CN212536715U

CN212536715U - Gas proportional combination valve

Info

Publication number: CN212536715U
Application number: CN202020136210.4U
Authority: CN
Inventors: 程益冰; 余健; 罗燊家; 杜剑明; 任立权
Original assignee: Shaoxing Erco Electric Co ltd
Current assignee: Shaoxing Erco Electric Co ltd
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2021-02-12
Anticipated expiration: 2030-01-20

Abstract

The utility model discloses a gas proportional combination valve, which comprises a cut-off valve, a proportional valve, a shell, an air inlet, an air outlet, a gas pipeline and a flow-limiting valve; the proportional valve comprises a proportional coil arranged above the shell, a sealing structure arranged below the proportional coil, a transmission structure arranged on one side of the sealing structure and a baffle plate arranged below the transmission structure, when the current in the proportional coil changes, the baffle plate is driven to ascend through the sealing structure and the transmission structure, and the gas pipeline is opened; the utility model discloses a gas leakage has effectively been avoided in seal structure, transmission structure, restriction valve and proportional valve's setting, has strengthened the security, convenient to use simple structure simultaneously, low in manufacturing cost, production efficiency is high, and the output quantity is more accurate.

Description

Gas proportional combination valve

Technical Field

The utility model belongs to the technical field of gas equipment, especially, relate to a gas proportional combination valve.

Background

The gas valve is a safety matching device for controlling technical parameters such as gas pressure, flow and the like in gas pipeline engineering, is used for cutting off, connecting and adjusting gas in pipelines, has good control characteristics and closing sealing performance, and is suitable for various gas medium pipelines such as city gas, liquefied petroleum, gas, natural gas, oxygen and the like. The gas valve among the prior art is equipped with the single solenoid valve that cuts off more than two at least to prevent that gas from leaking, adopt the mode of two cuts off can effectively prevent gas leakage occurence of failure, nevertheless there is the defect yet: the double-cut-off gas valve has a complex structure and more components, so that the manufacturing cost is increased, the production efficiency is reduced, and the output quantity is not accurate enough.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome prior art not enough, provide a gas proportional combination valve that the precision is high, with low costs.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a gas proportional combination valve comprises a stop valve, a proportional valve arranged on one side of the stop valve, a shell arranged outside the stop valve and the proportional valve, an air inlet arranged at one end of the shell, an air outlet arranged at the other end of the shell, a gas pipeline arranged in the shell and a flow limiting valve arranged in the gas pipeline; the proportional valve comprises a proportional coil arranged above the shell, a sealing structure arranged below the proportional coil, a transmission structure arranged on one side of the sealing structure and a baffle plate arranged below the transmission structure, when the current in the proportional coil changes, the baffle plate is driven to ascend through the sealing structure and the transmission structure, and the gas pipeline is opened; through seal structure, the transmission structure, the setting of restriction valve and proportional valve, gas leakage has effectively been avoided through seal structure, the security has been strengthened, setting through the restriction valve, the inside atmospheric pressure increase that leads to has avoided the gas input too fast, the condition that the output quantity that causes increases takes place, convenient to use simple structure simultaneously, low in manufacturing cost, high production efficiency, the output quantity is more accurate, thereby the size in external current input's size is passed through in setting through the proportional valve, when the electric current increases, proportional coil's power increase, thereby open the separation blade through the transmission structure, thereby play the output of control gas valve, the structure is more stable safe output quantity more accurate.

The sealing structure comprises a first sealing element arranged on the shell, a first push block arranged above the first sealing element, a first cavity body, a second push block, a first boss and a second sealing element, wherein the first elastic element arranged in the radial direction of the first push block is arranged below the first sealing element; the second push block is pushed by the first push block in a mode of extruding the sealing piece, the sealing piece is isolated between the first push block and the second push block, the risk that fuel gas leaks from the inside of a mechanical structure is effectively avoided, and the possibility of poisoning and even explosion of personnel caused by fuel gas leakage is reduced.

The transmission structure comprises a second cavity arranged in the shell, a first rack arranged in the second cavity, a third elastic part arranged below the rack, a second rack arranged in the cavity, a third cavity arranged below the second rack, a second lug arranged in the third cavity, a fourth elastic part arranged above the second lug, and a gear arranged between the first rack and the second rack; the second push block is utilized to extrude the first rack, so that the first rack moves downwards, the gear rotates, the second rack is driven to move upwards, the baffle is taken up, and the gas pipe is communicated for gas conveying.

