Spiral metering device

Abstract

The utility model relates to the technical field of metering devices, and discloses a spiral metering device. The spiral metering device comprises a supporting frame, a frequency converter is fixedly installed above the supporting frame, a plc controller is fixedly installed above the frequency converter, a limiting frame is installed at the upper end of the supporting frame in an embedded mode, a pressure sensor is fixedly installed at the bottom end of the limiting frame, a conveying pipe is fixedly installed above the limiting frame, and a pressure sensor is fixedly installed at the bottom end of the conveying pipe. End plates are fixedly installed at the front end and the rear end of the conveying pipe, an insertion plate protruding structure is fixedly connected with the movable ends of pistons, the pistons are symmetrically installed on the front side and the rear side of the insertion plate protruding structure in the front-back direction, the pistons are fixedly connected with the valve body, and after the material weight reaches the standard, the plc outputs a control signal. The relative position between the inserting plate and the valve body is adjusted by driving the inserting plate to move through the piston, so that the valve body is quickly blocked after the weight of the materials reaches the standard, and part of the materials are prevented from continuously falling into lower-level equipment.

Description

Technical Field

[0001] This utility model relates to the field of metering device technology, specifically a screw metering device. Background Technology

[0002] A screw conveyor is a device used for conveying and measuring granular materials. It is widely used in modern industrial production. The material is conveyed from the feed inlet to the metering reamer connected below via a screw conveyor. The weighing pressure sensor installed on the metering reamer detects the weight of the material and generates a voltage signal proportional to the weighing load, which is sent to the PLC controller. Together with the preset reamer speed data, the instantaneous flow rate and cumulative weight value are calculated.

[0003] The existing Chinese utility model patent with publication number CN201311318Y discloses a dynamic metering device for powder materials. It consists of a screw feeder comprising a screw shell, screw blades, a screw shaft, a motor reducer, and a coupling. A lever fulcrum supports the screw feeder on a rigid frame. The feed inlet of the screw feeder is softly connected to the upper feed pipe via an elastic sleeve. At the discharge end, a weighing pressure sensor and a pressure balancing device are installed. The key feature of this pressure balancing device is that the pressure balancing ports are symmetrically located directly above the discharge port, and the discharge port and pressure balancing ports have the same cross-sectional area. The air pressure acting on the screw weighing scale is equal in magnitude and opposite in direction, resulting in a balance. The total force exerted by the gas pressure on the weighing pressure sensor is zero, thus the weighing pressure sensor signal is unaffected by changes in gas pressure at the discharge port. This utility model has a simple structure and reasonable design, solving the problem of significant interference from gas pressure on the screw weighing scale's pressure sensor signal, leading to severe measurement distortion. It greatly improves the measurement accuracy of the screw weighing scale under air pressure conditions. This invention can be widely applied to powder metering where there are gas pressure changes at the powder outlet.

[0004] Most existing screw metering devices are suspended, and the metering device must be flexibly connected to the upper and lower levels. After the metering device is under load, the weight of the material and pipeline will be transferred to the suspended weighing equipment, resulting in poor stability during use. At the same time, due to the influence of the auger inside the screw metering device, after the material reaches the set weight, some material will still fall into the lower level equipment, affecting the accuracy of the proportioning. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the shortcomings of the existing technology, this utility model provides a screw metering device, which has the advantages of improving the stability of the device and preventing the material from continuing to fall after the screw stops rotating, thus solving the above-mentioned technical problems.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a spiral metering device, comprising: a support frame, a frequency converter fixedly installed above the support frame, a PLC controller fixedly installed above the frequency converter, a limit frame fitted at the upper end of the support frame, a pressure sensor fixedly installed at the bottom end of the limit frame, a conveying pipe fixedly installed above the limit frame, end plates fixedly installed at both ends of the conveying pipe, a bearing fitted at the center of the end plate, an auger inserted inside the bearing, a drive motor fixedly installed at the left end of the auger, a fixing frame inserted outside the drive motor, a valve body fixedly installed at the lower end of the conveying pipe, an insert plate fitted inside the valve body, and a piston fixedly installed on one side of the insert plate; the frequency converter is capable of adjusting the speed of the drive motor.

