Air tightness detection device

Abstract

The utility model relates to an air tightness detection device which comprises a sealing box, a conveying pump, a gas tank and a locking module, wherein the right end of the sealing box is provided with a mounting hole, the left end of the sealing box is provided with a straight hole, the inner top end of the sealing box is provided with a groove, one end of the conveying pump is communicated with the gas tank, and the conveying pump is used for conveying tracer gas and increasing gas pressure in the sealing box. The locking module is fixedly installed at the inner top end of the sealing box and used for fixing a module to be installed, the pressure sensor is fixedly installed at the inner bottom end of the sealing box, the control system is electrically connected with the pressure sensor, and the control system is used for collecting and processing data and judging a detection result. A to-be-tested motor cover is fixedly installed at the top end of the second circular ring through a screw rod, the service life of the device can be prolonged by replacing the first circular ring and the second circular ring, tracer gas is conveyed into the sealing box through the conveying pump, the change of air pressure is measured through the pressure sensor, and the sealing performance of the motor cover is tested.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, and in particular to an airtightness testing device. Background Technology

[0002] In various mechanical manufacturing fields, especially in the production of critical components requiring internal sealing, such as motors, pumps, and compressors, the airtightness of their outer casings or end caps (such as motor covers) is a crucial performance indicator. Good sealing performance can effectively prevent internal lubricant leakage, external dust or moisture intrusion, and the escape of working media (such as refrigerant), thereby ensuring long-term stable operation of equipment, improving energy efficiency, and extending service life. Traditional locking structures are often highly integrated with the main structure (such as the sealing box) or extremely inconvenient to replace, leading users to need to replace the entire expensive locking module or even major components, resulting in high maintenance costs. Utility Model Content

[0003] The purpose of this invention is to provide an airtightness testing device to solve the problems existing in the prior art.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] An airtightness testing device, comprising:

[0006] A sealing box, wherein the right end of the sealing box has an installation hole, the left end of the sealing box has a straight hole, and the inner top end of the sealing box has a groove.

[0007] A delivery pump, one end of which is connected to a gas tank, is used to deliver tracer gas and increase the gas pressure inside the sealed box;

[0008] A locking module is fixedly installed at the inner top of the sealing box, and the locking module is used to fix the module to be installed on the side.

[0009] A pressure sensor is fixedly installed at the bottom of the sealed box, and the pressure sensor is used to detect the pressure inside the sealed box.

[0010] The system is electrically connected to the pressure sensor and is used to acquire and process data and determine the detection results.

[0011] By adopting the above technical solution, the motor cover under test is fixedly installed on the top of the second ring with screws. The service life of the device can be improved by replacing the first and second rings without replacing the entire device. The tracer gas is delivered into the sealing box by a delivery pump, and the change in gas pressure is measured by a pressure sensor to test the sealing performance of the motor cover.

[0012] In a further embodiment, a valve is fixedly installed in the straight hole of the sealing box. The valve includes a rotating shaft and a disc. One end of the rotating shaft is fixedly installed at the rear end of the straight hole, and the other end of the rotating shaft is fixedly installed at the front end of the straight hole. The disc is rotatably installed on the rotating shaft. The valve is used to control the opening and closing of the straight hole.

[0013] In a further embodiment, the locking module includes:

[0014] A disc spring, one end of which is fixedly installed at the inner end of the sealed box;

[0015] The first ring is inserted through the top inner part of the sealed box. The other end of the disc spring is fixedly installed at the bottom of the first ring. The first ring is inserted through the top inner part of the sealed box. The top of the first ring has a through-hole.

[0016] The second ring has its bottom end fixedly installed at the bottom of the groove of the sealing box, and its top end has a threaded hole that runs through the top and bottom. The center lines of the clearance hole and the threaded hole are on the same straight line.

[0017] and a screw, which is screwed into the threaded hole of the second ring.

[0018] In a further embodiment, a detector is also included, which is electrically connected to the control system and is used to detect tracer gas.

[0019] In a further embodiment, the control system includes a display screen, a circuit board, and a housing. The circuit board is electrically connected to the display screen and a pressure sensor. The display screen is used to display detected data, and the housing is used to protect the circuit board.

[0020] In a further embodiment, a first sealing ring is provided at the top end of the first ring, and a second sealing ring is provided at the bottom end of the second ring.

[0021] By adopting the above technical solution, the motor cover to be tested is fixedly installed on the top of the second ring by a screw. The second ring and the first ring are sealed together by a sealing ring to ensure the sealing between the first ring and the second ring. The delivery pump delivers tracer gas into the sealed box. If the motor cover is not sealed well, the pressure sensor in the sealed box will detect the decrease in gas pressure inside the sealed box, and the detector can detect the tracer gas leaking around. If the motor cover is sealed well, the gas pressure sensor will detect that the gas pressure inside the sealed box remains unchanged.

