A high-speed mixing barrel for preparing prestressed channel grouting material

Abstract

A high-speed stirring barrel for slurrying of prestressed channel grouting material comprises a stirring barrel and a stirring paddle which cooperate with each other, wherein the stirring barrel is a sealed structure, and the stirring paddle can be installed in the stirring barrel in a high-speed rotation. By designing the stirring barrel as a sealed structure and the stirring paddle to rotate at a high speed, the high-speed rotating cement particles continuously hit the barrel wall and shear each other under the action of centrifugal acceleration, so that the materials in the stirring barrel are fully disturbed, mixed evenly, and dispersed thoroughly, creating sufficient conditions for the full hydration of cement, so that the various indicators of the grouting slurry prepared are better than those prepared by the existing slurry making machine. It is suitable for slurrying of cement grouting material.

Description

Technical Field

[0001] The present invention relates to the technical field of cement grouting materials, and specifically to a high-speed stirring barrel for preparing a prestressed duct grouting material Background Art

[0002] At present, most of the existing cement-based prestressed duct grouting material mixers (hereinafter referred to as mixers) adopt a vertical stirring structure, and the stirring barrel is generally of an open structure. However, since the particles (fine particles) in the cement slurry are mostly suspended in the system in the form of flocs, the higher the concentration, the stronger the tendency of the flocs to exist, and the more difficult it is to disperse the cement particles. In this way, due to the structural reasons of the vertical stirring tank, the slurry will form a regular rotating flow field in the tank with the movement of the impeller blades, and the relative movement around the main shaft is greatly reduced, resulting in the formation of agglomerates (powder in water) of some powder materials in the slurry, which are extremely difficult to break and disperse, causing some cement to be difficult to hydrate, and thus seriously affecting the quality of the prepared slurry. Therefore, the existing open-structured stirring barrels are no longer suitable for the use requirements, and there is an urgent need to develop a new stirring barrel to solve the above problems Summary of the Invention

[0003] The purpose of the present invention is to provide a high-speed stirring barrel for preparing a prestressed duct grouting material to solve the problems raised in the above background art

[0004] To achieve the above purpose, the present invention provides the following technical solutions

[0005] A high-speed stirring barrel for preparing a prestressed duct grouting material includes a mutually cooperating stirring barrel and a stirring impeller. The stirring barrel is of a sealed structure, and the stirring impeller is rotatably installed in the stirring barrel at a high speed. By designing the stirring barrel as a sealed structure and the stirring impeller as a high-speed rotating one, the high-speed rotating cement particles, under the action of centrifugal acceleration, continuously impact the barrel wall and shear each other, so that the materials are fully disturbed, mixed evenly, and dispersed thoroughly in the stirring barrel, creating sufficient conditions for the full hydration of the cement, and thus making the various indexes of the prepared grouting material slurry better than those of the grouting material slurry prepared by the existing mixers

[0006] Preferably, the stirring barrel is of a horizontal structure. By designing the stirring barrel as a horizontal structure, with the rotation of the stirring impeller, a turbulent flow area is formed on the back surface of the impeller blades of the stirring impeller, and the slurry will flow irregularly and collide with each other in the stirring barrel, enabling the rapid dispersion of the cement particles and the full hydration of the cement molecules

[0007] Preferably, the rotation speed of the stirring paddle is greater than or equal to 400 rpm. By designing the rotation speed of the stirring paddle to be greater than or equal to 400 rpm and the linear velocity of the paddle blades of the stirring paddle to be greater than or equal to 7 m / s, in this way, the cement particles rotating at high speed are continuously impacted on the barrel wall and sheared against each other under the action of centrifugal acceleration, so that the material is fully disturbed, mixed evenly and dispersed thoroughly in the mixing barrel, creating sufficient conditions for the full hydration of cement, and thus making the grouting material slurry produced have better performance in various indicators (fluidity, bleeding rate, etc.) than the grouting material slurry produced by the existing pulp-making machine.

[0008] Preferably, the ratio of the rotation diameter of the paddle blades of the stirring paddle to the inner diameter of the mixing barrel is greater than or equal to 0.7 and less than 1. When the ratio of the rotation diameter of the paddle blades of the stirring paddle to the inner diameter of the mixing barrel is lower than 0.85, the disturbance performance of the paddle blades 2b to the slurry becomes poor. Especially in the initial stage of stirring, the mixing water will concentrate at the bottom of the mixing barrel, causing difficulty in dispersing the powder materials, which is not conducive to rapid pulp making.

[0009] Preferably, the stirring paddle includes a stirring shaft, and at least one group of paddle blades is arranged along the axial direction on the stirring shaft. Each group of paddle blades includes at least one paddle blade arranged along the circumferential direction of the stirring shaft, and the axial angle α of the paddle blade ranges from 15° to 80°. The axial angle α of the paddle blade directly affects the dispersion effect and the output torque of the motor. When α is greater than 80°, the pressure of the paddle blade on the slurry decreases, which is not conducive to the axial movement of the slurry and affects the dispersion effect; when α is less than 15°, although the pressure of the paddle blade on the slurry is increased, the disturbance to the slurry is increased, which is also conducive to the dispersion effect of the particles, but it will greatly increase the output torque of the motor, increase the manufacturing cost, and lose the economy and scientificity of the equipment.

[0010] Preferably, at least two groups of paddle blades are arranged along the axial direction on the stirring shaft, and the arrangement directions of the axial angles α of the adjacent two groups of paddle blades are opposite. When rotating at high speed, since the adjacent two groups of paddle blades are stagger-connected to the shaft and the axial angles α of the paddle blades are opposite, when the slurry is quickly thrown out along the end face and inclined plane of the group of paddle blades, it will immediately impact the water-facing surface of the adjacent group of paddle blades, thereby improving the dispersion effect of the particles and the shearing effect on the slurry.

[0011] Preferably, the ratio of the effective action width of the paddle blades of the stirring paddle to the net length of the mixing barrel is 0.2 - 0.8. When the ratio of the effective action width of the paddle blades of the stirring paddle to the net length of the mixing barrel is lower than 0.2, the disturbing force of the paddle blades on the slurry is reduced, the axial fluidity of the slurry becomes poor, which is not conducive to the dispersion of the particles; when the ratio of the effective action width of the paddle blades of the stirring paddle to the net length of the mixing barrel is greater than 0.8, the axial flow space of the slurry is reduced, resulting in limited horizontal exchange position of the slurry and increased overall slurry non-uniformity. At the same time, as the effective action width of the paddle blades increases, the shaft power output by the motor will increase significantly, making the equipment lose its economy.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. By designing the mixing barrel as a sealed structure and the mixing paddle as a high-speed rotating one, under the action of centrifugal acceleration, the high-speed rotating cement particles continuously impact the barrel wall and shear each other, so that the material is fully disturbed, evenly mixed and thoroughly dispersed in the mixing barrel, creating sufficient conditions for the full hydration of cement, and thus making the various indexes of the grouting material slurry prepared better than those of the grouting material slurry prepared by the existing pulp-making machine;

