Part leakproofness testing device
By designing an automated part airtightness testing device, and utilizing components such as an airtightness tester, a fixing rod, and a positioning pin, the problems of low efficiency and poor accuracy in part airtightness testing in existing technologies have been solved, achieving efficient and accurate airtightness testing.
Patent Information
- Application Number
- CN202520233915.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-02-14
AI Technical Summary
Existing methods for testing the airtightness of parts are inefficient and inaccurate, especially for detecting minute leaks, and the testing process is time-consuming and costly.
A component airtightness testing device was designed, including a base, a sealing ring, a fixing plate, and a telescopic mechanism. Through an airtightness tester and components such as fixing rods and positioning pins, automated airtightness testing is achieved, eliminating the need for manual observation and ensuring that the component fits tightly with the base and is in a stable position.
It significantly improves the efficiency and accuracy of component airtightness testing, reduces testing procedures and costs, and ensures the stability and accuracy of test results.
Smart Images
Figure CN223691976U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of part tightness detection, and specifically relates to a part tightness testing device. BACKGROUND
[0002] The tightness of a part plays a vital role in its quality and reliability. If the part is not tight enough, it may lead to a decline in product quality, performance damage, or even quality accidents during installation or use. Therefore, tightness detection is a key link to ensure product quality. Currently, the water detection method is one of the widely used tightness detection methods. The operation steps are as follows:
[0003] First, place the part in the clamp, fully immerse the clamp in water, and ensure that the surface of the part is completely covered with water. Then, inject a certain pressure of gas into the inside of the clamp. Finally, observe whether bubbles are generated on the surface of the part and the connection. If bubbles come out, it indicates that the part has a leakage point and quality problems.
[0004] The water detection method detects the generation of bubbles by the detection personnel to determine the leakage point. When the leakage point is large, the generated bubbles are large and easy to observe. However, for a small leakage point, the generated bubbles are small and difficult to be observed by the detection personnel, resulting in inaccurate detection results. Secondly, the detection personnel needs to spend a lot of time on each part for observation, which makes the entire detection process time-consuming, low in detection efficiency, and in addition, the detection personnel is prone to fatigue, which affects the accuracy of the detection results. In addition, the water detection method needs to immerse the part in water, and after the detection is completed, the surface of the part will have residual water, which needs to be dried, increasing the detection steps and cost. UTILITY MODEL CONTENTS
[0005] The utility model intends to provide a part tightness testing device, which can effectively improve the part tightness detection efficiency and ensure the accuracy of the detection results.
[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:
[0007] 1) A part tightness testing device, comprising a base, a recess for forming a sealed chamber with the part is formed on the upper surface of the base, a sealing ring is arranged on the edge of the recess, an inflation port is formed in the side wall of the base and communicates with the recess, and an air tightness detector is connected to the inflation port, the model of the air tightness detector is YX-150, a fixing plate for fixing the part is arranged above the base, the position of the fixing plate corresponds to the position of the base, and an extension mechanism for driving the fixing plate to move up and down along the height direction is arranged on the base.
[0008] The utility model discloses, the upper surface of base is provided with the recess, and the edge of recess is equipped with sealing ring, when the part covers on the recess, the surface of part and sealing ring contact, make the surface of part and recess form a closed chamber, the chamber can be used to contain gas and carry out leakproofness test, the setting of sealing ring can enhance the leakproofness between part and recess, prevent gas from part and the edge of recess contact leak, thereby improve the accuracy of part leakproofness test result, the side wall of base is provided with the inflation port that communicates with recess, and the inflation port is connected with gas tightness detector, is used to fill into the closed chamber of part and the gas of recess formation, to test the leakproofness of part.
