Pressure reducing valve capable of being remotely controlled

Abstract

The utility model discloses a pressure reducing valve capable of being remotely controlled, which relates to the technical field of valves and comprises a main valve and a remote control part, a pilot valve is arranged between the main valve and the remote control part, the remote control part comprises an adjustable throttle valve and an electromagnetic valve, and the electromagnetic valve is connected with the main valve through the pilot valve, a plurality of pipelines and the adjustable throttle valve. The pressure reducing valve with the pilot valve, the adjustable throttling valve and the electromagnetic valve is arranged, the pilot valve, the adjustable throttling valve and the electromagnetic valve are connected through the multiple pipelines and finally connected with the main valve, opening and closing of a valve port of the main valve are remotely controlled, and an operator only needs to control opening and closing of the electromagnetic valve, so that the multiple pressure reducing valves can be integrally controlled; according to the technical scheme, control convenience and standardization are improved, automation and remote centralized control in the industrial process can be achieved, meanwhile, the technical scheme is also suitable for other types of valves, and the practical adaptation range is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a remotely controlled pressure reducing valve. Background Art

[0002] A pressure reducing valve is a valve that reduces the inlet pressure to a certain required outlet pressure and automatically keeps the outlet pressure stable. With the increasing demand for pressure reducing valves in the market, various types of pressure reducing valves have emerged. The pilot-operated pressure reducing valve uses the opening of the opening and closing parts in the control valve body to reduce the pressure of the medium. At the same time, it uses the pressure after the valve to adjust the opening of the opening and closing parts to keep the pressure after the valve within a certain range. When the inlet pressure is constantly changing, the outlet pressure is kept within the set range. In order to further improve the control effect of the pressure reducing valve, it is urgent to improve the control structure and control method of the valve.

[0003] Chinese patent document CN104061353A "A pilot pressure reducing valve" is disclosed. A pilot pressure reducing valve is adopted, including a pressure regulating hand wheel, a spring and a valve cover. The spring includes a pressure regulating spring and a main valve spring. The pressure regulating hand wheel is equipped with an adjusting screw, which is installed on the valve cover. A pressure regulating spring is arranged in the valve cover. The pressure regulating spring is connected to one end of the pilot valve. A pilot valve core is fixed to the other end of the pilot valve. The pilot valve core is fixed to the pilot valve seat. A remote control port is arranged at the tail end of the pilot valve seat. An oil drain port is arranged at the lower end of the pilot valve seat. A valve body is fixed to the lower end of the valve cover. A main valve spring is arranged in the valve body. An oil inlet port is arranged at the lower end of the main valve spring. A main valve core is arranged on the oil inlet. A pressure reducing port is arranged on the main valve core. An oil outlet port is arranged on one side of the pressure reducing port. A damping hole is arranged on one side of the lower end of the main valve core. An end cover is arranged at the bottom of the main valve core. However, the valve body structure in the patent cannot remotely control the pressure reducing valve. Summary of the invention

[0004] The utility model mainly solves the technical problem that the original pressure reducing valve cannot be remotely controlled to open and close, and provides a remotely controlled pressure reducing valve. A main valve, a pilot valve, an adjustable flow valve and a solenoid valve are interconnected through a plurality of pipelines. A worker controls the opening and closing of the solenoid valve to realize the remote control opening and closing of the main valve body, thereby realizing industrial process automation and remote centralized control.

[0005] The above technical problems of the utility model are mainly solved by the following technical solutions: the utility model includes a main valve and a remote control part, a pilot valve is arranged between the main valve and the remote control part, the remote control part includes a solenoid valve, and the solenoid valve is connected to the main valve through the pilot valve, a plurality of pipelines and an adjustable flow valve.

[0006] Preferably, the main valve comprises a slide valve and a pressure sensing chamber.

[0007] Preferably, the pilot valve comprises a valve body, one side of the valve body is provided with an inlet N, and the other side is provided with a pressure feedback hole M, the inlet N is connected to the pressure sensing chamber 1 through a pipeline h, and the pressure feedback hole M is connected to the pressure sensing chamber 2 through a pipeline, a two-position three-way solenoid valve.

