CN209229076U - A kind of pressure reducing valve - Google Patents

Abstract

It includes valve body and valve rod that the utility model, which provides a kind of pressure reducing valve, the valve body is equipped with inlet channel, outlet passageway and valve chamber, the valve chamber is respectively communicated with the inlet channel and the outlet passageway, the valve chamber penetrates through the upper surface of the valve body, the junction of the inlet channel and the valve chamber is equipped with annular projection, the aperture of the annular projection is less than the aperture of the inlet channel, the section of the annular projection is rectangular-shaped, the lower end of the valve rod is sealable to be connected to the annular projection, the lower end of the valve rod is equipped with sealing ring, the sealing ring is between the annular projection and the valve rod lower end, the sealing ring can be enclosed within the right-angle plane of the annular projection, it is easy to open in advance to solve the problems, such as that the excessive unlatching of the sealing surface of valve during air valve frequent use is difficult or sealing surface is too small.

Description

A kind of pressure reducing valve

Technical field

The utility model relates to the technical field of valve, specifically a kind of pressure reducing valve for extinguishing device.

Background technique

Pressure reducing valve, be it is a kind of can guarantee high pressure gas input gas cylinder gas reaches certain pressure in gas cylinder after depressurizing Valve or high pressure gas (extinguishing chemical) are after depressurizing with the valve of constant voltage output.As shown in Fig. 1, the pressure reducing valve packet of the prior art Include pressure cap 01, spring 02, valve rod 03, O-ring 04, gas outlet channel 05, valve body 06, sealing ring 07, flow guiding nut 08, air inlet Channel 09 and lock-screw 010, gas chamber 011 and gas passage 012；Valve rod 03 is assembled in valve body 06, and 03 lower end of valve rod is loaded onto Sealing ring 07, and be pressed on valve rod 03 with flow guiding nut 08, sealing ring 07 and valve body 06 form valve；03 upper end of valve rod is equipped with Spring 02,02 upper end of spring are connected in pressure cap 01, and pressure cap 01 is threadedly attached on valve body, and lock-screw 010 is by pressure cap 01 locks with valve body 06.The working principle of this pressure reducing valve is: ordinary circumstance lower valve is to open；When air intake passage 09 is defeated When entering high pressure gas, high pressure gas flows to gas chamber 011, gas outlet channel to gas passage 012 through valve from air intake passage 09 05, when gas pressure reaches certain value in gas outlet channel 05, gas chamber 011, valve rod 03 O V-shaped ring 04 effect under, by 03 compressed spring 02 of gas push valve rod moves up in gas chamber 011, closes valve；When from gas outlet channel 05, outflow makes gas chamber to gas When gas pressure is reduced in 011, valve rod 03 moves down opening valve under the effect of 02 pressure of spring, forms gas circulation-valve and closes Close the progress of-valve opening-gas circulation cycle；It uses outlet pressure and never exceeds set definite value, keep fluctuation constant pressure.

The pressure reducing valve of above-mentioned this structure the shortcomings that there are following two: first point, due to sealing ring in the prior art 07 is pressed on valve rod 03 by flow guiding nut 08, and sealing ring 07 and valve body 06 are inclined-plane formation valves in sealing contact, due to this valve Door is inclined-plane sealing, and therefore, valve sealing face size influences valve rod movement, and when work: 1, valve sealing face is excessive, outlet When 05 pressure of mouth is not up to setting value, the compressed spring 02 under the effect of 09 gas pressure of air intake passage of valve rod 03 is moved up, and is closed Valve, and it is easy locked valve, regardless of 05 gas pressure of gas outlet channel changes, valve is not then turned on；2, valve seal Face is too small, and when 05 gas pressure of gas outlet channel exceeds setting value, 03 ability of valve rod is under the effect of 09 gas pressure of air intake passage Compressed spring 02 moves up, and closes valve, and is easy in the case where spring 02 acts on, and valve rod 03 moves down opening valve.Second point, due to gas Room 011 is different from 012 area of gas passage, and when valve is closed: 03 upper end O-ring of valve rod, 04 compression area and 03 lower end of valve rod are close 07 compression area of seal ring is different, causes valve rod 03 to be pressurized unevenness without rule action, makes pressure transient at gas outlet 05.

Utility model content

The main purpose of the utility model is to provide a kind of pressure reducing valve, be used for environment temperature -20 DEG C~+50 DEG C, The high pressure gas (extinguishing chemical) that can be rapidly input, with constant voltage output, eliminates usual high pressure gas (extinguishing chemical) input after depressurizing Superpressure brought by downstream connection equipment is impacted；Extinguishing chemical can be pushed to release out of container with constant pressure again, make to go out Fiery agent can obtain bigger kinetic energy within effective time, keep higher (constant) flow velocity, extend extinguishing chemical conveying distance.

To achieve the above objectives, the technical solution adopted in the utility model are as follows: a kind of pressure reducing valve includes valve body and valve rod.

