A leak-proof screw airtightness testing machine

Abstract

This utility model discloses an airtightness testing machine for vent screws, relating to the technical field of screw manufacturing equipment. It includes a testing table with a clamping mechanism and a testing mechanism. The clamping mechanism comprises a movable slide plate and clamping components. The movable slide plate slides horizontally on the top of the testing table. Multiple sets of clamping components are provided, each including a base, two supports, and two pressure rods. An air injection component includes a support frame, a first telescopic rod, an air injection head, an air pump, and a pressure sensor. Through the cooperation between the base, supports, pressure rods, support frame, first telescopic rod, air injection head, air pump, and pressure sensor, the airtightness testing machine can quickly and stably clamp the vent screws and complete air injection and pressure monitoring. By simultaneously testing multiple vent screws, the testing efficiency of vent screws in mass production is significantly improved. Furthermore, the entire testing process is unaffected by operator subjectivity, ensuring the accuracy and consistency of the testing.

Description

Technical Field

[0001] This utility model relates to the technical field of screw manufacturing equipment, specifically to an airtightness testing machine for exhaust screws. Background Technology

[0002] As a key component for achieving gas discharge and pressure balance, the integrity of the internal venting structure of the vent screw directly affects the safety and stability of equipment operation. Currently, most vent screws on the market adopt a cylindrical body design with an internal axial vent hole. Installation and fixation are achieved through a front external thread engaging with a stepped hole, while the rear radial vent hole connects with the axial vent hole to ensure smooth gas discharge.

[0003] Traditional testing methods mainly rely on manual operation. The specific operation process is as follows: block one of the radial vent holes and the axial vent hole, then inject gas into the unblocked vent hole, and then check whether the gas in the vent screw leaks to determine the airtightness of the vent screw.

[0004] First, the manual operation process is cumbersome, requiring manual sealing and ventilation testing one by one. For mass-produced exhaust screws, the testing efficiency is extremely low, which seriously affects the production schedule. Second, the test results are greatly affected by the subjective factors of the operators. Different personnel have different sealing strength, ventilation time and judgment standards for gas leaks, which can easily lead to missed detections and misjudgments, making it impossible to guarantee the accuracy and consistency of the test. Utility Model Content

[0005] This utility model provides an airtightness testing machine for exhaust screws, which can solve the problems of cumbersome manual operation procedures in the prior art, which require manual sealing and ventilation testing one by one. For exhaust screws produced in large quantities, the testing efficiency is extremely low, which seriously affects the production progress. In addition, the test results are greatly affected by the subjective factors of the operator, which can easily lead to missed detections and misjudgments, and cannot guarantee the accuracy and consistency of the test.

[0006] An airtightness testing machine for vent screws includes a testing platform. The testing platform is equipped with a clamping mechanism for holding vent screws and a testing mechanism for testing the airtightness of the vent screws. The clamping mechanism includes a movable slide plate and clamping components. The movable slide plate is slidably disposed on the top of the testing platform in a horizontal direction. Multiple sets of clamping components are arranged in a matrix on the top of the movable slide plate. Each set of clamping components includes a base, two supports, and two pressure rods. The base is fixedly connected to the movable slide plate. The two supports are symmetrically arranged on both sides of the base. The two pressure rods are slidably connected to their respective supports. The testing mechanism includes a frame, a movable pressure plate, and an injection component. The frame is fixedly connected to the testing platform. The movable pressure plate is slidably connected to the frame in a vertical direction. The injection component is used to inject gas into the vent screw. The air injection assembly includes a support frame, a first telescopic rod, an air injection head, an air pump, and a pressure sensor. The support frame is fixedly connected to the movable slide plate. The first telescopic rod is fixedly connected to the support frame in a horizontal state. The air injection head is fixedly connected to the telescopic end of the first telescopic rod, and the output end of the air pump is connected to the air injection head. The detection end of the pressure sensor is located inside the air injection head.

[0007] According to one embodiment of this utility model, the air injection assembly further includes a sealing ring. The air injection head has a through hole, one end of which is connected to the output end of an air pump, and the sealing ring is fixedly disposed at the other end of the through hole. The sealing ring is made of rubber. The first telescopic rod is an electric push rod.

[0008] According to one embodiment of this utility model, the side of the bracket is provided with a horizontal sliding groove. One end of the pressure rod is slidably connected to the sliding groove, and the other end of the pressure rod is fixedly provided with a pressure block. The side of the pressure block is provided with an arc-shaped groove, and the top of the pressure block is provided with an inclined surface. An anti-disengagement retaining ring is fixedly provided at the opening of the sliding groove. A spring is fixedly provided inside the sliding groove. One end of the spring abuts against the pressure rod, and the other end of the spring abuts against the bottom of the sliding groove.

