Test chamber for air tightness test and tester

Abstract

The utility model relates to a test chamber and a tester for air tightness test, which comprise a base, a groove is arranged on the top surface of the base, and a plurality of box bodies for placing samples to be tested are detachably arranged in the groove at intervals; the base is provided with a top cover capable of movably covering the opening end of the groove in a sealing mode. The surface, corresponding to the groove, of the top cover is provided with sealing plugs which are in one-to-one corresponding sealing connection with the box body at the opening of the box body; gas pressure sensors are arranged in the groove and each sealing plug; an inflating mechanism capable of inflating air into the box body is arranged on the top cover and / or between the base and the box body; meanwhile, the utility model discloses a tester adopting the test chamber. According to different test samples, the test samples can be placed in the groove or the box body to be tested, different use requirements are met, and the test box is more convenient to use.

Description

Technical Field

[0001] The utility model relates to the field of airtight testing machines, in particular to a testing chamber and a testing instrument for airtight testing. Background Art

[0002] The airtightness test machine, also known as the airtightness detection test machine, is a device widely used in airtightness tests of various seals. It is mainly composed of a closed test chamber, an air source, a pressure sensor and a data processing system. It can be used for production batch testing, as well as for sampling or laboratory use. In the production process of audio equipment, sealing is an important quality standard. Speakers, power amplifiers or speakers should have a certain airtightness to ensure the working effect and sound quality of the audio equipment; after long-term use of audio equipment, the airtightness may be reduced due to aging and damage of the internal seals. Airtightness testing can check and diagnose the equipment, find the specific cause, and facilitate immediate maintenance and replacement. For example, the headphones and Bluetooth speakers we use in daily life are of different sizes and shapes. In the existing airtightness test machines, the test chambers are fixedly installed, and their shapes and sizes are also fixed. They can only be used for audio equipment that matches them. After replacing the audio equipment, they cannot be used, and a new airtightness test machine needs to be replaced, which is extremely inconvenient to use. Utility Model Content

[0003] In view of the existing deficiencies, the utility model provides a test chamber and a tester for air tightness testing.

[0004] The utility model solves the technical problem by adopting the following technical solution: a test chamber for air tightness test, comprising a base, wherein the top surface of the base is provided with a groove, and a plurality of boxes with open tops for placing samples to be tested are detachably installed at intervals in the groove; a top cover with a movable sealing cover arranged at the open end of the groove is provided on the base; a sealing plug which is sealed and connected to the box body at the open end of the box body in a one-to-one correspondence is provided on the surface of the top cover corresponding to the groove; a gas pressure sensor is provided in the groove and on each sealing plug; an inflation mechanism capable of inflating air into the box body is provided on the top cover and / or between the base and the box body.

[0005] Preferably, a plurality of slots are provided at the bottom of the groove, and the box body is matched and engaged in the slots.

[0006] Preferably, a sealing ring is provided on the side wall of the top cover and surrounds the top cover.

[0007] Preferably, the inflation mechanism includes a main inflation tube arranged on the top cover, a plurality of branch inflation tubes arranged on each sealing plug and respectively connected to the main inflation tube, and a solenoid valve arranged on each branch inflation tube.

[0008] Preferably, the inflation mechanism includes a main inflation pipe arranged on the base, a plurality of branch inflation pipes respectively connected to the main inflation pipe, a solenoid valve arranged on each branch inflation pipe, and a plurality of quick connectors for air arranged between the groove and the box body and connected to the branch inflation pipes one by one.

[0009] Preferably, the male heads of the quick connectors are arranged in parallel and spaced apart at the bottom of the groove, and the female heads of the quick connectors are correspondingly arranged at the bottom of each box.

[0010] Preferably, each of the boxes is provided with a sample table for matching and placing the sample to be tested.

[0011] An air tightness tester comprises a test chamber for air tightness testing as described in any one of the above items.

