Clamping anti-leakage pneumatic joint

Abstract

A clamping anti-leakage pneumatic connector comprises a female connector body and a male connector body located on the right side of the female connector body, a left hose connector is arranged at the left end of the female connector body, a right hose connector is arranged at the right end of the male connector body, and a connecting hole communicated with the left hose connector is formed in the center of the right end face of the female connector body. The diameter of the connecting hole is larger than that of the left hose connector; an adjusting pipe communicated with the right hose joint is arranged at the left end of the secondary joint body; the left end of the adjusting pipe penetrates into the connecting hole leftwards and is attached to the bottom of the connecting hole. An annular connector is arranged on the outer wall of the left end of the adjusting pipe; the outer wall of the adjusting pipe is sleeved with a sealing ring attached to the right side wall of the connector, and the sealing ring is made of rubber. The clamping anti-leakage pneumatic connector not only can ensure the stability when the two air supply hoses are connected through the pneumatic connector, but also can effectively avoid the situation of air leakage, and plays an anti-leakage role.

Description

Technical Field

[0001] The utility model relates to the field of pneumatic joints, in particular to a clamped and leak-proof pneumatic joint. Background Art

[0002] A pneumatic connector is a connector installed at the end of an air hose or other device. The pneumatic connector can be divided into a female connector and a sub-connector. When two independent air hoses need to be connected, a female connector and a sub-connector can be respectively set at the ends of the two air hoses, and then the female connector and the sub-connector can be used to achieve the connection between the two air hoses.

[0003] In order to ensure the sealing between the two when the sub-connector is inserted into the female connector, an annular groove is set on the inner wall of the female connector, and then a matching O-ring is set in the annular groove. This structural design will result in the outer wall of the sub-connector using the friction between itself and the inner wall of the O-ring to pull the O-ring when the sub-connector is inserted into the female connector or pulled out of the female connector. At this time, the O-ring is easily pulled out of the annular groove, affecting the sealing effect of the O-ring, and the frequently pulled O-ring is prone to elastic fatigue. When the O-ring is elastically fatigued, the O-ring will become loose. At this time, the existence of the O-ring can no longer guarantee the sealing between the female connector and the sub-connector, resulting in air leakage when the two air supply hoses are connected. Summary of the invention

[0004] The utility model aims to solve the existing technical problem by providing a fixed leak-proof pneumatic joint, which can not only ensure the stability of two air supply hoses when connected through the pneumatic joint, but also effectively avoid air leakage, thereby achieving an air leakage-proof effect.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] The utility model discloses a fixed leak-proof pneumatic joint, comprising a female joint body and a sub-joint body located on the right side of the female joint body, a left hose joint is arranged at the left end of the female joint body, a right hose joint is arranged at the right end of the sub-joint body, a connecting hole which is intersected with the left hose joint is arranged at the center of the right end face of the female joint body, and the diameter of the connecting hole is larger than the inner diameter of the left hose joint; an adjusting tube which is intersected with the right hose joint is arranged at the left end of the sub-joint body; the left end of the adjusting tube is inserted into the connecting hole to the left and fits with the bottom of the connecting hole; an annular connecting head is arranged on the outer wall of the left end of the adjusting tube; the outer wall of the adjusting tube is sleeved with A sealing ring that fits with the right side wall of the connector, and the sealing ring is made of rubber; an annular pressure plate is arranged on the outer sleeve of the adjusting tube, and the left side wall of the pressure plate fits with the right side wall of the sealing ring; an external thread is arranged on the outer wall of the right part of the adjusting tube; the adjusting tube is screwed with an extrusion tube outside itself through the external thread, and the left end face of the extrusion tube fits with the right side wall of the pressure plate; there is a movable gap between the right end face of the extrusion tube and the left end face of the sub-connector body; the outer peripheral surface of the connector, the outer peripheral surface of the sealing ring, and the outer peripheral surface of the pressure plate are all fitted with the inner wall of the connecting hole; a limiting structure matching the connector is arranged on the lower side of the female connector body.

