CN111571815A - Mixed grouting preparation system - Google Patents
Mixed grouting preparation system Download PDFInfo
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- CN111571815A CN111571815A CN202010439229.0A CN202010439229A CN111571815A CN 111571815 A CN111571815 A CN 111571815A CN 202010439229 A CN202010439229 A CN 202010439229A CN 111571815 A CN111571815 A CN 111571815A
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- grouting
- supply system
- pump
- valve
- water
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C9/00—General arrangement or layout of plant
- B28C9/002—Mixing systems, i.e. flow charts or diagrams; Making slurries; Involving methodical aspects; Involving pretreatment of ingredients; Involving packaging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/0404—Proportioning
- B28C7/0418—Proportioning control systems therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/0481—Plant for proportioning, supplying or batching
Abstract
The invention discloses a mixed grouting preparation system relating to the technical field of engineering construction, which comprises a solid-state ingredient supply system, a conveying device, a mixing and stirring device, a water supply system, a cleaning system, a grouting system and an adjusting reagent supply system; the mixing and stirring device is provided with a feeding valve, an inner wall cleaning device and a cement distributing valve; the solid ingredient supply system is assembled with the feeding valve by the conveying device, and the water supply system and the regulating reagent supply system are respectively assembled with the mixing and stirring device by pipelines; the cleaning system is respectively connected with the inner wall cleaning device and the water supply system, and the grouting system is assembled with the cement distributing valve. The solid ingredient supply system and the water supply system are programmed to control the types and percentages of the ingredients, and the reagent supply system is adjusted to provide chemical reagents for the mixing and stirring device, so that the quality of the cement slurry is improved as required. The cleaning system can clean the cement layer adhered to the inner part of the tank body, and the normal operation of the preparation system is ensured.
Description
Technical Field
The invention belongs to the technical field of engineering construction, and particularly relates to a mixed grouting preparation system.
Background
At the present stage, the cement paste ingredients are generally proportioned in a mode of manually and visually observing the ingredient proportion, so that the working efficiency is reduced, the quality of the cement paste cannot be guaranteed, and the quality of the cement paste is particularly important for some important facilities.
In addition, the automatic stirring device for cement slurry on the market has certain defects. Due to the unique property of cement, a cement shell is left on the inner wall of the tank body and the stirrer, and the cement shell becomes thicker along with the accumulation of time, so that the volume of the tank body is reduced, and meanwhile, additional burden is added to the stirring device. When long-time outage, agitating unit can't the during operation, and the cement in the jar can solidify gradually, influences the grout quality and sets up and leads to the fact the guarantor of the jar body useless even, drags the engineering progress slowly.
Disclosure of Invention
In order to solve the problem of low precision of cement slurry proportioning in the prior art, the invention provides a mixed grouting preparation system, which improves the quality of cement slurry by automatically controlling the feeding proportion of ingredients through the system.
The technical method for solving the technical problem is as follows: a mixed grouting preparation system comprises a solid ingredient supply system, a conveying device, a mixing and stirring device, a water supply system, a cleaning system, a grouting system and an adjusting reagent supply system; the top end, the inside and the bottom of the mixing and stirring device are respectively and correspondingly provided with a feeding valve, an inner wall cleaning device and a cement distributing valve, and the cement distributing valve is provided with a drain outlet; the solid ingredient supply system is assembled with the feeding valve through a conveying device, and the water supply system and the regulating reagent supply system are respectively assembled with the mixing and stirring device through pipelines; the cleaning system is connected with the inner wall cleaning device and the water supply system through pipelines, and the grouting system is assembled with the cement distributing valve through pipelines. The solid ingredient supply system and the water supply system are programmed to control the type and percentage of each ingredient to provide different desired cementitious slurries. The reagent supply system is adjusted to provide chemical reagents to the mixing and agitating device to improve the quality of the cement slurry as desired. The cleaning system can clean the cement layer adhered to the inner part of the tank body, and the normal operation of the preparation system is ensured.
