Quantitative valve and diaphragm for quantitative valve

Abstract

The utility model belongs to the technical field of valve bodies, and particularly relates to a proportional valve and a diaphragm for the proportional valve.The proportional valve comprises a valve body, a valve core, a diaphragm, a pressure sensor and a pressure sensor, the diaphragm is arranged in the mounting cavity and is used for opening and closing the flow channel; the guide cylinder is arranged in the mounting cavity and tightly presses the edge of the diaphragm; the piston penetrates through the guide cylinder, and the lower end part of the piston is in threaded connection with the diaphragm; the piston is suitable for being stressed to move upwards so as to drive the diaphragm to open the flow channel. According to the proportional valve and the diaphragm for the proportional valve, the lower portion of the installation cavity is communicated with the flow channel, after the edge of the diaphragm is pressed by the guide cylinder, isolation sealing is achieved between the lower portion of the installation cavity and the upper portion of the installation cavity, at the moment, after the piston drives the diaphragm to open the flow channel, a medium only flows below the diaphragm and cannot leak to the position above the diaphragm, and therefore the sealing performance of the diaphragm is improved. As the diaphragm is in a static sealing state, compared with a dynamic sealing state, the sealing performance is better, and sealing failure is not prone to occurring.

Description

Technical Field

[0001] This utility model belongs to the field of valve body technology, specifically relating to lifting valves, and more particularly to a metering valve and a diaphragm for the metering valve. Background Technology

[0002] Valves are usually installed on pipelines that transport media to control the flow of the pipeline.

[0003] In related technologies, valves generally use valve cores to control the opening and closing of flow channels. The valve core includes at least a lifting element and a blocking element. The blocking element is located at the end of the lifting element and blocks the flow channel by the movement of the lifting element.

[0004] However, in the above solution, since the sealing component moves as a whole with the lifting component, a sealing ring needs to be installed on the side wall of the lifting component for sealing. As working time goes by, the sealing ring will fail due to aging and other problems, which will lead to leakage.

[0005] Therefore, how to solve the technical problem of valve leakage caused by the aging of the sealing ring on the valve core is a problem that urgently needs to be solved by those skilled in the art.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0007] This disclosure provides at least one metering valve and a diaphragm for the metering valve.

[0008] In a first aspect, embodiments of this disclosure provide a metering valve, comprising: a valve body having an installation chamber and a flow channel therein, the installation chamber communicating with the flow channel; a diaphragm disposed in the installation chamber for opening and closing the flow channel; a guide cylinder disposed in the installation chamber and pressing against the edge of the diaphragm; and a piston passing through the guide cylinder and having its lower end threadedly connected to the diaphragm; wherein the piston is adapted to be moved upward under force to drive the diaphragm to open the flow channel.

[0009] In one alternative embodiment, the diaphragm includes a blocking portion located in the center and a sealing portion located around the perimeter; the piston is connected to the blocking portion, and the guide cylinder presses against the sealing portion.

[0010] In one optional embodiment, the sealing part is provided with a connecting post with external threads on the side facing the piston; the piston is provided with a connecting groove with internal threads on the side facing the connecting post; wherein, the diaphragm is connected to the connecting groove of the piston through the connecting post.

[0011] In one alternative embodiment, a spring is disposed above the piston, one end of the spring abutting against the piston and the other end abutting against the inner wall of the mounting chamber; wherein the spring is adapted to press against the piston to close the flow channel of the diaphragm.

[0012] In one optional embodiment, the upper end face of the piston is provided with a first annular limiting groove; the inner wall of the mounting chamber is provided with a second annular limiting groove; wherein, the two ends of the spring are respectively located in the corresponding limiting grooves for limiting.

[0013] In one alternative embodiment, the piston has a T-shaped axial cross-section; wherein, when the valve is closed, the piston and the guide cylinder have an air-filled chamber.

[0014] In one optional embodiment, the side wall of the valve body is provided with an air inlet communicating with the inflation chamber; the inflation chamber is adapted to be inflated to cause the piston to move upward under force.

