A pulping and feeding device for refined pulp

Abstract

This invention discloses a pulping and delivery device for refined pulp, relating to the field of refined pulp spraying equipment. It includes a mixing tank, a waste pulp structure, and a screw pump. The mixing tank is vertically fixed to a base, with a cleaning device on its inner wall and a filter device at its center. The mixing tank is connected to the waste pulp structure via a flange at its bottom. The waste pulp structure's outlet pipe is fixed obliquely upwards to the tank body. The waste pulp structure is connected to the screw pump via a flexible hose. The screw pump is vertically fixed to the base and has a water spray nozzle, a first air spray nozzle, and a second air spray nozzle, allowing for water and air washing of the screw pump and pulp pipeline, as well as backwashing of the filter device in the mixing tank. This invention has a simple structure, is easy to operate, does not splash mud during mixing, can filter mud residue, and uses a combination of air and water washing for more convenient and thorough cleaning, resulting in good cleaning effect and reducing the likelihood of clogging the pulp pipeline.

Description

Technical Field

[0001] This invention relates to a paste spraying equipment, specifically a paste preparation and delivery device. Background Technology

[0002] Prestressed concrete cylinder pipes (PCCPs) are widely used in major water diversion and transfer projects in my country, such as the South-to-North Water Diversion Project, and in urban water supply network construction projects, due to their excellent characteristics of large diameter, high working pressure, deep overburden, and long distance. The durability of the prestressed high-strength steel wires wound on the core of the PCCP directly affects its structural safety. The national standard GB / T19685, "Prestressed Concrete Cylinder Pipes," requires that a cement paste with a specified water-cement ratio be sprayed on the surface of the steel wires during the winding process to provide the first effective layer of protection. The cement paste on the steel wire surface has a water-cement ratio of 0.625, exhibiting strong viscosity and a rapid setting speed. After 45 minutes, the mixed slurry begins to set, producing sludge. If cleaning is not timely or thorough, this sludge will solidify on the mixing tank or the inner wall of the slurry pipes. Typically, workers directly use water hoses to clean the mixing tank, and the wastewater flows through the nozzles along the slurry pipes, thus cleaning the pipes. This manual cleaning method is laborious, and if workers lack responsibility, the cleaning may be inadequate, causing the sludge to solidify thicker and thicker on the inner wall of the mixing tank and in the pipes, easily clogging the slurry pipes.

[0003] In addition, traditional spraying equipment involves the slurry first passing through a sedimentation tank after exiting the mixing tank before flowing into the slurry pipeline for spraying. This results in a complex equipment structure, a large footprint, and inconvenient cleaning of the slurry pipeline after exiting the mixing tank, which is prone to clogging.

[0004] Screw pumps used for conveying mud are generally horizontal in structure, with a gap between the bottom of the conveying rod and the cylinder wall. Since mud is heavy, it tends to settle on the cylinder wall. Traditional screw pumps are also difficult to clean. Over time, a thick layer of mud will solidify at the bottom of the cylinder wall, affecting the conveying of mud and easily generating mud sludge that can clog the slurry path. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a pulping and feeding device for clean pulp, which has a simple structure, is easy to operate, does not splash mud during stirring, can filter mud residue, is easy to clean, has a good cleaning effect, and is not easy to clog the pulping pipeline.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a pulping and feeding device for clean pulp, including a mixing tank, a pulp disposal structure, and a screw pump. The mixing tank is fixedly connected to the first valve of the pulp disposal structure through a mixing tank outlet pipe flange fixed on the discharge pipe. The discharge pipe of the pulp disposal structure is connected to the screw pump through a feeding pulp hose.

[0007] The mixing tank includes a tank body fixed to a base. A cleaning pipe is fixed to the upper part of the tank body against the inner wall via a support block. The cleaning pipe is connected to an external water source via a water pump. An anti-splash structure is fixed to the lower inner wall of the tank body. A filter cylinder is fixed to the center of the bottom of the tank body. A slurry outlet pipe is provided below the tank body, and a flange is fixed to the end of the slurry outlet pipe. A mixing shaft is provided at the center line of the tank body. A mixing blade is fixed to the end of the mixing shaft. A mixing shaft bracket is provided at the position where the mixing shaft extends out of the tank body. The mixing shaft bracket is equipped with a bearing. The mixing shaft bracket is fixedly connected to a motor bracket. The motor is fixedly connected to the motor bracket. The motor is connected to the mixing shaft via a coupling. The mixing shaft bracket is fixedly connected to the base.

