Automatic liquid metering device

Abstract

The utility model relates to the field of liquid metering equipment, and discloses an automatic liquid metering device which comprises a metering tank and a cleaning mechanism, the cleaning mechanism comprises a lifting frame, a lifting driving assembly, an annular water guide pipe, an annular mounting frame and a plurality of spray heads, and the lifting frame is mounted in the metering tank; the lifting driving assembly is used for driving the lifting frame to move in the vertical direction, the annular water guide pipe and the annular mounting frame are mounted on the lifting frame, the annular water guide pipe communicates with a water inlet pipe, the other end of the water inlet pipe extends out of the metering tank, the multiple nozzles are mounted on the annular mounting frame in a circumferential array structure, and the water inlet ends of the nozzles communicate with the annular water guide pipe. And the spraying direction of the spray head faces the inner wall of the metering tank. According to the utility model, after the metering tank is used up, the metering tank can be automatically flushed by the cleaning mechanism, which is very convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid metering equipment, in particular to an automatic liquid metering device. Background Art

[0002] Internal mixer, also known as closed mixer, is a commonly used production equipment in rubber products related industries, mainly used for rubber plasticization and mixing. In the process of using internal mixer to produce rubber products, it is usually necessary to add a certain amount of other inorganic and organic compounds to the raw rubber. These compounds are the so-called rubber compounding agents. The amount of compounding agents must be controlled within an appropriate range. Too much or too little will affect the quality of the rubber.

[0003] In industry, liquid metering devices are generally used to weigh liquid compounding agents. Liquid metering devices are mainly composed of an infusion pump, a metering tank, a weighing sensor and a controller. When the device is working, the infusion pump first delivers the liquid to the metering tank, and the weighing sensor records the weight of the liquid. When the required weight is reached, the infusion pump delivers the liquid in the metering tank to the internal mixer.

[0004] Although the existing liquid metering device has a relatively simple structure and is relatively convenient to operate, the metering tank is not easy to clean after use. Summary of the invention

[0005] In view of this, the purpose of the utility model is to provide an automatic liquid metering device to solve the problem pointed out in the background art that the metering tank in the existing liquid metering device is inconvenient to clean after use.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] A liquid automatic metering device, the metering device includes a metering tank and a cleaning mechanism, the cleaning mechanism includes a lifting frame, a lifting drive assembly, an annular water pipe, an annular mounting frame and a plurality of nozzles, the lifting frame is installed in the metering tank, the lifting drive assembly is used to drive the lifting frame to move in a vertical direction, the annular water pipe and the annular mounting frame are installed on the lifting frame, the upper part of the annular water pipe is connected to a water inlet pipe, the other end of the water inlet pipe extends to the outside of the metering tank, a plurality of nozzles are installed on the annular mounting frame in a circumferential array structure, the water inlet end of the nozzle is connected to the annular water pipe, and the spraying direction of the nozzle is toward the inner wall of the metering tank.

[0008] Furthermore, a funnel portion is provided on the bottom side of the metering tank; a plurality of rotating wheels are rotatably mounted on the annular mounting frame, the rotating wheels correspond to the nozzles one by one, and the nozzles are mounted on the rotating wheels corresponding thereto; a first motor is fixed on the lifting frame, a driving wheel disc is fixed on the output shaft of the first motor, and the driving wheel disc is located between all the rotating wheels and meshedly connected with all the rotating wheels.

[0009] Furthermore, two lifting limit rods are fixed on the lifting frame, and the top side of the metering tank is provided with limit holes adapted to the lifting limit rods. The lifting limit rods penetrate the limit holes and can move in the vertical direction.

[0010] Furthermore, the lifting drive assembly includes a threaded sleeve, a screw, a first gear, a second gear and a second motor; a mounting portion is installed on the top of the metering tank, and the threaded sleeve is rotatably mounted on the mounting portion; one end of the screw is fixed on the lifting frame, and the other end extends outside the metering tank, the screw passes through the threaded sleeve and is threadedly connected to the threaded sleeve, and the first gear is fixed on the threaded sleeve; the second motor is installed on the top of the metering tank, the second gear is fixed on the output shaft of the second motor, and the second gear is meshed with the first gear.

[0011] Furthermore, the water inlet pipe is an elastic spiral pipe, a water inlet joint is installed on the top of the metering tank, the water inlet end of the elastic spiral pipe is connected to the water inlet joint, and the other end is connected to the annular water guide pipe.

[0012] Furthermore, the metering device also includes a frame, a weighing platform and a controller, the metering tank is mounted on the frame, the frame is mounted on the weighing platform, a weighing sensor is installed in the weighing platform, and the weighing sensor is electrically connected to the controller.

