Pipe fitting air tightness detection equipment

Abstract

The application discloses a pipe airtightness detection equipment, and belongs to the technical field of pipe airtightness detection. The pipe airtightness detection equipment comprises a conveying table, a top pressure mechanism and a pressure measuring mechanism, characterized in that the conveying table is internally provided with conveying mechanisms, the conveying mechanisms are connected with moving modules, the moving modules are uniformly distributed and connected on the conveying mechanisms, a transmission pulley is fixedly arranged on the conveying mechanism at the right end, the transmission pulley is connected with a stepping motor, the moving module comprises a tool seat, the upper end of the tool seat is provided with an opening and is integrally arranged in a U-shaped mode, two groups of left-right symmetrical sliding cavities are arranged at the middle end position of the tool seat, a push frame is slidingly connected in each of the two groups of sliding cavities, springs are arranged between the sliding cavities and the push frame, the push frame can abut against a tee pipe on the tool seat, and the middle end part of the push frame abutting against the tee pipe is recessed. The pipe airtightness detection equipment can orderly realize pipe conveying, does not need to replace and adjust the tool seat, and can effectively improve the detection efficiency.

Description

Technical Field

[0001] This application relates to the field of pipe fitting air tightness testing technology, and more specifically, to a pipe fitting air tightness testing device. Background Technology

[0002] Air tightness testing during valve and pipe fitting production is a crucial step in ensuring valve and pipe fitting quality and preventing leaks that could lead to malfunctions during use. However, the automation level in the specimen clamping process is relatively low. For pipe fittings of different sizes, stable placement is required during testing. For example, the upper pipe opening of a tee fitting needs to be sealed during testing. Different sized fixtures are needed to fix the tee fitting during operation. Continuous transfer fixtures are not suitable for comprehensive and continuous testing of large batches of specimens.

[0003] Therefore, a pipe fitting airtightness testing device is needed to solve the above problems. Utility Model Content

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] To address the technical problems mentioned in the background section, some embodiments of this application provide a pipe fitting airtightness testing device, comprising: a transport platform, a pressing mechanism at the right end of the transport platform, pressure measuring mechanisms at both ends of the pressing mechanism, a moving module between the pressing mechanism and the two pressure measuring mechanisms, a transport mechanism inside the transport platform, the transport mechanism being connected to the moving module, a transmission pulley fixedly mounted on the transport mechanism at the right end, the moving module including a fixture base and a plug-in frame, two grooves at the lower end of the fixture base, the plug-in frame being inserted into the grooves, threaded holes communicating with the grooves, a sliding cavity on the plug-in frame, pads fixedly mounted at both ends of the plug-in frame, two sets of symmetrical sliding cavities at the middle position of the fixture base, a spring and a pusher frame inside the sliding cavity, the spring being connected between the sliding cavity and the pusher frame, and the pusher frame being slidably mounted on the sliding cavity.

[0006] Furthermore, the pusher is provided with inclined surfaces at both the upper and lower ends near the tee fitting, and the inclined surfaces can abut against the tee fitting.

[0007] Furthermore, the top pressure mechanism includes a gantry frame connected above the two pressure measuring mechanisms. A telescopic cylinder is installed on the gantry frame. A fixed block is connected to the lower end of the telescopic cylinder. A top sealing plug is installed at the lower end of the fixed block. A threaded rod is fixedly provided at the middle end of the top sealing plug and is threadedly connected and fixed to the fixed block.

[0008] Furthermore, the pressure measuring mechanism includes a fixed frame integrally assembled with a sliding block above the fixed frame. One of the sliding tubes is connected to a vent pipe, and a solenoid valve is installed on the vent pipe. A threaded seat is fixed to the end of the sliding tube near the moving module, and a side sealing plug is threaded onto the threaded seat. A side cylinder is fixed to the other sliding block, and the side cylinder passes through the sliding block and is connected to the sliding tube. A guide frame is fixed to the upper end of the fixed frame, and the guide frame is slidably connected to the sliding block.

