A grouting device for prestressed channel grouting material

Abstract

A slurry making device for prestressed channel grouting material comprises a mixing barrel with a sealed structure, a mixing paddle, a driving mechanism, a sealing assembly, a quick-connect assembly, a weighing mechanism and a water seepage test mechanism, wherein the mixing paddle can be rotated at high speed and installed in the mixing barrel, the driving mechanism is used to drive the mixing paddle to rotate, the sealing assembly is used to seal the mixing barrel, the quick-connect assembly is used to quickly install and disassemble the mixing barrel, the weighing mechanism is used to weigh the material and convey the material into the mixing barrel, and the water seepage test mechanism is used to measure the water seepage rate of the prepared grouting slurry. By designing the mixing barrel as a sealed structure and the mixing paddle to rotate at high speed, the cement particles rotating at high speed continuously hit the barrel wall and shear each other under the action of centrifugal acceleration, so that the material is fully disturbed in the mixing barrel, mixed evenly, and dispersed thoroughly, creating sufficient conditions for the cement to be fully hydrated, so that all indicators of the prepared grouting slurry are better than those of the grouting slurry prepared by the existing slurry making machine.

Description

Technical Field

[0001] The invention relates to the technical field of cement grouting materials, in particular to slurry making equipment for prestressed channel grouting materials. Background Art

[0002] At present, most of the existing cement-based prestressed duct grouting material pulping machines (hereinafter referred to as pulping machines) adopt a vertical stirring structure, and the stirring barrel is generally an open structure. However, since the particles (microparticles) in the cement slurry are mostly suspended in the system in the form of floccules, the higher the concentration, the stronger the tendency of floccules to exist, and the more difficult it is to disperse the cement particles. In this way, due to structural reasons, the vertical mixing tank will cause the slurry in the tank to form a regular rotating flow field with the movement of the blades, and the relative movement around the main axis is greatly reduced, causing some powders in the slurry to be lumped (water-coated powder), which is extremely difficult to break and disperse, making it difficult for some cement to be hydrated, which seriously affects the quality of pulping. Summary of the invention

[0003] The purpose of the present invention is to provide a slurry making device for prestressed duct grouting material to solve the problems raised in the above background technology.

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

[0005] A slurry making device for prestressed channel grouting material comprises a mixing barrel and a stirring paddle which cooperate with each other, a driving mechanism, a sealing assembly, a quick-connect assembly, a weighing mechanism and a water seepage test mechanism, wherein the mixing barrel is a sealing structure, the stirring paddle can be installed in the mixing barrel by high-speed rotation, the driving mechanism is used to drive the stirring paddle to rotate at high speed, the sealing assembly is used to seal the mixing barrel, the quick-connect assembly is used to quickly install and disassemble the mixing barrel, the weighing mechanism is used to weigh the material and convey the material into the mixing barrel, and the water seepage test mechanism is used to measure the water seepage rate of the grouting slurry. By designing the mixing barrel as a sealing structure and the stirring paddle to rotate at high speed, the cement particles rotating at high speed continuously hit the barrel wall and shear each other under the action of centrifugal acceleration, so that the material is fully disturbed in the mixing barrel, mixed evenly, and dispersed thoroughly, creating sufficient conditions for the cement to be fully hydrated, so that all indicators of the grouting slurry prepared are better than those prepared by the existing slurry making machine.

[0006] Compared with the prior art, the present invention has the following beneficial effects:

[0007] 1. By designing the mixing barrel as a sealed structure and the mixing paddle to rotate at high speed, the high-speed rotating cement particles constantly hit 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 mixing barrel, creating sufficient conditions for the full hydration of cement, so that the various indicators of the grouting slurry produced are better than those produced by the existing grouting slurry making machine;

[0008] 2. By designing the mixing barrel as a horizontal structure, as the stirring paddle rotates, a turbulent area is formed on the back of the paddle blade, and the slurry in the mixing barrel will flow irregularly and collide with each other, so that the cement particles are quickly dispersed and the cement molecules are fully hydrated;

[0009] 3. By designing the speed of the stirring paddle to be greater than or equal to 400rpm and the linear speed of the stirring paddle to be greater than or equal to 7m / s, the high-speed rotating cement particles, under the action of centrifugal acceleration, continuously hit the barrel wall and shear each other, so that the materials are fully disturbed, mixed evenly, and dispersed thoroughly in the mixing barrel, creating sufficient conditions for the full hydration of the cement, so that the fluidity and water bleeding rate of the grouting slurry produced are better than those produced by the existing grouting slurry making machine;

[0010] 4. When the ratio of the rotating diameter of the impeller blade to the inner diameter of the mixing barrel is less than 0.85, the disturbance performance of the impeller blade on the slurry becomes poor, especially in the initial stage of stirring, the mixing water will be concentrated at the bottom of the mixing barrel, making it difficult to disperse the powder, which is not conducive to rapid slurrying;

[0011] 5. The axial angle α of the blade directly affects the dispersion effect and the output torque of the motor. When α is greater than 80°, the pressure of the blade on the slurry is reduced, 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 blade on the slurry is increased, the disturbance of the slurry is increased, which is also conducive to the dispersion effect of the particles, it will greatly increase the output torque of the motor, increase the manufacturing cost, and lose the economy and scientificity of the equipment;

[0012] 6. When rotating at high speed, since the two adjacent groups of blades are staggered and connected to the shaft, and the axial angles α of the blades are opposite, when the slurry is thrown out quickly along the end face and inclined surface of one group of blades, it will immediately collide with the water-facing surfaces of the two adjacent groups of blades, thereby improving the dispersion effect of the particles and the shearing effect on the slurry;

[0013] 7. When the ratio of the effective width of the impeller blade to the net length of the mixing barrel is less than 0.2, the disturbance force of the impeller on the slurry is reduced, the axial fluidity of the slurry becomes worse, and it is not conducive to the dispersion of particles; when the ratio of the effective width of the impeller blade to the net length of the mixing barrel is greater than 0.8, the axial flow space of the slurry is reduced, resulting in the limitation of the horizontal exchange position of the slurry and the increase of the overall slurry non-uniformity. At the same time, with the increase of the effective width of the impeller blade, the shaft power output by the motor will increase significantly, making the equipment lose its economic efficiency;

[0014] 8. Generally, the mixing barrel needs to be removed regularly for cleaning and maintenance. The existing connection methods between the mixing barrel and the end cover include flange connection, clamp connection, buckle connection and threaded connection. The flange connection needs to be tightened with bolts, and the disassembly is time-consuming and laborious; the clamp connection requires a larger chuck, and two people must operate when the chuck is docked and the clamp is put on; the buckle connection structure is relatively complex and requires a large space; the threaded connection method has a limited application range, while the quick-connect assembly can easily and conveniently complete the connection and disassembly between the connection plate and the end cover by rotating the live joint locking ring, thereby greatly reducing the labor intensity and greatly improving the efficiency;