[0015] In one optional embodiment, a handwheel is provided at the upper end of the valve body, and the handwheel is threadedly connected to the valve body; wherein, the lower end of the handwheel is adapted to extend into the mounting chamber, and the length of the extension into the mounting chamber is adjusted by rotation to limit the height of the piston's upward movement under force, i.e., to adjust the flow rate.

[0016] Secondly, embodiments of this disclosure also provide a diaphragm for a metering valve, comprising: a blocking portion located in the center and a sealing portion located around the perimeter; wherein a connecting post with external threads is provided on one side of the blocking portion; and a flange is provided on the edge of the sealing portion.

[0017] In one alternative embodiment, an annular protrusion is provided on the inner or outer wall of the flange.

[0018] The beneficial effects of this utility model are that the mounting chamber of the metering valve and the diaphragm for the metering valve is connected to the flow channel through the lower part. After the edge of the diaphragm is pressed by the guide tube, the lower part of the mounting chamber and the upper part of the mounting chamber are isolated and sealed. At this time, when the piston drives the diaphragm to open the flow channel, the medium will only flow below the diaphragm and will not leak to the top of the diaphragm. Since the diaphragm is in a static sealing state, the sealing performance is better than that in a dynamic sealing state, and it is not easy for the seal to fail.

[0019] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a cross-sectional view of a metering valve provided in an embodiment of the present disclosure;

[0023] Figure 2 This is a schematic diagram of the structure of a diaphragm provided in an embodiment of the present disclosure;

[0024] Figure 3 This is a schematic diagram of a connection structure between a diaphragm and a piston provided in an embodiment of the present disclosure;

[0025] Figure 4 This is a cross-sectional structural diagram of a diaphragm provided in an embodiment of the present disclosure.

[0026] In the picture:

[0027] Valve body 1, mounting chamber 11, flow channel 12, handwheel 13, second annular limiting groove 14, air inlet 15;

[0028] 2. Diaphragm 21. Sealing part 22. Connecting post 23. Flanged edge 24. Annular protrusion 25;

[0029] Guide cylinder 3;

[0030] Piston 4, connecting groove 41, first annular limiting groove 42, inflation chamber 43;

[0031] Spring 5. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the figures, the thickness of parts may be exaggerated or reduced for the purpose of effectively depicting the technical content.

[0034] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0035] like Figure 1 As shown, at least one embodiment provides a metering valve, characterized in that it includes: a valve body 1, a diaphragm 2, a guide cylinder 3 and a piston 4, wherein the valve body 1 has an installation chamber 11 and a flow channel 12, and the installation chamber 11 is connected to the flow channel 12.

[0036] like Figure 1 As shown, in some embodiments, the diaphragm 2 is disposed in the mounting chamber 11 and connected to the piston 4 inside the mounting chamber 11. The piston 4 drives the diaphragm 2 to move up and down, thereby opening and closing the flow channel 12.

[0037] like Figure 1 As shown, in some embodiments, the guide cylinder 3 is disposed in the mounting chamber 11 and connected to the valve body 1 by a connector, thereby being fixedly disposed in the mounting chamber 11 to press the edge of the diaphragm 2.

[0038] In this embodiment, the lower part of the mounting chamber 11 is connected to the flow channel 12. After the edge of the diaphragm 2 is pressed by the guide cylinder 3, the lower part of the mounting chamber 11 and the upper part of the mounting chamber 11 are isolated and sealed. At this time, when the piston 4 drives the diaphragm 2 to open the flow channel 12, the medium will only flow below the diaphragm 2 and will not leak to the top of the diaphragm 2. In this embodiment, the diaphragm 2 is in a static sealing state (that is, the edge of the diaphragm 2 under pressure will not move). Compared with the dynamic sealing state (that is, a sealing ring is sleeved on the side wall of the lifting component), the sealing performance is better and the sealing is less likely to fail.

[0039] like Figure 1 As shown, in some embodiments, the piston 4 passes through a guide hole at the axis of the guide cylinder 3, thereby guiding the direction of the piston 4 during movement.

