Pipe fitting air tightness test tool and test equipment
By using a movable positioning block and a linear drive mechanism in the pipe fitting airtightness testing equipment, the problem that existing equipment is difficult to adapt to pipe fittings of different lengths is solved, enabling flexible airtightness testing of pipe fittings of different lengths and reducing the trouble of changing tooling.
Patent Information
- Application Number
- CN202422744679.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-11-11
AI Technical Summary
Existing pipe air tightness testing equipment is not suitable for pipes of different lengths, resulting in the need to change to different testing fixtures.
By employing a movable positioning block and a linear drive mechanism, the positioning block is adjusted on the substrate, and the linear drive mechanism pushes the sealing plug assembly to seal the pipe opening, thereby enabling airtightness testing of pipes of different lengths.
It enables airtightness testing of pipe fittings of different lengths and specifications, reduces the hassle of changing test fixtures, and improves the applicability and flexibility of the testing equipment.
Smart Images
Figure CN223551245U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipe fitting sealing test technology, and more specifically, to a pipe fitting airtightness test fixture and test equipment. Background Technology
[0002] Pipe fittings are commonly used to transport various gases or liquids. In applications involving gas or liquid transport, the sealing performance of pipe fittings is a crucial performance indicator. Therefore, pipe fitting manufacturers must conduct airtightness tests before the fittings leave the factory to ensure that the product's sealing performance meets usage requirements.
[0003] The airtightness test of pipe fittings is usually performed using testing equipment, which includes a test fixture for fixing the pipe fitting. The testing process is as follows: the pipe fitting is fixed on the test fixture and the opening of the pipe fitting is sealed. Then, the pipe fitting is immersed in water and air is introduced into the pipe fitting. If no air bubbles emerge from the water, the pipe fitting has good airtightness.
[0004] The existing test fixture uses a positioning structure to fix the pipe fittings, and the position of the positioning structure itself is fixed within the test fixture. If a pipe fitting of different length is to be tested, the position of the pipe fitting and the positioning structure may not align. In this case, the positioning block cannot fix the pipe fitting, and a different test fixture needs to be used. Utility Model Content
[0005] To overcome the problem that the existing air tightness testing equipment is not applicable to pipes of different lengths, this utility model provides a pipe air tightness testing fixture and testing equipment that is applicable to air tightness testing of pipes of different lengths.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a pipe airtightness testing fixture, comprising: a base plate, a positioning block, and a linear drive mechanism. The positioning block is movably connected to the base plate and has a positioning groove for placing the pipe. The fixed end of the linear drive mechanism is connected to the base plate and located on the opening side of the pipe. The moving end of the linear drive mechanism is connected to a sealing plug assembly for sealing the pipe. An airflow channel is provided inside the sealing plug assembly. One end of the airflow channel is used to communicate with an external air source device, and the other end of the airflow channel is used to communicate with the interior of the pipe.
[0007] In this invention, a positioning block on a substrate is used to place the pipe fitting. A linear drive mechanism pushes a sealing plug assembly to seal the open side of the pipe fitting, thus sealing the interior of the pipe fitting. An airflow channel connects an external air source to the interior of the pipe fitting, facilitating airtightness testing. Since the positioning block is movably connected to the substrate, its position can be adjusted to correspond with the pipe fitting, making it suitable for testing pipe fittings of different lengths. The linear drive mechanism can move the sealing plug assembly within a certain distance, also suitable for testing pipe fittings of different lengths.
[0008] Furthermore, the substrate has a sliding groove, and the positioning blocks include at least two, each movably connected to the sliding groove along the central axis of the pipe. In this design, the two positioning blocks can support and position both ends of the pipe.
[0009] Furthermore, the positioning slot of the positioning block includes a first slot and a second slot. The first slot extends through the positioning block along the central axis of the pipe fitting, and the second slot is perpendicularly connected to the first slot and extends through the side of the positioning block. In this solution, by placing the pipe fitting in all or part of the first and second slots, different types of pipe fittings can be tested.
[0010] Furthermore, the pipe fitting airtightness testing fixture also includes a guide rail. The linear drive mechanism is slidably connected to the guide rail, allowing the linear drive mechanism to move to a first station or a second station. The first station is the position corresponding to the end of the linear drive mechanism relative to the end of the first groove, and the second station is the position corresponding to the end of the linear drive mechanism relative to the end of the second groove. In this design, the guide rail facilitates adjustment of the position of the linear drive mechanism.