[0007] The limiting structure includes a limiting screw hole provided on the lower surface of the female connector body, the limiting screw hole is located on the right side of the pressure plate; a strip-shaped positioning groove is provided on the inner wall of the lower side of the connecting hole, and the right notch of the positioning groove is located on the right end surface of the female connector body; the upper end hole of the limiting screw hole is located at the bottom of the positioning groove; a positioning block matching the positioning groove is provided on the lower surface of the connector; a sealing block is provided on the lower surface of the sealing ring that fits the right side wall of the positioning block; the sealing block and the sealing ring are integrally formed, and the sealing block is made of rubber; an auxiliary block is provided on the lower surface of the pressure plate that fits the right side wall of the sealing block; the sealing block and the auxiliary block are both located in the positioning groove; a limiting screw matching therewith is threaded in the limiting screw hole; the lower end of the limiting screw passes downwardly out of the limiting screw hole and is provided with a rotating handle; the upper end of the limiting screw passes upward into the positioning groove, the left side wall of the upper end of the limiting screw fits with the right side wall of the auxiliary block, and the upper end face of the limiting screw fits with the outer wall of the extrusion tube.

[0008] The outer edge of the left end of the connector is provided with an introduction cone surface which is narrow on the left and wide on the right.

[0009] The inner wall of the sealing ring is provided with a plurality of evenly distributed positioning blocks; the outer wall of the regulating tube is provided with a plurality of positioning grooves matching the positioning blocks.

[0010] The right end of the extrusion tube is located outside the connecting hole, and the outer wall of the right end of the adjusting tube is provided with a regular hexagonal clamping surface.

[0011] A vent hole communicating with the right hose connector is provided at the center of the left end face of the sub-connector body; an annular screw groove is provided on the inner wall of the left end opening of the vent hole, and the right end of the adjusting tube is screwed into the screw groove through an external thread; a positioning screw hole is provided on the upper outer wall of the adjusting tube; a positioning rod is provided between the right end face of the extrusion tube and the left end face of the sub-connector body, and the lower end of the positioning rod is screwed into the positioning screw hole.

[0012] The right end surface of the regulating tube is in contact with the right groove wall of the screw connection groove; the right groove wall of the screw connection groove is provided with an annular groove; and an O-ring matching with the annular groove is provided in the annular groove.

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

[0014] Compared with the prior art, when the fixed leak-proof pneumatic joint with the structure of the utility model needs to connect the mother joint body and the sub-joint body, it is only necessary to insert the left end of the adjusting tube at the left end of the sub-joint body to the left into the connecting hole on the mother joint body, and then the limiting screw can be used to effectively limit the rightward movement of the connecting head and reset it, so that the connecting head is effectively fixed in the connecting hole, effectively ensuring the stability of the two air supply hoses when they are connected to the sub-joint body through the mother joint body, and the deformation of the sealing ring can be achieved by squeezing the pressure plate through the extrusion tube, so that the outer peripheral surface of the sealing ring is further fitted to the outer wall of the connecting hole, effectively ensuring the sealing effect of the sealing ring, and when gas tries to leak out through the gap between the outer peripheral surface of the connecting head and the inner wall of the connecting hole, it will be blocked by the sealing ring, effectively avoiding leakage and achieving the effect of preventing leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the utility model of the clamped leak-proof pneumatic joint;

