High pressure differential water hammer ball valve

Abstract

The application provides a high-pressure-difference waterproof hammer ball valve, which comprises a ball valve body, a spherical valve core installed in the ball valve body, and a valve core handle for controlling rotation of the spherical valve core, a first through port and a second through port are formed on the surface of the spherical valve core, the guide direction of the second through port is crossed with the guide direction of the first through port, and the opening size of the second through port is smaller than the opening size of the first through port; an inclined slow-closing device is installed on the upper end of the ball valve body, the slow-closing device comprises a slow-closing ball body matched with the second through port, and a control device capable of elastically accommodating medium is installed on the side wall of the ball valve body. The ball valve can realize automatic delayed closing, and the structure is ingenious and automatic, so that the influence of the water hammer phenomenon on the valve body is reduced, and the work burden of the operator is reduced.

Description

Technical Field

[0001] This invention relates to the field of valve body technology, and in particular to a high-pressure differential water-resistant hammer ball valve. Background Technology

[0002] Ball valves open and close by rotating an internal spherical valve core; they have low flow resistance and are widely used.

[0003] Ball valves typically open and close by rotating 90°. The rotation path is short. However, during the closing process, especially in pipelines with high pressure differentials, the ball valve core may suddenly close, causing the internal conveying medium to stop abruptly. The inertia of the conveying medium and the impact of the high pressure differential can damage the valve body and the pipeline.

[0004] Some ball valves achieve slow closure during the closing process of the ball valve core by installing a connecting pipe in the pipeline, so as to gradually reduce the flow rate of the medium and reduce the water hammer phenomenon caused by the sudden closure of the ball valve core. However, the existing structure requires a dedicated connecting pipe for connection, which increases the sealing requirements of the pipeline connection. At the same time, the overall slow closure control needs to be controlled separately and monitored and adjusted in real time, which prolongs the overall closing time of the ball valve and increases the workload of the operator. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a high-pressure differential water hammer ball valve. This ball valve can achieve automatic delayed closure, with an ingenious and automatic structure, reducing the impact of water hammer on the valve body while also reducing the workload of operators.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] A high-pressure differential water hammer ball valve includes a ball valve body, a spherical valve core installed inside the ball valve body, and a valve core handle for controlling the rotation of the spherical valve core. The surface of the spherical valve core has a first port and a second port, the conduction direction of the second port intersecting the conduction direction of the first port, and the opening size of the second port being smaller than that of the first port. An inclined slow-closing device is installed at the upper end of the ball valve body. The slow-closing device includes a slow-closing ball adapted to the second port. A control device capable of elastically accommodating the medium is installed on the side wall of the ball valve body. After the spherical valve core rotates and closes, the control device controls the slow-closing ball to move towards the second port to complete the slow-closing seal. Through the above design, while immediately closing the low-pressure pipeline side, it can also delay the closing of the high-pressure pipeline side, avoiding water hammer caused by sudden closure inside the pipeline. This ball valve is suitable for installation in high-pressure differential transmission pipelines to prevent water hammer from damaging the transmission pipeline, valve body, etc.

[0008] Preferably, the second port is installed on the upper end of the side wall of the spherical valve core, and the tilting direction of the second port is consistent with the tilting angle of the slow-closing device; through the above design, the structure of the slow-closing device can be easily installed, and the sealing performance of the slow-closing ball after it moves and fits with the second port can be guaranteed.

[0009] Preferably, the slow-closing device includes a slow-closing mounting cylinder, a slow-closing positioning plug that slides and seals the inner wall of the slow-closing mounting cylinder, a slow-closing positioning rod that is fixedly connected to the side wall of the slow-closing positioning plug, the end of the slow-closing positioning rod passing through the ball valve body and fixedly connected to the slow-closing ball, an elastic element sleeved on the outer side of the slow-closing positioning rod, and a slow-closing chamber formed between the slow-closing positioning plug and the inner wall of the slow-closing mounting cylinder. A slow-closing medium is introduced into the slow-closing chamber to control the movement of the slow-closing ball towards the second port to complete the slow-closing seal. Through the above structural design, the slow-closing positioning plug can be hydraulically pushed to move the slow-closing ball towards the second port. The overall control structure is simple and compact, has a long stroke, and is reliable in use.

