Environmentally friendly cement feeding device and cement mixing pile construction system

Abstract

The present invention relates to an environmentally friendly cement feeding device and a cement mixing pile construction system. The cement feeding device includes a cement storage module, a cement upper feeding module, a liquid pump module and an air pump module. The cement upper feeding module includes a high-speed agitator, a slurry delivery power unit and a powder delivery power unit. The high-speed agitator is connected to the slurry delivery power unit through a slurry inlet control valve, the slurry delivery power unit is connected to a slurry delivery pipe, the powder delivery power unit is connected to a powder delivery pipe, and the slurry delivery power unit and the powder delivery power unit are connected to a conversion control valve; the cement storage module is connected to the high-speed agitator and the powder delivery power unit; the air pump module is respectively connected to the conversion control valve and the pulse control valve, and the other end of the pulse control valve is connected to the cement storage module; the liquid pump module is connected to the high-speed agitator. Compared with the prior art, the present invention can alternately implement powder spraying and slurry spraying operations during the pile forming process, significantly improving the pile forming quality; at the same time, one machine has multiple uses, a wide range of applications, and high practical value.

Description

Technical Field

[0001] The invention relates to the field of cement mixing pile construction, in particular to an environmentally friendly cement feeding device and a cement mixing pile construction system. Background Art

[0002] Cement mixing piles are an effective form of soft foundation treatment. They use cement as the main agent of the curing agent. The cement is sprayed into the soil and fully mixed, so that a series of physical and chemical reactions occur between the cement and the soil, hardening the soft soil and improving the foundation strength. Existing cement mixing piles usually include powder spraying single and double-direction mixing pile machines and slurry spraying single and double-direction mixing pile machines. Among them, the pile body formed by the powder spraying single and double-direction mixing pile machine is in a loose state due to insufficient moisture in the upper part, and the cement powder in the drill rod will bubble up along the drill rod, resulting in the phenomenon of "anti-ashing"; the pile body formed by the slurry spraying single and double-direction mixing pile machine has the problems of uneven mixing and clamping, and the cement slurry will bubble up along the drill rod, resulting in "anti-slurry", and because of the small amount of cement in the pile body, the construction quality cannot be guaranteed.

[0003] For example, the utility model with publication number CN204690737 discloses a cement mixing pile construction equipment, which can adjust the mud ratio of the delivered cement slurry and improve the pile quality by modifying the feeding mechanism of the slurry spraying single and double-direction mixing pile machine. However, this method has the following problems: 1. When using this equipment, it is still necessary to dig a clear water pool and make a cement pool in advance, which requires a huge workload in the early stage and has low production efficiency; during the production process of the cement pool, cement powder will fall everywhere during construction, causing serious pollution to the surrounding crops, fish ponds, shrimp ponds, etc. in the air. 2. If the cement pool is not used up at one time, a lot of waste will be caused. 3. This method still cannot overcome the "reverse slurry" phenomenon. 4. It is not suitable for powder spraying single and double-direction mixing pile machines. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide an environmentally friendly cement feeding device and a cement mixing pile construction system, so that the cement mixing pile machine will not "return dust" or "return slurry" during the construction process, will not pollute the environment, has high production efficiency and good pile quality.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] An environmentally friendly cement feeding device comprises a cement storage module, a cement feeding module, a liquid pump module and an air pump module, wherein:

[0007] The cement feeding module comprises a high-speed agitator, a slurry delivery power unit and a powder delivery power unit, the high-speed agitator is connected to the slurry delivery power unit through a slurry feed control valve, the output end of the slurry delivery power unit is connected to the slurry delivery pipe through a slurry delivery control valve, the output end of the powder delivery power unit is connected to the powder delivery pipe through a powder delivery control valve, the input ends of the slurry delivery power unit and the powder delivery power unit are both connected to a conversion control valve, the cement storage module is respectively connected to the high-speed agitator and the powder delivery power unit through a first connecting pipe, a slurry delivery feed control valve is provided between the first connecting pipe and the high-speed agitator, and a powder delivery feed control valve is provided between the first connecting pipe and the powder delivery power unit;

[0008] The air pump module is connected to the conversion control valve and the pulse control valve respectively through the air inlet connecting pipe, the other end of the pulse control valve is connected to the cement storage module, and the liquid pump module is connected to the high-speed agitator through the water outlet connecting pipe, and the water outlet connecting pipe is provided with a water outlet control valve.