[0016] Figure 2 yes Figure 1 An enlarged view of part A. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0018] See also Figure 1 , Figure 2The utility model provides a fixed leak-proof pneumatic joint, comprising a female joint body 1, a sub-joint body 2 located on the right side of the female joint body 1, a left hose joint 3 is provided at the left end of the female joint body 1, and a right hose joint 4 is provided at the right end of the sub-joint body 2. A connecting hole 5 which is intersecting with the left hose joint 3 is provided at the center of the right end face of the female joint body 1, and the diameter of the connecting hole 5 is larger than the inner diameter of the left hose joint 3; an adjusting tube 6 which is intersecting with the right hose joint 4 is provided at the left end of the sub-joint body 2; the left end of the adjusting tube 6 is inserted into the connecting hole 5 to the left and fits with the bottom of the connecting hole 5; an annular connecting head 7 is provided on the outer wall of the left end of the adjusting tube 6; a connecting head 7 which is intersecting with the connecting head is sleeved on the outer wall of the adjusting tube 6 7, the sealing ring 8 is made of rubber; the adjusting tube 6 is covered with a ring-shaped pressing plate 9, and the left side wall of the pressing plate 9 is in contact with the right side wall of the sealing ring 8; the outer wall of the right part of the adjusting tube 6 is provided with an external thread 601; the adjusting tube 6 is screwed with an extrusion tube 10 set outside itself through the external thread 601, and the left end face of the extrusion tube 10 is in contact with the right side wall of the pressing plate 9; there is a movable gap 11 between the right end face of the extrusion tube 10 and the left end face of the sub-connector body 2; the outer peripheral surface of the connector 7, the outer peripheral surface of the sealing ring 8, and the outer peripheral surface of the pressing plate 9 are all in contact with the inner wall of the connecting hole 5; the lower side of the female connector body 1 is provided with a limiting structure matching the connector 7.

[0019] The limiting structure includes a limiting screw hole 12 provided on the lower surface of the female connector body 1, and the limiting screw hole 12 is located on the right side of the pressure plate 9; a strip-shaped positioning groove 13 is provided on the lower inner wall of the connecting hole 5, and the right notch of the positioning groove 13 is located on the right end surface of the female connector body 1; the upper end opening of the limiting screw hole 12 is located at the bottom of the positioning groove 13; a positioning block 701 matching the positioning groove 13 is provided on the lower surface of the connector 7; a sealing block 801 is provided on the lower surface of the sealing ring 8 that fits the right side wall of the positioning block 701; the sealing block 801 is integrally formed with the sealing ring 8, and the sealing block 8 01 is made of rubber; the lower surface of the pressure plate 9 is provided with an auxiliary block 901 which fits with the right side wall of the sealing block 801; the sealing block 801 and the auxiliary block 901 are both located in the positioning groove 13; a matching limiting screw 14 is threaded in the limiting screw hole 12; the lower end of the limiting screw 14 passes downward to the outside of the limiting screw hole 12 and is provided with a rotary handle 15; the upper end of the limiting screw 14 passes upward into the positioning groove 13, the left side wall of the upper end of the limiting screw 14 fits with the right side wall of the auxiliary block 901, and the upper end face of the limiting screw 14 fits with the outer wall of the extrusion tube 10.

[0020] The outer edge of the left end of the connector 7 is provided with an introduction cone 16 which is narrow on the left and wide on the right.

[0021] The inner wall of the sealing ring 8 is provided with a plurality of evenly distributed positioning blocks 17 ; the outer wall of the regulating tube 6 is provided with a plurality of positioning grooves 18 matching with the positioning blocks 17 .

[0022] The right end of the extruded tube 10 is located outside the connecting hole, and the outer wall of the right end of the adjusting tube 6 is provided with a regular hexagonal positioning surface 1001.

[0023] A vent hole 19 is provided at the center of the left end face of the sub-connector body 2 and is connected to the right hose connector 4; an annular screw groove 20 is provided on the inner wall of the left end opening of the vent hole 19, and the right end of the adjusting tube 6 is screwed into the screw groove 20 through an external thread 601; a positioning screw hole 21 is provided on the upper outer wall of the adjusting tube 6; a positioning rod 22 is provided between the right end face of the extrusion tube 10 and the left end face of the sub-connector body 2, and the lower end of the positioning rod 22 is screwed into the positioning screw hole 21.

[0024] The right end surface of the regulating tube 6 is in contact with the right groove wall of the screw groove 20 ; the right groove wall of the screw groove 20 is provided with an annular groove 23 ; an O-ring 24 matching with the annular groove 23 is provided in the annular groove 23 .