Furthermore, the solid ingredient supply system consists of a plurality of groups of supply units for storing different ingredient types, and each group of supply units is matched with the conveying device; each group of supply units comprises a batching storage box, a gate matched with the batching storage box, a driving motor matched with the gate and a discharging device matched with the batching storage box and the conveying device. The driving motor and the discharging device are controlled by a system program, so that the gate is opened, and the required ingredients are conveyed to the conveying device and the mixing and stirring device through the discharging device.
Furthermore, the ingredient storage box is provided with a quality sensing device for sensing the dynamic change of ingredients. The quality sensing device is used for detecting the dynamic change of the batching quality in the batching storage box in real time, and when the numerical value calculated in advance by the system is reached, the quality sensing device triggers signals to the driving motor and the discharging device to stop feeding and close the gate.
Further, the water supply system comprises a water storage tank, a No. 2 three-way electric valve and a No. 4 pump; no. 4 pump is with pipe connection mixing stirring device and water storage box, and No. 2 tee bend motorised valve is located between No. 4 pump and the mixing stirring device, No. 2 tee bend motorised valve links to each other with external water source in addition with the pipeline. When the water storage tank is lack of water, the No. 2 three-way electric valve closes the valve leading to the mixing and stirring device and opens the valve leading to the external water source; meanwhile, the pump No. 4 is reversely rotated, the water is pumped into the water storage tank, the flow meter No. 3 sends water flow data to a system program, and the water injection progress is calculated by the system so as to be stopped in time.
Furthermore, the cleaning system comprises a cement cleaning agent storage tank, a No. 3 pump connected with the inner wall cleaning device through a pipeline, and a No. 1 three-way electric valve connected with the No. 3 pump and the cement cleaning agent storage tank through a pipeline; the No. 1 three-way electric valve is connected with the water storage tank through a pipeline. The cement cleaning agent is sprayed to the mixing and stirring device through the No. 3 pump and the inner wall cleaning device, and a cement layer adhered to the inside of the mixing and stirring device can be effectively removed. When the set time is reached, the No. 1 three-way electric valve closes the valve leading to the cement cleaning agent storage tank and opens the valve leading to the water storage tank, and residual cement cleaning agent in the mixing and stirring device is removed by water. The cleaned cement and the residual cement cleaning agent are discharged from the sewage outlet.
Furthermore, the grouting system comprises a No. 1 grouting machine and a No. 2 grouting machine, wherein the No. 1 grouting machine and the No. 2 grouting machine are respectively connected with the cement distributing valve through pipelines; the No. 1 grouting machine is additionally connected with the water storage tank through a No. 5 pump and a pipeline, and the No. 2 grouting machine is additionally connected with the water storage tank through a No. 6 pump and a pipeline; and a No. 3 electric valve is arranged between the No. 5 pump and the water storage tank, and a No. 4 electric valve is arranged between the No. 6 pump and the pipeline and the water storage tank. 2 the grouter of group has accelerated work efficiency greatly, goes into 2 grouters of group through No. 5 pumps and No. 6 pumps with the water pump of water storage box, can wash the slip casting mouth, avoids the adhesion on cement layer.
Further, the regulating reagent supply system comprises a water glass supply unit and a chemical liquid supply unit; the chemical liquid storage tank is connected with the mixing and stirring device through a No. 2 pump and a pipeline; be equipped with No. 1 motorised valve between No. 1 pump and the sodium silicate storage jar, be equipped with No. 2 motorised valves between No. 2 pump and the chemical liquid storage jar. The water glass supply unit and the chemical liquid supply unit are used for supplying water glass and chemical liquid, so that cement slurries with different properties can be produced.
Furthermore, a No. 1 flow meter, a No. 2 flow meter and a No. 3 flow meter for detecting the dynamic state of liquid flow are respectively arranged between the No. 1 electric valve and the water glass storage tank, between the No. 2 electric valve and the chemical liquid storage tank and between the No. 2 three-way electric valve and the water storage tank. The flow change is detected, the allocation accuracy is improved, and the product quality is improved.
