Double slurry mixing device for tunnel shield grouting
Patent Information
- Application Number
- CN202522064937.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-23
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-09-23
AI Technical Summary
[0003]本实用新型的主要目的是提出一种用于隧道盾构注浆的双浆液混合装置，旨在解决现有技术中双浆液混合装置的混合效果较差且容易堵塞的技术问题
[0014]本实用新型提出的用于隧道盾构注浆的双浆液混合装置，输送水玻璃浆的第二管道伸入运输水泥浆的第一管道内，水玻璃浆在雾化喷射头的作用下雾化并喷射至第一管道内，水玻璃浆以雾化状态与水泥浆同向汇合，显著增大水玻璃浆与水泥浆的接触面积，保证水玻璃浆与水泥浆的充分混合，雾化后的水玻璃浆能够有效减小汇合时对水泥浆带来的能量损失，从而保证第一管道中双浆液的流速稳定。水玻璃浆和水泥浆汇合后共同流向混合器，并在混合器内形成局部涡流，使水玻璃浆和水泥浆进一步充分混合，形成均匀混合的双浆液，便于后续隧道盾构施工过程中的连续注浆，并能避免传统装置因层流分隔导致的局部凝固堵塞现象，有效提高双浆液的混合效率和混合效果，显著提高隧道盾构施工的连续性。
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Figure CN224827062U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tunnel engineering technology, and in particular to a dual-slurry mixing device for tunnel shield grouting. Background Technology
[0002] When tunneling with shields in soft soil, water-rich, or highly permeable strata, a cement-water glass dual-liquid grout needs to be injected into the gap between the tunnel face and the shield tail to rapidly build early strength and seal groundwater. Before grouting, the cement grout and water glass grout need to be uniformly mixed according to a preset ratio. Existing dual-grout mixing devices typically use a dual-pipe "Y"-shaped confluence structure. After the cement grout and water glass grout merge in the mixing device, they rely on the grout flow rate to achieve mixing. Due to the significant difference in density and viscosity between the cement grout and water glass grout, laminar flow separation is easily formed at the confluence interface, resulting in insufficient contact and uneven mixing of the cement grout and water glass grout, poor mixing effect, and the tendency for local solidification to form in the pipes, causing periodic blockages and interrupting tunnel shield construction. Utility Model Content
[0003] The main purpose of this invention is to propose a dual-slurry mixing device for tunnel shield grouting, which aims to solve the technical problems of poor mixing effect and easy clogging in the existing dual-slurry mixing devices.
[0004] To achieve the above objectives, the present invention proposes a dual-slurry mixing device for tunnel shield grouting, comprising a first pipe, a second pipe, an atomizing nozzle, and a mixer. The first pipe is used to transport cement slurry, with a first inlet and a first outlet formed at opposite ends. A connection port is provided on the pipe wall of the first pipe, located between the first inlet and the first outlet. The second pipe is used to transport water glass slurry, with a second inlet and a second outlet formed at opposite ends. The second pipe passes through the connection port, and the second outlet extends into the first pipe, facing the first outlet. The atomizing nozzle is located at the second outlet and is used to atomize the water glass slurry in the second pipe and spray it into the first pipe. The mixer is located inside the first pipe between the connection port and the first outlet and is used to mix the cement slurry and the water glass slurry.
[0005] In one embodiment, the second pipe includes a straight pipe section, a first bend pipe section, and a second bend pipe section. The straight pipe section connects the first bend pipe section and the second bend pipe section. The second inlet and the second outlet are located in the first bend pipe section and the second bend pipe section, respectively. The straight pipe section passes through the connection port. The first bend pipe section and the second bend pipe section are in opposite directions. The second bend pipe section bends from the straight pipe section toward the first outlet.
[0006] In one embodiment, the first bend section is threadedly connected to the straight section, and the second bend section is threadedly connected to the straight section.
[0007] In one embodiment, the mixer includes blades that are helical or streamlined and are arranged at an angle to the axis of the first pipe.
[0008] In one embodiment, the angle between the blade and the axis of the first pipe is A, wherein 30°≤A≤60°.