The valve body is equipped with inlet channel, outlet passageway and valve chamber, and the valve chamber is respectively communicated with the inlet channel and institute State outlet passageway, the valve chamber penetrates through the upper surface of the valve body, and the junction of the inlet channel and the valve chamber is equipped with ring Shape protrusion, the aperture of the annular projection are less than the aperture of the inlet channel, and the section of the annular projection is rectangular-shaped.

The lower end of the valve rod is sealable to be connected to the annular projection, and the lower end of the valve rod is equipped with sealing ring, institute Sealing ring is stated between the annular projection and the valve rod lower end, the sealing ring can be enclosed within the straight of the annular projection Angle plane, to form sealing surface, solve valve during air valve frequent use the excessive unlatching of sealing surface it is difficult or Person's sealing surface is too small to be easy the problem of opening in advance.

Preferably, the upper end of the valve rod is located at the valve chamber, the lower end of the valve rod be located in the inlet channel and Lower than the annular projection, form gas chamber between the valve rod and the inner wall of the valve chamber, the lower end of the valve rod and it is described into Chamber volume is formed between gas vias inner walls, the gas volume of the gas chamber is equal to the volume of the volume indoor gas, is solved Certainly in the closed inlet channel of the sealing ring, the sealing ring is due to by from the gas chamber and the chamber volume Pressure it is different and caused by outlet pressure shakiness problem.

Preferably, the pressure reducing valve further comprises pressure cap, spring and connector, and the pressure cap is connected through a screw thread described The upper end of valve body, the pressure cap are equipped with cavity open at one end, and the cavity is connected to the valve chamber, and the upper surface of the connector is The bottom surface of cone cell, the pressure cap is equipped with cone cell groove, and the groove adapts to the upper surface of the connector, and the spring is located at institute It states in the valve chamber, the upper end of the spring connects the lower end of the connector, and the lower end of the spring connects the upper of the valve rod End can solve when rotating the pressure cap by being equipped with the connector between the pressure cap and the spring from described The resistance of spring will not be driven in the process spring described in for rotating the pressure cap and rotate together.

Preferably, the cone cell groove of the pressure cap and the pressure cap coaxial line.

Preferably, the upper end of the spring is socketed on the lower end of the connector.

Preferably, the lower end of the spring is socketed on the upper end of the valve rod.

Preferably, the pressure cap is equipped with lock-screw, and the lock-screw is connected to the valve body, passes through lock-screw Setting, can solve the mistake rotational problems in the pressure cap.

Preferably, the cavity of the pressure cap is socketed on the outer wall of the valve chamber, and the sealing ring is fixed by flow guiding nut.

Detailed description of the invention

Fig. 1 is the sectional view according to pressure reducing valve in the prior art；

Fig. 2 is the sectional view of a preferred embodiment according to the present utility model.

Specific embodiment

It is described below for disclosing the utility model so that those skilled in the art can be realized the utility model.It retouches below Preferred embodiment in stating is only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.

A kind of pressure reducing valve includes valve body 1 and valve rod 2, and the valve body 1 is equipped with inlet channel 11, outlet passageway 12 and valve chamber 13, the valve chamber 13 is respectively communicated with the inlet channel 11 and the outlet passageway 12, and the valve chamber 13 penetrates through the valve body 13 Upper surface, the junction of the inlet channel 11 and the valve chamber 13 is equipped with annular projection 14, the hole of the annular projection 14 Diameter is less than the aperture of the inlet channel 11, and the section of the annular projection 14 is rectangular-shaped.

The upper end of the valve rod 2 is located at the valve chamber 13, and the lower end of the valve rod 2 is located in the inlet channel 11 and low In the annular projection 14, the lower end of the valve rod 2 is sealable to be connected to the annular projection 14, the lower end of the valve rod 2 Equipped with sealing ring 21, for the sealing ring 21 between 2 lower end of the annular projection 14 and the valve rod, the sealing ring 21 is logical It is fixed to cross flow guiding nut 22, the sealing ring 21 can be enclosed within the right-angle plane of the annular projection 14, so that sealing surface is formed, The excessive unlatching of sealing surface for solving valve during air valve frequent use is difficult or sealing surface is too small is easy to open in advance The problem of opening.

Wherein, between the valve rod 2 and the inner wall of the valve chamber 13 formed gas chamber 7, the lower end of the valve rod 2 and it is described into Chamber volume 8 is formed between 11 inner wall of gas channel, the gas volume of the gas chamber 7 is equal to the volume of gas in the chamber volume 8, obtains To solve in the 21 closed inlet channel 11 of sealing ring, the sealing ring 21 is due to by from 7 He of gas chamber The pressure of the chamber volume 8 it is different and caused by outlet pressure shakiness problem.

