A bend pipe external air tightness detection device

Abstract

The application relates to the technical field of air tightness detection equipment, in particular to a bent pipe external air tightness detection device, which comprises a base, a placing seat is installed on one side of the base, a top plate is arranged above the base, a pressing plate is arranged between the base and the top plate, a driving cylinder is installed on the top plate, the output end of the driving cylinder is connected with the pressing plate, a sealing cover is installed on the lower side of the pressing plate, a sealing seat is correspondingly installed on the base, a clamping groove is formed in the sealing seat, an inflation mechanism is arranged on one side of the base, air tightness detection is carried out through the inflation mechanism, the workpiece sealing block is clamped in the clamping groove on the sealing seat, the sealing seat and the sealing cover are closed, and the sealing gasket tightly presses the workpiece sealing block in the clamping groove; the structure is simple, the operation is convenient, and the operation convenience is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of airtightness testing equipment technology, and in particular to an external airtightness testing device for a bent pipe. Background Technology

[0002] Traditional cold plate designs integrate the inlet and outlet ports with the battery pack housing. The cold plate inlet is located inside the housing, connected to the housing interface via plastic tubing, and then connected to the vehicle's liquid cooling circulation loop via external tubing. In this design, the cold plate is entirely encapsulated inside the battery pack housing. As the battery pack is a sealed assembly, airtightness testing is only performed on the internal cavity of the liquid cooling plate. As long as the internal cavity of the liquid cooling plate is airtight and leak-free, the design requirements are met. However, the new bent-tube cold plate design, in addition to ensuring the airtightness of the cold plate's internal cavity, also requires control over the sealing reliability of external connections. The bent-tube cold plate uses sealant to fix a C-shaped sealing block for assembly with the housing. It is crucial to ensure the welding quality between the bent tube and the C-shaped sealing block to achieve overall battery pack airtightness compliance.

[0003] Existing airtightness testing for cold plates only tests the airtightness inside the bend, lacking a mechanism for testing the airtightness of the welded joint between the outer tube and the C-shaped sealing block. Furthermore, the existing airtightness testing structure is relatively complex, requiring auxiliary parts such as adapters to achieve clamping and sealing, which is done manually, affecting testing efficiency. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an external airtightness detection device for a bend in a pipe to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides an external airtightness testing device for a bent pipe, comprising a base, a placement seat mounted on one side of the base, a top plate above the base, a lower pressure plate between the base and the top plate, a drive cylinder mounted on the top plate, the output end of the drive cylinder being connected to the lower pressure plate, a sealing cover mounted on the lower side of the lower pressure plate, a corresponding sealing seat mounted on the base, the sealing seat having an engagement groove, and an inflation mechanism mounted on one side of the base, wherein airtightness testing is performed by inflating the pipe through the inflation mechanism.

[0006] A further improvement is that guide posts are installed on the four sides of the base, the top plate is fixedly installed on the upper end of the guide posts, and a guide sleeve is installed on the lower pressure plate, with the guide sleeve slidably fitted on the guide posts.

[0007] A further improvement is that sealing gaskets are provided on both the sealing cover and the sealing seat.

[0008] A further improvement is that the placement seat has a placement groove, a limit post is set in the middle of the placement groove, an installation groove is set in the middle of the limit post, and a pressure rod is rotatably installed on both sides of the installation groove through a rotating shaft.

[0009] A further improvement is that a rotating shaft is rotatably installed on both sides of the mounting groove, and a gear is fixedly sleeved on the rotating shaft. The gears on both sides mesh with each other, and the pressure rod is installed on the side of the gear.

[0010] A further improvement is that a sliding groove is provided in the placement groove, a sliding block is slidably disposed in the sliding groove, the lower end of the limiting post is connected to the sliding block, and a locking bolt is threaded on the sliding block.

[0011] A further improvement is that a limit stop is installed on one side of the sealing cover.

[0012] A further improvement is that the inflation mechanism includes an air compressor installed on one side of the base, and an air pipe connected to one side of the sealing seat, which is connected to the air compressor.

[0013] A further improvement is that a pressure sensor is installed on the trachea.

[0014] The beneficial effects of this invention are as follows: by using a sealing seat and a sealing cover to form a sealed shell with an internal sealed environment, the workpiece sealing block only needs to be engaged in the engagement groove on the sealing seat. When the sealing seat and the sealing cover are closed, the sealing gasket presses the workpiece sealing block tightly in the engagement groove. The structure is simple and easy to operate, reducing the manual clamping and sealing process, enabling rapid clamping and greatly improving operating efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an embodiment of the present invention; Figure 2 This is a top view of the base structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the closing structure of the sealing cover and sealing seat according to an embodiment of the present invention; Figure 4 This is a top view of the placement seat structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the pressure bar structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the placement seat according to an embodiment of the present invention.

