Air tightness detection device for structural member
By designing a simple structure and low-cost airtightness detection device, and using tooling tables, pressurized parts and pressurized components for edge sealing and pressurization detection, the problems of poor airtightness of structural parts and high cost of detection devices are solved. Fast and economical airtightness detection is achieved.
Patent Information
- Application Number
- CN202421132503.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-22
AI Technical Summary
During the production process of structural parts, small cavity is prone to occur during the initial molding process, resulting in poor airtightness. The existing large-scale airtightness detection devices are expensive and difficult to meet the needs of small and micro enterprises.
An airtightness detection device for structural parts is designed. By setting a housing groove and a sealing groove on the tooling table, edge sealing and pressurizing detection are performed using pressurized parts and pressurized components to achieve airtightness detection.
The device is simple in structure and low in cost. It is suitable for small and micro enterprises. It can quickly perform airtightness detection. It is suitable for structural parts of various sizes, reducing the cost of use and improving the efficiency of use.
Smart Images
Figure CN222528854U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of air tightness detection, and in particular relates to an air tightness detection device for a structural part. Background Art
[0002] In the production process of structural parts, it is first necessary to form the blank, and then machine the formed blank to form the required structural shape. However, in the production process of the blank, whether it is a cast part or a pressed part, tiny cavities will inevitably be generated inside it. If these tiny cavities are covered inside the structural part after machining, then their air tightness can be guaranteed. However, if the cavities on the side walls are exposed after machining and form cavities that are connected to each other, poor air tightness will be caused, and this situation cannot be solved in advance. Only after the structural parts are completed, air tightness testing can be carried out to detect whether the air tightness of these completed structural parts is sufficient to meet subsequent use needs. However, large-scale air tightness testing devices are expensive and are customized equipment, which is a heavy expense for small and micro enterprises with small production volumes. Utility Model Content
[0003] In order to solve the above technical problems, the utility model provides an airtightness detection device for structural parts, which places the part to be detected in a receiving groove of a workbench, seals the edge of the part to be detected by a sealing ring, covers the part to be detected with a pressurizing part, and applies downward pressure to the pressurizing part through a pressure head of a pressing assembly to prevent gas leakage from the sealing ring. After high-pressure gas is pumped into the pressurizing part, the part to be detected can be airtightly detected. The device has a simple structure and is low in cost, and only needs to be tested manually.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0005] A device for detecting air tightness of a structural part, comprising a tooling table, a detection assembly, a pressing assembly and a part to be detected, wherein the tooling table is provided with a boss protruding upward, and the boss is provided with a receiving groove and a sealing groove opening upward, wherein the receiving groove is cylindrical, and the sealing groove is arranged in a circular ring shape around the receiving groove as the center and on the periphery of the receiving groove, and a sealing ring is provided in the sealing groove;
[0006] The detection assembly includes a pressurized member and a quick connector, wherein a pressurized chamber opening downward is provided in the pressurized member, a matching groove is provided at the edge of the opening at the lower end of the pressurized chamber, and the matching groove matches with the boss, the bottom of the pressurized member abuts against the workbench and covers the accommodating groove and the sealing groove in the pressurized chamber, an airtight groove is also provided on the boss, a sealing ring is provided in the airtight groove, and the airtight groove points to the matching groove, the quick connector is connected to the outer wall of the pressurized member and connected to the pressurized chamber, an abutting joint is provided in the pressurized chamber, a buffer chamber is provided in the abutting joint, and an air inlet connecting the pressurized chamber and the buffer chamber is provided on the abutting joint;
[0007] The pressing assembly comprises a pressing seat, a pressing rod and a pressing head. The pressing seat can be detachably connected to the workbench. One end of the pressing rod can be rotatably connected to the pressing seat. The other end of the pressing rod is an annular structure. The upper and lower ends of the pressing rod are respectively abutted with two groups of clamping plates. The through rod on the pressing head passes through one group of clamping plates, the annular inner ring of the pressing rod and the other group of clamping plates in sequence. The end of the through rod can be screwed with a nut. The bottom of the nut abuts on the clamping plate. The lower end face of the pressing head can be abutted and connected to the upper end of the pressure member.
[0008] The to-be-detected member is inserted into the accommodating groove, the lower end of the to-be-detected member abuts against the sealing ring, and the upper end of the to-be-detected member abuts against the abutting head.
