Pipe jacking construction anti-drag slurry preparation device

Abstract

The invention belongs to the technical field of anti-drag slurry preparation, and particularly relates to a pipe jacking construction anti-drag slurry preparation device which comprises a heating preparation kettle, a feeding assembly is installed above a top cover, and the feeding assembly comprises a vertical cylinder installed above the top cover and an inverted-cone-shaped cylinder fixedly installed above the vertical cylinder; a weighing cylinder is fixedly installed above the inverted-cone-shaped cylinder, a feeding cylinder is fixedly installed above the weighing cylinder, a feeding port is fixedly installed above the feeding cylinder, ingredients are weighed through the overturning weighing assembly, the proportion of all the ingredients of the anti-drag slurry is accurate, the quality of the anti-drag slurry formed through stirring is better, and when the anti-drag slurry is applied to pipe jacking construction subsequently, the stirring efficiency is improved. The pipe jacking construction can be more efficient, after the properties of different soil layers are deeply analyzed, composition ingredients of bentonite, water, a thickening agent, a drag reducer and a stabilizer are adopted, the ingredients form drag reduction slurry, and an effective slurry sleeve can be formed in a special soil layer.

Description

Technical Field

[0001] The invention belongs to the field of drag-reducing mud preparation, in particular to a device for preparing drag-reducing mud for pipe jacking construction. Background Art

[0002] In pipe jacking construction, grouting to reduce drag is a key link to ensure the success of the project. By reducing the frictional resistance between the pipe and the soil through the grouting process, the jacking distance can be greatly increased, thereby realizing large-diameter and long-distance jacking construction. The drag-reducing mud is filled between the pipe shell and the soil, which can significantly reduce the frictional resistance of the pipe section advancement. Especially in soils such as sub-clay and sandy soil, the drag reduction effect is particularly important.

[0003] A patent document with publication number CN108102619A discloses a drag-reducing mud and its preparation and use methods. The drag-reducing mud includes bentonite, alkaline inorganic matter, polyacrylamide and water; in terms of mass ratio, bentonite: alkaline inorganic matter: polyacrylamide, and the alkaline inorganic matter is sodium carbonate and / or sodium hydroxide. The jacking pipe drag-reducing mud of the present invention has excellent water retention performance, complete set performance, support performance, and durability performance. It can be used for jacking pipes and shields, especially for situations with large jacking forces. The frequency of grouting is greatly reduced during use, and a mud sleeve can be effectively formed during jacking, which greatly reduces the frictional resistance of the outer wall of the pipeline, reduces the jacking force, reduces the cutter head torque and working current, and reduces the loss of the jacking equipment.

[0004] In the traditional technical solution, the drag reducing mud is formed by mixing and stirring the components of the drag reducing mud. However, this mud lacks specificity, and the properties of different soil layers are not deeply analyzed, and the proportion of the mud ingredients is not confirmed, resulting in the inability to form an effective mud jacket in special soil layers, thus affecting the drag reduction effect.

[0005] To this end, the present invention provides a device for preparing drag-reducing mud for pipe jacking construction. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: a device for preparing drag-reducing mud for pipe jacking construction described in the present invention comprises a heating preparation kettle, a water inlet pipe is fixedly installed on the side of the heating preparation kettle, a top cover is installed above the heating preparation kettle, a feeding assembly is installed above the top cover, the feeding assembly comprises a vertical cylinder installed above the top cover and an inverted cone cylinder fixedly installed above the vertical cylinder, a weighing cylinder is fixedly installed above the inverted cone cylinder, a feeding cylinder is fixedly installed above the weighing cylinder, and a feeding port is fixedly installed above the feeding cylinder;

[0008] A driving motor and a stirring paddle connected to the driving motor through a shaft are installed inside the heating preparation kettle, and a flip weighing assembly is movably installed inside the weighing cylinder. The components of the drag reduction mud for pipe jacking construction include bentonite, water, thickener, drag reducer and stabilizer. The flip weighing assembly is used to weigh the bentonite, thickener, drag reducer and stabilizer. The heating preparation kettle is used to heat water, and the heating preparation kettle is also used to stir the bentonite, water, thickener, drag reducer and stabilizer.

[0009] Preferably, a through groove is opened inside the top cover, and a plurality of fixing columns are fixedly installed inside the through groove. The plurality of fixing columns are fixedly connected to the driving motor, and the upper end of the driving motor is installed in an arc shape.

