Valve body and multifunctional combination valve

Abstract

The utility model discloses a valve body and a multifunctional combination valve, the valve body comprises a valve body main body, the valve body main body is provided with a fluid channel and a control lower cavity formed by being matched with a valve diaphragm, the control lower cavity is provided with an external interface A capable of being communicated with the outside, and the external interface A is communicated with the valve diaphragm. A flow guide hole A communicated with the lower control cavity is formed in the valve body cavity A; the valve body cavity B is provided with a flow guide hole B which can be communicated with the lower control cavity; the lower end opening of the communicating hole protrudes downwards to form a lower sealing boss, and the upper end opening of the communicating hole protrudes upwards to form an upper sealing boss. The valve seat can be matched with the lower sealing boss or the upper sealing boss according to needs, meanwhile, the outer connector A, the flow guide hole A and the flow guide hole B can be opened and closed according to needs, different functions of the multifunctional combination valve are achieved, different valve bodies do not need to be produced according to different functions, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of valves, and more specifically, it relates to a valve body and a multi-functional composite valve. Background Art

[0002] The main valves, pilot valves and branch valves in existing water conservancy valve systems are mainly divided into two major categories of functions: pressure reducing type and pressure releasing type. The pressure releasing type valve is a functional valve used to prevent the system from overpressure, that is, when the system pressure exceeds the set value of the safety valve, it will automatically relieve pressure to protect the system; the pressure reducing valve is a valve that reduces a high pressure to a suitable pressure.

[0003] However, different types of valves require valve bodies with different structures. When enterprises produce different types of valves, they need to produce different valve bodies and related components for specific valve types, resulting in an increase in production costs. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a valve body and a multi-functional composite valve.

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

[0006] A valve body includes a valve body main body. The valve body main body is provided with a fluid passage and a control lower cavity formed in cooperation with a valve diaphragm. The fluid passage includes a valve body cavity A, a valve body cavity B, and a communication hole for communicating the valve body cavity A and the valve body cavity B. The valve body cavity A is provided with an inlet end, and the valve body cavity B is provided with an outlet end. The control lower cavity is provided with an external interface A that can communicate with the outside. The valve body cavity A is provided with a diversion hole A that communicates with the control lower cavity; the valve body cavity B is provided with a diversion hole B that can communicate with the control lower cavity; the lower port of the communication hole protrudes downward to form a lower sealing boss, and the upper port of the communication hole protrudes upward to form an upper sealing boss.

[0007] The utility model also provides a multi-functional composite valve adopting the above valve body, including a valve cover, a regulating valve rod, and a pressure spring. A valve diaphragm is arranged between the valve body and the valve cover. A control upper cavity is formed between the valve cover and the valve diaphragm. The valve diaphragm is fixedly provided with a valve seat for opening and closing the communication hole. The sealing block of the valve seat is provided with a cooperation with the lower sealing boss. A sealing spring is arranged on the lower end surface of the sealing block. And the diversion hole A and the external interface A are closed, while the diversion hole B is opened.

[0008] The utility model further sets: The valve body further includes a spring seat. The spring seat is detachably fixed on the mounting hole of the valve body main body, and the sealing spring is placed on the spring seat.

[0009] The utility model also provides a multi-functional composite valve adopting the above valve body, which includes a valve cover, an adjusting nut, an adjusting valve rod and a pressure spring. A valve diaphragm is arranged between the valve body and the valve cover, and a control upper cavity is formed between the valve cover and the valve diaphragm. The valve diaphragm is fixedly provided with a valve seat for opening and closing a communication hole. The feature is that: a sealing block of the valve seat is provided to cooperate with a lower sealing boss of the valve body, a sealing spring is arranged on the lower end surface of the sealing block, and the diversion hole A and the external interface A are closed, while the diversion hole B is opened; an orifice flowmeter is arranged at the outlet end, and the orifice flowmeter is connected to the external interface B of the valve cover.

