A low-temperature environment fast-cured high polymer grouting material, a preparation method and equipment

Abstract

The application belongs to the technical field of polyurethane grouting materials, and discloses a high polymer grouting material capable of being rapidly cured in a low-temperature environment, which is formed by mixing A component and B component, and the content of each component is as follows in terms of weight fraction: A component: 100 parts of polymethylene polyphenyl polyisocyanate; B component: 35 parts of polyether polyol A, 15 parts of polyester polyol B, 5-15 parts of Mannich base, 10 parts of flame retardant, 1.5 parts of foaming catalyst, 0.5 parts of gel catalyst, 0.5 parts of surfactant, 5 parts of physical foaming agent, 1.0 parts of chemical foaming agent and 5 parts of plasticizer. The Mannich base curing agent is added to the B component during preparation of the two-component polyurethane grouting material, and is uniformly mixed with other materials, so that the high polymer grouting material can be rapidly cured in a low-temperature environment.

Description

Technical Field

[0001] This invention relates to the field of polyurethane grouting materials technology, specifically to a low-temperature environment rapidly curing polymer grouting material, its preparation method, and equipment. Background Technology

[0002] Polyurethane grouting materials for low-temperature environments suffer from the following problems: increased viscosity, making them difficult to pump, inject, and penetrate; slower reaction and extremely slow curing; and unstable foaming ratio, easily leading to failure to foam. Currently, in the construction industry, physical heating measures are often used when constructing in low-temperature environments. For example, preheating components A and B to 15-25℃ in a greenhouse or heating box before construction; heat tracing and insulation of the delivery pipeline and mixing head; and preheating the cracks and substrate to be grouted using hot air guns and infrared lamps. These operations are cumbersome and require continuous equipment to maintain the temperature, resulting in low tolerance for error and frequently affecting grouting efficiency and effectiveness. Therefore, a grouting material suitable for low-temperature environments and capable of rapid curing is needed. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a low-temperature environment rapid curing polymer grouting material, preparation method and equipment. By adding Mannes' base curing agent to component B during the preparation of the two-component polyurethane grouting material and mixing it evenly with other materials, the rapid curing of the low-temperature environment polymer grouting material can be achieved.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a low-temperature environment rapidly curing polymer grouting material, which is composed of a mixture of component A and component B, wherein the content of each component by weight is as follows: component A: 100 parts of polymethylene polyphenyl polyisocyanate; component B: 35 parts of polyether polyol A, 15 parts of polyester polyol B, 5-15 parts of Mannich base, 10 parts of flame retardant, 1.5 parts of foaming catalyst, 0.5 parts of gel catalyst, 0.5 parts of surfactant, 5 parts of physical foaming agent, 1.0 part of chemical foaming agent, and 5 parts of plasticizer.

[0005] Furthermore, the polymethylene polyphenyl polyisocyanate is crude MDI, the polyether polyol A is ZS-4110, the polyester polyol B is PS-3152, the flame retardant is triethyl phosphate, the foaming catalyst is triethylenediamine solution, the gel catalyst is dibutyltin dilaurate, the surfactant is L6950, the physical foaming agent is HCFC-141b, the chemical foaming agent is deionized water, and the plasticizer is DOP.

[0006] A method for preparing a polymer grouting material that cures rapidly in a low-temperature environment includes the following steps: Prepare the raw materials for component A and component B separately, and perform pretreatment. Preparation of component A: Crude MDI is added to the component A reaction vessel, the vacuum system is turned on to make the vacuum degree ≤ -0.095MPa, the heating system is turned on to heat the reaction vessel to 60-70℃, and then the mixture is stirred and dehydrated for 1-2 hours; after the reaction is completed, the temperature is lowered to below 40℃, filtered and sent to the finished product storage tank. Preparation of Component B: Add polyether polyol A (35 parts) and polyester polyol B (15 parts) to the Component B reactor; use the connector disconnection structure to disconnect the raw material pipeline from the Component B reactor, then turn on the stirring unit, vacuum system and swing structure, heat to 100-120℃, and dehydrate for 2-3 hours under vacuum degree ≤-0.095MPa until the moisture content is below 0.05%; when raw materials need to be added, use the swing structure to move the Component B reactor to the initial position, then use the connector disconnection structure to connect the raw materials to the Component B reactor, and then disconnect the feeding pipeline from the Component B reactor; After dehydration is complete, stop the oscillating structure to stop the B component reactor, turn off the heating, turn on the cooling water to cool the material to below 40°C, and slowly add 10 parts of Mannich base through a metering pump under nitrogen protection. Then turn on the stirring unit and oscillating structure again and stir for 30 minutes until uniform. Keep stirring, then add 10 parts of flame retardant and 5 parts of plasticizer in sequence, and stir for 20-30 minutes; Add 0.5 parts of surfactant, 1.5 parts of triethylenediamine catalyst, and 0.5 parts of dibutyltin dilaurate; Check the temperature inside the reactor to ensure it is below 30°C; first add 1.0 part of chemical foaming agent and stir quickly for 5 minutes; then slowly add 5 parts of physical foaming agent and continue stirring for 10 minutes. During this stage, maintain a slight positive pressure or normal pressure inside the reactor to prevent the foaming agent from evaporating. After all materials are added, turn on the vacuum system and stir under negative pressure for 20 to 30 minutes to remove air bubbles introduced during the mixing process; After the vacuum is broken, the material is fed into the B component finished product storage tank through the discharge unit and filtered at the same time.

