Gas leakage prevention device capable of automatically resetting

Abstract

The utility model provides a coal gas leakproof device capable of automatically resetting, which relates to the technical field of coal gas leakproof, and comprises a bottom plate, the upper surface of the bottom plate is sequentially provided with a coal gas leakproof device, an electric control box and a pressure relief device, one end of the coal gas leakproof device is connected with a coal gas drainer, and the other end of the coal gas leakproof device is connected with the pressure relief device through a water outlet pipe. When the coal gas is overpressure instantly, the coal gas leakproof device jumps, the indicating rod pops up and approaches to the signal switch, the signal switch sends out an instruction signal, the gas leakproof device and the pressure relief device are connected through the electromagnetic valve, the electromagnetic valve is arranged on the exhaust pipe, and the filtering assembly is arranged on the water outlet pipe. After the electric control box is delayed for 5S through the time relay, the electromagnetic valve is automatically opened, the gas held in the cavity of the pressure relief device begins to be discharged, after the time is delayed for 30-50S, the gas pressure returns to normal, the gas leakage prevention device automatically resets, the indicating rod retracts, the signal switch leaves, the signal switch sends out an instruction signal, and the electromagnetic valve is automatically closed.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal gas leakproof technology field, specifically, relate to a kind of automatic reset coal gas leakproof device. BACKGROUND

[0002] Leakage-proof gas drainer has been widely promoted and applied in the steel and coal gas industry across the country. From the perspective of "preventing gas leakage", the gas leakproof device does play a role in safety protection in the online operation of the drainer. It ensures the safe operation of the gas pipeline and eliminates safety hazards. However, in actual use, the existing gas leakproof device has the defect that it cannot automatically reset after being closed, which makes it impossible to automatically replenish the water in the drainage sealing tank and the gas pipeline cannot drain normally. The common method adopted by the domestic steel industry is to have professional personnel regularly inspect the gas drainer, and if the leakproof device is closed, it is manually reset (the "gas retention" is removed) by manual operation, the drainer is manually replenished to a safe water seal height, and the drainer is put into normal operation. The consequences of using this method are: 1. High cost of human resources; 2. Safety accidents may occur during manual operation; 3. If the leakproof device is not disposed of in time after being closed, it may cause serious water accumulation in the gas pipeline, which may pose a safety hazard. SUMMARY

[0003] The main purpose of the utility model is to provide a gas leakproof device that can automatically reset, which can effectively solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a gas leakproof device that can automatically reset, which includes a bottom plate, a gas leakproof device, an electrical control box and a pressure relief device installed in order on the upper surface of the bottom plate, one end of the gas leakproof device is connected to a gas drainer, and the other end is connected to the pressure relief device through a water outlet pipe, an indicating rod and a signal switch are provided on the gas leakproof device, the signal switch is located directly above the indicating rod, an exhaust pipe is provided between the gas leakproof device and the pressure relief device, an electromagnetic valve is provided on the exhaust pipe, the electromagnetic valve switch is connected to the electrical control box, and a filter assembly is provided on the water outlet pipe.

[0005] As a preferred embodiment, a manual bypass assembly is provided on the gas leakproof device.

[0006] As a preferred embodiment, the filter assembly includes a filter box, which is fixedly installed in the middle part of the water outlet pipe.

[0007] As a preferred embodiment, a box cover is provided on one end surface of the filter box, and a plurality of bolt holes are equidistantly provided on the front surface of the filter box.

[0008] As preferred, a bolt is arranged on the box cover, and the top end of the bolt engages with the bolt hole.

[0009] As preferred, a limiting slot is arranged on the inner surface of the box cover, and a positioning frame is arranged in the limiting slot, and a filter screen is fixedly installed between the inner walls of the positioning frame.

[0010] As preferred, a positioning slot is arranged on the inner wall of the filter box, and the positioning frame is arranged in the positioning slot.

