Integrated three-ball hydraulic ball valve

Abstract

The present invention relates to an integrated three-ball hydraulic control ball valve, which adopts a three-ball structure and is provided with a hydraulic control system, wherein a slurry discharge channel and a No. 1 water inlet channel are arranged in parallel in a valve body, and the No. 2 water inlet channel is arranged vertically between the No. 1 water inlet channel and the slurry discharge channel; the ball cores include a No. 1 ball core, a No. 2 ball core and a No. 3 ball core, and the hydraulic control system includes a hydraulic controller, an oil cylinder and a hydraulic drive device, and the hydraulic drive device includes a cylinder body, a piston and a bent rod, and the cylinder body is provided with a cylinder cavity and a piston cavity; the valve stems of the three ball cores are respectively connected with the hydraulic drive device; a No. 1 oil pump and a No. 2 oil pump are arranged in the oil cylinder, and the piston cavities of the hydraulic drive devices of the No. 1 ball core and the No. 2 ball core and the cylinder cavity of the hydraulic drive device of the No. 3 ball core are connected in parallel to the No. 1 oil pump through an oil pipe, and the cylinder cavities of the hydraulic drive devices of the No. 1 ball core and the No. 2 ball core and the piston cavity of the hydraulic drive device of the No. 3 ball core are connected in parallel to the No. 2 oil pump through an oil pipe.

Description

Technical Field

[0001] The invention relates to the field of valves, and in particular to a ball valve suitable for discharging slurry in a slurry circulation system of a shield machine. Background Art

[0002] With the development of industrial technology, shield machines are widely used in digging urban pipe network tunnels, laying underground pipelines and other convenient projects. During the excavation process, shield machines will produce a large amount of mud. Usually, valves are set in the slurry discharge pipes of the shield machine mud circulation system to control the discharge of mud. During the operation of the shield machine, it is often necessary to stop work for necessary inspections and adjustments. Since the medium is mud, when the shield machine stops working in stages, if the medium in the pipeline does not flow continuously, the mud will solidify and agglomerate in this pipeline and block the pipeline. If the pipeline is long, it will be very difficult to clean and dredge the pipeline when the shield machine works next time. Therefore, in order to ensure the smooth discharge of mud in the entire project, even if the shield machine stops working, water will be continuously injected into the pipeline to continuously flush the slurry discharge pipeline, so that the mud medium in the pipeline can flow continuously and prevent the mud in the pipeline from solidifying and blocking the pipeline. The usual practice is to set up multiple water inlet pipes connected to the slurry discharge pipes, and set up multiple independent ball valves in the pipes to control the connection and closing between each water inlet pipe and the sewage pipe, and always ensure that one water inlet pipe is in a connected state with the sewage pipe. However, since each ball valve is independent, it takes up a large space when installed, and is difficult to install in small projects such as urban underground pipelines. In addition, the opening and closing of the ball valve is manually controlled, which poses a risk of misoperation. In addition, there is uncertainty in the pipelines under construction, and manual operation will increase the safety risk. Summary of the invention

[0003] The purpose of the present invention is to provide an integrated three-ball hydraulically controlled ball valve that can be controlled by a hydraulic system, has a high degree of intelligence, a small installation space, and good safety and reliability in view of the shortcomings of the prior art.