[0007] The equipment used in the preparation method includes an A-component preparation system and a B-component preparation system mounted on a foundation pier; The A component preparation system includes at least one A component storage unit for storing raw materials, an A component reaction vessel for reacting the raw materials, an A component finished product storage tank for receiving the finished product, a first discharge unit for connecting the A component storage unit and the A component reaction vessel, and a first feeding unit for connecting the A component reaction vessel and the A component finished product storage tank. The component B preparation system includes: The first storage unit for component B includes at least one storage tank and is disposed on a foundation pier. The second storage unit for component B is located on the foundation pier and includes at least one storage tank. The B-component reactor is used to provide space for the raw material reaction. The B-component reactor is equipped with a stirring unit and several receiving pipes, and valves are installed on the receiving pipes. Component B finished product storage tank; The second discharge unit is used to connect the B component finished product storage tank and the B component reaction vessel; Several sets of second feeding units, each second feeding unit includes a feeding pipe, one end of which is connected to the first storage unit and the second storage unit of component B, and the other end is detachably connected to the receiving pipe of the reactor of component B. The swing structure is configured to allow the B-component reactor to swing left and right while rotating; The interface disconnection structure is configured to disconnect the feed pipe from the receiving pipe when it is not necessary to add raw materials to the B component reactor.

[0008] Furthermore, the oscillating structure includes: The ring frame has a base block fixed at its bottom for support. The base block is fixed on the foundation pier. Fixing frames are fixedly installed on the left and right sides of the ring frame. The fixing frames are fixedly connected to the foundation pier by bolts. Two sets of stabilizing mechanisms are respectively set at the top and bottom of the B-component reactor and connected to the B-component reactor and the annular frame. Two sets of swing mechanisms are respectively set on the left and right sides of the B-component reactor and connected to the B-component reactor and the ring frame. At least one motor, the output of which is connected to the swing mechanism; The support frame is fixed to the foundation pier, and the motor is fixed to the support frame.

[0009] Furthermore, stabilizing institutions include: Support components are fixedly connected to the B-component reactor and are spaced at intervals. The connector has one end rotatably connected to the support member and the other end has a groove with a roller inside. A sliding shaft passes through the connector and the roller in the front-to-back direction. The two ends of the sliding shaft extend beyond the front and rear end faces of the connector, and the sliding shaft is rotatably connected to both the connector and the roller. The first limiting groove is formed on the inner side wall of the ring frame, and the roller rolls in cooperation with the bottom of the first limiting groove. The second limiting groove is formed by the inner wall of the first limiting groove being recessed forward and backward respectively, and the two ends of the sliding shaft are respectively in rolling engagement with the inner wall of the second limiting groove.

[0010] Furthermore, the swing mechanism includes: The drive shaft passes through the inside of the ring frame in the left-right direction and is connected to the motor drive. The push plate is located inside the annular frame. The push plate includes a first plate fixedly connected to the drive shaft in the front-to-back direction, and a second plate integrally formed with the first plate. The surface of the second plate is intersected with the surface of the first plate. The second plate is connected to a pusher, which is connected to the B-component reactor. The two pushers are located on the same straight line. The line connecting the two pushers intersects with the line connecting the two connecting bodies.

[0011] Furthermore, interface decoupling from the structure includes: Mounting frame, which is fixed to the foundation pier and / or the swing structure; The limiting sleeve is fixedly connected to the mounting frame, and the feeding pipe passes through the limiting sleeve. A pushing component is fixedly connected to a mounting frame and includes a fixed end and a movable end, wherein the fixed end is fixedly connected to the mounting frame and the movable end is fixedly connected to the feeding pipe; A metal pipe is fixedly connected to the end of a feeding pipe. A frustum-shaped fixed body is fixedly fitted on the outside of the metal pipe. A frustum-shaped movable body is movably fitted on the outside of the metal pipe. A first spring is fitted on the outside of the metal pipe. One end of the first spring is fixedly connected to the metal pipe, and the other end is fixedly connected to the movable body, so that the movable body can move along the metal pipe. Two limiting holes are located on the same straight line, above the valve and spaced apart. Each limiting hole extends radially outward from the inner wall of the receiving pipe. A movable rod is slidably mounted within each limiting hole, and a second spring is sleeved on the outer side of the movable rod. One end of the second spring, near the outer wall of the receiving pipe, is fixedly connected to the limiting hole, and the other end is fixedly connected to the movable rod. The push block is fixedly installed at one end of the movable rod near the inner wall of the receiving tube. The vertical cross-section of the push block is a right trapezoid, and the upper base dimension is smaller than the lower base dimension. The arc-shaped piece is semi-circular with a central angle of 180°. The arc-shaped piece is fixed to the bottom of the push block, and the horizontal direction of the contact point with the push block does not exceed the end of the push block. The third limiting groove is used to accommodate the arc-shaped piece and is opened horizontally along the radial direction from the inner side wall of the receiving pipe.

[0012] Furthermore, the bottom surface of the fixed body is smaller than the top surface, while the bottom surface of the movable body is larger than the top surface. When the metal pipe is inserted into the receiving pipe, the top surface of the fixed body abuts against the lower surfaces of the two arc-shaped pieces, and an annular sealing ring is provided on the top surface of the fixed body.

