Dry mortar storage and mixing equipment for shield construction

Abstract

The present invention provides a set of equipment for storing and mixing dry mortar for shield construction. The set of equipment includes a mortar mixing system and a wastewater recovery tank surrounding the mortar mixing system. The mortar mixing system includes a storage tank, a screw conveyor, a weighing feed hopper, a mixing tank, and a water reservoir. The storage tank is used to store finished or mixed dry mortar solid materials. A feed pipe and an exhaust pipe are provided at the top of the tank body, a discharge port is provided at the bottom of the tank body, a vibrator is provided on the outside of the tank body, and a material drop chute is provided on the inner wall of the tank body. The weighing feed hopper is provided at the mixing tank feed port to control the amount of dry mortar fixed material entering the mixing tank. The screw conveyor connects the storage tank and the weighing feed hopper. The water reservoir stores water for mixing mortar and cleaning equipment. The present invention avoids problems such as pipeline blockage and inaccurate mortar proportioning during the transportation of mortar materials, and also improves the environmental friendliness of the mortar mixing station production process.

Description

Technical Field

[0001] The present invention belongs to the technical field of underground engineering construction, and specifically is a dry mortar mixing station for storing and mixing dry mortar for shield construction, which mainly provides mortar for filling building gaps behind shield construction segments. Background Art

[0002] Mortar refers to a mixture formed by measuring and mixing a certain proportion of cement, sand, water and other materials. Mortar can be used for construction operations such as masonry and plastering. During the shield construction of the subway, mortar is also needed to fill the building gaps behind the pipe segments. The mortar currently used in shield construction can be provided in two ways: purchased commercial mortar or self-mixed mortar, but both require mortar mixing station equipment.

[0003] Existing mortar mixing plants consist of a sand conveying system, a powder conveying system, a mixing system, and a control system. The sand conveying system includes a belt conveyor, which includes a belt support and conveyor belt. The powder conveying system includes a powder storage tank and a powder conveying pipeline. The mixing system includes a main mixer with a mixing chamber equipped with a stirring mechanism. The control system controls the entire mortar mixing plant. Typically, the mixing system and control system are integrated and housed on a main mixing tower supported by a support. The mortar preparation and supply process in this mortar mixing plant is as follows: sand accumulated in an open area is metered by a metering device and then transported to the mixing chamber by an exposed conveyor belt, ensuring the supply of the required sand. Cement and other powders are transported to the mixing station area by specialized powder transport vehicles. Pneumatic conveying devices then store them in powder tanks before transporting them to the mixing chamber via a powder conveying pipeline. The mixing chamber then produces mortar from these raw materials.

[0004] At present, the following problems often occur in the use of mortar mixing stations: (1) The storage tank device is only designed with a feed pipe and no exhaust pipe. The air compression in the tank makes it difficult to pump the material, and the powder material becomes compacted in the tank, causing the tank to be blocked and the material transportation to be blocked; (2) The material height inside the storage tank is reflected by devices such as pressure sensors, which are expensive and the data is inaccurate; (3) The mortar operating table is manually controlled and calculated, and the material ratio does not meet the design requirements; (4) When using the purchased finished dry-mixed mortar materials, the entire dry-mixed mortar material will be transported to a whole storage tank. Mortar materials are prone to segregation due to different densities; (5) a large amount of dust will be generated during the material transportation process, and sewage will be discharged during the mortar mixing process, which will cause serious pollution to the construction site environment; many mixing stations are easily polluted during the production process, and are built in towns or urban-rural fringe areas far away from the construction site. Mortar mixing stations are usually between 10 and 50 kilometers away from the construction site. The prepared mortar is transported to the construction site by special mixing trucks. The long transportation distance not only increases the mortar supply cost, but also reduces the quality of the mortar during transportation. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a set of dry mortar storage and mixing equipment for shield construction. In combination with the actual construction site and taking into account the constraints of on-site conditions, a storage tank is designed that can store finished dry mortar materials or dry mortar materials prepared off-site. Combined with the design of conveying pipes, water collection tanks, weighing buckets, vibrators, etc., it avoids problems such as pipeline blockage and inaccurate mortar ratios during the transportation of mortar materials, and can also improve the environmental friendliness of the mortar mixing station production process.

[0006] In order to achieve the above technical effects, the present invention provides a set of dry mortar storage and mixing equipment for shield construction, including a mortar mixing system and a wastewater recovery system. The wastewater recovery system includes a wastewater recovery tank surrounding the mortar mixing system and a water outlet filter pool provided at the wastewater recovery tank.