[0012] The beneficial effect of the utility model is that the test chamber of the utility model changes the size of the test chamber by placing the number of boxes in the groove, and adapts to audio equipment of different shapes by placing different boxes, and each box can be independently controlled. If no box is placed in the groove, it can be applied to audio equipment of larger volume. If a box is placed in the groove, multiple identical or different audio equipment can be tested at the same time, which is convenient to use and can also improve the test efficiency; at the same time, the box can be disassembled in the groove, and the box can be replaced very conveniently to meet the test requirements of different audio equipment. The simple and convenient replacement can effectively improve the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0014] Figure 2 It is a structural schematic diagram of the second embodiment of the utility model;

[0015] Names and serial numbers of parts in the figure: 1-base 10-groove 11-card slot 2-box 20-sample table 3-top cover 30-sealing plug 31-sealing ring 4-gas pressure sensor 5-inflating mechanism 50-main inflating pipe 51-branch inflating pipe 52-solenoid valve 53-quick connector 6-air tightness tester body. DETAILED DESCRIPTION

[0016] In order to more clearly illustrate the purpose, technical solutions and advantages of the embodiments of the utility model, the utility model will be further described in conjunction with the accompanying drawings and embodiments below, and a clear and complete description will be given. Obviously, the described embodiments are partial embodiments of the utility model, rather than all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model. In addition, the directional terms mentioned in the utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", etc., are only referenced to the directions of the attached diagrams. The directional terms used are for better and clearer explanation and understanding of the utility model, rather than indicating or implying the orientation that the utility model must have, and therefore cannot be understood as a limitation on the utility model.

