High-pressure-resistant ball valve

Abstract

The utility model discloses a high-pressure-resistant ball valve which comprises a valve body, a transverse medium channel is formed in the position of the valve body, a longitudinal installation channel is formed in the valve body, a valve element is installed in the valve body, valve seats are arranged on the left side and the right side of the valve element respectively, sealing rings are installed on the opposite faces of the two valve seats respectively, and compression springs are installed at the side ends of the two valve seats respectively. Cylindrical tables are fixed to the upper end and the lower end of the valve element, a pair of bearings is installed at the longitudinal installation channel, the two cylindrical tables are sleeved with inner rings of the two bearings, a notch is formed in the bottom face of the cylindrical table on the lower side, and a thrust bearing is installed between the notch and the bottom face of the longitudinal installation channel. A cylindrical rod is fixed to the top end of the upper side cylindrical table, and a pulling rod is fixed to the top end of the cylindrical rod. In a high-pressure medium environment, a high-pressure medium can impact the valve element, and the valve element can bear the impact of the high-pressure medium through transverse supporting of the cylindrical tables at the upper end and the lower end, so that the sealing ring on the pressure side is influenced by the high-pressure medium, the high-pressure medium environment can be borne, and the valve is worthy of application and popularization.

Description

Technical Field

[0001] The utility model relates to a valve, in particular to a ball valve, and more particularly to a high-pressure resistant ball valve. Background Art

[0002] A ball valve is a valve in which the closing and opening member (ball) is driven by a valve stem and rotates around the axis of the ball valve. Traditionally, for the sealing of the valve core of a ball valve, a sealing ring is installed on the valve seat and the sealing is achieved by the contact between the sealing ring and the spherical surface of the valve core. Due to the special material properties of the sealing ring, in a high-pressure medium environment, the sealing ring on the pressure-bearing side of the valve core will be severely squeezed. This will not only cause a large extrusion friction force on the sealing ring, making it difficult to drive the valve core to open and close, but also, even if the valve core is forced to open and close, the sealing ring on the pressure-bearing side will be severely worn, and the sealing ring will be damaged after a short time and cannot be used in a high-pressure medium environment. Traditionally, for use in a high-pressure medium environment, a gate valve is usually used, but a gate valve can only be fully opened and fully closed for the medium and cannot be adjusted and throttled, so it is not suitable for some working conditions.

[0003] Chinese Utility Model Patent CN 203189774 U discloses a ball valve structure for keeping the inside of the ball valve clean. The ball valve structure includes a valve body, a valve stem, and a valve ball disposed inside the valve body. One end of the valve stem is fixedly connected to the valve ball, and the other end extends out of the valve body and forms 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 a water inlet end and a water outlet end. The valve ball has a channel capable of conducting the water inlet end and the water outlet end. A cavity is formed among the valve body, the valve stem, the valve ball, and the sealing ring. A through hole is opened at the bottom of the valve ball to connect the cavity with the channel. In a high-pressure medium environment, the valve ball of this ball valve structure will be pushed by the high-pressure medium, thus squeezing at the sealing ring on the pressure-bearing side. In a high-pressure medium environment, the sealing ring on the pressure-bearing side not only affects the opening and closing rotation operation of the valve ball, but also is extremely easy to damage the sealing ring, and it will break after being used a few times, so it cannot be used continuously and is not suitable for a high-pressure medium environment. Summary of the Utility Model

[0004] The utility model aims to solve the above-mentioned disadvantages of the prior art and provides a high-pressure resistant ball valve capable of being used in a high-pressure medium, meeting the requirement of using a ball valve in a high-pressure medium environment.