[0014] 2. By designing the mixing barrel as a horizontal structure, with the rotation of the mixing paddle, a turbulent flow area is formed on the back water surface of the paddle blades of the mixing paddle, and the slurry will flow irregularly and impact each other in the mixing barrel, enabling the rapid dispersion of cement particles and the full hydration of cement molecules;

[0015] 3. By designing the rotation speed of the mixing paddle to be greater than or equal to 400 rpm and the linear speed of the paddle blades of the mixing paddle to be greater than or equal to 7 m / s, under the action of centrifugal acceleration, the high-speed rotating cement particles continuously impact the barrel wall and shear each other, so that the material is fully disturbed, evenly mixed and thoroughly dispersed in the mixing barrel, creating sufficient conditions for the full hydration of cement, and thus making the various indexes of the grouting material slurry prepared, such as fluidity and bleeding rate, better than those of the grouting material slurry prepared by the existing pulp-making machine;

[0016] 4. When the ratio of the rotation diameter of the paddle blades of the mixing paddle to the inner diameter of the mixing barrel is lower than 0.85, the disturbance performance of the paddle blades on the slurry becomes poor. Especially in the initial stage of mixing, the mixing water will concentrate at the bottom of the mixing barrel, causing difficulties in the dispersion of the powder material and being unfavorable for rapid pulp making;

[0017] 5. The axial angle α of the paddle blades directly affects the dispersion effect and the output torque of the motor. When α is greater than 80°, the pressure of the paddle blades on the slurry decreases, which is unfavorable for the axial movement of the slurry and affects the dispersion effect; when α is less than 15°, although the pressure of the paddle blades on the slurry is increased, the disturbance of the slurry is increased, and it is also beneficial to the dispersion effect of the particles, but it will greatly increase the output torque of the motor, increase the manufacturing cost, and lose the economy and scientificity of the equipment;

[0018] 6. During high-speed rotation, since two adjacent groups of paddle blades are staggeredly connected to the shaft and the axial angles α of the paddle blades are opposite, when the slurry is quickly thrown out along the end face and inclined face of one group of paddle blades, it will immediately impact the water-facing surface of the adjacent two groups of paddle blades, thereby improving the dispersion effect of the particles and the shearing effect on the slurry;

[0019] 7. When the ratio of the effective action width of the paddle blade of the stirring paddle to the net length of the stirring barrel is less than 0.2, the disturbing force of the paddle blade on the slurry is reduced, the axial fluidity of the slurry becomes poor, which is not conducive to the dispersion of particles; when the ratio of the effective action width of the paddle blade of the stirring paddle to the net length of the stirring barrel is greater than 0.8, the axial flow space of the slurry is reduced, resulting in limited horizontal exchange position of the slurry, increasing the overall non-uniformity of the slurry. At the same time, with the increase of the effective action width of the paddle blade, the shaft power output by the motor will increase significantly, making the equipment lose its economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a pulping device.

[0021] Figure 2 It is a schematic structural diagram of the stirring barrel and the stirring paddle.

[0022] Figure 3 It is a schematic structural diagram of the stirring paddle.

[0023] Figure 4 It is Figure 3 The schematic structural diagram after rotating 90°.

[0024] Figure 5 It is Figure 1 The partial enlarged schematic structural diagram of

[0025] Figure 6 It is a schematic structural diagram of the stirring barrel before assembling with the second connecting cylinder.

[0026] Figure 7 It is a schematic structural diagram of the stirring barrel after assembling with the second connecting cylinder.

[0027] Figure 8 It is a schematic structural diagram of the union lock ring before assembling with the second connecting cylinder.

[0028] Figure 9 It is a schematic structural diagram of the union lock ring after assembling with the second connecting cylinder.

[0029] Figure 10 It is a schematic structural diagram of the weighing mechanism.

[0030] Figure 11 It is a schematic structural diagram of the hopper.

[0031] Figure 12 It is a schematic structural diagram of the water seepage test mechanism.

[0032] As shown in the figure: stirring barrel 1, stirring paddle 2, stirring shaft 2a, paddle blade 2b, drive mechanism 3, drive motor 3a, first connecting cylinder 3b, coupling 3c, second connecting cylinder 3d, bearing seat 3e, bearing 3f, sealing assembly 4, stirring paddle shaft sealing seat 4a, stirring paddle shaft skeleton oil seal 4b, first stirring paddle shaft sealing ring 4c, sealing seat convex ring 4d, second stirring paddle shaft sealing ring 4e, quick-connect assembly 5, connecting plate 5a, end cover 5b, union lock ring 5c, elastic member 5d, sliding positioning bead 5e, sliding positioning groove 5f, docking positioning hole 5g, docking positioning post 5h, stirring barrel mouth sealing ring 5i, weighing mechanism 6, weighing mounting frame 6a, weighing sensor 6b, hopper mounting frame 6c, hopper 6d, hopper movable plug 6e, insertion ear 6f, insertion post 6g, weighing mounting frame mounting flange 6h, movable plug operating rod 6i, pull ring 6j, support base 7, water tank 8, bleeding test mechanism 9, transparent bleeding test cylinder body 9a, bleeding test cylinder body cover 9b, pressure air quick connector 9c, image acquisition device 9d, bleeding test gasket 9e. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1 to 12 , in the embodiment of the present invention, a high-speed stirring barrel for preparing prestressed duct grouting material slurry includes a mutually cooperating stirring barrel 1 and a stirring paddle 2. The stirring barrel 1 is a sealed structure, and the stirring paddle 2 can be rotatably installed at a high speed inside the stirring barrel 1. By designing the stirring barrel as a sealed structure and the stirring paddle to rotate at a high speed, the high-speed rotating cement particles, under the action of centrifugal acceleration, continuously impact the barrel wall and shear each other, so that the material is fully disturbed, mixed evenly, and dispersed thoroughly inside the stirring barrel, creating sufficient conditions for the full hydration of cement, thereby making the various indexes of the prepared grouting material slurry better than those of the grouting material slurry made by the existing pulp-making machine. The stirring barrel 1 is a horizontal structure. By designing the stirring barrel as a horizontal structure, as the stirring paddle rotates, a turbulent flow area is formed on the back water surface of the paddle blade of the stirring paddle, and the slurry will flow irregularly and impact each other in the stirring barrel, so that the cement particles are quickly dispersed and the cement molecules are fully hydrated.

[0035] The rotation speed of the above-mentioned stirring paddle 2 is greater than or equal to 400 rpm. By designing the rotation speed of the stirring paddle to be greater than or equal to 400 rpm and the linear velocity of the paddle blades of the stirring paddle to be greater than or equal to 7 m / s, in this way, the high-speed rotating cement particles, under the action of centrifugal acceleration, continuously impact the barrel wall and shear each other, so that the material is fully disturbed, mixed evenly and dispersed thoroughly in the stirring barrel, creating sufficient conditions for the full hydration of cement. As a result, the slurry of the grouting material made has better various indexes (fluidity, bleeding rate, etc.) than the slurry of the grouting material made by the existing pulp-making machine. The ratio of the rotating diameter of the paddle blades of the stirring paddle 2 to the inner diameter of the stirring barrel 1 is greater than or equal to 0.7 and less than 1. When the ratio of the rotating diameter of the paddle blades of the stirring paddle to the inner diameter of the stirring barrel is lower than 0.85, the disturbance performance of the paddle blades 2b to the slurry becomes poor. Especially in the initial stage of stirring, the mixing water will concentrate at the bottom of the stirring barrel, making it difficult to disperse the powder material and being unfavorable for rapid pulp making.