[0017] The utility model is implemented as follows Figure 1 to Figure 2As shown in the figure, a test chamber for air tightness test includes a base 1, which is used to be installed on a frame or base of an air tightness test mechanism. The air tightness test mechanism is any existing test mechanism, such as a test mechanism mainly composed of a frame, a test chamber, a driving member and an air tightness detector body; the base 1 is used to be fixedly installed on the frame; the driving member is used to drive the top cover to cover or open on the groove 10, and the driving member includes a driving cylinder and a connecting rod driven by the driving cylinder and connected to the top cover; the air tightness detector body 6 is also installed on the frame and connected to the inflation mechanism 5, and a control panel and a PLC controller electrically connected to each other are also provided on the frame, and the control surface A switch is provided on the board, and the gas pressure sensor 4 and the solenoid valve 52 of the test chamber are electrically connected to the PLC controller through a wire. The PLC controller controls the signal transmission between each gas pressure sensor 4 and the air tightness detector body 6 and the opening or closing of each solenoid valve 52; a groove 10 is provided on the top surface of the base 1, and a plurality of boxes 2 with open tops for placing samples to be tested are installed in the groove 10 in a detachable manner at intervals. The groove 10 is divided into different spaces by the box 2, and one box 2 corresponds to a placement space for a sample to be tested, one box 2 corresponds to one sample to be tested, and different boxes 2 correspond to different types of samples to be tested. In this way, several identical boxes are placed in the groove 10. 2, it means that the same samples to be tested can be tested in batches, such as the same headphones or Bluetooth speakers can be tested in batches at the same time. When several different boxes 2 are placed in the groove 10, it means that different samples can be tested at the same time, which is more convenient to use and more efficient. The box 2 is detachably installed in the groove 10, which is convenient for replacing the box 2 and can easily switch between different samples to be tested. For the detachable installation structure of the box 2 in the groove 10, a plurality of card slots 11 are provided at the bottom of the groove 10, and the box 2 is matched and snapped into the card slots 11. The card slots 11 are formed by the indentation of the bottom of the groove 10 or extend from the bottom of the groove 10. The top cover 3 is fixedly connected to the connecting rod of the airtightness testing mechanism, and the connecting rod is driven downward by the driving cylinder to drive the top cover 3 to move downward so that the top cover 3 covers the opening end of the groove 10 to seal the groove 10. When it needs to be opened, the driving cylinder drives the connecting rod to move upward, and the connecting rod drives the top cover 3 to move upward; the sealing of the top cover 3 at the opening end of the groove 10 is that a sealing ring 31 is arranged around the top cover on the side wall of the top cover 3, and when the top cover 3 is inserted into the opening end of the groove 10, the sealing ring 31 is arranged on the outer side wall of the top cover 3;A sealing plug 30 is provided on the surface of the top cover 3 corresponding to the groove 10 and is sealed and connected to the box body 2 at the open part of the box body 2 in a one-to-one manner. The surface of the top cover 3 corresponding to the groove 10 is the bottom surface of the top cover 3. The sealing plug 30 is sealed and connected to the open part of the box body 2 to seal the inside of the box body 2. The sealing plugs 30 are arranged at intervals on the bottom surface of the top cover 3. There is a gap between two adjacent sealing plugs 30 to facilitate the sealing connection between the sealing plug 30 and the box body 2. The sealing plug 30 can be a rubber plug or a plug with a sealing ring. At this time, multiple boxes 2 are set into boxes of the same specifications, and then a sample table 20 for matching and placing the sample to be tested is provided in each box body 2. The sample table 20 is arranged according to the shape of the sample to be tested. The sample table 20 is a platform arranged on the bottom surface of the box body 2, and a platform groove for placing the sample to be tested is arranged on the platform; in this way, several boxes 2 with different sample tables 20 arranged inside can be arranged according to different samples to be tested; when a certain product needs to be tested, the corresponding box body 2 can be placed in the groove 10 of the base 1. For the detection of different products, it is only necessary to replace the corresponding box body 2, which is more convenient to use; a gas pressure sensor 4 is arranged in the groove 10 and on each sealing plug 30, and the gas pressure sensor 4 senses the pressure in the space where it is located and transmits the corresponding information to the airtightness tester body 6, that is, a gas pressure sensor 4 is arranged in the groove 10, and in each A gas pressure sensor 4 is respectively arranged on the sealing plug 30, and the use of the gas pressure sensor 4 will not be affected when the box body 2 is replaced; in this way, when the box body 2 is not placed in the groove 10, the sealed space formed by the groove 10 and the top cover 3 can be used to test a product of a larger volume, and the gas pressure sensor 4 in the groove 10 works, while the gas pressure sensor 4 on the sealing plug 30 does not work; after the box body 2 is placed in the groove 10 and the groove 10 is filled, the gas pressure sensor 4 in the groove 10 does not work, while the gas pressure sensor 4 on the sealing plug 30 works; when the box body 2 is placed in the groove 10 but the groove 10 is not filled, and there is no sample to be tested in the groove 10, then only the sealing plug 30 works. The gas pressure sensor 4 on the sealing plug 30 is functional, and the sample to be tested is also placed in the groove 10, so the gas pressure sensor 4 on the sealing plug 30 sealed with the box body 2 and the gas pressure sensor 4 in the groove 10 are both functional, which is more convenient to use and can meet different test requirements; an inflatable mechanism 5 capable of inflating the box body 2 is arranged on the top cover 3 and / or between the base 1 and the box body 2, that is, an inflatable mechanism 5 for inflating the box body 2 is arranged on the top cover 3, or an inflatable mechanism 5 for inflating the box body 2 is arranged on the base 1, or an inflatable mechanism 5 for inflating the box body 2 is arranged on the top cover 3 and the base 1, respectively, and the inflatable mechanism 5 is connected to the airtightness detector body 6 to inflate the box body 2. ;

