One-way flow-limiting pipe joint

Abstract

A one-way flow limiting pipe connector comprises a pipe connector body, a water inlet end arranged on the left side of the pipe connector body and a water outlet end arranged on the right side of the pipe connector body, a rotating part is arranged on the outer wall of the middle of the pipe connector body, and an annular clamping groove is formed in the inner wall of the water outlet end. A non-return seat matched with the clamping groove is arranged in the clamping groove; an annular screwing groove is formed in the inner wall of a notch in the right side of the clamping groove; a limiting end cover matched with the screw joint groove is in screw joint in the screw joint groove, and the limiting end cover presses the non-return seat in the clamping groove; a water through hole is formed in the center of the limiting end cover; a movable hole coaxial with the water through hole is formed in the center of the right end surface of the non-return seat; a plurality of left opening and closing holes communicated with the movable hole are formed in the left end surface of the non-return seat; and an opening and closing piece matched with the movable hole is arranged in the movable hole. The one-way flow limiting pipe connector can achieve one-way flowing of water flow, and effectively avoids the situation of water flow backflow.

Description

Technical Field

[0001] The utility model relates to a pipe joint, in particular to a one-way flow-limiting pipe joint. Background Art

[0002] A pipe joint is a part used to connect pipelines in a hydraulic system or install pipelines on hydraulic components. It can be used to connect two independent pipelines. The inside of a traditional pipe joint is a straight round hole without any structure and is in an unobstructed state. If, during the use of the pipe joint, the water flow in the pipeline connected to the water outlet end of the pipe joint undergoes backflow, the backflowing water can easily pass through the pipe joint and flow back into the pipeline connected to the water inlet end of the pipe joint. Once the water flow backflows, it will not only change the water pressure state, causing damage to the components in the hydraulic system, but also lead to the pollution of the source water flow. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a one-way flow-limiting pipe joint, which can achieve the one-way flow of water and effectively avoid the backflow of water.

[0004] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0005] The utility model discloses a one-way flow-limiting pipe joint, which comprises a pipe joint body, a water inlet end arranged on the left side of the pipe joint body, and a water outlet end arranged on the right side of the pipe joint body. A rotating part is arranged on the outer wall of the middle part of the pipe joint body. An annular clamping groove is arranged on the inner wall of the water outlet end. A check seat matching with the clamping groove is arranged in the clamping groove. An annular screwing groove is arranged on the inner wall of the right side slot opening of the clamping groove. A limiting end cover matching with the screwing groove is screwed in the screwing groove, and the limiting end cover presses the check seat in the clamping groove. A water passing hole is arranged at the center of the limiting end cover. A movable hole coaxial with the water passing hole is arranged at the center of the right end face of the check seat. A plurality of left opening and closing holes communicating with the movable hole are arranged on the left end face of the check seat. An opening and closing part matching with the movable hole is arranged in the movable hole. Symmetric limiting sliding grooves are arranged on the inner walls of the upper and lower sides of the movable hole. Limiting sliding blocks matching with the limiting sliding grooves are arranged on the upper and lower sides of the outer wall of the opening and closing part. A safety rod located in the limiting sliding groove is arranged on the limiting sliding block. A plurality of uniformly distributed right opening and closing holes are arranged on the opening and closing part. The left side side wall of the opening and closing part shields and seals the right end hole opening of the left opening and closing hole, and the bottom of the movable hole shields and seals the left end hole opening of the right opening and closing hole. A left magnet block is arranged at the center of the left end of the check seat. A right magnet block is arranged at the center of the opening and closing part, and the left end magnetic pole of the right magnet block attracts the right end magnetic pole of the left magnet block.

[0006] A left embedding groove is arranged at the center of the left end face of the check seat, and the left magnet block is embedded in the left embedding groove. A right embedding groove coaxial with the left embedding groove is arranged at the center of the right side side wall of the opening and closing part, and the right magnet block is embedded in the right embedding groove.

