Multifunctional test device suitable for positive pressure type explosion-proof equipment

Abstract

The utility model belongs to the field of positive pressure type explosion-proof equipment detection, and particularly relates to a multifunctional testing device suitable for positive pressure type explosion-proof equipment, which comprises an equipment model machine provided with an air inlet, an exhaust port and a concentration sampling port. A pressure sampling port is formed in the outer wall of the equipment sample machine, an adjusting structure is fixedly connected to the outer wall of the equipment sample machine and comprises an adjusting seat, an adjusting seat is fixedly connected to the outer wall of the equipment sample machine, and a movable block is slidably connected to the inner wall of the adjusting seat. According to the multifunctional testing device suitable for the positive pressure type explosion-proof equipment, the connecting block and the clamping groove are clamped, then the position of the connecting block is changed, the position of the movable block is changed accordingly, the position of the detection pipe in an equipment model machine is driven to be changed, the adaptability of the device is improved, and then the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of positive pressure explosion-proof equipment detection, in particular to a multifunctional testing device suitable for positive pressure explosion-proof equipment. Background Art

[0002] Explosion-proof equipment refers to equipment that is designed and manufactured according to specified conditions (explosion-proof type) and will not cause explosions in the surrounding explosive mixture (explosion-hazardous places). The three elements of explosion are combustibles, combustion aids and detonation sources. Explosion-proofing must be considered from the three elements. Limiting one of the elements will limit the occurrence of explosions. The explosion-proof principle of positive pressure explosion-proof equipment is to place electrical equipment that may ignite explosive mixtures into an outer casing, and to pass fresh air or inert gas at a certain pressure into the outer casing of the equipment, so that the surrounding flammable gas cannot enter the inner casing and the internal flammable gas is discharged, thereby preventing the ignition source from contacting the explosive gas and achieving the purpose of preventing explosions.

[0003] At present, when testing positive pressure explosion-proof equipment, the test equipment required for the test includes flow measurement devices, gas analysis devices, pressure measurement devices, etc. Due to different application scenarios, the volume, protective gas flow rate, and protective gas type of positive pressure explosion-proof equipment vary greatly, resulting in different requirements for the required test conditions and the specifications of the above test equipment required for the test. Moreover, for the same positive pressure explosion-proof equipment, the test conditions required for different type tests and the specifications and combinations of the test equipment required for the tests are also different. For laboratories, the test equipment that needs to be repeatedly replaced and moved for multiple tests not only takes a long time to prepare for the test, but also puts greater pressure on the management and preservation of the equipment. In view of this, we propose a multifunctional test device suitable for positive pressure explosion-proof equipment. Utility Model Content

[0004] The main purpose of the utility model is to provide a multifunctional testing device suitable for positive pressure explosion-proof equipment, which can solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model proposes a multifunctional test device suitable for positive pressure explosion-proof equipment, including a device prototype, the device prototype is provided with an air inlet, the device prototype is provided with an outlet, the device prototype is provided with a concentration sampling port, and the device prototype is provided with a pressure sampling port. The outer wall of the device prototype is fixedly connected with an adjustment structure, and the adjustment structure includes:

[0006] An adjustment seat, the outer wall of the equipment prototype is fixedly connected with the adjustment seat, and the inner wall of the adjustment seat is slidably connected with a movable block;

[0007] A guide seat, wherein the bottom of the adjustment seat is fixedly connected with the guide seat, and the inner wall of the guide seat is slidably connected with a sealing plate;

[0008] A sealing cover is rotatably connected to the outer wall of the sealing plate, and a fixing block is fixedly connected to the bottom of the adjusting seat.

[0009] Preferably, the outer wall of the movable block is threadedly connected to a connecting block, the inner wall of the fixed block is slidably connected to a sliding rod, the end of the sliding rod away from the fixed block is fixedly connected to a stop block, the lower half of the movable block is provided with a partial thread, the inner wall of the connecting block is threadedly connected to the lower half of the movable block, the top of the connecting block is tightly attached to the bottom of the adjusting seat, so that the position of the movable block is fixed, three groups of movable blocks are provided, a through hole is opened on the movable block, the inner wall of the through hole is fixedly connected to a detection tube, and three groups of detection tubes are also provided, and the three groups of detection tubes have different lengths, which is convenient for detecting gas concentrations at different heights in the equipment prototype, the bottom of the sealing plate is fixedly connected to a threaded rod, and the outer wall of the threaded rod is threadedly connected to a fixing nut.

