Electro-hydraulic control high-temperature and high-pressure coal slurry shearing gate valve

Abstract

The utility model relates to the field of coal slurry shearing gate valves, in particular to an electric hydraulic control high-temperature and high-pressure coal slurry shearing gate valve. The shearing gate valve comprises a valve body, a channel, a valve seat, a gate plate, an electric hydraulic driver, an oil cylinder, a shearing cutting ring and a connecting piece, the valve seat is fixed in the valve body, the valve seat and the gate plate are connected together in a sliding fit mode, the gate plate is connected with a piston rod of the oil cylinder through the connecting piece, a cylinder body of the oil cylinder and the valve body are fixed together, and the channel for coal slurry to pass through is arranged in the valve body. The flashboard penetrates through the channel, an electric hydraulic driver is installed on the valve body and connected with an oil cylinder, a penetrating hole is formed in the flashboard, and a cutting ring cutter is fixed in the penetrating hole. The electric hydraulic driver is matched with the oil cylinder to drive the gate plate with the shearing cutting ring to linearly move along the valve seat, so that high-temperature coal slurry fluid is cut off and opened. The structure is compact, the shearing force is small, the sealing performance is good, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of coal slurry shear gate valves, especially the high-temperature and high-pressure coal slurry shear gate valves controlled by electric-hydraulic. Background Technique

[0002] The high-temperature coal slurry shear gate valve is an industrial valve specially used for dealing with high-temperature coal slurry, and its development background stems from the continuous demands of the energy industry and industrial processes. Coal slurry, namely the slurry formed by mixing coal and water, is widely used in fields such as electric power, metallurgy, and chemical industry due to its high combustion efficiency, less pollution, and convenience in transportation and treatment. However, the viscosity, high hardness, and corrosiveness of high-temperature coal slurry bring huge challenges to transportation and control. The coal slurry transportation system mainly relies on conventional gate valves and ball valves, but these valves are prone to damage under high-temperature and high-pressure conditions and do not have good sealing performance, resulting in frequent leakage and maintenance and being difficult to meet this high-demand operating environment. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is: In order to solve the technical problems described in the background technique, the utility model provides a high-temperature and high-pressure coal slurry shear gate valve controlled by electric-hydraulic. The electric-hydraulic driver cooperates with the oil cylinder to drive the gate plate with a shear ring knife to move linearly along the valve seat, so as to realize the cutting and opening of the high-temperature coal slurry fluid. The application has a compact structure, small shear force, good sealing performance, and improves its service life.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A high-temperature and high-pressure coal slurry shear gate valve controlled by electric-hydraulic includes a valve body, a channel, a valve seat, a gate plate, an electric-hydraulic driver, an oil cylinder, a shear ring knife, and a connecting piece. The valve seat is fixed inside the valve body, and the valve seat is slidably connected with the gate plate. The gate plate is connected to the piston rod of the oil cylinder through the connecting piece. The cylinder body of the oil cylinder is fixed to the valve body. A channel for passing coal slurry is provided inside the valve body, and the gate plate passes through the channel. An electric-hydraulic driver is installed on the valve body, and the electric-hydraulic driver is connected to the oil cylinder. A perforation is provided on the gate plate, and a shear ring knife is fixed inside the perforation.

[0006] Specifically, the electric-hydraulic driver includes an oil pump, an oil tank, an electromagnetic valve, a controller, a filter, and a check valve. Both the oil tank and the oil cylinder are connected to the oil pump. The oil pump is electrically connected to the controller. A filter and a check valve are installed on the pipeline of the oil pump.

[0007] Specifically, the connecting piece includes a fixed block and a valve rod. The piston rod of the oil cylinder, the fixed block, the valve rod, and the gate plate are connected together in sequence.

[0008] Specifically, a gate positioning valve cover is fixed at the tail end of the valve body. A buffer is installed on the gate positioning valve cover. One end of the valve seat is connected to the gate positioning valve cover, and the buffer is located in the cavity of the valve seat.

[0009] Specifically, support bars for supporting the gate are installed on the inner wall of the cavity of the valve seat, and the material of the support bars is polyether ether ketone.

[0010] Specifically, a groove is provided on the outer wall of the valve seat, and a spring is provided between the groove of the valve seat and the inner wall of the valve body cavity.

[0011] Specifically, a sealing ring is provided between the valve seat and the gate, and the material of the sealing ring is polyether ether ketone.

[0012] Specifically, an accumulator is installed on the valve body, and the accumulator is connected to the oil cylinder.

[0013] Specifically, the gate is an alloy steel plate body, and a tungsten carbide coating is provided on the surface of the gate.

[0014] Specifically, the shear ring knife is a titanium alloy knife body. The shear ring knife is an annular knife body, and the cutting edge of the shear ring knife is located in the ring hole.