[0017] The diagram is marked as follows: 1. Base; 2. Placement seat; 3. Top plate; 4. Lower pressure plate; 5. Drive cylinder; 6. Sealing cover; 7. Sealing seat; 8. Engaging groove; 9. Guide post; 10. Guide sleeve; 11. Sealing gasket; 12. Placement groove; 13. Limiting post; 14. Mounting groove; 15. Pressure rod; 16. Rotating shaft; 17. Gear; 18. Sliding groove; 19. Sliding block; 20. Locking bolt; 21. Limiting stop; 22. Air compressor; 23. Air pipe; 24. Pressure sensor. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0019] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] like Figure 1-6 As shown, this embodiment provides an external airtightness testing device for bent pipes, including a base 1, a placement seat 2 installed on one side of the base 1, a workpiece placed on the placement seat 2, and the end of the workpiece to be tested placed on the base 1; a top plate 3 is provided above the base 1, and a lower pressure plate 4 is provided between the base 1 and the top plate 3; a drive cylinder 5 is installed on the top plate 3, and the output end of the drive cylinder 5 is connected to the lower pressure plate 4; guide columns 9 are installed on the four sides of the base 1, the top plate 3 is fixedly installed on the upper end of the guide columns 9, and a guide sleeve 10 is installed on the lower pressure plate 4. The guide sleeve 10 is slidably sleeved on the guide column 9. The drive cylinder 5 drives the lower pressure plate 4 to move downward, and the lower pressure plate 4 is guided by the cooperation of the guide sleeve 10 and the guide column 9.

[0021] A sealing cover 6 is installed on the lower side of the pressure plate 4, and a sealing seat 7 is installed on the base 1. The sealing cover 6 moves down with the pressure plate 4 and docks with the sealing seat 7 to form a sealed shell. Sealing gaskets 11 are provided on both the sealing cover 6 and the sealing seat 7. The sealing gaskets 11 seal the gap after the sealing cover 6 and the sealing seat 7 are closed, thereby improving the sealing performance between the sealing cover 6 and the sealing seat 7. The sealing gaskets 11 also seal the gap between the workpiece and the sealing cover 6 and the sealing seat 7, ensuring that subsequent airtightness testing remains accurate.

[0022] The sealing seat 7 has a locking groove 8. The end of the workpiece to be tested is locked in the locking groove 8. As the sealing cover 6 and the sealing seat 7 are aligned, the sealing gasket 11 is wrapped around and fitted to the workpiece, reducing the gap between them and ensuring the accuracy of the airtightness test.

[0023] An inflation mechanism is provided on one side of the base 1. The air tightness test is performed by inflating the base 1. The inflation mechanism includes an air compressor 22 installed on one side of the base 1. An air pipe 23 is connected to one side of the sealing seat 7. The air pipe 23 is connected to the air compressor 22. The air compressor 22 inflates the sealed housing formed by the sealing cover 6 and the sealing seat 7 through the air pipe 23 to make the sealed housing reach a certain air pressure. A pressure sensor 24 is installed on the air pipe 23. The pressure sensor 24 changes after inflation stops.

[0024] The placement seat 2 has a placement groove 12, in which the workpiece is positioned. A limiting post 13 is set in the middle of the placement groove 12 to limit the workpiece. An installation groove 14 is set in the middle of the limiting post 13. A pressure rod 15 is rotatably installed on both sides of the installation groove 14 to press and limit the workpiece. A rotating shaft 16 is rotatably installed on both sides of the installation groove 14. A gear 17 is fixedly sleeved on the rotating shaft 16. The gears 17 on both sides mesh. The pressure rod 15 is installed on the side of the gear 17. When one side of the pressure rod 15 is moved, the other side of the pressure rod 15 moves synchronously through the meshing of the gears 17. The two pressure rods 15 on both sides rotate along the rotating shaft 16 to both sides, and the pressure rods 15 press and fix the workpiece from above. The two pressure rods 15 rotate towards each other to facilitate the placement of the workpiece, and rotate in opposite directions to facilitate the limiting of the workpiece. A torsion spring is fitted on the rotating shaft 16. The torsion spring drives the rotating shaft 16 to automatically rotate and reset after the pressure rod 15 is turned and released, which facilitates operation.

