Ultra-short pneumatic plunger valve

Abstract

The utility model 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 at one end of the cylinder barrel, the valve seat is fixed at 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 utility model relates to the field of valve related products, concretely to a super short pneumatic plunger valve. BACKGROUND

[0002] ‌Pneumatic plunger valve is a commonly used control element, widely used in industrial automation control system, plunger valve controls the flow of fluid through the movement of plunger or piston, its working principle is based on the lifting of plunger to open or close the valve. This valve equipment is usually used in chemical industry, petroleum, pharmaceutical, food processing, water treatment and other fields. With the progress of technology, the design and function of plunger valve are constantly improving to meet the needs of modern industry for accurate control of flow, pneumatic plunger valve generally has three parts, valve body assembly + support + pneumatic actuator. Pneumatic actuator is powered by 0.4-0.6Mpa compressed air to realize the opening and closing of plunger valve;

[0003] But the current existing conventional structure's pneumatic plunger valve is too long, can't satisfy the use requirement of narrow space, and the valve sealing wears seriously, short service life, unstable operation, and the structure is complicated, many components, the connection is complex, processing and assembly are difficult, the cost is higher, has the defect. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of super short pneumatic plunger valve to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of super short pneumatic plunger valve, including cylinder, valve body and valve seat, one end of the cylinder is fixedly connected with cylinder cover, one end of the valve body is fixedly connected with valve cover, the valve cover is fixed in one end of cylinder, the valve seat is fixed in one end of valve body, the valve body is equipped with plunger, one end of the plunger extends into cylinder, the plunger is fixedly connected with piston disc on one end extending into cylinder, controller is fixedly connected on the outer side wall of the cylinder, two limit inductive switches are connected on the controller, two limit inductive switches are electrically connected with controller by wire, the side of the valve body is communicated with delivery pipe, one end of the delivery pipe is fixedly connected with connecting flange, the top of the valve seat is equipped with sealing surface, the top of the valve seat is equipped with assembly flange.

[0006] Preferably, the cylinder is fixedly connected between the plurality of first positioning screw rods and the cylinder cover, a first sealing ring is fixedly sleeved on the outer side wall of the cylinder cover, and the first sealing ring abuts against the inner wall of the cylinder.

[0007] Preferably, screw holes are arranged on the valve cover and the cylinder cover, and the two limit inductive switches are fixedly installed in the screw holes by fixed nuts.

[0008] Preferably, the piston disc is fixedly sleeved with a second sealing ring and a first guide ring.

[0009] Preferably, the plunger is fixedly sleeved with a second guide ring, and 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 the inner side wall and the outer side wall of the sealing sleeve.

[0010] Preferably, the valve seat and the valve cover are fixedly connected through a plurality of hexagonal bolts.

[0011] Preferably, the valve seat and the assembled flange and the valve body are fixedly connected with fourth sealing rings, a plurality of through holes in communication are arranged between the valve seat and the valve cover, a connecting screw rod is inserted in the through hole, and a screw head is fixedly connected to the bottom of the connecting screw rod.

[0012] Preferably, the sealing surface is a spray-welded stellite alloy.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The super-short pneumatic plunger valve, through assembling and connecting the valve body with the valve seat and the cylinder, arranging the air inlet of the air source on the cylinder cover, pushing the up-down movement in the valve body, realizing the conduction and closing of the conveying pipe, directly installing the limit sensing switch on the valve cover and the cylinder cover, the limit sensing switch can sense the piston disc of the plunger, and the signal is sent through the controller to realize the remote feedback of the opening and closing position of the valve, the valve seat is completely attached to the equipment, the plunger penetrates the inner bottom of the equipment and is flushly arranged, the gap between the plunger and the valve body is small, and thus the dead zone of the aggregate can be reduced.

[0015] The super-short pneumatic plunger valve, through assembling and connecting the valve body with the valve seat and the cylinder, arranging the air inlet of the air source on the cylinder cover, pushing the up-down movement in the valve body, realizing the conduction and closing of the conveying pipe, directly installing the limit sensing switch on the valve cover and the cylinder cover, the limit sensing switch can sense the piston disc of the plunger, and the signal is sent through the controller to realize the remote feedback of the opening and closing position of the valve, the valve seat is completely attached to the equipment, the plunger penetrates the inner bottom of the equipment and is flushly arranged, the gap between the plunger and the valve body is small, and thus the dead zone of the aggregate can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a structure schematic view of the super-short pneumatic plunger valve of the utility model.

[0017] Fig. 2 It is a schematic view of A of the super-short pneumatic plunger valve of the utility model.

[0018] In the figure: 1, cylinder; 2, valve body; 3, valve seat; 4, cylinder cover; 5, valve cover; 6, plunger; 7, piston disc; 8, controller; 9, limit inductive 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, assembling flange; 24, fourth sealing ring; 25, connecting screw. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0020] In the description of the utility model, it should be explained that the directions or position relations indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like are the directions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and are not indicative or suggestive of the devices or elements indicated must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicative or suggestive of relative importance.

