High-pressure common rail pipe air tightness detector and use method thereof

Abstract

The invention discloses a high-pressure common rail pipe airtightness detector and a use method thereof.The high-pressure common rail pipe airtightness detector comprises a bottom plate and a high-pressure common rail pipe workpiece arranged at the top of the bottom plate, the top of the bottom plate is provided with a positioning detection structure located on the outer side of the high-pressure common rail pipe workpiece, and the top of the bottom plate is provided with a transmission structure located on the top of the positioning detection structure; and the positioning detection structure comprises a connecting block arranged at the top of the bottom plate. According to the high-pressure common-rail pipe sealing performance testing device, clamping plates are extruded through a transmission structure, the clamping plates swing with pin shafts in connecting blocks as axes, when the clamping plates move to the outer side of a high-pressure common-rail pipe workpiece, the effect of positioning and installing the high-pressure common-rail pipe workpiece is achieved, the structural functionality of an existing high-pressure common-rail pipe sealing performance testing device can be improved, and the testing efficiency is improved. The internal flowing air pressure is detected instead of a mode of manually connecting the pipeline and the air pipe, time and labor are saved, and the phenomenon of leakage of the connecting pipeline due to manual insertion errors in the testing process can be prevented.

Description

Technical Field

[0001] The invention relates to the technical field of high-pressure common rail pipe preparation, and in particular to a high-pressure common rail pipe air tightness detector and a use method thereof. Background Art

[0002] The high-pressure common rail is a part of the diesel injection system. It distributes the high-pressure fuel provided by the fuel pump to each injector and acts as an accumulator. Its volume should reduce the fuel supply pressure fluctuation of the high-pressure fuel pump and the pressure oscillation caused by the injection process of each injector, so that the pressure fluctuation in the high-pressure fuel rail is controlled below 5Mpa. However, its volume cannot be too large to ensure that the common rail has sufficient pressure response speed to quickly track changes in the diesel engine operating conditions.

[0003] For example, the patent number disclosed by the China Patent Network is: 202223356914.0, and the patent name is: A high-pressure common rail pipe sealing test device, including a cabinet, a water pool is installed at the top center of the cabinet, a high-pressure air pump is installed on one side of the top of the cabinet, the air outlet end of the high-pressure air pump is connected to one end of the air supply hose, and the other end of the air supply hose is fixed with an air supply joint; a storage box is installed on the other side of the top of the cabinet, and a plurality of sealing plugs are placed inside the storage box; a control panel is installed on the side of the cabinet, and the control panel is electrically connected to the high-pressure air pump. The utility model adopts a ventilation method to realize a rapid test of the sealing of the high-pressure common rail pipe, and can quickly locate the damaged position of the high-pressure common rail pipe according to the location where the bubbles are generated. It has a simple structure and is easy to use.

[0004] However, the structure of the existing high-pressure common rail pipe sealing test device is relatively simple, and the internal flow air pressure is mainly detected by manually connecting the pipe and the air pipe, which is time-consuming and labor-intensive. In addition, the connecting pipe is prone to leakage due to manual plug-in errors during the test.

[0005] Therefore, it is necessary to design and modify the high-pressure common rail gas tightness detector and the method of using the same. Summary of the invention

[0006] In order to solve the problems raised in the above-mentioned background technology, the purpose of the present invention is to provide a high-pressure common rail pipe air tightness detector and a method of using the same, which has the advantage of improving the detection stability and solves the problem that the existing high-pressure common rail pipe sealing test device has a relatively simple structure and mainly detects the internal flow air pressure by manually connecting the pipe and the air pipe, which is time-consuming and labor-intensive, and the connecting pipe is prone to leakage due to manual plug-in errors during the test.

