Ball valve

Abstract

The invention discloses a ball valve, which relates to the technical field of valves and comprises an outer valve body, two inner valve covers, a valve core ball body, a hand wheel and a pressure loading device. The two inner valve covers are oppositely arranged in the outer valve body, a valve cavity is formed between the two inner valve covers, and corresponding valve ports are formed in the two inner valve covers and the outer valve body; the valve core ball body is rotatably arranged in the valve cavity around a rotating shaft and is attached to the two inner valve covers; the hand wheel is arranged on the outer side of the outer valve body and fixedly connected with the valve element ball through a rotating shaft, and the pressure loading device is constructed to apply elastic pressure towards the valve element ball to the two inner valve covers. The service life and the stability of the ball valve can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a ball valve. Background Art

[0002] A ball valve is a rotary valve whose opening and closing part (ball) is driven by a valve stem and rotates around the axis of the valve stem to control the on-off and flow rate of the fluid. Traditional ball valves often have deficiencies in sealing performance, especially under harsh working conditions such as high-pressure and high-temperature media. They are prone to leakage, posing a safety hazard to production. During the use of the valve body, there is a gap between the internal valve core ball and the valve body when it rotates and closes, which is prone to leakage. In addition, the internal disassembly, installation, replacement and maintenance are inconvenient. During the blocking process, the medium transported continuously squeezes the valve core ball, which reduces the service life of the valve core ball and makes it less stable. Therefore, a device is needed to solve the above-mentioned problems. Summary of the invention

[0003] The object of the present invention is to provide a ball valve to solve the problems existing in the above-mentioned prior art and to improve the service life and stability.

[0004] To achieve the above object, the present invention provides the following solutions: The present invention provides a ball valve, comprising: an outer valve body, two inner valve covers, a valve core ball, a hand wheel and a pressure loading device. The two inner valve covers are relatively arranged in the outer valve body, a valve cavity is formed between the two inner valve covers, and corresponding valve ports are arranged on the two inner valve covers and the outer valve body; the valve core ball is rotatably arranged in the valve cavity around a rotation axis and fits the two inner valve covers; the hand wheel is arranged on the outer side of the outer valve body and is fixedly connected to the valve core ball through a rotating shaft, and the pressure loading device is constructed to apply elastic pressure toward the valve core ball to the two inner valve covers.

[0005] Preferably, it also includes an extrusion device and two extension tubes, one end of the two extension tubes are respectively connected to the valve ports of the two inner valve covers, at least a portion of each of the extension tubes is a hose, and the extrusion device is constructed to extrude the hose to reduce the cross-sectional area of ​​at least part of the hose.

[0006] Preferably, the extrusion device comprises a driving device and an extrusion push plate, and corresponding extrusion push plates are provided on both sides of each of the hoses, and the driving device can drive the extrusion push plates on both sides to move closer to and away from each other to extrude and release the hose.

[0007] Preferably, the pressure loading device comprises a spring, and a plurality of the springs are arranged on the outer side of the inner valve cover, one end of the spring abuts against the outer wall of the inner valve cover, and the other end abuts against a limit surface, and the spring is always in a compressed state.

[0008] Preferably, the pressure loading device also includes a mounting ring; an annular end face is constructed at the valve port of the inner valve cover, the mounting ring is installed in the extension tube, a plurality of springs are sandwiched between the mounting ring and the annular end face, and the end of the mounting ring facing the annular end face is the limiting surface.

[0009] Preferably, the extension tube is divided into two sections, one section is the hose, and the other section is a rigid tube, one end of the rigid tube is connected to the valve port, and the other end is connected to the hose, and the mounting ring is installed in the rigid tube.

[0010] Preferably, the pressure loading device includes a fixed connecting ring and a plurality of fixed support columns, the fixed connecting ring is fixed to the end of the rigid tube away from the valve port by bolts, one end of the fixed support column is fixedly connected to the fixed connecting ring, and the other end is fixedly connected to the mounting ring.

