Pneumatic diaphragm regulating valve

Abstract

The utility model discloses a pneumatic diaphragm regulating valve, and relates to the technical field of pneumatic diaphragm regulating valves. The bottom of the connecting body is fixedly connected with a corrugated diaphragm, a valve rod is arranged in the diaphragm chamber in a penetrating mode, the bottom of the stroke cavity is fixedly connected with a sealing chamber, and a flow guide plate is fixedly connected into the mounting sleeve. And meanwhile, the sealing chamber fixedly connected with the bottom of the stroke cavity is filled with the sealing filler, gas exchange between the top stroke cavity and the bottom mounting sleeve can be avoided, and liquid leakage caused by poor airtightness of the valve in the using process is avoided.

Description

Technical Field

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

[0002] After searching, a pneumatic diaphragm regulating valve is proposed in the patent document with the announcement number CN 214008237 U, which belongs to the technical field of regulating valves. A pneumatic diaphragm regulating valve includes a pipeline, a sleeve is fixedly connected to the pipeline, a rubber pad is provided between the sleeve and the pipeline, a baffle is fixed to the inner wall of the pipeline, a first avoidance groove and a second avoidance groove are provided on the pipeline, a slide rod is slidably connected to the pipeline, a valve core is fixedly connected to the bottom of the slide rod, a stopper is fixedly connected to the end of the slide rod away from the valve core, a first return spring is sleeved on the slide rod, the two ends of the first return spring are respectively against the stopper and the inner wall of the second avoidance groove, a bottom cover is fixedly connected to the end of the sleeve away from the pipeline, a top cover is fixedly connected to the outer wall of the bottom cover, and a control mechanism is provided inside the top cover and the bottom cover; the utility model has a simple structure, good sealing effect, simple manufacturing process, can meet people's use needs, is convenient for later maintenance, and greatly saves costs;

[0003] However, there are certain defects. The device uses a piston to increase the force required to drive the air pump, and only uses a rubber gasket to seal the interface between the sleeve and the pipe. The rubber gasket will be damaged after long-term use, causing liquid leakage. At the same time, the device cannot mark the stroke of the valve stem. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a pneumatic diaphragm regulating valve, which solves the problem of using a rubber gasket to seal the interface between the sleeve and the pipeline, the rubber gasket will be damaged after long-term use, causing liquid leakage, and the device cannot mark the stroke of the valve stem.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a pneumatic diaphragm regulating valve comprising a diaphragm chamber, an inner wall of the diaphragm chamber having a connecting groove formed therein, a connector fixedly connected to the interior of the connecting groove, a corrugated diaphragm fixedly connected to the bottom of the connector, a valve stem extending through the interior of the diaphragm chamber, the valve stem passing through the corrugated diaphragm, a stroke chamber fixedly connected to the bottom of the diaphragm chamber, a sealing chamber fixedly connected to the bottom of the stroke chamber, a mounting sleeve fixedly connected to the bottom of the sealing chamber, a valve stem disposed within the stroke chamber having limit blocks protruding at both ends, a stroke pointer fixedly connected to one end of the limit block, a stroke scale fixedly connected to the inner wall of the stroke chamber, a sealing filler filled within the sealing chamber, and a guide plate fixedly connected to the interior of the mounting sleeve.

[0006] Preferably, a sealing ring is fixedly connected to the top of the membrane chamber, and the sealing ring is sleeved on the top of the valve stem.

[0007] Preferably, a telescopic spring is fixedly connected to the bottom of the corrugated diaphragm, the telescopic spring is sleeved on the outside of the valve stem, and the bottom of the telescopic spring is fixedly connected to the bottom of the inner cavity of the diaphragm chamber.

[0008] Preferably, a rubber gasket is fixedly connected to the bottom of the inner cavity of the stroke cavity, and the rubber gasket is sleeved on the outside of the valve stem.

[0009] Preferably, a sealing flange protrudes outward from the bottom of the sealing chamber, and screws are rotatably connected inside the sealing flange, and the sealing chamber and the mounting sleeve are connected by the screws.

[0010] Preferably, valve cores are raised at both ends of the bottom of the valve stem, a hole is opened in the middle of the guide plate and a second rubber gasket is fixedly connected inside, one end of the guide plate is bent upward and fixedly connected to the top of the inner cavity of the mounting sleeve, and the other end of the guide plate is bent downward and fixedly connected to the bottom of the inner cavity of the mounting sleeve.

[0011] Preferably, the top diameter of the corrugated diaphragm is larger than the bottom diameter.