[0007] To achieve the above object, the present invention provides the following technical solutions: a high-pressure common rail air tightness detector and a method of using the same, comprising a base plate;

[0008] A high pressure common rail pipe workpiece disposed on the top of the base plate;

[0009] The top of the bottom plate is provided with a positioning detection structure located outside the high-pressure common rail pipe workpiece;

[0010] The top of the bottom plate is provided with a transmission structure located on the top of the positioning detection structure;

[0011] The positioning detection structure includes a connecting block arranged on the top of the base plate, the connecting block is located at the bottom of the high-pressure common rail pipe workpiece, the connecting block is fixedly connected to the base plate, a clamping plate is arranged on the top of the base plate, the clamping plate is sleeved on the surface of the connecting block, the connecting block and the clamping plate are movably connected through a pin shaft, the side of the clamping plate away from the connecting block extends to the outside of the high-pressure common rail pipe workpiece, the inner side of the clamping plate contacts the surface of the high-pressure common rail pipe workpiece, the outer side of the clamping plate is connected to an air pressure detector, the detection end of the air pressure detector passes through the clamping plate and extends to the inner side of the clamping plate, the detection end of the air pressure detector is connected to the outer end of the high-pressure common rail pipe workpiece, a bracket is fixedly connected to the top of the base plate, a sleeve is fixedly connected to the side of the bracket away from the base plate, the sleeve is sleeved on the surface of the high-pressure common rail pipe workpiece, and the sleeve and the high-pressure common rail pipe workpiece are slidably connected.

[0012] As a preferred embodiment of the present invention, the transmission structure includes a connecting frame fixedly connected to the outer side of the base plate, an opening is provided on the surface of the splint, a threaded component is provided on the top of the base plate, the outer end of the threaded component passes through the opening and extends to the inner side of the connecting frame, the connecting frame and the threaded component are movably connected through a bearing, the left and right sides of the surface of the threaded component are threadedly connected with a screw sleeve, the screw sleeve is located on the outer side of the splint, a pressure rod is fixedly connected to the surface of the screw sleeve, and the side of the pressure rod away from the screw sleeve is in contact with the outer side of the splint.

[0013] As a preferred embodiment of the present invention, a guide rod is provided on the top of the base plate, and the guide rod is located at the bottom of the threaded assembly. The left end and the right end of the guide rod respectively pass through the opening and the screw sleeve and extend to the outside of the screw sleeve, the outer end of the guide rod is fixedly connected to the surface of the connecting frame, and the guide rod is slidably connected to the screw sleeve.

[0014] As a preferred embodiment of the present invention, a spring plate is fixedly connected to the top of the base plate, the spring plate is located on the inner side of the connecting block, a side of the spring plate away from the base plate is in contact with the inner side of the clamping plate, and the spring plate is elastic.

[0015] As a preferred embodiment of the present invention, the surface of the sleeve is fixedly connected to an extension ring sleeved on the surface of the high-pressure common rail pipe workpiece, the extension ring is slidably connected to the high-pressure common rail pipe workpiece, the bottom of the extension ring is fixedly connected to a connecting rod, and the side of the connecting rod away from the extension ring is fixedly connected to the surface of the bracket.

[0016] As a preferred embodiment of the present invention, a side of the pressure rod away from the screw sleeve is movably connected to a roller via a pin, and an outer surface of the roller is in contact with an outer side of the clamping plate.

[0017] As a preferred embodiment of the present invention, a rubber ring is fixedly connected to the inner side of the clamping plate, the rubber ring is sleeved on the surface of the high-pressure common rail pipe workpiece, the rubber ring is elastic, and the rubber ring is slidably connected to the high-pressure common rail pipe workpiece.

[0018] A high-pressure common rail pipe air tightness detector and a method for using the same, comprising the following steps:

[0019] S1: First, insert the high-pressure common rail pipe workpiece into the interior of the sleeve;

[0020] S2: Rotate the threaded assembly, the threaded assembly rotates and uses the threads on the surface to push the screw sleeves to move toward each other. During the movement of the screw sleeves, the clamping plate is squeezed by the pressure rod to make the clamping plate swing around the pin shaft inside the connecting block. When the clamping plate moves to the outside of the high-pressure common rail pipe workpiece and the inner rubber ring is set on the surface of the high-pressure common rail pipe workpiece, the high-pressure common rail pipe workpiece is positioned and installed.