[0009] In one embodiment, the spray direction of the atomizing nozzle is set at an angle to the axis of the first pipe, and the angle between the spray direction of the atomizing nozzle and the axis of the first pipe is B, wherein 30°≤B≤60°.
[0010] In one embodiment, a claw-type connector is provided at the first outlet. The claw-type connector includes a snap ring and a plurality of claws. The snap ring is sleeved on the outside of the first pipe, and each of the claws is hinged to the snap ring. The plurality of claws are distributed at intervals along the circumference of the snap ring.
[0011] In one embodiment, the two opposite ends of the claw are a snap-fit end and a hinge end, respectively. The hinge end is hinged to the snap ring. The claw can rotate relative to the hinge end in a direction closer to or away from the first pipe, and the snap-fit end bends in a direction closer to the first pipe.
[0012] In one embodiment, the first outlet is equipped with an expansion ring, and an annular groove is formed at the end of the expansion ring opposite to the first pipe, and a rubber gasket is installed in the groove.
[0013] In one embodiment, a handle is installed on the outer wall of the first pipe.
[0014] This invention proposes a dual-slurry mixing device for tunnel shield grouting. A second pipe for transporting water glass slurry extends into a first pipe for transporting cement slurry. The water glass slurry is atomized by an atomizing nozzle and sprayed into the first pipe. The atomized water glass slurry merges with the cement slurry in the same direction, significantly increasing the contact area between the two slurries and ensuring thorough mixing. The atomized water glass slurry effectively reduces energy loss to the cement slurry during merging, thus ensuring a stable flow rate of the dual slurries in the first pipe. After merging, the water glass slurry and cement slurry flow together to the mixer, forming a localized vortex within the mixer. This further promotes thorough mixing, resulting in a uniformly mixed dual slurry. This facilitates continuous grouting during subsequent tunnel shield construction and avoids the localized solidification and blockage caused by laminar flow separation in traditional devices. It effectively improves the mixing efficiency and effect of the dual slurries, significantly enhancing the continuity of tunnel shield construction. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0016] Figure 1 A top view schematic diagram of an embodiment of the dual-slurry mixing device for tunnel shield grouting provided by this utility model;
[0017] Figure 2 This is a partial structural schematic diagram of an embodiment of the dual-slurry mixing device for tunnel shield grouting provided by this utility model.
[0018] Explanation of icon numbers:
[0019] 10. First pipe; 11. First inlet; 12. First outlet; 13. Connection port; 20. Second pipe; 21. Second inlet; 22. Second outlet; 23. Straight pipe section; 24. First bend pipe section; 25. Second bend pipe section; 30. Atomizing nozzle; 40. Mixer; 51. Snap ring; 52. Claw; 60. Expansion ring; 61. Rubber gasket; 70. Handle.
[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0022] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0023] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0024] Existing dual-slurry mixing devices typically employ a dual-pipe "Y"-shaped confluence structure. After cement slurry and water glass slurry merge within the mixing device, they rely on the slurry flow rate to achieve mixing. Due to the significant differences in density and viscosity between cement slurry and water glass slurry, laminar flow separation is easily formed at the confluence interface, resulting in insufficient contact and uneven mixing of cement slurry and water glass slurry, leading to poor mixing effect. Furthermore, local solidification is prone to occur within the pipes, causing periodic blockages and interrupting tunnel shield construction.
[0025] This utility model proposes a dual-slurry mixing device for tunnel shield grouting, comprising a first pipe 10, a second pipe 20, an atomizing nozzle 30, and a mixer 40. The first pipe 10 is used to transport cement slurry, and its opposite ends form a first inlet 11 and a first outlet 12, respectively. A connection port 13 is provided on the pipe wall of the first pipe 10, located between the first inlet 11 and the first outlet 12. The second pipe 20 is used to transport water glass slurry, and its opposite ends form a second inlet 21 and a second outlet 22, respectively. The second pipe 20 passes through the connection port 13, and the second outlet 22 extends into the first pipe 10, with the second outlet 22 facing the first outlet 12. The atomizing nozzle 30 is located at the second outlet 22 and is used to atomize the water glass slurry in the second pipe 20 and spray it into the first pipe 10. The mixer 40 is located in the first pipe 10 and between the connection port 13 and the first outlet 12, and is used to mix the cement slurry and the water glass slurry.
