A weld vacuum leak detection device

Abstract

The present invention discloses a weld vacuum leak detection device, which relates to the technical field of weld leak detection, comprising a vacuum cover with an opening at the bottom, a pump body for evacuating the vacuum cover is arranged on the top of the vacuum cover, a pressure gauge for detecting the air pressure inside the vacuum cover is installed on the side wall of the vacuum cover, a first sealing block is arranged on the surface of the bottom opening of the vacuum cover, and two No. 1 rods are symmetrically arranged on the outer side wall of the vacuum cover, and the end of the No. 1 rod away from the vacuum cover is fixedly connected to a vertically arranged threaded sleeve, and the threaded sleeve penetrates and is rotatably connected to a first threaded rod in the up and down directions, and the bottom end of the first threaded rod is rotatably set in a threaded hole opened in the top of the No. 2 rod, and the bottom end of the No. 2 rod is fixedly connected to a supporting plate for supporting a plate A to be tested; the first sealing block is squeezed by the vacuum cover to improve the sealing effect of the connection between the vacuum cover and the plate A to be tested.

Description

Technical Field

[0001] The invention relates to the technical field of weld leak detection, in particular to a weld vacuum leak detection device. Background Art

[0002] Welds are produced during the welding process. The integrity of the welds is directly related to the strength and stability of the structure. Leak detection of welds can promptly detect defects in the welds, such as pores and cracks, to prevent dangerous situations such as structural failure and leakage during use, and ensure the safety of equipment and personnel.

[0003] A Chinese patent application, with publication number CN221055985U, discloses a simple-to-use weld leak detection vacuum box, which relates to the technical field of weld leak detection devices. The utility model includes a detection box body, the bottom of which is provided with an opening for covering the weld, and a sealing ring gasket is fixedly installed on the side wall of the bottom opening of the detection box body, an observation window is provided on the side wall of the detection box body, and a vacuum detection gauge is fixedly installed on the upper side wall of the detection box body. The utility model reduces the use requirements and auxiliary equipment of the vacuum box during detection, plays the effect of reducing the cost of using the vacuum box, and also makes it more convenient to use. There is no need to install an air inlet valve on the box body to balance the pressure inside the box. After the detection is completed, the compressed air source valve is closed to restore the pressure inside the box to atmospheric pressure. Compared with the existing detection vacuum box, it saves materials in production, thereby further playing the effect of reducing costs.

[0004] In the above application documents, the opening at the bottom of the detection box is used to cover the area around the weld, and a sealing ring is used to seal the bottom of the detection box and the wall around the weld, and then leaks are detected. However, the device has the following disadvantages when used: the detection box is only buckled on the weld, and the sealing effect between the bottom of the detection box and the weld is poor. Moreover, when the wall around the weld is uneven, the sealing ring alone cannot achieve a sealing effect, which ultimately leads to large detection errors. For this reason, the present invention provides a weld vacuum leak detection device. Summary of the Invention

[0005] The technical problem solved by the present invention is that the existing weld vacuum leak detection device only buckles the detection box body on the weld seam, and the sealing effect between the bottom of the detection box body and the weld seam is poor. Moreover, when the wall around the weld seam is uneven, the sealing effect cannot be achieved by relying solely on the sealing ring gasket, which ultimately leads to large detection errors.

[0006] The present invention can be implemented through the following technical solutions: a weld vacuum leak detection device, comprising a vacuum cover with an opening at the bottom, a pump body for evacuating the vacuum cover is provided on the top of the vacuum cover, a pressure gauge for detecting the air pressure inside the vacuum cover is installed on the side wall of the vacuum cover, a first sealing block is provided on the surface of the bottom opening of the vacuum cover, and two No. 1 rods are symmetrically provided on the outer wall of the vacuum cover, and the end of the No. 1 rod away from the vacuum cover is fixedly connected to a vertically arranged threaded sleeve, and the threaded sleeve passes through and is rotatably connected to a first threaded rod in the up and down directions, and the bottom end of the first threaded rod is rotatably set in a threaded hole opened in the top of the No. 2 rod, and the bottom end of the No. 2 rod is fixedly connected to a support plate for supporting the plate A to be tested; when the first threaded rod rotates, the first threaded rod moves downward relative to the threaded sleeve and the No. 2 rod, the distance between the No. 1 rod and the plate A to be tested is shortened, and the vacuum cover compresses the first sealing block.

