Testing device for detecting performance of gas detector

Abstract

The utility model discloses a test device for detecting the performance of a gas detector, which comprises a test box, a plurality of terminal strips are mounted on the rear side wall of the test box in a sliding manner, sealing rings are arranged between the terminal strips and the side wall of the test box, a gas inlet pipe is mounted on the left side wall of the test box, and a gas outlet pipe is mounted on the right side wall of the test box. And a pressure regulating valve and a flow valve are arranged on the air inlet pipe. According to the device, the problems of poor sealing performance and poor compatibility are solved by arranging the height-adjustable terminal strip on the test box, and the problems of inaccurate flow and gas leakage are solved by arranging the pressure regulating valve and the flow valve.

Description

Technical Field

[0001] This utility model relates to the field of gas detector testing equipment, and specifically to a test device for testing the performance of gas detectors. Background Technology

[0002] Current gas detector testing setups involve drilling a hole in the top of the test chamber, inserting a power strip, and directly plugging the gas detector's interface into the power strip. This method suffers from two drawbacks: poor sealing and inconvenient operation. Furthermore, due to space limitations at the detector interface, only one detector can be tested at a time. The test chamber's gas injection system uses a pressure reducing valve and an injection device; if the electronic components are substandard or the programming is poorly written, inaccurate gas supply or flow rate can easily occur. After the test, improper shutdown can lead to gas leakage if not properly controlled. Utility Model Content

[0003] To address the aforementioned problems, this utility model discloses a testing device for detecting the performance of gas detectors. This device solves the problems of poor sealing and poor compatibility by setting a height-adjustable terminal block on the test chamber, and solves the problems of inaccurate flow and gas leakage by setting a pressure regulating valve and a flow valve.

[0004] A test apparatus for testing the performance of a gas detector includes a test chamber. Multiple terminal blocks are slidably mounted on the rear side wall of the test chamber. A sealing ring is provided between the terminal blocks and the side wall of the test chamber. An air inlet pipe is installed on the left side wall of the test chamber, and an air outlet pipe is installed on the right side wall of the test chamber. A pressure regulating valve and a flow valve are provided on the air inlet pipe.

[0005] Furthermore, the terminal is connected to a power source outside the test chamber via a lead wire, which is fitted inside a sleeve, and the sleeve is slidably connected to the rear side wall of the test chamber.

[0006] Furthermore, the portion of the sleeve located outside the test chamber has a flange at its end, and a spring is provided between the flange and the outer wall of the test chamber. The portion of the sleeve located inside the test chamber has an expansion portion, which is slidably connected to the inner wall of the test chamber.

[0007] Furthermore, the rear wall of the test chamber is provided with a vertical sliding groove, and the sleeve is slidably installed in the sliding groove. Elastic sealing gaskets are installed in the sliding grooves above and below the sleeve.

[0008] Furthermore, the inner and outer walls of the test chamber are provided with guide grooves on both sides of the slide groove, and an inner guide plate is configured in the inner guide groove, which is in contact with and connected to the expansion part.

[0009] Furthermore, an outer guide plate is provided in the outer guide groove, the outer guide plate abuts against the spring, and a ball bearing is provided between the outer guide groove and the outer guide plate.

[0010] Furthermore, the multiple terminal blocks are arranged horizontally in sequence on the rear side wall of the test chamber.

[0011] The beneficial effects of this utility model are:

[0012] This invention solves the problems of poor sealing and compatibility by setting height-adjustable terminal blocks on the test chamber. By adjusting the installation height of the terminal blocks on the slide groove, multiple detectors can be staggered, allowing for simultaneous testing of multiple terminal blocks. Furthermore, the inclusion of pressure regulating valves and flow valves solves the problems of inaccurate flow and gas leakage, resulting in more precise internal control, simpler manual flow adjustment, stability, convenience, and improved safety. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This utility model has a three-dimensional structure. Figure 1 ;

[0015] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0016] Figure 3 For the purpose of this utility model's three-dimensional structural diagram;

[0017] Figure 4 for Figure 3 A magnified view of a portion of the image;

[0018] Figure 5 This is a planar structural diagram of the present invention;

[0019] Figure 6 for Figure 5 AA section view in the middle;

[0020] Figure 7 This is a diagram showing the structural relationship between the sliding groove and the elastic sealing gasket.

[0021] In the diagram: 1. Inlet pipe, 2. Pressure regulating valve, 3. Flow valve, 4. Test chamber, 5. Terminal block, 6. Outlet pipe, 7. Sleeve, 8. Inner guide plate, 9. Outer guide plate, 10. Inner guide groove, 11. Slide groove, 12. Lead wire, 13. Spring, 14. Elastic sealing gasket, 15. Contraction spring wire, 16. Outer guide groove, 17. Sealing ring. Detailed Implementation

