Coke oven bridge pipe valve control device

Abstract

The present invention provides a coke oven bridge pipe valve body control device, which belongs to the field of coke oven gas control, and is used to solve the problems of dirty and tiring operation of manual control devices in coke oven bridge pipe valve bodies, harsh operating environment, and low adjustment accuracy of pneumatic control devices. By setting up a hydraulic control mechanism, the opening / closing operation of the water seal valve disc and the single carbonization chamber pressure adjustment operation are fully automated through automatic control of the control device, which not only liberates labor but also achieves precise adjustment. Through the precise adjustment of the pressure of the single carbonization chamber of the coke oven, a more significant optimization and upgrade is made for the automated production and clean production of coking. By setting up a manual control mechanism and a manual operating mechanism as a supplement to the hydraulic control mechanism, the use of the present invention is flexible and changeable, and is suitable for various different work scenarios.

Description

Technical Field

[0001] The invention relates to the technical field of coke oven gas control, and in particular to a coke oven bridge pipe valve body control device. Background Art

[0002] The coke oven bridge pipe valve body is a valve body device with a water seal disc and its control components located at the bottom of the bridge pipe. It is installed in the path of raw gas from the riser to the gas collecting pipe. It can guide, pass and block the flow of raw gas at different stages of the coking cycle of the coke oven, and perform water seal operations after blocking.

[0003] There are two types of existing coke oven bridge pipe valve body devices:

[0004] The first type: manual control device, the valve disc opening / closing operation of this device needs to be completed manually, and the operator stands on the top of the coke oven to operate. Since there are many holes in the coke oven, the operation switching between each hole is also relatively frequent, and the working environment on the top of the furnace is relatively harsh (high temperature, large smoke and dust), so manual operation has the problems of harsh operating environment and high difficulty of operation.

[0005] The second method is to improve the water seal cover and valve disc operation mode in the manual control device, add cylinders for opening and closing operations, on the one hand, use the air pressure system to change manual to pneumatic, liberate labor, on the other hand, in line with the process requirements for carbonization chamber pressure regulation, to achieve adjustable operation. However, since the pressure medium of the pneumatic system is gas, the gas has its own characteristics (large compression ratio, greatly affected by seasons and operating environment temperature, etc.) and limitations, so its accuracy in pressure regulation is not high. Summary of the invention

[0006] In order to solve the technical problems that the manual control device in the coke oven bridge pipe valve body is dirty and tiring to operate, the operating environment is harsh, and the adjustment accuracy of the pneumatic control device is low, the present invention provides a coke oven bridge pipe valve body control device.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A coke oven bridge pipe valve body control device, comprising a water seal disc valve, a hydraulic control mechanism, a manual control mechanism and a manual operating mechanism;

[0009] The water seal disc valve comprises a valve body, a valve shaft and a valve disc. The valve body is installed between the bridge pipe and the gas collecting pipe. The valve shaft passes through the valve body. The valve disc is installed in the middle of the valve shaft. The hydraulic control mechanism and the manual control mechanism are respectively connected to both ends of the valve shaft.

[0010] The hydraulic control mechanism comprises an oil cylinder, a first counterweight, a first connecting rod, a manual / hydraulic switching hand wheel, a first position switch device and a first support, the oil cylinder has a built-in displacement sensor, the first support is fixed to the valve body housing, the cylinder body of the oil cylinder is connected to the first support, the telescopic rod of the oil cylinder is hinged to one end of the first connecting rod, the other end of the first connecting rod is connected to the valve shaft, a first shaft hole is provided on the first connecting rod, the first counterweight is connected to the valve shaft through the second connecting rod, a second shaft hole is provided in the middle of the second connecting rod, the manual / hydraulic switching hand wheel is installed in the first shaft hole and its shaft can be inserted into the second shaft hole when switching, the first position switch device is connected to the valve shaft through the third connecting rod, and the oil cylinder is connected to the control system;

