Sleeve cooling and anti-blocking device for rotation-resistant level gage of tail blanking pipe of dry distillation furnace

Abstract

The utility model discloses a sleeve cooling and anti-blocking device for a rotation-resistant level gage of a tail blanking pipe of a dry distillation furnace, which comprises a rotation-resistant level gage body, a fixing nut is provided with a drill hole along the radial direction, the outer side of the drill hole is connected with an air inlet pipeline, and the inner side of the drill hole is connected with a purging pipe; a closed annular cavity is defined by the heat dissipation protection cylinder and the main shaft rotating rod protection cylinder. A main shaft penetrating hole is formed in the main shaft rotating rod protection cylinder, and the main shaft rotating rod penetrates through the main shaft penetrating hole; the air inlet pipeline is provided with an orifice plate flowmeter, the orifice plate flowmeter is connected with a transmitter, the transmitter is in signal connection with the DCS control cabinet, the downstream of the orifice plate flowmeter is provided with a pneumatic control valve, and the pneumatic control valve is in signal connection with the DCS control cabinet. According to the utility model, nitrogen purging is adopted, so that the problem of measurement distortion of the rotation-resistant level gauge caused by the fact that the main shaft rotating rod is blocked by coal powder and cannot rotate due to the fact that high-temperature coal powder enters from a gap between the main shaft through hole of the main shaft rotating rod protection cylinder of the rotation-resistant level gauge and the main shaft rotating rod when the material level is measured in the tail blanking pipe of the dry distillation furnace is well solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of dry distillation furnace tail drop pipe resistance to spin material level meter cooling anti-blocking device, and specifically to the technical field of resistance to spin material level meter material level measurement. BACKGROUND

[0002] Resistance to spin material level meter is also called resistance to spin material level switch, resistance to spin material level switch, etc., mainly according to its different purposes, the function is similar. Resistance to spin material level meter is driven by a micro motor after deceleration, and the detection paddle rotates slowly. When the material level of the measured material rises and the rotation of the paddle is blocked, the detection mechanism shaft produces rotational displacement. This displacement first causes a micro switch to act, sending a signal that there is material. Then another micro switch acts, cutting off the power supply of the micro motor to stop its rotation. As long as the material level in the bin does not change, this state will remain unchanged.

[0003] However, when measuring the material level of high-temperature coal powder in the dry distillation furnace tail drop pipe, the temperature of the high-temperature coal powder in the dry distillation furnace tail drop pipe reaches 550°C, causing the dry and fine coal powder to easily enter the resistance to spin material level meter main shaft rotating rod protection cylinder through the gap between the main shaft rotating rod protection cylinder main shaft perforation and the main shaft rotating rod. When the resistance to spin material level meter main shaft rotating rod protection cylinder is full of coal powder, the main shaft rotating rod cannot rotate, causing the resistance to spin material level meter to measure inaccurately and trigger the low-low material level interlock problem. The temperature in the dry distillation furnace tail drop pipe reaches 550°C, and the heat protection cylinder cannot effectively reduce the high temperature of the dry distillation furnace tail drop pipe heat transfer to the resistance to spin material level meter motor junction box, causing the circuit board in the resistance to spin material level meter motor junction box to be damaged.

[0004] The existing technology solves the problem of resistance to spin material level meter main shaft rotating rod protection cylinder full of coal powder blocking the main shaft rotating rod from rotating by stopping the dry distillation process, pulling out the resistance to spin material level meter, removing the main shaft perforation and the top wire of the main shaft rotating rod protection cylinder, pulling out the main shaft perforation, cleaning the coal powder in the main shaft rotating rod protection cylinder, and then assembling and reinstalling it in the dry distillation furnace tail drop pipe. This method not only consumes time and effort, but also increases the downtime of the dry distillation device, resulting in substandard production yield and pass rate, causing significant losses. The circuit board in the resistance to spin material level meter motor junction box is damaged by high temperature. The existing technology can only replace the circuit board, and the instrument control maintenance worker can cover the heat protection cylinder with a wet cloth to artificially cool it. This method not only increases the risk of instrument control maintenance worker falling from a high place and being scalded, but also increases production costs and is time-consuming and labor-intensive. UTILITY MODEL CONTENTS

[0005] The utility model discloses a dry distillation furnace tail falling material pipe resistance to spin material level meter cooling anti -blocking device can effectively prevent the coal powder into the resistance to spin material level meter main shaft spin rod protection cylinder, and reduce the temperature of main shaft spin rod protection cylinder, thereby preserving resistance to spin material level meter normal operation, accurate measurement dry distillation furnace tail in the material level.