[0040] like Figure 2 As shown, in some embodiments, the diaphragm 2 includes a blocking portion 21 located in the center and a sealing portion 22 located around the periphery; the piston 4 is connected to the blocking portion 21, and the guide cylinder 3 presses against the sealing portion 22.

[0041] In this embodiment, the edge of the sealing part 22 is pressed by the guide cylinder 3. During the process of the piston 4 driving the sealing part 21 to rise and fall, the edge of the sealing part 22 will not move, thereby ensuring the sealing performance.

[0042] like Figure 3 As shown, in some embodiments, the sealing part 21 is provided with a connecting post 23 with external threads on the side facing the piston 4; the piston 4 is provided with a connecting groove 41 with internal threads on the side facing the connecting post 23; wherein, the diaphragm 2 is connected to the connecting groove 41 of the piston 4 through the connecting post 23.

[0043] In this embodiment, the diaphragm 2 is threaded to the lower end of the piston 4, thereby facilitating the installation and replacement of the diaphragm 2.

[0044] like Figure 1 As shown, in some embodiments, a spring 5 is provided above the piston 4, with one end of the spring 5 abutting against the piston 4 and the other end abutting against the inner wall of the mounting chamber 11; wherein, the spring 5 is adapted to abut against the piston 4 to close the flow channel 12 of the diaphragm 2.

[0045] In this embodiment, the upper end of the piston 4 is always subjected to the downward pressure of the spring 5, thereby pushing the piston 4 to drive the diaphragm 2 to close the flow channel 12.

[0046] like Figure 1 As shown, in some embodiments, the upper end face of the piston 4 is provided with a first annular limiting groove 42; the inner wall of the mounting chamber 11 is provided with a second annular limiting groove 14; wherein, the two ends of the spring 5 are respectively located in the corresponding limiting grooves for limiting.

[0047] In this embodiment, the first annular limiting groove 42 and the second annular limiting groove 14 are used to limit the position of the spring 5 and prevent the spring 5 from shifting and causing failure.

[0048] like Figure 1 As shown, in some embodiments, the axial cross-section of the piston 4 is "T" shaped; wherein, when the valve is closed, the piston 4 and the guide cylinder 3 have an air-filling chamber 43.

[0049] like Figure 1 As shown, in some embodiments, the side wall of the valve body 1 is provided with an air inlet 15 communicating with the inflation chamber 43; the inflation chamber 43 is adapted to be inflated to cause the piston 4 to move upward under force.

[0050] In this embodiment, the function of the spring 5 is to push the piston 4 downward to close the valve, and the function of the inflation chamber 43 is to push the piston 4 upward to open the valve; wherein, when opening the valve, the force of the inflation chamber 43 driving the piston 4 upward is greater than the downward force of the spring 5.

[0051] like Figure 1As shown, in some embodiments, a handwheel 13 is provided at the upper end of the valve body 1, and the handwheel 13 is threadedly connected to the valve body 1; wherein, the lower end of the handwheel 13 is adapted to extend into the mounting chamber 11, and the length of the extension into the mounting chamber 11 is adjusted by rotation to limit the height of the piston 4 under force, that is, to adjust the flow rate.

[0052] In this embodiment, the handwheel 13 is threadedly connected to the valve body 1. The lower end of the handwheel 13 can extend into the mounting chamber 11. By rotating the handwheel 13, the length of its lower end extending into the mounting chamber 11 can be adjusted to limit the upward movement of the piston 4, that is, to control the size of the diaphragm 2 opening the flow channel 12, thereby playing the role of metering the flow channel 12.

[0053] like Figure 4 As shown, at least one embodiment also provides a diaphragm for a metering valve, including: a blocking portion 21 located in the middle and a sealing portion 22 located around the perimeter; wherein a connecting post 23 with external threads is provided on one side of the blocking portion 21; and a flange 24 is provided on the edge of the sealing portion 22.

[0054] like Figure 4 As shown, in some embodiments, annular protrusions 25 are provided on the inner or outer wall of the flange 24.

[0055] In this embodiment, in order to make the sealing part 22 of the diaphragm seal better, a flange 24 is provided. The flange 24 is pressed into the limiting groove of the valve body 1 and tightened by the annular protrusion 25, thereby achieving a better sealing effect and making it less likely to shift under force.

