A top-loading ultra-low temperature C-type wear-resistant ball valve

Abstract

The present invention discloses a top-mounted ultra-low temperature C-type wear-resistant ball valve, comprising a valve body, a "C"-shaped sphere is rotatably connected in the valve body, a backing plate is installed on the valve body, an upper mounting bracket is fixedly connected to the backing plate, a driving mechanism is installed on the upper mounting bracket, the output end of the driving mechanism is transmission-connected with the "C"-shaped sphere through an upper shaft, a sealing member is embedded in one side of the valve body, the middle part of the sealing member is connected to the valve body, and the "C"-shaped sphere and the sealing member are adapted to each other. The present invention can avoid the existence of dead space, so that slag is not easy to accumulate and scaling is reduced. At the same time, automatic cleaning of the interior can be achieved by flushing with fluid. The spherical sealing surface is small, so the sealing performance is good, the force that the switch needs to overcome is relatively small, the switch has a micro torque, and high temperature anti-locking.

Description

Technical Field

[0001] The invention relates to the technical field of ball valves, in particular to a top-mounted ultra-low temperature C-type wear-resistant ball valve. Background Art

[0002] The top-mounted eccentric semi-ball valve uses an eccentric valve body, an eccentric ball and a valve seat. The valve stem is automatically centered on a common trajectory when it rotates. The valve is closed more and more tightly during the closing process, completely achieving a good sealing purpose. The ball and valve seat of the valve are completely separated, eliminating the wear of the sealing ring, overcoming the problem of the traditional ball valve seat and the ball sealing surface always wearing. The non-metallic elastic material is embedded in the metal seat, and the metal surface of the valve seat is well protected. Considering the complexity of the use environment, in order to ensure the wear resistance of the ball valve surface, wear-resistant paint is generally sprayed on its surface. The wear-resistant paint is mainly reflected in its wear resistance. The wear-resistant paint has excellent mechanical properties, strong adhesion, scratch resistance, acid and alkali resistance, and corrosion resistance.

[0003] In the prior art, when ball valves are used in the energy and chemical industry, the sealing effect is difficult to be stably guaranteed under harsh working conditions of high temperature, high pressure and complex process media. After long-term use, the existing conventional eccentric ball valves are difficult to ensure the sustainability of the sealing effect. Summary of the invention

[0004] The object of the present invention is to provide a top-mounted ultra-low temperature C-type wear-resistant ball valve to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A top-mounted ultra-low temperature C-type wear-resistant ball valve comprises a valve body, a "C"-shaped sphere is rotatably connected to the valve body, a backing plate is installed on the valve body, a top-mounted bracket is fixedly connected to the backing plate, a driving mechanism is installed on the top-mounted bracket, an output end of the driving mechanism is transmission-connected to the "C"-shaped sphere through an upper shaft, a sealing member is embedded in one side of the valve body, the middle part of the sealing member is connected to the valve body, and the "C"-shaped sphere and the sealing member are correspondingly adapted.

[0007] As a further solution of the present invention: the valve body is horizontally penetrated, both ends of the valve body are provided with flanges for connection, and the top of the valve body is provided with a gasket through bolt assembly connection.

[0008] As a further solution of the present invention: the upper shaft is fixedly connected to the upper end of the "C"-shaped sphere and is rotationally connected to the pad. The upper shaft passes through the upper bracket and is transmission-connected to the output end of the driving mechanism.

[0009] As a further solution of the present invention: the center line of the valve body is eccentrically arranged with respect to the center line of the upper shaft, and the center line of the upper shaft is eccentrically arranged with respect to the center line of the spherical surface of the "C"-shaped sphere.

[0010] As a further solution of the present invention: a lower shaft is provided at the bottom of the valve body opposite to the "C"-shaped sphere, the axis of the lower shaft coincides with the axis of the upper shaft, and the lower shaft and the "C"-shaped sphere are movably engaged.

[0011] As a further solution of the present invention: the sealing member includes a fixed bushing and a sealing ring that is slidably fitted on one side of the end of the fixed bushing, the fixed bushing is an annular structure, the fixed bushing is embedded in one side of the inner wall of the valve body, the inner cavity of the fixed bushing is connected with the inner cavity of the valve body in the horizontal direction, and a sealing sleeve is fixedly sleeved at the opening on one side of the sealing ring away from the fixed bushing.