[0006] In order to realize the above technical effect, the utility model adopts the following technical scheme:

[0007] A dry distillation furnace tail falling material pipe resistance to spin material level meter cooling anti -blocking device, including resistance to spin material level meter body and air inlet pipeline, resistance to spin material level meter body includes motor terminal box, heat protection cylinder, fixed nut, material level meter flange, main shaft spin rod protection cylinder, main shaft spin rod and vane, the fixed nut is equipped with drilling hole, the drilling hole outside is connected with air inlet pipeline, and the drilling hole in side is equipped with purging pipe, the heat protection cylinder and main shaft spin rod protection cylinder are surrounded and form the closed annular cavity between, the main shaft spin rod protection cylinder is equipped with main shaft perforation, and the main shaft spin rod is worn in the main shaft perforation, the air inlet pipeline is equipped with orifice meter and pneumatic regulating valve, the orifice meter is connected with the transmitter, the transmitter is connected with DCS control cabinet signal, the downstream of orifice meter is equipped with pneumatic regulating valve, and the pneumatic regulating valve is connected with DCS control cabinet signal, the fixed nut air inlet that forms through the drilling hole is communicated with purging pipe, and the nitrogen in nitrogen main pipe is introduced into the main shaft spin rod protection cylinder, makes it form the positive pressure in the main shaft spin rod protection cylinder, and continuously flows out from the gap between the main shaft perforation of main shaft spin rod protection cylinder and main shaft spin rod, prevents the coal powder from entering the main shaft spin rod protection cylinder, also reduces the temperature of resistance to spin material level meter main shaft spin rod protection cylinder through the nitrogen of flow circulation, effectively solves the damage aging of circuit board in resistance to spin material level meter motor terminal box due to high temperature, the installation of flowmeter, the nitrogen usage of post staff is convenient for statistics, also can add the time curve of flowmeter data and pneumatic regulating valve opening degree in DCS control cabinet, and it is convenient for instrument control point inspection to understand the running state of resistance to spin material level meter, the installation of pneumatic regulating valve, and it is convenient for post staff to adjust the flow of nitrogen remotely.

[0008] Further, the orifice meter upstream is equipped with filter pressure reducing valve, the installation of filter pressure reducing valve can not only regulate and control nitrogen pressure, but also filter the impurities and moisture in nitrogen in nitrogen main pipe, prevent nitrogen pipeline and fixed nut air inlet, purging pipe from being blocked by impurities in nitrogen, cause nitrogen to be unable to continuously enter the main shaft spin rod protection cylinder.

[0009] Further, the air inlet pipeline is equipped with two stop valves, one is arranged on the upstream of filter pressure reducing valve, and the other is arranged on the downstream of starting regulating valve, the installation of stop valve is convenient for on-line replacement filter pressure reducing valve, or on-line maintenance transmitter and pneumatic regulating valve.

[0010] Further, the air inlet pipeline is connected to nitrogen main pipe.

[0011] Further, the blowing pipe is L-shaped, wherein the short end is connected to the inside of the drill hole, the long end extends into the spindle rotating rod protection cylinder, and the long end is close to but not in contact with the inner wall of the spindle rotating rod protection cylinder; the L-shaped blowing pipe can make the pipe opening closer to the gap between the spindle perforation and the spindle rotating rod in the spindle rotating rod protection cylinder, improve the blowing effect, and avoid the spindle rotating rod to prevent the blowing pipe from interfering with the normal operation of the spindle rotating rod.

