Self-operated balance valve

Abstract

The utility model provides a self-operated balance valve. The self-operated balance valve comprises a valve body, an active adjusting assembly, an automatic adjusting assembly and a locking assembly. The active adjusting assembly is composed of a valve plate and a first valve seat matched with the valve plate, the rotating angle of the valve rod and the rotating angle of the valve plate are locked through the locking assembly, and the valve plate is prevented from automatically rotating under the impact of water flow. Compared with an existing valve ball and an existing valve seat matched with the valve ball, the self-operated balance valve has the advantages that due to the factors that the area of the matching face is smaller, the requirement for matching precision is lower and the like, the production process difficulty is lower, and the production and machining cost is lower.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and particularly relates to a self-acting balance valve. Background Art

[0002] The self-acting balance valve, also known as a pressure regulating valve, a flow control valve, a flow controller, a dynamic balance valve, and a flow balance valve, is an intuitive and simple flow regulation and control device. By applying a flow regulating valve in a pipe network, the flow rate can be directly set according to the design. Under the action of water, the valve can automatically eliminate the remaining head of the pipeline and the flow deviation caused by pressure fluctuations. No matter how the system pressure changes, the set flow rate remains unchanged. These functions of the valve enable the flow regulation of the pipe network to be completed once, turning the network regulation work into a simple flow distribution, and effectively solving the hydraulic imbalance of the pipe network. The self-acting balance valve is mainly applied to water systems such as central heating (cooling), etc., to distribute the pipe network flow rate as required, eliminate the hydraulic imbalance of the water system, and solve the problem of uneven heating and cooling.

[0003] The self-acting balance valve mainly includes an active adjustment part and an automatic adjustment part. The active adjustment part is used to set the flow rate, and the automatic adjustment part is used to maintain the flow rate at the set value when the system pressure changes.

[0004] At present, most of the active adjustment parts are in the form of ball valves, that is, composed of a valve ball and a matching valve seat. However, due to factors such as the large area of the mating surface between the valve ball and the valve seat and the high requirement for mating accuracy, the production process is difficult and the production cost is high. Content of the Utility Model

[0005] The utility model provides a self-acting balance valve, aiming to solve the technical problems of the large production process difficulty and high production cost of the active adjustment part of the existing self-acting balance valve.

[0006] To achieve the above object, the technical solution adopted by the utility model is: to provide a self-acting balance valve, including:

[0007] A valve body, provided with a first cavity, a second cavity, a third cavity, and a pressure sensing cavity. The first cavity is communicated with the second cavity through a first valve port, the third cavity is communicated with the second cavity through a second valve port, the pressure sensing cavity is conducted with the first cavity through a pressure guiding pipe, and is separated from the second cavity by a diaphragm;

[0008] The active adjustment component includes a first valve stem, a first valve core, and a first valve seat. The first valve seat is arranged between the first cavity and the second cavity and is connected to the valve body. The first valve core is a valve plate and is arranged within the first valve seat. The first valve stem is rotationally engaged with the valve body, with one end connected to the first valve core and the other end protruding from the valve body. The first valve core has the freedom to rotate around the axis of the valve plate, and the opening degree of the first valve port is adjusted by rotation.

[0009] The automatic adjustment component is arranged between the second cavity and the third cavity and is connected to the valve body, and is used to automatically adjust the opening degree of the second valve port according to the pressure difference between the pressure sensing cavity and the second cavity; and

[0010] The locking component is connected to the valve body and is also connected to the first valve stem, and is used to lock the first valve stem.

[0011] In a possible implementation manner of the self-acting balance valve provided by the present utility model, the first valve seat is provided with a circular cavity, the first valve core is arranged within the circular cavity, and the gap between the first valve core and the circular cavity is the first valve port.

[0012] In a possible implementation manner of the self-acting balance valve provided by the present utility model, when the first valve core is perpendicular to the liquid flow direction, the first valve core is in sealing cooperation with the valve body.

[0013] In a possible implementation manner of the self-acting balance valve provided by the present utility model, when the first valve core is perpendicular to the liquid flow direction, the edge of the first valve core is spaced from the valve body.

[0014] In a possible implementation manner of the self-acting balance valve provided by the present utility model, the automatic adjustment component includes a second valve stem, a second valve core, and a second valve seat. The second valve seat is arranged between the second cavity and the third cavity and is connected to the valve body. The second valve port is provided on the second valve seat. The second valve stem is elastically arranged within the valve body and is connected to the diaphragm. The second valve core is connected to the second valve stem and is in sliding cooperation with the second valve seat, and is used to automatically adjust the opening degree of the second valve port according to the pressure difference between the pressure sensing cavity and the third cavity.