[0009] According to one embodiment of this utility model, the detection mechanism further includes a second telescopic rod and a pressure column. The second telescopic rod is fixedly connected to the frame, and its telescopic end is fixedly connected to a movable pressure plate. The pressure column is fixedly disposed at the bottom of the movable pressure plate, and an clearance hole is provided at the bottom of the pressure column. The second telescopic rod is an electric push rod.

[0010] The advantages of this utility model compared to the prior art are:

[0011] Through the coordinated operation of the base, bracket, pressure rod, support frame, first telescopic rod, air injection head, air pump, and air pressure sensor, the air tightness testing machine can quickly and stably clamp the vent screws and complete air injection and air pressure monitoring. Simultaneously, it can rapidly and continuously test multiple vent screws, significantly shortening the testing time for a single vent screw and substantially improving the testing efficiency of vent screws in mass production, effectively ensuring production schedules. Furthermore, the entire testing process is unaffected by operator subjectivity, avoiding missed detections and misjudgments caused by differences in sealing force, ventilation time, and judgment standards. It can accurately and consistently determine the air tightness of vent screws, ensuring product quality.

[0012] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0013] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0014] Figure 1 This is a three-dimensional structural diagram of the exhaust screw.

[0015] Figure 2 This is a three-dimensional structural diagram of an airtightness testing machine for exhaust screws.

[0016] Figure 3 This is a three-dimensional structural diagram of the clamping mechanism in this utility model.

[0017] Figure 4 This is a three-dimensional structural cross-sectional view of the detection mechanism in this utility model.

[0018] Figure 5 This is a three-dimensional structural diagram of the pressure column in this utility model.

[0019] Figure 6 This is a partial sectional view of the three-dimensional structure of the clamping mechanism in this utility model.

[0020] The reference numerals in the figures include:

[0021] 1. Vent screw; 2. Testing table; 3. Clamping mechanism; 4. Testing mechanism; 5. Movable sliding plate; 6. Clamping assembly; 7. Base; 8. Bracket; 9. Pressure rod; 10. Frame; 11. Movable pressure plate; 12. Air injection assembly; 13. Support frame; 14. First telescopic rod; 15. Air injection head; 16. Sealing ring; 17. Slide groove; 18. Pressure block; 19. Arc-shaped groove; 20. Inclined surface; 21. Anti-detachment ring; 22. Spring; 23. Second telescopic rod; 24. Pressure column; 25. Axial vent hole; 26. Radial vent hole. Detailed Implementation

[0022] The specific embodiments of this utility model are described in detail below, but it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0023] First Embodiment

[0024] Please see Figures 1 to 6 As shown, an airtightness testing machine for vent screws includes a testing platform 2. The testing platform 2 is equipped with a clamping mechanism 3 for clamping vent screws 1 and a testing mechanism 4 for testing the airtightness of vent screws 1. The clamping mechanism 3 includes a movable slide plate 5 and a clamping assembly 6. The movable slide plate 5 is slidably disposed on the top of the testing platform 2 in a horizontal direction. Multiple sets of clamping assemblies 6 are arranged in a matrix on the top of the movable slide plate 5. Each set of clamping assemblies 6 includes a base 7, two supports 8 and two pressure rods 9. The base 7 is fixedly connected to the movable slide plate 5. The two supports 8 are symmetrically arranged on both sides of the base 7. The two pressure rods 9 are slidably connected to the corresponding supports 8. The testing mechanism 4 includes a frame 10, a movable pressure plate 11 and an injection assembly 12. The frame 10 is fixedly connected to the testing platform 2. The movable pressure plate 11 is slidably connected to the frame 10 in a vertical direction. The injection assembly 12 is used to inject gas into the vent screw 1. The air injection assembly 12 includes a support frame 13, a first telescopic rod 14, an air injection head 15, an air pump, and an air pressure sensor. The support frame 13 is fixedly connected to the movable slide plate 5. The first telescopic rod 14 is horizontally fixedly connected to the support frame 13. The air injection head 15 is fixedly connected to the telescopic end of the first telescopic rod 14, and the output end of the air pump is connected to the air injection head 15. The detection end of the air pressure sensor is located inside the air injection head 15.

[0025] First, place the vent screw 1 to be tested on the base 7 of the clamping mechanism 3. Move it below the movable pressure plate 11 by operating the movable slide plate 5. Then adjust the two pressure rods 9, using the sliding cooperation between the pressure rods 9 and the bracket 8 to firmly clamp the vent screw 1. During testing, the movable pressure plate 11 moves vertically on the frame 10 and presses against the top of the vent screw 1, sealing the axial vent hole 25 against the base 7. The air injection assembly 12 starts working, the first telescopic rod 14 extends horizontally, driving the air injection head 15 to align with the radial vent hole 26 of the vent screw 1. The air pump starts, injecting gas into the vent screw 1. At this time, the air pressure sensor monitors the air pressure change in the air injection head 15 (i.e., inside the vent screw 1) in real time. If the vent screw 1 is airtight, the air pressure will remain relatively stable; if there is a leak, the air pressure will drop. The air pressure sensor transmits the detected air pressure data to the control system to determine whether the airtightness of the vent screw 1 is qualified.

