CN111288209A

CN111288209A - Gas proportional valve

Info

Publication number: CN111288209A
Application number: CN202010257374.7A
Authority: CN
Inventors: 李志斌; 梁宝来; 杜剑明; 顾伟
Original assignee: Shaoxing Erco Electric Co ltd
Current assignee: Shaoxing Erco Electric Co ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-06-16

Abstract

The invention relates to a gas proportional valve, which comprises a proportional valve, wherein the proportional valve comprises a housing, a big and small fire adjusting device is connected in the housing, a valve rod is limited in the big and small fire adjusting device, two reed frames are arranged in the housing, reeds are fixed on the two reed frames, a first coil assembly is fixed between the two reeds, a permanent magnet assembly sleeved outside the first coil assembly is arranged between the two reed frames, a channel is formed in each of the reed frames, the reeds and the first coil assembly, and the valve rod penetrates through the channel and is fixedly connected with the first coil assembly; the advantages are that: the permanent magnet assembly is arranged on the outer side of the coil assembly, so that a magnetic circuit of the permanent magnet assembly is a closed-loop magnetic circuit, the generation of a magnetic flux leakage phenomenon is avoided, and the adjusting performance of the proportional valve is better; the lead is welded on the reed to replace the power supply connecting end of the reed, so that the product cost can be effectively reduced, and meanwhile, the wiring arrangement is convenient; the safety performance of the gas proportional valve can be improved by adopting the stop valve in a single-coil double-cut-off form.

Description

Gas proportional valve

Technical Field

The invention relates to the field of gas valves, in particular to a gas proportional valve.

Background

The gas proportional 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 proportional valve generally comprises a flow channel for guiding gas, and a stop valve for opening and closing the flow channel and a proportional valve for adjusting the opening degree of the flow channel are arranged on the flow channel. In the proportional valve in the prior art, part of the permanent magnet assemblies are arranged on the inner side of the coil, and part of the permanent magnet assemblies are arranged on the outer side of the coil, so that magnetic field matching between the coil and the permanent magnet assemblies can be realized, but the defect of magnetic leakage also exists, and the adjustment performance of the proportional valve is greatly influenced.

Disclosure of Invention

The invention aims to provide a fuel gas proportional valve to improve the adjusting performance of the proportional valve.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the utility model provides a gas proportional valve, includes the proportional valve, and the proportional valve includes the housing, even has big fire adjusting device, and it has the valve rod to limit in the big fire adjusting device, be equipped with two reed framves in the housing, all be fixed with the reed on two reed framves, be fixed with coil assembly one between two reeds, be equipped with the cover between two reed framves and establish the permanent magnet subassembly outside coil assembly one, a passageway has been seted up on reed frame, reed and the coil assembly one, the valve rod pass this passageway and with a coil assembly rigid coupling.

Further, the reed comprises an outer ring fixedly connected with the reed frame, an inner ring fixedly connected with the coil assembly and an elastic part used for connecting the outer ring and the inner ring, the elastic part comprises a plurality of arc-shaped strips arranged along the circumferential direction of the inner ring, one ends of the arc-shaped strips are fixed with the outer ring of the reed, and the other ends of the arc-shaped strips are fixed with the inner ring of the reed.

Furthermore, the reed frame is provided with an outer ring fixing bulge, and the outer ring of the reed is provided with an outer ring fixing hole matched with the outer ring fixing bulge.

Furthermore, an inner ring fixing bulge is arranged on the first coil component, and an inner ring fixing hole matched with the inner ring fixing bulge is formed in the inner ring of the reed.

Furthermore, a plurality of positioning grooves are formed in the inner wall of the housing, and a first positioning protrusion matched with the positioning grooves is formed in the outer wall of the reed frame.