[0012] Further, one side of the dry distillation furnace tail discharge pipe is provided with a branch pipe, the end of the branch pipe is provided with a branch pipe flange, and the material level meter flange is installed in cooperation with the branch pipe flange, wherein the spindle rotating rod protection cylinder, the spindle rotating rod and the blade are arranged in the branch pipe, and the spindle rotating rod protection cylinder and the spindle rotating rod partially extend into the dry distillation furnace tail discharge pipe, and the blade completely extends into the dry distillation furnace tail discharge pipe.

[0013] The device has the advantages of low cost, simple installation and operation, reliable use, convenient maintenance, and good solution to the problem that high-temperature coal powder enters the gap between the spindle perforation and the spindle rotating rod in the spindle rotating rod protection cylinder of the anti-rotation material level meter, causing the spindle rotating rod to be stuck and unable to rotate, resulting in measurement distortion of the anti-rotation material level meter, positive pressure blowing of nitrogen not only prevents high-temperature coal powder from entering the gap between the spindle perforation and the spindle rotating rod in the spindle rotating rod protection cylinder of the anti-rotation material level meter, but also reduces the temperature of the spindle rotating rod protection cylinder of the anti-rotation material level meter through the flowing nitrogen, and the secondary cooling of the heat dissipation protection cylinder effectively solves the damage and aging of the circuit board in the motor junction box of the anti-rotation material level meter caused by high temperature, eliminates the shutdown maintenance of the process due to the spindle rotating rod being stuck and unable to rotate to measure the material level of the anti-rotation material level meter, avoids the risk of falling from a high place and scalding when an instrument control personnel replaces the anti-rotation material level meter, and ensures the yield and qualification rate of the process product. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The utility model discloses a structure schematic diagram;

[0015] In the drawing, 1-anti-rotation material level meter, 2-motor junction box, 3-heat dissipation protection cylinder, 4-fixing nut, 5-material level meter flange, 6-spindle rotating rod protection cylinder, 7-spindle rotating rod, 8-blade, 9-inlet pipeline, 10-blowing pipe, 11-orifice plate flowmeter, 12-transmitter, 13-filtering pressure reducing valve, 14-pneumatic regulating valve, 15-stop valve, 16-dry distillation furnace tail discharge pipe, 17-nitrogen main pipe, 18-branch pipe, 19-branch pipe flange. DETAILED DESCRIPTION

[0016] The technical scheme of the utility model will be further described below with reference to the drawings.

[0017] For example, Figure 1As shown, a dry distillation furnace tail drop pipe blocking material level meter cooling anti-blocking device, including blocking material level meter 1 body, blocking material level meter 1 body including motor terminal box 2, heat dissipation protection cylinder 3, fixed nut 4, material level meter flange 5, main shaft rotating rod protection cylinder 6, main shaft rotating rod 7 and blade 8.

[0018] The terminal box is prior art, which is provided with a driving motor, and a micro switch is connected to the power supply circuit of the driving motor. The output end is connected to the main shaft rotating rod 7 through a shaft sleeve to drive the main shaft rotating rod 7 to rotate. The micro switch can control the start and stop of the driving motor. The terminal box is also provided with detection elements, control elements and sensing elements, which are all prior art and will not be described here.

[0019] The center of the material level meter flange 5 has a center hole through which the material level meter shaft passes. The material level meter flange 5 is used to be fixedly connected with the branch flange 19 on the wall of the dry distillation furnace tail drop pipe to realize the fixation of the blocking material level meter.

[0020] The main shaft rotating rod protection cylinder 6 is sleeved on the main shaft rotating rod 7 to protect the main shaft rotating rod 7. The center of the main shaft rotating rod protection cylinder 6 is provided with a main shaft hole through which the main shaft rotating rod 7 passes. The heat dissipation protection cylinder 3 and the main shaft rotating rod protection cylinder 6 form a closed annular cavity. The end of the main shaft rotating rod 7 away from the motor terminal box 2 extends out of the main shaft rotating rod protection cylinder 6, and the end is fixed with the blade 8. The blade 8 rotates with the rotation of the material level meter shaft.