Furthermore, the preparation system can be additionally provided with a solid ingredient supply system and a water glass supply unit, a solid ingredient supply system and a chemical liquid supply unit, and a chemical liquid supply unit and a water glass supply unit which are coordinated to operate according to requirements, so that mixed products with different effects are produced. One machine has multiple purposes, saves the occupied space of other equipment and improves the production efficiency.
Compared with the prior art, the invention has the following advantages and prominent effects: the system controls the blending proportion and the type of cement slurry, so that the product quality is improved, and the product types are enriched; the arranged cleaning system can remove a cement layer adhered to the interior of the device, so that the normal operation of the equipment is ensured; the preparation system has high integration degree, replaces manual proportioning, and improves the working efficiency.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a block diagram of the structure of the embodiment of the present invention.
Detailed Description
In order to better understand the technical solution of the present invention, the following detailed description is made with reference to the specific embodiments and the accompanying drawings.
As shown in fig. 1, a mixed grouting preparation system includes a solid ingredient supply system, a conveying device, a mixing and stirring device, a water supply system, a cleaning system, a grouting system, and a regulating agent supply system; the top end, the inside and the bottom of the mixing and stirring device are respectively and correspondingly provided with a feeding valve, an inner wall cleaning device and a cement distributing valve, and the cement distributing valve is provided with a drain outlet; the solid ingredient supply system is assembled with the feeding valve through a conveying device, and the water supply system and the regulating reagent supply system are respectively assembled with the mixing and stirring device through pipelines; the cleaning system is connected with the inner wall cleaning device and the water supply system through pipelines, and the grouting system is assembled with the cement distributing valve through pipelines. The solid ingredient supply system and the water supply system are programmed to control the type and percentage of each ingredient to provide different desired cementitious slurries. The reagent supply system is adjusted to provide chemical reagents to the mixing and agitating device to improve the quality of the cement slurry as desired. The cleaning system can clean the cement layer adhered to the inner part of the tank body, and the normal operation of the preparation system is ensured. The preparation system can be additionally provided with a solid ingredient supply system and a water glass supply unit, a solid ingredient supply system and a chemical liquid supply unit, and a chemical liquid supply unit and a water glass supply unit which are coordinated to operate according to requirements, so that mixed products with different effects are produced. One machine has multiple purposes, saves the occupied space of other equipment and improves the production efficiency.
As shown in fig. 1, the solid ingredient supply system is composed of a plurality of groups of supply units for storing different ingredient types, and each group of supply units is installed in a matching way with the conveying device; each group of supply units comprises a batching storage box, a gate matched with the batching storage box, a driving motor matched with the gate and a discharging device matched with the batching storage box and the conveying device. The ingredient storage box is provided with a quality sensing device for sensing the dynamic change of ingredients. The quality sensing device is used for detecting the dynamic change of the batching quality in the batching storage box in real time, and when the numerical value calculated in advance by the system is reached, the quality sensing device triggers signals to the driving motor and the discharging device to stop feeding and close the gate. The driving motor and the discharging device are controlled by a system program, so that the gate is opened, and the required ingredients are conveyed to the conveying device and the mixing and stirring device through the discharging device.
As shown in fig. 1, the water supply system comprises a water storage tank, a No. 2 three-way electric valve and a No. 4 pump; no. 4 pump is with pipe connection mixing stirring device and water storage box, and No. 2 tee bend motorised valve is located between No. 4 pump and the mixing stirring device, No. 2 tee bend motorised valve links to each other with external water source in addition with the pipeline. When the water storage tank is lack of water, the No. 2 three-way electric valve closes the valve leading to the mixing and stirring device and opens the valve leading to the external water source; meanwhile, the pump No. 4 is reversely rotated, the water is pumped into the water storage tank, the flow meter No. 3 sends water flow data to a system program, and the water injection progress is calculated by the system so as to be stopped in time.