[0022] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] like Figure 1-7 As shown, this utility model discloses a test device for testing the performance of gas detectors, including a test chamber 4. Multiple vertically oriented grooves 11 are formed on the rear sidewall of the test chamber, penetrating the rear sidewall and forming a transparent structure. Guide grooves are symmetrically formed on both sides of each groove; these guide grooves are blind grooves and do not penetrate the rear sidewall of the test chamber 4. The guide groove located inside the rear sidewall of the test chamber 4 is the inner guide groove 10, and the one located outside the rear sidewall of the test chamber 4 is the outer guide groove 16. Multiple sleeves 7 are slidably installed in each groove, with a lead wire 12 fitted inside each sleeve. A terminal block 5 is installed at the end of the lead wire inside the test chamber, connecting to the gas detector via the terminal block, allowing multiple detectors to be tested simultaneously inside the test chamber. A sealing ring 7 is provided between the lead wire 12 and the end of the sleeve 7. The sleeve 7 is an elastic structure; the seal between the sleeve 7 and the groove 11 is achieved through deformation between the sleeve 7 and the groove 11.

[0024] To accommodate the detector's structure and terminal block installations at different heights, the sleeve 7 is designed to slide up and down along the groove 11. Specifically, the inner guide groove 10 is slidably connected to the inner guide plate 8, and the outer guide groove 16 is slidably connected to the outer guide plate 9 via ball bearings. Two springs 13 are symmetrically connected to the outer guide plate about the sleeve. The outer ends of the springs abut against a flange with a central through-hole. The lead wire passes through this through-hole, and the center of the flange near the spring is welded to the sleeve 7. Both the inner and outer guide plates have a central through-hole, which is slightly smaller than the outer diameter of the sleeve 7, achieving a sealing function under the deformation of the sleeve. After the sleeve 7 extends inward and protrudes beyond the inner guide plate 8, an expansion section is provided. This expansion section is larger than the through-hole of the inner guide plate. With the tension of the springs 13, the expansion section temporarily fixes the inner guide plate 8 at a certain height in the guide groove 10. Pulling the sleeve 7 inward inside the test chamber causes the flange outside the test chamber to compress the spring 13 under the pull of the sleeve 7. This causes the expanded part to disengage from the inner guide plate 8, releasing the compression on the inner guide plate 8. This allows the height of the sleeve 7 to be adjusted up and down, thereby adjusting the height of the internal terminal block 5. After adjusting to the desired height, release the sleeve 7. Under the restoring force of the spring 13, the expanded part re-compresses the inner guide plate 8, fixing the height position.

[0025] An elastic sealing gasket 14 is installed in the groove 11 above and below the sleeve 7. This elastic sealing gasket is as follows: Figure 7 As shown, the structure of the outer elastic shell with spring wire 15 inside is as follows: when the sleeve squeezes the elastic sealing gasket 14, the spring wire is squeezed and contracted. The elastic sealing gasket 14 located at the other end of the sleeve is always squeezed to a state of tight contact with the sleeve under the supporting force of the contracted spring wire 15, thus maintaining good sealing performance.

[0026] An air inlet pipe 1 is installed on the left side wall of the test chamber 4, and an air outlet pipe 6 is installed on the right side wall of the test chamber. A pressure regulating valve and a flow valve are installed on the air inlet pipe.

[0027] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A testing apparatus for detecting the performance of a gas detector, characterized in that, The test chamber (4) includes a test chamber (5) with multiple terminal blocks (5) slidably installed on the rear side wall of the test chamber. A sealing ring (17) is provided between the terminal blocks and the side wall of the test chamber. An air inlet pipe (1) is installed on the left side wall of the test chamber. An air outlet pipe (6) is installed on the right side wall of the test chamber. A pressure regulating valve (2) and a flow valve (3) are provided on the air inlet pipe.

2. The test apparatus for detecting the performance of a gas detector according to claim 1, characterized in that, The terminal block (5) is connected to the power supply outside the test chamber via a lead wire (12). The lead wire (12) is fitted inside a sleeve (7), which is slidably connected to the rear side wall of the test chamber.

3. The test apparatus for detecting the performance of a gas detector according to claim 2, characterized in that, The portion of the sleeve (7) located outside the test chamber has a flange at its end, and a spring (13) is provided between the flange and the outer wall of the test chamber. The portion of the sleeve (7) located inside the test chamber has an expansion part, which is slidably connected to the inner wall of the test chamber.

4. The test apparatus for detecting the performance of a gas detector according to claim 3, characterized in that, The test chamber has a vertical groove (11) on the rear wall. The sleeve (7) is slidably installed in the groove. An elastic sealing gasket (14) is installed in the groove above and below the sleeve.

5. The test apparatus for detecting the performance of a gas detector according to claim 3, characterized in that, The inner and outer walls of the test chamber (4) are provided with guide grooves on both sides of the slide groove (11), and an inner guide plate (8) is provided in the inner guide groove. The inner guide plate is in contact with the expansion part.

6. The test apparatus for detecting the performance of a gas detector according to claim 5, characterized in that, An outer guide plate (9) is provided in the outer guide groove, the outer guide plate (9) abuts against the spring (13), and a ball is provided between the outer guide groove and the outer guide plate.

7. The test apparatus for detecting the performance of a gas detector according to claim 1, characterized in that, The multiple terminal blocks (5) are arranged horizontally in sequence on the rear side wall of the test chamber.

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