A concrete automatic metering device and its use method

Abstract

The present invention provides an automatic concrete metering device and its use method, which aims to solve the problem of inaccurate metering of existing concrete metering devices. It includes a metering funnel, a pressure sensor, a scraping device and a control system. The inner cavity of the cylindrical shell of the metering funnel is divided into a plurality of inner grooves of equal volume by a plurality of radially arranged interlayer plates. The pressure sensor is arranged at the top of the inner wall on both sides of the concrete inlet of the cylindrical shell. A scraping device is arranged corresponding to each inner groove of the metering funnel. The scraping device includes a connected motor and a telescopic rod, a clamping adjustment piece vertically connected to the other end of the telescopic rod, and a scraper connected to the clamping adjustment piece. When the inner groove filled with concrete rotates to the dumping position, the motor of the scraping device drives the telescopic rod to extend or shorten, driving the scraper to move along the surface of the interlayer plate in the direction of concrete dumping, and scraping the concrete residue attached to the interlayer plate until it is clean. This is repeated to accurately calculate the volume of concrete at the construction site.

Description

Technical Field

[0001] The present invention relates to the technical field of construction equipment, and in particular to an automatic concrete metering device and a use method thereof. Background Art

[0002] Before concrete is put into use, the raw materials such as cement, sand, and stone must be tested and mixed first. The raw materials can only be used after they are qualified. After concrete is put into use, concrete samples must be taken on site. If the slump of concrete is not qualified, it is strictly prohibited to use it. The existing concrete metering device and method automatically controls the concrete weight, rotation interval time and other parameters by setting them on a microcomputer. There is a problem that the actual metering results are inconsistent with the theoretical calculation results, which affects the accuracy of concrete metering. Summary of the invention

[0003] In view of the defect that the actual measurement result of the existing concrete metering device and method is inconsistent with the theoretical calculation result, which affects the accuracy of concrete measurement, the purpose of the present invention is to provide an automatic concrete metering device and a method for using the same.

[0004] The technical solution adopted by the present invention to solve the technical problem is: an automatic concrete metering device, which comprises:

[0005] The metering funnel comprises a hollow cylindrical shell, a rotating bearing arranged in the inner cavity of the cylindrical shell along the axis of the cylindrical shell, and a plurality of partition plates evenly arranged in the radial direction and fixed to the inner cavity of the cylindrical shell; one end of the partition plate is fixed to the rotating bearing, and the other end thereof is spaced apart from the cylindrical shell, and the plurality of partition plates divide the inner cavity of the cylindrical shell into a plurality of inner grooves of equal volume; a concrete inlet corresponding to the discharge port of a concrete tank truck is arranged at the top of the cylindrical shell, and a concrete outlet is arranged at the bottom of the cylindrical shell;

[0006] A plurality of pressure sensors are arranged at the top of the inner wall on both sides of the concrete inlet of the cylindrical shell;

[0007] Multiple scraping devices, one scraping device is correspondingly arranged on one side of each interlayer plate of the metering funnel, the scraping device comprises a connected motor and a telescopic rod, a clamping adjustment piece vertically connected to the other end of the telescopic rod, and a scraper arranged along the width direction of the interlayer plate and connected to the clamping adjustment piece; the motor is arranged at the end of the interlayer plate away from the rotating bearing, and the motor is connected to the inner wall of the cylindrical shell; the telescopic rod extends and contracts, driving the scraper to move along the surface of the interlayer plate;

[0008] The control system is respectively connected with the pressure sensor, the motor and the clamping adjustment part by signals.