[0015] In a possible implementation manner of the self-acting balance valve provided by the present utility model, the second valve seat has a cylindrical structure, with one end connected to the valve body and the other end closed. The second valve port penetrates through the radial two sides of the second valve seat.

[0016] In a possible implementation manner of the self-acting balance valve provided by the present utility model, the second valve core includes two valve plugs, the two valve plugs are connected to the second valve rod, and are adapted to cooperate with the two second valve ports of the second valve seat respectively; the valve plug includes a sealing piece and a plurality of guiding ribs surrounding the second valve rod and connected to the sealing piece; the sealing piece is adapted to be in sealing cooperation with the second valve port, and the guiding ribs are in sliding cooperation with the second valve port.

[0017] In a possible implementation manner of the self-acting balance valve provided by the present utility model, the automatic adjustment assembly further includes a spring and a baffle plate. The baffle plate is arranged between the diaphragm and the valve plug and is connected to the valve body; the spring is arranged between the diaphragm and the baffle plate and is sleeved on the second valve rod. One end of the spring is connected to the second valve rod, and the other end is connected to the baffle plate.

[0018] In a possible implementation manner of the self-acting balance valve provided by the present utility model, the locking assembly includes a limiting plate, a connecting rod, a limiting bolt, a cushion block and a limiting nut. The limiting plate is connected to the valve body and is provided with an arc-shaped limiting groove. The center of the arc-shaped limiting groove coincides with the axis of the first valve rod; one end of the connecting rod is connected to the first valve rod, and the other end is located above the arc-shaped limiting groove. The limiting bolt passes through the connecting rod and the arc-shaped limiting groove. The cushion block is arranged between the connecting rod and the limiting plate and is sleeved on the limiting bolt. The two ends of the cushion block are respectively abutted against the connecting plate and the limiting plate; the limiting nut is arranged on one side of the limiting plate facing away from the head of the limiting bolt and is in threaded cooperation with the limiting bolt to lock the rotation angle of the first valve rod.

[0019] In a possible implementation manner of the self-acting balance valve provided by the present utility model, the locking assembly further includes an indicating rod. A plurality of indicating grooves are formed on the limiting plate, and each indicating groove corresponds to an opening degree of a first valve port. The indicating rod is parallel to the axis of the first valve rod and is connected to the connecting rod.

[0020] The beneficial effects of the self-acting balance valve provided by the present utility model are as follows: Compared with the prior art, for the self-acting balance valve provided by the present utility model, the active adjustment assembly is composed of a valve plate and a first valve seat matching therewith, and the rotation angles of the valve rod and the valve plate are locked through the locking assembly, avoiding the automatic rotation of the valve plate under the impact of water flow. Compared with the existing valve ball and the valve seat matching therewith, due to factors such as the smaller area of the matching surface between the valve plate and the first valve seat matching therewith and the lower requirement for the matching precision, the production process is less difficult and the production and processing cost is lower. Description of the Drawings

[0021] Figure 1Schematic three - dimensional structure diagram of the self - acting balance valve provided by the embodiment of the present utility model;

[0022] Figure 2 is Figure 1 the enlarged view of part A in

[0023] Figure 3 Schematic cross - sectional structure diagram of the self - acting balance valve provided by the embodiment of the present utility model;

[0024] Explanation of reference numerals:

[0025] 10, valve body; 11, first cavity; 12, second cavity; 13, third cavity;

[0026] 14, pressure sensing cavity; 15, diaphragm; 16, pressure guiding pipe; 21, first valve stem;

[0027] 22, first valve core; 23, first valve seat; 31, second valve stem;

[0028] 321, sealing piece; 322, guiding rib; 33, second valve seat;

[0029] 34, spring; 35, baffle; 41, limiting plate; 411, limiting groove; 412, indicating groove;

[0030] 42, connecting rod; 43, indicating rod; 44, limiting bolt; 45, cushion block; 46, limiting nut. Detailed implementation manners

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way limits the present application or its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

[0035] In the description of the present application, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0036] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figure for the device. For example, if the device in the attached drawing is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways, and corresponding interpretations should be made for the spatial relative descriptions used here.

[0037] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is merely for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of this application.