[0010] Preferably, the control device includes a control mounting cylinder, which is connected to the inside of the ball valve body. A first control piston is slidably connected to the inner wall of the control mounting cylinder. A pumping assembly is disposed between the first control piston and the inner wall of the control mounting cylinder. The pumping assembly is connected to the slow-closing chamber through a first conductive pipe. During the movement of the first control piston, the pumping assembly is squeezed to introduce a slow-closing medium into the slow-closing chamber. Through the above structural design, after the ball valve core rotates, the conveying medium in the high-pressure pipeline can be transferred to the control mounting cylinder. During the movement of the first control piston, the overall flow velocity is reduced, and the influence of water hammer is reduced. The second port is closed with delay, thereby achieving automatic slow-closing control of the pipeline and automatic conduction control of the overall structure to stabilize the overall structure.

[0011] Preferably, an adjustment component located outside the first control piston is installed inside the control mounting cylinder, and the moving speed of the first control piston is adjusted by adjusting the adjustment component; the above design is to meet the needs of pipelines with different pressures and to adapt to different conveying media.

[0012] Preferably, the adjusting assembly includes a first adjusting sleeve fixedly connected to the first control piston, an adjusting control rod slidably connected to the inner wall of the first adjusting sleeve, the adjusting control rod passing through the control mounting cylinder and threadedly connected thereto, and an elastic component provided inside the first adjusting sleeve.

[0013] Preferably, a second control piston is slidably connected to the inner wall of the control mounting cylinder, and the pumping assembly is located between the first control piston and the second control piston. The pumping time limit of the pumping assembly is controlled by adjusting the position of the second control piston.

[0014] Preferably, the second control piston sidewall is rotatably connected to a clamping assembly, the end of which passes through the control mounting cylinder and is threadedly connected thereto.

[0015] Preferably, the control mounting cylinder is connected to a pressure relief container through a second conductive pipe, and control valve bodies are respectively installed inside the second conductive pipe and the first conductive pipe.

[0016] The beneficial effects of this invention are as follows:

[0017] By setting up intersecting second and first ports, this ball valve can immediately shut off the low-pressure side of the pipeline while delaying the closure of the high-pressure side, thus avoiding water hammer caused by sudden closure inside the pipeline. This ball valve is suitable for installation in high-pressure differential pipelines to prevent water hammer from damaging the pipeline and valve body. The ball valve can achieve automatic delayed closure, and its ingenious automatic structure reduces the workload of operators. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a top view of the structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the slowly closing sphere in its contracted state according to the present invention.

[0021] Figure 4 For the present invention Figure 3 A magnified structural diagram at point A.

[0022] Figure 5 This is a schematic diagram of the extended state of the slowly closing sphere of the present invention.

[0023] Figure 6 For the present invention Figure 5 A magnified structural diagram at point B.

[0024] Figure 7 This is a three-dimensional structural diagram of the spherical valve core of the present invention.

[0025] Figure 8 This is a schematic diagram of the internal structure of the control device of the present invention.

[0026] In the diagram: 100, ball valve body; 110, valve core handle; 120, spherical valve core; 121, first port; 122, second port; 123, rotary mounting base; 200, slow-closing device; 210, slow-closing mounting cylinder; 220, slow-closing positioning plug; 230, slow-closing positioning rod; 240, elastic element; 250, slow-closing ball; 260, connecting joint; 270, slow-closing chamber; 300, control device; 310, control mounting cylinder; 311, second connecting pipeline; 320, first control piston; 330, pump assembly; 331, first connecting pipeline; 340, clamping assembly; 350, second control piston; 360, adjusting assembly; 361, first adjusting sleeve; 362, adjusting control rod. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] See attached document Figure 1 -Appendix Figure 8 A high-pressure differential water hammer ball valve includes a ball valve body 100, a spherical valve core 120 installed inside the ball valve body 100, and a valve core handle 110 for controlling the rotation of the spherical valve core 120. The operator can rotate the spherical valve core 120 from the outside through the valve core handle 110 to open and close the medium flow passage inside the ball valve body 100. A first port 121 and a second port 122 are opened on the surface of the spherical valve core 120. The conduction direction of the second port 122 intersects the conduction direction of the first port 121, and the opening size of the second port 122 is smaller than the opening size of the first port 121.

