JP5056074B2 - Automatic fitting / removal structure for pipe fittings - Google Patents

Description

  The present invention relates to a pipe joint automatic attachment / detachment structure, and more particularly, to a pipe joint automatic attachment / detachment capable of reducing the separation force acting on the pipe joint even when the pipe fluid pressure is high, thereby making the structure compact. Concerning structure.

Conventionally, an automatic attachment / detachment device has been used in which each of a pair of couplings of piping such as hydraulic equipment is held on a holding plate, and these holding plates are moved close to and away from each other by an operating rod to couple and separate the couplings ( For example, see Patent Documents 1 and 2). However, the automatic attachment / detachment structure of the pipe joint by the conventional automatic attachment / detachment apparatus increases the separation force for separating the couplings when the fluid pressure in the pipe increases, and the couplings are coupled to counter this. In order to press and hold in such a direction, the hydraulic cylinder that drives the operating rod of the automatic attachment / detachment device has become larger, and the holding plate has to be heavy. For this reason, as the fluid pressure of the pipe increases, the automatic fitting / removal structure of the pipe joint becomes larger and it is difficult to make it compact.
Japanese Patent Laid-Open No. 9-100101 JP-A-9-273661

  An object of the present invention is to provide an automatic attachment / detachment structure for a pipe joint that can reduce the separation force acting on the pipe joint even when the fluid pressure of the pipe is high, and can have a compact structure.

In order to achieve the above object, the pipe joint automatic attachment / detachment structure of the present invention has a pair of pipe couplings and one holding plate to which one coupling of the pair of couplings is fixed to the other coupling. An automatic attachment / detachment structure of a pipe joint provided with an automatic attachment / detachment device that couples and separates couplings by moving to and away from the other holding plate by an operating rod, wherein the pipe has a fluid pressure of 10 MPa or more and 35 MPa or less. a hydraulic pipe, said pair of coupling, has a movable valve for opening and closing the flow path and moved forward and backward relative to the coupling end in the interior of each of the coupling body, the flow path on the back of the movable valve train independent spaces to form, balanced couplings der provided with a sealing ring to prevent ingress of fluid flowing through the flow path in the space and is, the operation b The shaft is driven by a pneumatic cylinder or an electric motor, and an axial center adjustment mechanism is installed between the one holding plate and the operating rod. The positioning head is composed of an adjustment spring and a single axis adjustment spring that is erected in the vertical direction at a position between the axis adjustment springs, and is fixed to one holding plate by the axis adjustment mechanism. Is adjusted to the center of a positioning hole provided in the other holding plate, and the one coupling is fixed to one holding plate at a position farther from the positioning rod than the positioning head. It is characterized by having been configured .

  According to the automatic attachment / detachment structure for a pipe joint of the present invention, the operating rod of the automatic attachment / detachment device is configured such that one holding plate fixing one coupling of a pair of couplings is fixed to the other holding plate fixing the other coupling. And a structure for coupling and separating the couplings by moving them closer to and away from each other, and moving the pair of couplings forward and backward with respect to the coupling end inside each coupling body to open and close the flow path. Since there is a valve, a space independent of the flow path is formed on the back surface of the movable valve, and the balance type coupling is provided with a seal ring that prevents the fluid flowing through the flow path from entering the space. The fluid flowing in the pipe does not contact the back of each movable valve, and fluid pressure does not act on the back of the movable valve in the pipe axis direction.

  Thereby, even when the fluid pressure due to the fluid flowing in the pipe becomes high, there is almost no influence on each movable valve, almost no separation force for separating the couplings from each other is generated, or This separation force is greatly reduced. For this reason, it is not necessary to increase the pressing force for coupling and maintaining the coupling state between the couplings, and it is possible to reduce the size of the automatic attachment / detachment device that generates the pressing force even when the fluid pressure of the pipe is high. It is not necessary to make the holding plate thick, and the entire apparatus can be made compact.

  Hereinafter, the automatic attachment / detachment structure of a pipe joint of the present invention will be described based on the embodiments shown in the drawings.

  As illustrated in FIGS. 1 to 3, the pipe joint automatic attachment / detachment structure of the present invention includes a plurality of pairs of couplings (joints) 12, 21 of the pipe 31, and the plurality of pairs of couplings 12, 21. Each female coupling 12 of 21 is fixed to one holding plate 2a, and each male coupling 21 which makes a pair is fixed to the other holding plate 2b. The other holding plate 2b is fixed to a hydraulic device or the like that is operated by the fluid pressure flowing through the pipe 31, and has two positioning holes 3 and 3 at a lower position where a plurality of male couplings 21 are attached. The positioning holes 3 and 3 are formed in a bell mouth shape whose diameter increases toward the one holding plate 2a.