[0009] The upper surface of base is provided with fixed plate, is used for the part that covers on the recess to press down and fix, makes the surface of part and the surface of base can be closely combined with the surface of base, prevents the part from displacement or loose condition in leakproofness test process, thereby guarantees the stability of part leakproofness test process, simultaneously, press down and fix the part, can make part and sealing ring closely combine, thereby increase the accuracy of leakproofness test result, in addition, the upper surface of base is equipped with telescopic mechanism, and telescopic mechanism can provide power for fixed plate, make it can move up and down along the height direction, and then carry out the down-pressing fixed operation of part, the process of above-mentioned part leakproofness detection no longer depends on the subjective observation of detection personnel to draw result, thereby improves the efficiency and accuracy of detection, in addition, also reduces the detection flow, effectively saves the detection cost.
[0010] 2) The part leakproofness testing device according to 1), wherein:
[0011] The surface of the fixed plate facing the base is provided with a first fixing rod for fastening the part to the base, and the position of the first fixing rod corresponds to the position of the center point of the recess.
[0012] In the utility model, the surface of the fixed plate facing the base is provided with the first fixing rod, and the position of the first fixing rod corresponds to the center point of the recess, so that the pressure can be directly applied to the central position of the part, and at the same time, the pressure applied to the part can be uniformly distributed to avoid damage or poor sealing of the part due to uneven local stress. A plurality of second fixing rods are arranged around the first fixing rod, and the positions of the second fixing rods correspond to the outer edges of the recess. The second fixing rods apply pressure to the edges of the part to ensure that the edges of the part are tightly pressed against the base to prevent compressed air from leaking from the edges of the part. The first fixing rod and the second fixing rods are used in cooperation to achieve overall compression of the part and ensure the stability of the position of the part during the test of the leakproofness of the part, thereby improving the accuracy of the leakproofness test.
[0013] 3) The part tightness testing device according to 1), wherein:
[0014] The telescopic mechanism comprises a first cylinder, a second cylinder, a third cylinder and a fourth cylinder, a plurality of limiting sleeves are uniformly distributed on the base along the circumferential direction thereof, the positions of each limiting sleeve correspond to the positions of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder one by one, the free ends of the telescopic rods of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder pass through the fixed plate and are embedded in the limiting sleeves, and the end portions of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder close to the fixed plate are fixedly connected with the fixed plate through bolts.
[0015] In the utility model, the telescopic mechanism comprises a first cylinder, a second cylinder, a third cylinder and a fourth cylinder, is used for providing pulling force and pushing force for the fixed plate, enables the fixed plate to move up and down along the height direction, thereby ensuring that the part can be tightly pressed on the base. The base is uniformly provided with a plurality of limiting sleeves, the free ends of the telescopic rods of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder pass through the fixed plate and are embedded in the limiting sleeves, and the fixed plate is driven downward by the first cylinder, the second cylinder, the third cylinder and the fourth cylinder. In this process, the limiting sleeve can limit the pressing height of the fixed plate, avoid the situation that the fixed plate is pressed excessively due to improper operation, thereby preventing the first fixed rod and the second fixed rod from impacting the groove and the base, and further causing equipment damage.
[0016] 4) The part tightness testing device according to 1), wherein:
[0017] The surface of the base towards the fixed plate is provided with a plurality of positioning pins for fixing the part on the base, and the positioning pins are arranged outside the groove.
[0018] In the utility model, the base is provided with a plurality of positioning pins, and the positioning pins are arranged outside the groove. The positioning pins are used for fixing the position of the part placed on the base, ensuring that the part can accurately cover the groove, and avoiding that the part is not accurately positioned to cause the sealing cavity to be not completely sealed. Meanwhile, the positioning pins can prevent the part from being displaced during the tightness testing of the part, can improve the stability of the testing process, and thereby improve the accuracy of the testing result.
[0019] 5) The part tightness testing device according to 3), wherein:
[0020] The fixed plate is provided with an electromagnetic valve for controlling opening and closing of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder, the electromagnetic valve is connected with a first main hose and a second main hose, the first main hose is communicated with a plurality of first time hoses corresponding to the first cylinder, the second cylinder, the third cylinder and the fourth cylinder along the axial direction of the first main hose, and each first time hose is communicated with the top of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder respectively, so that the first time hoses corresponding to the first cylinder, the second cylinder, the third cylinder and the fourth cylinder form first air paths respectively, the second main hose is communicated with a plurality of second time hoses corresponding to the first cylinder, the second cylinder, the third cylinder and the fourth cylinder along the axial direction of the second main hose, and each second time hose is communicated with the bottom of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder respectively, so that the second time hoses corresponding to the first cylinder, the second cylinder, the third cylinder and the fourth cylinder form second air paths respectively.