[0011] Furthermore, the pipe fitting airtightness testing fixture also includes a cylinder support, the linear drive mechanism is a cylinder, the fixed end of the cylinder is fixedly connected to the cylinder support, and the bottom of the cylinder support is slidably connected to the guide rail. In this design, the cylinder support facilitates the installation of the linear drive mechanism.
[0012] Furthermore, the pipe airtightness testing fixture also includes a fixing member, one end of which is connected to the cylinder support, and the other end of which is connected to the base plate. In this solution, the fixing member can fix the linear drive mechanism and the base plate.
[0013] Furthermore, the fixing component is a pin, the cylinder support has a first insertion hole, and the base has multiple second insertion holes, each of which is located at either the first or second working position. The pin passes through the first insertion hole and connects to the second insertion hole. In this design, the cooperation of the pin, the first insertion hole, and the second insertion holes facilitates the adjustment of the fixed position of the linear drive mechanism.
[0014] Furthermore, the sealing plug assembly includes a sealing plug body and an air pipe connector. An air hole is formed in the middle of the sealing plug body. One end of the air pipe connector is connected to the sealing plug body and communicates with the air hole, while the other end of the air pipe connector is used to connect to an external air source device. In this solution, an external air source device is connected via the air pipe connector, and the opening of the pipe fitting is sealed by the sealing plug body.
[0015] Furthermore, each of the positioning blocks has two sets of positioning grooves, and the central axes of the first grooves of the positioning grooves on different positioning blocks are on the same straight line. Four linear drive mechanisms are provided, each located at either the first or second workstation. In this solution, two sets of pipe fittings can be tested simultaneously.
[0016] This utility model also provides a pipe fitting airtightness testing device, including a pipe fitting airtightness testing fixture, a frame, a lifting device, and a water tank. The fixed end of the lifting device is fixedly connected to the frame, and the moving end of the lifting device is fixedly connected to the base plate of the pipe fitting airtightness testing fixture. The water tank is fixedly connected to the frame. The lifting device is used to drive the pipe fitting airtightness testing fixture into or out of the water tank. In this solution, the airtightness of pipe fittings can be tested using the testing device.
[0017] Compared with the prior art, the beneficial effects of this utility model are:
[0018] I. This utility model discloses a pipe fitting airtightness testing fixture. A positioning block on a base plate is used to place the pipe fitting. A linear drive mechanism pushes a sealing plug assembly to seal the open side of the pipe fitting, thus sealing the interior of the pipe fitting. An airflow channel connects an external air source to the interior of the pipe fitting for airtightness testing. Since the positioning block is movably connected to the base plate, its position can be adjusted to accommodate pipe fittings of different lengths.
[0019] Second, the positioning block has a first groove and a second groove that are perpendicular to each other, so that the linear drive mechanism has a first station and a second station corresponding to the first groove and the second groove. The linear drive mechanism can move to the first station and the second station through the guide rail, thus making it suitable for pipe fittings of different specifications.
[0020] Third, the pipe fitting air tightness testing equipment of this utility model adopts the above-mentioned pipe fitting air tightness testing fixture, which can be applied to the testing of pipe fittings of different lengths or specifications, and can reduce the trouble of changing testing fixtures. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of the pipe fitting airtightness testing fixture and testing equipment of this utility model;
[0022] Figure 2 yes Figure 1 A top-down view of the structure;
[0023] Figure 3 yes Figure 1 A schematic diagram of the overall structure after the pipe fittings have been placed;
[0024] Figure 4 This is a top-view structural diagram of the substrate and track;
[0025] Figure 5 This is a schematic diagram of the sealing plug assembly;
[0026] Figure 6 yes Figure 5 Cross-sectional view along section AA;
[0027] Figure 7 This is a schematic diagram of the cylinder support structure;
[0028] Figure 8 This is a schematic diagram of the sliding connection between the cylinder support and the guide rail;
[0029] Figure 9 This is a structural schematic diagram of the pipe fitting airtightness testing equipment of this utility model.