[0008] The slurry disposal structure includes a cylinder, with a first flange and a second flange fixed at both ends of the cylinder. The first flange is fixedly connected to one end of a first valve, and the other end of the first valve is fixedly connected to the slurry outlet pipe flange of the mixing tank. The second flange is fixedly connected to one end of a second valve, and the other end of the second valve is fixedly connected to a flange on a connecting body. The outer wall of the connecting body opposite to its flange is threaded, and the slurry outlet pipe is fixedly connected to the cylinder between the first flange and the second flange.

[0009] The screw pump includes a screw pump body, which is vertically fixed on a screw pump bracket. The screw pump body is equipped with a drive motor, which is electrically connected to a frequency converter. The screw pump body includes a feeding section and a discharge section. The feeding section is provided with a feeding port, a water spray port, and a first air spray port. The feeding port is connected to a feeding slurry hose via a flange. The water spray port is connected to a water source via a cleaning machine. The first air spray port is connected to an air source via a second solenoid valve. The discharge section is provided with a discharge port and a second air spray port. The discharge port is connected to a discharge slurry hose via a flange. The second air spray port is connected to an air source via a first solenoid valve.

[0010] Preferably, the cleaning pipe is an annular tube made of polytetrafluoroethylene, closely attached to the inner wall of the tank, and has several spray holes evenly distributed close to and facing the inner wall of the mixing tank.

[0011] Preferably, the anti-splash structure consists of at least two rectangular steel plates, which are symmetrically welded upwards to the inner wall of the barrel and located above the stirring blades.

[0012] Preferably, the filter cylinder has a hollow cavity structure, and its sidewalls are evenly provided with a plurality of filter holes. The filter cylinder is welded and fixed to the center of the bottom of the barrel.

[0013] Preferably, both the first flange and the second flange are welded and fixedly connected to the cylinder, and both the first valve and the second valve are wafer-type electric disc valves.

[0014] Preferably, the outlet of the slurry pipe is welded and fixed to the cylinder at an acute angle with the outlet of the slurry pipe facing upwards, and the outer wall of the outlet of the slurry pipe is provided with threads.

[0015] Preferably, the screw pump body is a G-type screw pump, and the drive motor is an electromagnetic speed-regulating motor with its speed adjusted by a frequency converter.

[0016] Preferably, both the first and second solenoid valves are connected to a water vapor filter via air pipes, and a pressure transmitter is connected to the second jet port and the first solenoid valve via an air pipe.

[0017] Preferably, the water spray nozzle of the screw pump feeding section is threaded and is fixedly connected to the water pipe through the thread, and both the first air spray nozzle and the second air spray nozzle are threaded and are fixedly connected to the air pipe through the thread.

[0018] The beneficial effects of adopting the above technical solution are as follows:

[0019] 1. This invention features a circular cleaning pipe with spray nozzles at the top of the bucket, preventing mud from sticking. Workers simply need to turn on the water pump, and water is sprayed directly onto the inner wall of the bucket through the nozzles. The water flows from the top to the bottom of the inner wall, cleaning the entire inner wall of the mixing bucket. This is simple, labor-saving, and provides excellent cleaning results. The filter cylinder at the bottom of the bucket filters out mud and debris from the slurry, preventing blockage of the slurry path. The inner wall of the mixing bucket is welded with an anti-splash structure, preventing the slurry from rotating and splashing out of the mixing bucket during high-speed mixing, thus saving materials.

[0020] 2. The discharge pipe of the present invention is set at an angle upward, so that the mud in the mud settles in the cylinder due to gravity to form a sedimentation tank. The sediment can be discharged by opening the second valve at regular intervals, without the need to set up an additional sedimentation tank. The structure is simple and easy to operate. At the same time, the waste slurry structure is equipped with a first valve and a second valve, which makes it easy to discharge slurry, collect waste slurry and clean the slurry path.

[0021] 3. This invention employs a vertically installed screw pump, preventing slurry deposition in the pump from the source. Water spray nozzles and air jets are installed in the feeding section, allowing water to spray and flush the feeding section. During flushing, the air source connected to the air jets can be opened to mix water and air for further flushing. While the screw pump is running, water flows down the feeding section, flushing it as well. The water then flows from the feeding section into the discharge section and finally into the slurry pipeline, cleaning the pipeline as well. During spraying, if the slurry path downstream of the screw pump becomes blocked, the pressure transmitter sends a signal, and the air jets in the discharge section begin to spray high-pressure gas to clear the blockage and ensure continuous operation of the equipment.