[0013] Furthermore, the metering device also includes a two-way water pump, a first solenoid valve and a second solenoid valve, one end of the two-way water pump is connected to a first pipe, the end of the first pipe away from the two-way water pump is connected to the bottom of the metering tank, the other end of the two-way water pump is connected to a second pipe, the end of the second pipe away from the two-way water pump is connected to a feed pipe and a discharge pipe, the first solenoid valve is installed on the feed pipe, the second solenoid valve is installed on the discharge pipe, and the two-way water pump, the first solenoid valve and the second solenoid valve are all electrically connected to the controller.

[0014] Beneficial effects of the utility model:

[0015] 1. Through the technical solution of the present application, after the metering tank is used up, first connect the bottom of the metering tank to another waste liquid collection pipe, then connect the water inlet pipe to the external clean water source, so that the clean water source is introduced into all nozzles through the water inlet pipe and the annular water guide pipe, and finally sprayed onto the inner wall of the metering tank through all nozzles; at the same time, the lifting drive assembly drives the lifting frame to move in the vertical direction, driving all nozzles to move in the vertical direction to flush the inner wall of the metering tank, and the flushed waste liquid can flow from the bottom to the wastewater treatment equipment. Through this arrangement, after the metering tank is used up, the cleaning mechanism is used to automatically flush the metering tank, which is very convenient.

[0016] 2. Through the technical solution of the present application, when the lifting drive assembly drives the lifting frame to move to the funnel position, the first motor can be used to control the driving wheel to rotate, and then drive all the rotating wheels to rotate, thereby driving the nozzle to rotate, so that the spray range of the nozzle can cover the inner wall of the funnel and flush the inner wall of the funnel. Through this arrangement, the flushing range and flushing quality of the entire inner wall of the metering tank by the cleaning mechanism can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the metering device in the embodiment of the present application;

[0018] Figure 2 is a cross-sectional view of a metering device in an embodiment of the present application;

[0019] Figure 3 It is a structural schematic diagram of the cleaning mechanism in the embodiment of the present application;

[0020] Among them, 100, metering tank; 110, funnel part; 120, installation part; 130, water inlet joint; 200, frame; 300, weighing platform; 400, two-way water pump; 410, first pipeline; 420, second pipeline; 421, feed pipeline; 422, discharge pipeline; 500, first solenoid valve; 600, second solenoid valve; 700, cleaning mechanism; 710, lifting frame; 711, first motor; 712, driving wheel; 713, lifting limit rod; 721, threaded sleeve; 722, screw; 723, first gear; 724, second gear; 725, second motor; 730, annular water guide pipe; 731, water inlet pipe; 740, annular mounting frame; 741, rotating wheel; 750, nozzle; 751, hose. DETAILED DESCRIPTION

[0021] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0022] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the figures, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] like Figure 1-3 As shown, the embodiment of the present application provides an automatic liquid metering device, which includes a metering tank 100, a frame 200, a weighing platform 300, a controller, a two-way water pump 400, a first solenoid valve 500 and a second solenoid valve 600. Among them, the metering tank 100 is installed on the frame 200, and the frame 200 is mainly used to fix the metering tank 100. The frame 200 is installed on the weighing platform 300, and a weighing sensor is installed in the weighing platform 300, which is mainly used to obtain the weight of the liquid in the metering tank 100. One end of the two-way water pump 400 is connected to a first pipe 410, and the end of the first pipe 410 away from the two-way water pump 400 is connected to the bottom of the metering tank 100; the other end of the two-way water pump 400 is connected to a second pipe 420, and the end of the second pipe 420 away from the two-way water pump 400 is connected to a feed pipe 421 and a discharge pipe 422. Among them, the feed pipe 421 is connected to the raw material tank, the discharge pipe 422 is connected to the internal mixer, the first solenoid valve 500 is installed on the feed pipe 421, and the second solenoid valve 600 is installed on the discharge pipe 422. In addition, the weighing sensor, the two-way water pump 400, the first solenoid valve 500 and the second solenoid valve 600 are all electrically connected to the controller, and the controller controls the opening and closing of these electrical components.

[0024] When the device is working, first open the first solenoid valve 500, close the second solenoid valve 600, and control the bidirectional water pump 400 to rotate forward, so as to transport the liquid in the raw material tank to the metering tank 100, and a weighing sensor records the weight of the liquid; when the weight of the liquid reaches a preset amount, then open the second solenoid valve 600, close the first solenoid valve 500, and control the bidirectional water pump 400 to rotate reversely, so as to transport the liquid in the metering tank 100 to the internal mixer. In addition, in order to improve the accuracy of the weight of the transported liquid, this embodiment adopts a method of weighing by material reduction to calculate the weight of the liquid transported to the metering tank 100, that is, the actual weight of the liquid is equal to the difference between the two weights obtained by the weighing sensor.

