Compact-structure proportional valve

Abstract

The utility model belongs to the technical field of proportional valves, and particularly relates to a proportional valve with a compact structure, which comprises a proportional valve body, a valve seat arranged in a first cavity, a valve core movably arranged on an opening of the valve seat in a penetrating manner, a sealing ring plug and a first sealing elastic piece, an annular mounting groove is arranged at the upper end of the valve core, and the sealing ring plug is sleeved on the annular mounting groove. In the valve closing state, the first sealing elastic piece drives the valve element to move, the sealing ring plug keeps the trend of moving towards the opening direction of the valve seat, namely, the sealing ring plug abuts against the valve seat to seal the opening of the valve seat, the sealing performance is good, only the sealing ring plug needs to be directly arranged on the annular installation groove in a sleeving mode during installation, the structure is simple, and installation is convenient.

Description

[Technical field]

[0001] The utility model belongs to the technical field of proportional valves, and in particular relates to a proportional valve with a compact structure. [Background technology]

[0002] Gas proportional control valves are widely used in various gas water heaters on the market. They use proportional control technology, which is a technical means to achieve a linear relationship between the controlled quantity and the control quantity of a component or system, to ensure that the output changes in a certain proportion with the input quantity to control the flow of gas, so that the gas inlet pressure of the gas appliance remains stable, and solves the problem of unstable gas combustion and hot and cold water temperature caused by gas inlet pressure fluctuations in gas water heaters. For example, the utility model patent with publication number CN202195081U discloses a gas proportional valve, which controls the flow of gas by driving the valve core with a dynamic magnetic drive, but there is a problem of weak sealing between the valve core and the housing of the proportional valve. There is currently a gas proportional valve, such as Figure 6 As shown, the sealing performance between the valve core 204 and the valve seat 201 is improved by arranging a valve port composite 202 on the valve seat 201 and a sealant 203 arranged on the valve port composite 202. However, this sealing method has a complex structure, is not compact enough, and is inconvenient to install. [Contents of the utility model]

[0003] The utility model aims to provide a compact proportional valve with good sealing performance, simple structure and convenient installation.

[0004] The utility model is realized by the following technical solutions:

[0005] A compact proportional valve, comprising:

[0006] A proportional valve body, on which an air inlet passage, a first cavity, and an air outlet passage communicating with the first cavity are provided;

[0007] A valve seat is disposed in the first cavity, the valve seat is provided with a second cavity and a valve seat opening communicating with the first cavity and the second cavity, and the air inlet passage is communicated with the second cavity;

[0008] A valve core is movably arranged on the valve seat opening, and an annular mounting groove is arranged on the upper end of the valve core;

[0009] A sealing ring plug is sleeved on the annular mounting groove;

[0010] The first sealing elastic member is arranged in the first cavity and is used to drive the valve core so that the sealing ring plug maintains a tendency to move toward the direction close to the valve seat opening.

[0011] As described above, a compact proportional valve is provided with a first annular protrusion on the circumferential side of the valve core and a second annular protrusion located below the first annular protrusion, the first annular protrusion and the second annular protrusion together form an annular mounting groove, and the radial dimension of the first annular protrusion is larger than that of the second annular protrusion, and a sealing inclined surface inclined from the first annular protrusion to the second annular protrusion is provided on the outer side surface of the sealing ring plug.

[0012] In the above-mentioned compact proportional valve, the upper edge of the valve seat opening is provided with a rounded corner.

[0013] As described above, a compact proportional valve is provided, wherein a proportional valve cover is provided at a position of the proportional valve body corresponding to the first cavity, wherein a permanent magnetic cover connected to the lower end of the valve core and a first permanent magnet arranged in the permanent magnetic cover are provided inside the proportional valve cover, wherein the permanent magnetic cover is provided with an annular fixing protrusion extending away from the first cavity, and at least two fixing hooks arranged circumferentially along the annular fixing protrusion, wherein the first permanent magnet can be embedded in the annular fixing protrusion and fixed by means of the fixing hook.

[0014] In the above-mentioned compact proportional valve, a push rod and a pressing protrusion located on the periphery of the push rod are provided at one end of the valve core away from the sealing ring plug, and the push rod and the pressing protrusion are integrally formed with the valve core.

[0015] As described above, a compact proportional valve is provided, wherein a sealing protrusion and a stop valve assembly are provided on the air intake passage, wherein the stop valve assembly includes a second permanent magnet movably arranged on the air intake passage, a permanent magnet seal arranged on one end of the second permanent magnet close to the sealing protrusion, a second sealing elastic member sleeved on the second permanent magnet for keeping the permanent magnet seal moving toward the sealing protrusion, and a first electromagnetic field assembly arranged on the air intake passage for driving the second permanent magnet to move.