[0026] Through the cooperation of the base 7, bracket 8, pressure rod 9, support frame 13, first telescopic rod 14, air injection head 15, air pump and air pressure sensor, the air tightness testing machine can quickly and stably clamp the vent screw 1 and complete the air injection and air pressure monitoring. At the same time, it can quickly and continuously test multiple vent screws 1, which greatly shortens the testing time of a single vent screw 1, significantly improves the testing efficiency of vent screw 1 in mass production, and effectively ensures the production schedule.

[0027] Second Embodiment

[0028] Based on the first embodiment, the air injection assembly 12 further includes a sealing ring 16. The air injection head 15 has a through hole, one end of which is connected to the output end of the air pump, and the sealing ring 16 is fixedly disposed at the other end of the through hole. The sealing ring 16 is made of rubber. The first telescopic rod 14 is an electric push rod.

[0029] When the airtightness testing machine is working, the vent screw 1 is first placed on the clamping mechanism 3 and clamped and fixed. The movable slide plate 5 moves the vent screw 1 to below the movable pressure plate 11. The movable pressure plate 11 presses down to seal the axial vent hole 25 with the base 7. When the air injection assembly 12 is working, the first telescopic rod 14 extends, so that the air injection head 15 aligns with the radial vent hole 26 of the vent screw 1. At this time, the rubber sealing ring 16 at the other end of the through hole of the air injection head 15 is tightly fitted with the vent screw 1. The air pump starts, and gas is injected into the vent screw 1 through the through hole. The air pressure sensor monitors the air pressure change in real time, and the airtightness of the vent screw 1 is judged based on whether the air pressure is stable.

[0030] By setting a rubber sealing ring 16 on the gas injection head 15, the sealing performance when the gas injection head 15 is connected to the radial vent hole 26 of the vent screw 1 is enhanced, effectively preventing gas leakage from the connection point and improving the accuracy of the test. The use of an electric push rod as the first telescopic rod 14 can precisely control the telescopic distance and force of the gas injection head 15, making the connection between the gas injection head 15 and the vent screw 1 more accurate and stable, further improving the reliability and consistency of the test.

[0031] Third Embodiment

[0032] Based on the first embodiment, the side of the bracket 8 is provided with a horizontal sliding groove 17. One end of the pressure rod 9 is slidably connected to the sliding groove 17, and the other end of the pressure rod 9 is fixedly provided with a pressure block 18. The side of the pressure block 18 is provided with an arc-shaped groove 19, and the top of the pressure block 18 is provided with an inclined surface 20. An anti-detachment retaining ring 21 is fixedly provided at the opening of the sliding groove 17. A spring 22 is fixedly provided inside the sliding groove 17. One end of the spring 22 abuts against the pressure rod 9, and the other end of the spring 22 abuts against the bottom of the sliding groove 17.

[0033] When the airtightness testing machine is working, the vent screw 1 is first placed on the base 7 of the clamping mechanism 3. One end of the pressure rod 9 slides in the groove 17 on the side of the bracket 8. Under the action of the spring 22, the pressure block 18 at the other end of the pressure rod 9 can adaptively fit the vent screw 1. The arc-shaped groove 19 on the side of the pressure block 18 fits against the outer wall of the vent screw 1. The inclined surface 20 on the top of the pressure block 18 facilitates the insertion of the vent screw 1. The anti-disengagement ring 21 prevents the pressure rod 9 from coming out of the groove 17. The movable slide plate 5 moves the vent screw 1 under the movable pressure plate 11. After the movable pressure plate 11 presses down to achieve a seal, the air injection assembly 12 performs an air injection test. The airtightness of the vent screw 1 is judged based on the air pressure change monitored by the air pressure sensor.

[0034] Through the cooperation of the sliding groove 17 on the side of the bracket 8 and the pressure rod 9, as well as the setting of the spring 22, the pressure block 18 can adaptively clamp the vent screws 1 of different sizes, improving the versatility of the equipment; the arc-shaped groove 19 on the side of the pressure block 18 and the inclined surface 20 on the top not only make the clamping more stable, but also facilitate the placement of the vent screws 1; the anti-disengagement ring 21 prevents the pressure rod 9 from coming out, ensuring the stability of the clamping mechanism 3, thereby improving the working efficiency and reliability of the entire airtightness testing machine.