First sealing member reaches all be equipped with the gasket on the second sealing member first lug drives the in-process of second lug and produces certain degree of wearing and tearing unavoidably, through the mode that sets up the gasket, has avoided the damage of first sealing member or second sealing member that leads to because first lug contacts with the second lug in the motion process to the dangerous emergence of the gas leakage that leads to.

A gap is reserved between the second push block and the second sealing piece, and a space is reserved between the second push block and the second sealing piece, so that the phenomenon that current existing at the moment when the proportional valve is switched on is unstable is avoided, the phenomenon that the current is overlarge at the first moment and the gas output quantity is overlarge, the second sealing piece is torn by the instantaneous large force, and the transmission structure is seriously abraded between gears due to the instantaneous too-fast speed.

The cut-off valve comprises a common coil arranged above the shell, a first air cavity arranged below the common coil, a telescopic rod arranged below the common coil, a sealing sheet arranged on the lower end surface of the rod, a fifth elastic piece arranged above the sealing sheet, a fourth cavity arranged below the first air cavity, a film arranged in the fourth cavity, a sixth elastic piece arranged below the film and a cushion arranged below the common coil; the air inlet is plugged up to the closing plate under the effect of fifth spring when ordinary coil does not go on electric, thereby when equipment began operation, thereby ordinary coil circular telegram produces strong magnetic field, thereby attract the closing plate rebound, the unblock is to the closure of air inlet, the film will be the rebound unblock under the effect of atmospheric pressure after first gas intracavity gas atmospheric pressure reaches the certain degree, the setting of this cavity has strengthened the continuity of gas valve, when having reduced and opened, the time that needs wait.

The flow limiting valve comprises a fifth cavity arranged below the fourth cavity, a moving block arranged in the fifth cavity, a seventh elastic piece arranged above the moving block and an eighth elastic piece arranged below the moving block, the flow limiting valve is arranged to effectively control the flow not to be overlarge, when extruded gas passes through the through hole of the baffle plate, the output quantity is more normal, the gas consumption is larger, the impact on the baffle plate is larger, the service life of the device is prolonged due to the arrangement of the flow limiting valve, and meanwhile, the output of the gas is more stable and accurate.

The second air cavity is arranged in the air outlet; the second air cavity is rectangular; thereby the separation blade will upwards remove to ventilate under the drive of proportion coil, if use square pipeline then the output increment of separation blade motion in the different unit distance is the same, has effectively strengthened the precision of proportional valve to output volume control.

The utility model discloses a gas leakage has effectively been avoided in seal structure, transmission structure, restriction valve and proportional valve's setting, has strengthened the security, convenient to use simple structure simultaneously, low in manufacturing cost, production efficiency is high, and the output quantity is more accurate.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a top view of the present invention.

Fig. 3 is a cross-sectional view taken along line a-a of fig. 2.

Fig. 4 is a perspective sectional view taken along line a-a of fig. 2.

Fig. 5 is an enlarged schematic view of a portion a of fig. 4.

Fig. 6 is an enlarged schematic view of B in fig. 4.

Fig. 7 is an enlarged schematic view of C in fig. 4.

Fig. 8 is a partially enlarged schematic view of fig. 7.

Detailed Description

As shown in fig. 1, a gas proportional combination valve comprises a shut-off valve 1, a proportional valve 2, a housing 3, a gas inlet 4, a gas outlet 5, a gas pipeline 6 and a flow limiting valve 7; the shut-off valve 1 and the proportional valve 2 are arranged on one side of the shut-off valve, the shell 3 is arranged on the outer sides of the shut-off valve and the proportional valve, the air inlet 4 is arranged at one end of the shell, the air outlet 5 is arranged at the other end of the shell, the gas pipeline 6 is arranged in the shell, and the flow-limiting valve 7 is arranged in the gas pipeline; the proportional valve 2 comprises a proportional coil 21, a sealing structure 22, a transmission structure 23 and a baffle plate 24; the proportional coil 21 is arranged above the shell, and the proportional coil is in the prior art and is not described herein again; sealing structure 22 locates the proportion coil below, transmission structure 23 locates seal structure one side, baffle 24 locates the transmission structure below, when the proportion coil internal current changes then through seal structure with the transmission structure drives the baffle rises, the gas pipeline is opened.