Further, permanent magnet assembly includes two symmetrical arrangement's magnetic conduction frame, and magnetic conduction frame includes that one set establishes the hollow cylinder outside coil assembly, and the one end of hollow cylinder outwards extends and forms the ring piece, the outer cover of hollow cylinder is equipped with permanent magnet and magnetic conduction piece, and the permanent magnet is located between ring piece and the magnetic conduction piece, be equipped with the bulge loop that the card was gone into in the hollow cylinder on the reed frame.

Furthermore, the ring pieces are provided with positioning holes and positioning protrusions II, and the positioning holes and the positioning protrusions on the two ring pieces are matched with each other.

Further, be equipped with the power supply terminal on the housing, the rigid coupling has the outer wire that is used for being connected with the power supply terminal on the reed, coil pack one includes the coil and the winding of winding outside the coil, and the coil outer wall is located the both sides of winding and has all seted up the wire casing, and the interior wire has been laid to the wire casing, the one end and the winding of interior wire are connected, and the other end is connected with the reed.

Furthermore, a lead leading-out hole and/or a lead leading-out groove for leading out a lead conveniently are formed in the reed frame.

Further, including the trip valve, the trip valve includes the trip valve body, and this internal quiet iron core that is equipped with of trip valve moves the iron core on, on move the iron core and stretch out the one end of trip valve body and be fixed with the adapter sleeve, be equipped with sealing on the adapter sleeve outer wall, be equipped with answer spring one between sealing and the trip valve body, be equipped with both ends opening and the hollow iron core that moves down in the adapter sleeve, be equipped with the connecting rod in moving the iron core down, the one end of connecting rod and last move and be equipped with answer spring two between the iron core, the other end of connecting rod stretches out the adapter sleeve and is equipped.

The invention has the advantages that:

1. the permanent magnet assembly is arranged on the outer side of the coil assembly, so that a magnetic circuit of the permanent magnet assembly is a closed-loop magnetic circuit, the generation of a magnetic flux leakage phenomenon is avoided, and the adjusting performance of the proportional valve is better;

2. the lead is welded on the reed to replace the power supply connecting end of the reed, so that the product cost can be effectively reduced, and meanwhile, the wiring arrangement is convenient;

3. the safety performance of the gas proportional valve can be greatly improved by adopting the stop valve in a single-coil double-cut-off form.

Drawings

FIG. 1 is a schematic sectional view of a gas proportional valve in an embodiment;

FIG. 2 is a schematic cross-sectional view of a proportional valve in an embodiment;

FIG. 3 is an exploded schematic view of the proportional valve of the embodiment;

FIG. 4 is a three-dimensional schematic view of a proportional valve in an embodiment;

FIG. 5 is a three-dimensional schematic view of a reed cage according to an embodiment;

FIG. 6 is a schematic plan view of a leaf spring in the embodiment;

FIG. 7 is a three-dimensional view of another perspective of the embodiment of the reed cage;

FIG. 8 is a schematic three-dimensional structure of the magnetic frame in the embodiment

FIG. 9 is a schematic cross-sectional view of the magnetic frame of the embodiment;

FIG. 10 is an enlarged view of portion A of FIG. 1;

FIG. 11 is a schematic three-dimensional configuration of a coil in the example;

FIG. 12 is a schematic diagram showing a three-dimensional structure of the coil assembly I, the permanent magnet assembly, the spring frame and the spring plate after being connected in the embodiment;

FIG. 13 is a schematic three-dimensional configuration of a shut valve in the embodiment;

description of the reference symbols

The valve seat 1, an air inlet channel 11, an air outlet channel 12, an air inlet I13, an air inlet II 14, a flow channel 15, a proportional valve port 16, a main valve port 17 and an inner cavity 18;

the device comprises a shut valve 2, a shut valve body 21, a second coil assembly 22, a static iron core 23, an upper movable iron core 24, a lower movable iron core 25, a first return spring 26, a second return spring 27, a first sealing part 28, a second sealing part 29, a connecting sleeve 30 and a connecting rod 31;