[0009] Furthermore, the water outlet connecting pipe and the slurry delivery pipe are connected via a third connecting pipe, and a water delivery control valve is provided on the third connecting pipe.

[0010] Furthermore, the air intake connecting pipe is also connected to the powder conveying power unit through an air intake control valve.

[0011] Furthermore, the cement feeding module is installed on the ground through a bracket, and a weight sensor is installed on the bracket.

[0012] Furthermore, the high-speed agitator is provided with a specific gravity meter.

[0013] Furthermore, the slurry conveying power unit and the powder conveying power unit are both provided with pressure sensors.

[0014] Further, the cement storage module includes a bulk cement storage tank; or the cement storage module includes a storage tank and a bagged cement feed tank, the storage tank is connected to a first connecting pipe and a second connecting pipe, the bagged cement feed tank is connected to the storage tank via a transmission pipe, a feeding control valve is provided on the transmission pipe, the air pump module is connected to the upper end of the bagged cement feed tank via an air intake connecting pipe, and a pressure control valve is provided on the connecting pipe portion connected to the bagged cement feed tank in the air intake connecting pipe. A ventilation filter is also provided on the storage tank, and an upper limit sensor and a lower limit sensor may also be provided on the cement feed tank.

[0015] Furthermore, it also includes a fourth connecting pipe, a fifth connecting pipe, an exhaust control valve, an air blowing control valve and an air compression control valve, one end of the fourth connecting pipe is connected to the powder conveying pipe, and the other two ends are connected to the exhaust control valve and the air blowing control valve, the other end of the exhaust control valve is connected to the upper end of the storage tank through the fifth connecting pipe, the other end of the air blowing control valve is connected to the air intake connecting pipe, and the fifth connecting pipe is also connected to the air intake connecting pipe through the air compression control valve.

[0016] Furthermore, the powder conveying power unit and the slurry conveying power unit output cement powder and cement slurry alternately through the powder conveying pipe and the slurry conveying pipe respectively.

[0017] A cement mixing pile construction system comprises a cement mixing pile machine and the cement feeding device as described above.

[0018] Furthermore, the cement mixing pile machine comprises an inner drill rod and an outer drill rod nested in each other, the inner drill rod is hollow inside, a first sealing collar is provided at the upper end for connecting to a powder delivery pipe, the outer drill rod is sleeved on the outer ring of the inner drill rod, a second sealing collar is provided at the end of the outer drill rod for connecting to a slurry delivery pipe. A material injection port and a rotating blade may also be provided at the bottom of the inner drill rod and the outer drill rod, and a dryness and humidity sensor is also provided at the lower end of the outer drill rod.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention realizes the cement mixing pile construction operation of simultaneously delivering powder and slurry through the slurry delivery power unit and the powder delivery power unit, and can alternately implement powder spraying and slurry spraying operations during the pile forming process, completely overcoming the "anti-ash" and "anti-slurry" phenomena, and significantly improving the pile forming quality. At the same time, the cement conveying device of the present invention is a multi-purpose machine, and can be independently adapted to the existing powder spraying single and double-direction cement mixing pile machine or slurry spraying single and double-direction cement mixing pile machine, with a wide range of applications and high practical value.

[0021] 2. The present invention can directly convey bagged or bulk cement powder to work, and realizes real-time generation of cement slurry through a high-speed agitator, thereby improving production and construction efficiency and being easy to operate.

[0022] 3. The air pump module and the cement storage module are connected through a pulse control valve, which can fully atomize the cement powder in the cement storage module to facilitate rapid feeding.