[0016] As described above, a compact proportional valve is described, wherein the air intake passage includes a first air intake section arranged vertically, a second air intake section arranged horizontally and connected to the first air intake section, and a third air intake section perpendicular to the second air intake section and connected to the second air intake section and the second cavity. A second electromagnetic field component corresponding to the first permanent magnet and arranged vertically is provided on the proportional valve cover, and the first electromagnetic field component is provided on the second air intake section and arranged horizontally with the second air intake section so that the second electromagnetic field component is offset and perpendicular to the first electromagnetic field component.

[0017] In the above-mentioned compact proportional valve, a plurality of reinforcing ribs arranged along the circumferential direction are provided on the outer side wall of the first air inlet section.

[0018] As described above, a compact proportional valve is provided, wherein a mounting base plate is provided on the proportional valve body, a spring mounting protrusion corresponding to the valve core is provided on the side of the mounting base plate close to the first cavity, a spring mounting groove is provided on the upper end of the valve core, one end of the first sealing elastic member is provided in the spring mounting groove, and the other end is sleeved and pressed on the spring mounting protrusion.

[0019] As described above, in a compact proportional valve, at least two first connecting pins are arranged between the proportional valve body and the proportional valve cover, at least two second connecting pins are arranged between the proportional valve body and the stop valve assembly, and at least two third connecting pins are arranged between the proportional valve body and the mounting base plate.

[0020] Compared with the prior art, the utility model has the following advantages:

[0021] The utility model provides a proportional valve with a compact structure, comprising a proportional valve body, a valve seat arranged in a first cavity, a valve core movably arranged on an opening of the valve seat, a sealing ring plug and a first sealing elastic member, an annular mounting groove is arranged on the upper end of the valve core, and the sealing ring plug is sleeved on the annular mounting groove, and in a closed valve state, the first sealing elastic member drives the valve core to move so that the sealing ring plug maintains a tendency to move toward the direction of the valve seat opening, that is, the sealing ring plug abuts against the valve seat to seal the valve seat opening, and the sealing performance is good, and during installation, the sealing ring plug only needs to be directly sleeved on the annular mounting groove, and the structure is simple and the installation is convenient.

Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0023] Figure 1 It is a structural schematic diagram of a compact proportional valve in a specific implementation mode of the utility model;

[0024] Figure 2 It is a structural schematic diagram of a compact proportional valve in a specific implementation mode of the utility model;

[0025] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction;

[0026] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure along the middle BB direction;

[0027] Figure 5 This is a schematic diagram of the structure of the permanent magnetic cover in a specific implementation mode of the utility model;

[0028] Figure 6 It is a schematic diagram of the cross-sectional structure of an existing gas proportional valve. [Specific implementation method]

[0029] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] When the embodiments of the present invention mention ordinal numbers such as "first" and "second", unless they do express the meaning of order according to the context, they should be understood as being merely for distinction.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Specific embodiments, such as Figure 1-5 A compact proportional valve is shown, comprising: a proportional valve body 1, on which is provided an air inlet passage 11, a first cavity 12, and an air outlet passage 13 connected to the first cavity 12; a valve seat 2, which is arranged in the first cavity 12, and the valve seat 2 is provided with a second cavity 21 and a valve seat opening 22 connecting the first cavity 12 and the second cavity 21, and the air inlet passage 11 is connected to the second cavity 21; a valve core 3, which is movably inserted into the valve seat opening 22, and an annular mounting groove 31 is provided at the upper end of the valve core 3; a sealing ring plug 4, which is sleeved on the annular mounting groove 31; a first sealing elastic member 5, which is arranged in the first cavity 12 and is used to drive the valve core 3, so that the sealing ring plug 4 maintains a tendency to move toward the valve seat opening 22. When the valve is in the closed state, the first sealing elastic member drives the valve core to move, so that the sealing ring plug maintains a tendency to move toward the valve seat opening, that is, the sealing ring plug abuts against the valve seat to seal the valve seat opening, with good sealing performance. During installation, the sealing ring plug only needs to be directly mounted on the annular mounting groove, with a simple structure and easy installation.

[0033] Specifically, a first annular protrusion 61 and a second annular protrusion 62 located below the first annular protrusion 61 are provided on the circumference of the valve core 3. The first annular protrusion 61 and the second annular protrusion 62 together form an annular mounting groove 31, and the radial dimension of the first annular protrusion 61 is larger than that of the second annular protrusion 62, which facilitates the disassembly and assembly of the sealing ring plug 4. At the same time, a sealing inclined surface 41 inclined from the first annular protrusion 61 to the second annular protrusion 62 is provided on the outer side surface of the sealing ring plug 4. When the sealing ring plug 4 moves with the rise and fall of the valve core, an air port is formed between the sealing ring plug 4 and the valve seat opening 22, and the design of the sealing inclined surface 41 can make the air port gradually increase or decrease as the valve core rises and falls, and the control is more convenient and accurate.

