a flow path communicating with the outlet is provided in the female pipe portion wall. The pipe joint according to claim 1, wherein the pipe joint is provided in the pipe joint. 6. The pipe joint according to claim 5, wherein leakage is detected through a blowout port. 7. The connecting portion of the male pipe upper part and the female pipe lower part,
The pipe joint according to claim 1, wherein the pipe joint is connected to each of the valves. 8. A female tube having a concentric double tube at its tip,
A male tube made of a concentric double tube in which a tip portion of the outer tube is fitted and coupled in a space between the double tubes, and a male tube is provided inside the inner tube at the tip portion of the female tube. In order to seal the gap between the first pipe and the second pipe, a first sealing device is provided near the tip and a second sealing device is provided behind the first sealing device. , The second-stage holding means for both of them is provided in a state where the male pipe is slightly pulled out, and the first sealing means functions with respect to the first-stage holding means, and when the second-stage holding means is used for holding, the front first (1) The seal means is opened so that the second seal means on the rear side works, and the inner valve mechanism is composed of the male-pipe-side valve body and the female-pipe-side valve body so that the valve is closed when the male pipe is pulled out. A pipe joint characterized by the above. 9. A sleeve provided outside the outer tube of the female tube as the first and second step holding means is movably fitted in a plurality of through holes provided at the tip of the outer tube of the female tube. 9. The pipe joint according to claim 8, wherein a ball fitted in the groove of the male pipe is pressed to thereby hold the female pipe and the male pipe in a predetermined positional relationship and prevent the male pipe from being separated from each other. 10. A spring is provided inside the sleeve,
The pipe joint according to claim 8, which is automatically restored. 11. The pipe joint according to claim 8, wherein the pipe is connected to the valve at the connection portions of the male pipe upper portion and the female pipe lower portion, respectively. 12. A pipe joint connecting device comprising the pipe joint according to claim 1, and a drive device for connecting, aligning, separating or operating a sleeve of the joint. . 13. The connection device according to claim 12, wherein the drive of the sleeve is performed by a drive device provided on the female tube side.