[0023] 4. For the bulk cement mixing system, the air pump module is connected to the powder conveying power unit through the air intake connecting pipe and the air intake control valve, which can help increase the pressure in the powder conveying power unit, and the powder conveying power unit conveys cement powder into the powder conveying pipe; at the same time, before the powder conveying control valve is closed each time, the air intake control valve is automatically opened once and closed with a delay. Through this operation, the high-pressure gas in the air storage tank can be used to quickly allow the powder in the powder conveying pipe to enter the soil body;

[0024] For the bagged cement mixing system, the air pump module is connected to the powder conveying pipe at the front end of the powder conveying control valve through the air inlet connecting pipe and the air blowing control valve. After each time the powder conveying control valve is closed, the air blowing control valve is automatically opened once and closed with a delay. The purpose is to use high-pressure gas to quickly allow the powder in the powder conveying pipe to enter the soil.

[0025] 5. The water outlet connecting pipe is connected to the slurry delivery pipe through the third connecting pipe and the water delivery control valve. Water can be directly supplied to the drill rod through the liquid pump module during the drilling rod lifting process, so as to further adjust the dryness and wetness of the powder slurry in the pile body and improve the pile quality.

[0026] 6. The cement storage module combines the air pump module through the structure of the storage tank and the bagged cement feed tank, which simplifies the overall structure and makes it easier for construction workers to add bagged cement powder. At the same time, it reduces dust during the construction process and plays a role in protecting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of embodiment 1.

[0028] Figure 2 This is a schematic diagram of the structure of the cement upper feeding module in Example 1.

[0029] Figure 3 It is a structural schematic diagram of the cement upper feeding module in Example 2.

[0030] Figure 4 This is a schematic diagram of the structure of the third embodiment.

[0031] Figure 5 It is a structural diagram of embodiment 4.

[0032] Reference numerals:

[0033] 1. Cement storage module, 101. Bulk cement storage tank, 102. Storage tank, 103. Bag cement feed tank, 104. Transmission pipe, 105. Loading control valve, 106. Pressurization control valve, 107. Ventilation filter, 108. Lower limit sensor, 109. Cement feed control valve, 110. Upper limit sensor, 111. Blowing control valve, 112. Compressed air control valve, 113. Exhaust control valve.

[0034] 2. Cement feeding module, 201. High-speed agitator, 202. Slurry feeding power unit, 203. Powder feeding power unit, 204. Conversion control valve, 205. Slurry feeding control valve, 206. Powder feeding control valve, 207. Slurry inlet control valve, 208. Slurry feeding control valve, 209. Powder feeding control valve, 210. Pulse control valve, 211. Water outlet control valve, 212. Specific gravity meter, 213. Pressure sensor, 214. Bracket, 215. Weight sensor, 216. Flow controller, 218. Water feeding control valve, 219. Air intake control valve, 220. Slurry feeding weighing sensor.

[0035] 3. Liquid pump module, 301, booster pump;

[0036] 4. Air pump module, 401. Air storage tank, 402. Air compressor;

[0037] 5. Cement mixing pile machine, 501. inner drill rod, 502. outer drill rod, 503. first sealing ring, 504. second sealing ring, 505. dryness and humidity sensor;

[0038] 601, the first connecting pipe, 602, the second connecting pipe, 603, the third connecting pipe, 604, the air inlet connecting pipe, 605, the water outlet connecting pipe, 606, the slurry conveying pipe, 607, the powder conveying pipe, 608, the fourth connecting pipe, 609, the fifth connecting pipe. DETAILED DESCRIPTION

[0039] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0040] Embodiment 1

[0041] like Figure 1 As shown, this embodiment provides a cement mixing pile construction system, including a cement mixing pile machine 5 and a cement conveying device.

[0042] The cement mixing pile machine 5 includes an inner drill rod 501 and an outer drill rod 502 which are nested with each other. The inner drill rod 501 is hollow inside, and a first sealing collar 503 is provided at the upper end thereof for connecting to a powder delivery pipe 607. The outer drill rod 502 is sleeved on the outer ring of the inner drill rod 501, and a second sealing collar 504 is provided at the end of the outer drill rod 502 for connecting to a slurry delivery pipe 606. A material injection port and a rotating blade are provided at the bottom of the inner drill rod 501 and the outer drill rod 502. A dryness and humidity sensor 505 is also provided at the lower end of the outer drill rod 502.