[0030] In the attached diagram: 1. Base plate; 11. Slide groove; 12. Second insertion hole; 13. Waist-shaped hole; 2. Positioning block; 21. Positioning groove; 211. First groove; 212. Second groove; 3. Linear drive mechanism; 4. Sealing plug assembly; 41. Sealing plug body; 411. Air hole; 42. Air pipe connector; 43. Airflow channel; 5. Guide rail; 6. Cylinder support; 61. First insertion hole; 62. Horizontal plate; 63. Vertical plate; 64. Reinforcing plate; 65. Roller; 7. Fixing component; 8. Frame; 9. Lifting device; 10. Water tank; 100. Pipe fitting. Detailed Implementation
[0031] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.
[0032] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0033] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings:
[0034] Example 1
[0035] refer to Figures 1 to 3 This embodiment discloses a pipe airtightness testing fixture, including a base plate 1, a positioning block 2, and a linear drive mechanism 3. The positioning block 2 is movably connected to the base plate 1, and a positioning groove 21 for placing the pipe 100 is provided on the positioning block 2. The fixed end of the linear drive mechanism 3 is connected to the base plate 1 and located on the opening side of the pipe 100. The moving end of the linear drive mechanism 3 is connected to a sealing plug assembly 4 for sealing the pipe 100. An airflow channel 43 is provided in the sealing plug assembly 4. One end of the airflow channel 43 is used to communicate with an external air source device, and the other end of the airflow channel 43 is used to communicate with the interior of the pipe 100.
[0036] In this invention, a positioning block 2 on a substrate 1 is used to place a pipe 100. A linear drive mechanism 3 pushes a sealing plug assembly 4 to seal the opening side of the pipe 100, thereby sealing the interior of the pipe 100. An airflow channel 43 connects an external air source to the interior of the pipe 100 to facilitate airtightness testing. Since the positioning block 2 is movably connected to the substrate 1, its position can be adjusted to correspond to the position of the pipe 100, making it suitable for testing pipes 100 of different lengths. The linear drive mechanism 3 can move the sealing plug assembly 4 within a certain distance range, also suitable for testing pipes 100 of different lengths.
[0037] The base plate 1, which serves as the support for the entire fixture, is located at the bottom of the test fixture. Several oblong holes 13 are provided on the base plate 1 for fixing the test fixture to the external structure. The upper surface of the positioning block 2 is provided with a positioning groove 21 that matches the pipe 100, so that the pipe 100 can be placed on the positioning block 2 without falling off.
[0038] The positioning block 2 is movably connected to the base plate 1. In some embodiments, a slide rail can be connected to the base plate 1, and a slider can be connected to the bottom of the positioning block 2, so that the positioning block 2 can move on the base plate 1.
[0039] In this embodiment, the substrate 1 has a groove 11, and the positioning blocks 2 include at least two, each movably connected to the groove 11 along the central axis of the tube 100. The bottom of the positioning block 2 matches the groove 11, allowing the positioning block 2 to be placed in the groove 11 and to move along the extension direction of the groove 11. The two positioning blocks 2 can respectively support both ends of the tube 100, ensuring the stability of the tube 100 during testing. Taking the XY coordinate direction in the figure as an example, the central axis of the tube 100 extends along the Y direction, and the groove 11 also extends along the Y direction. The positioning blocks 2 can move along the Y direction in the groove 11, wherein the positioning groove 21 of the positioning block 2 includes at least a portion extending through the positioning block 2 along the Y direction. In this way, the position of each positioning block 2 in the groove 11 can be adjusted along the Y direction according to the length of the tube 100, so that the positioning groove 21 of the positioning block 2 can match the length of the tube 100.
[0040] refer to Figure 1 and Figure 2 The positioning groove 21 of the positioning block 2 includes a first groove 211 and a second groove 212. The first groove 211 passes through the positioning block 2 along the central axis of the pipe fitting 100. The second groove 212 is perpendicularly connected to the first groove 211 and passes through the side of the positioning block 2.
[0041] Taking the XY coordinates shown in the figure as an example, the extension direction of the first groove 211 is the Y direction, and the extension direction of the second groove 212 is the X direction. The first groove 211 and the second groove 212 correspond to different types of pipe fittings 100 when in use, and can be used adaptively according to the structure of the pipe fittings 100.
