JP2001355778A - Pipe joint with cleaning function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously improve the reliability of connection by eliminating a poor connection due to liquid remaining at disconnection. SOLUTION: A pipe joint with a cleaning function has hole portions 58 formed at circumferential intervals in a wall portion 51a forming a recessed portion 51 of a socket 22, locking balls 59 disposed in the hole portions 58 for local projection and retraction into and from the recessed portion 51, and a sleeve 53 disposed peripherally to provide an axial slide that presses the locking balls 59 out into the recessed portion 51 from the hole portions 58 and holds them engaged with an engaging groove 35 formed in a plug 23. The socket 22 is connected with a wash water supply tube 74 from a wash water supply source. Supply lines 72, 65 and 64 are formed to lead wash water fed thereto from the wash water supply tube 74 to a space portion 66 formed around the recessed portion 51. The wall portion 51a forming the recessed portion 51 has a spout hole 71 for spouting the wash water led to the space portion 66 into the recessed portion 51.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint for connecting a flow path for guiding a liquid such as a semiconductor high-purity chemical or a general chemical, and more particularly to a pipe joint having a cleaning function provided with a cleaning function. Things.

[0002]

2. Description of the Related Art Generally, as means for connecting flow paths for guiding liquids such as semiconductor high-purity chemicals and general chemicals, a socket in one flow path and a plug in the other flow path are connected to each other. Pipe joints are used to connect and communicate the above flow paths. Examples of this type of fitting include a fitting having a screw-in type locking mechanism including a stopper which holds a state in which the socket and the plug are connected by rotating while the plug is inserted into the socket, and a plug. There is known a device having a one-touch lock mechanism for holding a state in which channels are connected to each other by inserting a socket into a socket.

[0003]

By the way, in the above-described pipe joint, when the flow paths are divided from each other, the liquid at the connecting portion remains, but when the connection is released, the liquid remains. Depending on the type of liquid, the joints may then clump or stick, in which case the function of the locking mechanism described above will be impaired, resulting in poor connection, There was a risk that the reliability of the connection would be reduced.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pipe joint having a cleaning function with extremely high connection reliability, which does not cause a connection failure due to a liquid remaining when the connection is released. I have.

[0005]

According to a first aspect of the present invention, there is provided a pipe fitting having a cleaning function, comprising a socket and a plug, wherein the socket and the plug are connected to each other to form a flow connector. A pipe joint for communicating paths, wherein one of the socket and the plug is provided with a lock mechanism for maintaining a connection state of the socket and the plug, and a cleaning mechanism for supplying a cleaning liquid to the lock mechanism for cleaning. It is characterized by having.

As described above, since the cleaning mechanism for cleaning the lock mechanism for maintaining the connection state between the socket and the plug is provided, even if the liquid remaining at the time of disconnection adheres to the lock mechanism, the liquid that has adhered to the lock mechanism is provided. It is possible to solve the problem that the lock mechanism does not function due to the solidification or the viscosity of the residual liquid. As a result, the connection state of the socket and the plug can always be kept in a good condition, and the reliability of the connection can be improved.

[0007] The pipe joint with a cleaning function according to claim 2 is
2. The pipe fitting with a cleaning function according to claim 1, wherein the socket is formed with a recess in which the plug is fitted, and the lock mechanism is formed on a wall forming the recess at intervals in a circumferential direction. 3. Hole, a locking ball provided in the hole, a part of which can be protruded and retracted into the concave portion, and the locking ball provided on the outer peripheral side and slid in the axial direction, the locking ball is moved from the outer peripheral side. And a sleeve that presses and protrudes from the hole into the recess and maintains a state of engagement with an engagement groove formed around the plug fitted into the recess.

