Vacuumizing device for special carbon product hot-in and cold-out impregnation process

Abstract

The invention relates to a vacuumizing device for a special carbon product hot-in and cold-out impregnation process, which comprises a vacuum header pipe, a conveying pipe, two vacuum branch pipes and two groups of filtering mechanisms, the vacuum header pipe is communicated with the middle of the conveying pipe, the two vacuum branch pipes are respectively communicated with two ends of the conveying pipe, and each filtering mechanism comprises a front roots vacuum pump, a filter and a rear roots vacuum pump. The filter comprises a filter box and a filter cartridge, a first air inlet cover is arranged on the right side of the filter cartridge, a first air outlet cover is arranged on the left side of the filter cartridge, a second air inlet cover is arranged on the left side of the filter box, and a second air outlet cover is arranged on the right side of the filter box. The small-diameter end of the first air outlet cover is fixedly communicated with the small-diameter end of the second air inlet cover, and the small-diameter end of the second air outlet cover is detachably communicated with an extraction opening of the rear roots vacuum pump. The Roots vacuum pump is adopted, multiple efficient and high-quality filtering treatment on extracted gas can be achieved, and the device is safer and more environmentally friendly.

Description

Technical Field

[0001] The invention belongs to the technical field of special carbon product production, and in particular relates to a vacuum pumping device for a hot-in and cold-out impregnation process of special carbon products. Background Art

[0002] At present, special carbon products are usually produced by the hot-in, cold-out impregnation process, that is, after the product is preheated, it is loaded into the impregnation tank and evacuated, and then the impregnation tank is filled with molten impregnating agent asphalt for pressurized impregnation. After the impregnation is completed, the asphalt in the impregnation tank is pumped back, and then the circulating cooling water is directly injected to forcefully cool the impregnated product. After cooling to the temperature required by the process, the cooling water is pumped back into the cooling water tank. Among them, when evacuating, the extracted gas often contains a certain amount of tar, which needs to be filtered before it can be discharged. However, the existing vacuum systems are mostly common ordinary vacuum pumps and diesel filtration methods, which have poor filtering and purification effects, and the overall safety and environmental protection do not meet the requirements, which needs to be solved. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a vacuum extraction device for the hot-in and cold-out impregnation process of special carbon products, which adopts a Roots vacuum pump and can achieve multiple high-efficiency and high-quality filtration treatments on the extracted gas to solve the above problems.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a vacuum extraction device for a hot-in and cold-out impregnation process of special carbon products, comprising a vacuum main pipe, a conveying pipe, two vacuum branches and two groups of filtering mechanisms, wherein the vacuum main pipe is connected to the middle of the conveying pipe, and the two vacuum branches are respectively connected to the two ends of the conveying pipe, and the vacuum main pipe and the two vacuum branches are provided with control valves, and each group of filtering mechanisms comprises a front Roots vacuum pump, a filter and a rear Roots vacuum pump, and the front Roots vacuum pumps of the two groups of filtering mechanisms correspond to the two vacuum branches one by one and their air extraction ports are connected to the corresponding vacuum branches, and the filter comprises a horizontally arranged filter box and a vertically fixed filter box on the top outside the filter box. A filter cartridge on the top, a first air inlet hood is provided on the right side of the filter cartridge, and a first air outlet hood is provided on the left side, a second air inlet hood is provided on the left side of the filter box, and a second air outlet hood is provided on the right side, the small-diameter end of the first air inlet hood is detachably connected to the air outlet of the corresponding front Roots vacuum pump, and the large-diameter end is fixedly connected to the filter cartridge, the large-diameter end of the first air outlet hood is fixedly connected to the filter cartridge, and the small-diameter end is fixedly connected to the small-diameter end of the second air inlet hood, the large-diameter end of the second air inlet hood is fixedly connected to the filter box, the large-diameter end of the second air outlet hood is fixedly connected to the filter box, and the small-diameter end is detachably connected to the air exhaust port of the corresponding rear Roots vacuum pump, and the inner of the filter box A double-axle extension motor is fixed on the top, and a support seat is vertically fixed on the inner bottom. The two output shafts of the double-axle extension motor face the upper and lower sides respectively and are coaxially arranged with the filter cartridge. The output shaft on the upper side of the double-axle extension motor extends into the filter cartridge and is coaxially fixedly connected to the first filter screen cartridge, and a driving bevel gear is fixedly sleeved on the output shaft on the lower side. A rotating shaft is horizontally penetrated and rotatably provided on the upper part of the support seat, and a driven bevel gear is fixedly sleeved on the right side of the rotating shaft. The driven bevel gear is vertically meshed with the driving bevel gear, and the left end of the rotating shaft is fixedly connected to the first rotating arm, and an internal gear is fixedly provided on the filter box on the left side of the first rotating arm. An external gear is meshedly connected, the right side of the external gear is rotatably connected to the first rotating arm, and the left side is fixedly connected to the second rotating arm, a guide column is vertically fixedly arranged in the filter box on the left side of the second rotating arm, a sliding sleeve is provided on the guide column, the right side of the sliding sleeve is rotatably connected to the second rotating arm, and the left side is fixedly connected to the filter box, the right end of the rotating shaft is coaxially fixedly connected to the second filter screen cylinder, a plurality of filter branch screen cylinders are radially fixedly connected on the outer peripheral side of the second filter screen cylinder, the outer surface cover of the first filter screen cylinder is provided with a filter cloth made of non-woven fabric, and the first filter screen cylinder, the filter screen box, the second filter screen cylinder and the filter branch screen cylinders are all filled with tar adsorption material.

