Ultra-short pneumatic plunger valve

Abstract

The invention discloses an ultra-short pneumatic plunger valve which comprises a cylinder barrel, a valve body and a valve seat, one end of the cylinder barrel is fixedly connected with a cylinder cover, one end of the valve body is fixedly connected with a valve cover, the valve cover is fixed to one end of the cylinder barrel, the valve seat is fixed to one end of the valve body, a plunger is arranged in the valve body, and the plunger is arranged in the cylinder barrel. A plunger is fixedly connected to the outer side wall of the cylinder barrel, one end of the plunger extends into the cylinder barrel, a piston disc is fixedly connected to the end, extending into the cylinder barrel, of the plunger, a controller is fixedly connected to the outer side wall of the cylinder barrel, two limiting inductive switches are connected to the controller, and the two limiting inductive switches are electrically connected with the controller through wires. According to the ultra-short pneumatic plunger valve, the plunger is directly arranged in the cylinder barrel, no support is arranged, the valve can be arranged in a short mode, the position of the plunger can be sensed by additionally arranging the limiting switch on the cylinder cover, the number of the whole components is small, and the valve is short and easy to assemble.

Description

Technical Field

[0001] The invention relates to the field of valve-related products, in particular to an ultra-short pneumatic plunger valve. Background Art

[0002] ‌Pneumatic plunger valve‌ is a commonly used control element, widely used in industrial automation control systems. The plunger valve controls the flow of fluid through the movement of the plunger or piston. Its working principle is based on the lifting and lowering of the plunger to open or close the valve. This type of valve equipment is commonly used in chemical, petroleum, pharmaceutical, food processing, water treatment and other fields. With the advancement of technology, the design and function of the plunger valve are also constantly improving to meet the needs of modern industry for precise flow control. Pneumatic plunger valves generally consist of three major parts: valve body assembly + bracket + pneumatic actuator. The pneumatic actuator is powered by 0.4-0.6Mpa compressed air to open and close the plunger valve; However, the existing conventional pneumatic plunger valve is too long to meet the requirements of narrow space use, and the valve seal is severely worn, has a short life, and is unstable in operation. At the same time, the structure is cumbersome, there are many components, the connection relationship is complicated, the processing and assembly are difficult, the cost is high, and it has defects. Summary of the invention

[0003] The purpose of the present invention is to provide an ultra-short pneumatic plunger valve to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an ultra-short pneumatic plunger valve, comprising a cylinder, a valve body and a valve seat, wherein a cylinder cover is fixedly connected to one end of the cylinder, a valve cover is fixedly connected to one end of the valve body, the valve cover is fixed to one end of the cylinder, and the valve seat is fixed to one end of the valve body. A plunger is provided in the valve body, one end of the plunger extends into the cylinder, a piston disk is fixedly connected to the end of the plunger extending into the cylinder, a controller is fixedly connected to the outer wall of the cylinder, two limit sensing switches are connected to the controller, and the two limit sensing switches are electrically connected to the controller through wires, a delivery pipe is connected to one side of the valve body, one end of the delivery pipe is fixedly connected to a connecting flange, a sealing surface is provided on the top of the valve seat, and an assembly flange is provided on the top of the valve seat.

[0005] Preferably, the cylinder barrel is fixedly connected to the cylinder cover via a plurality of first positioning screws, a first sealing ring is fixedly sleeved on the outer wall of the cylinder cover, and the first sealing ring abuts against the inner wall of the cylinder barrel.

[0006] Preferably, the valve cover and the cylinder cover are both provided with screw holes, and the two limit sensing switches are respectively fixedly installed in the screw holes by fixing nuts.

[0007] Preferably, a second sealing ring and a first guide ring are fixedly sleeved on the piston disc.

[0008] Preferably, a second guide ring is fixedly sleeved on the plunger, a sealing sleeve is fixedly sleeved on one end of the plunger close to the piston disc, and a third sealing ring is fixedly sleeved on both the inner and outer walls of the sealing sleeve.

[0009] Preferably, the valve seat and the valve cover are fixedly connected by a plurality of hexagonal bolts.

[0010] Preferably, a fourth sealing ring is fixedly connected between the valve seat and the assembly flange and the valve body, a plurality of communicating through holes are provided between the valve seat and the valve cover, connecting screws are inserted into the through holes, and a screw head is fixedly connected to the bottom of the connecting screw.