[0011] Preferably, a fixed connection plate is provided at one end of the rigid tube away from the valve port, a fixed connection flange is fixedly connected to one end of the flexible pipe, and the fixed connection flange and the fixed connection plate are fixedly connected by bolts.

[0012] Preferably, it also includes a base, and the pressure loading device and the outer valve body are fixedly arranged on the base; a pressure relief valve is arranged on the extension pipe on the side of the water inlet direction of the valve port, and the pressure relief valve is connected to a delivery pressure relief hose.

[0013] Preferably, an angle sensor and a controller are provided on the rotating shaft, and the controller, the angle sensor and the pressure loading device are all communicatively connected.

[0014] Compared with the prior art, the present invention has achieved the following technical effects: 1. The inner valve cover in the present invention is always subjected to the elastic pressure from the pressure loading device, so that the inner valve cover is pressed against the valve core ball, and the inner valve cover can always fit with the valve core ball when the valve core ball is repeatedly rotated, thereby preventing the existence of a gap between the valve core ball and the connection end of the extension tube and the valve body. During repeated use, the device has a good sealing and blocking effect and will not leak.

[0015] 2. The present invention can control the extrusion push plate to slide toward the hose to achieve the effect of squeezing the hose, so that the transported medium is blocked by the squeezed hose, reducing the squeezing of the inside of the valve body, so that the valve core ball blocks the medium flow stably, and will not cause a large pressure on the valve core ball, so that the valve core ball has a long service life and a good effect of blocking the flow of the medium. The overall stability of the device can be adjusted, so that the device is not prone to leakage when blocking the internally transported medium.

[0016] 3. When the pressure inside the valve body increases and reaches the set threshold, the pressure relief valve opens, so that the conveyed medium can be discharged through the conveying pressure relief hose to assist in the discharge and reduce the pressure, so that the pressure inside the valve body is within a suitable range, which can not only protect the valve core ball, but also prevent leakage and have a good sealing performance during the use of this equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a ball valve provided in an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure after removing the base and the extrusion device; Figure 3 for Figure 2 Schematic diagram of the overall structure after the middle and outer valve bodies are separated; Figure 4 for Figure 1 Schematic diagram of the structure of the middle extension tube; Figure 5 for Figure 4 Schematic diagram of the split structure of the middle hose and the rigid pipe; Figure 6 for Figure 5 Schematic diagram of the fixed connection plate and the split structure of the rigid pipe; Figure 7 for Figure 6 Schematic diagram of the structure of the medium pressure loading device; Figure 8 for Figure 1 A schematic diagram of the structure of the middle base and the extrusion device; In the figure: 1-extrusion device; 2-hand wheel; 3-delivery pressure relief hose; 4-outer valve body; 5-hose; 6-base; 7-rigid pipe; 8-extension pipe; 9-fixed connection flange; 10-angle sensor; 11-valve core ball; 12-pressure relief valve; 13-connecting pipe; 14-fixed connection plate; 15-bolt; 16-pressure loading device; 17-support base; 18-fixed connection ring; 19-fixed support column; 20-mounting ring; 21-spring; 22-inner valve cover; 25-extrusion push plate; 26-fixed mounting frame plate; 27-electric push rod; 28-fixed mounting base; 29-fixed mounting hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Combine the following Figures 1 to 8 , describing an embodiment of the present invention.

[0022] The present invention provides a ball valve, such as Figure 1 to Figure 8 As shown, it includes: an outer valve body 4, two inner valve covers 22, a valve core ball 11, a hand wheel 2 and a pressure loading device 16. The two inner valve covers 22 are relatively arranged in the outer valve body 4 to form a valve cavity between the two inner valve covers 22, and corresponding valve ports are provided on the two inner valve covers 22 and the outer valve body 4; the valve core ball 11 is rotatably arranged in the valve cavity around a rotation axis and fits with the two inner valve covers 22; the handwheel 2 is arranged on the outside of the outer valve body 4 and is fixedly connected to the valve core ball 11 through a rotating shaft, and the pressure loading device 16 is constructed to apply elastic pressure toward the valve core ball 11 to the two inner valve covers 22, and the edges of the ends of the inner valve covers 22 that are close to each other are tightly fitted with the inner wall of the outer valve body 4 to prevent the fluid from flowing out from the gap between the two, and because the thickness of the inner valve cover 22 is relatively thin, usually 0.5~2mm, it has deformation ability, therefore, under the pressure of the pressure loading device 16, it can be slightly deformed to adapt to the streamline of the inner wall of the outer valve body 4.

