Ball valve with non-return function

Abstract

The utility model provides a ball valve with a non-return function. The ball valve with the non-return function comprises a valve body, flange connecting pipes are fixedly connected to the two ends of the valve body, a ball groove is formed in the valve body, a round ball valve is rotationally installed in the ball groove, and a non-return mechanism is arranged in the round ball valve; the non-return mechanism comprises a second flow hole, the second flow hole is formed in the round ball valve, a fixed rod is fixedly installed in the second flow hole, a movable rod penetrates through the fixed rod in a sliding mode, and a push plate is fixedly installed at one end of the movable rod. According to the ball valve with the non-return function, the non-return mechanism is arranged, so that when fluid in the valve body stops being supplied continuously, flowing thrust generated by the fluid is smaller than the elastic force of the spring, the spring releases the elastic force to abut against the push plate to move, and then the push plate drives the sealing plug to move into the sealing ring through the movable rod to conduct blocking and sealing; and fluid backflow is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of ball valve, especially a ball valve with non-return function. BACKGROUND

[0002] Ball valve is a commonly used control fluid valve, it can realize fluid switch, adjustment or block by rotating the ball in the valve body, and is widely used in petroleum refining, long-distance pipeline, chemical industry, papermaking, pharmaceutical, water conservancy, electric power, municipal administration, steel and other industries, and occupies an important position in the national economy.

[0003] Ball valve does not have non-return function in the use process, so that after the fluid is instantaneously cut off, the fluid appears backflow phenomenon, the backflow can cause the internal pressure of the pipeline to change suddenly, overload and damage the pipeline and related equipment, thereby reducing the stability of the whole fluid conveying system, therefore, in addition to installing the ball valve on the pipeline, a check valve is also installed for cutting off the fluid backflow, but installing two valves not only is complicated in installation operation, but also increases the valve use cost.

[0004] Therefore, it is necessary to provide a new ball valve with non-return function to solve the above technical problems. CONTENT OF THE UTILITY MODEL

[0005] The utility model solves the technical problem to provide a ball valve with non-return function which can automatically cut off the fluid backflow when the fluid backflows in the ball valve.

[0006] To solve the above technical problem, the ball valve with non-return function provided by the utility model comprises a valve body, flange connecting pipes are fixedly connected to both ends of the valve body, a ball groove is formed in the valve body, a circular ball valve is rotatably installed in the ball groove, and a non-return mechanism is arranged in the circular ball valve.

[0007] The non-return mechanism comprises a second flow hole, the second flow hole is formed in the circular ball valve, a fixed rod is fixedly installed in the second flow hole, an active rod is slidably penetrated through the fixed rod, a push plate is fixedly installed at one end of the active rod, a spring is slidably sleeved on the active rod, both ends of the spring are respectively abutted on the fixed rod and the push plate, a third flow hole is formed in the circular ball valve, the third flow hole is communicated with the second flow hole, a baffle is fixedly installed in the third flow hole, a through hole is formed in the baffle, a sealing ring is fixedly installed on the baffle, and a sealing plug is fixedly connected to one end of the active rod and penetrated through the through hole.

[0008] As a further scheme of the utility model, the valve body is provided with a sealing seat, a plurality of fixed bolts are threadedly installed on the sealing seat, the fixed bolts are distributed around the sealing seat, a valve rod is rotatably installed on the sealing seat, one end of the valve rod extends out of the sealing seat and is fixedly installed with a handle, a limiting rod is fixedly connected to the bottom end of the valve rod, a limiting hole is formed in the top of the ball groove, and the limiting rod is matched with the limiting hole.

[0009] As a further scheme of the utility model, the valve body is provided with a sealing seat, a plurality of fixed bolts are threadedly installed on the sealing seat, the fixed bolts are distributed around the sealing seat, a valve rod is rotatably installed on the sealing seat, one end of the valve rod extends out of the sealing seat and is fixedly installed with a handle, a limiting rod is fixedly connected to the bottom end of the valve rod, a limiting hole is formed in the top of the ball groove, and the limiting rod is matched with the limiting hole.

[0010] As a further scheme of the utility model, the push plate is provided with an inner groove, and the inner groove is opposite to the fluid flow direction.

[0011] As a further scheme of the utility model, a round rod is fixedly installed on the push plate, the round rod is slidably penetrated through the fixed rod and is fixedly connected with the sealing plug.