[0021] S3: Two air pressure detectors can perform pressurized testing on the high-pressure common rail pipe workpiece. When the internal pressure of the high-pressure common rail pipe workpiece remains unchanged during the testing process, the quality of the high-pressure common rail pipe workpiece is qualified. The user rotates the threaded component in the opposite direction and plugs and replaces the high-pressure common rail pipe workpiece to form a cycle.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention squeezes the clamping plate through the transmission structure so that the clamping plate swings with the pin shaft inside the connecting block as the axis. When the clamping plate moves to the outside of the high-pressure common rail pipe workpiece, the high-pressure common rail pipe workpiece is positioned and installed. The present invention can improve the structural functionality of the existing high-pressure common rail pipe sealing test device, replace the method of manually connecting the pipeline and the air pipe to detect the internal flow air pressure, save time and labor, and prevent the connection pipeline from leaking due to manual plugging errors during the test.

[0024] 2. The present invention rotates the threaded component and utilizes the threads on the surface to push the screw sleeves to move toward each other. During the movement of the screw sleeves, the pressure rod is used to squeeze the clamping plates, so that the clamping plates swing with the pin shaft inside the connecting block as the axis. The two clamping plates can be pushed to swing at the same time, and the squeezing strength of the clamping plates can be controlled to prevent leakage.

[0025] 3. The present invention can limit the screw sleeve by setting a guide rod, thereby preventing the screw sleeve from tilting during movement.

[0026] 4. The present invention can support the splint by providing a spring plate, so that the splint has an elastic reset effect, saving the user the operation steps of pushing the splint back and forth to swing.

[0027] 5. The present invention can increase the contact area between the sleeve and the bracket by providing an extension ring and a connecting rod, thereby preventing the connection between the two from breaking due to excessive load.

[0028] 6. The present invention can protect the pressure rod by arranging the roller, thereby reducing the wear of the pressure rod and the clamping plate during contact and friction.

[0029] 7. The present invention can improve the sealing effect of the clamping plate by providing a rubber ring, prevent the formation of a gap between the clamping plate and the high-pressure common rail pipe workpiece, and facilitate air pressure injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the main structure of the present invention;

[0032] Figure 3 It is a schematic diagram of the partial structure of the present invention;

[0033] Figure 4 It is a schematic diagram of the transmission structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the positioning detection structure of the present invention;

[0035] Figure 6 It is a right side schematic diagram of the positioning detection structure of the present invention.

[0036] In the figure: 1. bottom plate; 2. high-pressure common rail pipe workpiece; 3. positioning detection structure; 4. transmission structure; 5. connecting block; 6. clamping plate; 7. air pressure detector; 8. bracket; 9. sleeve; 10. connecting frame; 11. opening; 12. threaded assembly; 13. screw sleeve; 14. pressure rod; 15. guide rod; 16. spring plate; 17. extension ring; 18. connecting rod; 19. roller; 20. rubber ring. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figures 1 to 6As shown, a high-pressure common rail air tightness detector and a method of using the same provided by the present invention include a base plate 1;

[0039] A high pressure common rail pipe workpiece 2 is arranged on the top of the base plate 1;

[0040] A positioning detection structure 3 located outside the high-pressure common rail pipe workpiece 2 is provided on the top of the bottom plate 1;

[0041] A transmission structure 4 located on the top of the positioning detection structure 3 is provided on the top of the bottom plate 1;

[0042] The positioning detection structure 3 includes a connecting block 5 arranged on the top of the base plate 1, the connecting block 5 is located at the bottom of the high-pressure common rail pipe workpiece 2, the connecting block 5 is fixedly connected to the base plate 1, a clamping plate 6 is arranged on the top of the base plate 1, the clamping plate 6 is sleeved on the surface of the connecting block 5, the connecting block 5 and the clamping plate 6 are movably connected through a pin shaft, the side of the clamping plate 6 away from the connecting block 5 extends to the outside of the high-pressure common rail pipe workpiece 2, the inner side of the clamping plate 6 contacts the surface of the high-pressure common rail pipe workpiece 2, the outer side of the clamping plate 6 is connected with an air pressure detector 7, the detection end of the air pressure detector 7 passes through the clamping plate 6 and extends to the inner side of the clamping plate 6, the detection end of the air pressure detector 7 is connected with the outer end of the high-pressure common rail pipe workpiece 2, a bracket 8 is fixedly connected to the top of the base plate 1, a sleeve 9 is fixedly connected to the side of the bracket 8 away from the base plate 1, the sleeve 9 is sleeved on the surface of the high-pressure common rail pipe workpiece 2, and the sleeve 9 and the high-pressure common rail pipe workpiece 2 are slidably connected.