The sealing structure 22 comprises a sealing member 221, a first pushing block 222, a first elastic member 223, a first cavity 224, a second pushing block 225, a first boss 226, a second elastic member 227 and a second sealing member 228; the sealing element 221 is arranged on the shell 3, is made of soft materials such as rubber and has good sealing performance, and the possibility of personnel poisoning and even explosion caused by leakage of gas from the inside of the machine is effectively avoided; first ejector pad 222 is located first sealing member top, and first elastic component 223 is located first ejector pad is radial, and first ejector pad is a thin cylindrical piece and connects short cylindrical structure, and first elastic component links to each other with thin cylindrical piece, is located short cylindrical radial, stable in structure, presses the high resilience of accuracy. First cavity 224 is located first sealing member below is a cylinder, and second ejector pad 225 is located in the cavity, and first boss 226 is located the second ejector pad is radial, and second elastic component 227 locates the second ejector pad is radial, and the second ejector pad is a cylinder, and first lug is then an oblate piece with the same axle center with the second ejector pad, and the second spring links to each other with above-mentioned oblate piece, is extruding second ejector pad rebound, and second sealing member 228 is located the second ejector pad below, second sealing member and the same second ejector pad below that is located of first sealing member structure play double-deck insurance effect.

The transmission structure 23 comprises a second cavity 231, a first rack 232, a third elastic member 233, a second rack 234, a third cavity 235, a second projection 236, a fourth elastic member 237 and a gear 238; a second cavity 231 is arranged in the shell, a first rack 232 is arranged in the second cavity, a third elastic member 233 is arranged below the rack, a second rack 234 is arranged in the cavity, a third cavity 235 is arranged below the second rack, a second lug 236 is arranged in the third cavity, a fourth elastic member 237 is arranged above the second lug, a gear 238 is arranged between the first rack and the second rack, one L-shaped side of the first rack is arranged below the second push block, the lower side of the first rack is supported by a third spring member, a plurality of teeth are distributed on the outer side of the other side of the first rack, the teeth on the first rack are meshed with the gear, when the second push block moves downwards, the first rack moves downwards to drive the gear to rotate clockwise, the second rack is meshed with the gear, when the gear rotates clockwise, the first rack moves upwards under the action of the gear, the second lug is connected at the middle position of the second rack, the third cavity is used for providing and limiting the position of the second bump, and the fourth elastic piece is arranged on the second bump and pushes the whole second rack downwards, so that the effect of resetting and closing the fuel gas channel is achieved.

Gaskets 229 are arranged on the first sealing element and the second sealing element; the gasket is for adhesion or link firmly on the sealing member, is located the sealing member middle side, with the position that first ejector pad and second ejector pad correspond, uses the rubber material to reduce the condition emergence of the damaged wearing and tearing of sealing member that the effort led to between the two.

A gap is reserved between the second push block and the second sealing piece, a space is reserved between the second push block and the second sealing piece, the phenomenon that current existing at the moment when the proportional valve is switched on is unstable is avoided, the phenomenon that the current is overlarge at the first moment and the gas output is overlarge, the second sealing piece is torn by the instantaneous large force, and the transmission structure is seriously abraded between gears due to the instantaneous too fast speed.

The cut-off valve 1 comprises a common coil 11, a first air cavity 12, an expansion rod 13, a sealing sheet 14, a fifth elastic piece 15, a fourth cavity 16, a soft sheet 17, a sixth elastic piece 18 and a soft pad 19; ordinary coil 11 is located the casing top, and first air cavity 12 is located ordinary coil below, and telescopic link 13 is located ordinary coil below, the telescopic link is located inside the ordinary coil, for plastics or ceramic member that can not be attracted by the magnetite, closing plate 14 is located the lower terminal surface closing plate of pole is flat cylinder for shelter from the air inlet, has effectively blockked up first cavity and air inlet under the effect of spring, has formed seal structure, and the material is for the material that can be attracted by magnetic force such as magnetite. Fifth elastic component 15 is located the closure piece top, fourth cavity 16 are located first cavity below, film 17 are located in the fourth cavity, the film is the soft material of rubber class etc, and sixth elastic component 18 is located the film below, fourth cavity are the structure with first cavity intercommunication to inside radius is greater than the export radius, and with the export jam when atmospheric pressure in first cavity is not enough, avoid because the air supply strengthens suddenly because external condition, and the first cavity atmospheric pressure increase that leads to produces the condition of gas leakage and takes place, has avoided dangerous condition to take place, and cushion 19 is located ordinary coil below cushion area is greater than first cavity, and is good for soft rubber materials leakproofness.

