JPH0659691U - Pipe fittings for piping - Google Patents

Abstract

(57) [Abstract] [Purpose] Automates the connection of sockets and plugs and the opening and closing of fluid passages, and improves workability and safety. Sampling work can be done quickly and safely by using it for connecting and disconnecting to improve work efficiency. A socket including an outer cylinder having a through hole on a side wall and a ball supporting cylinder inside a tip thereof, an inner cylinder having a valve for opening and closing a fluid passage therein, and a circumferential groove on an outer circumference, A pipe joint comprising a plug provided with a valve for opening and closing a fluid passage therein, and when the socket and the plug are connected to the ball support cylinder, the plug outer peripheral step portion is contacted to regulate the insertion amount of the plug. A stopper ball and a lock ball that engages with the circumferential groove of the plug to connect the socket and the plug are provided, and a spring is formed between the outer cylinder and the inner cylinder so as to form a pressure receiving chamber communicating with the flow hole. A slide cylinder is slidably provided through the slide cylinder, and a pressing portion that presses the stopper ball in the centripetal direction is provided at one end of the slide cylinder.
A release portion is provided adjacent to the pressing portion to release the stopper ball from the pressing portion when the slide cylinder is retracted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe joint suitable for connecting and disconnecting a sampling branch pipe of a fluid pipe and a sampling bottle for collecting samples from fluid pipes of various plants.

[0002]

[Prior art]

 For example, when collecting a sample from a fluid pipe of a chemical plant or the like, conventionally, a branch pipe equipped with a valve is provided in the main pipe, a bottle for sampling is connected to this branch pipe, and the valve is manually inserted. The samples were collected while opening and closing each time they were sampled.

[0003]

[Problems to be solved by the device]

 However, according to the above-mentioned conventional technique, the mounting of the sampling bottle and the opening / closing operation of the valve are performed manually, so that if the sampling location and the sampling frequency are high, the sampling operation will take a long time. There is a problem that the work is complicated and poor in workability, and if the sample is a corrosive solution or a solution that is harmful to the human body, the collection work must be careful and safe.

In view of the above points, the present invention aims to improve the workability as well as the safety by automating the connection between the socket and the plug and the opening / closing work of the fluid passage, and especially from the fluid piping of various plants to the sample. In order to collect the water, it is used for connecting and disconnecting the collection branch pipe of the fluid pipe and the bottle for sampling, so that the sampling work from the pipe of the plant etc. can be performed quickly and safely, and the work efficiency is improved. It is intended to provide a pipe joint for the piping.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a socket including an outer cylinder having a side wall with a through hole and a ball support cylinder inside the tip thereof, and an inner cylinder having a valve for opening and closing a fluid passage therein. A plug joint having a circumferential groove on the outer circumference and a plug provided with a valve for opening and closing a fluid passage therein, wherein the ball support cylinder has the plug outer peripheral step when the socket and the plug are connected. A stopper ball that abuts on a portion to regulate the insertion amount of the plug and a lock ball that engages with the circumferential groove of the plug to connect the socket and the plug. A slide tube is slidably provided via a spring so as to form a pressure receiving chamber communicating with the flow hole, and a stopper ball provided on the ball support tube is provided at one end of the slide tube in a centripetal direction. Press to press Provided with a part, the stopper ball when adjacent to the pressing portion retracting the slide cylindrical and configured to provided a release unit for releasing from said pressing portion.

[0006]

[Action]

 According to the present invention, when the plug is inserted into the socket, the lock ball provided on the ball support cylinder is pushed out in the centrifugal direction by the outer periphery of the plug, and when the outer peripheral groove of the inserted plug reaches the lower position of the lock ball, the lock ball is Engages with the circumferential groove of the plug to prevent the plug from being pulled out of the socket, completing the connection between the socket and the plug. At this position, the stopper ball provided on the ball support cylinder comes into contact with the outer peripheral step portion of the plug to prevent further insertion of the plug. In this state, when fluid pressure is applied to the pressure receiving chamber from the flow hole provided on the side wall of the outer cylinder of the socket, the slide cylinder retreats against the elastic force of the spring, and the pressing portion is moved by the retraction of the slide cylinder. The release part releases the stopper ball away from the stopper ball. As a result, the restriction of the insertion amount of the plug by the stopper ball that abuts the outer peripheral step of the plug and prevents the plug from being inserted further is released, and the plug can be inserted further into the socket. Become.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. In the drawings, 1 is a socket for attaching the rear end to the fluid pipe 2, and 3 is a plug for attaching the rear end to the sample bottle 4. The socket 1 includes an outer cylinder 5 and an inner cylinder 6 that is concentric with the outer cylinder 5 and shorter than the outer cylinder 5 and into which the tip of the plug 3 is fitted. The cylinder 6 is integrally fixed at the rear end side. A flange 7 having an opening concentric with the outer cylinder 5 is formed at the tip of the outer cylinder 5 toward the inside. The diameter of the opening of the flange 7 is substantially the same as the outer diameter of the inner cylinder 6.