[0009] Furthermore, the side of the guide rail is provided with a main slide groove and an auxiliary slide groove. The main slide groove is provided with scale grooves distributed vertically. One end of the sliding block is threaded with a bolt. The bolt passes through the main slide groove. An indicator is sleeved on the outer periphery of the bolt. The indicator slides vertically with the auxiliary slide groove. The indicator can correspond vertically with the scale groove.

[0010] The beneficial effects of this application are as follows:

[0011] 1. By placing the tee fittings to be tested one by one above the moving module, and then moving the moving module, which is connected to the transport mechanism through the upper opening, the fixed block above the tee fitting is sealed above the tee fitting. The two side sealing plugs at the front and rear of the tee fitting are sealed at the front and rear sides, and the airtightness test is completed by inflating, pressurizing, testing and venting, which can effectively improve the testing efficiency.

[0012] 2. The push frame maintains the stability of the internal tee fitting during and after the movement of the moving module, thus preventing the fixed block from abutting the top of the tee fitting. This eliminates the need for subsequent straightening of the tee fitting by the operator. Furthermore, the moving module can automatically straighten tee fittings of different sizes without requiring the replacement of different sized tooling. The sliding block's vertical position at the guide frame can be adjusted via indicators and bolts, thereby preventing deviation between the side seal plug and the tee fitting and indirectly improving work efficiency. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0014] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a pipe fitting airtightness testing device according to this application;

[0017] Figure 2 yes Figure 1 The pressure-pressing mechanism and pressure-measuring mechanism in the embodiment are shown as cross-sectional structural schematic diagrams.

[0018] Figure 3 yes Figure 1 A partially enlarged schematic diagram in the embodiment;

[0019] Figure 4 yes Figure 3 A cross-sectional view of the pusher frame in the embodiment;

[0020] Figure 5 yes Figure 3 An exploded view of the lower part of the mobile module in the embodiment;

[0021] Figure 6 yes Figure 4 A partially enlarged schematic diagram of the sliding cavity in the embodiment;

[0022] Figure 7 yes Figure 1 A partially enlarged schematic diagram of the pressure measuring mechanism in the embodiment;

[0023] Figure 8 yes Figure 7 A partially enlarged schematic diagram of the main slide in the embodiment.

[0024] Figure label:

[0025] 10. Transport platform; 11. Pressing mechanism; 12. Pressure measuring mechanism; 13. Moving module; 14. Transport mechanism; 15. Transmission pulley; 20. Tooling seat; 21. Groove; 22. Plug-in frame; 23. Screw hole; 24. Sliding cavity; 25. Foot pad; 26. Sliding cavity; 27. Spring; 28. Push frame; 29. ​​Inclined surface; 30. Gantry frame; 31. Telescopic cylinder; 32. Fixed block; 33. Top sealing plug; 40. Fixed frame; 41. Sliding block; 42. Sliding tube; 43. Vent pipe; 44. Solenoid valve; 45. Threaded seat; 46. Side sealing plug; 47. Side cylinder; 48. Guide slide; 50. Main slide groove; 51. Auxiliary slide groove; 52. Scale groove; 53. Bolt; 54. Indicator. Detailed Implementation

[0026] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0027] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0028] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0029] It should be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] It should be noted that, in this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0032] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] Reference Figure 1A pipe fitting airtightness testing device includes: a transport platform 10, a top-pressing mechanism 11 at the right end of the transport platform 10, pressure measuring mechanisms 12 at both ends of the top-pressing mechanism 11, a moving module 13 between the top-pressing mechanism 11 and the two pressure measuring mechanisms 12, a transport mechanism 14 inside the transport platform 10, the transport mechanism 14 connected to the moving modules 13, the moving modules 13 evenly distributed on the transport mechanism 14, a transmission pulley 15 fixed on the right end of the transport mechanism 14, a belt drive mechanism connected to the transmission pulley 15 and a power source (stepper motor, not shown in the figure) connected to the transmission pulley 15; by rotating the transmission pulley 15, the transport mechanism 14 is moved as a whole, thereby causing the moving modules 13 connected to the transport mechanism 14 to move towards the top-pressing mechanism 11 and the pressure measuring mechanisms 12. The top-pressing mechanism 11 closes the upper port of the tee fitting from above, and the pressure measuring mechanisms 12 close the front and rear ports of the tee fitting on the front and rear sides. The airtightness of the tee fitting is tested by inflating and deflating the pressure measuring mechanisms 12.