As shown in fig. 1, the cleaning system comprises a cement cleaning agent storage tank, a No. 3 pump connected with the inner wall cleaning device through a pipeline, and a No. 1 three-way electric valve connected with the No. 3 pump and the cement cleaning agent storage tank through a pipeline; the No. 1 three-way electric valve is connected with the water storage tank through a pipeline. The cement cleaning agent is sprayed to the mixing and stirring device through the No. 3 pump and the inner wall cleaning device, and a cement layer adhered to the inside of the mixing and stirring device can be effectively removed. When the set time is reached, the No. 1 three-way electric valve closes the valve leading to the cement cleaning agent storage tank and opens the valve leading to the water storage tank, and residual cement cleaning agent in the mixing and stirring device is removed by water. The cleaned cement and the residual cement cleaning agent are discharged from the sewage outlet.
As shown in fig. 1, the grouting system comprises a No. 1 grouting machine and a No. 2 grouting machine, wherein the No. 1 grouting machine and the No. 2 grouting machine are respectively connected with a cement distributing valve through pipelines; the No. 1 grouting machine is additionally connected with the water storage tank through a No. 5 pump and a pipeline, and the No. 2 grouting machine is additionally connected with the water storage tank through a No. 6 pump and a pipeline; and a No. 3 electric valve is arranged between the No. 5 pump and the water storage tank, and a No. 4 electric valve is arranged between the No. 6 pump and the pipeline and the water storage tank. 2 the grouter of group has accelerated work efficiency greatly, goes into 2 grouters of group through No. 5 pumps and No. 6 pumps with the water pump of water storage box, can wash the slip casting mouth, avoids the adhesion on cement layer.
As shown in fig. 1, the regulating reagent supply system comprises a water glass supply unit and a chemical liquid supply unit; the chemical liquid storage tank is connected with the mixing and stirring device through a No. 2 pump and a pipeline; be equipped with No. 1 motorised valve between No. 1 pump and the sodium silicate storage jar, be equipped with No. 2 motorised valves between No. 2 pump and the chemical liquid storage jar. The water glass supply unit and the chemical liquid supply unit are used for supplying water glass and chemical liquid, so that cement slurries with different properties can be produced.
As shown in fig. 1, a number 1 flow meter, a number 2 flow meter and a number 3 flow meter for detecting liquid flow dynamics are respectively arranged between the number 1 electric valve and the water glass storage tank, between the number 2 electric valve and the chemical liquid storage tank and between the number 2 three-way electric valve and the water storage tank. The flow change is detected, the allocation accuracy is improved, and the product quality is improved.
When the preparation system works, the feeding valve is opened and the conveying device is started under the control of a system program; when the selected formula is determined, the gate of the selected ingredient storage box is opened by the driving motor and the discharging device is started, the ingredients are sent to the conveying device by the discharging device, and when the quality sensing device detects that the quality meets the standard, a feedback signal is triggered, the gate is closed and the discharging device stops working; the conveying device sends the ingredients into the mixing and stirring device through the feeding valve, and after all the ingredients are sent, the feeding valve is closed. No. 2, a valve communicated with the water storage tank and the mixing and stirring device is opened by the power-on electric valve 3, and the No. 4 pump starts to work and pumps water into the mixing and stirring device; after the No. 3 flowmeter detects that the flow reaches the standard, the triggering signal closes the valves of the No. 4 pump and the No. 2 electric switch valve. After the ingredients are prepared completely, the mixing and stirring device is started, when the time is enough, the cement distributing valve is opened, and the stirred cement slurry is poured through the No. 1 grouting machine and the No. 2 grouting machine.