[0012] The utility model provides a pneumatic diaphragm regulating valve. Compared with the prior art, it has the following beneficial effects:

[0013] 1. A pneumatic diaphragm regulating valve, in which an air pump installed outside the device pushes the valve stem downward. Due to the corrugated structure of the corrugated diaphragm, when the valve stem drives the up and down movement, the surface will not be cracked due to repeated bending, thereby affecting the air tightness of the valve. At the same time, the sealing chamber fixedly connected to the bottom of the stroke chamber is filled with sealing filler, which can avoid gas exchange between the top stroke chamber and the bottom mounting sleeve, and prevent liquid leakage due to poor air tightness of the valve during use.

[0014] 2. A pneumatic diaphragm regulating valve, which moves inside the stroke chamber through a limit block raised above the valve stem. A travel pointer fixedly connected to one end of the limit block can indicate the scale indicated on the travel scale fixedly connected to the inner wall of the stroke chamber. The valve control system sends a regulating signal, and changes the compression amount of the corrugated diaphragm and the position of the valve stem by adjusting the air source pressure, thereby changing the opening of the valve core set at the bottom of the valve stem. The flow rate or pressure of the fluid medium can be adjusted by controlling the opening of the valve core inside the guide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2This is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 3 For this utility model Figure 2 Enlarged view of point A;

[0018] Figure 4 For this utility model Figure 2 Enlarged view of point B.

[0019] In the figure: 1. Diaphragm chamber; 100. Connecting groove; 2. Valve stem; 200. Limit block; 201. Valve core; 3. Corrugated diaphragm; 300. Connector; 4. Stroke chamber; 400. Stroke scale; 401. Stroke pointer; 402. Rubber gasket; 5. Sealing chamber; 500. Sealing packing; 501. Sealing flange; 502. Screw; 6. Mounting sleeve; 7. Guide plate; 700. Second rubber gasket; 8. Telescopic spring; 9. Sealing ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-4The utility model provides a technical solution: a pneumatic diaphragm regulating valve. It includes a diaphragm chamber 1, the inner wall of the diaphragm chamber 1 is provided with a connecting groove 100, the interior of the connecting groove 100 is fixedly connected with a connector 300, the bottom of the connector 300 is fixedly connected with a corrugated diaphragm 3, the corrugated diaphragm 3 serves as an actuator, and realizes the opening and closing of the valve core 201 by adjusting the air pressure, thereby controlling the flow of the medium, the interior of the diaphragm chamber 1 is penetrated by a valve stem 2, the valve stem 2 passes through the corrugated diaphragm 3, the bottom of the diaphragm chamber 1 is fixedly connected with a stroke cavity 4, the bottom of the stroke cavity 4 is fixedly connected with a sealing chamber 5, the bottom of the sealing chamber 5 is fixedly connected with a mounting sleeve 6, the valve stem 2 arranged in the stroke cavity 4 has a limit block 200 protruding at both ends, one end of the limit block 200 is fixedly connected with a stroke pointer 401, and the inner wall of the stroke cavity 4 is fixedly connected with a stroke scale 400, According to the scale indication on the stroke scale 400 fixedly connected to the inner wall of the stroke chamber 4, the valve control system sends a regulating signal to change the compression amount of the corrugated diaphragm 3 and the position of the valve stem 2 by adjusting the air source pressure, thereby changing the opening of the valve core 201 set at the bottom of the valve stem 2. By controlling the opening of the valve core 201 inside the guide plate 7, the flow rate or pressure of the fluid medium can be adjusted, thereby controlling the flow rate. The interior of the sealing chamber 5 is filled with sealing filler 500. Commonly used sealing fillers 500 include asbestos fabric, carbon fiber, rubber, flexible graphite and engineering plastics, etc., which are prefabricated in rings or strips. Some need to be pre-impregnated with fillers with good lubricity, and are filled in the interior of the sealing chamber 5 with a multi-ring or spiral multi-layer structure. The interior of the mounting sleeve 6 is fixedly connected to the guide plate 7.

[0022] See also Figure 1-4 The top of the membrane chamber 1 is fixedly connected with a sealing ring 9, which is sleeved on the top of the valve stem 2. The bottom of the corrugated diaphragm 3 is fixedly connected with a telescopic spring 8. The telescopic spring 8 is used to compress the telescopic spring 8 when the top air pump drives the valve stem 2 to descend, and then drive the valve stem 2 to reset. The telescopic spring 8 is sleeved on the outside of the valve stem 2. The bottom of the telescopic spring 8 is fixedly connected to the bottom of the inner cavity of the membrane chamber 1. The bottom of the inner cavity of the stroke cavity 4 is fixedly connected with a rubber gasket 402, which is sleeved on the outside of the valve stem 2. The bottom of the sealing chamber 5 protrudes outward with a sealing flange 501, and the internal rotation of the sealing flange 501 is connected with a screw 502, the sealing chamber 5 and the mounting sleeve 6 are connected by screws 502, and valve cores 201 are raised at both ends of the bottom of the valve stem 2. A hole is opened in the middle of the guide plate 7 and a second rubber gasket 700 is fixedly connected inside. The second rubber gasket 700 is used to prevent liquid from leaking from the holes between the valve core 201 and the guide plate 7 when the valve core 201 adjusts the flow at both ends of the guide plate 7, thereby increasing the sealing performance. One end of the guide plate 7 is bent upward and fixedly connected to the top of the inner cavity of the mounting sleeve 6, and the other end of the guide plate 7 is bent downward and fixedly connected to the bottom of the inner cavity of the mounting sleeve 6. The top diameter of the corrugated diaphragm 3 is larger than the bottom diameter.