[0007] A number of perforations coaxial with the left opening and closing hole are provided on the opening and closing member; the diameter of the perforations is smaller than the diameter of the left opening and closing hole; fixing rods matching the perforations are arranged in the perforations; a sealing head located on the left side of the opening and closing member is provided at the left end of the fixing rod, and the sealing head is hemispherical; the sealing head plugs and seals the right end opening of the left opening and closing hole; the right end of the fixing rod penetrates through the perforation to the right and is screwed with a fixing nut that fits against the right side wall of the opening and closing member.

[0008] A sealing sleeve matching the sealing head is sleeved outside the sealing head, and the sealing sleeve is made of rubber; an arc-shaped sealing surface is provided on the surface of the sealing sleeve, and the sealing surface plugs and seals the right end opening of the left opening and closing hole.

[0009] A threaded hole coaxial with the safety rod is provided on the right side wall of the limit slider, and the left end of the safety rod is screwed into the threaded hole; the safety rod is located in the limit chute; a buffer block matching the limit chute is provided in the right slot opening of the limit chute; a limiting block located between the right end face of the check valve seat and the left side wall of the limit end cover extends from the right end of the buffer block; the buffer block and the limiting block are integrally formed and are both made of rubber; there is a moving distance between the right end face of the safety rod and the left end face of the buffer block.

[0010] A buffer sleeve matching the safety rod is sleeved outside the safety rod, and the buffer sleeve is made of rubber.

[0011] A limiting portion that fits against the right end face of the water outlet is provided on the outer wall of the right end of the limit end cover; the diameter of the limiting portion is smaller than the outer diameter of the water outlet.

[0012] The outer wall of the limiting portion is regular hexagon.

[0013] The beneficial effects of the present utility model are:

[0014] Compared with the prior art, the one-way flow-limiting pipe joint adopting the structure of the present utility model can effectively prevent the water flow from flowing back through the opening and closing member. When the water flow is flowing normally, the opening and closing member moves to the right. At this time, both the left opening and closing hole and the right opening and closing hole are fully opened, allowing the water flow to flow normally. When the water flow flows back, the opening and closing member will move to the left and reset under the suction force between the left magnet block and the right magnet block and the pressure of the backflowing water flow. At this time, both the left opening and closing hole and the right opening and closing hole are fully closed, and the backflowing water flow is directly intercepted in the movable hole of the check valve seat and cannot flow towards the water inlet on the left side of the pipe joint body anymore, effectively realizing the one-way flow of the water flow, effectively avoiding the situation that the water pressure is abnormal due to the water flow backflow, which may cause damage to the components in the hydraulic system, and at the same time effectively avoiding the situation that the source water flow is polluted due to the water flow backflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a sectional view of the one-way flow-limiting pipe joint of the present utility model;

[0016] Figure 2 is Figure 1An enlarged view of part A. Detailed implementation mode

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation modes:

[0018] Please refer to Figure 1 、 Figure 2 The utility model provides a one-way current-limiting pipe joint, which includes a pipe joint body 1, a water inlet end 2 provided on the left side of the pipe joint body 1, and a water outlet end 3 provided on the right side of the pipe joint body 1. A rotating part 4 is provided on the outer wall of the middle part of the pipe joint body 1. An annular clamping groove 5 is provided on the inner wall of the water outlet end 3; A check seat 6 matching with the clamping groove 5 is arranged in the clamping groove 5; An annular screwing groove 7 is provided on the inner wall of the right side slot opening of the clamping groove 5; A limiting end cover 8 matching with the screwing groove 7 is screwed in the screwing groove 7, and the limiting end cover 8 presses the check seat 6 in the clamping groove 5; A water passing hole 9 is provided in the center of the limiting end cover 8; A movable hole 10 coaxial with the water passing hole 9 is provided in the center of the right end face of the check seat 6; A plurality of left opening and closing holes 11 communicating with the movable hole 10 are provided on the left end face of the check seat 6; An opening and closing member 12 matching with the movable hole 10 is arranged in the movable hole 10; Symmetric limiting sliding grooves 13 are provided on the inner walls on the upper and lower sides of the movable hole 10; Limiting sliding blocks 14 matching with the limiting sliding grooves 13 are provided on the upper and lower sides of the outer wall of the opening and closing member 12; A safety rod 15 located in the limiting sliding groove 13 is provided on the limiting sliding block 14; A plurality of uniformly distributed right opening and closing holes 16 are provided on the opening and closing member 12; The left side wall of the opening and closing member 12 shields and seals the right end hole opening of the left opening and closing hole 11, and the bottom of the movable hole 10 shields and seals the left end hole opening of the right opening and closing hole 16; A left magnet block 17 is provided at the center of the left end of the check seat 6; A right magnet block 18 is provided at the center of the opening and closing member 12, and the left end magnetic pole of the right magnet block 18 attracts the right end magnetic pole of the left magnet block 17.