[0026] Please see Figure 1 Cement slurry enters the first pipe 10 through the first inlet 11 and flows towards the first outlet 12. The second pipe 20 is inserted into the first pipe 10 through a connection port 13 on its side wall, with the second inlet 21 of the second pipe 20 located outside the first pipe 10 and the second outlet 22 located inside. Water glass slurry enters the second pipe 20 through the second inlet 21 and flows towards the second outlet 22. Under the spraying of the atomizing nozzle 30, it is sprayed from the second outlet 22 into the first pipe 10, merging with the cement slurry already inside. The second outlet 22 is positioned facing the first outlet 12, ensuring that the flow direction of the water glass slurry from the atomizing nozzle 30 is consistent with the flow direction of the cement slurry, thereby reducing energy loss during the water glass slurry's flow. After entering the first pipe 10, the water glass slurry and cement slurry flow together to the mixer 40, where they are further mixed to form a uniformly mixed dual slurry, which finally flows out of the dual slurry mixing device from the first outlet 12.
[0027] This invention proposes a dual-slurry mixing device for tunnel shield grouting. A second pipe 20 for transporting water glass slurry extends into a first pipe 10 for transporting cement slurry. The water glass slurry is atomized by an atomizing nozzle 30 and sprayed into the first pipe 10. The atomized water glass slurry merges with the cement slurry in the same direction, significantly increasing the contact area between the two slurries and ensuring thorough mixing. The atomized water glass slurry effectively reduces energy loss to the cement slurry during merging, thus ensuring a stable flow rate of the dual slurries in the first pipe 10. After merging, the water glass slurry and cement slurry flow together into a mixer 40, forming a local vortex within the mixer 40. This further promotes thorough mixing of the water glass slurry and cement slurry, forming a uniformly mixed dual slurry. This facilitates continuous grouting during subsequent tunnel shield construction and avoids the localized solidification and blockage caused by laminar flow separation in traditional mixing devices. This effectively improves the mixing efficiency and effect of the dual slurries, significantly enhancing the continuity of tunnel shield construction.
[0028] In one embodiment, the second pipe 20 includes a straight pipe section 23, a first bend pipe section 24, and a second bend pipe section 25. The straight pipe section 23 is connected between the first bend pipe section 24 and the second bend pipe section 25. The second inlet 21 and the second outlet 22 are located in the first bend pipe section 24 and the second bend pipe section 25, respectively. The straight pipe section 23 passes through the connection port 13. The first bend pipe section 24 and the second bend pipe section 25 are in opposite directions. The second bend pipe section 25 bends from the straight pipe section 23 toward the first outlet 12.
[0029] Please see Figure 2 The first bend section 24 and the second bend section 25 are in opposite directions, and the second bend section 25 bends from the straight section 23 toward the first outlet 12, making the layout of the second pipe 20 within the first pipe 10 more reasonable. Water glass slurry flows into the first bend section 24 from the second inlet 21, then enters the second bend section 25 via the straight section 23, and is ejected from the second outlet 22. Because the second bend section 25 bends toward the first outlet 12, the spraying direction of the water glass slurry is consistent with the flow direction of the cement slurry, further reducing the energy loss from collisions between the water glass slurry and the cement slurry during spraying and improving mixing efficiency.
[0030] In one embodiment, the first bend section 24 is threadedly connected to the straight section 23, and the second bend section 25 is threadedly connected to the straight section 23.
[0031] It should be noted that the first bend section 24 is located outside the first pipe 10, the second bend section 25 is located inside the first pipe 10, and the straight pipe section 23 passes through the connection port 13. The first bend section 24 and the second bend section 25 are respectively threaded to both ends of the straight pipe section 23, enabling a detachable connection between the first bend section 24 and the second bend section 25 and the straight pipe section 23. When installing the second pipe 20, the straight pipe section 23 can be inserted into the connection port 13 first, then the first bend section 24 can be connected to the straight pipe section 23 from outside the first pipe 10, and the second bend section 25 can be connected to the straight pipe section 23 from inside the first pipe 10, effectively improving the convenience of assembling and disassembling the second pipe 20.
