Air tightness detector capable of preventing air leakage

Abstract

The utility model discloses an anti-air-leakage air tightness detector body which comprises a detector body, a first sealing box is installed on the upper end face of the detector body, the first sealing box and the detector body are welded and fixed, a second sealing box is arranged above the first sealing box, the second sealing box and the first sealing box are connected in a clamped mode, and the first sealing box and the second sealing box are connected in a clamped mode. A top plate is arranged above the second sealing box, fixing rods are installed on the front portion and the rear portion of the upper end face of the detector body, bases of the fixing rods are fixedly welded to the detector body, lifting rods are slidably limited in the fixing rods and extend to the outer portions of the fixing rods, and fixing bases are fixedly installed at the upper ends of the lifting rods. A clamping plate is mounted at the upper end of the fixed seat, and the clamping plate is connected with the fixed seat through a rotating shaft, and the device can be conveniently operated by a worker on the premise of ensuring the air leakage prevention of the air tightness detector.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detectors, in particular to an air leak-proof air tightness detector. Background Art

[0002] The airtightness tester is an efficient and accurate device specially used to detect the sealing performance of products or components. With the continuous advancement of industrial manufacturing technology and the increasing requirements for product quality, airtightness testers have been widely used in many fields and have become an important tool to ensure product quality and safety. The airtightness tester is used to judge the sealing performance of the tested part by filling a certain pressure of gas into the tested part and then observing the change in gas pressure. When there is a leak in the tested part, the internal gas will escape through the leak point, causing the pressure to drop. The airtightness tester monitors the changes in gas pressure in real time through a high-precision solenoid valve, and analyzes it through a data processing system, so as to accurately judge the sealing condition of the tested part.

[0003] For example, the Chinese authorized patent "A leak-proof airtightness detector" with announcement number CN220542347U includes a detection tank and a sealing cover. A sealing device is provided at the connection between the detection tank and the sealing cover. The sealing device includes a sealing sleeve, a first elastic ring, a second elastic ring, an elastic rope and an adjusting piece. The sealing sleeve is on the detection tank and the sealing cover, the first elastic ring and the second elastic ring are respectively fixed at two ends of the sealing sleeve, the first elastic ring is placed on the sealing cover, and the second elastic ring is placed on the detection tank. An adjusting sleeve is provided on the sealing sleeve, the elastic rope passes through the adjusting sleeve, and the adjusting piece is placed on the elastic rope. The elastic rope is tightened through the connection between the sealing sleeve and the sealing cover and the detection tank, so that the adjusting sleeve is contracted, and then the elastic rope is fixed by the adjusting piece to seal the connection between the sealing cover and the detection tank.

[0004] Although the above-mentioned existing technology can achieve the anti-leakage effect of the airtightness detector, the structure is relatively complex and the operation is relatively troublesome, which greatly affects the work efficiency of the workpiece airtightness detection. Therefore, it does not meet the existing needs. In this regard, we propose an anti-leakage airtightness detector. Utility Model Content

[0005] The utility model aims to provide an airtightness detector that is leak-proof, so as to solve the problem raised in the above background technology of how to facilitate the operation of the staff under the premise of ensuring that the airtightness detector is leak-proof.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an air-leakage-proof airtightness detector, comprising a detector body, a first sealing box is installed on the upper end surface of the detector body, and the first sealing box is welded and fixed to the detector body, a second sealing box is arranged above the first sealing box, and the second sealing box is clamped with the first sealing box, a top plate is arranged above the second sealing box, fixing rods are installed at the front and rear of the upper end surface of the detector body, and the base of the fixing rod is welded and fixed to the detector body, a lifting rod is provided at the internal sliding limit of the fixing rod, and the lifting rod extends to the outside of the fixing rod, a fixing seat is fixedly installed on the upper end of the lifting rod, a clamping plate is installed on the upper end of the fixing seat, and the clamping plate and the fixing seat are connected by a rotating shaft.