[0004] The integrated three-ball hydraulically controlled ball valve of the present invention is: an integrated three-ball hydraulically controlled ball valve, including a valve body, a ball core, a valve stem, a valve cover, a valve seat and a hydraulic control system, a valve stem is arranged above the ball core, the valve cover is sleeved on the valve stem and seals with the valve stem, the valve cover is fixed to the valve body by bolts, a valve seat is arranged between the ball core and the valve body, and the sealing surface of the ball core and the sealing surface of the valve seat cooperate with each other; mainly, the valve body is provided with a slurry discharge channel, a No. 1 water inlet channel and a No. 2 water inlet channel, the slurry discharge channel is arranged in parallel with the No. 1 water inlet channel, and the No. 2 water inlet channel The water channel is vertically arranged between the No. 1 water inlet channel and the slurry discharge channel; the ball core includes a No. 1 ball core, a No. 2 ball core and a No. 3 ball core, the No. 1 ball core is arranged in the slurry discharge channel, the No. 2 ball core is arranged in the No. 1 water inlet channel, and the No. 3 ball core is arranged in the No. 2 water inlet channel; the hydraulic control system includes a hydraulic controller, an oil cylinder and three hydraulic drive devices, the hydraulic drive device includes a cylinder body, a piston and a bent rod, the piston is arranged in the cylinder body and is sealed with the inner wall of the cylinder body, a cylinder cavity is formed between the lower end of the piston and the cylinder body, and the cylinder cavity A cylinder cavity connection port connected to the outside is provided on one side; a sealing cover is provided at the opening at the upper end of the cylinder body, a piston cavity is formed between the piston, the cylinder body and the sealing cover, and a piston cavity connection port connected to the outside is provided on one side of the piston cavity; the upper connecting rod head at the upper end of the piston is connected to one end of the bent rod, and the other end of the bent rod is fixedly connected to the valve stem; the hydraulic drive device is fixedly installed on the valve body through the lower connecting rod head; the valve stems of the No. 1 ball core, No. 2 ball core and No. 3 ball core are respectively connected to a corresponding hydraulic drive device; the oil cylinder is provided with a No. 1 oil pump and a No. 2 oil pump. The control signal input ends of the oil pump, No. 1 oil pump and No. 2 oil pump are respectively connected to the hydraulic controller; the piston chamber connecting port of the hydraulic drive device of the No. 1 ball core, the piston chamber connecting port of the hydraulic drive device of the No. 2 ball core and the cylinder chamber connecting port of the hydraulic drive device of the No. 3 ball core are connected in parallel to the No. 1 oil pump through an oil pipe, and the cylinder chamber connecting port of the hydraulic drive device of the No. 1 ball core, the cylinder chamber connecting port of the hydraulic drive device of the No. 2 ball core and the piston chamber connecting port of the hydraulic drive device of the No. 3 ball core are connected in parallel to the No. 2 oil pump through an oil pipe.

[0005] Furthermore, a limit device is provided on one side of the cylinder body of the hydraulic drive device, and the limit device includes a limit switch, a scale and a telescopic rod. One end of the telescopic rod is fixed to the outer wall of the cylinder body, the telescopic section of the telescopic rod is connected to the piston, the middle section of the telescopic rod is provided with a scale, a slidable limit switch is provided on the scale, the telescopic section of the telescopic rod is provided with a feedback point that can contact the limit switch, and a circuit is provided between the limit switch and the hydraulic controller.

[0006] Furthermore, a sealing ring is provided at the bottom end of the piston of the hydraulic drive device.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: three ball cores are arranged in one valve body, and one valve realizes the control function of connecting and closing multiple pipelines with each other that can only be achieved by a combination of multiple independent ball valves, and it is small in size and easy and quick to install; at the same time, the operation of the oil pump is controlled by the hydraulic intelligent system, so that the automatic opening and closing of the valve can be realized, manual operation can be reduced, construction risks can be reduced, and safety performance can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the installation structure of the hydraulic drive device and the ball core of the present invention.

[0009] Figure 2 It is a schematic diagram of the internal channel structure of the valve body of the present invention.

[0010] Figure 3 It is a structural schematic diagram of the hydraulic drive device of the present invention.

[0011] Figure 4 It is a schematic diagram of the structure of the hydraulic control system of the present invention.

[0012] In the figure: 1 valve body, 2 hydraulic drive device, 201 cylinder cavity connection port, 202 cylinder body, 203 piston, 204 piston cavity connection port, 205 sealing cover, 206 upper connecting rod head, 207 bending rod, 208 lower connecting rod, 209 sealing ring, 210 telescopic rod, 211 limit switch, 212 scale, 213 piston cavity, 214 cylinder cavity, 3 No. 1 ball core, 4 No. 2 ball core, 5 No. 3 ball core, 6 valve stem, 7 No. 1 water inlet channel, 8 No. 2 water inlet channel, 9 slurry discharge channel, 10 oil cylinder, 11 hydraulic controller, 12 No. 1 oil pump, 13 No. 2 oil pump. DETAILED DESCRIPTION

[0013] The present invention is further described with reference to the accompanying drawings.