[0007] The mortar mixing system includes a storage tank, a screw conveyor, a weighing feed hopper, a mixing tank and a water reservoir; the storage tank is used to store finished products or mixed dry mortar solid materials, and includes a tank body on the feeding side of the mixing tank supported by legs, a feed pipe and an exhaust pipe are provided on the top of the tank body, a discharge port is provided at the bottom of the tank body, a vibrator is provided on the outside of the tank body, and a material falling chute is provided on the inner wall of the tank body, the material falling chute spirally winds from the tank port of the tank body along the pipe wall to the bottom of the tank, the discharge port of the feed pipe is opposite to the feed port at the upper end of the material falling chute, the exhaust pipe extends from the top of the tank body to the ground, and the outlet end of the exhaust pipe leads to the wastewater recovery tank;

[0008] The weighing feed hopper is arranged at the feed port of the mixing tank, and is used to control the amount of dry-mixed mortar solid material entering the mixing tank. The feed end of the screw conveyor is connected to the discharge port of the storage tank, and the discharge end is connected to the weighing feed hopper; the water reservoir is connected to the water inlet of the mixing tank through an outlet pipe, and a temporary slurry storage tank is connected to the discharge port of the mixing tank. A sewage outlet is provided at the bottom of the mixing tank, and the sewage outlet leads to a wastewater recovery tank.

[0009] The preferred technical solution of the present invention: the temporary slurry storage tank is connected to the middle plate slurry storage tank or the electric locomotive mortar tank through a mortar conveying pipeline, and a pipeline cleaning device is provided on the mortar conveying pipeline; the pipeline cleaning device includes a clean water pipe connected to the water reservoir, a clean water pump arranged on the clean water pipe, a cleaning water pipe arranged in the temporary slurry storage tank and a sewage pipe connected to the mortar conveying pipeline, the cleaning water pipe is arranged in a ring shape on the top of the temporary slurry storage tank, the water inlet of the cleaning water pipe is connected to the clean water pipe, and a plurality of water spray heads are dispersedly arranged on the cleaning water pipe; the mortar conveying pipeline is connected to the sewage pipe through a three-way joint, the third interface of the three-way joint is connected to the mortar conveying branch pipe, and leads to the middle plate slurry storage tank or the electric locomotive mortar tank through the mortar conveying branch pipe.

[0010] The preferred technical solution of the present invention: the dry mortar mixing system also includes an automatic control system, which includes a control console, a material level sensor arranged at the top of the storage tank, a first solenoid valve arranged at the discharge port of the storage tank, a second solenoid valve arranged on the water outlet pipe, and a feed solenoid valve arranged on the feed pipe; the control console is connected to the material level sensor, the first solenoid valve, the second solenoid valve, the feed solenoid valve, the screw feeder, the vibrator, the clean water pump, and the weighing feed hopper signal; there are two material level sensors, which are mainly used to determine whether the storage tank is full, that is, to add materials to the storage tank through a material transport vehicle. The storage tank is a closed space and is at a high height, which is not convenient for observation, so this sensing device is installed to stop filling when it is full.

[0011] The better technical solution of the present invention is as follows: there are two vibrators, which are symmetrically arranged on both sides of the tank body of the storage tank through a winding mechanism, and a slide is correspondingly provided on the side wall of the tank body of the storage tank. The vibrator is embedded in the slide through a sliding base, and the winding mechanism includes a dual-axis motor and a winding roller arranged on the output shafts at both ends of the dual-axis motor. The two vibrators are connected to the winding mechanism through winding wire ropes, one end of the two winding wire ropes is respectively fixed on the two winding rollers, and after winding along the winding rollers, they are respectively wound around the fixed pulleys fixed on both sides of the winding mechanism and connected to the vibrator on the corresponding side, and the winding directions of the two wire ropes are opposite. Under the control of the dual-axis motor, the two vibrators slide in the same direction along the corresponding slide at the same time.

[0012] A better technical solution of the present invention is that the storage tank is a sealed tank body with an inspection port on the tank body and a ladder on the side of the tank body. A plurality of windproof cables are arranged around the tank body, and the bottoms of the windproof cables are fixed to the ground.

[0013] The better technical solution of the present invention is: the wastewater recovery tank is a U-shaped water tank, the side of which is adjacent to the mortar mixing system is higher than the outside, and drainage ditches leading to the wastewater recovery tank are provided below the sewage outlets of the storage tank and the mixing tank; the filter tank is arranged at a position lower than the wastewater recovery tank, and the wastewater recovered in the wastewater recovery tank is gathered into the filter tank; the filter tank is connected to the mixing tank through a sewage pump and a circulating water pipe, and the filtered water can be led to the mixing tank for stirring or cleaning. A multi-stage filter screen is provided at the water inlet of the filter tank, and the sewage pump is placed in the filter tank.

[0014] The better technical solution of the present invention is: a plurality of fixed pipe clamps are provided on the side of the storage tank, and the feed pipe and the exhaust pipe both extend vertically downward along the tank body of the storage tank to the bottom of the tank body, and are fixed to the outer wall of the tank body by fixed pipe clamps, and the feed pipe is connected to the material truck, and the exhaust pipe extends to the wastewater recovery tank.