[0019] A left embedding groove 19 is provided at the center of the left end face of the check seat 6, and the left magnet block 17 is embedded in the left embedding groove 19; A right embedding groove 20 coaxial with the left embedding groove 19 is provided at the center of the right side wall of the opening and closing member 12, and the right magnet block 18 is embedded in the right embedding groove 20.

[0020] A plurality of through holes 21 coaxial with the left opening and closing holes 11 are provided on the opening and closing member 12; The diameter of the through hole 21 is smaller than the diameter of the left opening and closing hole 11; A fixing rod 22 matching with the through hole 21 is arranged in the through hole 21; A sealing head 23 located on the left side of the opening and closing member 12 is provided at the left end of the fixing rod 22, and the sealing head 23 is hemispherical; The sealing head 23 blocks and seals the right end hole opening of the left opening and closing hole 11; The right end of the fixing rod 22 passes through the through hole to the right and is screwed with a fixing nut 24 attached to the right side wall of the opening and closing member 12.

[0021] A sealing sleeve 25 that matches the sealing head 23 is sleeved outside the sealing head 23, and the sealing sleeve 25 is made of rubber; an arc-shaped sealing surface 26 is provided on the surface of the sealing sleeve 25, and the sealing surface 26 plugs and seals the right end orifice of the left opening and closing hole 11.

[0022] A threaded hole 27 coaxial with the safety lever 15 is provided on the right side wall of the limit slider 14, and the left end of the safety lever 15 is screwed into the threaded hole 27; the safety lever 15 is located in the limit chute 13; a buffer block 28 that matches the limit chute 13 is provided in the right side orifice of the limit chute 13; a limit block 29 extending from the right end of the buffer block 28 is located between the right end face of the check valve seat 6 and the left side wall of the limit end cover 8; the buffer block 28 and the limit block 29 are integrally formed and are both made of rubber; there is a moving distance 30 between the right end face of the safety lever 15 and the left end face of the buffer block 28.

[0023] A buffer sleeve 31 that matches the safety lever 15 is sleeved outside the safety lever 15, and the buffer sleeve 31 is made of rubber.

[0024] A limit portion 32 that fits the right end face of the water outlet end 3 is provided on the outer wall of the right end of the limit end cover 8; the diameter of the limit portion 32 is smaller than the outer diameter of the water outlet end 3.

[0025] The outer wall of the limit portion 32 is regular hexagon.

[0026] The usage method of the utility model is as follows:

[0027] The water inlet end 2 can be used to connect to the water inlet pipeline, the water outlet end 3 can be used to connect to the water outlet pipeline, and the outer wall of the rotating portion 4 is regular hexagon. The rotating portion 4 can be effectively rotated by a wrench, so as to facilitate the quick screwing work of the water inlet end 2 and the water outlet end 3 of the pipe joint through the rotating portion 4.