[0029] The ball valve core 120 is divided into a main transverse passage for media flow and a branch passage for buffering and preventing water pooling. When the ball valve core 120 is rotated into the open state, the first port 121 on the surface of the ball valve core 120 is opposite to the main passage, allowing media to flow through. At the same time, the second port 122 rotates to one side of the inner wall, at which time the second port 122 and the branch passage are in a closed state. When the ball valve core 120 is rotated into the closed state, the first port 121 rotates to one side of the inner wall, at which time the ball valve core 120 can close the main passage to achieve closure of the low-pressure pipeline. At the same time, the second port 122 is connected to the high-pressure pipeline. At this time, the media in the high-pressure pipeline flows through the second port 122 into the first port 121. During this process, the flow rate slows down. Finally, by closing the smaller second port 122, the entire ball valve core 120 is sealed to ensure the overall sealing performance of the ball valve.

[0030] Through the above design, while being able to immediately shut off the low-pressure pipeline side, the high-pressure pipeline side can be shut off with a delayed shutdown, avoiding water hammer caused by sudden closure inside the pipeline. This ball valve is suitable for installation in high-pressure differential transmission pipelines to prevent water hammer from damaging the transmission pipeline, valve body, etc.

[0031] To achieve the slow-closing function of the second port 122, an inclined slow-closing device 200 is installed on the upper end of the ball valve body 100. The slow-closing device 200 includes a slow-closing ball 250 adapted to the second port 122. A control device 300 capable of elastically accommodating the medium is installed on the side wall of the ball valve body 100. After the ball valve core 120 is rotated and closed, the control device 300 controls the slow-closing ball 250 to move towards the second port 122 to complete the slow-closing seal. After the ball valve core 120 is rotated and closed, the control medium in the control device 300 is squeezed into the slow-closing device 200, pushing the slow-closing device 200 to its end. The slow-closing ball 250 moves towards the second port 122. During this process, the gap between the slow-closing ball 250 and the second port 122 gradually decreases. Finally, the slow-closing ball 250 abuts against the surface of the second port 122, completing the closure of the second port 122 and ensuring the overall sealing of the ball valve. At the same time, as the slow-closing ball 250 moves closer to the second port 122, the cross-section through which the medium flows in the pipeline gradually decreases, so as to gradually close the second port 122, avoiding the water hammer phenomenon caused by the instantaneous closure of the ball valve and preventing damage to the inner wall of the pipeline caused by the impact.

[0032] To facilitate the installation of the slow-closing device 200 and ensure the sealing performance of the slow-closing ball 250 after it moves and fits against the second port 122, the second port 122 is installed on the upper end of the side wall of the spherical valve core 120. The inclination direction of the second port 122 is consistent with the inclination angle of the slow-closing device 200. The position of the second port 122 at the upper end is opposite to the direction of movement of the slow-closing device 200. The direction of movement of the slow-closing ball 250 is located on the axis of the second port 122. After the slow-closing ball 250 moves to the surface of the second port 122, it can abut against its surface to ensure the overall sealing performance. The second port 122 has a concave stepped design, and an annular sealing ring is installed on the bottom surface of the step to achieve a soft seal of the slow-closing ball 250 and ensure the sealing performance of the connection. At the same time, the overall structure is concave and is hidden in the internal structure during the rotation of the spherical valve core 120, so as not to affect the overall rotation of the spherical valve core 120.