[0005] Preferably, the air outlet of the front Roots vacuum pump is connected with a first hose, and the first hose is connected with the corresponding small-diameter end of the first air inlet hood through a first quick connector.

[0006] Preferably, the air inlet of the rear-mounted Roots vacuum pump is connected with a second hose, and the second hose is connected with the corresponding small-diameter end of the second air outlet hood through a second quick connector.

[0007] Preferably, the front Roots vacuum pump, the rear Roots vacuum pump and the bottom of the filter box are all fixedly connected to a base.

[0008] Preferably, the base is made of foam aluminum.

[0009] Preferably, an inverted U-shaped bracket is fixedly provided on both left and right sides of the top of the base corresponding to the filter box along the front-to-back direction, a hydraulic cylinder is vertically fixedly provided on the horizontal part of the bracket, the piston rod of the hydraulic cylinder faces downward and is fixedly connected to a lifting plate, a through groove for the lifting plate to pass through is provided on the base corresponding to the lifting plate, and casters are installed on both front and back sides of the bottom of the lifting plate.

[0010] The beneficial effects of the present invention are as follows: when in use, the vacuum main pipe is connected with the exhaust port of the impregnation tank, the outlet ports of the rear Roots vacuum pumps of the two groups of filtering mechanisms are connected with the subsequent processing steps, and the two groups of filtering mechanisms are used in one and reserved in the other, that is, when performing a vacuum operation, the control valves on the vacuum main pipe and one vacuum branch pipe are opened, and the control valve on the other vacuum branch pipe is closed, so that one group of filtering mechanisms works and the other does not work. The specific working process is: under the mutual cooperation of the front Roots vacuum pump and the rear Roots vacuum pump, the impregnation tank can be effectively vacuumed to extract the excess gas in the impregnation tank, and the gas can flow through the vacuum main pipe, the delivery pipe, the corresponding unblocked vacuum branch pipe, and the corresponding front Roots vacuum pump in sequence. After installing a Roots vacuum pump, a corresponding filter and a corresponding post-Roots vacuum pump, the gas is discharged to subsequent processing procedures. Compared with traditional conventional vacuum pumps, Roots vacuum pumps have the characteristics of high efficiency, low noise, no oil pollution and high reliability, and are safer to use. The dust and tar in the extracted gas can be effectively intercepted and filtered through the filter. The specific process is: the extracted gas can first be dispersed into the filter cartridge through the first air inlet hood, flow through the filter cartridge from right to left, and then be collected to the first air outlet hood for discharge, and then dispersed into the filter box through the second air inlet hood, flow through the filter box from left to right, and then be collected to the second air outlet hood for discharge. During the process, the double-axle extension motor is started, and the output shaft on the upper side can drive the first The filter screen cylinder rotates as a whole, and the output shaft on its lower side can drive the rotating shaft to rotate through the bevel gear transmission. The rotation of the rotating shaft can drive the first rotating arm and the second filter screen cylinder on its left and right sides to rotate. The rotation of the first rotating arm can drive the outer gear to revolve orbitally. Under the action of the meshing of the inner gear and the outer gear, the outer gear revolves orbitally and also rotates on its own, thereby driving the second rotating arm to revolve orbitally and rotate on its own. Under the rotation connection between the second rotating arm and the sliding sleeve and the sliding arrangement of the sliding sleeve and the guide column, the sliding sleeve can make an up and down reciprocating sliding motion on the guide column, driving the filter screen box to reciprocate up and down, that is, driven by the double-axis extension motor, through the synergistic effect of the corresponding transmission, the first filter screen cylinder and the second filter screen cylinder can be vertically relative to each other. The straight rotational motion and the up-and-down reciprocating motion of the filter box make it possible for the gas to be first processed by the filter cloth on the