[0021] In the utility model, the fixed plate is provided with an electromagnetic valve, the electromagnetic valve controls the movement of the valve core through the magnetic field generated by the conductive coil, so as to control the switching of the first air path and the second air path, thereby realizing the control of the movement of the telescopic rod in the first cylinder, the second cylinder, the third cylinder and the fourth cylinder. The internal space of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder is divided into two air chambers by the respective telescopic rods, the electromagnetic valve is connected with the first main hose and the second main hose, the first main hose is communicated with a plurality of first time hoses along the axial direction of the first main hose, each first time hose is communicated with the air chamber at the top of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder respectively, so that the first time hoses corresponding to the first cylinder, the second cylinder, the third cylinder and the fourth cylinder form first air paths respectively, each second time hose is communicated with the air chamber at the bottom of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder respectively, so that the second time hoses corresponding to the first cylinder, the second cylinder, the third cylinder and the fourth cylinder form second air paths respectively.
[0022] When the telescopic rod in the first cylinder, the second cylinder, the third cylinder and the fourth cylinder needs to move outward, the compressed air is communicated with the first air path through the movement of the valve core in the electromagnetic valve. The compressed air enters the first time hose through the first main hose, and then is delivered to the air chamber at the top of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder through the first time hose respectively. With the continuous filling of the compressed air, the pressure in the air chamber at the top of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder gradually increases, and the telescopic rod in the first cylinder, the second cylinder, the third cylinder and the fourth cylinder moves outward under the action of the compressed air pressure.
[0023] Meanwhile, the compressed air in the bottom air cavity of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder is extruded into the second secondary hose, then is discharged into the second main hose through the second secondary hose, and finally is discharged through the electromagnetic valve. The first main hose uniformly distributes the compressed air into the air cavity at the top of each cylinder through the first secondary hose, so that the pressure in the top air cavity of the four cylinders is synchronously increased, thereby causing the telescopic rods in the four cylinders to synchronously move outward. The movement of the telescopic rods in the first cylinder, the second cylinder, the third cylinder and the fourth cylinder drives the fixed plate to move downward, so that the fixed plate gradually applies pressure to the part, and finally causes the part to be firmly pressed on the base, so that the part and the groove form a closed cavity. Then, the closed cavity is filled with gas through the inflation port, so that the closedness of the part is tested.
[0024] After the closedness test of the part is completed, the valve core in the electromagnetic valve is moved to connect the compressed air with the second air path, and the compressed air enters the second main hose. Then, the compressed air enters the air cavity at the bottom of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder through the second secondary hose. With the continuous filling of the compressed air, the pressure in the bottom air cavity of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder is gradually increased, and the telescopic rods in the first cylinder, the second cylinder, the third cylinder and the fourth cylinder move into the cylinders under the action of the compressed air pressure. Meanwhile, the compressed air in the top air cavity of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder is extruded into the first secondary hose, then is discharged into the first main hose through the first secondary hose, and finally is discharged through the electromagnetic valve. The movement of the telescopic rods in the first cylinder, the second cylinder, the third cylinder and the fourth cylinder drives the fixed plate to move upward, so that the fixed plate is separated from the part, and the part is convenient to take out.
[0025] Compared with the prior art, the utility model still has following technical effect:
[0026] In the utility model, the recess is arranged on the upper surface of the base, and the surface of the part and the recess can form a closed cavity. By using the air tightness detector, the closed cavity is filled with gas to test the closedness of the part. Compared with the prior art, the utility model can avoid judging the test result by manual observation, and significantly improves the efficiency and accuracy of the test result. Secondly, during the detection process, the first fixed rod and the second fixed rod are pressed downward to comprehensively press the part. Meanwhile, the fixed pin is arranged on the base to ensure that the part is accurately covered on the recess, and displacement does not occur during the detection process, so that the stability of the part during the test process is ensured, and the accuracy of the test result is improved. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 It is a structural schematic view of the utility model a part closedness test device.