[0033] Please refer to the appendix for details. Figure 3 -Appendix Figure 6The slow-closing device 200 here includes a slow-closing mounting cylinder 210. A slow-closing positioning plug 220 is slidably sealed on the inner wall of the slow-closing mounting cylinder 210. A slow-closing positioning rod 230 is fixedly connected to the side wall of the slow-closing positioning plug 220. The end of the slow-closing positioning rod 230 passes through the ball valve body 100 and is fixedly connected to the slow-closing ball 250. An elastic element 240 is sleeved on the outer side of the slow-closing positioning rod 230. A slow-closing chamber 270 is formed between the slow-closing positioning plug 220 and the inner wall of the slow-closing mounting cylinder 210. The slow-closing medium is introduced into the slow-closing chamber 270 to control the movement of the slow-closing ball 250 toward the second port 122 to complete the slow-closing seal.

[0034] Through the above structural design, the slow-closing positioning plug 220 can be hydraulically driven to move the slow-closing ball 250 toward the second port 122. The overall control structure is simple and compact, with a long stroke and reliable operation. The elastic element 240 can be a passivated spring, which can push the slow-closing positioning plug 220 to tend to return to the top. After the medium pressure in the slow-closing chamber 270 decreases, the slow-closing positioning plug 220 and the slow-closing ball 250 are pushed to move toward the top, offset from the second port 122, so as to avoid affecting the rotation and opening of the ball valve core 120.

[0035] To reduce the impact of the slow-closing ball 250 located inside the ball valve body 100 on the flowing medium, reduce the resistance to the flow of the medium, and reduce the wear of the valve body, a hemispherical receiving groove is recessed inside the ball valve body 100, located on the moving path of the slow-closing ball 250. This groove can hide the main body of the slow-closing ball 250 inside, reducing the impact on the normal flow of the medium.

[0036] Please refer to the appendix for details. Figure 8 The control device 300 includes a control mounting cylinder 310, which is connected to the inside of the ball valve body 100. A first control piston 320 is slidably connected to the inner wall of the control mounting cylinder 310. A pumping assembly 330 is provided between the first control piston 320 and the inner wall of the control mounting cylinder 310. The pumping assembly 330 is connected to the slow-closing chamber 270 through a first conductive pipe 331. During the movement of the first control piston 320, the pumping assembly 330 is squeezed to introduce a slow-closing medium into the slow-closing chamber 270.

[0037] The pump assembly 330 here can be a pump telescopic rod structure or an elastic pump bladder with reinforced guidance treatment. The open end of the control mounting cylinder 310 is connected to the inside of the ball valve body 100, specifically, it is in a state of communication with the branch passage. After the ball valve core 120 rotates to the closed state, the conveying medium in the high pressure pipeline can flow through the second port 122 into the ball valve core 120 and connect with the branch passage. During this process, the first control piston 320 can be pushed to move towards the pump assembly 330 to compress the pump assembly 330, so as to deliver the slow-closing medium in the pump assembly 330 to the slow-closing chamber 270, and push the slow-closing positioning plug 220 and the slow-closing ball 250 towards the second port 122 to complete the slow closure at the second port 122.

[0038] Through the above structural design, after the spherical valve core 120 rotates, the conveying medium in the high-pressure pipeline can be transferred to the control mounting cylinder 310. During the process of pushing the first control piston 320 to move, the overall flow velocity is reduced, and the impact of water hammer is reduced. At the same time, the conveying medium can push the first control piston 320 to move, so as to push the slow-closing medium in the pumping assembly 330 into the slow-closing chamber 270, and push the slow-closing ball 250 towards the second port 122 to complete the delayed closure of the second port 122, so as to realize the automatic slow-closing control of the pipeline and the automatic conduction control of the overall structure, so as to stabilize the overall structure control.

[0039] An adjustment component 360 is installed inside the control mounting cylinder 310, located outside the first control piston 320. The adjustment component 360 adjusts the moving speed of the first control piston 320. By controlling the moving speed of the first control piston 320, the contraction speed of the pump assembly 330 can be adjusted, thereby controlling the moving speed of the slow-closing ball 250 to meet the needs of different pressure pipelines and different conveying media.

