Stable diaphragm type pressure reducing valve

Abstract

The utility model discloses a stable diaphragm type pressure reducing valve which comprises a pressure reducing valve body and a pressure control channel connected to the outer side wall of the pressure reducing valve body, and the pressure control channel comprises an upper guide pipe, a lower guide pipe and an air inlet pipe. The opposite ends of the upper guide pipe, the lower guide pipe and the air inlet pipe are jointly connected with a three-way valve used for controlling the pressure of a conveying medium, the higher the flow is, the higher the pressure is, a fixing base is installed at one end of the air inlet pipe, a damping fin is arranged in the fixing base, and the through-flow area of liquid flow is locally changed through holes in the damping fin. In the pressure reducing valve, the pressure loss is favorable for realizing the adjustment and the stability of the overall pressure; the button in the elastic assembly is pushed to extrude the limiting spring to contract slowly, the connecting rod is pushed to drive the cleaning head to move towards the side where the damping fin is located, the cleaning head is controlled to penetrate through the interior of the damping fin back and forth for cleaning till the pressure in the pressure control channel is stable, and the running stability of equipment is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure reducing valve technical field, specifically is a stability diaphragm pressure reducing valve. BACKGROUND

[0002] The pressure reducing valve is a kind of key fluid control equipment widely used in many fields such as industrial production, civil facilities and municipal engineering, and its main function is to reduce high-pressure fluid (gas or liquid) to the required stable low pressure, to meet the working pressure requirements of different equipment and process, ensure that system is safe, stable, efficient operation, therefore is widely used in industrial field, electric power industry and metallurgical industry, simultaneously in civil field, pressure reducing valve is widely used in city gas supply system, simultaneously, in the water supply system of high-rise building, pressure reducing valve can reduce the high-pressure water of municipal pipe network to the appropriate floor pressure, avoid the problems such as pipe rupture, water equipment damage caused by high-rise water pressure.

[0003] The diaphragm pressure reducing valve in prior art is unstable in actual operation process due to many factors, for example, in the operation process of diaphragm pressure reducing valve, damping piece is usually arranged in the inside of one end connected with valve rod at pressure control pipe, its shape is circular and damping hole is arranged in the inside, for filtering impurities, and in the operation process, once the hole is blocked, the diaphragm leading to the inside of bottom diaphragm chamber generates overpressure or fluctuation, and the main valve diaphragm is broken in serious case, which affects equipment operation.

[0004] Therefore, a stability diaphragm pressure reducing valve is provided. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a stability diaphragm pressure reducing valve to solve the problems in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme: a stability diaphragm pressure reducing valve, including pressure reducing valve main body and the pressure control channel connected in its outer side wall, the pressure control channel includes upper guide pipe and lower guide pipe and intake pipe, and the opposite end of upper guide pipe and lower guide pipe and intake pipe is connected with three-way valve for controlling the pressure of conveying medium, one end of intake pipe is installed with fixed seat, the inside of fixed seat is equipped with damping piece, three-way valve includes the hollow chamber extending from three-way valve side, the inside of hollow chamber is installed with sealing platform and is isolated with the inside of three-way valve, the inside of sealing platform is movably installed with cleaning head, and the outer side wall of cleaning head close to sealing platform is connected with elastic component, and moving elastic component controls the cleaning head to enter and exit in the inside of damping piece and cleans.

[0007] Preferably, the main body of the pressure reducing valve is composed of a pilot valve seat and a main valve seat. The top and bottom of the pilot valve seat and the main valve seat are respectively provided with a pilot valve diaphragm and a main valve diaphragm. The bottom of the main valve diaphragm is provided with a diaphragm chamber. The bottom end of the lower conduit is connected to the interior of the diaphragm chamber. The upper end of the upper conduit is connected to the interior of the pilot valve seat. The lower end of the upper conduit is threadedly installed on the upper port of the three-way valve. The upper end of the lower conduit is threadedly installed on the lower port of the three-way valve.

[0008] Preferably, the interior of the fixed seat is threadedly connected to the left end of the three-way valve, the left side of the damping plate is provided with a matching sealing seat and fixedly connected to the fixed seat, and the other end of the air intake pipe is connected to the interior of the pressure reducing valve body.

