Flow and pressure regulating valve

Abstract

The utility model discloses a flow and pressure regulating valve, belongs to the technical field of pressure regulating valves, and solves the problem that the position needs to be matched with other structures to ensure the sealing effect, otherwise, the arrangement of a through hole at the position also can cause the reduction of the sealing performance at the position of a diaphragm. The valve connecting pipe is detachably connected with the valve body, the diaphragm is fixedly connected between the valve body and the valve connecting pipe, the upper inner pressing plate and the lower inner pressing plate are clamped on the two sides of the diaphragm, the lower end face of the lower inner pressing plate is fixedly connected with a valve rod located in the valve body, and the section of the upper inner pressing plate and the section of the lower inner pressing plate are both in a non-circular shape. When the diaphragm is clamped, magnetic force between the upper pressing plate and the lower pressing plate is adopted for attraction, the magnetic force is smaller than clamping force generated when the upper pressing plate and the lower pressing plate are fastened through bolts and nuts, and therefore the phenomenon that the diaphragm loses elasticity due to excessive compression is avoided, the design avoids trepanning of the diaphragm, the potential leakage risk is reduced, introduction of a polygonal structure is reduced, and the reliability of the diaphragm is improved. The stability when the upper pressing plate and the lower pressing plate clamp the diaphragm is ensured, and the diaphragm is prevented from rotating.

Description

Technical Field

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

[0002] A pressure regulating valve is a valve that automatically adjusts fluid pressure. It is mainly used in fluid systems in industrial and civil fields, such as water supply and gas. Its core function is to reduce the upstream pressure of the fluid to a stable downstream pressure level and maintain this set pressure during the operation of the entire system. The pressure regulating valve senses the fluctuation of downstream pressure through internal mechanical components such as springs, pistons or diaphragms, and automatically adjusts the opening degree of the valve to adapt to the pressure changes. The design of a pressure regulating valve usually includes key components such as the valve body, valve seat, valve core, spring and adjusting screw. The valve body bears the fluid pressure, and the valve seat and valve core cooperate to form a sealing surface to control the flow of the fluid. The spring provides the necessary force to maintain the preset pressure difference, while the adjusting screw is used to set and adjust the output pressure. In addition, the pressure regulating valve may also be equipped with additional functions such as pressure gauge interface, overpressure protection device and remote control interface to meet different application requirements. When selecting a pressure regulating valve, it is necessary to consider its operating pressure range, flow capacity and the characteristics of the medium, such as temperature and corrosiveness, to ensure that the valve can operate reliably under specific working conditions. At the same time, regular maintenance and inspection are also important measures to ensure the long-term and stable operation of the pressure regulating valve.

[0003] Among them, the diaphragm in the pressure regulating valve is firmly clamped by upper and lower diaphragm pressure plates using bolts and nuts, so that the bulging and deflation of the diaphragm can drive the control rod or valve stem to move. During the actual assembly, the diaphragm is kept in a flattened deformed state for a long time by providing a large force through bolts and nuts, which is easy to cause aging and reduce its sealing effect. At the same time, in order to cooperate with the connection of bolts and nuts, through holes need to be opened on the diaphragm and the diaphragm pressure plate to complete the insertion of the bolts. This place also needs to cooperate with other structures to ensure the sealing effect, otherwise the through hole setting at this place will also lead to a decrease in the sealing performance of the diaphragm.

[0004] Therefore, a flow regulating and pressure regulating valve is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a flow regulating and pressure regulating valve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A flow regulating and pressure regulating valve comprises a valve body, a valve connecting pipe detachably connected thereto, a diaphragm fixedly connected therebetween, and an upper inner pressure plate and a lower inner pressure plate clamped on both sides of the diaphragm, wherein the lower end surface of the lower inner pressure plate is fixedly connected to a valve stem located in the valve body, and the cross-sections of the upper inner pressure plate and the lower inner pressure plate are both non-circular.

[0008] Preferably, the cross-sections of the upper inner pressure plate and the lower inner pressure plate are both regular polygons.

[0009] Preferably, the upper inner pressure plate and the lower inner pressure plate are both provided with anti-slip grooves 1 on one side facing the diaphragm, and the anti-slip grooves 1 on the upper inner pressure plate and the lower inner pressure plate are arranged in a staggered manner.

[0010] Preferably, the outer rings of the upper inner pressure plate and the lower inner pressure plate are both provided with upper outer pressure plates and lower outer pressure plates for clamping the diaphragm, and there are spacing grooves between the upper inner pressure plate and the upper outer pressure plate, and between the lower inner pressure plate and the lower outer pressure plate.

[0011] Preferably, the upper outer pressure plate and the lower outer pressure plate are both provided with anti-slip grooves 2 on one side facing the diaphragm, the anti-slip grooves 2 on the upper outer pressure plate and the lower outer pressure plate are arranged alternately, and the anti-slip grooves 1 and 2 are arranged vertically.