[0021] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] Please refer to Figs. 1-2The utility model provides an embodiment: a kind of ultra-short pneumatic plunger valve, including cylinder 1, valve body 2 and valve seat 3, one end of cylinder 1 is fixedly connected with cylinder cover 4, one end of valve body 2 is fixedly connected with valve cover 5, valve cover 5 is fixed in one end of cylinder 1, valve seat 3 is fixed in one end of valve body 2, plunger 6 is equipped in valve body 2, one end of plunger 6 extends into cylinder 1, plunger 6 is fixedly connected with piston disc 7 on the end extending into cylinder 1, controller 8 is fixedly connected on the outer lateral wall of cylinder 1, two limit sensing switches 9 are connected on the upper of controller 8, two limit sensing switches 9 are electrically connected with controller 8 by wire, conveying pipe 10 is communicated on the side of valve body 2, one end of conveying pipe 10 is fixedly connected with connecting flange 11, the top of valve seat 3 is equipped with sealing surface 12, the top of valve seat 3 is equipped with assembling flange 23, specifically, valve body 2 and valve seat 3 and cylinder 1 are assembled and connected, the air inlet of gas source is provided on cylinder cover 4, plunger 6 in valve body 2 is moved up and down, realizes the conduction and the closing of conveying pipe 10, limit sensing switch 9 is directly installed on valve cover 5 and cylinder cover 4, limit sensing switch 9 can sense the piston disc 7 of plunger 6, and signal is sent through controller 8 to realize the opening and closing position of remote feedback valve, valve seat 3 is completely pasted with equipment, and plunger 6 penetrates the inner bottom of equipment and is flushly arranged, the gap between plunger 6 and valve body 2 is very small, to reduce the dead zone of aggregate.

[0023] In the embodiment, the cylinder 1 is fixedly connected between the plurality of first positioning screws 14 and the cylinder cover 4, and the first sealing ring 15 is fixedly sleeved on the outer lateral wall of the cylinder cover 4 and abuts against the inner wall of the cylinder 1.

[0024] In the embodiment, the valve cover 5 and the cylinder cover 4 are each provided with a threaded hole, and the two limit sensing switches 9 are fixedly installed in the threaded holes through the fixing nuts 13.

[0025] In the embodiment, the piston disc 7 is fixedly sleeved with the second sealing ring 16 and the first guide ring 17, so as to increase the stability of the piston disc 7 during movement.

[0026] In the embodiment, the piston disc 7 is fixedly sleeved with the second guide ring 18, the sealing sleeve 19 is fixedly sleeved on the end of the plunger 6 close to the piston disc 7, the third sealing ring 20 is fixedly sleeved on the inner lateral wall and the outer lateral wall of the sealing sleeve 19, the plunger 6 is stably supported through the second guide ring 18, and the third sealing ring 20 increases the sealing effect between the plunger 6 and the valve body 2.

[0027] In the embodiment, the valve seat 3 and the valve cover 5 are fixedly connected through the plurality of hexagonal bolts 21.

[0028] In the embodiment, the fourth sealing ring 24 is fixedly connected between the valve seat 3, the assembling flange 23 and the valve body 2, a plurality of through holes in communication are arranged between the valve seat 3 and the valve cover 5, the connecting screw 25 is arranged in the through hole, the screw head 22 is fixedly connected to the bottom of the connecting screw 25, and the assembling flange 23 is assembled and fixed.

[0029] In the embodiment, the sealing surface 12 is spray-welded with Stellite alloy, has good wear resistance, and avoids valve wear.

[0030] Working principle: firstly, the valve body 2 is assembled and connected with the valve seat 3 and the cylinder barrel 1, the air inlet of the air source is arranged on the cylinder cover 4, the plunger 6 in the valve body 2 is pushed to move up and down, the conduction and closing of the conveying pipe 10 are realized, the limit inductive switch 9 is directly installed on the cylinder cover 4 and the cylinder cover 4, the limit inductive switch 9 can induct the piston disc 7 of the plunger 6, and the signal is sent through the controller 8 to realize remote feedback of the opening and closing positions of the valve, the valve seat 3 is completely attached to the equipment, the plunger 6 penetrates the inner bottom of the equipment and is arranged in a flush manner, the gap between the plunger 6 and the valve body 2 is small, and the dead zone of the aggregate can be reduced.

[0031] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

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

2. An ultra-short pneumatic spool valve according to claim 1, characterized in that: The cylinder (1) is fixedly connected between the cylinder cover (4) and the cylinder cover (4) through a plurality of first positioning screws (14), and the first sealing ring (15) is fixedly sleeved on the outer side wall of the cylinder cover (4).

3. An ultra-short pneumatic piston 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 inductive switches (9) are fixedly installed in the screw holes through fixing nuts (13).

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

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

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

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

8. An ultra-short pneumatic piston valve according to claim 1, characterized in that: The sealing surface (12) is a spray welding stellite alloy.

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