[0009] The automatic concrete metering device of the present invention comprises a metering funnel, a pressure sensor, a plurality of scraping devices and a control system. The inner cavity of the cylindrical shell of the metering funnel is divided into a plurality of inner grooves of equal volume by a plurality of radially arranged partition plates. The plurality of partition plates are connected to a rotating bearing arranged along the axis of the cylindrical shell. The pressure sensor is arranged at the top of the inner wall on both sides of the concrete inlet of the cylindrical shell. A scraping device is arranged corresponding to each inner groove of the metering funnel. The scraping device comprises a motor and a telescopic rod connected to the inner wall of the cylindrical shell, a fixing adjustment piece vertically connected to the other end of the telescopic rod, and a scraper arranged along the width direction of the partition plate and connected to the fixing adjustment piece. When the inner groove filled with concrete rotates to the dumping position, the motor of the scraping device drives the telescopic rod to extend or shorten, driving the scraper to move along the surface of the partition plate in the direction of concrete dumping, and the scraper attached to the partition plate is removed. The concrete residue on the plate is scraped clean, and this process is repeated. The inner grooves of the metering funnel unload concrete one by one, so that the volume of concrete can be accurately calculated on the construction site. Since the volume of each inner groove of the metering funnel is equal, that is, the volume of concrete filled in each inner groove is also equal, it is convenient for construction personnel to calculate the discharge situation in the concrete tank truck on the spot, and effectively ensure the accuracy of the volume of concrete poured on site after it leaves the site. A scraping device is set in each inner groove of the metering funnel. During the process of unloading concrete in the inner groove, the scraper can be automatically controlled to scrape off the concrete residue attached to the interlayer plate, thereby improving the accuracy of concrete volume measurement. The automatic concrete metering device occupies a small area, is easy to transport and install, and is not limited to the site for use. It is particularly suitable for counting the volume of concrete released by concrete tank trucks during concrete pouring.

[0010] Furthermore, the automatic concrete metering device also includes a concrete trough, which is arranged at the bottom of the concrete outlet of the cylindrical shell.

[0011] Furthermore, the cylindrical shell is formed by welding two webs spaced apart along the axis and a plurality of arc-shaped plates disposed between the two webs. At least one web is a hollow structure. A plurality of elongated slide grooves are radially spaced apart on the inner side of the web. The elongated slide grooves correspond to the installation positions of the scraping devices. The motor, telescopic rod and fixing adjustment member of the scraping device are installed in the hollow inner cavity of the web. One end of the fixing adjustment member passes through the elongated slide groove and is connected to the scraper, so that the telescopic rod can drive the scraper to move back and forth along the elongated slide groove.

[0012] Furthermore, it also includes multiple soft rubber baffles fixed to the side walls of the web, the multiple soft rubber baffles cover the long slide groove, the screw of the clamping adjustment member passes through the long slide groove, pushes open the soft rubber baffle and connects with the scraper.

[0013] Furthermore, the fixing adjustment part includes a through-type motor actuator, a screw, a rotating nut and a fixing cap. A through hole is provided at the end of the telescopic rod away from the motor. The through-type motor actuator is installed at the end of the telescopic rod, and the center hole of the through-type motor actuator matches the size of the through hole at the end of the telescopic rod. A rotating nut is fixedly installed at the rotating shaft position on the other side of the through-type motor actuator. A screw is embedded in the center hole of the through-type motor actuator, and the external thread of the screw matches the internal thread of the rotating nut. The fixing cap is fixedly connected to the other end of the screw, and the cross-sectional size of the fixing cap matches the cross-sectional size of the scraper.

[0014] Furthermore, the fixing adjustment member also includes a limiting rod, one end of which is vertically fixed to the fixing cap, and the other end of which passes through a second through hole on the telescopic rod corresponding to the position of the limiting rod.

[0015] Furthermore, it also includes a protective cover installed on the outside of the pressure sensor, the protective cover includes a vertically arranged auxiliary baffle and a splash baffle, the pressure sensor is sealed and installed on the inner wall of the cylindrical shell, the splash baffle is vertically and fitly arranged on the side of the concrete inlet of the pressure sensor close to the cylindrical shell, and the probe of the pressure sensor is connected to the horizontally arranged auxiliary baffle.

[0016] In addition, the present invention also provides a method for using the automatic concrete metering device, the steps are as follows:

[0017] S1: Place the metering funnel at the bottom of the concrete tank truck, and the concrete inlet of the metering funnel corresponds to the discharge port of the concrete tank truck; when the pressure sensor detects that the inner cavity of the current inner tank of the metering funnel is filled with concrete, the control system controls the rotating bearing to rotate to the next inner tank, and the inner tank filled with concrete rotates downward and dumps the concrete;

[0018] S2: The control system controls the telescopic rod to retract, driving the scraper to scrape off the concrete residue on the surface of the interlayer plate. The telescopic rod extends, driving the scraper to move toward the rotating bearing. The scraper reciprocates along the surface of the interlayer plate to scrape off the concrete residue attached to the interlayer plate. Finally, the volume of concrete dumped in the concrete tank truck is counted.