[0040] As a preferred adjustment method, the adjustment assembly 360 includes a first adjustment sleeve 361 fixedly connected to the first control piston 320. An adjustment control rod 362 is slidably connected to the inner wall of the first adjustment sleeve 361. The adjustment control rod 362 passes through the control mounting sleeve 310 and is threadedly connected to it. An elastic component is provided inside the first adjustment sleeve 361. By rotating the adjustment control rod 362, the compression amount of the elastic component can be adjusted to change the magnitude of the clamping force at the end on the first control piston 320, thereby changing the magnitude of the resistance to the movement of the first control piston 320 and realizing the slow closing control of the first control piston 320. Here, the elastic component is selected as a spring with a built-in guide component to ensure that the elastic resistance increases linearly, thereby reducing the impact on the overall pipeline.

[0041] The aforementioned adjustment component 360 can also be selected as a damping structure to change the friction coefficient during the movement of the first control piston 320, thereby changing the movement speed of the first control piston 320. The above structure is a consumable part and needs to be replaced periodically. It can be selected according to the installation requirements of the valve body.

[0042] A second control piston 350 is slidably connected to the inner wall of the control mounting cylinder 310. The pumping assembly 330 is located between the first control piston 320 and the second control piston 350. By adjusting the position of the second control piston 350, the pumping limit time of the pumping assembly 330 can be controlled. Through the above structural design, the limit time of the pumping assembly 330 being squeezed can be adjusted. By delaying the contact squeezing of the pumping assembly 330, the needs of ball valves of different diameters and pipelines of different media can be met. The flow time of the conveying medium at the second port 122 is extended to reduce the amount of medium in the high-pressure pipeline and reduce the water hammer effect caused by the closure of the second port 122, further ensuring the safety factor of the entire valve body and the entire pipeline.

[0043] A clamping assembly 340 is rotatably connected to the side wall of the second control piston 350. The end of the clamping assembly 340 passes through the control mounting cylinder 310 and is threaded to it. By setting the clamping assembly 340, the operator can easily adjust the position of the second control piston 350 from the outside to adjust it according to the use. The threaded connection adjustment method has high adjustment accuracy and good stability.

[0044] The control mounting cylinder 310 is connected to a pressure relief container via a second connecting pipe 311. Control valves are installed inside both the second connecting pipe 311 and the first connecting pipe 331. After the pump assembly 330 is compressed to its limit, the corresponding control valve in the first connecting pipe 331 can be closed first, and then the corresponding control valve in the second connecting pipe 311 can be opened to lock the position of the slow-closing ball 250. Simultaneously, pressure is released within the control mounting cylinder 310 to prevent the control device 300 from remaining under high pressure, ensuring the stability of the overall structure. Furthermore, after pressure is released within the control mounting cylinder 310, the pressure of the conveying medium in the branch passage decreases. At this time, the slow-closing ball 250 will be affected by the pressure of the conveying medium in the high-pressure pipeline, ensuring a tight fit between the slow-closing ball 250 and the surface of the second port 122, further guaranteeing the sealing effect at the second port 122.

[0045] Working principle: After the spherical valve core 120 rotates from the open state to the closed state, the first port 121 is opposite to the branch passage and the second port 122 is opposite to the main passage. The conveying medium in the high-pressure pipeline flows through the second port 122 into the branch pipeline and finally enters the control device 300, pushing the first control piston 320 to move and squeeze the pump assembly 330. The slow-closing medium in the pump assembly 330 is squeezed into the slow-closing mounting cylinder 210, pushing the slow-closing positioning plug 220 and the slow-closing ball 250 to move outward. The slow-closing ball 250 moves towards the second port 122 to close the second port 122, thereby enhancing the overall sealing performance.

[0046] The slow-closing mounting cylinder 210 can be connected to a separate external pump assembly to increase the pressure in the slow-closing chamber 270, ensuring the stability of the slow-closing ball 250. Furthermore, when the first conductive pipeline 331 is locked, the conveying medium in the control device 300 and the branch pipeline can be discharged to relieve pressure, further ensuring the stability of the slow-closing ball 250.