[0043] The cement conveying device includes a cement storage module 1, a cement upper feeding module 2, a liquid pump module 3 and an air pump module 4. The cement storage module 1 includes a bulk cement storage tank 101, which has a very large capacity and can store dozens of tons of cement. The bottom of the bulk cement storage tank 101 is a conical structure. The air pump module 4 includes an air storage tank 401 and an air compressor 402 connected to each other. The liquid pump module 3 includes a booster pump 301 and a water tank or a water pipe connected to the booster pump 301.

[0044] like Figure 2 As shown, the cement feeding module 2 includes a high-speed agitator 201, a slurry feeding power unit 202 and a powder feeding power unit 203. Among them:

[0045] The slurry conveying power unit 202 and the powder conveying power unit 203 can be canned containers of any shape, such as a long strip, a cylindrical barrel, etc.; a specific gravity meter 212 is installed on the side of the high-speed agitator 201, a ventilation filter port that can be opened or closed is provided on the top, and a slurry conveying weighing sensor 220 is installed at the bottom.

[0046] The high-speed agitator 201 is installed above the slurry delivery power unit 202 and is connected to the slurry delivery power unit 202 through the slurry inlet control valve 207. The right ends of the slurry delivery power unit 202 and the powder delivery power unit 203 are both input ends, and the left ends are both output ends. The input ends of the slurry delivery power unit 202 and the powder delivery power unit 203 are both connected to a conversion control valve 204. The conversion control valve 204 is an existing pneumatic control valve or hydraulic control valve, which has two power mechanisms (generally piston mechanisms), which are respectively connected to the slurry delivery power unit 202 and the powder delivery power unit 203, and are used to push the cement slurry or cement powder in the unit to spray out. The output end of the slurry delivery power unit 202 is connected to the outer drill rod 502 of the cement mixing pile machine 5 through the slurry delivery control valve 208 and the slurry delivery pipe 606; the output end of the powder delivery power unit 203 is connected to the inner drill rod 501 of the cement mixing pile machine 5 through the powder delivery control valve 209 and the powder delivery pipe 607. Pressure sensors 213 are also provided on the slurry conveying power unit 202 and the powder conveying power unit 203 .

[0047] The bottom of the bulk cement storage tank 101 is connected to the high-speed agitator 201 and the powder delivery power unit 203 through the first connecting pipe 601 respectively; a slurry delivery feed control valve 205 is provided between the first connecting pipe 601 and the high-speed agitator 201; a powder delivery feed control valve 206 is provided between the first connecting pipe 601 and the powder delivery power unit 203. The air storage tank 401 is connected to the conversion control valve 204 and the pulse control valve 210 in sequence through the air intake connecting pipe 604, and the other end of the pulse control valve 210 is connected to the outer peripheral wall of the bottom of the bulk cement storage tank 101. The booster pump 301 is connected to the high-speed agitator 201 through the water outlet connecting pipe 605, and a water outlet control valve 211 connected to the water outlet connecting pipe 605 is provided on the side wall of the high-speed agitator 201. A flow controller 216 is also provided on the water outlet connecting pipe 605.

[0048] The cement upper feeding module 2 is installed on the ground through a bracket 214 , and a weight sensor 215 is installed on the bracket 214 .

[0049] Each connecting pipe and component is connected by flanges, elbows, universal joints, etc.

[0050] This embodiment may also include an integrated control system for connecting the various components to open and close, start and stop the various components.

[0051] The working process of this embodiment is:

[0052] First, open the air pump module and the pulse control valve 210. The pulse control valve 210 is opened every 6 to 8 seconds, and the high-pressure gas in the gas storage tank 401 passes through the air inlet connecting pipe 604 and the second connecting pipe 602 to fully atomize the cement powder in the bulk cement storage tank 101.