When the water glass is needed, the No. 1 electric valve opens a valve channel leading to the No. 1 pump and the water glass storage tank, and the No. 1 pump pumps the water glass into the mixing and stirring device; after 1 number flowmeter detected that the flow reached standard, 1 number pump was closed, and 1 number motorised valve accesss to 1 number pump and the valve passage of water glass storage jar and closes. When chemical liquid is needed, the No. 2 electric valve opens a valve channel leading to the No. 2 pump and the chemical liquid storage tank, and the No. 2 pump pumps the chemical liquid into the mixing and stirring device; after 2 the flowmeter detects that the flow reaches standard, 2 the pumps are closed, 2 the motorised valve accesss to 2 the pumps and the valve passage of chemical liquid storage jar is closed. If both are needed, the two steps are operated simultaneously.
When the preparation system needs to be cleaned, the No. 1 three-way electric valve opens a valve channel leading to the cement cleaning agent storage tank and the No. 3 pump, and the No. 3 pump pumps the cement cleaning agent into the inner wall cleaning device; the inner wall cleaning device sprays a cement cleaning agent to the inner wall of the mixing and stirring device through the built-in nozzle to remove a cement layer adhered to the inside of the mixing and stirring device. When reaching the settlement time, 1 # three-way motorised valve closes the valve that leads to cement cleaner storage jar and opens the valve that leads to the water storage box, and 3 # pump is gone into inner wall belt cleaning device with the water pump, clears away remaining cement cleaner in the mixing stirring device, and the cement that washs and remaining cement cleaner are discharged by the drain.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
Claims (9)
1. A mixed grouting preparation system is characterized in that: the preparation system comprises a solid ingredient supply system, a conveying device, a mixing and stirring device, a water supply system, a cleaning system, a grouting system and an adjusting reagent supply system; the top end, the inside and the bottom of the mixing and stirring device are respectively and correspondingly provided with a feeding valve, an inner wall cleaning device and a cement distributing valve, and the cement distributing valve is provided with a drain outlet; the solid ingredient supply system is assembled with the feeding valve through a conveying device, and the water supply system and the regulating reagent supply system are respectively assembled with the mixing and stirring device through pipelines; the cleaning system is connected with the inner wall cleaning device and the water supply system through pipelines, and the grouting system is assembled with the cement distributing valve through pipelines.
2. A hybrid grouting preparation system according to claim 1, characterized in that: the solid ingredient supply system consists of a plurality of groups of supply units for storing different ingredient types, and each group of supply units is matched with the conveying device; each group of supply units comprises a batching storage box, a gate matched with the batching storage box, a driving motor matched with the gate and a discharging device matched with the batching storage box and the conveying device.
3. A hybrid grouting preparation system according to claim 2, characterized in that: the ingredient storage box is provided with a quality sensing device for sensing the dynamic change of ingredients in real time.
4. A hybrid grouting preparation system according to claim 1, characterized in that: the water supply system comprises a water storage tank, a No. 2 three-way electric valve and a No. 4 pump; no. 4 pump is with pipe connection mixing stirring device and water storage box, and No. 2 tee bend motorised valve is located between No. 4 pump and the mixing stirring device, No. 2 tee bend motorised valve links to each other with external water source in addition with the pipeline.
5. A mixed grouting preparation system according to claim 1, 4, characterised in that: the cleaning system comprises a cement cleaning agent storage tank, a No. 3 pump connected with the inner wall cleaning device through a pipeline and a No. 1 three-way electric valve connected with the No. 3 pump and the cement cleaning agent storage tank through a pipeline; the No. 1 three-way electric valve is connected with the water storage tank through a pipeline.
6. A mixed grouting preparation system according to claim 1, 4, characterised in that: the grouting system comprises a No. 1 grouting machine and a No. 2 grouting machine, wherein the No. 1 grouting machine and the No. 2 grouting machine are respectively connected with the cement distributing valve through pipelines; the No. 1 grouting machine is additionally connected with the water storage tank through a No. 5 pump and a pipeline, and the No. 2 grouting machine is additionally connected with the water storage tank through a No. 6 pump and a pipeline; and a No. 3 electric valve is arranged between the No. 5 pump and the water storage tank, and a No. 4 electric valve is arranged between the No. 6 pump and the pipeline and the water storage tank.