[0015] 9. The added docking positioning holes and docking positioning columns that cooperate with each other facilitate the connection between the end cover and the connecting plate, thereby further improving the efficiency;

[0016] 10. In the working state, the slurry tends to invade the sealing component along the axial direction of the stirring shaft. Since the slurry contains particles of different sizes, when the stirring shaft rotates, the slurry adheres to the shaft, which will inevitably cause friction to the sealing material, especially the slurry remaining in the gap of the sealing material, which becomes larger hard particles after solidification and is not easy to be removed. Over time, it will damage the seal and cause leakage. If oil seals, soft packing seals, sealing rings, etc. are used alone, the above phenomenon will occur. However, this sealing component adopts a combined structure of sealing rings and skeleton oil seals, which can effectively prevent the slurry from invading the sealing body along the rotating stirring shaft, thereby increasing the service life;

[0017] 11. The added seal seat convex ring can make the cleaning water form a turbulent effect at this place, so as to easily wash away the slurry and particles on the sealing surface of the shaft and the seal ring, and minimize the residual slurry at this place, so as to further improve the service life;

[0018] 12. By designing two sealing rings, there are gaps between the sealing rings and between the sealing rings and the skeleton oil seal, so that the lubricating oil can be preserved in the gaps. During the stirring operation, an oil film will form on the interface of the relative movement between the stirring shaft and the sealing ring, which not only reduces friction but also forms a seal, thereby further prolonging the service life;

[0019] 13. By arranging the second stirring paddle shaft sealing ring at the end of the sealing seat convex ring facing the paddle blade, the second stirring paddle shaft sealing ring is as close as possible to the end of the sealing seat convex ring facing the paddle blade, so that the gap between the inner wall of the sealing seat convex ring and the stirring shaft can be further reduced, thereby avoiding slurry residue and improving the service life;

[0020] 14. By designing the outer edge of the port of the sealing seat convex ring facing the blade to be rounded, it is conducive to the formation of turbulence effect, so that the slurry and particles on the sealing slurry surface of the shaft and the sealing ring can be washed away more conveniently;

[0021] 15. The current and / or power of the driving motor is measured by an additional measuring element, so that the corresponding value of the fluidity of the slurry can be obtained through the current and / or power;

[0022] 16. Real-time communication is achieved by connecting the measuring element to a host computer such as a CNC machine. 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 to alarm, thereby ensuring the best pulping effect on the one hand, and saving time and energy on the other hand;

[0023] 17. The additional first connecting tube facilitates the installation of the drive motor;

[0024] 18. The additional coupling facilitates the connection between the output shaft of the drive motor and the stirring shaft of the stirring paddle;

[0025] 19. The coupling is designed in the first connecting tube, which can also play a role in dust prevention;

[0026] 20. The second connecting tube is connected to the end cover by welding, and forms a step for mounting and clamping the sealing seat of the stirring paddle shaft, and a sealing ring is installed in the step;

[0027] 21. The second connecting tube is connected to the end cover by welding, and forms a step for mounting and clamping the sealing seat of the stirring paddle shaft, and a sealing ring is installed in the step;

[0028] 22. The double bearing fixation ensures the stability of the high-speed rotation of the stirring paddle and facilitates the removal and cleaning of the stirring barrel.

[0029] 23. The weighing mechanism can quickly and accurately measure the weight of the material in the hopper through the weighing sensor, thereby improving the quality of pulping;

[0030] 24. The additional plug-in column and plug-in ear can realize the removal of the hopper for loading, which is convenient for operation. On the other hand, when the weighing sensor is broken, weighing can also be achieved by directly weighing the hopper.

[0031] 25. The additional weighing mounting frame mounting flange facilitates the installation and disassembly of the weighing mounting frame;

[0032] 26. By designing the movable plug of the hopper into a frustum structure, and arranging the small end of the frustum structure downward, and the diameter of the small end of the frustum structure is smaller than the diameter of the discharge port, and the diameter of the large end of the frustum structure is larger than the diameter of the discharge port, it is convenient to block and open the movable plug of the hopper;

[0033] 27. By movably connecting the movable plug operating rod on one side of the hopper movable plug, when the hopper movable plug is lifted upward by the movable plug operating rod, the hopper movable plug will gradually change from a horizontal state to a vertical state under the pressure of its own weight and the material, thereby opening the discharge port; and when the discharge port needs to be blocked, the hopper movable plug will gradually change from a vertical state to a horizontal state during the process of putting the hopper movable plug back to the discharge port by the movable plug operating rod; the above operation process is simple, convenient and efficient;

[0034] 28. The added pull ring facilitates manual or mechanical operation;

[0035] 29. This equipment can also realize on-site preparation of grouting materials. The quality of each component material can be controlled throughout the process, completely eliminating the phenomenon of fraud and ensuring that each preparation of grouting materials fully meets the standards;

[0036] 30. Compared with the existing method of preparing and packaging the grouting materials for transportation, this method avoids the grouting materials from being damaged by rain and moisture during transportation, and avoids the grouting materials from being deteriorated and damaged due to environmental reasons and storage time during storage;

[0037] 31. Avoid environmental pollution and labor losses caused by secondary packaging and multiple handling;

[0038] 32. The horizontal sealed mixing barrel structure allows a small amount of cleaning water to flow at high speed without dead angle disturbance in the barrel, ensuring that every part of the barrel can be cleaned, greatly reducing the amount of cleaning water and time. At the same time, it is well avoided that the upper part of the vertical mixing barrel is not cleaned properly, which will cause the grouting slurry to continue to adhere, accumulate, and solidify on the inner wall of the barrel, causing adverse effects;

[0039] 33. The prepared grouting slurry is poured into the transparent water seepage test cylinder, and the water seepage test cylinder cover is covered, and then the pressurized air is introduced through the pressure air quick connector. In this way, the water seepage test of the grouting slurry can be completed on site, which is simple, convenient and fast to operate.

[0040] 34. The initial liquid level a1 of the grouting slurry is collected by the image acquisition device. After standing for 10 minutes, the compressed air valve is opened and the pressure is quickly pressurized to the test pressure through the pressure air quick connector. After pressurization for 5 minutes, the separated water level a2 and the pressurized cement slurry surface height a3 are collected by the image acquisition device. In this way, the pressure water seepage 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.