[0036] The above-mentioned stirring paddle 2 includes a stirring shaft 2a. Along the axial direction of the stirring shaft 2a, there is at least one group of paddle blades 2b. Each group of paddle blades 2b includes at least one paddle blade 2b arranged along the circumferential direction of the stirring shaft 2a. The range of the axial angle α of the paddle blade 2b is 15 - 80°. The axial angle α of the paddle blade directly affects the dispersion effect and the output torque of the motor. When α is greater than 80°, the pressure of the paddle blade on the slurry decreases, which is unfavorable for the axial movement of the slurry and affects the dispersion effect. When α is less than 15°, although the pressure of the paddle blade on the slurry is increased, the disturbance to the slurry is increased, and it is also beneficial to the dispersion effect of the particles, but it will greatly increase the output torque of the motor, increase the manufacturing cost, and lose the economy and scientificity of the equipment. Along the axial direction of the stirring shaft 2a, there are at least two groups of paddle blades 2b, and the arrangement directions of the axial angles α of the adjacent two groups of paddle blades 2b are opposite. When rotating at a high speed, since the adjacent two groups of paddle blades are staggeredly connected to the shaft and the axial angles α of the paddle blades are opposite, when the slurry is quickly thrown out along the end face and inclined plane of the group of paddle blades, it will immediately impact the water-facing surface of the adjacent group of paddle blades, thereby improving the dispersion effect of the particles and the shearing effect on the slurry.

[0037] The ratio of the effective action width of the paddle blades of the above-mentioned stirring paddle 2 to the net length of the stirring barrel 1 is 0.2 - 0.8. When the ratio of the effective action width of the paddle blades of the stirring paddle to the net length of the stirring barrel is lower than 0.2, the disturbing force of the paddle blades on the slurry is reduced, the axial fluidity of the slurry becomes poor, and it is unfavorable for the dispersion of the particles. When the ratio of the effective action width of the paddle blades of the stirring paddle to the net length of the stirring barrel is greater than 0.8, the axial flow space of the slurry is reduced, resulting in limited horizontal exchange positions of the slurry and increased overall slurry non-uniformity. At the same time, as the effective action width of the paddle blades increases, the shaft power output by the motor will increase significantly, making the equipment lose its economy.

[0038] A pulping device includes a stirring barrel 1, a stirring paddle 2, a driving mechanism 3, a sealing assembly 4, a quick-connect assembly 5, a weighing mechanism 6 and a bleeding test mechanism 9 that cooperate with each other. The stirring barrel 1 is a sealed structure. The stirring paddle 2 is rotatably installed in the stirring barrel 1 at a high speed. The driving mechanism 3 is used to drive the stirring paddle 2 to rotate at a high speed. The sealing assembly 4 is used for sealing the stirring barrel 1. The quick-connect assembly 5 is used for the quick installation and disassembly of the stirring barrel 1. The weighing mechanism 6 is used for weighing materials and conveying the materials into the stirring barrel 1. The bleeding test mechanism 9 is used for measuring the bleeding rate of the prepared grout slurry. By designing the stirring barrel 1 as a sealed structure and the stirring paddle 2 to rotate at a high speed, the cement particles rotating at a high speed continuously impact the barrel wall and shear each other under the action of centrifugal acceleration, so that the materials are fully disturbed, mixed evenly and dispersed thoroughly in the stirring barrel, creating sufficient conditions for the full hydration of cement, and thus making the various indexes of the prepared grout slurry better than those of the grout slurry prepared by the existing pulping machines.

[0039] The stirring equipment in the pharmaceutical industry is mainly used in material mixing, including dry powder mixing and solid-liquid and liquid-liquid mixing. The rotation speed of the mixer (machine) is not high, generally not exceeding 300 rpm. While the homogenizer in the chemical industry has a very high rotation speed, but it is mainly used for shearing, which is essentially different from the stirring barrel 1 of the present invention.

[0040] A stirring barrel inlet is provided at the upper part of the stirring barrel 1, and a sealing cover is installed on the stirring barrel inlet. A stirring barrel water inlet and a stirring barrel outlet are also provided on the stirring barrel 1. The stirring barrel water inlet is communicated with a water source through a water inlet valve. The stirring barrel outlet is provided with an outlet valve.

[0041] The above-mentioned mixing barrel 1 is of a horizontal structure. By designing the mixing barrel 1 as a horizontal structure, as the mixing paddle 2 rotates, a turbulent zone is formed on the back surface of the paddle blade 2b of the mixing paddle 2. Then, the slurry will flow randomly and collide with each other in the mixing barrel 1, enabling the cement particles to be rapidly dispersed and the cement molecules to be fully hydrated. The rotational speed of the mixing paddle 2 is greater than or equal to 400 rpm. By designing the rotational speed of the mixing paddle 2 to be greater than or equal to 400 rpm and the linear velocity of the paddle blade 2b of the mixing paddle 2 to be greater than or equal to 7 m / s, the cement particles rotating at high speed will continuously collide with the barrel wall and shear each other under the action of centrifugal acceleration, causing the material to be fully disturbed, mixed evenly, and dispersed thoroughly in the mixing barrel 1, creating sufficient conditions for the full hydration of cement. As a result, the various indexes of the prepared grouting material slurry, such as fluidity and bleeding rate, are better than those of the grouting material slurry prepared by the existing pulp-making machine. The ratio of the rotational diameter of the paddle blade of the mixing paddle 2 to the inner diameter of the mixing barrel 1 is greater than or equal to 0.7 and less than 1. When the ratio of the rotational diameter of the paddle blade of the mixing paddle 2 to the inner diameter of the mixing barrel 1 is lower than 0.85, the disturbance performance of the paddle blade 2b to the slurry becomes poor. Especially in the initial stage of mixing, the mixing water will concentrate at the bottom of the mixing barrel, making it difficult to disperse the powder materials and being unfavorable for rapid pulp-making. The ratio of the effective action width of the paddle blade of the mixing paddle 2 to the net length of the mixing barrel 1 is 0.2 - 0.8, that is, 0.2 ≤ (b1 + b2 + b3 + b4) / b0 ≤ 0.80 in the figure. When the ratio of the effective action width of the paddle blade of the mixing paddle 2 to the net length of the mixing barrel 1 is lower than 0.2, the disturbing force of the paddle blade 2b to the slurry is reduced, and the axial fluidity of the slurry becomes poor, which is unfavorable for the dispersion of particles. When the ratio of the effective action width of the paddle blade of the mixing paddle 2 to the net length of the mixing barrel 1 is greater than 0.8, the axial flow space of the slurry is reduced, resulting in limited horizontal exchange positions of the slurry and increased overall slurry non-uniformity. At the same time, as the effective action width of the paddle blade increases, the shaft power output by the motor will increase significantly, making the equipment uneconomical.