[0012] As a further solution of the present invention: a sliding sleeve is coaxially arranged on one side of the fixed bushing away from the "C"-shaped sphere, and the sliding sleeve slides with the inner wall of the valve body in a horizontal direction and is connected via a spring.

[0013] As a further solution of the present invention: the sealing sleeve has a funnel-shaped opening on one side away from the sealing ring, the sealing sleeve is movably adapted to the spherical side of the "C"-shaped sphere, and the fixed bushing, the sealing ring and the middle of the sealing sleeve are horizontally connected.

[0014] As a further solution of the present invention: a deflection sleeve is provided on one side of the sealing ring close to the fixed bushing, the deflection sleeve and the sealing ring are integrally arranged, the outer side of the deflection sleeve is an annular spherical surface, and the inner wall of the fixed bushing is slidably fitted with the surface of the deflection sleeve.

[0015] As a further solution of the present invention: deflection grooves are symmetrically embedded on both sides of the deflection sleeve near one end of the sealing ring, and sliding buckles are symmetrically fixedly connected to the inner wall of the fixed bushing on both sides opposite to the deflection groove. The sliding buckles are slidably fitted with the inner wall of the deflection groove, and deflection springs are connected between the two sides of the sliding buckle and the inner walls of the deflection groove.

[0016] As a further solution of the present invention: the deflection grooves are arranged on the front and rear sides of the "C"-shaped sphere in the rotation direction.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: through the structural setting of the "C"-shaped sphere, the existence of dead space can be avoided, so that slag is not easy to accumulate and scaling is reduced. At the same time, automatic internal cleaning can be achieved by flushing with fluid. The "C"-shaped sphere can also be directly installed vertically through the upper end of the valve body, and the assembly is simple and convenient. This kind of "C"-shaped ball valve has less fluid flushing during the switching process than the "O"-shaped ball valve. The flow channel is full-diameter and has lower pressure loss in the fully open or fully closed state. The hole of the sphere is directly aligned with the pipeline or completely closed, and the fluid can pass through unimpeded. Because the eccentric spherical sealing surface of the "C"-shaped sphere is small, the sealing performance is good, the force that needs to be overcome by the switch is relatively small, the switch has a micro torque, and high temperature anti-locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the valve body in the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the sealing member and the "C"-shaped sphere in the present invention when they are not in contact.

[0021] Figure 4 It is a schematic diagram of the structure of the sealing member and the "C"-shaped sphere in the initial contact state in the present invention.

[0022] Figure 5 It is a schematic diagram of the structure of the sealing member and the "C"-shaped sphere in the present invention in a state of nearly complete contact.

[0023] Figure 6 It is a schematic diagram of the structure of the sealing member and the "C"-shaped sphere in the present invention in a state of complete contact.

[0024] Figure 7 It is a schematic diagram of the structure of the sealing member in the present invention.

[0025] Figure 8 It is a structural schematic diagram of the sealing ring in the present invention.

[0026] Fig. 9 It is a schematic diagram of the structure of the fixed bushing in the present invention.

[0027] Fig.10 for Fig. 9 Schematic diagram of the enlarged structure of area A in the middle.

[0028] In the figure: 1-valve body, 2-sealing member, 21-fixed bushing, 2101-sliding sleeve, 2102-sliding buckle, 2103-deflection spring, 22-sealing ring, 2201-deflection sleeve, 2202-deflection groove, 23-sealing sleeve, 3-shim, 4-upper bracket, 5-driving mechanism, 6-"C" shaped sphere, 61-lower shaft, 62-upper shaft. DETAILED DESCRIPTION

[0029] See also Figure 1-3 In an embodiment of the present invention, a top-mounted ultra-low temperature C-type wear-resistant ball valve includes a valve body 1, a "C"-shaped ball 6 is rotatably connected in the valve body 1, a backing plate 3 is installed on the valve body 1, an upper mounting bracket 4 is fixedly connected on the backing plate 3, a driving mechanism 5 is installed on the upper mounting bracket 4, and an output end of the driving mechanism 5 is transmission-connected to the "C"-shaped ball 6 through an upper shaft 62. A sealing member 2 is embedded in one side of the valve body 1, and the middle part of the sealing member 2 is connected to the valve body 1, and the "C"-shaped ball 6 is correspondingly adapted to the sealing member 2.

