High-performance sealing butterfly valve structure

Abstract

The utility model relates to the technical field of butterfly valves, and discloses a high-performance sealing butterfly valve structure which comprises a valve pipe, flange plates, a valve plate, a connecting arm and a valve rod, the flange plates are connected to the two sides of the outer portion of the valve pipe in a sleeved mode, the valve plate is rotationally arranged in the valve pipe, the valve rod is inserted in the valve plate, and the connecting arm is assembled at the top of the valve rod. Second chucks are embedded in the two ends of the interior of the valve pipe correspondingly, a locking mechanism is inserted into the valve rod and comprises a vertical arm, connecting arms are evenly distributed on the outer portion of the vertical arm, and the connecting arms are connected with the vertical arm through hinges. According to the high-performance sealing butterfly valve structure, uneven abrasion of a valve plate and a sealing seat in a traditional butterfly valve is avoided, long-term use can cause increase of valve torque, serious abrasion and reduction of the service life of the valve, rotation is smooth, any retardation phenomenon is avoided, the torque reaches the minimum, the width of an effective sealing face is large, and the service life of the valve is prolonged. Therefore, the sealing effect of the valve plate is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, and particularly relates to a high-performance sealed butterfly valve structure. Background Technique

[0002] A butterfly valve, also known as a flap valve or a butterfly shutter, is a simple-structured regulating valve. By operating a transmission device to rotate a valve stem, and at the same time the valve stem drives a butterfly plate to rotate to achieve opening and closing. The opening and closing member of the butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening and closing or regulating. The butterfly valve mainly functions as a cut-off and throttling in a pipeline, and can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media.

[0003] The existing sealing surface of the butterfly valve is composed of a cylindrical surface and a plane, forming a sealing pair with a sealing seat. After generating a sealing specific pressure, the stress directions at the plane and the circular surface of the valve plate are inconsistent, resulting in uneven wear between the valve plate and the sealing seat. After long-term use, it will cause an increase in the valve torque, serious wear, and a reduction in the service life of the valve. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides a high-performance sealed butterfly valve structure to solve the technical problems that the wear between the valve plate and the sealing seat is uneven, and after long-term use, it will cause an increase in the valve torque, serious wear, and a reduction in the service life of the valve.

[0006] (2) Technical Solutions

[0007] To achieve the above purpose, the utility model provides the following technical solution: a high-performance sealed butterfly valve structure, comprising: a valve pipe, a flange, a valve plate, a connecting arm, and a valve stem. The flange is sleeved on both outer sides of the valve pipe. The valve plate is rotatably arranged inside the valve pipe. The valve stem is inserted into the valve plate. The connecting arm is assembled on the top of the valve stem. Second chucks are embedded at both ends inside the valve pipe.

[0008] A locking mechanism is inserted into the valve stem. The locking mechanism includes a vertical arm. Connecting arms are evenly distributed on the outer side of the vertical arm, and the connecting arms are connected to the vertical arm through hinges. A clamping arm is connected to the outer side of the connecting arm through a hinge. A first return plate is sleeved on the outer side of the vertical arm. First springs are evenly distributed at the bottom of the first return plate. The bottom of the first spring is assembled with a second return plate, and the second return plate is connected to the valve stem.

[0009] Preferably, a rotating arm is connected inside the connecting arm through a pin shaft, and a spring is connected between the rotating arm and the connecting arm. The left side of the rotating arm is connected to the vertical arm through a connecting rope. The rotating arm can be inserted into the inside of the first chuck, thereby restricting the overall position of the connecting arm. When the rotating arm moves, it can drive the vertical arm to move by means of the connecting rope and squeezing the vertical arm.

[0010] Preferably, a first chuck is embedded at the top of the valve pipe, and the first chuck is adapted to the rotating arm. The first chuck can restrict the positions of the rotating arm and the connecting arm through an external notch.

[0011] Preferably, a plurality of card slots are uniformly arranged inside the second chuck, and the card slots are adapted to the card arms. The card slots can be inserted by the card arms to restrict the position of the locking mechanism.

[0012] Preferably, the outside of the valve stem is connected to the valve pipe through a sealed bearing. A plurality of hole slots adapted to the card arms are uniformly arranged on the outside of the valve stem. The sealed bearing can support the valve stem.

