Heating tube air tightness testing device

Abstract

The utility model relates to the technical field of air tightness testing, and discloses a heating tube air tightness testing device, which comprises a rack, an upper plate I is fixedly arranged in the rack, a heating tube is fixedly arranged above a heating tube base, and an air inlet tube is arranged in the heating tube base. The heating tube upper die is fixedly installed at the bottom of the first upper plate, the heating tube base is fixed between the heating tube upper die and the quick-change lower die base, the interior of the heating tube base is sealed, then the air inlet pipe is connected with an external high-precision airtight instrument, compressed air of 8 mpa to 12 mpa is injected, and the air inlet pipe is connected with the air inlet pipe through the external high-precision airtight instrument. After injection is conducted for one minute, pressure stabilization is stopped, whether the internal air pressure has a difference value or not is detected, if no difference value exists, it represents that the sealing performance is good, if the difference value exists, marking is conducted, follow-up processing is conducted, and therefore the effects of being simple in operation and improving the detection efficiency are achieved.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, and more specifically, to a heating tube airtightness testing device. Background Technology

[0002] A heating element airtightness testing device is a device used to test the sealing performance of heating elements to ensure that no gas or liquid leakage occurs during operation, thereby guaranteeing safety and durability. However, in existing heating element airtightness testing, different heating elements need to be tested. During testing, manual installation is required to ensure the airtightness, and disassembly is required after testing. This process is complicated and inefficient. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, this utility model provides a heating tube airtightness testing device, which has the advantages of simple operation and high efficiency.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a heating element airtightness testing device, comprising a frame, an upper plate 1 fixedly installed inside the frame, an upper plate 2 provided at the bottom of the upper plate 1, a quick-change lower mold base provided at the bottom of the upper plate 2, an O-ring 1 provided inside the quick-change lower mold base, a quick-change lower mold provided above the O-ring 1, the quick-change lower mold located inside the quick-change lower mold base, an O-ring 2 provided inside the quick-change lower mold, a heating element upper mold fixedly installed at the bottom of the upper plate 1, a heating element base snapped into the bottom of the heating element upper mold, a heating element fixedly installed above the heating element base, and an air inlet pipe provided inside the heating element base.

[0005] As a preferred technical solution of this utility model, the frame is provided with a connecting plate and a cylinder mounting plate inside. A cylinder anti-rotation block is fixedly installed on the top of the connecting plate, a cylinder is fixedly installed on the bottom of the cylinder mounting plate, and a mounting plate support is fixedly installed on the top of the cylinder mounting plate. A limit nut is engaged on the top of the mounting plate support, and the quick-change lower mold base is snapped into the connecting plate.

[0006] As a preferred embodiment of this utility model, a grating is fixedly installed above the frame. There are two gratings, which are located behind and to the right of the mounting plate support, respectively.

[0007] As a preferred embodiment of this utility model, a front sealing plate is fixedly installed at the front of the frame, left sealing plates are fixedly installed on both the left and right sides of the frame, and a bottom plate is fixedly installed at the bottom of the frame, with the bottom plate located below the cylinder.

[0008] As a preferred embodiment of this utility model, a protective housing is fixedly installed on the top of the frame, a differential pressure leak meter is installed inside the protective housing, and an emergency stop switch is fixedly installed at the front of the protective housing.

[0009] As a preferred technical solution of this utility model, the front sealing plate is provided with a foot cup inside, the upper plate is provided with a slot inside, and the differential pressure side leak meter is fixedly installed with a human-machine interface inside.

[0010] As a preferred embodiment of this utility model, there are multiple mounting plate supports, all of which are located inside the frame; there are multiple limiting nuts, which engage with the mounting plate supports respectively; and there are multiple gratings, which are snapped into the mounting plate supports respectively.