[0028] When the water flow in the water inlet pipeline enters the water inlet end 2, it will flow to the right and flow towards the water outlet end 3. At this time, the water flow will be blocked by the left end face of the check valve seat 6, and the water flow can only flow into the left opening and closing hole 11 on the left end face of the check valve seat 6. At this moment, the water pressure is greater than the suction force between the right end of the left magnet block 17 and the left end of the right magnet block 18. The water flow entering the left opening and closing hole 11 will press on the left side wall of the opening and closing member 12. After being pressed, the opening and closing member 12 will move to the right along the limit chute 13 through the limit slider 14. As the opening and closing member 12 moves to the right, the distance between the left side wall of the opening and closing member 12 and the bottom of the movable hole 10 becomes larger and larger. The left side wall of the opening and closing member 12 no longer shields and seals the right end orifice of the left opening and closing hole 11, and the bottom of the movable hole 10 no longer shields and seals the left end orifice of the right opening and closing hole 16. The water flow flowing out from the left end orifice of the left opening and closing hole 11 can flow through the right opening and closing hole 16 to the right side of the opening and closing member 12, and finally flow into the water outlet pipeline connected to the water outlet end 3 through the water passing hole 9 in the center of the limit end cover 8 for use.

[0029] If water flow back occurs when delivering water flow to the water outlet pipe connected to the water outlet end 3, the backflowing water flow will push the right side wall of the opening and closing member 12 to the left, realizing the leftward reset of the opening and closing member 12. Eventually, the left side wall of the opening and closing member 12 fits against the bottom of the movable hole 10. The left side wall of the opening and closing member 12 shields and seals the right end orifice of the left opening and closing hole 11, and the bottom of the movable hole 10 shields and seals the left end orifice of the right opening and closing hole 16, thus effectively realizing the simultaneous closing of the left opening and closing hole 11 and the right opening and closing hole 16, effectively intercepting the water flow in the movable hole 10 of the check seat 6 and preventing the water flow from flowing back into the water inlet end 2. The cooperation between the limit slider 14 and the limit chute 13 can ensure that the right opening and closing hole 16 and the left opening and closing hole 11 always remain staggered after the movement of the opening and closing member 12, ensuring the check effect to the greatest extent. The safety lever 15 can limit the rightward movement stroke of the opening and closing member 12, ensuring that the right magnet block 18 and the left magnet block 17 can always remain in the attracting state after the rightward movement of the opening and closing member 12. Once the water pressure changes due to backflow, the suction force between the left magnet block 17 and the right magnet block 18 can make the opening and closing member 12 actively move leftward to reset in the first time, without completely relying on the leftward flowing backflow water flow, thus effectively improving the reset efficiency of the opening and closing member 12, closing the left opening and closing hole 11 and the right opening and closing hole 16 in the first time, and ensuring the anti-backflow efficiency and anti-backflow quality to the greatest extent.

[0030] As can be seen from the above, the utility model can effectively prevent water flow back through the opening and closing member 12. When the water flow is flowing normally, the opening and closing member 12 moves rightward. At this time, both the left opening and closing hole 11 and the right opening and closing hole 16 are fully opened, allowing the water flow to flow normally. When the water flow backflows, the opening and closing member 12 will move leftward to reset under the action of the suction force between the left magnet block 17 and the right magnet block 18 and the pressure of the backflow water flow. At this time, both the left opening and closing hole 11 and the right opening and closing hole 16 are fully closed, and the backflow water flow is directly intercepted in the movable hole 10 of the check seat and cannot flow towards the water inlet end 2 on the left side of the pipe joint body 1, effectively realizing the one-way flow of the water flow, effectively avoiding the situation that the water pressure is abnormal due to water flow back and causing damage to the components in the hydraulic system, and at the same time effectively avoiding the situation that the source water flow is polluted due to water flow back.

[0031] A left embedding groove 19 is provided at the center of the left end face of the check seat 6, and the left magnet block 17 is embedded in the left embedding groove 19. A right embedding groove 20 coaxial with the left embedding groove 19 is provided at the center of the right side wall of the opening and closing member 12, and the right magnet block 18 is embedded in the right embedding groove 20. When the water flow is flowing normally, the water flow flows rightward. Therefore, the normally flowing water flow will impact the left magnet block 17 to the right, thus ensuring the stability of the left magnet block 17 when it is embedded in the left embedding groove 19. When the water flow backflows, the water flow flows leftward. Therefore, the backflowing water flow will impact the right magnet block 18 to the left, thus maintaining the stability of the right magnet block 18 when it is embedded in the right embedding groove 20.