[0010] Preferably, the composition of the drag reducing mud for pipe jacking construction includes 25%-35% bentonite, 50%-70% water, 3%-8% thickener, 2%-5% drag reducer, and 1%-3% stabilizer, the thickener is a cellulose ether thickener, the drag reducer is preferably polyethylene oxide or polyacrylamide, and the stabilizer is an inorganic salt.

[0011] Preferably, the flipping weighing assembly includes a load-bearing plate inside the weighing cylinder and a weighing plate installed below the load-bearing plate, an arc-shaped rubber sheet is fixedly installed between the load-bearing plate and the weighing plate, a fixed motor is fixedly installed on the outside of the weighing cylinder, the connecting shaft of the fixed motor passes through the weighing cylinder and is connected to the weighing plate, and the arc-shaped rubber sheet bulges toward the outside of the flipping weighing assembly.

[0012] Preferably, a rotating motor is fixedly mounted above the load-bearing plate, a rotating head is movably mounted above the rotating motor, and a rotating paddle is fixedly mounted outside the rotating head.

[0013] Preferably, a plurality of connecting columns are installed above the weighing plate, the upper ends of the plurality of connecting columns are fixedly connected to the load-bearing plate, and a weighing sensor is installed inside the weighing plate.

[0014] Preferably, a second annular groove is provided inside the inverted cone-shaped cylinder, an annular water outlet assembly is movably installed inside the second annular groove, and the diameter of the upper end of the inverted cone-shaped cylinder is greater than the diameter of the lower end.

[0015] Preferably, a plurality of U-shaped connectors are installed on the outer side of the weighing cylinder in a detachable installation manner, and the lower ends of the plurality of U-shaped connectors are installed on the outer side of the inverted cone cylinder in a detachable installation manner.

[0016] Preferably, the annular water outlet assembly comprises an annular plate and a plurality of flat water inlet pipes fixedly mounted on the outer side of the annular plate, and an air pipe is fixedly mounted on the outer side of the annular plate.

[0017] Preferably, an annular groove 1 is opened inside the annular plate, two hollow nets are fixedly installed inside the annular groove 1, a rubber ring is installed between the two hollow nets, the bottom of the rubber ring is connected to the annular groove 1, and the annular groove 1 is connected to the inside of multiple flat water inlet pipes.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The device for preparing drag-reducing mud for pipe jacking construction described in the present invention makes bentonite poured into an inverted cone cylinder, a vertical cylinder and even the last heating preparation kettle by weighing the bentonite by an inverted weighing assembly, and then inverting the inverted weighing assembly, so that the bentonite is poured into an inverted cone cylinder, a vertical cylinder and even the last heating preparation kettle. The inverted cone setting of the inverted cone cylinder allows the ingredients entering the inverted cone cylinder to fall as quickly as possible, at which time the bentonite contacts the heated water in the heating preparation kettle and is continuously stirred by a stirring paddle until the bentonite is completely dissolved in the water, and then a thickener, a drag reducer and a stabilizer are added in sequence, and each addition requires sufficient stirring to ensure that the components are evenly mixed, so as to accurately determine the proportion of the various ingredients of the drag-reducing mud and to improve the quality of the drag-reducing mud stirred and formed. When it is subsequently used in pipe jacking construction, the pipe jacking construction can be made more efficient. After an in-depth analysis of the properties of different soil layers, the ingredients composed of bentonite, water, a thickener, a drag reducer and a stabilizer are used, and these ingredients form the drag-reducing mud, which can form an effective mud sleeve in a special soil layer.

[0020] 2. The device for preparing drag-reducing mud for pipe jacking construction described in the present invention can stir the raw materials in the heating preparation kettle by means of a stirring paddle located inside the heating preparation kettle. The arc setting at the upper end of the driving motor can allow the ingredients poured from the vertical cylinder to fall into the through groove and the heating preparation kettle as much as possible. The amount of bentonite used is 25%-35% to provide better mud consistency and stability. The thickener is selected from cellulose ether thickeners, such as hydroxyethyl cellulose or hydroxypropyl methyl cellulose, to increase the viscosity and suspension of the mud. The drag reducer is preferably polyethylene oxide or polyacrylamide to effectively reduce the friction coefficient between the mud and the soil layer. The stabilizer can be selected from inorganic salts, such as sodium chloride or sodium sulfate, to enhance the stability of the mud.