[0035] Fourth embodiment

[0036] Based on the first embodiment, the detection mechanism 4 further includes a second telescopic rod 23 and a pressure column 24. The second telescopic rod 23 is fixedly connected to the frame 10, and the telescopic end of the second telescopic rod 23 is fixedly connected to the movable pressure plate 11. The pressure column 24 is fixedly disposed at the bottom of the movable pressure plate 11, and an avoidance hole is provided at the bottom of the pressure column 24. The second telescopic rod 23 is an electric push rod.

[0037] When the airtightness testing machine is running, the vent screw 1 is first clamped and fixed, and the movable slide plate 5 moves it below the movable pressure plate 11. The second telescopic rod 23 drives the movable pressure plate 11 to press down, and the pressure column 24 at the bottom of the movable pressure plate 11 descends accordingly until it contacts the top of the vent screw 1. Since the bottom of the pressure column 24 has a clearance hole, it can avoid the tip of the top of the vent screw 1, preventing damage to the vent screw 1. At the same time, the pressure column 24 abuts against the top of the vent screw 1, achieving a good seal between the axial vent hole 25 and the base 7. After the air injection head 15 of the air injection assembly 12 is connected to the radial vent hole 26 of the vent screw 1, the air pump injects gas, and the air pressure sensor monitors the air pressure change to determine the airtightness of the vent screw 1.

[0038] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A leak-proof screw airtightness testing machine, comprising a testing table (2), characterized in that, The testing platform (2) is provided with a clamping mechanism (3) for clamping the exhaust screw (1) and a testing mechanism (4) for testing the airtightness of the exhaust screw (1). The clamping mechanism (3) includes a movable slide plate (5) and a clamping assembly (6). The movable slide plate (5) is slidably disposed on the top of the testing platform (2) in the horizontal direction. The clamping assembly (6) is provided in multiple sets and arranged in a matrix on the top of the movable slide plate (5). Each set of the clamping assembly (6) includes a base (7), two brackets (8) and two pressure rods (9). The base (7) is fixedly connected to the movable slide plate (5). The two brackets (8) are symmetrically arranged on both sides of the base (7). The two pressure rods (9) are slidably connected to the corresponding brackets (8). The detection mechanism (4) includes a frame (10), a movable pressure plate (11), and an air injection assembly (12). The frame (10) is fixedly connected to the detection table (2). The movable pressure plate (11) is slidably connected to the frame (10) in the vertical direction. The air injection assembly (12) is used to inject gas into the exhaust screw (1).

2. The airtightness testing machine for exhaust screws as described in claim 1, characterized in that, The air injection assembly (12) includes a support frame (13), a first telescopic rod (14), an air injection head (15), an air pump, and an air pressure sensor. The support frame (13) is fixedly connected to the movable slide plate (5). The first telescopic rod (14) is fixedly connected to the support frame (13) in a horizontal state. The air injection head (15) is fixedly connected to the telescopic end of the first telescopic rod (14), and the output end of the air pump is connected to the air injection head (15). The detection end of the air pressure sensor is located inside the air injection head (15).

3. The airtightness testing machine for exhaust screws as described in claim 2, characterized in that, The air injection assembly (12) also includes a sealing ring (16). The air injection head (15) has a through hole. One end of the through hole is connected to the output end of the air pump. The sealing ring (16) is fixedly installed at the other end of the through hole.

4. The airtightness testing machine for exhaust screws as described in claim 3, characterized in that, The sealing ring (16) is made of rubber.

5. The airtightness testing machine for exhaust screws as described in claim 2, characterized in that, The first telescopic rod (14) is an electric push rod.

6. The airtightness testing machine for exhaust screws as described in claim 1, characterized in that, The side of the bracket (8) is provided with a horizontal sliding groove (17), one end of the pressure rod (9) is slidably connected to the sliding groove (17), the other end of the pressure rod (9) is fixedly provided with a pressure block (18), and the side of the pressure block (18) is provided with an arc-shaped groove (19), and the top of the pressure block (18) is provided with an inclined surface (20).

7. The airtightness testing machine for exhaust screws as described in claim 6, characterized in that, An anti-detachment clasp (21) is fixedly installed at the opening of the groove (17).

8. The airtightness testing machine for exhaust screws as described in claim 6, characterized in that, A spring (22) is fixedly installed inside the slide groove (17). One end of the spring (22) abuts against the pressure rod (9), and the other end of the spring (22) abuts against the bottom of the slide groove (17).

9. The airtightness testing machine for exhaust screws as described in claim 1, characterized in that, The detection mechanism (4) also includes a second telescopic rod (23) and a pressure column (24). The second telescopic rod (23) is fixedly connected to the frame (10). The telescopic end of the second telescopic rod (23) is fixedly connected to the movable pressure plate (11). The pressure column (24) is fixedly installed at the bottom of the movable pressure plate (11). The bottom of the pressure column (24) is provided with an avoidance hole.

10. The airtightness testing machine for exhaust screws as described in claim 9, characterized in that, The second telescopic rod (23) is an electric push rod.

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