Flange type pneumatic stop valve

Abstract

The utility model relates to the technical field of stop valves, and discloses a flange type pneumatic stop valve, which comprises a valve body, a valve rod, a valve rod and a flange, the valve rod is arranged at the bottom of the air cylinder, a connecting opening is formed in the upper surface of the valve body, the valve rod extends into an inner cavity of the valve body through the connecting opening, and a communicating opening is formed in the middle of the inner cavity of the valve body; the mounting plate is arranged at the lower part of the valve rod, and a valve clack is mounted at the bottom end of the valve rod; and the extrusion spring is arranged at the bottom of the mounting plate. The additionally-arranged air cylinder drives the valve rod to move upwards so that the valve clack can be driven to move upwards to be separated from the communicating opening, the valve rod continues to drive the valve clack to move upwards so that the sealing plate can be separated from the surface of the communicating opening, fluid can flow into the valve body to circulate, and the distance between the valve clack and the communicating opening can also be increased; at the moment, the impact of the fluid on the valve clack is reduced, the abrasion of the valve clack is reduced, and the service life of the device is prolonged.

Description

Technical Field

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

[0002] Pneumatic stop valve is an important control valve, which uses pneumatic force to separate or contact the valve disc with the valve seat, thereby controlling the flow of the medium. The opening and closing part of the pneumatic stop valve is a plug-shaped valve disc, the sealing surface is a plane or a cone, and the valve disc moves linearly along the center line of the fluid.

[0003] Common flange-type pneumatic stop valves are generally composed of valve body, valve cover, valve disc, valve stem and other components. The flow of fluid is controlled by the valve disc. The valve disc and valve seat fit tightly to form a seal, thereby preventing the passage of fluid. However, when the fluid needs to circulate, the valve disc needs to be separated from the valve seat. At this time, the fluid will flow between the valve disc and the valve seat, and the space between the valve disc and the valve seat is small, causing the valve disc to be impacted by the fluid for a long time, increasing the wear of the valve disc and reducing the service life of the device. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the utility model provides a flange type pneumatic stop valve to solve the problem in the above background technology that the valve disc is impacted by the fluid for a long time, which increases the wear of the valve disc and reduces the service life of the device.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model provides the following technical solution: a flange type pneumatic stop valve, comprising:

[0008] A valve body, wherein a cylinder is provided above the valve body;

[0009] A valve stem is arranged at the bottom of the cylinder, a connection port is provided on the upper surface of the valve body, the valve stem extends into the inner cavity of the valve body through the connection port, and a communication port is provided in the middle of the inner cavity of the valve body;

[0010] A mounting plate is arranged at the lower part of the valve stem, and a valve disc is installed at the bottom end of the valve stem;

[0011] The extrusion spring is arranged at the bottom of the mounting plate, and a sealing plate is installed at the bottom of the extrusion spring.

[0012] Preferably, a waterproof cloth is installed on the outer periphery of the bottom of the mounting plate, and the bottom of the waterproof cloth is connected to the upper surface of the sealing plate, so that the extrusion spring can be waterproofed by the waterproof cloth.

[0013] Preferably, a limiting edge is installed on the inner wall of the connecting port, and a limiting groove is provided between the connecting port and the inner wall of the valve body. The limiting edge is used to limit the valve flap so that the valve flap can stably seal the connecting port.

[0014] Preferably, a limiting head is installed at the bottom of the sealing plate, and the limiting head is inserted in the inner cavity of the limiting groove. The limiting head inserted in the limiting groove can limit the sealing plate, thereby stably protecting the valve flap.

[0015] Preferably, first flanges are installed on the upper surface of the valve body and the lower surface of the cylinder, and screws are evenly screwed between the first flanges, so that the valve body and the cylinder can be connected through the first flanges.

[0016] Preferably, water openings are provided on both sides of the valve body, and second flanges are installed on both sides of the valve body, and the valve body can be connected to the pipeline through the second flanges.

