A pressure test connection device for pneumatic lines

Abstract

The utility model discloses a pressure test connecting device for pneumatic pipeline belongs to pipeline pressure test technical field, including main bush, connecting plug, connecting end, unlocking button, copper bush and breather valve core, be provided with copper bush cavity in main bush, and the side wall of main bush is equipped with button position groove, and button position groove bottom is provided with spring clamping groove, connecting plug includes plug pipe body, and the one end of plug pipe body is provided with the limit clamping ring, and one end of connecting end is equipped with the installation cavity, and unlocking button is correspondingly clamped in button position groove, and its bottom end is connected with return spring, the axial of unlocking button is provided with plug through -hole and is provided with eccentric snap ring in it, and the eccentric snap ring is correspondingly clamped into the limit clamping ring of connecting plug, and copper bush is correspondingly set up in copper bush cavity, and breather valve core one end is connected in copper bush and is connected in the installation cavity through valve core spring in its other end, realize the convenient and efficient disassembly installation of connecting plug and main bush, improve the test efficiency of pipeline test.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline pressure testing technology, and in particular relates to a pressure testing connection device for pneumatic pipelines. Background Technology

[0002] In pneumatic pipeline systems, there are many branch lines. During use, it is necessary to conveniently and repeatedly test a certain point. Current test connectors are not convenient for providing external test pressure display system pressure values, and they cannot effectively guarantee the function of automatic sealing and leak prevention. The whole process requires a lot of disassembly of pipelines, which is inconvenient for on-site operation, debugging, maintenance and testing. There is an urgent need for a pressure testing connection device for pneumatic pipelines to solve the above problems. Utility Model Content

[0003] Technical problem to be solved: In view of the problems existing in the background technology, this utility model provides a pressure testing connection device for pneumatic pipelines, which can quickly and efficiently disassemble and install the connection plug and the main bushing, thereby improving the testing efficiency of pipelines.

[0004] Technical solution: The present invention provides a pressure testing connection device for pneumatic pipelines, the pressure testing connection device comprising: The main bushing has an internal thread area and an insertion interface on its inner circumference at both ends, and a copper bushing cavity is formed in the middle inner circumference of the main bushing; a button slot for connecting the copper bushing cavity is opened on the main bushing near the insertion interface along its radial direction, and a spring retainer slot is provided at the bottom of the button slot on the main bushing. A connector includes a connector tube, one end of which is recessed along its outer circumference to form a limiting retaining ring; the connector achieves radial limiting by engaging the connector of the connector tube with the main bushing. The connecting end has an external thread area at one end that is threaded to the internal thread area, and an installation cavity is provided inside the external thread area at the connecting end. An unlock button is fitted into a corresponding button slot, and a return spring is connected between the bottom of the unlock button and the spring slot. The unlock button has an axially arranged plug through hole for the plug tube to pass through, and an eccentric retaining ring is provided in the plug through hole. The eccentric retaining ring is engaged with the limiting retaining ring of the connector to achieve axial limiting of the connector. The unlock button, through the cooperation of the eccentric retaining ring and the return spring, is used to control the locking and unlocking of the connector. A sealing sleeve is correspondingly disposed at one end of the copper bushing cavity near the button slot. A copper bushing is provided in the copper bushing cavity, with one end of it connected to the sealing sleeve. A vent valve core, one end of which is slidably connected to a copper bushing, and the other end of which is connected to the mounting cavity via a valve core spring; The connector is inserted into the main bushing, with one end of the connector inserted into the copper bushing. The connector presses against the vent valve core to overcome the spring force of the valve core, causing the vent valve core to move away from the copper bushing and connect to the air intake channel; or the vent valve core is inserted into the copper bushing under the action of the valve core spring to achieve automatic closure and prevent gas leakage.

[0005] Preferably, the inner end of the plug tube is necked to form a conical step, and the sealing sleeve forms a flared opening at the end corresponding to the conical step.

[0006] Preferably, a first hexagonal driving block is provided circumferentially at the outer end of the plug tube, and a first connecting screw is provided at the outer end of the plug tube.