[0032] In one embodiment, the mixer 40 includes blades that are spiral or streamlined and are arranged at an angle to the axis of the first conduit 10.
[0033] It can be explained that the blades extend in a spiral or streamlined shape, and the axis of the blades is set at an angle to the axis of the first pipe 10. After the cement slurry and water glass slurry merge, they can generate a rotating flow under the guidance of the blades, thereby breaking the laminar flow state of the two slurries and promoting further mixing of the cement slurry and water glass slurry. The angle between the axis of the blades and the axis of the first pipe 10 further enhances the vortex degree of the two slurries, thereby further improving the mixing effect of the two slurries.
[0034] In one embodiment, the included angle between the blade and the axis of the first pipe 10 is A, wherein 30°≤A≤60°.
[0035] Specifically, the angle between the axis of the blade and the axis of the first pipe 10 is 30° to 60°, so that the two slurries form a reasonable vortex in the mixer 40 under the guidance of the blade, ensuring the mixing effect of the two slurries, while avoiding excessive resistance from the blade to the two slurries, which would lead to excessive energy loss of the two slurries and affect the flow rate of the two slurries.
[0036] In one embodiment, the spray direction of the atomizing nozzle 30 is set at an angle to the axis of the first pipe 10, and the angle between the spray direction of the atomizing nozzle 30 and the axis of the first pipe 10 is B, wherein 30°≤B≤60°.
[0037] It should be noted that the spray direction of the atomizing nozzle 30 is the same as the spray direction of the water glass slurry, and the axial direction of the first pipe 10 is the same as the flow direction of the cement slurry. The spray direction of the water glass slurry and the flow direction of the cement slurry converge at an angle of 30° to 60°, which ensures the mixing effect of the water glass slurry and the cement slurry while avoiding excessive energy loss of the cement slurry by the water glass slurry, and ensuring the smooth flow of the two slurries.
[0038] In one embodiment, a claw 52 type connector is provided at the first outlet 12. The claw 52 type connector includes a snap ring 51 and multiple claws 52. The snap ring 51 is sleeved on the outside of the first pipe 10, and each claw 52 is hinged to the snap ring 51. The multiple claws 52 are distributed at intervals along the circumference of the snap ring 51.
[0039] It can be explained that the first outlet 12 is connected to the external grouting equipment. By setting a claw 52 type connector at the first outlet 12, the multiple claws 52 of the claw 52 type connector can engage with the grouting equipment to securely connect the dual grout mixing device to the grouting equipment. The snap ring 51 is sleeved on the outside of the first pipe 10, and the multiple claws 52 are distributed circumferentially along the snap ring 51, so that the claws 52 can apply a uniform clamping force during the clamping process, thereby avoiding loosening or leakage caused by uneven force.
[0040] In one embodiment, the two opposite ends of the claw 52 are a snap-fit end and a hinge end, respectively. The hinge end is hinged to the snap ring 51. The claw 52 can rotate relative to the hinge end in a direction closer to or away from the first pipe 10, and the snap-fit end bends in a direction closer to the first pipe 10.
[0041] Furthermore, the snap ring 51 is sleeved on the outside of the first pipe 10, and the claw 52 is hinged to the snap ring 51 and extends to the outside of the first outlet 12 in a direction away from the first inlet 11. When the first outlet 12 is connected to the grouting equipment, the claw 52 can rotate relative to the hinged end, so that the snap end rotates towards the first pipe 10 and bends towards the first pipe 10, so that the snap end can snap into the pipe wall of the grouting equipment. Similarly, the claw 52 can rotate relative to the hinged end in a direction away from the first pipe 10, so that the snap end gradually moves away from the first pipe 10, thereby disengaging the snap end from the grouting equipment.
[0042] In one embodiment, the first outlet 12 is equipped with an expansion ring 60, and an annular groove is provided at the end of the expansion ring away from the first pipe 10, and a rubber gasket 61 is installed in the groove.