[0015] The preferred technical solution of the present invention is as follows: the temporary slurry storage tank is an open tank body, a stirring shaft is provided in the tank body, the motor of the stirring shaft is fixed to the open surface of the tank body through a fixing frame, the stirring shaft extends vertically to the bottom of the tank, and a plurality of stirring blades are distributed on the stirring shaft from top to bottom, the stirring blades are staggered, a water inlet joint connected to the clean water pipe is provided at the upper part of the temporary slurry storage tank, a discharge port is provided at the bottom, the discharge port is connected to the mortar conveying pipeline, the sewage pipe leads to the waste water tank, and a third solenoid valve is provided on the sewage pipe and the mortar conveying branch pipe respectively; the water spray heads are equidistantly distributed on the annular cleaning water pipe, and the water spray ports are facing the center of the tank body, and the console is connected to the two third solenoid valve signals.

[0016] The preferred technical solution of the present invention is as follows: the weighing hopper includes a support frame, a hopper and a weighing device, the weighing device is fixed on the support frame, the hopper is suspended under the weighing device by a hanging rope, the discharge port of the hopper is provided with a sealing heavy ball, and the sealing heavy ball is controlled to rise and fall by a lifting mechanism, thereby opening or closing the discharge port of the hopper; the control motors of the weighing device and the lifting mechanism are both connected to the control console signal.

[0017] A better technical solution of the present invention: the water reservoir is an uncovered rectangular structure, with a water inlet pipe and a water outlet pipe correspondingly provided, a flow meter is provided on the outlet pipe connecting the water reservoir and the mixing tank, and the flow meter is connected to the control console signal.

[0018] Beneficial effects of the present invention:

[0019] (1) The present invention designs a storage tank specifically for storing finished dry-mix slurry materials or dry-mix slurry materials prepared by oneself. The purchased finished dry-mix slurry materials or dry-mix slurry prepared off-site can be directly transported to the construction site and enter the tank through the feed pipe. In combination with the screw conveyor, the weighing hopper and the mixing tank, a complete set of well-enclosed mixing system is formed, which avoids the dust generated during the sand and powder transportation process from polluting the construction environment;

[0020] (2) The storage tank of the present invention is designed with a feed pipe and an exhaust pipe to balance the volume, and the dust generated by the exhaust pipe is collected in the sump, which is environmentally friendly and hygienic. A position sensing device is also designed inside the storage tank body, which transmits signals through the distance between the material and the sensor, and can accurately sense the height of the material in the tank body;

[0021] (3) The slurry storage tank of the present invention is designed with a material chute. The material can move downward along the chute after entering the tank body, and the separation of light and heavy media is not easy to occur. A vibrator is designed along the tank body to better avoid compaction and evacuation after compaction, and prevent blockage during material transportation.

[0022] (4) The stirring system of the present invention is designed with a cleaning pipeline and a ring pipeline, which can be used to clean the stirring system. At the same time, the pipeline is designed with a tee to collect impurities. The present invention also provides centralized collection of wastewater for repeated recycling, and the level of civilized construction is high;

[0023] (5) The mortar control console in the present invention is divided into manual and automatic modes according to the mixing mode, which can realize automatic mixing; different mortars can be mixed according to different needs; the mortar station water tank is designed with a liquid level control valve to automatically store water without human intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a control flow diagram in the present invention;

[0026] Figure 3 It is a structural schematic diagram of the storage tank in the present invention;

[0027] Figure 4 It is a top view of the storage tank in the present invention;

[0028] Figure 5 This is a schematic diagram of the distribution of material falling chutes on the inner wall of the storage tank in the present invention;

[0029] Figure 6 It is a schematic diagram of the internal structure of the temporary slurry storage tank in the present invention;

[0030] Figure 7It is a top view of the temporary slurry storage tank in the present invention;

[0031] Figure 8 This is a plan view of the layout of the cleaning water pipes of the temporary slurry storage tank in the present invention;

[0032] Figure 9 is a cross-sectional view of the stirring area of ​​the temporary slurry storage tank in the present invention;

[0033] Figure 10 This is a schematic diagram of the structure of the weighing hopper in the present invention in a closed state;

[0034] Figure 11 This is a schematic diagram of the structure of the weighing hopper discharging state in the present invention;

[0035] Figure 12 It is a schematic structural diagram of the wastewater recovery tank in the present invention.

