Airtightness detection mechanism for press-fitting one-way valve processing

Abstract

The application discloses airtightness detection mechanism for processing press-fitting one-way valve, relates to the technical field of airtightness detection, and comprises a detector rack and a first assembly installed on the detector rack, a mounting seat is fixedly installed on the detector rack, a lower positioning hole is formed in the vertical side surface of the mounting seat, a counter top cylinder is arranged on the side, away from the mounting seat, of the lower positioning hole, the counter top cylinder is parallelly and slidingly connected to the detector rack, an end face supporting table is arranged on the side, away from the counter top cylinder, of the mounting seat, and a lifting support is installed on the detector rack; the double-inclined-surface force conversion structure formed by the first assembly, a roller and a second wedge body is adopted to reduce the vertical upward contact reaction force borne by the upper sealing head by three times, rigid impact is obviously reduced under the premise of ensuring the required pressing force in detection, flexible pressing down and elastic buffering are realized, damage of rigid extrusion to the one-way valve workpiece in the press-fitting process is effectively avoided, and the stability and safety of the detection process are improved.

Description

Technical Field

[0001] This invention relates to the field of airtightness testing technology, specifically to an airtightness testing mechanism for press-fit check valve processing. Background Technology

[0002] As a key component in hydraulic, pneumatic, and fluid control systems, the airtightness of check valves directly affects the sealing and reliability of the entire machine. Therefore, after press-fitting, check valves typically require airtightness testing. Existing airtightness testing mechanisms often employ a rigid pressure head that directly presses down to seal the valve, pressing the pressure head against the workpiece's testing end face, and then using inflation and pressure holding to achieve airtightness testing.

[0003] In actual testing, traditional rigid pressing structures have significant shortcomings: Firstly, the rigid contact between the indenter and the workpiece results in a large impact force during pressing, which can easily cause extrusion damage to the thin walls and valve core of the check valve, affecting the product qualification rate. Secondly, the rigid clamping force is not adjustable, making it difficult to adapt to check valves of different materials and specifications, resulting in poor versatility. Thirdly, relying solely on the end-face sealing structure is insufficient to guarantee the sealing of the testing environment. The workpiece is prone to skewing and displacement during clamping, leading to poor sealing, air leakage, and distorted test data, thus affecting the accuracy of the test results.

[0004] In addition, existing testing institutions usually lack the function of monitoring the condition of sealing components. Wear and aging of vulnerable parts such as sealing plugs and sealing rings cannot be detected in time, which can easily lead to misjudgment due to sealing failure. At the same time, there is a lack of real-time monitoring of the workpiece clamping posture, and abnormal states such as eccentricity and tilt of one-way valves cannot be identified in time, which further reduces the accuracy of testing.

[0005] Although some testing institutions have added simple elastic buffer structures or auxiliary sealing structures, the buffering effect is limited, the sealing reliability is insufficient, and it is impossible to achieve controllable reduction of clamping force and precise centering of workpiece, making it difficult to meet the requirements of batch, high-efficiency, and high-precision press-fit check valve air tightness testing.

[0006] Therefore, this invention proposes an airtightness testing mechanism for press-fit check valve processing to solve the above problems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides an airtightness testing mechanism for press-fit check valve processing, thereby solving the problems mentioned in the background section.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an airtightness testing mechanism for press-fitting one-way valve processing, comprising: a testing instrument frame and a first component mounted thereon, wherein a mounting base is fixedly mounted on the testing instrument frame, a lower positioning hole is provided on the vertical side of the mounting base, a counter-rotating cylinder is provided on the side of the lower positioning hole away from the mounting base, the counter-rotating cylinder is slidably connected to the testing instrument frame, an end face support platform is provided on the side of the mounting base away from the counter-rotating cylinder, a lifting bracket is mounted on the testing instrument frame, the lifting bracket is provided on the side of the end face support platform away from the mounting base, a guide rod is vertically provided at the lower part of the lifting bracket, and the first component comprises: an elastic pressure head seat provided on the lifting bracket, the elastic pressure head seat is vertically provided directly above the end face support platform, a mounting shell is installed in the middle of the elastic pressure head seat, a limiting shell is fixedly connected to the bottom of the mounting shell, and the limiting shell is cylindrical; The first component also includes: a top cavity chamber opened at the top of the mounting shell, a middle sliding groove opened in the middle of the mounting shell, and a replacement chamber opened at the bottom of the mounting shell. The top cavity chamber, the middle sliding groove, and the replacement chamber are all in communication with the inner cavity of the limiting shell. It also includes a second component for flexible bonding and sealing.

