CN205948229U - Be used for continuous flame arrestor of combustible gas - Google Patents

Abstract

The utility model discloses a continuous backfire prevention device for combustible gas, and the technical problem to be solved is to make the backfire prevention device work continuously. The utility model comprises a pressure-resistant pipe body, on which a pressure-resistant cover is arranged, and water is injected into the pressure-resistant pipe body, and a pressure-resistant pipe body is provided with a An air inlet pipe extending into the water body inside the pressure-resistant pipe body. The pressure-resistant pipe body is also provided with an air outlet. A pressure relief mechanism is provided between the pressure-resistant pipe body and the pressure-resistant cover. The pressure relief mechanism includes a The upper end of the anti-pressure pipe body and the piston that can block the mouth of the anti-pressure pipe body, the pressure relief spring arranged at the upper end of the piston, the pressure relief spring in the pressure resistance cover, and the pressure relief hole arranged on the peripheral wall of the pressure resistance cover. Compared with the existing technology, the working principle of water flame retardancy, compressibility and continuous piston decompression is fully utilized, so that the device can continuously prevent backfire, and a water recycling device is also installed on the device, so as to solve the discharge of excessive condensed water and recycling issues.

Description

Continuous backfire prevention device for combustible gas

technical field

The utility model relates to a continuous backfire prevention device for combustible gas.

Background technique

Combustible gases are often used in industrial production and daily life, including: acetylene gas, liquefied natural gas, petroleum gas, coal gas and hydrogen, etc. At present, although there are many kinds of anti-tempering equipment and equipment to prevent combustible gas from flashing back, But most of them cannot work continuously, such as the anti-temper stone, which expands and blocks the channel after encountering tempering to prevent the flame from spreading in a specific direction. It has no flame retardant effect, and it must be replaced after it expands in case of fire, so it cannot be used continuously, and it will cause obstacles to the use of equipment with continuous operation requirements.

Contents of the invention

The purpose of the utility model is to provide a continuous backfire prevention device for combustible gas, and the technical problem to be solved is to make the backfire prevention device work continuously.

In order to solve the above problems, the utility model adopts the following technical solutions: a continuous anti-backlash device for combustible gas, including a pressure-resistant pipe body, and a pressure-resistant cover connected by a flange is arranged on the pressure-resistant pipe body. Water is injected into the pressure-resistant pipe body, and an air inlet pipe extending from the outside of the pressure-resistant pipe body into the water body inside the pressure-resistant pipe body is provided near the mouth of the upper end of the pressure-resistant pipe body. There is an air outlet, and a pressure relief mechanism is provided between the pressure-resistant pipe body and the pressure-resistant cover. The upper end of the piston, the pressure release spring in the anti-pressure cover and the pressure release hole arranged on the peripheral wall of the anti-pressure cover.

The mouth of the pressure-resistant pipe body described in the utility model is provided with a ring-shaped boss, and the lower end of the piston is provided with a boss closely connected with the inner hole in the boss.

The lower end surface of the convex column described in the utility model is a concave arc surface.

The pressure-resistant pipe described in the utility model is provided with a water recycling device, which includes a water circulation pipe body connected to the pressure-resistant pipe body through a connecting pipe, and a drain port is provided on the pipe body wall at the lower end of the water circulation pipe body. The lower end of the water circulation pipe body is provided with a piston seat, the interior of the piston seat is provided with a cavity communicating with the drain port, a piston hole is provided on the piston seat, and a drain piston that can block the piston hole is provided in the piston hole. The upper end of the drain piston is connected to a floating ball that is arranged in the water circulation pipe body and can float on the water surface through a connecting rod, and a drain piston column extending into the cavity is provided at the lower end of the drain piston, and the drain piston column A spring seat is arranged on the top, and a piston return spring is sleeved on the drain piston rod. The upper end of the piston return spring is pressed against the piston seat, and the lower end is against the spring seat.

The upper end of the water circulation pipe body described in the utility model is provided with a pipe body cover, and a liquid level observation tube is arranged on the pipe body cover. The body cover is connected.

The connecting pipe described in the utility model is arranged on the lower side of the pressure-resistant pipe body.

The pressure-resistant pipe body described in the utility model is provided with a bracket.

Compared with the prior art, the utility model is provided with a pressure relief mechanism between the pressure-resistant pipe body and the pressure-resistant cover, and fully exerts the water flame-retardant, compressible and piston continuous decompression working principles in the way of piston decompression, so that The device can continuously prevent backfire, and the device is also equipped with a water recycling device, so as to solve the problem of discharge and recycling when there is too much condensed water.