[0005] The technical solution adopted by the present utility model to solve its technical problems: This high-pressure resistant ball valve includes a valve body. A transverse medium passage is opened in the valve body, and a longitudinal installation passage communicating with the transverse medium passage is opened on the valve body. A valve core for opening and closing the transverse medium passage is installed in the valve body. Valve seats inserted on the valve body are provided on both the left and right sides of the valve core. Sealing rings are installed on the opposite surfaces of the two valve seats. Compression springs for pressing the two valve seats towards the spherical surface direction of the valve core are installed at the side ends of the two valve seats. Cylindrical platforms integrally formed with the valve core are fixed at both the upper and lower ends of the valve core. A pair of bearings are installed in the longitudinal installation passage, and the inner rings of the two bearings are sleeved at the two cylindrical platforms. A notch is opened at the bottom surface of the lower side cylindrical platform, and a thrust bearing for supporting the valve core is installed between the notch and the bottom surface of the longitudinal installation passage. A cylindrical rod extending out of the valve body and integrally formed with the upper side cylindrical platform is fixed at the top end of the upper side cylindrical platform, and a lever for turning the valve core is fixed at the top end of the cylindrical rod. The function of the transverse medium passage here is to be used for medium transportation; the function of the valve core here is to be used for opening and closing the transverse medium flow passage; the functions of the valve seat and the compression spring here are to be able to seal the ball valve, and when the sealing ring is worn, to be able to compensate for the position, thereby improving the service life of the ball valve; the functions of the cylindrical platform, the bearing, and the thrust bearing here are to be able to support the valve core for the transverse medium force and the longitudinal support of the valve core, thereby being able to greatly improve the pressure resistance of the ball valve, avoiding the strong medium pressure acting on the sealing ring on the stressed side, so that under the strong medium pressure, the wear rate of the sealing ring on the stressed side is accelerated, which not only makes it difficult to open the ball valve, but also the sealing ring is easily worn. However, the present utility model adopts the support of two integrally formed cylindrical platforms combined with bearings and thrust bearings, which can act the medium pressure on the bearings, thereby not causing damage to the sealing ring. Not only is it easy to open and close the ball valve, but also the sealing ring is not easily damaged, and it can greatly enhance the pressure resistance of the medium, so as to be applicable to use in a high-pressure medium environment; the function of the lever here is to be able to conveniently open and close the ball valve.

[0006] For further improvement, dovetail grooves are opened on both sides of the valve body, cylinders matching the dovetail grooves are fixed at the side ends of the two valve seats, and an O-ring matching the cylinders is installed on the valve body. The functions of the dovetail groove, the cylinder, and the O-ring here are to be able to prevent the medium from contacting the compression spring, thereby preventing the compression spring from being corroded by the medium and affecting the service life.

[0007] For further improvement, a first self-lubricating layer is provided on the outer contour surface of the valve seat, and a second self-lubricating layer is provided on the outer contour surface of the cylinder. The functions of the first self-lubricating layer and the second self-lubricating layer here are to make the movement of the valve seat have extremely small friction and be able to prevent the valve seat from jamming; the first self-lubricating layer and the second self-lubricating layer are made of tin bronze material.

[0008] For further improvement, a limiting rod is fixed on the cylindrical rod, and an arc-shaped notch is formed on the valve body, which cooperates with the limiting rod and is used to limit the fully open position and the fully closed position of the valve core. The functions of the limiting rod and the arc-shaped notch are to make it convenient to drive the lever to control the valve to be in the fully open or fully closed position.

[0009] For further improvement, a pair of threaded handles are threadedly connected to the top of the valve body and are arranged at a 90° angle and are used to lock the fully open position of the valve core and the fully closed position of the valve core. Conical blocks are fixed on the bottom surfaces of the two threaded handles, and a conical hole paired with the conical block is formed on the top surface of the limiting rod. The functions of the threaded handle, the conical block, and the conical hole are to be able to lock the fully open position or the fully closed position of the valve to avoid the situation that the valve cannot be tightly closed or fully opened due to vibration.

[0010] For further improvement, a liquid inlet mounting flange is fixed on one side of the valve body, and a liquid outlet mounting flange is fixed on the other side of the valve body. The functions of the liquid inlet mounting flange and the liquid outlet mounting flange are to facilitate the installation of the pipeline.