[0034] Reference Figure 2 The top pressure mechanism 11 includes a gantry 30 connected above two pressure measuring mechanisms 12. A telescopic cylinder 31 is installed on the gantry 30. A fixed block 32 is connected to the lower end of the telescopic cylinder 31. A top sealing plug 33 is installed at the lower end of the fixed block 32. A threaded rod is fixed to the middle end of the top sealing plug 33 and threadedly connected to the fixed block 32. When performing airtightness testing on pipe fittings of different diameters, replacement is achieved through the threaded connection between the fixed block 32 and the top sealing plug 33, so that the top sealing plug 33 that matches the pipe fitting diameter is fixed below the fixed block 32. When the telescopic cylinder 31 is working, the fixed block 32 is pushed downward, so that the top sealing plug 33 is inserted into the opening of the pipe fitting to achieve sealing.

[0035] Reference Figure 3 The lower end of the moving module 13 extends forward and backward and is fixedly connected to the chains on the front and rear sides of the transport mechanism 14. The transport mechanism 14 includes a rotating rod that rotates on the transport platform 10 and rotating wheels fixed at the front and rear ends of the rotating rod. Chains are rotatably engaged on the left and right rotating wheels. The moving module 13 moves along the chain movement trajectory of the transport mechanism 14. Multiple moving modules 13 are evenly distributed on the transport mechanism 14. The moving distance of the moving module 13 fixed above the transport mechanism 14 is adjusted by controlling the rotation of the transmission pulley 15. Thus, after the previous moving module 13 moves out of the pressure-pressing mechanism 11 and the pressure-measuring mechanism 12, the next moving module 13 moves to the pressure-pressing mechanism 11 and the pressure-measuring mechanism 12.

[0036] Reference Figure 4The moving module 13 includes a fixture base 20. The fixture base 20 has an opening at its upper end and is U-shaped. Two sets of symmetrical sliding cavities 26 are opened at the middle of the fixture base 20. Pushers 28 are slidably connected in both sets of sliding cavities 26. Springs 27 are connected between the sliding cavities 26 and the pushers 28. The pushers 28 can abut against the tee fittings on the fixture base 20. The middle part of the pushers 28 that abuts against the tee fittings is recessed. The pushers 28 are slidably disposed in the sliding cavities 26. The pushers 28 are supported by the springs connected to the springs 27. So when the tee fittings are inserted through the upper opening of the fixture base 20, the pushers 28 can abut against the outer end face of the upper opening of the fittings under the support of the springs 27. So when the fixture base 20 moves between the pressing mechanism 11 and the pressure measuring mechanism 12, the opening of the tee fittings is kept vertically upward by the abutment of the pushers 28.

