Diaphragm valve control structure

Abstract

The utility model discloses a diaphragm valve control structure, which relates to the technical field of valves and comprises a through pipe, a valve body is fixedly mounted at the top end of the through pipe through a mounting seat, a hole plate is arranged at the top end in the valve body, a diaphragm is arranged at the bottom end of the hole plate, and a valve rod is fixedly connected to the bottom end of the diaphragm through a cushion. A valve core is fixedly mounted at the bottom end of the valve rod; firstly, the buffer pad is additionally arranged at the bottom end of the diaphragm and is directly and fixedly connected with the valve rod, so that the more stable connection effect between the diaphragm and the opening and closing piece is achieved, the binding force between the diaphragm and the valve rod is enhanced, and connection disengagement caused by misoperation or long-term vibration is effectively prevented; and secondly, the spring is arranged to be connected to the outer surface of the valve rod in a sleeving mode and movably installed in the movable cavity, resilience force of the diaphragm in the closed state is provided, and the buffering effect can be achieved when the diaphragm is subjected to pressure change.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely relates to a diaphragm valve control structure. BACKGROUND

[0002] The structure form of diaphragm valve is quite different from general valves, is a new type of valve, is a special form of cut-off valve, and the opening and closing part thereof is a diaphragm made of soft material, which separates the inner cavity of the valve body from the inner cavity of the valve cover and the driving part, and is widely used in various fields.

[0003] The existing diaphragm valve often has the problem of connection falling off between the diaphragm and the opening and closing part during use, which causes the diaphragm valve to be unable to open or adjust the size of the flow. UTILITY MODEL CONTENTS

[0004] To solve the above technical problems, a diaphragm valve control structure is provided, which solves the problem of connection falling off between the diaphragm and the opening and closing part of the existing diaphragm valve during use, which causes the diaphragm valve to be unable to open or adjust the size of the flow.

[0005] To achieve the above purposes, the utility model adopts the technical scheme that:

[0006] A diaphragm valve control structure, comprising a through pipe, a valve body is fixedly installed at the top end of the through pipe through a mounting seat, a hole plate is arranged at the inner top end of the valve body, a diaphragm is arranged at the bottom end of the hole plate, a valve rod is fixedly connected to the bottom end of the diaphragm through a buffer pad, and a valve core is fixedly installed at the bottom end of the valve rod.

[0007] Preferably, a stopper is arranged in the through pipe.

[0008] Preferably, the bottom end of the mounting seat is fixedly installed at the top end of the through pipe through a sealing ring and a fixing screw.

[0009] Preferably, a sealing pad is arranged on the outer surface of the valve rod, and the sealing pad is arranged at the top end of the valve core.

[0010] Preferably, a spring is sleeved and installed on the outer surface of the valve rod, and the spring is movably installed in the inner part of the movable cavity.

[0011] Preferably, the outer surface of the valve body is communicated with a pneumatic cavity through an air pipe.

[0012] Preferably, a fixed plate is arranged on the outer surface of the valve body, and a pressure gauge is arranged at the top end of the fixed plate.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] Firstly, by additionally arranging the buffer pad at the bottom end of the diaphragm and directly fixing the buffer pad with the valve rod, the connection between the diaphragm and the opening and closing element is more stable, the bonding force between the diaphragm and the valve rod is enhanced, the connection falling off caused by improper operation or long-term vibration is effectively prevented, so that the diaphragm valve can be smoothly opened and the flow size can be accurately adjusted, secondly, the spring sleeve is arranged on the outer surface of the valve rod and movably installed in the movable cavity, which not only provides the rebound force of the diaphragm in the closed state, but also plays a buffering role when the diaphragm is subjected to pressure change, reduces the risk of damage of the diaphragm due to instantaneous pressure impact, realizes more stable and durable operation state of the diaphragm valve through the buffering and resetting function of the spring, in addition, the stop block arranged in the pipe, the sealing ring and the fixed screw connection mode between the mounting seat and the pipe further enhance the stability and sealing performance of the overall structure, effectively avoid the medium leakage and the external impurities invasion, reduce the possibility of loosening or damage of the diaphragm and valve rod connection part caused by corrosion or pollution. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the appearance structure of the diaphragm valve of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of the diaphragm valve of the utility model;

[0017] Figure 3 It is a schematic diagram of the internal structure of the diaphragm valve of the utility model; Figure 2 It is an enlarged view of A in the middle.