[0041] 35. The added water seepage test sealing gasket improves the sealing of the water seepage test, thereby further improving the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 The present invention is a schematic diagram of the structure of a slurry making device for prestressed duct grouting material.

[0043] Figure 2 It is a schematic diagram of the structure of the mixing barrel and the mixing paddle.

[0044] Figure 3 Schematic diagram of the structure of the stirring paddle.

[0045] Figure 4 for Figure 3 Schematic diagram of the structure after rotating 90°.

[0046] Figure 5 for Figure 1 Schematic diagram of the local enlarged structure.

[0047] Figure 6 It is a schematic diagram of the structure before the mixing barrel and the second connecting cylinder are assembled.

[0048] Figure 7 It is a schematic diagram of the structure after the mixing barrel and the second connecting cylinder are assembled.

[0049] Figure 8 It is a structural schematic diagram of the movable locking ring and the second connecting cylinder before assembly.

[0050] Fig. 9 It is a schematic diagram of the structure after the movable locking ring and the second connecting tube are assembled.

[0051] Fig.10 It is a structural diagram of the weighing mechanism.

[0052] Fig.11 It is a schematic diagram of the structure of the hopper.

[0053] Fig.12 This is a schematic diagram of the structure of the water seepage test organization.

[0054] As shown in the figure: mixing barrel 1, stirring paddle 2, stirring shaft 2a, paddle 2b, driving mechanism 3, driving motor 3a, first connecting tube 3b, coupling 3c, second connecting tube 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 connection assembly 5, connecting plate 5a, end cover 5b, movable locking ring 5c, elastic member 5d, sliding positioning card bead 5e, sliding positioning card slot 5 f, docking positioning hole 5g, docking positioning column 5h, mixing 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, plug-in ear 6f, plug-in column 6g, weighing mounting frame mounting flange 6h, movable plug operating rod 6i, pull ring 6j, bracket base 7, water tank 8, water seepage test mechanism 9, transparent water seepage test cylinder 9a, water seepage test cylinder cover 9b, pressure air quick connector 9c, image acquisition device 9d, water seepage test sealing gasket 9e. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] See also Figures 1 to 12 In an embodiment of the present invention, a slurry making device for prestressed channel grouting material comprises a mixing barrel 1 and a stirring paddle 2 that cooperate with each other, a driving mechanism 3, a sealing assembly 4, a quick-connect assembly 5, a weighing mechanism 6 and a water seepage test mechanism 9. The mixing barrel 1 is a sealing structure, the stirring paddle 2 can be installed in the mixing barrel 1 by high-speed rotation, the driving mechanism 3 is used to drive the stirring paddle 2 to rotate at high speed, the sealing assembly 4 is used for sealing the mixing barrel 1, the quick-connect assembly 5 is used for rapid installation and removal of the mixing barrel 1, the weighing mechanism 6 is used for weighing materials and conveying materials into the mixing barrel 1, and the water seepage test mechanism 9 is used to measure the water seepage rate of the prepared grouting slurry. By designing the mixing barrel 1 as a sealing structure and the stirring paddle 2 as a high-speed rotation, 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 are fully disturbed in the mixing barrel, mixed evenly, and dispersed thoroughly, creating sufficient conditions for the cement to be fully hydrated, so that the various indicators of the prepared grouting slurry are better than those of the grouting slurry prepared by the existing slurry making machine.

[0057] The mixing equipment in the pharmaceutical industry is mainly used for material mixing, including dry powder mixing and solid-liquid and liquid-liquid mixing. The speed of the mixer is not high, generally not exceeding 300rpm. The speed of the homogenizer in the chemical industry is very high, but it is mainly used for shearing, which is essentially different from the mixing barrel 1.

[0058] The upper part of the mixing barrel 1 is provided with a mixing barrel feed port, and the upper cover of the mixing barrel feed port is equipped with a sealing cover. The mixing barrel 1 is also provided with a mixing barrel water inlet and a mixing barrel discharge port. The mixing barrel water inlet is connected to the water source through a water inlet valve, and the mixing barrel discharge port is provided with a discharge valve.

[0059] The mixing barrel 1 is a horizontal structure. By designing the mixing barrel 1 as a horizontal structure, as the stirring paddle 2 rotates, the back surface of the blade 2b of the stirring paddle 2 forms a turbulent zone, and the slurry in the mixing barrel 1 will show irregular flow and mutual collision, so that the cement particles are quickly dispersed and the cement molecules are fully hydrated. The rotation speed of the stirring paddle 2 is greater than or equal to 400rpm. By designing the rotation speed of the stirring paddle 2 to be greater than or equal to 400rpm, and the blade linear velocity of the blade 2b of the stirring paddle 2 is greater than or equal to 7m / s, the high-speed rotating cement particles continuously collide with the barrel wall and shear each other under the action of centrifugal acceleration, so that the materials are fully disturbed in the mixing barrel 1, mixed evenly, and dispersed thoroughly, creating sufficient conditions for the full hydration of cement, so that the prepared grouting slurry has various indicators such as fluidity and water seepage rate that are better than the grouting slurry made by the existing pulping machine. The ratio of the rotating diameter of the blade of the stirring 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 rotation diameter of the blade of the stirring paddle 2 to the inner diameter of the stirring barrel 1 is less than 0.85, the disturbance performance of the blade 2b on the slurry becomes poor, especially in the initial stage of stirring, the mixing water will be concentrated at the bottom of the stirring barrel, making it difficult to disperse the powder, which is not conducive to rapid slurrying. 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, that is, 0.2≤(b1+b2+b3+b4) / b0≤0.80 in the figure. When 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 less than 0.2, the disturbance force of the blade 2b on the slurry is reduced, the axial fluidity of the slurry becomes worse, and it is not conducive to the dispersion of particles; when 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 greater than 0.8, the axial flow space of the slurry is reduced, resulting in the limitation of the horizontal exchange position of the slurry and the increase of the overall slurry non-uniformity. At the same time, with the increase of the effective action width of the blade, the shaft power output by the motor will increase significantly, making the equipment uneconomical.

[0060] The stirring paddle 2 comprises a stirring shaft 2a, on which at least one group of blades 2b is axially arranged, each group of blades 2b comprises at least one blade 2b arranged along the circumferential direction of the stirring shaft 2a, and the axial angle α of the blades 2b ranges from 15 to 80°. The axial angle α of the blades 2b directly affects the dispersion effect and the output torque of the motor. When α is greater than 80°, the pressure of the blades 2b on the slurry is reduced, 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 blades 2b on the slurry is increased, the disturbance of the slurry is increased, and it is also conducive to the dispersion effect of the particles, 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 groups of blades 2b are axially arranged on the stirring shaft 2a, and the axial angles α of the two adjacent groups of blades 2b are arranged in opposite directions. During high-speed rotation, since the two adjacent groups of blades 2b are staggeredly connected to the shaft and the axial angles α of the blades 2b are opposite, when the slurry is quickly thrown out along the end face and inclined surface of one group of blades 2b, it will immediately collide with the water-facing surfaces of the two adjacent groups of blades 2b, thereby improving the dispersion effect of the particles and the shear effect on the slurry.