[0011] Compared with the prior art, the utility model has the advantages of:

[0012] (1) when the coal gas is instantaneously over-pressured: the coal gas leakage prevention device is triggered, the indicating rod is popped out, the proximity signal switch is approached, the signal switch sends a command signal, the electromagnetic valve is automatically opened after the time relay of the electric control box is delayed for 5s, the coal gas accumulated in the pressure relief device cavity is started to be discharged, the gas pressure is restored to normal after being delayed for 30-50s, the coal gas leakage prevention device is automatically reset, the indicating rod is retracted, the signal switch is left, the signal switch sends a command signal, and the electromagnetic valve is automatically closed.

[0013] (1) when the coal gas is instantaneously over-pressured: the coal gas leakage prevention device is triggered, the indicating rod is popped out, the proximity signal switch is approached, the signal switch sends a command signal, the electromagnetic valve is automatically opened after the time relay of the electric control box is delayed for 5s, the coal gas accumulated in the pressure relief device cavity is started to be discharged, the gas pressure is restored to normal after being delayed for 30-50s, the coal gas leakage prevention device is automatically reset, the indicating rod is retracted, the signal switch is left, the signal switch sends a command signal, and the electromagnetic valve is automatically closed. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the coal gas leakage prevention device capable of being automatically reset.

[0015] Figure 2 It is a structural schematic view of the coal gas leakage prevention device capable of being automatically reset.

[0016] Figure 3 It is a structural schematic view of the coal gas leakage prevention device capable of being automatically reset.

[0017] Figure 4 It is a structural schematic view of the coal gas leakage prevention device capable of being automatically reset.

[0018] In the diagram: 1. Signal switch; 2. Indicator rod; 3. Gas leak prevention device; 4. Solenoid valve; 5. Electrical control box; 6. Pressure relief device; 7. Filter assembly; 701. Filter box; 702. Box cover; 703. Positioning groove; 704. Bolt hole; 705. Bolt; 706. Limiting groove; 707. Positioning frame; 708. Filter screen; 8. Exhaust pipe; 9. Manual bypass assembly; 10. Water outlet pipe; 11. Base plate. Detailed Implementation

[0019] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0020] like Figure 1 , 2 As shown, an automatic reset gas leak prevention device includes a base plate 11. A gas leak prevention device 3, an electrical control box 5, and a pressure relief device 6 are sequentially installed on the upper surface of the base plate 11. One end of the gas leak prevention device 3 is connected to a gas drainer, and the other end is connected to the pressure relief device 6 through a water outlet pipe 10. The gas leak prevention device 3 is equipped with an indicator rod 2 and a signal switch 1. The signal switch 1 is located directly above the indicator rod 2. An exhaust pipe 8 is provided between the gas leak prevention device 3 and the pressure relief device 6. A solenoid valve 4 is provided on the exhaust pipe 8. The solenoid valve 4 is connected to the electrical control box 5. A filter assembly 7 is provided on the water outlet pipe 10.

[0021] like Figure 1 As shown, the gas leak prevention device 3 is equipped with a manual bypass component 9.

[0022] like Figure 2 , 3As shown in FIGS. 4, the filter assembly 7 comprises a filter box 701 fixedly installed in the middle of the water outlet pipe 10, one end surface of the filter box 701 is provided with a box cover 702, equidistantly a plurality of bolt holes 704 are arranged on the front surface of the filter box 701, a bolt 705 is arranged on the box cover 702, the top end of the bolt 705 is engaged with the inside of the bolt hole 704, a limiting groove 706 is arranged on the inside surface of the box cover 702, a positioning frame 707 is arranged in the limiting groove 706, a filter screen 708 is fixedly installed between the inner walls of the positioning frame 707, a positioning groove 703 is arranged on the inner wall of the filter box 701, the positioning frame 707 is arranged in the positioning groove 703, when the filter screen 708 needs to be cleaned and replaced, the staff rotates the bolt 705, the bolt 705 is separated from the inside of the bolt hole 704, at this time, the box cover 702 is separated from the surface of the filter box 701, at this time, the positioning frame 707 can be taken out from the inside of the positioning groove 703, and the filter screen 708 can be taken out from the inside of the filter box 701, and vice versa, the filter screen 708 can be installed, the device is convenient for dismounting, installing and cleaning the filter screen 708.

