Valve high and low temperature airtight test system

Abstract

The utility model discloses a valve high and low temperature air tightness test system, which relates to the technical field of valve air tightness test, and comprises a base, an air tightness tester, and a heat preservation mechanism arranged on the surface of a connecting pipe and used for carrying out heat preservation treatment on a pipeline. A fixing mechanism used for fixing the heat preservation sleeve to the connecting pipe is arranged on the surface of the connecting sleeve. According to the heat preservation mechanism, the connecting pipe is sleeved with the heat preservation sleeve, the elastic bandage is pulled, and the outer surface of the second connecting piece at one end of the elastic bandage is attached to the first connecting piece, so that the heat preservation sleeve can be bound to the connecting pipe through the elastic bandage, and heat preservation treatment can be conducted on the surface of the connecting pipe through the heat preservation sleeve; meanwhile, the thermal insulation sleeve is composed of the thermal insulation layer, the protective layer and the waterproof layer, so that the thermal insulation sleeve is more durable in use.

Description

Technical Field

[0001] The utility model relates to the technical field of valve airtightness testing, in particular to a high and low temperature airtightness testing system for valves. Background Art

[0002] According to standards such as EN161 and EN13611, gas valves (solenoid valves, pressure regulating valves, filters, etc.) need to be tested for air tightness in high temperature (60°C or higher) or low temperature (-15°C or -20°C or even lower) environments when in use. However, when testing the valves under test, since all gas connection pipes are exposed to the outside, during use, the external temperature difference of most pipes may be too large, resulting in test errors during the air tightness test, affecting the test results.

[0003] Based on this, a high and low temperature air tightness test system for valves is now provided, which can eliminate the disadvantages of existing devices. Utility Model Content

[0004] The purpose of the present invention is to provide a high and low temperature air tightness test system for valves, so as to solve the problem in the background technology that most of the gas connection pipes are exposed to the outside, which may cause test errors during the air tightness test and affect the test results.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A high and low temperature air tightness test system for valves includes an air tightness tester, both ends of the air tightness tester are fixedly connected to connecting sleeves, the inner wall of the connecting sleeve is fixedly connected to a connecting pipe, one end of the air tightness tester is connected to the valve to be tested through the connecting sleeve and the connecting pipe, and the other end is connected to a temperature buffer tank through the connecting sleeve and the connecting pipe, the surface of the connecting pipe is provided with an insulation mechanism for insulating the pipeline, and the surface of the connecting sleeve is provided with a fixing mechanism for fixing the insulation sleeve on the connecting pipe.

[0007] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In an optional solution: the insulation mechanism includes an insulation sleeve, an elastic band, a first connecting piece and a second connecting piece. The insulation sleeve is placed on the surface of the connecting pipe. Multiple groups of elastic bands are fixedly connected to the surface of the insulation sleeve. The top of one end of the elastic band is fixedly connected to the first connecting piece, and the bottom of the other end is fixedly connected to the second connecting piece.

[0009] In an optional solution: the thermal insulation sleeve is composed of a thermal insulation layer, a protective layer and a waterproof layer.

[0010] In an optional solution, the surface of the first connecting piece is made of relatively soft fibers, and the surface of the second connecting piece is made of elastic fibers with hooks and barbs.

[0011] In an optional scheme: the fixing mechanism includes a first fixing sleeve, a second fixing sleeve, a fixing groove, a connecting groove, a connecting block, a threaded hole, a bolt and a nut, the first fixing sleeve is slidably connected to one side of the surface of the connecting sleeve, and the second fixing sleeve is slidably connected to the other side, the first fixing sleeve and the second fixing sleeve are provided with fixing grooves inside, the inner walls of the fixing grooves cooperate with the connecting sleeve, the bottom of the first fixing sleeve is provided with a connecting groove, the bottom of the second fixing sleeve is fixedly connected to the connecting block, the inner wall of the connecting groove cooperates with the connecting block, the tops of the first fixing sleeve and the second fixing sleeve are provided with threaded holes, the inner walls of the threaded holes are threadedly connected to the bolts, and one end of the bolts is threadedly connected to the nut.

[0012] In an optional solution, the inner wall size of the connecting groove matches the outer wall size of the connecting block.

[0013] In an optional solution: a first temperature control box is provided on the surface of the valve to be tested, and a second temperature control box is provided on the surface of the temperature buffer tank.