[0013] The beneficial effects of this invention are as follows: 1. By adding Mannich base to component B during the preparation of the two-component polyurethane grouting material and mixing it evenly with other materials, the molecular structure of Mannich base endows it with extremely high reactivity. Its molecule contains both highly reactive amine groups and phenolic hydroxyl groups. The amine groups, especially primary and secondary amines, can react extremely rapidly with the isocyanate groups in polyurethane component A at low temperatures. Moreover, Mannich base is not only a reactant, but its phenolic hydroxyl structure also has a catalytic effect on the reaction of isocyanate with polyol (or water), which can further reduce the overall reaction activation energy. Therefore, it can achieve rapid curing of polymer grouting materials in low-temperature environments.

[0014] 2. By setting up a swing structure that allows the reactor to swing and rotate within a certain range, the phenomenon of wall adhesion during the stirring process, as well as the physical adhesion deposition and chemical cross-linking solidification of the inner wall of the B component reactor, can be reduced. It can also improve the mixing efficiency and facilitate cleaning when changing the grouting material. The interface detachment structure is mainly to cooperate with the swing structure and at the same time reduce the impact of stirring vibration on the connection. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure; Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 for Figure 2 Enlarged structural diagram at point B; Figure 4 A schematic diagram of the equipment used to prepare component A; Figure 5 This is a schematic diagram of a swing structure; Figure 6 This is a schematic diagram of the cross-sectional structure of the ring frame; Figure 7 To illustrate the structure of the plate; Figure 8 This is a three-dimensional schematic diagram of a flared tube; Figure 9 This is a schematic diagram of the cross-section of the pipe. Figure 10 This is a schematic diagram of the sealing assembly structure.

[0016] In the diagram: 1. Foundation pier; 2. Component A storage unit; 3. Component A reactor; 301. First discharge unit; 4. Component A finished product storage tank; 5. First feeding unit; 6. Column; 7. Support plate; 8. Mounting frame; 9. Component B first storage unit; 10. Ring frame; 11. Component B finished product storage tank; 12. Component B second storage unit; 13. Fixing frame; 14. Component B reactor; 15. Stirring unit; 16. Support component; 17. Connector; 18. Roller; 19. Sliding shaft; 20. First limiting groove; 21. Second limiting groove. 22. Groove; 23. Drive shaft; 24. Push plate; 25. First plate; 26. Second plate; 27. Pushing component; 28. Reinforcing body; 29. ​​Feeding pipe; 20. Limiting sleeve; 31. Pushing component; 32. Connecting ring; 33. Metal pipe; 34. Fixed body; 35. Moving body; 36. First spring; 37. Receiving pipe; 38. Flared pipe; 39. Valve; 40. Limiting hole; 41. Moving rod; 42. Second spring; 43. Pushing block; 44. Third limiting groove; 45. Arc-shaped piece; 46. Support frame; 47. Motor. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The directional terms mentioned in this invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this invention and are not absolute limitations on the actual use.

[0019] Example 1: like Figure 1-10 As shown, a low-temperature environment rapidly curing polymer grouting material is composed of a mixture of component A and component B. The content of each component by weight is as follows: Component A: 100 parts of polymethylene polyphenyl polyisocyanate; Component B: 35 parts of polyether polyol A, 15 parts of polyester polyol B, 10 parts of Mannich base, 10 parts of flame retardant, 1.5 parts of foaming catalyst, 0.5 parts of gel catalyst, 0.5 parts of surfactant, 5 parts of physical foaming agent, 1.0 part of chemical foaming agent, and 5 parts of plasticizer.

[0020] The polymethylene polyphenyl polyisocyanate is crude MDI, polyether polyol A is ZS-4110, polyester polyol B is PS-3152, flame retardant is triethyl phosphate, foaming catalyst is triethylenediamine solution, gel catalyst is dibutyltin dilaurate, surfactant is L6950, physical foaming agent is HCFC-141b, chemical foaming agent is deionized water, and plasticizer is DOP.

[0021] Temperature: -5℃; gel time: 60-90s; foaming ratio: 5.0-6.0; performance: fast curing, fine foam, and high strength.

[0022] A method for preparing a polymer grouting material that cures rapidly in a low-temperature environment includes the following steps: Prepare the raw materials for components A and B separately, and perform pretreatment; pretreatment includes checking the appearance of the raw materials to confirm that there are no foreign objects. Preparation of component A: Crude MDI is added to the component A reaction vessel, the vacuum system is turned on to make the vacuum degree ≤ -0.095MPa, the heating system is turned on to heat the reaction vessel to 60-70℃, and then the mixture is stirred and dehydrated for 1-2 hours; after the reaction is completed, the temperature is lowered to below 40℃, filtered and sent to the finished product storage tank. Preparation of Component B: Add 35 parts of polyether polyol A and 15 parts of polyester polyol B to the Component B reactor; detach the feed pipe from the Component B reactor using the disconnector; then turn on the stirring unit, vacuum system, and oscillating structure; heat to 100–120°C; dehydrate under a vacuum of ≤-0.095 MPa for 2–3 hours until the moisture content is below 0.05%; when additional feed is needed, move the Component B reactor to its initial position using the oscillating structure; then connect the feed pipe to the Component B reactor using the disconnector; finally, disconnect the feed pipe from the Component B reactor. The initial position is the position when the feed unit is connected to the reactor. After dehydration is complete, stop the oscillating structure to stop the B component reactor, turn off the heating, turn on the cooling water to cool the material to below 40°C, and slowly add 10 parts of Mannich base through a metering pump under nitrogen protection. Then turn on the stirring unit and oscillating structure again and stir for 30 minutes until uniform. Keep stirring, then add 10 parts of flame retardant and 5 parts of plasticizer in sequence, and stir for 20-30 minutes; Add 0.5 parts of surfactant, 1.5 parts of triethylenediamine catalyst, and 0.5 parts of dibutyltin dilaurate; Check the temperature inside the reactor to ensure it is below 30°C; first add 1.0 part of chemical foaming agent and stir quickly for 5 minutes; then slowly add 5 parts of physical foaming agent and continue stirring for 10 minutes. During this stage, maintain a slight positive pressure or normal pressure inside the reactor to prevent the foaming agent from evaporating. After all materials are added, turn on the vacuum system and stir under negative pressure for 20 to 30 minutes to remove air bubbles introduced during the mixing process; After the vacuum is broken, the material is fed into the B component finished product storage tank through the discharge unit and filtered at the same time.