7. A hybrid grouting preparation system according to claim 1, characterized in that: the regulating reagent supply system comprises a water glass supply unit and a chemical liquid supply unit; the chemical liquid storage tank is connected with the mixing and stirring device through a No. 2 pump and a pipeline; be equipped with No. 1 motorised valve between No. 1 pump and the sodium silicate storage jar, be equipped with No. 2 motorised valves between No. 2 pump and the chemical liquid storage jar.
8. A mixed grouting preparation system according to claim 4, 7, characterised in that: no. 1 flowmeter, No. 2 flowmeter and No. 3 flowmeter that are used for detecting liquid flow dynamics are equipped with respectively between No. 1 motorised valve and the sodium silicate storage jar, between No. 2 motorised valve and the chemical liquid storage jar and between No. 2 tee bend motorised valve and the water storage box.
9. A mixed grouting preparation system according to claim 1, 7, characterised in that: the preparation system can be additionally provided with a solid ingredient supply system and a water glass supply unit, a solid ingredient supply system and a chemical liquid supply unit, and a chemical liquid supply unit and a water glass supply unit which are coordinated to operate according to requirements, so that mixed products with different effects are produced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010439229.0A CN111571815A (en) | 2020-05-22 | 2020-05-22 | Mixed grouting preparation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010439229.0A CN111571815A (en) | 2020-05-22 | 2020-05-22 | Mixed grouting preparation system |
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| CN111571815A true CN111571815A (en) | 2020-08-25 |
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| CN202010439229.0A Pending CN111571815A (en) | 2020-05-22 | 2020-05-22 | Mixed grouting preparation system |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812994A (en) * | 2010-03-09 | 2010-08-25 | 上海真砂隆福机械有限公司 | Synchronous grouting system |
| CN103953365A (en) * | 2014-05-20 | 2014-07-30 | 中铁四局集团有限公司 | Single/double slurry alternated grouting reinforcement technology of tunnel and device of single/double slurry alternated grouting reinforcement technology |
| CN209718185U (en) * | 2018-10-17 | 2019-12-03 | 张宏强 | A kind of cement mixer with inner-wall cleaning device |
| CN110671130A (en) * | 2019-10-25 | 2020-01-10 | 王志杰 | Operation method of double-liquid mixed grouting preparation system |
| CN210256740U (en) * | 2018-11-13 | 2020-04-07 | 辽宁工程技术大学 | Grouting process auxiliary equipment |
| CN210414974U (en) * | 2019-05-06 | 2020-04-28 | 中铁七局集团有限公司 | Automatic cement paste mixing system |
| CN210453255U (en) * | 2019-05-13 | 2020-05-05 | 北京中煤矿山工程有限公司 | Intelligent automatic pulping station |
-
2020
- 2020-05-22 CN CN202010439229.0A patent/CN111571815A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812994A (en) * | 2010-03-09 | 2010-08-25 | 上海真砂隆福机械有限公司 | Synchronous grouting system |
| CN103953365A (en) * | 2014-05-20 | 2014-07-30 | 中铁四局集团有限公司 | Single/double slurry alternated grouting reinforcement technology of tunnel and device of single/double slurry alternated grouting reinforcement technology |
| CN209718185U (en) * | 2018-10-17 | 2019-12-03 | 张宏强 | A kind of cement mixer with inner-wall cleaning device |
| CN210256740U (en) * | 2018-11-13 | 2020-04-07 | 辽宁工程技术大学 | Grouting process auxiliary equipment |
| CN210414974U (en) * | 2019-05-06 | 2020-04-28 | 中铁七局集团有限公司 | Automatic cement paste mixing system |
| CN210453255U (en) * | 2019-05-13 | 2020-05-05 | 北京中煤矿山工程有限公司 | Intelligent automatic pulping station |
| CN110671130A (en) * | 2019-10-25 | 2020-01-10 | 王志杰 | Operation method of double-liquid mixed grouting preparation system |
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Application publication date: 20200825 |
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