Constant flow valve

Abstract

The utility model discloses a constant flow valve which comprises a valve body and a valve core, the valve body is provided with a fluid inlet and a fluid outlet which allow fluid to pass through, and the valve core comprises a valve seat and a valve plate. Fluid enters from the fluid inlet, flows through the valve element in the flow channel and finally flows out from the fluid outlet, the fluid passes through a gap between the valve block and the axial end face of the installation position, when the pressure of the fluid flowing in from the fluid inlet is increased, the valve seat is pushed to move in the direction close to the valve block, and the valve block is loaded through the elastic element; the distance between the valve plate and the axial end face of the mounting position is reduced, and excessive flow is avoided; when the pressure of fluid flowing into the fluid inlet is reduced, the valve seat moves in the direction away from the valve plate under the action force of deformation recovery of the elastic element, the distance between the valve plate and the axial end face of the mounting position is increased, and the fluid can keep constant flow. The valve plate is formed by stacking at least two reeds, the adjusting precision of the constant flow valve is improved, the fluid flow is prevented from being influenced by inlet fluid pressure fluctuation, and the flow speed is kept constant.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, in particular to a constant flow valve. Background Art

[0002] In the production process involving fluid application, fluid transportation is a crucial link. Fluid transportation refers to the delivery of fluid from one place to another along the pipeline at a certain flow rate. In fluid application and transportation systems, control valves are used to control the flow and transportation status of fluids.

[0003] A constant flow valve is a regulating valve with a constant flow function. It is a valve that combines a self-powered pressure difference control device and a flow control device. In order to ensure constant flow of fluid, a constant flow valve is often used. The constant flow valve in the prior art has a complex structure, high cost, and a large size, which limits its promotion and application. Utility Model Content

[0004] The purpose of the utility model is to provide a constant flow valve to solve the problems existing in the above-mentioned prior art, simplify the structure of the fluid delivery system, and improve the adaptability of the constant flow valve.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The utility model provides a constant flow valve, comprising:

[0007] A valve body, the valve body having a fluid inlet and a fluid outlet for allowing fluid to pass through, the fluid inlet and the fluid outlet being connected via a flow passage;

[0008] A valve core, the valve core includes a valve seat and a valve plate, the valve seat is slidably arranged in the flow channel, the valve seat has a through hole allowing fluid to pass through; a side of the valve body close to the fluid outlet has a mounting position adapted to the valve plate, the valve plate is arranged in the mounting position, the valve plate includes at least two stacked reed plates, the edges of the reed plates have notches, and adjacent reed plates are staggered so that the conveyed fluid passes through the gap between the notch and the axial end face of the mounting position, the valve plate can produce elastic deformation to change the distance between the reed plate and the axial end face of the mounting position; an elastic element is arranged between the valve plate and the valve seat.

[0009] Preferably, the notch is semicircular, triangular or polygonal.

[0010] Preferably, there are a plurality of notches, and all of the notches are evenly distributed circumferentially around the axis of the spring leaf.

[0011] Preferably, all the reed sheets are stacked and riveted together, and the riveting axis of the reed sheet coincides with the axis of the reed sheet.

[0012] Preferably, the staggered angles between the reeds are adjustable.

[0013] Preferably, the valve body includes a sliding section and a positioning section, the sliding section is connected to the positioning section, the sliding section is slidably arranged in the flow channel and is arranged close to the fluid inlet, the positioning section is arranged close to the valve plate, the elastic element is a spring, one end of the elastic element is sleeved on the outside of the positioning section, and the other end of the elastic element is against the valve plate.

[0014] Preferably, the positioning section is a conical structure, and the end of the positioning section with a larger diameter is connected to the sliding section.

[0015] Preferably, a retaining ring groove is provided at one end of the valve body close to the fluid inlet, and a spring retaining ring is provided in the retaining ring groove to limit the extreme sliding position of the sliding section.