[0021] 3. The device for preparing drag-reducing mud for pipe jacking construction described in the present invention has an annular water outlet assembly arranged at two locations of the annular groove, so that water can flow out in an annular shape to flush the inner wall of the higher position of the inverted cone tube. At this time, the water flows along the inner wall of the higher position of the inverted cone tube to the inner wall at the bottom position, so that the adhered ingredients can be brought into the heating preparation kettle. Each time the ingredients are poured, annular water will flow out to clean the inner walls of the inverted cone tube and the vertical tube to avoid the adhesion of the ingredients. The annular water flow is also included in the initial water flow ratio, that is, at the beginning, the heating water injected into the heating preparation kettle will be less than what is needed, and then the precise proportion of water can be achieved by flushing the ingredients again and again. The upper and lower parts of the U-shaped connector can be disassembled, and all the U-shaped connectors can be disassembled to take out the annular water outlet assembly, which can be replaced, repaired, and moved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 It is an overall stereogram of the present invention;

[0024] Figure 2 It is a three-dimensional schematic diagram of the heating preparation kettle in the present invention;

[0025] Figure 3 It is a three-dimensional schematic diagram of the feeding assembly in the present invention;

[0026] Figure 4 It is a three-dimensional schematic diagram of the annular water outlet component and the flip weighing component in the present invention;

[0027] Figure 5 It is a three-dimensional schematic diagram of the flip weighing component in the present invention;

[0028] Figure 6 This is a schematic diagram of the disassembly of the flip weighing component in the present invention;

[0029] Figure 7 It is a three-dimensional schematic diagram of the annular groove 2 in the present invention;

[0030] Figure 8 It is a three-dimensional schematic diagram of the annular water outlet component in the present invention;

[0031] Fig. 9 It is a schematic diagram of a side view of the annular groove in the present invention;

[0032] Fig.10 It is a three-dimensional schematic diagram of the hollow net and the rubber ring in the present invention.

[0033] In the figure: 1. heating preparation kettle; 11. water inlet pipe; 12. top cover; 121. through groove; 122. fixed column; 123. driving motor; 124. stirring paddle; 2. feeding assembly; 3. feeding cylinder; 4. feeding port; 5. inverted cone cylinder; 51. annular groove 2; 6. vertical cylinder; 7. annular water outlet assembly; 71. annular plate; 711. annular groove 1; 712. hollow net; 713. rubber ring; 72. flat water inlet pipe; 73. air pipe; 8. weighing cylinder; 81. fixed motor; 82. U-shaped connector; 9. flip weighing assembly; 91. load-bearing plate; 911. rotating motor; 912. rotating head; 913. rotating paddle; 92. weighing plate; 921. connecting column; 93. arc-shaped rubber sheet. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0035] Embodiment 1

[0036] like Figure 1-4 As shown, a device for preparing drag-reducing mud for pipe jacking construction according to an embodiment of the present invention comprises a heating preparation kettle 1, a water inlet pipe 11 is fixedly installed on the side of the heating preparation kettle 1, a top cover 12 is installed above the heating preparation kettle 1, a feeding assembly 2 is installed above the top cover 12, the feeding assembly 2 comprises a vertical cylinder 6 installed above the top cover 12 and an inverted cone cylinder 5 fixedly installed above the vertical cylinder 6, a weighing cylinder 8 is fixedly installed above the inverted cone cylinder 5, a feeding cylinder 3 is fixedly installed above the weighing cylinder 8, and a feeding port 4 is fixedly installed above the feeding cylinder 3;

[0037] A driving motor 123 and a stirring paddle 124 connected to the driving motor 123 through a shaft are installed inside the heating preparation kettle 1, and a flip weighing assembly 9 is movably installed inside the weighing cylinder 8. The components of the drag reduction mud for jacking construction include bentonite, water, thickener, drag reducer and stabilizer. The flip weighing assembly 9 is used to weigh bentonite, thickener, drag reducer and stabilizer. The heating preparation kettle 1 is used to heat water. The heating preparation kettle 1 is also used to stir bentonite, water, thickener, drag reducer and stabilizer.