[0019] The method for using the automatic concrete metering device of the present invention comprises the following steps: placing a metering funnel at the bottom of a concrete tank truck, wherein the concrete inlet of the metering funnel corresponds to the discharge port of the concrete tank truck; when the pressure sensor detects that the inner cavity of the current inner tank is full of concrete, the control system drives the rotating bearing to rotate to the next inner tank, and the inner tank full of concrete rotates downward and dumps the concrete; the control system controls the telescopic rod to contract, and drives the scraper to scrape the concrete residue on the surface of the interlayer plate; the telescopic rod is extended, and drives the scraper to move toward the direction close to the rotating bearing; the scraper reciprocates along the surface of the interlayer plate, and then scrapes the concrete residue attached to the interlayer plate cleanly; and finally, the volume of the concrete dumped in the concrete tank truck is counted; since the volume of concrete filled in each inner tank of the metering funnel is equal, it is convenient for construction personnel to calculate the discharge situation in the concrete tank truck on the spot, and effectively ensures the accuracy of the volume of concrete poured on site after the concrete is discharged; in the process of dumping concrete in the inner tank, the scraping device arranged in the inner tank can be used to automatically control the scraper to scrape the concrete residue attached to the interlayer plate, thereby improving the accuracy of concrete volume measurement.

[0020] Furthermore, step S1 also includes that the controller of the telescopic rod performs a stretching operation after receiving a signal that the rotating bearing has completed rotation, driving the scraper to move to a position close to the rotating bearing. After the adjustment is completed, the controller of the telescopic rod feeds back the adjustment completion information to the through-type motor actuator of the scraping device, and the through-type motor actuator performs a counterclockwise rotation operation, driving the rotating nut to operate synchronously. Under the action of the limiting action of the fixing cap, the screw and the rotating nut move relative to each other, driving the fixing cap to stretch outward until it covers the end of the scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an embodiment of an automatic concrete metering device of the present invention;

[0022] Figure 2 It is a schematic structural diagram of a protective cover of a pressure sensor in one embodiment of the present invention;

[0023] Figure 3 A schematic diagram of a scraper device in a closed state in one embodiment of the present invention;

[0024] Figure 4 A schematic diagram of the movement state of a scraper of a scraping device in one embodiment of the present invention;

[0025] Figure 5 It is a structural schematic diagram of a clamping adjustment member in one embodiment of the present invention;

[0026] Figure 6 Schematic diagram of the positional relationship between the long strip chute on the cylindrical shell and the scraping device in one embodiment of the present invention;

[0027] Figure 7 Schematic diagram of a soft rubber baffle covering a long strip chute in one embodiment of the present invention.

[0028] The numbers in the figure are as follows:

[0029] Cylindrical shell 11; interlayer plate 12; web 14; rotating bearing 15; long strip slide 16; motor 21; telescopic rod 24; fixing adjustment member 25; through-type motor actuator 251; screw 254; rotating nut 252; fixing cap 256; limit rod 257; scraper 26; pressure sensor 30; splash shield 32; auxiliary shield 35; soft rubber shield 40; concrete trough 50. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. For the convenience of description, the "upper" and "lower" described below are consistent with the upper and lower directions of the drawings, but this cannot be a limitation of the technical solution of the present invention.

[0031] Combination Figures 1 to 7 The automatic concrete metering device of the present invention is described, which comprises:

[0032] The metering funnel comprises a hollow cylindrical shell 11, a rotating bearing 15 arranged in the inner cavity of the cylindrical shell 11 along the axis thereof, and a plurality of partition plates 12 uniformly arranged in the radial direction and fixed to the inner cavity of the cylindrical shell 11; one end of the partition plate 12 is fixed to the rotating bearing 15, and the other end thereof is spaced apart from the cylindrical shell 11; the plurality of partition plates 12 divide the inner cavity of the cylindrical shell 11 into a plurality of inner grooves of equal volume, which are used to accurately measure the volume of concrete; a concrete inlet corresponding to the discharge port of a concrete tanker is arranged at the top of the cylindrical shell 11, and a concrete outlet is arranged at the bottom of the cylindrical shell 11;

[0033] A plurality of pressure sensors 30 are arranged at the top of the inner wall on both sides of the concrete inlet of the cylindrical shell 11;