[0038] Please refer to Figures 1 to 3 , and now the self - acting balance valve provided by the present utility model will be described. The self - acting balance valve includes a valve body 10, an active adjustment assembly, an automatic adjustment assembly, and a locking assembly. The valve body 10 is provided with a first cavity 11, a second cavity 12, a third cavity 13, and a pressure sensing cavity 14. The first cavity 11 communicates with the second cavity 12 through a first valve port, the third cavity 13 communicates with the second cavity 12 through a second valve port, the pressure sensing cavity 14 is conducted with the first cavity 11 through a pressure guiding pipe 16 and is separated from the second cavity 12 by a diaphragm 15; the active adjustment assembly includes a first valve stem 21, a first valve core 22, and a first valve seat 23. The first valve seat 23 is arranged between the first cavity 11 and the second cavity 12 and is connected to the valve body 10; the first valve core 22 is a valve plate arranged inside the first valve seat 23; the first valve stem 21 is rotationally matched with the valve body 10, one end is connected to the first valve core 22, and the other end protrudes from the valve body 10; the first valve core 22 has the freedom to rotate around the axis of the valve plate and adjusts the opening degree of the first valve port by rotation; the automatic adjustment assembly is arranged between the second cavity 12 and the third cavity 13 and is connected to the valve body 10 to automatically adjust the opening degree of the second valve port according to the pressure difference between the pressure sensing cavity 14 and the second cavity 12; the locking assembly is connected to the valve body 10 and is connected to the first valve stem 21 to lock the first valve stem 21.

[0039] The beneficial effects of the self-acting balance valve provided by the present utility model are as follows: Compared with the prior art, for the self-acting balance valve provided by the present utility model, the active adjustment assembly is composed of a valve plate and a first valve seat 23 that matches it, and the rotation angles of the valve stem and the valve plate are locked through a locking assembly to prevent the valve plate from automatically rotating under the impact of water flow. Compared with the existing valve ball and its matching valve seat, due to factors such as the smaller area of the mating surface and the lower requirement for mating precision between the valve plate and the first valve seat 23 that matches it, the production process is less difficult and the production and processing cost is lower.

[0040] As Figure 1 and Figure 3 shown, in a specific implementation manner of the self-acting balance valve provided by the embodiment of the present utility model, the first valve seat 23 is provided with a circular cavity, the first valve core 22 is arranged in the circular cavity, and the gap between the first valve core 22 and the circular cavity is the first valve port.

[0041] In a specific implementation manner of the self-acting balance valve provided by the embodiment of the present utility model, when the first valve core 22 is perpendicular to the liquid flow direction, the first valve core 22 is in sealing fit with the valve body 10.

[0042] Specifically, when the specification of the valve is between DN20 and DN80, the first valve core 22 can be in sealing fit with the valve body 10, that is, the first valve port can be completely closed.

[0043] In a specific implementation manner of the self-acting balance valve provided by the embodiment of the present utility model, when the first valve core 22 is perpendicular to the liquid flow direction, the edge of the first valve core 22 is spaced from the valve body 10.

[0044] Specifically, when the specification of the valve is above DN80, when the first valve core 22 is perpendicular to the liquid flow direction, the edge of the first valve core 22 is spaced from the valve body 10, that is, the first valve port cannot be completely closed; the gap between the edge of the first valve core 22 and the valve body 10 is set according to the actual situation to meet the relevant specifications.

[0045] It should be noted that since the first valve core 22 is a valve plate, when it is perpendicular to the liquid flow direction, the force-bearing area is large; therefore, if the first valve port is completely closed, a large force is required to open it, which is not convenient for use. And the relevant specifications stipulate that the minimum flow rate of the self-acting balance valve is greater than zero. Therefore, it is also in line with the specifications that the first valve port is not completely closed; for example, for a DN80 self-acting balance valve, the flow rate range is 5 - 25 m 3 / h.

[0046] As Figure 1 and Figure 3As shown, in a specific implementation of the self-acting balance valve provided in the embodiment of the present utility model, the automatic adjustment assembly includes a second valve stem 31, a second valve core, and a second valve seat 33. The second valve seat 33 is arranged between the second cavity 12 and the third cavity 13 and is connected to the valve body 10. The second valve seat 33 is provided with a second valve port. The second valve stem 31 is elastically arranged in the valve body 10 and is connected to the diaphragm 15. The second valve core is connected to the second valve stem 31 and is in sliding fit with the second valve seat 33 to automatically adjust the opening degree of the second valve port according to the pressure difference between the pressure sensing cavity 14 and the third cavity 13.