[0017] Beneficial Effects

[0018] Compared with the prior art, the utility model provides a flange type pneumatic stop valve, which has the following

[0019] Beneficial effects:

[0020] The flange-type pneumatic stop valve has an additional cylinder that drives the valve stem to move upward, which can drive the valve disc to move upward and separate from the connecting port. At this time, the sealing plate will be squeezed by the extrusion force of the extrusion spring to squeeze the upper surface of the connecting port, so that the fluid will not impact the surface of the valve disc. Continuing to drive the valve disc to move upward by the valve stem can separate the sealing plate from the surface of the connecting port, so that the fluid can flow into the valve body for circulation, and the distance between the valve disc and the connecting port will also increase. At this time, the impact of the fluid on the valve disc will also be reduced, thereby reducing the wear of the valve disc and increasing the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the cylinder of the utility model;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the valve body of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the valve stem of the utility model;

[0025] Figure 5 It is a schematic diagram of the cross-sectional structure of the valve disc of the utility model.

[0026] In the figure: 1. valve body; 2. cylinder; 3. valve stem; 4. connecting port; 5. connecting port; 6. mounting plate; 7. valve disc; 8. extrusion spring; 9. sealing plate; 10. waterproof cloth; 11. limit edge; 12. limit groove; 13. limit head; 14. first flange; 15. second flange. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] The utility model provides a technical solution, a flange type pneumatic stop valve, please refer to Figure 1 , comprising a valve body 1, with a cylinder 2 disposed above the valve body 1;

[0029] See also Figure 4 , valve stem 3, is set at the bottom of cylinder 2, please refer to Figure 3 A connecting port 4 is provided on the upper surface of the valve body 1, and the valve stem 3 extends into the inner cavity of the valve body 1 through the connecting port 4. A connecting port 5 is provided in the middle of the inner cavity of the valve body 1;

[0030] See also Figure 4 , mounting plate 6, arranged at the lower part of valve stem 3, see Figure 5 , a valve disc 7 is installed at the bottom end of the valve stem 3;

[0031] The extrusion spring 8 is arranged at the bottom of the mounting plate 6, and a sealing plate 9 is installed at the bottom of the extrusion spring 8;

[0032] Starting the cylinder 2 can drive the valve stem 3 to move downward, thereby driving the valve disc 7 and the mounting plate 6 to move downward, and then the valve disc 7 can be sealed against the opening of the connecting port 5. The mounting plate 6 will drive the sealing plate 9 to squeeze the upper surface of the connecting port 5 and cover the valve disc 7. When the fluid needs to circulate, the starting cylinder 2 drives the valve stem 3 to move upward, which can drive the valve disc 7 to move upward and separate from the connecting port 5. At this time, the sealing plate 9 will be squeezed by the extrusion force of the extrusion spring 8 to squeeze the upper surface of the connecting port 5, so that the fluid will not impact the surface of the valve disc 7. Continuing to drive the valve disc 7 to move upward through the valve stem 3 can separate the sealing plate 9 from the surface of the connecting port 5, so that the fluid can flow into the valve body 1 for circulation, and the distance between the valve disc 7 and the connecting port 5 will also increase. At this time, the impact of the fluid on the valve disc 7 will also be reduced, thereby reducing the wear of the valve disc 7 and improving the service life of the device.

[0033] A waterproof cloth 10 is installed on the outer periphery of the bottom of the mounting plate 6 , and the bottom of the waterproof cloth 10 is connected to the upper surface of the sealing plate 9 . The extrusion spring 8 can be waterproofed by the waterproof cloth 10 .

[0034] See also Figure 3 A limiting edge 11 is installed on the inner wall of the connecting port 5, and a limiting groove 12 is provided between the connecting port 5 and the inner wall of the valve body 1. The limiting edge 11 is used to limit the valve flap 7 so that the valve flap 7 can stably seal the connecting port 5.