[0014] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only simplified descriptions for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0015] like Figure 1-Figure 4The integrated three-ball hydraulically controlled ball valve shown comprises a valve body 1, a ball core, a valve stem 6, a valve cover, a valve seat and a hydraulic control system. A valve stem 6 is arranged above the ball core, the valve cover is sleeved on the valve stem 6 and seals with the valve stem 6, the valve cover is fixed to the valve body 1 by bolts, a valve seat is arranged between the ball core and the valve body 1, and the sealing surface of the ball core and the sealing surface of the valve seat cooperate with each other; the valve body 1 is provided with a slurry discharge channel 9, a No. 1 water inlet channel 7 and a No. 2 water inlet channel 8, the slurry discharge channel 9 is arranged in parallel with the No. 1 water inlet channel 7, and both channels are connected to the gathering place of the silt excavated by the shield machine, and the No. 2 water inlet channel 8 is vertically arranged between the No. 1 water inlet channel 7 and the slurry discharge channel 9; the ball core comprises Ball core No. 1 3, ball core No. 2 4 and ball core No. 3 5, ball core No. 1 3 is arranged in the slurry discharge channel 9, which can control the connection between the slurry discharge channel 9 and the sediment gathering place, ball core No. 2 4 is arranged in the water inlet channel No. 1 7, which can control the connection between the water inlet channel No. 1 7 and the sediment gathering place, ball core No. 3 5 is arranged in the water inlet channel No. 2 8, which can control the connection between the water inlet channel No. 2 8 and the slurry discharge channel 9, the opening and closing states of ball core No. 1 3 and ball core No. 2 4 are consistent, and the opening and closing states of ball core No. 3 5 are opposite to those of ball core No. 1 3 and ball core No. 2 4; the hydraulic control system includes a hydraulic controller 11, an oil cylinder 10 and three hydraulic drive devices 2, and the hydraulic drive device 2 is connected by a lower connecting rod The head 208 is fixed on the outer wall of the valve body 1. The hydraulic drive device 2 includes a cylinder body 202, a piston 203 and a bent rod 207. The piston 203 is arranged in the cylinder body 202 and is sealed with the inner wall of the cylinder body 202. A cylinder cavity 214 is formed between the lower end of the piston 203 and the cylinder body 202. A cylinder cavity connection port 201 communicating with the outside is provided on one side of the cylinder cavity 214. A sealing cover 205 is provided at the opening of the upper end of the cylinder body 202. The outer peripheral wall of the sealing cover 205 is threadedly sealed with the inner wall of the cylinder body 202. A piston cavity 213 is formed between the piston 203, the cylinder body 202 and the sealing cover 205. A piston cavity connection port 201 communicating with the outside is provided on one side of the piston cavity 214. The connecting rod head 206 at the upper end of the piston 203 is connected to one end of the bent rod 207 and fixed by bolts and nuts. The other end of the bent rod 207 is fixedly connected to the valve stem 6. The bent rod 207 is provided with a connection port matching the valve stem 6. After being fixed with the valve stem 6, the valve stem 6 can be driven to rotate; the valve stems 6 of the No. 1 ball core 3, the No. 2 ball core 4, and the No. 3 ball core 5 are