[0007] Preferably, the copper bushing includes a bushing body, and a first outer ring groove is formed on the outer circumference of one end of the bushing body at the mounting cavity. A first sealing ring is embedded in the first outer ring groove, and the outer ring of the first sealing ring is interference-fitted with the mounting cavity. The bushing body has a valve core sealing cavity at one end corresponding to the vent valve core, and an inner ring groove is provided at the end of the bushing body away from the vent valve core. A second sealing ring is embedded in the inner ring groove, and the inner circumference of the second sealing ring is interference-fitted with the inner end of the plug tube body.

[0008] Preferably, the vent valve core includes a valve core rod, and an air inlet groove is provided at one end of the valve core rod corresponding to the valve core sealing cavity along its radial direction, and through holes are provided on both sides of the air inlet groove perpendicular to the air inlet groove.

[0009] Preferably, a set of support fins for mounting the valve core spring are provided on the outer periphery of the other end of the valve core rod, and a protrusion with a diameter smaller than the inner diameter of the valve core spring is formed at the outer end of the support fins.

[0010] Preferably, a second hexagonal driving block is provided circumferentially at the outer end of the connecting end, and a second connecting screw is provided at the outer end of the connecting end.

[0011] The present invention also discloses a pneumatic pipeline pressure testing system, including the pressure testing connection device described above.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The pressure testing connection device of this utility model can conveniently provide the pressure value of the external test pressure display system, and can automatically close to prevent leakage when not in use; the device can greatly reduce the workload of disassembling the pipeline system and facilitate on-site operation, debugging, maintenance and testing.

[0013] This invention also has other beneficial effects, which are described in the embodiments section of the specification and will not be repeated here. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the pressure testing connection device of this utility model; Figure 2 for Figure 1 Cross-sectional view of the pressure testing connection device along line AA; Figure 3 for Figure 2 Sectional view of the main bushing along the BB direction; Figure 4 for Figure 2 3D structural diagram of the connector plug; Figure 5 for Figure 4 Cross-sectional view of the central connector plug along the CC direction; Figure 6 for Figure 1 Schematic diagram of the three-dimensional structure of the middle connector end; Figure 7 for Figure 6 Cross-sectional view of the DD section of the connecting end; Figure 8 for Figure 1 A 3D structural diagram of the unlock button in the middle; Figure 9 for Figure 8 The unlock button in the middle is shown in the structural section view of EE. Figure 10 for Figure 2 Schematic diagram of the connection structure between the copper bushing, the vent valve core, and the valve core spring; Figure 11 for Figure 10 Cross-sectional view of the copper bushing, vent valve core, and valve core spring along the FF direction; Figure 12 for Figure 10 Schematic diagram of the three-dimensional structure of the copper bushing; Figure 13 for Figure 12 Cross-sectional view of the GG structure of the copper bushing; Figure 14 for Figure 10 Schematic diagram of the three-dimensional structure of the central vent valve core; Figure 15 for Figure 14 Cross-sectional view of the HH vent valve core structure.