In other words, a locking mechanism for connecting and disconnecting the socket and the plug is provided by causing the locking ball to protrude and retract into the inner side of the concave portion by sliding the sleeve. It can be performed very easily with one touch, and by cleaning the lock mechanism of this structure by the cleaning mechanism, the sliding of the sleeve and the protrusion and removal of the locking ball in the recess can always be maintained in a good state. Can,
Thereby, both the easiness of connection and the reliability of connection can be improved.

[0009] The pipe joint with a cleaning function according to claim 3 is characterized in that:
3. The pipe fitting with a cleaning function according to claim 2, wherein the socket is connected to a cleaning liquid supply tube connected to a cleaning liquid supply source for supplying a cleaning liquid, and the cleaning liquid supplied from the cleaning liquid supply tube is formed on an outer peripheral side of the recess. A supply path leading to the space is formed, and a discharge port for discharging the cleaning liquid fed into the space into the recess is formed in a wall forming the recess.

That is, since the cleaning liquid sent from the cleaning liquid supply source is jetted out of the jetting hole communicating with the space into the concave portion, the locking ball into which the plug is fitted and the locking ball which comes into and out of the concave portion are surely washed. Therefore, it is possible to reliably solve the problem caused by the residual liquid and to secure high reliability.

[0011] The pipe fitting with a cleaning function according to claim 4 is characterized in that:
The pipe fitting with a cleaning function according to claim 3, wherein the plurality of ejection holes are formed in the recess at intervals in a circumferential direction, and the ejection holes are formed at an angle in the same direction with respect to a radial direction. It is characterized by being formed.

Since the ejection holes formed at intervals in the circumferential direction are formed at an angle in the same direction with respect to the radial direction, the cleaning liquid ejected from the ejection holes into the recess is formed. Rotate along the inner surface and let it flow,
The inner surface of the concave portion and the locking ball protruding into and out of the concave portion can be more reliably washed, and the problem due to the residual liquid can be more reliably eliminated, and high reliability can be secured.

According to a fifth aspect of the present invention, there is provided a pipe fitting with a washing function.
The pipe fitting with a cleaning function according to claim 3 or 4, wherein the ejection hole is formed outside a seal portion of a flow path that is communicated by connecting the socket and the plug. I have.

That is, since the ejection hole is provided outside the seal portion of the flow path that is communicated by connecting the socket and the plug, the socket and the plug are connected to communicate the flow paths of each other. When letting the liquid flow,
Even if the cleaning liquid is supplied and jetted from the ejection holes, the cleaning liquid does not enter the communicating flow path, and therefore, it is possible to reliably prevent the cleaning liquid from being mixed into the liquid.

According to a sixth aspect of the present invention, there is provided a pipe fitting with a washing function.
The pipe fitting with a cleaning function according to any one of claims 3 to 5, wherein the socket is provided with an on-off valve for opening and closing the supply path.

That is, the supply path is opened and closed by the on-off valve provided in the socket, so that the cleaning liquid can be reliably supplied to the lock mechanism when necessary, and the cleaning operation can be performed.

A pipe joint with a washing function according to claim 7 is
The pipe fitting with a cleaning function according to any one of claims 3 to 6, wherein an on-off valve for opening and closing a flow path in the cleaning liquid supply tube of the cleaning liquid supply tube is provided.

As described above, by opening / closing the flow path of the cleaning liquid supply tube by the opening / closing valve provided in the cleaning liquid supply tube, it is possible to reliably supply the cleaning liquid to the lock mechanism when necessary and perform the cleaning operation. it can.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a pipe joint with a cleaning function according to the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 21 denotes a pipe joint with a cleaning function (hereinafter, referred to as a pipe joint). The pipe joint 21 includes a socket 22 and a plug 23 to which the socket 22 is connected. The pipe 2 is connected to the socket 22 at the rear end, and the plug 23 is connected to the rear end at the rear end.
The pipeline 3 is connected.