[0028] Figure 2The utility model discloses a structure diagram of fixed plate in a part tightness testing device.
[0029] Figure 3 The utility model discloses a structure diagram of base in a part tightness testing device. DETAILED DESCRIPTION
[0030] The following is further explained in detail through specific embodiments:
[0031] The reference signs in the drawings of the specification include: base 1, recess 2, sealing ring 3, inflation port 4, fixed plate 5, first fixed rod 6, second fixed rod 7, first air cylinder 8, second air cylinder 9, third air cylinder 10, fourth air cylinder 11, limiting sleeve 12, positioning pin 13, electromagnetic valve 14, first main hose 15, second main hose 16, first secondary hose 17, second secondary hose 18.
[0032] Embodiment, see Figure 1 , Figure 2 and Figure 3 The utility model discloses a part tightness testing device, including base 1, the recess 2 of being used for forming the recess 2 of the cooperation of part with the closed chamber is seted up on the surface of base 1, and the edge of recess 2 is equipped with sealing ring, and the inflation port 4 that communicates with recess is seted up on the side wall of base 1, and the inflation port 4 is connected with gas tightness detector, and the model of gas tightness detector is: YX-150, and the fixed plate 5 for down-pressing fixed part is equipped with on the top of base 1, and the position of fixed plate 5 corresponds with the position of base 1, and the telescopic mechanism for driving fixed plate 5 to move up and down along the height direction is equipped with on base 1.
[0033] In the embodiment, the recess 2 is seted up on the surface of base 1, and the edge of recess 2 is equipped with sealing ring. When the part covers on the recess 2, the surface of part contacts with sealing ring 3, so that the surface of part and recess 2 form a closed chamber. The chamber can be used to contain gas and carry out tightness test. The setting of sealing ring 3 can enhance the tightness between part and recess 2, prevent gas from leaking from the edge where part and recess 2 contact, so as to improve the accuracy of part tightness test result. The inflation port 4 that communicates with recess 2 is seted up on the side wall of base 1, and the inflation port 4 is connected with gas tightness detector, which is used to fill gas into the closed chamber formed by part and recess 2, so as to test the tightness of part.
[0034] The fixed plate 5 is arranged above the base 1, and is used to press and fix the part covered on the groove 2 downward, so that the surface of the part in contact with the base 1 can be closely attached to the surface of the base 1, preventing the part from being displaced or loosened during the airtightness test, thereby ensuring the stability of the part airtightness test process. At the same time, the part is pressed and fixed downward, which can make the part closely attached to the sealing ring 3, thereby increasing the accuracy of the airtightness test result. In addition, the base 1 is provided with a telescopic mechanism, which can provide power for the fixed plate 5 to move up and down along the height direction, thereby performing the downward pressing and fixing operation on the part. The above-mentioned part airtightness detection process no longer relies on the subjective observation of the detection personnel to obtain the result, thereby improving the efficiency and accuracy of the detection. In addition, the detection process is also reduced, effectively saving the detection cost.
[0035] The surface of the fixed plate 5 facing the base 1 is provided with a first fixing rod 6 for fastening the part on the base 1, and the position of the first fixing rod 6 corresponds to the position of the center point of the groove 2. The surface of the fixed plate 5 facing the base 1 is provided with a plurality of second fixing rods 7 arranged around the side of the first fixing rod 6, and the position of the second fixing rod 7 corresponds to the outer edge of the groove 2.