outer surface of the first filter cylinder when it flows through the filter cylinder. The filter cloth made of non-woven fabric can effectively intercept and filter impurities such as dust in the extracted gas and can preliminarily filter the tar in the extracted gas. Then the gas enters the first filter cylinder, and the tar adsorption material in the first filter cylinder can be used to adsorb the gas. Since the first filter cylinder is in a rotating state, it can drive the gas flowing through to swirl, so that the gas flowing through can fully contact with the tar adsorption material in the first filter cylinder, which can greatly enhance the adsorption effect and make the filtration quality better. Then, the gas enters the filter box, and the up-and-down reciprocating motion of the filter box makes the tar adsorption material in it move evenly, and it can also fully contact and adsorb with the gas, thereby further effectively removing the tar in the gas.Afterwards, through the cooperation of the rotating second filter screen cylinder and the multiple radially arranged filter support screen cylinders on it, the gas flowing through can be stirred and mixed more efficiently and with higher quality, so that the corresponding tar adsorption material can further fully contact and adsorb with the gas, and the gas can be further filtered and purified again. In this way, multiple efficient and high-quality interception and adsorption filtration and purification treatments of the extracted gas can be achieved, the overall filtration and purification efficiency and quality are higher, the overall safety and environmental protection can better meet the requirements, and it is safer and more environmentally friendly;. In addition, after working for a period of time, when the filtering effect of the working filtering mechanism is significantly reduced, the control valve on the vacuum branch pipe corresponding to another group of filtering mechanisms can be opened, and the control valve on the vacuum branch pipe corresponding to the group of filtering mechanisms can be closed to switch to another group of filtering mechanisms for work. At the same time, the filter of the group of filtering mechanisms can be replaced to ensure its subsequent use quality. During replacement, the connection between the corresponding filter and the front Roots vacuum pump and the rear Roots vacuum pump of the same group can be quickly disconnected through the detachable connection between the first air inlet hood and the air outlet of the front Roots vacuum pump and the detachable connection between the second air outlet hood and the air suction port of the rear Roots vacuum pump, and the original filter can be quickly removed from the system, and then a new filter can be taken and connected to the corresponding system through the corresponding detachable connection, and then it can be waited for subsequent work. In this way, the overall filtering effect and quality can be better guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a left-side structural schematic diagram of the filter of the present invention; Figure 3 It is a schematic diagram of the top view of the filter of the present invention; Figure 4 It is a left-side structural schematic diagram of the internal gear of the present invention; Figure 5 It is a left-side structural schematic diagram of a base corresponding to the filter of the present invention.

[0012] The numbers in the figure are: 1 is the vacuum main pipe, 2 is the delivery pipe, 3 is the vacuum branch pipe, 4 is the control valve, 5 is the front Roots vacuum pump, 6 is the filter, 7 is the rear Roots vacuum pump, 8 is the filter box, 9 is the filter cartridge, 10 is the first air inlet cover, 11 is the first air outlet cover, 12 is the second air inlet cover, 13 is the second air outlet cover, 14 is the double-axle extension motor, 15 is the support seat, 16 is the first filter screen cartridge, 17 is the driving bevel gear, 18 is the rotating shaft, 19 is the driven bevel gear, 20 is the is the first rotating arm, 21 is the internal gear, 22 is the external gear, 23 is the second rotating arm, 24 is the guide column, 25 is the sliding sleeve, 26 is the filter screen box, 27 is the second filter screen cylinder, 28 is the filter support screen cylinder, 29 is the filter cloth, 30 is the tar adsorbent material, 31 is the first hose, 32 is the first quick connector, 33 is the second hose, 34 is the second quick connector, 35 is the base, 36 is the bracket, 37 is the hydraulic cylinder, 38 is the lifting plate, 39 is the through slot, and 40 is the caster. DETAILED DESCRIPTION