[0038] Specifically, when it is necessary to prepare the drag-reducing mud for pipe jacking construction, water is poured into the heating preparation kettle 1 through the water inlet pipe 11, and then the water is heated by the heating mechanism inside the heating preparation kettle 1 until the water is heated to 40-60 degrees Celsius, and then the bentonite is poured into the feeding tube 3 through the feeding port 4. The bentonite will eventually fall to the top of the flip weighing component 9 and be weighed by the flip weighing component 9. After the bentonite is weighed, the flip weighing component 9 is flipped to allow the bentonite to be poured into the inverted cone tube 5, the vertical tube 6 and even the final heating preparation kettle 1. The inverted cone setting of the inverted cone tube 5 allows the ingredients entering the inverted cone tube 5 to fall as quickly as possible. At this time, the bentonite is in contact with the heated water inside the heating preparation kettle 1. The stirring is continued by the stirring paddle 124 until the bentonite is completely dissolved in the water, and then the thickener, drag reducer and stabilizer are added in sequence. After each addition, they need to be fully stirred to ensure that the components are evenly mixed. The thickener, drag reducer and stabilizer are also weighed by the flip weighing component 9. The mixed and stirred mud is cooled to room temperature to obtain high-efficiency drag reducing mud. The proportion of each ingredient of the drag reducing mud is accurately calculated, so that the quality of the stirred drag reducing mud is better. When it is subsequently used in pipe jacking construction, it can make the pipe jacking construction more efficient. After an in-depth analysis of the properties of different soil layers, the ingredients composed of bentonite, water, thickener, drag reducer and stabilizer are used. These ingredients form the drag reducing mud, which can form an effective mud sleeve in special soil layers.

[0039] like Figure 2 As shown, a through slot 121 is provided inside the top cover 12 , and a plurality of fixing columns 122 are fixedly installed inside the through slot 121 . The plurality of fixing columns 122 are fixedly connected to a driving motor 123 , and the upper end of the driving motor 123 is installed in an arc shape.

[0040] The drag reducing mud for pipe jacking construction comprises 25%-35% bentonite, 50%-70% water, 3%-8% thickener, 2%-5% drag reducing agent, and 1%-3% stabilizer. The thickener is a cellulose ether thickener, the drag reducing agent is preferably polyethylene oxide or polyacrylamide, and the stabilizer is an inorganic salt.

[0041] Specifically, the driving motor 123 is fixed at the center position of the top cover 12 by a plurality of fixing columns 122. The stirring paddle 124 arranged below the driving motor 123 is located inside the heating preparation kettle 1 and is used to stir the raw materials inside the heating preparation kettle 1. The arc setting at the upper end of the driving motor 123 allows the ingredients poured from the vertical cylinder 6 to fall into the through groove 121 and the heating preparation kettle 1 as much as possible. The amount of bentonite used is 25%-35% to provide better mud consistency and stability. The thickener is selected from cellulose ether thickeners, such as hydroxyethyl cellulose or hydroxypropyl methylcellulose, to increase the viscosity and suspension of the mud. The drag reducer is preferably polyethylene oxide or polyacrylamide to effectively reduce the friction coefficient between the mud and the soil layer. The stabilizer can be selected from inorganic salts, such as sodium chloride or sodium sulfate, to enhance the stability of the mud.

[0042] like Figure 4-5 As shown, the flip weighing assembly 9 includes a load-bearing plate 91 inside the weighing cylinder 8 and a weighing plate 92 installed below the load-bearing plate 91, an arc-shaped rubber sheet 93 is fixedly installed between the load-bearing plate 91 and the weighing plate 92, a fixed motor 81 is fixedly installed on the outside of the weighing cylinder 8, and the connecting shaft of the fixed motor 81 passes through the weighing cylinder 8 and is connected to the weighing plate 92, the arc-shaped rubber sheet 93 bulges toward the outside of the flip weighing assembly 9, a plurality of connecting columns 921 are installed above the weighing plate 92, and the upper ends of the plurality of connecting columns 921 are fixedly connected to the load-bearing plate 91, and a weighing sensor is installed inside the weighing plate 92.