[0007] A further technical improvement of the present invention is that: the outer side wall of the vacuum cover is symmetrically fixedly connected with two horizontally arranged sleeves, the end of the No. 1 rod away from the threaded sleeve is inserted into the hole groove in the sleeve, and the No. 1 rod and the hole groove are in a sliding fit state; a limiting screw is penetrated and rotatably provided on the side of the top of the sleeve away from the vacuum cover.

[0008] A further technical improvement of the present invention is that: a positioning block is fixedly connected to the bottom of the vacuum cover, and the first sealing block is fixedly connected to the bottom of the positioning block.

[0009] A further technical improvement of the present invention is that: a first groove body with an upward recess is provided at the bottom of the positioning block, a second groove body with a downward recess is provided at the top of the sealing block, and the first groove body and the second groove body are in a connected state; a plurality of second threaded rods are provided through and rotatably arranged on the top of the positioning block; a pressure block is placed in the second groove body, and when the second threaded rod rotates, the pressure block is pushed downward to squeeze the sealing block close to the surface of the plate A to be tested.

[0010] A further technical improvement of the present invention is that the bottom of the second trough body is a downwardly concave curved surface, and the left and right sides of the curved surface are connected to the inner wall of the second trough body in a continuous manner.

[0011] A further technical improvement of the present invention is that a downwardly protruding arc block is fixedly provided on the bottom of the pressing block, and the bottom contour of the arc block is adapted to the contour of the arc surface.

[0012] A further technical improvement of the present invention is that a connecting block is fixed to the outer wall of the positioning block, a second sealing block is fixedly connected to the bottom of the connecting block, an exhaust pipe is connected to the top of the connecting block, and the other end of the exhaust pipe is connected to the pump body.

[0013] A further technical improvement of the present invention is that the elastic coefficient of the first sealing block is greater than the elastic coefficient of the second sealing block, and the bottom of the first sealing block is higher than the bottom of the second sealing block.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In the present invention, the first threaded rod and the second rod are connected together, and the nut at the top of the first threaded rod is pressed on the top of the threaded sleeve. At this time, the bottom end of the first threaded rod can continue to extend into the threaded hole. Since the bottom end of the first threaded rod continuously enters the threaded hole at the top of the second rod, the distance between the first rod and the plate A to be tested is reduced, and the vacuum cover can squeeze the first sealing block, so that the sealing between the bottom of the vacuum cover and the plate A to be tested is greatly enhanced, thereby ensuring the sealing effect of the vacuum cover and ensuring the accuracy of the vacuum cover in weld detection.

[0016] 2. In the present invention, when the surface of the plate A to be tested is uneven, the first sealing block cannot fully contact the surface of the plate A to be tested. At this time, it is necessary to rotate the second threaded rod to make the second threaded rod move downward, and push the pressure block downward to squeeze the second groove body, so that the first sealing block under the second groove body is tightly attached to the top of the plate A to be tested, further improving the sealing of the connection between the vacuum cover and the plate A to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0019] Figure 2 For the present invention Figure 1 A partial enlarged view of point B in the middle;

[0020] Figure 3 For the present invention Figure 1 A partial enlarged view of point C in the middle;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the first sealing block in the present invention.

[0022] In the figure: 1. Vacuum cover; 2. Pump body; 3. Pressure gauge; 4. First sealing block; 5. Rod No. 1; 6. Threaded sleeve; 7. First threaded rod; 8. Rod No. 2; 9. Threaded hole; 10. Support plate; 11. Sleeve; 12. Hole groove; 13. Limit screw; 14. Positioning block; 15. First trough body; 16. Second trough body; 17. Second threaded rod; 18. Pressing block; 19. Curved surface; 20. Curved block; 21. Connecting block; 22. Second sealing block; A. Panel to be tested; 23. Exhaust pipe. DETAILED DESCRIPTION