[0032] The closing member 12 is provided with a plurality of through holes 21 coaxial with the left closing hole 11. The diameter of the through holes 21 is smaller than that of the left closing hole 11. A fixing rod 22 matching the through holes 21 is arranged in the through holes 21. A sealing head 23 located on the left side of the closing member 12 is arranged at the left end of the fixing rod 22. The sealing head 23 is hemispherical. The sealing head 23 plugs and seals the right end orifice of the left closing hole 11. The right end of the fixing rod 22 penetrates through the through hole 21 to the right and is screwed with a fixing nut 24 that fits against the right side wall of the closing member 12. This fixing method facilitates the disassembly and assembly of the sealing head 23. Just unscrew the fixing nut 24 from the right end of the fixing rod 22, and the fixing rod 22 can be quickly withdrawn from the through hole 21, so as to realize the quick disassembly of the sealing head 23. The presence of the sealing head 23 can further ensure the sealing performance when the left closing hole 11 is closed.

[0033] A sealing sleeve 25 matching the sealing head 23 is sleeved outside the sealing head 23. The sealing sleeve 25 is made of rubber. The surface of the sealing sleeve 25 has an arc-shaped sealing surface 26. The sealing surface 26 plugs and seals the right end orifice of the left closing hole 11. The presence of the sealing sleeve 25 can further improve the sealing effect of the sealing head 23.

[0034] A threaded hole 27 coaxial with the safety rod 15 is arranged on the right side wall of the limit slider 14. The left end of the safety rod 15 is screwed into the threaded hole 27. This fixing method facilitates the disassembly and assembly of the safety rod 15, thus facilitating the replacement of the safety rod 15.

[0035] The safety rod 15 is located in the limit sliding groove 13. A buffer block 28 matching the limit sliding groove 13 is arranged in the right slot orifice of the limit sliding groove 13. The right end of the buffer block 28 extends out a limit block 29 located between the right end face of the check valve seat 6 and the left side wall of the limit end cover 8. The buffer block 28 and the limit block 29 are integrally formed and are both made of rubber. There is a moving distance 30 between the right end face of the safety rod 15 and the left end face of the buffer block 28. The moving distance 30 is the stroke that the closing member 12 can move to the right. When the safety rod 15 moves to the right by a certain stroke, the right end of the safety rod 15 will directly press on the buffer block 28. At this time, the buffer block 28 will be compressed and deformed to generate elasticity. This elasticity can effectively buffer the pressure on the safety rod 15 and avoid the situation that the safety rod 15 is easily bent due to excessive pressure when the closing member 12 pushes the safety rod 15 to the right.

[0036] A buffer sleeve 31 matching the safety rod 15 is sleeved outside the safety rod 15. The buffer sleeve 31 is made of rubber. When the safety rod 15 is compressed and bent and deformed, the buffer sleeve 31 will deform and generate elasticity accordingly, so as to further buffer the pressure on the safety rod 15 and effectively improve the pressure-bearing capacity of the safety rod 15.

[0037] A limiting part 32 which is in contact with the right end face of the water outlet end 3 is provided on the outer wall of the right end of the limiting end cover 8. The diameter of the limiting part 32 is smaller than the outer diameter of the water outlet end 3. The existence of the limiting part 32 can quickly screw the limiting end cover 8 in place, facilitating the quick installation of the limiting end cover 8.

[0038] The outer wall of the limiting part 32 is in a regular hexagon shape, and a corresponding wrench can be directly clamped on the limiting part 32 to rotate the limiting part 32, thereby facilitating the rotation of the limiting end cover 8 and being conducive to the disassembly and assembly of the limiting end cover 8.