[0025] The method of using the utility model is as follows:

[0026] The female connector body 1 can be connected to the corresponding air supply hose through the left hose connector 3, and the sub-connector body 2 can be connected to the corresponding air supply hose through the right hose connector 4. When the female connector body 1 and the sub-connector body 2 exist independently, the two air supply hoses are in an unconnected state. When the two air supply hoses need to be connected, the adjusting tube 6 at the left end of the sub-connector body 2 can be inserted into the connecting hole 5. At this time, the positioning block 701 on the lower surface of the connecting head 7 can be first inserted into the notch on the right side of the positioning groove 13. As the connecting head 7 moves to the left along the trajectory of the connecting hole 5, the positioning block 701 also moves to the left along the trajectory of the positioning groove 13. Finally, the left end face of the connecting head 7 is fitted with the bottom of the connecting hole 5. The presence of the positioning block 701 can effectively limit the rotation of the connecting head 7 and the adjusting tube 6 in the connecting hole 5, thereby avoiding the situation where the outer peripheral surface of the sealing ring 8 and the inner wall of the connecting hole 5 are constantly rubbed against each other due to the rotation of the adjusting tube 6.

[0027] When the connector 7 is inserted into the connecting hole 5 to complete the connection between the female connector body 1 and the sub-connector body 2, the right end of the extruded tube 10 exposed outside the connecting hole 5 can be rotated to make the extruded tube 10 move to the left along the external thread track. When the connector 7 is fixed, as the extruded tube 10 pushes the pressure plate 9 to the left, the sealing ring 8 between the pressure plate 9 and the connector 7 will be squeezed. At this moment, the outer peripheral surface of the sealing ring 8 expands and deforms outwards under the action of the squeezing force, and the outer peripheral surface of the sealing ring 8 further fits tightly with the inner wall of the connecting hole 5, thereby further improving the sealing effect of the sealing ring 8. Even if the sealing ring 8 becomes loose due to elastic fatigue, In this case, the sealing ring 8 can also be squeezed by the pressure plate 9 so that the outer circumference of the sealing ring 8 is always in contact with the inner wall of the connecting hole 5, thereby ensuring the sealing effect of the sealing ring 8 at all times; when the sealing ring 8 is squeezed by the connector 7 and the pressure plate 9, the sealing block 801 is squeezed by the positioning block 701 and the auxiliary block 901, and the outer wall of the squeezed sealing block 801 is tightly fitted with the inner wall of the positioning groove 13, thereby effectively ensuring the sealing effect of the sealing block 801 on the positioning groove 13; when the female connector body 1 and the sub-connector body 2 are not connected, the upper end of the limiting screw 14 is in the limiting screw hole 12, which will not affect the movement of the positioning block 701, the sealing block 801 and the auxiliary block 901 in the positioning groove 13.

[0028] When the connection between the connecting head 7 and the connecting hole 5 is completed, the limiting screw 14 can be rotated by the rotating handle 15 to make the limiting screw 14 move upward along the threaded trajectory of the inner wall of the limiting screw hole 12. At this time, the upper end of the limiting screw 14 enters the positioning groove 13. When the left side wall of the upper end of the limiting screw 14 is in contact with the right side wall of the auxiliary block 901, the limiting screw 14 can effectively limit the right movement of the positioning block 701, thereby limiting the right movement of the connecting head 7, and firmly fixes the connecting head 7 in the connecting hole 5 to prevent the connecting head 7 from being separated from the connecting hole 5 due to the influence of air pressure when the female connector body 1 is connected to the sub-connector body 2. When the upper end face of the limiting screw 14 is in contact with the extrusion tube 10, the limiting screw 14 can be further rotated upward to make the limiting screw 14 pressed tightly against the outer wall of the extrusion tube 10, effectively ensuring the stability of the extrusion tube 10 after the displacement is completed, thereby ensuring the stability of the sealing ring 8 squeezed by the pressing plate 9 when sealing.