[0043] refer to Figure 2 The transmission structure 4 includes a connecting frame 10 fixedly connected to the outer side of the base plate 1, an opening 11 is opened on the surface of the clamping plate 6, a threaded component 12 is arranged on the top of the base plate 1, the outer end of the threaded component 12 passes through the opening 11 and extends to the inner side of the connecting frame 10, the connecting frame 10 and the threaded component 12 are movably connected through a bearing, and the left and right sides of the surface of the threaded component 12 are threadedly connected with a screw sleeve 13, the screw sleeve 13 is located on the outer side of the clamping plate 6, and a pressure rod 14 is fixedly connected to the surface of the screw sleeve 13, and the side of the pressure rod 14 away from the screw sleeve 13 contacts the outer side of the clamping plate 6.

[0044] As a technical optimization scheme of the present invention, the threaded component 12 is rotated and the threads on the surface are used to push the screw sleeves 13 to move toward each other. During the movement of the screw sleeve 13, the pressure rod 14 is used to squeeze the clamping plate 6, so that the clamping plate 6 swings around the pin shaft inside the connecting block 5 as the axis. The two clamping plates 6 can be pushed to swing at the same time, and the squeezing strength of the clamping plates 6 can be controlled to prevent leakage.

[0045] refer to Figure 3A guide rod 15 is provided on the top of the base plate 1, and the guide rod 15 is located at the bottom of the threaded assembly 12. The left end and the right end of the guide rod 15 respectively penetrate the opening 11 and the screw sleeve 13 and extend to the outside of the screw sleeve 13. The outer end of the guide rod 15 is fixedly connected to the surface of the connecting frame 10, and the guide rod 15 is slidably connected to the screw sleeve 13.

[0046] As a technical optimization solution of the present invention, by providing a guide rod 15, the screw sleeve 13 can be limited to avoid the screw sleeve 13 from tilting during the movement.

[0047] refer to Figure 3 A spring plate 16 is fixedly connected to the top of the bottom plate 1. The spring plate 16 is located on the inner side of the connecting block 5. The side of the spring plate 16 away from the bottom plate 1 contacts the inner side of the clamping plate 6. The spring plate 16 is elastic.

[0048] As a technical optimization solution of the present invention, by providing a spring plate 16, the clamping plate 6 can be supported so that the clamping plate 6 has an elastic reset effect, saving the user the operation steps of pushing the clamping plate 6 back and forth to swing.

[0049] refer to Figure 2 The surface of the sleeve 9 is fixedly connected with an extension ring 17 sleeved on the surface of the high-pressure common rail pipe workpiece 2. The extension ring 17 is slidably connected to the high-pressure common rail pipe workpiece 2. The bottom of the extension ring 17 is fixedly connected with a connecting rod 18. The side of the connecting rod 18 away from the extension ring 17 is fixedly connected to the surface of the bracket 8.

[0050] As a technical optimization solution of the present invention, by providing the extension ring 17 and the connecting rod 18, the contact area between the sleeve 9 and the bracket 8 can be increased to prevent the connection between the two from breaking due to excessive load.

[0051] refer to Figure 3 The side of the pressure rod 14 away from the screw sleeve 13 is movably connected to a roller 19 through a pin, and the outer surface of the roller 19 contacts the outer side of the clamping plate 6.

[0052] As a technical optimization solution of the present invention, by providing the roller 19, the pressure rod 14 can be protected and the wear of the pressure rod 14 and the clamping plate 6 during contact and friction can be reduced.

[0053] refer to Figure 2 A rubber ring 20 is fixedly connected to the inner side of the clamping plate 6. The rubber ring 20 is sleeved on the surface of the high-pressure common rail pipe workpiece 2. The rubber ring 20 is elastic and is slidably connected to the high-pressure common rail pipe workpiece 2.

[0054] As a technical optimization solution of the present invention, by providing the rubber ring 20, the sealing effect of the clamping plate 6 can be improved, and a gap between the clamping plate 6 and the high-pressure common rail pipe workpiece 2 can be prevented, so as to facilitate air pressure injection.

