JP2013002462A - Pipe coupling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe coupling for restraining a pressure loss of fluid passing through the pipe coupling, in the pipe coupling interconnected by inserting a male member into a female member.SOLUTION: This pipe coupling includes: the male member 30 having a male side cylinder body 31 having a male side valve hole 40 and a male side valve element 41 biased toward the male side valve hole 40; and the female member 10 having a female side cylinder body 11 forming a female side connection 33 for inserting the male side cylinder body 31 on the cylinder end and forming a female side valve hole 20 opening on a bottom surface 13b of the female side connection 33, and a female side valve element 21 biased toward the female side valve hole 20 by forming a shape of blocking up the female side valve hole 20. The male side valve element 41 and the female side valve element 21 are mutually formed of a permanent magnet, and are arranged so that polarity of the male side valve element 41 on the male side valve hole 40 side and polarity of the female side valve element 21 on the female side valve hole 20 side, become the same polarity.

Description

  The present invention relates to a pipe joint that includes a male member and a female member, and is connected to each other when a male member is inserted into the female member so that fluid can flow therethrough.

2. Description of the Related Art Conventionally, for example, a pipe joint disclosed in Patent Document 1 is known as a pipe joint that can be connected to each other by inserting a male member into a female member so that fluid can flow therethrough.
In Patent Document 1, each of a male member and a female member constituting a pipe joint is a valve energized by a coil spring toward a valve seat having a valve hole penetratingly formed inside a substantially cylindrical valve box. The body is arranged. Each valve body of the male member and the female member is formed with a protruding portion that protrudes from the valve hole when the valve hole is closed. When the male member is inserted into the female member, the respective valve bodies of the male member and the female member abut against each other and receive a pressing force against the biasing force of the coil spring from the other valve body. Thereby, each valve body is separated from the valve seat, the valve holes of the male member and the female member communicate with each other, and fluid can flow between the male member and the female member.

JP 2008-106920 A

  However, in the pipe joint of patent document 1, each valve hole is connecting in the state by which the protrusion part of each valve body was penetrated. For this reason, the flow path of the fluid in the valve hole is narrowed by the amount of the projecting portion through which the valve hole is inserted, and a large pressure loss is likely to occur in the fluid passing through the valve hole. Such a problem is a common problem as long as it is a pipe joint that allows fluid to flow by inserting the male member into the female member in which the valve bodies are arranged.

  The present invention has been made in view of the above circumstances, and its purpose is to suppress the pressure loss of the fluid passing through the pipe joint in the pipe joint connected to each other by inserting the male member into the female member. It is to provide a pipe joint.

  The pipe joint according to claim 1, wherein the male side cylindrical body having a male side valve hole at a cylindrical end and a shape for closing the male side valve hole are formed and directed to the male side valve hole in the male side cylindrical body. And a male member having a male valve body biased by a female member, and a female female connecting portion into which the male cylindrical member is inserted is formed at a cylindrical end, and is open to the bottom surface of the female connecting member. A female side cylinder having a side valve hole, and a female side valve body that forms a shape that closes the female side valve hole and is biased toward the female side valve hole in the female side cylinder. In the pipe joint in which the male side valve hole and the female side valve hole communicate with each other by inserting the male side cylindrical body into the female side connecting portion, the male side valve body And the female valve body is formed of permanent magnets, the male valve hole side polarity of the male valve body and the female valve hole side polarity of the female valve body And summarized in that but the same polarity.

  According to the pipe joint of the first aspect, when the male member is inserted into the female member, the female side valve body moves the female side cylinder body through the female side cylinder body by the repulsive force based on the magnetic force of the female side valve body and the male side valve body. The male valve body is displaced away from the side valve hole, and the male valve body is displaced away from the male valve hole in the female cylinder. Thereby, in a state where the male member and the female member are connected to each other, the female side valve body and the male side valve hole communicate with each other without the female side valve body and the male side valve body being inserted into the respective valve holes. It will be. Therefore, since the female valve hole and the male valve hole are not narrowed by the female valve body or the male valve body, the pressure loss of the fluid passing through the pipe joint can be suppressed.