[0011] The manual control mechanism includes a second counterweight, a fourth connecting rod, a fixed frame, a sliding frame, a screw, a first operating handwheel, a second operating handwheel, a third operating handwheel, a sliding rod, a threaded sleeve, an axle seat, a sixth connecting rod group and a second support. The manual operating mechanism includes a handle, a seventh connecting rod group and a second position switch device. The second counterweight is connected to the valve shaft through a fifth connecting rod. The fixed frame is fixed in the riser. The fixed frame is a U-shaped steel frame with an opening on the left. The two ends of the sliding rod are respectively connected to the two sides of the opening of the fixed frame. The axle seat is connected to the middle of the bottom of the fixed frame. The threaded sleeve is arranged in the axle seat. The first operating handwheel is threadedly connected to the axle seat and can support the threaded sleeve. One end of the screw is threadedly connected to the threaded sleeve The second operating hand wheel is fixed to the middle part of the screw rod, and the other end of the screw rod is connected to the middle part of the sliding frame. One end of the sliding frame is sleeved on the sliding rod, and the other end of the sliding frame is clamped on the front and rear sides of the fixed frame. The third operating hand wheel is fixed to the right end of the sliding frame, and when the third operating hand wheel rotates, the other end of the sliding frame can be fixed to the fixed frame. One end of the fourth connecting rod is hinged to one end of the sliding frame, and the other end of the fourth connecting rod is hinged to the middle part of the seventh connecting rod group. One end of the seventh connecting rod group is hinged to the second support, and the second support is fixed to the valve body. One end of the sixth connecting rod group is connected to the valve shaft, and the other end of the sixth connecting rod group is hinged to the second support; the handle is connected to the other end of the seventh connecting rod group, and the second position switch device is installed on the seventh connecting rod group.

[0012] Optionally, the manual control mechanism is installed with a limited position seat on the gas collecting pipe.

[0013] Optionally, an indicator needle is connected to the other end of the sliding frame, and a scale is connected to the right side of the fixed frame, and the indicator needle can point to the scale.

[0014] Optionally, an indicator needle is connected to the other end of the sliding frame, and a scale indicator needle is connected to the right side of the fixed frame and can point to the scale.

[0015] The beneficial effects of the present invention are:

[0016] By setting up a hydraulic control mechanism, the opening / closing operation of the water seal valve disc and the single carbonization chamber pressure adjustment operation are fully automated through automatic control of the control device, which not only liberates labor but also achieves precise adjustment. Through the precise adjustment of the pressure of the single carbonization chamber of the coke oven, the coke oven gas spillage is greatly reduced, and a more significant optimization and upgrade is made for the automated production and clean production of coking. By setting up a manual control mechanism and a manual operating mechanism as a supplement to the hydraulic control mechanism, the use of the present invention is flexible and changeable, and is suitable for various different working scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the hydraulic control mechanism in the present invention.

[0018] Figure 2 It is a structural schematic diagram of the manual control mechanism and the manual operation mechanism in the present invention. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 and Figure 2 As shown, the coke oven bridge pipe valve body control device in this embodiment includes a water seal disc valve 1, a hydraulic control mechanism 2, a manual control mechanism 3 and a manual operating mechanism;

[0021] The water seal disc valve 1 comprises a valve body 1-1, a valve shaft 1-2 and a valve disc 1-3. The valve body 1-1 is installed between the bridge pipe 4 and the gas collecting pipe 5. The valve shaft 1-2 passes through the valve body 1-1. The valve disc 1-3 is installed in the middle of the valve shaft 1-2. The hydraulic control mechanism 2 and the manual control mechanism 3 are respectively connected to both ends of the valve shaft 1-2.

[0022] The hydraulic control mechanism 2 includes a cylinder 2-1, a first counterweight 2-2, a first connecting rod 2-3, a manual / hydraulic switching hand wheel 2-4, a first position switch device 2-5 and a first support 2-6. The cylinder 2-1 has a built-in displacement sensor. The first support 2-6 is fixed on the valve body 1-1 housing. The cylinder body of the cylinder 2-1 is connected to the first support 2-6. The telescopic rod of the cylinder 2-1 is hinged to one end of the first connecting rod 2-3. The other end of the first connecting rod 2-3 is connected to the valve shaft 1-2. A first axial hole is provided on the first connecting rod 2-3. The first counterweight 2-2 is connected to the valve shaft 1-2 through the second connecting rod 2-7. A second axial hole is provided in the middle of the second connecting rod 2-7. The manual / hydraulic switching hand wheel 2-4 is installed in the first axial hole and its shaft can be inserted into the second axial hole when switching. The first position switch device 2-5 is connected to the valve shaft 1-2 through the third connecting rod 2-8. The cylinder 2-1 is connected to the control system. The control system is a PLC or DCS control system.