[0013] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: like Figures 1 to 5As shown, a vacuum pumping device for a hot-in and cold-out impregnation process of special carbon products comprises a vacuum main pipe 1, a delivery pipe 2, two vacuum branches 3 and two groups of filtering mechanisms. The vacuum main pipe 1 is connected to the middle of the delivery pipe 2, and the two vacuum branches 3 are respectively connected to the two ends of the delivery pipe 2. A control valve 4 is provided on the vacuum main pipe 1 and the two vacuum branches 3. Each group of filtering mechanisms comprises a front Roots vacuum pump 5, a filter 6 and a rear Roots vacuum pump 7. The front Roots vacuum pumps 5 of the two groups of filtering mechanisms correspond to the two vacuum branches 3 one by one, and their air extraction ports are connected to the corresponding vacuum branches 3. The filter 6 includes a horizontally arranged filter box 8 and a filter cartridge 9 vertically fixed on the outer top of the filter box 8. A first air inlet hood 10 is provided on the right side of the filter cartridge 9, and a first air outlet hood 11 is provided on the left side. A second air inlet hood 12 is provided on the left side of the filter box 8, and a second air outlet hood 13 is provided on the right side. The small-diameter end of the first air inlet hood 10 is detachably connected to the air outlet of the corresponding front Roots vacuum pump 5, and the large-diameter end is fixedly connected to the filter cartridge 9. The large-diameter end of the first air outlet hood 11 is fixedly connected to the filter cartridge 9, and the small-diameter end is fixedly connected to the small-diameter end of the second air inlet hood 12. The large-diameter end of the second air inlet hood 12 is fixedly connected to the filter box 8. The large-diameter end of the second air outlet hood 13 is fixedly connected to the filter box 8, and the small-diameter end is detachably connected to the exhaust port of the corresponding rear Roots vacuum pump 7. A double-axle extension motor 14 is fixedly mounted on the inner top of the filter box 8, and a support seat 15 is vertically fixed on the inner bottom. The two output shafts of the double-axle extension motor 14 face the upper and lower sides respectively and are coaxially arranged with the filter cylinder 9. The output shaft on the upper side of the double-axle extension motor 14 extends into the filter cylinder 9 and is coaxially fixedly connected with the first filter screen cylinder 16, and the output shaft on the lower side is fixedly sleeved with a driving bevel gear 17. A rotating shaft 18 is horizontally penetrated and rotatably provided on the upper part of the support seat 15, and a driven bevel gear 19 is fixedly sleeved on the right side of the rotating shaft 18, and the driven bevel gear 19 is vertically meshed and connected with the driving bevel gear 17. The left end of the rotating shaft 18 is fixedly connected with a first rotating arm 20, and an internal gear 21 is fixedly mounted in the filter box 8 on the left side of the first rotating arm 20, and an external gear 22 is meshedly connected to the internal gear 21. The right side of the external gear 22 is rotatably connected to the first rotating arm 20, and the left side is fixedly connected to the second rotating arm 23. A guide column 24 is vertically fixedly arranged in the filter box 8 on the left side of the second rotating arm 23, and a sliding sleeve 25 is slidably sleeved on the guide column 24. The right side of the sliding sleeve 25 is rotatably connected to the second rotating arm 23, and the left side is fixedly connected to a filter screen box 26. The right end of the rotating shaft 18 is coaxially fixedly connected with a second filter screen cylinder 27, and a plurality of filter branch screen cylinders 28 are radially fixedly connected to the outer peripheral side of the second filter screen cylinder 27. The outer surface of the first filter screen cylinder 16 is covered with a filter cloth 29 made of non-woven fabric, and the first filter screen cylinder 16, the filter screen box 26, the second filter screen cylinder 27 and the filter branch screen cylinder 28 are all filled with tar adsorbent material 30; When in use, the vacuum main pipe 1 is connected with the exhaust port of the impregnation tank (not shown in the figure, the existing technology can be used), and the outlet of the rear Roots vacuum pump 7 of the two groups of filtering mechanisms is connected with the subsequent processing process. The two groups of filtering mechanisms are used in one and the other is reserved, that is, when the vacuum operation is performed, the vacuum main pipe 1 and the control valve 4 on a vacuum branch pipe 3 are opened, and the control valve 4 on the other vacuum branch pipe 3 is closed, so that one group of filtering mechanisms works and the other does not work. The specific working process is: under the mutual cooperation of the front Roots vacuum pump 5 and the rear Roots vacuum pump 7, the impregnation tank can be effectively vacuumed, the excess gas in the impregnation tank can be extracted, and the gas can flow through the vacuum main pipe 1, the delivery pipe 2, the corresponding unblocked vacuum branch pipe 3, and the corresponding front Roots vacuum pump 5 in sequence. , the corresponding filter 6 and the corresponding post-roots