the high-low-temperature-resistant proportional valve comprises a proportional valve 3, a high-low-temperature-resistant adjusting device 31, a valve rod 311, a low-temperature-resistant adjusting screw 312, a low-temperature-resistant adjusting spring 313, a fixing screw 314, a high-temperature-resistant limiting gasket 315, a high-temperature-resistant adjusting screw 316, a housing 32, a power terminal 320, a positioning groove 321, a reed frame 33, an outer ring fixing protrusion 330, a convex ring 331, a first positioning protrusion 332, a lead leading-out hole 333, a lead leading-out groove 334, a reed 34, an outer ring 340, an inner ring 341, an arc-shaped strip 342, an outer ring fixing hole 343, an inner ring fixing hole 344, an outer lead 35, a permanent magnet assembly 36, a magnetic conduction frame 360, a hollow column 3601, a ring piece 3602, a second positioning protrusion 3603, a positioning hole 3604, a permanent magnet 361, a magnetic;

a passage 4, a pressure regulating diaphragm 5, a main valve 6 and a main valve diaphragm 61.

Detailed Description

The present invention will be described in further detail with reference to examples.

In the present embodiment, as shown in fig. 1, the gas proportional valve includes a valve seat 1, and a shut-off valve 2, a proportional valve 3, and a main valve 6 are fixed to the valve seat 1. The valve seat 1 is provided with an air inlet channel 11, an air outlet channel 12 and an inner cavity 18, and the inner cavity 18 is provided with a flow channel 15. The side of the inner cavity 18 close to the air inlet 11 is provided with an air inlet I13, and the side close to the main valve 6 is provided with a main valve port 17. One end of the flow channel 15 close to the air inlet 11 is provided with a second air inlet 14, one end of the flow channel 15 far away from the air inlet 11 is divided into two paths, one path flows to the proportional valve 3, the other path flows to the back of the main valve membrane 61, and one end of the flow channel 15 flowing to the proportional valve 3 is provided with a proportional valve port 16. Gas enters the inner cavity 18 from the first gas inlet 13 and flows to the main valve port 17 through the inner cavity 18, and the main valve 6 controls whether the gas flows into the gas outlet channel 12 or not by opening and closing the main valve port 17; the gas part entering the inner cavity 18 flows into the flow passage 15, flows to the proportional valve 3 and the main valve 6 through the guide of the flow passage 15, and the opening degree of the main valve port 17 opened by the main valve 6 can be controlled by adjusting the opening degree of the proportional valve port 16.

As shown in fig. 1 to 11, the proportional valve 3 includes a housing 32, a channel 4 is opened on the housing 32, a big fire adjusting device 31 is connected in the channel 4, the big fire adjusting device 31 includes a small fire adjusting screw 312, a small fire adjusting spring 313, a fixing screw 314, a big fire limiting gasket 315, a big fire adjusting screw 316 and a valve rod 311 which are sequentially arranged from top to bottom, wherein the big fire adjusting screw 316 is connected on the housing 32 in a threaded manner, the small fire adjusting screw 312 is connected in the big fire adjusting screw 316 in a threaded manner, one end of the valve rod 311 is limited in the big fire adjusting screw 316 through the fixing screw 314 and the big fire limiting gasket 315, and the big fire limiting gasket 315 is connected with the small fire adjusting screw 312 through the small fire adjusting spring 313. The upper end and the lower end in the housing 32 are respectively provided with a reed frame 33, reeds 34 are respectively fixed on the two reed frames 33, a first coil assembly 37 is fixed between the two reeds 34, a permanent magnet assembly 36 sleeved outside the first coil assembly 37 is arranged between the two reed frames 33, and the channel 4 penetrates through the reed frames 33, the reeds 34 and the first coil assembly 37. The other end of the valve rod 311 passes through the passage 4 and is fixedly connected with the first coil assembly 37. The end of the valve rod 311 fixed with the first coil assembly 37 is connected with a pressure regulating diaphragm 5 for opening and closing the valve port 16 of the proportional valve through a proportional regulating spring 38. During proportional adjustment, the first coil assembly 37 is energized and excited to generate repulsion with the permanent magnet assembly 36, and then the proportional adjustment spring 38 is compressed to drive the pressure adjustment diaphragm 5 to seal the valve port 16 of the proportional valve, the opening degree of the valve port 16 of the proportional valve is controlled by controlling the current, the pressure on the back of the main valve diaphragm 61 is controlled, and the opening degree of the valve port 17 of the main valve is different according to the pressure, so that the proportional adjustment effect is achieved.