[0029] From the above, it can be known that when the utility model needs to connect the female connector body 1 and the sub-connector body 2, it is only necessary to insert the left end of the adjusting tube 6 at the left end of the sub-connector body 2 to the left into the connecting hole 5 on the female connector body 1, and then the limiting screw 14 can be used to effectively limit the rightward movement of the connecting head 7 and reset it, so that the connecting head 7 is effectively fixed in the connecting hole 5, effectively ensuring the stability of the two air supply hoses when they are connected to the sub-connector body 2 through the female connector body 1, and the sealing ring 8 can be deformed by squeezing the pressure plate 9 by the extrusion tube 10, so that the outer peripheral surface of the sealing ring 8 is further fitted to the outer wall of the connecting hole 5, effectively ensuring the sealing effect of the sealing ring 8, and when gas tries to leak out through the gap between the outer peripheral surface of the connecting head 7 and the inner wall of the connecting hole 5, it will be blocked by the sealing ring 8, effectively avoiding leakage and achieving the effect of preventing leakage.

[0030] The outer edge of the left end of the connector 7 is provided with an introduction cone 16 which is narrow on the left and wide on the right. The existence of the introduction cone 16 facilitates the left end of the connector 7 to be quickly inserted into the connecting hole 5, further improving the connection efficiency between the female connector body 1 and the sub-connector body 2.

[0031] The inner wall of the sealing ring 8 is provided with a plurality of evenly distributed locking blocks 17, and the outer wall of the adjusting tube 6 is provided with a plurality of locking grooves 18 matching the locking blocks 17. The cooperation between the locking blocks 17 and the locking grooves 18 can effectively prevent the sealing ring 8 from rotating around the adjusting tube 6, thereby ensuring the stability of the sealing ring 8 when it enters the connecting hole 5 along with the connecting head 7, and preventing the inner wall of the connecting hole 5 from pulling the sealing ring 8 through the friction between itself and the outer peripheral surface of the sealing ring 8, causing the sealing ring 8 to fold.

[0032] The right end of the extruded tube 10 is located outside the connecting hole 5, and the outer wall of the right end of the adjusting tube 6 is provided with a regular hexagonal locking surface 1001. The existence of the locking surface 1001 makes it easy to use a wrench to lock the right end of the extruded tube 10, so that the extruded tube 10 can be easily rotated by the wrench.

[0033] A vent hole 19 that is connected to the right hose connector 4 is provided at the center of the left end face of the sub-connector body 2, and an annular screw groove 20 is provided on the inner wall of the left end opening of the vent hole 19. The right end of the adjusting tube 6 is screwed into the screw groove 20 through an external thread 601, and a positioning screw hole 21 is provided on the upper outer wall of the adjusting tube 6. A positioning rod 22 is provided between the right end face of the extrusion tube 10 and the left end face of the sub-connector body 2, and the lower end of the positioning rod 22 is screwed into the positioning screw hole 21. This fixing method of the right end of the adjusting tube 6 facilitates the disassembly and assembly of the adjusting tube 6, thereby facilitating the disassembly and assembly of the extrusion tube 10. When the positioning rod 22 is held, the adjusting tube 6 is restricted and cannot rotate. Therefore, when the right end of the extrusion tube 10 is rotated by a wrench, the rotation of the adjusting tube 6 can be limited by the positioning rod 22, which facilitates the stable rotation of the extrusion tube 10.

[0034] The right end face of the adjusting tube 6 fits with the right side groove wall of the screw groove 20. The right side groove wall of the screw groove 20 is provided with an annular groove 23. An O-ring 24 matching it is provided in the annular groove 23. The presence of the O-ring 24 can effectively adjust the sealing between the right end face of the tube 6 and the right side groove wall of the screw groove 20 to avoid air leakage.