[0053] At the same time, the booster pump 301, the water outlet control valve 211, the high-speed agitator 201 and the ventilation filter port of the high-speed agitator 201 are opened, and water is injected into the high-speed agitator 201 in advance. The amount of water added is determined by the flow controller 216 installed on the water outlet connecting pipe 605 and the slurry delivery weighing sensor 220 located between the slurry delivery power unit 202 and the high-speed agitator 201.

[0054] After a delay of 5 seconds, the powder feeding control valve 206 and the slurry feeding control valve 205 are automatically opened, and cement powder is sent to the high-speed agitator 201 and the powder feeding power unit 203 through the first connecting pipe 601 for feeding:

[0055] After the cement powder in the powder conveying power unit 203 is full, the powder conveying feed control valve 206 can be closed to complete the feeding;

[0056] In the high-speed agitator 201, the water and cement powder quickly form cement slurry through the pressure of high-pressure water and the interaction with the high-speed agitator 201. The specific gravity of the cement slurry is set in advance according to the water-powder ratio. In order to accurately control the specific gravity of the cement slurry, the cement slurry can be quickly adjusted through the specific gravity meter 212 and the flow controller 216. When the specific gravity of the cement slurry reaches the specified value, the water outlet control valve 211 and the slurry feeding control valve 205 are closed at the same time, and the slurry feeding control valve 207 is opened at the same time, and the cement slurry is input into the slurry feeding power unit 202, and the high-speed agitator 201, the slurry feeding control valve 207, the ventilation filter port and the booster pump 301 are closed to complete the feeding.

[0057] Then, the conversion control valve 204 is opened, and the cement slurry and cement powder in the powder delivery power unit 203 and the slurry delivery power unit 202 are driven in turn by the power mechanism:

[0058] When the pressure in the powder conveying power unit 203 reaches the set value, the powder conveying control valve 209 is automatically opened. The powder conveying power unit 203 conveys the cement powder directly to the inner drill rod 501 of the cement mixing pile driver 5 through the powder conveying pipe 607, and sprays it into the ground through the spraying port at the bottom of the inner drill rod 501. The feeding amount is automatically adjusted and controlled by the weight sensor 215 installed on the bracket 214 and the depth sensor set on the pile driver. When the powder conveying power unit 203 completes the powder conveying, the powder conveying control valve 209 is automatically closed;

[0059] When the pressure in the slurry delivery power unit 202 reaches the set value, the slurry delivery control valve 208 is automatically opened. The slurry delivery power unit 202 delivers slurry. The cement slurry passes through the slurry delivery pipe 606 and the outer drill rod 502, and is sprayed out from the spray port of the outer drill rod 502 into the soil. The delivery amount is automatically adjusted and controlled by the flow controller 216 installed on the slurry delivery pipe 606, the weight sensor 215 installed on the bracket 214, and the depth sensor set on the pile driver. When the slurry delivery power unit 202 completes the slurry delivery, the slurry delivery control valve 208 is automatically closed.

[0060] The conversion control valve 204 alternately starts the powder or slurry delivery of the slurry delivery power unit 202 and the powder delivery power unit 203. First, cement powder is delivered for full mixing, then cement slurry is delivered and mixed again, so that the pile body is mixed more evenly during the entire construction process. The drilling depth and powder delivery amount of the inner drill rod 501 in the cement mixing pile driver 5 are automatically controlled by the pile driver depth sensor, the weight sensor 215 on the cement upper feeding module 2, and the conversion control valve 204 for every 0.1~0.2 meters of powder; the drilling depth and slurry delivery amount of the outer drill rod 502 of the cement mixing pile driver 5 are automatically controlled by the pile driver depth sensor, the weight sensor 215 on the cement upper feeding module 2, the dryness and humidity sensor 505 installed at the lower end of the outer drill rod 502, and the conversion control valve 204 for every 0.1~0.2 meters of slurry.