[0030] The valve body 1 is horizontally through-set, and flanges are provided on both ends of the valve body 1. A gasket 3 is provided on the top of the valve body 1 through bolt assembly. After opening the gasket 3, the valve body 1 can be easily inspected and maintained. The upper shaft 62 is fixedly connected to the upper end of the "C"-shaped sphere 6 and forms a rotation connection with the gasket 3. The upper shaft 62 passes through the upper bracket 4 and is transmission-connected to the output end of the driving mechanism 5. The driving mechanism 5 can be a motor group, which can drive the upper shaft 62 to drive the "C"-shaped sphere 6 to rotate. The driving mechanism 5 can also be a conventional rotating structure for controlling the opening and closing of a ball valve in the prior art, and the transmission control of the "C"-shaped sphere 6 is realized through the cooperation of a gear pair. This is the prior art and will not be repeated here.

[0031] like Figure 2-6As shown, the cross section of the "C"-shaped sphere 6 is preferably a "C"-shaped structure. When one side of the spherical surface of the "C"-shaped sphere 6 is completely fitted with the sealing member 2, the flow channel in the valve body 1 can be blocked, so that the valve as a whole is in a closed state. When the "C"-shaped sphere 6 rotates relatively, there is a gap between the spherical surface of the "C"-shaped sphere 6 and the sealing member 2, and the valve can be opened at this time. The structural setting of the "C"-shaped sphere 6 has a better response speed than the setting of the traditional through hole in the center of the sphere, and preferably, there is an offset between the center line of the valve body 1 and the center line of the upper shaft 62. The center line of the upper shaft 62 and the center line of the spherical surface of the "C"-shaped sphere 6 are set eccentrically. The double eccentric setting can make the motion trajectory of the "C"-shaped sphere 6 similar to the trajectory of the rotation of the cam mechanism. Only in the range of 3-5° during the relative opening or closing (releasing or completing the full contact state) of the "C"-shaped sphere 6 and the seal 2, there will be substantial contact. The friction in the stroke of the "C"-shaped sphere 6 is greatly reduced, and a forced hard seal can be achieved; the friction is reduced during the switching process, and the torque can also be reduced, thereby extending the service life and greatly reducing the frequency of repairing the sealing structure. Among them, a lower shaft 61 is provided at the bottom of the valve body 1 opposite to the "C"-shaped sphere 6. The axis of the lower shaft 61 coincides with the axis of the upper shaft 62, and the lower shaft 61 and the "C"-shaped sphere 6 are movably abutted. The end of the lower shaft 61 can contact the "C"-shaped sphere 6 through a ball, or it can be a contact abutment between smooth planes. This kind of fixed matching mode of the lower shaft 61 can avoid the blockage of ultrafine materials.

[0032] The structural setting of the "C"-shaped sphere 6 can avoid the existence of dead space, so that slag is not easy to accumulate and scaling is reduced. At the same time, automatic internal cleaning can be achieved by flushing with fluid. The "C"-shaped sphere 6 can also be directly installed vertically through the upper end of the valve body 1, which is simple and convenient to assemble. This kind of "C"-shaped ball valve has less fluid flushing during the switching process than the "O"-shaped ball valve. The flow channel is full-diameter and has lower pressure loss in the fully open or fully closed state. The hole of the sphere is directly aligned with the pipeline or completely closed, and the fluid can pass through unimpeded. Because the eccentric spherical sealing surface of the "C"-shaped sphere 6 is small, the sealing performance is good, the force that needs to be overcome by the switch is relatively small, the switch has a micro torque, and high temperature anti-locking.

[0033] The structure of the "C"-shaped sphere 6 mainly adopts nickel-based alloy hot cladding and supersonic (cold spray) spraying technology, and the hardness can reach HRC55-65. Nickel-based alloy has good friction resistance, impact resistance, corrosion resistance and other properties, and can be applied to most harsh working conditions of coal gasification. It can be sprayed with tungsten carbide, chromium carbide, cobalt-based alloy, etc. according to user requirements and process conditions. The C ball is sprayed as a whole under special working conditions to avoid premature erosion and damage to the weak parts inside the channel by the medium.