The gist of the pipe joint according to claim 2 is that at least one of the male valve body and the female valve body has a spherical shape.
According to the pipe joint of the second aspect, it is possible to rapidly suppress a change in the flow path area around the spherical valve body. Thereby, the pressure loss of the fluid which passes the circumference | surroundings of a valve body can be suppressed. Therefore, the pressure loss of the fluid passing through the pipe joint can be further suppressed.

  The pipe joint according to claim 3 is characterized in that, in at least one of the male side cylindrical body and the female side cylindrical body, a cross-sectional area of the cylindrical body in a plane orthogonal to the axial direction of the cylindrical body is a valve closing position. The gist of the present invention is that it is larger in the part including the valve body in the valve opening position than the part including the valve body in

  According to the pipe joint of the third aspect, since the flow path area around the valve body at the valve opening position can be increased, the pressure loss of the fluid passing around the valve body can be suppressed. Therefore, the pressure loss of the fluid passing through the pipe joint can be further suppressed.

The gist of the pipe joint according to claim 4 is that at least one of the male side valve body and the female side valve body is urged by an elastic force of an elastic member toward the corresponding valve hole.
According to the pipe joint of claim 4, since the internal structure of the pipe joint is simplified by biasing the valve body with the elastic member, the pressure loss of the fluid passing through the pipe joint is further suppressed. Can do.

  In the pipe joint according to claim 5, at least one of the male side valve body and the female side valve body is urged by a magnetic force with a magnetic body provided near the valve hole toward the corresponding valve hole. It is a summary.

  According to the pipe joint according to claim 5, the valve body is biased toward the corresponding valve hole by an adsorption force based on the magnetic force between the valve body and the magnetic body provided in the vicinity of the corresponding valve hole. Can do. Thereby, in the structure which has an elastic member, in addition to the elastic force by an elastic member, the valve body urged | biased toward a valve hole is urged | biased by the force which added the magnetic force by a magnetic body. And this magnetic force becomes the largest when the valve body is arrange | positioned in the valve closing position. As a result, the valve body in the valve closing position can be urged toward the valve hole with a larger force. Therefore, the fluid can be prevented from leaking from the valve hole. Moreover, in the structure which does not have an elastic member, since the internal structure of a pipe joint is further simplified, the pressure loss of the fluid which passes a pipe joint can further be suppressed.

It is sectional drawing which shows the cross-section of the male member and female member which comprise the pipe joint which concerns on 1st Embodiment of this invention, Comprising: The figure which shows the cross-section of the male member and female member in a non-connecting state. Sectional drawing which shows the cross-section of a male member and a female member in a connection state in 1st Embodiment. It is sectional drawing which shows the cross-sectional structure of the male member which comprises the pipe joint which concerns on 2nd Embodiment of this invention, and a female member, Comprising: The figure which shows the cross-sectional structure of a part of male member and female member in a non-connecting state.

(First embodiment)
Hereinafter, 1st Embodiment of the pipe joint which concerns on this invention is described with reference to FIG.1 and FIG.3. As shown in FIG. 1, the pipe joint in the first embodiment includes a female member 10 and a male member 30, and the male member 30 is connected to the female member 10 by being inserted along the axial direction A. The
(Female member 10)
The female side cylinder 11 of the female member 10 is formed in a substantially cylindrical shape extending along the axial direction A and having both ends opened. A concave female side connecting portion 13 into which the male member 30 is inserted is integrally formed at the lower end of the female side cylindrical body 11. The lower end of the female side connecting portion 13 is expanded outward so that the male member 30 can be easily inserted. An annular seal member 14 is mounted on the inner side surface of the female side connecting portion 13 so as to seal the gap between the female side connecting portion 13 and the male side cylinder 31 by being pressed against the inserted male member 30. ing.