[0023] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0024] See also Figure 1-Figure 4 The figure shows a weld vacuum leak detection device, comprising a vacuum cover 1 with an opening at the bottom, a pump body 2 for evacuating the vacuum cover 1 is provided on the top of the vacuum cover 1, a pressure gauge 3 for detecting the internal air pressure of the vacuum cover 1 is installed on the side wall of the vacuum cover 1, a first sealing block 4 is provided on the surface of the bottom opening of the vacuum cover 1, and two No. 1 rods 5 are symmetrically provided on the outer wall of the vacuum cover 1, and the No. 1 rod 5 is fixedly connected to a vertically arranged threaded sleeve 6 at one end away from the vacuum cover 1, and the threaded sleeve 6 passes through and is rotatably connected to a first threaded rod 7 in the up and down directions, and the bottom end of the first threaded rod 7 is rotatably set in a threaded hole 9 opened at the top of the No. 2 rod 8, and the bottom end of the No. 2 rod 8 is fixedly connected to a support plate 10 for supporting a plate A to be tested; when the first threaded rod 7 rotates, the first threaded rod 7 moves downward relative to the threaded sleeve 6 and the No. 2 rod 8, the distance between the No. 1 rod 5 and the plate A to be tested is shortened, and the vacuum cover 1 compresses the first sealing block 4;

[0025] When the above scheme is implemented, the support plate 10 is first placed on the bottom of the plate A to be tested to support the plate A to be tested, and then the vacuum cover 1 is placed on the top of the plate A to be tested, and the vacuum cover 1 covers the weld to be tested, and then the first threaded rod 7 is rotated and the support plate 10 is pressed, so that the first threaded rod 7 moves downward along the threaded sleeve 6, and the bottom end of the first threaded rod 7 enters the threaded hole 9 at the top of the second rod 8, and the first threaded rod 7 cooperates with the thread in the threaded hole 9, so that the first threaded rod 7 and the second rod 8 are connected. 8 are connected together, the nut on the top of the first threaded rod 7 will be pressed on the top of the threaded sleeve 6, and at this time the bottom end of the first threaded rod 7 can continue to extend into the threaded hole 9. Since the bottom end of the first threaded rod 7 continuously enters the threaded hole 9 at the top of the No. 2 rod 8, the distance between the No. 1 rod 5 and the plate A to be tested is reduced, and the vacuum cover 1 can squeeze the first sealing block 4, so that the sealing between the bottom of the vacuum cover 1 and the plate A to be tested is greatly enhanced, thereby ensuring the sealing effect of the vacuum cover 1 and ensuring the accuracy of the weld detection by the vacuum cover 1.

[0026] In the above solution, the whole formed by the second rod 8 and the supporting plate 10 can be separated from the vacuum cover 1, which is convenient for replacing parts and also brings convenience to transportation.

[0027] Furthermore, the outer wall of the vacuum cover 1 is symmetrically fixedly connected with two horizontally arranged sleeves 11, and the end of the No. 1 rod 5 away from the threaded sleeve 6 is inserted into the hole groove 12 in the sleeve 11, and the No. 1 rod 5 and the hole groove 12 are in a sliding fit state; a limit screw 13 is passed through and rotatably provided on the side of the top of the sleeve 11 away from the vacuum cover 1; in order to adapt to different sizes of panels to be tested, a sleeve 11 is provided on the outer wall of the vacuum cover 1, and the sliding fit between the sleeve 11 and the No. 1 rod 5 increases the overall length of the vacuum cover 1, so that the vacuum cover 1 can be fixed on the longer panel A to be tested; in specific operation, it is only necessary to loosen the limit screw 13 first, and then push the No. 1 rod 5 to change the length of the hole groove 12 on the sleeve 11. When the length of the No. 1 rod 5 is adjusted, it is only necessary to tighten the limit screw 13 again so that the bottom end of the limit screw 13 is pressed on the top of the No. 1 rod 5 to fix the position of the No. 1 rod 5 in the sleeve 11.

[0028] Furthermore, a positioning block 14 is fixedly connected to the bottom of the vacuum cover 1, and the first sealing block 4 is fixedly connected to the bottom of the positioning block 14; by setting the positioning block 14, the bottom wall thickness of the vacuum cover 1 is increased, and the thicker first sealing block 4 is combined to achieve sealing between the vacuum cover 1 and the plate A to be tested.

