Vacuum cavity leakage detection device

Abstract

The utility model discloses a vacuum cavity leakage detection device, and relates to the vacuum product leakage detection technology field, the vacuum cavity leakage detection device comprises a first sealing box and a second sealing box, the second sealing box is arranged in the first sealing box, the rear end of the first sealing box is connected with a sealing door through a hinge, and the sealing door is arranged in the second sealing box. Lead screws are installed on the two sides of the bottom in the second sealing box, lifting plates are installed on the outer walls of the lead screws in a threaded mode, grooves are formed in the tops of the lifting plates, bidirectional threaded rods are installed in the grooves, sliding blocks are symmetrically installed on the two sides of the outer walls of the bidirectional threaded rods, and clamping plates are installed on the tops of the sliding blocks; according to the scheme, the problems that an existing vacuum cavity leakage detection device is inconvenient to use, a vacuum leakage detector is often directly connected with a product for detection, and the method wastes time and labor, consumes long time and has high requirements for the detection environment are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vacuum product leak detection technical field, concretely is a kind of vacuum cavity leak detection device. BACKGROUND

[0002] Vacuum leak detection refers to a detection method that determines whether a measured object has a gas leakage phenomenon by detecting the airtightness of the measured object under a certain vacuum degree. In the engineering field, vacuum leak detection is widely used in the aerospace, automobile manufacturing, shipbuilding, electronic equipment, medical equipment and other industries.

[0003] The principle of vacuum leak detection is to detect the gas leakage of a measured object by utilizing the gas flow between the gas inside the measured object and the external vacuum system. In the vacuum system, the gas inside the measured object will escape to the external environment through leaks or cracks. This gas flow will cause the internal gas pressure of the vacuum system to change. By detecting the change in gas pressure, it can be determined whether the measured object has a gas leakage phenomenon.

[0004] The existing vacuum cavity leak detection equipment is inconvenient to use, and is often directly connected with the product using a vacuum leak detector for inspection. This method is time-consuming and labor-intensive, and requires a high detection environment. Therefore, a vacuum cavity leak detection device is proposed to solve the above problems. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a vacuum cavity leak detection device to solve the problem of the existing vacuum cavity leak detection equipment being inconvenient to use, which is often directly connected with the product using a vacuum leak detector for inspection. This method is time-consuming and labor-intensive, and requires a high detection environment.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a vacuum cavity leak detection device, including first sealed box and second sealed box, the second sealed box is located the inside of first sealed box, the rear end hinged connection of first sealed box has sealed door, the both sides of second sealed box inner bottom are installed with lead screw, the outer wall of lead screw is installed with lifting plate, the top of lifting plate is provided with recess, the inside of recess is installed with two -way threaded rod, the both sides of two -way threaded rod outer wall symmetry is installed with sliding block, the top of sliding block is installed with clamping plate, the top of second sealed box is provided with opening, the inner top of first sealed box is installed with hydraulic cylinder, the bottom of hydraulic cylinder is installed with sealed plate, one side outside first sealed box is installed with vacuum pump, the top of vacuum pump is installed with first connecting pipe, the other end of first connecting pipe is located the inside of first sealed box, the bottom of vacuum pump is installed with second connecting pipe, the other end of second connecting pipe is located the inside of second sealed box, the other side outside first sealed box is installed with pressure gauge, the bottom of pressure gauge is installed with third connecting pipe, the other end of third connecting pipe is located the inside of second sealed box.

[0007] Preferably, the sealing door side wall is installed with a sealing strip around.

[0008] Preferably, the sealing door outer wall is installed with a handle on one side.

[0009] Preferably, the lower part of the lead screw is installed with a second bevel gear, the lower part of the two sides outside the second sealed box is installed with a first drive motor, the output shaft of the first drive motor is installed with a first bevel gear through the side wall of the second sealed box, and the first bevel gear is meshed and connected with the second bevel gear.