  In the flange portion 15 formed at the upper end of the female side cylindrical body 11, a flange portion 17 of the cylindrical female side connecting portion 16 covers the opening 11a of the female side cylindrical body 11 via a gasket (not shown). So that they are connected. The flange part 17 of the female side connection part 16 is formed in an annular shape, and a cylindrical external connection end 18 extending in the direction opposite to the female side connection part 13 along the axial direction A extends near the center thereof. Has been. An external pipe (not shown) is connected to the external connection end 18. In the female member 10, a female channel 19 is formed by the female cylinder 11 and the inner peripheral surface of the external connection end 18.

  A female-side valve hole 20 constituting the lower end of the female-side flow channel 19 passes through the bottom surface 13 b of the female-side connecting portion 13 along the axial direction A. The female valve hole 20 is a hole narrowed toward the lower side in the axial direction A, and a female valve seat 22 for contacting the female valve body 21 is formed at the lower end of the female valve hole 20. Is formed. The female side valve body 21 is a sphere accommodated in the female side cylinder body 11, and is larger than the inner diameter of the female side valve seat 22 among the inner diameters of the female side cylinder body 11 and other than the female side valve seat 22. It has a diameter smaller than the inner diameter of the part. The female valve body 21 is urged toward the female valve hole 20 in the female cylinder 11 by a coil spring 23 whose upper end is supported by the female connection portion 16. The coil spring 23 is restricted from moving in the direction intersecting the axial direction A by being fitted into an annular restricting portion 25 erected on the female side connecting portion 16. The female valve body 21 is a permanent magnet, and is fixed to the lower end of the coil spring 23 so that the magnetic pole on the female valve hole 20 side is an N pole and the magnetic pole on the external connection end 18 side is an S pole. ing. In FIG. 1, the female valve body 21 is disposed at a valve closing position that is a position in contact with the female valve seat 22 by the elastic force of the coil spring 23.

The inner side surface of the female side valve seat 22 is formed in a hemispherical shape so that the hemispherical surface of the female side valve element 21 on the female side valve hole 20 side is in close contact. The female side valve seat 22 is formed on the female side connecting portion 13 side in the reduced diameter portion 26 in which the inner diameter of the female side cylindrical body 11 is gradually reduced, and is formed in the accommodating portion 27 for accommodating the female side valve body 21. Has been. An inner surface of the female valve seat 22 is brought into pressure contact with the female valve body 21 in the valve closing position, and an annular ring (not shown) that seals between the female valve body 21 and the female valve seat 22 is sealed. A seal member is attached.
(Male member 30)
The male side cylinder 31 of the male member 30 is formed in a multi-stage substantially cylindrical shape extending along the axial direction A and having both ends opened. In the middle of the axial direction A of the male cylindrical body 31, a reduced diameter portion 32 having a diameter smaller than the lower side of the axial direction A is formed, and above the reduced diameter portion 32, the female side connecting portion 13 is formed. A male side connecting portion 33 that is slidable inside is integrally formed.

  In the flange portion 35 formed at the lower end of the male side cylinder 31, a flange portion 37 of the male side connection portion 36 having a cylindrical shape covers the opening 31a of the male side cylinder 31 via a gasket (not shown). So that they are connected. The flange part 37 of the male side connection part 36 is formed in an annular shape, and an external connection end 38 extending in the direction opposite to the male side connection part 33 along the axial direction A is extended near the center thereof. Yes. An external pipe (not shown) is connected to the external connection end 38. In the male member 30, a male side flow path 39 is constituted by the male side cylindrical body 31 and the inner peripheral surface of the external connection end 38.

  A male side valve hole 40 that constitutes the upper end of the male side flow passage 39 passes through the end surface 33 b of the male side connecting portion 33 along the axial direction A. The male side valve hole 40 is a hole narrowed toward the upper side in the axial direction A, and a male side valve seat 42 for contacting the male side valve body 41 is formed at the upper end portion of the male side valve hole 40. Has been. The male valve body 41 is a sphere accommodated inside the male cylinder 31, and is larger than the inner diameter of the male valve seat 42 among the inner diameters of the male cylinder 31 and other than the male valve seat 42. It has a diameter smaller than the inner diameter of the part. The diameter of the male valve body 41 is equal to the diameter of the female valve body 21 described above.