[0023] The inner valve cover 22 in the embodiment of the present invention is always subjected to the elastic pressure from the pressure loading device 16, so that the inner valve cover 22 is pressed against the valve core ball 11, and the inner valve cover 22 can always fit with the valve core ball 11 when the valve core ball 11 is repeatedly rotated, thereby preventing the existence of a gap between the valve core ball 11 and the connection end of the extension tube and the valve body. During repeated use, the device has a good sealing and blocking effect and will not leak.

[0024] In some embodiments, the embodiments of the present invention also include an extrusion device 1 and two extension tubes 8, one end of the two extension tubes 8 is respectively connected to the valve ports of the two inner valve covers 22, at least a portion of each extension tube 8 is a hose 5, and the extrusion device 1 is constructed to extrude the hose 5 so as to reduce the cross-sectional area of ​​at least part of the hose 5.

[0025] Specifically, the extrusion device 1 includes a driving device and an extrusion push plate 25. Corresponding extrusion push plates 25 are provided on both sides of each hose 5. The driving device can drive the extrusion push plates 25 on both sides to move closer and farther to extrude and release the hose 5. The driving device is preferably an electric push rod 27.

[0026] The embodiment of the present invention can control the extrusion push plate 25 to slide toward the hose 5 to achieve the effect of squeezing the hose 5, so that the transported medium is blocked by the squeezed hose 5, reducing the squeezing of the inside of the valve body, so that the valve core ball 11 can block the flow of the medium stably, and will not cause a large pressure on the valve core ball 11, so that the valve core ball 11 has a long service life and a good effect of blocking the flow of the medium. The overall stability of the device can be adjusted, so that the device is not prone to leakage when blocking the internally transported medium.

[0027] In some embodiments, in order to prevent the two ends of the hose 5 (connected to the rigid structure, which is the fixed connection flange 9 hereinafter) from being damaged when squeezed, an extrusion reserve is set for the hose 5, that is, when the hose 5 is squeezed and deformed, the reserve can compensate for the movement caused by its deformation, thereby preventing the two ends of the hose 5 from moving.

[0028] In some embodiments, the pressure loading device 16 includes a spring 21, and multiple springs 21 are arranged on the outside of the inner valve cover 22. One end of the spring 21 abuts against the outer wall of the inner valve cover 22, and the other end abuts against a limit surface. The spring 21 is always in a compressed state.

[0029] This embodiment applies elastic pressure to the inner valve cover 22 through the spring 21, which has low cost and high feasibility.

[0030] In some embodiments, the pressure loading device 16 also includes a mounting ring 20; an annular end surface is constructed at the valve port of the inner valve cover 22, and the mounting ring 20 is installed in the extension tube 8. A plurality of springs 21 are sandwiched between the mounting ring 20 and the annular end surface, and the end of the mounting ring 20 facing the annular end surface is the limiting surface.

[0031] This embodiment realizes the installation of the spring 21 .

[0032] In some embodiments, the inner valve cover 22 is made of duplex stainless steel, and a corrosion-resistant layer is disposed on the outer surface of the inner valve cover 22 , so that the inner valve cover 22 has a long service life.

[0033] In some embodiments, the outer valve body 4 is a split structure, and the two split parts are fastened together and fixedly connected by bolts 15 to facilitate inspection and replacement of the internal structure of the outer valve body 4.

[0034] In some embodiments, the extension tube 8 is divided into two sections, one section is a hose 5 and the other section is a rigid tube 7 . One end of the rigid tube 7 is connected to the valve port and the other end is connected to the hose 5 . The mounting ring 20 is installed in the rigid tube 7 .