[0007] Preferably, a first motor is fixedly installed at the lower end of the fixed rod, and a screw is installed on the output shaft of the first motor. The screw extends to the inside of the lifting rod, and the internal screw hole of the lifting rod is adapted to the external thread of the screw. A second motor is installed inside the fixed seat, and the output shaft of the second motor is fixed to the rotating shaft of the clamping plate through a coupling.

[0008] Preferably, a rubber block is provided on the upper end surface of the first sealing box, a groove is provided on the surface of the rubber block which is concave inward, and the rubber block is adhered and fixed to the first sealing box, and a sealing protrusion is provided on the lower end of the second sealing box, and the sealing protrusion is engaged with the rubber block.

[0009] Preferably, a pressure sensor is installed in the cavity formed by the first sealing box and the second sealing box, an air injection pipe is provided on one side of the first sealing box, and the other end of the air injection pipe is connected to the air pump inside the detector body, and an electromagnetic valve is installed in the middle position of the air injection pipe.

[0010] Preferably, an indicator light is provided on one side of the front fixing rod, two indicator lights are provided, and the indicator lights are fixed to the detector body by screws.

[0011] Preferably, guide rods are installed on both sides between the top plate and the detector body, and the guide rods are rotatably connected to the top plate and the detector body respectively, and a guide slider is slidably installed on the outside of the guide rods, and the inner side of the guide slider is fixed to the second sealing box.

[0012] Preferably, a hydraulic lifting device is installed at the middle position of the bottom of the top plate, and the movable end of the hydraulic lifting device is fixed to the second sealing box by bolts.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model uses a sealing box clamping mechanism. After the staff puts the workpiece to be tested into the first sealing box, as the hydraulic lifting device descends, the second sealing box is closed to the first sealing box. At this time, the second motor is turned on, and its output shaft drives the clamping plate to rotate 180 degrees to ensure that it is located above the second sealing box. Then the first motor is turned on, and its output shaft drives the screw to rotate. Under the friction between its external thread and the inner screw hole of the lifting rod, the lifting rod drives the clamping plate to move continuously downwards under the guidance of the inner cavity of the fixed rod on the lifting rod until it contacts the upper end surface of the second sealing box and clamps it. The sealing box clamping mechanism can cooperate with the hydraulic lifting device to achieve clamping and fixing of the sealing box, and eliminate the gap between the first sealing box and the second sealing box to the greatest extent, thereby avoiding air leakage during the detection process.

[0015] 2. The utility model provides a rubber block at the upper end of the first sealing box, and a groove body recessed inwardly is provided on the surface of the rubber block. Meanwhile, a sealing protrusion is provided at the lower end of the second sealing box. When the first sealing box and the second sealing box are in contact, the sealing protrusion can enter into the groove body of the rubber block. The elastic structure can increase the tightness of the contact between the two, thereby achieving sealing between each other and effectively avoiding air leakage during air tightness detection.

[0016] 3. The utility model is provided with a pre-detection mechanism. Under normal circumstances, the first sealing box and the second sealing box remain closed. Before the workpiece to be tested is placed, high-pressure air is injected into the sealing box through the air pump inside the detector, and then the sealing chamber is pressurized by closing the solenoid valve. Within the set time, if the air pressure inside the sealing chamber is maintained at the set value, the indicator light shows green, and the staff can carry out subsequent detection work. If the air pressure inside the sealing chamber decreases, it means that the sealing box is leaking. At this time, the indicator light shows red, and the staff should stop the detection and repair the detector to avoid a decrease in the accuracy of subsequent detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the fixing rod of the utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure between the first sealing box and the second sealing box of the utility model;

[0020] Figure 4 It is a top view of the second sealing box of the utility model.