A ball support cylinder 8 having an inner diameter capable of fitting the plug 3 therein is fitted inside the tip end of the outer cylinder 5 so as to be slidable in the axial direction. The lock ball supporting cylinder 8 is located inside the outer cylinder 5 and, from the tip side, engages with a circumferential groove 39 formed on the outer circumference of the plug 3 to connect the socket 1 and the plug 3 to each other. When the socket 1 and the plug 3 are connected, the plug 3 is abutted against the step 38 formed on the outer periphery of the plug 3 on the tip side of the circumferential groove 39 to prevent the plug 3 from being inserted further. A stopper ball 10 that regulates the insertion amount of the hook 3 is provided movably in the centrifuging direction. Reference numeral 11 is a fitting hole into which the lock ball 9 is fitted, and 12 is a fitting hole into which the stopper ball 10 is fitted.

The inner surface of the collar portion 7 formed at the tip of the outer cylinder 5 is a pressing portion 13 formed in a tapered surface, and when the ball support cylinder 8 advances, the lock ball 9 is centered. It is designed to be pressed. Reference numeral 14 denotes a release portion that releases the pressure of the lock ball 9 and allows the lock ball support cylinder 8 to move in the centrifugal direction when the lock ball support cylinder 8 retracts.

Reference numeral 15 is a slide cylinder fitted between the outer cylinder 5 and the inner cylinder 6 so as to be slidable in the axial direction. The tip of the slide cylinder 15 is inserted between the outer cylinder 5 and the ball support cylinder 8, and the inner circumference of the tip of the slide cylinder 15 is provided with the stopper ball 10 provided on the ball support cylinder 8 as the slide cylinder 15 advances. A pressing portion 16 for pressing in the direction is provided, and when the slide cylinder 15 is retracted adjacent to the pressing portion 16, the stopper ball 10 is released from the pressing portion to enable movement in the centrifugal direction. A release portion is provided, and further, a locking portion 18 that releases the stopper ball 10 at the time of retreating and then engages with the ball support cylinder 8 to retract it. Reference numeral 19 is a locking portion provided on the outer periphery of the rear end portion of the ball support cylinder 8 so as to be locked with the locking portion 18 of the slide cylinder 15.

A step portion 20 is formed on the inner peripheral surface of the outer cylinder 5 to abut the tip of the slide cylinder 15 and to restrict the slide cylinder 15 from further moving forward. The pressing portion 16 of the slide cylinder 15 is positioned so as to press the stopper ball 10 in the centripetal direction when in contact with the portion 20. A spring 21 for urging the slide cylinder 15 in the forward direction is interposed between the slide cylinder 15 and the socket 1. A spring 22 is interposed between the slide cylinder 15 and the ball support cylinder 8 for urging the ball support cylinder 8 in the forward direction.

A circulation hole 23 is formed in the side wall of the outer cylinder 5, and a communication hole 23 formed in the outer cylinder 5 communicates between the outer circumference of the slide cylinder 15 and the inner circumference of the outer cylinder 5. There is provided a pressure receiving chamber 24 for retracting the slide cylinder 15 against the elastic force of the spring 21 by receiving the fluid pressure fed from the outside through the circulation hole 23. Numerals 25 and 26 are seal rings provided between the outer circumference of the slide cylinder 15 and the inner circumference of the outer cylinder 5 so as to sandwich the pressure receiving chamber 24 in order to maintain the airtightness of the pressure receiving chamber 24.

Reference numeral 27 denotes a pipe mounting portion provided at the rear end portion of the socket 1, and has a male screw formed on the outer circumference. The socket 1 is attached to the fluid pipe 2 by screwing the pipe attachment portion 27 onto the attachment screw portion 28 provided on the fluid pipe 2. The fluid passage 29 of the attached socket 1 and the inside of the fluid pipe 2 communicate with each other.