[0025] A sliding groove 18 is provided in the placement groove 12, and a sliding block 19 is slidably disposed in the sliding groove 18. The lower end of the limiting post 13 is connected to the sliding block 19, and a locking bolt 20 is threaded onto the sliding block 19. The position of the limiting post 13 is adjusted by sliding the sliding block 19 in the sliding groove 18, and the locking bolt 20 locks the position of the sliding block 19, thereby keeping the position of the limiting post 13 fixed.

[0026] A limit stop 21 is installed on one side of the sealing cover 6. During the downward movement of the sealing cover 6, the limit stop 21 fits against one side of the workpiece. The limit stop 21, together with the limit post 13, limits the workpiece from both ends inside the workpiece to ensure the accurate placement of the workpiece.

[0027] In use, the workpiece is placed on the placement seat 2, and the end of the workpiece to be tested is engaged in the engagement groove 8. The workpiece sealing block is locked with the sealing gasket 11 in the engagement groove 8. The drive cylinder 5 drives the lower pressure plate 4 to move down, so that the sealing cover 6 and the sealing seat 7 close. The sealing gasket 11 on the lower side of the sealing cover 6 is pressed tightly with the workpiece sealing block in the engagement groove 8, thereby forming a sealed shell with a sealed internal environment. The inflation mechanism inflates the sealed environment, and the compressed air is introduced to make the sealed shell reach a certain air pressure. If there is a welding leak point in the workpiece sealing block, after the inflation mechanism stops inflation, the gas in the sealed shell will leak out with the workpiece sealing block leak point, and the air pressure in the sealed shell will decrease. The pressure sensor 24 detects the internal air pressure. When the air pressure drops to the set value, the workpiece sealing block is unqualified for welding and is a defective product.

[0028] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the purpose of proof. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A device for detecting the external airtightness of a bent pipe, comprising a base (1), characterized in that, A placement seat (2) is installed on one side of the base (1), a top plate (3) is set above the base (1), a lower pressure plate (4) is set between the base (1) and the top plate (3), a drive cylinder (5) is installed on the top plate (3), the output end of the drive cylinder (5) is connected to the lower pressure plate (4), a sealing cover (6) is installed on the lower side of the lower pressure plate (4), a sealing seat (7) is installed on the base (1) accordingly, a locking groove (8) is opened on the sealing seat (7), an inflation mechanism is set on one side of the base (1), and an air tightness test is performed by inflating the air through the inflation mechanism.

2. The external airtightness detection device for a bent pipe according to claim 1, characterized in that, The base (1) is equipped with guide columns (9) on all four sides. The top plate (3) is fixedly installed on the upper end of the guide columns (9). The lower pressure plate (4) is equipped with a guide sleeve (10), which is slidably sleeved on the guide column (9).

3. The external airtightness testing device for a bent pipe according to claim 1, characterized in that, Both the sealing cover (6) and the sealing seat (7) are provided with sealing gaskets (11).

4. The external airtightness detection device for a bent pipe according to claim 1, characterized in that, The placement seat (2) is provided with a placement groove (12), a limit post (13) is provided in the middle of the placement groove (12), an installation groove (14) is provided in the middle of the limit post (13), and a pressure rod (15) is rotatably installed on both sides of the installation groove (14).

5. The external airtightness detection device for a bent pipe according to claim 4, characterized in that, Rotary shafts (16) are rotatably installed on both sides of the mounting groove (14). Gears (17) are fixedly sleeved on the rotating shafts (16). The gears (17) on both sides mesh with each other. The pressure rod (15) is installed on the side of the gears (17).

6. The external airtightness detection device for a bent pipe according to claim 4, characterized in that, The placement groove (12) is provided with a sliding groove (18), and a sliding block (19) is slidably arranged in the sliding groove (18). The lower end of the limiting post (13) is connected to the sliding block (19), and a locking bolt (20) is threaded on the sliding block (19).

7. The external airtightness detection device for a bent pipe according to claim 1, characterized in that, A limit stop (21) is installed on one side of the sealing cover (6).

8. The external airtightness detection device for a bent pipe according to claim 1, characterized in that, The inflation mechanism includes an air compressor (22) installed on one side of the base (1), and an air pipe (23) connected to one side of the sealing seat (7). The air pipe (23) is connected to the air compressor (22).

9. The external airtightness detection device for a bent pipe according to claim 8, characterized in that, A pressure sensor (24) is installed on the trachea (23).

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