[0034] In addition, in order to avoid damaging the sealing ring plug 4 , increase the service life of the sealing ring plug 4 and save costs, a rounded corner 7 is provided on the upper edge of the valve seat opening 22 .

[0035] Furthermore, the proportional valve body 1 is provided with a proportional valve cover 8 at a position corresponding to the first cavity 12, and the proportional valve cover 8 is provided with a permanent magnet cover 9 connected to the lower end of the valve core 3, and a first permanent magnet 10 arranged in the permanent magnet cover 9, and the permanent magnet cover 9 extends away from the first cavity 12 with an annular fixing protrusion 14, and at least two fixing hooks 15 arranged circumferentially along the annular fixing protrusion 14, and the first permanent magnet 10 can be embedded in the annular fixing protrusion 14 and fixed by the fixing hook 15. The existing permanent magnet cover 205 is as shown in FIG. Figure 6 As shown, the permanent magnet is fixed by the split upper cover 2051 and the lower cover 2052, which has high production cost and a less compact structure. The present application fixes the first permanent magnet 10 by an integrated permanent magnet cover 9, an annular fixing protrusion 14 and a fixing hook 15, which has low cost and a more compact structure.

[0036] More specifically, the end of the valve core 3 away from the sealing ring plug 4 is provided with a push rod 16 and a pressing protrusion 17 located on the side of the push rod 16, and the push rod 16 and the pressing protrusion 17 are integrally formed with the valve core 3. Figure 6 As shown, the valve core is fixed by setting a gasket 206 at the end thereof, and the structure is not compact. However, the present application realizes fixation by a pressing protrusion 17 integrally formed with the valve core 3, and the structure is more compact.

[0037] Furthermore, a sealing protrusion 18 and a shut-off valve assembly 19 are provided on the air intake passage 11, and the shut-off valve assembly 19 includes a second permanent magnet 191 movably provided on the air intake passage 11, a permanent magnetic seal 192 provided on one end of the second permanent magnet 191 close to the sealing protrusion 18, a second sealing elastic member 193 sleeved on the second permanent magnet 191 for keeping the permanent magnetic seal 192 moving toward the sealing protrusion 18, and a first electromagnetic field assembly 194 provided on the air intake passage 11 for driving the second permanent magnet 191 to move.

[0038] Furthermore, the air inlet passage 11 includes a first air inlet section 111 arranged vertically, a second air inlet section 112 arranged horizontally and connected to the first air inlet section 111, and a third air inlet section 113 perpendicular to the second air inlet section 112 and connected to the second air inlet section 112 and the second cavity 21. The proportional valve cover 8 is provided with a second electromagnetic field component 20 arranged vertically corresponding to the first permanent magnet 10, and the first electromagnetic field component 194 is arranged on the second air inlet section 112 and arranged horizontally with the second air inlet section 112, so that the second electromagnetic field component 20 is displaced and perpendicular to the first electromagnetic field component 194. Avoid electromagnetic field interference, enhance the electromagnetic anti-interference of the product, and reduce the lateral installation space to reduce the product appearance structure volume.

[0039] Specifically, a plurality of reinforcing ribs 23 arranged along the circumferential direction are provided on the outer side wall of the first air inlet section 111, so as to improve the structural strength of the first air inlet section 111 and enhance the anti-deformation performance of the product.

[0040] More specifically, the proportional valve body 1 is provided with a mounting base plate 24, a spring mounting protrusion 25 corresponding to the valve core 3 is provided on the side of the mounting base plate 24 close to the first cavity 12, a spring mounting groove 26 is provided on the upper end of the valve core 3, one end of the first sealing elastic member 5 is arranged in the spring mounting groove 26, and the other end is sleeved and pressed on the spring mounting protrusion 25. The structure is more compact.

[0041] Furthermore, at least two first connecting pins 271 are provided between the proportional valve body 1 and the proportional valve cover 8, at least two second connecting pins 272 are provided between the proportional valve body 1 and the stop valve assembly 19, and at least two third connecting pins 273 are provided between the proportional valve body 1 and the mounting base plate 24. The connection between the proportional valve body 1 and the proportional valve cover 8, the stop valve assembly 19, and the mounting base plate 24 adopts a locating pin structural design to improve production efficiency and ensure product quality.

[0042] The above is an implementation method provided in combination with specific content, and it is not considered that the specific implementation of the utility model is limited to these descriptions. At the same time, due to different industry names, it is not limited to the above names, nor is it limited to English names. Any method, structure, etc. similar to or identical to the method, structure, etc. of the utility model, or a number of technical deductions or replacements made on the premise of the concept of the utility model, shall be regarded as the protection scope of the utility model.