respectively connected to a corresponding hydraulic drive device 2; the oil cylinder 10 is provided with a No. 1 oil pump 12 and a No. 2 oil pump 13, and the control signal input ends of the No. 1 oil pump 12 and the No. 2 oil pump 13 are respectively connected to the hydraulic controller 11, and the operating state of the oil pump is controlled by the control program in the hydraulic controller 11;The piston chamber connecting port 204 of the hydraulic driving device 2 of the No. 1 ball core 3, the piston chamber connecting port 204 of the hydraulic driving device 2 of the No. 2 ball core 4 and the cylinder chamber connecting port 201 of the hydraulic driving device 2 of the No. 3 ball core 5 are connected in parallel to the No. 1 oil pump 12 through an oil pipe, and the cylinder chamber connecting port 201 of the hydraulic driving device 2 of the No. 1 ball core 3, the cylinder chamber connecting port 201 of the hydraulic driving device 2 of the No. 2 ball core 4 and the piston chamber connecting port 204 of the hydraulic driving device 2 of the No. 3 ball core 5 are connected in parallel to the No. 2 oil pump 13 through an oil pipe. The three ball cores are synchronized through their respective hydraulic controllers 11. When the shield machine is in excavation operation, the hydraulic controller 11 inputs an oil pumping command to the No. 1 oil pump 12 and an oil delivery command to the No. 2 oil pump 13. The oil in the cylinder chamber 214 of the No. 1 ball core 3 and the No. 2 ball core 4 increases, and the oil in the piston chamber 213 decreases. The piston 203 extends out of the cylinder body 202, driving the bending rod 207 to move, thereby driving the valve stem 6 to rotate, so that the No. 1 ball core 3 and the No. 2 ball core 4 are in an open state, the oil in the cylinder chamber 214 of the No. 3 ball core 5 decreases, and the oil in the piston chamber 213 increases. The piston 203 retracts into the cylinder body 202, so that the No. 3 ball core 5 is in a closed state. At this time, the No. 1 water inlet channel 7 and the slurry discharge channel 9 are both in a through state, and the No. 2 water inlet channel 8 is in a cut-off state. Water flows through the No. 1 water inlet channel 7 into the sediment gathering place to form mud, and then through the slurry discharge channel Channel 9 is discharged; when the shield machine is suspended for maintenance, the hydraulic controller 11 inputs the oil delivery command to the No. 1 oil pump 12 and the oil pumping command to the No. 2 oil pump 13. The oil in the cylinder chamber 214 of the hydraulic drive device 2 of the No. 1 ball core 3 and the No. 2 ball core 4 decreases, and the oil in the piston chamber 213 increases. The piston 203 retracts the rod body, drives the valve stem 6 to rotate through the bent rod 207, and the No. 1 ball core 3 and the No. 2 ball core 4 are closed, disconnecting the No. 1 water inlet channel 7, the slurry discharge channel 9 and the sediment gathering place. The oil in the cylinder chamber 214 of the No. 3 ball core 5 increases, and the oil in the piston chamber 213 decreases. The piston 203 extends out of the cylinder body 202, controls the No. 3 ball core 5 to open, and connects the No. 2 water inlet channel 8 with the slurry discharge channel 9. The water source flows into the slurry discharge channel 9 through the No. 2 water inlet channel 8, ensuring the continuous flow of the medium in the slurry discharge channel 9, and preventing the soil from drying and solidifying and blocking the entire channel. ;