Description of drawings

Fig. 1 is a schematic diagram of the external structure of the utility model.

Fig. 2 is a schematic diagram of the internal structure of the utility model.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.

As shown in Fig. 1 and Fig. 2, the utility model is used for the combustible gas continuous backfire prevention device, comprises the tubular anti-pressure pipe body 1, the upper end of the anti-pressure pipe body 1 has the pipe body opening, the anti-pressure pipe body 1 The bottom is hemispherical, and the pressure-resistant pipe body 1 is provided with a pressure-resistant cover 3 connected by a flange 2. The pressure-resistant cover 3 is a hollow hemispherical structure, and water is injected into the pressure-resistant pipe body 1. The pressure pipe body 1 near the upper end of the pipe body is provided with a thread extending from the outside of the pressure pipe body 1 along the radial direction of the pressure pipe body 1 into the interior of the pressure pipe body 1 and extending axially into the water body after being bent 90 degrees. The air inlet pipe 4, the lower end of the air inlet pipe 4 extends to the bottom of the pressure-resistant pipe body 1, and the air inlet pipe 4 is connected with the gas source; the air outlet 5 is provided on the pressure-resistant pipe body 1, and the air outlet 5 is connected to the gas burner such as Stove, heating furnace, heating gun, etc. are connected;

A pressure relief mechanism is provided between the pressure-resistant pipe body 1 and the pressure-resistant cover 3. The pressure relief mechanism includes a piston 6 which is arranged in the upper end of the pressure-resistant pipe body 1 and can block the mouth of the pressure-resistant pipe body 1. 6 The upper end, the pressure relief spring 7 in the anti-pressure cover 3 and the pressure relief hole 8 arranged on the peripheral wall of the anti-pressure cover 3, and an O-shaped Sealing ring, under normal conditions, the piston 6 is blocked on the body mouth of the pressure-resistant pipe body 1, the upper end of the pressure relief spring 7 is fixed in the upper end of the pressure-resistant cover 3, and the lower end is fixed on the upper end of the piston 6; The mouth of the pipe body of 1 is provided with a circular boss 9, and the lower end of the piston 6 is provided with a boss 10 closely connected with the inner hole in the boss 9, and the lower end surface of the boss 10 is a concave arc surface; When there is tempering, the gas in the pressure-resistant pipe body 1 is fully burned to produce a large amount of expansion gas, which pushes the piston 6 to move upward and releases the pressure through the vent hole 8. After the pressure is released, the piston 6 is supported by the pressure relief spring. 7 Under the force of reset, the piston 6 is blocked again on the body opening of the pressure-resistant pipe body 1, and the expansion gas presses the water body downward to produce a small deformation to absorb part of the pressure. At the same time, since the air intake pipe is in the water body, it can prevent open flames Develop toward the gas source.

A bracket 24 is arranged on the pressure-resistant pipe body 1, and the bracket 24 is composed of four struts 25 arranged obliquely. The upper ends of the four support rods 25 are fixed to the pressure-resistant pipe body 1, and the lower side of the support rods 25 is connected and fixed to the lower side of the pressure-resistant pipe body 1 through a cross bar 26.

In order to solve the discharge and recycling of condensed water when there is too much condensed water, a water recycling device is provided next to the pressure-resistant pipe body 1. The device includes a water circulation pipe body 12 connected to the pressure-resistant pipe body 1 through a connecting pipe 11. The lower side of the pressure-resistant pipe body 1, the water in the pressure-resistant pipe body 1 will flow into the water circulation pipe body 1 through the connecting pipe 11, so that the liquid levels of the water bodies in the two are equal, and on the wall of the lower end of the water circulation pipe body 1 A drain port 13 is provided, and the drain port 13 is connected with a drain pipe or a drainage ditch, and a piston seat 14 is provided in the lower end of the water circulation pipe body 1, and a cavity 15 communicating with the drain port 13 is provided inside the piston seat 14, The middle part of the piston 14 is provided with a piston hole 27 for water supply to flow into the cavity 15, and the piston hole 27 is provided with a drain piston 16 that can block the piston hole 27. The upper end of the drain piston 16 is connected through a connecting rod 17. In the water circulation pipe body 12 and the floating ball 18 that can float on the water surface, the lower end of the drain piston 16 is provided with a drain piston column 19 extending into the cavity 15, and a spring seat is provided at the lower end of the drain piston column 19 20. A piston return spring 21 is sheathed on the drain piston column 19. The upper end of the piston return spring 21 is pressed against the piston seat 14, and the lower end is pressed against the spring seat 20.