[0036] In the figure: 1 - storage tank, 100 - tank body, 101 - feed pipe, 102 - exhaust pipe, 103 - discharge port, 104 - support leg, 105 - material drop chute, 106 - first solenoid valve, 107 - vibrator, 108 - material level sensor, 109 - windproof cable, 110 - fixed pipe clamp, 111 - slideway, 112 - rewinding mechanism, 113 - rewinding wire rope, 114 - fixed pulley, 115 - ladder, 2 - screw conveyor, 3 - weighing feed hopper, 300 - support frame, 301 - hopper, 302 - weigher, 303 - lifting rope, 304 - heavy-duty ball for sealing, 305 - lifting mechanism, 4 - flow meter, 5 - mixing tank, 6 - water reservoir, 7 - wastewater recovery Trough, 8—filter tank, 800—filter screen, 9—temporary slurry storage tank, 10—outlet pipe, 11—control console, 12—sewage pump, 13—circulating water pipe, 14—mortar delivery pipeline, 15—middle plate slurry storage tank or electric locomotive mortar tank, 16—clean water pump, 17—clean water pipe, 18—cleaning water pipe, 19—sprinkler head, 20—drain pipe, 21—second solenoid valve, 22—tee joint, 23—mortar delivery branch pipe, 24—third control valve, 25—wastewater tank. DETAILED DESCRIPTION

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments. Figures 1 to 12 The accompanying drawings are simplified versions of the embodiments and are only used to clearly and concisely illustrate the embodiments of the present invention. The technical solutions shown in the accompanying drawings are specific solutions of the embodiments of the present invention and are not intended to limit the scope of the invention claimed for protection. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is typically placed when in use, or are the directions or positional relationships commonly understood by those skilled in the art. These terms are intended only to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also mean internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0040] The embodiment provides a dry mortar storage and mixing equipment for shield construction, such as Figure 1As shown, it includes a mortar mixing system and a wastewater recovery system, the wastewater recovery system includes a wastewater recovery tank 7 surrounding the mortar mixing system and a water outlet filter tank 8 arranged at the wastewater recovery tank 7, the mortar mixing system includes a storage tank 1, a screw conveyor 2, a weighing feed hopper 3, a mixing tank 5, a water reservoir 6 and a temporary slurry storage tank 9; the storage tank 1 is used to store finished products or mixed dry mortar solid materials, and a feed pipe 101 and an exhaust pipe 102 are provided on the top of the tank body 100, through The feed pipe 101 is connected to the material transport. The material transport vehicle is an existing mortar dry material transport device and has its own feed pump and feed pipe. The feed pipe 101 is connected to the feed pipe of the material transport vehicle through a pipe joint. The material on the vehicle can be transported to the storage tank 1 through the feed pump of the material transport vehicle. At the same time, the exhaust pipe 102 extends to the wastewater recovery tank 7, and the exhaust gas is discharged to the wastewater recovery tank 7 through the volume principle. That is to say, the volume of the tank is fixed. If the bottom is filled with material, the air above will be squeezed out. The weighing feed hopper 3 is arranged at the feed port of the mixing tank 5, and is used to control the amount of dry-mixed mortar solid material entering the mixing tank 5, and is used to control the ratio of dry-mixed mortar to water; the screw conveyor 2 is used to transport materials between the storage tank 1 and the weighing hopper 3, and the screw conveyor 2 adopts an existing general screw machine, and its feed end is connected to the discharge port 103 of the storage tank 1, and the discharge end is connected to the weighing feed hopper 3; the water reservoir stores water for mixing mortar and cleaning equipment. The water reservoir 6 is an uncovered rectangular structure, and an inlet pipe and an outlet pipe are correspondingly provided. The water reservoir 6 is connected to the water inlet of the mixing tank 5 through the outlet pipe 10. The temporary slurry storage tank 9 is used to store the mixed mortar, and the temporary slurry storage tank 9 is connected to the discharge port of the mixing tank 5; a sewage outlet is provided at the bottom of the mixing tank 5, and the sewage outlet leads to the wastewater recovery tank 7.

[0041] The dry mortar storage and mixing equipment for shield construction provided in the embodiment is as follows: Figure 1 As shown, the temporary slurry storage tank 9 is connected to the middle plate slurry storage tank or the electric locomotive mortar tank 15 through a mortar conveying pipeline 14, and a pipeline cleaning device is provided on the mortar conveying pipeline 14; the pipeline cleaning supporting device is used to clean the mortar in the temporary slurry storage tank 9 and the mortar conveying pipeline 14. The pipeline cleaning device includes a clean water pipe 17 connected to the water reservoir, a clean water pump 16 arranged on the clean water pipe 17, a cleaning water pipe 18 arranged in the temporary slurry storage tank 9 and a sewage pipe 20 connected to the mortar conveying pipeline 14. The cleaning water pipe 18 is arranged in a ring shape on the top of the temporary slurry storage tank 10, the water inlet of the cleaning water pipe 18 is connected to the clean water pipe 17, and a plurality of sprinkler heads 19 are dispersedly arranged on the cleaning water pipe 18; the mortar conveying pipeline 14 is connected to the sewage pipe 20 through a three-way joint 22, the third interface of the three-way joint 22 is connected to the mortar conveying branch pipe 23, and leads to the middle plate slurry storage tank or the electric locomotive mortar tank 15 through the mortar conveying branch pipe 23.