[0023] The manual control mechanism 3 includes a second counterweight 3-1, a fourth connecting rod 3-2, a fixed frame 3-3, a sliding frame 3-4, a screw 3-5, a first operating handwheel 3-6, a second operating handwheel 3-7, a third operating handwheel 3-8, a sliding rod 3-9, a threaded sleeve 3-10, a shaft seat 3-11, a sixth connecting rod group 3-13 and a second support 3-14, and the manual operating mechanism includes a handle 4-1, a seventh connecting rod group 4-2 and a second position switch device 4-3, and the second counterweight The weight 3-1 is connected to the valve shaft 1-2 through the fifth connecting rod 3-12, the fixing frame 3-3 is fixed in the rising pipe 6, the fixing frame 3-3 is a U-shaped steel frame with an opening on the left side, the two ends of the slide rod 3-9 are respectively connected to the two sides of the opening of the fixing frame 3-3, the shaft seat 3-11 is connected to the middle of the bottom of the fixing frame 3-3, the threaded sleeve 3-10 is sleeved in the shaft seat 3-11, the first operating hand wheel 3-6 is threadedly connected to the shaft seat 3-11 and can support the threaded sleeve 3-10, and one end of the screw 3-5 is connected to the threaded sleeve The second operating hand wheel 3-7 is fixed to the middle of the screw rod 3-5, the other end of the screw rod 3-5 is connected to the middle of the sliding frame 3-4, one end of the sliding frame 3-4 is sleeved on the sliding rod 3-9, the other end of the sliding frame 3-4 is clamped on the front and rear sides of the fixed frame 3-3, the third operating hand wheel 3-8 is fixed to the right end of the sliding frame 3-4, and when the third operating hand wheel 3-8 rotates, the other end of the sliding frame 3-4 can be fixed to the fixed frame 3-3, one end of the fourth connecting rod 3-2 is connected to the sliding frame 3-4 is hinged at one end, the other end of the fourth connecting rod 3-2 is hinged to the middle part of the seventh connecting rod group 4-2, one end of the seventh connecting rod group 4-2 is hinged to the second support 3-14, the second support 3-14 is fixed on the valve body 1-1, one end of the sixth connecting rod group 3-13 is connected to the valve shaft 1-2, and the other end of the sixth connecting rod group 3-13 is hinged to the second support 3-14; the handle 4-1 is connected to the other end of the seventh connecting rod group 4-2, and the second position switch device 4-3 is installed on the seventh connecting rod group 4-2.

[0024] Optionally, the manual control mechanism 3 is installed with a limit seat 3 - 15 on the gas collecting pipe 5 .

[0025] Optionally, the other end of the sliding frame 3-4 is connected with an indicator needle, and the right side of the fixed frame 3-3 is connected with a scale 3-16, and the indicator needle can point to the scale 3-16. The stroke of the manual control mechanism can be accurately determined by the indicator needle and the scale 3-16.

[0026] The present invention uses hydraulic drive to automatically open and close the valve disc 1-3 through the hydraulic control mechanism 2. The details are as follows:

[0027] (1) Close valve disc 1-3:

[0028] First, rotate the manual / hydraulic switching hand wheel 2-4 so that the shaft of the manual / hydraulic switching hand wheel 2-4 passes through the second shaft hole to switch the hydraulic / manual switch to the hydraulic connection state; then, loosen Figure 2 The first hand wheel 3-1 and the third hand wheel 3-3 in the manual control mechanism 3 are turned to loosen the tightening of the manual control mechanism 3; finally, the control system controls the hydraulic system to start pressurizing to extend the cylinder 2-1, and the first connecting rod 2-3 drives the valve shaft 1-2 to rotate clockwise and then drives the valve disc 1-3 to rotate, and the valve disc 1-3 rotates upward to close.

[0029] (2) Open valve disc 1-3:

[0030] First, confirm that the manual / hydraulic switching handwheel 2-4 has been rotated to rotate the hydraulic / manual switch to the hydraulic connection state; then, confirm that the first handwheel 3-1 and the third handwheel 3-3 have been loosened; then, the control system controls the hydraulic system to start pressurizing to shorten the cylinder 2-1, and the first connecting rod 2-3 drives the valve shaft 1-2 to rotate counterclockwise and then drives the valve disc 1-3 to rotate, and the valve disc 1-3 rotates downward to open.