[0009] Preferably, the first component further includes a movable column that is slidably inserted into the top cavity, the movable column extending downward into the middle sliding groove, an auxiliary spring being sleeved on the outer ring of the movable column, and a first wedge being fixedly connected to the bottom of the movable column. The lower end of the first wedge is set as an inclined surface with an inclination angle of thirty degrees, and an inclined groove A is opened in the middle of the inclined surface of the first wedge.

[0010] Preferably, the first component further includes an annular groove fixedly connected to the inner wall of the replacement chamber. Two annular grooves are provided and symmetrical to the replacement chamber. A retraction guide rod is slidably connected in the annular groove. A roller is rotatably connected to the inclined surface end of the first wedge. Two retraction guide rods are provided and fixedly connected to both sides of the roller respectively. A second wedge is slidably connected in the limiting shell. The second wedge is located below the roller and its side near the roller is an inclined surface with a 60-degree inclination angle. An inclined groove B is formed in the middle of the inclined surface of the second wedge. A guide groove is formed in the middle of the second wedge. A guide post is fixedly connected to the inner wall of the limiting shell. The guide post is slidably connected in the guide groove to form a secondary limit for the vertical sliding of the second wedge.

[0011] Preferably, the movable column is composed of different diameters, and the auxiliary spring is disposed in the middle sliding groove, with its two ends fixedly connected to the first wedge and the top of the inner cavity of the middle sliding groove, respectively.

[0012] Preferably, the annular groove is arranged in a one-third circle, the shrink guide rod is composed of a sleeve and a built-in spring, the outer ring of the roller is provided with a snap ring, and the snap ring is slidably connected in the inclined groove A, and the movement of the roller is limited by the cooperation between the snap ring and the bottom inclined surface of the first wedge, and the inclined groove B and the second wedge limit the movement of the lower end of the roller.

[0013] Preferably, the second component includes an upper sealing head fixedly connected to the bottom of the limiting shell. A buffer spring is fixedly connected to the upper surface of the upper sealing head. Four sets of buffer springs are equidistantly arranged with the center of the upper sealing head as the axis. A piston cylinder is provided in the middle of the buffer spring. The two ends of the piston cylinder are fixedly connected to the bottom of the limiting shell and the top of the upper sealing head, respectively. The four sets of buffer springs are provided and are located in the middle of the four sets of buffer springs. An air tube groove is opened at the bottom of the limiting shell.

[0014] Preferably, the second component also includes a sealing plug installed in the inner cavity of the upper sealing head. The inner circumferential surface of the sealing plug has an installation groove, and an airbag body is engaged in the installation groove. An air plug is fixedly connected to the outer circumferential surface of the airbag body.

[0015] Preferably, the air tube groove is connected to the piston cylinder air chamber.

[0016] Preferably, the mounting groove is arc-shaped and has four equally spaced openings around the inner cavity of the sealing plug, and four air plugs are provided, each connected to a pipe and correspondingly connected to the air pipe groove and piston cylinder.

[0017] Compared with the prior art, the present invention provides an airtightness testing mechanism for press-fit check valve processing, which has the following advantages: 1. By using a double-inclined force conversion structure consisting of a first wedge, a roller, and a second wedge in the first component, the vertical upward contact reaction force on the upper sealing head is reduced by three times. Under the premise of ensuring the clamping force required for testing, the rigid impact is significantly reduced, achieving flexible pressing and elastic buffering. This effectively avoids damage to the one-way valve workpiece caused by rigid extrusion during the pressing process, and improves the stability and safety of the testing process.

[0018] 2. The force transmission method adopts a double-sloping surface combined with roller rolling, which has low friction loss, smooth movement and stable transmission. With the addition of multiple guide and limit structures such as movable column and auxiliary spring, it can prevent the components from deviating or jamming during the movement, ensuring continuous and reliable force conversion and buffering action, and improving the stability and service life of the mechanism. Moreover, by adjusting the slope angle of the two wedges, the reduction ratio of the force can be flexibly changed, which can be adapted to the air tightness detection of one-way valves of different specifications and materials. It has strong versatility, convenient adjustment and wide application range.