[0010] The utility model also provides a multi-functional composite valve adopting the above valve body, which includes a valve cover, an adjusting valve rod and a pressure spring. A valve diaphragm is arranged between the valve body and the valve cover, and a control upper cavity is formed between the valve cover and the valve diaphragm. The valve diaphragm is fixedly provided with a valve seat for opening and closing a communication hole. The sealing block of the valve seat cooperates with an upper sealing boss, and the diversion hole B is closed, while the diversion hole A or the external interface A is opened.

[0011] The utility model also provides a multi-functional composite valve adopting the above valve body, which includes a valve cover, an adjusting valve rod, an adjusting nut and a pressure spring. A valve diaphragm is arranged between the valve body and the valve cover, and a control upper cavity is formed between the valve cover and the valve diaphragm. The valve diaphragm is fixedly provided with a valve seat for opening and closing a communication hole. The sealing block of the valve seat cooperates with an upper sealing boss, and the diversion hole B is closed, while the diversion hole A or the external interface A is opened; the control lower cavity is connected to a water supply end through the diversion hole A or the external interface A, and the control upper cavity is connected to a return water end through the external interface B.

[0012] Advantages of the utility model: The utility model is provided with a lower sealing boss and an upper sealing boss at the communication hole, so that the valve seat can cooperate with the lower sealing boss or the upper sealing boss according to needs. At the same time, it can also choose to open and close the external interface A, the diversion hole A and the diversion hole B according to needs to adapt to the requirements of different types of valves for the valve body structure, so as to realize the different functions of different types of valves, without the need to produce different valve bodies for different types of valves, reducing the manufacturing cost.

[0013] When the sealing block of the valve seat cooperates with the lower sealing boss, when the external interface A and the diversion hole A are in the closed state and the diversion hole B is in the open state, at this time, the lower cavity is controlled to communicate with the valve body cavity B through the diversion hole B. The pressure of the lower cavity is controlled to increase as the pressure of the valve body cavity B increases, so that the valve seat will move upward and close the communication hole, realizing the pressure reduction function and can be used as a pressure reducing valve. On this basis, the regulating valve stem is fixed on the valve cover through an adjusting nut, and an orifice flowmeter is arranged at the outlet end of the valve body cavity B. The orifice flowmeter is connected to the external interface B of the valve cover, so that the flow rate is controlled at the set value and can be used as a flow control valve.

[0014] When the sealing block of the valve seat cooperates with the upper sealing boss, the external interface A or the diversion hole A is in the open state and the diversion hole B is in the closed state. At this time, the lower cavity is controlled to communicate with the inlet end of the valve body cavity A through the diversion hole A or the external interface A. The pressure of the lower cavity is controlled to increase as the pressure at the inlet end of the valve body cavity A increases, so that the valve seat will move upward to open the communication hole, realizing the pressure relief function and can be used as a pressure relief valve. On this basis, the regulating valve stem is fixed on the valve cover through an adjusting nut, and the lower cavity is connected to the water supply end through the diversion hole A or the external interface A, and the upper cavity is connected to the return water end through the external interface B, thereby controlling the pressure difference between the water supply end and the return water end and realizing the function of differential pressure control and can be used as a differential pressure control valve. Description of the Drawings

[0015] Figure 1 Structural schematic diagram of a valve body of the present utility model Figure 1 ;

[0016] Figure 2 Structural schematic diagram of a valve body of the present utility model Figure 2 ;

[0017] Figure 3 Cross-sectional view of a valve body of the present utility model;

[0018] Figure 4 Structural schematic diagram of the multifunctional composite valve of the present utility model as a pressure reducing valve;

[0019] Figure 5 Structural schematic diagram of the multifunctional composite valve of the present utility model as a flow control valve;

[0020] Figure 6 Structural schematic diagram of the multifunctional composite valve of the present utility model as a pressure relief valve;

[0021] Figure 7 Structural schematic diagram of the multifunctional composite valve of the present utility model as a differential pressure control valve.