[0061] The quick-connect assembly 5 comprises a connecting plate 5a arranged at the mouth of the mixing barrel 1 and an end cover 5b matched with the connecting plate 5a. The end cover 5b and the connecting plate 5a are both annular structures. The end cover 5b is sealed and connected to the connecting plate 5a. A movable locking ring 5c ​​which can be positioned and rotated along the circumferential direction is mounted on the outer wall of the end cover 5b. An internal thread is provided on the inner wall of the movable locking ring 5c ​​facing the connecting plate 5a. An external thread matching with the internal thread is provided on the outer wall of the connecting plate 5a. Generally, the mixing barrel 1 needs to be removed regularly for cleaning and maintenance. The existing connection methods between the mixing barrel and the end cover include flange connection, clamp connection, buckle connection and threaded connection. The flange connection needs to be tightened with bolts, and the disassembly is time-consuming and laborious. The clamp connection requires a larger chuck, and two people must be required to operate the chuck to connect the clamp. The buckle connection structure is relatively complex and requires a large space. The application scope of the threaded connection method is limited. The quick-connect assembly can easily and conveniently complete the connection and disassembly between the connecting plate 5a and the end cover 5b by rotating the movable locking ring 5c, thereby greatly reducing the labor intensity and greatly improving the efficiency.

[0062] The inner wall of the movable locking ring 5c ​​is provided with a plurality of sliding positioning beads 5e through an elastic member 5d along the circumferential direction, and the outer wall of the end cover 5b is provided with a sliding positioning groove 5f along the circumferential direction at the position corresponding to the sliding positioning beads 5e. Of course, other structures can also be used. The elastic member 5d is a spring. Of course, other types of elastic members can also be used.

[0063] 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 arranged on the end cover 5b or the connecting disk 5a, and the corresponding docking positioning column 5h is arranged on the connecting disk 5a or the end cover 5b. The additional docking positioning holes 5g and docking positioning columns 5h that cooperate with each other facilitate the connection between the end cover 5b and the connecting disk 5a, thereby further improving the efficiency. The docking positioning holes 5g are arranged at intervals along the circumferential direction of the end cover 5b or the connecting disk 5a. A stirring barrel mouth sealing ring 5i is provided between the end cover 5b and the connecting disk 5a.

[0064] The above-mentioned sealing assembly 4 includes a stirring paddle shaft sealing seat 4a, a stirring paddle shaft skeleton oil seal 4b and a first stirring paddle shaft sealing ring 4c. The middle part of the stirring paddle shaft sealing seat 4a is provided with a stirring paddle shaft mounting hole that matches the stirring shaft 2a of the stirring paddle 2. The stirring paddle shaft skeleton oil seal 4b and the first stirring paddle shaft sealing ring 4c are respectively installed in the axial direction in the stirring paddle shaft mounting hole. The middle part of the end cover 5b is provided with a sealing seat mounting hole that matches the outer diameter of the stirring paddle shaft sealing seat 4a. During installation, the stirring paddle shaft sealing seat 4a is sealed and installed in the sealing seat mounting hole, and the stirring paddle shaft sealing seat 4a is sleeved on the stirring shaft 2a of the stirring paddle 2, and the first stirring paddle shaft sealing ring 4c is arranged on the side of the blade 2b of the stirring paddle 2. When in working state, the slurry tends 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 gap of the sealing material, which becomes larger and harder particles after solidification and is not easy to be removed. Over time, the seal will be damaged and leakage will occur. If oil seals, soft packing seals, sealing rings, etc. are used alone, the above phenomenon will occur. However, the 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 sealing body along the rotating stirring shaft 2a, thereby improving the service life.

[0065] The agitator shaft seal seat 4a is provided with a seal seat convex ring 4d for easy cleaning in the middle of one side facing the blade 2b along the circumferential direction of the agitator shaft mounting hole. The added seal seat convex ring 4d can make the cleaning water form a turbulent effect at this location, so that the slurry and particles on the sealing surface of the shaft and the seal ring can be easily washed away, and the residual slurry at this location can be reduced to the greatest extent, thereby further improving the service life. A second agitator shaft seal ring 4e is provided on the inner wall of the seal seat convex ring 4d. By designing two seal rings, gaps are left between the seal rings and between the seal rings 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 of the relative movement between the agitator shaft 2a and the seal ring, which not only reduces friction but also forms a seal, thereby further improving the service life.

[0066] The second stirring paddle shaft sealing ring 4e is arranged at intervals with the first stirring paddle shaft sealing ring 4c, and the second stirring paddle shaft sealing ring 4e is arranged at the port of the sealing seat convex ring 4d facing the blade 2b. By arranging the second stirring paddle shaft sealing ring 4e at the port of the sealing seat convex ring 4d facing the 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 blade 2b, which can further reduce the gap between the inner wall of the sealing seat convex ring 4d and the stirring shaft 2a, thereby avoiding the residue of slurry and improving the service life. The outer edge of the port of the sealing seat convex ring 4d facing the blade 2b is provided with a rounded corner. By designing the outer edge of the port of the sealing seat convex ring 4d facing the blade 2b to be rounded, it is conducive to the formation of a turbulent effect, so that the slurry and particles on the sealing slurry surface of the shaft and the sealing ring can be more conveniently washed away.

[0067] The driving mechanism 3 includes a driving motor 3a for driving the stirring paddle 2 to rotate 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. The current and / or power of the driving motor 3a are measured by the additional measuring element, so that the corresponding value of the fluidity of the slurry can be obtained through the current and / or power. The measuring element is connected to a host computer. Real-time communication is achieved by connecting the measuring element to a host computer such as a CNC machine. Once the fluidity of the slurry reaches the standard, the host computer can alarm to prompt the personnel to operate, or it can directly stop the machine and alarm, thereby ensuring the best pulping effect on the one hand, and saving time and energy on the other hand.

[0068] The driving mechanism 3 also includes a first connecting tube 3b, and the output shaft end of the driving motor 3a is inserted into the first connecting tube 3b. The additional first connecting tube 3b facilitates the installation of the driving motor 3a. The output shaft of the driving motor 3a is located in the first connecting tube 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 additional 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, the coupling 3c is designed in the first connecting tube 3b, which can also play a dust-proof role. To facilitate the installation of the coupling 3c, an installation window is provided on the first connecting tube 3b, and a sealing cover can be installed on the installation window.

