An integrated pneumatic control valve

Abstract

The utility model discloses an integral pneumatic control valve, specifically relates to the technical field of control valves, including a valve body and a pneumatic chamber connected to the top of the valve body, an inlet and an outlet are respectively arranged on both sides of the valve body, an inner tube is installed inside the valve body, the inner tube divides the inside of the valve body into a front valve chamber and a rear valve chamber, the opening of the inner tube faces the inlet side, and upper and lower groups of valve parts are arranged at the top and bottom of the inner tube, the upper and lower groups of valve parts are used to control the on and off of the front valve chamber and the rear valve chamber, a valve stem is passed through the upper and lower groups of valve parts, and the valve stem extends upward through the valve body to the inside of the pneumatic chamber. The utility model realizes the adjustment of the closing and opening of the inside of the valve body by arranging a rubber hose that is inflated and deflated and contracted with the change of the air pressure in the pneumatic chamber in coordination with the movable valve core, so as to make the sealing fit at the valve core tighter, reduce the degradation of the sealing performance due to the extension of time, and improve the practicality.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, and more specifically, to an integrated pneumatic control valve. Background Art

[0002] Pneumatic control valves refer to various pneumatic components that control the pressure, flow rate and flow direction of airflow in pneumatic systems and ensure the normal operation of pneumatic actuators or mechanisms. After a long period of operation, the pneumatic actuator drives the valve core to open and close the valve body, and the valve core and valve seat are prone to poor sealing, affecting the normal opening and closing of the valve body. Utility Model Content

[0003] To solve the above technical problems, the utility model provides an integral pneumatic control valve, including a valve body and a pneumatic chamber connected to the top end of the valve body, an inlet and an outlet are respectively arranged on both sides of the valve body, an inner tube is installed inside the valve body, the inner tube divides the interior of the valve body into a front valve chamber and a rear valve chamber, the opening of the inner tube faces the inlet side, and an upper and lower group of valve parts are arranged at the top and bottom ends of the inner tube, the upper and lower groups of valve parts are used to control the on and off of the front valve chamber and the rear valve chamber, a valve stem passes through the upper and lower groups of valve parts, the valve stem extends upward through the valve body to the inside of the pneumatic chamber, and a diaphragm disk fixed to the top end of the valve stem is arranged in the pneumatic chamber.

[0004] In a preferred embodiment, the pneumatic chamber includes a lower cover installed on the top of the valve body and an upper cover detachably connected to the lower cover, and a diaphragm fixed between the upper cover and the lower cover is installed at the edge of the diaphragm disk. The pneumatic chamber is divided into an upper pressure regulating chamber and a lower pressure regulating chamber by the diaphragm disk and the diaphragm.

[0005] In a preferred embodiment, a regulating pipe extending into the rear valve chamber in the valve body is installed on the outer wall of the upper cover, and a shunt pipe connected to the valve member is installed at the end of the regulating pipe located inside the rear valve chamber.

[0006] In a preferred embodiment, the valve component includes an upper valve seat and a lower valve seat respectively installed at the top and bottom ends of the inner tube, and movable valve cores are arranged inside the upper valve seat and the lower valve seat, and the valve stem passes through the two valve cores and drives the valve cores to perform lifting and lowering movements. Rubber hoses are embedded on the inner side walls of the upper valve seat and the lower valve seat, and the interior of the rubber hose is hollow. The interior of the rubber hose is connected to the interior of the upper pressure regulating chamber through a shunt pipe and a regulating pipe.

[0007] In a preferred embodiment, a detachable lower valve cover is installed at the bottom end of the valve body, the bottom end of the valve stem passes through the lower valve cover, a spring is installed at the bottom of the valve core located in the lower valve seat, and the spring is sleeved on the outside of the valve stem and the bottom end is connected to the lower valve cover.

[0008] In a preferred embodiment, a pressure pipe communicating with the interior of the lower pressure regulating chamber is installed at the bottom of the lower cover.

[0009] Technical effects and advantages of the utility model:

[0010] By providing a rubber hose that inflates and deflates as the air pressure in the pneumatic chamber changes, in cooperation with a movable valve core, the closing and opening of the valve body can be adjusted, the seal at the valve core can be made tighter, the degradation of the sealing performance due to the extension of time can be reduced, and the practicality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of the utility model when closed;

[0012] Figure 2 It is a schematic diagram of the structure when the utility model is opened.