[0008] Preferably, valve ports V1 and V2 are provided below the main valve and the pilot valve.

[0009] Preferably, a pipeline g is provided at the inlet end of the adjustable flow valve, and a pipeline h is provided between the pipeline g and the pressure sensing chamber 1.

[0010] Preferably, the pilot valve is further provided with an interface L, a pipeline d is provided between the interface L and the solenoid valve, and a pipeline f is provided between the solenoid valve and the outlet of the adjustable flow valve.

[0011] Preferably, a valve core is further provided in the valve body of the pilot valve, a diaphragm is provided at the top of the valve core, a second pressure sensing chamber is provided at the lower side of the diaphragm, and the interface L is arranged on the side wall of the second pressure sensing chamber.

[0012] Preferably, the pressure reducing valve further comprises a stop valve, and the stop valve is connected to the pilot valve via a pipeline.

[0013] Preferably, the pressure reducing valve is further provided with a needle valve, and the needle valve is connected to the pressure sensing chamber 1 through a pipeline.

[0014] The beneficial effects of the utility model are as follows: a pressure reducing valve with a pilot valve, an adjustable flow valve and a solenoid valve is provided, the pilot valve, the adjustable flow valve and the solenoid valve are connected by a plurality of pipelines, and finally connected to a main valve to realize remote control of the opening and closing of the valve port of the main valve. An operator only needs to control the opening and closing of the solenoid valve to realize integrated control of a plurality of pressure reducing valves, thereby improving the convenience and standardization of control, realizing industrial process automation and remote centralized control, and changing the type of the solenoid valve can realize other requirements of the pressure reducing valve. In addition, the utility model is also applicable to other types of valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of an existing pressure reducing valve of the utility model.

[0016] Figure 2 It is a structural diagram of a remote-controlled pressure reducing valve of the utility model.

[0017] Figure 3 It is a structural diagram of another remote-controlled pressure reducing valve of the utility model.

[0018] Figure 4 It is a structural diagram of an improved pilot valve of the utility model.

[0019] In the figure, 1. main valve, 2. slide valve, 3. needle valve, 4. pressure sensing chamber 1, 5. original pilot valve, 6. adjustable flow valve, 7. improved pilot valve, 8. two-position three-way solenoid valve, 9. stop valve, 10. pressure sensing chamber 2, 11. valve core, 12. diaphragm, 13. three-position four-way solenoid valve. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0021] Embodiment 1: A remote-controlled pressure reducing valve in this embodiment is widely used in various projects for conveying fluids. However, most of the various pressure reducing valves currently used do not have a remote control function, which is not conducive to the automation of the operation process and remote centralized control. Figure 1 As shown in the figure, the type of pressure reducing valve widely used at present is 200X type. The structure of this type of pressure reducing valve is as follows: Figure 1 As shown, it includes a main valve 1, an original pilot valve 5, a needle valve 3, a stop valve 9 and several connecting pipes. The original pilot valve 5 of this type of pressure reducing valve is basically similar to the structure of an ordinary adjustable pressure reducing valve. When the water supply is stopped, the stop valve 9 needs to be manually closed. Therefore, the switching mode of the existing pressure reducing valve needs to be manually switched. In order to solve this problem and further improve the use efficiency and integrated use degree of the pressure reducing valve, a new pressure reducing valve structure is mentioned in this embodiment. The entire pressure reducing valve includes a main valve and a remote control part. The main valve includes a slide valve 2, which is arranged below the pressure sensing chamber 1 4, and a valve port V1 is arranged below the slide valve. The main valve is also provided with a pressure sensing chamber 1 4, and the pressure reducing valve is also provided with a stop valve 9 and an improved pilot valve 7. The stop valve 9 is connected to the improved pilot valve 7 through a pipeline. The improved pilot valve 7 includes a valve body, one side of the valve body is provided with an inlet N, the other side is provided with a pressure feedback hole M, and a sensing chamber interface L. The inlet N is connected to the pressure sensing chamber 1 4 through a pipeline h, and the pressure feedback hole M is connected to the two-position three-way solenoid valve 8 and the pressure sensing chamber 2 10 through a pipeline. A pipeline d is provided between the sensing chamber interface L and the electromagnetic valve, and a pipeline f is provided between the electromagnetic valve and the outlet of the adjustable flow valve 6. The valve core 11 is arranged in the pilot valve, a diaphragm 12 is provided at the top of the valve core, a pressure sensing chamber 10 is provided at the lower side of the diaphragm, the interface L is arranged on the side wall of the pressure sensing chamber 10, and a valve port V2 is provided at the bottom of the pilot valve. The remote control part includes a two-position three-way electromagnetic valve 8, which is connected to the main valve through a pilot valve 7, a plurality of pipelines and an adjustable flow valve. A pipeline g is provided at the inlet of the adjustable flow valve, and a pipeline h is provided between the pipeline g and the pressure sensing chamber 1 4. The pressure reducing valve is also provided with a needle valve 3, which is connected to the pressure sensing chamber 1 4 through a pipeline.