[0042] The dry mortar storage and mixing equipment for shield construction provided in the embodiment is as follows: Figures 3 to 5 As shown, the storage tank 1 includes a tank body 100 on the feeding side of the mixing tank 5 supported by a support leg 104. The tank body 100 is a three-dimensional sealed tank with an inspection port on the tank body and a ladder 115 on the side of the tank body for maintenance personnel to pass through in abnormal situations. At the same time, in order to prevent the influence of adverse weather such as strong winds and thunderstorms, a plurality of windproof cables 109 are provided around the tank body 100. The bottom of the windproof cable 109 is fixed to the ground, and a lightning rod is also provided on the tank body. A feed port connected to a feed pipe 101 and an exhaust port connected to an exhaust pipe 102 are provided at the top of the tank body 100, and a discharge port 103 is provided at the bottom of the tank body 100. A plurality of fixed pipe clamps 110 are provided on the side of the storage tank 1. The feed pipe 101 and the exhaust pipe 102 both extend vertically downward along the tank body 100 to the bottom of the tank body and are fixed to the outer wall of the tank body by fixed pipe clamps 110. The outlet end of the exhaust pipe 102 leads to the wastewater recovery tank 7. A material drop chute 105 is provided on the inner wall of the tank body 100. The material drop chute 105 spirals along the pipe wall from the tank mouth of the tank body 100 to the tank bottom. The discharge port of the feed pipe 101 faces the feed port at the upper end of the material drop chute 105. Once the material enters the tank body, it can move downward along the material drop chute 105, automatically falling without relying on gravity, and the separation of light and heavy media will not occur, thus better maintaining the stability of the material. In order to prevent the material in the tank from being hardened due to long-term accumulation, weather reasons, etc., a vibrator 107 is arranged on the outside of the tank body. The vibrator 107 is provided with two, which are symmetrically arranged on both sides of the tank body 100 through a winding mechanism 112. A slide 111 is correspondingly provided on the side wall of the tank body 100 of the storage tank. The vibrator 107 is embedded in the slide 111 through a sliding base. The winding mechanism 112 includes a double-axis motor and a winding roller arranged at both ends of the double-axis motor output shaft. The two vibrators 107 are provided with a plurality of winding rollers. 07 are connected to the winding mechanism 112 through winding wire ropes 113 respectively. One end of the two winding wire ropes 113 are fixed on the two winding rollers respectively. After winding along the winding rollers, they are respectively wound around the fixed pulleys 114 fixed on both sides of the winding mechanism 112 and connected to the vibrator 107 on the corresponding side. The winding directions of the two wire ropes are opposite. Under the control of the dual-axis motor, the two vibrators 107 move upward or downward along the corresponding slide 111 at the same time, which can vibrate the entire tank body.

[0043] The dry mortar storage and mixing equipment for shield construction provided in the embodiment is as follows: Figures 6 to 9As shown, the temporary slurry storage tank 9 is an open tank body, and a stirring shaft 900 is provided in the tank body. The motor of the stirring shaft 900 is fixed to the open surface of the tank body through a fixing frame 901. The stirring shaft 900 extends vertically to the bottom of the tank, and a plurality of stirring blades 902 are distributed on the stirring shaft 900 from top to bottom. The stirring blades 902 are staggered. A water inlet joint 903 connected to the clean water pipe 17 is provided at the upper part of the temporary slurry storage tank 9, and a discharge port 904 is provided at the bottom. The discharge port 904 is connected to the mortar conveying pipeline 14, and the sewage pipe 20 leads to the waste water tank 25, and a third solenoid valve 24 is provided in the sewage pipe 20 and the mortar conveying branch pipe 23 respectively; the water spray heads 19 are equidistantly distributed on the annular cleaning water pipe 18, and the water spray ports are facing the center of the tank body. The mortar in the tank body can be cleaned by the annular cleaning water pipe 18 and the water spray heads 19.