[0011] The beneficial effects of the present utility model are as follows:

[0012] 1). In a high-pressure medium environment, the high-pressure medium will impact the valve core. The valve core can withstand the impact of the high-pressure medium through the lateral support of the cylindrical platforms at the upper and lower ends, so as to be affected by the high-pressure medium of the sealing ring on the pressure-receiving side, and thus can withstand the high-pressure medium environment;

[0013] 2). The thrust bearing can longitudinally support the valve core, so as to ensure that the valve core rotates more labor-savingly and has less frictional resistance;

[0014] 3). It can lock the fully open and fully closed states of the ball valve to avoid the problem that the ball valve cannot be tightly locked and cannot be fully opened due to external factors. Description of the Drawings

[0015] Figure 1 is a three-dimensional view of the present utility model;

[0016] Figure 2 is a structural schematic diagram of the present utility model;

[0017] Figure 3 is Figure 2 a partial enlarged view of area A of

[0018] Figure 4 is a structural schematic diagram of the limiting rod area in the present utility model;

[0019] Figure 5 is Figure 4 a sectional view taken along line B-B of

[0020] Description of reference numerals: valve body 1, transverse medium passage 1-1, longitudinal installation passage 1-2, dovetail groove 1-3, arc notch 1-4, liquid inlet installation flange 1-5, liquid outlet installation flange 1-6, valve core 2, cylindrical platform 2a, notch 2a-1, valve seat 3, cylinder body 3-1, first self-lubricating layer 3-2, sealing ring 4, compression spring 5, bearing 6, cylindrical rod 7, lever 8, O-ring 9, limit rod 10, conical hole 10-1, thrust bearing 11, threaded handle 13, conical block 13-1. Detailed implementation mode

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

[0022] Referring to the accompanying drawings: This high-pressure resistant ball valve includes a valve body 1. A transverse medium passage 1-1 is opened in the valve body 1. A longitudinal installation passage 1-2 communicating with the transverse medium passage 1-1 is opened on the valve body 1. A valve core 2 for opening and closing the transverse medium passage 1-1 is installed in the valve body 1. Valve seats 3 inserted on the valve body 1 are provided on both the left and right sides of the valve core 2. Sealing rings 4 are installed on the opposite surfaces of the two valve seats 3. Compression springs 5 for pressing the two valve seats 3 towards the spherical surface direction of the valve core 2 are installed at the side ends of the two valve seats 3. Cylindrical platforms 2a integrally formed with the valve core 2 are fixed at both the upper and lower ends of the valve core 2. A pair of bearings 6 are installed at the longitudinal installation passage 1-2. The inner rings of the two bearings 6 are sleeved on the two cylindrical platforms 2a. A notch 2a-1 is opened on the bottom surface of the lower side cylindrical platform 2a. A thrust bearing 11 for supporting the valve core 2 is installed between the notch 2a-1 and the bottom surface of the longitudinal installation passage 1-2; A cylindrical rod 7 extending out of the valve body 1 and integrally formed with the upper side cylindrical platform 2a is fixed at the top of the upper side cylindrical platform 2a. A lever 8 for turning the valve core 2 is fixed at the top of the cylindrical rod 7.

[0023] Dovetail grooves 1-3 are opened on both sides of the valve body 1. Cylinder bodies 3-1 matched with the dovetail grooves 1-3 are fixed at the side ends of the two valve seats 3. An O-ring 9 matched with the cylinder body 3-1 is installed on the valve body 1.

[0024] A first self-lubricating layer 3-2 is provided on the outer contour surface of the valve seat 3, and a second self-lubricating layer 3-1a is provided on the outer contour surface of the cylinder body 3-1.

[0025] A limit rod 10 is fixed on the cylindrical rod 7. An arc notch 1-4 matched with the limit rod 10 and used for limiting the fully open position and the fully closed position of the valve core 2 is opened on the valve body 1.

[0026] A pair of threaded handles 13 arranged at a 90° angle and used for locking the fully open position and the fully closed position of the valve core 2 are threadedly connected to the top of the valve body 1. Conical blocks 13-1 are fixed on the bottom surfaces of the two threaded handles 13. A conical hole 10-1 paired with the conical block 13-1 is opened on the top surface of the limit rod 10.

[0027] One side of the valve body 1 is fixed with an inlet liquid installation flange 1-5, and the other side of the valve body 1 is fixed with an outlet liquid installation flange 1-6.

