CN213884848U

CN213884848U - Stainless steel liquid nitrogen fire control spray gun

Info

Publication number: CN213884848U
Application number: CN202022319521.7U
Authority: CN
Inventors: 余高峰; 冯毅; 梁文强
Original assignee: Guangdong Ruijie Safety Technology Co ltd
Current assignee: Guangdong Ruijie Safety Technology Co ltd
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-08-06
Anticipated expiration: 2030-10-19

Abstract

The utility model discloses a stainless steel liquid nitrogen fire control spray gun especially relates to an use liquid nitrogen fire control spray gun of stainless steel material preparation, including into liquid, body of a gun and handle, the front end of advancing liquid passes through screw thread fixed connection with the rear end of body of a gun, be equipped with the first gasket that is used for preventing liquid nitrogen leakage between body of a gun and the feed liquor, the handle bottom is equipped with the circular lantern ring, the circular lantern ring registrates at feed liquor both ends, the feed liquor lower extreme still is equipped with the relief valve, the relief valve passes through the elbow and is connected with the feed liquor, the main part of spray gun has used stainless steel material to make, the junction of body of a gun part has used the sealed pad of polytetrafluoroethylene material preparation, good ultra-low temperature tolerance has, the conflagration that the lithium cell arouses can in time be put out effectively to this spray gun when using liquid nitrogen as fire control agent.

Description

Stainless steel liquid nitrogen fire control spray gun

Technical Field

The utility model relates to a fire control field especially relates to an use liquid nitrogen fire control spray gun of stainless steel material preparation.

Background

With people's life rhythm quickening, more and more people choose to purchase and use the storage battery car as the instrument of going out instead of walk, lead-acid batteries or lithium cell are usually used to the battery of current storage battery car, when the conflagration breaing out, the high temperature that its inside chemical reaction produced is usually followed in the battery fire, use the unable effectual conflagration of putting out of fire of conventional dry powder fire extinguisher or carbon dioxide fire extinguisher, even put out the flame, but the inside high temperature of battery also can cause the phenomenon of after combustion usually, in ordinary battery conflagration, need observe several hours to the ignition point, avoid the battery to lead to after combustion because of high temperature. Liquid nitrogen is used as an inert flame retardant, when the inert flame retardant is sprayed to flame, the effect of oxygen blocking on ignition points can be realized, the storage battery can be rapidly cooled due to the low temperature of 196 ℃ below zero, and the reignition of the battery on fire due to high temperature is avoided, so that people can rapidly transfer the battery on fire.

The existing fire-fighting spray gun is generally integrally cast and molded by using materials such as cast aluminum, cast iron and the like, and has the advantages of high production efficiency, low cost and the like, but the materials can only use conventional fire extinguishing agents such as fire fighting water, foam and the like, and cannot bear the influence caused by ultralow temperature of the liquid nitrogen fire extinguishing agent.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims at providing a novel stainless steel liquid nitrogen fire-fighting spray gun which is resistant to ultralow temperature, simple in manufacturing structure and safe and convenient in use.

In order to achieve the aim, the utility model provides a stainless steel liquid nitrogen fire control spray gun, including advancing liquid, body of a gun and handle, advance the front end of liquid with the rear end of body of a gun passes through screw thread fixed connection, the body of a gun with it is used for preventing the first gasket that the liquid nitrogen leaked to advance to be equipped with between the liquid. The fire fighting liquid supply device is characterized in that circular lantern rings are arranged at the bottom of the handle and are sleeved at two ends of the liquid inlet body, in order to avoid damage to fire fighting equipment caused by thermal expansion of liquid nitrogen remained in a fire fighting pipeline after fire fighting is finished, a pressure release valve is arranged at the lower end of the liquid inlet body and is connected with the liquid inlet body through an elbow, the liquid inlet body, the gun body, the handle and the pressure release valve are all made of stainless steel materials, nickel steel with the nickel content reaching 9% in the stainless steel materials can be used at an ultralow temperature of-196 ℃, brittleness of the stainless steel caused by ultralow temperature is avoided, damage to a spray gun in the process of fire fighting by using liquid nitrogen is avoided, the first gasket (5) is made of polytetrafluoroethylene which is used as an ultrahigh molecular material and has the characteristic of ultralow temperature resistance, and even if the temperature is at-196 ℃, the polytetrafluoroethylene can also keep the elongation of 5%, therefore, the sealing material has good ultralow-temperature sealing performance.