[0010] Preferably, the middle position of the two-way threaded rod is installed with a third bevel gear, the bottom of the lifting plate is installed with a second drive motor, the output shaft of the second drive motor is installed with a fourth bevel gear, and the fourth bevel gear is meshed and connected with the third bevel gear.

[0011] Preferably, the clamping plate is set to be arc-shaped, and a protective pad is installed on one side of the opposite surfaces of the two clamping plates.

[0012] Preferably, the outer wall of the sealing plate is installed with a sealing ring around.

[0013] Preferably, a one-way valve is installed at the connection between the third connecting pipe and the pressure gauge.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] (1), the utility model discloses a sealing plate is driven to drop to the opening through hydraulic cylinder, can realize the sealing of second sealed box, can realize the sealing of first sealed box through closing the sealing door, through the joint action of sealing strip and sealing ring can effectively improve the leakproofness of first sealed box and second sealed box, avoid the occurrence of air leakage, facilitate the leak detection of vacuum cavity, start vacuum pump, through first connecting pipe can extract the air of second sealed box inside, make second sealed box form negative pressure, through second connecting pipe can extract the air of first sealed box inside, make first sealed box form negative pressure, through first sealed box can ensure the vacuum performance of second sealed box, facilitate the accurate detection of whether the vacuum cavity leaks, through the joint action of pressure gauge and third connecting pipe can detect the pressure change of second sealed box inside gas, and then can effectively judge whether the vacuum cavity leaks, solve the existing vacuum cavity leak detection equipment not convenient to use, often use vacuum leak detector and product direct connection to check, this method is time -consuming and labor -intensive, and the time consumption is relatively long, and the detection environment is required higher.

[0016] (2), through the meshing connection of first bevel gear and second bevel gear, the second bevel gear can be rotated, and then the screw rod is rotated, and the rotation of the screw rod can drive the lifting plate to ascend until the clamping plate extends out of the second sealed box through the opening, through the meshing connection of fourth bevel gear and third bevel gear, the third bevel gear can be rotated, and then the bidirectional screw rod is rotated, through the rotation of the bidirectional screw rod, the two clamping plates can be approached to each other to fix and hold the vacuum cavity, after the vacuum cavity is fixed, the lifting plate can be lowered and the vacuum cavity can be withdrawn into the second sealed box through the reverse rotation of the first drive motor, and the vacuum cavity to be detected can be conveniently fed. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the internal structure schematic diagram of the utility model;

[0018] Figure 2 It is the front view structure schematic diagram of the utility model;

[0019] Figure 3 It is the front view structure schematic diagram of the utility model Figure 1 ;

[0020] Figure 4 It is the front view structure schematic diagram of the utility model Figure 2 ;

[0021] Figure 5 It is the upper view structure schematic diagram of the utility model;