Next, the socket 2 constituting the pipe joint 21 will be described.
2 and the plug 23 will be described in detail. First, the configuration and structure of the plug 23 to which the socket 22 is connected will be described. Reference numeral 25 denotes a main cylinder body having a liquid passage 26 formed therein. Inside the main cylinder body 25, a valve 27 to which an O-ring 28 is attached is slidably provided near the distal end. The valve 27 has an O-ring 2
A flow path 31 communicating between the inside and the outside of the valve 27 is formed on the rear end side of the flow path 8.

A spring 32 is fitted into the rear end of the valve 27, and the spring 32 urges the valve 27 toward the distal end of the main cylinder 25, so that the valve 27 is located near the distal end of the valve 27. O-ring 28 provided
Is brought into contact with the valve seat 33 of the opening 26 a formed at the tip of the main cylinder 25, so that the liquid passage 26 is closed. Reference numeral 34 denotes the liquid passage 2 of the main cylinder 25.
6 is a stopper that is fitted into the stopper 6 and locks the spring 32. An annular engagement groove 35 is formed on the outer peripheral surface of the main cylindrical body 25 so as to extend in the circumferential direction.
When the socket 22 is connected to the plug 23, a locking ball 59 to be described later is engaged with the engagement groove 35.

Next, the structure and structure of the socket 22 connected to the plug 23 having the above structure will be described. Reference numeral 41
Is a main cylinder having a liquid passage 42 formed therein, and a valve 43 is slidably provided inside the main cylinder 41. At the tip of the valve 43, a pressing projection 4
4 is formed, and the pressing protrusion 44 is
From the opening 42a. Also, the valve 43
An O-ring 45 is attached near the front end of the valve 43. On the rear end side of the O-ring 45, a valve 43 is provided.
A flow path 46 communicating with the inside and the outside is formed.

A spring 47 is fitted into the rear end of the valve 43, and the spring 47 urges the valve 43 toward the distal end of the main cylinder 41, so that the valve 43 is located near the distal end of the valve 43. O-ring 45 provided
Is brought into contact with the valve seat 48 of the opening 42a formed at the distal end of the main cylindrical body 41 so that the liquid passage 42 is closed.

Further, an adapter 4 having a flow path 50 at the center to which the pipe 2 is connected is provided at the rear end of the main cylinder 41.
9 is attached, and a spring 47 is locked by the adapter 49.

A concave portion 51 is formed on the distal end side of the main cylindrical body 41, and the plug 2 is formed in the concave portion 51.
The third main cylinder 25 is fitted. An O-ring 52 is fitted into the inner surface of the recess 51, and when the main cylinder 25 of the plug 23 is fitted into the recess 51, the O-ring 52 is in close contact with the outer peripheral surface of the main cylinder 25 of the plug 23. ,
The inner peripheral surface of the concave portion 51 and the outer peripheral surface of the main cylindrical body 25 of the plug portion 23 are sealed.

Next, the lock mechanism provided on the socket 22 will be described. A sleeve 53 is slidably provided on the outer periphery of the main cylinder 41, and a stop ring 54 provided at the tip of the main cylinder 41 causes the sleeve 53 to slide.
Of the sleeve 53 is prevented from falling off from the front end portion.
A protrusion 55 is formed on the inner surface of the sleeve 53 in the vicinity of its distal end, and a spring 55 is provided between the protrusion 55 and a housing 61 provided on the outer peripheral surface of the main cylinder 41, which will be described later. 57 are provided. And
The spring 53 causes the sleeve 53 to move the main cylinder 4
1 is always urged toward the tip.

A mortar-shaped hole 58 is formed in the vicinity of the distal end of the main cylindrical body 41 at intervals in the circumferential direction, and a locking ball 59 is formed in the hole 58. 5
8 is provided. When the sleeve 53 is moved toward the rear end of the main cylinder 41, the locking ball 59 can be protruded and retracted into the inner surface of the concave portion 51 of the main cylinder 41, and the sleeve 53 is biased by the spring 57. When the locking ball 59 is moved to the distal end side, the locking ball 59 is pressed inward by the projection 55 of the sleeve 53, and a part of the locking ball 59 is maintained in a state of protruding from the recess 51.