[0025] In order to facilitate the cleaning of the metering tank 100 after use, the metering device in this embodiment also includes a cleaning mechanism 700, which includes a lifting frame 710, a lifting drive assembly, an annular water pipe 730, an annular mounting frame 740 and a plurality of nozzles 750. The lifting frame 710 is installed inside the metering tank 100, and the lifting drive assembly is mainly used to drive the lifting frame 710 to move in the vertical direction. The annular water pipe 730 and the annular mounting frame 740 are installed on the lifting frame 710, wherein the upper part of the annular water pipe 730 is connected to a water inlet pipe 731, and the other end of the water inlet pipe 731 extends to the outside of the metering tank 100 for connecting to an external clean water source. A plurality of nozzles 750 are mounted on the annular mounting frame 740 in a circumferential array structure. In this embodiment, the number of nozzles 750 is set to seven. The water inlet end of the nozzle 750 is connected to the annular water guide pipe 730 through a hose 751. The water outlet surface of the nozzle 750 is evenly provided with a plurality of spray holes. The spray direction of the nozzle 750 is toward the inner wall of the metering tank 100. The spray range of the nozzle 750 can be designed according to the actual parameters of the inner wall of the metering tank 100.

[0026] Through the above technical solution, after the metering tank 100 is used up, firstly, the bottom of the metering tank 100 is connected to another waste liquid collection pipe, and then the water inlet pipe 731 is connected to the external clean water source, so that the clean water source is introduced into all the nozzles 750 through the water inlet pipe 731 and the annular water guide pipe 730, and finally sprayed onto the inner wall of the metering tank 100 through all the nozzles 750; at the same time, the lifting drive assembly drives the lifting frame 710 to move in the vertical direction, driving all the nozzles 750 to move in the vertical direction, and flushing the inner wall of the metering tank 100, and the flushed waste liquid can flow from the bottom to the wastewater treatment equipment. Through such a setting, after the metering tank 100 is used up, the cleaning mechanism 700 is used to automatically flush the metering tank 100, which is very convenient.

[0027] In this embodiment, a funnel 110 is provided on the bottom side of the metering tank 100, and the design of the funnel 110 is to facilitate the extraction of the liquid in the metering tank 100. However, the conventional nozzle 750 is not convenient for washing the inner wall of the funnel 110. In order to solve this problem, a plurality of rotating wheels 741 are rotatably mounted on the annular mounting frame 740, and the number of rotating wheels 741 is also set to seven. The rotating wheels 741 correspond to the nozzles 750 one by one, and each nozzle 750 is mounted on the corresponding rotating wheel 741, so that the nozzle 750 can rotate according to the rotating wheel 741. A first motor 711 is fixed on the lifting frame 710, and a driving wheel disc 712 is fixed on the output shaft of the first motor 711. The driving wheel disc 712 is located between all the rotating wheels 741 and is meshed and connected with all the rotating wheels 741. It should be noted that the meshing mode between the driving wheel disc 712 and the rotating wheel 741 is the same as the meshing mode of the worm gear.

[0028] Through the above technical solution, when the lifting drive assembly drives the lifting frame 710 to move to the position of the funnel part 110, the first motor 711 can control the driving wheel disc 712 to rotate, and then drive all the rotating wheels 741 to rotate, thereby driving the nozzle 750 to rotate, so that the spray range of the nozzle 750 can cover the inner wall of the funnel part 110, and wash the inner wall of the funnel part 110. Through such a setting, the washing range and washing quality of the washing mechanism 700 on the inner wall of the entire metering tank 100 can be improved.

[0029] In this embodiment, two lifting limit rods 713 are fixed on the lifting frame 710, and the top side of the metering tank 100 is provided with limit holes adapted to the lifting limit rods 713, and the lifting limit rods 713 pass through the limit holes and can move in the vertical direction. By such an arrangement, the lifting frame 710 can move in the vertical direction in the metering tank 100.

[0030] In this embodiment, the lifting drive assembly includes a threaded sleeve 721, a screw rod 722, a first gear 723, a second gear 724, and a second motor 725. The top of the metering tank 100 is provided with a mounting portion 120, the threaded sleeve 721 is rotatably mounted on the mounting portion 120, and an internal thread is provided on the inner ring of the threaded sleeve 721. The lower end of the screw rod 722 is fixed on the lifting frame 710, the upper end of the screw rod 722 extends to the outside of the metering tank 100, the screw rod 722 penetrates the threaded sleeve 721 and is threadedly connected with the threaded sleeve 721. The first gear 723 is fixed on the threaded sleeve 721, and the first gear 723 can drive the threaded sleeve 721 to rotate when it rotates. The second motor 725 is installed on the top of the metering tank 100, the second gear 724 is fixed on the output shaft of the second motor 725, and the second gear 724 is meshed and connected with the first gear 723. By such arrangement, the second motor 725 can drive the second gear 724 to rotate, and then drive the threaded sleeve 721 to rotate through the first gear 723. When the threaded sleeve 721 rotates, it can drive the screw rod 722 to move in the vertical direction, thereby driving the lifting frame 710 to move in the vertical direction.