[0014] In an optional solution: one end of the temperature buffer tank is connected to the drying filter through a connecting sleeve and a connecting pipe, one end of the drying filter is connected to the air storage tank through a connecting sleeve and a connecting pipe, and one end of the air storage tank is connected to the air compressor through a connecting sleeve and a connecting pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] In the utility model, the insulation sleeve is put on the connecting pipe through the insulation mechanism, and the elastic band is pulled to stick the outer surface of the second connecting piece at one end of the elastic band to the first connecting piece, so that the insulation sleeve can be tied to the connecting pipe through the elastic band. The surface of the connecting pipe can be insulated by the insulation sleeve to prevent testing errors caused by temperature differences. At the same time, the insulation sleeve is composed of an insulation layer, a protective layer and a waterproof layer, so that the insulation sleeve is more durable in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the present utility model.

[0018] Figure 2 This is a schematic structural diagram of the heat preservation mechanism of the present utility model.

[0019] Figure 3 This is a schematic diagram of the structure of the insulation cover and the elastic band in cooperation with each other in the utility model.

[0020] Figure 4This is a structural diagram of the fixing mechanism of the present utility model.

[0021] Figure 5 This is a schematic diagram of the matching structure of the connecting groove and the connecting block of the utility model.

[0022] Notes on the accompanying drawings: 1. Airtightness tester; 2. Connecting sleeve; 3. Connecting pipe; 4. First temperature control box; 5. Valve to be tested; 6. Second temperature control box; 7. Temperature buffer tank; 8. Insulation mechanism; 801. Insulation sleeve; 802. Elastic band; 803. First connecting piece; 804. Second connecting piece; 9. Fixing mechanism; 901. First fixing sleeve; 902. Second fixing sleeve; 903. Fixing groove; 904. Connecting groove; 905. Connecting block; 906. Threaded hole; 907. Bolt; 908. Nut; 10. Drying filter; 11. Air storage tank; 12. Air compressor. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0024] In one embodiment, Figure 1-Figure 5 As shown, a high and low temperature air tightness test system for valves includes an air tightness tester 1, both ends of the air tightness tester 1 are fixedly connected with connecting sleeves 2, the inner wall of the connecting sleeve 2 is fixedly connected with a connecting pipe 3, one end of the air tightness tester 1 is connected to the valve 5 to be tested through the connecting sleeve 2 and the connecting pipe 3, and the other end is connected to the temperature buffer tank 7 through the connecting sleeve 2 and the connecting pipe 3. The surface of the connecting pipe 3 is provided with an insulation mechanism 8 for insulating the pipeline, which is used to insulate the surface of the connecting pipe 3 to prevent test errors caused by temperature differences. The surface of the connecting sleeve 2 is provided with a fixing mechanism 9 for fixing the insulation sleeve 801 on the connecting pipe 3, so that the insulation sleeve 801 will not shake at will on the connecting pipe 3.

[0025] In one embodiment, Figure 2 - Figure 3 As shown, the insulation mechanism 8 includes an insulation sleeve 801, an elastic band 802, a first connecting piece 803 and a second connecting piece 804. The insulation sleeve 801 is placed on the surface of the connecting pipe 3, and multiple groups of elastic bands 802 are fixedly connected to the surface of the insulation sleeve 801. The top of one end of the elastic band 802 is fixedly connected to the first connecting piece 803, and the bottom of the other end is fixedly connected to the second connecting piece 804. The insulation sleeve 801 is put on the connecting pipe 3, and the elastic band 802 is pulled to stick the outer surface of the second connecting piece 804 at one end of the elastic band 802 to the first connecting piece 803, so that the insulation sleeve 801 can be tied to the connecting pipe 3 through the elastic band 802.

[0026] In one embodiment, Figure 2As shown, the insulation sleeve 801 is composed of an insulation layer, a protective layer and a waterproof layer. The insulation layer can reduce the heat loss of the connecting pipe 3. An asbestos cement shell protective layer is generally made of a mixture of asbestos fibers and cement on the outside of the insulation layer, so that it can protect the insulation layer and make the insulation sleeve 801 more durable. At the same time, a waterproof layer is provided on the surface of the protective layer to prevent moisture from entering the insulation layer and causing damage to the insulation layer.

[0027] In one embodiment, Figure 2 As shown, the surface of the first connecting piece 803 is made of relatively soft fibers, and the surface of the second connecting piece 804 is made of elastic fibers with hooks and barbs. When in use, the first connecting piece 803 and the second connecting piece 804 are interlocked, so that the elastic fibers with hooks and barbs on the second connecting piece 804 can hook the relatively soft fibers on the first connecting piece 803, so that the first connecting piece 803 and the second connecting piece 804 can be connected together.