[0023] The working principle of the automatic reset gas leakage prevention device is as follows:

[0024] When the gas pressure is instantaneously overpressure, the gas leakage prevention device 3 jumps, the indicating rod 2 is ejected, the proximity signal switch 1 is approached, the signal switch 1 sends a command signal, the electromagnetic valve 4 is automatically opened after the time relay of the electrical control box 5 is delayed for 5 seconds, the gas trapped in the pressure relief device 6 is discharged, the pressure is restored to normal after being delayed for 30-50 seconds, the gas leakage prevention device 3 is automatically reset, the indicating rod 2 is retracted, the proximity signal switch 1 is separated, the signal switch 1 sends a command signal, and the electromagnetic valve 4 is automatically closed.

[0025] When the gas pressure is instantaneously overpressure, the gas leakage prevention device 3 jumps, the indicating rod 2 is ejected, the proximity signal switch 1 is approached, the signal switch 1 sends a command signal, the electromagnetic valve 4 is automatically opened after the time relay of the electrical control box 5 is delayed for 5 seconds, the gas trapped in the pressure relief device 6 is discharged, the pressure is restored to normal after being delayed for 30-50 seconds, the gas leakage prevention device 3 is automatically reset, the indicating rod 2 is retracted, the proximity signal switch 1 is separated, the signal switch 1 sends a command signal, and the electromagnetic valve 4 is automatically closed.

[0026] When the filter screen 708 needs to be cleaned and replaced, the staff rotates the bolt 705, and the bolt 705 is separated from the bolt hole 704, at this time, the box cover 702 can be separated from the surface of the filter box 701, at this time, the positioning frame 707 can be taken out from the positioning groove 703, and the filter screen 708 can be taken out from the filter box 701, and vice versa, the filter screen 708 can be installed, the device is convenient for disassembling and installing the filter screen 708, and the filter screen 708 can be cleaned.

[0027] The above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not limitations on the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or changes can be made on the basis of the above description, and all the embodiments cannot be exhausted here. Any obvious changes or changes derived from the technical scheme of the utility model still fall within the protection scope of the utility model.

Claims

1. A self-resetting gas leak prevention device comprising a base plate (11), characterised in that: The bottom plate (11) upper surface is sequentially provided with gas leakage prevention device (3), electrical control box (5), pressure relief device (6), one end of the gas leakage prevention device (3) is connected with gas drainer, the other end is connected with pressure relief device (6) through water outlet pipe (10), the gas leakage prevention device (3) is provided with indicating rod (2) and signal switch (1), the signal switch (1) is located above the indicating rod (2), the gas leakage prevention device (3) and pressure relief device (6) are provided with exhaust pipe (8), the exhaust pipe (8) is provided with electromagnetic valve (4), the electromagnetic valve (4) switch is connected with electrical control box (5), the water outlet pipe (10) is provided with filter assembly (7).

2. The automatic resettable gas leakage prevention device according to claim 1, wherein; The gas leakage prevention device (3) is provided with manual bypass assembly (9).

3. The automatic resettable gas leakage prevention device according to claim 1, characterized in that: The filter assembly (7) comprises a filter box (701), and the filter box (701) is fixedly installed in the middle portion of the water outlet pipe (10).

4. The automatic resettable gas leakage prevention device according to claim 3, characterized in that: One end surface of the filter box (701) is provided with a box cover (702), and a plurality of bolt holes (704) are equidistantly arranged on the front surface of the filter box (701).

5. The automatic resettable gas leak prevention device of claim 4, wherein: The box cover (702) is provided with a bolt (705), and the top end of the bolt (705) is engaged and arranged in the bolt hole (704).

6. The automatic resettable gas leak prevention device of claim 5, wherein: A limiting groove (706) is formed in the inner surface of the box cover (702), a positioning frame (707) is arranged in the limiting groove (706), and a filter screen (708) is fixedly installed between the inner walls of the positioning frame (707).

7. The self-resetting gas leak prevention device of claim 6, wherein: Positioning grooves (703) are formed in the inner walls of the filter box (701), and the positioning frame (707) is arranged in the positioning grooves (703).

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