A housing 61 is provided on the outer peripheral side of the main cylinder 41, and the tip of the housing 61 enters the inner peripheral side of the sleeve 53.
The spring 57 is locked by the distal end of the spring 57. By sliding the sleeve 53 in the axial direction, the rear end of the sleeve 53 slides on the outer peripheral surface of the housing 61 in a liquid-tight manner.

Next, the cleaning mechanism provided in the socket 22 will be described. The main cylinder 41 has a housing 61.
The portion covered by the groove 62 has a groove 62 formed in the axial direction and an annular groove 63 formed in the circumferential direction. The portion surrounded by the surface is a washing water communication passage (supply passage) 64 and a washing water annular passage (supply passage) 65. The washing water communication passage 64 has one end communicating with the washing water annular passage 65 and the other end communicating with the space 66 in which the spring 57 is housed.

A plurality of ejection holes 71 communicating with the space 66 are provided on the wall 51a forming the recess 51 of the main cylinder body 41 at the tip side of the O-ring 52 at intervals in the circumferential direction. It is formed. These jet holes 71 are shown in FIG.
As shown in FIG. 5, the respective grooves are formed at an angle in the same direction with respect to the radial direction, and are further formed toward the bottom of the concave portion 51.

A washing water supply passage (supply passage) 72 communicating with the washing water annular passage 65 is formed in the housing 61. The washing water supply passage 72 is rotated in the middle of the washing water supply passage 72. An opening / closing valve 73 for opening and closing the washing water supply path 72 is provided. A washing water supply passage 72 is opened at the rear end of the housing 61, and a washing water supply tube 74 is connected to this opening.
The cleaning water supply tube 74 is connected to a cleaning water supply source (cleaning liquid supply source) (not shown), and the cleaning water is supplied from the cleaning water supply source. The washing water passes through the washing water supply passage 72 of the housing 61, is then sent to the space 66 via the washing water annular passage 65 and the washing water communication passage 64, and is ejected from the ejection hole 71 into the recess 51. It has become.

By rotating the on-off valve 73 to close the washing water supply path 72, the ejection of the washing water from the ejection hole 71 into the recess 51 is prohibited.

Next, the case where the pipe joint 21 having the above structure is connected will be described. Before connecting to each other,
The cleaning water supply path 72 of the housing 61 of the socket 22 is closed by the on-off valve 73. The socket 22 to which the pipe 2 is connected via the adapter 49 is connected to the plug 23 to which the pipe 3 is connected. Here, when connecting the socket 22 to the plug 23, first, the sleeve 53 of the socket 22 is moved toward the rear end of the main cylinder 41 against the urging force of the spring 57, and in this state, the socket 53 22
The main cylindrical body 25 of the plug 23 is fitted into the concave portion 51 of FIG.

In this state, when the movement of the sleeve 53 is released, the sleeve 53 is moved toward the distal end of the main cylinder 41 by the urging force of the spring 57, and the protrusion 55 formed on the inner surface side of the sleeve 53. As a result, the locking ball 59 is pressed inward, and a part thereof is
The plug 23 is engaged with the engagement groove 35 formed on the outer peripheral surface of the main cylindrical body 25 of the plug 23, and a reliable connection between the plug 23 and the socket 22 is ensured. In this manner, the pressing projection 44 formed at the distal end of the valve 43 of the socket 22 comes into contact with the distal end of the valve 27 of the plug 23, and these valves 27 and 43 are pressed together and the springs 32 , 47 against the rear end of the main cylinders 25, 41.