[0042] For example, when the pipe fitting 100 does not have an elbow, that is, when the openings at both ends of the pipe fitting 100 are on a straight line, the pipe fitting 100 can be positioned by placing it on the entire first groove 211. At this time, the axis of the pipe fitting 100 is placed along the Y direction.
[0043] Or such as Figure 3As shown, when the pipe fitting 100 has an elbow, the main body of the pipe fitting 100 is placed on the first groove 211 of the portion, and the elbow is placed on the first groove 211 and the second groove 212 of the portion, thus achieving the positioning of the pipe fitting 100 with the elbow. At this time, the axis of the pipe fitting 100 is along the Y direction, while the elbow portion extends along the X direction.
[0044] In some embodiments, different pipe fittings 100 can be tested by disassembling the linear drive mechanism 3 and reinstalling it in different positions on the substrate 1.
[0045] Example 2
[0046] refer to Figures 1 to 8 This embodiment is similar to Embodiment 1, except that in this embodiment, the pipe airtightness testing fixture also includes a guide rail 5. The linear drive mechanism 3 is slidably connected to the guide rail 5 so that the linear drive mechanism 3 can move to the first station or the second station. The first station is the position corresponding to the end of the linear drive mechanism 3 and the end of the first groove 211, and the second station is the position corresponding to the end of the linear drive mechanism 3 and the end of the second groove 212.
[0047] The guide rail 5 surrounds the positioning block 2, allowing the linear drive mechanism 3 to move along the guide rail 5, thereby changing its corresponding position with either the first groove 211 or the second groove 212. Referring to the XY coordinates in the figure, the first groove 211 extends along the Y direction. When the linear drive mechanism 3 is positioned directly opposite both ends of the first groove 211 along the Y direction, the linear drive mechanism 3 is in the first position. The second groove 212 extends along the X direction; when the linear drive mechanism 3 is positioned directly opposite the end of the second groove 212 along the X direction, the linear drive mechanism 3 is in the second position.
[0048] The linear drive mechanism 3 is positioned at different first or second stations, allowing the testing fixture to be applied to the testing of different pipe fittings 100. The following example uses a pipe fitting 100 with openings at both ends. If the pipe fitting 100 has other numbers of openings, such as a tee pipe, those skilled in the art can still derive the arrangement of the linear drive mechanism 3 using a similar approach.
[0049] refer to Figures 1 to 3 In this embodiment, the substrate 1 is provided with two positioning blocks 2, and each positioning block 2 has two sets of positioning grooves 21. The central axes of the first grooves 211 of the positioning grooves 21 located on different positioning blocks 2 are on the same straight line. Four sets of linear drive mechanisms 3 are provided, and each linear drive mechanism 3 is located at the first station or the second station. This embodiment can simultaneously perform airtightness tests on two pipe fittings 100, and is suitable for pipe fittings 100 with openings at both ends.
[0050] For a pipe fitting 100 with openings at both ends, each linear drive mechanism 3 can be combined in different working states to form at least three states, which are applicable to three different pipe fitting 100 tests.
[0051] In the first state, the linear drive mechanisms 3 at both ends of the pipe fitting 100 are in the first position, and the pipe fitting 100 that can be tested at this time is a straight pipe without bends (not shown in the figure).
[0052] In the second state, refer to Figure 1 The linear drive mechanism 3 at one end of the pipe fitting 100 is in the first station, and the linear drive mechanism 3 at the other end is in the second station. At this time, the pipe fitting 100 that can be tested is the pipe fitting 100 with only one end having an elbow.
[0053] In the third state, the linear drive mechanisms 3 at both ends of the pipe fitting 100 are in the second position. At this time, the pipe fitting 100 that can be measured is the pipe fitting 100 with elbows at both ends (not shown in the figure).
[0054] It is understandable that in some other use cases, fitting 100 can be a fitting 100 that includes both straight and curved sections, rather than a fitting 100 that must be connected to a bend.
[0055] In this embodiment, the testing of different pipe fittings 100 can be achieved by manually pushing the linear drive mechanism 3 to the corresponding workstation. In other embodiments, other drive structures can be added to drive the linear drive mechanism 3 to switch between different workstations. For example, a drive trolley can be set between the bottom of the linear drive mechanism 3 and the guide rail 5. The bottom of the linear drive mechanism 3 is fixedly connected to the drive trolley, and the drive trolley can move along the rail, thereby enabling automatic control of the linear drive mechanism 3 to switch between different workstations.