[0012] Preferably, the upper inner pressure plate and the upper outer pressure plate are both made of magnets, and the lower inner pressure plate and the lower outer pressure plate are both made of metal materials.

[0013] Preferably, it also includes an upper connecting seat vertically limited in the valve connecting pipe, an elastic member, and an inner cylinder fixedly connected to the top surface of the upper inner pressure plate, wherein the elastic member is sleeved on the outer side of the upper connecting seat and the inner cylinder and is located between the upper inner pressure plate and the upper connecting seat.

[0014] Preferably, a sleeve is fixedly connected to the bottom surface of the lower inner pressure plate, and the upper end of the valve stem is embedded in the sleeve.

[0015] Preferably, the valve body is also fixedly connected with an inlet pipe communicating therewith.

[0016] The utility model has the following beneficial effects:

[0017] When the utility model clamps the diaphragm, the upper pressure plate and the lower pressure plate are attracted by the magnetic force between them, and the magnetic force is smaller than the clamping force when the upper pressure plate and the lower pressure plate are fixed by bolts and nuts, so that the diaphragm at that place will not lose its elasticity due to excessive flattening, and there is no need to drill holes in the diaphragm to avoid leakage caused by holes. The polygonal setting makes it difficult for the upper pressure plate and the lower pressure plate to rotate on the diaphragm when clamping the diaphragm, so that when the diaphragm is clamped, it is not only firm and not easy to be displaced, but also can avoid aging of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 The structure diagram of the diaphragm, upper pressure plate and lower pressure plate in the utility model is shown in FIG. Figure 1 ;

[0020] Figure 3 The structure diagram of the diaphragm, upper pressure plate and lower pressure plate in the utility model is shown in FIG. Figure 2 ;

[0021] Figure 4 It is a structural schematic diagram of the upper pressing plate in the utility model.

[0022] 1. Valve body; 2. Inlet pipe; 3. Flange seat; 4. Valve connecting pipe; 5. Upper connecting seat; 6. Elastic member; 7. Upper inner pressure plate; 8. Inner tube; 9. Upper outer pressure plate; 10. Diaphragm; 11. Lower inner pressure plate; 12. Lower outer pressure plate; 13. Sleeve; 14. Valve stem; 15. Spacer groove; 16. Anti-skid pattern 1; 17. Anti-skid pattern 2. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] A flow regulating and pressure regulating valve, such as Figure 1 As shown, it includes a valve body 1, a flange seat 3 fixedly connected to the valve body 1, a valve connecting pipe 4 detachably connected to the flange seat 3, a diaphragm 10 fixedly connected therebetween, and an upper pressure plate and a lower pressure plate clamped on both sides of the diaphragm 10. The valve body 1 is also fixedly connected to an inlet pipe 2 connected thereto.

[0025] It also includes an upper connecting seat 5 vertically limited in the valve connecting pipe 4, an elastic member 6, and an inner tube 8 fixedly connected to the top surface of the upper inner pressure plate 7. The elastic member 6 is sleeved on the outer side of the upper connecting seat 5 and the inner tube 8 and is located between the upper inner pressure plate 7 and the upper connecting seat 5. The elastic member 6 is a spring. Secondly, a screw block can be fixed in the valve connecting pipe 4 through a threaded structure to push the upper connecting seat 5 to perform vertical displacement.

[0026] like Figure 2-4As shown, the upper pressing plate includes an upper inner pressing plate 7 and an upper outer pressing plate 9, the lower pressing plate includes a lower inner pressing plate 11 and a lower outer pressing plate 12, and there are spacing grooves 15 between the upper inner pressing plate 7 and the upper outer pressing plate 9, and between the lower inner pressing plate 11 and the lower outer pressing plate 12. The upper inner pressing plate 7 and the lower inner pressing plate 11 are both provided with anti-slip grooves 16 on the side facing the diaphragm 10, and the anti-slip grooves 16 on the upper inner pressing plate 7 and the lower inner pressing plate 11 are staggered, and the upper outer pressing plate 9 and the lower outer pressing plate 12 are both provided with anti-slip grooves 17 on the side facing the diaphragm 10, and the anti-slip grooves 17 on the upper outer pressing plate 9 and the lower outer pressing plate 12 are staggered, and the anti-slip grooves 16 and the anti-slip grooves 17 are vertically arranged, the upper inner pressing plate 7 and the upper outer pressing plate 9 are both made of magnets, and the lower inner pressing plate 11 and the lower outer pressing plate 12 are both made of metal materials.