[0019] 3. The second component has an air bladder inside the upper sealing head. During the press-fit sealing, the air pressure generated by the squeeze piston cylinder causes the air bladder to expand and radially tighten the outer wall of the one-way valve, further enhancing the sealing effect. Multiple sets of air bladders evenly tighten the outer wall of the one-way valve radially, forming a double sealing structure with the end face seal. This greatly improves the sealing reliability of the one-way valve airtightness test and avoids data distortion caused by poor sealing.

[0020] 4. The airbag body adopts four independent structures evenly distributed around the perimeter, and is inflated separately through independent pipelines. This can achieve uniform and synchronous clamping and positioning of the one-way valve around its perimeter, ensuring that the one-way valve always maintains a centered posture during the testing process. This effectively prevents the one-way valve from tilting or shifting, further ensuring a stable testing environment and accurate testing results. All four airbags are equipped with air pressure sensors, which can monitor the air pressure inside each airbag in real time. On the one hand, changes in air pressure can be used to determine whether the sealing plug has aged or failed, providing intuitive and accurate data for whether the sealing plug needs to be replaced, which is convenient for equipment maintenance. On the other hand, by comparing the air pressure difference between the four airbags, it can be determined whether the one-way valve has become eccentric or tilted, realizing real-time monitoring of the workpiece clamping status, and further improving the detection accuracy and automation level.

[0021] 5. By combining the force-reducing elastic buffer structure of the first component with the airbag-assisted sealing and centering structure of the second component, flexible buffering and damage prevention are achieved during the press-fitting process, while high-reliability sealing and high-precision centering are achieved at the testing station. It also has the functions of monitoring the condition of the seal and monitoring the clamping of the workpiece, which greatly improves the stability, accuracy and intelligence level of the air tightness test of the one-way valve. It is suitable for batch, efficient and high-precision press-fitting one-way valve air tightness test operations. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the overall structure of the present invention; Figure 3 This is a partial cross-sectional view of the first component of the present invention; Figure 4 This is a cross-sectional view of the first component of the present invention; Figure 5 This is an internal structural view of the first component of the present invention; Figure 6 This is a disassembled structural diagram of the first and second components of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A in the middle; Figure 8 This is a disassembled structural diagram of the second component of the present invention.

[0023] In the picture: 11. Testing instrument frame; 21. Mounting base; 22. Lower positioning hole; 23. Anti-jacking cylinder; 24. End face support platform; 25. Lifting bracket; 31. Elastic pressure head seat; 3021. Mounting shell; 3022. Limiting shell; 33. Top chamber; 34. Middle sliding groove; 35. Replacement chamber; 36. Movable column; 37. Auxiliary spring; 38. First wedge; 39. Inclined groove A; 310. Roller; 311. Retraction guide rod; 312. Annular groove; 313. Second wedge; 314. Inclined groove B; 315. Guide groove; 316. Guide column; 41. Upper sealing head; 42. Buffer spring; 43. Piston cylinder; 44. Air tube groove; 45. Sealing plug; 46. Mounting groove; 47. Airbag body; 48. Air plug. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0026] Example Please refer to Figures 1 to 6 As shown: To address the problems mentioned in the technical solutions, this invention provides an airtightness testing mechanism for press-fitted one-way valves, comprising: a testing instrument frame 11 and a first component mounted thereon. A mounting base 21 is fixedly mounted on the testing instrument frame 11. A lower positioning hole 22 is provided on the vertical side of the mounting base 21. A counter-pressure cylinder 23 is provided on the side of the lower positioning hole 22 away from the mounting base 21. The counter-pressure cylinder 23 is slidably connected to the testing instrument frame 11. A sealing head is provided at the output end of the counter-pressure cylinder 23. An end face support platform 24 is provided on the side of the mounting base 21 away from the counter-pressure cylinder 23. The end face support platform 24 is used for... A rack tensioner is placed, and a one-way valve is placed inside the rack tensioner. A lifting bracket 25 is installed on the detector frame 11. The lifting bracket 25 is located on the side of the end support platform 24 away from the mounting base 21. A guide rod is vertically installed at the lower part of the lifting bracket 25. The first component includes: an elastic pressure head seat 31 installed on the lifting bracket 25. The elastic pressure head seat 31 is slidably connected to the guide rod. The elastic pressure head seat 31 is vertically installed directly above the end support platform 24. A mounting shell 3021 is installed in the middle of the elastic pressure head seat 31. A limiting shell 3022 is fixedly connected to the bottom of the mounting shell 3021. The limiting shell 3022 is cylindrical. The first component also includes: a top cavity 33 opened at the top of the mounting shell 3021, a middle sliding groove 34 opened in the middle of the mounting shell 3021, and a replacement chamber 35 opened at the bottom of the mounting shell 3021. The top cavity 33, the middle sliding groove 34, and the replacement chamber 35 are all in communication with the inner cavity of the limiting shell 3022. The diameter of the top cavity 33 is larger than that of the middle sliding groove 34. The diameter of the prime number replacement chamber 35 is the same as that of the top cavity 33. The diameter of the inner cavity of the limiting shell 3022 is smaller than that of the replacement chamber 35. The specific values ​​can be set according to the requirements. It also includes a second component for flexible sealing, with an end support platform 24 connected to an air intake detection device for introducing detection gas into the one-way valve under test and collecting the pressure change value during the inflation process or the pressure decay value during the pressure holding process. The intake detection equipment is connected to a pressure relief switching device, which is used to cut off the air supply and quickly depressurize the detection circuit after the inflation, pressure holding and judgment are completed.