[0009] The airtightness testing device for structural parts adopting this structure is provided with a cylindrical receiving groove on the boss of the tooling table to accommodate the part to be tested. In order to seal the periphery of the part to be tested, an annular sealing groove is provided on the periphery of the receiving groove with the receiving groove as the center. A sealing ring is placed in the sealing groove to seal the periphery of the part to be tested. In order to perform airtightness testing, it is necessary to inject high-pressure gas into the part to be tested. A closed space is required to inject gas into the part to be tested. Therefore, a pressurizing member is provided to cover the boss, and the bottom of the pressurizing member is abutted against the tooling table. The receiving groove and the sealing groove are covered in the pressurizing chamber of the pressurizing member. The matching groove is pressed into the airtight space through the matching groove at the edge of the opening of the pressurizing chamber and the boss. The sealing ring in the groove makes the pressurized chamber relatively closed. For the cylindrical structural parts with the opening upward, the most important purpose is to be able to pressurize and inflate the cylinder for air tightness detection, and the upper end of the part to be detected must also be pressed down to force the part to be detected to be pressed on the sealing ring for air sealing. Therefore, an abutment joint is provided, and a buffer chamber is provided in the abutment joint. The buffer chamber and the pressurized chamber are connected through the air inlet, so that the gas entering from the quick joint can not only fill the pressing surface between the part to be detected and the sealing groove, but also enter the buffer chamber through the pressurized chamber and fill the cylinder of the part to be detected, thereby realizing all-round air tightness detection. Moreover, the pressurized parts can be equipped according to the size of the products, so that the detection device can be suitable for structural parts of various sizes.
[0010] Since the pressurized parts require a continuous downward pressure and gas must be pumped into the pressurized chamber to achieve air tightness testing, the testing of small parts requires rapid testing to improve efficiency. If the downward pressure is performed by pushing the cylinder, the lifting and pressing of the cylinder will take a long time, and the upper and lower parts to be tested still need to be operated manually, so it does not meet the needs of high efficiency. In order to reduce the production cost of the device and the purchase cost of small and micro enterprises, rapid replacement by manual means is the fastest and lowest cost form. Therefore, a pressing assembly is used, and the pressure seat is used as a base for stabilization, and the pressure rod is rotatably connected to the pressure seat. The pressure rod is equipped with a pressure head, and the pressure head can be moved during the rotation of the pressure rod. The abutment is pressed against the upper end of the pressure piece to apply pressure to the pressure piece. However, since there are many different styles of pressure pieces, their heights and sizes will also vary. Therefore, if the pressure head is fixed in a specific position, the pressure head will not be able to completely press on the upper end of the pressure piece. Therefore, the position of the pressure head needs to be adjusted. The pressure rod is set to an annular structure, and clamps are attached to the upper and lower ends of the pressure rod. The through rod on the pressure head passes through a group of clamps, the annular inner ring of the pressure rod and another group of clamps in turn, and a nut is screwed into the end of the through rod. The two groups of clamps are pressed and fixed on the pressure rod by the pressing force of the nut when tightened. After loosening the nut, the through rod can drive the two groups of clamps to move back and forth, changing the position of the pressure head, thereby adapting the position of the pressure head to be pressed on the pressure piece.
[0011] Furthermore, the detection component also includes a limit frame, which is detachably connected to the workbench and is sleeved on the outer side wall of the pressure piece.
[0012] Furthermore, the pressing assembly also includes a pressing handle and a connecting rod, one end of the pressing handle can be rotatably connected to the pressing seat, one end of the connecting rod can be rotatably connected to the middle of the pressing handle, and the other end of the connecting rod can be rotatably connected to the middle of the pressing rod.
[0013] Compared with the prior art, the advantages of the utility model are: by setting up a accommodating groove for the installation of the part to be detected, and then using a pressurizing part to apply downward pressure to the part to be detected, high-pressure gas is pumped into the pressurizing chamber inside the pressurizing part to perform air tightness testing on the part to be detected. At the same time, in order to apply downward pressure to the pressurizing part, downward pressure is performed by the pressure head on the pressing assembly, and the position of the pressure head on the pressure rod can be adjusted to adapt the position of the pressure head to be pressed on the pressurizing part. The device has a simple structure and low production cost. It is suitable for purchase by small and micro enterprises with low use needs and has low purchase cost. Moreover, the pressurizing part can be equipped according to the size of the product, so that the detection device can be applicable to various structural parts of different sizes, and has high applicability. It can also be used through manual operation, which can also reduce the use cost and improve the use efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0015] Figure 1 It is a three-dimensional diagram of the utility model;
[0016] Figure 2 This is a side view of the utility model in use;
[0017] Figure 3 This is a three-dimensional diagram of the utility model in the open state;
[0018] Figure 4 It is a top-down exploded schematic diagram of the utility model;
[0019] Figure 5 It is a bottom-view explosion schematic diagram of the utility model.