[0015] Reference numerals: 100, pressure test connection device; 1. Main bushing; 11. Internal thread area; 12. Insertion interface; 13. Button slot; 14. Copper bushing cavity; 15. Spring retainer slot; 2. Connecting plug; 21. Plug body; 22. First hexagonal drive block; 23. First connecting screw head; 24. Limiting retaining ring; 25. Conical step; 3. Connecting end; 31. External thread area; 32. Second hexagonal drive block; 33. Second connecting screw head; 34. Mounting cavity; 4. Unlock button; 41. Plug through hole; 42. Eccentric retaining ring; 5. Return spring; 6. Sealing sleeve; 7. Copper bushing; 71. Bushing body; 72. First outer ring groove; 73. First sealing ring; 74. Valve core sealing cavity; 75. Inner ring groove; 76. Second sealing ring; 8. Vent valve core; 81. Valve core rod; 82. Support wing; 83. Inlet groove; 84. Through hole; 85. Third sealing ring; 86. Second outer ring groove; 87. Protruding post; 9. Valve core spring. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings. Figures 1-15 The technical solutions of the embodiments of this utility model are clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0017] Example 1: As Figures 1-10As shown, this utility model discloses a pressure testing connection device for pneumatic pipelines. The pressure testing connection device 100 includes a main bushing 1, a connecting plug 2, a connecting end 3, an unlocking button 4, a sealing sleeve 6, a copper bushing 7, and a vent valve core 8. The inner circumferences of both ends of the main bushing 1 are respectively provided with an internal thread area 11 and a plug interface 12, and a copper bushing cavity 14 is formed in the middle inner circumference of the main bushing 1. A button slot 13 for connecting the copper bushing cavity 14 is opened along its radial direction near the plug interface 12 of the main bushing 1, and a spring retainer slot 15 is provided at the bottom of the button slot 13 of the main bushing 1. The connecting plug 2 includes a plug tube 21, and a limiting retainer ring 24 is formed by a recess along its outer circumference at one end of the plug tube 21. The connecting plug 2 achieves radial limiting by cooperating with the plug interface 12 of the main bushing 1 through the plug tube 21, that is, the outer diameter of the plug tube 21 is adapted to the inner diameter of the plug interface 12 to prevent the connecting plug 2 from excessively shaking in the radial direction. One end of the connecting end 3 is provided with an external thread area 31 that is threaded to the internal thread area 11, and the connecting end 3 is provided with an installation cavity 34 inside the external thread area 31. The unlocking button 4 is correspondingly engaged in the button slot 13, and a reset spring 5 is connected between the bottom end of the unlocking button 4 and the spring slot 15; the unlocking button 4 is axially provided with a plug through hole 41 for the plug tube 21 to pass through, and an eccentric retaining ring 42 is provided in the plug through hole 41. The eccentric retaining ring 42 can be correspondingly engaged with the limiting retaining ring 24 of the connecting plug 2 to realize the axial limitation of the connecting plug 2. The sealing sleeve 6 is correspondingly disposed at one end of the copper bushing cavity 14 near the button slot 13; the copper bushing 7 is correspondingly disposed inside the copper bushing cavity 14, with one end of it abutting the sealing sleeve 6; one end of the vent valve core 8 is slidably connected inside the copper bushing 7, and the other end of it is connected to the mounting cavity 34 through the valve core spring 9; wherein, the connecting plug 2 is inserted into the main bushing 1, so that one end of the connecting plug 2 is inserted into the copper bushing 7, and the connecting plug 2 squeezes the vent valve core 8 to overcome the elastic force of the valve core spring 9, so that the vent valve core 8 moves away from the copper bushing 7 and connects the air intake channel; or the vent valve core 8 is correspondingly inserted into the copper bushing 7 under the action of the valve core spring 9 to achieve automatic closure to prevent gas leakage. This pressure test connection device can conveniently provide the pressure value of the external test pressure display system, and can automatically close to prevent leakage when not in use. When the connector 2 is connected to the main bushing 1, the unlock button 4 is in the raised state under the action of the return spring 5. At this time, the lower side of the eccentric retaining ring 42 is correspondingly engaged in the limiting retaining ring 24 of the connector 2 to achieve axial limiting of the connector 2. When the unlock button 4 is pressed down to overcome the elastic force of the return spring 5, the eccentric retaining ring 42 moves down to release the locking of the limiting retaining ring 24, and the connector 2 can be pulled out to separate and disassemble the connector 2 from the main bushing 1. The unlock button 4, through the cooperation of the eccentric retaining ring 42 and the return spring 5, is used to control the locking and releasing of the connector 2, which can greatly reduce the workload of disassembling the pipeline system and facilitate on-site operation, debugging, maintenance and testing.

[0018] In a preferred embodiment, such as Figures 4-5 As shown, the inner end of the plug tube 21 is narrowed to form a tapered step 25, and the sealing sleeve 6 forms a flared mouth at one end corresponding to the tapered step 25. When the connecting plug 2 and the main bushing 1 are connected, the tapered step 25 at the front end of the plug tube 21 can be inserted into the flared mouth of the sealing sleeve 6, thereby achieving a sealed connection between the connecting plug 2 and the main bushing 1.