[0010] Preferably, flow measuring device 1, flow measuring device 2, flow measuring device 3, and flow measuring device 4 are fixedly connected at the air inlet, respectively; valve 1 is fixedly connected behind flow measuring device 1, valve 2 is fixedly connected behind flow measuring device 2, valve 3 is fixedly connected behind flow measuring device 3, and valve 4 is fixedly connected behind flow measuring device 4; valve 1, valve 2, valve 3, and valve 4 are all provided with connecting pipes, which are connected to an external air source through the connecting pipes.

[0011] Preferably, the inner wall of the movable block is provided with a detection tube, and valve five, valve ten, and valve twelve are fixedly connected to the detection tube respectively, valve six is ​​fixedly connected to the valve five, valve seven is fixedly connected to the valve ten, valve eight is fixedly connected to the valve twelve, an oxygen gas analysis device is fixedly connected to the valve six, a carbon dioxide gas analysis device is fixedly connected to the valve seven, and a helium gas analysis device is fixedly connected to the valve eight.

[0012] Preferably, a valve nine is provided at the pressure sampling port, and a pressure measuring device is fixedly connected to the valve nine, so that pressure detection work inside the equipment prototype can be easily performed through the pressure measuring device.

[0013] Preferably, an exhaust pipe is fixedly connected to the back of the equipment prototype, and a valve 11 is fixedly connected to the middle of the exhaust pipe. By opening the valve 11, the exhaust pipe can be exhausted.

[0014] The utility model provides a multifunctional test device suitable for positive pressure explosion-proof equipment. It has the following beneficial effects:

[0015] (1) The multifunctional testing device for positive pressure explosion-proof equipment is adapted to improve the adaptability of the device and the practicability of the device by connecting the connecting block to the connecting groove and then changing the position of the connecting block so that the position of the movable block changes accordingly, thereby driving the internal position of the detection tube in the device prototype to change.

[0016] (2) This multifunctional test device for positive pressure explosion-proof equipment uses gas tracing to precisely control the opening and switching of valves, continuously monitor gas concentration, ensure uniform gas filling, and efficiently complete ventilation when conducting positive pressure ventilation without internal release source and static positive pressure inflation program tests, as well as ventilation and dilution tests of positive pressure shells with internal release sources. This process improves ventilation efficiency and test reliability, and provides data support for equipment optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the prototype and the adjustment structure of the utility model equipment;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the adjustment seat and the movable block of the utility model;

[0021] Figure 4 It is a schematic diagram of the exploded structure of the movable block and the connecting block of the utility model.

[0022] Description of the accompanying figures: 1. Equipment prototype; 2. Air inlet; 3. Exhaust outlet; 4. Concentration sampling port; 5. Pressure sampling port; 6. Adjustment structure; 61. Adjustment seat; 62. Movable block; 63. Guide seat; 64. Sealing plate; 65. Sealing cover; 66. Fixed block; 67. Connecting block; 7. Sliding rod; 8. Stopper; 901. Flow measurement device 1; 902. Flow measurement device 2; 903. Flow measurement device 3; 904. Flow measurement device 4; 1 001, valve one; 1002, valve two; 1003, valve three; 1004, valve four; 1005, valve five; 1006, valve six; 1007, valve seven; 1008, valve eight; 1009, valve nine; 1010, valve ten; 1011, valve eleven; 1012, valve twelve; 11, oxygen gas analysis device; 12, carbon dioxide gas analysis device; 13, helium gas analysis device; 14, pressure measuring device.

[0023] The specific locations of the concentration sampling port and pressure sampling port of the equipment are determined according to different test conditions. The illustration in this new model is only a schematic diagram.