[0043] Specifically, the ingredients dropped from the feed barrel 3 will accumulate above the load-bearing plate 91. The feed barrel 3 is a lantern-shaped structure, which serves as a guide for the dropped ingredients, allowing the ingredients to fall as much as possible above the load-bearing plate 91. The ingredients above the load-bearing plate 91 will give pressure to the load-bearing plate 91, and this pressure is evenly transmitted to the weighing plate 92 through multiple connecting columns 921. At this time, the weighing sensor inside the weighing plate 92 can weigh the weight of the ingredients at this time. The weighing structure can be broadcasted through voice, and can also be relaxed to a mobile phone electrically connected to it through existing technology to adapt to the precise ratio of the ingredients. The bulging setting of the arc-shaped rubber sheet 93 is to prevent ingredients from entering the position between the load-bearing plate 91 and the weighing plate 92, thereby affecting the weighing of the weighing sensor.

[0044] like Figure 5 As shown, a rotating motor 911 is fixedly installed above the load-bearing plate 91 , a rotating head 912 is movably installed above the rotating motor 911 , and a rotating paddle 913 is fixedly installed outside the rotating head 912 .

[0045] Specifically, after more ingredients are piled up on the load-bearing plate 91, the rotating head 912 and multiple rotating paddles 913 are driven by the rotating motor 911 to rotate, so that the ingredients above the load-bearing plate 91 can be evenly distributed above the load-bearing plate 91, which is convenient for accurate weighing of these ingredients.

[0046] like Figure 7 As shown, an annular groove 51 is provided inside the inverted conical cylinder 5, and an annular water outlet assembly 7 is movably installed inside the annular groove 51. The diameter of the upper end of the inverted conical cylinder 5 is larger than the diameter of the lower end. A plurality of U-shaped connectors 82 are installed on the outer side of the weighing cylinder 8 by a detachable installation method, and the lower ends of the plurality of U-shaped connectors 82 are installed on the outer side of the inverted conical cylinder 5 by a detachable installation method.

[0047] Specifically, because the flipping and pouring of the weighing component 9 will cause some ingredients to adhere to the outside of the inverted cone tube 5, at this time, an annular water outlet component 7 is provided at the annular groove 51, which can allow water to flow out in a circular shape to flush the inner wall of the higher position of the inverted cone tube 5. At this time, the water flows along the inner wall of the higher position of the inverted cone tube 5 to the inner wall at the bottom position, and the adhered ingredients can be brought into the heating preparation kettle 1. Each time the ingredients are poured, water will flow out in a circular shape to clean the inner walls of the inverted cone tube 5 and the vertical tube 6 to avoid ingredient adhesion. The circular water flow is also included in the initial water flow ratio, that is, at the beginning, the heating water injected into the heating preparation kettle 1 will be less than needed, and then the ingredients are flushed again and again to complete the precise proportion of water. The upper and lower parts of the U-shaped connector 82 can be disassembled, and all the U-shaped connectors 82 can be disassembled to take out the annular water outlet component 7, and replace, repair and move it.

[0048] like Figure 8-10 As shown, the annular water outlet assembly 7 includes an annular plate 71 and a plurality of flat water inlet pipes 72 fixedly mounted on the outside of the annular plate 71, an air pipe 73 fixedly mounted on the outside of the annular plate 71, an annular groove 711 is provided inside the annular plate 71, two hollow nets 712 are fixedly mounted inside the annular groove 711, a rubber ring 713 is mounted between the two hollow nets 712, the bottom of the rubber ring 713 is connected to the annular groove 711, and the annular groove 711 is communicated with the inside of the plurality of flat water inlet pipes 72.

[0049] Specifically, when it is necessary to inject gas into the annular water outlet component 7 to complete the annular water outlet, gas is first injected into the rubber ring 713 through the air pipe 73. At this time, the rubber ring 713 expands and deforms between the two hollow nets 712, thereby playing a blocking effect. Then, water is injected into the annular groove 711 through multiple flat water inlet pipes 72. Water will gradually accumulate in the annular groove 711. Because of the deformed rubber ring 713, the water flow will accumulate in the annular groove 711, and then the air will be discharged. The tube 73 extracts the gas inside the rubber ring 713, and then the rubber ring 713 shrinks. The water inside the annular groove 711 can flow along the two hollow nets 712 to the inside of the inverted cone tube 5. At this time, the annular water flow can flow to all places on the inner wall of the inverted cone tube 5, and the ingredients adhered to the inner walls of the inverted cone tube 5 and the vertical tube 6 are flushed into the interior of the heating preparation kettle 1. The method of accumulating and then releasing at one time is adopted, which can accurately measure the amount of water and ensure that the water flows to all the inner walls of the inverted cone tube 5.