[0012] As a further scheme of the utility model, an inner chamfer surface is formed in the inner wall of the sealing ring, and the protruding end of the sealing plug is matched with the inner chamfer surface.

[0013] Compared with the related art, the ball valve with the anti-return function has the following beneficial effects:

[0014] The ball valve with the anti-return function has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to facilitate the understanding of those skilled in the art, the utility model is further described below with reference to the drawings.

[0016] Figure 1 The utility model provides the ball valve with the anti-return function of the three-dimensional structure schematic diagram;

[0017] Figure 2 The utility model provides the ball valve with the anti-return function of the valve body and the round type ball valve structure schematic diagram;

[0018] Figure 3 The utility model provides the ball valve with the anti-return function of the valve body split structure schematic diagram;

[0019] Figure 4 The utility model provides the ball valve with the anti-return function of the round type ball valve cut structure schematic diagram.

[0020] In the diagram: 1. Valve body; 101. Flange connecting pipe; 2. Sealing seat; 201. Fixing bolt; 202. Valve stem; 203. Handle; 204. Limiting rod; 3. Ball groove; 301. Round ball valve; 302. First flow hole; 303. Valve seat sealing ring; 4. Second flow hole; 401. Fixed rod; 402. Moving rod; 403. Push plate; 404. Spring; 5. Third flow hole; 501. Baffle; 502. Sealing ring; 503. Sealing plug; 6. Round rod. Detailed Implementation

[0021] Please refer to the following: Figures 1 to 4 ,in, Figure 1 This is a three-dimensional structural diagram of the ball valve with anti-reverse function according to this utility model; Figure 2 A schematic diagram of the valve body and circular ball valve structure of the ball valve with anti-reverse function provided by this utility model; Figure 3 A schematic diagram of the valve body disassembled for the ball valve with anti-reverse function provided by this utility model; Figure 4 This is a cross-sectional view of a circular ball valve with a backflow prevention function provided by this utility model. The ball valve with a backflow prevention function includes: a valve body 1, with flange connecting pipes 101 fixedly connected to both ends of the valve body 1, a ball groove 3 opened inside the valve body 1, a circular ball valve 301 rotatably installed in the ball groove 3, and a backflow prevention mechanism provided inside the circular ball valve 301;

[0022] The anti-reverse mechanism includes a second flow hole 4, which is located inside a circular ball valve 301. A fixed rod 401 is fixedly installed inside the second flow hole 4. A movable rod 402 slides through the fixed rod 401. A push plate 403 is fixedly installed at one end of the movable rod 402. A spring 404 is slidably sleeved on the movable rod 402. The two ends of the spring 404 abut against the fixed rod 401 and the push plate 403, respectively. A third flow hole 5 is located inside the circular ball valve 301 and communicates with the second flow hole 4. A baffle 501 is fixedly installed inside the third flow hole 5. A through hole is located inside the baffle 501. A sealing ring 502 is fixedly installed on the baffle 501. One end of the movable rod 402 passes through the through hole and is fixedly connected to a sealing plug 503.

[0023] like Figure 1 and Figure 2As shown, a sealing seat 2 is provided on the valve body 1, and a plurality of fixing bolts 201 are threadedly installed on the sealing seat 2. The plurality of fixing bolts 201 are distributed around the sealing seat 2. A valve stem 202 is rotatably installed on the sealing seat 2. One end of the valve stem 202 extends outside the sealing seat 2 and is fixedly installed with a handle 203. A limit rod 204 is fixedly connected to the bottom end of the valve stem 202. A limit hole is opened at the top of the ball groove 3, and the limit rod 204 is adapted to the limit hole.

[0024] By rotating the handle 203, the valve stem 202 can be rotated, and then the valve stem 202 drives the limit rod 204 to rotate synchronously. The limit rod 204 controls the rotation of the round ball valve 301 to open and close, facilitating fluid flow and quick valve closure.

[0025] like Figure 3 As shown, the valve body 1 has first flow holes 302 on both sides, the first flow holes 302 communicate with the ball groove 3, and a valve seat sealing ring 303 is fixedly installed in the first flow holes 302. One side of the valve seat sealing ring 303 abuts against the round ball valve 301.

[0026] By incorporating a valve seat sealing ring 303, the sealing effect on both sides of the round ball valve 301 can be improved, preventing liquid leakage.