Inside the socket 1, a valve 30 which is moved forward to close the fluid passage 29 and open backward is provided so as to be movable in the axial direction. The valve 30 is composed of a valve rod 31 and a valve head 32 provided at the rear end of the valve rod 31. As the valve 30 advances, the valve head 32 comes into contact with a valve seat 33 provided at the rear end opening of the socket 1. The fluid passage 29 is closed by means of retreat, and the fluid passage 29 is opened by retreating from the valve seat 33. A flange 34 is provided on the valve rod 31. A spring 35 for urging the valve 30 in the closing direction, that is, the tip direction is provided between the flange portion 34 and the socket 1, and the valve 30 is urged by the spring 35 to always close the fluid passage 29. Has become.

Reference numerals 36 and 37 are through holes formed in the side wall of the socket 1 and communicate with the fluid passage 29. One through hole 36 serves as an air introducing hole and the other through hole 37 serves as an exhaust hole. Therefore, the air can be sent from the air introduction hole which is one of the through holes 36, and the sample remaining in the fluid passage 29 of the socket 1 can be discharged from the discharge hole which is the other through hole 37.

On the other hand, in the plug 3, as described above, on the outer circumference thereof, the stepped portion 38 that is engaged with the stopper ball 10 and the circumferential groove 39 that is engaged with the lock ball 9 from the tip side. Are formed. Inside the plug 3, a valve 41 that moves forward to close the fluid passage 40 and open to retract the fluid passage 40 is provided movably in the axial direction. The valve 41 is composed of a valve rod 42 and a valve head 43 provided at the tip of the valve 42, and the valve head 43 is brought into contact with a valve seat 44 provided at the inner circumference of the tip opening of the plug 3 as the valve 41 moves forward. The fluid passage 40 is closed, and the fluid passage 40 is opened by retreating from the valve seat 44. The valve rod 42 is axially slidably supported by a support portion 45 provided on the inner circumference of the plug 3. A spring 46 for urging the valve 41 in the closing direction, that is, the tip direction is provided between the support portion 45 and the valve head 43. The valve 41 is always urged by the spring 46 to close the fluid passage 40. It is in a state. When the plug 3 is inserted into the inner part of the socket 1, the valve 30 of the socket 1 and the valve 41 of the plug 3 press each other to open the respective fluid passages 29 and 40.

Reference numeral 47 denotes a mounting portion of the sampling bottle 4 provided at the rear end portion of the plug 3, and an internal thread is formed on the inner periphery of the mounting portion 47. It is designed to be attached by screwing.

Next, the operation of the above embodiment and an example of its use will be described. First, the pipe mounting portion 27 provided at the rear end of the socket 1 is screwed onto the mounting screw portion 28 of the fluid pipe 2 to mount the socket 1 on the fluid pipe 2. Further, the mounting portion 47 provided at the rear end of the plug 3 is screwed to the mouth of the sampling bottle 4 to attach the plug 3 to the mouth of the sampling bottle 4 (FIG. 1).

Next, from this state, the plug 3 is inserted into the socket 1 by using an appropriate means. First, the plug 3 is fitted into the ball support cylinder 8 of the socket 1, and the step portion 38 formed on the outer periphery of the plug 3 is locked to the lock ball 9 provided in the ball support cylinder 8. When the plug 3 is further inserted, the ball support cylinder 8 is pushed by the plug 3 and retracts against the resilience of the spring 22, and the lock ball 9 is separated from the pressing portion 16 of the outer cylinder 5 to the releasing portion 17. Moving.

As a result, the lock ball 9 is pushed by the step portion 38 of the plug 3 and moves in the centrifugal direction, the plug 3 is released from the locked state with the lock ball 9, and the plug in the ball support cylinder 8 is released. 3 can be further inserted, and the ball support cylinder 8 which has retreated against the elastic force of the spring 22 advances due to the elastic force of the spring 22, and the lock ball 9 moves to the outer cylinder 5 of the outer cylinder 5. It comes into contact with the pressing portion 16 and is pressed in the centripetal direction. Then, when the circumferential groove 39 formed on the outer periphery of the inserted plug 3 reaches the lower position of the lock ball 9, the lock ball is brought into contact with the pressing portion 16 of the outer cylinder 5 and pressed in the centripetal direction. 9 engages with the circumferential groove 39, whereby the socket 1 and the plug 3 are locked by the lock ball 9 to prevent the plug 3 from being pulled out from the socket 1. At the same time, at this position, the outer peripheral step portion 38 of the plug 3 comes into contact with the stopper ball 10 provided on the ball support cylinder 8 to prevent further insertion of the plug, and the valve 30 of the socket 1 and the valve of the plug 3 are blocked. 41 is not yet in contact with each other, and the respective flow paths 29 and 40 are in a closed state (FIG. 2).