  One holding plate 2 a is attached to the automatic attachment / detachment device 1, and is connected to an operating rod 10 of an actuator 9 fixed to the frame 5 via a connecting member 8. Two positioning heads 4, 4 are fixed to the side of the one holding plate 2 a facing the other holding plate 2 b, and the positioning heads 4, 4, the connecting member 8, and the one holding plate 2 a are integrally operated. The rod 10 is configured to move toward and away from the other holding plate 2b by moving forward and backward. The actuator 9 uses an air cylinder 11.

  In addition, an axis adjustment mechanism 6 is installed between one holding plate 2a and the operating rod 10. The shaft center adjusting mechanism 6 includes two shaft center adjusting springs 7a and 7b arranged in the horizontal direction and facing each other, and a single shaft erected in the vertical direction at a position below the shaft center adjusting springs 7a and 7b. The center adjustment spring 7c is used. The connecting member 8 that moves close to and away from the other holding plate 2b is held by the respective axis adjusting springs 7a, 7b, and 7c of the axis adjusting mechanism 6 so that the axes of the positioning heads 4 and 4 are in a predetermined position. It has come to be adjusted.

  When the female coupling 12 and the male coupling 21 are coupled, the operating rod 10 is moved forward so that the positioning heads 4, 4, the connecting member 8 and one holding plate 2a are integrated with the other holding plate 2b. Move close together. Here, the axis of each positioning head 4, 4 is adjusted to the center of the corresponding positioning hole 3, 3 provided in the other holding plate 2 b by the axis adjusting mechanism 6, and the opening end is bell-mouth shaped. It is guided in the positioning holes 3 and 3 formed in the above and smoothly inserted. As a result, the female coupling 12 and the male coupling 21 are accurately coupled, and then the coupled state is maintained by a predetermined pressing force. When the female coupling 12 and the male coupling 21 are separated, the operating rod 10 is moved backward.

  As illustrated in FIG. 4, in the female coupling 12, a rod-like projecting body 15 is fixed with a nut 14 inside a female coupling body 13 in which two members are combined. Between the inner peripheral surface of the coupling body 13, there is a movable valve 16 that is externally attached to the projecting body 15 and is urged by a female spring 18 to move forward and backward toward the coupling end. Further, the space 17 on the back surface of the movable valve 16 in which the female spring 18 is disposed communicates with the outside air through a communication hole 20 provided in the female coupling body 13. If a clearance is provided between the disc-shaped protruding outer peripheral surface of the movable valve 16 and the inner peripheral surface of the female coupling body 13 so that the space 17 on the back surface of the movable valve 16 communicates with the outside air, the communication hole 20 is formed. It can be omitted.

  In the separated state where the female coupling 12 and the male coupling 21 are not coupled, the female spring 18 urges the movable valve 16 so that the distal end portion 16a of the projecting body 15 is expanded. While making it contact | abut to the valve seat part of a back via the seal ring S2, the outer peripheral surface of the movable valve 16 and the seal ring S1 provided in the inner peripheral surface of the female coupling body 13 closely_contact | adhere, and the flow path 19 and the space 17 And the space 17 is made independent of the flow path 19, the flow path 19 formed between the protrusion 15 and the movable valve 16 is closed, and the fluid flowing through the pipe enters the space 17. It has a structure that prevents it. This prevents fluid pressure from acting on the back surface of the movable valve 16 in the direction of the pipe axis.

  The male coupling 21 is urged by a male spring 29 inside a male coupling body 22 composed of two members which are combined with each other by providing a seal ring S7 on the contact surface, and moves forward and backward toward the coupling end. A poppet valve 26 is provided. A space 28 on the back surface of the poppet valve 26 in which the male spring 29 is disposed communicates with the outside air through communication holes 24 and 25 provided in the male coupling body 22.

  In the separated state in which the female coupling 12 and the male coupling 21 are not coupled, the male spring 29 urges the poppet valve 26 so that its tip 27 is located on the rear surface of the male coupling body 22 with a reduced diameter. The flow path 30 and the space 28 are brought into contact with the valve seat portion through the seal ring S4 and the inner peripheral surface of the poppet valve 26 and the seal ring S6 provided on the male coupling body 22 in contact with the inner peripheral surface. , The space 28 is made independent of the flow path 30, the flow path 30 formed between the male coupling body 22 and the poppet valve 26 is closed, and the fluid flowing through the pipe enters the space 28. It has a structure that prevents it. As a result, no fluid pressure acts on the back surface of the poppet valve 26 in the direction of the pipe axis.