[0013] Preferably, the front cut surface of the valve plate is a complete spherical surface, the inner wall of the valve pipe is a complete spherical surface, and an interference fit is formed between the valve plate and the valve pipe to form a sealing specific pressure. Through the cooperation of the valve plate and the valve pipe, the service strength of the valve plate is improved.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the present utility model provides a high-performance sealed butterfly valve structure, which has the following beneficial effects:

[0016] 1. For this high-performance sealed butterfly valve structure, the sealing surface of the valve plate is a complete spherical surface, and the sealing pair on the inner wall of the valve pipe is an integral spherical surface. An interference fit is carried out through the flange and the valve pipe to form a sealing specific pressure, so as to achieve the sealing purpose, avoiding uneven wear between the valve plate and the sealing seat inside the traditional butterfly valve. After long-term use, it will cause an increase in the valve torque and serious wear, reducing the service life of the valve;

[0017] 2. For this high-performance sealed butterfly valve structure, the sealing pair of the valve pipe valve is an integral spherical shape, and the direction of the formed sealing specific pressure is a centripetal state. When the valve plate rotates, the distances from each point on the sealing pair to the center shaft hole point of the valve plate are the same, that is, the acting forces are the same, the rotation is smooth, without any blocking phenomenon, making the torque reach the minimum, and the width of the effective sealing surface is relatively large, thereby greatly improving the sealing effect of the valve plate;

[0018] 3. For this high-performance sealed butterfly valve structure, after the position of the valve plate is adjusted, through the cooperation of the additionally provided second chuck and the locking mechanism, the positions of the valve stem and the valve plate are automatically self-locked, greatly improving the service strength of the valve stem, and avoiding the valve stem being driven by water pressure or air pressure, resulting in unstable sealing and thus gas or liquid leakage. Brief Description of the Drawings

[0019] Figure 1 This is a front view schematic diagram of the present utility model;

[0020] Figure 2 This is a front view schematic diagram of the valve plate of the present utility model;

[0021] Figure 3 This is a front cross-sectional view of the locking mechanism of the present utility model;

[0022] Figure 4 This is an internal schematic diagram of the second chuck of the present utility model.

[0023] In the figure: 1, valve pipe; 2, flange; 3, valve plate; 4, connecting arm; 41, rotating arm; 42, first chuck; 5, valve stem; 6, second chuck; 7, locking mechanism; 71, vertical arm; 72, connecting arm; 73, clamping arm; 74, first return plate; 75, first spring; 76, second return plate. Detailed Description of the Preferred Embodiment

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] The present utility model provides a technical solution. Please refer to Figure 1 and Figure 2 , a high-performance sealed butterfly valve structure, including: valve pipe 1, flange 2, valve plate 3, connecting arm 4 and valve stem 5. Among them, the valve pipe 1, valve plate 3, connecting arm 4 and valve stem 5 are combined to form a complete butterfly valve. The flange 2 is sleeved on both outer sides of the valve pipe 1. The valve plate 3 is rotatably arranged inside the valve pipe 1. The valve stem 5 is inserted into the inside of the valve plate 3. The connecting arm 4 is assembled on the top of the valve stem 5. Second chucks 6 are embedded at both ends inside the valve pipe 1.

[0026] Please refer to Figure 3 and Figure 4 , a locking mechanism 7 is inserted into the inside of the valve stem 5. The locking mechanism 7 includes a vertical arm 71. The vertical arm 71 can move up and down inside the valve stem 5. Connecting arms 72 are evenly distributed outside the vertical arm 71. The connecting arms 72 can drive the clamping arms 73 to move. And the connecting arms 72 are connected to the vertical arm 71 through hinges. A clamping arm 73 is connected to the outside of the connecting arms 72 through a hinge. A first return plate 74 is sleeved outside the vertical arm 71. The clamping arm 73 and the first return plate 74 cooperate to insert into the inside of the second chuck 6 to limit the position of the valve stem 5.

[0027] At the bottom of the first return plate 74, first springs 75 are evenly distributed. At the bottom of the first springs 75, a second return plate 76 is assembled. The cooperation of the first return plate 74, the first springs 75, and the second return plate 76 enables the vertical arm 71 to return after movement. The second return plate 76 is connected to the valve stem 5. Inside the connecting arm 4, a rotating arm 41 is connected by a pin shaft, and a spring is connected between the rotating arm 41 and the connecting arm 4. The left side of the rotating arm 41 is connected to the vertical arm 71 by a connecting rope. The rotating arm 41 can be inserted into the inside of the first chuck 42, thereby restricting the overall position of the connecting arm 4.

[0028] When the rotating arm 41 moves, it can drive the vertical arm 71 to move by means of the connecting rope and extruding the vertical arm 71. At the top of the valve pipe 1, a first chuck 42 is embedded. The first chuck 42 is adapted to the rotating arm 41. The first chuck 42 can restrict the positions of the rotating arm 41 and the connecting arm 4 through external notches. Inside the second chuck 6, clamping grooves are evenly distributed, and the clamping grooves are adapted to the clamping arms 73.

