Low-torque electric flange ball valve capable of being opened and closed quickly

Abstract

The utility model discloses a low-torque rapid opening and closing electric flange ball valve which comprises a valve body, a flow channel is formed in the valve body, a valve element is arranged on the flow channel, valve seats are arranged on the left side and the right side of the valve element, sealing rings are arranged on the two valve seats, compression springs are arranged at the side ends of the two valve seats, supports are arranged on the upper side and the lower side of the valve element, and first annular grooves are formed in the two spherical surfaces. Second annular grooves are formed in the upper face and the lower face of the valve element, balls are installed between the first annular grooves and the second annular grooves, a cylindrical block is arranged at the bottom end of the valve element, a round hole is formed in the bottom end of the flow channel, a valve rod is arranged on the valve body, a round concave hole is formed in the valve body, and a round block is arranged on the valve rod. A mounting seat is arranged on the valve body, a speed reducer is arranged in the mounting seat, a motor is mounted on an input shaft of the speed reducer, and an output shaft of the speed reducer is fixed with the valve rod. Abrasion of the sealing ring at the outlet end can be greatly reduced, the valve element is driven to rotate through low torque, and the valve is convenient to install, free of worry in maintenance and worthy of application and popularization.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a low-torque, fast-opening and closing electric flange ball valve. Background Technology

[0002] A ball valve is a valve in which the opening and closing element (ball) is driven by the valve stem and rotates around the valve axis. However, in high-pressure media conditions, current ball valves can become very difficult to open or close. This is because the high-pressure medium impacts the valve core laterally, causing the valve core to be pressed tightly against the sealing ring at the outlet end. This results in extremely high frictional resistance when the valve core rotates, making it difficult to open and close the ball valve. It also causes the sealing ring at the outlet end to wear out too quickly, requiring frequent shutdown of the pipeline and disassembly of the ball valve to replace the sealing ring. This not only makes the ball valve inconvenient to use but also results in high maintenance costs.

[0003] Chinese utility model patent CN 203189774 U describes a ball valve structure for maintaining internal cleanliness. The ball valve includes a valve body, a valve stem, and a valve ball housed within the valve body. One end of the valve stem is fixed to the valve ball, while the other end extends out of the valve body, forming a seal between the valve stem and the valve body. A sealing ring is provided between the valve ball and the valve body. The valve body has an inlet and an outlet end, and the valve ball has a channel connecting the inlet and outlet ends. A cavity is formed between the valve body, valve stem, valve ball, and sealing ring. A through hole is provided at the bottom of the valve ball to connect the cavity to the channel. When this ball valve structure is used in high-pressure media environments, the friction between the valve core and the sealing ring at the outlet end is extremely high, requiring frequent pipeline shutdowns for replacement of the sealing ring, significantly increasing maintenance and operating costs. Utility Model Content