[0055] refer to Figure 1 A high-pressure common rail pipe air tightness detector and a method of using the same, characterized in that it comprises the following steps:

[0056] S1: First, insert the high-pressure common rail pipe workpiece 2 into the sleeve 9;

[0057] S2: Rotate the threaded component 12, the threaded component 12 rotates and uses the threads on the surface to push the screw sleeve 13 to move toward each other. During the movement of the screw sleeve 13, the pressure rod 14 is used to squeeze the clamping plate 6, so that the clamping plate 6 swings around the pin shaft inside the connecting block 5. When the clamping plate 6 moves to the outside of the high-pressure common rail pipe workpiece 2 and the inner rubber ring 20 is sleeved on the surface of the high-pressure common rail pipe workpiece 2, the high-pressure common rail pipe workpiece 2 is positioned and installed.

[0058] S3: The two air pressure detectors 7 can perform pressurized detection on the high-pressure common rail pipe workpiece 2. When the internal pressure of the high-pressure common rail pipe workpiece 2 remains unchanged during the detection process, the quality of the high-pressure common rail pipe workpiece 2 is qualified. The user reversely rotates the threaded component 12 and plugs and replaces the high-pressure common rail pipe workpiece 2 to form a cycle.

[0059] The working principle and use process of the present invention are as follows: when in use, first insert the high-pressure common rail pipe workpiece 2 into the interior of the sleeve 9, and then rotate the threaded component 12. The threaded component 12 rotates and uses the surface threads to push the screw sleeve 13 to move toward each other. During the movement of the screw sleeve 13, the pressure rod 14 is used to squeeze the clamping plate 6, so that the clamping plate 6 swings with the pin shaft inside the connecting block 5 as the axis. When the clamping plate 6 moves to the outside of the high-pressure common rail pipe workpiece 2 and the inner rubber ring 20 is sleeved on the surface of the high-pressure common rail pipe workpiece 2, the effect of positioning and installing the high-pressure common rail pipe workpiece 2 is achieved. At the same time, the two air pressure detectors 7 can perform pressurized detection processing on the high-pressure common rail pipe workpiece 2. When the internal pressure of the high-pressure common rail pipe workpiece 2 remains unchanged during the detection process, the quality of the high-pressure common rail pipe workpiece 2 is qualified. The user rotates the threaded component 12 in the opposite direction and plugs in and replaces the high-pressure common rail pipe workpiece 2 to form a cycle.

[0060] To sum up: the high-pressure common rail pipe air tightness detector and its use method, the transmission structure 4 squeezes the clamping plate 6, so that the clamping plate 6 swings with the pin shaft inside the connecting block 5 as the axis, and when the clamping plate 6 moves to the outside of the high-pressure common rail pipe workpiece 2, the effect of positioning and installing the high-pressure common rail pipe workpiece 2 is achieved. The present invention can improve the structural functionality of the existing high-pressure common rail pipe sealing test device, instead of manually connecting the pipeline and the air pipe to detect the internal flow air pressure, which saves time and effort, and can prevent the connecting pipeline from leaking due to manual plug-in errors during the test.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-pressure common rail air tightness detector, comprising a base plate (1); A high-pressure common rail pipe workpiece (2) disposed on the top of the base plate (1); Features: The top of the bottom plate (1) is provided with a positioning detection structure (3) located outside the high-pressure common rail pipe workpiece (2); The top of the base plate (1) is provided with a transmission structure (4) located on the top of the positioning detection structure (3); The positioning detection structure (3) comprises a connection block (5) arranged on the top of a base plate (1), the connection block (5) being located at the bottom of a high-pressure common rail pipe workpiece (2), the connection block (5) being fixedly connected to the base plate (1), a clamping plate (6) being arranged on the top of the base plate (1), the clamping plate (6) being sleeved on the surface of the connection block (5), the connection block (5) and the clamping plate (6) being movably connected via a pin shaft, the side of the clamping plate (6) away from the connection block (5) extending to the outside of the high-pressure common rail pipe workpiece (2), the inner side of the clamping plate (6) being in contact with the high-pressure common rail pipe workpiece (2) ), the outer side of the clamping plate (6) is connected to an air pressure detector (7), the detection end of the air pressure detector (7) passes through the clamping plate (6) and extends to the inner side of the clamping plate (6), the detection end of the air pressure detector (7) is connected to the outer end of the high-pressure common rail pipe workpiece (2), the top of the base plate (1) is fixedly connected to a bracket (8), the side of the bracket (8) away from the base plate (1) is fixedly connected to a sleeve (9), the sleeve (9) is sleeved on the surface of the high-pressure common rail pipe workpiece (2), and the sleeve (9) and the high-pressure common rail pipe workpiece (2) are slidably connected.