  The male valve body 41 is urged toward the male valve hole 40 by a coil spring 43 whose lower end is supported by the male connection portion 36. The movement of the coil spring 43 in the direction intersecting the axial direction A is restricted by being fitted into an annular restricting part 45 erected on the male side connection part 36. The male valve body 41 is a permanent magnet having the same magnetic amount and weight as the female valve body 21, and the magnetic pole on the male valve hole 40 side is an N pole, and the magnetic pole on the external connection end 38 side is an S pole. It is fixed to the upper end of the coil spring 43 so that In FIG. 1, the male valve body 41 is disposed at a valve closing position that is a position in contact with the male valve seat 42 by the elastic force of the coil spring 43.

The inner side surface of the male valve seat 42 is formed in a hemispherical shape such that the hemispherical surface of the male valve body 41 on the male valve hole 40 side is in close contact. The male side valve seat 42 is formed on the male side connecting portion 33 side in the reduced diameter portion 32 in which the inner diameter of the male side cylindrical body 31 is gradually reduced. An annular surface (not shown) that seals between the male side valve body 41 and the male side valve seat 42 is pressed against the inner side surface of the male side valve seat 42 against the male side valve body 41 in the valve closing position. A seal member is provided.
(Magnetic quantity of female valve element 21 and magnetic quantity of male valve element 41)
When the N pole of the permanent magnet approaches the axial direction A with respect to the female valve body 21 supported by the coil spring 23, the female valve body 21 has a repulsive force based on the magnetic force, so that the female spring valve 21 The female valve hole 20 is gradually separated from the urging force. Similarly, when the N pole of the permanent magnet approaches along the axial direction A with respect to the male valve body 41 supported by the coil spring 43, the male valve body 41 is subjected to a coil spring by a repulsive force based on the magnetic force. It is gradually separated from the male valve hole 40 against the urging force of 43.

Therefore, the spring constants of the coil springs 23 and 43 and the magnetic quantities of the female valve body 21 and the male valve body 41 are set so as to satisfy the following conditions 1 and 2. Hereinafter, the distance between the bottom surface 13b of the female side connecting portion 13 and the seal member 14 is referred to as a minimum separation distance. Further, the distance between the end of the reduced diameter portion 26 on the external connection end 18 side and the bottom surface 13b of the female side connecting portion 13 is defined as the maximum separation distance. Incidentally, the distance between the end of the reduced diameter portion 32 on the side of the external connection end 38 and the end surface 33b of the male side connecting portion 33 is the maximum separation distance.
(Condition 1) The female valve body 21 in close contact with the female valve seat 22 and the male valve body 41 in close contact with the male valve seat 42 are brought closer to each other along the axial direction A, In a state where the distance from the male valve body 41 is closer than the minimum separation distance, the female valve body 21 is separated from the female valve seat 22 and the male valve body 41 is separated from the male valve seat 42.
(Condition 2) The female valve body 21 is separated from the female valve seat 22, the male valve body 41 is separated from the male valve seat 42, and the positions of the female valve body 21 and the male valve body 41 are the same. In a stable state, the distance between the bottom surface 13b of the female side coupling portion 13 and the female side valve body 21 is the maximum separation distance, and the distance between the end surface 33b of the male side coupling portion 33 and the male side valve body 41 is the maximum separation distance. It becomes.

Of the positions that the female valve body 21 can take, the position where the distance between the bottom surface 13b of the female coupling portion 13 and the female valve body 21 is the maximum separation distance is referred to as the valve opening position of the female valve body 21. Of the positions that the male side valve element 41 can take, a position where the distance between the end face 33 b of the male side coupling portion 33 and the male side valve element 41 is the maximum separation distance is referred to as a valve opening position of the male side valve element 41.
(Function)
Next, the effect | action of the pipe joint of the structure mentioned above is demonstrated, referring FIG.1 and FIG.2.

  First, as shown in FIG. 1, the female side connecting portion 13 of the female member 10 and the male side connecting portion 33 of the male member 30 are arranged so as to face each other in the axial direction A. When the female member 10 and the male member 30 are brought close to each other and the male side connecting portion 33 is inserted into the female side connecting portion 13, the male side connecting portion 33 slides in the female side connecting portion 13 and the female side connecting portion 13 is inserted. The bottom surface 13b of the connection part 13 and the end surface 33b of the male side connection part 33 contact | abut.