[0029] Furthermore, the bottom of the positioning block 14 is provided with a first groove body 15 which is concave upward, and the top of the first sealing block 4 is provided with a second groove body 16 which is grooved downward, and the first groove body 15 and the second groove body 16 are in a connected state; a plurality of second threaded rods 17 are passed through and rotatably provided on the top of the positioning block 14; a pressure block 18 is placed in the second groove body 16, and when the second threaded rod 17 rotates, the pressure block 18 is pushed downward to squeeze the sealing block close to the surface of the plate A to be tested; when the surface of the plate A to be tested is uneven, the first sealing block 4 cannot fully contact the surface of the plate A to be tested, and at this time, the second threaded rod 17 needs to be rotated so that the second threaded rod 17 moves downward and pushes the pressure block 18 downward to squeeze the second groove body 16, so that the first sealing block 4 under the second groove body 16 is tightly fitted to the top of the plate A to be tested, further improving the sealing of the connection between the vacuum cover 1 and the plate A to be tested.

[0030] In the above, the bottom of the second trough body 16 is a downwardly concave curved surface 19, and the left and right sides of the curved surface 19 are connected to the inner wall of the second trough body 16 in a continuous manner; the bottom of the pressing block 18 is fixedly provided with a downwardly protruding curved block 20, and the bottom contour of the curved block 20 is adapted to the contour of the curved surface 19; by setting the bottom of the second trough body 16 as a downwardly concave curved surface 19, and coordinating with the bottom of the pressing block 18 with a downwardly protruding curved block 20 adapted to the contour of the curved surface 19, when the pressing block 18 squeezes the second trough body 16 downward, the deformation of the second trough body 16 during downward stretching is smoother, the damage to the first sealing block 4 is reduced, and the service life of the first sealing block 4 is extended.

[0031] To further improve the sealing effect, a connecting block 21 is fixed to the outer wall of the positioning block 14. A second sealing block 22 is fixedly connected to the bottom of the connecting block 21. An exhaust pipe 23 is connected to the top of the connecting block 21, and the other end of the exhaust pipe 23 is connected to the pump body 2. When the vacuum cover 1 is pressed against the top of the plate A to be tested, the second sealing block 22 is in a compressed state together with the first sealing block 4, thereby sealing the connection between the vacuum cover 1 and the plate A to be tested. The second sealing block 22 is fixedly connected to the bottom of the connecting block 21. A cavity is formed between the connecting block 21, the second sealing block 22, the positioning block 14, the first sealing block 4, and the top of the plate A to be tested. When the pump body 2 is working, the gas in the cavity is also extracted, so that the vacuum degree of the cavity is the same as that of the vacuum cover 1, so as to ensure that the pressure of the first sealing block 4 on the side of the above-mentioned cavity is the same as that on the side of the vacuum cover 1, thereby ensuring the sealing performance of the first sealing block 4.

[0032] Furthermore, the elastic coefficient of the first sealing block 4 is greater than the elastic coefficient of the second sealing block 22, and the bottom of the first sealing block 4 is higher than the bottom of the second sealing block 22; when the vacuum cover 1 is pressed on the top of the plate A to be tested, the second sealing block 22 has a large elastic deformation and is in close contact with the plate A to be tested, further improving the sealing effect of the connection between the vacuum cover 1 and the plate A to be tested.

[0033] When the present invention is in use, the support plate 10 is first placed on the bottom of the plate to be tested A to support the plate to be tested A, and then the vacuum cover 1 is placed on the top of the plate to be tested A, and the vacuum cover 1 covers the weld to be tested, and the limit screw 13 is loosened and then the No. 1 rod 5 is pushed to change the length of the hole 12 on the sleeve 11. When the length of the No. 1 rod 5 is adjusted, the limit screw 13 is tightened again so that the bottom end of the limit screw 13 is pressed on the top of the No. 1 rod 5, so as to fix the position of the No. 1 rod 5 in the sleeve 11 and adapt it to the plate A to be tested of different lengths; then the first threaded rod 7 is rotated again, and the support plate 10 is pressed down so that the first threaded rod 7 moves downward along the threaded sleeve 6, and the bottom end of the first threaded rod 7 will enter the threaded hole 9 at the top of the No. 2 rod 8, and the first threaded rod 7 cooperates with the thread in the threaded hole 9, so that the first threaded rod 7 and the No. 2 rod 8 are connected together, and the first threaded rod 7 is screwed. The nut at the top of the threaded rod 7 will be pressed on the top of the threaded sleeve 6. At this time, the bottom end of the first threaded rod 7 can continue to extend into the threaded hole 9. Since the bottom end of the first threaded rod 7 continuously enters the threaded hole 9 at the top of the No. 2 rod 8, the distance between the No. 1 rod 5 and the plate A to be tested is reduced, and the vacuum cover 1 can squeeze the first sealing block 4, so that the sealing between the bottom of the vacuum cover 1 and the plate A to be tested is greatly enhanced, thereby ensuring the sealing effect of the vacuum cover 1 and ensuring the accuracy of the weld detection of the vacuum cover 1; when the surface of the plate A to be tested is uneven, the first sealing block 4 cannot fully contact the surface of the plate A to be tested. At this time, it is necessary to rotate the second threaded rod 17 to make the second threaded rod 17 move downward and push the pressure block 18 to squeeze the second groove body 16 downward, so that the first sealing block 4 under the second groove body 16 is tightly fitted to the top of the plate A to be tested, further improving the sealing of the connection between the vacuum cover 1 and the plate A to be tested.