[0029] The clamping grooves can be inserted by the clamping arms 73 to restrict the position of the locking mechanism 7. The outside of the valve stem 5 is connected to the valve pipe 1 through a sealing bearing. On the outside of the valve stem 5, hole grooves adapted to the clamping arms 73 are evenly distributed. The sealing bearing can support the valve stem 5. The front cut surface of the valve plate 3 is a complete spherical surface, and the inner wall of the valve pipe 1 is a complete spherical surface. An interference fit is formed between the valve plate 3 and the valve pipe 1 to form a sealing specific pressure. Through the cooperation of the valve plate 3 and the valve pipe 1, the service strength of the valve plate 3 is improved.

[0030] In this solution, the sealing surface of the valve plate 3 is a complete spherical surface, and the sealing pair on the inner wall of the valve pipe 1 is an integral spherical surface. An interference fit is carried out between the valve plate 3 and the valve pipe 1 to form a sealing specific pressure, so as to achieve the sealing purpose, avoiding uneven wear between the valve plate 3 and the sealing seat inside the traditional butterfly valve. After long-term use, it will cause an increase in the valve torque and serious wear, reducing the service life of the valve;

[0031] The sealing pair of the valve pipe 1 is an integral sphere, and the direction of the formed sealing specific pressure is in a centripetal state. When the valve plate 3 rotates, the distances from each point on the sealing pair to the center shaft hole point of the valve plate 3 are the same, that is, the acting forces are the same, the rotation is smooth, without any blocking phenomenon, making the torque reach the minimum, and the width of the effective sealing surface is relatively large, thereby greatly improving the sealing effect of the valve plate 3;

[0032] When it is necessary to drive the valve plate 3 to move, hold the connecting arm 4 to drive the rotating arm 41 to rotate with the fingers. Subsequently, the left side of the rotating arm 41 disengages from the inside of the first chuck 42. At this time, the valve stem 5 can be driven to rotate through the connecting arm 4, and then the valve plate 3 is driven to rotate. After the adjustment is completed, the rotating arm 41 returns to its original position through the spring. The returning rotating arm 41 drives the vertical arm 71 to descend, and then drives the connecting arm 72 to transmit, driving the clamping arm 73 to insert into the inside of the second chuck 6 to lock both ends of the valve stem 5, thereby improving the stability of the valve stem 5 during use and preventing the valve stem 5 from being driven by water pressure or air pressure, resulting in unstable sealing and causing gas or liquid leakage.

[0033] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-performance sealed butterfly valve structure, comprising: A valve pipe (1), a flange (2), a valve plate (3), a connecting arm (4) and a valve rod (5). The flange (2) is sleeved on both outer sides of the valve pipe (1). The valve plate (3) is rotatably arranged inside the valve pipe (1). The valve rod (5) is inserted into the valve plate (3). The connecting arm (4) is assembled on the top of the valve rod (5). It is characterized in that: second chucks (6) are embedded at both ends inside the valve pipe (1); A locking mechanism (7) is inserted into the valve rod (5). The locking mechanism (7) includes a vertical arm (71). Connecting arms (72) are evenly distributed on the outside of the vertical arm (71), and the connecting arms (72) are connected to the vertical arm (71) through hinges. A clamping arm (73) is connected to the outside of the connecting arm (72) through a hinge. A first return plate (74) is sleeved on the outside of the vertical arm (71). First springs (75) are evenly distributed at the bottom of the first return plate (74). A second return plate (76) is assembled at the bottom of the first spring (75). The second return plate (76) is connected to the valve rod (5).

2. The structure of a high-performance sealed butterfly valve according to claim 1, wherein: A rotating arm (41) is connected to the inside of the connecting arm (4) through a pin shaft, and a spring is connected between the rotating arm (41) and the connecting arm (4). The left side of the rotating arm (41) is connected to the vertical arm (71) through a connecting rope.

3. A high-performance sealed butterfly valve structure according to claim 2, characterized in that: A first chuck (42) is embedded at the top of the valve pipe (1), and the first chuck (42) is adapted to the rotating arm (41).

4. A high-performance sealed butterfly valve structure according to claim 1, characterized in that: Slots are evenly distributed inside the second chuck (6), and the slots are adapted to the clamping arms (73).

5. A high-performance sealed butterfly valve structure according to claim 1, characterized in that: The outside of the valve rod (5) is connected to the valve pipe (1) through a sealing bearing. Hole grooves adapted to the clamping arms (73) are evenly distributed on the outside of the valve rod (5).

6. The structure of a high-performance sealed butterfly valve according to claim 1, characterized in that: The front section of the valve plate (3) is a complete spherical surface. The inner wall of the valve pipe (1) is a complete spherical surface. An interference fit is formed between the valve plate (3) and the valve pipe (1) to form a sealing specific pressure.

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