[0034] A plurality of scraping devices, one scraping device is correspondingly arranged on one side of each interlayer plate 12 of the metering funnel, the scraping device comprises a connected motor 21 and a telescopic rod 24, a fixing adjustment member 25 vertically connected to the other end of the telescopic rod 24, and a scraper 26 arranged along the width direction of the interlayer plate 12 and connected to the fixing adjustment member 25; the motor 21 is arranged at the end of the interlayer plate 12 away from the rotating bearing 15, and the motor 21 is connected to the inner wall of the cylindrical shell 11; the telescopic rod 24 is extended, and the scraper 26 is located at one end of the interlayer plate 12 close to the rotating bearing 15, and the telescopic rod 24 is gradually contracted, driving the scraper 26 to gradually move along the surface of the interlayer plate 12 to the other end of the interlayer plate 12;

[0035] The control system is respectively connected to the pressure sensor 30, the motor 21, and the clamping adjustment member 25. In this embodiment, the signal transmission adopts a wireless transmission mode, and the telescopic rod 24 is made of a square rod.

[0036] The automatic concrete metering device of the present invention comprises a metering funnel, a pressure sensor 30, a plurality of scraping devices and a control system. The inner cavity of the cylindrical shell 11 of the metering funnel is divided into a plurality of inner grooves of equal volume by a plurality of radially arranged partition plates 12. The plurality of partition plates 12 are connected to a rotating bearing 15 arranged along the axis of the cylindrical shell 11. The pressure sensor 30 is arranged at the top of the inner wall on both sides of the concrete inlet of the cylindrical shell 11. A scraping device is arranged corresponding to each inner groove of the metering funnel. The scraping device comprises a motor 21 and a telescopic rod 24 connected to the inner wall of the cylindrical shell 11, a fixing adjustment piece 25 vertically connected to the other end of the telescopic rod 24, and a scraper 26 arranged along the width direction of the partition plate 12 and connected to the fixing adjustment piece 25. When the inner groove filled with concrete rotates to the dumping position, the motor 21 of the scraping device drives the telescopic rod 24 to extend or shorten, driving the scraper 26 to move along the surface of the partition plate 12. Move in the direction of concrete dumping, scrape off the concrete residue attached to the interlayer plate 12, and repeat this process. The inner grooves of the metering funnel dump concrete one by one, so that the volume of concrete can be accurately calculated on the construction site. Since the volume of each inner groove of the metering funnel is equal, that is, the volume of concrete filled in each inner groove is also equal, it is convenient for construction personnel to calculate the discharge situation in the concrete tank truck on the spot, and effectively ensure the accuracy of the volume of concrete poured on site after it leaves the concrete tank. A scraping device is provided in each inner groove of the metering funnel. During the process of dumping concrete in the inner groove, the scraper 26 can be automatically controlled to scrape off the concrete residue attached to the interlayer plate 12, thereby improving the accuracy of concrete volume measurement. The automatic concrete metering device occupies a small area, is easy to transport and install, and is not limited to the site for use. It is particularly suitable for counting the volume of concrete released by the concrete tank truck during the concrete pouring process.

[0037] like Figure 1 As shown, the automatic concrete metering device further includes a concrete trough 50, which is disposed at the bottom of the concrete outlet of the cylindrical shell 11 and is used to load the concrete dumped from the inner trough.

[0038] like Figure 3As shown, the cylindrical shell 11 is formed by two webs 14 spaced apart along the axis and a plurality of arc-shaped plates welded and connected between the two webs 14. A bearing fixing rod is provided in the inner hole of the rotating bearing 15. The two ends of the bearing fixing rod are respectively fixedly connected to the webs 14 on both sides. At least one web 14 is a hollow structure. A plurality of elongated grooves 16 are radially spaced apart on the inner side of the web 14. The elongated grooves 16 correspond to the installation position of the scraper device. The motor 21, telescopic rod 24 and fixing adjustment member 25 of the scraper device are installed in the inner cavity of the hollow web 14. One end of the fixing adjustment member 25 passes through the elongated groove 16 and is connected to the scraper 26, so that the telescopic rod 24 can drive the scraper 26 to move back and forth along the elongated groove 16.