[0016] Preferably, the fluid inlet and the fluid outlet both have connecting internal threads.

[0017] Preferably, the valve body is a hexagonal column structure.

[0018] Compared with the prior art, the utility model has achieved the following technical effects: the constant flow valve of the utility model comprises a valve body and a valve core, the valve body has a fluid inlet and a fluid outlet for allowing fluid to pass through, the fluid inlet and the fluid outlet are connected by a flow channel; the valve core comprises a valve seat and a valve plate, the valve seat can be slidably arranged in the flow channel, and the valve seat has a through hole for allowing fluid to pass through; a mounting position adapted to the valve plate is provided on one side of the valve body close to the fluid outlet, the valve plate is arranged in the mounting position, the valve plate comprises at least two stacked reed plates, the edges of the reed plates have notches, and adjacent reed plates are staggered so that the conveyed fluid passes through the gap between the notch and the axial end face of the mounting position, and the valve plate can produce elastic deformation to change the distance between the reed plate and the axial end face of the mounting position; an elastic element is arranged between the valve plate and the valve seat.

[0019] In the constant flow valve of the utility model, the fluid enters from the fluid inlet, flows through the valve core in the flow channel, and finally flows out from the fluid outlet. Specifically, the fluid passes through the gap between the valve plate and the axial end face of the installation position. When the fluid pressure flowing into the fluid inlet increases, the valve seat is pushed to move in the direction close to the valve plate, and the valve plate is loaded through the elastic element, and the distance between the valve plate and the axial end face of the installation position is reduced to avoid excessive flow; when the fluid pressure flowing into the fluid inlet decreases, under the action of the elastic element to restore the deformation, the valve seat moves in the direction away from the valve plate, and the distance between the valve plate and the axial end face of the installation position is increased, so that the fluid can maintain a constant flow. The valve plate is stacked by at least two spring plates to further improve the adjustment accuracy of the constant flow valve, to avoid the fluid flow being affected by the inlet fluid pressure fluctuation to the greatest extent, and to keep the flow rate constant. The constant flow valve of the utility model has a simple structure and reliable automatic adjustment. It can be applied to various fluid delivery systems, and improves the adaptability of the constant flow valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is an axonometric schematic diagram of the constant flow valve disclosed in the embodiment of the utility model;

[0022] Figure 2 It is a front view schematic diagram of the constant flow valve disclosed in the embodiment of the utility model;

[0023] Figure 3 for Figure 2 Schematic diagram of the section along the AA direction;

[0024] Figure 4 It is a side view schematic diagram of the constant flow valve disclosed in the embodiment of the utility model.

[0025] In the figure: 1. valve body; 2. valve core; 3. fluid inlet; 4. fluid outlet; 5. valve seat; 6. valve plate; 7. elastic element; 8. mounting position; 9. sliding section; 10. positioning section; 11. retaining ring groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The purpose of the utility model is to provide a constant flow valve to solve the problems existing in the above-mentioned prior art, simplify the structure of the fluid delivery system, and improve the adaptability of the constant flow valve.

[0028] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] The utility model provides a constant flow valve, comprising a valve body 1 and a valve core 2, the valve body 1 having a fluid inlet 3 and a fluid outlet 4 for allowing fluid to pass through, the fluid inlet 3 and the fluid outlet 4 being connected by a flow passage; the valve core 2 comprising a valve seat 5 and a valve plate 6, the valve seat 5 being slidably arranged in the flow passage, the valve seat 5 having a through hole for allowing fluid to pass through; a mounting position 8 matched with the valve plate 6 is provided on one side of the valve body 1 close to the fluid outlet 4, the valve plate 6 being arranged in the mounting position 8, the valve plate 6 comprising at least two stacked reed plates, the edges of the reed plates having notches, the adjacent reed plates being staggered so that the conveyed fluid passes through the gap between the notches and the axial end faces of the mounting positions 8, the valve plate 6 being able to produce elastic deformation so as to change the spacing between the reed plate and the axial end faces of the mounting positions 8; an elastic element 7 is arranged between the valve plate 6 and the valve seat 5.