2. A high pressure common rail air tightness detector according to claim 1, Features: The transmission structure (4) comprises a connection frame (10) fixedly connected to the outer side of the base plate (1), an opening (11) is provided on the surface of the clamping plate (6), a threaded component (12) is provided on the top of the base plate (1), the outer end of the threaded component (12) passes through the opening (11) and extends to the inner side of the connection frame (10), the connection frame (10) and the threaded component (12) are movably connected via a bearing, the left and right sides of the surface of the threaded component (12) are both threadedly connected with a screw sleeve (13), the screw sleeve (13) is located on the outer side of the clamping plate (6), the surface of the screw sleeve (13) is fixedly connected with a pressure rod (14), and the side of the pressure rod (14) away from the screw sleeve (13) contacts the outer side of the clamping plate (6).

3. A high pressure common rail air tightness detector according to claim 2, Features: A guide rod (15) is arranged on the top of the bottom plate (1), and the guide rod (15) is located at the bottom of the threaded assembly (12). The left end and the right end of the guide rod (15) respectively penetrate the opening (11) and the screw sleeve (13) and extend to the outside of the screw sleeve (13). The outer end of the guide rod (15) is fixedly connected to the surface of the connecting frame (10), and the guide rod (15) is slidably connected to the screw sleeve (13).

4. A high pressure common rail air tightness detector according to claim 1, Features: A spring plate (16) is fixedly connected to the top of the bottom plate (1), the spring plate (16) is located on the inner side of the connecting block (5), the side of the spring plate (16) away from the bottom plate (1) is in contact with the inner side of the clamping plate (6), and the spring plate (16) is elastic.

5. A high pressure common rail air tightness detector according to claim 1, Features: The surface of the sleeve (9) is fixedly connected to an extension ring (17) sleeved on the surface of the high-pressure common rail pipe workpiece (2); the extension ring (17) is slidably connected to the high-pressure common rail pipe workpiece (2); the bottom of the extension ring (17) is fixedly connected to a connecting rod (18); the side of the connecting rod (18) away from the extension ring (17) is fixedly connected to the surface of the bracket (8).

6. A high pressure common rail air tightness detector according to claim 2, Features: The side of the pressure rod (14) away from the screw sleeve (13) is movably connected to a roller (19) via a pin, and the outer surface of the roller (19) is in contact with the outer side of the clamping plate (6).

7. A high pressure common rail air tightness detector according to claim 1, Features: A rubber ring (20) is fixedly connected to the inner side of the clamping plate (6); the rubber ring (20) is sleeved on the surface of the high-pressure common rail pipe workpiece (2); the rubber ring (20) is elastic; and the rubber ring (20) is slidably connected to the high-pressure common rail pipe workpiece (2).

8. A method for using a high pressure common rail gas tightness detector according to any one of the above claims, Features: The following steps are involved: S1: First, insert the high-pressure common rail pipe workpiece (2) into the interior of the sleeve (9); S2: The threaded component (12) is rotated, and the threaded component (12) rotates and uses the threads on the surface to push the screw sleeve (13) to move toward each other. During the movement of the screw sleeve (13), the pressure rod (14) is used to squeeze the clamping plate (6), so that the clamping plate (6) swings around the pin shaft inside the connecting block (5) as the axis. When the clamping plate (6) moves to the outside of the high-pressure common rail pipe workpiece (2) and the rubber ring (20) on the inside is sleeved on the surface of the high-pressure common rail pipe workpiece (2), the effect of positioning and installing the high-pressure common rail pipe workpiece (2) is achieved; S3: The two air pressure detectors (7) can perform pressure testing on the high-pressure common rail pipe workpiece (2). When the internal pressure of the high-pressure common rail pipe workpiece (2) remains unchanged during the testing process, the quality of the high-pressure common rail pipe workpiece (2) is qualified. The user rotates the threaded component (12) in the reverse direction and inserts and removes the high-pressure common rail pipe workpiece (2) to form a cycle.

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