[0020] Among them: 1. Workbench; 11. Receiving groove; 12. Sealing groove; 13. Sealing ring; 14. Boss; 15. Airtight groove; 2. Detection assembly; 21. Pressurized member; 211. Pressurized chamber; 212. Butt joint; 213. Buffer chamber; 214. Air inlet; 215. Matching groove; 22. Quick connector; 23. Limiting frame; 3. Part to be detected; 4. Pressing assembly; 41. Pressing seat; 42. Pressing rod; 43. Pressing head; 44. Clamp; 45. Through rod; 46. Nut; 47. Pressing handle; 48. Connecting rod. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.
[0022] The specific implementation of the utility model will be described below in conjunction with the accompanying drawings:
[0023] like Figure 1-5As shown, a device for testing air tightness of a structural part comprises a tooling table 1, a testing component 2, a pressing component 4 and a to-be-tested part 3, wherein the tooling table 1 is provided with a boss 14 protruding upward, and the boss 14 is provided with a receiving groove 11 and a sealing groove 12 opening upward, wherein the receiving groove 11 is cylindrical, and the sealing groove 12 is arranged in a circular ring shape around the receiving groove 11 and at the periphery of the receiving groove 11, and a sealing ring 13 is arranged in the sealing groove 12;
[0024] The detection assembly 2 includes a pressurizing member 21 and a quick connector 22. A pressurizing chamber 211 opening downward is provided in the pressurizing member 21. A matching groove 215 is provided at the edge of the lower opening of the pressurizing chamber 211. The matching groove 215 matches with the boss 14. The bottom of the pressurizing member 21 abuts against the tooling table 1 and covers the accommodating groove 11 and the sealing groove 12 in the pressurizing chamber 211. The boss 14 is also provided with an airtight groove 15. A sealing ring 13 is provided in the airtight groove 15. The airtight groove 15 points to the matching groove 215. The quick connector 22 is connected to the outer wall of the pressurizing member 21 and connected to the pressurizing chamber 211. A butt joint 212 is provided in the pressurizing chamber 211. A buffer chamber 213 is provided in the butt joint 212. An air inlet 214 connecting the pressurizing chamber 211 and the buffer chamber 213 is provided on the butt joint 212.
[0025] The pressing assembly 4 includes a pressing seat 41, a pressing rod 42 and a pressing head 43. The pressing seat 41 is detachably connected to the workbench 1. One end of the pressing rod 42 is rotatably connected to the pressing seat 41. The other end of the pressing rod 42 is an annular structure. The upper and lower ends of the pressing rod 42 are respectively abutted with two groups of clamping plates 44. The through rod 45 on the pressing head 43 passes through one group of clamping plates 44, the annular inner ring of the pressing rod 42 and the other group of clamping plates 44 in sequence. The end of the through rod 45 can be screwed with a nut 46. The bottom of the nut 46 abuts on the clamping plate 44. The lower end surface of the pressing head 43 can be abutted and connected to the upper end of the pressure member 21.
[0026] The detected member 3 is inserted into the accommodating groove 11 , the lower end of the detected member 3 abuts against the sealing ring 13 , and the upper end of the detected member 3 abuts against the abutting head 212 .
[0027] Furthermore, the detection assembly 2 further includes a limit frame 23 , which is detachably connected to the workbench 1 , and is sleeved on the outer side wall of the pressure member 21 .
[0028] Furthermore, the pressing assembly 4 also includes a pressing handle 47 and a connecting rod 48, one end of the pressing handle 47 can be rotatably connected to the pressing seat 41, one end of the connecting rod 48 can be rotatably connected to the middle of the pressing handle 47, and the other end of the connecting rod 48 can be rotatably connected to the middle of the pressing rod 42.