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1

[0027] See also Figure 2-Figure 4The utility model proposes a multifunctional test device suitable for positive pressure explosion-proof equipment, including an equipment prototype 1, an air inlet 2 is arranged on the front of the equipment prototype 1, an exhaust port 3 is arranged on the back of the equipment prototype 1, a concentration sampling port 4 is arranged on the equipment prototype 1, a pressure sampling port 5 is arranged on the outer wall of the equipment prototype 1, and an adjustment structure 6 is fixedly connected to the outer wall of the equipment prototype 1. The adjustment structure 6 includes an adjustment seat 61, and the bottom of the equipment prototype 1 is fixedly connected to the adjustment seat 61. The adjustment seat 61 is provided with an adjustment groove, and the adjustment groove is provided with three groups. The inner wall of the adjustment groove is slidably connected with a movable block 62, and the bottom of the adjustment seat 61 is fixedly connected with a guide seat 63, and the inner wall of the guide seat 63 is slidably connected with a sealing plate 64, and the outer wall of the sealing plate 64 is rotatably connected with a sealing cover 65, and the sealing plate 64 is provided with three groups. The bottom of the sealing plate 64 is fixedly connected with a threaded rod, and the outer wall of the threaded rod is threadedly connected with a fixing nut. The sealing plate 64 slides on the guide seat 63 by loosening the fixing nut, and the sealing plate 64 moves through the movement of the sealing plate 64. The sealing cover 65 is opened, and a snap-in groove is provided on the sealing plate 64. There are five groups of snap-in grooves, which can be snap-in with the connecting block 67. The bottom of the adjusting seat 61 is fixedly connected with a fixed block 66. The outer wall of the movable block 62 is threadedly connected with the connecting block 67. The inner wall of the fixed block 66 is slidably connected with a slide rod 7. The end of the slide rod 7 away from the fixed block 66 is fixedly connected with a stopper 8. The outer wall of the stopper 8 is welded with a return spring. The end of the return spring away from the stopper 8 is welded to the outer wall of the fixed block 66. The movable block 6 2 is provided with partial threads, the inner wall of the connecting block 67 is threadedly connected to the lower half of the movable block 62, the top of the connecting block 67 is tightly attached to the bottom of the adjusting seat 61, and when the connecting block 67 is snapped into the snap-in groove, the position of the movable block 62 is fixed. The movable block 62 is provided with three groups, and a through hole is opened on the movable block 62. The inner wall of the through hole is fixedly connected with a detection tube. The detection tube is also provided with three groups. The lengths of the three groups of detection tubes are different, which is convenient for detecting the gas concentration at different heights in the equipment prototype 1.

[0028] Embodiment 2

[0029] Based on Example 1, please refer to Figure 1 When conducting a leakage test, close the exhaust port of the equipment prototype, open the air source, open valve 1001 and valve 1009, close the remaining valves, adjust the intake flow of the air inlet 2 by adjusting the flow measurement device 901, and confirm the pressure in the positive pressure shell of the equipment prototype 1 through the pressure measurement device 14, and finally make the pressure in the positive pressure shell of the equipment prototype 1 the same as the maximum pressure during normal operation specified by the manufacturer, record the reading of the flow measurement device 901, and the reading at this time is the leakage flow of the prototype. If it is found that the range of the flow measurement device 901 is not suitable for this test, close valve 1001 and switch to the remaining flow measurement devices to conduct the test.

[0030] Embodiment 3

[0031] Based on Example 1, please refer to Figure 1 When it is necessary to conduct a ventilation test without an internal release source and the protective gas is air, when the test gas is helium, connect the helium source, open valves 1002, 1005, 1008, and 1011, switch the concentration sampling ports by switching the opening and closing of valves 105, 1010, and 1012, and observe the reading of the helium gas analyzer 13. When the helium concentration detected by all concentration sampling ports exceeds 70%, close all valves and stop the helium supply. Connect the air source, open valves 1003 and 1011, adjust the flow measurement device 903, keep the flow at the minimum ventilation flow value claimed by the prototype supplier, and start timing. Open valve 1008, switch the concentration sampling port by switching the opening and closing of valves 1005, 1010, and 1012, and measure the helium concentration of the concentration sampling port by the helium gas analyzer 13. When the helium concentration of any concentration sampling port is lower than 1%, it means that the ventilation is completed, and the ventilation time is recorded.