As a further improvement of the utility model, in order to make the spray gun adapt to various fire-extinguishing environment requirements, the front end of the gun body is provided with a nozzle for guiding the liquid nitrogen spraying direction, the inside of the gun body is provided with an adjusting screw rod for adjusting the liquid nitrogen spraying effect, the two ends of the adjusting screw rod are fixed at the axle center position of the gun body through a cross fixing frame, the front end of the adjusting screw rod is provided with an adjusting head which is conical, the front end of the gun body is provided with a sealing gasket matched with the adjusting head in shape, the sealing gasket is made of polytetrafluoroethylene material, the middle part of the adjusting screw rod is provided with an adjusting thread, the upper part of the gun body is provided with an adjusting valve, the adjusting valve is connected with an adjusting gear at the lower end through a metal rod, the adjusting gear is meshed with the adjusting thread, when the adjusting screw rod is adjusted forwards, so that the gap between the adjusting head and the nozzle is smaller, spray gun spun liquid nitrogen can be radially to make things convenient for the firefighter to put out the near ignition point of distance, and cover through on a large scale liquid nitrogen and cool down and isolated oxygen the ignition point, adjust backward when adjusting screw, adjust when the gap between head and the nozzle is great, liquid nitrogen spray gun spun liquid nitrogen can be comparatively concentrated liquid column, makes things convenient for the firefighter to rescue the ignition point far away.

As the utility model discloses further improve, the internal portion of feed liquor is equipped with the switch ball valve that is used for the switch feed liquor, the twist grip setting of switch ball valve is in the side of advancing liquid, it still is equipped with the hickey that is used for being connected with the feed liquor pipe to advance the liquid rear end.

As the utility model discloses further improve, the elbow with the junction of advancing liquid sets up the rear end of switch ball valve, the elbow with it passes through screw thread fixed connection to enter the liquid, even so after the switch ball valve on the spray gun is closed, the relief valve still can guarantee that the pressure in spray gun and the pipeline can not be too high and damage fire-fighting equipment.

As a further improvement of the utility model, the relief valve is of a hollow structure, a spring for controlling the pressure of the relief valve is arranged in the relief valve, the magnitude of the pressure relief pressure of the relief valve below the liquid can be controlled by controlling the material and the size of the spring and other related parameters, the rear end of the relief valve is provided with a relief valve piston capable of moving linearly in the relief valve, the front end of the relief valve piston is sleeved at the rear end of the spring, in order to ensure that the linear motion of the relief valve piston in the relief valve does not deviate, the outer diameter of the front end of the relief valve piston is equal to the inner diameter of the relief valve, a second gasket for sealing is arranged at the inlet of the rear end of the relief valve piston and the belonging relief valve, the second gasket is made of polytetrafluoroethylene material, the rear end of the relief valve is fixed with the elbow through threaded connection, and the spring is clamped in a groove with an opening, in order to enable the residual liquid nitrogen to be smoothly discharged from the pressure release valve, a piston through hole is further formed in the piston of the pressure release valve, one end of the piston through hole is arranged in a front groove of the piston of the pressure release valve, the other end of the piston through hole is arranged on the outer side of the rear end of the piston of the pressure release valve, when the pressure of the residual liquid nitrogen is larger than the resistance of a spring, the piston of the pressure release valve can move forwards under pressure, and the liquid nitrogen can flow to the front end of the piston of the pressure release valve through the piston through hole and then flows out of the pressure release valve after passing through a gap between a second gasket and the pressure release valve.

In order to avoid the fire fighter from freezing hands due to low temperature during the use of the spray gun, the handle is externally coated with a layer of foam material.