[0044] The dry mortar storage and mixing equipment for shield construction provided in the embodiment is as follows: Figure 12 As shown, the wastewater recovery tank 7 is a U-shaped water tank, the side of which is adjacent to the mortar mixing system is higher than the outside, and drainage ditches leading to the wastewater recovery tank 7 are provided below the sewage outlets of the storage tank 1 and the mixing tank 5. The wastewater recovery tank 7 is used for dust collection of the storage tank exhaust pipe and sewage discharge and sedimentation on site; the sewage on site can flow directly into the wastewater recovery tank, which is convenient for secondary recycling of sewage and civilized construction on site. The filter tank 8 is set at a position lower than the wastewater recovery tank 7, and the wastewater recovered in the wastewater recovery tank 7 is collected in the filter tank 8. The filter tank 8 is connected to the mixing tank 5 through a sewage pump 12 and a circulating water pipe 13. The treated sewage can enter the mixing tank 5 for reuse. Control valves can be set on the connecting pipelines. A three-stage filter screen 800 is set at the water inlet of the filter tank 8 to collect and reuse impurities of different particle sizes. The sewage pump 12 is placed in the last layer of the clear water tank of the filter tank 8.

[0045] The dry mortar storage and mixing equipment for shield construction provided in the embodiment is as follows: Figure 10 and Figure 11 As shown, the weighing hopper 3 includes a support frame 300, a hopper 301 and a weighing device 302. The weighing device 302 is fixed on the support frame 300. The hopper 301 is suspended below the weighing device 302 by a suspension rope 303. The discharge port of the hopper 301 is provided with a sealing heavy ball 304. The spherical sealing has a better sealing effect, and a sealing cover can also be provided; the sealing heavy ball 304 is controlled to rise and fall by a lifting mechanism 305, thereby opening or closing the discharge port of the hopper 301. The lifting mechanism 305 can adopt an existing lifting mechanism such as a crane or a lifting motor.

[0046] In order to realize automatic control, the dry mortar mixing system of the present invention further comprises an automatic control system. Figure 1 and Figure 2 As shown, the system includes a control console 11, a material level sensor 108 located at the top of the storage tank 1, a first solenoid valve 106 located at the tank discharge port 103, a second solenoid valve 21 located on the outlet pipe 10, a feed solenoid valve 116 located on the feed pipe 101, and a flowmeter 4 located on the outlet pipe 10 connecting the water reservoir 6 and the mixing tank 5. The control console 11 is connected to a signal source. The control console 11 is respectively connected to the material level sensor 108, the first solenoid valve 106, the second solenoid valve 21, the feed solenoid valve 116, the screw conveyor 2, the vibrator 107, the clean water pump 16, the flowmeter 4, the weighing device 302, the lifting mechanism 305, and the two third solenoid valves 24. The control console 11 can automatically control the entire system. The material level sensor 108 is used to monitor the material in the storage tank 1. When the material reaches the set value, it transmits a signal to the control console 11, which controls the feed solenoid valve 116 to close, stopping further feeding. The ratio of dry-mixed mortar solids to water can be set in the control console 11, and then the water intake can be controlled by the flow meter 4. The dry-mixed mortar solids entering the weighing hopper can be controlled by the weighing device 302. When the dry-mixed mortar solids reach the designed amount, the control console 11 controls the lifting mechanism 305 to lift the sealing heavy ball 304 to open the discharge port of the hopper 301, and add an accurate amount of dry-mixed mortar solids to the mixing tank 5 to ensure that the ratio of dry-mixed mortar solids to water is accurate and the quality of the mixed slurry is guaranteed. When the water intake reaches the designed requirement, the control console 11 controls the second solenoid valve 21 to close, stop the water intake, and simultaneously controls the first solenoid valve 106 and the screw feeder 2 to close, stop conveying the dry-mixed mortar solids. When the storage tank 1 becomes compacted, the vibrator 107 can be controlled by the control console 11 to vibrate the tank body. When the temporary slurry storage tank 9 needs to be cleaned, the switch valve on the clean water pipe 17 can be opened, the clean water pump 16 can be controlled to work through the control console 11, the third solenoid valve on the sewage pipe 20 can be controlled to open, and the third solenoid valve on the mortar delivery branch pipe 23 can be closed to clean the temporary slurry storage tank 9; during the normal slurry stirring process, the third solenoid valve on the sewage pipe 20 is closed, and the third solenoid valve on the mortar delivery branch pipe 23 is opened to transport the slurry toward the underground middle plate slurry storage tank or the electric locomotive mortar tank 15 for on-site construction.

[0047] In the present invention, the dry mortar solid materials transported to the storage tank 1 include fly ash, cement, slaked lime, bentonite, and yellow sand, which are mixed according to the mix ratio; then, corresponding water is added according to the mortar consistency requirements, and the mortar is fully stirred in the mixing tank 5 and stored in the temporary mortar storage tank 9. When the transportation conditions are met or the site can be directly transported, it is transported to the construction site for use. The specific mixing process is as follows:

[0048] (1) After the transport truck transports the dry mortar solid materials to the mixing station, the pump truck pipeline is connected to the feed pipe 101 of the storage tank 1, and the pump truck power system is started to transport the dry mortar solid materials along the feed pipe 101 into the storage tank 1. At the same time, the bottom end of the exhaust pipe 102 is inserted into the wastewater recovery tank 7, and a large amount of dust generated in the tank body is discharged into the water through the exhaust pipe 102 and dissolved;