[0022] This implementation Figure 2As shown in FIG. 1 , the difference from the existing 200X type pressure reducing valve structure is that an improved pilot valve 7 is set in the pressure reducing valve, and an adjustable flow valve 6, a two-position three-way solenoid valve 8 and several connecting pipes are added. The structure of the improved pilot valve 7 is as shown in FIG. Figure 4 As shown, the difference from the original pilot valve 5 is that: an interface L is provided on the cavity wall of the pressure sensing chamber 10, and the pressure feedback hole M is connected to the pressure sensing chamber 10 through a two-position three-way solenoid valve 8; the interface A of the two-position three-way solenoid valve 8 is connected to the outlet of the main valve through a pipeline e, a pipeline b, a stop valve 9 and a pipeline; the interface B is connected to the outlet of the adjustable flow valve 6 through a pipeline f; the interface P is connected to the interface L of the improved pilot valve 7 through a pipeline d, and the pressure feedback hole M of the improved pilot valve 7 is connected to the outlet of the main valve through a pipeline C, a stop valve 9 and a pipeline a; the inlet of the adjustable flow valve is connected to the pressure sensing chamber 1 4 of the upper cavity of the main valve diaphragm through pipelines g and h, and the inlet N of the improved pilot valve 7 is connected to the pressure sensing chamber 1 4 of the main valve through a pipeline h.

[0023] In the case of normal water supply, the two-position three-way solenoid valve is de-energized. Figure 2 As shown, at this time, the outlet of the main valve is connected to the pressure feedback hole M of the original pilot valve 7 and the pressure sensing chamber 2 10 through the relevant pipeline. At this time, the working condition of the pressure reducing valve is exactly the same as that of the ordinary 200X type pressure reducing valve. When the inlet pressure or output flow fluctuates, the output pressure is basically maintained at the set value. When it is necessary to stop the water supply, the two-position three-way solenoid valve 8 is energized. At this time, the pressure feedback hole M of the pilot valve is disconnected from the pressure sensing chamber 2 10. The high-pressure water in the pressure sensing chamber 1 4 above the main valve enters the pressure sensing chamber 2 10 of the pilot valve through the pipeline h, pipeline g, adjustable flow valve 6, pipeline f and pipeline d, pushing the diaphragm 12 and driving the valve core 11 to move upward until the valve port V2 is closed. At this time, since the high-pressure water in the pressure sensing chamber 1 4 cannot be discharged, the pressure in the chamber increases, pushing the slide valve 2 to move downward until the valve port V1 is closed, and the water supply to the downstream is stopped. The adjustable flow valve 6 is used to control the fluid speed entering the pressure sensing chamber 2 10 from the pressure sensing chamber 1 4 to prevent the valve port V1 from closing too fast and causing water hammer.