[0018] Further improvement, for the setting of the inflation mechanism 5, one situation is that, Figure 1 As shown in , the inflation mechanism 5 includes a main inflation tube 50 arranged on the top cover 3, a plurality of branch inflation tubes 51 arranged on each sealing plug 30 and respectively connected to the main inflation tube 50, and a solenoid valve 52 arranged on each branch inflation tube 51. The main inflation tube 50 is used to connect with the air tightness detector body 6. The air tightness detector body 6 is inflated to the main inflation tube 50, and then flows to the branch inflation tube 51 through the main inflation tube 50. If the solenoid valve 52 on the branch inflation tube 51 is opened on the branch inflation tube 51, the gas will flow into the box body 2. If the solenoid valve 52 is closed, the gas will not flow into the corresponding box body 2, and the flow of gas in each box body 2 during detection can be conveniently controlled. In this case, the replacement of the box body 2 will not affect the function of the inflation mechanism 5, and there is no need to set a structure for inflation on the box body 2. The structure of the box body 2 is simpler and more convenient to use. Another situation is that Figure 2 As shown in , the inflation mechanism 5 includes a main inflation pipe 50 arranged on the base 1, a plurality of branch inflation pipes 51 respectively connected to the main inflation pipe 50, a solenoid valve 52 arranged on each branch inflation pipe 51, and a plurality of quick connectors 53 for air arranged between the groove 10 and the box body 2 and connected to the branch inflation pipes 51 one by one. The difference from the previous case is that the main inflation pipe 50, the branch inflation pipes 51 and the solenoid valves 52 are all arranged on the base 1, and then a quick connector 53 is arranged between the groove 10 and each box body 2, and only a gas pressure sensor 4 is arranged on the sealing plug 30. When the box body 2 is placed in the groove 10, the interior of the box body 2 is connected to the inflation mechanism 5 through the quick connector 53 therebetween, so as to inflate the box body 2. At this time, in order to facilitate the connection of the quick connector 53 between the box body 2 when the box body 2 is placed in the groove 10, the male heads of the quick connector 53 are arranged in parallel at intervals at the bottom of the groove 10, and the female heads of the quick connector 53 are correspondingly arranged at the bottom of each box body 2, that is, the male head of the quick connector 53 is arranged in the groove 10, and multiple male heads are arranged in a row at intervals, and the female head of the quick connector 53 is arranged on the box body 2. When the box body 2 is placed in the groove 10, the male head at the bottom of the groove 10 is inserted into the female head at the bottom of the box body 2 to realize the connection, which is convenient, fast, simple and practical.

[0019] An air tightness tester includes a test chamber for an air tightness tester as described in any of the above items. The aforementioned test chamber is used to replace the test chamber in an existing air tightness testing mechanism, so that different types of products can be tested in the same testing mechanism. During testing, only the box body needs to be replaced, which is easy to replace and more convenient to use.

[0020] Although the utility model has been described in detail above with general descriptions and specific implementation schemes, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A test chamber for air tightness testing, characterized in that: The invention comprises a base, wherein the top surface of the base is provided with a groove, and a plurality of boxes with open tops for placing samples to be tested are detachably installed at intervals in the groove; a top cover with a movable sealing cover arranged at the open end of the groove is provided on the base; a sealing plug which is sealed and connected to the box body at the open end of the box body is provided on the surface of the top cover corresponding to the groove; a gas pressure sensor is provided in the groove and on each sealing plug; an inflation mechanism which can inflate the box body is provided on the top cover and / or between the base and the box body.

2. The test chamber for air tightness testing according to claim 1, characterized in that The bottom of the groove is provided with a plurality of card slots, and the box body is matched and engaged in the card slots.

3. The test chamber for air tightness testing according to claim 1, characterized in that A sealing ring is arranged on the side wall of the top cover and surrounds the top cover.

4. The test chamber for air tightness testing according to claim 1, characterized in that The inflation mechanism includes a main inflation tube arranged on the top cover, a plurality of branch inflation tubes arranged on each sealing plug and respectively connected to the main inflation tube, and a solenoid valve arranged on each branch inflation tube.

5. The test chamber for air tightness testing according to claim 1, characterized in that The inflation mechanism includes a main inflation pipe arranged on the base, a plurality of branch inflation pipes respectively connected to the main inflation pipe, a solenoid valve arranged on each branch inflation pipe, and a plurality of quick joints for air arranged between the groove and the box body and connected to the branch inflation pipes one by one.

6. The test chamber for airtightness testing according to claim 5, characterized in that The male heads of the quick connector are arranged in parallel at intervals at the bottom of the groove, and the female heads of the quick connector are correspondingly arranged at the bottom of each box.

7. The test chamber for air tightness testing according to claim 1, characterized in that Each of the boxes is provided with a sample table for matching and placing the sample to be tested.

8. An air tightness tester, characterized in that : comprising a test chamber for air tightness testing as described in any one of claims 1 to 7.

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