[0049] (2) During the mortar mixing process, the dry mortar solid material is transported from the storage tank 1 to the weighing feed hopper 3 through the screw conveyor 2. After the weighing device above the weighing feed hopper 3 shows that the mixing weight meets the requirements, the lifting mechanism controls the sealing heavy ball 304 to open the discharge port and place the material into the mixing tank 5;

[0050] (3) According to the mortar ratio calculation formula, the weight of the dry-mixed mortar solid material is input to calculate the weight or volume of water to be added, and then the water inlet is controlled by the flow meter 4. After the addition is completed, stir it thoroughly and store it in the temporary slurry storage tank 9 after it is mixed to meet the requirements.

[0051] The size and quantity of the storage tanks 1 are configured according to the construction requirements, generally ensuring that the construction needs of 2 days are met.

[0052] The present invention can be divided into two modes: automatic and manual. The console 11 is provided with a display screen and control buttons. The specific control and operation are as follows:

[0053] (1) Automatic mode

[0054] ① Input the mortar mix ratio (K). The dry-mix mortar solid materials and water are calculated according to the model of Y=Kx+b;

[0055] ② The values ​​of X and Y increase according to the multiple of the mortar mixing volume. The specific values ​​depend on the input value of the volume.

[0056] ③The number of cycles is input according to production demand and the remaining quantity of materials;

[0057] ④ During the automatic mixing process, low-level material level sensors can be set in the storage tank 1, the mixing tank 5 and the temporary slurry storage tank 9, and the low-level material level sensors can be used to determine that the tank body cannot be empty. The sensor of the mixing tank 5 determines that the mortar has been transferred to the temporary slurry storage tank 9 after the last mixing is qualified; the sensor of the temporary slurry storage tank 9 determines that the current liquid level meets the requirements for slurry storage after the next mixing.

[0058] ⑤ Press the start button after the logical judgment meets the conditions. It will automatically stop and issue a prompt sound when any of the above conditions are met. If the number of cycles is met, it will enter the cleaning mode to clean the corresponding equipment and keep it clean.

[0059] (2) Manual mode

[0060] ① Input the dry mortar volume X and the additive weight b, and calculate the water volume according to the model Y=Kx+b;

[0061] ② After the input is completed, press the start button, and after the stirring is qualified, press the stop button. When the stirring is completed and ready to stop, press the cleaning button to enter the cleaning mode, clean the corresponding equipment, and keep it clean.

[0062] The above is merely one embodiment of the present invention, and its description is relatively specific and detailed. However, it should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A set of equipment for storing and mixing dry mortar for shield construction, characterized by: The complete set of equipment includes a mortar mixing system and a wastewater recovery system. The wastewater recovery system includes a wastewater recovery tank surrounding the mortar mixing system and a water outlet filter pool arranged in the wastewater recovery tank. The mortar mixing system includes a storage tank, a screw conveyor, a weighing feed hopper, a mixing tank and a water reservoir. The storage tank is used to store finished products or mixed dry mortar solid materials, including a tank body on the feeding side of the mixing tank supported by legs, a feed pipe and an exhaust pipe on the top of the tank body, a discharge port at the bottom of the tank body, a vibrator on the outside of the tank body, and a material drop chute on the inner wall of the tank body. The material drop chute is discharged from the tank body of the tank The outlet of the feed pipe is spirally wound along the pipe wall to the bottom of the tank, the outlet of the feed pipe is opposite to the feed port at the upper end of the material falling chute, the exhaust pipe extends from the top of the tank body to the ground, and the outlet end of the exhaust pipe leads to the wastewater recovery tank; the weighing feed hopper is arranged at the feed port of the mixing tank, which is used to control the amount of dry mortar solid material entering the mixing tank, the feed end of the screw conveyor is connected to the discharge port of the storage tank, and the discharge end is connected to the weighing feed hopper; the water reservoir is connected to the water inlet of the mixing tank through the outlet pipe, and a temporary slurry storage tank is connected to the outlet of the mixing tank. A sewage outlet is provided at the bottom of the mixing tank, and the sewage outlet leads to the wastewater recovery tank; The temporary slurry storage tank is connected to the middle plate slurry storage tank or the electric locomotive mortar tank through a mortar delivery pipeline, and a pipeline cleaning device is provided on the mortar delivery pipeline; the pipeline cleaning device includes a clean water pipe connected to the water reservoir, a clean water pump arranged on the clean water pipe, a cleaning water pipe arranged in the temporary slurry storage tank and a sewage pipe connected to the mortar delivery pipeline, the cleaning water pipe is arranged in a ring shape on the top of the temporary slurry storage tank, the water inlet of the cleaning water pipe is connected to the clean water pipe, and a plurality of water spray heads are dispersedly arranged on the cleaning water pipe; the mortar delivery pipeline is connected to the sewage pipe through a tee joint, the third interface of the tee joint is connected to the mortar delivery branch pipe, and leads to the middle plate slurry storage tank or the electric locomotive mortar tank through the mortar delivery branch pipe; Two vibrators are provided, which are symmetrically arranged on both sides of the tank body of the storage tank through a winding mechanism, and a slide is correspondingly provided on the side wall of the tank body of the storage tank. The vibrator is embedded in the slide through a sliding base, and the winding mechanism includes a dual-axis motor and a winding roller arranged on the output shafts at both ends of the dual-axis motor. The two vibrators are connected to the winding mechanism through a winding wire rope, one end of the two winding wire ropes is respectively fixed on the two winding rollers, and after winding along the winding rollers, they are respectively wound around the fixed pulleys fixed on both sides of the winding mechanism and connected to the vibrator on the corresponding side, and the winding directions of the two wire ropes are opposite. Under the control of the dual-axis motor, the two vibrators slide in the same direction along the corresponding slide at the same time; The weighing feed hopper includes a support frame, a hopper and a weighing device. The weighing device is fixed on the support frame. The hopper is suspended under the weighing device by a lifting rope. The discharge port of the hopper is provided with a sealing heavy ball. The sealing heavy ball is controlled by a lifting mechanism to open or close the discharge port of the hopper.