[0028] In one embodiment, Figure 4-Figure 5 As shown, the fixing mechanism 9 includes a first fixing sleeve 901, a second fixing sleeve 902, a fixing groove 903, a connecting groove 904, a connecting block 905, a threaded hole 906, a bolt 907 and a nut 908. The first fixing sleeve 901 is slidably connected to one side of the surface of the connecting sleeve 2, and the second fixing sleeve 902 is slidably connected to the other side. The first fixing sleeve 901 and the second fixing sleeve 902 are provided with fixing grooves 903 inside, and the inner wall of the fixing groove 903 cooperates with the connecting sleeve 2. The bottom of the first fixing sleeve 901 is provided with a connecting groove 904, and the bottom of the second fixing sleeve 902 is fixedly connected to the connecting block 905. The inner wall of the connecting groove 904 cooperates with the connecting block 905. The first fixing sleeve 901 and the second fixing sleeve A threaded hole 906 is provided on the top of 902, and a bolt 907 is threadedly connected to the inner wall of the threaded hole 906, and a nut 908 is threadedly connected to one end of the bolt 907. When the insulation sleeve 801 is tied to the connecting pipe 3, the first fixing sleeve 901 and the second fixing sleeve 902 are put on the connecting sleeve 2 through the fixing groove 903, so that the connecting block 905 can be inserted into the connecting groove 904, and then the bolt 907 is tightened to make the threaded hole 906 pass through the threaded hole 906 and be threadedly connected to the nut 908, so that one end of the first fixing sleeve 901 and the second fixing sleeve 902 can be fixed together, so that one end of the fixing sleeve can clamp one end of the insulation sleeve 801, thereby fixing the insulation sleeve 801 on the connecting pipe 3 and preventing it from sliding at will.

[0029] In one embodiment, Figure 4 As shown, the inner wall size of the connecting groove 904 matches the outer wall size of the connecting block 905. When the connecting block 905 slides inside the connecting groove 904, the connecting groove 904 can limit the sliding of the connecting block 905 to prevent the connecting block 905 from shaking inside the connecting groove 904.

[0030] In one embodiment, Figure 1 As shown, a first temperature control box 4 is provided on the surface of the valve under test 5, and a second temperature control box 6 is provided on the surface of the temperature buffer tank 7, which are used to control the temperature of the gas source inside the temperature buffer tank 7 and the temperature of the valve under test 5, so that the temperature of the gas source inside the temperature buffer tank 7 and the temperature of the valve under test 5 are kept consistent to avoid temperature differences.

[0031] In one embodiment, Figure 1 As shown, one end of the temperature buffer tank 7 is connected to the drying filter 10 through the connecting sleeve 2 and the connecting pipe 3 to remove moisture from the gas source. One end of the drying filter 10 is connected to the gas storage tank 11 through the connecting sleeve 2 and the connecting pipe 3. One end of the gas storage tank 11 is connected to the air compressor 12 through the connecting sleeve 2 and the connecting pipe 3. The gas source from the air compressor 12 is stored in the gas storage tank 11 so that the gas source pressure can be kept stable.

[0032] Working principle: The above embodiment discloses a high and low temperature airtightness test system for valves, wherein, when in use, the insulation sleeve 801 is put on the connecting pipe 3, the elastic band 802 is pulled, and the outer surface of the second connecting piece 804 at one end of the elastic band 802 is attached to the first connecting piece 803, so that the insulation sleeve 801 can be tied to the connecting pipe 3 through the elastic band 802. When the insulation sleeve 801 is tied to the connecting pipe 3, the first fixing sleeve 901 and the second fixing sleeve 902 are put on the connecting sleeve 2 through the fixing groove 903, so that the connecting block 905 can be inserted into the connecting groove 904, and then the bolt 907 is tightened to make the threaded hole 906 pass through the threaded hole 906 and be threadedly connected with the nut 908, so that one end of the first fixing sleeve 901 and the second fixing sleeve 902 can be fixed together, so that one end of the fixing sleeve can clamp one end of the insulation sleeve 801, thereby fixing the insulation sleeve 801 to the connecting pipe 3. On the top, it will not slide at will. The insulation sleeve 801 can insulate the surface of the connecting pipe 3 to prevent test errors caused by temperature differences. When the valve 5 to be tested is tested for air tightness, the gas source is stored in the gas storage tank 11 through the air compressor 12, so that the gas source pressure can be kept stable, and then the gas source is introduced into the temperature buffer tank 7 through the drying filter 10. The temperature of the gas source inside the temperature buffer tank 7 and the valve 5 to be tested is controlled by the first temperature control box 4 and the second temperature control box 6, so that the temperature of the gas source inside the temperature buffer tank 7 and the valve 5 to be tested are kept consistent to avoid temperature differences. The airtightness tester 1 obtains high-temperature (or low-temperature) gas from the temperature buffer tank 7 and then fills it into the valve 5 to be tested. The final test result will be reflected on the airtightness tester 1, and then it can be known whether the air tightness of the valve 5 to be tested meets the standard. At the same time, each group of tests needs to be repeated 5-8 times to ensure the accuracy of the test of the valve 5 to be tested.