[0037] Reference Figure 5 The mobile module 13 also includes a plug-in frame 22. Two grooves 21, distributed horizontally, are provided at the lower end of the fixture base 20. The plug-in frame 22 is plugged into the grooves 21. A sliding cavity 24 is provided on the plug-in frame 22. A screw hole 23 is provided on the upper side wall of the groove 21. The screw hole 23 and the sliding cavity 24 overlap vertically. A threaded component connects the groove 21 and the plug-in frame 22, passing through the sliding cavity 24 and threadedly connecting to the screw hole 23. Pads 25 are fixed at both the front and rear ends of the plug-in frame 22. The lower end face of the pad 25 is flush with the lower end face of the fixture base 20. The connector frame 22 is inserted into the groove 21. After the threaded part is inserted into the screw hole 23 through the sliding cavity 24 and rotated to make a threaded connection, the connector frame 22 is fixed to the tooling seat 20. The connector frame 22 is fixed to the chain by welding through the pad 25, so that the moving module 13 moves with the movement of the transport mechanism 14. When the moving module 13 is located on the upper side of the transport mechanism 14, the tee fitting is placed on the tooling seat 20 by the placement mechanism, and the upper opening of the tee fitting is positioned directly below the fixed block 32 after it moves to the bottom of the top pressing mechanism 11.

[0038] Reference Figure 6 The pusher 28 has inclined surfaces 29 at both the upper and lower ends near the tee fitting, and the inclined surfaces 29 can abut against the tee fitting. When the moving module 13 moves to the bottom of the transport mechanism 14, the tee fitting is pushed down so that it abuts against the inclined surfaces 29 on the pusher 28 and falls to be collected under the inclined contact between the inclined surfaces 29 and the circular wall of the tee fitting.

[0039] Reference Figure 7The pressure measuring mechanism 12 includes a fixed frame 40 integrally assembled with the other components. Two guide rails 48, distributed front and rear, are fixedly mounted on the upper end of the fixed frame 40. Threaded fittings are connected to the guide rails 48 for fixed assembly. Each of the front and rear guide rails 48 has a sliding block 41 capable of sliding up and down. A side cylinder 47 and a sliding tube 42 are respectively connected to the two sliding blocks 41. The sliding tube 42 has a keyway that slides in conjunction with the sliding block 41. Threaded fittings are installed between the side cylinder 47 and the sliding block 41 for fixation. The side cylinder 47 is connected to the sliding tube 42 at the end closest to it. A vent pipe 43 is fixedly connected to the lower end of the sliding tube 42. A solenoid valve 44 is installed on the vent pipe 43. A section of the sliding tube 42 is located on its outer periphery, away from the two sliding blocks 41. A threaded seat 45 is fixedly provided, and a side sealing plug 46 is threadedly connected to the threaded seat 45. Depending on the size of the tee fitting, the side sealing plug 46 is replaced by threaded connection with the threaded seat 45. After the fixing block 32 is inserted into the tee fitting, the sliding pipe 42, which is slidably connected to the sliding block 41, moves towards the tee fitting under the operation of the side cylinder 47. This allows the side sealing plug 46 to be inserted into the front and rear ends of the tee fitting to achieve a seal. One of the two vent pipes 43 is equipped with an air inlet and a nitrogen booster pump or a high-pressure gas test pump to deliver clean nitrogen or air for sealing test. The other vent pipe 43 is equipped with an air outlet and is connected to a pressure sensor to read the pressure change inside the fitting during the test.

[0040] Reference Figure 8 The guide rail 48 has a main slide groove 50 and an auxiliary slide groove 51 on its side. The main slide groove 50 has vertically distributed graduated grooves 52. One end of the sliding block 41 is threaded with a bolt 53, which passes through the main slide groove 50. An indicator 54 is fitted on the outer circumference of the bolt 53. The indicator 54 slides vertically with the auxiliary slide groove 51, and the indicator 54 corresponds vertically with the graduated grooves 52. According to the change in the size of the tee fitting, the positions of the front and rear openings of the tee fitting will change synchronously. The operator adjusts the vertical position of the side sealing plug 46 according to the changed size to prevent... To prevent leakage caused by the misalignment of the side sealing plug 46, the bolt 53 is rotated. With the bolt 53 and the sliding block 41 connected by threads, the bolt 53 can move left and right, thereby loosening the indicator 54. The reading is adjusted by the indicator 54 sliding up and down in the auxiliary slide groove 51 and coinciding with the scale groove 52. After adjustment, the bolt 53 is rotated in the opposite direction to move the bolt 53 to the indicator 54, thereby limiting the upper and lower positions of the sliding block 41. A shim is placed between the indicator 54 and the guide slide 48 to increase friction and prevent slippage.