The utility model has the advantages that: the main part material of spray gun has used low temperature resistant stainless steel material processing to form, good ultra-low temperature tolerance has, can not lead to stainless steel material to present the fragility because the temperature crosses lowly, the seal gasket that the part junction of spray gun used makes for polytetrafluoroethylene material, good ultra-low temperature tolerance has equally, this spray gun is when using the liquid nitrogen as fire extinguishing agent, can completely cut off the oxygen that the burning needs when lowering the temperature, can be timely effectual put out the lithium cell conflagration, compare in fire water, foam and dry powder are put out a fire and are had better fire extinguishing effect.

Drawings

For the purpose of illustration, the invention is described in detail with reference to the following preferred embodiments and the accompanying drawings.

FIG. 1 is a schematic view of a stainless steel liquid nitrogen fire lance according to the present invention;

FIG. 2 is a sectional view of a stainless steel liquid nitrogen fire lance of the present invention;

fig. 3 is a cross-sectional view of the pressure relief valve of the present invention;

in the figure: 1-liquid inlet, 101-switch ball valve, 1011-rotary handle, 102-threaded interface, 2-gun body, 201-nozzle, 202-adjusting screw rod, 2021-adjusting head, 2022-adjusting thread, 203-cross fixing frame, 204-sealing gasket, 205-adjusting valve, 2051-metal rod, 2052-adjusting gear, 3-handle, 301-round lantern ring, 4-pressure release valve, 401-elbow, 402-spring, 403-pressure release valve piston, 404-second gasket, 405-piston through hole and 5-first gasket.

Detailed Description

The stainless steel liquid nitrogen fire-fighting lance of the utility model is further explained with reference to the attached drawings as follows:

as shown in fig. 1 and 2, including advancing liquid 1, body of a gun 2 and handle 3, advance the front end of liquid 1 with the rear end of body of a gun 2 passes through screw thread fixed connection, body of a gun 2 with advance and be equipped with between the liquid 1 and be used for preventing the first gasket 5 of liquid nitrogen leakage, the 3 bottoms of handle are equipped with circular lantern ring 301, circular lantern ring 301 registrates advance liquid 1 both ends, it still is equipped with relief valve 4 still to advance liquid 1 lower extreme, relief valve 4 through elbow 401 with it is connected to advance liquid 1, advance liquid 1 body of a gun 2 handle 3 relief valve 4 all uses stainless steel material to make, the use polytetrafluoroethylene of first gasket 5 makes.

The front end of the gun body 2 is provided with a nozzle 201 for guiding the liquid nitrogen injection direction, an adjusting screw 202 for adjusting the liquid nitrogen injection effect is arranged inside the gun body 2, two ends of the adjusting screw 202 are fixed at the axis position of the gun body 2 through a cross fixing frame 203, the front end of the adjusting screw 202 is provided with an adjusting head 2021, the adjusting head 2021 is conical, the front end of the gun body 2 is provided with a sealing gasket 204 matched with the adjusting head 2021 in shape, the sealing gasket 204 is made of polytetrafluoroethylene materials, the middle part of the adjusting screw 202 is provided with an adjusting thread 2022, an adjusting valve 205 is arranged above the gun body 2, the adjusting valve 205 is connected with an adjusting gear 2052 at the lower end through a metal rod 2051, and the adjusting gear 2052 is meshed with the adjusting thread 2022.

The inside switch ball valve 101 that is used for the switch feed liquor that is equipped with of liquid 1 advances, the twist grip 1011 of switch ball valve 101 sets up the side of advancing liquid 1, it still is equipped with the hickey 102 that is used for being connected with the feed liquor pipe to advance 1 rear end of liquid.

The connection part of the elbow 401 and the liquid inlet 1 is arranged at the rear end of the on-off ball valve 101, and the elbow 401 is fixedly connected with the liquid inlet 1 through threads.