[0009] Preferably, the elastic component includes a limiting spring fixed to the outer wall of the sealing platform, a button is installed at the other end of the limiting spring, a connecting rod is installed on one side of the button, and one end of the connecting rod is fixed to one end of the cleaning head.

[0010] Preferably, the sealing platform has a matching sealing sheet inside, the outer wall of the sealing sheet is connected to a sealing head, the opposite ends of the cleaning head and the connecting rod are fixed to the sealing head, the rod wall of the connecting rod is fitted with a sealing ring, and the sealing ring is fixedly installed on the sealing platform.

[0011] Preferably, the button is slidably installed inside the hollow chamber, and the sealing head is tapered on the side near the inside of the three-way valve to facilitate the passage of the conveying medium.

[0012] Preferably, the outer wall of the pressure reducing valve body is provided with a pressure sensing tube, and the upper end and lower end of the pressure sensing tube are respectively connected to the interior of the pilot valve seat and the main valve seat.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In actual operation, once overpressure or fluctuation is detected on the diaphragm at the bottom of the main valve, the button in the elastic component is pushed to compress the limiting spring and slowly contract it. This pushes the connecting rod to move the cleaning head to the side where the damping plate is located. The cleaning head is controlled to move back and forth through the damping plate to clean until the pressure inside the pressure control channel stabilizes, and the overpressure or fluctuation on the diaphragm disappears, thus improving the stability of the equipment operation.

[0015] 2. To further improve the sealing performance between the three-way valve and the hollow chamber, when the equipment is running, the pressure generated inside the pressure control channel and the three-way valve is higher than that outside. This internal pressure pushes the sealing sheet and sealing head to fit more tightly against the inside of the sealing seat, improving the sealing performance. Combined with the force of the limit spring inside the elastic component, it pulls the sealing sheet and sealing head outward, further improving the sealing effect and ensuring the normal operation of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the pressure control channel structure of this utility model;

[0018] Figure 3 This is a schematic cross-sectional view of the three-way valve of this utility model;

[0019] Figure 4 This is a partial cross-sectional structural diagram of the present invention.

[0020] In the diagram: 1. Pressure reducing valve body; 2. Pilot valve seat; 3. Main valve seat; 4. Pilot valve diaphragm; 5. Main valve diaphragm; 6. Pressure sensing tube; 7. Pressure control channel; 71. Upper guide tube; 72. Lower guide tube; 73. Inlet pipe; 74. Fixed seat; 75. Sealing seat; 76. Damping plate; 8. Three-way valve; 81. Hollow chamber; 82. Sealing platform; 83. Sealing sheet; 84. Sealing head; 86. Sealing ring; 87. Connecting rod; 88. Limit spring; 89. Button. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1:

[0023] Please see Figures 1-4This utility model provides a technical solution: a stable diaphragm pressure reducing valve, including a pressure reducing valve body 1 and a pressure control channel 7 connected to its outer wall. The pressure control channel 7 consists of an upper conduit 71, a lower conduit 72, and an air inlet pipe 73. The upper conduit 71, the lower conduit 72, and the air inlet pipe 73 are connected at opposite ends to a three-way valve 8 for controlling the pressure of the conveying medium. This valve controls the flow rate of the conveying medium within the tank; the more medium, the higher the pressure. A fixed seat 74 is installed at one end of the air inlet pipe 73. A damping plate 76 is provided inside the fixed seat 74. Through the holes in the damping plate 76, the flow area of ​​the liquid is locally changed, causing a pressure loss in the liquid flow. In the pressure reducing valve, this pressure loss helps to achieve the desired overall pressure. For regulation and stabilization, the three-way valve 8 includes a hollow chamber 81 extending from one side of the three-way valve 8. A sealing platform 82 is installed inside the hollow chamber 81 and is isolated from the interior of the three-way valve 8. A cleaning head is movably installed inside the sealing platform 82. An elastic component is connected to the outer wall of the cleaning head near the sealing platform 82. Moving the elastic component controls the cleaning head to pass in and out of the damping plate 76 for cleaning. By pushing the button 89 inside the elastic component, the limiting spring 88 is squeezed and slowly contracted, pushing the connecting rod 87 to move the cleaning head to the side where the damping plate 76 is located. The cleaning head is controlled to move back and forth through the damping plate 76 for cleaning until the pressure inside the pressure control channel 7 is stabilized, the diaphragm overpressure or fluctuations disappear, and the stability of equipment operation is improved.