From this state, compressed air is sent into the pressure receiving chamber 24 through the flow hole 23 provided in the side wall of the outer cylinder 5 of the socket 1. The slide cylinder 15 receives this air pressure and retreats against the resilience of the spring 21, and by this retraction of the slide cylinder 15, the pressing portion 13 separates from the stopper ball 10 and the releasing portion 14 releases the stopper ball 10. After that, the locking portion 18 is locked to the locking portion 19 of the ball supporting cylinder 8 to retract the ball supporting cylinder 8, and the ball supporting cylinder 8 retracts so that the lock ball 9 presses the outer cylinder 5. It leaves 16 and moves to the release part 17 (FIG. 3). As a result, the restriction of the insertion amount of the plug 3 by the stopper ball 10 that comes into contact with the outer peripheral step portion 38 of the plug 3 and prevents the plug 3 from being inserted further is released, and the plug 3 is moved further into the socket 1. It becomes possible to insert it in the part.

Then, when the plug 3 is further inserted and the tip end of the plug 3 is inserted to the inner part of the socket 1, that is, the inner part 6 of the inner cylinder 6, the valve 30 provided inside the socket 1 and closing the fluid passage 29 is provided. The valve rod 31 and the valve head 43 of the valve 41, which is provided inside the plug 3 and closes the fluid passage 40, come into contact with each other and push against each other, and the valve 30 and the valve 41 retreat against the respective springs 35 and 46. , The valve head 32 of the valve 30 separates from the valve seat 33 and opens the fluid passage 29, so that the fluid pipe 2 and the fluid passage 29 of the socket 1 communicate with each other, and the valve head 43 of the valve 41 separates from the valve seat 44. The passage 40 is opened so that the fluid passage 40 of the plug 3 and the fluid passage 29 of the socket 1 communicate with each other (FIG. 4). At this time, the compressed air sent into the pressure receiving chamber 24 provided between the outer periphery of the cylinder 15 and the inner periphery of the outer cylinder 5 is removed, and the pressure receiving chamber 24 is in a pressureless state. As a result, the sample flowing through the fluid pipe 2 passes through the fluid passages 29 and 40 of the socket 1 and the plug 3 and flows into the sampling bottle 4 to collect the sample.

Now, the removal after collecting a predetermined amount of the sample in the sample bottle 4 is carried out by retracting or pulling out the plug 3 from the state of FIG. When the plug 3 is pulled from the socket 1, first, the valve 30 of the socket 1 and the valve 41 of the plug 3 are separated from each other and released from the mutual pressing, and the valve 30 of the valve 30 and the valve 41 of the plug 3 are biased by the spring 35 and the spring 46, respectively. Then, the fluid passage 29 of the socket 1 and the fluid passage 40 of the plug 3 are closed, and the sampling is stopped.

Then, the circumferential groove 39 of the retreating plug 3 is engaged with the lock ball 9 pressed against the pressing portion 13 of the outer cylinder 5 of the socket 1 in the centripetal direction. 1 and the plug 3 are locked again by the lock ball 9 to prevent the plug 3 from further pulling out from the socket 1. In this state, compressed air is sent into the socket 1 through one of the through holes 36 formed in the side wall of the socket 1 so that the sample remaining in the fluid passage 29 of the socket 1 is passed through the other through hole. It is discharged from the discharge hole 37.

When the sample remaining in the fluid passage 29 of the socket 1 is discharged from the discharge hole, compressed air is again sent to the pressure receiving chamber 24 from the flow hole 23 provided in the side wall of the outer cylinder 5 of the socket 1. The slide cylinder 15 receives this air pressure and retreats against the elastic force of the spring 21. When the slide cylinder 15 is retracted, the locking portion 18 of the slide cylinder 15 is locked to the locking portion 19 of the ball support cylinder 8 to retract the ball support cylinder 8, and the ball support cylinder 8 is retracted to lock the lock ball. 9 separates from the pressing portion 16 of the outer cylinder 5 and moves to the releasing portion 17 (FIG. 3). As a result, the plug 3 is released from the engagement state with the lock ball 9. Then, by pulling the plug 3 from the socket 1, the socket 1 and the plug 3 are separated, and the sampling bottle 4 can be removed. .

The data is collected from the fluid pipe 2 as described above. When the socket 1 and the plug 3 are connected and separated, the plug 3 is inserted into and pulled out from the socket 1, and the plug 3 is locked and locked. All operations such as release can be performed automatically by mechanical means without requiring human intervention.