[0027] The first component also includes a movable column 36 that is slidably inserted into the top cavity 33. The movable column 36 extends downward into the middle sliding groove 34. An auxiliary spring 37 is sleeved on the outer ring of the movable column 36. The auxiliary spring 37 is used to provide elastic buffer for the movement and reset of the first wedge 38. The bottom of the movable column 36 is fixedly connected to the first wedge 38. The first wedge 38 is used to cooperate with the second wedge 313 to convert the force. The lower end of the first wedge 38 is set as an inclined surface with an inclination angle of thirty degrees. An inclined groove A39 is opened in the middle of the inclined surface of the first wedge 38.

[0028] The first component also includes an annular groove 312 fixedly connected to the inner wall of the replacement chamber 35. The annular groove 312 cooperates with the shrinkage guide rod 311 to limit and guide the axial movement of the roller 310. Under the action of the shrinkage guide rod 311, the roller 310 moves axially within the replacement chamber 35 while ensuring its stable movement. Two annular grooves 312 are provided and symmetrically arranged within the replacement chamber 35. The shrinkage guide rod 311 is slidably connected within the annular groove 312. The roller 310 is rotatably connected to the inclined end of the first wedge 38. The roller 310 is mainly used to convert the vertical force applied by the second wedge 313 into an axial force and apply it in the opposite direction to the first wedge 38. During the conversion process, the force is reduced, providing a shock absorption effect. Two shrinkage guide rods 311 are provided and fixedly arranged. A second wedge 313 is slidably connected to both sides of the roller 310 and inside the limiting shell 3022. The second wedge 313 is located below the roller 310 and its side near the roller 310 is an inclined surface with a 60-degree inclination angle. An inclined groove B314 is formed in the middle of the inclined surface of the second wedge 313, and a guide groove 315 is formed in the middle of the second wedge 313. The guide groove 315 moves vertically up and down with the second wedge 313 inside the limiting shell 3022. Under the limiting of the guide groove 315 by the guide post 316, the second wedge 313 is prevented from axially deflecting inside the limiting shell 3022. A guide post 316 is fixedly connected to the inner wall of the limiting shell 3022 and is slidably connected to the guide groove 315, forming a secondary limiting of the axial movement of the second wedge 313.

[0029] The movable column 36 is composed of different diameters, and the auxiliary spring 37 is set in the middle slide groove 34, with its two ends fixedly connected to the first wedge 38 and the top of the inner cavity of the middle slide groove 34, respectively.

[0030] The annular groove 312 is arranged in a one-third circle. The retraction guide rod 311 is composed of a sleeve and an internal spring. The outer ring of the roller 310 is provided with a snap ring, which is slidably connected in the inclined groove A39. The snap ring and the bottom inclined surface of the first wedge 38 cooperate to limit the movement of the roller 310. The inclined groove B314 and the second wedge 313 limit the movement of the lower end of the roller 310.