[0029] Description of the working method of this utility model:
[0030] The air tightness testing device for the structural parts adopting the structure is provided with a cylindrical receiving groove 11 on the boss 14 of the tooling table 1 for accommodating the to-be-tested part 3. In order to seal the periphery of the to-be-tested part 3, an annular sealing groove 12 is provided on the periphery of the receiving groove 11 with the receiving groove 11 as the center. A sealing ring 13 is placed in the sealing groove 12 to seal the periphery of the to-be-tested part 3. In order to perform the air tightness test, it is necessary to inject high-pressure gas into the to-be-tested part 3, and a closed space is required to seal the periphery of the to-be-tested part 3. The test piece 3 is injected with gas, so a pressurizing piece 21 is set to cover the boss 14, the bottom of the pressurizing piece 21 is abutted on the tooling table 1, the accommodating groove 11 and the sealing groove 12 are covered in the pressurizing chamber 211 of the pressurizing piece 21, and the matching groove 215 at the edge of the opening of the pressurizing chamber 211 is pressed against the sealing ring 13 in the airtight groove 15 through the matching of the boss 14, so that the pressurizing chamber 211 is relatively closed. For the cylindrical structural parts with the opening upward, the main purpose is to be able to pressurize and pump air in the cylinder for airtightness detection, and The upper end of the detected part 3 must also be pressed down to force the detected part 3 to be pressed against the sealing ring 13 for airtightness, so an abutment joint 212 is provided, and a buffer chamber 213 is provided in the abutment joint 212, and the buffer chamber 213 and the pressurizing chamber 211 are connected through the air inlet 214, so that the gas entering from the quick joint 22 can not only fill the pressing surface of the detected part 3 and the sealing groove 12, but also enter the buffer chamber 213 through the pressurizing chamber 211, and fill the cylinder of the detected part 3, thereby realizing a full range of airtightness detection. Moreover, the pressure piece 21 can be equipped according to the size of the product, so that the detection device can be suitable for various structural parts of different sizes. Since different structural parts are adapted with different pressure pieces 21, in order to ensure that the pressure piece 21 can always be installed and used at a fixed angle and a fixed position when detecting a single group of parts 3 to be detected, a limit frame 23 is added. The limit frame 23 is fitted on the outer wall of the pressure piece 21, and the limit frame 23 is detachably connected to the workbench 1, and the pressure piece 21 is limited by the limit frame 23.
[0031] Since the pressurizing member 21 needs a continuous downward pressure and gas is pumped into the pressurizing chamber 211 to achieve air tightness detection, the detection of small parts requires rapid detection to improve efficiency. If the downward pressure is performed by a cylinder push, the lifting and pressing of the cylinder will take a long time, and the upper and lower parts to be tested 3 still need to be operated manually, which does not meet the requirements of high efficiency. In order to reduce the production cost of the device and the purchase cost of small and micro enterprises, rapid replacement by manual means is the fastest and lowest cost form, so by pressing the components 4, with the pressure seat 41 as the base for stabilization, the pressure rod 42 is rotatably connected to the pressure seat 41, and the pressure head 43 is installed on the pressure rod 42. During the rotation of the pressure rod 42, the pressure head 43 can be pressed against the upper end of the pressure member 21 to apply pressure to the pressure member 21. However, since the pressure member 21 has many different styles and its height and size are also different, if the pressure head 43 is fixed at a specific position, it will cause the pressure head 43 to be unable to be completely pressed on the upper end of the pressure member 21. Therefore, the position of the pressure head 43 needs to be adjusted, and the pressure rod 42 is set to a ring structure, and the pressure rod 4 The upper and lower ends of the pressure head 42 are fitted with the clamping plates 44, and the through rod 45 on the pressure head 43 passes through one set of clamping plates 44, the annular inner ring of the pressure rod 42 and the other set of clamping plates 44 in sequence, and the nut 46 is screwed into the end of the through rod 45. The two sets of clamping plates 44 are pressed and fixed on the pressure rod 42 by the pressing force of the nut 46 when locked. After loosening the nut 46, the through rod 45 can drive the two sets of clamping plates 44 to move forward and backward, change the position of the pressure head 43, and thus adapt the position of the pressure head 43 to the pressure member 21. If the pressure rod 42 is simply used to apply pressure to the pressure head 43, it will still be laborious. It would be more labor-saving to press and deliver by means of a pressing handle 47, so a pressing handle 47 and a connecting rod 48 are provided, one end of the pressing handle 47 is rotatably connected to the pressing seat 41, one end of the connecting rod 48 is rotatably connected to the middle of the pressing handle 47, and the other end of the connecting rod 48 is rotatably connected to the middle of the pressing rod 42, that is, when the pressing handle 47 is rotated, the connecting rod 48 will be driven to rotate, and then the connecting rod 48 will drive the pressing rod 42 to rotate, so that the pressing head 43 is brought into contact with / away from the pressure member 21. The setting of the pressing handle 47 allows for more labor-saving operation, saving the workers' physical labor.