  In this series of processes, the female side valve element 21 and the male side valve element 41 are opposed to each other with the N poles having the same polarity, so that the repulsive force based on the mutual magnetic force gradually increases. And after the inner surface of the female side connection part 13 and the outer side surface of the male side connection part 33 are sealed by the sealing member 14, the distance of the female side valve body 21 and the male side valve body 41 is more than the minimum separation distance. When it becomes smaller, based on the above condition 1, the female side valve element 21 is separated from the female side valve seat 22 against the biasing force of the coil spring 23 and opens the female side valve hole 20. Similarly, the male valve body 41 is separated from the male valve seat 42 against the biasing force of the coil spring 43 and opens the male valve hole 40. As shown in FIG. 2, the position of the female valve body 21 and the position of the male valve body 41 are stable in a state where the end surface 33 b of the male connection section 33 is inserted to the bottom surface 13 b of the female connection section 13. Then, based on the condition 2, each of the female valve body 21 and the male valve body 41 is disposed at the valve opening position. Thereby, the female side channel 19 and the male side channel 39 communicate with each other through the female side valve hole 20 and the male side valve hole 40, and fluid can be circulated as shown by arrows in FIG.

  On the other hand, when the connection between the female member 10 and the male member 30 is released, the male member 30 is pulled out from the female member 10. In this series of processes, the repulsive force based on the mutual magnetic force of the female side valve body 21 and the male side valve body 41 gradually decreases. When the distance between the female valve body 21 and the male valve body 41 is greater than the minimum separation distance, the female valve body 21 is subjected to the female valve hole by the biasing force of the coil spring 23 based on the above condition 1. The inside of the female cylinder 11 is displaced toward 20. Similarly, the male valve body 41 is displaced in the male cylinder 31 toward the male valve hole 40 by the biasing force of the coil spring 43. At this time, the female side valve element 21 is accommodated in the accommodating part 27 while being guided by the inner peripheral surface of the reduced diameter part 26 whose inner diameter is reduced, and then displaced to the valve closing position of the female side valve element 21. Similarly, the male valve body 41 is displaced to the valve closing position of the male valve body 41 while being guided by the inner peripheral surface of the reduced diameter portion 32 whose inner diameter is reduced. Thereafter, the seal between the inner side surface of the female side connecting portion 13 and the outer side surface of the male side connecting portion 33 is released, and the connection between the female member 10 and the male member 30 is released.

As described above, according to the pipe joint according to the first embodiment, the effects listed below can be obtained.
(1) When the male member 30 is inserted into the female member 10, the female side valve body 21 moves the female side valve body 21 through the female side valve body 31 by the repulsive force based on the magnetic force of the female side valve body 21 and the male side valve body 41. The male valve body 41 is displaced away from the hole 20, and the male valve body 41 is displaced away from the male valve hole 40 in the female cylinder 11. That is, the female valve body 20 and the male valve hole 21 are not inserted into the female valve hole 20 and the male valve body 41 is not inserted into the male valve hole 40. 40 can communicate. Therefore, in the state where the female member 10 and the male member 30 communicate with each other, the female side valve hole 20 and the male side valve hole 40 are not narrowed by the female side valve body 21 and the male side valve body 41. The pressure loss of the fluid passing through the pipe joint can be suppressed.

  (2) Since the female side valve element 21 and the male side valve element 41 have a spherical shape, the flow path area rapidly changes around the female side valve element 21 and the male side valve element 41 at the valve opening position. Can be suppressed. Thereby, the pressure loss of the fluid which passes the circumference | surroundings of the female side valve body 21 and the male side valve body 41 can be suppressed. Therefore, the pressure loss of the fluid passing through the pipe joint can be further suppressed.