[0047] Specifically, as Figure 1 and Figure 3 shown, in a specific implementation of the self-acting balance valve provided in the embodiment of the present utility model, the second valve seat 33 has a cylindrical structure, one end is connected to the valve body 10, and the other end is closed. The second valve port penetrates through the radial sides of the second valve seat 33.

[0048] The second valve seat 33 is composed of a steel pipe. One end of the steel pipe is closed, and the other end is externally processed with threads. The steel pipe is threadedly connected to the valve body 10 to facilitate the production, manufacturing, and installation of the second valve seat 33.

[0049] As Figure 1 and Figure 3 shown, in a specific implementation of the self-acting balance valve provided in the embodiment of the present utility model, the second valve core includes two valve plugs. The two valve plugs are connected to the second valve stem 31 and are adapted to cooperate with the two second valve ports of the second valve seat 33 respectively. The valve plug includes a sealing piece 321 and a plurality of guiding ribs 322 that surround the second valve stem 31 and are connected to the sealing piece 321. The sealing piece 321 is adapted to be in sealing fit with the second valve port, and the guiding ribs 322 are in sliding fit with the second valve port to play a guiding role and guide the movement of the valve plug.

[0050] As Figure 1 and Figure 3 shown, in a specific implementation of the self-acting balance valve provided in the embodiment of the present utility model, the automatic adjustment assembly further includes a spring 34 and a baffle 35. The baffle 35 is arranged between the diaphragm 15 and the valve plug and is connected to the valve body 10. The spring 34 is arranged between the diaphragm 15 and the baffle 35 and is sleeved on the second valve stem 31. One end of the spring 34 is connected to the second valve stem 31, and the other end is connected to the baffle 35.

[0051] Specifically, the inner diameter of the spring 34 is slightly larger than the diameter of the second valve stem 31 to avoid radial deviation when the spring 34 is compressed and ensure the valve accuracy. By comparing the pressure difference on both sides of the diaphragm 15 with the elastic force of the spring 34, the second valve stem 31 and the second valve core linked to the diaphragm 15 are adjusted to automatically change the opening degree of the second valve port according to different pressure differences.

[0052] As Figure 1and Figure 2 As shown in Figure 2 , in a specific implementation manner of the self-acting balance valve provided by the embodiment of the present invention, the locking assembly includes a limit plate 41, a connecting rod 42, a limit bolt 44, a cushion block 45 and a limit nut 46. The limit plate 41 is connected to the valve body 10 and is provided with an arc-shaped limit groove 411. The center of the arc-shaped limit groove 411 coincides with the axis of the first valve stem 21. One end of the connecting rod 42 is connected to the first valve stem 21, and the other end is located above the arc-shaped limit groove 411. The limit bolt 44 passes through the connecting rod 42 and the arc-shaped limit groove 411. The cushion block 45 is arranged between the connecting rod 42 and the limit plate 41 and is sleeved on the limit bolt 44. The two ends of the cushion block 45 are respectively abutted against the connecting plate and the limit plate 41. The limit nut 46 is arranged on one side of the limit plate 41 facing away from the head of the limit bolt 44 and is in threaded cooperation with the limit bolt 44 to lock the rotation angle of the first valve stem 21.

[0053] Further, as Figure 1 and Figure 2 shown, in a specific implementation manner of the self-acting balance valve provided by the embodiment of the present invention, the locking assembly further includes an indicating rod 43. The limit plate 41 is provided with a plurality of indicating grooves 412. Each indicating groove 412 corresponds to the opening degree of a first valve port. The indicating rod 43 is parallel to the axis of the first valve stem 21 and is connected to the connecting rod 42.

[0054] Specifically, scales corresponding to the opening degrees of the valve ports are set near each indicating groove 412. When the indicating rod 43 is aligned with one of the indicating grooves 412, the scale corresponding to the indicating groove 412 represents the opening degree of the first valve port at this time.

[0055] It should be noted that when it is necessary to adjust the set flow rate, first loosen the limit nut 46, and then the connecting rod 42 can be swung to drive the first valve stem 21 and the first valve core 22 to rotate, so as to adjust the opening degree of the first valve port. After adjusting to the desired valve port opening degree, tighten the limit nut 46, and the connecting rod 42 can be fixed to the limit plate 41, thereby locking the first valve stem 21 and the first valve core 22 and locking the opening degree of the first valve port, effectively preventing the first valve core 22 from rotating automatically under the impact of water flow, resulting in an automatic increase in the opening degree of the first valve port.