[0011] Preferably, the sealing surface is spray-welded Stellite alloy.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The ultra-short pneumatic plunger valve is assembled and connected between the valve body, the valve seat and the cylinder barrel, and an air inlet of the air source is arranged on the cylinder cover to push the valve body up and down to realize the conduction and closing of the conveying pipe. The limit sensing switch is directly installed on the valve cover and the cylinder cover. The limit sensing switch can sense the piston disk of the plunger and send the signal through the controller to realize the remote feedback of the opening and closing position of the valve. The valve seat is completely in contact with the equipment, and the plunger passes through the inner bottom of the equipment and is arranged flush. The gap between the plunger and the valve body is very small, which can reduce the dead zone of the aggregate. The ultra-short pneumatic plunger valve places the plunger directly in the cylinder without a bracket, so the valve can be set briefly. The limit switch is installed on the cylinder cover to sense the position of the plunger. The overall components are few, the valve is very short, and the assembly is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an ultra-short pneumatic plunger valve of the present invention; Figure 2 This is a schematic diagram of point A of an ultra-short pneumatic plunger valve of the present invention.

[0014] In the figure: 1. cylinder barrel; 2. valve body; 3. valve seat; 4. cylinder head; 5. valve cover; 6. plunger; 7. piston disc; 8. controller; 9. limit sensing switch; 10. delivery pipe; 11. connecting flange; 12. sealing surface; 13. fixing nut; 14. first positioning screw; 15. first sealing ring; 16. second sealing ring; 17. first guide ring; 18. second guide ring; 19. sealing sleeve; 20. third sealing ring; 21. hexagonal bolt; 22. screw head; 23. assembly flange; 24. fourth sealing ring; 25. connecting screw. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] See also Figure 1-2, an embodiment of the present invention: an ultra-short pneumatic plunger valve, comprising a cylinder 1, a valve body 2 and a valve seat 3, one end of the cylinder 1 is fixedly connected to a cylinder cover 4, one end of the valve body 2 is fixedly connected to a valve cover 5, the valve cover 5 is fixed to one end of the cylinder 1, the valve seat 3 is fixed to one end of the valve body 2, a plunger 6 is arranged in the valve body 2, one end of the plunger 6 extends into the cylinder 1, a piston disc 7 is fixedly connected to the end of the plunger 6 extending into the cylinder 1, a controller 8 is fixedly connected to the outer wall of the cylinder 1, two limit sensing switches 9 are connected to the controller 8, the two limit sensing switches 9 are electrically connected to the controller 8 through wires, one side of the valve body 2 is connected to a delivery pipe 10, one end of the delivery pipe 10 is fixedly connected to a connecting A connecting flange 11 is provided, a sealing surface 12 is provided on the top of the valve seat 3, and an assembly flange 23 is provided on the top of the valve seat 3. Specifically, the valve body 2 is assembled and connected with the valve seat 3 and the cylinder 1. An air inlet of an air source is provided on the cylinder cover 4 to push the plunger 6 in the valve body 2 to move up and down, so as to realize the conduction and closing of the delivery pipe 10. A limit sensing switch 9 is directly installed on the valve cover 5 and the cylinder cover 4. The limit sensing switch 9 can sense the piston disk 7 of the plunger 6, and send the signal through the controller 8 to realize the remote feedback of the opening and closing position of the valve. The valve seat 3 is completely in contact with the equipment, and the plunger 6 passes through the inner bottom of the equipment and is flush with it. The gap between the plunger 6 and the valve body 2 is very small, thereby reducing the dead zone of the aggregate.

[0019] In this embodiment, the cylinder barrel 1 is fixedly connected to the cylinder cover 4 through a plurality of first positioning screws 14, and a first sealing ring 15 is fixedly sleeved on the outer wall of the cylinder cover 4. The first sealing ring 15 abuts against the inner wall of the cylinder barrel 1, specifically, increasing the sealing effect between the cylinder cover 4 and the cylinder barrel 1; In this embodiment, the valve cover 5 and the cylinder cover 4 are both provided with screw holes, and the two limit sensing switches 9 are fixedly installed in the screw holes through fixing nuts 13 respectively.