[0069] The driving mechanism 3 also includes a second connecting tube 3d, one end of which is coaxially connected to the first connecting tube 3b, the other end of which is connected to the end cover 5b, and the second connecting tube 3d and the driving motor 3a are respectively arranged at the two ends of the first connecting tube 3b. The second connecting tube 3d and the end cover 5b are connected as a whole by welding, and a step is formed for mounting and clamping the stirring paddle shaft sealing 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 tube 3d, and a bearing 3f matching the stirring shaft 2a of the stirring paddle 2 is installed in the bearing seat 3e. By adding the second connecting tube 3d and adding the bearing 3f for mounting the stirring paddle 2 in the second connecting tube 3d, the installation of the stirring paddle 2 is facilitated. At the same time, the stirring paddle shaft sealing seat 4a is fixed to the corresponding bearing seat 3e by bolts. There are two bearing seats 3e, which are respectively arranged on the inner walls of the two ends of the second connecting tube 3d, and there are two corresponding bearings 3f. By adopting double bearings for fixing, the high-speed rotation stability of the stirring paddle 2 is ensured, and the stirring barrel 1 is easy to be disassembled and cleaned.

[0070] The weighing mechanism 6 comprises a weighing mounting frame 6a, a weighing sensor 6b, a hopper mounting frame 6c and a hopper 6d, wherein the hopper 6d is mounted on the hopper mounting frame 6c, the hopper mounting frame 6c is mounted on the weighing sensor 6b, the weighing sensor 6b is mounted on the upper end of the weighing mounting frame 6a, and a hopper movable plug 6e for plugging the discharge port is provided at a position corresponding to the discharge port of the hopper 6d in the hopper 6d. The 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 pulping.

[0071] An inserting ear 6f is respectively provided on the outer walls on both sides of the hopper 6d, and an inserting column 6g is respectively provided at the positions corresponding to the two inserting ears 6f on the hopper mounting frame 6c, and the inserting column 6g cooperates with the inserting ears 6f. Through the additional inserting column 6g and inserting ear 6f, on the one hand, the hopper 6d can be removed for loading, which is convenient for operation. On the other hand, when the weighing sensor is broken, weighing can also be achieved by directly weighing the hopper 6d. The lower end of the weighing mounting frame 6a is provided with a weighing mounting frame mounting flange 6h with a semi-ring structure. The additional weighing mounting frame mounting flange 6h facilitates the installation and disassembly of the weighing mounting frame 6a. The lower end of the weighing mounting frame 6a is installed on the flange of the connecting tube through the weighing mounting frame mounting flange 6h.

[0072] The above-mentioned hopper movable plug 6e is a frustum structure, the small end of the frustum structure is arranged downward, and the diameter of the small end of the frustum structure is smaller than the diameter of the discharge port, and the diameter of the large 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, and arranging the small end of the frustum structure downward, and the diameter of the small end of the frustum structure is smaller than the diameter of the discharge port, and the diameter of the large end of the frustum structure is larger than the diameter of the discharge port, it is convenient for the hopper movable plug 6e to be blocked and opened. 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 on 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 the pressure of its own weight and the material, thereby opening the discharge port; and when the discharge port needs to be blocked, the hopper movable plug 6e will gradually change from a vertical state to a horizontal state during the process of putting the hopper movable plug 6e back to the discharge port by the movable plug operating rod 6i; the above operation process is simple, convenient and efficient. The upper end of the movable plug operating rod 6i is provided with a pull ring 6j for easy operation. The additional pull ring 6j facilitates manual or mechanical operation.

[0073] A water seepage test mechanism 9 is provided on the support base 7 at a position corresponding to the mixing barrel 1. The water seepage test mechanism 9 includes a transparent water seepage test cylinder 9a and a water seepage test cylinder cover 9b that cooperate with each other. Both the transparent water seepage test cylinder 9a and the water seepage test cylinder cover 9b can be made of organic glass. The transparent water seepage test cylinder 9a is installed on the support base 7. During the test, the levelness of the transparent water seepage test cylinder 9a must be ensured. A scale is provided on the outer wall of the transparent water seepage test cylinder 9a. A pressure air quick connector 9c is provided on the water seepage test cylinder cover 9b. By pouring the prepared grouting slurry into the transparent water seepage test cylinder 9a, covering the water seepage test cylinder cover 9b, and then introducing pressure air through the pressure air quick connector 9c, the water seepage test of the grouting slurry can be completed on site, and the operation is simple, convenient and fast. An image acquisition device 9d is provided on the support base 7 at a position corresponding to the scale on the outer wall of the transparent water seepage test cylinder 9a. The image acquisition device 9d is arranged toward the scale and is connected to the host computer. The initial liquid level a1 of the grouting 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 pressurized to the test pressure through the pressure air quick connector 9c. After pressurization for 5 minutes, the separated water level a2 and the pressurized cement slurry surface height a3 are collected by the image acquisition device 9d. In this way, the pressure water seepage 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 water seepage test sealing gasket 9e is provided between the transparent water seepage test cylinder 9a and the water seepage test cylinder cover 9b. The additional water seepage test sealing gasket 9e improves the sealing of the water seepage test, thereby further improving the accuracy of the test. The compressed air quick connector 9c is connected to a compressed air source, which provides a maximum pressure of not less than 0.8MPa and is equipped with a pressure gauge with a maximum reading of not less than 1.0MPa and a minimum scale value of 0.02MPa.

[0074] At the beginning of the water seepage test, inject about 200 ml of the prepared slurry into the transparent water seepage test cylinder 9a, then cover the water seepage test cylinder cover 9b tightly and connect the pressure air quick connector 9c. Start recording and record the initial height as a1. After standing for 10 minutes, open the compressed air valve and quickly pressurize to the test pressure. After pressurizing for 5 minutes, record the height of the separated water surface a2 and the height of the pressurized cement slurry surface a3.

[0075] Calculate the pressure water seepage rate (M yl ):

[0076] M yl ———Pressure water seepage rate

[0077] a1——initial cement slurry height, in millimeters (mm);

[0078] a2——height of water seepage surface, in millimeters (mm);

[0079] a3——height after pressurization, in millimeters (mm);

[0080] The above results are automatically completed by the host computer connected to the image acquisition device 9d, and the results can be automatically displayed and uploaded. In the same period, the pressure seepage rate should take the arithmetic mean (accurate to 0.1%) of two parallel test data as the test result of the period.