[0004] This invention aims to overcome the shortcomings of the prior art by providing a low-torque, fast-opening and closing electric flange ball valve, which meets the requirements of low-torque opening and closing, high pressure resistance, and low maintenance cost.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: This low-torque, fast-opening and closing electric flange ball valve includes a valve body, a flow channel on the valve body, a valve core for opening and closing the flow channel installed on the flow channel, valve seats inserted into the valve body on both the left and right sides of the valve core, sealing rings that fit on the spherical surface of the valve core fixed on both valve seats, O-rings that fit on the valve seats installed on the valve body, and a set of compression springs installed on the side ends of both valve seats to drive the two valve seats to press towards the spherical surface of the valve core. Supports fixed to the valve body are provided on the upper and lower sides of the valve core, and the opposing surfaces of the two supports are spherical surfaces. The spherical surface has a first annular groove, and the upper and lower surfaces of the valve core have second annular grooves that match the first annular grooves. A set of balls is installed between the first and second annular grooves. A cylindrical block is fixed at the bottom of the valve core. The bottom of the flow channel has a circular hole on the valve body that is inserted into the cylindrical block. A valve stem that drives the valve core to rotate is rotatably connected to the valve body. A circular concave hole is opened on the valve body, and a circular block that is inserted into the circular concave hole is fixed on the valve stem. A mounting base is fixed at the top of the valve body, and a reducer is fixed inside the mounting base. A motor is installed on the input shaft of the reducer, and the output shaft of the reducer is fixed together with the valve stem. The valve seat, sealing ring, and compression spring here function to compensate for the wear of the sealing ring, thereby increasing its service life and reducing maintenance frequency and costs. The support, spherical surface, first annular groove, second annular groove, and ball bearings here provide longitudinal support for the valve core, preventing excessive weight from pressing on the lower half of the sealing ring, which could lead to premature wear and increased maintenance costs due to excessive valve core rotation. Furthermore, the ball bearings reduce the friction generated by valve core rotation, resulting in less resistance, lower torque, and easier rotation. The cylindrical block here... The circular holes, concave holes, and circular blocks serve to resist lateral loads on the valve core, thereby enabling it to withstand high media pressure and preventing excessive wear of the outlet seal ring caused by high media pressure. This not only prevents difficulty in rotating the valve core but also extends the lifespan of the outlet seal ring. The mounting base, reducer, and motor enable rapid opening and closing of the ball valve. The support, spherical surface, first annular groove, and second annular groove not only resist longitudinal loads on the valve core but also provide some resistance to lateral media impacts. The reducer not only changes the direction of the motor's force but also reduces effort required to rotate the valve core.

[0006] Further improvements include fixing circular blocks to the outer contours of the two valve seats, with each compression spring located outside the two valve seats and pressing against the side of the circular blocks. The purpose of the circular blocks and compression springs being located outside the two valve seats and pressing against the side of the circular blocks is to prevent the compression springs from contacting the medium, thereby avoiding the problem of the compression springs aging and failing too quickly.

[0007] Further improvements include a first self-lubricating layer on the outer contour of the cylindrical block, a second self-lubricating layer on the outer contour of the cylindrical block, and a third self-lubricating layer on the valve body that mates with the outer contours of the two valve seats. The first self-lubricating layer reduces frictional resistance during cylindrical block rotation, resulting in smoother and less strenuous valve core rotation; this first self-lubricating layer is made of tin bronze. The second self-lubricating layer also reduces frictional resistance during cylindrical block rotation, resulting in smoother and less strenuous valve core rotation; this second self-lubricating layer is also made of tin bronze. The third self-lubricating layer ensures smoother valve seat movement, preventing jamming; this third self-lubricating layer is also made of tin bronze.

[0008] Further improvements have been made to the valve body, which includes a central valve block, a left valve block, and a right valve block. Sealing blocks are installed between the central and left valve blocks, as well as between the central and right valve blocks. The left and right valve blocks are fixed to the central valve block using fasteners. The use of central, left, and right valve blocks in the valve body not only facilitates ball valve installation but also allows for assembly, eliminating the need for casting the valve body as in traditional ball valves, making it more environmentally friendly and cost-effective. The sealing blocks enhance the sealing performance between the central, left, and right valve blocks, preventing leakage and enabling high-pressure resistance.

[0009] The beneficial effects of this utility model are:

[0010] 1) The arrangement of the support, spherical surface, first annular groove, second annular groove, and ball bearings can provide longitudinal support for the valve core, preventing excessive weight of the valve core from pressing on the lower half of the sealing ring. This would cause excessive wear on the lower half of the sealing ring after the valve core rotates too much, leading to premature failure and increased maintenance costs. In addition, each ball bearing can reduce the friction generated by the rotation of the valve core, making the valve core rotate with less resistance, lower torque, and easier rotation.

[0011] 2) By using a valve seat and compression spring, the valve can replenish the position of the seal ring after it wears out, thereby increasing the service life of the seal ring and reducing maintenance costs;

[0012] 3) By setting up cylindrical blocks, round holes, round concave holes, and round blocks, the valve core can be resisted by lateral loads, thereby resisting high medium pressure and avoiding the situation where high medium pressure presses on the sealing ring at the outlet end, causing the sealing ring at the outlet end to wear too quickly. This not only avoids the difficulty of rotating the valve core, but also makes the sealing ring at the outlet end last longer.