[0019] In one specific embodiment, such as Figures 4-5 As shown, a first hexagonal driving block 22 is circumferentially provided at the outer end of the plug tube 21, and a first connecting screw head 23 is provided at the outer end of the plug tube 21. The first connecting screw head 23 can be easily connected to the gas supply line; the first hexagonal driving block 22 can easily clamp and fix the connecting plug 2.

[0020] In a preferred embodiment, such as Figures 12-13 As shown, the copper bushing 7 includes a bushing body 71. A first outer annular groove 72 is formed on the outer circumference of one end of the bushing body 71 located in the mounting cavity 34. A first sealing ring 73 is embedded in the first outer annular groove 72, and the outer ring of the first sealing ring 73 is interference-fitted with the mounting cavity 34. A valve core sealing cavity 74 is provided at the end of the bushing body 71 corresponding to the vent valve core 8. An inner annular groove 75 is provided at the end of the bushing body 71 away from the vent valve core 8. A second sealing ring 76 is embedded in the inner annular groove 75, and the inner circumference of the second sealing ring 76 is interference-fitted with the inner necked section of the plug tube 21. Figure 2 The insertion end of the connector 2 is located in the inner ring groove 75 after being connected in place and is sealed by the second sealing ring 76. The front end of the insertion end can correspondingly abut against and squeeze the vent valve core 8 to move back and overcome the elastic force of the valve core spring 9 so that the vent valve core 8 moves away from the copper bushing 7 and thus connects the air intake channel.

[0021] In a preferred embodiment, such as Figures 10-11 and Figures 14-15 As shown, the vent valve core 8 includes a valve core rod 81. One end of the valve core rod 81, corresponding to the valve core sealing cavity 74, has an air inlet groove 83 radially formed. The two side walls of the air inlet groove 83 have through holes 84 perpendicular to the air inlet groove. When the connector 2 is disconnected from the main bushing 1, the vent valve core 8, under the action of the valve core spring 9, inserts the valve core rod 81 into the valve core sealing cavity 74 of the copper bushing. The air inlet groove 83 and through holes 84 at the front end of the valve core rod 81 are completely blocked by the copper bushing 7, thereby disconnecting the air intake passage and preventing air leakage. When the vent valve core 8 is pushed back by the insertion end of the connector 2, the air inlet groove 83 and through holes 84 at the front end of the valve core rod 81 disengage from the valve core sealing cavity 74, thus connecting the air intake passage.

[0022] In a preferred embodiment, such as Figures 14-15As shown, a set of support fins 82 for mounting the valve core spring 9 is provided on the outer periphery of the other end of the valve core rod 81, and a protrusion 87 with a diameter smaller than the inner diameter of the valve core spring 9 is formed at the outer end of the support fins 82. This structure can improve the stability support of the valve core spring 9. A second outer annular groove 86 is provided at the connection between the valve core rod 81 and the support fins 82, and a third sealing ring 85 is provided in the second outer annular groove 86. When the valve core rod 81 is fully inserted into the valve core sealing cavity 74, the third sealing ring 85 can further play a sealing role.

[0023] In a preferred embodiment, such as Figures 6-7 As shown, a second hexagonal drive block 32 is provided circumferentially at the outer end of the connecting end 3, and a second connecting screw head 33 is provided at the outer end of the connecting end 3. The second connecting screw head 33 can be easily fixedly connected to the pipeline under test, and the second hexagonal drive block 32 can be easily fixed and clamped during installation or disassembly of the connecting end 3.

[0024] Example 2: The present invention also discloses a pneumatic pipeline pressure testing system, including multiple pressure testing connection devices 100 configured according to requirements. The pressure testing connection devices 100 are used for convenient disassembly or connection of the pneumatic pipeline under test and the air supply pipeline.