[0081] During installation, first install the first connecting tube 3b and the second connecting tube 3d together; then, install the bearing and the agitator shaft sealing seat 4a as well as the agitator shaft sealing ring and the agitator shaft skeleton oil seal 4b; then, insert and install the agitator 2; then, install the installed part on the bracket base 7 through the bracket, and the bracket base 7 is also equipped with a water tank 8; then align the docking positioning hole 5g and / or the docking positioning column 5h on the mixing barrel 1 with the docking positioning column 5h and / or the docking positioning hole 5g on the end cover 5b, and close them, and then buckle the threaded rotary joint locking ring 5c ​​to complete the installation of the mixing barrel 1; at the same time, complete the installation of the drive motor 3a; finally, install the weighing mechanism on the flange of the connecting tube through the weighing mounting frame mounting flange 6h. After installation, the discharge port of the hopper 6d is aligned with the mixing barrel feed port on the mixing barrel 1, and the hopper 6d is suspended.

[0082] During operation, first, remove the hopper 6d and add appropriate materials (a little less than the required materials) into it, then install the filled hopper 6d onto the hopper mounting frame 6c for weighing, and continue to add materials until the required amount of materials is reached, or directly add materials into the hopper 6d without removing the hopper 6d until the required amount of materials is reached; then, operate the movable plug operating rod 6i to pour the materials into the mixing barrel 1, and add a corresponding amount of water into the mixing barrel 1 through the water inlet valve; then, cover and seal the mixing barrel feed port on the mixing barrel 1; then start the drive motor 3a to make the stirring paddle 2 reach the preset speed, and when the measuring element detects that the fluidity of the slurry reaches the standard, it controls the drive motor 3a to stop; finally, open the discharge valve on the mixing barrel 1 to release the slurry.

[0083] The principle of the 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 as follows:

[0084] Through repeated practice in the slurry making process, it is found that: 1. After the feeding is completed, as the speed of the stirring paddle 2 increases, the power of the driving motor 3a also gradually increases significantly, reaches the maximum value after reaching the set maximum 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-cement ratios, the fluidity is different under the same stirring conditions. At this time, the fluidity and the power of the driving motor 3a measured at a certain specific speed form a good linear relationship. According to the linear relationship diagram, the calculation formula between the two can be obtained as y=ax+b (where y is power, a is a fixed constant for a certain stirring amount, x is fluidity, and b is a fixed constant for a certain stirring amount). Therefore, when the stirring amount is fixed, the driving power at a specific speed can be measured by the above calculation formula to obtain the instantaneous fluidity value.

[0085] In addition, the equipment can also realize on-site preparation and on-site use of grouting materials, and the quality of each component material can be controlled throughout the process, completely eliminating the phenomenon of fraud, and ensuring that each preparation of grouting materials fully meets the standards. Specifically, first pour cement and grouting agent (calcite powder, mineral powder, silica fume, fly ash, water reducing agent, expansion agent, defoaming agent and other dry powders) into the mixing barrel 1, of which cement accounts for about 90% and grouting agent accounts for about 10%, then cover the sealing cover, and then start the driving motor 3a until the dry powder is evenly mixed.

[0086] A method for preparing a prestressed duct grouting material comprises the following steps:

[0087] S1: pouring grouting material into the mixing barrel 1 of the slurry making equipment;

[0088] S2: Add a corresponding amount of water into the mixing barrel 1;

[0089] S3: sealed mixing tank 1;

[0090] S4: starting the driving motor 3a of the pulping equipment to make the stirring paddle 2 in the stirring barrel 1 reach a preset speed;

[0091] S5: When the power of the driving motor 3a is stabilized, the driving motor 3a is stopped.

[0092] In this embodiment, the mixing barrel 1 is designed to be a sealed structure, and the stirring paddle 2 is designed to rotate at a high speed. In this way, the cement particles rotating at a high speed continuously hit 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 mixing barrel, creating sufficient conditions for the full hydration of the cement, so that all indicators of the grouting slurry prepared are better than those of the grouting slurry prepared by the existing slurry making machine; the mixing barrel 1 is designed to be a horizontal structure, so that as the stirring paddle 2 rotates, the back water surface of the paddle 2b of the stirring paddle 2 forms a turbulent zone, and the slurry in the mixing barrel 1 will present a Irregular flow and mutual collision enable the cement particles to be quickly dispersed and the cement molecules to be fully hydrated; by designing the rotation speed of the stirring paddle 2 to be greater than or equal to 400rpm, and the blade linear speed of the blade 2b of the stirring paddle 2 to be greater than or equal to 7m / s, the high-speed rotating cement particles continuously collide with the barrel wall and shear each other under the action of centrifugal acceleration, so that the materials in the mixing barrel 1 are fully disturbed, mixed evenly, and dispersed thoroughly, creating sufficient conditions for the full hydration of the cement, so that the prepared grouting slurry has various indicators such as fluidity and water seepage rate that are better than the grouting slurry made by the existing pulping machine.

[0093] At the same time, when the ratio of the rotating diameter of the blade of the stirring paddle 2 to the inner diameter of the stirring barrel 1 is lower than 0.85, the disturbance performance of the blade 2b on the slurry becomes poor, especially in the initial stage of stirring, the mixing water will be concentrated at the bottom of the stirring barrel, resulting in difficulty in dispersing the powder, which is not conducive to rapid slurrying; the axial angle α of the blade 2b directly affects the dispersion effect and the output torque of the motor. When α is greater than 80°, the pressure of the blade 2b on the slurry is reduced, 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 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, 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 high speed, due to the staggered connection between the two adjacent groups of blades 2b and the shaft When the effective action width of the impeller 2 is less than 0.2, the disturbance force of the impeller 2b on the slurry is reduced, and the axial fluidity of the slurry is deteriorated, which is not conducive to the dispersion of particles. When the effective action width of the impeller 2 is less than 0.8, the axial flow space of the slurry is reduced, resulting in the limitation of the horizontal exchange position of the slurry and the increase of the overall slurry non-uniformity. At the same time, with the increase of the effective action width of the impeller, the shaft power output by the motor will increase significantly, making the equipment uneconomical.