[0022] In the figure: 1, the first sealed box; 2, the second sealed box; 3, the sealing door; 4, the sealing strip; 5, the handle; 6, the screw rod; 7, the second bevel gear; 8, the first drive motor; 9, the first bevel gear; 10, the lifting plate; 11, the groove; 12, the two-way threaded rod; 13, the third bevel gear; 14, the second drive motor; 15, the fourth bevel gear; 16, the sliding block; 17, the clamping plate; 18, the protective pad; 19, the opening; 20, the hydraulic cylinder; 21, the sealing plate; 22, the sealing ring; 23, the vacuum pump; 24, the first connecting pipe; 25, the second connecting pipe; 26, the pressure gauge; 27, the third connecting pipe; 28, the one-way valve. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0024] Please refer to Figures 1-5The utility model provides a kind of vacuum cavity leak detection device of an embodiment: a kind of vacuum cavity leak detection device, including first sealed box 1 and second sealed box 2, second sealed box 2 is located inside first sealed box 1, the rear end hinged connection of first sealed box 1 has sealing door 3, sealing strip 4 is installed around the side wall of sealing door 3, the two sides of second sealed box 2 inner bottom are installed with screw rod 6, the lower portion of screw rod 6 is installed with second bevel gear 7, the lower portion of the two sides outside second sealed box 2 is installed with first drive motor 8, the output shaft of first drive motor 8 is installed with first bevel gear 9, which is penetrated through the side wall of second sealed box 2, first bevel gear 9 is engaged with second bevel gear 7, the outer wall of screw rod 6 is installed with lifting plate 10 with screw thread, the top of lifting plate 10 is provided with recess 11, bidirectional screw rod 12 is installed in recess 11, third bevel gear 13 is installed in the middle position of bidirectional screw rod 12, the bottom of lifting plate 10 is installed with second drive motor 14, the output shaft of second drive motor 14 is installed with fourth bevel gear 15, fourth bevel gear 15 is engaged with third bevel gear 13, the two sides of the outer wall of bidirectional screw rod 12 are installed with slider 16 symmetrically, the top of slider 16 is installed with clamping plate 17, the top of second sealed box 2 is provided with opening 19, the inner top of first sealed box 1 is installed with hydraulic cylinder 20, the bottom of hydraulic cylinder 20 is installed with sealing plate 21, sealing ring 22 is installed around the outer wall of sealing plate 21, when needing to carry out leak detection to vacuum cavity, first drive motor 8 is driven to rotate first bevel gear 9, first bevel gear 9 is engaged with second bevel gear 7 and can drive second bevel gear 7 to rotate, in turn drive screw rod 6 to rotate, the rotation of screw rod 6 can drive lifting plate 10 to rise until clamping plate 17 extends second sealed box 2 through opening 19, fourth bevel gear 15 is driven to rotate by second drive motor 14, fourth bevel gear 15 is engaged with third bevel gear 13 and can drive third bevel gear 13 to rotate, in turn drive bidirectional screw rod 12 to rotate, the rotation of bidirectional screw rod 12 can drive two clamping plates 17 to approach each other and fix and hold vacuum cavity, after fixing completion of vacuum cavity, first drive motor 8 is driven to rotate in reverse direction and can drive lifting plate 10 to descend and vacuum cavity is retrieved to the inside of second sealed box 2, hydraulic cylinder 20 is driven to descend sealing plate 21 to the place of opening 19, the sealing of second sealed box 2 can be realized, the sealing of first sealed box 1 can be realized by closing sealing door 3, the common effect of sealing strip 4 and sealing ring 22 can effectively improve the sealing property of first sealed box 1 and second sealed box 2, avoid the occurrence of air leakage, it is convenient to carry out leak detection to vacuum cavity, one side outside first sealed box 1 is installed with vacuum pump 23, the top of vacuum pump 23 is installed with first connecting pipe 24, the other end of first connecting pipe 24 is located inside first sealed box 1, the bottom of vacuum pump 23 is installed with second connecting pipe 25, the other end of second connecting pipe 25 is located inside second sealed box 2, vacuum pump 23 is started, the air inside second sealed box 2 can be extracted through first connecting pipe 24, so that second sealed box 2 forms negative pressure,The air inside the first sealed box 1 can be extracted through the second connecting pipe 25, so that the first sealed box 1 forms a negative pressure, and the vacuum performance of the second sealed box 2 can be ensured through the first sealed box 1, so that the leakage of the vacuum cavity can be accurately detected, and the other side of the outside of the first sealed box 1 is provided with a pressure gauge 26, the bottom of the pressure gauge 26 is provided with a third connecting pipe 27, the other end of the third connecting pipe 27 is located in the inside of the second sealed box 2, a one-way valve 28 is arranged at the connecting position of the third connecting pipe 27 and the pressure gauge 26, the pressure change of the gas in the second sealed box 2 can be detected through the cooperation of the pressure gauge 26 and the third connecting pipe 27, and the leakage of the vacuum cavity can be effectively judged, and the one-way valve 28 can prevent the gas from flowing back to the inside of the second sealed box 2, so that the vacuum state of the system is maintained, and the pressure fluctuation and system damage caused by the backflow of the gas are prevented.