The pressure release valve 4 is of a hollow structure, a spring 402 used for controlling the pressure of the pressure release valve 4 is arranged in the pressure release valve 4, a pressure release valve piston 403 capable of moving linearly in the pressure release valve 4 is arranged at the rear end of the pressure release valve 4, the front end of the pressure release valve piston 403 is sleeved at the rear end of the spring 402, the outer diameter of the front end of the pressure release valve piston 403 is equal to the inner diameter of the pressure release valve 4, a second gasket 404 used for sealing is arranged at an inlet at the rear end of the pressure release valve piston 403 and the pressure release valve 4, the second gasket 404 is made of polytetrafluoroethylene material, the rear end of the pressure release valve 4 is fixedly connected with the elbow 401 through threads, the spring 402 is clamped in a groove with an opening at the front end of the pressure release valve 4, a piston through hole 405 is further arranged on the pressure release valve piston 403, one end of the piston through hole 405 is arranged in an inner groove of the pressure release valve piston 403, the other end is arranged outside the rear end of the relief valve piston 403.

The handle 3 is externally wrapped with a layer of low temperature resistant foam material.

The utility model provides an embodiment, the rear end of the liquid inlet 1 is provided with a threaded interface 102 connected with a liquid inlet pipe, in the using process of a fire fighter, the liquid inlet pipe is firstly pulled out from a reel, after the joint of the liquid inlet pipe is dragged to a specified position, the threaded interface 102 at the rear end of a liquid nitrogen gun is fixedly connected with a loose joint nut on the liquid inlet pipe, then a switch from the liquid nitrogen gun to a liquid nitrogen tank is sequentially opened, the fire fighter holds a handle 3, the inside of the handle 3 is made of low temperature resistant stainless steel, the stainless steel can be used at the ultralow temperature of-196 ℃, and cannot be used and become brittle under the condition of the low temperature of the liquid nitrogen; in order to prevent the temperature of the stainless steel handle 3 from being too low, a layer of low-temperature-resistant foam is wrapped outside the handle 3, after liquid nitrogen is sprayed out, a firefighter can select a liquid nitrogen spraying mode according to the distance from a fire point, when the firefighter is close to the fire point, the adjusting screw 202 is adjusted forwards through the adjusting valve 205, when a gap between the adjusting head 2021 and the sealing gasket 204 is small, the liquid nitrogen sprayed out of the nozzle 201 is in a large-area flower shape, the close-distance fire point can be effectively covered, oxygen of the fire point can be isolated while the temperature is reduced, rapid fire extinguishment is realized, when the firefighter is far away from the fire point, the adjusting screw 202 is adjusted backwards through the adjusting valve 205, the liquid nitrogen sprayed out of the nozzle 201 is in a water column shape and can be sprayed to the far-distance fire point, after the fire extinguishment is finished, a switch from a liquid nitrogen tank to a liquid nitrogen spray gun needs to be sequentially closed, avoid the residual liquid nitrogen quantity too big in the feed liquor pipe. When the liquid nitrogen supply system is closed, the residual liquid nitrogen in the liquid inlet pipe absorbs heat and is gasified, and when the pressure in the pipe is increased and is larger than the elastic force which can be provided by the spring 402 in the pressure release valve 4, the pressure release valve piston 403 in the pressure release valve 4 is pressed forwards, nitrogen in the liquid inlet pipe is discharged through the pressure release valve 4, and the pressure in the pipeline is reduced.

Advance and still be equipped with the first gasket 5 that polytetrafluoroethylene material made between liquid 1 and the body of a gun 2 through threaded interconnection, the centre can bear the low temperature that the liquid nitrogen brought and do not lose sealing performance, through threaded interconnection between elbow 401 and the liquid 1, if there is the part damage in the use, then can in time pull down the change, and need not to change whole spray gun.