[0022] 4. After the air source connected to the jet port of the screw pump feeding section is turned on, the high-pressure gas not only clears the screw pump, but also comes out through the filter hole of the filter device in the mixing tank along the waste slurry structure, thereby washing away the mud and sludge adhering to the filter device, realizing backwashing of the filter device and preventing the filter device from clogging.

[0023] 5. The present invention combines water washing and air washing for pulp preparation and pulp delivery. It is simple to operate, has a good cleaning effect, and the pulp pipeline is not easily blocked. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] In the diagram: 1. Mixing tank 101, Motor 102, Motor bracket 103, Coupling 104, Mixing shaft bracket 105, Support block 106, Cleaning pipe 107, Base 108, Mixing shaft 109, Tank body 110, Anti-splash structure 111, Mixing blades 112, Filter cylinder 113, Slurry discharge pipe 2. Slurry disposal structure 201, Mixing tank slurry discharge pipe flange 202, First valve 203, First flange 204, Slurry discharge pipe 205, Tank body 206, Second flange 207, Second valve 208. Connector 3, screw pump 301, frequency converter 302, feed port 303, drive motor 304, screw pump body 305, screw pump bracket 306, water spray nozzle 307, first air jet nozzle 308, first solenoid valve 309, second solenoid valve 310, pressure transmitter 311, water vapor filter 312, cleaning machine 313, second air jet nozzle 314, discharge port 315, air source 316, water source 317, air pipe 318, water pipe 319, feed slurry hose 320, discharge slurry hose. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Reference Figure 1 A pulping and feeding device for a paste includes a mixing tank 1, a waste pulp structure 2, and a screw pump 3. The mixing tank 1 is fixedly connected to the first valve 202 of the waste pulp structure 2 via a mixing tank outlet pipe flange 201 fixed on the discharge pipe 113. The outlet pipe 204 of the waste pulp structure 2 is connected to the screw pump 3 via a feeding pulp hose 319.

[0028] The mixing tank 1 includes a tank body 109, which is fixed to a base 107. A cleaning pipe 106 is fixed to the upper part of the tank body 109 along the inner wall via a support block 105. The cleaning pipe 106 is connected to an external water source via a water pump. A splash-proof structure 110 is fixed to the lower inner wall of the tank body 109. A filter cylinder 112 is fixed to the center of the bottom of the tank body 109. A slurry discharge pipe 113 is provided below the tank body 109, and a flange is fixed to the end of the slurry discharge pipe. A stirring shaft 108 is provided at the center line of the tank body. A stirring blade 111 is fixed to the end of the stirring shaft 108. A stirring shaft bracket 104 is provided at the position where the stirring shaft extends out of the tank body. The stirring shaft bracket 104 is provided with a bearing. The stirring shaft bracket 104 is fixedly connected to a motor bracket 102. The motor 101 is fixedly connected to the motor bracket 102. The motor 101 is connected to the stirring shaft 108 via a coupling 103. The stirring shaft bracket 104 is fixedly connected to the base 107.

[0029] The slurry disposal structure 2 includes a cylinder 205. A first flange 203 and a second flange 206 are fixed at both ends of the cylinder 205. The first flange 203 is fixedly connected to one end of a first valve 202, and the other end of the first valve 202 is fixedly connected to a slurry outlet pipe flange 201 of the mixing tank. The second flange 206 is fixedly connected to one end of a second valve 207, and the other end of the second valve 207 is fixedly connected to a flange on a connecting body 208. A slurry outlet pipe 204 is fixedly connected to the cylinder 205 between the first flange 203 and the second flange 206.

[0030] The screw pump 3 includes a screw pump body 304, which is vertically fixed on a screw pump bracket 305. The screw pump body 304 is equipped with a drive motor 303, which is electrically connected to a frequency converter 301. The screw pump body 304 includes a feeding section and a discharge section. The feeding section is provided with a feeding port 302, a water spray port 306, and a first air jet port 307. The feeding port 302 is connected to a feeding slurry hose 319 via a flange. The water spray port 306 is connected to a water source 316 via a cleaning machine 312. The first air jet port 307 is connected to an air source 315 via a second solenoid valve 309. The discharge section is provided with a discharge port 314 and a second air jet port 313. The discharge port 314 is connected to a discharge slurry hose 320 via a flange. The second air jet port 313 is connected to the air source 315 via a first solenoid valve 308.

[0031] Furthermore, the cleaning pipe 106 is an annular tube made of polytetrafluoroethylene, closely attached to the inner wall of the barrel 109, and has several spray holes evenly distributed close to and facing the inner wall of the mixing barrel body.