[0027] like Figure 4 As shown, the pusher plate 403 has an inner groove on its surface, and the inner groove is opposite to the fluid flow direction;

[0028] The inner groove on the surface of the pusher plate 403 is opposite to the direction of fluid flow, so the thrust generated on the pusher plate 403 during fluid flow can be enhanced.

[0029] like Figure 4 As shown, a round rod 6 is fixedly installed on the push plate 403, and the round rod 6 slides through the fixed rod 401 and is fixedly connected to the sealing plug 503;

[0030] By providing the circular rod 6, the push plate 403 can move the movable rod 402 in parallel, which can simultaneously drive the circular rod 6 to move, thereby preventing the movable rod 402 from rotating and providing stability for the movement of the movable rod 402.

[0031] like Figure 4 As shown, the inner wall of the sealing ring 502 has an inner chamfered surface, and the protruding end of the sealing plug 503 fits into the inner chamfered surface;

[0032] The inner chamfered surface on the inner wall of the sealing ring 502 allows the protruding end of the sealing plug 503 to fit easily onto the inner chamfered surface, thereby improving the sealing performance between the sealing ring 502 and the sealing plug 503.

[0033] The working principle of the ball valve with anti-reverse function provided by this utility model is as follows:

[0034] First step: When in use, it is connected to the fluid delivery pipeline through the flange connection pipe 101. Then, during the fluid flow, the flow thrust generated by the fluid is greater than the elastic force of the spring 404. Therefore, the fluid will push the push plate 403 to move. Then, the push plate 403 can drive the movable rod 402 to slide parallel on the fixed rod 401 and push the sealing plug 503 off the sealing ring 502. Then, the fluid flows out from the through hole on the baffle 501, so that the fluid flows normally.

[0035] The second step: When the fluid supply is cut off, the thrust generated by the fluid will be less than the elastic force of the spring 404. As a result, the spring 404 will return to its original state after being compressed, and release the elastic force to push the push plate 403 to move. Then, the push plate 403 will drive the movable rod 402 to return to its original position and slide, and re-insert the sealing plug 503 into the sealing ring 502 to seal, thereby preventing fluid backflow and realizing the fluid anti-reverse function.

[0036] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0037] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments, or they can be used directly or indirectly, without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the appended claims and their equivalents, and they are similarly included within the patent protection scope of the present invention.

Claims

1. A ball valve with a check valve function, characterized in that, include: The valve body has flange connecting pipes fixedly connected to both ends. A ball groove is opened in the valve body, and a round ball valve is rotatably installed in the ball groove. A check valve mechanism is provided in the round ball valve. The anti-reverse mechanism includes a second flow orifice, which is located inside a circular ball valve. A fixed rod is fixedly installed inside the second flow orifice, and a movable rod slides through the fixed rod. A push plate is fixedly installed at one end of the movable rod, and a spring is slidably sleeved on the movable rod. The two ends of the spring abut against the fixed rod and the push plate, respectively. A third flow orifice is located inside the circular ball valve and communicates with the second flow orifice. A baffle is fixedly installed inside the third flow orifice, and a through hole is located inside the baffle. A sealing ring is fixedly installed on the baffle, and one end of the movable rod passes through the through hole and is fixedly connected to a sealing plug. The valve body is provided with a sealing seat, and multiple fixing bolts are threaded on the sealing seat. The multiple fixing bolts are distributed around the sealing seat. A valve stem is rotatably installed on the sealing seat. One end of the valve stem extends outside the sealing seat and is fixedly installed with a handle. A limit rod is fixedly connected to the bottom end of the valve stem. A limit hole is opened at the top of the ball groove. The limit rod is adapted to the limit hole. The valve body has first flow holes on both sides, the first flow holes are connected to the ball groove, and a valve seat sealing ring is fixedly installed in the first flow hole. One side of the valve seat sealing ring abuts against the round ball valve. The inner wall of the sealing ring has an inner chamfered surface, and the protruding end of the sealing plug matches the inner chamfered surface.

2. The ball valve with a check valve function according to claim 1, characterized in that: The push plate has an inner groove on its surface, and the inner groove is opposite to the direction of fluid flow.

3. The ball valve with check valve function according to claim 1, characterized in that: A round rod is fixedly installed on the push plate, and the round rod slides through the fixed rod and is fixedly connected to the sealing plug.

Images