[0013] 4) The ball valve can be opened and closed quickly by means of the mounting base, reducer and motor. Attached Figure Description

[0014] Figure 1This is a perspective view of the present utility model;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model;

[0016] Figure 3 for Figure 2 A magnified view of a portion of region A;

[0017] Figure 4 This is a schematic diagram of the upper support area in this utility model;

[0018] Figure 5 for Figure 2 A magnified view of a portion of region B;

[0019] Figure 6 This is a structural schematic diagram of the lower support area in this utility model.

[0020] Explanation of reference numerals in the attached drawings: Valve body 1, Flow channel 1-1, Circular hole 1-2, Circular concave hole 1-3, Middle valve block 1a, Left valve block 1b, Right valve block 1c, Sealing block 1d, Valve core 2, Second annular groove 2-1, Cylindrical block 2-2, First self-lubricating layer 2-2a, Valve seat 3, Sealing ring 4, Compression spring 5, Support 6, Spherical surface 6-1, First annular groove 6-1a, Ball 7, Valve stem 8, Circular block 8-1, Second self-lubricating layer 8-1a, Mounting base 9, Reducer 10, Motor 11, Circular block 12. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] Referring to the attached diagram: This low-torque, fast-opening and closing electric flange ball valve includes a valve body 1, a flow channel 1-1 on the valve body 1, a valve core 2 for opening and closing the flow channel 1-1 installed on the flow channel 1-1, valve seats 3 inserted into the valve body 1 on both the left and right sides of the valve core 2, and sealing rings 4 fixed on both valve seats 3 that fit into the spherical surface of the valve core 2. O-rings that fit into the valve seats 3 are installed on the valve body 1. A set of compression springs 5 ​​are installed on the side ends of both valve seats 3, respectively driving the two valve seats 3 to press towards the spherical surface of the valve core 2. Supports 6 fixed to the valve body 1 are provided on the upper and lower sides of the valve core 2. The opposing surfaces of the two supports 6 are spherical surfaces 6-1, and both spherical surfaces 6-1 have a first annular groove 6-1a. The valve core 2... The valve body 1 has a second annular groove 2-1 on both the top and bottom surfaces that matches the first annular groove 6-1a. A set of balls 7 are installed between the first annular groove 6-1a and the second annular groove 2-1. A cylindrical block 2-2 is fixed at the bottom of the valve core 2. A circular hole 1-2 is provided at the bottom of the flow channel 1-1, which is opened on the valve body 1 and is inserted into the cylindrical block 2-2. A valve stem 8 that drives the valve core 2 to rotate is rotatably connected to the valve body 1. A circular concave hole 1-3 is opened on the valve body 1. A circular block 8-1 that is inserted into the circular concave hole 1-3 is fixed on the valve stem 8. A mounting base 9 is fixed at the top of the valve body 1. A reducer 10 is fixed inside the mounting base 9. A motor 11 is installed on the input shaft of the reducer 10. The output shaft of the reducer 10 is fixed together with the valve stem 8.

[0023] Annular blocks 12 are fixed to the outer contours of the two valve seats 3, and each compression spring 5 is located outside the two valve seats 3 and presses the side of the annular blocks 12.

[0024] A first self-lubricating layer 2-2a is provided on the outer contour of the cylindrical block 2-2, a second self-lubricating layer 8-1a is provided on the outer contour of the circular block 8-1, and a third self-lubricating layer 1-4 is provided on the valve body 1 to cooperate with the outer contour of the two valve seats 3.

[0025] The valve body 1 includes a middle valve block 1a, a left valve block 1b, and a right valve block 1c. A sealing block 1d is installed between the middle valve block 1a and the left valve block 1b, and between the middle valve block 1a and the right valve block 1c. The left valve block 1b and the right valve block 1c are fixed to the middle valve block 1a by fasteners.