[0023] like Figure 5 The direction shown is defined as positive. Figure 5 Left and right are defined as the left and right directions of the device. For example... Figure 5 The direction shown is defined as positive. Figure 5 Left and right are defined as the left and right directions of the device.

[0024] The equipment for the preparation method is set on the foundation pier 1, including an A-component preparation system and a B-component preparation system set on the foundation pier 1; The component A preparation system includes at least one component A storage unit 2 for storing raw materials, a component A reaction vessel 3 for reacting the raw materials, a component A finished product storage tank 4 for receiving the finished product, a first discharge unit 301 for connecting the component A storage unit 2 and the component A reaction vessel 3, and a first feeding unit 5 for connecting the component A reaction vessel 3 and the component A finished product storage tank 4; the first feeding unit 5 includes a feeding pipe, a metering pump, and a valve; the first discharge unit 301 includes a feeding pipe, a valve, a metering pump, or a liquid pump. The A component preparation system also includes a nitrogen system to protect the A component storage unit 2, a vacuum system to apply a vacuum environment to the A component reaction vessel 3, a heating system, and a temperature control system; the vacuum system includes a vacuum pump and a buffer tank, and the heating system includes a heat transfer oil or steam jacket; the metering pump has the function of metering, extracting and conveying raw materials, and the metering pump can be GM0500, B921-498SI, etc. as needed; all of the above equipment are commonly used in the present. The component B preparation system includes a first component B storage unit 9, which includes at least one storage tank for storing raw materials used in small quantities. The second storage unit 12 for component B includes at least one storage tank for storing raw materials used in large quantities; its structure is the same as that of the first feeding unit 5; a column 6 is provided on the foundation pier 1, and a support plate 7 is provided on the column 6; the first storage unit 9 for component B and / or the second storage unit 12 for component B may or may not be provided on the support plate 7. Component B reactor 14 is used to provide space for raw material reaction. Component B reactor 14 is equipped with a stirring unit and several receiving pipes 34. Valves 36 are installed on the receiving pipes 34. It can be an FSH series or K-type open reactor, which generally includes a three-layer structure: outer shell, jacket and inner liner; a flared pipe 35 is installed at the top of the receiving pipe 34. Component B finished product storage tank 11; The second discharge unit is used to connect the B component finished product storage tank 11 and the B component reaction vessel 14; its structure is the same as that of the first discharge unit 301. Several sets of second feeding units, each second feeding unit includes a feeding pipe 26, one end of which is connected to the first storage unit 9 and the second storage unit 12 of component B, and the other end is detachably connected to the receiving pipe 34 of the reactor 14 of component B. The swing structure is configured to allow the B-component reactor 14 to swing left and right while rotating; The interface disconnection structure is configured to disconnect the feed pipe 26 from the receiving pipe 34 when no raw material needs to be added to the B-component reactor 14, and to ensure that it does not interfere with the movement of other equipment.

[0025] The swing structure includes: a ring frame 10, a base block for supporting it fixed at the bottom of the ring frame 10, the base block fixed on the base pier 1, and fixed frames 13 fixedly installed on the left and right sides of the ring frame 10 respectively, the fixed frames 13 being fixedly connected to the base pier 1 by bolts. Two sets of stabilizing mechanisms are arranged symmetrically about the center of the annular frame 10. The two sets of stabilizing mechanisms are respectively set at the top and bottom of the B-component reactor 14 and connect the B-component reactor 14 and the annular frame 10. Two sets of swing mechanisms are respectively set on the left and right sides of the B-component reactor 14 and connected to the B-component reactor 14 and the annular frame 10. At least one motor 44, the output end of which is connected to the swing mechanism; Support frame 43 is fixed on foundation pier 1, and motor 44 is fixed on support frame 43.

[0026] The stabilizing mechanism includes a support member 16, which is fixedly connected to the B-component reactor 14 by several rods and is spaced apart. The horizontal cross-sectional dimension of the support member 16 is smaller than the top and bottom surface dimensions of the B-component reactor 14. Connector 17, one end of connector 17 is rotatably connected to support member 16, and the other end is provided with a groove. Roller 18 is provided in the groove. Slide shaft 19 is passed through the interior of connector 17 and roller 18 in the front-to-back direction. The two ends of slide shaft 19 extend beyond the front and rear end faces of connector 17 respectively. Slide shaft 19 is rotatably connected to connector 17 and roller 18. The first limiting groove 20 is formed on the inner wall of the annular frame 10. The first limiting groove 20 is formed by the radial outward indentation of the inner wall of the annular frame 10. The inner and outer are defined according to the center of the annular frame 10. The roller 18 rolls with the bottom of the first limiting groove 20. The first limiting groove 20 includes a groove bottom and two inner sidewalls with a front-to-back spacing. The second limiting groove 21 is formed inside the annular frame 10 and communicates with the first limiting groove 20. The second limiting groove 21 is formed by the inner sidewalls of the first limiting groove 20 being recessed forward and backward respectively. The second limiting groove 21 is divided into front and rear parts by the first limiting groove 20. Both parts include two inner sidewalls with an upper and lower gap and a groove bottom. The two ends of the sliding shaft 19 are respectively in rolling engagement with the inner sidewalls of the second limiting groove 21.