The utility model discloses the low temperature resistant foam on the handle, adopt a pearlite package system to form, the pearlite is one kind through the breakage by acid volcano glass matter lava, preheat, roasting inflation and the porous structure that has of making, white, granular loose material, it is capacious, the coefficient of heat conductivity is low, chemical stability is good, incombustible, nontoxic, tasteless, inhale characteristics such as sound, the tolerance range of its temperature is-200 ~800 ℃, the cladding is at the thermal insulation foam on the stainless steel handle, good thermal insulation effect has, can guarantee that stainless steel's liquid nitrogen spray gun can not cross because the temperature of handle is low excessively and frostbite the palm in the use.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a stainless steel liquid nitrogen fire control spray gun which characterized in that: including advancing liquid (1), body of a gun (2) and handle (3), advance the front end of liquid (1) with the rear end of body of a gun (2) passes through screw thread fixed connection, body of a gun (2) with advance and be equipped with between liquid (1) and be used for preventing first gasket (5) that liquid nitrogen leaked, handle (3) bottom is equipped with circular lantern ring (301), circular lantern ring (301) registrate advance liquid (1) both ends, it still is equipped with relief valve (4) still to advance liquid (1) lower extreme, relief valve (4) through elbow (401) with it is connected to advance liquid (1), advance liquid (1) body of a gun (2) handle (3) relief valve (4) all use stainless steel material to make, the use polytetrafluoroethylene of first gasket (5) makes.

2. The stainless steel liquid nitrogen fire fighting lance of claim 1, characterized in that: the front end of the gun body (2) is provided with a nozzle (201) for guiding the liquid nitrogen injection direction, an adjusting screw rod (202) for adjusting the liquid nitrogen injection effect is arranged in the gun body (2), two ends of the adjusting screw rod (202) are fixed at the axial center position of the gun body (2) through a cross fixing frame (203), the front end of the adjusting screw rod (202) is provided with an adjusting head (2021), the adjusting head (2021) is conical, the front end of the gun body (2) is provided with a sealing gasket (204) matched with the adjusting head (2021) in shape, the sealing gasket (204) is made of polytetrafluoroethylene material, the middle part of the adjusting screw rod (202) is provided with an adjusting thread (2022), an adjusting valve (205) is arranged above the gun body (2), the adjusting valve (205) is connected with an adjusting gear (2052) at the lower end through a metal rod (2051), and the adjusting gear (2052) is meshed with the adjusting thread (2022).

3. The stainless steel liquid nitrogen fire fighting lance of claim 1, characterized in that: advance liquid (1) inside be equipped with switch ball valve (101) that are used for the switch feed liquor, twist grip (1011) of switch ball valve (101) set up the side of advancing liquid (1), it still is equipped with threaded connection (102) that are used for being connected with the feed liquor pipe to advance liquid (1) rear end.

4. The stainless steel liquid nitrogen fire fighting lance of claim 3, characterized in that: the connecting part of the elbow (401) and the liquid inlet (1) is arranged at the rear end of the switch ball valve (101), and the elbow (401) is fixedly connected with the liquid inlet (1) through threads.

5. The stainless steel liquid nitrogen fire fighting lance of claim 1, characterized in that: the pressure release valve (4) is of a hollow structure, a spring (402) used for controlling the pressure of the pressure release valve (4) is arranged in the pressure release valve (4), a pressure release valve piston (403) capable of moving linearly in the pressure release valve (4) is arranged at the rear end of the pressure release valve (4), the front end of the pressure release valve piston (403) is sleeved at the rear end of the spring (402), the outer diameter of the front end of the pressure release valve piston (403) is equal to the inner diameter of the pressure release valve (4), a second gasket (404) used for sealing is arranged at the inlet of the pressure release valve piston (403) and the rear end of the pressure release valve (4), the second gasket (404) is made of polytetrafluoroethylene materials, the rear end of the pressure release valve (4) is fixedly connected with the elbow (401) through threads, the spring (402) is clamped in a groove formed in the opening at the front end of the pressure release valve (4), and a piston through hole (405) is further arranged on the pressure release valve piston (403), one end of the piston through hole (405) is arranged in an inner groove of the pressure relief valve piston (403), and the other end of the piston through hole is arranged on the outer side of the rear end of the pressure relief valve piston (403).

6. The stainless steel liquid nitrogen fire fighting lance of claim 1, characterized in that: the handle (3) is externally wrapped with a layer of foam material.