[0039] like Figure 6 and Figure 7 As shown, the concrete automatic metering device also includes a plurality of soft rubber baffles 40 fixedly connected to the side wall of the web 14, the plurality of soft rubber baffles 40 cover the long strip slide 16, the screw 254 of the clamping adjustment member 25 passes through the long strip slide 16, pushes the soft rubber baffle 40 open and connects with the scraper 26. In the process of the scraper 26 moving along the surface of the interlayer plate 12 to scrape off the concrete residue, the plurality of soft rubber baffles 40 can prevent the concrete from entering the inner cavity of the web 14.

[0040] like Figure 3 and Figure 5 As shown, the fixing adjustment member 25 includes a through-type motor actuator 251, a screw 254, a rotating nut 252 and a fixing cap 256. A through hole 1 is provided at one end of the telescopic rod 24 away from the motor 21. The through-type motor actuator 251 is installed at the end of the telescopic rod 24, and the central hole of the through-type motor actuator 251 matches the size of the through hole 1 at the end of the telescopic rod 24. A rotating nut 252 is fixedly installed at the rotating shaft position on the other side of the through-type motor actuator 251. A screw 254 is embedded in the central hole of the through-type motor actuator 251. The external thread of the screw 254 matches the internal thread of the rotating nut 252. The fixing cap 256 is fixedly connected to the other end of the screw 254. The cross-sectional size of the fixing cap 256 matches the cross-sectional size of the scraper 26. The through-type motor actuator 251 performs a counterclockwise rotation operation, driving the rotating nut 252 to operate synchronously. Due to the limiting effect of the clamping cap 256, the screw 254 and the rotating nut 252 move relative to each other, pushing the clamping cap 256 to stretch outward until it covers the end of the scraper 26, so that a temporary clamping is formed between the clamping cap 256 and the scraper 26.

[0041] Please continue to refer to Figure 5The clamping adjustment member 25 further includes a limiting rod 257, one end of which is vertically fixed to the clamping cap 256, and the other end of which passes through the second through hole on the telescopic rod 24 corresponding to the position of the limiting rod 257. The limiting rod 257 temporarily limits the clamping cap 256, and when the rotating nut 252 and the screw rod 254 move relative to each other, it ensures that the screw rod 254 does not rotate together with the rotating nut 252, thereby realizing the relative movement of the rotating nut 252 and the screw rod 254, and ensuring that the clamping cap 256 can automatically extend and retract.

[0042] like Figure 1 and Figure 2 As shown, the concrete automatic metering device also includes a protective cover installed on the outside of the pressure sensor 30, the protective cover includes a vertically arranged auxiliary baffle 35 and a splash baffle 32, the pressure sensor 30 is sealed and installed on the inner wall of the cylindrical shell 11, the splash baffle 32 is vertically and closely arranged on the concrete inlet side of the pressure sensor 30 close to the cylindrical shell 11, and the probe of the pressure sensor 30 is connected to the horizontally arranged auxiliary baffle 35. When the inner cavity of the inner tank is filled with concrete, the concrete generates a certain pressure on the auxiliary baffle 35, and the corresponding pressure sensor 30 undergoes a certain pressure change. When the control system receives the pressure change signal, it indicates that the concrete in the current inner tank is full, and the pressure value is fed back to the control system. After receiving the pressure feedback data, the control system controls the rotating bearing 15 to perform a rotation operation, and the metering funnel rotates to the next inner tank. The pressure sensor 30 installed on the top of the inner tank is used to accurately monitor the volume of concrete. The protective cover is installed on the outside of the pressure sensor 30, which can provide good physical protection for the pressure sensor 30 to avoid affecting the accuracy of measurement due to contamination.

[0043] Combination Figures 1 to 7 The method of using the automatic concrete metering device of the present invention is described, and the specific steps are as follows:

[0044] S1: In the initial state, the distance between the scraper 26 in the two states of the telescopic rod 24 being retracted and extended is measured in advance, that is, the maximum moving distance d of the scraper 26 along the interlayer plate 12, and the metering funnel is placed at the bottom of the concrete tank truck, and the concrete inlet of the metering funnel corresponds to the discharge port of the concrete tank truck; when the pressure sensor 30 detects that the inner cavity of the current inner tank of the metering funnel is filled with concrete, the control system controls the rotating bearing 15 to rotate to the next inner tank, and the inner tank filled with concrete rotates downward and dumps the concrete, and the controller of the rotating bearing 15 feeds back a signal of rotation completion to the controller of the telescopic rod 24;