[0027] The swing mechanism includes a drive shaft 22, which passes through the ring frame 10 in the left-right direction. The drive shaft 22 is connected to the motor 44. The motor 44 can be a YZR series, such as YZR315M-8.

[0028] The push plate 23 is located inside the annular frame 10. The push plate 23 includes a first plate 2301 fixedly connected to the drive shaft 22 along the front-back direction, and a second plate 2302 integrally formed with the first plate 2301. The surface of the second plate 2302 intersects the surface of the first plate 2301. The second plate 2302 is connected to a pusher 24, which is connected to the B-component reactor 14. A solidifying agent 25 is provided at the connection between the B-component reactor 14 and the pusher 24. The two pushers 24 are located on the same straight line. The two first plates 2301 are arranged in parallel, and the two second plates 2302 are arranged in parallel. The line connecting the two pushers 24 intersects the line connecting the two connecting bodies 17. The two lines form a cross shape on the same plane, and the intersection point is located at the center of the annular frame 10. The annular frame 10 has several centers.

[0029] During the stirring process, especially when the impeller rotates at high speed, a strong centrifugal force is generated, continuously throwing the material towards the same spot on the reactor wall. Although the flow field inside the reactor is complex, a "target area" of frequent, high-kinetic-energy impacts is formed in the tangential region of the impeller blades and the splashing zone where the liquid surface fluctuates violently. This is a relatively fixed area of ​​high-frequency impact. Solid fillers (such as calcium carbonate and quartz powder), pigments, or incompletely dispersed thickeners in the slurry are most likely to adhere to the reactor wall first when impacted. As the slurry continues to cover the surface, water or solvent evaporates as the reactor heats up, causing the adhered layer to gradually concentrate and compact. If the material contains reactive components, a slow, localized chemical reaction may even occur on the wall surface, forming a hard, dense scale layer that is firmly bonded to the inner wall of the reactor. This is no longer a simple adhesion but a solid deposit that requires mechanical force to remove. These deposits must be removed by high-pressure water jets (often requiring pressures above 700 bar), manual scraping, or strong corrosive chemical cleaning, which is time-consuming, labor-intensive, and may damage the smoothness of the inner wall of the reactor.

[0030] Moreover, component B prepolymer is usually more difficult to handle than component A. Its wall-mounted deposits not only have physical adhesion and deposition properties, but also chemical cross-linking and solidification properties. Therefore, a swivel structure is more necessary. During the stirring process, the angle is adjusted to adjust the position where the material is continuously thrown, reducing the hardness and density of the wall-mounted scale layer, which greatly facilitates cleaning. At the same time, it can also save costs and improve the service life of the equipment.

[0031] In addition, Mannich bases typically have high viscosity and poor fluid flow, making them more likely to adhere to the inner wall of the reaction chamber during stirring and less likely to be carried away by the main flow field. Therefore, the oscillating structure is designed to make the process more adaptable to the added Mannich base.

[0032] The interface detachment structure includes: a mounting frame 8, which is fixed to the foundation pier 1 and / or the annular frame 10 of the swing structure; A limiting sleeve 27 is fixedly connected to the mounting frame 8, and the feeding pipe 26 passes through the limiting sleeve 27. The pushing component 28 is fixedly connected to the mounting frame 8 and includes a fixed end and a movable end. The fixed end is fixedly connected to the mounting frame 8, and the movable end is fixedly connected to the feeding pipe 26 through a connecting ring 29. The pushing component 28 is an electric push rod or a cylinder and can be remotely controlled by a wireless network module and controller. A metal pipe 30 is fixedly connected to the end of a feeding pipe 26. A frustum-shaped fixed body 31 is fixedly fitted on the outside of the metal pipe 30. A frustum-shaped movable body 32 is movably fitted on the outside of the metal pipe 30. A freely extendable first spring 33 is fitted on the outside of the metal pipe 30. One end of the first spring 33 is fixedly connected to the metal pipe 30, and the other end is fixedly connected to the movable body 32, allowing the movable body 32 to move along the metal pipe 30. The movable body 32 is located between the first spring 33 and the fixed body 31. Two limiting holes 37 are located on the same straight line. These limiting holes 37 are positioned above the valve 36 and spaced apart to provide sufficient space for the metal pipe 30 to insert and remove. The two limiting holes 37 are radially extended outwards from the inner wall of the receiving pipe 34. A movable rod 38 is slidably disposed within each of the two limiting holes 37. A second spring 39 is sleeved on the outer side of each movable rod 38. The second spring 39 has two ends, one near the outer wall and the other near the inner wall of the receiving pipe 34. The end of the second spring 39 near the outer wall of the receiving pipe 34 is fixedly connected to the limiting hole 37, and the other end is fixedly connected to the movable rod 38. The movable rod 38 also has two ends, one near the outer wall and the other near the inner wall of the receiving pipe 34. Push block 40, higher than valve 36, is fixedly installed at one end of movable rod 38 near the inner wall of receiving pipe 34. Push block 40 includes two opposite ends, one end connected to movable rod 38 and the other end away from movable rod 38. The end of push block 40 away from movable rod 38 is provided with a slope. The vertical cross section of push block 40 is a right trapezoid, and the upper base dimension is smaller than the lower base dimension. The arc-shaped piece 42 is semi-circular with a central angle of 180°. The arc-shaped piece 42 is fixed to the bottom of the push block 40, and the contact point with the push block 40 extends inward in the horizontal direction no more than the end of the push block 40. The inward refers to the position of the center line of the receiving pipe 34. The two arc-shaped pieces 42 are horizontally spliced ​​to form a circle. The third limiting groove 41 is used to accommodate the arc-shaped piece 42, which is higher than the valve 36 and is opened horizontally along the radial direction from the inner wall of the receiving pipe 34.