[0011] As a preferred embodiment of this utility model, there are four quick-change lower mold bases, all of which are located inside the frame. There are also four heating tubes, each corresponding to one of the four quick-change lower mold bases.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model has a heating tube upper mold fixedly installed at the bottom of the upper plate, a heating tube base snapped into the bottom of the heating tube upper mold, and a heating tube fixedly installed above the heating tube base. The heating tube base has an air inlet pipe inside. When an airtightness test of the heating tube is required, the heating tube base is first placed below the heating tube upper mold. Then, the cylinder is activated to push the mounting plate support upwards, causing the connecting plate to be driven upwards to snap into the O-ring, thus fixing the heating tube base between the heating tube upper mold and the quick-change mold base, sealing the inside of the heating tube base. The air inlet pipe is then connected to an external high-precision airtightness tester, and compressed air of 8 MPa to 12 MPa is injected. After one minute of pressure stabilization, the pressure is stopped, and the internal air pressure is checked for any difference. If there is no difference, the seal is good; if there is a difference, it is marked and further processing is performed. This achieves the effect of simple operation and improved testing efficiency.

[0014] 2. This utility model features four quick-change lower mold bases that are snapped into the inside of the connecting plate. All four quick-change lower mold bases are located inside the frame. There are also four heating elements, each corresponding to one of the four quick-change lower mold bases. Each of the four heating elements corresponds to one of two different power ratings. When testing is required, the heating elements of different power ratings are simultaneously installed on top of the four quick-change lower mold bases to achieve an internal sealing effect. This allows for the testing of heating elements of different power ratings during airtightness testing, achieving overall intelligence and eliminating the need for different testing devices for different heating elements, thus saving overall testing costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a right view of the overall structure of this utility model;

[0017] Figure 3 This is a front view of the overall structure of this utility model;

[0018] Figure 4 This is a left view of the overall structure of this utility model;

[0019] Figure 5 This is an exploded view of the overall structure of this utility model.

[0020] In the diagram: 1. Frame; 2. Upper plate 1; 3. Upper plate 2; 4. Quick-change lower mold base; 5. O-ring 1; 6. Quick-change lower mold; 7. O-ring 2; 8. Heating element upper mold; 9. Heating element base; 10. Heating element; 11. Connecting plate; 12. Cylinder anti-rotation block; 13. Cylinder mounting plate; 14. Cylinder; 15. Mounting plate support; 16. Limit nut; 17. Grating; 18. Front sealing plate; 19. Left sealing plate; 20. Base plate; 21. Protective housing; 22. Differential pressure side leak meter; 23. Emergency stop switch; 24. Foot cup; 25. Slot; 26. Air inlet pipe; 27. Human-machine interface. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1 to 5As shown, this utility model provides a heating tube airtightness testing device, including a frame 1. An upper plate 2 is fixedly installed inside the frame 1. An upper plate 3 is provided at the bottom of the upper plate 2. A quick-change lower mold base 4 is provided at the bottom of the upper plate 3. An O-ring 5 is provided inside the quick-change lower mold base 4. A quick-change lower mold 6 is provided above the O-ring 5. The quick-change lower mold 6 is located inside the quick-change lower mold base 4. An O-ring 7 is provided inside the quick-change lower mold 6. A heating tube upper mold 8 is fixedly installed at the bottom of the upper plate 2. A heating tube base 9 is snapped into the bottom of the heating tube upper mold 8. A heating tube 10 is fixedly installed above the heating tube base 9. An air inlet pipe 26 is provided inside the heating tube base 9.

[0023] When an airtightness test is required on the heating element 10, first place the heating element base 9 below the heating element upper mold 8. Then, start the cylinder 14 to drive the mounting plate support 15 upward, causing the connecting plate 11 to be driven to move the quick-change mold base 4 upward and engage with the O-ring 2 7. This fixes the heating element base 9 between the heating element upper mold 8 and the quick-change mold base 4, sealing the inside of the heating element base 9. Then, connect the air inlet pipe 26 to an external high-precision airtightness tester and inject compressed air at 8 MPa to 12 MPa. After injecting for one minute and stabilizing the pressure, stop and check if there is a difference in internal air pressure. If there is no difference, it means the seal is good. If there is a difference, mark it and perform subsequent processing. This achieves the effect of simple operation and improved testing efficiency.