[0022] Description of reference numerals: 1. Valve body; 11. Valve body main body; 12. Fluid passage; 121. Valve body cavity A; 122. Valve body cavity B; 123. Communication hole; 14. External interface A; 15. Diversion hole A; 16. Diversion hole B; 17. Lower sealing boss; 18. Upper sealing boss; 19. Spring seat; 2. Valve diaphragm; 3. Valve seat; 4. Valve cover; 41. External interface B; 5. Regulating valve rod; 6. Pressure spring; 7. Sealing spring; 8. Orifice flowmeter; 9. Adjusting nut; 10. Control lower cavity; 20. Control upper cavity. Detailed description of the specific implementation

[0023] Refer to the attached Figures 1 to 7 A further detailed description is made for an embodiment of a valve body and a multi-functional composite valve of the utility model.

[0024] Embodiment 1: As Figures 1 to 3 It can be seen that a valve body 1 includes a valve body main body 11. The valve body main body 11 is provided with a fluid passage 12 and a control lower cavity 10 formed in cooperation with the valve diaphragm 2. The valve diaphragm 2 and the valve cover cooperate to form a control upper cavity 20. The fluid passage 12 includes a valve body cavity A121, a valve body cavity B122, and a communication hole 123 for communicating the valve body cavity A121 and the valve body cavity B122. The valve body cavity A121 is provided with an inlet end, and the valve body cavity B122 is provided with an outlet end.

[0025] The control lower cavity 10 is provided with an external interface A14 that can communicate with the outside. The external interface A14 is arranged on one side of the valve body 1. The valve body cavity A121 is provided with a diversion hole A15 communicating with the control lower cavity 10; the valve body cavity B122 is provided with a diversion hole B16 that can communicate with the control lower cavity 10; among them, the external interface A14, the diversion hole A15, and the diversion hole B16 can all be closed by a plug.

[0026] The lower port of the communication hole 123 protrudes downward to form a lower sealing boss 17, and the upper port of the communication hole 123 protrudes upward to form an upper sealing boss 18. In the utility model, the lower sealing boss 17 and the upper sealing boss 18 are provided in the communication hole 123, so that the valve seat 3 can cooperate with the lower sealing boss 17 or the upper sealing boss 18 as required. At the same time, it can also be selected to open and close the external interface A14, the diversion hole A15, and the diversion hole B16 as required to adapt to the structural requirements of different types of valves for the valve body 1 and realize the different functions of different types of valves, without the need to produce different valve bodies 1 for different types of valves, reducing the manufacturing cost.

[0027] Embodiment 2: Apply the above valve body 1 to a pressure reducing valve, such as Figure 4As shown, the multi-functional composite valve includes a valve cover 4, a regulating valve rod 5 and a pressure spring 6. A valve diaphragm 2 is arranged between the valve body 1 and the valve cover 4. A control upper cavity 20 is formed between the valve cover 4 and the valve diaphragm 2. The valve diaphragm 2 is fixedly provided with a valve seat 3 for opening and closing a communication hole 123. The sealing block of the valve seat 3 is provided with a cooperation with a lower sealing boss 17. A sealing spring 7 is arranged on the lower end surface of the sealing block. The valve body 1 further includes a spring seat 19. The spring seat 19 is detachably fixed on the mounting hole of the valve body main body 11. The sealing spring 7 is placed on the spring seat 19.

[0028] When the external interface A14 and the diversion hole A15 are in a closed state and the diversion hole B16 is in an open state, at this time, the control lower cavity 10 is communicated with the valve body cavity B122 through the diversion hole B16. When the pressure spring 6 is at a certain pressure setting value, it pushes the valve diaphragm 2 and drives the valve seat 3 to move downward. At this time, the medium flows from the valve body cavity A121 to the valve body cavity B122. At the same time, the medium enters the control lower cavity 10 through the diversion hole B16 and forms a pressure difference with the pressure spring 6 in the control upper cavity 20. If the pressure of the valve body cavity B122 increases, that is, the pressure of the control lower cavity 10 also increases, that is, the pressure of the control lower cavity 10 increases as the pressure of the valve body cavity B122 increases, thereby overcoming the elastic force of the pressure spring 6 in the control upper cavity 20 to drive the valve diaphragm 2 and the valve seat 3 to move upward and close or close the communication hole 123 of the valve seat 3, realizing the pressure reducing function and can be used as a pressure reducing valve.