[0025] The above are preferred embodiments of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A pressure testing connection device for pneumatic pipelines, characterized in that, The pressure test connection device (100) includes: The main bushing (1) has an internal thread area (11) and an insertion interface (12) on the inner circumference of both ends, and a copper bushing cavity (14) is formed in the middle inner circumference of the main bushing (1); a button slot (13) for connecting the copper bushing cavity (14) is provided on the main bushing (1) near the insertion interface (12) along its radial direction, and a spring slot (15) is provided at the bottom of the button slot (13) of the main bushing (1); The connector (2) includes a connector tube (21), and one end of the connector tube (21) is recessed along its outer circumference to form a limiting retaining ring (24); the connector (2) achieves radial limiting by engaging the connector tube (21) with the insertion interface (12) of the main bushing (1); The connecting end (3) has an external thread area (31) that is threadedly connected to the internal thread area (11) at one end, and an installation cavity (34) is provided inside the external thread area (31) at one end of the connecting end (3). Unlock button (4), which is correspondingly snapped into button slot (13), and a return spring (5) is connected between the bottom end of unlock button (4) and spring slot (15); the unlock button (4) is axially provided with plug through hole (41) for plug tube (21) to pass through, and an eccentric retaining ring (42) is provided in plug through hole (41), the eccentric retaining ring (42) is correspondingly snapped into the limiting retaining ring (24) of connecting plug (2) to realize the axial limiting of connecting plug (2); the unlock button (4) cooperates with the return spring (5) through the eccentric retaining ring (42) to control the locking and releasing of connecting plug (2); A sealing sleeve (6) is provided at one end of the copper bushing cavity (14) near the button slot (13); A copper bushing (7) is provided in the copper bushing cavity (14), and one end of the bushing is connected to the sealing sleeve (6). Vent valve core (8), one end of which is slidably connected to the copper bushing (7), and the other end of which is connected to the mounting cavity (34) through the valve core spring (9); Wherein, the connecting plug (2) is inserted into the main bushing (1) and one end of the connecting plug (2) is inserted into the copper bushing (7). The connecting plug (2) squeezes the vent valve core (8) to overcome the elastic force of the valve core spring (9) so that the vent valve core (8) moves away from the copper bushing (7) and connects to the air intake channel; or the vent valve core (8) is inserted into the copper bushing (7) under the action of the valve core spring (9) to achieve automatic closure and prevent gas leakage.

2. The pressure testing connection device for pneumatic pipelines according to claim 1, characterized in that, The inner end of the plug tube (21) is narrowed to form a conical step (25), and the sealing sleeve (6) forms a flared mouth at one end corresponding to the conical step (25).

3. The pressure testing connection device for pneumatic pipelines according to claim 2, characterized in that, The plug tube (21) is provided with a first hexagonal drive block (22) circumferentially at its outer end, and a first connecting screw head (23) is provided at its outer end.

4. The pressure testing connection device for pneumatic pipelines according to claim 2, characterized in that, The copper bushing (7) includes a bushing body (71). The bushing body (71) has a first outer ring groove (72) on the outer circumference of one end of the mounting cavity (34). A first sealing ring (73) is embedded in the first outer ring groove (72). The outer ring of the first sealing ring (73) is interference-fitted with the mounting cavity (34). The bushing body (71) is provided with a valve core sealing cavity (74) at one end corresponding to the vent valve core (8). The bushing body (71) is provided with an inner ring groove (75) at the end away from the vent valve core (8). A second sealing ring (76) is embedded in the inner ring groove (75). The inner circumference of the second sealing ring (76) is interference-fitted with the inner end of the plug tube (21) necking tube.

5. The pressure testing connection device for pneumatic pipelines according to claim 4, characterized in that, The vent valve core (8) includes a valve core rod (81), and an air inlet groove (83) is provided at one end of the valve core rod (81) corresponding to the valve core sealing cavity (74) along its radial direction. The two side walls of the air inlet groove (83) are provided with through holes (84) that are perpendicular to the air inlet groove.

6. The pressure testing connection device for pneumatic pipelines according to claim 5, characterized in that, The valve core rod (81) has a set of support wing plates (82) for mounting the valve core spring (9) on its outer periphery, and a protrusion (87) with a diameter smaller than the inner diameter of the valve core spring (9) is formed at the outer end of the support wing plate (82).

7. The pressure testing connection device for pneumatic pipelines according to claim 1, characterized in that, The outer end of the connecting end (3) is provided with a second hexagonal driving block (32) and the outer end of the connecting end (3) is provided with a second connecting screw (33).

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