Claims

1. A leak-proof pneumatic joint, comprising a female joint body, a sub-joint body located on the right side of the female joint body, a left hose joint being provided at the left end of the female joint body, and a right hose joint being provided at the right end of the sub-joint body, characterized in that: A connecting hole interpenetrating with the left hose connector is provided at the center of the right end face of the female connector body, and the diameter of the connecting hole is larger than the inner diameter of the left hose connector; an adjusting tube interpenetrating with the right hose connector is provided at the left end of the sub-connector body; the left end of the adjusting tube is inserted into the connecting hole to the left and fits with the bottom of the connecting hole; an annular connector is provided on the outer wall of the left end of the adjusting tube; a sealing ring is sleeved on the outer wall of the adjusting tube and fits with the right side wall of the connector, and the sealing ring is made of rubber; an annular pressing plate is sleeved on the outer sleeve of the adjusting tube, and the left side wall of the pressing plate fits with the right side wall of the sealing ring; an external thread is provided on the outer wall of the right part of the adjusting tube; the adjusting tube is screwed with an extrusion tube set outside itself through the external thread, and the left end face of the extrusion tube fits with the right side wall of the pressing plate; there is a movable gap between the right end face of the extrusion tube and the left end face of the sub-connector body; the outer peripheral surface of the connector, the outer peripheral surface of the sealing ring, and the outer peripheral surface of the pressing plate are all fit with the inner wall of the connecting hole; a limiting structure matching the connector is provided on the lower side of the female connector body.

2. A fixed leak-proof pneumatic joint according to claim 1, characterized in that: The limiting structure includes a limiting screw hole provided on the lower surface of the female connector body, the limiting screw hole is located on the right side of the pressure plate; a strip-shaped positioning groove is provided on the inner wall of the lower side of the connecting hole, and the right notch of the positioning groove is located on the right end surface of the female connector body; the upper end hole of the limiting screw hole is located at the bottom of the positioning groove; a positioning block matching the positioning groove is provided on the lower surface of the connector; a sealing block is provided on the lower surface of the sealing ring that fits the right side wall of the positioning block; the sealing block and the sealing ring are integrally formed, and the sealing block is made of rubber; an auxiliary block is provided on the lower surface of the pressure plate that fits the right side wall of the sealing block; the sealing block and the auxiliary block are both located in the positioning groove; a limiting screw matching therewith is threaded in the limiting screw hole; the lower end of the limiting screw passes downwardly out of the limiting screw hole and is provided with a rotating handle; the upper end of the limiting screw passes upward into the positioning groove, the left side wall of the upper end of the limiting screw fits with the right side wall of the auxiliary block, and the upper end face of the limiting screw fits with the outer wall of the extrusion tube.

3. A fixed leak-proof pneumatic joint according to claim 1, characterized in that: The outer edge of the left end of the connector is provided with an introduction cone surface which is narrow on the left and wide on the right.

4. The fixed leak-proof pneumatic joint according to claim 1, characterized in that: The inner wall of the sealing ring is provided with a plurality of evenly distributed positioning blocks; the outer wall of the regulating tube is provided with a plurality of positioning grooves matching the positioning blocks.

5. The fixed leak-proof pneumatic joint according to claim 1, characterized in that: The right end of the extrusion tube is located outside the connecting hole, and the outer wall of the right end of the adjusting tube is provided with a regular hexagonal clamping surface.

6. A fixed leak-proof pneumatic joint according to claim 5, characterized in that: A vent hole communicating with the right hose connector is provided at the center of the left end face of the sub-connector body; an annular screw groove is provided on the inner wall of the left end opening of the vent hole, and the right end of the adjusting tube is screwed into the screw groove through an external thread; a positioning screw hole is provided on the upper outer wall of the adjusting tube; a positioning rod is provided between the right end face of the extrusion tube and the left end face of the sub-connector body, and the lower end of the positioning rod is screwed into the positioning screw hole.

7. A fixed leak-proof pneumatic joint according to claim 6, characterized in that: The right end surface of the regulating tube is in contact with the right groove wall of the screw connection groove; the right groove wall of the screw connection groove is provided with an annular groove; and an O-ring matching with the annular groove is provided in the annular groove.

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