[0094] Moreover, it is generally necessary to regularly remove the mixing barrel 1 for cleaning and maintenance, and the existing connection methods between the mixing barrel and the end cover include: flange connection, clamp connection, buckle connection and threaded connection. The flange connection requires bolt tightening, and disassembly is time-consuming and laborious; the clamp connection requires a larger chuck, and two people must operate when the chuck is docked and the clamp is put on; the buckle connection structure is relatively complex and requires a large space; the application range of the threaded connection method is limited, while the quick-connect assembly can easily and conveniently complete the connection and disassembly between the connecting disk 5a and the end cover 5b by rotating the movable locking ring 5c, thereby greatly reducing labor intensity and greatly improving efficiency; the additional docking positioning holes 5g and docking positioning columns 5h that cooperate with each other facilitate the connection between the end cover 5b and the connecting The connection between the disks 5a further improves the efficiency; in the working state, the slurry tends to invade the sealing component 4 along the axial direction of 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 gap of the sealing material, which becomes larger and harder particles after solidification and is not easy to be removed. Over time, the seal will be damaged and leakage will occur. If oil seals, soft packing seals, sealing rings, etc. are used alone, the above phenomenon will occur. However, the 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 sealing body along the rotating stirring shaft 2a, thereby improving the service life.

[0095] Furthermore, the added sealing seat convex ring 4d can make the cleaning water form a turbulent effect there, so that the slurry and particles on the sealing surface of the shaft and the sealing ring can be easily washed away, and the residual slurry there can be reduced to the greatest extent, thereby further improving the service life; by designing two sealing rings, gaps are left between the sealing rings and between the sealing rings 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 of the relative movement between the stirring shaft 2a and the sealing ring, which not only reduces friction but also forms a seal, thereby further improving 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 blade 2b, the second stirring paddle shaft sealing ring 4e is made as close as possible to the port of the sealing seat convex ring 4d facing the blade 2b, which can further reduce the gap between the inner wall of the sealing seat convex ring 4d and the stirring shaft 2a, thereby avoiding the residue of slurry and improving the service life; by designing the outer edge of the port of the sealing seat convex ring 4d facing the blade 2b to be rounded, it is conducive to the formation of turbulent effect, so that the slurry and particles on the sealing slurry facing surface of the shaft and the sealing ring can be more conveniently washed away.

[0096] In addition, in this embodiment, the current and / or power of the driving motor 3a is measured by an additional measuring element, 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 CNC machine to achieve real-time communication, once the fluidity of the slurry reaches the standard, the host computer can alarm to prompt the personnel to operate, or directly stop the machine to alarm, thereby ensuring the best pulping effect on the one hand, and saving time and energy on the other hand; the additional first connecting tube 3b facilitates the installation of the driving motor 3a; the additional coupling 3c facilitates the connection between the output shaft of the driving motor 3a and the stirring blade 2 The coupling 3c is designed in the first connecting tube 3b, which can also play a dust-proof role; the second connecting tube 3d is connected to the end cover 5b by welding, and a step for mounting and clamping the agitator shaft sealing seat 4a is formed, and a sealing ring is installed in the step; the second connecting tube 3d is connected to the end cover 5b by welding, and a step for mounting and clamping the agitator shaft sealing seat 4a is formed, and a sealing ring is installed in the step; by adopting double bearing fixation, the stability of the high-speed rotation of the agitator 2 is ensured, and the mixing barrel 1 is convenient for disassembly and cleaning.

[0097] In addition, the 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 pulping; through the additional plug-in column 6g and the plug-in ear 6f, on the one hand, the hopper 6d can be removed for loading, which is convenient for operation; on the other hand, when the weighing sensor is broken, weighing can also be achieved by directly weighing the hopper 6d; the additional 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 end of the frustum structure downward, and the diameter of the small end of the frustum structure is smaller than the diameter of the discharge port, and the large end of the frustum structure is directly The diameter of the hopper movable plug 6e is larger than the diameter of the discharge port, which facilitates the blocking and opening of the hopper movable plug 6e; by movably connecting the movable plug operating rod 6i on 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 the pressure of its own weight and the material, thereby opening the discharge port; and when the discharge port needs to be blocked, the hopper movable plug 6e will be put back to the discharge port by the movable plug operating rod 6i, and the hopper movable plug 6e will gradually change from a vertical state to a horizontal state; the above operation process is simple, convenient and efficient; the added pull ring 6j facilitates manual or mechanical operation.

[0098] In addition, in this embodiment, the prepared grouting slurry is poured into a transparent water seepage test cylinder, and the water seepage test cylinder cover is covered, and compressed air is introduced through a pressure air quick connector, so that the water seepage test of the grouting slurry can be completed on site, and the operation is simple, convenient and fast; the initial liquid level a1 of the grouting slurry is collected by an image acquisition device, and after standing for 10 minutes, the compressed air valve is opened and quickly pressurized to the test pressure through the pressure air quick connector. After pressurization for 5 minutes, the separated water surface height a2 and the pressurized cement slurry surface height a3 are collected by the image acquisition device, so that the pressure water seepage 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; the added water seepage test sealing gasket improves the sealing of the water seepage test, thereby further improving the accuracy of the test.

[0099] Finally, this equipment can also realize on-site preparation of grouting materials. The quality of each component material can be controlled throughout the process, completely eliminating the phenomenon of fraud and ensuring that each preparation of grouting materials fully meets the standards; compared with the existing preparation and packaging of grouting materials for transportation, it avoids the failure of grouting materials due to rain and moisture during transportation, and avoids the deterioration and failure of grouting materials due to environmental reasons and storage time during storage; it avoids environmental pollution and labor losses caused by secondary packaging and multiple handling. The horizontal sealed mixing barrel structure allows a small amount of cleaning water to flow at high speed in the barrel without dead angle disturbance, ensuring that every part of the barrel can be cleaned, greatly reducing the amount of cleaning water and time, and at the same time avoiding the adverse effects caused by the inadequate cleaning of the upper part of the vertical mixing barrel, which will cause the grouting slurry to continue to adhere, accumulate, and solidify on the inner wall of the barrel.