Claims

1. A one-way flow-limiting pipe joint, comprising a pipe joint body, a water inlet end provided on the left side of the pipe joint body, and a water outlet end provided on the right side of the pipe joint body. A rotating part is provided on the outer wall of the middle part of the pipe joint body, and it is characterized in that: An annular clamping groove is provided on the inner wall of the water outlet end; a check valve seat matching the clamping groove is provided in the clamping groove; an annular screwing groove is provided on the inner wall of the right slot opening of the clamping groove; a limiting end cover matching the screwing groove is screwed in the screwing groove, and the limiting end cover presses the check valve seat in the clamping groove; a water passing hole is provided at the center of the limiting end cover; a movable hole coaxial with the water passing hole is provided at the center of the right end face of the check valve seat; a plurality of left opening and closing holes communicating with the movable hole are provided on the left end face of the check valve seat; a closing member matching the movable hole is provided in the movable hole; symmetric limiting sliding grooves are provided on the upper and lower inner walls of the movable hole; limiting sliding blocks matching the limiting sliding grooves are provided on the upper and lower sides of the outer wall of the closing member; a safety rod located in the limiting sliding groove is provided on the limiting sliding block; a plurality of evenly distributed right opening and closing holes are provided on the closing member; the left side wall of the closing member shields and seals the right end hole opening of the left opening and closing hole, and the bottom of the movable hole shields and seals the left end hole opening of the right opening and closing hole; a left magnet block is provided at the center of the left end of the check valve seat; a right magnet block is provided at the center of the closing member, and the left end magnetic pole of the right magnet block attracts the right end magnetic pole of the left magnet block.

2. The one-way current-limiting pipe joint according to claim 1, wherein: A left embedding groove is provided at the center of the left end face of the check valve seat, and the left magnet block is embedded in the left embedding groove; a right embedding groove coaxial with the left embedding groove is provided at the center of the right side wall of the closing member, and the right magnet block is embedded in the right embedding groove.

3. The one-way flow-limiting pipe joint according to claim 1, characterized in that: A plurality of through holes coaxial with the left opening and closing holes are provided on the closing member; the diameter of the through holes is smaller than the diameter of the left opening and closing holes; fixing rods matching the through holes are provided in the through holes; a sealing head located on the left side of the closing member is provided at the left end of the fixing rod, and the sealing head is hemispherical; the sealing head plugs and seals the right end hole opening of the left opening and closing hole; the right end of the fixing rod passes through the through hole to the right and is screwed with a fixing nut fitting the right side wall of the closing member.

4. The one-way flow-limiting pipe joint according to claim 3, characterized in that: A sealing sleeve matching the sealing head is sleeved outside the sealing head, and the sealing sleeve is made of rubber; an arc-shaped sealing surface is provided on the surface of the sealing sleeve, and the sealing surface plugs and seals the right end hole opening of the left opening and closing hole.

5. The one-way flow-limiting pipe joint according to claim 1, characterized in that: A threaded hole coaxial with the safety rod is provided on the right side wall of the limiting sliding block, and the left end of the safety rod is screwed in the threaded hole; the safety rod is located in the limiting sliding groove; a buffer block matching the limiting sliding groove is provided in the right slot opening of the limiting sliding groove; a limiting block located between the right end face of the check valve seat and the left side wall of the limiting end cover extends from the right end of the buffer block; the buffer block and the limiting block are integrally formed and are both made of rubber; a moving distance is provided between the right end face of the safety rod and the left end face of the buffer block.

6. The one-way flow-limiting pipe joint according to claim 5, characterized in that: A buffer sleeve matching the safety rod is sleeved outside the safety rod, and the buffer sleeve is made of rubber.

7. The one-way flow-limiting pipe joint according to claim 1, characterized in that: A limiting portion fitting the right end face of the water outlet end is provided on the outer wall of the right end of the limiting end cover; the diameter of the limiting portion is smaller than the outer diameter of the water outlet end.

8. The one-way flow-limiting pipe joint according to claim 7, characterized in that: The outer wall of the limiting portion is regular hexagon.

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