[0024] The frame 1 has a connecting plate 11 and a cylinder mounting plate 13 inside. A cylinder anti-rotation block 12 is fixedly installed on the top of the connecting plate 11. A cylinder 14 is fixedly installed on the bottom of the cylinder mounting plate 13. A mounting plate support 15 is fixedly installed on the top of the cylinder mounting plate 13. A limit nut 16 is engaged on the top of the mounting plate support 15. The quick-change lower mold base 4 is snapped into the connecting plate 11.

[0025] The starting cylinder 14 can control the height of the cylinder mounting plate 13 through the output end. Since the quick-change lower mold base 4 is snapped into the connecting plate 11 and the mounting plate support 15 passes through the interior of the connecting plate 11, the height of the quick-change lower mold base 4 can be controlled.

[0026] Among them, there are two gratings 17 fixedly installed on the top of the frame 1, which are located behind and to the right of the mounting plate support 15 respectively.

[0027] The main function of the two gratings 17 is to monitor the angle and distance of movement of the components inside the frame 1, so as to maintain the accuracy of the test docking.

[0028] The frame 1 has a front sealing plate 18 fixedly installed at the front, and left sealing plates 19 fixedly installed on both the left and right sides of the frame 1. The bottom plate 20 is fixedly installed at the bottom of the frame 1 and is located below the cylinder 14.

[0029] The main function of the front sealing plate 18, the left sealing plate 19 and the bottom plate 20 is to protect the internal components of the frame 1 and prevent excessive dust from entering the interior of the frame 1, which could lead to component damage and shorten service life.

[0030] The frame 1 is fixedly mounted with a protective housing 21, the protective housing 21 is equipped with a differential pressure leak meter 22, and the protective housing 21 is fixedly mounted with an emergency stop switch 23.

[0031] The main function of the protective housing 21 is to protect the differential pressure leak meter 22. At the same time, the differential pressure leak meter 22 is electrically connected to the components inside the protective housing 21, so as to monitor the heating tube 10 in real time and ensure the accuracy of the data.

[0032] The front sealing plate 18 has a foot cup 24 inside, the upper plate 2 has a slot 25 inside, and the differential pressure leak meter 22 has a human-machine interface 27 fixedly installed inside.

[0033] The main function of the foot cup 24 is to adjust and control the support components at the bottom of the frame 1, so that the whole device can maintain stability and reduce vibration.

[0034] There are multiple mounting plate supports 15, all of which are located inside the frame 1. There are multiple limit nuts 16, which engage with the mounting plate supports 15 respectively. There are multiple gratings 17, which are snapped into the mounting plate supports 15 respectively.

[0035] The main function of the multiple gratings 17 is to lock and limit the multiple mounting plate supports 15 respectively, so that the multiple mounting plate supports 15 will not rotate.

[0036] There are four quick-change lower mold bases 4, all of which are located inside the frame 1. There are four heating tubes 10, each corresponding to one of the four quick-change lower mold bases 4.

[0037] The four heating elements 10 correspond to two different power levels. When testing is required, the heating elements 10 with different power levels are first installed on the top of the four quick-change mold bases 4 to achieve an internal sealing effect. At this time, when performing airtightness testing, the heating elements 10 with different power levels can be tested, achieving overall intelligence. This eliminates the need for different testing devices for different heating elements 10, saving overall testing costs.

[0038] Working principle and usage process of this utility model:

[0039] First, a heating tube upper mold 8 is fixedly installed at the bottom of the upper plate 2. A heating tube base 9 is snapped into the bottom of the heating tube upper mold 8, and a heating tube 10 is fixedly installed above the heating tube base 9. At the same time, an air inlet pipe 26 is provided inside the heating tube base 9. When it is necessary to test the air tightness of the heating tube 10, the heating tube base 9 is first placed below the heating tube upper mold 8. At this time, the cylinder 14 is activated to drive the mounting plate support 15 to push upward, so that the connecting plate 11 is driven to move the quick-change mold base 4 upward and snap it into the O-ring 7. This fixes the heating tube base 9 in the middle between the heating tube upper mold 8 and the quick-change mold base 4, and seals the inside of the heating tube base 9. Then, the air inlet pipe 26 is connected to an external high-precision air tightness tester, and compressed air of 8 to 12 MPa is injected. After one minute of pressure stabilization, the injection is stopped, and the internal air pressure is checked for any difference. If there is no difference, it means that the sealing is good. If there is a difference, it is marked and further processing is carried out, thereby achieving the effect of simple operation and improved testing efficiency.