[0061] According to the construction design requirements, the powder delivery amount and the slurry delivery amount can be set in advance. When the pile driver drill rod reaches the designed depth, the powder delivery power unit 203 and the slurry delivery power unit 202 both stop working.

[0062] This embodiment realizes the cement mixing pile construction operation of simultaneously delivering powder and slurry through the slurry delivery power unit 202 and the powder delivery power unit 203, and can alternately implement powder spraying and slurry spraying operations during the pile forming process, completely overcoming the "anti-ash" and "anti-slurry" phenomena, and significantly improving the pile forming quality. At the same time, if there is a single slurry delivery power unit 202 or a powder delivery power unit 203, this embodiment can be used for multiple purposes, adapted to the existing powder spraying single and double-direction cement mixing pile machines or slurry spraying single and double-direction cement mixing pile machines, with a wide range of applications and high practical value.

[0063] Embodiment 2

[0064] like Figure 3 As shown, the basic structure of this embodiment is the same as that of the first embodiment, and the difference is that:

[0065] The water outlet connecting pipe 605 and the slurry delivery pipe 606 are connected via the third connecting pipe 603 and the water delivery control valve 218. The air intake connecting pipe 604 is also connected to the powder delivery power unit 203 via the air intake control valve 219. A flow controller 216 is additionally provided on the slurry delivery pipe 606.

[0066] During the construction process of this embodiment, the powder delivery power unit 203 not only controls the powder delivery through the conversion control valve 204 and the powder delivery control valve 209, but also opens the air intake control valve 219 during the powder delivery process to increase the pressure in the powder delivery power unit 203 and improve the efficiency of the powder delivery power unit 203 in delivering cement powder to the powder delivery pipe 607. After the powder delivery power unit 203 completes the powder delivery, the powder delivery control valve 209 automatically closes. Each time the powder delivery control valve 209 is closed, the air intake control valve 219 automatically opens once and closes with a delay, in order to use high-pressure gas to allow the powder in the powder delivery pipe to quickly enter the soil. When the drill rod is lifted, the powder delivery control valve 209 and the air intake control valve 219 are opened at the same time to keep the inner drill rod nozzle unobstructed with an appropriate amount of gas to prevent the nozzle from being blocked.

[0067] At the same time, the booster pump 301 and the water delivery control valve 218 are also opened when the drill rod is lifted, and clean water is directly poured into the pile body, and the water flow is controlled by the flow controller 216 and the dryness and humidity sensor 505 at the lower end of the outer drill rod 502, and the dryness and humidity of the powder slurry in the pile body are regulated again. When the pile driver drill bit is about to leave the ground, the powder delivery control valve 209 and the air intake control valve 219, the booster pump 301, the water delivery control valve 218 and the pulse control valve 210 are all closed.

[0068] Embodiment 3

[0069] like Figure 4 As shown, the basic structure of this embodiment is the same as that of the first embodiment, and the difference is that:

[0070] The cement storage module 1 includes a storage tank 102 and a bagged cement feed tank 103. The lower end of the storage tank 102 is a conical structure, and is connected to a first connecting pipe 601 and a second connecting pipe 602 in the same manner as the bulk cement storage tank 101 in the first embodiment. The bagged cement feed tank 103 is connected to the storage tank 102 through a transmission pipe 104, and a feeding control valve 105 is provided on the transmission pipe 104. The air pump module 4 is connected to the upper end of the bagged cement feed tank 103 through an air intake connecting pipe 604, and a pressure control valve 106 is provided in the connecting pipe part connected to the bagged cement feed tank 103 in the air intake connecting pipe 604, and the storage tank 102 is a container provided with a ventilation filter 107. The bagged cement feed tank 103 is a sealed container, and a cement feed control valve 109 is provided at the upper end, and an upper limit sensor 110 and a lower limit sensor 108 are provided on the outside.