[0056] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-operated balancing valve, characterized in that: include: The valve body is provided with a first cavity, a second cavity, a third cavity and a pressure sensing cavity, the first cavity is connected with the second cavity through a first valve port, the third cavity is connected with the second cavity through a second valve port, the pressure sensing cavity is connected with the first cavity through a pressure-conducting pipe, and is separated from the second cavity by a diaphragm; An active regulating assembly comprises a first valve stem, a first valve core and a first valve seat, wherein the first valve seat is arranged between the first cavity and the second cavity and connected to the valve body; the first valve core is a valve plate and is arranged in the first valve seat; the first valve stem is rotatably matched with the valve body, one end of the first valve stem is connected to the first valve core and the other end protrudes out of the valve body; The first valve core has the freedom to rotate around the axis of the valve plate, and the opening of the first valve port is adjusted by rotating; an automatic adjustment component, disposed between the second cavity and the third cavity, connected to the valve body, and used for automatically adjusting the opening of the second valve port according to the pressure difference between the pressure sensing cavity and the second cavity; as well as A locking assembly is connected to the valve body and the first valve stem, and is used to lock the first valve stem.

2. The self-operated balancing valve according to claim 1, characterized in that: The first valve seat is provided with a circular cavity, the first valve core is arranged in the circular cavity, and the gap between the first valve core and the circular cavity is the first valve port.

3. The self-operated balancing valve according to claim 1, characterized in that: When the first valve core is perpendicular to the flow direction of the liquid, the first valve core is sealed and matched with the valve body.

4. The self-operated balancing valve according to claim 1, characterized in that: When the first valve core is perpendicular to the flow direction of the liquid, the edge of the first valve core is spaced apart from the valve body.

5. The self-operated balancing valve according to claim 1, characterized in that: The automatic adjustment component includes a second valve stem, a second valve core and a second valve seat. The second valve seat is arranged between the second cavity and the third cavity and is connected to the valve body. The second valve seat is provided with the second valve port. The second valve stem is elastically arranged in the valve body and is connected to the diaphragm. The second valve core is connected to the second valve stem and slidably cooperates with the second valve seat, so as to automatically adjust the opening of the second valve port according to the pressure difference between the pressure sensing cavity and the third cavity.

6. The self-operated balancing valve according to claim 5, characterized in that: The second valve seat is in a cylindrical structure, one end of which is connected to the valve body and the other end is closed; the second valve port runs through both radial sides of the second valve seat.

7. The self-operated balancing valve according to claim 6, characterized in that: The second valve core includes two valve plugs, which are connected to the second valve stem and are suitable for respectively cooperating with the two second valve ports of the second valve seat; the valve plug includes a sealing plate and a plurality of guide ribs surrounding the second valve stem and connected to the sealing plate; the sealing plate is suitable for sealingly cooperating with the second valve port, and the guide ribs are slidingly cooperating with the second valve port.

8. The self-operated balancing valve according to claim 7, characterized in that: The automatic adjustment component also includes a spring and a baffle, wherein the baffle is arranged between the diaphragm and the valve plug and connected to the valve body; the spring is arranged between the diaphragm and the baffle and is sleeved on the second valve stem, one end of the spring is connected to the second valve stem, and the other end is connected to the baffle.

9. The self-operated balancing valve according to claim 1, characterized in that: The locking assembly includes a limit plate, a connecting rod, a limit bolt, a cushion block and a limit nut. The limit plate is connected to the valve body and is provided with an arc-shaped limit groove, the center of which coincides with the axis of the first valve stem; one end of the connecting rod is connected to the first valve stem, and the other end is located on the upper side of the arc-shaped limit groove. The limit bolt passes through the connecting rod and the arc-shaped limit groove. The cushion block is arranged between the connecting rod and the limit plate and is sleeved on the limit bolt. The two ends of the cushion block are respectively abutted against the connecting plate and the limit plate; the limit nut is arranged on the side of the limit plate facing away from the head of the limit bolt, and cooperates with the limit bolt thread to lock the rotation angle of the first valve stem.

10. The self-operated balancing valve according to claim 9, characterized in that: The locking assembly also includes an indicator rod. The limit plate is provided with a plurality of indicator grooves, each of which corresponds to an opening of the first valve port. The indicator rod is parallel to the axis of the first valve stem and is connected to the connecting rod.

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