vacuum pump 7 are discharged to the subsequent processing process. Compared with the traditional conventional vacuum pump, the roots vacuum pump has the characteristics of high efficiency, low noise, no oil pollution and high reliability, and is safer to use. The dust and tar in the extracted gas can be effectively intercepted and filtered through the filter 6. The specific process is: the extracted gas can first be dispersed into the filter cylinder 9 through the first air inlet hood 10, and then flow through the filter cylinder 9 from right to left and then be collected to the first air outlet hood 11 for discharge, and then dispersed into the filter box 8 through the second air inlet hood 12, and flow through the filter box 8 from left to right and then be collected to the second air outlet hood 13 for discharge. During the process, the double-axis extension motor 14 is started, and the output shaft on the upper side can drive the first filter screen cylinder 16 to rotate as a whole, and the lower side thereof The output shaft can drive the rotating shaft 18 to rotate through the bevel gear transmission. The rotation of the rotating shaft 18 can drive the first rotating arm 20 and the second filter screen cylinder 27 on its left and right sides to rotate. The rotation of the first rotating arm 20 can drive the outer gear 22 to revolve. Under the action of the meshing of the inner gear 21 and the outer gear 22, the outer gear 22 revolves and rotates at the same time, thereby driving the second rotating arm 23 to revolve and rotate. Under the rotation connection between the second rotating arm 23 and the sliding sleeve 25 and the sliding setting of the sliding sleeve 25 and the guide column 24, the sliding sleeve 25 can make a reciprocating sliding motion up and down on the guide column 24, driving the filter screen box 26 to reciprocate up and down, that is, under the drive of the double-axle extension motor 14, the first filter screen cylinder 16 and the second filter screen cylinder 27 can be realized through the synergistic effect of the corresponding transmission. The mutually perpendicular rotational motion and the up and down reciprocating motion of the filter box 26 enable the gas to be first processed by the filter cloth 29 on the outer surface of the first filter cylinder 16 when passing through the filter cylinder 9. The filter cloth 29 made of non-woven fabric can effectively intercept and filter impurities such as dust in the extracted gas and can preliminarily filter the tar in the extracted gas. Then the gas enters the first filter cylinder 16, and the tar adsorption material 30 in the first filter cylinder 16 can be used to adsorb the gas. Since the first filter cylinder 16 is in a rotating state, it can drive the flowing gas to swirl, so that the flowing gas can fully contact the tar adsorption material 30 in the first filter cylinder 16, which can greatly enhance the adsorption effect and make the filtering quality better.Next, the gas enters the filter box 8, and the filter mesh box 26 that moves up and down reciprocates makes the tar adsorption material 30 inside it move evenly, and can also fully contact and adsorb with the gas, thereby further effectively removing the tar in the gas. Afterwards, through the cooperation of the rotating second filter mesh cylinder 27 and the multiple radially arranged filter support mesh cylinders 28 thereon, the gas flowing through can be stirred and mixed more efficiently and with higher quality, so that the corresponding tar adsorption material 30 can further fully contact and adsorb with the gas, and can further filter and purify the gas again. In this way, multiple efficient and high-quality interception and adsorption filtration and purification treatments of the extracted gas can be achieved, the overall filtration and purification efficiency and quality are higher, the overall safety and environmental protection can better meet the requirements, and it is safer and more environmentally friendly;. In addition, after working for a period of time, when the filtering effect of the working filtering mechanism is significantly reduced, the control valve 4 on the vacuum branch pipe 3 corresponding to another group of filtering mechanisms can be opened, and the control valve 4 on the vacuum branch pipe 3 corresponding to the group of filtering mechanisms can be closed, and the work of another group of filtering mechanisms can be switched. At the same time, the filter 6 of the group of filtering mechanisms can be replaced to ensure its subsequent use quality. When replacing, the connection between the corresponding filter 6 and the front Roots vacuum pump 5 and the rear Roots vacuum pump 7 of the same group can be quickly disconnected through the detachable connection between the first air inlet hood 10 and the air outlet of the front Roots vacuum pump 5 and the detachable connection between the second air outlet hood 13 and the air suction port of the rear Roots vacuum pump 7, and the original filter 6 can be quickly removed from the system, and then a new filter 6 can be taken and connected to the corresponding system through the corresponding detachable connection, and then it can be waited for subsequent work. In this way, the overall filtering effect and quality can be better guaranteed. The tar adsorption material 30 can be made of existing activated carbon and other materials.