[0029] Embodiment 3: On the basis of Embodiment 2, as Figure 5 shown, the regulating valve rod 5 is fixed on the valve cover 4 through an adjusting nut 9, and an orifice flowmeter 8 can be arranged at the outlet end of the valve body cavity B122. The orifice flowmeter 8 is connected to the external interface B41 of the valve cover 4. The specific structure of the orifice flowmeter 8 is an existing design and will not be described in detail. When the flow rate through the orifice flowmeter 8 decreases, the pressure difference on both sides of the orifice flowmeter 8 also decreases. The pressure medium reaches the control upper cavity 20 through the external interface B41. At this time, the pressure spring 6 drives the valve diaphragm 2, thereby driving the valve seat 3 to continue to move downward, further opening the communication hole 123 of the valve body 1 to increase the flow rate to reach the set value; when the flow rate through the orifice flowmeter 8 increases, the pressure difference on both sides of the orifice flowmeter 8 also increases. Similarly, the pressure medium reaches the control upper cavity 20 through the external interface B41. At this time, the control lower cavity 10 becomes higher to make the pressure spring 6 drive the valve diaphragm 2, thereby driving the valve seat 3 to continue to move upward, gradually closing the communication hole 123, that is, the flow rate becomes smaller to reach the set value and can be used as a flow control valve

[0030] Embodiment 4: The above valve body 1 is used on a pressure reducing valve, as Figure 6As shown in the figure, the multi-functional composite valve includes a valve cover 4, a regulating valve stem 5, and a pressure spring 6. A control upper cavity 20 is formed between the valve cover 4 and the valve diaphragm 2. A valve seat 3 for opening and closing a communication hole 123 is fixedly arranged on the valve diaphragm 2, and a sealing block of the valve seat 3 is matched with an upper sealing boss 18.

[0031] When the external interface A14 or the diversion hole A15 is in an open state and the diversion hole B16 is in a closed state, at this time, the control lower cavity 10 is connected to the inlet end of the valve body cavity A121 through the diversion hole A15 or the external interface A14. The medium passes through the valve body cavity A121 and then through the diversion hole A15, or the medium enters the control lower cavity 10 through the interface A to form a pressure difference with the pressure spring 6. When the pressure of the medium at the inlet end becomes higher, the pressure at the valve body cavity A or the interface A and the lower chamber also becomes higher, that is, the pressure of the control lower cavity 10 increases as the pressure at the inlet end of the valve body cavity A121 increases. At this time, the pressure of the control lower cavity 10 pushes the valve diaphragm 2 and the valve seat 3 to move upward and gradually opens the communication hole 123 of the valve body 1, realizing the pressure relief function and can be used as a pressure relief valve. The connection between the diversion hole A15 or the interface A and the control lower cavity 10 can be selected according to customer and product requirements.

[0032] Example 5: On the basis of Example 4, as Figure 7 shown in the figure, the regulating valve stem 5 is fixed on the valve cover 4 through an adjusting nut 9, and the control lower cavity 10 is connected to the water supply end through the diversion hole A15 or the external interface A14, and the control upper cavity 20 is connected to the return water end through the external interface B41.

[0033] When the pressure difference between the water supply end and the return water end increases, that is, the pressure of the water supply end increases, the pressure of the control lower cavity 10 is greater than the pressure of the control upper cavity 20. The valve diaphragm 2 drives the valve seat 3 to move upward, that is, the opening degree of the communication hole 123 becomes larger, that is, the drainage increases, so that the pressure difference between the water supply end and the return water end decreases and is maintained at a set value; when the pressure difference between the water supply end and the return water end decreases, that is, the pressure of the water supply end decreases, the pressure of the control lower cavity 10 is less than the pressure of the control upper cavity 20. The valve diaphragm 2 drives the valve stem on the valve seat 3 to move upward, that is, the opening degree of the communication hole 123 becomes smaller, that is, the drainage decreases, so that the pressure difference between the water supply end and the return water end increases, the pressure of the water supply end increases and returns to the set value again, thereby controlling the pressure difference between the water supply end and the return water end and realizing the function of pressure difference control. It can be used as a pressure difference control valve; similarly, the connection between the diversion hole A15 or the interface A and the control lower cavity 10 can be selected according to customer and product requirements.