[0018] Reference numerals in the drawing are:

[0019] 1, pipe; 11, stop block;

[0020] 2, mounting seat; 21, sealing ring; 22, fixed screw;

[0021] 3, valve body; 301, air pipe; 302, pneumatic cavity; 303, hole plate; 304, diaphragm; 305, buffer pad; 306, valve rod; 307, spring; 308, movable cavity; 309, sealing gasket; 310, valve core; 311, fixed plate; 312, pressure gauge. DETAILED DESCRIPTION

[0022] The following description is used to disclose the utility model so that those skilled in the art can realize the utility model. The preferred embodiments in the following description are only as examples, and those skilled in the art can think of other obvious modifications.

[0023] Reference Figures 1-3As shown, a diaphragm valve control structure, including a pipe 1, the inside of the pipe 1 is provided with a stopper 11, the top end of the pipe 1 is fixedly installed with a valve body 3 through a mounting seat 2, the bottom end of the mounting seat 2 is fixedly installed at the top end of the pipe 1 through a sealing ring 21 and a fixing screw 22, the outer surface of the valve body 3 is communicated with a pneumatic chamber 302 through an air pipe 301, the inside top end of the valve body 3 is provided with a hole plate 303, the bottom end of the hole plate 303 is provided with a diaphragm 304, the diaphragm 304 is fixedly connected with a valve rod 306 through a buffer pad 305, the bottom end of the valve rod 306 is fixedly installed with a valve core 310, the outer surface of the valve rod 306 is provided with a sealing pad 309, and the sealing pad 309 is arranged at the top end of the valve core 310, the outer surface of the valve rod 306 is sleeved with a spring 307, the spring 307 is movably installed in an active cavity 308, the outer surface of the valve body 3 is provided with a fixed plate 311, and the top end of the fixed plate 311 is provided with a pressure gauge 312.

[0024] In the scheme, the valve body 3 is the core component of the entire control structure to meet the needs of pneumatic control and fluid control, the hole plate 303 is located at the top of the valve body 3 to ensure that the diaphragm 304 can be uniformly stressed and smoothly moved, the diaphragm 304 is the key element to realize the opening and closing of the valve, which can withstand the change of gas pressure in the pneumatic chamber 302 and convert it into the linear motion of the valve rod 306, the buffer pad 305 is located between the diaphragm 304 and the valve rod 306, which plays a role in buffering and shock absorption, when the diaphragm 304 moves quickly, the buffer pad 305 can absorb part of the impact energy to protect the diaphragm 304 and the valve rod 306 from being damaged, the valve rod 306 is an important component connecting the diaphragm 304 and the valve core 310, which ensures the accuracy and stability of force transmission, through the close cooperation of the valve rod 306 with the sealing pad 309 and the spring 307 in the active cavity 308, under the action of the spring 307, the valve rod 306 can smoothly drive the valve core 310 to move up and down, realizing the opening and closing operation of the valve, the sealing pad 309 is located between the valve rod 306 and the valve body 3, which can effectively prevent the leakage of fluid in the gap between the valve rod 306 and the valve body, ensuring the sealing performance of the valve, the spring 307 is the main driving force source when the valve is closed to ensure that the valve can be quickly and stably closed, inside the active cavity 308, the spring 307 can freely stretch and contract to adjust its length according to the pressure change in the pneumatic chamber 302, thereby realizing precise control of the valve rod 306 and the valve core 310, the fixed plate 311 is installed on the outer surface of the valve body 3 for fixing and supporting the pressure gauge 312, the pressure gauge 312 can display the pressure change in the pneumatic chamber 302 in real time to provide intuitive reference data for the operator, by monitoring the reading of the pressure gauge 312, the operator can timely adjust the pressure parameters of the pneumatic system to ensure the normal work of the valve.