[0015] The beneficial effects of the present utility model are as follows: The present utility model provides a high-temperature and high-pressure coal slurry shear gate valve controlled by electro-hydraulic. The electro-hydraulic driver cooperates with the oil cylinder to drive the gate with the shear ring knife to move linearly along the valve seat, so as to realize the cutting and opening of the high-temperature coal slurry fluid. The structure of this application is compact, the shearing force is small, the sealing performance is good, and its service life is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0017] Figure 1 is a schematic structural diagram of the first perspective of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the second perspective of the present utility model;

[0019] In the figure, 1. valve body, 2. channel, 3. valve seat, 4. gate, 5. electro-hydraulic driver, 6. oil cylinder,

[0020] 7. shear ring knife, 8. accumulator, 9. connecting piece, 10. gate positioning valve cover, 11. buffer, 12. support bar, 13. spring, 14. sealing ring, 51. oil pump, 52. fuel tank, 53. solenoid valve, 54. controller, 91. fixing block, 92. valve rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present utility model will now be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0022] Figure 1 is a schematic structural diagram of the first perspective of the present utility model, Figure 2 is a schematic structural diagram of the second perspective of the present utility model.

[0023] As shown in the attached Figure 1 figures, an electro-hydraulically controlled high-temperature and high-pressure coal slurry shearing gate valve includes a valve body 1, a passage 2, a valve seat 3, a gate plate 4, an electro-hydraulic actuator 5, an oil cylinder 6, a shearing ring knife 7, and a connecting member 9. The valve seat 3 is fixed inside the valve body 1. The valve seat 3 is slidably connected with the gate plate 4. The gate plate 4 is connected to the piston rod of the oil cylinder 6 through the connecting member 9. The cylinder body of the oil cylinder 6 is fixed to the valve body 1. A passage 2 for passing coal slurry is provided inside the valve body 1. The gate plate 4 passes through the passage 2. An electro-hydraulic actuator 5 is installed on the valve body 1. The electro-hydraulic actuator 5 is connected to the oil cylinder 6. A perforation is provided on the gate plate 4, and the shearing ring knife 7 is fixed inside the perforation.

[0024] As shown in the attached Figure 2 figures, the electro-hydraulic actuator 5 includes an oil pump 51, an oil tank 52, a solenoid valve 53, a controller 54, a filter, and a check valve. The oil tank 52 and the oil cylinder 6 are both connected to the oil pump 51. The oil pump 51 is electrically connected to the controller 54. A filter and a check valve are installed on the pipeline of the oil pump 51.

[0025] The connecting member 9 includes a fixing block 91 and a valve rod 92. The piston rod of the oil cylinder 6, the fixing block 91, the valve rod 92, and the gate plate 4 are connected together in sequence.

[0026] A gate plate positioning valve cover 10 is fixed at the tail end of the valve body 1. A buffer 11 is installed on the gate plate positioning valve cover 10. One end of the valve seat 3 is connected to the gate plate positioning valve cover 10. The buffer 11 is located inside the cavity of the valve seat 3.

[0027] Supporting bars 12 for supporting the gate plate 4 are installed on the inner wall of the cavity of the valve seat 3. The material of the supporting bars 12 is polyether ether ketone.

[0028] A groove is provided on the outer wall of the valve seat 3. A spring 13 is provided between the groove of the valve seat 3 and the inner wall of the cavity of the valve body 1.

[0029] A sealing ring 14 is provided between the valve seat 3 and the gate plate 4. The material of the sealing ring 14 is polyether ether ketone.

[0030] A sealing structure is formed among the supporting bars 12, the sealing ring 14, and the gate plate 4, improving the sealing performance of the shearing gate valve.

[0031] An accumulator 8 is installed on the valve body 1, and the accumulator 8 is connected to the oil cylinder 6. The accumulator 8 stores high-pressure hydraulic oil. In the case where the system loses power or the electro-hydraulic drive 5 fails, the accumulator 8 starts to supply oil to the oil cylinder 6 to achieve the cut-off and opening of the high-temperature coal slurry fluid. The impurities inside the valve body 1 are discharged through the purge valve.

[0032] The gate 4 is an alloy steel plate body, and a tungsten carbide coating is provided on the surface of the gate 4.

[0033] The shear ring cutter 7 is a titanium alloy cutter body. The shear ring cutter 7 is an annular cutter body, and the cutting edge of the shear ring cutter 7 is located inside the ring hole.

[0034] The materials used for the support bar 12, the sealing ring 14, the gate 4, and the shear ring cutter 7 make the shear gate valve more wear-resistant, corrosion-resistant, and high-temperature resistant.