[0034] The above are only the preferred embodiments of the utility model. The protection scope of the utility model is not limited to the above embodiments. Any technical solutions falling within the concept of the utility model belong to the protection scope of the utility model. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the utility model should also be regarded as within the protection scope of the utility model.

Claims

1. A valve body, comprising a valve body main body, the valve body main body is provided with a fluid passage and a control lower cavity formed in cooperation with a valve diaphragm, the fluid passage comprises a valve body cavity A and a valve body cavity B and a connecting hole for connecting the valve body cavity A and the valve body cavity B, wherein the valve body cavity A is provided with an inlet end, and the valve body cavity B is provided with an outlet end, wherein: The control cavity is provided with an external interface A which can be connected to the outside world, the valve body cavity A is provided with a flow guide hole A which is connected to the control cavity; the valve body cavity B is provided with a flow guide hole B which can be connected to the control cavity; The lower end of the communicating hole protrudes downward to form a lower sealing boss, and the upper end of the communicating hole protrudes upward to form an upper sealing boss.

2. A multifunctional composite valve using the valve body of claim 1, comprising a valve cover, a regulating valve stem and a pressure spring, a valve diaphragm is arranged between the valve body and the valve cover, a control upper cavity is formed between the valve cover and the valve diaphragm, and a valve seat for opening and closing a connecting hole is fixedly arranged on the valve diaphragm, wherein: The sealing block of the valve seat is provided with a lower sealing boss matched with the valve body, the lower end surface of the sealing block is provided with a sealing spring, and the guide hole A and the external interface A are closed, while the guide hole B is opened.

3. The multifunctional composite valve according to claim 2, characterized in that: The valve body also includes a spring seat, which is detachably fixed on the mounting hole of the valve body, and the sealing spring is placed on the spring seat.

4. A multifunctional composite valve using the valve body of claim 1, comprising a valve cover, an adjusting nut, an adjusting valve stem and a pressure spring, a valve diaphragm is arranged between the valve body and the valve cover, a control upper cavity is formed between the valve cover and the valve diaphragm, and a valve seat for opening and closing a connecting hole is fixedly arranged on the valve diaphragm, wherein: The sealing block of the valve seat is provided with a lower sealing boss that cooperates with the valve body, the lower end face of the sealing block is provided with a sealing spring, and the guide hole A and the external interface A are closed, while the guide hole B is opened; an orifice flowmeter is provided at the outlet end, and the orifice flowmeter is connected to the external interface B of the valve cover.

5. A multifunctional composite valve using the valve body of claim 1, comprising a valve cover, a regulating valve stem and a pressure spring, a valve diaphragm is arranged between the valve body and the valve cover, a control upper cavity is formed between the valve cover and the valve diaphragm, and a valve seat for opening and closing a connecting hole is fixedly arranged on the valve diaphragm, wherein: The sealing block of the valve seat cooperates with the upper sealing boss of the valve body, and the flow guide hole B is closed, while the flow guide hole A or the external interface A is opened.

6. A multifunctional composite valve using the valve body of claim 1, comprising a valve cover, an adjusting nut, an adjusting valve stem and a pressure spring, a valve diaphragm is arranged between the valve body and the valve cover, a control upper cavity is formed between the valve cover and the valve diaphragm, and a valve seat for opening and closing a connecting hole is fixedly arranged on the valve diaphragm, wherein: The sealing block of the valve seat cooperates with the upper sealing boss of the valve body, and the guide hole B is closed, while the guide hole A or the external interface A is opened; the control lower cavity is connected to the water supply end through the guide hole A or the external interface A, and the control upper cavity is connected to the return water end through the external interface B.

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