[0036] In this embodiment, the surface of the fixed plate 5 facing the base 1 is provided with a first fixing rod 6, and the position of the first fixing rod 6 corresponds to the center point of the groove 2. The first fixing rod 6 can directly apply pressure to the center position of the part, and at the same time, it can ensure that the pressure acting on the part is uniformly distributed, avoiding damage or poor sealing of the part due to uneven local stress. A plurality of second fixing rods 7 are arranged around the side of the first fixing rod 6, and the position of the second fixing rod 7 corresponds to the outer edge of the groove 2. The second fixing rod 7 applies pressure to the edge of the part, ensuring that the edge of the part is pressed tightly on the base 1, preventing compressed air from leaking from the edge of the part. The first fixing rod 6 and the second fixing rod 7 are used in cooperation, which can realize the overall compression of the part, ensure the stability of the part position during the test of the airtightness of the part, and thereby improve the accuracy of the airtightness test.
[0037] The telescopic mechanism includes a first air cylinder 8, a second air cylinder 9, a third air cylinder 10 and a fourth air cylinder 11. The base 1 is uniformly distributed with a plurality of limiting sleeves 12 along the circumferential direction thereof. The position of each limiting sleeve 12 corresponds to the position of the first air cylinder 9, the second air cylinder 10, the third air cylinder 11 and the fourth air cylinder 12 respectively. The free end of the telescopic rod of the first air cylinder 9, the second air cylinder 10, the third air cylinder 11 and the fourth air cylinder 12 penetrates through the fixed plate 5 and is embedded in the limiting sleeve 12. The end of the first air cylinder 9, the second air cylinder 10, the third air cylinder 11 and the fourth air cylinder 12 close to the fixed plate 5 is fixedly connected with the fixed plate 5 by bolts.
[0038] In this embodiment, the telescopic mechanism includes a first cylinder 8, a second cylinder 9, a third cylinder 10 and a fourth cylinder 11, which are used to provide pulling force and pushing force for the fixed plate 5, so that the fixed plate 5 can move up and down along the height direction, thereby ensuring that the parts can be tightly pressed on the base 1. The base 1 is uniformly provided with a plurality of limiting sleeves 12, the free ends of the telescopic rods of the first cylinder 8, the second cylinder 9, the third cylinder 10 and the fourth cylinder 11 pass through the fixed plate 5 and are embedded in the limiting sleeves 12, and the fixed plate 5 moves downward under the driving of the first cylinder 8, the second cylinder 9, the third cylinder 10 and the fourth cylinder 11. During this process, the limiting sleeves 12 can limit the downward pressing height of the fixed plate 5, avoid the situation that the fixed plate 5 is pressed too much due to improper operation, thereby preventing the first fixed rod 6 and the second fixed rod 7 from impacting the groove 2 and the base 1, and further causing damage to the equipment.
[0039] The surface of the base 1 facing the fixed plate 5 is provided with a plurality of positioning pins 13 for fixing the parts on the base 1, and the positioning pins 13 are arranged outside the groove 2. In this embodiment, a plurality of positioning pins 13 are installed on the base 1, and the positioning pins 13 are arranged outside the groove 2. The positioning pins 13 are used to fix the position of the parts placed on the base 1, ensure that the parts can accurately cover the groove 2, and avoid the situation that the airtight cavity is not completely airtight due to inaccurate position of the parts. At the same time, the positioning pins 13 can prevent the parts from shifting during the airtightness test of the parts, thereby improving the stability of the test process and the accuracy of the test results.