[0023] During use, when it is necessary to adjust the flow inside the mounting sleeve 6, the valve stem 2 is pushed downward by an air pump arranged outside the device. Due to the corrugated structure of the corrugated diaphragm 3, when the valve stem 2 drives the up and down movement, the surface will not be cracked due to repeated bending, thereby affecting the air tightness of the valve. At the same time, the sealing filler 500 is filled inside the sealing chamber 5 fixedly connected to the bottom of the stroke chamber 4, which can avoid gas exchange between the top stroke chamber 4 and the bottom mounting sleeve 6. The stroke pointer 401 fixedly connected to one end of the limit block 200 can indicate the scale indicated on the stroke scale 400 fixedly connected to the inner wall of the stroke chamber 4. The valve control system sends a regulating signal to change the compression amount of the corrugated diaphragm 3 and the position of the valve stem 2 by adjusting the air source pressure, thereby changing the opening of the valve core 201 arranged at the bottom of the valve stem 2. The flow or pressure of the fluid medium can be adjusted by controlling the opening of the valve core 201 inside the guide plate 7.

[0024] In this embodiment, a pneumatic diaphragm regulating valve, among the above components, its own structural features and working principles all adopt the existing technology and will not be described in detail here.

[0025] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic diaphragm regulating valve, comprising a diaphragm chamber (1), characterized in that: The inner wall of the membrane chamber (1) is provided with a connecting groove (100), the interior of the connecting groove (100) is fixedly connected with a connecting body (300), the bottom of the connecting body (300) is fixedly connected with a corrugated diaphragm (3), the interior of the membrane chamber (1) is provided with a valve stem (2), the valve stem (2) passes through the corrugated diaphragm (3), the bottom of the membrane chamber (1) is fixedly connected with a stroke chamber (4), the bottom of the stroke chamber (4) is fixedly connected with a sealing chamber (5), The bottom of the sealing chamber (5) is fixedly connected to a mounting sleeve (6), the valve stem (2) arranged inside the stroke chamber (4) has limit blocks (200) protruding at both ends, one end of the limit block (200) is fixedly connected to a stroke pointer (401), the inner wall of the stroke chamber (4) is fixedly connected to a stroke scale (400), the interior of the sealing chamber (5) is filled with sealing filler (500), and the interior of the mounting sleeve (6) is fixedly connected to a guide plate (7).

2. The pneumatic diaphragm regulating valve according to claim 1, characterized in that: A sealing ring (9) is fixedly connected to the top of the membrane chamber (1), and the sealing ring (9) is sleeved on the top of the valve stem (2).

3. The pneumatic diaphragm regulating valve according to claim 1, characterized in that: The bottom of the corrugated diaphragm (3) is fixedly connected to a telescopic spring (8), the telescopic spring (8) is sleeved on the outside of the valve stem (2), and the bottom of the telescopic spring (8) is fixedly connected to the bottom of the inner cavity of the diaphragm chamber (1).

4. The pneumatic diaphragm regulating valve according to claim 1, characterized in that: A rubber gasket (402) is fixedly connected to the bottom of the inner cavity of the stroke cavity (4), and the rubber gasket (402) is sleeved on the outside of the valve stem (2).

5. The pneumatic diaphragm regulating valve according to claim 1, characterized in that: A sealing flange (501) protrudes outward from the bottom of the sealing chamber (5), and a screw (502) is rotatably connected inside the sealing flange (501). The sealing chamber (5) and the mounting sleeve (6) are connected via the screw (502).

6. The pneumatic diaphragm regulating valve according to claim 4, characterized in that: The bottom ends of the valve stem (2) are provided with valve cores (201), a hole is provided in the middle of the guide plate (7) and a second rubber gasket (700) is fixedly connected inside the guide plate (7), one end of the guide plate (7) is bent upward and fixedly connected to the top of the inner cavity of the mounting sleeve (6), and the other end of the guide plate (7) is bent downward and fixedly connected to the bottom of the inner cavity of the mounting sleeve (6).

7. The pneumatic diaphragm regulating valve according to claim 3, characterized in that: The top diameter of the corrugated diaphragm (3) is larger than the bottom diameter.

Images