The reed 34 comprises an outer ring 340 fixedly connected with the reed frame 33, an inner ring 341 fixedly connected with the coil assembly I37 and an elastic part for connecting the outer ring 340 and the inner ring 341, wherein the elastic part comprises a plurality of arc-shaped strips 342 arranged along the circumferential direction of the inner ring, one ends of the arc-shaped strips 342 are fixed with the outer ring 340 of the reed 34, and the other ends of the arc-shaped strips 342 are fixed with the inner ring 341 of the reed 34. Outer ring fixing protrusions 330 are arranged on the reed frame 33, outer ring fixing holes 343 matched with the outer ring fixing protrusions 330 are arranged on the outer ring 340 of the reed 34, and the reed 34 can be installed in the reed frame 33 through the outer ring fixing holes 343 and the outer ring fixing protrusions 330. The first coil component 37 comprises a bobbin 370 (the other end of the valve rod 311 is fixedly connected with the bobbin 370) and a winding 372 wound at the middle part of the outer wall of the bobbin 370, an inner ring fixing protrusion 373 is arranged on the bobbin 370, an inner ring fixing hole 344 matched with the inner ring fixing protrusion 373 is arranged on an inner ring 341 of the reed 34, and the first coil component 37 and the upper and lower reeds 34 are connected together through the inner ring fixing protrusion 373 and the inner ring fixing hole 344.

The inner wall of the housing 32 is provided with a plurality of positioning grooves 321, the outer wall of the reed frame 33 is provided with a first positioning protrusion 332 matched with the positioning grooves 321, and the coaxiality of the reed frame 33 and the housing 32 can be ensured by matching of the positioning grooves 321 and the first positioning protrusions 332.

In this embodiment, the permanent magnet assembly 36 includes two magnetic conduction frames 360 symmetrically arranged, each magnetic conduction frame 360 includes a hollow column 3601 sleeved outside the coil frame 370, one end of the hollow column 3601 extends outward to form a ring piece 3602, the hollow column 3601 is externally sleeved with a permanent magnet 361 and a magnetic conduction piece 362, and the permanent magnet 361 is located between the ring piece 3602 and the magnetic conduction piece 362. The reed frame 33 is provided with a convex ring 331 which is clamped in the hollow column 3601, as shown in fig. 9, the inner wall of the top end of the hollow column 3601 forms a limiting step through the change of the inner diameter, the convex ring 331 can be abutted against the limiting step after being inserted, and the coaxiality between the reed frame 33 and the magnetic conduction frame 360 can be ensured through the design that the convex ring 331 is clamped in the hollow column 3601.

As shown in fig. 9, the ring pieces 3602 are provided with positioning holes 3604 and two positioning protrusions 3603, the positioning holes 3604 and the positioning protrusions on the two ring pieces 3602 are matched with each other, and the coaxiality between the upper magnetic conduction frame 360 and the lower magnetic conduction frame 360 can be ensured through the matching of the positioning holes 3604 and the two positioning protrusions 3603.