[0045] S2: The controller of the telescopic rod 24 controls the telescopic rod 24 to retract, driving the scraper 26 to slide along the long strip slide groove 16 on the inner wall of the web 14 toward the outer edge of the partition plate 12, scraping off the concrete residue on the surface of the partition plate 12. After the telescopic rod 24 is retracted to the shortest, that is, after the scraper 26 reaches the maximum moving distance d, the controller of the telescopic rod 24 performs a stretching operation, and the telescopic rod 24 stretches outward, driving the scraper 26 to move along the partition plate 12 toward the direction close to the rotating bearing 15, so that the scraper 26 can reciprocate along the surface of the partition plate 12, thereby scraping off the concrete residue attached to the partition plate 12, and finally, the volume of concrete dumped in the concrete tank truck is counted.

[0046] The method for using the automatic concrete metering device of the present invention is as follows: the metering funnel is placed at the bottom of the concrete tank truck, the concrete inlet of the metering funnel corresponds to the discharge port of the concrete tank truck, when the pressure sensor 30 detects that the inner cavity of the current inner tank is full of concrete, the control system drives the rotating bearing 15 to rotate to the next inner tank, the inner tank filled with concrete rotates downward and dumps the concrete, the control system controls the telescopic rod 24 to retract, drives the scraper 26 to scrape off the concrete residue on the surface of the partition plate 12, the telescopic rod 24 extends, drives the scraper 26 to move toward the rotating bearing 15, and the scraper 26 moves along the partition plate 12. The surface of the layer plate 12 reciprocates in this way, thereby scraping off the concrete residue attached to the interlayer plate 12, and finally counting the volume of concrete dumped in the concrete tank truck; since the volume of concrete filled in each inner groove of the measuring funnel is equal, it is convenient for construction personnel to calculate the discharge situation in the concrete tank truck on the spot, and effectively ensures the accuracy of the volume of concrete poured on site after it leaves the field; in the process of dumping concrete in the inner groove, the scraping device arranged in the inner groove can automatically control the scraper 26 to scrape off the concrete residue attached to the interlayer plate 12, thereby improving the accuracy of concrete volume measurement.

[0047] The step S1 also includes that the controller of the telescopic rod 24 performs a stretching operation after receiving a signal that the rotating bearing 15 has completed rotation, driving the scraper 26 to move to the initial position, that is, the position close to the rotating bearing 15. After the adjustment is completed, the controller of the telescopic rod 24 feeds back the adjustment completion information to the through-type motor actuator 251 of the scraping device, and the through-type motor actuator 251 performs a counterclockwise rotation operation, driving the rotating nut 252 to operate synchronously. Under the limiting action of the clamping cap 256, the screw rod 254 and the rotating nut 252 move relative to each other, driving the clamping cap 256 to stretch outward until it covers the end of the scraper 26. At this time, a temporary clamping is formed between the clamping cap 256 and the scraper 26. After completing the operation, the through-type motor actuator 251 feeds back information to the controller of the telescopic rod 24.

[0048] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of the claims.

Claims

1. A concrete automatic metering device, characterized in that: include: The metering funnel comprises a hollow cylindrical shell, a rotating bearing arranged in the inner cavity of the cylindrical shell along the axis of the cylindrical shell, and a plurality of partition plates evenly arranged in the radial direction and fixed to the inner cavity of the cylindrical shell; one end of the partition plate is fixed to the rotating bearing, and the other end thereof is spaced apart from the cylindrical shell, and the plurality of partition plates divide the inner cavity of the cylindrical shell into a plurality of inner grooves of equal volume; a concrete inlet corresponding to the discharge port of a concrete tank truck is arranged at the top of the cylindrical shell, and a concrete outlet is arranged at the bottom of the cylindrical shell; A plurality of pressure sensors are arranged at the top of the inner wall on both sides of the concrete inlet of the cylindrical shell; A plurality of scraping devices, a scraping device is correspondingly arranged on one side of each interlayer plate of the metering funnel, the scraping device comprises a connected motor and a telescopic rod, a fixing adjustment piece vertically connected to the other end of the telescopic rod, and a scraper arranged along the width direction of the interlayer plate and connected to the fixing adjustment piece; the motor is arranged at the end of the interlayer plate away from the rotating bearing, and the motor is connected to the inner wall of the cylindrical shell; the telescopic rod extends and contracts to drive the scraper to move along the surface of the interlayer plate; the fixing adjustment piece comprises a through-type motor actuator, a screw, a rotating nut and a fixing cap, a through hole is provided at the end of the telescopic rod away from the motor, the through-type motor actuator is installed at the end of the telescopic rod, and the center hole of the through-type motor actuator matches the size of the through hole at the end of the telescopic rod, a rotating nut is fixedly installed at the rotating shaft position on the other side of the through-type motor actuator, a screw is embedded in the center hole of the through-type motor actuator, the external thread of the screw matches the internal thread of the rotating nut, the fixing cap is fixedly connected to the other end of the screw, and the cross-sectional size of the fixing cap matches the cross-sectional size of the scraper; The control system is respectively connected with the pressure sensor, the motor and the clamping adjustment part by signals.