  In the process of coupling the female coupling 12 and the male coupling 21, as illustrated in FIG. 5, the protruding body 15 of the female coupling 12 enters the inside of the male coupling 21, and the male spring 29 and the female coupling are inserted. The side spring 18 does not expand and contract, and the tip of the projecting body 15 fits into the recess of the tip of the poppet valve 26 and comes into close contact with the seal ring S5, so that the opposing surfaces of the projecting body 15 and the poppet valve 26 come into contact with each other. . Further, the outer peripheral surface of the movable valve 16 and the seal ring S3 provided on the inner peripheral surface of the male coupling body 22 are in close contact with each other.

  In this coupling process, the relative position between the movable valve 16 and the female coupling body 13 and the relative position between the poppet valve 26 and the male coupling body 22 do not change, so that a large pressing force for coupling is not required. Further, in the female coupling 12, the flow path 19 remains closed by the movable valve 16, and in the male coupling 21, the flow path 30 remains closed by the poppet valve 26, so that no fluid leaks.

  Next, the forward movement of the actuating rod 10 causes the female coupling 12 to further move toward the male coupling 21 as illustrated in FIG. 6 to couple each other, and the coupled state is maintained with a predetermined pressing force. When the couplings 12 and 21 are coupled, the tip of the projecting body 15 moves the poppet valve 26 backward against the urging force of the male spring 29. As a result, the distal end portion 27 of the poppet valve 26 is separated from the valve seat portion on the back surface of the male coupling body 22 whose diameter is reduced, and the flow path 30 is opened.

  The distal end portion 23 of the male coupling body 22 abuts on the disk-shaped portion having an enlarged diameter of the movable valve 16 to move the movable valve 16 backward against the urging force of the female spring 18. As a result, the distal end portion 16 a of the movable valve 16 is separated from the valve seat portion on the back surface of the distal end portion of the projecting body 15 whose diameter is increased, and the flow path 19 is opened.

  As described above, when the couplings 12 and 21 are coupled, the flow paths 19 and 30 are opened while being sealed by the seal rings S3 and S5 between the seal rings S3 and S5 in the pipe axis direction. Thus, the fluid flowing through the pipe 31 flows through the flow paths 19 and 30.

  In a state where the female coupling 12 and the male coupling 21 are coupled, the back surface of the movable valve 16 is separated from the flow path 19 through the communication hole 20 formed in the female coupling body 13 or through the female coupling. Through the gap between the body 13 and the male coupling body 22, it communicates with the outside air and becomes atmospheric pressure. The back surface of the poppet valve 26 is separated from the outside air through the communication holes 24 and 25 formed in the male body 22 independently of the flow path 30. It is in communication and atmospheric pressure.

  The fluid flowing in the pipe does not contact the back surfaces of the movable valve 16 and the poppet valve 26, and the fluid pressure hardly acts on these back surfaces in the pipe axis direction. Therefore, the movable valve 16 and the poppet valve 26 are hardly affected by the fluid pressure flowing through the pipe 31, and even when the fluid pressure is high, the seal rings S3 and S5 have the same diameter (same). If so, a separation force for separating the couplings 12 and 21 from each other hardly occurs. Even when the inner diameters of the sealings S3 and S5 are different, the separation force is greatly reduced. Therefore, it is not necessary to increase the pressing force for maintaining the coupling state between the couplings 12 and 21.

  In order to balance the fluid pressure in the direction of the pipe axis of the movable valve 16 and the poppet valve 26 and reduce the generated separation force, it is preferable to reduce the inner diameter difference between the seal rings S3 and S5. It is preferably 70% or more of the inner diameter of the large-diameter seal ring. Similarly, the inner diameter difference between the seal rings S1 and S3 and the seal rings S5 and S6 is preferably small, and the inner diameter of the small seal ring is preferably 70% or more of the inner diameter of the large seal ring.

Thus, in the present invention, the pressing force for maintaining the coupling between the couplings 12 and 21 is small, and the drive output of the actuator 9 for moving the operating rod 10 forward and backward can be reduced. Further, in order to obtain a large pressing force, can an actuator 9 that has been using a hydraulic drive with a driving source a relatively small output, such as pneumatic or electric motor drive.