  (3) The female side valve body 21 in the valve closing position is accommodated in the accommodating portion 27 on the female side coupling portion 13 side of the reduced diameter portion 26 in the female side cylindrical body 11. On the other hand, the female side valve body 21 in the valve open position is accommodated in the female side cylindrical body 11 on the external connection end 18 side than the reduced diameter portion 26. That is, the female side valve body 21 in which the cross-sectional area of the cylindrical body on the surface orthogonal to the axial direction of the female side cylindrical body 11 is located at the valve opening position rather than the portion including the female side valve body 21 at the valve closing position. It becomes large in the part including.

  Thereby, compared with the case where the internal diameter of the female side cylinder 11 is constant in the axial direction A, the flow path area around the female side valve body 21 in the valve opening position can be increased. The same applies to the male member 30. As a result, the pressure loss of the fluid passing around the female valve body 21 can be suppressed. Therefore, the pressure loss of the fluid passing through the pipe joint can be further suppressed.

  (4) The female valve body 21 that is displaced to the valve closing position is accommodated in the accommodating portion 27 while being guided by the inner peripheral surface of the reduced diameter portion 26. Similarly, the male valve body 41 that is displaced to the valve closing position is accommodated in the male connection portion 33 while being guided by the inner peripheral surface of the reduced diameter portion 32. Thereby, each valve body 21 and 41 can be smoothly displaced to the corresponding valve closing position.

  (5) By urging the female valve body 21 with the coil spring 23 that is an elastic member, the structure inside the female cylinder 11 can be simplified. Similarly, the structure in the male side cylinder 31 can be simplified by urging the male side valve body 41 with the coil spring 43 which is an elastic member. Therefore, the pressure loss of the fluid passing through the pipe joint can be further suppressed.

(Second Embodiment)
Next, 2nd Embodiment of the pipe joint which concerns on this invention is described with reference to FIG. In addition, the pipe joint of 2nd Embodiment has the same main structure as the pipe joint in 1st Embodiment. Therefore, in 2nd Embodiment, a different part from 1st Embodiment is demonstrated in detail, and the detailed description is abbreviate | omitted by attaching | subjecting the same code | symbol about the same structure as 1st Embodiment.
(Female member 10)
In the female member 10 of the second embodiment, an annular female side magnetic body 51 made of a magnetic body such as iron is fixed to the bottom surface 13b of the female side connecting portion 13. A communication hole 52 having a diameter substantially equal to that of the female side valve hole 20 and communicating with the female side valve hole 20 is formed in the central portion of the female side magnetic body 51. That is, in the female member 10 of the second embodiment, the female side valve body 21 has a female side valve hole that has a resultant force of the elastic force of the coil spring 23 and the magnetic force of the female side valve body 21 and the female side magnetic body 51. It acts as an urging force toward 20.
(Male member 30)
In the male member 30 of the second embodiment, the end surface 33b of the male side coupling portion 33 is made of a magnetic material such as iron and has an annular male side magnetic body having an outer diameter smaller than the outer diameter of the male side coupling portion 33. 56 is fixed. A communication hole 57 having a diameter substantially equal to that of the male side valve hole 40 and communicating with the male side valve hole 40 is formed in the central portion of the male side magnetic body 56. That is, in the male member 30 of the second embodiment, the male side valve body 41 has a resultant force of the elastic force of the coil spring 43 and the magnetic force of the male side valve body 41 and the male side magnetic body 56 on the male side valve hole. It acts as a biasing force toward 40.

The spring constants of the coil springs 23 and 43, the magnetic amounts of the female side valve body 21 and the male side valve body 41, and the magnetic quantities of the female side magnetic body 51 and the male side magnetic body 56 are the above-mentioned conditions 1, In addition to 2, the following condition 3 is set.
(Condition 3) In a state where the female member 10 and the male member 30 are connected, these connected states are not released by repulsive force based on the interaction between the female side magnetic body 51 and the male side magnetic body 56.

