Pneumatic valve with hand wheel

Abstract

The utility model relates to a pneumatic valve, in particular to a pneumatic valve with a hand wheel, which comprises a valve body, a valve rod for opening and closing the valve body is arranged in the valve body, a piston is fixed on the valve rod, and an air cavity for controlling the piston in a matching manner is arranged between the piston and the valve body. The pneumatic valve comprises a valve body, an air cavity is arranged on one side of the valve body, a piston is arranged on the other side of the air cavity, a hand wheel assembly for controlling the piston to move is arranged on the other side, opposite to the air cavity, in the valve body, and the piston achieves opening and closing of the valve body through matching of the air cavity or the hand wheel assembly. The double-control system enables the pneumatic valve to have double insurance, the functionality is enhanced, the application range is wider, and the double-control pneumatic valve further has the advantages of being simple in structure, convenient to machine, easy to assemble and high in practicability.

Description

Technical Field

[0001] The utility model relates to a pneumatic valve, in particular to a pneumatic valve with a hand wheel. Background Art

[0002] Ordinary pneumatic valves have a piston forming an air cavity, which is used to cooperate with the air intake device to make the piston reciprocate to open and close the valve. This is also the case with the announcement number CN220248934U, which is called "A linear piston valve actuator". This valve has no emergency or dual control function. How to provide dual control function for pneumatic valves is the technical problem we need to solve now. Utility Model Content

[0003] In view of the deficiencies in the existing technology, the utility model provides a pneumatic valve with a hand wheel.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a pneumatic valve with a handwheel, characterized in that it includes a valve body, a valve stem for opening and closing the valve body is provided in the valve body, a piston is fixed on the valve stem, an air cavity for cooperating to control the piston is provided between the piston and the valve body, and a handwheel assembly for controlling the movement of the piston is provided in the valve body and on the other side relative to the air cavity, and the piston realizes the opening and closing of the valve body through the cooperation of the air cavity or the handwheel assembly.

[0005] The handwheel assembly includes a screw threadedly connected to the valve body. A pressure plate that rotates with the screw is provided in the valve body. The pressure plate realizes up and down reciprocating motion through the relative rotation of the screw and the valve body.

[0006] The piston is provided with a guide column for the pressure plate to reciprocate up and down, and the guide column is provided with a fastener for limiting the pressure plate. When the pressure plate moves upward with the screw, the pressure plate and the piston are linked through the cooperation of the fastener and the guide column.

[0007] An elastic device is provided between the pressure plate and the piston to force the pressure plate and the piston to move in opposite directions. The pressure plate is elastically pressed on the piston through the elastic device. When the pressure plate moves downward with the screw, the piston and the pressure plate are linked through the cooperation of the pressure plate and the elastic device.

[0008] The valve body is provided with a through hole for the guide post to pass through, and the guide post realizes limited reciprocating motion on the valve body by cooperating with the through hole.

[0009] The elastic device is a spring structure.

[0010] The screw is rotatably connected to the pressing plate through a bearing.

[0011] The fastener is a nut structure.

[0012] The top of the screw rod and the outside of the valve body are provided with a hand wheel for conveniently rotating the screw rod.

[0013] The utility model discloses a hand wheel device is arranged at the piston of pneumatic valve, and the pneumatic valve can be controlled to open and close by the air cavity, also can be controlled by the hand wheel device, and the double -control system makes the pneumatic valve have double insurance, and the functionality has been enhanced, and the application is wider, the utility model still has the characteristics of simple structure, processing is convenient and easy to assemble, and the practicality is strong. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the sectional view of the utility model. DETAILED DESCRIPTION

[0015] As Figure 1 Shown, a pneumatic valve with hand wheel 57, including valve body 1, be equipped with the valve rod 2 of opening and closing valve body 1 in valve body 1, the valve rod 2 is fixed with piston 3, and piston 3 has the air cavity 4 of cooperation control piston 3 between piston 3 and valve body 1, and the hand wheel assembly 5 of controlling piston 3 movement is equipped with in valve body 1 and relative to the position of another side of air cavity 4, and piston 3 realizes the opening and closing of valve body 1 through the cooperation of air cavity 4 or hand wheel assembly 5, and the up-down direction of the present application is the direction of the drawing of the specification, and air cavity 4 is used in cooperation with the air inlet equipment, and the cooperation relationship of piston 3, air cavity 4 and valve rod 2 is the relatively mature technology in valve field, and here does not make too much elaboration, and the specific use method is seen below.

[0016] The hand wheel assembly 5 includes a screw rod 51 threadedly connected with the valve body 1, and a pressing plate 52 threadedly connected with the screw rod 51 in the valve body 1.

[0017] The piston 3 is provided with a guide column 53 for the up-down reciprocating movement of the pressing plate 52, and the guide column 53 is provided with a fastener 54 for limiting the pressing plate 52.