[0013] Explanation of the reference numerals: 1 valve body, 2 pneumatic chamber, 3 inlet, 4 outlet, 5 inner tube, 6 front valve chamber, 7 rear valve chamber, 8 valve stem, 9 diaphragm disk, 10 lower cover, 11 upper cover, 12 diaphragm, 13 upper pressure regulating chamber, 14 lower pressure regulating chamber, 15 regulating tube, 16 diverter tube, 17 upper valve seat, 18 lower valve seat, 19 valve core, 20 rubber hose, 21 lower valve cover, 22 spring, 23 pressure tube. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

[0015] like Figure 1-2 An integral pneumatic control valve is shown, comprising a valve body 1 and a pneumatic chamber 2 connected to the top end of the valve body 1, an inlet 3 and an outlet 4 are respectively arranged on both sides of the valve body 1, an inner tube 5 is installed inside the valve body 1, the inner tube 5 divides the interior of the valve body 1 into a front valve chamber 6 and a rear valve chamber 7, the opening of the inner tube 5 faces the inlet 3, and two upper and lower groups of valve components are arranged at the top and bottom ends of the inner tube 5, the upper and lower groups of valve components are used to control the on and off of the front valve chamber 6 and the rear valve chamber 7, a valve stem 8 passes through the upper and lower groups of valve components, the valve stem 8 extends upward through the valve body 1 to the inside of the pneumatic chamber 2, and a diaphragm disk 9 fixed to the top end of the valve stem 8 is arranged in the pneumatic chamber 2.

[0016] Furthermore, the inlet 3 is connected to the front valve chamber 6 in the inner tube 5, and the two are arranged as an integral whole. In the valve body 1, except for the front valve chamber 6 in the inner tube 5, the remaining area is the rear valve chamber 7, which is connected to the outlet 4. The interior of the valve body 1 is divided into two areas by the inner tube 5, and the two areas are connected by two sets of valve components above and below the inner tube 5.

[0017] The pneumatic chamber 2 includes a lower cover 10 installed on the top of the valve body 1 and an upper cover 11 detachably connected to the lower cover 10. A diaphragm 12 fixed between the upper cover 11 and the lower cover 10 is installed at the edge of the diaphragm disc 9. The pneumatic chamber 2 is divided into an upper pressure regulating chamber 13 and a lower pressure regulating chamber 14 by the diaphragm disc 9 and the diaphragm 12.

[0018] The upper pressure regulating chamber 13 and the lower pressure regulating chamber 14 are two independently divided areas, which are not connected to each other. When one of them becomes larger, it will push the diaphragm disk 9 to move, causing the diaphragm 12 to deform and making the other pressure regulating chamber smaller.

[0019] An adjusting pipe 15 extending into the rear valve chamber 7 in the valve body 1 is installed on the outer wall of the upper cover 11, and a shunt pipe 16 connected to the valve member is installed at the end of the adjusting pipe 15 located inside the rear valve chamber 7;

[0020] The valve member comprises an upper valve seat 17 and a lower valve seat 18 respectively mounted at the top and bottom of the inner tube 5, and a movable valve core 19 is arranged inside the upper valve seat 17 and the lower valve seat 18, and the valve stem 8 penetrates the two valve cores 19 and drives the valve core 19 to move up and down, and a rubber hose 20 is embedded on the inner side wall of the upper valve seat 17 and the lower valve seat 18, and the inside of the rubber hose 20 is hollow, and the inside of the rubber hose 20 is connected with the inside of the upper pressure regulating chamber 13 through the shunt pipe 16 and the regulating pipe 15;

[0021] On the basis of the above, the top end of the valve stem 8 is connected to the diaphragm disk 9 in the pneumatic chamber 2. When the air pressure in the two pressure regulating chambers changes, driving the valve stem 8 to move up and down, the two valve cores 19 on the valve stem 8 will move up and down on the upper valve seat 17 and the lower valve seat 18, changing the positional relationship between the upper valve seat 17 and the lower valve seat 18 and the valve core 19.

[0022] Furthermore, when the valve body 1 is closed, that is, the front valve chamber 6 and the rear valve chamber 7 are not connected to each other, the diaphragm disc 9 is located at an upper position in the pneumatic chamber 2, the valve stem 8 is located at an upper position as a whole, and the two valve cores 19 are respectively against the upper valve seat 17 and the lower valve seat 18 of the inner tube 5, and the outer wall of the valve core 19 is attached to the two rubber hoses 20 on the upper valve seat 17 and the lower valve seat 18, squeezing the rubber hoses 20 to deform, so that the gap between the valve core 19 and the valve seat is tightly attached, and effective sealing is achieved;

[0023] Based on the above, when the valve body 1 needs to be opened, the air pressure inside the pneumatic chamber 2 is changed to increase the area of ​​the upper pressure regulating chamber 13, pushing the diaphragm disk 9 downward in the pneumatic chamber 2, driving the valve stem 8 to move downward, so that the valve core 19 is separated from the upper valve seat 17 and the lower valve seat 18, and the front valve chamber 6 inside the inner tube 5 is connected to the rear valve chamber 7 on the other side.

[0024] A detachable lower valve cover 21 is installed at the bottom end of the valve body 1, and the bottom end of the valve stem 8 passes through the lower valve cover 21. A spring 22 is installed at the bottom of the valve core 19 located in the lower valve seat 18. The spring 22 is sleeved on the outside of the valve stem 8 and the bottom end is connected to the lower valve cover 21.