[0014] In this embodiment, a first hose 31 is connected to the air outlet of the front Roots vacuum pump 5, and the first hose 31 is connected to the small-diameter end of the corresponding first air inlet hood 10 through a first quick connector 32, so that the first air inlet hood 10 and the first hose 31 can be quickly disassembled and assembled, which is convenient for cooperating to realize the replacement of the filter 6.

[0015] In this embodiment, a second hose 33 is connected to the air inlet of the rear Roots vacuum pump 7, and the second hose 33 is connected to the small-diameter end of the corresponding second air outlet hood 13 through a second quick connector 34, so that the second air outlet hood 13 and the second hose 33 can be quickly disassembled and assembled, which is convenient for cooperating to achieve replacement of the filter 6.

[0016] In this embodiment, the bottoms of the front Roots vacuum pump 5, the rear Roots vacuum pump 7 and the filter box 8 are all fixedly connected with a base 35 for supporting and fixing the corresponding equipment.

[0017] In this embodiment, the base 35 is made of foam aluminum. Foam aluminum is an existing material with excellent damping, energy absorption, shock absorption, corrosion resistance and other characteristics. It has a long service life and can play a good role in buffering, shock absorption and protection, which is more conducive to the smooth operation of the corresponding equipment.

[0018] In this embodiment, an inverted U-shaped bracket 36 is fixedly provided on both sides of the top of the base 35 corresponding to the filter box 8 along the front-to-back direction, and a hydraulic cylinder 37 is vertically fixedly provided on the horizontal part of the bracket 36. The piston rod of the hydraulic cylinder 37 faces downward and is fixedly connected to a lifting plate 38. A through groove 39 for the lifting plate 35 to pass through is provided on the base 35 corresponding to the lifting plate 38, and casters 40 are installed on both sides of the front and back of the bottom of the lifting plate 38. When it is necessary to replace the filter 6 in one group of filter mechanisms, after switching to another group of filter mechanisms and stopping the current group of filter mechanisms, first disconnect the connection between the first hose 31 and the first air inlet hood 10 through the corresponding first quick connector 32, disconnect the connection between the second hose 33 and the second air outlet hood 13 through the second quick connector 34, and then operate the hydraulic cylinder 37 to extend its piston rod and drive the lifting plate 38 to move down until the caster 40 is placed on the ground and the corresponding base 35 is suspended. Then, the four casters 40 can be used to control the flexible movement of the entire filter 6, which is more conducive to quickly removing the original filter 6 from the filtering station. Next, take a new filter 6, first quickly move it to the filtering station through the corresponding casters 40, and then operate the corresponding hydraulic cylinder 37 to shrink its piston rod and drive the corresponding lifting plate 38 to move up until the base 35 is placed on the ground and the casters 40 are suspended. Then, the new filter 6 can be fixed to prevent the filter 6 from moving at will, which is convenient for subsequent use. Afterwards, the first hose 31 is connected to the first air inlet hood 10 again through the first quick connector 32 , and the second hose 33 is connected to the second air outlet hood 13 through the second quick connector 34 .