[0025] Please refer to Figure 2 The outer wall of the sealing door 3 is provided with a handle 5, and the sealing door 3 is opened and closed through the handle 5, so that the practicability of the sealing door 3 is improved.

[0026] Please refer to Figure 5 The clamping plates 17 are arc-shaped, and the opposite sides of the two clamping plates 17 are provided with protective pads 18, so that the vacuum cavity is clamped through the arc-shaped clamping plates 17, and the protective ability of the clamping plates 17 to the vacuum cavity is improved through the protective pads 18, so that the surface of the vacuum cavity is prevented from being damaged and affecting the leakage detection of the vacuum cavity.

[0027] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. A vacuum cavity leakage detection device, comprising a first sealed chamber (1) and a second sealed chamber (2), characterized in that: The second sealing box (2) is located inside the first sealing box (1). The rear hinge of the first sealing box (1) is connected to a sealing door (3). Screws (6) are installed on both sides of the bottom of the second sealing box (2). A lifting plate (10) is threaded on the outer wall of the screw (6). A groove (11) is provided on the top of the lifting plate (10). A double-threaded rod (12) is installed inside the groove (11). Slider blocks (16) are symmetrically installed on both sides of the outer wall of the double-threaded rod (12). A clamping plate (17) is installed on the top of the slider (16). An opening (19) is provided on the top of the second sealing box (2). A hydraulic cylinder (20) is installed on the inner top of the first sealing box (1). A sealing plate (21) is installed at the bottom of the hydraulic cylinder (20). A vacuum pump (23) is installed on one side outside the first sealing box (1). A first connecting pipe (24) is installed on the top of the vacuum pump (23). The other end of the first connecting pipe (24) is located inside the first sealing box (1). A second connecting pipe (25) is installed at the bottom of the vacuum pump (23). The other end of the second connecting pipe (25) is located inside the second sealing box (2). A pressure gauge (26) is installed on the other side outside the first sealing box (1). A third connecting pipe (27) is installed at the bottom of the pressure gauge (26). The other end of the third connecting pipe (27) is located inside the second sealing box (2).

2. The vacuum cavity leakage detection device according to claim 1, characterized in that: The sealing door (3) has sealing strips (4) installed around its side walls.

3. The vacuum cavity leakage detection device according to claim 1, characterized in that: A handle (5) is installed on one side of the outer wall of the sealed door (3).

4. The vacuum cavity leakage detection device according to claim 1, characterized in that: A second bevel gear (7) is installed at the lower part of the lead screw (6), and a first drive motor (8) is installed at the lower part of both sides of the second sealing box (2). A first bevel gear (9) is installed on the output shaft of the first drive motor (8) through the side wall of the second sealing box (2). The first bevel gear (9) meshes with the second bevel gear (7).

5. The vacuum cavity leakage detection device according to claim 1, characterized in that: A third bevel gear (13) is installed at the middle position of the bidirectional threaded rod (12), a second drive motor (14) is installed at the bottom of the lifting plate (10), a fourth bevel gear (15) is installed on the output shaft of the second drive motor (14), and the fourth bevel gear (15) meshes with the third bevel gear (13).

6. The vacuum cavity leakage detection device according to claim 1, characterized in that: The clamping plate (17) is arc-shaped, and a protective pad (18) is installed on one side of the opposite face of the two clamping plates (17).

7. A vacuum cavity leakage detection device according to claim 1, characterized in that: A sealing ring (22) is installed around the outer wall of the sealing plate (21).

8. A vacuum cavity leakage detection device according to claim 1, characterized in that: A one-way valve (28) is installed at the connection between the third connecting pipe (27) and the pressure gauge (26).

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