[0021] One side of the dry distillation furnace tail drop pipe is provided with a branch pipe 18, and the end of the branch pipe is provided with a branch flange. The material level meter flange 5 is installed in cooperation with the branch flange 19. The main shaft rotating rod protection cylinder 6, the main shaft rotating rod 7 and the blade 8 are arranged in the branch pipe 18. The main shaft rotating rod protection cylinder 6 and the main shaft rotating rod 7 partially extend into the dry distillation furnace tail drop pipe 16, and the blade 8 completely extends into the dry distillation furnace tail drop pipe 16.

[0022] The fixed nut 4 is provided with a drill hole in the radial direction. An air inlet pipe 9 is connected to the outside of the drill hole, and a purge pipe 10 is connected to the inside of the drill hole. The purge pipe 10 extends into the main shaft rotating rod protection cylinder 6, and nitrogen gas is introduced into the purge pipe 10 through the air inlet pipe 9. The air inlet pipe 9 is connected to the nitrogen gas main pipe 17 to provide continuous nitrogen gas supply, preventing the problem of continuous production caused by the shortage of gas in the gas cylinder.

[0023] The purge pipe 10 is L-shaped, with the short end connected to the inside of the drill hole and the long end extending into the main shaft rotating rod protection cylinder. The long end is close to but not in contact with the inner wall of the main shaft rotating rod protection cylinder 6. The L-shaped purge pipe 10 can make the pipe opening closer to the gap between the main shaft hole of the main shaft rotating rod protection cylinder 6 and the main shaft rotating rod 7, improving the effect of purging, while avoiding the main shaft rotating rod to prevent the purge pipe from interfering with the normal operation of the main shaft rotating rod.

[0024] The orifice flowmeter 11 is provided with a filter pressure reducing valve 13 upstream, which can regulate the nitrogen pressure, and can also filter the impurities and moisture in the nitrogen in the nitrogen main pipe 17, so as to prevent the nitrogen pipeline and the fixed nut 4 air inlet and the purge pipe 10 from being blocked by the impurities in the nitrogen, and cause the nitrogen to be unable to continuously enter the main shaft rotating rod protection cylinder 6.

[0025] The orifice flowmeter 11 is provided with a filter pressure reducing valve 13 upstream, which can regulate the nitrogen pressure, and can also filter the impurities and moisture in the nitrogen in the nitrogen main pipe 17, so as to prevent the nitrogen pipeline and the fixed nut 4 air inlet and the purge pipe 10 from being blocked by the impurities in the nitrogen, and cause the nitrogen to be unable to continuously enter the main shaft rotating rod protection cylinder 6.

[0026] Two stop valves 15 are arranged on the air inlet pipeline 9, one is arranged upstream of the filter pressure reducing valve 13, and the other is arranged downstream of the pneumatic regulating valve 14, so as to facilitate online replacement of the filter pressure reducing valve 13, or online maintenance of the transmitter 12 and the pneumatic regulating valve 14.

[0027] The use principle of the utility model is as follows: the material level meter flange is fixedly connected with the branch flange 19 on the pipe wall of the dry distillation furnace tail discharging pipe 16, the blades 8 are all inserted into the dry distillation furnace tail discharging pipe 16, the main shaft rotating rod protection cylinder 6 and the main shaft rotating rod 7 are partially inserted into the dry distillation furnace tail discharging pipe 16, the nitrogen enters the purge pipe 10 in the main shaft rotating rod protection cylinder 6 of the anti-rotation material level meter 1 through the fixed nut 4 air inlet, a positive pressure is formed in the main shaft rotating rod protection cylinder 6 of the anti-rotation material level meter 1, the nitrogen is continuously blown out from the gap between the main shaft perforation of the main shaft rotating rod protection cylinder 6 of the anti-rotation material level meter 1 and the main shaft rotating rod 7, the coal powder in the dry distillation furnace tail discharging pipe 16 cannot enter the main shaft rotating rod protection cylinder 6 of the anti-rotation material level meter 1, so that the main shaft rotating rod 7 of the anti-rotation material level meter 1 can continuously rotate, and the effective measurement of the material level is ensured.