[0035] The mounting ring 20 in this embodiment is installed in the rigid tube. Specifically, the pressure loading device 16 also includes a fixed connecting ring 18 and a plurality of fixed support columns 19. The fixed connecting ring 18 is fixed to one end of the rigid tube 7 away from the valve port by bolts 15. One end of the fixed support column 19 is fixedly connected to the fixed connecting ring 18, and the other end is fixedly connected to the mounting ring 20.

[0036] In some embodiments, a fixed connection plate 14 is provided at one end of the rigid tube 7 away from the valve port, and a fixed connection flange 9 is fixedly connected to one end of the hose 5 . The fixed connection flange 9 and the fixed connection plate 14 are fixedly connected by bolts 15 .

[0037] In some embodiments, the embodiments of the present invention further include a base 6, and the pressure loading device 16 and the outer valve body 4 are fixedly arranged on the base 6. Specifically, an electric push rod 27 and an extrusion push plate 25 are respectively arranged on both sides of the hose 5, and a groove-shaped structure is arranged on the side of the extrusion push plate 25 facing the hose 5, and the groove-shaped structure matches the cross-sectional profile of the hose 5. The electric push rod 27 is fixedly arranged on the base 6, and the extrusion push plate 25 is slidably arranged on the base 6. The electric push rod 27 pushes the extrusion push plate 25 to approach and move away from the hose 5 to achieve the purpose of extruding and releasing the hose 5.

[0038] In some embodiments, a pressure relief valve 12 is provided on the extension pipe 8 on the water inlet direction side of the valve port, and the pressure relief valve 12 is connected to a delivery pressure relief hose 3 .

[0039] In this embodiment, when the pressure inside the extension tube 8 increases and reaches a set threshold, the pressure relief valve 12 opens, so that the transported medium can be discharged through the transport pressure relief hose 3 to assist in the discharge and reduce the pressure, so that the pressure inside the valve body is within a suitable range, which can not only protect the valve core ball 11 but also prevent leakage and improve the sealing performance during the use of the device.

[0040] In some embodiments, the middle portion of the base 6 is used to support the outer valve body 4 . A supporting frame 17 is disposed on the outer valve body 4 , and the bottom of the supporting frame 17 is against the upper surface of the middle portion of the base 6 .

[0041] In some embodiments, an angle sensor 10 and a controller are disposed on the rotating shaft, and the controller, the angle sensor 10 and the pressure loading device 16 are all in communication connection.

[0042] In this embodiment, when the valve core ball 11 is rotated to adjust the opening and closing by twisting the hand wheel 2, the angle sensor 10 can detect the rotation angle of the valve core ball 11. When it is detected that the valve core ball 11 is in the valve closing state, the angle sensor 10 can transmit the detected information to the inside of the controller and signal receiver set on the electric push rod 27 to control the operation of the electric push rod 27. The running electric push rod 27 can control the extrusion push plate 25 to slide along the base 6 and squeeze the middle part of the hose 5, so that the transported medium is blocked by the squeezed hose 5, reducing the squeezing of the valve body and the inside of the rigid tube 7, so that the valve core ball 11 blocks the medium flow stably, and will not cause a large pressure on the valve core ball 11, so that the valve core ball 11 has a long service life and a good effect of blocking the flow of the medium. The overall stability of the device can be adjusted, so that the device is not prone to leakage when blocking the internally transported medium.