[0024] In this embodiment, the pressure reducing valve body 1 is composed of a pilot valve seat 2 and a main valve seat 3. The top and bottom of the pilot valve seat 2 and the main valve seat 3 are respectively provided with a pilot valve diaphragm 4 and a main valve diaphragm 5. The bottom of the main valve diaphragm 5 is provided with a diaphragm chamber. The bottom end of the lower conduit 72 is connected to the interior of the diaphragm chamber. The upper end of the upper conduit 71 is connected to the interior of the pilot valve seat 2. The lower end of the upper conduit 71 is threadedly installed on the upper port of the three-way valve 8. The upper end of the lower conduit 72 is threadedly installed on the lower port of the three-way valve 8. They are connected and fixed to the three-way valve 8 by threaded connection. The interior of the fixing seat 74 is threadedly connected to the left end of the three-way valve 8, which facilitates disassembly and cleaning during actual maintenance. The left side of the damping plate 76 is provided with a matching sealing seat 75 and is fixedly connected to the fixing seat 74. The other end of the air inlet pipe 73 is connected to the interior of the pressure reducing valve body 1.

[0025] In this embodiment, the elastic component includes a limiting spring 88 fixed on the outer wall of the sealing platform 82. A button 89 is installed on the other end of the limiting spring 88. A connecting rod 87 is installed on one side of the button 89. One end of the connecting rod 87 is fixed to one end of the cleaning head. In conjunction with the force of the limiting spring 88 in the elastic component, an outward force is applied to the sealing sheet 83 and the sealing head 84, which further improves the sealing effect and ensures the normal operation of the equipment.

[0026] The sealing platform 82 has a matching sealing sheet 83 inside. The outer wall of the sealing sheet 83 is connected to a sealing head 84. The opposite ends of the cleaning head and the connecting rod 87 are fixed on the sealing head 84. The rod wall of the connecting rod 87 is fitted with a sealing ring 86. The sealing ring 86 is fixedly installed on the sealing platform 82. When the equipment is running, the pressure generated inside the pressure control channel 7 and the three-way valve 8 is higher than that outside. This internal pressure pushes the sealing sheet 83 and the sealing head 84 to fit more tightly with the inside of the sealing seat 82, improving the sealing performance.

[0027] In this embodiment, button 89 is slidably installed inside hollow chamber 81, and sealing head 84 is tapered on the side near the inside of three-way valve 8. During the transportation of the medium in the pipeline, the tapered sealing head 84 facilitates the passage of the medium.

[0028] In this embodiment, a pressure sensing tube 6 is provided on the outer wall of the pressure reducing valve body 1. The upper end and lower end of the pressure sensing tube 6 are respectively connected to the interior of the pilot valve seat 2 and the main valve seat 3, and are used to detect the pressure change in the tube in real time.

[0029] The working principle is as follows: When the damping plate 76 needs to be cleaned during actual operation, first confirm that the pressure sensing tube 6 is connected to the pilot valve seat 2 and the main valve seat 3 and can detect pressure changes normally. When the system is running, the medium enters through the air inlet pipe 73 and generates pressure loss through the holes of the damping plate 76 to achieve preliminary pressure regulation. The pressure sensing tube 6 monitors the pressure changes in the pilot valve seat 2 and the main valve seat 3 in real time. If the pressure in the diaphragm chamber at the bottom of the main valve diaphragm 5 fluctuates abnormally or is over-pressurized, push the button 89 of the elastic component to slide in the hollow chamber 81, squeeze the limit spring 88, and drive the cleaning head and sealing head 84 to move towards the damping plate 76 through the connecting rod 87. The cleaning head goes back and forth through the inside of the damping plate 76 to clean impurities until the pressure stabilizes.