[0025] A pressure pipe 23 communicating with the interior of the lower pressure regulating chamber 14 is installed at the bottom of the lower cover 10 .

[0026] Based on the above, when the valve body 1 needs to be closed, gas is transported to the lower pressure regulating chamber 14 through the pressure pipe 23, so that the internal air pressure of the lower pressure regulating chamber 14 increases, pushing the diaphragm disc 9 upward to drive the diaphragm 12 to deform, and the gas in the upper pressure regulating chamber 13 enters the rubber hose 20 of the upper valve seat 17 and the lower valve seat 18 through the regulating pipe 15 and the shunt pipe 16, so that the rubber hose 20 is inflated, deformed and bulged, and when the diaphragm disc 9 moves upward, it will drive the valve stem 8 to move upward in the valve body 1 and the pneumatic chamber 2, and the valve stem 8 drives the valve core 19 to move upward at the inner tube 5, and the valve core 19 on the valve stem 8 fits with the upper valve seat 17 and the lower valve seat 18 on the inner tube 5, and because the rubber hose 20 is inflated and bulged, the valve core 19 will fit more closely with it, thereby ensuring the sealing performance of the valve core 19 and the valve seat to avoid leakage.

[0027] Furthermore, because the upward movement of the valve core 19 will push the valve stem 8 upward, the upward movement of the valve stem 8 will push the diaphragm disk 9 upward, so that the gas in the upper pressure regulating chamber 13 is filled into the rubber hose 20, thereby forming a bulge of the rubber hose 20 and fitting closely with the valve core 19, forming a cycle to ensure effective sealing.

[0028] Based on the above, when the valve body 1 is opened, the air in the lower pressure regulating chamber 14 is pumped outward through the pressure tube 23 to reduce its pressure, and the diaphragm disk 9 moves downward to pull the valve stem 8 downward, and the valve stem 8 drives the valve core 19 to separate from the upper valve seat 17 and the lower valve seat 18. At the same time, the downward movement of the valve stem 8, the diaphragm disk 9 and the diaphragm 12 will enlarge the upper pressure regulating chamber 13, and the air in the rubber hose 20 will be pumped into the upper pressure regulating chamber 13 through the shunt tube 16 and the regulating tube 15, so that the valve seat can be quickly opened.

[0029] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. An integrated pneumatic control valve, characterized in that: The invention comprises a valve body and a pneumatic chamber connected to the top end of the valve body, an inlet and an outlet are respectively arranged on both sides of the valve body, an inner tube is installed inside the valve body, the inner tube divides the inside of the valve body into a front valve chamber and a rear valve chamber, the opening of the inner tube faces the inlet side, and an upper and lower group of valve parts are arranged at the top and bottom ends of the inner tube, the upper and lower groups of valve parts are used to control the on-off of the front valve chamber and the rear valve chamber, a valve stem passes through the upper and lower groups of valve parts, the valve stem extends upward through the valve body to the inside of the pneumatic chamber, and a diaphragm disk fixed at the top end of the valve stem is arranged in the pneumatic chamber.

2. An integrated pneumatic control valve according to claim 1, characterized in that: The pneumatic chamber includes a lower cover installed on the top of the valve body and an upper cover detachably connected to the lower cover. A diaphragm fixed between the upper cover and the lower cover is installed at the edge of the diaphragm disk. The pneumatic chamber is divided into an upper pressure regulating chamber and a lower pressure regulating chamber by the diaphragm disk and the diaphragm.

3. An integrated pneumatic control valve according to claim 2, characterized in that: An adjusting pipe extending to the rear valve chamber in the valve body is installed on the outer wall of the upper cover, and a shunt pipe connected with the valve element is installed at the end of the adjusting pipe located in the rear valve chamber.

4. An integrated pneumatic control valve according to claim 3, characterized in that: The valve component includes an upper valve seat and a lower valve seat respectively installed at the top and bottom ends of the inner tube, and movable valve cores are arranged inside the upper valve seat and the lower valve seat, and the valve stem passes through the two valve cores and drives the valve cores to move up and down, and rubber hoses are embedded on the inner side walls of the upper valve seat and the lower valve seat, and the inside of the rubber hose is hollow, and the inside of the rubber hose is connected to the inside of the upper pressure regulating chamber through a shunt pipe and a regulating pipe.

5. An integrated pneumatic control valve according to claim 4, characterized in that: A detachable lower valve cover is installed at the bottom end of the valve body, the bottom end of the valve stem passes through the lower valve cover, a spring is installed at the bottom of the valve core located in the lower valve seat, the spring is sleeved outside the valve stem and the bottom end is connected to the lower valve cover.

6. The integrated pneumatic control valve according to claim 2, characterized in that: A pressure pipe communicating with the interior of the lower pressure regulating chamber is installed at the bottom of the lower cover.

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