[0040] Secondly, after data processing, the products are divided into qualified products and defective products. When a defective product is found, the differential pressure leak meter 22 will light up the light and sound an alarm to indicate the defective product. After marking, the next batch of workpieces will be tested.

[0041] Finally, since there are four quick-change mold bases 4 inside the connecting plate 11, all four quick-change mold bases 4 are located inside the frame 1. At the same time, there are four heating tubes 10, each corresponding to one of the four quick-change mold bases 4. The four heating tubes 10 correspond to two different power levels. When testing is required, the heating tubes 10 with different power levels are first installed on top of the four quick-change mold bases 4 to achieve an internal sealing effect. At this time, when performing airtightness testing, the heating tubes 10 with different power levels can be tested, achieving overall intelligence. This eliminates the need for different heating tubes 10 to correspond to different testing devices, saving overall testing costs.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.

[0043] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heating element airtightness testing device, comprising a frame (1), characterized in that: The frame (1) is fixedly installed with an upper plate 1 (2). The bottom of the upper plate 1 (2) is provided with an upper plate 2 (3). The bottom of the upper plate 2 (3) is provided with a quick-change lower mold base (4). The quick-change lower mold base (4) is provided with an O-ring 1 (5). The upper part of the O-ring 1 (5) is provided with a quick-change lower mold (6). The quick-change lower mold (6) is located inside the quick-change lower mold base (4). The inside of the quick-change lower mold (6) is provided with an O-ring 2 (7). The bottom of the upper plate 1 (2) is fixedly installed with a heating tube upper mold (8). The bottom of the heating tube upper mold (8) is snapped with a heating tube base (9). The upper part of the heating tube base (9) is fixedly installed with a heating tube (10). The inside of the heating tube base (9) is provided with an air inlet pipe (26).

2. The heating element airtightness testing device according to claim 1, characterized in that: The frame (1) is provided with a connecting plate (11) and a cylinder mounting plate (13) inside. A cylinder anti-rotation block (12) is fixedly installed on the top of the connecting plate (11). A cylinder (14) is fixedly installed on the bottom of the cylinder mounting plate (13). A mounting plate support (15) is fixedly installed on the top of the cylinder mounting plate (13). A limit nut (16) is engaged on the top of the mounting plate support (15). The quick-change lower mold base (4) is snapped into the connecting plate (11).

3. The heating element airtightness testing device according to claim 2, characterized in that: A grating (17) is fixedly installed above the frame (1). There are two gratings (17), which are located behind and to the right of the mounting plate support (15), respectively.

4. The heating element airtightness testing device according to claim 2, characterized in that: A front sealing plate (18) is fixedly installed at the front of the frame (1), and left sealing plates (19) are fixedly installed on both the left and right sides of the frame (1). A bottom plate (20) is fixedly installed at the bottom of the frame (1), and the bottom plate (20) is located below the cylinder (14).

5. The heating element airtightness testing device according to claim 4, characterized in that: A protective housing (21) is fixedly installed on the top of the frame (1). A differential pressure leak meter (22) is provided inside the protective housing (21). An emergency stop switch (23) is fixedly installed in front of the protective housing (21).

6. The heating element airtightness testing device according to claim 5, characterized in that: The front sealing plate (18) is provided with a foot cup (24), the upper plate (2) is provided with a slot (25), and the differential pressure side leak meter (22) is fixedly installed with a human-machine interface (27).

7. The heating element airtightness testing device according to claim 3, characterized in that: There are multiple mounting plate supports (15), all of which are located inside the frame (1). There are multiple limiting nuts (16), which engage with the mounting plate supports (15) respectively. There are multiple gratings (17), which are snapped into the mounting plate supports (15) respectively.

8. The heating element airtightness testing device according to claim 1, characterized in that: There are four quick-change lower mold bases (4), all of which are located inside the frame (1). There are four heating tubes (10), each corresponding to one of the four quick-change lower mold bases (4).

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