[0042] The above-mentioned stirring paddle 2 includes a stirring shaft 2a, and at least one set of paddle blades 2b is arranged on the stirring shaft 2a along the axial direction. Each set of paddle blades 2b includes at least one paddle blade 2b arranged along the circumferential direction of the stirring shaft 2a. The axial angle α of the paddle blade 2b ranges from 15° to 80°. The axial angle α of the paddle blade 2b directly affects the dispersion effect and the output torque of the motor. When α is greater than 80°, the pressure of the paddle blade 2b on the slurry decreases, which is not conducive to the axial movement of the slurry and affects the dispersion effect. When α is less than 15°, although the pressure of the paddle blade 2b on the slurry is increased, the disturbance of the slurry is increased, which is also beneficial to the dispersion effect of the particles, but it will greatly increase the output torque of the motor, increase the manufacturing cost, and lose the economy and scientificity of the equipment. At least two sets of paddle blades 2b are arranged on the stirring shaft 2a along the axial direction, and the arrangement directions of the axial angles α of adjacent two sets of paddle blades 2b are opposite. When rotating at a high speed, since adjacent two sets of paddle blades 2b are staggeredly connected to the shaft, and the axial angles α of the paddle blades 2b are opposite, when the slurry is quickly thrown out along the end face and inclined plane of one set of paddle blades 2b, it will immediately impact the water-facing surface of the adjacent two sets of paddle blades 2b, thereby improving the dispersion effect of the particles and the shearing effect on the slurry.

[0043] The above-mentioned quick-connecting component 5 includes a connecting disk 5a arranged at the mouth of the stirring barrel 1 and an end cover 5b matched with the connecting disk 5a. Both the end cover 5b and the connecting disk 5a are annular structures. The end cover 5b is hermetically connected to the connecting disk 5a. A movable joint locking ring 5c that can be circumferentially positioned and rotated is sleeved on the outer wall of the end cover 5b. An internal thread is provided on one side of the inner wall of the movable joint locking ring 5c facing the connecting disk 5a, and an external thread matched with the internal thread is provided on the outer wall of the connecting disk 5a. Generally, it is necessary to regularly remove the stirring barrel 1 for cleaning and maintenance. The existing connection methods between the stirring barrel and the end cover include: flange connection, clamp connection, snap connection, and screw connection. Flange connection requires bolt fastening, which is time-consuming and laborious to disassemble; clamp connection requires a large chuck, and two people must operate when the chuck is butted and sleeved with a clamp; snap connection has a relatively complex structure and requires a large space; screw connection has a limited application range. However, with this quick-connecting component, the connection and disassembly between the connecting disk 5a and the end cover 5b can be easily and conveniently completed by rotating the movable joint locking ring 5c, thereby greatly reducing the labor intensity and greatly improving the efficiency.

[0044] A plurality of sliding positioning beads 5e are installed on the inner wall of the above-mentioned movable joint locking ring 5c along the circumferential direction through elastic members 5d. Sliding positioning grooves 5f are provided on the outer wall of the end cover 5b along the circumferential direction corresponding to the positions of the sliding positioning beads 5e. Of course, other structures can also be adopted. The elastic member 5d is a spring. Of course, other types of elastic members can also be adopted.

[0045] A mating docking positioning hole 5g and a docking positioning post 5h are provided between the above-mentioned end cap 5b and the connection disk 5a. The docking positioning hole 5g is provided on the end cap 5b or the connection disk 5a, and the corresponding docking positioning post 5h is provided on the connection disk 5a or the end cap 5b. The added mating docking positioning hole 5g and docking positioning post 5h facilitate the connection between the end cap 5b and the connection disk 5a, thereby further improving the efficiency. The docking positioning holes 5g are arranged at intervals along the circumferential direction of the end cap 5b or the connection disk 5a. A sealing ring 5i for the mouth of the stirring barrel is provided between the end cap 5b and the connection disk 5a.

[0046] The above-mentioned sealing assembly 4 includes a stirring paddle shaft seal seat 4a, a stirring paddle shaft skeleton oil seal 4b, and a first stirring paddle shaft sealing ring 4c. A stirring paddle shaft mounting hole that mates with the stirring shaft 2a of the stirring paddle 2 is provided in the middle of the stirring paddle shaft seal seat 4a. The stirring paddle shaft skeleton oil seal 4b and the first stirring paddle shaft sealing ring 4c are respectively installed axially in the stirring paddle shaft mounting hole. A seal seat mounting hole that mates with the outer diameter of the stirring paddle shaft seal seat 4a is provided in the middle of the end cap 5b. During installation, the stirring paddle shaft seal seat 4a is sealingly installed in the seal seat mounting hole, and the stirring paddle shaft seal seat 4a is sleeved on the stirring shaft 2a of the stirring paddle 2. The first stirring paddle shaft sealing ring 4c is arranged on the side facing the paddle blade 2b of the stirring paddle 2. In the working state, the slurry has a tendency to invade the sealing assembly 4 axially along the stirring shaft 2a. Since the slurry contains particulate matters of different sizes, when the stirring shaft 2a rotates, the slurry adheres to the shaft, which will inevitably cause friction to the sealing material. Especially the slurry remaining in the gaps of the sealing material will solidify into larger hard particulate matters and are not easily removed. Over time, the seal will be damaged and leakage will occur. If only oil seal, soft packing seal, sealing ring, etc. are used alone, the above phenomena will occur. However, this sealing assembly 4 adopts a combined structure of a sealing ring and a skeleton oil seal, which can effectively prevent the slurry from invading the seal body along the rotating stirring shaft 2a, thereby improving the service life.

[0047] On one side of the above-mentioned stirring paddle shaft seal seat 4a facing the paddle blade 2b, a seal seat convex ring 4d facilitating cleaning is provided along the circumferential direction of the stirring paddle shaft mounting hole. The added seal seat convex ring 4d can cause a turbulent effect of the cleaning water at this position, so that the slurry and particles on the sealing slurry-facing surface between the shaft and the sealing ring can be easily washed away, minimizing the residual slurry at this position to the greatest extent, and further improving the service life. A second stirring paddle shaft sealing ring 4e is provided on the inner wall of the seal seat convex ring 4d. By designing two sealing rings, gaps are left between the sealing rings and between the sealing ring and the skeleton oil seal, so that the lubricating oil can be stored in the gaps. During the stirring operation, an oil film will be formed at the interface where the stirring shaft 2a and the sealing ring move relative to each other, reducing friction and forming a seal, thus further improving the service life.