[0071] The working process of this embodiment is:

[0072] Open the cement feed control valve 109, and manually add bagged cement to the bagged cement feed tank 103. When the amount of cement powder in the bagged cement feed tank 103 triggers the upper limit sensor 110, the cement feed control valve 109 is automatically closed. Delay for 5 seconds to allow the cement feed control valve 109 to be completely closed, open the air compressor 402 and the pressure control valve 106 of the air intake pipe, and close the other control valves. At the same time, open the feeding control valve 105 and the ventilation filter 107. High-pressure air presses the cement powder in the bagged cement feed tank 103 along the transmission pipe 104 into the storage tank 102. When the amount of cement powder in the bagged cement feed tank 103 triggers the lower limit sensor 108, close the pressure control valve 106, and then delay for 8 to 10 seconds to close the feeding control valve 105 first and then the ventilation filter 107. Then continue the working process as in Example 1.

[0073] Embodiment 4

[0074] like Figure 5 As shown, the basic structure of this embodiment is basically the same as that of the third embodiment, and the difference lies in:

[0075] This embodiment also includes a fourth connecting pipe 608, a fifth connecting pipe 609, an exhaust control valve 113, an air blowing control valve 111 and an air pressure control valve 112. One end of the fourth connecting pipe 608 is connected to the powder conveying pipe 607, and the other two ends are connected to the exhaust control valve 113 and the air blowing control valve 111. The other end of the exhaust control valve 113 is connected to the upper end of the storage tank 102 through the fifth connecting pipe 609. The other end of the air blowing control valve 111 is connected to the air intake connecting pipe 604. The fifth connecting pipe 609 is also connected to the air intake connecting pipe 604 through the air pressure control valve 112. In addition, the air intake connecting pipe 604 is also connected to the powder conveying power unit 203 through the air intake control valve 219.

[0076] The working principle of this embodiment is:

[0077] During the construction process of this embodiment, the powder conveying power unit 203 not only controls the powder conveying through the conversion control valve 204 and the powder conveying control valve 209, but also increases the internal pressure of the powder conveying pipe 607 by controlling the air blowing control valve 111 during the powder conveying process, thereby improving the efficiency of cement powder conveying by the powder conveying pipe 607. The specific process is as follows: when the powder conveying power unit 203 completes the powder conveying, the powder conveying control valve 209 automatically closes. After each closing of the powder conveying control valve 209, the air blowing control valve 111 automatically opens once and closes with a delay, in order to enable the powder in the powder conveying pipe 607 to quickly enter the soil through high-pressure gas.

[0078] In the process of the storage tank 102 transmitting cement powder to the powder conveying power unit 203 and the high-speed agitator 201 through the first connecting pipe 601, the exhaust control valve 113, the air intake control valve 219, the pressurization control valve 106 and the air blowing control valve 111 are closed, and the compressed air control valve 112 is opened to inject gas into the storage tank 102 to increase the internal pressure of the storage tank 102 and increase the cement powder conveying efficiency. In addition, the pulse control valve 210 can also apply pressure to the storage tank 102, and the two pipelines pressurize the storage tank 102, which can work simultaneously and be redundant.

[0079] During the process of drilling rod lifting, since the storage tank 102 is already full of high-pressure gas, if the ventilation filter is opened directly, it will fail due to excessive pressure. At this time, the pulse control valve 210 is closed and the exhaust control valve 113 is opened. The exhaust control valve 113 delivers the high-pressure gas in the storage tank 102 into the soil through the fifth connecting pipe 609, the fourth connecting pipe 608 and the powder conveying pipe 607, keeps the nozzle of the inner drill rod 501 unobstructed, and releases the pressure in the storage tank 102 to prevent the ventilation filter from failing and causing emission pollution. After a delay of a period of time, the exhaust control valve 113 is closed, the ventilation filter on the upper part of the storage tank 102 is opened, and the ventilation filter discharges dust-free gas. The blowing control valve 111 opens automatically, and the blowing control valve 111 opens once every period of time to prevent the nozzle of the inner drill rod from being blocked.

[0080] When the pile driver drill bit is about to leave the ground, the air blowing control valve 111 is closed.