[0040] The fixed plate 5 is provided with an electromagnetic valve 14 for controlling the opening and closing of the first cylinder 8, the second cylinder 9, the third cylinder 10 and the fourth cylinder 11, the electromagnetic valve 14 is connected with an air compressor for providing compressed air, the electromagnetic valve 14 is connected with a first main soft pipe 15 and a second main soft pipe 16, the first main soft pipe 15 is communicated with a plurality of first soft pipes 17 corresponding to the first cylinder 8, the second cylinder 9, the third cylinder 10 and the fourth cylinder 11 along the axial direction of the first main soft pipe 15, and each first soft pipe 17 is respectively communicated with the top of the first cylinder 8, the second cylinder 9, the third cylinder 10 and the fourth cylinder 11, so that the first soft pipes 17 corresponding to the first cylinder 8, the second cylinder 9, the third cylinder 10 and the fourth cylinder 11 each form a first gas path, the second main soft pipe 16 is communicated with a plurality of second soft pipes 18 corresponding to the first cylinder 8, the second cylinder 9, the third cylinder 10 and the fourth cylinder 11 along the axial direction of the second main soft pipe 16, and each second soft pipe 18 is respectively communicated with the bottom of the first cylinder 8, the second cylinder 9, the third cylinder 10 and the fourth cylinder 11, so that the second soft pipes 18 corresponding to the first cylinder 8, the second cylinder 9, the third cylinder 10 and the fourth cylinder 11 each form a second gas path.
[0041] In this embodiment, the fixed plate 5 is provided with an electromagnetic valve 14, which controls the movement of the valve core through the magnetic field generated by the conductive coil, to control the switching of the first and second air paths, thereby realizing the control of the movement of the telescopic rods in the first, second, third and fourth cylinders 8, 9, 10 and 11. The internal space of the first, second, third and fourth cylinders 8, 9, 10 and 11 is divided into two air chambers by the respective telescopic rods, the electromagnetic valve 14 is connected with a first main hose 15 and a second main hose 16, the first main hose 15 is communicated with a plurality of first secondary hoses 17 along its axial direction, each first secondary hose 17 is respectively communicated with the air chamber at the top of the first, second, third and fourth cylinders 8, 9, 10 and 11, so that the first secondary hoses 17 corresponding to the first, second, third and fourth cylinders 8, 9, 10 and 11 each form a first air path, each second secondary hose 18 is respectively communicated with the air chamber at the bottom of the first, second, third and fourth cylinders 8, 9, 10 and 11, so that the second secondary hoses 18 corresponding to the first, second, third and fourth cylinders 8, 9, 10 and 11 each form a second air path.
[0042] When the telescopic rods in the first, second, third and fourth cylinders 8, 9, 10 and 11 need to move outward, the compressed air is communicated with the first air path through the movement of the valve core in the electromagnetic valve 14. The compressed air enters the first secondary hose 17 through the first main hose 15, and then is delivered to the air chamber at the top of the first, second, third and fourth cylinders 8, 9, 10 and 11 through the first secondary hose 17. As the compressed air continues to fill, the pressure in the air chamber at the top of the first, second, third and fourth cylinders 8, 9, 10 and 11 gradually increases, and the telescopic rods in the first, second, third and fourth cylinders 8, 9, 10 and 11 move outward under the action of the compressed air pressure.
[0043] At the same time, the compressed air in the air chamber at the bottom of the first, second, third and fourth cylinders 8, 9, 10 and 11 is squeezed into the second secondary hose 18, and then is discharged into the second main hose 16 through the second secondary hose 18, and finally is discharged through the electromagnetic valve. The first main hose 15 uniformly distributes the compressed air to the air chamber at the top of each cylinder through the first secondary hose 17, so that the pressure in the air chamber at the top of the four cylinders increases synchronously, thereby causing the telescopic rods in the four cylinders to move outward synchronously. The movement of the telescopic rods in the first, second, third and fourth cylinders 8, 9, 10 and 11 will drive the fixed plate 5 to move downward, so that the fixed plate 5 gradually exerts pressure on the parts, and finally the parts are tightly pressed on the base 1, forming a sealed chamber with the groove 2. Then, gas is filled into the sealed chamber through the inflation port 4, thereby performing the sealing test of the parts.