[0035] See also Figure 5 A limiting head 13 is installed at the bottom of the sealing plate 9, and the limiting head 13 is inserted in the inner cavity of the limiting groove 12. The limiting head 13 inserted in the limiting groove 12 can limit the sealing plate 9, so as to stably protect the valve disc 7.

[0036] See also Figure 2 The upper surface of the valve body 1 and the lower surface of the cylinder 2 are both installed with first flanges 14 , and screws are evenly screwed between the first flanges 14 , so that the valve body 1 and the cylinder 2 can be connected through the first flanges 14 .

[0037] See also Figure 3 Water openings are provided on both sides of the valve body 1 , and second flanges 15 are installed on both sides of the valve body 1 , and the valve body 1 can be connected to the pipeline through the second flanges 15 .

[0038] The device first starts the cylinder 2 to drive the valve stem 3 to move downward, thereby driving the valve flap 7 and the mounting plate 6 to move downward, and then the valve flap 7 can seal the opening of the connecting port 5. The mounting plate 6 will drive the sealing plate 9 to squeeze the upper surface of the connecting port 5 to cover the valve flap 7. When the fluid needs to circulate, the extrusion spring 8 can be waterproofed by the waterproof cloth 10, and the valve flap 7 can be limited by the limiting edge 11, so that the valve flap 7 can stably seal the connecting port 5. The limiting head 13 is inserted in the limiting groove 12 to limit the sealing plate 9, so that the valve flap 7 can stably seal the connecting port 5. The valve disc 7 is protected and finally the cylinder 2 is started to drive the valve stem 3 to move upward, which can drive the valve disc 7 to move upward and separate from the connecting port 5. At this time, the sealing plate 9 will be squeezed by the extrusion force of the extrusion spring 8 to squeeze the upper surface of the connecting port 5, so that the fluid will not impact the surface of the valve disc 7. The valve disc 7 is continued to be driven upward by the valve stem 3 to separate the sealing plate 9 from the surface of the connecting port 5, so that the fluid can flow into the valve body 1 for circulation, and the distance between the valve disc 7 and the connecting port 5 will also increase. At this time, the impact of the fluid on the valve disc 7 will also be reduced, thereby reducing the wear of the valve disc 7 and increasing the service life of the device.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flange type pneumatic stop valve, characterized in that: include: A valve body (1), wherein a cylinder (2) is provided above the valve body (1); A valve stem (3) is arranged at the bottom of the cylinder (2); a connection port (4) is provided on the upper surface of the valve body (1); the valve stem (3) extends into the inner cavity of the valve body (1) through the connection port (4); and a communication port (5) is provided in the middle of the inner cavity of the valve body (1); A mounting plate (6) is arranged at the lower part of the valve stem (3), and a valve flap (7) is installed at the bottom end of the valve stem (3); The extrusion spring (8) is arranged at the bottom of the mounting plate (6), and a sealing plate (9) is installed at the bottom of the extrusion spring (8).

2. A flange type pneumatic stop valve according to claim 1, characterized in that: A waterproof cloth (10) is installed on the outer periphery of the bottom of the installation plate (6), and the bottom of the waterproof cloth (10) is connected to the upper surface of the sealing plate (9).

3. A flange type pneumatic stop valve according to claim 1, characterized in that: The inner wall of the communication port (5) is provided with a limiting edge (11), and a limiting groove (12) is provided between the communication port (5) and the inner wall of the valve body (1).

4. A flange type pneumatic stop valve according to claim 3, characterized in that: A limiting head (13) is installed at the bottom of the sealing plate (9), and the limiting head (13) is inserted into the inner cavity of the limiting groove (12).

5. The flange type pneumatic stop valve according to claim 1, characterized in that: The upper surface of the valve body (1) and the lower surface of the cylinder (2) are both mounted with first flanges (14), and screws are evenly screwed between the first flanges (14).

6. A flange type pneumatic stop valve according to claim 1, characterized in that: Water openings are provided on both sides of the valve body (1), and second flanges (15) are installed on both sides of the valve body (1).

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