[0035] The operation mode of this application is as follows: The oil pump 51 sucks the hydraulic oil in the fuel tank 52, compresses it and then transports it to the filter for filtration. The filtered hydraulic oil is transported into the oil cylinder 6. The piston rod of the oil cylinder 6 drives the connecting piece 9 to move linearly under the action of high-pressure hydraulic oil. The solenoid valve 53 controls the flow direction of the hydraulic oil through the controller 54. When cutting the high-temperature coal slurry fluid, the perforation on the gate 4 communicates with the channel 2. When the high-temperature coal slurry fluid flows in the channel 2 and the perforation on the gate 4, the oil cylinder 6 drives the gate 4 to move linearly along the inner cavity of the valve seat 3, and the gate 4 can use the shear ring cutter 7 to shear the high-temperature coal slurry. When the gate 4 returns to its original position and the perforation on the gate 4 communicates with the channel 2 again, the high-temperature coal slurry can continue to flow. The shearing force of using the electro-hydraulic drive 5 to drive the shear ring cutter 7 to shear the high-temperature coal slurry is smaller than the pressure of using the hydraulic rod to drive the pressing plate to crush the coal, thus reducing the energy consumption.

[0036] Enlightened by the above ideal embodiments based on the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An electro-hydraulic controlled high-temperature and high-pressure coal slurry shear gate valve, characterized in that: The invention comprises a valve body (1), a channel (2), a valve seat (3), a gate plate (4), an electric hydraulic driver (5), an oil cylinder (6), a shear ring (7), and a connecting piece (9). The valve body (1) is fixed with a valve seat (3), the valve seat (3) and the gate plate (4) are connected together by sliding fit, the gate plate (4) is connected to the piston rod of the oil cylinder (6) through the connecting piece (9), the cylinder body of the oil cylinder (6) and the valve body (1) are fixed together, a channel (2) for passing coal slurry is provided in the valve body (1), the gate plate (4) passes through the channel (2), the valve body (1) is installed with an electric hydraulic driver (5), the electric hydraulic driver (5) is connected to the oil cylinder (6), the gate plate (4) is provided with a through hole, and the shear ring (7) is fixed in the through hole.

2. The electro-hydraulic controlled high-temperature and high-pressure coal slurry shear gate valve according to claim 1 is characterized in that: The electric hydraulic driver (5) comprises an oil pump (51), an oil tank (52), an electromagnetic valve (53), a controller (54), a filter, and a one-way valve. The oil tank (52) and the oil cylinder (6) are both connected to the oil pump (51), the oil pump (51) is electrically connected to the controller (54), and a filter and a one-way valve are installed on the pipeline of the oil pump (51).

3. The electro-hydraulic controlled high-temperature and high-pressure coal slurry shear gate valve according to claim 1, characterized in that: The connecting member (9) comprises a fixing block (91) and a valve stem (92); the piston rod of the oil cylinder (6), the fixing block (91), the valve stem (92) and the gate plate (4) are connected together in sequence.

4. The electro-hydraulic controlled high-temperature and high-pressure coal slurry shear gate valve according to claim 1, characterized in that: A gate positioning valve cover (10) is fixed to the rear end of the valve body (1), a buffer (11) is installed on the gate positioning valve cover (10), one end of the valve seat (3) is connected to the gate positioning valve cover (10), and the buffer (11) is located in the cavity of the valve seat (3).

5. The electro-hydraulic controlled high-temperature and high-pressure coal slurry shear gate valve according to claim 1, characterized in that: A support strip (12) for supporting the gate plate (4) is installed on the inner wall of the chamber of the valve seat (3), and the material of the support strip (12) is polyetheretherketone.

6. The electro-hydraulic controlled high-temperature and high-pressure coal slurry shear gate valve according to claim 1, characterized in that: A groove is provided on the outer wall of the valve seat (3), and a spring (13) is provided between the groove of the valve seat (3) and the inner wall of the valve body (1).

7. The electro-hydraulic controlled high-temperature and high-pressure coal slurry shear gate valve according to claim 1, characterized in that: A sealing ring (14) is provided between the valve seat (3) and the gate plate (4), and the material of the sealing ring (14) is polyetheretherketone.

8. The electro-hydraulic controlled high-temperature and high-pressure coal slurry shear gate valve according to claim 1, characterized in that: An accumulator (8) is installed on the valve body (1), and the accumulator (8) is connected to the oil cylinder (6).

9. The electro-hydraulic controlled high-temperature and high-pressure coal slurry shear gate valve according to claim 1, characterized in that: The gate plate (4) is an alloy steel plate body, and a tungsten carbide coating is provided on the surface of the gate plate (4).

10. The electro-hydraulic controlled high-temperature and high-pressure coal slurry shear gate valve according to claim 1, characterized in that: The shear ring cutter (7) is a titanium alloy cutter body, the shear ring cutter (7) is an annular cutter body, and the blade of the shear ring cutter (7) is located in the annular hole.

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