[0048] The above-mentioned second stirring paddle shaft sealing ring 4e and the first stirring paddle shaft sealing ring 4c are arranged at intervals, and the second stirring paddle shaft sealing ring 4e is arranged at the port of the seal seat convex ring 4d facing the paddle blade 2b. By arranging the second stirring paddle shaft sealing ring 4e at the port of the seal seat convex ring 4d facing the paddle blade 2b, the second stirring paddle shaft sealing ring 4e is as close as possible to the port of the seal seat convex ring 4d facing the paddle blade 2b, which can further reduce the gap between the inner wall of the seal seat convex ring 4d and the stirring shaft 2a, thus avoiding the residue of slurry and improving the service life. A fillet is provided at the outer edge of the port of the seal seat convex ring 4d facing the paddle blade 2b. By designing the outer edge of the port of the seal seat convex ring 4d facing the paddle blade 2b into a fillet, it is beneficial to the formation of the turbulent effect, so that the slurry and particles on the sealing slurry-facing surface between the shaft and the sealing ring can be washed away more conveniently.

[0049] The above-mentioned driving mechanism 3 includes a driving motor 3a for driving the rotation of the stirring paddle 2 and a measuring element for measuring the current and / or power of the driving motor 3a, and the measuring element is connected to the driving motor 3a. By adding the measuring element to measure the current and / or power of the driving motor 3a, the corresponding value of the fluidity of the slurry can be obtained through the current and / or power. The measuring element is connected to the upper computer. By connecting the measuring element to the upper computer such as a numerical control machine to achieve real-time communication, once the fluidity of the slurry reaches the standard, the upper computer can alarm to prompt the operator to operate, or directly stop and alarm. On the one hand, this can ensure the best effect of pulp making, and on the other hand, it can save time and energy.

[0050] The above-mentioned driving mechanism 3 further includes a first connecting cylinder 3b, and the output shaft end of the driving motor 3a is inserted into the first connecting cylinder 3b. The added first connecting cylinder 3b facilitates the installation of the driving motor 3a. The output shaft of the driving motor 3a is located inside the first connecting cylinder 3b, and a coupling 3c for connecting the stirring shaft 2a of the stirring paddle 2 is installed on the output shaft of the driving motor 3a. The added coupling 3c facilitates the connection between the output shaft of the driving motor 3a and the stirring shaft 2a of the stirring paddle 2; at the same time, designing the coupling 3c inside the first connecting cylinder 3b can also play a role in dust prevention. To facilitate the installation of the coupling 3c, an installation window is provided on the first connecting cylinder 3b, and a sealing cover can be installed on the installation window.

[0051] The above-mentioned driving mechanism 3 further includes a second connecting cylinder 3d. One end of the second connecting cylinder 3d is coaxially connected to the first connecting cylinder 3b, and the other end of the second connecting cylinder 3d is connected to the end cover 5b. The second connecting cylinder 3d and the driving motor 3a are respectively arranged at both ends of the first connecting cylinder 3b. The second connecting cylinder 3d and the end cover 5b are integrally formed by welding and form a step for installing and clamping the stirring paddle shaft seal seat 4a, and a sealing ring is installed in the step. A bearing seat 3e is provided on the inner wall of the second connecting cylinder 3d, and a bearing 3f that cooperates with the stirring shaft 2a of the stirring paddle 2 is installed in the bearing seat 3e. By adding the second connecting cylinder 3d and adding the bearing 3f for installing the stirring paddle 2 inside the second connecting cylinder 3d, the installation of the stirring paddle 2 is facilitated. At the same time, the stirring paddle shaft seal seat 4a is fixedly installed on the corresponding bearing seat 3e by bolts. The number of the bearing seats 3e is two, and the two bearing seats 3e are respectively arranged on the inner walls at both ends of the second connecting cylinder 3d, and the number of the bearings 3f is also two correspondingly. By adopting double-bearing fixation, the stability of the high-speed rotation of the stirring paddle 2 is ensured, and it is also convenient to remove the stirring bucket 1 for cleaning.

[0052] The above-mentioned weighing mechanism 6 includes a weighing mounting frame 6a, a weighing sensor 6b, a hopper mounting frame 6c and a hopper 6d. The hopper 6d is installed on the hopper mounting frame 6c, the hopper mounting frame 6c is installed on the weighing sensor 6b, the weighing sensor 6b is installed at the upper end of the weighing mounting frame 6a, and a hopper movable plug 6e for blocking the discharge port is provided at a position corresponding to the discharge port of the hopper 6d inside the hopper 6d. This weighing mechanism 6 can quickly and accurately measure the weight of the material in the discharge hopper 6d through the weighing sensor 6b, thereby improving the quality of pulp making.

[0053] On the outer walls on both sides of the above-mentioned hopper 6d, there is respectively provided an insertion ear 6f. At positions corresponding to the two insertion ears 6f on the hopper mounting rack 6c, there is respectively provided an insertion post 6g, and the insertion post 6g is matched with the insertion ear 6f. By adding the insertion post 6g and the insertion ear 6f, on the one hand, it can realize removing the hopper 6d for loading, which facilitates the operation. On the other hand, when the weighing sensor is damaged, weighing can also be realized by directly weighing the hopper 6d. At the lower end of the weighing mounting rack 6a, there is provided a weighing mounting rack mounting flange 6h in a semi-circular ring structure. The added weighing mounting rack mounting flange 6h facilitates the installation and disassembly of the weighing mounting rack 6a. The lower end of the weighing mounting rack 6a is mounted on the flange of the connecting cylinder through the weighing mounting rack mounting flange 6h.

[0054] The above-mentioned hopper movable plug 6e is in a frustum structure. The small-head end of the frustum structure is arranged downward, and the diameter of the small-head end of the frustum structure is smaller than the diameter of the discharge port, and the diameter of the large-head end of the frustum structure is larger than the diameter of the discharge port. By designing the hopper movable plug 6e as a frustum structure, arranging the small-head end of the frustum structure downward, and the diameter of the small-head end of the frustum structure being smaller than the diameter of the discharge port, and the diameter of the large-head end of the frustum structure being larger than the diameter of the discharge port, this facilitates the blocking and opening of the hopper movable plug 6e. One side of the hopper movable plug 6e is movably connected with a movable plug operating rod 6i. By movably connecting the movable plug operating rod 6i to one side of the hopper movable plug 6e, when the hopper movable plug 6e is lifted upward by the movable plug operating rod 6i, the hopper movable plug 6e will gradually change from a horizontal state to a vertical state under its own weight and the pressure of the material, thereby opening the discharge port; and when it is necessary to block the discharge port, during the process of putting the hopper movable plug 6e back to the discharge port by the movable plug operating rod 6i, the hopper movable plug 6e will gradually change from a vertical state to a horizontal state again; the above operation process is simple, convenient and efficient. At the upper end of the movable plug operating rod 6i, there is provided a pull ring 6j for convenient operation. The added pull ring 6j facilitates manual or mechanical operation.