[0024] Embodiment 2: Figure 3 The structure of the pressure reducing valve in this embodiment is the same as that of the embodiment 1 except for the three-position four-way solenoid valve 13. Figure 3The technical solution shown is suitable for when it is necessary to output high-pressure and high-flow medium. At this time, a three-position four-way solenoid valve 13 is set in the pressure reducing valve. When the power is off, the working condition of the pressure reducing valve is the same as that of the ordinary 200X type pressure reducing valve; when the electromagnet E1 is energized and E2 is de-energized, the valve port V2 of the pilot valve is closed, and the water supply to the downstream is stopped; when the electromagnet E2 is energized and E1 is de-energized, the high-pressure water in the pressure sensing chamber 14 above the main valve is connected to the outlet of the main valve through the pipeline h, pipeline g, adjustable flow valve 6, pipeline f, pipeline k and pipeline c, and the pressure of the pressure sensing chamber 14 drops rapidly. The slide valve 2 moves upward under the push of the inlet high-pressure water until the valve port V1 is fully opened, and the high-pressure and high-flow medium is output downstream.

[0025] Under normal water supply conditions, the solenoid valve 13 loses power at this time. If the output pressure increases significantly due to a fault such as a pilot valve, which may cause damage to downstream equipment or pipelines, the pressure sensor set on the downstream pipeline can be used to energize E1 of the solenoid valve 13 and de-energize E2 to close the valve port V1 and stop supplying water to the downstream. The remote-controlled pressure reducing valve mentioned in Examples 1 and 2 can solve the shortcomings of the manual opening and closing of the existing ordinary pressure reducing valves, realize industrial process automation and remote centralized control, and the design concept of this patent is also applicable to various other types of valves, so the scope of application of this patent is wide.

Claims

1. A remotely controlled pressure reducing valve, characterized in that: It includes a main valve and a remote control part, a pilot valve is arranged between the main valve and the remote control part, the remote control part includes an adjustable flow valve and a solenoid valve, and the solenoid valve is connected to the main valve through the pilot valve, several pipelines and the adjustable flow valve.

2. A remotely controlled pressure reducing valve according to claim 1, characterized in that: The main valve comprises a slide valve and a pressure sensing chamber.

3. A remotely controlled pressure reducing valve according to claim 2, characterized in that: The pilot valve includes a valve body, one side of the valve body is provided with an inlet N, and the other side is provided with a pressure feedback hole M, the inlet N is connected to the pressure sensing chamber 1 through a pipeline h, and the pressure feedback hole M is connected to the pressure sensing chamber 2 through a pipeline and a solenoid valve.

4. A remotely controlled pressure reducing valve according to claim 2, characterized in that: The slide valve in the main valve is arranged below the pressure sensing chamber 1, and a valve port V1 is arranged below the slide valve.

5. A remotely controlled pressure reducing valve according to claim 4, characterized in that: A pipeline g is provided at the inlet end of the adjustable flow valve, and a pipeline h is provided between the pipeline g and the pressure sensing chamber 1.

6. A remotely controlled pressure reducing valve according to any one of claims 4 or 5, characterized in that: The pilot valve is further provided with an interface L and an interface T. A pipeline d is provided between the interface L and the electromagnetic valve, and a pipeline f is provided between the electromagnetic valve and the adjustable flow valve.

7. A remotely controlled pressure reducing valve according to claim 6, characterized in that: A valve core is also provided in the valve body of the pilot valve, a diaphragm is provided on the top of the valve core, the upper cavity of the valve body is the second pressure sensing cavity, the interface T is arranged on the side wall of the second pressure sensing cavity, and a valve port V2 is provided at the bottom end of the pilot valve.

8. A remotely controlled pressure reducing valve according to claim 1, characterized in that: The pressure reducing valve further comprises a stop valve, and the stop valve is connected to the pilot valve through a pipeline.

9. A remotely controlled pressure reducing valve according to claim 2, characterized in that: The pressure reducing valve is also provided with a needle valve, and the needle valve is connected to the pressure sensing chamber 1 through a pipeline.

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