[0027] The cross-sections of the upper inner pressure plate 7 and the lower inner pressure plate 11 are both regular polygons, specifically regular pentagons, and the lower end surface of the lower inner pressure plate 11 is fixedly connected to a valve stem 14 located in the valve body 1. Specifically, the bottom surface of the lower inner pressure plate 11 is fixedly connected to a sleeve 13, and the upper end of the valve stem 14 is embedded in the sleeve 13. The cross-sections of the upper inner pressure plate 7 and the lower inner pressure plate 11 are both non-circular, specifically regular pentagons.

[0028] When the utility model actually needs to adjust the pressure, the upper connecting seat 5 only needs to be displaced in the height direction to change the distance between the upper force-generating point and the lower force-bearing point of the elastic member 6, thereby adjusting the elastic force it provides.

[0029] Under normal circumstances, the upper pressure plate and the lower pressure plate will clamp and bite the diaphragm 10 against each other. Since the two are respectively formed by the upper inner pressure plate 7, the upper outer pressure plate 9, the lower inner pressure plate 11 and the lower outer pressure plate 12, and the cross-sections of them are all regular pentagons, their rotation will not be as smooth as a circle, but there will be obvious obstacles to a certain extent. The strip-shaped anti-slip grooves 16 and 17 are used to amplify this effect. Since the two are arranged vertically and will not rotate synchronously, the friction force direction can always be kept inconsistent.

[0030] The two are engaged with each other through magnetic force, so that the engagement of the upper pressure plate and the lower pressure plate with the diaphragm 10 can be less than the state of being bitten by the bolts and nuts. The force provided to the diaphragm 10 can be within the bearing range of the diaphragm 10, making the diaphragm 10 less prone to aging. Moreover, at this time, there is no need to punch holes on the diaphragm 10 to pass the structure of the bolts and nuts, so the diaphragm 10 can also maintain a relatively good integrity and is less likely to leak.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A flow regulating and pressure regulating valve, characterized in that: The invention comprises a valve body (1), a valve connecting pipe (4) detachably connected thereto, a diaphragm (10) fixedly connected therebetween, and an upper inner pressure plate (7) and a lower inner pressure plate (11) clamped on both sides of the diaphragm (10), wherein the lower end surface of the lower inner pressure plate (11) is fixedly connected to a valve stem (14) located in the valve body (1), and the cross-sections of the upper inner pressure plate (7) and the lower inner pressure plate (11) are both non-circular.

2. A flow regulating and pressure regulating valve according to claim 1, characterized in that: The cross-sections of the upper inner pressure plate (7) and the lower inner pressure plate (11) are both regular polygons.

3. A flow regulating and pressure regulating valve according to claim 2, characterized in that: The upper inner pressure plate (7) and the lower inner pressure plate (11) are both provided with anti-skid grooves (16) on one side facing the diaphragm (10), and the anti-skid grooves (16) on the upper inner pressure plate (7) and the lower inner pressure plate (11) are arranged in a staggered manner.

4. A flow regulating and pressure regulating valve according to claim 3, characterized in that: The outer ring of the upper inner pressure plate (7) and the outer ring of the lower inner pressure plate (11) are both provided with an upper outer pressure plate (9) and a lower outer pressure plate (12) for clamping the diaphragm (10), and a spacing groove (15) is provided between the upper inner pressure plate (7) and the upper outer pressure plate (9), and between the lower inner pressure plate (11) and the lower outer pressure plate (12).

5. A flow regulating and pressure regulating valve according to claim 4, characterized in that: The upper outer pressure plate (9) and the lower outer pressure plate (12) are both provided with a second anti-slip pattern (17) on one side facing the diaphragm (10); the second anti-slip pattern (17) on the upper outer pressure plate (9) and the lower outer pressure plate (12) are arranged in a staggered manner, and the first anti-slip pattern (16) and the second anti-slip pattern (17) are arranged vertically.

6. A flow regulating and pressure regulating valve according to claim 3, characterized in that: The upper inner pressure plate (7) and the upper outer pressure plate (9) are both made of magnets, and the lower inner pressure plate (11) and the lower outer pressure plate (12) are both made of metal materials.

7. The flow regulating and pressure regulating valve according to claim 1, characterized in that: It also includes an upper connecting seat (5) vertically limited in the valve connecting pipe (4), an elastic member (6), and an inner cylinder (8) fixedly connected to the top surface of the upper inner pressure plate (7), wherein the elastic member (6) is sleeved on the outer sides of the upper connecting seat (5) and the inner cylinder (8) and is located between the upper inner pressure plate (7) and the upper connecting seat (5).

8. The flow regulating and pressure regulating valve according to claim 7, characterized in that: The bottom surface of the lower inner pressure plate (11) is fixedly connected with a sleeve (13), and the upper end of the valve stem (14) is embedded in the sleeve (13).

9. The flow regulating and pressure regulating valve according to claim 1, characterized in that: The valve body (1) is also fixedly connected to an inlet pipe (2) communicating therewith.

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