[0016] A limit device is provided on one side of the cylinder 202 of the hydraulic drive device 2, and the limit device includes a limit switch 211, a scale 212 and a telescopic rod 210. One end of the telescopic rod 210 is fixed on the outer wall of the cylinder 202, the telescopic section of the telescopic rod 210 is connected to the piston 203, a scale 212 is provided in the middle section of the telescopic rod 210, a slidable limit switch 211 is provided on the scale 212, a feedback point that can contact the limit switch 211 is provided on the telescopic section of the telescopic rod 210, and a line is provided between the limit switch 211 and the hydraulic controller 11. The position of the limit switch 211 can be adjusted according to the scale 212 according to the required working conditions. When the feedback point on the telescopic section of the telescopic rod 210 contacts the limit switch 211, a feedback signal is fed back to the hydraulic controller 11 through the line. After receiving the feedback signal, the hydraulic controller 11 will stop the operation of the oil pump to keep the movement of the piston 203 within the specified range to prevent over-limit and affect the opening and closing of the valve.

[0017] A sealing ring 209 is provided at the bottom end of the piston 203 of the hydraulic drive device 2 to achieve multiple sealing and ensure the sealing isolation between the cylinder cavity 214 and the piston cavity 213.

[0018] The present invention is described in detail above through the embodiments, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. Any changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An integrated three-ball hydraulically controlled ball valve comprises a valve body (1), a ball core, a valve stem (6), a valve cover, a valve seat and a hydraulic control system, wherein a valve stem (6) is provided above the ball core, the valve cover is sleeved on the valve stem (6) and is sealed with the valve stem (6), the valve cover is fixed to the valve body (1) by bolts, a valve seat is provided between the ball core and the valve body (1), and a sealing surface of the ball core and a sealing surface of the valve seat are matched with each other; Its characteristics are: The valve body (1) is provided with a slurry discharge channel (9), a No. 1 water inlet channel (7) and a No. 2 water inlet channel (8) inside. The slurry discharge channel (9) is arranged in parallel with the No. 1 water inlet channel (7), and the No. 2 water inlet channel (8) is arranged vertically between the No. 1 water inlet channel (7) and the slurry discharge channel (9). The ball core comprises a No. 1 ball core (3), a No. 2 ball core (4) and a No. 3 ball core (5). The No. 1 ball core (3) is arranged in the slurry discharge channel (9), the No. 2 ball core (4) is arranged in the No. 1 water inlet channel (7), and the No. 3 ball core (5) is arranged in the No. 2 water inlet channel (8). The hydraulic control system comprises a hydraulic controller (11), an oil cylinder (10) and a No. 3 ball core (5). A hydraulic drive device (2) is provided, the hydraulic drive device (2) being fixedly mounted on the outer wall of the valve body (1) via a lower connecting rod head (208), the hydraulic drive device (2) comprising a cylinder body (202), a piston (203) and a bent rod (207), the piston (203) being arranged in the cylinder body (202) and sealingly cooperating with the inner wall of the cylinder body (202), a cylinder cavity (214) being formed between the lower end of the piston (203) and the cylinder body (202), a cylinder cavity connection port (201) communicating with the outside being provided on one side of the cylinder cavity (214); a sealing cover (205) is provided at the upper opening of the cylinder body (202), the piston (203), the cylinder body (202) and the like. A piston chamber (213) is formed between the sealing covers (205), and a piston chamber connection port (204) communicating with the outside is provided on one side of the piston chamber (213); an upper connecting rod head (206) at the upper end of the piston (203) is connected to one end of a bent rod (207), and the other end of the bent rod (207) is fixedly connected to a valve stem (6); the valve stems (6) of the No. 1 ball core (3), the No. 2 ball core (4), and the No. 3 ball core (5) are respectively connected to a corresponding hydraulic drive device (2); a No. 1 oil pump (12) and a No. 2 oil pump (13) are provided in the oil cylinder (10), and the control signal input ends of the No. 1 oil pump (12) and the No. 2 oil pump (13) are respectively connected to the hydraulic control The piston chamber connection port (204) of the hydraulic drive device (2) of the first ball core (3), the piston chamber connection port (204) of the hydraulic movable device of the second ball core (4) and the cylinder chamber connection port (201) of the hydraulic drive device (2) of the third ball core (5) are connected in parallel to the first oil pump (12) through oil pipes; the cylinder chamber connection port (201) of the hydraulic drive device (2) of the first ball core (3), the cylinder chamber connection port (201) of the hydraulic movable device of the second ball core (4) and the piston chamber connection port (204) of the hydraulic drive device (2) of the third ball core (5) are connected in parallel to the second oil pump (13) through oil pipes.

2. The integrated three-ball hydraulically controlled ball valve according to claim 1, Its characteristics are: A limit device is provided on one side of the cylinder body (202) of the hydraulic drive device (2), the limit device comprising a limit switch (211), a scale (212) and a telescopic rod (210); one end of the telescopic rod (210) is fixed to the outer wall of the cylinder body (202); the telescopic section of the telescopic rod (210) is connected to the piston (203); the middle section of the telescopic rod (210) is provided with a scale (212); the scale (212) is provided with a slidable limit switch (211); the telescopic section of the telescopic rod (210) is provided with a feedback point that can contact the limit switch (211); and a circuit is provided between the limit switch (211) and the hydraulic controller (11).

3. According to claim 1 or 2, the integrated three-ball hydraulically controlled ball valve, Its characteristics are: A sealing ring (209) is provided at the bottom end of the piston (203) of the hydraulic drive device (2).

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