[0055] A bleeding test mechanism 9 is provided at a position on the bracket base 7 corresponding to the mixing barrel 1. The bleeding test mechanism 9 includes a transparent bleeding test cylinder body 9a and a bleeding test cylinder cover 9b that cooperate with each other. Both the transparent bleeding test cylinder body 9a and the bleeding test cylinder cover 9b can be made of plexiglass. The transparent bleeding test cylinder body 9a is installed on the bracket base 7. During the test, the levelness of the transparent bleeding test cylinder body 9a needs to be ensured. A scale is provided on the outer wall of the transparent bleeding test cylinder body 9a, and a pressure air quick connector 9c is provided on the bleeding test cylinder cover 9b. By pouring the prepared grout slurry into the transparent bleeding test cylinder body 9a, covering the bleeding test cylinder cover 9b, and then introducing pressure air through the pressure air quick connector 9c, the bleeding test of the grout slurry can be completed on-site, with simple, convenient, and fast operation. An image acquisition device 9d is provided on the bracket base 7 at a position corresponding to the scale on the outer wall of the transparent bleeding test cylinder body 9a. The image acquisition device 9d is arranged facing the scale, and the image acquisition device 9d is connected to a host computer. The initial liquid level height a1 of the grout slurry is collected by the image acquisition device 9d. After standing for 10 minutes, the compressed air valve is opened, and the pressure is quickly increased to the test pressure through the pressure air quick connector 9c. After pressurizing for 5 minutes, the bleeding water surface height a2 and the cement slurry surface height a3 after pressurization are collected by the image acquisition device 9d again. In this way, the pressure bleeding rate can be accurately calculated. Since the whole process does not require human eye recognition, the error is greatly reduced, and the accuracy of the test is improved. A bleeding test gasket 9e is provided between the transparent bleeding test cylinder body 9a and the bleeding test cylinder cover 9b. The added bleeding test gasket 9e improves the sealing performance of the bleeding test, thereby further improving the accuracy of the test. The pressure air quick connector 9c is connected to a compressed air gas source, and the compressed air gas source provides a maximum pressure not lower than 0.8 MPa and is equipped with a pressure gauge with a maximum reading not lower than 1.0 MPa and a minimum scale value of 0.02 MPa.

[0056] At the start of the bleeding test, inject about 200 ml of the prepared slurry into the transparent bleeding test cylinder body 9a, then tightly cover the bleeding test cylinder cover 9b, and connect the pressure air quick connector 9c. Start video recording and record the initial height as a1. After standing for 10 minutes, open the compressed air valve and quickly increase the pressure to the test pressure. After pressurizing for 5 minutes, video record the bleeding water surface height a2 and the cement slurry surface height a3 after pressurization.

[0057] Calculate the pressure bleeding rate (M yl ):

[0058] M yl ——— Pressure bleeding rate

[0059] a1 — The initial cement slurry height, in millimeters (mm);

[0060] a2—the height of the water seepage surface, in millimeters (mm);

[0061] a3—the height after pressurization, in millimeters (mm);

[0062] The above results are all automatically completed by the host computer connected to the image acquisition device 9d, and the results can be automatically displayed and have an upload function. During the same period, the pressure water seepage rate should be taken as the arithmetic mean of two parallel test data (accurate to 0.1%) as the test result of this period.

[0063] During installation, first install the first connecting cylinder 3b and the second connecting cylinder 3d together; then, install the bearing, the stirring paddle shaft seal seat 4a, the stirring paddle shaft sealing ring, and the stirring paddle shaft skeleton oil seal 4b; next, insert the stirring paddle 2; then, install the assembled part on the support base 7 through the support, and a water tank 8 is also installed on the support base 7; then, align the docking positioning hole 5g and / or the docking positioning post 5h on the stirring barrel 1 with the docking positioning post 5h and / or the docking positioning hole 5g on the end cover 5b, and close them, then buckle the threaded rotary joint locking ring 5c to complete the installation of the stirring barrel 1; at the same time, complete the installation of the driving motor 3a; finally, install the weighing mechanism on the flange of the connecting cylinder through the flange 6h of the weighing installation frame. After installation, the discharge port of the hopper 6d is aligned with the stirring barrel inlet on the stirring barrel 1, and the hopper 6d is suspended.

[0064] During operation, first, remove the hopper 6d and add appropriate materials into it (a little less than the required materials), then install the hopper 6d filled with materials on the hopper installation frame 6c for weighing, and continue to add materials until the materials reach the required amount, or directly add materials into the hopper 6d without removing the hopper 6d until the materials reach the required amount; then, operate the piston operating rod 6i to pour the materials into the stirring barrel 1, and add the corresponding amount of water into the stirring barrel 1 through the water inlet valve; next, cover and seal the stirring barrel inlet on the stirring barrel 1; then start the driving motor 3a to make the stirring paddle 2 reach the preset speed. When the measuring element detects that the fluidity of the slurry reaches the standard, control the driving motor 3a to stop; finally, open the discharge valve on the stirring barrel 1 to discharge the slurry.

[0065] The principle of the above-mentioned measuring element detecting the fluidity of the slurry is based on the relationship between the power of the driving motor 3a and the fluidity of the slurry, which is specifically as follows:

[0066] Through repeated practice in the pulping process, it is found that: 1. After the feeding is completed, as the rotation speed of the stirring paddle 2 increases, the power of the driving motor 3a gradually and significantly increases, reaches the maximum value after reaching the set maximum rotation speed, and then slowly decreases. After the slurry is evenly stirred, the power will drop to a certain value and basically stabilize. 2. Under the condition of the same stirring amount (the total mass of the grouting material and the mixing water is the same), due to different grouting material manufacturers or different water-binder ratios, the fluidity is different under the same stirring conditions. At this time, the fluidity has a good linear relationship with the power measured by the driving motor 3a at a certain specific rotation speed. According to the linear relationship diagram, the calculation formula between the two can be obtained as y = ax + b (where y is the power, a is a fixed constant for a certain stirring amount, x is the fluidity, and b is a fixed constant for a certain stirring amount). Therefore, when the stirring amount is fixed, the instantaneous fluidity value can be obtained by measuring the driving power at a specific rotation speed through the above calculation formula.

[0067] In addition, this equipment can also realize the on-site preparation and on-site use of the grouting material. The quality of each component material can be controlled throughout the process, completely eliminating the phenomenon of fraud and ensuring that each preparation of the grouting material fully meets the standards. Specifically, first pour cement and grouting agents (dry powders such as calcite powder, mineral powder, silica fume, fly ash, water reducer, expansion agent, defoaming agent, etc.) into the stirring barrel 1, where the cement accounts for about 90% and the grouting agent accounts for about 10%. Then cover the sealing cover and start the driving motor 3a until the dry powder is evenly stirred.

[0068] A pulping method for prestressed duct grouting material, comprising the following steps:

[0069] S1: Pour the grouting material into the stirring barrel 1 of the pulping equipment;

[0070] S2: Add the corresponding amount of water into the stirring barrel 1;

[0071] S3: Seal the stirring barrel 1;

[0072] S4: Start the driving motor 3a of the pulping equipment to make the stirring paddle 2 in the stirring barrel 1 reach the preset rotation speed;

[0073] S5: When the power of the driving motor 3a is stable, stop the driving motor 3a.