[0021] In the figure: 1. detector body; 2. first sealing box; 3. second sealing box; 4. top plate; 5. hydraulic lifting device; 6. guide rod; 7. guide slide block; 8. fixing rod; 9. lifting rod; 10. fixing seat; 11. clamping plate; 12. indicator light; 13. gas injection pipe; 14. solenoid valve; 15. first motor; 16. screw; 17. second motor; 18. rubber block; 19. sealing bump. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] See also Figure 1-4 The utility model provides an embodiment: an airtight detector for preventing air leakage, comprising a detector body 1, a first sealing box 2 is installed on the upper end surface of the detector body 1, and the first sealing box 2 is welded and fixed to the detector body 1, a second sealing box 3 is arranged above the first sealing box 2, and the second sealing box 3 is clamped with the first sealing box 2, a top plate 4 is arranged above the second sealing box 3, a fixing rod 8 is installed at the front and rear of the upper end surface of the detector body 1, and the base of the fixing rod 8 is welded and fixed to the detector body 1, a lifting rod 9 is provided on the internal sliding limit of the fixing rod 8, and the lifting rod 9 extends to the outside of the fixing rod 8, a fixing seat 10 is fixedly installed on the upper end of the lifting rod 9, a clamping plate 11 is installed on the upper end of the fixing seat 10, and the clamping plate 11 is connected to the fixing seat 10 through a rotating shaft.

[0024] During use, the staff puts the workpiece to be inspected into the first sealing box 2, and as the hydraulic lifting device 5 descends, the second sealing box 3 closes the first sealing box 2. At this time, the second motor 17 is turned on, and its output shaft drives the clamping plate 11 to rotate one hundred and eighty degrees to ensure that it is located above the second sealing box 3. Then the first motor 15 is turned on, and its output shaft drives the screw 16 to rotate. Under the friction between its external thread and the inner screw hole of the lifting rod 9, the lifting rod 9 drives the clamping plate 11 to move continuously downward until it contacts the upper end face of the second sealing box 3 and is clamped and fixed.

[0025] See also Figure 1 and Figure 2A first motor 15 is fixedly installed at the lower end of the fixed rod 8, and a screw 16 is installed on the output shaft of the first motor 15. The screw 16 extends to the inside of the lifting rod 9, and the internal screw hole of the lifting rod 9 is adapted to the external thread of the screw 16. A second motor 17 is installed inside the fixed seat 10, and the output shaft of the second motor 17 is fixed to the rotating shaft of the clamping plate 11 through a coupling. The sealing box clamping mechanism can cooperate with the hydraulic lifting device 5 to clamp and fix the sealing box, thereby eliminating the gap between the first sealing box 2 and the second sealing box 3 to the greatest extent, thereby avoiding air leakage during the detection process.

[0026] See also Figure 3 A rubber block 18 is provided on the upper end surface of the first sealing box 2, and a groove body recessed inward is provided on the surface of the rubber block 18, and the rubber block 18 is adhered and fixed to the first sealing box 2. A sealing protrusion 19 is provided on the lower end of the second sealing box 3, and the sealing protrusion 19 is engaged with the rubber block 18, so as to realize the sealing between the first sealing box 2 and the second sealing box 3, and effectively avoid air leakage during the airtightness detection.

[0027] See also Figure 1 A pressure sensor is installed in the cavity formed by the closed first sealing box 2 and the second sealing box 3. An air injection pipe 13 is provided on one side of the first sealing box 2, and the other end of the air injection pipe 13 is connected to the air pump inside the detector body 1. An electromagnetic valve 14 is installed in the middle position of the air injection pipe 13 to realize pre-detection of the sealed cavity.

[0028] See also Figure 1 An indicator light 12 is provided on one side of the front fixing rod 8. There are two indicator lights 12, and the indicator lights 12 are fixed to the detector body 1 by screws. A green light indicates that subsequent detection work can be carried out, and a red light indicates that there is a leak in the detector body 1 and timely maintenance is required.

[0029] See also Figure 1 Guide rods 6 are installed on both sides between the top plate 4 and the detector body 1, and the guide rods 6 are rotatably connected to the top plate 4 and the detector body 1 respectively. A guide slider 7 is slidably installed on the outside of the guide rods 6, and the inner side of the guide slider 7 is fixed to the second sealing box 3, thereby improving the stability of the vertical movement of the second sealing box 3, thereby providing a prerequisite for accurate engagement.

[0030] See also Figure 1 A hydraulic lifting device 5 is installed at the middle position of the bottom of the top plate 4, and the movable end of the hydraulic lifting device 5 is fixed to the second sealing box 3 by bolts.