The flow limiting valve 7 comprises a fifth cavity 71, a moving block 72, a seventh elastic piece 73 and an eighth elastic piece 74; a fifth cavity 71 is arranged below the fourth cavity, a moving block 72 is arranged in the fifth cavity, a seventh elastic element 73 is arranged above the moving block, and an eighth elastic element 74 is arranged below the moving block; the fifth wall body is in a shape of a convex middle section of a cylinder, the moving block is in a shape of a flat block with two sections of cylinders connected up and down, when the moving block is not under the action of air pressure, the upper surface of the moving block is connected with the fifth cavity, when the internal air is too large, the moving block is pressed downwards, and the lower surface of the moving block is close to the lower end of the cavity, so that the ventilation volume is reduced, the effect of limiting the flow is achieved, the situation that the gas throughput is increased under the condition of the same through hole due to the fact that the air pressure is too large is avoided, the accuracy is improved, the impact on the blocking piece is reduced, and the service.

A second air chamber 51 provided in the air outlet 5; the second air cavity is rectangular.

The first to eighth elastic members are all springs.

The specific working principle is as follows,

when the coil is electrified, the common coil sucks the sealing sheet, so that a channel of the gas inlet is opened, the gas enters the first gas cavity, the gas pressure in the first gas cavity is increased along with the increase of the gas, the flexible sheet is pushed open, the gas enters the fifth cavity below, the moving block moves downwards under the action of the gas, and when the gas flow is too large, the downward movement amount of the moving block is increased, so that the gas outlet amount is reduced, and the gas is subjected to certain current limiting.

When the proportional coil is electrified, the proportional coil extrudes the first push block downwards, the first push block pushes the second push block to move downwards against the sealing piece, the second push block moves downwards to extrude the first rack, the gear is driven by the downward movement of the first rack to rotate clockwise, the second rack meshed with the gear moves upwards under the action of the gear, and therefore the blocking of the baffle below to fuel gas is opened. When the current is increased, the downward displacement of the first bump is increased, so that the upward displacement of the baffle is increased, and vice versa.

It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims

1. A gas proportional combination valve comprises a stop valve (1), a proportional valve (2) arranged on one side of the stop valve, a shell (3) arranged on the outer sides of the stop valve and the proportional valve, an air inlet (4) arranged at one end of the shell, an air outlet (5) arranged at the other end of the shell, a gas pipeline (6) arranged in the shell, and a flow limiting valve (7) arranged in the gas pipeline; the method is characterized in that: the proportional valve (2) comprises a proportional coil (21) arranged above the shell, a sealing structure (22) arranged below the proportional coil, a transmission structure (23) arranged on one side of the sealing structure, and a baffle (24) arranged below the transmission structure; when the current in the proportional coil changes, the baffle is driven to ascend through the sealing structure and the transmission structure, and the gas pipeline is opened.

2. The gas proportional combination valve of claim 1, wherein: the sealing structure (22) comprises a first sealing element (221) arranged on the shell (3), a first push block (222) arranged above the first sealing element, a first elastic piece (223) arranged in the radial direction of the first push block, a first cavity (224) arranged below the first sealing element, a second push block (225) arranged in the first cavity, a first boss (226) arranged in the radial direction of the second push block, a second elastic piece (227) arranged in the radial direction of the second push block and a second sealing element (228) arranged below the second push block.

3. The gas proportional combination valve of claim 1, wherein: the transmission structure (23) comprises a second cavity (231) arranged in a shell, a first rack (232) arranged in the second cavity, a third elastic part (233) arranged below the rack, a second rack (234) arranged in the cavity, a third cavity (235) arranged below the second rack, a second bump (236) arranged in the third cavity, a fourth elastic part (237) arranged above the second bump, and a gear (238) arranged between the first rack and the second rack.

4. The gas proportional combination valve of claim 2, wherein: gaskets (229) are arranged on the first sealing element and the second sealing element.

5. The gas proportional combination valve of claim 2, wherein: and a gap is reserved between the second push block and the second sealing element.

6. The gas proportional combination valve of claim 1, wherein: the stop valve (1) comprises a common coil (11) arranged above the shell, a first air cavity (12) arranged below the common coil, a telescopic rod (13) arranged below the common coil, a sealing sheet (14) arranged on the lower end face of the rod, a fifth elastic part (15) arranged above the sealing sheet, a fourth cavity (16) arranged below the first air cavity, a film (17) arranged in the fourth cavity, a sixth elastic part (18) arranged below the film and a cushion (19) arranged below the common coil.

7. The gas proportional combination valve of claim 6, wherein: the flow limiting valve (7) comprises a fifth cavity (71) arranged below the fourth cavity, a moving block (72) arranged in the fifth cavity, a seventh elastic piece (73) arranged above the moving block and an eighth elastic piece (74) arranged below the moving block.

8. The gas proportional combination valve of claim 1, wherein: a second air cavity (51) arranged in the air outlet (5); the second air cavity is rectangular.