2. The dry mortar storage and mixing equipment for shield construction according to claim 1 is characterized in that: The dry mortar mixing system also includes an automatic control system, which includes a control console, a material level sensor arranged at the top of the storage tank, a first solenoid valve arranged at the discharge port of the storage tank, a second solenoid valve arranged on the water outlet pipe, and a feed solenoid valve arranged on the feed pipe; the control console is connected to the material level sensor, the first solenoid valve, the second solenoid valve, the feed solenoid valve, the screw feeder, the vibrator, the clean water pump, the weighing device and the control motor signal of the lifting mechanism.

3. The dry mortar storage and mixing equipment for shield construction according to claim 1 or 2, characterized in that: The storage tank is a sealed tank body with an inspection port on the tank body and a ladder on the side of the tank body. There are multiple windproof cables around the tank body, and the bottom of the windproof cables is fixed to the ground.

4. The dry mortar storage and mixing equipment for shield construction according to claim 1 or 2, characterized in that: The wastewater recovery tank is a U-shaped water tank, the side of which is adjacent to the mortar mixing system is higher than the outside, and drainage ditches leading to the wastewater recovery tank are provided under the sewage outlets of the storage tank and the mixing tank; the filter tank is arranged at a position lower than the wastewater recovery tank, and the wastewater recovered in the wastewater recovery tank is collected in the filter tank; the filter tank is connected to the mixing tank through a sewage pump and a circulating water pipe, and a multi-stage filter screen is provided at the water inlet of the filter tank, and the sewage pump is placed in the filter tank.

5. The dry mortar storage and mixing equipment for shield construction according to claim 1 or 2, characterized in that: There are multiple fixed pipe clamps on the side of the storage tank. The feed pipe and exhaust pipe extend vertically downward along the tank body to the bottom of the tank body, and are fixed to the outer wall of the tank body through fixed pipe clamps. The feed pipe is connected to the material truck, and the exhaust pipe extends to the wastewater recovery tank.

6. The dry mortar storage and mixing equipment for shield construction according to claim 2 is characterized in that: The temporary slurry storage tank is an open tank body, and a stirring shaft is provided in the tank body. The motor of the stirring shaft is fixed to the open surface of the tank body through a fixing frame. The stirring shaft extends vertically to the bottom of the tank and is rotatably connected to the bottom of the tank. A plurality of stirring blades are distributed on the stirring shaft from top to bottom, and the stirring blades are staggered. A water inlet joint connected to a clean water pipe is provided at the upper part of the temporary slurry storage tank, and a discharge port is provided at the bottom. The discharge port is connected to a mortar conveying pipeline, and the sewage pipe leads to a waste water tank, and a third solenoid valve is respectively provided on the sewage pipe and the mortar conveying branch pipe; the water spray heads are equidistantly distributed on the annular cleaning water pipe, and the water spray ports are facing the center of the tank body, and the console is connected to the signals of the two third solenoid valves.

7. The dry mortar storage and mixing equipment for shield construction according to claim 3 is characterized by: The water reservoir is an uncovered rectangular parallelepiped structure, with a water inlet pipe and a water outlet pipe provided accordingly. A flow meter is provided on the outlet pipe connecting the water reservoir and the mixing tank, and the flow meter is connected to the control console signal.

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