[0031] Working principle: When the first sealing box 2 and the second sealing box 3 are in contact, the sealing protrusion 19 can enter into the groove of the rubber block 18, and the elastic structure can increase the tightness of the contact between the two, thereby achieving sealing between each other. Before placing the workpiece to be tested, high-pressure air is injected into the sealing box through the air pump inside the detector body 1, and then the sealing chamber is pressurized by closing the solenoid valve 14. Within the set time, if the air pressure inside the sealing chamber is maintained at the set value, the indicator light 12 shows green, and the staff can carry out subsequent detection work. If the air pressure inside the sealing chamber decreases, it means that the sealing box is leaking. At this time, the indicator light 12 shows red, and the staff should stop the detection and repair the detector to avoid a decrease in the accuracy of subsequent detection.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An airtightness detector for preventing air leakage, comprising a detector body (1), characterized in that: A first sealing box (2) is installed on the upper end surface of the detector body (1), and the first sealing box (2) is fixed to the detector body (1) by welding; a second sealing box (3) is arranged above the first sealing box (2), and the second sealing box (3) is snap-connected with the first sealing box (2); a top plate (4) is arranged above the second sealing box (3); fixed rods (8) are installed at the front and rear of the upper end surface of the detector body (1), and the base of the fixed rod (8) is fixed to the detector body (1); a lifting rod (9) is provided inside the fixed rod (8) for sliding stop, and the lifting rod (9) extends to the outside of the fixed rod (8); a fixed seat (10) is fixedly installed on the upper end of the lifting rod (9); a clamping plate (11) is installed on the upper end of the fixed seat (10), and the clamping plate (11) is connected to the fixed seat (10) through a rotating shaft.

2. The airtightness detector for preventing air leakage according to claim 1, characterized in that: A first motor (15) is fixedly mounted at the lower end of the interior of the fixing rod (8); a screw (16) is mounted on the output shaft of the first motor (15); the screw (16) extends into the interior of the lifting rod (9); and the internal screw hole of the lifting rod (9) is matched with the external thread of the screw (16); a second motor (17) is mounted inside the fixing seat (10); and the output shaft of the second motor (17) is fixed to the rotating shaft of the clamping plate (11) via a coupling.

3. The airtightness detector for preventing air leakage according to claim 1, characterized in that: The upper end surface of the first sealing box (2) is provided with a rubber clamping block (18), the surface of the rubber clamping block (18) is provided with a groove body which is recessed inwards, and the rubber clamping block (18) is bonded and fixed to the first sealing box (2), and the lower end of the second sealing box (3) is provided with a sealing protrusion (19), and the sealing protrusion (19) is engaged with the rubber clamping block (18).

4. The airtightness detector for preventing air leakage according to claim 1, characterized in that: A pressure sensor is installed in a cavity formed by the closed connection of the first sealing box (2) and the second sealing box (3); an air injection pipe (13) is provided on one side of the first sealing box (2); the other end of the air injection pipe (13) is connected to an air pump inside the detector body (1); and an electromagnetic valve (14) is installed in the middle of the air injection pipe (13).

5. The airtightness detector for preventing air leakage according to claim 4, characterized in that: An indicator light (12) is provided on one side of the front fixing rod (8), two indicator lights (12) are provided, and the indicator lights (12) are fixed to the detector body (1) by screws.

6. The airtightness detector for preventing air leakage according to claim 1, characterized in that: Guide rods (6) are installed on both sides between the top plate (4) and the detector body (1), and the guide rods (6) are rotatably connected to the top plate (4) and the detector body (1) respectively. A guide slider (7) is slidably installed on the outside of the guide rods (6), and the inner side of the guide slider (7) is fixed to the second sealing box (3).

7. The airtightness detector for preventing air leakage according to claim 6, characterized in that: A hydraulic lifting device (5) is installed at the middle position of the bottom of the top plate (4), and the movable end of the hydraulic lifting device (5) is fixed to the second sealing box (3) by means of bolts.

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