In the prior art, the reed 34 is connected to the power terminal 320 by using the integrally formed reed strip of the reed 34 as the power connection line, but since the power connection line is a part of the reed, the cost is high, and the flexibility is low, which is not beneficial to routing of the proportional valve 3, the embodiment adopts the soldering lead on the reed 34 to replace the reed strip, so as to reduce the cost. As shown in fig. 11 and 12, the middle portion of the bobbin 370 is used for mounting the winding 372, the upper and lower sides of the outer wall of the bobbin 370 are both provided with wire slots for mounting the inner lead, one end of the inner lead is connected with the winding 372, and the other end of the inner lead is connected with the reeds 34, so that the winding 372 can be connected with the upper and lower reeds 34, and meanwhile, the outer lead 35 is fixed on the upper and lower reeds 34, and the outer lead 35 is connected with the power terminal 320 on the housing 32. In order to facilitate the leading-out and positioning of the external lead 35, the lead frame 33 of the present embodiment is provided with a lead leading-out hole 333 and a lead leading-out groove 334 for facilitating the leading-out of the external lead 35.

The valve body of the single form of cutting off that trip valve 2 among the prior art was mostly, the security is not high. The trip valve 2 of this embodiment includes trip valve body 21, and this internal quiet iron core 23 that is equipped with of trip valve 2, goes up movable iron core 24 and two 22 of coil pack, and quiet iron core 23 sets up the top in two 22 of coil pack and passes through the magnetic conduction frame intercommunication with two of coil pack, goes up movable iron core 24 and can reciprocate in two 22 of coil pack and separate through magnetic isolation cover with two 22 of coil pack (this part sets up in prior art the same). Go up the one end that movable core 24 stretches out trip valve 2 body and be fixed with adapter sleeve 30, be equipped with the sealing 28 that is used for opening and close air inlet 13 on the adapter sleeve 30 outer wall, be equipped with between sealing 28 and the trip valve body 21 and reply spring 26, be equipped with both ends opening and hollow lower movable core 25 in the adapter sleeve 30, be equipped with connecting rod 31 in the lower movable core 25, the one end of connecting rod 31 and last movable core 24 between be equipped with and reply spring two 27, the other end of connecting rod 31 stretches out adapter sleeve 30 and is equipped with the sealing two 29 that are used for opening and close air inlet two 14.

The working principle of the embodiment is as follows:

and (4) cutting a valve 2 part: the cut-off valve 2 is electrified, the second coil component 22 generates magnetic force and transmits the magnetic force to the static iron core 23, so that the upper movable iron core 24 moves upwards to be attracted with the static iron core 23, the connecting sleeve 30 moves upwards due to the upward movement of the upper movable iron core 24, the first sealing part 28 is driven to open the first air inlet 13, and at the moment, the fuel gas can flow to the main valve port 17 through the inner cavity 18; the upward movement of the upper movable iron core 24 also drives the upward movement of the lower movable iron core 25, so that the second sealing part 29 is driven to open the second air inlet 14, and at the moment, the fuel gas can flow to the valve port 16 of the proportional valve and the back of the main valve diaphragm 61 through the flow channel 15; when the power is off, the upper movable iron core 24 resets under the action of the first return spring 26, and the lower movable iron core 25 resets under the action of the second return spring 27, so that the two air inlets can be closed, the mode of controlling the two sealing parts by the single coil is adopted, when the first sealing part 28 fails, the blockage of the second sealing part 29 is not influenced, and the safety performance of the gas proportional valve 3 is also improved due to the design of a double-cut-off mode.

Proportional valve 3 part: after the power is switched on, the winding 372 generates a magnetic field, as shown in fig. 2, the magnetic field of the winding 372 interacts with the magnetic field of the permanent magnet 361, so that the coil assembly 37 can move up and down (the spring piece 34 is provided with an elastic part, so the coil assembly 37 can move), and the adjustment of the magnetic force of the magnetic field can be achieved by adjusting the current at the winding 372, thereby the purpose of adjusting the displacement of the coil assembly 37 is achieved, the movement of the coil assembly 37 drives the valve rod 311 to move, so that the pressure adjusting diaphragm 5 can adjust the opening degree of the valve port 16 of the proportional valve, the permanent magnet assembly 36 is arranged outside the coil assembly 37, the magnetic circuit of the permanent magnet assembly 36 is a closed-loop magnetic circuit, the generation of a magnetic leakage phenomenon is avoided, and the adjustment performance of the proportional valve 3 is better.