[0034] Further, such as Figure 7-10 As shown, the sealing member 2 includes a fixed bushing 21 and a sealing ring 22 that is slidably fitted on one side of the end of the fixed bushing 21. The fixed bushing 21 is an annular structure. The fixed bushing 21 is embedded in one side of the inner wall of the valve body 1. The inner cavity of the fixed bushing 21 is connected with the inner cavity of the valve body 1 in the horizontal direction. A sliding sleeve 2101 is concentrically arranged on the side of the fixed bushing 21 away from the "C"-shaped sphere 6. The sliding sleeve 2101 is slidably fitted with the inner wall of the valve body 1 in the horizontal direction and is connected by a spring. A sealing sleeve 23 is fixedly sleeved at the opening of the sealing ring 22 away from the fixed bushing 21. Both the sealing ring 22 and the sealing sleeve 23 are also annular structures. The sealing sleeve 23 can be made of rubber material. The opening of the sealing sleeve 23 away from the sealing ring 22 is funnel-shaped. The sealing sleeve 23 is movably fitted with one side of the spherical surface of the "C"-shaped sphere 6, and the fixed bushing 21, the sealing ring 22 and the sealing sleeve 23 are horizontally connected. When one side of the spherical surface of the "C"-shaped sphere 6 rotates to face the opening of the sealing sleeve 23, the "C"-shaped sphere 6 blocks the sealing sleeve 23, so that the fluid cannot flow from the side of the valve body 1 away from the sealing member 2 to the side of the sealing member 2, and the fluid contacts the inner side of the spherical surface of the "C"-shaped sphere 6, and the stability of the contact between the sealing sleeve 23 and the spherical surface of the "C"-shaped sphere 6 will not be affected. When the spherical surface of the "C"-shaped sphere 6 contacts the sealing sleeve 23, before the complete tight contact (the spherical surface of the "C"-shaped sphere 6 is completely opposite to the opening of the sealing sleeve 23), the sealing sleeve 23, the sealing ring 22 and the fixed bushing 21 will be pushed to have a process of elastic sliding relative to the inner cavity of the valve body 1 through the sliding sleeve 2101. Of course, an elastic member, such as an elastically deformable air bag or a rubber ring, can also be passed between the sliding sleeve 2101 and the valve body 1 instead of the spring. Such an arrangement can facilitate that after the “C”-shaped sphere 6 rotates to completely and tightly contact the sealing sleeve 23, the sealing sleeve 23 can be stably fitted and the sealing effect is better.

[0035] In actual use, in order to ensure the tightness of contact between the sealing sleeve 23 and the "C"-shaped sphere 6, there will inevitably be friction, and there will be a certain amount of loss in this process. Therefore, preferably, a deflection sleeve 2201 is provided on the side of the sealing ring 22 close to the fixed bushing 21, and the deflection sleeve 2201 and the sealing ring 22 are integrally arranged, and the outer side of the deflection sleeve 2201 is an annular spherical surface, and the inner wall of the fixed bushing 21 is slidably fitted with the surface of the deflection sleeve 2201, and the sealing ring 22 and the sealing sleeve 23 can The deflection sleeve 2201 can be tilted relative to the fixed sleeve 21 by cooperating with the inner wall of the fixed sleeve 21, and the deflection grooves 2202 are symmetrically embedded on both sides of the deflection sleeve 2201 near one end of the sealing ring 22, and the inner wall of the fixed sleeve 21 and the two sides opposite to the deflection groove 2202 are symmetrically fixedly connected with sliding buckles 2102, and the sliding buckles 2102 are slidably fitted with the inner wall of the deflection groove 2202, and deflection springs 2103 are connected between the two sides of the sliding buckle 2102 and the inner walls of the deflection groove 2202. Preferably, the deflection groove 2202 is arranged on the front and rear sides of the deflection sleeve 2201, that is, on the front and rear sides in the rotation direction of the "C"-shaped sphere 6. When the spherical surface of the "C"-shaped sphere 6 rotates and contacts the surface of the sealing sleeve 23, under the contact force, the "C"-shaped sphere 6 can act to make the sealing sleeve 23, the sealing ring 22 and the deflection sleeve 2201 rotate and tilt relative to the fixed bushing 21, the sliding buckle 2102 slides in the deflection groove 2202, and the deflection spring 2103 is deformed. After the "C"-shaped sphere 6 continues to rotate, the sealing sleeve 23, the sealing ring 22 and the deflection sleeve 2201 can be adaptively tilted. Slanted, this contact mode can make the sealing sleeve 23 better adapt to the spherical surface of the "C"-shaped sphere 6, thereby reducing hard friction, and when the "C"-shaped sphere 6 rotates to be opposite to the opening of the sealing sleeve 23, the two sides of the spherical surface of the "C"-shaped sphere 6 can act on the sealing sleeve 23 to make the angle between it and the fixed sleeve 21 approach the original state (when no force is applied, the axes of the fixed sleeve 21, the sealing ring 22 and the sealing sleeve 23 coincide). Even if there is a slight error, the relative inclination angle between the sealing sleeve 23 and the fixed sleeve 21 can be adjusted to ensure that the sealing sleeve 23 and the "C"-shaped sphere 6 fit closely. This implementation method can greatly reduce the hard friction between the sealing sleeve 23 and the "C"-shaped sphere 6, and facilitate the rotation of the "C"-shaped sphere 6. At the same time, the cooperation of the sliding buckle 2102 and the deflection groove 2202 can also facilitate the positioning of the relative rotation between the fixed bushing 21 and the sealing ring 22, control the amplitude and angle, and ensure stability and safety during the specific working process.