[0050] Embodiment 2

[0051] Comparative Example 1, in which another embodiment of the present invention is: 30% bentonite, 60% water, 5% hydroxyethyl cellulose thickener, 3% polyethylene oxide drag reducer and 2% sodium chloride stabilizer are present inside the heating preparation kettle 1, and high-efficiency drag reducing mud is prepared according to the above preparation method.

[0052] Embodiment 3

[0053] Comparative Example 2, wherein another implementation of the present invention is: on the basis of Example 2, the amount of bentonite is adjusted to 28%, the thickener is replaced by hydroxypropyl methylcellulose, the drag reducer is replaced by polyacrylamide, and the other conditions remain unchanged, to obtain a drag reducing mud with better performance.

[0054] Embodiment 4

[0055] Comparative Example 3, another implementation of the present invention is: on the basis of Example 3, additionally adding 1% of nano-silicate material to improve the supporting performance of the mud in a specific soil layer.

[0056] Expand the use of nanomaterial enhancement technology. Specifically, nanosilicate or nanoclay materials can be added to the mud. These nanomaterials can fill the tiny pores in the mud and improve the density and support capacity of the mud.

[0057] Working principle: When it is necessary to prepare the drag-reducing mud for pipe jacking construction, water is poured into the heating preparation kettle 1 through the water inlet pipe 11, and then the water is heated by the heating mechanism inside the heating preparation kettle 1 until the water is heated to 40-60 degrees Celsius, and then the bentonite is poured into the inside of the feeding tube 3 through the feeding port 4. The bentonite will eventually fall to the top of the flip weighing component 9 and be weighed by the flip weighing component 9. After the bentonite is weighed, the flip weighing component 9 is flipped, so that the bentonite is poured into the inverted cone cylinder 5, the vertical cylinder 6 and even the last heating preparation kettle 1. The inverted cone of the inverted cone cylinder 5 The type setting allows the ingredients entering the inverted cone cylinder 5 to fall as quickly as possible. At this time, the bentonite contacts the heated water inside the heated preparation kettle 1 and is continuously stirred by the stirring paddle 124 until the bentonite is completely dissolved in the water. Then, the thickener, drag reducer and stabilizer are added in sequence. After each addition, they need to be fully stirred to ensure that the components are evenly mixed. The thickener, drag reducer and stabilizer are also weighed by the flip weighing component 9. The mixed and stirred mud is cooled to room temperature to obtain high-efficiency drag-reducing mud. The proportion of each ingredient of the drag-reducing mud is accurately determined, so that the quality of the stirred and formed drag-reducing mud is better, and the subsequent When applied to pipe jacking construction, it can make the pipe jacking construction more efficient. After an in-depth analysis of the properties of different soil layers, bentonite, water, thickener, drag reducer and stabilizer are used as ingredients. These ingredients form drag-reducing mud, which can form an effective mud sleeve in special soil layers. Because the flipping and pouring of the flip weighing component 9 will cause some ingredients to adhere to the outside of the inverted cone tube 5, at this time, an annular water outlet component 7 is provided at the annular groove 2 51, which can allow water to flow out in a ring shape to flush the inner wall of the higher position of the inverted cone tube 5. At this time, the water flows along the inner wall of the higher position of the inverted cone tube 5 to The inner wall at the bottom position can bring the adhered ingredients into the heating preparation kettle 1, and each time the ingredients are poured, water will flow out in an annular shape to clean the inner walls of the inverted cone cylinder 5 and the vertical cylinder 6 to prevent the ingredients from sticking. The annular water flow is also included in the initial water flow ratio, that is, at the beginning, the heating water injected into the heating preparation kettle 1 will be less than needed, and then the ingredients are flushed again and again to achieve the precise water ratio. The upper and lower parts of the U-shaped connector 82 can be disassembled, and all the U-shaped connectors 82 can be disassembled to take out the annular water outlet assembly 7, and replace, repair and move it.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for preparing drag-reducing mud for pipe jacking construction, comprising a heating preparation kettle (1), a water inlet pipe (11) being fixedly installed on the side of the heating preparation kettle (1), and a top cover (12) being installed above the heating preparation kettle (1), characterized in that: A feed assembly (2) is installed above the top cover (12), and the feed assembly (2) comprises a vertical cylinder (6) installed above the top cover (12) and an inverted cone cylinder (5) fixedly installed above the vertical cylinder (6); a weighing cylinder (8) is fixedly installed above the inverted cone cylinder (5); a feed cylinder (3) is fixedly installed above the weighing cylinder (8); and a feed port (4) is fixedly installed above the feed cylinder (3); The heating preparation kettle (1) is internally installed with a driving motor (123) and a stirring paddle (124) connected to the driving motor (123) via a shaft; the weighing cylinder (8) is internally movably installed with a flip weighing assembly (9); the components of the drag reduction mud for pipe jacking construction include bentonite, water, thickener, drag reducer and stabilizer; the flip weighing assembly (9) is used to weigh the bentonite, thickener, drag reducer and stabilizer; the heating preparation kettle (1) is used to heat water; and the heating preparation kettle (1) is also used to stir the bentonite, water, thickener, drag reducer and stabilizer.