[0081] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. An environmentally friendly cement feeding device, characterized in that: It comprises a cement storage module (1), a cement feeding module (2), a liquid pump module (3) and an air pump module (4), wherein: The cement feeding module (2) comprises a high-speed agitator (201), a slurry delivery power unit (202) and a powder delivery power unit (203); the high-speed agitator (201) is connected to the slurry delivery power unit (202) via a slurry inlet control valve (207); the output end of the slurry delivery power unit (202) is connected to a slurry delivery pipe (606) via a slurry delivery control valve (208); the output end of the powder delivery power unit (203) is connected to a powder delivery pipe (607) via a powder delivery control valve (209); The input ends of the slurry conveying power unit (202) and the powder conveying power unit (203) are both connected to the conversion control valve (204); the cement storage module (1) is respectively connected to the high-speed agitator (201) and the powder conveying power unit (203) via a first connecting pipe (601); a slurry conveying feed control valve (205) is provided between the first connecting pipe (601) and the high-speed agitator (201); and a powder conveying feed control valve (206) is provided between the first connecting pipe (601) and the powder conveying power unit (203); The air pump module (4) is respectively connected to the conversion control valve (204) and the pulse control valve (210) via an air inlet connecting pipe (604); the other end of the pulse control valve (210) is connected to the cement storage module (1); the liquid pump module (3) is connected to the high-speed stirrer (201) via a water outlet connecting pipe (605); and a water outlet control valve (211) is provided on the water outlet connecting pipe (605); The high-speed agitator (201) is provided with a specific gravity meter (212), and the air intake connecting pipe (604) is also connected to the powder conveying power unit (203) via an air intake control valve (219); the cement upper feeding module (2) is installed on the ground via a bracket (214), and a weight sensor (215) is installed on the bracket (214); the slurry conveying power unit (202) and the powder conveying power unit (203) are both provided with a pressure sensor (213); the water The mud storage module (1) comprises a storage tank (102) and a bagged cement feed tank (103), wherein the storage tank (102) is connected to a first connecting pipe (601) and a second connecting pipe (602), and the bagged cement feed tank (103) is connected to the storage tank (102) via a transmission pipe (104), and a feeding control valve (105) is provided on the transmission pipe (104). The air pump module (4) is connected to the upper end of the bagged cement feed tank (103) via an air intake connecting pipe (604), and In the air intake connecting pipe (604), a connecting pipe portion connected to the bagged cement feed tank (103) is provided with a pressure control valve (106); the connecting pipe also includes a fourth connecting pipe (608), a fifth connecting pipe (609), an exhaust control valve (113), an air blowing control valve (111) and an air compression control valve (112); one end of the fourth connecting pipe (608) is connected to the powder conveying pipe (607), and the other end is connected to the exhaust control valve (113) and the air blowing control valve (111); The other end of the air control valve (113) is connected to the upper end of the storage tank (102) via a fifth connecting pipe (609); the other end of the air blowing control valve (111) is connected to the air intake connecting pipe (604); the fifth connecting pipe (609) is further connected to the air intake connecting pipe (604) via a compressed air control valve (112); the powder conveying power unit (203) and the slurry conveying power unit (202) respectively output cement powder and cement slurry alternately via a powder conveying pipe (607) and a slurry conveying pipe (606).

2. The environmentally friendly cement feeding device according to claim 1 is characterized in that: The water outlet connecting pipe (605) and the slurry delivery pipe (606) are connected via a third connecting pipe (603), and a water delivery control valve (218) is provided on the third connecting pipe (603).

3. A cement mixing pile construction system, characterized in that: The invention comprises a cement mixing pile machine (5), and an environmentally friendly cement feeding device as claimed in any one of claims 1 to 2, wherein the cement mixing pile machine (5) comprises an inner drill rod (501) and an outer drill rod (502) which are nested with each other, the inner drill rod (501) is hollow inside, and a first sealing ring (503) is provided at the upper end for connecting to a powder conveying pipe (607), and the outer drill rod (502) is sleeved on the outer ring of the inner drill rod (501), and a second sealing ring (504) is provided at the end of the outer drill rod (502) for connecting to a slurry conveying pipe (606).

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