[0020] In this embodiment, a second sealing ring 16 and a first guide ring 17 are fixedly sleeved on the piston disc 7 to increase the stability of the piston disc 7 during movement; In this embodiment, a second guide ring 18 is fixedly sleeved on the plunger 6, a sealing sleeve 19 is fixedly sleeved on one end of the plunger 6 close to the piston disc 7, and a third sealing ring 20 is fixedly sleeved on the inner and outer walls of the sealing sleeve 19. The plunger 6 is stably supported by the second guide ring 18, and the third sealing ring 20 increases the sealing effect between the plunger 6 and the valve body 2; In this embodiment, the valve seat 3 and the valve cover 5 are fixedly connected by a plurality of hexagonal bolts 21; In this embodiment, a fourth sealing ring 24 is fixedly connected between the valve seat 3 and the assembly flange 23 and the valve body 2. A plurality of communicating through holes are provided between the valve seat 3 and the valve cover 5. A connecting screw 25 is inserted into the through hole. A screw head 22 is fixedly connected to the bottom of the connecting screw 25 to facilitate assembly and fixation of the assembly flange 23. In this embodiment, the sealing surface 12 is spray-welded Stellite alloy, which has good wear resistance and avoids valve wear.

[0021] Working principle: First, assemble and connect the valve body 2 with the valve seat 3 and the cylinder 1. An air inlet for the air source is provided on the cylinder cover 4 to push the plunger 6 in the valve body 2 up and down to realize the conduction and closing of the delivery pipe 10. The limit sensing switch 9 is directly installed on the valve cover 5 and the cylinder cover 4. The limit sensing switch 9 can sense the piston disk 7 of the plunger 6, and send the signal through the controller 8 to realize remote feedback of the opening and closing position of the valve. The valve seat 3 is completely in contact with the equipment, and the plunger 6 passes through the inner bottom of the equipment and is flush with it. The gap between the plunger 6 and the valve body 2 is very small, thereby reducing the dead zone of the aggregate.

[0022] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An ultra-short pneumatic plunger valve, comprising a cylinder (1), a valve body (2) and a valve seat (3), characterized in that: A cylinder cover (4) is fixedly connected to one end of the cylinder barrel (1), a valve cover (5) is fixedly connected to one end of the valve body (2), the valve cover (5) is fixed to one end of the cylinder barrel (1), the valve seat (3) is fixed to one end of the valve body (2), a plunger (6) is provided in the valve body (2), one end of the plunger (6) extends into the cylinder barrel (1), a piston disc (7) is fixedly connected to the end of the plunger (6) extending into the cylinder barrel (1), a controller (8) is fixedly connected to the outer wall of the cylinder barrel (1), two limit sensing switches (9) are connected to the controller (8), and the two limit sensing switches (9) are electrically connected to the controller (8) through wires, one side of the valve body (2) is connected to a delivery pipe (10), one end of the delivery pipe (10) is fixedly connected to a connecting flange (11), a sealing surface (12) is provided on the top of the valve seat (3), and an assembly flange (23) is provided on the top of the valve seat (3).

2. The ultra-short pneumatic plunger valve according to claim 1, characterized in that: The cylinder barrel (1) is fixedly connected to the cylinder cover (4) via a plurality of first positioning screws (14); a first sealing ring (15) is fixedly sleeved on the outer wall of the cylinder cover (4); the first sealing ring (15) abuts against the inner wall of the cylinder barrel (1).

3. The ultra-short pneumatic plunger valve according to claim 1, characterized in that: The valve cover (5) and the cylinder cover (4) are both provided with screw holes, and the two limit sensing switches (9) are respectively fixedly mounted in the screw holes via fixing nuts (13).

4. The ultra-short pneumatic plunger valve according to claim 1, characterized in that: A second sealing ring (16) and a first guide ring (17) are fixedly sleeved on the piston disc (7).

5. The ultra-short pneumatic plunger valve according to claim 1, characterized in that: A second guide ring (18) is fixedly sleeved on the plunger (6), a sealing sleeve (19) is fixedly sleeved on one end of the plunger (6) close to the piston disc (7), and a third sealing ring (20) is fixedly sleeved on both the inner and outer walls of the sealing sleeve (19).

6. The ultra-short pneumatic plunger valve according to claim 1, characterized in that: The valve seat (3) and the valve cover (5) are fixedly connected via a plurality of hexagonal bolts (21).

7. The ultra-short pneumatic plunger valve according to claim 1, characterized in that: A fourth sealing ring (24) is fixedly connected between the valve seat (3) and the assembly flange (23) and the valve body (2); a plurality of communicating through holes are provided between the valve seat (3) and the valve cover (5); connecting screws (25) are inserted into the through holes; and a screw head (22) is fixedly connected to the bottom of the connecting screw (25).

8. The ultra-short pneumatic plunger valve according to claim 1, characterized in that: The sealing surface (12) is spray-welded Stellite alloy.

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