[0041] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A pipe fitting airtightness testing device, comprising a transport platform (10), a pressure-pressing mechanism (11), and a pressure-measuring mechanism (12), characterized in that: The transport platform (10) is equipped with a transport mechanism (14), and a moving module (13) is connected to the transport mechanism (14). The moving modules (13) are evenly distributed and connected to the transport mechanism (14). A transmission pulley (15) is fixed on the transport mechanism (14) located at the right end. The transmission pulley (15) is connected to a stepper motor. The moving module (13) includes a tooling seat (20). The upper end of the tooling seat (20) is provided with an opening and is U-shaped. Two sets of left and right symmetrical sliding cavities (26) are opened at the middle position of the tooling seat (20). A pusher (28) is slidably connected in both sets of sliding cavities (26). A spring (27) is connected between the sliding cavity (26) and the pusher (28). The pusher (28) can abut against the three-way pipe on the tooling seat (20). The middle part of the pusher (28) abutting against the three-way pipe is recessed.

2. The pipe fitting airtightness testing device according to claim 1, characterized in that: The moving module (13) also includes a plug-in frame (22). The lower end of the tooling base (20) is provided with two grooves (21) distributed on the left and right. The plug-in frame (22) is plugged into the grooves (21). The plug-in frame (22) is provided with a sliding cavity (24). The upper side wall of the groove (21) is connected to a screw hole (23). The screw hole (23) and the sliding cavity (24) overlap vertically. The groove (21) and the plug-in frame (22) are connected by a threaded component. The front and rear ends of the plug-in frame (22) are both fixed with pads (25).

3. The pipe fitting airtightness testing device according to claim 1, characterized in that: The pressure measuring mechanism (12) includes a fixed frame (40) that is spliced ​​together. Two guide slides (48) distributed front and back are fixed at the upper end of the fixed frame (40). Each of the two guide slides (48) is provided with a sliding block (41) that can slide up and down. A side cylinder (47) and a sliding tube (42) are respectively connected to the two sliding blocks (41). The sliding tube (42) is provided with a keyway that slides in cooperation with the sliding block (41). The side cylinder (47) is connected to the sliding tube (42) at the end near the sliding tube (42). A vent pipe (43) is fixedly connected to the lower end of the sliding tube (42). A solenoid valve (44) is installed on the vent pipe (43). A threaded seat (45) is fixed on the outer periphery of the sliding tube (42) away from the two sliding blocks (41). A side sealing plug (46) is threadedly connected to the threaded seat (45).

4. The pipe fitting airtightness testing device according to claim 3, characterized in that: The guide rail (48) has a main slide groove (50) and an auxiliary slide groove (51) on its side. The main slide groove (50) has scale grooves (52) distributed vertically. One end of the sliding block (41) is threaded with a bolt (53). The bolt (53) passes through the main slide groove (50). An indicator (54) is sleeved on the outer periphery of the bolt (53). The indicator (54) slides vertically with the auxiliary slide groove (51). The indicator (54) can correspond vertically with the scale groove (52).

5. The pipe fitting airtightness testing device according to claim 1, characterized in that: The top pressure mechanism (11) includes a gantry (30) connected above the two pressure measuring mechanisms (12). A telescopic cylinder (31) is installed on the gantry (30). A fixing block (32) is connected to the lower end of the telescopic cylinder (31). A top sealing plug (33) is installed at the lower end of the fixing block (32). A threaded rod is fixed to the middle end of the top sealing plug (33) and threadedly connected to the fixing block (32).

6. The pipe fitting airtightness testing device according to claim 1, characterized in that: The pusher (28) has inclined surfaces (29) at both the upper and lower ends near the tee fitting, and the inclined surfaces (29) can abut against the tee fitting.

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