[0043] The working principle of the ball valve provided in the embodiment of the present invention is as follows: during use, the fixed mounting base 28 can be fixed at a specified position through the fixed mounting hole 29, so that the device can be fixedly installed and used, and the conveying pipe body can be fixedly connected to the two ends of the device through the fixed connecting flange 9. The flowing medium is conveyed to the inside of the outer valve body 4 through an extension pipe 8, and then discharged from the extension pipe 8 on the other side. The rotation of the valve core ball 11 inside the inner valve cover 22 can be controlled by rotating the hand wheel 2 to adjust and control the closed and open states (opening degree), and when the valve core ball 11 is rotated to seal the valve port, the valve core ball 11 is tightly fitted with the inner valve cover 22, and the edge of the inner valve cover 22 is connected to the extension pipe 8 and the outer valve body 4. The inner valve cover 22 is tightly fitted together, so that the valve core ball 11 can seal the extension tube 8 and the outer valve body 4, and the spring 21 arranged at the end of the inner valve cover 22 can automatically adjust the position of the inner valve cover 22 and the strength of the fit with the outer wall of the valve core ball 11, and also ensure that the inner valve cover 22 can always fit with the valve core ball 11 when the valve core ball 11 is repeatedly rotated, to prevent the presence of a gap at the position of the valve core ball 11 and the connection end of the extension tube 8 and the outer valve body 4. During repeated use, the device has a good sealing and blocking effect and will not leak, and the pressure loading device 16 can be easily taken out from the inside of the rigid tube 7 and the outer valve body 4, which is convenient for replacement, maintenance and adjustment. It has an excellent effect of blocking the conveying medium, especially in the process of high-temperature and high-pressure transportation.

[0044] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A ball valve, characterized in that: include: Outer valve body; Two inner valve covers, the two inner valve covers are arranged oppositely in the outer valve body, a valve cavity is formed between the two inner valve covers, and corresponding valve ports are arranged on the two inner valve covers and the outer valve body; A valve core ball, the valve core ball is rotatably disposed in the valve cavity around a rotation axis and is in contact with the two inner valve covers; A hand wheel, arranged on the outside of the outer valve body and fixedly connected to the valve core ball through a rotating shaft; The pressure loading device is configured to apply elastic pressure toward the valve core ball to the two inner valve covers.

2. The ball valve according to claim 1, characterized in that: It also includes an extrusion device and two extension tubes, one end of the two extension tubes is respectively connected to the valve ports of the two inner valve covers, at least a portion of each of the extension tubes is a hose, and the extrusion device is constructed to extrude the hose to reduce the cross-sectional area of ​​at least a portion of the hose.

3. The ball valve according to claim 2, characterized in that: The squeezing device comprises a driving device and a squeezing push plate. Corresponding squeezing push plates are arranged on both sides of each hose. The driving device can drive the squeezing push plates on both sides to move closer to and away from each other to squeeze and release the hose.

4. The ball valve according to claim 3, characterized in that: The pressure loading device comprises a spring, and a plurality of the springs are arranged on the outer side of the inner valve cover. One end of the spring abuts against the outer wall of the inner valve cover, and the other end abuts against a limit surface. The spring is always in a compressed state.

5. The ball valve according to claim 4, characterized in that: The pressure loading device also includes a mounting ring; an annular end surface is constructed at the valve port of the inner valve cover, the mounting ring is installed in the extension tube, a plurality of springs are sandwiched between the mounting ring and the annular end surface, and the end of the mounting ring facing the annular end surface is the limiting surface.

6. The ball valve according to claim 5, characterized in that: The extension pipe is divided into two sections, one section is the soft tube, and the other section is a rigid tube. One end of the rigid tube is connected to the valve port, and the other end is connected to the soft tube. The mounting ring is installed in the rigid tube.

7. The ball valve according to claim 6, characterized in that: The pressure loading device includes a fixed connecting ring and a plurality of fixed supporting columns. The fixed connecting ring is fixed to one end of the rigid tube away from the valve port by bolts. One end of the fixed supporting column is fixedly connected to the fixed connecting ring, and the other end is fixedly connected to the mounting ring.

8. The ball valve according to claim 7, characterized in that: A fixed connection plate is arranged at one end of the rigid tube away from the valve port, a fixed connection flange is fixedly connected to one end of the flexible pipe, and the fixed connection flange and the fixed connection plate are fixedly connected by bolts.

9. The ball valve according to claim 2, characterized in that: It also includes a base, and the pressure loading device and the outer valve body are fixedly arranged on the base; a pressure relief valve is arranged on the extension pipe on the side of the water inlet direction of the valve port, and the pressure relief valve is connected to a delivery pressure relief hose.

10. The ball valve according to claim 1, characterized in that: An angle sensor and a controller are arranged on the rotating shaft, and the controller is communicatively connected with the angle sensor and the pressure loading device.

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