As a result, as shown in FIG. 3, the openings 26a and 42a of the main cylinders 25 and 41 are respectively opened, and the liquid passages 26 and 42 of the main cylinders 25 and 41 are respectively opened.
The flow paths 31 and 46 formed in the valves 27 and 43
It is in a state of being communicated via. Then, by connecting the socket 22 and the plug 23 in this way, the pipe 2 and the pipe 3 are connected via the pipe joint 21 composed of the socket 22 and the plug 23, and the semiconductor high-purity chemical or general Liquids such as chemicals can flow through each other.

The socket 2 connected in this manner is
2 and the plug 23, the socket 22
Of the sleeve 53 provided on the
Is slid toward the rear end of the socket 22.

In this manner, the projection of the locking ball 59 into the concave portion 51 is released, and in this state, the socket 22 and the plug 23 are separated from each other, whereby the socket 2
The connection between the plug 2 and the plug 23 is released. At this time, the valves 43 and 27 of the socket 22 and the plug 23 abut against the valve seats 48 and 33, and the liquid passages 42 and 26 of the socket 22 and the plug 23 are closed.

Here, when the connection between the socket 22 and the plug 23 of the pipe joint 21 is released in this way, the flowing liquid may leak slightly from the connection portion. Then, the leaked liquid is supplied to the socket 22.
When the liquid adheres to the lock mechanism, depending on the type of liquid, the components in the liquid harden or the viscosity of the liquid causes
The lock mechanism may not operate properly. Therefore, before the next connection, the socket 2 having the lock mechanism is required.
At 2, the lock mechanism is cleaned.

Next, the cleaning operation will be described.
When performing the cleaning operation, the on-off valve 73 provided in the housing 61 of the socket 22 is rotated to communicate the cleaning water supply path 72 of the housing 61. In this case, the washing water is sent from the washing water supply source via the washing water supply tube 74, passes through the washing water supply passage 72 of the housing 61, and further passes through the washing water annular passage 65 and the washing water communication passage 64. Into the space 66, and from the ejection hole 71 to the recess 5.
It is jetted into 1.

Here, the ejection hole 71 from which the washing water is ejected.
Are angled in the same direction with respect to the radial direction, so that the cleaning water spouted from each spouting hole 71 is given a rotational force, whereby the same water is formed along the inner surface in the recess 51. It will flow while rotating in the direction. And
The locking ball 59 and the hole 58 constituting the lock mechanism and the peripheral portion thereof are cleaned by the washing water flowing while rotating along the inner surface of the recess 51, and the locking ball 59, the hole 58 and the The residual liquid adhering to the periphery is reliably washed away.

As described above, according to the pipe joint 21 having the cleaning function, since the cleaning mechanism for cleaning the lock mechanism for maintaining the connection state between the socket 22 and the plug 23 is provided, it remains when the connection is released. Even if the liquid adheres to the lock mechanism, it is possible to solve the problem that the adhered liquid hardens or the lock mechanism does not function due to the viscosity of the residual liquid. As a result, the connection state between the socket 22 and the plug 23 can be kept good at any time, and the reliability of the connection can be increased.

The locking mechanism is a one-touch type which connects and disconnects the socket 22 and the plug 23 by moving the locking ball 59 into and out of the recess 51 by sliding the sleeve 53. The connection and disconnection between the lock and the plug 23 can be performed very easily with one touch. In addition, by cleaning the lock mechanism of this structure by the cleaning mechanism, the sliding of the sleeve 53 and the locking ball 59 into the concave portion 51 can be performed. The appearance can always be maintained in a good state, and thereby both the ease of connection and the reliability of connection can be enhanced.

Further, the washing water supplied from the washing water supply source is supplied to the recess 5 from the ejection hole 71 communicating with the space 66.
1 so that the recess 23 into which the plug 23 is fitted is formed.
1 and the locking ball 59 that protrudes into and out of the recess 51 can be reliably cleaned. In particular, a plurality of ejection holes 71 formed at intervals in the circumferential direction are angled in the same direction with respect to the radial direction. Since it is formed, the recess 5
1 can be rotated and flowed along the inner surface of the concave portion 51, and the inner surface of the concave portion 51 and the locking ball 59 that appears and disappears in the concave portion 51 can be more reliably cleaned, and the problem caused by the residual liquid Can be reliably eliminated and high reliability can be secured.