[0033] When the metal pipe 30 is vertical, the bottom surface dimension of the fixed body 31 is smaller than the top surface dimension, and the bottom surface dimension of the movable body 32 is larger than the top surface dimension. When the metal pipe 30 passes through the inside of the receiving pipe 34, the top surface of the fixed body 31 abuts against the lower surfaces of the two arc-shaped pieces 42. The top surface of the fixed body 31 is provided with an annular sealing ring, which can help seal when abutting.

[0034] Either the metal pipe 30 or the flared pipe 35 is made of magnet, while the other can be made of magnetic material or magnet. The two attract each other, but the attraction cannot be too strong, so as not to affect the insertion and removal of the metal pipe 30. The attraction is used in conjunction with the tough and flexible material of the feeding pipe 26 to help to accurately locate the flared pipe 35 and insert it into it. Moreover, the weight of the metal pipe 30 is more conducive to the insertion of the receiving pipe than the feeding pipe 26 of the same volume. Push the push block 40 open, then withdraw it slightly to abut against the arc-shaped plate 42, open the valve 36, and start feeding.

[0035] The interface detachment structure is primarily designed to complement the swing mechanism. While redundant piping doesn't affect angle adjustment during stirring (because the adjustment process is generally slow, with minimal swinging and rotation, and the range of swinging and rotation is small and predictable), high-speed stirring in the B-component reactor can cause chamber vibration, significantly impacting pipe connections. For example, vibration can loosen flange bolts, cause abnormal detachment, and malfunction instruments such as thermometers and pressure sensors, leading to inaccurate readings or damage. Therefore, the interface detachment structure completely eliminates the impact on angle adjustment, prevents pipe entanglement, and extends the lifespan of connecting fittings. Furthermore, the interface detachment structure can be used independently even without the swing mechanism.

[0036] When the motor 44 starts, the first plate 2301 rotates, driving the second plate 2302 to rotate. Since the second plate 2302 is tilted, its different positions in the left and right directions will drive the B component reactor 14 to rotate, and its different positions in the up and down directions will mainly cause it to swing. The connecting body 17 is rotatably connected to the support member 16, so the rotation and swing will not interfere with each other.

[0037] The feed tube 26 is made of polyurethane (PU) tube, which has excellent bending performance, strong toughness, bend resistance, and moderate support.

[0038] The dimensions of the upper bottom surface of the movable body and the lower bottom surface of the fixed body 31 are the same.

[0039] A certain gap is left between the metal pipe 30 and the connecting ring 29, which ensures that the movement range of the end of the metal pipe 30 is controlled by the pushing component 28, and also allows it to be finely adjusted due to the flexible material of the feeding pipe 26 itself; in addition, the flared pipe ensures accurate insertion into the receiving pipe 34. The push block 40 has its inclined surface facing upwards, fitting into the side of the fixed body 31. The fixed body 31 can easily push the push block 40 away, allowing it to seal between the fixed body 31 and the movable body 32. If the metal pipe 30 needs to be removed from the receiving pipe 34, continue pushing downwards. The push block 40 pushes the movable body 32 upwards, compressing the first spring 33 to a certain position. Then, the push block 40 will be offset from the movable body 32 and enter above it. Since the bottom surface of the push block 40 is flat, when the feeding pipe 26 is pulled upwards, the push block 40 will be gradually compressed, while simultaneously pushing the movable body 32 downwards until it abuts against the fixed body 31 (the weight of the movable body 32 plus the pushing force of the push block 40). Then, it quickly slides into the side of the fixed body 31, completing the separation. This process can be adjusted and calibrated according to the weight of the movable body 32, the fixed body 31, and the spring force. If the above process can be completed, it is possible to determine what kind of fixed body 31, movable body 32, and first spring 33 should be manufactured and selected.

[0040] Example 2: Unlike Example 1, a low-temperature environment rapidly curing polymer grouting material is composed of a mixture of component A and component B. The content of each component by weight is as follows: Component A: 100 parts of polymethylene polyphenyl polyisocyanate; Component B: 35 parts of polyether polyol A, 15 parts of polyester polyol B, 5 parts of Mannich base, 10 parts of flame retardant, 1.5 parts of foaming catalyst, 0.5 parts of gel catalyst, 0.5 parts of surfactant, 5 parts of physical foaming agent, 1.0 part of chemical foaming agent, and 5 parts of plasticizer.

[0041] Temperature: -5℃; gelation time: 120~150s; foaming ratio: 4.5~5.5; performance: good curing, uniform foam, and moderate elasticity.

[0042] Example 3: Unlike Example 1, a low-temperature environment rapidly curing polymer grouting material is composed of a mixture of component A and component B. The content of each component by weight is as follows: Component A: 100 parts of polymethylene polyphenyl polyisocyanate; Component B: 35 parts of polyether polyol A, 15 parts of polyester polyol B, 15 parts of Mannich base, 10 parts of flame retardant, 1.5 parts of foaming catalyst, 0.5 parts of gel catalyst, 0.5 parts of surfactant, 5 parts of physical foaming agent, 1.0 part of chemical foaming agent, and 5 parts of plasticizer.