[0056] In this embodiment, the pipe fitting air tightness testing fixture also includes a cylinder support, the linear drive mechanism is a cylinder, the fixed end of the cylinder is fixedly connected to the cylinder support, and the bottom of the cylinder support is slidably connected to the guide rail 5.
[0057] refer to Figure 7 Specifically, the cylinder support includes a horizontal plate 62, a vertical plate 63, and a reinforcing plate 64. The horizontal plate 62 and the vertical plate 63 can be approximately rectangular, and the reinforcing plate 64 can be approximately right-angled triangular. The horizontal plate 62 is arranged horizontally, and the vertical plate 63 is arranged vertically. The vertical plate 63 can be welded or bolted to one end of the horizontal plate 62. The two right-angled sides of the reinforcing plate 64 are welded or bolted to the horizontal plate 62 and the vertical plate 63, respectively. A through hole is provided in the middle of the vertical plate 63 for the moving end of the cylinder to pass through. The fixed end of the cylinder can be bolted to the vertical plate 63.
[0058] refer to Figure 7 and Figure 8 The bottom of the cylinder support is provided with a rotatable roller 65, which is rotatably connected to the bottom of the horizontal plate 62. In this embodiment, a pair of rollers 65 are respectively located on both sides of the guide rail 5, and a horizontally arranged protrusion is provided on the top of the rail. The pair of rollers 65 are respectively rolled and clamped on both sides of the protrusion, thereby enabling the cylinder support to be movably connected to the guide rail 5.
[0059] The pipe fitting airtightness testing fixture also includes a fixing member 7, one end of which is connected to the cylinder support, and the other end of which is connected to the base plate 1. The fixing member 7 can fix the position of the linear drive mechanism 3 and prevent the linear drive mechanism 3 from shifting at the work station.
[0060] refer to Figures 1 to 3 In this embodiment, the fixing member 7 is a pin. The cylinder support has a first insertion hole 61, and the base has multiple second insertion holes 12. Each second insertion hole 12 is located at a first or second working position. The pin passes through the first insertion hole 61 and connects to the second insertion hole 12. Through the cooperation between the pin, the first insertion hole 61, and the second insertion holes 12, the linear drive mechanism 3 can be locked in the working position, while also making it convenient to remove the pin and readjust the position of the linear drive mechanism 3.
[0061] In this embodiment, the sealing plug assembly 4 includes a sealing plug body 41 and an air pipe connector 42. An air hole 411 is provided in the middle of the sealing plug body 41. One end of the air pipe connector 42 is connected to the sealing plug body 41 and communicates with the air hole 411. The other end of the air pipe connector 42 is used to connect to an external air source device.
[0062] refer to Figure 5 and Figure 6 The sealing plug body 41 can be made of urethane material and can be pressed tightly against the end opening of the pipe fitting 100 to seal the pipe fitting 100. The air pipe connector 42 is a connector part used to connect to an external air source, and the airflow channel 43 is formed inside the air pipe connector 42.
[0063] Taking the illustrated direction as an example, the upper interface of the tracheal connector 42 is used to connect to an external air source device, the left end of the tracheal connector 42 is used to be fixedly connected to the actuator end of the linear drive mechanism 3, and the right end of the tracheal connector 42 is connected to the sealing plug body 41. The opening in the middle of the sealing plug body 41 communicates with the outlet at the right end of the tracheal connector 42, allowing gas from the external air source device to enter the interior of the pipe fitting 100 through the opening in the middle of the sealing plug body 41.
[0064] Example 3
[0065] refer to Figures 1 to 8 as well as Figure 9This embodiment provides a pipe fitting airtightness testing device, including a pipe fitting airtightness testing fixture, a frame 8, a lifting device 9, and a water tank 10. The fixed end of the lifting device 9 is fixedly connected to the frame 8, and the moving end of the lifting device 9 is fixedly connected to the base plate 1 of the pipe fitting airtightness testing fixture. The water tank 10 is fixedly connected to the frame 8. The lifting device 9 is used to drive the pipe fitting airtightness testing fixture into or out of the water tank 10. The pipe fitting airtightness testing fixture in this embodiment is the same as at least one of Embodiment 1 or Embodiment 2.