[0028] The working principle of the present utility model: When the high-pressure medium impacts the valve core 2, the valve core 2 acts on the two bearings 6 with the transverse medium pressure through the two integrally formed cylindrical platforms 2a, and the weight of the valve core 2 is supported by the thrust bearing 11. The high-pressure transverse impact force of the medium acts on the valve core 2 and is transmitted through the two cylindrical platforms 2a to act on the two bearings 6, so that the sealing ring 4 on the compressed side will not be extruded by the high-pressure medium, ensuring that the sealing ring 4 can be used normally in the high-pressure medium environment, not affecting the service life of the sealing ring 4, and also ensuring the long-life use of the ball valve; When the ball valve is in the fully open position, turn the threaded handle 13 on one side and fit the conical block 13-1 into the conical hole 10-1 to lock the ball valve in the fully open state; When the ball valve is in the fully closed position, turn the threaded handle 13 on the other side and fit the conical block 13-1 into the conical hole 10-1 to lock the ball valve in the fully closed state; Several threaded handles 13 can also be arranged at multiple angles on the top of the valve body 1 to adapt to the locking when the valve core 2 rotates at different angles; Here, the valve body 1 is made of forged steel material, and here the valve core 2, the two cylindrical platforms 2a and the cylindrical rod 7 are integrally processed from forged steel, so that the valve body 1 and the valve core 2 have higher strength and can withstand higher pressure.

[0029] Although the present utility model has been illustrated and described by referring to the preferred embodiments, those of ordinary skill in the art should understand that various changes in form and details can be made within the scope of the claims.

Claims

1. A high pressure resistant ball valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a transverse medium passage (1-1), the valve body (1) is provided with a longitudinal installation passage (1-2) connected to the transverse medium passage (1-1), a valve core (2) for opening and closing the transverse medium passage (1-1) is installed in the valve body (1), the left and right sides of the valve core (2) are provided with valve seats (3) plugged into the valve body (1), the opposite surfaces of the two valve seats (3) are provided with sealing rings (4), the side ends of the two valve seats (3) are provided with compression springs (5) for driving the two valve seats (3) to press toward the spherical surface of the valve core (2), the upper and lower ends of the valve core (2) are fixed with valves integrally formed with the valve core (2), and the valve core (2) is provided with a plurality of valve seats (3) for pressing the valve core (3) toward the spherical surface of the valve core (2). A cylindrical platform (2a) of the type is provided, wherein a pair of bearings (6) are installed at the longitudinal installation channel (1-2), and the inner rings of the two bearings (6) are sleeved on the two cylindrical platforms (2a); a recess (2a-1) is provided on the bottom surface of the cylindrical platform (2a) on the lower side, and a thrust bearing (11) for supporting the valve core (2) is installed between the recess (2a-1) and the bottom surface of the longitudinal installation channel (1-2); a cylindrical rod (7) extending from the valve body (1) and integrally formed with the cylindrical platform (2a) on the upper side is fixed at the top end of the cylindrical platform (2a), and an actuating rod (8) for actuating the valve core (2) to rotate is fixed at the top end of the cylindrical rod (7).

2. A high pressure resistant ball valve according to claim 1, characterized in that: The valve body (1) is provided with dovetail grooves (1-3) on both sides, and a cylinder (3-1) matching the dovetail grooves (1-3) is fixed to the side ends of the two valve seats (3), and an O-ring (9) matching the cylinder (3-1) is installed on the valve body (1).

3. A high pressure resistant ball valve according to claim 2, characterized in that: A first self-lubricating layer (3-2) is provided on the outer contour surface of the valve seat (3), and a second self-lubricating layer (3-1a) is provided on the outer contour surface of the cylinder (3-1).

4. The high pressure resistant ball valve according to claim 1 is characterized in that: A limit rod (10) is fixed on the cylindrical rod (7), and the valve body (1) is provided with an arc notch (1-4) which cooperates with the limit rod (10) and is used to limit the fully open position of the valve core (2) and the fully closed position of the valve core (2).

5. A high pressure resistant ball valve according to claim 4, characterized in that: The top end of the valve body (1) is threadedly connected to a pair of threaded handles (13) arranged at an angle of 90° and used to lock the valve core (2) in a fully open position and in a fully closed position, and a conical block (13-1) is fixed to the bottom surface of the two threaded handles (13), and a conical hole (10-1) matching the conical block (13-1) is formed on the top surface of the limit rod (10).

6. The high pressure resistant ball valve according to claim 1 is characterized in that: A liquid inlet mounting flange (1-5) is fixed on one side of the valve body (1), and a liquid outlet mounting flange (1-6) is fixed on the other side of the valve body (1).

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