[0043] Temperature: -5℃; gelation time: 40~55s; foaming ratio: 4.0~5.0; performance: fast reaction, slightly brittle foam, strong adhesion.

[0044] Example 4: Unlike Example 1, a low-temperature environment rapidly curing polymer grouting material is composed of a mixture of component A and component B. The content of each component by weight is as follows: Component A: 100 parts of polymethylene polyphenyl polyisocyanate; Component B: 35 parts of polyether polyol A, 15 parts of polyester polyol B, 0 parts of Mannich base, 10 parts of flame retardant, 1.5 parts of foaming catalyst, 0.5 parts of gel catalyst, 0.5 parts of surfactant, 5 parts of physical foaming agent, 1.0 part of chemical foaming agent, and 5 parts of plasticizer.

[0045] Temperature: -5℃, gel time: >300s, foaming ratio: 1.5~2.0; characteristics: strong fluidity, extremely slow curing, sticky surface.

[0046] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A polymer grouting material that cures rapidly in a low-temperature environment, characterized in that: It is composed of a mixture of component A and component B, and the content of each component by weight is as follows: Component A: 100 parts of polymethylene polyphenyl polyisocyanate; Component B: 35 parts of polyether polyol A, 15 parts of polyester polyol B, 5-15 parts of Mannich base, 10 parts of flame retardant, 1.5 parts of foaming catalyst, 0.5 parts of gel catalyst, 0.5 parts of surfactant, 5 parts of physical foaming agent, 1.0 part of chemical foaming agent, and 5 parts of plasticizer.

2. The low-temperature environment rapid curing polymer grouting material according to claim 1, characterized in that: The polymethylene polyphenyl polyisocyanate is crude MDI, the polyether polyol A is ZS-4110, the polyester polyol B is PS-3152, the flame retardant is triethyl phosphate, the foaming catalyst is triethylenediamine solution, the gel catalyst is dibutyltin dilaurate, the surfactant is L6950, the physical foaming agent is HCFC-141b, the chemical foaming agent is deionized water, and the plasticizer is DOP.

3. The preparation method of a low-temperature environment rapidly curing polymer grouting material according to claim 1 or 2, characterized in that, Includes the following steps: Prepare the raw materials for component A and component B separately, and perform pretreatment. Preparation of component A: Crude MDI is added to the component A reaction vessel, the vacuum system is turned on to make the vacuum degree ≤ -0.095MPa, the heating system is turned on to heat the reaction vessel to 60-70℃, and then the mixture is stirred and dehydrated for 1-2 hours; after the reaction is completed, the temperature is lowered to below 40℃, filtered and sent to the finished product storage tank. Preparation of Component B: Add polyether polyol A (35 parts) and polyester polyol B (15 parts) to the Component B reactor; use the connector disconnection structure to disconnect the raw material pipeline from the Component B reactor, then turn on the stirring unit, vacuum system and swing structure, heat to 100-120℃, and dehydrate for 2-3 hours under vacuum degree ≤-0.095MPa until the moisture content is below 0.05%; when raw materials need to be added, use the swing structure to move the Component B reactor to the initial position, then use the connector disconnection structure to connect the raw materials to the Component B reactor, and then disconnect the feeding pipeline from the Component B reactor; After dehydration is complete, stop the oscillating structure to stop the B component reactor, turn off the heating, turn on the cooling water to cool the material to below 40°C, and slowly add 10 parts of Mannich base through a metering pump under nitrogen protection. Then turn on the stirring unit and oscillating structure again and stir for 30 minutes until uniform. Keep stirring, then add 10 parts of flame retardant and 5 parts of plasticizer in sequence, and stir for 20-30 minutes; Add 0.5 parts of surfactant, 1.5 parts of triethylenediamine catalyst, and 0.5 parts of dibutyltin dilaurate; Check the temperature inside the reactor to ensure it is below 30°C; first add 1.0 part of chemical foaming agent and stir quickly for 5 minutes; then slowly add 5 parts of physical foaming agent and continue stirring for 10 minutes. During this stage, maintain a slight positive pressure or normal pressure inside the reactor to prevent the foaming agent from evaporating. After all materials are added, turn on the vacuum system and stir under negative pressure for 20 to 30 minutes to remove air bubbles introduced during the mixing process; After the vacuum is broken, the material is fed into the B component finished product storage tank through the discharge unit and filtered at the same time.

4. The apparatus used in the preparation method according to claim 3, characterized in that: This includes a component A preparation system and a component B preparation system installed on the foundation pier (1); The A-component preparation system includes at least one A-component storage unit (2) for storing raw materials, an A-component reaction vessel (3) for reacting raw materials, an A-component finished product storage tank (4) for receiving finished products, a first discharge unit (301) for connecting the A-component storage unit (2) and the A-component reaction vessel (3), and a first feeding unit (5) for connecting the A-component reaction vessel (3) and the A-component finished product storage tank (4). The component B preparation system includes: The first storage unit (9) of component B includes at least one storage tank and is disposed on the foundation pier (1). The second storage unit (12) of component B is disposed on the foundation pier (1) and includes at least one storage tank. The B-component reactor (14) is used to provide a space for raw material reaction. The B-component reactor (14) is equipped with a stirring unit and several receiving pipes (34). The receiving pipes (34) are equipped with valves (36). Component B finished product storage tank (11); The second discharge unit is used to connect the B component finished product storage tank (11) and the B component reaction vessel (14); Several sets of second feeding units, each feeding unit includes a feeding pipe (26), one end of which is connected to the first storage unit (9) of component B and the second storage unit (12) of component B, and the other end is detachably connected to the receiving pipe (34) of the reactor (14) of component B. The swing structure is configured to allow the B-component reactor (14) to swing left and right while rotating; The interface disconnection structure is configured to disconnect the feed pipe (26) from the receiving pipe (34) when it is not necessary to add raw materials to the B component reactor (14).