Further, since the ejection hole 71 is provided outside the O-ring 52 which constitutes a seal portion of the flow path communicated by connecting the socket 22 and the plug 23, the socket 22 and the plug 23 When the washing water is supplied and is ejected from the ejection hole 71 while the liquid is flowing by connecting the fluid passages to each other, the washing water may enter the communicated passage. Therefore, it is possible to reliably prevent a problem that the washing water is mixed into the liquid.

Further, by opening / closing the washing water supply passage 72 by means of the opening / closing valve 73 provided in the socket 22, washing water can be reliably supplied to the lock mechanism when necessary to perform the washing operation.

4 omits the on-off valve 73 of the housing 61 and connects the on-off valve 81 to the washing water supply tube 74.
The cleaning water supply tube 7 is thus provided.
By providing the on-off valve 81 on the fourth side, the structure of the socket 22 can be simplified.

According to the pipe fitting 21 having the cleaning function, the on-off valve 8 provided in the cleaning water supply tube 74 is provided.
By opening and closing the flow path of the cleaning water supply tube 81 by 1, the cleaning operation can be performed by reliably supplying the cleaning water to the lock mechanism when necessary. Note that both the open / close valve 73 of the housing 61 and the open / close valve 81 of the cleaning water supply tube 74 may be provided. Further, in the above example, the cleaning water such as high-purity water is used as the cleaning liquid, but the cleaning liquid is not limited to water.

[0048]

As described above, according to the pipe joint having a cleaning function of the present invention, the following effects can be obtained. According to the pipe joint with the cleaning function of the first aspect, since the cleaning mechanism for cleaning the lock mechanism that holds the connection state between the socket and the plug is provided, the liquid remaining when the connection is released adheres to the lock mechanism. However, it is possible to solve the problem that the attached liquid hardens or the lock mechanism does not function due to the viscosity of the remaining liquid. As a result, the connection state of the socket and the plug can always be kept in a good condition, and the reliability of the connection can be improved.

According to the second aspect of the present invention, there is provided a lock mechanism for connecting and disconnecting the socket and the plug by causing the locking ball to protrude and retract from the inner surface of the recess by sliding the sleeve. Because
The connection and disconnection of these sockets and plugs can be performed very easily with a single touch.In addition, by cleaning the lock mechanism of this structure with a cleaning mechanism, the sliding of the sleeve and the appearance of the locking ball in and out of the recess are achieved. It can always be maintained in a good state, thereby improving both the easiness of connection and the reliability of connection.

According to the third aspect of the present invention, since the cleaning liquid sent from the cleaning liquid supply source is jetted into the concave portion from the jetting hole communicating with the space, the inside and the concave portion where the plug is fitted are provided. The locking ball that appears in the interior can be reliably washed, and the problem caused by the residual liquid can be surely eliminated, and high reliability can be secured.

According to the fourth aspect of the present invention, since the ejection holes formed at intervals in the circumferential direction are formed at an angle in the same direction with respect to the radial direction, the ejection holes are formed. The cleaning liquid spouted into the concave portion can be rotated and flowed along the inner surface of the concave portion, so that the inner surface of the concave portion and the locking ball appearing in the concave portion can be more reliably cleaned, and the trouble caused by the residual liquid can be more reliably performed. By solving the problem, high reliability can be secured.

According to the fifth aspect of the present invention, since the ejection hole is provided outside the seal portion of the flow path that is communicated by connecting the socket and the plug, the connection between the socket and the outlet is provided. Even when the cleaning liquid is supplied and is ejected from the ejection hole when the liquid is flowing by connecting the plug and the respective flow paths to communicate with each other, the cleaning liquid does not enter the communicated flow path, Therefore, it is possible to reliably prevent a problem that the cleaning liquid is mixed into the liquid.