[0047] During the opening process of the rotating ball valve core 120, the ball valve core 120 is first filled with the delivery medium to maintain the consistency of the pressure inside and outside the slow-closing ball 250. Then, the slow-closing ball 250 is controlled to retract and reset. Finally, the ball valve core 120 is rotated by the valve core handle 110 so that the first port 121 can be aligned with the main passage to complete the normal delivery of the delivery medium inside the ball valve.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-pressure differential water hammer ball valve, comprising a ball valve body (100), a spherical valve core (120) installed inside the ball valve body (100), and a valve core handle (110) for controlling the rotation of the spherical valve core (120), wherein the spherical valve core (120) has a first port (121) and a second port (122) on its surface, characterized in that: The conduction direction of the second port (122) intersects the conduction direction of the first port (121), and the opening size of the second port (122) is smaller than the opening size of the first port (121); The ball valve body (100) is equipped with an inclined slow-closing device (200) at its upper end. The slow-closing device (200) includes a slow-closing ball (250) adapted to the second port (122). The ball valve body (100) is equipped with a control device (300) that can elastically accommodate the medium on its side wall. After the ball valve core (120) is rotated and closed, the control device (300) controls the slow-closing ball (250) to move towards the second port (122) to complete the slow-closing seal; The slow-closing device (200) includes a slow-closing mounting cylinder (210), a slow-closing positioning plug (220) is slidably sealed on the inner wall of the slow-closing mounting cylinder (210), a slow-closing positioning rod (230) is fixedly connected to the side wall of the slow-closing positioning plug (220), the end of the slow-closing positioning rod (230) passes through the ball valve body (100) and is fixedly connected to the slow-closing ball (250), an elastic element (240) is sleeved on the outer side of the slow-closing positioning rod (230), and a slow-closing chamber (270) is formed between the slow-closing positioning plug (220) and the inner wall of the slow-closing mounting cylinder (210). The slow-closing medium is introduced into the slow-closing chamber (270) to control the slow-closing ball (250) to move toward the second port (122) to complete the slow-closing seal. The control device (300) includes a control mounting cylinder (310), which is connected to the inside of the ball valve body (100). A first control piston (320) is slidably connected to the inner wall of the control mounting cylinder (310). A pump assembly (330) is provided between the first control piston (320) and the inner wall of the control mounting cylinder (310). The pump assembly (330) is connected to the slow-closing chamber (270) through a first conductive pipe (331). During the movement of the first control piston (320), the pump assembly (330) is squeezed to introduce a slow-closing medium into the slow-closing chamber (270).

2. The high-pressure differential waterproof hammer ball valve according to claim 1, characterized in that, The second port (122) is installed on the upper end of the side wall of the ball valve core (120), and the tilting direction of the second port (122) is consistent with the tilting angle of the slow closing device (200).

3. The high-pressure differential waterproof hammer ball valve according to claim 1, characterized in that, The control mounting cylinder (310) is equipped with an adjustment component (360) located outside the first control piston (320), and the moving speed of the first control piston (320) is adjusted by the adjustment component (360).

4. A high-pressure differential waterproof ball valve according to claim 3, characterized in that, The adjustment assembly (360) includes a first adjustment sleeve (361) fixedly connected to a first control piston (320). An adjustment control rod (362) is slidably connected to the inner wall of the first adjustment sleeve (361). The adjustment control rod (362) passes through the control mounting cylinder (310) and is threadedly connected to it. An elastic component is provided inside the first adjustment sleeve (361).

5. A high-pressure differential waterproof ball valve according to claim 1, characterized in that, The inner wall of the control mounting cylinder (310) is slidably connected to a second control piston (350). The pumping assembly (330) is located between the first control piston (320) and the second control piston (350). The pumping limit time of the pumping assembly (330) is controlled by adjusting the position of the second control piston (350).

6. A high-pressure differential waterproof ball valve according to claim 5, characterized in that, The second control piston (350) has a clamping assembly (340) rotatably connected to its side wall. The end of the clamping assembly (340) passes through the control mounting cylinder (310) and is threadedly connected to it.

7. A high-pressure differential waterproof ball valve according to claim 1, characterized in that, The control mounting cylinder (310) is connected to a pressure relief container through a second conductive pipe (311), and control valve bodies are respectively installed inside the second conductive pipe (311) and the first conductive pipe (331).

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