[0030] In the constant flow valve of the utility model, the fluid enters from the fluid inlet 3, flows through the valve core 2 in the flow channel, and finally flows out from the fluid outlet 4. Specifically, the fluid passes through the gap between the valve plate 6 and the axial end face of the installation position 8. When the pressure of the fluid flowing into the fluid inlet 3 increases, the valve seat 5 is pushed to move in the direction close to the valve plate 6, and the valve plate 6 is loaded through the elastic element 7, and the distance between the valve plate 6 and the axial end face of the installation position 8 is reduced to avoid excessive flow; when the pressure of the fluid flowing into the fluid inlet 3 decreases, under the action of the elastic element 7 to restore the deformation, the valve seat 5 moves in the direction away from the valve plate 6, and the distance between the valve plate 6 and the axial end face of the installation position 8 is increased, so that the fluid can maintain a constant flow. The valve plate 6 is stacked by at least two spring plates to further improve the adjustment accuracy of the constant flow valve, to avoid the fluid flow being affected by the inlet fluid pressure fluctuation to the greatest extent, and to keep the flow rate constant. The constant flow valve of the utility model realizes automatic flow adjustment by using the valve core 2, has a simple structure, can be applied to various fluid delivery systems, and improves the adaptability of the constant flow valve.

[0031] In practical applications, the notch can be set to a semicircular, triangular or polygonal shape, and the appropriate notch shape can be selected according to the actual working conditions to reduce the difficulty of reed production and processing and save the production cost of the constant flow valve.

[0032] In order to improve the force uniformity of the valve plate 6, there are multiple notches, and all the notches are evenly distributed around the axis of the spring plate.

[0033] In other specific embodiments of the present invention, all the reeds are stacked and riveted, the riveting axis of the reed coincides with the axis of the reed, and the centers of the reeds are riveted together, which improves the overall structural strength of the valve plate 6, while avoiding affecting the elastic deformation of the reed, and improving the working reliability of the constant flow valve. It should also be noted here that the reed can be made of spring steel to ensure the normal deformation of the reed to adjust the distance between it and the axial end face of the installation position 8, while enhancing the structural strength of the reed.

[0034] It also needs to be explained that the staggered angle between the reeds can be adjusted to adjust the flow area of ​​the valve plate 6. The reeds are stacked and riveted together coaxially. The staggered angle between the reeds can be adjusted by rotating the reeds, which is easy to operate and improves the flexibility and adaptability of the constant flow valve.

[0035] Specifically, the valve body 1 includes a sliding section 9 and a positioning section 10. The sliding section 9 is connected to the positioning section 10. The sliding section 9 is slidably arranged in the flow channel and is arranged close to the fluid inlet 3. The positioning section 10 is arranged close to the valve plate 6. The elastic element 7 is a spring. One end of the elastic element 7 is sleeved on the outside of the positioning section 10, and the other end of the elastic element 7 is against the valve plate 6. The valve body 1 is provided with a sliding section 9, which provides a guide for the reciprocating sliding of the valve body 1 in the flow channel, thereby enhancing the sliding reliability of the valve body 1. At the same time, the valve body 1 also includes a positioning section 10, which is used to fix the position of the elastic element 7 to avoid dislocation of the elastic element 7, ensure that the elastic element 7 can apply a force to the valve plate 6, and improve the working reliability of the constant flow valve.

[0036] In this specific embodiment, the positioning section 10 is a conical structure, and the end of the positioning section 10 with a larger diameter is connected to the sliding section 9. One end of the elastic element 7 is sleeved on the positioning section 10 to provide a limiting effect for the elastic element 7. At the same time, the conical structure can effectively avoid affecting the expansion and contraction of the elastic element 7.