[0031] In this embodiment, the water inlet pipe 731 is preferably an elastic spiral pipe, which can reduce the interference of the water inlet pipe 731 on the internal space of the metering tank 100. A water inlet joint 130 is installed on the top of the metering tank 100. The water inlet end of the elastic spiral pipe is connected to the water inlet joint 130, and the other end is connected to the annular water guide pipe 730. When connecting to an external clean water source, it can be directly connected to the water inlet joint 130.

[0032] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. A liquid automatic metering device, characterized in that: The metering device comprises a metering tank (100) and a cleaning mechanism (700), wherein the cleaning mechanism (700) comprises a lifting frame (710), a lifting drive assembly, an annular water pipe (730), an annular mounting frame (740) and a plurality of nozzles (750), wherein the lifting frame (710) is installed in the metering tank (100), the lifting drive assembly is used to drive the lifting frame (710) to move in a vertical direction, and the annular water pipe (730) and the annular mounting frame (740) are used to move the lifting frame (710) in a vertical direction. The annular water pipe (740) is installed on the lifting frame (710), the upper end of the annular water pipe (730) is connected to a water inlet pipe (731), the other end of the water inlet pipe (731) extends to the outside of the metering tank (100), and a plurality of the spray heads (750) are installed on the annular mounting frame (740) in a circumferential array structure, the water inlet end of the spray head (750) is connected to the annular water pipe (730), and the spraying direction of the spray head (750) is toward the inner wall of the metering tank (100).

2. The metering device according to claim 1, characterized in that A funnel portion (110) is provided on the bottom side of the metering tank (100); a plurality of rotating wheels (741) are rotatably mounted on the annular mounting frame (740); the rotating wheels (741) correspond to the spray heads (750) one by one, and the spray heads (750) are mounted on the corresponding rotating wheels (741); a first motor (711) is fixed on the lifting frame (710); a driving wheel disc (712) is fixed on the output shaft of the first motor (711); the driving wheel disc (712) is located between all the rotating wheels (741) and is meshedly connected with all the rotating wheels (741).

3. The metering device according to claim 2, characterized in that: Two lifting limit rods (713) are fixed on the lifting frame (710), and a limit hole adapted to the lifting limit rod (713) is provided on the top side of the metering tank (100). The lifting limit rod (713) passes through the limit hole and can move in the vertical direction.

4. The metering device according to claim 3, characterized in that The lifting drive assembly comprises a threaded sleeve (721), a screw rod (722), a first gear (723), a second gear (724) and a second motor (725); a mounting portion (120) is mounted on the top of the metering tank (100), and the threaded sleeve (721) is rotatably mounted on the mounting portion (120); one end of the screw rod (722) is fixed on the lifting frame (710), and the other end extends outside the metering tank (100); the screw rod (722) passes through the threaded sleeve (721) and is threadedly connected to the threaded sleeve (721); the first gear (723) is fixed on the threaded sleeve (721); the second motor (725) is mounted on the top of the metering tank (100), the second gear (724) is fixed on the output shaft of the second motor (725), and the second gear (724) is meshedly connected with the first gear (723).

5. The metering device according to claim 1, characterized in that: The water inlet pipe (731) is an elastic spiral pipe, and a water inlet joint (130) is installed on the top of the metering tank (100). The water inlet end of the elastic spiral pipe is connected to the water inlet joint (130), and the other end is connected to the annular water guide pipe (730).

6. The metering device according to any one of claims 1 to 5, characterized in that: The metering device further comprises a frame (200), a weighing platform (300) and a controller, wherein the metering tank (100) is mounted on the frame (200), the frame (200) is mounted on the weighing platform (300), a weighing sensor is mounted in the weighing platform (300), and the weighing sensor is electrically connected to the controller.

7. The metering device according to claim 6, characterized in that The metering device further comprises a bidirectional water pump (400), a first solenoid valve (500) and a second solenoid valve (600); one end of the bidirectional water pump (400) is connected to a first pipe (410); one end of the first pipe (410) away from the bidirectional water pump (400) is connected to the bottom of the metering tank (100); the other end of the bidirectional water pump (400) is connected to a second pipe (420); one end of the second pipe (420) away from the bidirectional water pump (400) is connected to a feed pipe (421) and a discharge pipe (422); the first solenoid valve (500) is installed on the feed pipe (421); the second solenoid valve (600) is installed on the discharge pipe (422); and the bidirectional water pump (400), the first solenoid valve (500) and the second solenoid valve (600) are all electrically connected to a controller.

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