[0056] In summary, the mounting chamber 11 of the metering valve and the diaphragm of the metering valve is connected to the flow channel 12 through the lower part. After the edge of the diaphragm 2 is pressed by the guide cylinder 3, the lower part of the mounting chamber 11 and the upper part of the mounting chamber 11 are isolated and sealed. At this time, when the piston 4 drives the diaphragm 2 to open the flow channel 12, the medium will only flow below the diaphragm 2 and will not leak to the upper part of the diaphragm 2. In this embodiment, the diaphragm 2 is in a static sealing state (that is, the pressed edge of the diaphragm 2 will not move). Compared with the dynamic sealing state (that is, a sealing ring is sleeved on the side wall of the lifting component), the sealing performance is better and the sealing failure is not easy.

[0057] In this document, when it is said that the first component is located on the second component, this can mean that the first component can be directly formed on the second component, or that the third component can be inserted between the first component and the second component.

[0058] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0059] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0060] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0061] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0062] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0063] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0064] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0065] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0066] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A metering valve, characterized in that, include: The valve body (1) has an installation chamber (11) and a flow channel (12) inside it, and the installation chamber (11) and the flow channel (12) are connected; A diaphragm (2) is installed in the installation chamber (11) and is used to open and close the flow channel (12). The guide tube (3) is set inside the installation chamber (11) and presses against the edge of the diaphragm (2); The piston (4) is mounted on the guide cylinder (3) and its lower end is threadedly connected to the diaphragm (2); The piston (4) is adapted to be moved upward under force to drive the diaphragm (2) to open the flow channel (12).

2. The metering valve as described in claim 1, characterized in that, The diaphragm (2) includes a sealing portion (21) located in the middle and a sealing portion (22) located around the perimeter. The piston (4) is connected to the sealing part (21), and the guide cylinder (3) presses against the sealing part (22).

3. The metering valve as described in claim 2, characterized in that, The sealing part (21) is provided with a connecting post (23) with external threads on the side facing the piston (4). The piston (4) has a connecting groove (41) with internal threads on the side facing the connecting column (23). The diaphragm (2) is connected to the connecting groove (41) of the piston (4) via the connecting post (23).

4. The metering valve as described in claim 1, characterized in that, A spring (5) is provided above the piston (4), one end of the spring (5) abuts against the piston (4), and the other end abuts against the inner wall of the mounting chamber (11); The spring (5) is adapted to press against the piston (4) to close the flow channel (12) with the diaphragm (2).

5. The metering valve as described in claim 4, characterized in that, The piston (4) has a first annular limiting groove (42) on its upper end surface. The inner wall of the installation chamber (11) is provided with a second annular limiting groove (14). The two ends of the spring (5) are respectively located in the corresponding limiting grooves for limiting.

6. The metering valve as described in claim 4, characterized in that, The axial cross-section of the piston (4) is T-shaped; wherein When the valve is closed, the piston (4) and the guide cylinder (3) have an air-filled chamber (43).

7. The metering valve as described in claim 6, characterized in that, The valve body (1) has an air inlet (15) on its side wall that communicates with the inflation chamber (43). The inflation chamber (43) is adapted to be inflated to cause the piston (4) to move upward under force.

8. The metering valve as described in claim 1, characterized in that, A handwheel (13) is provided at the upper end of the valve body (1), and the handwheel (13) is threadedly connected to the valve body (1); The lower end of the handwheel (13) is adapted to extend into the mounting chamber (11), and the length of the extension into the mounting chamber (11) is adjusted by rotating it, so as to limit the height of the piston (4) to be moved upward by force, that is, to adjust the flow rate.

9. A diaphragm for a metering valve, characterized in that, include: The sealing part (21) is located in the middle and the sealing part (22) is located around the perimeter; among which One side of the sealing part (21) is provided with a connecting post (23) with external threads. The edge of the sealing part (22) is provided with a flange (24).

10. The diaphragm for a metering valve as described in claim 9, characterized in that, The inner or outer wall of the flange (24) is provided with an annular protrusion (25).

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