When there is too much water in the pressure-resistant pipe body 1, the liquid level of the water rises, pushing the floating ball 18 to move upward, at this time, the connecting rod 17 pulls the drain piston 16 to be pulled out from the piston hole 27, and the piston return spring 21 is compressed , the water body in the water circulation pipe body 12 flows into the cavity 15 through the piston hole 27, and then discharges out of the water circulation pipe body 12 from the drain port 13. When the liquid level of the water body drops, the water discharge piston 16 will return due to the piston return spring 21 The position makes the drain piston 16 block up on the piston hole 27 again, thereby preventing the water body from continuing to discharge.

In order to facilitate observation of the liquid height in the water circulation pipe body 12, the upper end of the water circulation pipe body 12 is provided with a pipe body cover 22, and a liquid level observation tube 23 is arranged on the pipe body cover 22. The liquid level observation tube 23 is a transparent rubber tube, and the upper end is connected to the The pressure-resistant pipe body 1 is communicated, and the lower end of the liquid level observation tube 23 is communicated with the pipe body cover 22, and the transparent rubber hose can facilitate the observation of the internal water level of the pipe.

Claims (7)

1. one kind is used for the continuous fireproof tempering device of fuel gas, including resistance to compression pipe shaft (1), in resistance to compression pipe shaft (1) It is provided with the resistance to compression lid (3) connecting by flange (2), in described resistance to compression pipe shaft (1), be injected with water body, Be provided with resistance to compression pipe shaft (1) is near upper end pipe shaft mouth one stretch to outside resistance to compression pipe shaft (1) anti- Air inlet pipe (4) in the internal water body of pressure pipe body (1), described resistance to compression pipe shaft (1) is additionally provided with gas outlet (5) it is characterised in that：It is provided with pressure relief mechanism, institute between described resistance to compression pipe shaft (1) and resistance to compression lid 3 State pressure relief mechanism to include in resistance to compression pipe shaft (1) upper end and resistance to compression pipe shaft (1) pipe shaft mouth can be blocked Piston (6), the pressure release spring (7) in piston (6) upper end, resistance to compression lid (3) and setting Put the relief hole (8) on resistance to compression lid (3) perisporium.

2. according to claim 1 for the continuous fireproof tempering device of fuel gas it is characterised in that：Described anti- It is provided with the boss (9) of one week annular at the pipe shaft mouth of pressure pipe body (1), be provided with the lower end of piston (6) With the close-connected projection of the endoporus (10) in boss (9).

3. according to claim 2 for the continuous fireproof tempering device of fuel gas it is characterised in that：Described convex The lower surface of post (10) is the cambered surface of indent.

4. according to claim 3 for the continuous fireproof tempering device of fuel gas it is characterised in that：Described anti- It is provided with water cycle utilization device, this device is included by connecting tube (11) and resistance to compression by pressure pipe body (1) The water circulation pipe shaft (12) that pipe shaft (1) connects, is provided with the pipe shaft wall of water circulation pipe shaft (1) lower end Discharge opening (13), is provided with piston seat (14), described piston in the lower end of described water circulation pipe shaft (1) The inside of seat (14) is provided with the cavity (15) connecting with discharge opening (13), on piston seat (14) It is provided with piston hole (27), in piston hole (27), be provided with the sluicing piston (16) that can block piston hole (27), The upper end through connecting rod (17) of described sluicing piston (16) be connected in water circulation pipe shaft (12) and The ball float (18) that can bubble through the water column, is provided with the lower end of sluicing piston (16) and extends to cavity (15) Interior sluicing piston boit (19), described sluicing piston boit (19) is provided with spring base (20), is sluicing Piston return spring (21) is cased with piston boit (19), the upper end of piston return spring (21) withstands on On piston seat (14), lower end is against on spring base (20).

5. according to claim 4 for the continuous fireproof tempering device of fuel gas it is characterised in that：Described water The upper end of circulation pipe shaft (12) is provided with pipe shaft lid (22), is provided with liquid level and observes on pipe shaft lid (22) Pipe (23), the upper end of liquid level observation pipe (23) is connected with resistance to compression pipe shaft (1), liquid level observation pipe (23) Lower end connect with pipe shaft lid (22).

6. according to claim 5 for the continuous fireproof tempering device of fuel gas it is characterised in that：Described company Adapter (11) is located at the downside of resistance to compression pipe shaft (1).

7. according to claim 1 to 6 any one for the continuous fireproof tempering device of fuel gas, its feature It is：Described resistance to compression pipe shaft (1) is provided with support (24).