The above-mentioned embodiments are merely illustrative of the inventive concept and are not intended to limit the scope of the invention, which is defined by the claims and the insubstantial modifications of the inventive concept can be made without departing from the scope of the invention.

Claims

1. The utility model provides a gas proportional valve, includes the proportional valve, and the proportional valve includes the housing, even has big fire adjusting device in the housing, and it has valve rod, its characterized in that to limit in the big fire adjusting device: the valve comprises a housing and is characterized in that two reed frames are arranged in the housing, reeds are fixed on the two reed frames, a first coil assembly is fixed between the two reeds, a permanent magnet assembly sleeved outside the first coil assembly is arranged between the two reed frames, a channel is formed in each of the reed frames, the reeds and the first coil assembly, and a valve rod penetrates through the channel and is fixedly connected with the first coil assembly.

2. A gas proportioning valve as claimed in claim 1 wherein: the reed comprises an outer ring fixedly connected with the reed frame, an inner ring fixedly connected with the coil assembly and an elastic part used for connecting the outer ring and the inner ring, wherein the elastic part comprises a plurality of arc-shaped strips arranged along the circumferential direction of the inner ring, one ends of the arc-shaped strips are fixed with the outer ring of the reed, and the other ends of the arc-shaped strips are fixed with the inner ring of the reed.

3. A gas proportioning valve as claimed in claim 2 wherein: and the reed frame is provided with an outer ring fixing bulge, and the outer ring of the reed is provided with an outer ring fixing hole matched with the outer ring fixing bulge.

4. A gas proportioning valve as claimed in claim 2 wherein: and the first coil assembly is provided with an inner ring fixing bulge, and the inner ring of the reed is provided with an inner ring fixing hole matched with the inner ring fixing bulge.

5. A gas proportioning valve as claimed in claim 1 wherein: the inner wall of the housing is provided with a plurality of positioning grooves, and the outer wall of the reed frame is provided with a first positioning bulge matched with the positioning grooves.

6. A gas proportioning valve as claimed in claim 1 wherein: the permanent magnet assembly comprises two symmetrically-arranged magnetic conduction frames, each magnetic conduction frame comprises a hollow cylinder body which is arranged outside the coil assembly in a sleeved mode, one end of each hollow cylinder body extends outwards to form a ring piece, the outer portion of each hollow cylinder body is provided with a permanent magnet and a magnetic conduction piece in a sleeved mode, the permanent magnet is located between the ring piece and the magnetic conduction piece, and a convex ring which is clamped into the hollow cylinder body is arranged on the reed frame.

7. A gas proportioning valve as claimed in claim 6 wherein: and the two ring pieces are provided with positioning holes and positioning bulges which are matched with each other.

8. A gas proportioning valve as claimed in claim 1 wherein: the power supply terminal is arranged on the housing, an outer wire used for being connected with the power supply terminal is fixedly connected to the reed, the coil assembly I comprises a coil and a winding wound outside the coil, the outer wall of the coil is located on two sides of the winding, wire grooves are formed in the two sides of the winding, an inner wire is laid in the wire grooves, one end of the inner wire is connected with the winding, and the other end of the inner wire is connected with the reed.

9. A gas proportioning valve as claimed in claim 8 wherein: and the reed frame is provided with a lead leading-out hole and/or a lead leading-out groove for leading out a lead conveniently.

10. A gas proportioning valve as claimed in claim 1 wherein: including the trip valve, the trip valve includes the trip valve body, and this internal quiet iron core that is equipped with of trip valve moves the iron core on, the one end that moves the iron core and stretch out the trip valve body on is fixed with the adapter sleeve, is equipped with sealing on the adapter sleeve outer wall and replys spring one, be equipped with both ends opening and hollow and move the iron core down in the adapter sleeve, be equipped with the connecting rod in moving the iron core down, the one end of connecting rod and last move and be equipped with between the iron core and reply spring two, the other end of connecting rod stretches out the adapter sleeve and is equipped with sealing two.