[0034] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A weld vacuum leak detection device, comprising a vacuum cover (1) with an opening at the bottom, a pump body (2) for evacuating the vacuum cover (1) being provided on the top of the vacuum cover (1), and a pressure gauge (3) for detecting the internal air pressure of the vacuum cover (1) being installed on the side wall of the vacuum cover (1), characterized in that: A first sealing block (4) is provided on the surface of the bottom opening of the vacuum cover (1), and two No. 1 rods (5) are symmetrically provided on the outer side wall of the vacuum cover (1), and one end of the No. 1 rod (5) away from the vacuum cover (1) is fixedly connected to a vertically arranged threaded sleeve (6), and the threaded sleeve (6) passes through and is rotatably connected to a first threaded rod (7) in the up and down directions, and the bottom end of the first threaded rod (7) is rotatably set in a threaded hole (9) opened at the top of the No. 2 rod (8), and the bottom end of the No. 2 rod (8) is fixedly connected to a support plate (10) for supporting the plate to be tested (A); when the first threaded rod (7) rotates, the first threaded rod (7) moves downward relative to the threaded sleeve (6) and the No. 2 rod (8), the distance between the No. 1 rod (5) and the plate to be tested (A) is shortened, and the vacuum cover (1) compresses the first sealing block (4); Two sleeves (11) arranged horizontally are symmetrically fixedly connected to the outer side wall of the vacuum cover (1); one end of the No. 1 rod (5) away from the threaded sleeve (6) is inserted into the hole groove (12) in the sleeve (11), and the No. 1 rod (5) and the hole groove (12) are in a sliding fit state; a limit screw (13) is rotatably provided on the side of the top of the sleeve (11) away from the vacuum cover (1); The bottom of the vacuum cover (1) is fixedly connected to a positioning block (14), and the first sealing block (4) is fixedly connected to the bottom of the positioning block (14); The bottom of the positioning block (14) is provided with a first groove body (15) that is concave upward, and the top of the sealing block is provided with a second groove body (16) that is grooved downward, and the first groove body (15) and the second groove body (16) are in a connected state; a plurality of second threaded rods (17) are provided through and rotatably arranged on the top of the positioning block (14); a pressure block (18) is placed in the second groove body (16), and when the second threaded rod (17) rotates, the pressure block (18) is pushed downward to squeeze the first sealing block against the surface of the plate (A) to be tested.

2. A weld vacuum leak detection device according to claim 1, characterized in that: The bottom of the second trough body (16) is a downwardly concave curved surface (19), and the left and right sides of the curved surface (19) are connected to the inner wall of the second trough body (16) in a continuous manner.

3. A weld vacuum leak detection device according to claim 2, characterized in that: A downwardly protruding curved block (20) is fixedly provided at the bottom of the pressing block (18), and the bottom contour of the curved block (20) is adapted to the contour of the curved surface (19).

4. A weld vacuum leak detection device according to claim 1, characterized in that: A connecting block (21) is also fixed to the outer wall of the positioning block (14), a second sealing block (22) is fixedly connected to the bottom of the connecting block (21), an air extraction pipe (23) is connected to the top of the connecting block (21), and the other end of the air extraction pipe (23) is connected to the pump body (2).

5. A weld vacuum leak detection device according to claim 4, characterized in that: The elastic coefficient of the first sealing block (4) is greater than the elastic coefficient of the second sealing block (22), and the bottom of the first sealing block (4) is higher than the bottom of the second sealing block (22).

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