[0025] The utility model discloses a working principle: first, the diaphragm valve is fixed in the top of through pipe 1 through mounting seat 2, and mounting seat 2 is tightly connected with through pipe 1 through sealing washer 21 and fixed screw 22, and the sealing property between valve body 3 and through pipe 1 is ensured, when needing to control the fluid flow in through pipe 1, the outside gas source injects or extracts gas to pneumatic cavity 302 through air pipe 301, along with the change of gas pressure in pneumatic cavity 302, the pressure acts on diaphragm 304 through hole plate 303, and diaphragm 304 is as the key component of pressure transmission, and its shape change will directly drive valve rod 306 to move up and down, between diaphragm 304 and valve rod 306, set up buffer pad 305, to reduce the direct impact of diaphragm 304 to valve rod 306 when acting, and ensure the stability of action, when moving under the impetus of diaphragm 304, valve rod 306 will drive valve core 310 fixed at the bottom of valve rod 306 to move up and down, and valve core 310 is as the key component of controlling fluid on-off, and its position change will directly determine the on-off state of through pipe 1, and the outer surface of valve rod 306 is still covered with sealing washer 309, and the sealing washer 309 is located at the top of valve core 310, effectively prevents fluid from leaking when valve core 310 is closed, and, in order to ensure that valve rod 306 can reset stably and reliably, spring 307 is still covered on the outer surface of valve rod 306, and the spring 307 is movably installed in movable cavity 308, when the gas pressure in pneumatic cavity 302 reduces or disappears, the elastic force of spring 307 will drive valve rod 306 and valve core 310 to return to the initial position, to realize the automatic closing of valve, in addition, in order to facilitate monitoring the pressure change in pneumatic cavity 302 and the working state of the whole diaphragm valve, the outer surface of valve body 3 is still provided with fixed plate 311, and pressure gauge 312 is installed on it, and pressure gauge 312 can display the pressure value in pneumatic cavity 302 in real time, to provide intuitive reference information for operating personnel, to meet the demand of staff.

[0026] The basic principle, main features and advantages of the utility model are shown and described above. The skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and description in the specification are only the principles of the utility model. The utility model can have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the claimed utility model. The protection scope required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A diaphragm valve control structure comprising a through pipe (1), characterized in that, The top end of the pipe (1) is fixedly provided with a valve body (3) through a mounting base (2), the inner top end of the valve body (3) is provided with a hole plate (303), the bottom end of the hole plate (303) is provided with a diaphragm (304), the bottom end of the diaphragm (304) is fixedly connected with a valve rod (306) through a buffer pad (305), and the bottom end of the valve rod (306) is fixedly provided with a valve core (310).

2. A diaphragm valve control structure according to claim 1, characterized in that: The inside of the pipe (1) is provided with a stop block (11).

3. A diaphragm valve control structure according to claim 1, wherein: The bottom end of the mounting base (2) is fixedly installed at the top end of the pipe (1) through a sealing ring (21) and a fixing screw (22).

4. The diaphragm valve control structure of claim 1, wherein: The outer surface of the valve rod (306) is provided with a sealing gasket (309), and the sealing gasket (309) is arranged at the top end of the valve core (310).

5. A diaphragm valve control structure according to claim 1, wherein: The outer surface of the valve rod (306) is sleeved with a spring (307), and the spring (307) is movably installed in the inside of a movable cavity (308).

6. A diaphragm valve control structure according to claim 1, wherein: The outer surface of the valve body (3) is communicated with a pneumatic cavity (302) through a trachea (301).

7. A diaphragm valve control structure according to claim 1, wherein: The outer surface of the valve body (3) is provided with a fixed plate (311), and the top end of the fixed plate (311) is provided with a pressure gauge (312).

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