[0033] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A high and low temperature air tightness test system for valves, comprising an air tightness tester (1), wherein both ends of the air tightness tester (1) are fixedly connected to connecting sleeves (2), the inner wall of the connecting sleeve (2) is fixedly connected to a connecting pipe (3), one end of the air tightness tester (1) is connected to a valve (5) to be tested through the connecting sleeve (2) and the connecting pipe (3), and the other end is connected to a temperature buffer tank (7) through the connecting sleeve (2) and the connecting pipe (3), and is characterized in that: The surface of the connecting pipe (3) is provided with a heat-insulating mechanism (8) for heat-insulating the pipeline, and the surface of the connecting sleeve (2) is provided with a fixing mechanism (9) for fixing the heat-insulating sleeve (801) to the connecting pipe (3).

2. A valve high and low temperature air tightness test system according to claim 1, characterized in that: The heat-insulating mechanism (8) comprises a heat-insulating sleeve (801), an elastic band (802), a first connecting piece (803) and a second connecting piece (804); the heat-insulating sleeve (801) is placed on the surface of the connecting pipe (3); a plurality of groups of elastic bands (802) are fixedly connected to the surface of the heat-insulating sleeve (801); the top of one end of the elastic band (802) is fixedly connected to the first connecting piece (803); and the bottom of the other end is fixedly connected to the second connecting piece (804).

3. A valve high and low temperature airtightness test system according to claim 2, characterized in that: The thermal insulation sleeve (801) is composed of a thermal insulation layer, a protective layer and a waterproof layer.

4. A valve high and low temperature air tightness test system according to claim 2, characterized in that: The surface of the first connecting piece (803) is made of relatively soft fibers, and the surface of the second connecting piece (804) is made of elastic fibers with hooks and barbs.

5. The high and low temperature air tightness testing system for valves according to claim 1, characterized in that: The fixing mechanism (9) comprises a first fixing sleeve (901), a second fixing sleeve (902), a fixing groove (903), a connecting groove (904), a connecting block (905), a threaded hole (906), a bolt (907) and a nut (908); one side of the surface of the connecting sleeve (2) is slidably connected to the first fixing sleeve (901), and the other side is slidably connected to the second fixing sleeve (902); the first fixing sleeve (901) and the second fixing sleeve (902) are provided with fixing grooves (903) inside, and the inner surface of the fixing grooves (903) is provided with a screw thread. The wall cooperates with the connecting sleeve (2), the bottom of the first fixing sleeve (901) is provided with a connecting groove (904), the bottom of the second fixing sleeve (902) is fixedly connected with a connecting block (905), the inner wall of the connecting groove (904) is matched with the connecting block (905), the top of the first fixing sleeve (901) and the second fixing sleeve (902) is provided with a threaded hole (906), the inner wall of the threaded hole (906) is threadedly connected with a bolt (907), and one end of the bolt (907) is threadedly connected with a nut (908).

6. A valve high and low temperature airtightness test system according to claim 5, characterized in that: The inner wall size of the connecting groove (904) matches the outer wall size of the connecting block (905).

7. The high and low temperature air tightness testing system for valves according to claim 1, characterized in that: A first temperature control box (4) is provided on the surface of the measured valve (5), and a second temperature control box (6) is provided on the surface of the temperature buffer tank (7).

8. The high and low temperature air tightness testing system for valves according to claim 1, characterized in that: One end of the temperature buffer tank (7) is connected to the drying filter (10) through a connecting sleeve (2) and a connecting pipe (3); one end of the drying filter (10) is connected to the air storage tank (11) through a connecting sleeve (2) and a connecting pipe (3); and one end of the air storage tank (11) is connected to the air compressor (12) through a connecting sleeve (2) and a connecting pipe (3).

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