[0031] During the opening / closing action of the valve disc 1-3, the oil cylinder 2-1 pushes the valve disc 1-3 to rotate steplessly, and the open position state of the valve disc 1-3 is collected to the PLC or DCS control system through the displacement sensor built into the oil cylinder 2-1 and the first position switch device 2-5. The size of the opening angle of the valve disc 1-3 affects the flow cross-section of the raw gas, which is associated with the pressure of the coke oven carbonization chamber, and is ultimately reflected in the change in the data of the riser 6 pressure sensor. The control system controls the action of the oil cylinder 2-1 according to the threshold set by the program, stabilizes the pressure in the furnace, and ensures that the pressure at the bottom of the single carbonization chamber is maintained at 5~30Pa. In the process of regulating the pressure of the single carbonization chamber, the present invention can use the hydraulic control mechanism 2 to adjust the opening of the valve disc 1-3, so that the pressure regulation of the single carbonization chamber of the coke oven during the coking cycle can be changed steplessly and more accurately. Therefore, since the pressure fluctuation in the furnace is more effectively controlled, the probability of furnace leakage is smaller.

[0032] The present invention utilizes the advantages of liquid medium over gas medium (small compression ratio, small temperature influence), and adopts hydraulic system as operating power, which not only realizes automatic control of coke oven bridge pipe valve body, thereby reducing operation difficulty and labor cost, but also solves the leakage of coal gas and smoke with higher requirements, making the coke oven production environment cleaner.

[0033] Furthermore, when the opening and closing of the valve disc needs to be manually controlled in certain scenarios, it can be achieved through the manual control mechanism 3. After rotating the manual / hydraulic switching hand wheel 2-4 to disengage its shaft from the second shaft hole, the hydraulic / manual switch is switched to the hydraulic disengagement state, and the valve disc 1-3 can be manually controlled through the first hand wheel 3-6, the second hand wheel 3-7 and the third hand wheel 3-8. The details are as follows:

[0034] (1) Open valve disc 1-3:

[0035] First, tighten the first hand wheel 3-6 so that the shaft of the first hand wheel 3-6 presses against the threaded sleeve 3-10 to ensure that the screw 3-5 is fastened to the fixed frame 3-3; then, confirm that the third hand wheel 3-8 is in a loosened state; and then rotate the second hand wheel 3-7 on the screw 3-5 clockwise to move the screw 3-5 upward, thereby driving the sliding frame 3-4 to move upward, and then driving the fourth connecting rod 3-2 to move, and transmitting power to the sixth connecting rod group 3-13 through the fourth connecting rod 3-2, thereby driving the valve shaft 1-2 to rotate clockwise, and the valve disc 1-3 opens.

[0036] (2) Close valve disc 1-3:

[0037] First, confirm that the first hand wheel 3-6 is tightened and the screw rod 3-5 is fixed on the fixing frame 3-3; then, confirm that the third hand wheel 3-8 is loosened; then, rotate the second hand wheel 3-7 counterclockwise to make the screw rod 3-5 move downward, thereby driving the fourth connecting rod 3-2 to move downward, and transmitting power to the sixth connecting rod group 3-13 through the fourth connecting rod 3-2, thereby driving the valve shaft 1-2 to rotate counterclockwise, and the valve disc 1-3 is closed;

[0038] During the opening / closing process of the valve disc, if the action needs to be stopped at any time according to the feedback of the coke oven pressure data, the second hand wheel 3-7 is stopped, and the third hand wheel 3-8 is tightened to fix the manual control mechanism 3 on the fixed frame 3-3. There is a scale 3-16 on the fixed frame 3-3, which can read the manual operation stroke. Manual adjustment is controlled by thread, which can match the control accuracy of the automatic control system. In manual control, the open position state of the valve disc 1-3 can also be collected to the control system through the first position switch device 2-5.

[0039] Furthermore, the present invention can also manually operate the valve disc 1-3 to open and close through a manual operating mechanism. Specifically, during operation, the handle 4-1 is held and moved up and down, driving the seventh connecting rod group 4-2 to move up and down, and then the force is transmitted to the sixth connecting rod group 3-13, thereby driving the valve shaft 1-2 and the valve disc 1-3 to rotate to realize the opening and closing of the valve disc 1-3. Manual operation is an operation when both the hydraulic control mechanism 2 and the manual control mechanism 3 fail, during the initial installation test or other special circumstances. The manual operating mechanism can only perform simple opening and closing operations of the valve disc 1-3. The displacement of the manual operation can also be collected into the control system through the second position switch device 4-3.