[0032] Furthermore, the anti-splash structure 110 consists of at least two rectangular steel plates, which are symmetrically welded and fixed to the inner wall of the barrel 109 at an angle upward and located above the stirring blade 111.

[0033] Furthermore, the filter cylinder 112 has a hollow structure inside, and its side wall is uniformly provided with a number of filter holes. The filter cylinder 112 is welded and fixed to the bottom center of the barrel body 109.

[0034] Furthermore, both the first flange 203 and the second flange 206 are welded and fixedly connected to the cylinder 205, and both the first valve 202 and the second valve 207 are clamp electric disc valves.

[0035] Furthermore, the outlet of the slurry pipe 204 is welded and fixed to the cylinder 205 at an acute angle with the outlet facing upwards. The outer wall of the outlet of the slurry pipe 204 is provided with threads, and the outer wall of the connector 208 opposite to its flange is provided with threads.

[0036] Furthermore, the screw pump body 304 is a G-type screw pump, and the drive motor 303 is an electromagnetic speed-regulating motor whose speed is adjusted by a frequency converter 301.

[0037] Furthermore, the first solenoid valve 308 and the second solenoid valve 309 are both connected to the air source 315 via an air pipe 317 to a water vapor filter 311, and the second jet port 313 is connected to the first solenoid valve 308 via an air pipe to a pressure transmitter 310.

[0038] Furthermore, the water nozzle 306 of the screw pump feeding section is threaded and is fixedly connected to the water pipe 318 through the thread. The first air nozzle 307 and the second air nozzle 313 are both threaded and are fixedly connected to the air pipe 317 through the thread.

[0039] During pulping, the first valve 202 is closed. After pulping is completed, the second valve 207 is closed, and the first valve 202 is opened. The slurry flows from the filter holes of the mixing tank filter cylinder 112 into the waste slurry structure 2. After passing through the sediment, it flows along the upwardly inclined slurry outlet pipe 204 into the feeding section of the screw pump 3. The conveying rod is driven by an electromagnetic speed-regulating motor to send the slurry into the slurry pipeline connected below the discharge section. During slurry and slag discharge, the first valve 202 and the second valve 207 are opened. The remaining slurry and slag are discharged along the waste slurry structure 2 into the waste slag collection device connected to the connector 208.

[0040] If the slurry path after the screw pump 3 becomes blocked during the pulping process, the pressure transmitter 310 sends a signal, and the air source of the first air jet 307 in the screw pump feeding section is opened to clear the slurry path and ensure the continuous operation of the equipment.

[0041] When washing this equipment, close the first valve 202 and turn on the water pump connected to the cleaning pipe 106 of the mixing tank 1. The tank body 109 is cleaned through the cleaning pipe 106. The cleaning wastewater flows from the filter hole of the filter cylinder 112 into the waste slurry structure 2 to clean the waste slurry structure 2. If you do not want the cleaning wastewater to enter the screw pump 3, you can open the second valve 207 to discharge the cleaning wastewater. If you close the second valve 207, the cleaning wastewater flows into the feed section of the screw pump 3 along the slurry outlet pipe 204. At this time, the drive motor 303 is turned on and the screw pump 3 is running. After cleaning the screw pump 3, the cleaning wastewater flows into the slurry pipeline behind the screw pump 3 to clean the slurry pipeline behind it.