2. The automatic concrete metering device according to claim 1 is characterized in that: The automatic concrete metering device also includes a concrete trough, which is arranged at the bottom of the concrete outlet of the cylindrical shell.

3. The automatic concrete metering device according to claim 1 is characterized in that: The cylindrical shell is formed by welding two webs spaced apart along the axis and a plurality of arc-shaped plates disposed between the two webs. At least one web is a hollow structure. A plurality of elongated slide grooves are radially spaced apart on the inner side of the web. The elongated slide grooves correspond to the installation positions of the scraping devices. The motor, telescopic rod and fixing adjustment member of the scraping device are installed in the hollow inner cavity of the web. One end of the fixing adjustment member passes through the elongated slide groove and is connected to the scraper, so that the telescopic rod can drive the scraper to move back and forth along the elongated slide groove.

4. The automatic concrete metering device according to claim 3 is characterized in that: It also includes multiple soft rubber baffles fixedly connected to the side wall of the web, which cover the long strip slide groove. The screw of the clamping adjustment piece passes through the long strip slide groove, pushes open the soft rubber baffle and connects with the scraper.

5. The automatic concrete metering device according to claim 1 is characterized in that: The clamping adjustment member also includes a limiting rod, one end of which is vertically fixed to the clamping cap, and the other end of which passes through a second through hole on the telescopic rod corresponding to the position of the limiting rod.

6. The automatic concrete metering device according to claim 1 is characterized in that: It also includes a protective cover installed on the outside of the pressure sensor, the protective cover includes a vertically arranged auxiliary baffle and a splash baffle, the pressure sensor is sealed and installed on the inner wall of the cylindrical shell, the splash baffle is vertically and closely arranged on the side of the concrete inlet of the pressure sensor close to the cylindrical shell, and the probe of the pressure sensor is connected to the horizontally arranged auxiliary baffle.

7. The method for using the automatic concrete metering device according to any one of claims 1 to 6, characterized in that: Here are the steps: S1: Place the metering funnel at the bottom of the concrete tank truck, and the concrete inlet of the metering funnel corresponds to the discharge port of the concrete tank truck; when the pressure sensor detects that the inner cavity of the current inner tank of the metering funnel is full of concrete, the control system controls the rotating bearing to rotate to the next inner tank, and the inner tank filled with concrete rotates downward and dumps the concrete; the controller of the telescopic rod performs a stretching operation after receiving the signal that the rotating bearing has completed rotation, driving the scraper to move to a position close to the rotating bearing. After the adjustment is completed, the controller of the telescopic rod feeds back the adjustment completion information to the through-type motor actuator of the scraping device, and the through-type motor actuator performs a counterclockwise rotation operation, driving the rotating nut to operate synchronously. Under the action of the clamping cap limit, the screw and the rotating nut move relative to each other, driving the clamping cap to stretch outward until it covers the end of the scraper; S2: The control system controls the telescopic rod to retract, driving the scraper to scrape off the concrete residue on the surface of the interlayer plate. The telescopic rod extends, driving the scraper to move toward the rotating bearing. The scraper reciprocates along the surface of the interlayer plate to scrape off the concrete residue attached to the interlayer plate. Finally, the volume of concrete dumped in the concrete tank truck is counted.

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