Claims

1. A compact proportional valve, characterized in that: include: A proportional valve body (1) is provided with an air inlet passage (11), a first cavity (12), and an air outlet passage (13) connected to the first cavity (12); A valve seat (2) is arranged in the first cavity (12), the valve seat (2) is provided with a second cavity (21) and a valve seat opening (22) communicating the first cavity (12) and the second cavity (21), and the air inlet passage (11) is in communication with the second cavity (21); A valve core (3) is movably inserted into the valve seat opening (22), and an annular mounting groove (31) is provided at the upper end of the valve core (3); A sealing ring plug (4) sleeved on the annular mounting groove (31); The first sealing elastic member (5) is arranged in the first cavity (12) and is used to drive the valve core (3) so that the sealing ring plug (4) maintains a tendency to move toward a direction close to the valve seat opening (22).

2. A compact proportional valve according to claim 1, characterized in that: The valve core (3) is provided with a first annular protrusion (61) and a second annular protrusion (62) located below the first annular protrusion (61), the first annular protrusion (61) and the second annular protrusion (62) together form an annular mounting groove (31), and the radial dimension of the first annular protrusion (61) is larger than that of the second annular protrusion (62), and the outer side surface of the sealing ring plug (4) is provided with a sealing inclined surface (41) inclined from the first annular protrusion (61) to the second annular protrusion (62).

3. A compact proportional valve according to claim 1, characterized in that: The upper edge of the valve seat opening (22) is provided with a rounded corner (7).

4. A compact proportional valve according to claim 1, characterized in that: A proportional valve cover (8) is provided at a position of the proportional valve body (1) corresponding to the first cavity (12); a permanent magnet cover (9) connected to the lower end of the valve core (3) and a first permanent magnet (10) arranged in the permanent magnet cover (9) are provided in the proportional valve cover (8); an annular fixing protrusion (14) and at least two fixing hooks (15) arranged circumferentially along the annular fixing protrusion (14) are extended from the permanent magnet cover (9) in a direction away from the first cavity (12); and the first permanent magnet (10) can be embedded in the annular fixing protrusion (14) and fixed by means of the fixing hook (15).

5. A compact proportional valve according to claim 4, characterized in that: An end of the valve core (3) away from the sealing ring plug (4) is provided with a push rod (16) and a pressing protrusion (17) located on the peripheral side of the push rod (16); the push rod (16) and the pressing protrusion (17) are both integrally formed with the valve core (3).

6. A compact proportional valve according to claim 4, characterized in that: The air intake passage (11) is provided with a sealing protrusion (18) and a stop valve assembly (19), wherein the stop valve assembly (19) comprises a second permanent magnet (191) movably arranged on the air intake passage (11), a permanent magnetic seal (192) arranged at one end of the second permanent magnet (191) close to the sealing protrusion (18), a second sealing elastic member (193) sleeved on the second permanent magnet (191) for keeping the permanent magnetic seal (192) moving in a direction close to the sealing protrusion (18), and a first electromagnetic field assembly (194) arranged on the air intake passage (11) for driving the second permanent magnet (191) to move.

7. A compact proportional valve according to claim 6, characterized in that: The air intake passage (11) comprises a first air intake section (111) arranged vertically, a second air intake section (112) arranged horizontally and connected to the first air intake section (111), and a third air intake section (113) perpendicular to the second air intake section (112) and connected to the second air intake section (112) and the second cavity (21); a second electromagnetic field component (20) corresponding to the first permanent magnet (10) and arranged vertically is provided on the proportional valve cover (8); the first electromagnetic field component (194) is provided on the second air intake section (112) and arranged horizontally with the second air intake section (112), so that the second electromagnetic field component (20) and the first electromagnetic field component (194) are offset and perpendicular to each other.

8. A compact proportional valve according to claim 7, characterized in that: A plurality of reinforcing ribs (23) arranged along the circumferential direction are provided on the outer side wall of the first air inlet section (111).

9. A compact proportional valve according to claim 8, characterized in that: The proportional valve body (1) is provided with a mounting base plate (24), and a spring mounting protrusion (25) corresponding to the valve core (3) is provided on a side of the mounting base plate (24) close to the first cavity (12). The upper end of the valve core (3) is provided with a spring mounting groove (26), and one end of the first sealing elastic member (5) is arranged in the spring mounting groove (26), and the other end is sleeved and pressed on the spring mounting protrusion (25).

10. A compact proportional valve according to claim 9, characterized in that: At least two first connecting pins (271) are provided between the proportional valve body (1) and the proportional valve cover (8), at least two second connecting pins (272) are provided between the proportional valve body (1) and the stop valve assembly (19), and at least two third connecting pins (273) are provided between the proportional valve body (1) and the mounting base plate (24).

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