5. The device according to claim 4, characterized in that: The swing structure includes: A ring frame (10) is provided with a base block fixed at its bottom. The base block is fixed on the foundation pier (1). Fixing frames (13) are fixedly installed on the left and right sides of the ring frame (10). The fixing frames (13) are fixedly connected to the foundation pier (1) by bolts. Two sets of stabilizing mechanisms are respectively set at the top and bottom of the B-component reactor (14) and connected to the B-component reactor (14) and the ring frame (10). Two sets of swinging mechanisms are respectively set on the left and right sides of the B-component reactor (14) and connected to the B-component reactor (14) and the ring frame (10). At least one motor (44), the output end of which is connected to the swing mechanism; The support frame (43) is fixed on the foundation pier (1), and the motor (44) is fixed on the support frame (43).

6. The device according to claim 5, characterized in that: The stabilizing mechanism includes: Support member (16), which is fixedly connected to the B component reactor (14) and is set at intervals; A connecting body (17) is rotatably connected to a support member (16) at one end and has a groove at the other end. A roller (18) is provided in the groove. A sliding shaft (19) is passed through the connecting body (17) and the roller (18) in the front-back direction. The two ends of the sliding shaft (19) extend beyond the front and rear end faces of the connecting body (17) respectively. The sliding shaft (19) is rotatably connected to the connecting body (17) and the roller (18). The first limiting groove (20) is opened on the inner side wall of the ring frame (10), and the roller (18) rolls in cooperation with the bottom of the first limiting groove (20). The second limiting groove (21) is formed by the inner wall of the first limiting groove (20) being recessed forward and backward respectively, and the two ends of the sliding shaft (19) are respectively in rolling cooperation with the inner wall of the second limiting groove (21).

7. The device according to claim 6, characterized in that: The swing mechanism includes: The drive shaft (22) passes through the inside of the ring frame (10) in the left-right direction, and the drive shaft (22) is connected to the motor (44) in a drive connection. The push plate (23) is located inside the ring frame (10). The push plate (23) includes a first plate (2301) fixedly connected to the drive shaft (22) in the front-back direction, and a second plate (2302) integrally formed with the first plate (2301). The surface of the second plate (2302) is intersected with the surface of the first plate (2301). The second plate (2302) is connected to a pusher (24), which is connected to the B-component reactor (14). The two pushers (24) are located on the same straight line. The line connecting the two pushers (24) intersects the line connecting the two connecting bodies (17).

8. The device according to claim 4, characterized in that: The interface disconnection structure includes: Mounting bracket (8), which is fixed to the foundation pier (1) and / or the swing structure; A limiting sleeve (27) is fixedly connected to the mounting frame (8), and the feeding pipe (26) passes through the limiting sleeve (27); A pushing component (28) is fixedly connected to a mounting frame (8) and includes a fixed end and a movable end, wherein the fixed end is fixedly connected to the mounting frame (8) and the movable end is fixedly connected to the feeding pipe (26); A metal pipe (30) is fixedly connected to the end of a feeding pipe (26). A frustum-shaped fixed body (31) is fixedly fitted on the outside of the metal pipe (30). A frustum-shaped movable body (32) is movably fitted on the outside of the metal pipe (30). A first spring (33) is fitted on the outside of the metal pipe (30). One end of the first spring (33) is fixedly connected to the metal pipe (30), and the other end is fixedly connected to the movable body (32), so that the movable body (32) can move along the metal pipe (30). Two limiting holes (37) are located on the same straight line. The limiting holes (37) are located above the valve (36) and are spaced apart. The two limiting holes (37) are respectively opened radially outward from the inner wall of the receiving pipe (34). A movable rod (38) is slidably installed in each of the two limiting holes (37). A second spring (39) is sleeved on the outside of the movable rod (38). One end of the second spring (39) near the outer wall of the receiving pipe (34) is fixedly connected to the limiting hole (37), and the other end is fixedly connected to the movable rod (38). Push block (40), the push block (40) is fixedly installed at one end of the movable rod (38) near the inner wall of the receiving pipe (34), the vertical cross section of the push block (40) is a right trapezoid, and the upper base dimension is smaller than the lower base dimension; The arc-shaped piece (42) is semi-circular with a central angle of 180°. The arc-shaped piece (42) is fixed to the bottom of the push block (40), and the horizontal direction of the contact point with the push block (40) does not exceed the end of the push block (40). The third limiting groove (41) is used to accommodate the arc-shaped piece (42), and the third limiting groove (41) is opened horizontally along the radial direction from the inner side wall of the receiving pipe (34).

9. The device according to claim 8, characterized in that: The bottom surface of the fixed body (31) is smaller than the top surface, and the bottom surface of the movable body (32) is larger than the top surface. When the metal pipe (30) is inserted into the receiving pipe (34), the top surface of the fixed body (31) abuts against the lower surfaces of the two arc-shaped pieces (42), and the top surface of the fixed body (31) is provided with an annular sealing ring.

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