[0066] In this embodiment, the frame 8 is used to install the lifting device 9 and the water tank 10. The lifting device 9 facilitates the driving of the test fixture into or out of the water tank 10, which is convenient for the airtightness test of the pipe fitting 100.
[0067] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A fixture for testing the air tightness of pipe fittings, characterized in that: The device includes a base plate (1), a positioning block (2), and a linear drive mechanism (3). The positioning block (2) is movably connected to the base plate (1). The positioning block (2) has a positioning groove (21) for placing the pipe (100). The fixed end of the linear drive mechanism (3) is connected to the base plate (1) and located on the opening side of the pipe (100). The moving end of the linear drive mechanism (3) is connected to a sealing plug assembly (4) for sealing the pipe (100). An airflow channel (43) is provided in the sealing plug assembly (4). One end of the airflow channel (43) is used to communicate with an external air source device, and the other end of the airflow channel (43) is used to communicate with the interior of the pipe (100).
2. The pipe fitting airtightness testing fixture according to claim 1, characterized in that: The substrate (1) has a groove (11), and the positioning block (2) includes at least two blocks, all of which are movably connected to the groove (11) along the central axis of the tube (100).
3. The pipe fitting airtightness testing fixture according to claim 2, characterized in that: The positioning groove (21) of the positioning block (2) includes a first groove (211) and a second groove (212). The first groove (211) passes through the positioning block (2) along the central axis of the pipe (100). The second groove (212) is perpendicularly connected to the first groove (211) and passes through the side of the positioning block (2).
4. The pipe fitting airtightness testing fixture according to claim 3, characterized in that: The pipe fitting air tightness testing fixture also includes a guide rail (5). The linear drive mechanism (3) is slidably connected to the guide rail (5) so that the linear drive mechanism (3) can move to a first station or a second station. The first station is the position corresponding to the end of the linear drive mechanism (3) and the end of the first groove (211). The second station is the position corresponding to the end of the linear drive mechanism (3) and the end of the second groove (212).
5. The pipe fitting airtightness testing fixture according to claim 4, characterized in that: The pipe fitting air tightness test fixture also includes a cylinder support. The linear drive mechanism (3) is a cylinder. The fixed end of the cylinder is fixedly connected to the cylinder support, and the bottom of the cylinder support is slidably connected to the guide rail (5).
6. The pipe fitting airtightness testing fixture according to claim 5, characterized in that: The pipe fitting air tightness test fixture also includes a fixing member (7), one end of which is connected to the cylinder support, and the other end of which is connected to the base plate (1).
7. The pipe fitting airtightness testing fixture according to claim 6, characterized in that: The fixing component (7) is a pin. The cylinder support has a first insertion hole (61) and the base has multiple second insertion holes (12). Each second insertion hole (12) is located at the first working position or the second working position. The pin passes through the first insertion hole (61) and connects with the second insertion hole (12).
8. The pipe fitting airtightness testing fixture according to any one of claims 1-7, characterized in that: The sealing plug assembly (4) includes a sealing plug body (41) and an air pipe connector (42). The sealing plug body (41) has an air hole (411) in the middle. One end of the air pipe connector (42) is connected to the sealing plug body (41) and communicates with the air hole (411). The other end of the air pipe connector (42) is used to connect to an external air source device.
9. The pipe fitting airtightness testing fixture according to claim 8, characterized in that: Each of the positioning blocks (2) is provided with two sets of positioning grooves (21). The central axis of the first groove body (211) of the positioning groove (21) of different positioning blocks (2) is on the same straight line. The linear drive mechanism (3) is provided with four sets. Each of the linear drive mechanisms (3) is located at the first work station or the second work station.
10. A pipe fitting (100) airtightness testing device, characterized in that: The device includes the pipe fitting air tightness testing fixture as described in any one of claims 1-9, and further includes a frame (8), a lifting device (9), and a water tank (10). The fixed end of the lifting device (9) is fixedly connected to the frame (8), and the moving end of the lifting device (9) is fixedly connected to the base plate (1) of the pipe fitting air tightness testing fixture. The water tank (10) is fixedly connected to the frame (8). The lifting device (9) is used to drive the pipe fitting air tightness testing fixture into or out of the water tank (10).