[0042] While cleaning the mixing tank 1, the second solenoid valve 309, which is connected to the cleaning machine 312 and the first jet port 307, connected to the water spray port 6 of the screw pump 3 feeding section, is opened. At the same time, the screw pump 3 is washed with water and air. The water and air mix to form a water mist. The water and air mixture enters the slurry disposal structure 2 from the slurry outlet pipe 204 through the slurry path hose 319. At this time, the second valve 207 of the slurry disposal structure 2 is closed. The water and air mixture is sprayed out from the filter hole of the filter cylinder 112 of the mixing tank 1, which flushes away the mud and sludge blocking the filter hole and clears the filter cylinder 112, thus achieving backwashing of the filter cylinder 112.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pulping and feeding device for prepared pulp, characterized in that, The system includes a mixing tank (1), a slurry disposal structure (2), and a screw pump (3). The mixing tank (1) is fixedly connected to the first valve (202) of the slurry disposal structure (2) via a mixing tank outlet pipe flange (201) fixed on the slurry discharge pipe (113). The slurry outlet pipe (204) of the slurry disposal structure (2) is connected to the screw pump (3) via a feeding slurry hose (319). The mixing tank (1) includes a tank body (109), which is fixed on a base (107). A cleaning pipe (106) is fixed to the upper part of the tank body (109) along the inner wall via a support block (105). The cleaning pipe (106) is connected to an external water source via a water pump. A splash-proof structure (110) is fixed to the lower inner wall of the tank body (109). A filter cylinder (112) is fixed to the center of the bottom of the tank body (109). A slurry discharge pipe (113) is provided below the tank body (109), and a flange is fixed to the end of the slurry discharge pipe. The center line of the tank body... A stirring shaft (108) is provided at the position, and a stirring blade (111) is fixed at the end of the stirring shaft (108). A stirring shaft bracket (104) is provided at the position where the stirring shaft extends out of the barrel. The stirring shaft bracket (104) is provided with a bearing. The stirring shaft bracket (104) is fixedly connected to a motor bracket (102). A motor (101) is fixedly connected to the motor bracket (102). The motor (101) is connected to the stirring shaft (108) through a coupling (103). The stirring shaft bracket (104) is fixedly connected to a base (107). The waste slurry structure (2) includes a cylinder (205), with a first flange (203) and a second flange (206) fixed at both ends of the cylinder (205). The first flange (203) is fixedly connected to one end of a first valve (202), and the other end of the first valve (202) is fixedly connected to the slurry outlet pipe flange (201) of the mixing tank. The second flange (206) is fixedly connected to one end of a second valve (207), and the other end of the second valve (207) is fixedly connected to a flange on a connecting body (208). The connecting body (208) has threads on the outer wall of one end opposite to its flange. A slurry outlet pipe (204) is fixedly connected to the cylinder (205) between the first flange (203) and the second flange (206). The screw pump (3) includes a screw pump body (304), which is vertically fixed on a screw pump bracket (305). The screw pump body (304) is equipped with a drive motor (303), which is electrically connected to a frequency converter (301). The screw pump body (304) includes a feeding section and a discharge section. The feeding section is provided with a feeding port (302), a water spray nozzle (306), and a first air spray nozzle (307). The feeding port (302) is connected to the discharge section via a flange. The feed slurry hose (319) is connected, the water nozzle (306) is connected to the water source (316) through the cleaning machine (312), the first air jet (307) is connected to the air source (315) through the second solenoid valve (309), the discharge section is provided with a discharge port (314) and a second air jet (313), the discharge port (314) is connected to the discharge slurry hose (320) through a flange, and the second air jet (313) is connected to the air source (315) through the first solenoid valve (308).

2. The pulping and feeding device for prepared pulp according to claim 1, characterized in that, The cleaning pipe (106) is an annular tube made of polytetrafluoroethylene. It is closely attached to the inner wall of the barrel (109) and has several spray holes evenly arranged close to and facing the inner wall of the mixing barrel.

3. The pulping and feeding device for prepared pulp according to claim 1, characterized in that, The anti-splash structure (110) consists of at least two rectangular steel plates, which are symmetrically welded and fixed to the inner wall of the barrel (109) at an angle upward and located above the stirring blade (111).

4. The pulping and feeding device for prepared pulp according to claim 1, characterized in that, The filter cylinder (112) has a hollow structure inside, and its side wall is uniformly provided with a number of filter holes. The filter cylinder (112) is welded and fixed to the bottom center of the barrel body (109).

5. The pulping and feeding device for prepared pulp according to claim 1, characterized in that, The first flange (203) and the second flange (206) are both welded and fixedly connected to the cylinder (205), and the first valve (202) and the second valve (207) are both wafer-type electric disc valves.

6. The pulping and feeding device for prepared pulp according to claim 1, characterized in that, The outlet of the slurry pipe (204) is welded and fixed to the cylinder (205) at an acute angle with the outlet facing upwards, and the outer wall of the outlet of the slurry pipe (204) is provided with threads.

7. The pulping and feeding device for prepared pulp according to claim 1, characterized in that, The screw pump body (304) is a G-type screw pump, and the drive motor (303) is an electromagnetic speed-regulating motor whose speed is adjusted by a frequency converter (301).

8. The pulping and feeding device for prepared pulp according to claim 1, characterized in that, The first solenoid valve (308) and the second solenoid valve (309) are both connected to the air source (315) via an air pipe (317) to a water vapor filter (311), and the second jet port (313) is connected to the first solenoid valve (308) via an air pipe to a pressure transmitter (310).

9. The pulping and feeding device for prepared pulp according to claim 1, characterized in that, The water nozzle (306) of the screw pump feeding section is threaded and is fixedly connected to the water pipe (318) through the thread. The first air nozzle (307) and the second air nozzle (313) are both threaded and are fixedly connected to the air pipe (317) through the thread.

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