[0032] Embodiment 4

[0033] Based on Example 1, please refer to Figure 1 When it is necessary to conduct a ventilation test without an internal release source and with an inert gas as the protective gas, fill the equipment prototype 1 with air at normal atmospheric pressure and close all valves. Connect the inert gas source specified by the equipment prototype manufacturer, open valves 1004 and 1011, and adjust the flow measurement device 4904 to confirm the flow, so that the flow remains at the minimum ventilation flow value claimed by the equipment prototype supplier, and start timing. Open valves 1005 and 1006, and switch the concentration sampling port by switching valves 1005, 1010, and 1012. When the oxygen gas analysis device 11 measures that the oxygen concentration at any concentration sampling port is less than 2%, it means that the ventilation is completed, and the ventilation time is recorded.

[0034] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A multifunctional test device suitable for positive pressure explosion-proof equipment, comprising an equipment prototype (1), characterized in that: The device prototype (1) is provided with an air inlet (2), the device prototype (1) is provided with an outlet (3), the device prototype (1) is provided with a concentration sampling port (4), the outer wall of the device prototype (1) is provided with a pressure sampling port (5), and the outer wall of the device prototype (1) is fixedly connected with an adjustment structure (6), and the adjustment structure (6) comprises: An adjustment seat (61), the outer wall of the equipment prototype (1) is fixedly connected to the adjustment seat (61), and the inner wall of the adjustment seat (61) is slidably connected to a movable block (62); A guide seat (63), wherein the bottom of the adjustment seat (61) is fixedly connected to the guide seat (63), and the inner wall of the guide seat (63) is slidably connected to a sealing plate (64); A sealing cover (65) is rotatably connected to the outer wall of the sealing plate (64), and a fixing block (66) is fixedly connected to the bottom of the adjustment seat (61).

2. A multifunctional test device suitable for positive pressure explosion-proof equipment according to claim 1, characterized in that: The outer wall of the movable block (62) is threadedly connected to a connecting block (67), the inner wall of the fixed block (66) is slidably connected to a sliding rod (7), and one end of the sliding rod (7) away from the fixed block (66) is fixedly connected to a stopper (8).

3. A multifunctional test device suitable for positive pressure explosion-proof equipment according to claim 1, characterized in that: The air inlet (2) is respectively fixedly connected with a flow measuring device one (901), a flow measuring device two (902), a flow measuring device three (903), and a flow measuring device four (904); the flow measuring device one (901) is fixedly connected with a valve one (1001) behind, the flow measuring device two (902) is fixedly connected with a valve two (1002) behind, the flow measuring device three (903) is fixedly connected with a valve three (1003) behind, and the flow measuring device four (904) is fixedly connected with a valve four (1004) behind.

4. A multifunctional test device suitable for positive pressure explosion-proof equipment according to claim 1, characterized in that: The inner wall of the movable block (62) is provided with a detection tube, to which valve five (1005), valve ten (1010), and valve twelve (1012) are fixedly connected respectively; valve five (1005) is fixedly connected with valve six (1006); valve ten (1010) is fixedly connected with valve seven (1007); valve twelve (1012) is fixedly connected with valve eight (1008); valve six (1006) is fixedly connected with an oxygen gas analysis device (11); valve seven (1007) is fixedly connected with a carbon dioxide gas analysis device (12); and valve eight (1008) is fixedly connected with a helium gas analysis device (13).

5. A multifunctional testing device suitable for positive pressure explosion-proof equipment according to claim 1, characterized in that: A valve nine (1009) is provided at the pressure sampling port (5), and a pressure measuring device (14) is fixedly connected to the valve nine (1009).

6. A multifunctional testing device suitable for positive pressure explosion-proof equipment according to claim 1, characterized in that: An exhaust pipe is fixedly connected to the outer wall of the equipment prototype (1), and a valve eleven (1011) is fixedly connected to the middle of the exhaust pipe.

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