According to the pipe joint having the cleaning function of claim 6, the supply path is opened and closed by the on-off valve provided in the socket, so that the cleaning liquid is reliably supplied to the lock mechanism when needed to perform the cleaning operation. It can be performed.

According to the seventh aspect of the present invention, the cleaning liquid supply tube is opened and closed by the on-off valve provided on the cleaning liquid supply tube, so that the cleaning liquid is reliably locked when necessary. To perform cleaning work.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a socket and a plug constituting a pipe joint for explaining a configuration and a structure of a pipe joint with a cleaning function according to an embodiment of the present invention.

FIG. 2 is a plan sectional view of a distal end portion of a socket constituting the pipe joint for explaining a configuration and a structure of the pipe joint with a cleaning function according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view of a socket and a plug constituting the pipe joint for explaining a connection state of the pipe joint with a cleaning function according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view of a socket constituting the pipe joint for explaining another example of the pipe joint with a cleaning function according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Pipe fitting with washing function 22 Socket 23 Plug 35 Engagement groove 51 Depression 51a Wall 52 O-ring (seal part) 53 Sleeve 58 Hole 59 Locking ball 64 Washing water communication path (supply path) 65 Washing water annular path (supply (Path) 66 space part 71 ejection hole 72 cleaning water supply path (supply path) 73, 81 on-off valve 74 cleaning water supply tube

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B116 AA12 AB53 BB23 3B201 AA12 AB53 BB23 BB93 CB01 3H015 FA01 3J106 AA01 AB01 BA01 BB01 BC04 BD01 BE11 BE21 CA01 EA03 EB07 EC02 EC07 ED32 EE01 EF01

Claims (7)

[Claims] 1. A pipe joint having a socket and a plug, wherein the socket and the plug are connected to each other so that flow paths are communicated with each other. And a lock mechanism for holding a connection state of the plug,
A pipe joint with a cleaning function, comprising a cleaning mechanism for supplying a cleaning liquid to the lock mechanism for cleaning. 2. The socket has a recess in which the plug is fitted. The lock mechanism has a hole formed in a wall forming the recess at intervals in a circumferential direction; A locking ball provided in the hole, a part of which can be protruded and retracted into the recess; and a locking ball provided on the outer peripheral side, which is slid in the axial direction to press the locking ball from the outer peripheral side to thereby form the hole. 2. A cleaning function according to claim 1, further comprising a sleeve protruding from the groove into the recess, and maintaining a state of being engaged with an engagement groove formed around the plug fitted into the recess. With pipe fitting. 3. A cleaning liquid supply tube connected to a cleaning liquid supply source for supplying a cleaning liquid to the socket, for supplying the cleaning liquid supplied from the cleaning liquid supply tube to a space formed on the outer peripheral side of the recess. The pipe with a cleaning function according to claim 2, wherein a passage is formed, and a discharge hole for discharging the cleaning liquid fed into the space into the concave portion is formed in a wall portion forming the concave portion. Fittings. 4. A plurality of ejection holes are formed in the recess at intervals in a circumferential direction, and the ejection holes are formed at an angle in the same direction with respect to a radial direction. The pipe fitting with a cleaning function according to claim 3. 5. The cleaning device according to claim 3, wherein the ejection hole is formed outside a seal portion of a flow path communicated by connecting the socket and the plug. Pipe fitting with function. 6. The valve according to claim 3, wherein the socket is provided with an on-off valve for opening and closing the supply path.
The pipe fitting with a cleaning function according to any one of claims 1 to 5. 7. The cleaning function according to claim 3, wherein the cleaning liquid supply tube is provided with an on-off valve for opening and closing a flow path in the cleaning liquid supply tube. Pipe fittings.