[0028] The utility model discloses device cost is lower, and the installation operation is simple, and reliable in practical application, and maintenance is convenient, and the good solution has been blocked in the dry distillation furnace tail drop material pipe and measures material level when the rotation material level meter 1, because high temperature coal dust enters from the gap between the main shaft perforation of rotation material level meter 1 main shaft rotating rod protection cylinder 6 and main shaft rotating rod 7, causes main shaft rotating rod 7 to be stuck by coal dust and unable to rotate, causes the problem of the distortion of the measurement of rotation material level meter 1, through the positive pressure purging of nitrogen, effectively solved the damage aging problem of the circuit board in the motor terminal box 2 of rotation material level meter 1 because of high temperature, and the situation of shutdown maintenance because the rotation material level meter 1 is stuck by coal dust and unable to rotate to measure material level is avoided, the risk of falling from a height and scalding when instrument control personnel replaces rotation material level meter 1 is avoided, and the yield and the qualified rate of process product are guaranteed.

Claims

1. A kind of dry distillation furnace tail drop material pipe resistance material level gauge sleeve cooling anti-blocking device, it is characterized in that, The application relates to a blocking-rotation material level meter (1) which comprises a body and an air inlet pipeline (9); the body comprises a motor terminal box (2), a heat dissipation protection cylinder (3), a fixing nut (4), a material level meter flange (5), a main shaft rotating rod protection cylinder (6), a main shaft rotating rod (7) and blades (8); the fixing nut (4) is provided with a drilling hole, the outer side of the drilling hole is connected with the air inlet pipeline (9), and the inner side of the drilling hole is provided with a blowing pipeline (10); a closed annular cavity is formed between the heat dissipation protection cylinder (3) and the main shaft rotating rod protection cylinder (6); the main shaft rotating rod protection cylinder (6) is provided with a main shaft perforation, and the main shaft rotating rod (7) is arranged in the main shaft perforation; the air inlet pipeline (9) is provided with an orifice flowmeter (11) and a pneumatic regulating valve (14), the orifice flowmeter (11) is connected with a transmitter (12), the transmitter (12) is connected with a DCS control cabinet signal, the downstream side of the orifice flowmeter (11) is provided with the pneumatic regulating valve (14), and the pneumatic regulating valve (14) is connected with the DCS control cabinet signal.

2. The anti-blocking device for the temperature reduction of the sleeve of the material level meter of the tail drop pipe of the dry distillation furnace according to claim 1, characterized in that, The upstream side of the orifice flowmeter (11) is provided with a filter pressure reducing valve (13).

3. The anti-blocking device for the temperature reduction of the sleeve of the material level meter of the tail drop pipe of the dry distillation furnace according to claim 1, characterized in that, The air inlet pipeline (9) is provided with two stop valves (15), one of which is arranged on the upstream side of the filter pressure reducing valve (13), and the other of which is arranged on the downstream side of the starting regulating valve.

4. The anti-blocking device for the temperature reduction of the sleeve of the material level meter of the tail pipe of the dry distillation furnace according to claim 1, characterized in that, The air inlet pipeline (9) is connected with a nitrogen main pipeline (17).

5. The anti-blocking device for the temperature reduction of the sleeve of the material blocking level meter of the tail drop pipe of the dry distillation furnace according to claim 1, characterized in that, The blowing pipeline (10) is L-shaped, one end of which is connected with the inner side of the drilling hole, and the other end of which is arranged in the main shaft rotating rod protection cylinder (6) and is close to but not attached to the inner wall of the main shaft rotating rod protection cylinder (6).

6. The anti-blocking device for the temperature reduction of the sleeve of the material blocking level meter of the tail drop pipe of the dry distillation furnace according to claim 1, characterized in that, One side of the dry distillation furnace tail dropping pipe (16) is provided with a branch pipe (18), the end of the branch pipe (18) is provided with a branch pipe flange (19), the material level meter flange (5) and the branch pipe flange (19) are cooperatively arranged, the main shaft rotating rod protection cylinder (6), the main shaft rotating rod (7) and the blades (8) are arranged in the branch pipe (18), and the main shaft rotating rod protection cylinder (6) and the main shaft rotating rod (7) are partially arranged in the dry distillation furnace tail dropping pipe (16), and the blades (8) are completely arranged in the dry distillation furnace tail dropping pipe.

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