  Of course, when the air-driven actuator 9 is used, the air pump and the air cylinder can be downsized, and when the electric motor-driven actuator 9 is used, a small electric motor with a smaller output can be employed.

  Further, as the pressing force for coupling the couplings 12 and 21 to each other is reduced, the force applied to the holding plates 2a and 2b is also reduced, so that the holding plates 2a and 2b can be made thinner and lighter. Become. As described above, the entire automatic attachment / detachment structure of the pipe 31 can be made compact by reducing the size of the actuator 9 and reducing the thickness of the holding plates 2a, 2b. There is no need to provide the female coupling 12 and the male coupling 21 with a lock mechanism for maintaining the mutual coupling state.

In particular, in the case of a hydraulic pipe in which the fluid pressure of the pipe 31 is 10 MPa or more, a separating force generated by coupling the female coupling 12 and the male coupling 21 with a large pressing force using a large hydraulically driven actuator 9. However, by using the structure of the present invention, a remarkably compact automatic detachable structure can be obtained. The upper limit of the fluid pressure of the pipe 31 to which the automatic fitting / detaching structure for a pipe joint of the present invention can be applied is generally 35 MPa .

  In the embodiment, a plurality of pairs of couplings 12 and 21 are coupled and separated by the automatic attachment / detachment device 1, but the number of couplings to be paired is not particularly limited and may be one set.

  The automatic attachment / detachment structure of a pipe joint according to the present invention can be applied to hydraulic piping for construction machinery vehicles, hydraulic piping for steel manufacturing facilities, hydraulic piping for testing automobile engines, and other fluid pressure piping used in various equipment and facilities. it can.

It is a side view which illustrates the automatic attachment / detachment structure of the piping joint of this invention. It is AA sectional drawing of FIG. It is a side view of FIG. It is sectional drawing which illustrates the state before the coupling | bonding of the coupling of FIG. It is sectional drawing which illustrates the state in the middle of couple | bonding the coupling of FIG. It is sectional drawing which illustrates the state which couple | bonded the coupling of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automatic attachment / detachment apparatus 2a, 2b Holding plate 3 Positioning hole 4 Positioning head 5 Frame 6 Axis center adjustment mechanism 7a, 7b, 7c Axis center adjustment spring 8 Connection member 9 Actuator 10 Actuation rod 11 Air cylinder 12 Female coupling 13 Female coupling Body 14 Nut 15 Projection body 16 Movable valve 16a Tip portion 17 Space 18 Female side spring 19 Flow path 20 Communication hole 21 Male coupling 22 Male coupling body 23 Tip portion 24 Communication hole 25 Communication hole 26 Hoppet valve 27 Tip portion 28 Space 29 Male spring 30 Flow path 31 Piping S1 to S7 Seal ring

Claims (3)

A pair of pipe couplings and one holding plate to which one of the pair of couplings is fixed are moved closer to and away from the other holding plate to which the other coupling is fixed by an operating rod. An automatic attachment / detachment structure for a pipe joint provided with an automatic attachment / detachment device for coupling and separating each other, wherein the pipe is a hydraulic pipe having a fluid pressure of 10 MPa or more and 35 MPa or less, and the pair of couplings are connected to respective coupling bodies. And a movable valve that opens and closes the flow path by moving forward and backward with respect to the coupling end, forms a space independent of the flow path on the back surface of the movable valve, and circulates the flow path in the space. balanced couplings der provided with a sealing ring to prevent the ingress of fluid is, the actuating rod driven by a pneumatic cylinder or an electric motor, the one An axial center adjusting mechanism is installed between the holding plate and the actuating rod, and this axial center adjusting mechanism is disposed between two opposing axial center adjusting springs arranged in the horizontal direction and below between the axial center adjusting springs. The center of the positioning head fixed to one holding plate is positioned on the other holding plate by this shaft center adjusting mechanism. An automatic attachment / detachment structure for a pipe joint, which is adjusted to the center of the hole and fixed to one holding plate at a position farther from the positioning head than the positioning head . The automatic attachment / detachment structure for a pipe joint according to claim 1, wherein the operating rod is driven by an electric motor . A plurality of pairs of the pair of couplings, one coupling pair of the plurality of pairs of couplings being held by the one holding plate, and the other pair of couplings being respectively paired with the other coupling; The automatic attachment / detachment structure for a pipe joint according to claim 1 or 2 , which is held by a holding plate.

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