[0040] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A coke oven bridge pipe valve body control device, characterized in that: It comprises a water seal disc valve (1), a hydraulic control mechanism (2), a manual control mechanism (3) and a manual operating mechanism; The water seal disc valve (1) comprises a valve body (1-1), a valve shaft (1-2) and a valve disc (1-3); the valve body (1-1) is installed between a bridge pipe (4) and a gas collecting pipe (5); the valve shaft (1-2) passes through the valve body (1-1); the valve disc (1-3) is installed in the middle of the valve shaft (1-2); and the hydraulic control mechanism (2) and the manual control mechanism (3) are respectively connected to both ends of the valve shaft (1-2); The hydraulic control mechanism (2) comprises an oil cylinder (2-1), a first counterweight (2-2), a first connecting rod (2-3), a manual / hydraulic switching hand wheel (2-4), a first position switch device (2-5) and a first support (2-6); the oil cylinder (2-1) has a built-in displacement sensor; the first support (2-6) is fixed to the housing of the valve body (1-1); the cylinder body of the oil cylinder (2-1) is connected to the first support (2-6); the telescopic rod of the oil cylinder (2-1) is hinged to one end of the first connecting rod (2-3); the first connecting rod ( 2-3) and the other end is connected to the valve shaft (1-2), a first shaft hole is provided on the first connecting rod (2-3), the first counterweight (2-2) is connected to the valve shaft (1-2) via the second connecting rod (2-7), a second shaft hole is provided in the middle of the second connecting rod (2-7), a manual / hydraulic switching hand wheel (2-4) is installed in the first shaft hole and its shaft can be inserted into the second shaft hole when switching, the first position switch device (2-5) is connected to the valve shaft (1-2) via the third connecting rod (2-8), and the oil cylinder (2-1) is connected to the control system; The manual control mechanism (3) comprises a second counterweight (3-1), a fourth connecting rod (3-2), a fixed frame (3-3), a sliding frame (3-4), a screw rod (3-5), a first operating hand wheel (3-6), a second operating hand wheel (3-7), a third operating hand wheel (3-8), a sliding rod (3-9), a threaded sleeve (3-10), a shaft seat (3-11), a sixth connecting rod group (3-13) and a second support (3-14); the manual operating mechanism comprises a handle (4-1), a seventh connecting rod group (4-2) and a second position switch device (4-3); the first The second counterweight (3-1) is connected to the valve shaft (1-2) through a fifth connecting rod (3-12). The fixing frame (3-3) is fixed in the rising pipe (6). The fixing frame (3-3) is a U-shaped steel frame with an opening on the left side. The two ends of the sliding rod (3-9) are respectively connected to the two sides of the opening of the fixing frame (3-3). The shaft seat (3-11) is connected to the middle of the bottom of the fixing frame (3-3). The threaded sleeve (3-10) is sleeved in the shaft seat (3-11). The first operating hand wheel (3-6) is threadedly connected to the shaft seat (3-11) and can support the threaded sleeve (3-10). One end of the screw rod (3-5) is connected to the shaft seat (3-11). The threaded sleeve (3-10) is threadedly connected, the second operating hand wheel (3-7) is fixed to the middle of the screw rod (3-5), the other end of the screw rod (3-5) is connected to the middle of the sliding frame (3-4), one end of the sliding frame (3-4) is sleeved on the sliding rod (3-9), the other end of the sliding frame (3-4) is clamped on the front and rear sides of the fixed frame (3-3), the third operating hand wheel (3-8) is fixed to the right end of the sliding frame (3-4), and when the third operating hand wheel (3-8) rotates, the other end of the sliding frame (3-4) can be fixed on the fixed frame (3-3), one end of the fourth connecting rod (3-2) is connected to the sliding frame (3-4) One end of the frame (3-4) is hinged, the other end of the fourth connecting rod (3-2) is hinged to the middle of the seventh connecting rod group (4-2), one end of the seventh connecting rod group (4-2) is hinged to the second support (3-14), the second support (3-14) is fixed on the valve body (1-1), one end of the sixth connecting rod group (3-13) is connected to the valve shaft (1-2), and the other end of the sixth connecting rod group (3-13) is hinged to the second support (3-14); the handle (4-1) is connected to the other end of the seventh connecting rod group (4-2), and the second position switch device (4-3) is installed on the seventh connecting rod group (4-2).

2. The coke oven bridge pipe valve body control device according to claim 1, characterized in that: The manual control mechanism (3) is installed with a limit seat (3-15) on the gas collecting pipe (5).

3. The coke oven bridge pipe valve body control device according to claim 1, characterized in that: The other end of the sliding frame (3-4) is connected to an indicator needle, and the right side of the fixed frame (3-3) is connected to a scale (3-16), and the indicator needle can point to the scale (3-16).

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