[0037] In addition, in order to prevent the valve body 1 from slipping, a retaining ring groove 11 is provided at one end of the valve body 1 near the fluid inlet 3, and a spring retaining ring is provided in the retaining ring groove 11 to limit the extreme sliding position of the sliding section 9 and improve the working stability and reliability of the valve core 2. It is also necessary to explain here that the installation position 8 is a stepped hole with a simple structure and convenient installation, and the valve plate 6 is not easy to be misplaced under the action of fluid pressure.

[0038] Furthermore, both the fluid inlet 3 and the fluid outlet 4 have connecting internal threads, which facilitates the connection of the constant flow valve with other pipelines of the fluid delivery system. The connecting internal threads can be sealed threads to avoid leakage.

[0039] In addition, the valve body 1 is a hexagonal column structure, which is convenient for disassembling and assembling the constant flow valve using operating tools such as a wrench, and the operation is convenient and space-saving, further improving the adaptability of the constant flow valve.

[0040] In the constant flow valve of the utility model, when the fluid pressure fluctuates, the valve seat 5 reciprocates, and the elastic element 7 is used to load the valve plate 6, so that the valve plate 6 composed of a plurality of reeds is deformed, and the distance between the valve plate 6 and the sealing surface (i.e., the axial end surface of the installation position 8) is changed, thereby keeping the flow constant. The constant flow valve of the utility model realizes automatic flow adjustment by using the valve core 2, has a simple structure, does not need to set a separate control mechanism, and has a wide range of applications.

[0041] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A constant flow valve, characterized in that: include: A valve body, the valve body having a fluid inlet and a fluid outlet for allowing fluid to pass through, the fluid inlet and the fluid outlet being connected via a flow passage; A valve core, the valve core includes a valve seat and a valve plate, the valve seat is slidably arranged in the flow channel, the valve seat has a through hole allowing fluid to pass through; a side of the valve body close to the fluid outlet has a mounting position adapted to the valve plate, the valve plate is arranged in the mounting position, the valve plate includes at least two stacked reed plates, the edges of the reed plates have notches, and adjacent reed plates are staggered so that the conveyed fluid passes through the gap between the notch and the axial end face of the mounting position, the valve plate can produce elastic deformation to change the distance between the reed plate and the axial end face of the mounting position; an elastic element is arranged between the valve plate and the valve seat.

2. The constant flow valve according to claim 1, characterized in that: The notch is semicircular, triangular or polygonal.

3. The constant flow valve according to claim 1, characterized in that: There are multiple notches, and all of the notches are evenly distributed around the axis of the spring.

4. The constant flow valve according to claim 1, characterized in that: All the reed sheets are stacked and riveted together, and the riveting axes of the reed sheets coincide with the axes of the reed sheets.

5. The constant flow valve according to any one of claims 1 to 4, characterized in that: The staggered angle between the reeds can be adjusted.

6. The constant flow valve according to claim 1, characterized in that: The valve body includes a sliding section and a positioning section, the sliding section is connected to the positioning section, the sliding section is slidably arranged in the flow channel and is arranged close to the fluid inlet, the positioning section is arranged close to the valve plate, the elastic element is a spring, one end of the elastic element is sleeved on the outside of the positioning section, and the other end of the elastic element is against the valve plate.

7. The constant flow valve according to claim 6, characterized in that: The positioning section is a cone-shaped structure, and the end of the positioning section with a larger diameter is connected to the sliding section.

8. The constant flow valve according to claim 6, characterized in that: A retaining ring groove is arranged at one end of the valve body close to the fluid inlet, and a spring retaining ring is arranged in the retaining ring groove to limit the extreme sliding position of the sliding section.

9. The constant flow valve according to claim 1, characterized in that: The fluid inlet and the fluid outlet both have connecting internal threads.

10. The constant flow valve according to claim 1, characterized in that: The valve body is a hexagonal column structure.

Images