[0022] In summary, this utility model has the following beneficial effects:

[0023] 1. The motor cover to be tested is fixed on the top of the second ring by screws. The second ring and the first ring are sealed together by a sealing ring to ensure the sealing between the first ring and the second ring. The delivery pump delivers tracer gas into the sealed box. If the motor cover is not sealed well, the pressure sensor in the sealed box will detect the decrease in gas pressure in the sealed box, and the detector can detect the tracer gas leaking around. If the motor cover is sealed well, the pressure sensor will detect the gas pressure in the sealed box remains unchanged. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a practical structural diagram of the sealing box of this utility model;

[0026] In the diagram, 1. Sealing box; 2. Delivery pump; 3. Locking module; 31. Disc spring; 32. First ring; 33. Second ring; 34. Screw; 4. Pressure sensor; 5. Control system. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0029] Example 1:

[0030] like Figures 1-2As shown, an airtightness detection device includes a sealed box 1, with a mounting hole at the right end and a straight hole at the left end, and a groove at the inner top of the sealed box 1; a delivery pump 2, one end of which is connected to a gas tank, for delivering tracer gas to increase the air pressure inside the sealed box 1; a locking module 3, which is fixedly installed at the inner top of the sealed box 1 and is used to fix the mounting module to be installed; a pressure sensor 4, which is fixedly installed at the inner bottom of the sealed box 1 and is used to detect the pressure inside the sealed box 1; and a control system 5, which is electrically connected to the pressure sensor 4 and is used to collect and process data and determine the detection results.

[0031] A valve is fixedly installed in the straight hole of the sealing box 1. The valve includes a rotating shaft and a disc. One end of the rotating shaft is fixedly installed at the rear end of the straight hole, and the other end of the rotating shaft is fixedly installed at the front end of the straight hole. The disc is rotatably installed on the rotating shaft. The valve is used to control the opening and closing of the straight hole.

[0032] The locking module 3 includes a disc spring 31, one end of which is fixedly installed in the inner end of the sealing box 1; a first ring 32, which passes through the inner top of the sealing box 1; the other end of the disc spring 31 is fixedly installed in the bottom of the first ring 32; the first ring 32 passes through the inner top of the sealing box 1; a clearance hole is provided at the top of the first ring 32; a second ring 33, the bottom end of which is fixedly installed in the bottom of the groove of the sealing box 1; a threaded hole is provided at the top of the second ring 33; the center lines of the clearance hole and the threaded hole are on the same straight line; and a screw 34, which is screwed into the threaded hole of the second ring 33.

[0033] It also includes a detector, which is electrically connected to the control system 5. The detector is used to detect tracer gas. The control system 5 includes a display screen, a circuit board, and a housing. The circuit board is electrically connected to the display screen and the pressure sensor 4. The display screen is used to display the detected data. The housing is used to protect the circuit board. A first sealing ring is provided at the top of the first ring 32, and a second sealing ring is provided at the bottom of the second ring 33.

[0034] Specific implementation process: The motor cover to be tested is fixedly installed on the top of the second ring 33 by screws. The second ring 33 and the first ring 32 are sealed by a sealing ring to ensure the sealing between the first ring 32 and the second ring 33. The delivery pump 2 delivers tracer gas into the sealed box 1. If the motor cover is not sealed well, the pressure sensor 4 in the sealed box 1 will detect the decrease in gas pressure in the sealed box 1, and the detector can detect the tracer gas leaking around. If the motor cover is sealed well, the gas pressure in the sealed box 1 will remain unchanged.

[0035] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0036] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An airtightness testing device, characterized in that... ,include: A sealing box (1) has an installation hole at its right end, a straight hole at its left end, and a groove at its inner top end. A delivery pump (2) is connected to a gas tank at one end. The delivery pump (2) is used to deliver tracer gas and increase the gas pressure inside the sealed box (1). Locking module (3), the locking module (3) is fixedly installed on the inner top of the sealing box (1), the locking module (3) is used to fix the module to be installed on the side; Pressure sensor (4), the pressure sensor (4) is fixedly installed at the bottom of the sealed box (1), the pressure sensor (4) is used to detect the pressure inside the sealed box (1); The control system (5) is electrically connected to the pressure sensor (4) and is used to collect and process data and determine the detection results.

2. The airtightness testing device according to claim 1, characterized in that: A valve is fixedly installed in the straight hole of the sealing box (1). The valve includes a rotating shaft and a disc. One end of the rotating shaft is fixedly installed at the rear end of the straight hole, and the other end of the rotating shaft is fixedly installed at the front end of the straight hole. The disc is rotatably installed on the rotating shaft. The valve is used to control the opening and closing of the straight hole.

3. The airtightness testing device according to claim 1, characterized in that: The locking module (3) includes: A disc spring (31), one end of which is fixedly installed in the inner end of the sealed box (1); The first ring (32) is inserted through the top inner end of the sealing box (1). The other end of the disc spring (31) is fixedly installed at the bottom of the first ring (32). The first ring (32) is inserted through the top inner end of the sealing box (1). The top end of the first ring (32) is provided with a through-hole. The second ring (33) is fixedly installed at the bottom of the groove of the sealing box (1) at its bottom end. The top end of the second ring (33) is provided with a threaded hole that runs through the top and bottom. The center lines of the clearance hole and the threaded hole are on the same straight line. and a screw (34), which is screwed into the threaded hole of the second ring (33).

4. The airtightness testing device according to claim 1, characterized in that: It also includes a detector, which is electrically connected to the control system (5), and the detector is used to detect tracer gas.

5. The airtightness testing device according to claim 1, characterized in that: The control system (5) includes a display screen, a circuit board, and a housing. The circuit board is electrically connected to the display screen and the pressure sensor (4). The display screen is used to display the detected data, and the housing is used to protect the circuit board.

6. The airtightness testing device according to claim 3, characterized in that: The first ring (32) has a first sealing ring at its top end, and the second ring (33) has a second sealing ring at its bottom end.

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