[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum pumping device for hot-in and cold-out impregnation process of special carbon products, characterized in that: It includes a vacuum main pipe, a delivery pipe, two vacuum branches and two groups of filtering mechanisms. The vacuum main pipe is connected to the middle of the delivery pipe, and the two vacuum branches are respectively connected to the two ends of the delivery pipe. The vacuum main pipe and the two vacuum branches are provided with control valves. Each group of filtering mechanisms includes a front Roots vacuum pump, a filter and a rear Roots vacuum pump. The front Roots vacuum pumps of the two groups of filtering mechanisms correspond to the two vacuum branches one by one and their suction ports are connected to the corresponding vacuum branches. The filter includes a horizontally arranged filter box and a filter cartridge vertically fixed on the top of the filter box. The right side of the filter cartridge is provided with a first air inlet hood and the left side is provided with a first air outlet. A cover, a second air inlet cover is provided on the left side of the filter box, and a second air outlet cover is provided on the right side, the small-diameter end of the first air inlet cover is detachably connected to the air outlet of the corresponding front Roots vacuum pump, and the large-diameter end is fixedly connected to the filter cartridge, the large-diameter end of the first air outlet cover is fixedly connected to the filter cartridge, and the small-diameter end is fixedly connected to the small-diameter end of the second air inlet cover, the large-diameter end of the second air inlet cover is fixedly connected to the filter box, the large-diameter end of the second air outlet cover is fixedly connected to the filter box, and the small-diameter end is detachably connected to the air suction port of the corresponding rear Roots vacuum pump, the inner top of the filter box is fixedly provided with a double-axle extension motor, and the inner bottom is fixedly provided with a vertical fixed bracket. A support seat is provided, and the two output shafts of the double-axis extension motor are respectively oriented to the upper and lower sides and are coaxially arranged with the filter cartridge. The output shaft on the upper side of the double-axis extension motor extends into the filter cartridge and is coaxially fixedly connected with the first filter screen cartridge, and a driving bevel gear is fixedly sleeved on the output shaft on the lower side. A rotating shaft is horizontally penetrated and rotatably provided on the upper part of the support seat, and a driven bevel gear is fixedly sleeved on the right side of the rotating shaft, and the driven bevel gear is vertically meshed with the driving bevel gear. The left end of the rotating shaft is fixedly connected with a first rotating arm, and an internal gear is fixedly mounted in the filter box on the left side of the first rotating arm, and an external gear is meshed on the internal gear. The right side of the external gear is rotatably connected to the first rotating arm, and the left side is fixedly connected to the second rotating arm, a guide column is vertically fixedly provided in the filter box on the left side of the second rotating arm, a sliding sleeve is provided on the guide column, the right side of the sliding sleeve is rotatably connected to the second rotating arm, and the left side is fixedly connected to the filter box, the right end of the rotating shaft is coaxially fixedly connected to the second filter screen cylinder, a plurality of filter branch screen cylinders are radially fixedly connected on the outer peripheral side of the second filter screen cylinder, the outer surface cover of the first filter screen cylinder is provided with a filter cloth made of non-woven fabric, and the first filter screen cylinder, the filter screen box, the second filter screen cylinder and the filter branch screen cylinder are all filled with tar adsorption material.

2. The vacuum pumping device for the hot-in and cold-out impregnation process of special carbon products according to claim 1 is characterized in that: The air outlet of the front Roots vacuum pump is connected with a first hose, and the first hose is connected with the corresponding small-diameter end of the first air inlet hood through a first quick connector.

3. The vacuum pumping device for the hot-in and cold-out impregnation process of special carbon products according to claim 1 is characterized in that: The air inlet of the rear-mounted Roots vacuum pump is connected with a second hose, and the second hose is connected with the corresponding small-diameter end of the second air outlet hood through a second quick connector.

4. The vacuum pumping device for the hot-in and cold-out impregnation process of special carbon products according to claim 1 is characterized in that: The front Roots vacuum pump, the rear Roots vacuum pump and the bottom of the filter box are all fixedly connected with a base.

5. The vacuum pumping device for the hot-in and cold-out impregnation process of special carbon products according to claim 4 is characterized in that: The base is made of foam aluminum.

6. The vacuum pumping device for the hot-in and cold-out impregnation process of special carbon products according to claim 4 is characterized in that: An inverted U-shaped bracket is fixedly provided on both left and right sides of the top of the base corresponding to the filter box along the front-to-back direction, a hydraulic cylinder is vertically fixedly provided on the horizontal part of the bracket, the piston rod of the hydraulic cylinder faces downward and is fixedly connected to a lifting plate, a through groove for the lifting plate to pass through is provided on the base corresponding to the lifting plate, and casters are installed on both front and back sides of the bottom of the lifting plate.

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