Wherein, the pressure reducing valve further comprises pressure cap 3, spring 4 and connector 5, and the pressure cap 3 is connected through a screw thread institute The upper end of valve body 1 is stated, the pressure cap 3 is equipped with cavity 31 open at one end, and the cavity 31 is connected to the valve chamber 13, the connector 5 upper surface is cone cell, and the bottom surface of the pressure cap 3 is equipped with cone cell groove 32, and the groove 32 adapts to the upper end of the connector 5 Face, the spring 4 are located in the valve chamber 13, and the upper end of the spring 4 connects the lower end of the connector 5, the spring 4 Lower end connect the upper end of the valve rod 2, by being equipped with the connector 5 between the pressure cap 3 and the spring 4, can solve Resistance certainly when rotating the pressure cap 3 from the spring 4, the process spring 4 described in for rotating the pressure cap 3 will not It is driven and rotates together.

Wherein, the cone cell groove 32 of the pressure cap 3 and 3 coaxial line of pressure cap.

Wherein, the upper end of the spring 4 is socketed on the lower end of the connector 5.

Wherein, the lower end of the spring 4 is socketed on the upper end of the valve rod 2.

Wherein, the pressure cap 3 is equipped with lock-screw 9, and the lock-screw 9 is connected to the valve body 1, passes through lock-screw 9 setting can solve the mistake rotational problems of the pressure cap 3.

Wherein, the cavity 31 of the pressure cap 3 is socketed on the outer wall of the valve chamber 13.

In use, the high-pressure extinction gas in container bottle generates the lower end of the valve rod 2 and upwards pressure, the spring The upper end of 4 pairs of valve rods generates downward pressure, and high-pressure extinction gas flows through the chamber volume 8 from the inlet channel 11 It is flowed out with after gas chamber 7 by the outlet passageway 12, when the high-pressure gas pressure in container bottle increases suddenly, pushes the valve rod 2 overcome the elastic force of the spring 4 to move upwards along the valve chamber 13, and the lower end of the valve rod 2 is closed by the sealing ring 21 In the right-angle plane of the annular projection 14, so that high-pressure extinction gas be blocked to flow into the outlet passageway 12；It can lead to usually It crosses and rotates the pressure cap 3 to adjust the spring 4 to the pressure of 2 upper end of valve rod, when the pressure cap 3 rotation, the pressure Cap 3 is rotated relative to the upper surface of the connector 5, so that the connector 5 be made not rotate with the pressure cap.

Basic principles, main features, and advantages of the present invention has been shown and described above.Current row The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments Only the principles of the present invention, the utility model also has respectively on the premise of not departing from the spirit and scope of the utility model Kind changes and improvements, these changes and improvements are both fallen in the range of claimed invention.The requires of the utility model Protection scope defined by appended claims and its equivalent.

Claims (8)

1. a kind of pressure reducing valve, which is characterized in that including valve body and valve rod, the valve body is equipped with inlet channel, outlet passageway and valve Chamber, the valve chamber are respectively communicated with the inlet channel and the outlet passageway, and the valve chamber penetrates through the upper surface of the valve body, institute The junction for stating inlet channel and the valve chamber is equipped with annular projection, and the aperture of the annular projection is less than the inlet channel Aperture, the section of the annular projection be it is rectangular-shaped, the lower end of the valve rod is sealable to be connected to the annular projection, described The lower end of valve rod is equipped with sealing ring, and the sealing ring is between the annular projection and the valve rod lower end, the sealing ring The right-angle plane of the annular projection can be enclosed within.

2. pressure reducing valve according to claim 1, which is characterized in that the upper end of the valve rod is located at the valve chamber, the valve The lower end of bar is located in the inlet channel and lower than the annular projection, is formed between the valve rod and the inner wall of the valve chamber Gas chamber, forms chamber volume between the lower end of the valve rod and the inlet channel inner wall, the gas volume of the gas chamber is equal to institute State the volume of volume indoor gas.

3. pressure reducing valve according to claim 2, which is characterized in that the pressure reducing valve further comprise pressure cap, spring and Connector, the pressure cap are connected through a screw thread the upper end of the valve body, and the pressure cap is equipped with cavity open at one end, and the cavity connects Lead to the valve chamber, the upper surface of the connector is cone cell, and the bottom surface of the pressure cap is equipped with cone cell groove, and the groove adapts to institute The upper surface of connector is stated, the spring is located in the valve chamber, and the upper end of the spring connects the lower end of the connector, the bullet The lower end of spring connects the upper end of the valve rod.

4. pressure reducing valve according to claim 3, which is characterized in that the cone cell groove and the pressure cap of the pressure cap are coaxial Line.

5. pressure reducing valve according to claim 4, which is characterized in that the upper end of the spring is socketed under the connector End.

6. pressure reducing valve according to claim 5, which is characterized in that the lower end of the spring is socketed on the upper of the valve rod End.

7. pressure reducing valve according to claim 6, which is characterized in that the pressure cap is equipped with lock-screw, the lock-screw It is connected to the valve body.

8. according to the pressure reducing valve any in claim 3-7, which is characterized in that the cavity of the pressure cap is socketed on the valve The outer wall of chamber, the sealing ring are fixed by flow guiding nut.