[0031] A further embodiment: Please refer to Figures 7 to 8 As shown: The second component includes an upper sealing head 41 fixedly connected to the bottom of the limiting shell 3022. The upper sealing head 41 is used to contact the end face support platform 24 and surrounds the outer ring of the one-way valve to be tested. Under the interaction force between the end face support platform 24 and the upper sealing head 41, the buffer spring 42 and the piston cylinder 43 are compressed. The gas in the piston cylinder 43 is compressed and transmitted to the air plug 48 through the pipeline installed in the air pipe groove 44. The air plug 48 then delivers the gas to the airbag body 47 to inflate it, further sealing the one-way valve testing environment. The four airbag bodies 47 correspond to the four sets of buffer springs 42 and piston cylinders 43, respectively inflating and expanding, and in the air... Under the action of the pressure sensor, it is ensured that the one-way valve does not deviate or tilt during detection, thus avoiding abnormal detection results. The upper sealing head 41 is set below the elastic pressure head seat 31. A buffer spring 42 is fixedly connected to the upper surface of the upper sealing head 41. Four sets of buffer springs 42 are equidistantly arranged with the center of the upper sealing head 41 as the axis. A piston cylinder 43 is set in the middle of the buffer spring 42. The two ends of the piston cylinder 43 are fixedly connected to the bottom of the limiting shell 3022 and the top of the upper sealing head 41, respectively. Four sets of buffer springs 42 are set and are located in the middle of the four sets of buffer springs 42. An air pipe groove 44 is opened at the bottom of the limiting shell 3022. The air pipe groove 44 is used to install the air pipe.

[0032] The second component also includes a sealing plug 45 installed in the inner cavity of the upper sealing head 41. The inner ring surface of the sealing plug 45 has an installation groove 46, and an airbag body 47 is snapped into the installation groove 46. An air plug 48 is fixedly connected to the outer ring surface of the airbag body 47, and the airbag body 47 is connected to the air pressure sensor.

[0033] The air tube groove 44 is connected to the air chamber of the piston cylinder 43.

[0034] The mounting groove 46 is arc-shaped and has four equally spaced openings around the inner cavity of the sealing plug 45. There are four air plugs 48, which are respectively connected to pipes and communicate with the air pipe groove 44 and the piston cylinder 43.

[0035] Among them, the sealing plug 45 is adapted to the one-way valve detection port.

[0036] When the elastic pressure head seat 31 is pressed down, a flexible fit and seal is achieved through the cooperation of the first component and the second component.

[0037] When the elastic pressure head seat 31 presses downward in conjunction with the first component, the upper sealing head 41 comes into contact with the one-way valve detection port on the end face support platform 24. Under the mutual resistance force, the end face support platform 24 applies an upward vertical force F1 to the upper sealing head 41. Under the transmission of force, the upper sealing head 41 applies a vertical upward force to the second wedge 313. Since the second wedge 313 is in contact with the roller 310, and the roller 310 is in contact with the first wedge 38, and the second wedge 313 applies an axial force F2 to the roller 310, then F2 = F1 * tanB / tanA; where A is the inclination angle of the second wedge 313 (60 degrees), B is the inclination angle of the first wedge 38 (30 degrees), and F2 = F1 / 3, the force is reduced. Specifically, the inclination angles of the second wedge 313 and the first wedge 38 can be adjusted according to actual needs to adjust the force variation ratio.

[0038] The working principle of all the content in the above embodiments is as follows: In use, the one-way valve workpiece to be tested is placed on the end face support platform 24. The lifting bracket 25 drives the elastic pressure head seat 31 to move downward as a whole, so that the first component and the second component move down synchronously until the upper sealing head 41 is in contact with the one-way valve test port on the end face support platform 24.

[0039] When the upper sealing head 41 comes into contact with the one-way valve detection port, the end face support platform 24 generates an upward vertical reaction force F1 on the upper sealing head 41. This force is transmitted upward to the second wedge 313, causing the second wedge 313 to slide upward relative to the limiting shell 3022. The upper end of the second wedge 313 is a 60-degree inclined surface, which rolls in cooperation with the roller 310, converting the upward vertical force into a lateral force. The upper end of the roller 310 is in contact with the 30-degree inclined surface of the first wedge 38, and the roller 310 converts the lateral force back into an upward axial force, which acts on the first wedge 38.