[0043] Understandably, the expansion ring 60 is installed at the first outlet 12. The expansion ring 60 provides an extended connection platform for the pipe connection, facilitating connection with external grouting equipment. An annular groove is formed at the end of the expansion ring 60 facing away from the first pipe 10, providing precise positioning and fixing space for the rubber gasket 61. The rubber gasket 61 is installed within the groove to fill the tiny gaps in the connection, preventing grout leakage at the connection point. It also provides a certain degree of elastic cushioning, effectively absorbing vibrations generated during pipeline system operation, reducing the impact of vibrations on the connection point, and extending the service life of the pipeline system.
[0044] In one embodiment, a handle 70 is mounted on the outer wall of the first pipe 10.
[0045] It can be explained that the handle 70 is installed on the outer wall of the first pipe 10, which makes it easy for the operator to hold the pipe when connecting, installing or maintaining the pipe, providing the operator with a stable grip point, making it more convenient and safer to handle, adjust or install the first pipe 10.
[0046] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.
Claims
1. A dual-slurry mixing device for tunnel shield grouting, characterized in that, include: A first pipe is used to transport cement slurry. A first inlet and a first outlet are formed at opposite ends of the first pipe. A connection port is provided on the pipe wall of the first pipe, and the connection port is located between the first inlet and the first outlet. The second pipe is used to transport water glass slurry. The two opposite ends of the second pipe form a second inlet and a second outlet, respectively. The second pipe passes through the connection port, and the second outlet extends into the first pipe and is oriented towards the first outlet. An atomizing nozzle is provided at the second outlet and is used to atomize the water glass slurry in the second pipe and spray it into the first pipe. A mixer is disposed within the first pipe and located between the connection port and the first outlet, the mixer being used to mix the cement slurry and the water glass slurry.
2. The dual-slurry mixing device for tunnel shield grouting as described in claim 1, characterized in that, The second pipe includes a straight pipe section, a first bend pipe section, and a second bend pipe section. The straight pipe section connects the first bend pipe section and the second bend pipe section. The second inlet and the second outlet are located in the first bend pipe section and the second bend pipe section, respectively. The straight pipe section passes through the connection port. The first bend pipe section and the second bend pipe section are in opposite directions. The second bend pipe section bends from the straight pipe section toward the first outlet.
3. The dual-slurry mixing device for tunnel shield grouting as described in claim 2, characterized in that, The first bend section is threadedly connected to the straight section, and the second bend section is threadedly connected to the straight section.
4. The dual-slurry mixing device for tunnel shield grouting as described in claim 1, characterized in that, The mixer includes blades that are spiral or streamlined and are arranged at an angle to the axis of the first pipe.
5. The dual-slurry mixing device for tunnel shield grouting as described in claim 4, characterized in that, The angle between the blade and the axis of the first pipe is A, where 30°≤A≤60°.
6. The dual-slurry mixing device for tunnel shield grouting as described in any one of claims 1 to 5, characterized in that, The spray direction of the atomizing nozzle is set at an angle to the axis of the first pipe, and the angle between the spray direction of the atomizing nozzle and the axis of the first pipe is B, wherein 30°≤B≤60°.
7. The dual-slurry mixing device for tunnel shield grouting as described in any one of claims 1 to 5, characterized in that, A claw-type connector is provided at the first outlet. The claw-type connector includes a snap ring and multiple claws. The snap ring is sleeved on the outside of the first pipe, and each of the claws is hinged to the snap ring. The multiple claws are distributed at intervals along the circumference of the snap ring.
8. The dual-slurry mixing device for tunnel shield grouting as described in claim 7, characterized in that, The two ends of the claw are a snap-fit end and a hinge end, respectively. The hinge end is hinged to the buckle ring. The claw can rotate relative to the hinge end in a direction closer to or away from the first pipe, and the snap-fit end bends in a direction closer to the first pipe.
9. The dual-slurry mixing device for tunnel shield grouting as described in any one of claims 1 to 5, characterized in that, The first outlet is equipped with an expansion ring, and an annular groove is provided at the end of the expansion ring opposite to the first pipe, and a rubber gasket is installed in the groove.
10. The dual-slurry mixing device for tunnel shield grouting as described in any one of claims 1 to 5, characterized in that, A handle is installed on the outer wall of the first pipe.