As described above, according to the pipe joint according to the second embodiment, in addition to the effects described in (1) to (5) described in the first embodiment, the following effects can be obtained. .
(6) The female valve body 21 is biased toward the female valve hole 20 by the magnetic force between the female valve body 21 and the female magnetic body 51 in addition to the elastic force of the coil spring 23. Yes. And this magnetic force becomes the largest when the female side valve body 21 is located in the valve closing position. As a result, the female valve body 21 in the closed position can be pressed against the female valve seat 22 with a larger force corresponding to the magnetic force. Therefore, fluid can be prevented from leaking from the female valve hole 20 in the female member 10 in the unconnected state. Similarly, in the unconnected male member 30, it is possible to prevent fluid from leaking from the male valve hole 40.
(Other embodiments)
In addition, the said embodiment can also be implemented with the following aspects.

  -The structure by which the coil spring 23 was omitted in 2nd Embodiment may be sufficient. At this time, for example, as the female side valve body 21, the female side valve hole 20 side end part and the female side connection part 16 side end part are prevented from being exchanged in the female side tubular body 11. A configuration in which a guide member for guiding the body 21 along the axial direction A is separately provided is preferable. For example, such a guide member can be embodied as a rod member that is disposed in the female cylinder 11 and extends along the axial direction A, and through which the female valve body 21 is inserted. According to such a configuration, since the coil spring 23 is omitted from the female side cylinder 11, the internal structure of the female side cylinder 11 can be simplified. The same applies to the male member 30. Therefore, the pressure loss of the fluid passing through the pipe joint can be further suppressed.

  -In the female member 10 of 2nd Embodiment, the female side magnetic body 51 is arrange | positioned by the bottom face 13b of the female side connection part 13. As shown in FIG. Not only this but the female side magnetic body should just be arrange | positioned in the position where the female side valve seat 22 is pressed by the female side valve body 21 in a valve closing position. An embedded magnetic body may be used.

  -In the male member 30 of 2nd Embodiment, the male side magnetic body 56 is arrange | positioned at the end surface 33b of the male side connection part 33. FIG. Not only this but the male side magnetic body should just be arrange | positioned in the position where the female side valve seat 22 is pressed by the male side valve body 41 in a valve closing position. An annular magnetic body that forms the valve hole 40 may be used.

The elastic member that urges the valve body is not limited to a coil spring, and may be a leaf spring, for example.
The inner diameter of at least one of the female cylinder 11 and the male cylinder 31 may be constant.

  The shapes of the female side valve body 21 and the male side valve body 41 are not limited to the spherical shape. That is, the female-side valve element 21 may have any shape as long as the sealing member disposed in the female-side valve seat 22 is pressed into contact with the female-side valve hole 20 to prevent fluid leakage from the female-side valve hole 20 by being in the closed position. . Further, the male valve body 41 may be in a shape in which the leakage of fluid from the male valve hole 40 is suppressed by being in pressure contact with the seal member disposed in the male valve seat 42 by being in the valve closing position. .

  The weights of the female valve body 21 and the male valve body 41 may be different from each other. When the weight of the female valve body 21 is smaller than the weight of the male valve body 41, the large male valve body 41 is difficult to separate from the male valve hole 40. A configuration in which a restricting portion that restricts displacement of the valve body 21 toward the female side connecting portion 16 is provided in the female side cylindrical body 11 is preferable. Thereby, the male side valve body 41 with a heavy weight is displaced to the male side connection part 36 side so that it may space apart from the female side valve body 21 by which the displacement was controlled by the control part. On the contrary, when the weight of the male side valve body 41 is smaller than the weight of the female side valve body 21, it is difficult for the female side valve body 21 having a large weight to be separated from the female side valve hole 20. A configuration in which a restricting portion that restricts displacement of the side valve body 41 toward the male connection portion 36 is provided in the male cylinder 31 is preferable. Accordingly, the heavy female side valve element 21 is displaced toward the female side connection part 16 so as to be separated from the male side valve element 41 whose displacement is restricted by the restriction part.