Claims

1. A top-loading ultra-low temperature C-type wear-resistant ball valve, comprising a valve body, a backing plate is installed on the valve body, a top-loading bracket is fixedly connected to the backing plate, and a driving mechanism is installed on the top-loading bracket, characterized in that: A "C"-shaped ball is rotatably connected in the valve body, the output end of the driving mechanism is transmission-connected to the "C"-shaped ball through the upper shaft, a sealing member is embedded in one side of the valve body, the middle part of the sealing member is connected to the valve body, and the "C"-shaped ball and the sealing member are adapted accordingly; The sealing member comprises a fixed bushing and a sealing ring slidingly fitted on one side of the end of the fixed bushing, wherein the fixed bushing is an annular structure, and the fixed bushing is embedded on one side of the inner wall of the valve body, and the inner cavity of the fixed bushing is connected with the inner cavity of the valve body in the horizontal direction, and a sealing sleeve is fixedly sleeved at the opening of the sealing ring away from the fixed bushing; A deflection sleeve is provided on one side of the sealing ring close to the fixed bushing, the deflection sleeve and the sealing ring are integrally arranged, the outer side of the deflection sleeve is an annular spherical surface, and the inner wall of the fixed bushing is slidably fitted with the surface of the deflection sleeve; Deflection grooves are symmetrically embedded on both sides of the deflection sleeve near one end of the sealing ring, and sliding buckles are symmetrically fixedly connected to the inner wall of the fixed bushing on both sides opposite to the deflection groove. The sliding buckles are slidably fitted with the inner wall of the deflection groove, and deflection springs are connected between the two sides of the sliding buckle and the inner walls of the deflection groove. The center line of the valve body is eccentrically arranged with respect to the center line of the upper shaft, and the center line of the upper shaft is eccentrically arranged with respect to the center line of the spherical surface of the "C"-shaped sphere; A sliding sleeve is coaxially arranged on one side of the fixed bushing away from the "C"-shaped sphere. The sliding sleeve slides with the inner wall of the valve body in a horizontal direction and is connected via a spring.

2. A top-loading ultra-low temperature C-type wear-resistant ball valve according to claim 1, characterized in that: The upper shaft is fixedly connected to the upper end of the "C"-shaped sphere and is rotationally connected to the pad. The upper shaft passes through the upper bracket and is transmission-connected to the output end of the driving mechanism.

3. A top-loading ultra-low temperature C-type wear-resistant ball valve according to claim 1, characterized in that: A lower shaft is provided at the bottom of the valve body opposite to the "C"-shaped sphere, the axis of the lower shaft coincides with the axis of the upper shaft, and the lower shaft and the "C"-shaped sphere are movably abutted against each other.

4. A top-loading ultra-low temperature C-type wear-resistant ball valve according to claim 1, characterized in that: The sealing sleeve has a funnel-shaped opening on one side away from the sealing ring, and the sealing sleeve is movably adapted to one side of the spherical surface of the "C"-shaped sphere, and the fixed bushing, the sealing ring and the middle of the sealing sleeve are horizontally connected.

5. The top-loading ultra-low temperature C-type wear-resistant ball valve according to claim 1 is characterized in that: The deflection grooves are arranged at the front and rear sides of the "C"-shaped sphere in the rotation direction.

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