[0018] An elastic device 55 is provided between the pressure plate 52 and the piston 3 to force the pressure plate 52 and the piston 3 to move in opposite directions. The pressure plate 52 is elastically pressed on the piston 3 by the elastic device 55. When the pressure plate 52 moves downward with the screw 51, the piston 3 and the pressure plate 52 are linked by the cooperation between the pressure plate 52 and the elastic device 55. The elastic device 55 always presses the piston 3. When the pressure plate 52 moves downward, the pressure plate 52 compresses the elastic device 55. In order to overcome the elastic pressure, the elastic device 55 applies force to the piston 3, and the piston 3 moves downward with the pressure plate 52.

[0019] The valve body 1 is provided with a through hole (not shown in the figure) for the guide column 53 to pass through. The guide column 53 realizes limited reciprocating motion on the valve body 1 by cooperating with the through hole. The through hole is provided on the valve body 1 mainly to provide structural stability for the guide column 53 during the reciprocating motion. In addition, the top of the guide column 53 protrudes from the valve body 1 to facilitate checking the opening and closing status of the valve body 1.

[0020] The elastic device 55 is a spring structure. The elastic device 55 preferably adopts a spring structure because it is easy to install and has low cost.

[0021] The screw rod 51 is rotatably connected to the pressing plate 52 via a bearing 56 , and a nut structure can be installed at the bottom of the bearing 56 for assembly.

[0022] The fastener 54 is a nut structure, and the fastener 54 preferably adopts a nut structure because it is easy to assemble and has low cost.

[0023] A hand wheel 57 is provided at the top of the screw rod 51 and relative to the outside of the valve body 1 for facilitating the rotation of the screw rod 51 .

[0024] Directions:

[0025] When the air chamber 4 is used to control the valve, the air intake and exhaust in the air chamber 4 causes the piston 3 to move up and down to control the opening and closing of the valve;

[0026] When the handwheel 57 is used to control the valve, when the handwheel 57 moves the pressure plate 52 upward, the cooperation between the fastener 54 and the guide column 53 causes the piston 3 to move upward as well. When the handwheel 57 moves the pressure plate 52 downward, the cooperation between the pressure plate 52 and the elastic device 55 causes the piston 3 to move downward as well.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Without departing from the spirit and scope of the present invention, simple modifications and substitutions by those skilled in the art are within the scope of protection of the present invention.

Claims

1. A pneumatic valve with a handwheel, characterized in that: The invention comprises a valve body (1), a valve stem (2) for opening and closing the valve body (1) is provided in the valve body (1), a piston (3) is fixed on the valve stem (2), an air cavity (4) for cooperating with and controlling the piston (3) is provided between the piston (3) and the valve body (1), a handwheel assembly (5) for controlling the movement of the piston (3) is provided in the valve body (1) and at a position on the other side relative to the air cavity (4), and the piston (3) realizes the opening and closing of the valve body (1) through the cooperation of the air cavity (4) or the handwheel assembly (5).

2. A pneumatic valve with a hand wheel as claimed in claim 1, characterized in that: The handwheel assembly (5) comprises a screw (51) threadedly connected to the valve body (1); a pressure plate (52) is provided in the valve body (1) and is rotatably matched with the screw (51); the pressure plate (52) is moved up and down by the relative rotation of the screw (51) and the valve body (1).

3. A pneumatic valve with a hand wheel as claimed in claim 2, characterized in that: The piston (3) is provided with a guide column (53) for the pressure plate (52) to reciprocate up and down, and the guide column (53) is provided with a fastener (54) for limiting the pressure plate (52). When the pressure plate (52) moves upward along with the screw (51), the pressure plate (52) and the piston (3) are linked by the cooperation of the fastener (54) and the guide column (53).

4. A pneumatic valve with a hand wheel as claimed in claim 3, characterized in that: An elastic device (55) is provided between the pressure plate (52) and the piston (3) to force the pressure plate (52) and the piston (3) to move in opposite directions. The pressure plate (52) is elastically pressed against the piston (3) by the elastic device (55). When the pressure plate (52) moves downward along with the screw (51), the piston (3) and the pressure plate (52) are linked by the cooperation between the pressure plate (52) and the elastic device (55).

5. A pneumatic valve with a hand wheel as claimed in claim 3, characterized in that: The valve body (1) is provided with a through hole for the guide column (53) to pass through, and the guide column (53) realizes limited reciprocating motion on the valve body (1) by cooperating with the through hole.

6. A pneumatic valve with a hand wheel as claimed in claim 4, characterized in that: The elastic device (55) is a spring structure.

7. A pneumatic valve with a hand wheel as claimed in claim 2, characterized in that: The screw (51) is rotatably connected to the pressing plate (52) via a bearing (56).

8. A pneumatic valve with a hand wheel as claimed in claim 3, characterized in that: The fastener (54) is a nut structure.

9. A pneumatic valve with a hand wheel according to any one of claims 2 to 8, characterized in that: A hand wheel (57) for facilitating the rotation of the screw (51) is provided at the top of the screw (51) and relative to the outside of the valve body (1).

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