2. The device for preparing drag-reducing mud for pipe jacking construction according to claim 1, characterized in that: A through slot (121) is provided inside the top cover (12), a plurality of fixing columns (122) are fixedly installed inside the through slot (121), the plurality of fixing columns (122) are fixedly connected to a driving motor (123), and the upper end of the driving motor (123) is installed in an arc shape.

3. The device for preparing drag-reducing mud for pipe jacking construction according to claim 1, characterized in that: The drag reducing mud for pipe jacking construction comprises 25%-35% bentonite, 50%-70% water, 3%-8% thickener, 2%-5% drag reducing agent, and 1%-3% stabilizer. The thickener is a cellulose ether thickener, the drag reducing agent is preferably polyethylene oxide or polyacrylamide, and the stabilizer is an inorganic salt.

4. The device for preparing drag-reducing mud for pipe jacking construction according to claim 1, characterized in that: The flip weighing assembly (9) comprises a bearing plate (91) located inside a weighing cylinder (8) and a weighing plate (92) installed below the bearing plate (91); an arc-shaped rubber sheet (93) is fixedly installed between the bearing plate (91) and the weighing plate (92); a fixed motor (81) is fixedly installed on the outside of the weighing cylinder (8); a connecting shaft of the fixed motor (81) passes through the weighing cylinder (8) and is connected to the weighing plate (92); and the arc-shaped rubber sheet (93) bulges toward the outside of the flip weighing assembly (9).

5. The device for preparing drag-reducing mud for pipe jacking construction according to claim 4, characterized in that: A rotating motor (911) is fixedly mounted above the load-bearing plate (91), a rotating head (912) is movably mounted above the rotating motor (911), and a rotating paddle (913) is fixedly mounted outside the rotating head (912).

6. The device for preparing drag-reducing mud for pipe jacking construction according to claim 5, characterized in that: A plurality of connecting columns (921) are installed above the weighing plate (92), the upper ends of the plurality of connecting columns (921) are fixedly connected to the load-bearing plate (91), and a weighing sensor is installed inside the weighing plate (92).

7. The device for preparing drag-reducing mud for pipe jacking construction according to claim 1, characterized in that: The inverted conical cylinder (5) is provided with an annular groove 2 (51) inside, an annular water outlet assembly (7) is movably installed inside the annular groove 2 (51), and the diameter of the upper end of the inverted conical cylinder (5) is larger than the diameter of the lower end.

8. The device for preparing drag-reducing mud for pipe jacking construction according to claim 7, characterized in that: The outer side of the weighing cylinder (8) is installed with a plurality of U-shaped connecting pieces (82) in a detachable installation manner, and the lower ends of the plurality of U-shaped connecting pieces (82) are installed on the outer side of the inverted cone cylinder (5) in a detachable installation manner.

9. The device for preparing drag-reducing mud for pipe jacking construction according to claim 7, characterized in that: The annular water outlet assembly (7) comprises an annular plate (71) and a plurality of flat water inlet pipes (72) fixedly mounted on the outside of the annular plate (71); an air pipe (73) is fixedly mounted on the outside of the annular plate (71).

10. The device for preparing drag-reducing mud for pipe jacking construction according to claim 9, characterized in that: The annular plate (71) is provided with an annular groove (711) inside, two hollow nets (712) are fixedly installed inside the annular groove (711), a rubber ring (713) is installed between the two hollow nets (712), the bottom of the rubber ring (713) is connected to the annular groove (711), and the annular groove (711) is connected to the inside of a plurality of flat water inlet pipes (72).

Images