[0040] According to the force transmission relationship on an inclined plane: F2=F1*(tanB / tanA)=F1*(tan30° / tan60°)=F1 / 3; That is, the upward force F2 acting on the first wedge 38 is only one-third of the original contact force F1, so that the downward contact force is reduced by a ratio of 1:3. While ensuring the sealing and tightening, it plays a significant role in elastic buffering and shock absorption, avoiding rigid impact damage to the one-way valve workpiece.

[0041] The first wedge 38 moves upward under force, compressing the auxiliary spring 37. The movable column 36 slides upward along the top cavity 33 and the middle sliding groove 34. With the guidance and limiting effect of the retraction guide rod 311 and the annular groove 312, the first wedge 38, the roller 310, and the second wedge 313 move smoothly and without deviation during the force conversion process. The guide groove 315 on the second wedge 313 cooperates with the guide column 316 on the inner wall of the limiting shell 3022 to further limit the circumferential deflection of the second wedge 313 and ensure stable and reliable force transmission.

[0042] During the continuous downward sealing process of the elastic pressure head seat 31, the upper sealing head 41 and the end face support platform 24 are squeezed against each other and slide into the limiting shell 3022. The distance between the upper sealing head 41 and the limiting shell 3022 is shortened, thereby compressing the buffer spring 42. At the same time, the gas in the inner cavity of the piston cylinder 43 is squeezed and sent into the air bladder 47 inside the sealing plug 45 through the pipeline in the air pipe groove 44 and the air plug 48, causing the air bladder 47 to expand. It radially clamps and positions the outer wall of the one-way valve, realizing secondary auxiliary sealing and centering of the testing station, preventing the one-way valve from deflecting or shifting during the testing process, and ensuring a stable airtightness testing environment.

[0043] And under the connection between the airbag body 47 and the air pressure sensor, it feeds back whether the air pressure expansion state inside each airbag body 47 is normal, so as to serve as a data reference for whether the sealing plug 45 needs to be replaced, and to feed back whether the one-way valve to be tested in the middle is in the centered state, or whether it is offset, causing the airbag body 47 on one side to be squeezed, resulting in abnormal internal air pressure.

[0044] After sealing, the external air intake testing equipment introduces test gas into the one-way valve through the end face support platform 24 to perform inflation and pressure holding operations, and collects pressure data in real time. By monitoring the pressure decay value during the pressure holding stage, it determines whether the one-way valve's airtightness is qualified. After the test is completed, the pressure relief switching device cuts off the gas source and quickly depressurizes the test gas path. Then, the lifting bracket 25 drives the elastic pressure head seat 31 to move upward, the auxiliary spring 37 and the buffer spring 42 reset, the airbag body 47 deflates and retracts, and the one-way valve that has completed the test can be removed, completing one airtightness test process.

[0045] Please refer to the above work process. Figures 1 to 8 .

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An airtightness testing mechanism for press-fitted check valve processing, comprising: The instrument frame (11) and the first component mounted thereon are provided. A mounting base (21) is fixedly mounted on the instrument frame (11). A lower positioning hole (22) is provided on the vertical side of the mounting base (21). A counter-rotating cylinder (23) is provided on the side of the lower positioning hole (22) away from the mounting base (21). The counter-rotating cylinder (23) is slidably connected to the instrument frame (11). An end face support platform (24) is provided on the side of the mounting base (21) away from the counter-rotating cylinder (23). A lifting bracket (25) is mounted on the instrument frame (11). The lifting bracket (25) is located on the side of the end support platform (24) away from the mounting base (21), and a guide rod is vertically arranged at the lower part of the lifting bracket (25). The first component includes: an elastic pressure head seat (31) arranged on the lifting bracket (25), the elastic pressure head seat (31) is vertically arranged directly above the end support platform (24), and a mounting shell (3021) is installed in the middle of the elastic pressure head seat (31). A limiting shell (3022) is fixedly connected to the bottom of the mounting shell (3021), and the limiting shell (3022) is cylindrical. The first component also includes: a top cavity (33) opened at the top of the mounting shell (3021), a middle sliding groove (34) opened in the middle of the mounting shell (3021), and a replacement chamber (35) opened at the bottom of the mounting shell (3021). The top cavity (33), the middle sliding groove (34) and the replacement chamber (35) are all in communication with the inner cavity of the limiting shell (3022). It also includes a second component for flexible bonding and sealing.