[0044] After the sealing test of the part is completed, the compressed air is communicated with the second gas path through the movement of the valve core in the electromagnetic valve 14, and the compressed air enters the second main hose 16. Then, the compressed air enters the air cavity at the bottom of the first cylinder 8, the second cylinder 9, the third cylinder 10 and the fourth cylinder 11 through the second hose 18. As the compressed air is continuously filled, the pressure in the air cavity at the bottom of the first cylinder 8, the second cylinder 9, the third cylinder 10 and the fourth cylinder 11 gradually increases, and the telescopic rods in the first cylinder 8, the second cylinder 9, the third cylinder 10 and the fourth cylinder 11 move into the cylinder under the action of the compressed air pressure. At the same time, the compressed air in the air cavity at the top of the first cylinder 8, the second cylinder 9, the third cylinder 10 and the fourth cylinder 11 is extruded into the first hose 17, and then discharged into the first main hose 15 through the first hose 17, and finally discharged through the electromagnetic valve 14. The movement of the telescopic rods in the first cylinder 8, the second cylinder 9, the third cylinder 10 and the fourth cylinder 11 will drive the fixed plate 5 to move upwards, so that the fixed plate 5 is separated from the part, and the part is taken out.
[0045] In the embodiment, a groove 2 is formed on the upper surface of the base 1, and the surface of the part can form a sealed chamber with the groove 2. By using a gas tightness detector, gas is filled into the sealed chamber to test the sealing of the part. Compared with the prior art, the embodiment can avoid judging the test result by manual observation, and significantly improves the efficiency and accuracy of the test result. Secondly, during the detection process, the part can be fully compressed by the downward pressure of the first fixed rod 6 and the second fixed rod 7. At the same time, the fixed pin 13 is arranged on the base 1, which can ensure that the part is accurately covered on the groove 2 and does not displace during the detection process, thereby ensuring the stability of the part during the test process and improving the accuracy of the test result.
[0046] The above is only an embodiment of the present application, and the specific technical solutions and / or common knowledge of the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.
Claims
1. A part tightness testing device characterized by, The base is provided with a recess on the upper surface for forming a sealed chamber with the parts, the edge of the recess is provided with a sealing ring, the sidewall of the base is provided with an inflation port communicated with the recess, the base is provided with a fixing plate above for fixing the parts downward, the position of the fixing plate corresponds to the position of the base, the base is provided with a telescopic mechanism for driving the fixing plate to move up and down along the height direction.
2. A device for testing the tightness of a part according to claim 1, characterized in that: The surface of the fixing plate towards the base is provided with a first fixing rod for fastening the parts on the base, the position of the first fixing rod corresponds to the position of the center point of the recess, the surface of the fixing plate towards the base is provided with a plurality of second fixing rods around the side of the first fixing rod, the position of the second fixing rod corresponds to the outer edge of the recess.
3. A device for testing the tightness of a part according to claim 1, characterized in that: The telescopic mechanism includes a first cylinder, a second cylinder, a third cylinder and a fourth cylinder, the base is uniformly distributed with a plurality of limiting sleeves along the circumferential direction, the position of each limiting sleeve corresponds to the position of the telescopic rod of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder respectively, the free end of the telescopic rod of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder penetrates through the fixing plate and is embedded into the limiting sleeve, the end of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder close to the fixing plate is fixedly connected with the fixing plate through bolts.
4. A device for testing the tightness of a part according to claim 1, characterized in that: The surface of the base towards the fixing plate is provided with a plurality of positioning pins for fixing the parts on the base, the positioning pins are arranged around the outside of the recess.
5. A device for testing the tightness of a part according to claim 3, characterized in that: The fixing plate is provided with solenoid valves for controlling the opening and closing of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder, the solenoid valves are connected with a first main hose and a second main hose, the first main hose is communicated with a plurality of first time hoses corresponding to the first cylinder, the second cylinder, the third cylinder and the fourth cylinder along the axial direction, and each first time hose is communicated with the top of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder respectively, so that the first time hoses corresponding to the first cylinder, the second cylinder, the third cylinder and the fourth cylinder form first gas paths respectively, the second main hose is communicated with a plurality of second time hoses corresponding to the first cylinder, the second cylinder, the third cylinder and the fourth cylinder along the axial direction, and each second time hose is communicated with the bottom of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder respectively, so that the second time hoses corresponding to the first cylinder, the second cylinder, the third cylinder and the fourth cylinder form second gas paths respectively.