[0026] The working principle of this utility model is as follows: When it is necessary to close the low-torque, fast-opening and closing electric flange ball valve, simply start the motor 11, which drives the reducer 10 to rotate. The reducer 10 rotates, which in turn drives the valve stem 8 to rotate, and then drives the valve core 2 to rotate. Because the valve core 2 is longitudinally supported by the upper and lower supports 6 and operates with low friction through the balls 7, the frictional resistance of the valve core 2 is small, making it easy for the motor 11 to drive. During the closing process, the pressure area of ​​the high-pressure medium on the spherical surface of the valve core 2 gradually increases, thus gradually increasing the lateral impact force on the valve core 2. At this time, the cylindrical block 2- The components 2 and 8-1 are fitted at the circular holes 1-2 and 1-3, respectively, which can resist lateral impact loads on the valve core 2. The valve core 2 will not be squeezed towards the sealing ring 4 at the outlet end by the impact of high pressure medium. Thus, during the process of closing the ball valve, the valve core 2 remains stationary, which will not cause the sealing ring 4 at the outlet end to be squeezed and wear accelerated, nor will it cause the valve stem 8 to require a large torque to drive the valve core 2 to rotate. Therefore, this utility model can not only withstand high pressure medium operation, but also has a longer service life of the sealing ring 4. The valve core 2 can be driven to rotate with low torque, which greatly reduces the customer's use and maintenance costs. It is worth promoting and applying.

[0027] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A low-torque, fast-opening and closing electric flange ball valve, comprising a valve body (1), wherein a flow channel (1-1) is provided on the valve body (1), characterized in that: A valve core (2) for opening and closing the flow channel (1-1) is installed on the flow channel (1-1). A valve seat (3) is provided on the left and right sides of the valve core (2) and inserted into the valve body (1). A sealing ring (4) that fits on the spherical surface of the valve core (2) is fixed on both valve seats (3). A set of compression springs (5) is installed on the side end of both valve seats (3) to drive the two valve seats (3) to press towards the spherical surface of the valve core (2). A support (6) fixed on the upper and lower sides of the valve core (2) is provided on the valve body (1). The opposite surfaces of the two supports (6) are spherical surfaces (6-1). A first annular groove (6-1a) is opened on both spherical surfaces (6-1). The valve core (2) has a second annular groove (2-1) on both the upper and lower surfaces that matches the first annular groove (6-1a). A set of ball bearings (7) is installed between the first annular groove (6-1a) and the second annular groove (2-1). A cylindrical block (2-2) is fixed at the bottom of the valve core (2). A circular hole (1-2) is provided at the bottom of the flow channel (1-1) and is opened on the valve body (1) and is inserted into the cylindrical block (2-2). A valve rod (8) that drives the valve core (2) to rotate is rotatably connected to the valve body (1). A circular concave hole (1-3) is opened on the valve body (1). A circular block (8-1) that is inserted into the circular concave hole (1-3) is fixed on the valve rod (8). The valve body (1) has a mounting base (9) fixed at the top, and a speed reducer (10) is fixed inside the mounting base (9). A motor (11) is installed on the input shaft of the speed reducer (10), and the output shaft of the speed reducer (10) is fixed together with the valve stem (8). The outer contours of the two valve seats (3) are fixed with ring blocks (12), and each of the compression springs (5) is located outside the two valve seats (3) and presses the side of the ring blocks (12).

2. The low-torque, fast-opening and closing electric flange ball valve according to claim 1, characterized in that: The outer contour of the cylindrical block (2-2) is provided with a first self-lubricating layer (2-2a), the outer contour of the circular block (8-1) is provided with a second self-lubricating layer (8-1a), and the valve body (1) is provided with a third self-lubricating layer (1-4) that cooperates with the outer contour of the two valve seats (3).

3. The low-torque, fast-opening and closing electric flange ball valve according to claim 1, characterized in that: The valve body (1) includes a middle valve block (1a), a left valve block (1b) and a right valve block (1c). There are sealing blocks (1d) between the middle valve block (1a) and the left valve block (1b) and between the middle valve block (1a) and the right valve block (1c). The left valve block (1b) and the right valve block (1c) are fixed to the middle valve block (1a) by fasteners.

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