[0030] At the same time, regularly check the performance of each component of the pressure reducing valve, such as whether the diaphragm is aging or whether the seal is leaking. If the damping plate 76 is found to be severely blocked or other components are damaged, the relevant valves can be closed, the connection between the pressure control channel 7 and the three-way valve 8 can be disassembled, the damping plate 76 can be cleaned or replaced, and after cleaning or repair, it can be reinstalled and tested to ensure that the equipment is operating normally and that the system is working stably for a long time.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stable diaphragm pressure reducing valve comprising a pressure reducing valve body (1) and a pressure control channel (7) connected to the outer side wall thereof, characterized in that: The pressure control channel (7) comprises an upper conduit (71), a lower conduit (72) and an air inlet pipe (73), the opposite ends of the upper conduit (71), the lower conduit (72) and the air inlet pipe (73) are connected with a three-way valve (8) for controlling the pressure of the conveying medium, one end of the air inlet pipe (73) is provided with a fixing seat (74), the inside of the fixing seat (74) is provided with a damping sheet (76), the three-way valve (8) comprises a hollow chamber (81) extending from one side of the three-way valve (8), the inside of the hollow chamber (81) is provided with a sealing table (82) and is isolated from the inside of the three-way valve (8), the inside of the sealing table (82) is movably provided with a cleaning head, the cleaning head is connected with an elastic assembly near the outer side wall of the sealing table (82), the elastic assembly controls the cleaning head to enter and exit the inside of the damping sheet (76) and clean.

2. A stability diaphragm pressure reducing valve according to claim 1, characterized in that: The pressure reducing valve body (1) is composed of a pilot valve seat (2) and a main valve seat (3), the top and bottom of the pilot valve seat (2) and the main valve seat (3) are respectively provided with a pilot valve diaphragm (4) and a main valve diaphragm (5), the bottom of the main valve diaphragm (5) is provided with a diaphragm chamber, the bottom end of the lower conduit (72) is connected with the inside of the diaphragm chamber, the upper end of the upper conduit (71) is connected with the inside of the pilot valve seat (2), the lower end of the upper conduit (71) is threadedly installed on the upper port of the three-way valve (8), and the upper end of the lower conduit (72) is threadedly installed on the lower port of the three-way valve (8).

3. A stability diaphragm pressure reducing valve according to claim 2, characterized in that: The inside of the fixing seat (74) is threadedly connected with the left end of the three-way valve (8), the left side of the damping sheet (76) is provided with a matched sealing seat (75) and is fixedly connected on the fixing seat (74), and the other end of the air inlet pipe (73) is connected with the inside of the pressure reducing valve body (1).

4. The stability diaphragm pressure reducing valve according to claim 1, characterized by: The elastic assembly comprises a limiting spring (88) fixed on the outer side wall of the sealing table (82), the other end of the limiting spring (88) is provided with a button (89), one side of the button (89) is provided with a connecting rod (87), and one end of the connecting rod (87) is fixed with one end of the cleaning head.

5. A stability diaphragm pressure reducing valve according to claim 4, characterized in that: The inside of the sealing table (82) is provided with a matched sealing sheet (83), the outer side wall of the sealing sheet (83) is connected with a sealing head (84), and the opposite ends of the cleaning head and the connecting rod (87) are fixed on the sealing head (84), the rod wall of the connecting rod (87) is sleeved with a sealing ring (86), and the sealing ring (86) is fixedly installed on the sealing table (82).

6. A stability diaphragm pressure reducing valve according to claim 5, characterized in that: The button (89) is slidingly installed in the inside of the hollow chamber (81), and the sealing head (84) is conically arranged near one side of the inside of the three-way valve (8), so that the conveying medium can pass through conveniently.

7. The stability diaphragm pressure reducing valve according to claim 1, wherein: The outer side wall of the pressure reducing valve body (1) is provided with a pressure sensing pipe (6), and the upper end and the lower end of the pressure sensing pipe (6) are connected with the inside of the pilot valve seat (2) and the main valve seat (3) respectively.

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