  The magnetic amount of the female valve body 21 and the male valve body 41 may be different from each other. When the magnetic amount of the female valve body 21 is smaller than the magnetic amount of the male valve body 41, the male valve body 41 having a large magnetic amount is difficult to be separated from the male valve hole 40. It is preferable to provide the female cylinder 11 with a regulating portion that regulates the displacement of the small female valve body 21 toward the female connecting portion 16. Thereby, the male side valve body 41 with a large magnetic quantity is displaced to the male side connection part 36 side so that it may separate from the female side valve body 21 by which the displacement was controlled by the control part. On the contrary, when the magnetic amount of the male valve body 41 is smaller than the magnetic amount of the female valve body 21, the female valve body 21 having a large magnetic amount is difficult to be separated from the female valve hole 20. It is preferable that the male side tubular body 31 be provided with a restricting portion for restricting displacement of the small amount of the male side valve body 41 toward the male side connecting portion 36 side. Thereby, the female side valve element 21 having a large magnetic amount is displaced toward the female side connection part 16 so as to be separated from the male side valve element 41 whose displacement is restricted by the restriction part.

  Even if the above-described restriction portion is not provided, the biasing force according to the difference in weight and the amount of magnetism between the female valve body 21 and the male valve body 41 is satisfied so that the above conditions 1 and 2 are satisfied. The difference may be provided to the coil springs 23 and 43.

  The magnetic amount of each valve body 21 and 41 and the spring constant of the coil springs 23 and 43 are determined after the seal member 14 is in pressure contact with the male side connecting portion 33 inserted into the female side connecting portion 13. The bodies 21 and 41 may be configured to be separated from the valve holes 20 and 40.

  A ... axial direction, 10 ... female member, 11 ... female side cylindrical body, 11a ... opening, 13 ... female side connecting portion, 13b ... bottom surface, 14 ... sealing member, 15 ... flange portion, 16 ... female side connecting portion, DESCRIPTION OF SYMBOLS 17 ... Flange part, 18 ... External connection end, 19 ... Female side flow path, 20 ... Female side valve hole, 21 ... Female side valve body, 22 ... Female side valve seat, 23 ... Coil spring, 25 ... Restriction part, 26 ... Reduced diameter part, 27 ... Accommodating part, 30 ... Male member, 31 ... Male side cylindrical body, 31a ... Opening part, 32 ... Reduced diameter part, 33 ... Male side connecting part, 33b ... End face, 35 ... Flange part, 36 DESCRIPTION OF SYMBOLS ... Male side connection part, 37 ... Flange part, 38 ... External connection end, 39 ... Male side flow path, 40 ... Male side valve hole, 41 ... Male side valve body, 42 ... Male side valve seat, 43 ... Coil spring, 45 ... restriction part, 51 ... female side magnetic body, 52 ... communication hole, 56 ... male side magnetic body, 57 ... communication hole.

Claims (5)

A male cylinder having a male valve hole at the cylinder end, and a male valve element that forms a shape that closes the male valve hole and is biased toward the male valve hole in the male cylinder; A male member having
A female side connecting part into which the male side connecting part into which the male side connecting part is inserted is formed at the end of the cylinder, and a female side valve hole opening on the bottom surface of the female side connecting part is formed, and the female side valve hole A female member having a female valve body biased toward the female valve hole in the female cylindrical body,
With
In the pipe joint in which the male side valve hole and the female side valve hole communicate with each other by inserting the male side tubular body into the female side connection portion,
The male valve body and the female valve body are formed of permanent magnets,
The pipe joint according to claim 1, wherein the male valve body side polarity in the male side valve body and the female side valve hole side polarity in the female side valve body are the same. The pipe joint according to claim 1, wherein at least one of the male valve body and the female valve body has a spherical shape. In at least one of the male side cylindrical body and the female side cylindrical body, a cross-sectional area of the cylindrical body in a plane orthogonal to the axial direction of the cylindrical body is opened more than a portion including the valve body in the valve closing position. The pipe joint according to claim 2, wherein the pipe joint is large at a part including a valve body at a valve position. The pipe joint according to any one of claims 1 to 3, wherein at least one of the male valve body and the female valve body is urged by an elastic force of an elastic member toward a corresponding valve hole. The at least one of the male side valve body and the female side valve body is urged by a magnetic force with a magnetic body provided in the vicinity of the valve hole toward the corresponding valve hole. The pipe joint according to one item.

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