2. The airtightness testing mechanism for press-fitted one-way valve processing according to claim 1, characterized in that: The first component also includes a movable column (36) that is slidably inserted into the top cavity (33). The movable column (36) extends downward into the middle sliding groove (34). An auxiliary spring (37) is sleeved on the outer ring of the movable column (36). A first wedge (38) is fixedly connected to the bottom of the movable column (36). The lower end of the first wedge (38) is set as an inclined surface with an inclination angle of thirty degrees. An inclined groove A (39) is opened in the middle of the inclined surface of the first wedge (38).

3. The airtightness testing mechanism for press-fitted check valve processing according to claim 2, characterized in that: The first component also includes an annular groove (312) fixedly connected to the inner wall of the replacement chamber (35). There are two annular grooves (312) symmetrically arranged in the replacement chamber (35). A shrinkage guide rod (311) is slidably connected in the annular groove (312). A roller (310) is rotatably connected to the inclined end of the first wedge (38). There are two shrinkage guide rods (311) respectively fixedly connected to both sides of the roller (310). A second wedge (313) is slidably connected in the limiting shell (3022). The second wedge (313) is located below the roller (310) and its side near the roller (310) is a 60-degree inclined surface. An inclined groove B (314) is provided in the middle of the inclined surface of the second wedge (313). A guide groove (315) is provided in the middle of the second wedge (313). A guide post (316) is fixedly connected to the inner wall of the limiting shell (3022). The guide post (316) is slidably connected in the guide groove (315) to form a secondary limit for the vertical sliding of the second wedge (313).

4. The airtightness testing mechanism for press-fitted one-way valve processing according to claim 2, characterized in that: The movable column (36) is composed of different diameters, and the auxiliary spring (37) is set in the middle slide groove (34), with its two ends fixedly connected to the first wedge (38) and the top of the inner cavity of the middle slide groove (34), respectively.

5. The airtightness testing mechanism for press-fitted one-way valve processing according to claim 3, characterized in that: The annular groove (312) is arranged in a one-third circle. The retraction guide rod (311) is composed of a sleeve and an internal spring. The outer ring of the roller (310) is provided with a snap ring, and the snap ring is slidably connected in the inclined groove A (39). The snap ring and the bottom inclined surface of the first wedge (38) cooperate to limit the movement of the roller (310). The inclined groove B (314) and the second wedge (313) limit the movement of the lower end of the roller (310).

6. The airtightness testing mechanism for press-fitted one-way valve processing according to claim 1, characterized in that: The second component includes an upper sealing head (41) fixedly connected to the bottom of the limiting shell (3022). A buffer spring (42) is fixedly connected to the upper surface of the upper sealing head (41). Four sets of buffer springs (42) are equidistantly arranged with the center of the upper sealing head (41) as the axis. A piston cylinder (43) is provided in the middle of the buffer spring (42). The two ends of the piston cylinder (43) are fixedly connected to the bottom of the limiting shell (3022) and the top of the upper sealing head (41) respectively. There are four sets of buffer springs (42) and they are located in the middle of the four sets of buffer springs (42). An air tube groove (44) is opened at the bottom of the limiting shell (3022).

7. The airtightness testing mechanism for press-fitted one-way valve processing according to claim 6, characterized in that: The second component also includes a sealing plug (45) installed in the inner cavity of the upper sealing head (41). The inner ring surface of the sealing plug (45) is provided with an installation groove (46). An airbag body (47) is snapped into the installation groove (46). An air plug (48) is fixedly connected to the outer ring surface of the airbag body (47).

8. The airtightness testing mechanism for press-fitted check valve processing according to claim 6, characterized in that: The air duct groove (44) is connected to the air chamber of the piston cylinder (43).

9. The airtightness testing mechanism for press-fitted one-way valve processing according to claim 7, characterized in that: The mounting groove (46) is arc-shaped and has four openings equidistant from each other around the inner cavity of the sealing plug (45). There are four air plugs (48), which are respectively connected to pipes and correspondingly connected to the air pipe groove (44) and piston cylinder (43).

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