[0074] In this embodiment, the mixing barrel 1 is designed as a sealed structure, and the mixing paddle 2 is designed to rotate at a high speed. In this way, under the action of the centrifugal acceleration, the cement particles rotating at a high speed continuously impact the barrel wall and shear each other, causing the material to be fully disturbed, evenly mixed, and thoroughly dispersed in the mixing barrel, creating sufficient conditions for the full hydration of the cement. As a result, all the indicators of the grouting material slurry produced are better than those of the grouting material slurry produced by the existing pulp-making machines. By designing the mixing barrel 1 as a horizontal structure, as the mixing paddle 2 rotates, a turbulent zone is formed on the back water surface of the paddle blade 2b of the mixing paddle 2. The slurry will flow randomly and collide with each other in the mixing barrel 1, enabling the rapid dispersion of the cement particles and the full hydration of the cement molecules. By designing the rotation speed of the mixing paddle 2 to be greater than or equal to 400 rpm and the linear velocity of the paddle blade 2b of the mixing paddle 2 to be greater than or equal to 7 m / s, under the action of the centrifugal acceleration, the cement particles rotating at a high speed continuously impact the barrel wall and shear each other, causing the material to be fully disturbed, evenly mixed, and thoroughly dispersed in the mixing barrel 1, creating sufficient conditions for the full hydration of the cement. As a result, all the indicators of the grouting material slurry produced, such as fluidity and bleeding rate, are better than those of the grouting material slurry produced by the existing pulp-making machines.

[0075] At the same time, when the ratio of the rotation diameter of the paddle blade of the mixing paddle 2 to the inner diameter of the mixing barrel 1 is lower than 0.85, the disturbance performance of the paddle blade 2b on the slurry becomes poor. Especially in the initial stage of mixing, the mixing water will concentrate at the bottom of the mixing barrel, making it difficult to disperse the powder materials, which is not conducive to rapid pulp making. The axial angle α of the paddle blade 2b directly affects the dispersion effect and the output torque of the motor. When α is greater than 80°, the pressure of the paddle blade 2b on the slurry decreases, which is not conducive to the axial movement of the slurry and affects the dispersion effect. When α is less than 15°, although the pressure of the paddle blade 2b on the slurry is increased, the disturbance of the slurry is increased, and it is also beneficial to the dispersion effect of the particles, but it will greatly increase the output torque of the motor, increase the manufacturing cost, and lose the economy and scientificity of the equipment. When rotating at a high speed, since the adjacent two groups of paddle blades 2b are stagger-connected to the shaft and the axial angle α of the paddle blade 2b is opposite, when the slurry is quickly thrown out along the end face and inclined plane of one group of paddle blades 2b, it will immediately impact the water-facing surface of the adjacent two groups of paddle blades 2b, thus improving the dispersion effect of the particles and the shearing effect on the slurry. When the ratio of the effective action width of the paddle blade of the mixing paddle 2 to the net length of the mixing barrel 1 is lower than 0.2, the disturbing force of the paddle blade 2b on the slurry is reduced, the axial fluidity of the slurry becomes poor, and it is not conducive to the dispersion of the particles. When the ratio of the effective action width of the paddle blade of the mixing paddle 2 to the net length of the mixing barrel 1 is greater than 0.8, the axial flow space of the slurry is reduced, resulting in limited horizontal exchange positions of the slurry, increased overall slurry non-uniformity. At the same time, as the effective action width of the paddle blade increases, the shaft power output by the motor will increase significantly, making the equipment lose its economy.

[0076] Moreover, it is generally necessary to regularly remove the mixing barrel 1 for cleaning and maintenance. The existing connection methods between the mixing barrel and the end cover include: flange connection, clamp connection, snap connection, and threaded connection. Flange connection requires bolt tightening, which is time-consuming and laborious for disassembly; clamp connection requires a large chuck, and two people must operate when the chuck is butted and the clamp is sleeved; snap connection has a relatively complex structure and requires a large space; the application range of threaded connection is limited. However, with this quick-connection component, the connection and disassembly between the connection plate 5a and the end cover 5b can be easily and conveniently completed by rotating the quick-connect locking ring 5c, thus greatly reducing the labor intensity and significantly improving the efficiency; the added docking positioning holes 5g and docking positioning posts 5h that cooperate with each other facilitate the connection between the end cover 5b and the connection plate 5a, thereby further improving the efficiency; in the working state, the slurry has a tendency to invade the sealing component 4 axially along the stirring shaft 2a. Since the slurry contains particles of different sizes, when the stirring shaft 2a rotates, the slurry adheres to the shaft, which will inevitably cause friction to the sealing material. Especially the slurry remaining in the gaps of the sealing material will solidify into larger hard particles and is not easy to be removed. Over time, it will damage the seal and cause leakage. If only using oil seal, soft packing seal, sealing ring, etc. alone, the above phenomena will occur. However, this sealing component 4 adopts a combined structure of a sealing ring and a skeleton oil seal, which can effectively prevent the slurry from invading the seal body along the rotating stirring shaft 2a, thereby increasing the service life.

[0077] Furthermore, the added sealing seat convex ring 4d can cause the cleaning water to form a turbulent effect at this place, so that the slurry and particles on the slurry-facing surface of the shaft and the sealing ring can be conveniently washed away, minimizing the residual slurry at this place to the greatest extent, thereby further increasing the service life; by designing two sealing rings, there are gaps between the sealing rings and between the sealing ring and the skeleton oil seal, so that the lubricating oil can be preserved in the gaps. During the stirring operation, an oil film will be formed at the interface where the stirring shaft 2a and the sealing ring move relative to each other, which not only reduces the friction but also forms a seal, thereby further increasing the service life; by arranging the second stirring paddle shaft sealing ring 4e at the port of the sealing seat convex ring 4d facing the paddle blade 2b, the second stirring paddle shaft sealing ring 4e is as close as possible to the port of the sealing seat convex ring 4d facing the paddle blade 2b, which can further reduce the gap between the inner wall of the sealing seat convex ring 4d and the stirring shaft 2a, thus avoiding the residue of the slurry and increasing the service life; by designing the outer edge of the port of the sealing seat convex ring 4d facing the paddle blade 2b into a rounded corner, it is beneficial to the formation of the turbulent effect, so that the slurry and particles on the slurry-facing surface of the shaft and the sealing ring can be more conveniently washed away.

[0078] In addition, in this embodiment, a measuring element is added to measure the current and / or power of the driving motor 3a, so that the corresponding value of the fluidity of the slurry can be obtained through the current and / or power; by connecting the measuring element to a host computer such as a numerical control machine to achieve real-time communication, once the fluidity of the slurry reaches the standard, the host computer can alarm to prompt the operator to operate, or directly stop the machine and alarm. Thus, on the one hand, the best effect of pulp making can be ensured, and on the other hand, time and energy can be saved; the added first connecting cylinder 3b facilitates the installation of the driving motor 3a; the added coupling 3c facilitates the connection between the output shaft of the driving motor 3a and the stirring shaft 2a of the stirring paddle 2; designing the coupling 3c inside the first connecting cylinder 3b can also play a role in dust prevention; the second connecting cylinder 3d is connected to the end cover 5b by welding, and forms a step for installing and clamping the stirring paddle shaft seal seat 4a, and a sealing ring is installed in the step; the second connecting cylinder 3d is connected to the end cover 5b by welding, and forms a step for installing and clamping the stirring paddle shaft seal seat 4a, and a sealing ring is installed in the step; by adopting double bearings for fixation, both the stability of the high-speed rotation of the stirring paddle 2 is ensured, and the stirring barrel 1 is convenient to be removed and cleaned.