[0027]

[Effect of device]

 As described above, according to the present invention, a socket including an outer cylinder having a through hole in a side wall and a ball supporting cylinder inside the tip thereof, and an inner cylinder having a valve for opening and closing a fluid passage therein, A pipe joint comprising a plug having a circumferential groove on the outer circumference and having a valve for opening and closing a fluid passage therein, wherein the ball support cylinder has an outer circumference of the plug when the socket and the plug are connected. A stopper ball that contacts the step portion to regulate the insertion amount of the plug and a lock ball that engages with the circumferential groove of the plug to connect the socket and the plug are provided. A slide cylinder is slidably provided via a spring so as to form a pressure receiving chamber communicating with the communication hole with the cylinder, and a stopper provided on the ball support cylinder is provided at one end of the slide cylinder. Press to push the ball in the centripetal direction Since the slide ball is provided adjacent to the pressing part and the releasing part is provided for releasing the stopper ball from the pressing part when the slide cylinder is retracted, the plug is inserted into the socket and the outer peripheral groove of the plug is locked by the lock ball. When it reaches the lower position, the lock ball engages with the outer peripheral groove of the plug to prevent the plug from being pulled out of the socket, and the connection between the socket and the plug is completed. The stopper ball comes into contact with the outer peripheral step of the plug to prevent further insertion of the plug.In this state, fluid pressure is applied to the pressure receiving chamber from the flow hole provided in the side wall of the outer cylinder of the socket, The slide cylinder retreats against the elastic force of the spring, and the retraction of the slide cylinder causes the pressing part to separate from the stopper ball and the release part to release the stopper ball. The restriction of the plug insertion amount by the stopper ball that abuts against the outer peripheral step of the plug and prevents the plug from being inserted further allows the plug to be inserted further into the socket. You can

Therefore, when the regulation of the insertion amount of the plug by the stopper ball that abuts on the outer peripheral step portion of the plug to prevent further insertion of the plug is released, and the plug is further inserted into the inner portion of the socket. By setting the valve of the socket and the valve of the plug to press each other to open the respective fluid passages, the socket valve and the plug valve do not come into contact with each other only by connecting the socket and the plug. The fluid passage remains closed, and the slide tube is retracted to release the restriction on the plug insertion amount by the stopper ball, and the plug is inserted further into the socket. Since the valves of the two push each other to open the respective fluid passages, the safety against fluid leakage is extremely high and Since the slide cylinder is operated by applying fluid pressure to the pressure receiving chamber from the flow hole provided on the side wall of the outer cylinder of the socket, remote operation without manual work is possible. The passage opening and closing work can be automated, improving workability and further improving safety.

Further, for example, when the sample is sampled, if the pipe fitting according to the present invention is used, it is necessary to manually connect and disconnect the sampling bottle to the fluid pipe and open / close the valve. Instead, all can be done automatically by mechanical means, so sampling work from piping in plants can be done automatically and quickly, and work efficiency can be improved. it can.

[Brief description of drawings]

FIG. 1 is a semi-longitudinal sectional view showing a separated state of a socket and a plug.

FIG. 2 is a semi-longitudinal sectional view showing a state in which a plug is inserted into a socket and locked.

FIG. 3 is a semi-longitudinal sectional view showing a state in which compressed gas is introduced into the pressure receiving chamber.

FIG. 4 is a semi-longitudinal sectional view showing a state in which the fluid passage is opened by further pressing the plug.

[Explanation of symbols]

 1 Socket 3 Plug 5 Outer Cylinder 6 Inner Cylinder 8 Ball Support Cylinder 9 Lock Ball 10 Stopper Ball 15 Slide Cylinder 16 Pressing Part 17 Release Part 21 Spring 23 Circulation Hole 24 Pressure Receiving Chamber 29 Fluid Passage 30 Valve 38 Stepped Section 39 Circumferential Groove 40 Fluid passage 41 valve

Claims (1)

[Scope of utility model registration request] 1. A socket comprising an outer cylinder having a side wall provided with a through hole and a ball support cylinder inside the tip thereof, an inner cylinder having a valve for opening and closing a fluid passage therein, and a circumferential groove on the outer circumference. And a plug having a valve for opening and closing a fluid passage therein, wherein the ball support cylinder abuts against the outer peripheral step of the plug when the socket and the plug are connected to each other. A stopper ball that regulates the insertion amount of the plug and a lock ball that engages with the circumferential groove of the plug to connect the socket and the plug, and that the flow hole is between the outer cylinder and the inner cylinder. A slide cylinder is slidably provided via a spring so as to form a communicating pressure receiving chamber, and a pressing portion for pressing the stopper ball provided in the ball support cylinder in the centripetal direction is provided at one end of the slide cylinder. , Pressing part A pipe joint for piping, characterized in that a release portion for releasing the stopper ball from the pressing portion is provided adjacently to the slide tube.