[0032] The beneficial effect of the utility model is that: by setting up the accommodating groove 11 for the installation of the part to be detected 3, and then using the pressure member 21 to apply downward pressure to the part to be detected 3, high-pressure gas is pumped into the pressure chamber 211 inside the pressure member 21 to perform air tightness detection on the part to be detected 3. At the same time, in order to apply downward pressure to the pressure member 21, downward pressure is performed by the pressure head 43 on the pressing component 4, and the position of the pressure head 43 on the pressing rod 42 can be adjusted to adapt the position of the pressure head 43 pressed on the pressure member 21. The device has a simple structure and low production cost. It is suitable for small and micro enterprises with low use requirements and low purchase cost. Moreover, the pressure member 21 can be equipped according to the size of the product, so that the detection device can be applicable to various structural parts of different sizes, and the applicability is also high. It can also be used through manual operation, which can also reduce the use cost and improve the use efficiency.
[0033] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.
Claims
1. A device for detecting air tightness of a structural part, characterized in that: The invention comprises a workbench, a detection assembly and a part to be detected, wherein the workbench is provided with a receiving groove and a sealing groove which are opened upward, the receiving groove is cylindrical, the sealing groove is arranged in a circular ring shape around the receiving groove and is centered on the receiving groove, and a sealing ring is arranged in the sealing groove; the detection assembly comprises a pressurizing member and a quick connector, a pressurizing chamber which is opened downward is arranged in the pressurizing member, the bottom of the pressurizing member abuts against the workbench and covers the receiving groove and the sealing groove in the pressurizing chamber, the quick connector is connected to the outer side wall of the pressurizing member and is connected to the pressurizing chamber, an abutting joint is provided in the pressurizing chamber, a buffer chamber is provided in the abutting joint, and an air inlet which connects the pressurizing chamber and the buffer chamber is provided on the abutting joint; the part to be detected is inserted in the receiving groove, the lower end of the part to be detected abuts against the sealing ring, and the upper end of the part to be detected abuts against the abutting joint.
2. The air tightness detection device for a structural member according to claim 1, characterized in that: The tooling table is provided with an upwardly protruding boss, the containing groove and the sealing groove are both arranged on the boss, and the edge of the lower opening of the pressurizing chamber of the pressurizing member is provided with a matching groove, and the matching groove matches with the boss.
3. The air tightness detection device for a structural member according to claim 2, characterized in that: The detection component also includes a limit frame, which is detachably connected to the workbench and sleeved on the outer side wall of the pressure piece.
4. The air tightness detection device for a structural member according to claim 2, characterized in that: The boss is also provided with an airtight groove, a sealing ring is provided in the airtight groove, and the airtight groove points to the matching groove.
5. The air tightness detection device for a structural member according to claim 1, characterized in that: It also includes a pressing assembly, which includes a pressing seat, a pressing rod and a pressing head. The pressing seat is detachably connected to the workbench, one end of the pressing rod is rotatably connected to the pressing seat, the pressing head is detachably connected to the pressing rod, and the lower end surface of the pressing head can be abutted and connected to the upper end of the pressure member.
6. The air tightness detection device for a structural member according to claim 5, characterized in that: The pressure rod is an annular structure, and the upper and lower ends of the pressure rod are respectively abutted against two groups of clamping plates. The through rod on the pressure head passes through one group of clamping plates, the annular inner ring of the pressure rod and the other group of clamping plates in sequence. The end of the through rod can be screwed with a nut, and the bottom of the nut abuts against the clamping plate.
7. The air tightness detection device for a structural member according to claim 5, characterized in that: The pressing assembly also includes a pressing handle and a connecting rod, one end of the pressing handle is rotatably connected to the pressing seat, one end of the connecting rod is rotatably connected to the middle of the pressing handle, and the other end of the connecting rod is rotatably connected to the middle of the pressing rod.