[0079] Furthermore, the weighing mechanism 6 can quickly and accurately measure the weight of the material in the discharge hopper 6d through the weighing sensor 6b, so as to improve the quality of pulp making; through the added insertion post 6g and insertion ear 6f, on the one hand, it is possible to remove the hopper 6d for loading, which facilitates the operation, and on the other hand, when the weighing sensor is damaged, the weighing can also be achieved by directly weighing the hopper 6d; the added weighing mounting frame mounting flange 6h facilitates the installation and disassembly of the weighing mounting frame 6a; by designing the hopper movable plug 6e as a frustum structure, and arranging the small head end of the frustum structure downward, and the diameter of the small head end of the frustum structure is smaller than the diameter of the discharge port, and the diameter of the large head end of the frustum structure is larger than the diameter of the discharge port, this facilitates the blocking and opening of the hopper movable plug 6e; by movably connecting a movable plug operating rod 6i to one side of the hopper movable plug 6e, when the hopper movable plug 6e is lifted upward by the movable plug operating rod 6i, the hopper movable plug 6e will gradually change from a horizontal state to a vertical state under its own weight and the pressure of the material, thus opening the discharge port; and when it is necessary to block the discharge port, during the process of putting the hopper movable plug 6e back to the discharge port by the movable plug operating rod 6i, the hopper movable plug 6e will gradually change from a vertical state to a horizontal state again; the above operation process is simple, convenient and efficient; the added pull ring 6j facilitates manual or mechanical operation.

[0080] In addition, in this embodiment, the prepared grout slurry is poured into the transparent bleeding test cylinder body, and the bleeding test cylinder body cover is covered. Then, compressed air is introduced through the compressed air quick connector, so that the bleeding test of the grout slurry can be completed on site, with simple, convenient, and fast operation. The initial liquid level height a1 of the grout slurry is collected by the image acquisition device. After standing for 10 minutes, the compressed air valve is opened, and the pressure is quickly increased to the test pressure through the compressed air quick connector. After pressurizing for 5 minutes, the bleeding water surface height a2 and the cement slurry surface height a3 after pressurization are collected by the image acquisition device. In this way, the pressure bleeding rate can be accurately calculated. Since the whole process does not require human eye recognition, the error is greatly reduced, and the test accuracy is improved. The added bleeding test gasket improves the sealing performance of the bleeding test, thereby further improving the test accuracy.

[0081] Finally, this equipment can also realize the on-site preparation of grout. The quality of each component material can be controlled throughout the process, completely eliminating the phenomenon of fraud and ensuring that each preparation of grout fully meets the standards. Compared with the existing method of preparing and packaging grout for transportation, it avoids the grout from getting wet and deteriorating during transportation, and also avoids the grout from deteriorating due to environmental and storage time reasons during storage. It also avoids environmental pollution and labor losses caused by secondary packaging and multiple handling. The horizontal sealed stirring barrel structure enables a small amount of cleaning water to agitate at high speed without dead corners in the barrel, ensuring that every part of the barrel can be cleaned thoroughly, greatly reducing the cleaning water volume and time, and at the same time, effectively avoiding the adverse effects caused by the incomplete cleaning of the upper part of the vertical stirring barrel, which may lead to the continuous adhesion, accumulation, and solidification of the grout slurry on the inner wall of the barrel.

Claims

1. A high-speed stirring barrel for preparing prestressed channel grouting material, comprising a stirring barrel (1) and a stirring paddle (2) that cooperate with each other, characterized in that: The stirring barrel (1) is a sealed structure, and the stirring paddle (2) is rotatably installed in the stirring barrel (1) at high speed; The mixing drum (1) further comprises a quick-connect assembly (5), wherein the quick-connect assembly (5) is used for quick installation and removal of the mixing drum (1), wherein the quick-connect assembly (5) comprises a connecting plate (5a) arranged at the mouth of the mixing drum (1) and an end cover (5b) matched with the connecting plate (5a), wherein the end cover (5b) is sealedly connected with the connecting plate (5a), wherein the outer wall of the end cover (5b) is provided with a movable locking ring (5c) which can be positioned and rotated in a circumferential direction, wherein the inner wall of the movable locking ring (5c) is provided with an internal thread on a side facing the connecting plate (5a), and the outer wall of the connecting plate (5a) is provided with an external thread matched with the internal thread. The inner wall of the movable locking ring (5c) is provided with a plurality of sliding positioning beads (5e) along the circumferential direction through an elastic member (5d), and the outer wall of the end cover (5b) is provided with a sliding positioning groove (5f) along the circumferential direction at a position corresponding to the sliding positioning beads (5e); a docking positioning hole (5g) and a docking positioning column (5h) that cooperate with each other are provided between the end cover (5b) and the connecting disk (5a), the docking positioning hole (5g) is provided on the end cover (5b) or the connecting disk (5a), and the corresponding docking positioning column (5h) is provided on the connecting disk (5a) or the end cover (5b).

2. The high-speed stirring barrel for preparing prestressed duct grouting material according to claim 1, characterized in that: The stirring barrel (1) is of a horizontal structure.

3. The high-speed stirring barrel for preparing prestressed duct grouting material according to claim 1 is characterized in that: The rotation speed of the stirring paddle (2) is greater than or equal to 400 rpm.

4. The high-speed stirring barrel for preparing prestressed duct grouting material according to claim 1, characterized in that: The ratio of the rotation diameter of the blade of the stirring paddle (2) to the inner diameter of the stirring barrel (1) is greater than or equal to 0.7 and less than 1.

5. The high-speed stirring barrel for preparing prestressed duct grouting material according to claim 1, characterized in that: The stirring paddle (2) comprises a stirring shaft (2a), and at least one group of blades (2b) is provided on the stirring shaft (2a) along the axial direction, each group of blades (2b) comprises at least one blade (2b) arranged along the circumferential direction of the stirring shaft (2a), and an axial angle α of the blades (2b) is in the range of 15-80°.

6. The high-speed stirring barrel for preparing prestressed duct grouting material according to claim 5, characterized in that: At least two groups of blades (2b) are provided on the stirring shaft (2a) along the axial direction, and the axial angles α of two adjacent groups of blades (2b) are arranged in opposite directions.

7. The high-speed stirring barrel for preparing prestressed duct grouting material according to claim 1, characterized in that: The ratio of the effective action width of the blade of the stirring paddle (2) to the net length of the stirring barrel (1) is 0.2-0.

8.

8. The high-speed stirring barrel for preparing prestressed duct grouting material according to claim 1, characterized in that: The elastic member (5d) is a spring; and a stirring barrel mouth sealing ring (5i) is provided between the end cover (5b) and the connecting plate (5a).

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