Claims

1. A slurry making device for prestressed duct grouting material, comprising a stirring barrel (1) and a stirring paddle (2) that cooperate with each other, a driving mechanism (3), a sealing assembly (4), a quick-connect assembly (5), a weighing mechanism (6) and a water seepage test mechanism (9), characterized in that: The mixing barrel (1) is a sealed structure. The stirring paddle (2) can be rotatably installed in the mixing barrel (1) at high speed. The driving mechanism (3) is used to drive the stirring paddle (2) to rotate at high speed. The sealing assembly (4) is used to seal the mixing barrel (1). The quick-connect assembly (5) is used to quickly install and remove the mixing barrel (1). The weighing mechanism (6) is used to weigh materials and transport the materials into the mixing barrel (1). The water seepage test mechanism (9) is used to measure the water seepage rate of the prepared grouting slurry. The quick-connect assembly (5) comprises a connecting plate (5a) arranged at the mouth of the mixing barrel (1) and an end cover (5b) matched with the connecting plate (5a). The end cover (5b) is sealed and connected to the connecting plate (5a). The outer wall of the end cover (5b) is provided with a movable locking device that can be positioned and rotated in the circumferential direction. A ring (5c), an internal thread is provided on the inner wall of the movable locking ring (5c) on the side facing the connecting disk (5a), and an external thread matching the internal thread is provided on the outer wall of the connecting disk (5a); a plurality of sliding positioning beads (5e) are installed on the inner wall of the movable locking ring (5c) along the circumferential direction through an elastic member (5d), and a sliding positioning groove (5f) is provided on the outer wall of the end cover (5b) along the circumferential direction at the position corresponding to the sliding positioning beads (5e); a docking positioning hole (5g) and a docking positioning column (5h) matching 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 slurry making equipment of the prestressed duct grouting material according to claim 1 is characterized in that: The stirring barrel (1) is of a horizontal structure, and the rotation speed of the stirring paddle (2) is greater than or equal to 400 rpm.

3. The slurry making equipment of the prestressed duct grouting material according to claim 1 is characterized in that: The stirring paddle (2) comprises a stirring shaft (2a), wherein at least one group of blades (2b) is arranged along the axial direction of the stirring shaft (2a), 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°; when at least two groups of blades (2b) are arranged along the axial direction of the stirring shaft (2a), the axial angles α of two adjacent groups of blades (2b) are arranged in opposite directions.

4. The slurry making equipment of the prestressed duct grouting material according to claim 1 is 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, and 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 slurry making equipment of the prestressed duct grouting material according to claim 1 is 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).

6. The slurry making equipment of the prestressed duct grouting material according to claim 5, characterized in that: The sealing assembly (4) comprises a stirring paddle shaft sealing 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 matching the stirring shaft (2a) of the stirring paddle (2) is provided in the middle of the stirring paddle shaft sealing seat (4a); the stirring paddle shaft skeleton oil seal (4b) and the first stirring paddle shaft sealing ring (4c) are respectively installed in the stirring paddle shaft mounting hole along the axial direction; a sealing seat mounting hole matching the outer diameter of the stirring paddle shaft sealing seat (4a) is provided in the middle of the end cover (5b); during installation, the stirring paddle shaft sealing seat (4a) is sealingly installed in the sealing seat mounting hole, and the stirring paddle shaft sealing seat (4a) is sleeved on the stirring shaft (2a) of the stirring paddle (2); and the first stirring paddle shaft sealing ring (4c) is arranged toward the side of the blade (2b) of the stirring paddle (2).

7. The slurry making equipment of the prestressed duct grouting material according to claim 6 is characterized in that: A sealing seat convex ring (4d) for easy cleaning is provided at the middle of a side surface of the stirring paddle shaft sealing seat (4a) facing the paddle (2b) along the circumferential direction of the stirring paddle shaft mounting hole; a second stirring paddle shaft sealing ring (4e) is provided on the inner wall of the sealing seat convex ring (4d); the second stirring paddle shaft sealing ring (4e) is arranged at an interval with the first stirring paddle shaft sealing ring (4c), and the second stirring paddle shaft sealing ring (4e) is arranged at the end of the sealing seat convex ring (4d) facing the paddle (2b); and a rounded corner is provided on the outer edge of the end of the sealing seat convex ring (4d) facing the paddle (2b).

8. The slurry making equipment of the prestressed duct grouting material according to claim 1 is characterized in that: The driving mechanism (3) comprises a driving motor (3a) for driving the stirring paddle (2) to rotate and a measuring element for measuring the current and / or power of the driving motor (3a), wherein the measuring element is connected to the driving motor (3a); the measuring element is connected to a host computer; the driving mechanism (3) further comprises a first connecting tube (3b), wherein an output shaft end of the driving motor (3a) is inserted into the first connecting tube (3b); The output shaft of the driving motor (3a) is located in the first connecting tube (3b), and a coupling (3c) for connecting to the stirring shaft (2a) of the stirring paddle (2) is installed on the output shaft of the driving motor (3a); the second connecting tube (3d) is also included, one end of the second connecting tube (3d) is coaxially connected to the first connecting tube (3b), the other end of the second connecting tube (3d) is connected to the end cover (5b), and the second connecting tube (3d) and the driving motor (3a) are respectively arranged at the two ends of the first connecting tube (3b); a bearing seat (3e) is provided on the inner wall of the second connecting tube (3d), and a bearing (3f) matching the stirring shaft (2a) of the stirring paddle (2) is installed in the bearing seat (3e); the number of the bearing seats (3e) is two, and the two bearing seats (3e) are respectively arranged on the inner walls at the two ends of the second connecting tube (3d), and the number of the bearings (3f) is also two.

9. The slurry making equipment of the prestressed duct grouting material according to claim 1, characterized in that: The weighing mechanism (6) comprises a weighing mounting frame (6a), a weighing sensor (6b), a hopper mounting frame (6c) and a hopper (6d); the hopper (6d) is mounted on the hopper mounting frame (6c), the hopper mounting frame (6c) is mounted on the weighing sensor (6b), the weighing sensor (6b) is mounted on 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) in the hopper (6d); an inserting ear (6f) is provided on the outer walls of both sides of the hopper (6d), and two inserting ears (6f) are provided on the hopper mounting frame (6c) corresponding to the two An insertion column (6g) is provided at the position of the insertion ear (6f), and the insertion column (6g) cooperates with the insertion ear (6f); a weighing mounting frame mounting flange (6h) of a semi-ring structure is provided at the lower end of the weighing mounting frame (6a); the hopper movable plug (6e) is a frustum structure, the small end of the frustum structure is arranged downward, and the diameter of the small end of the frustum structure is smaller than the diameter of the discharge port, and the diameter of the large end of the frustum structure is larger than the diameter of the discharge port; a movable plug operating rod (6i) is movably connected to one side of the hopper movable plug (6e); and a pull ring (6j) for convenient operation is provided at the upper end of the movable plug operating rod (6i).

10. The slurry making equipment of prestressed duct grouting material according to claim 1, characterized in that: The water seepage test mechanism (9) comprises a transparent water seepage test cylinder (9a) and a water seepage test cylinder cover (9b) which cooperate with each other, a scale being provided on the outer wall of the transparent water seepage test cylinder (9a), and a pressure air quick connector (9c) being provided on the water seepage test cylinder cover (9b); and also comprises an image acquisition device (9d), the image acquisition device (9d) being arranged toward the scale; and a water seepage test sealing gasket (9e) being provided between the transparent water seepage test cylinder (9a) and the water seepage test cylinder cover (9b).

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