[0009] As a preferred technical solution of this utility model, the upper part of the support frame is provided with a symmetrical protruding structure, and the top surface of the protruding structure of the support frame is provided with a recessed structure that fits into the limiting frame. The limiting frame is symmetrically installed below the conveying pipe with the center of the conveying pipe as the reference. The conveying pipe can limit the position of the material.

[0010] As a preferred technical solution of this utility model, the left and right sides of the limiting frame are provided with symmetrical protrusions, the limiting frame and the support frame are slidably connected, the pressure sensor is symmetrically installed at the bottom of the limiting frame, and the pressure sensor is located inside the recessed structure at the top of the support frame, with its bottom surface in contact with the bottom surface of the recessed structure of the support frame; the pressure sensor can weigh the conveying pipe.

[0011] As a preferred embodiment of this utility model, the end plate is fixed to the left and right ends of the conveying pipe by bolts, the auger is rotatably connected to the end plate by bearings, the left end of the auger is fixedly connected to the shaft of the drive motor, and the outer edge of the auger is in contact with the inner wall of the conveying pipe; the auger can drive the material to move when it rotates.

[0012] As a preferred embodiment of this utility model, the drive motor is fixedly connected to the left end plate via a fixing frame, and the valve body is fixedly connected to the conveying pipe via bolts; the drive motor can drive the auger to rotate.

[0013] As a preferred embodiment of this utility model, the insert plate and the valve body are connected in a sliding manner, and the end of the insert plate is fitted into the inner wall of the valve body. The left end of the insert plate is provided with a symmetrical protrusion structure, and the protrusion structure of the insert plate is fixedly connected to the movable end of the piston. The insert plate can block the valve body to prevent the material from falling.

[0014] As a preferred embodiment of this utility model, the piston is symmetrically installed on the front and rear sides of the protruding structure of the insert plate, and the piston and the valve body are fixedly connected; the piston can drive the insert plate to move.

[0015] Compared with the prior art, the present invention provides a screw metering device, which has the following beneficial effects:

[0016] 1. This utility model features a support frame with symmetrical raised structures on its upper part. The top surface of these raised structures has a recessed structure that engages with a limiting frame. The limiting frame is symmetrically installed below the conveying pipe, with the center of the pipe as a reference. Symmetrical raised structures are located on both sides of the limiting frame. A sliding connection is formed between the limiting frame and the support frame. A pressure sensor is symmetrically installed at the bottom of the limiting frame, located inside the recessed structure at the top of the support frame, with its bottom surface contacting the bottom surface of the recessed structure. Because of the sliding connection between the limiting frame and the support frame, and the pressure sensor's location between them, the weight of the conveying pipe and the material can be monitored by the pressure sensor. When there is no material inside the conveying pipe, the pressure sensor is zeroed to measure the material weight. This method achieves weighing while simultaneously limiting the position of the conveying pipe through the limiting frame. The position of the conveying pipe remains constant during device operation, improving the stability of the device.

[0017] 2. This utility model uses a slide plate to form a sliding connection between the slide plate and the valve body. The end of the slide plate is fitted into the inner wall of the valve body. The left end of the slide plate has a symmetrical protrusion structure, which is fixedly connected to the movable end of the piston. The piston is symmetrically installed on the front and rear sides of the protrusion structure of the slide plate, and is fixedly connected to the valve body. After the material weight reaches the standard, the PLC controller will output a control signal to move the slide plate through the piston to adjust the relative position between the slide plate and the valve body. This allows the valve body to be quickly sealed after the material weight reaches the standard, preventing some material from falling into the lower-level equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the pressure sensor mounting structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the auger installation structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the insert plate mounting structure of this utility model;

[0022] The components are: 1. Support frame; 11. Frequency converter; 12. PLC controller; 13. Limit frame; 14. Pressure sensor; 15. Conveying pipe; 16. End plate; 17. Bearing; 18. Screwdriver; 19. Drive motor; 110. Fixing frame; 111. Valve body; 112. Insert plate; 113. Piston. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figure 1 - Figure 4 In this embodiment, a spiral metering device includes: a support frame 1, a frequency converter 11 fixedly installed above the support frame 1, a PLC controller 12 fixedly installed above the frequency converter 11, a limit frame 13 fitted into the upper end of the support frame 1, a pressure sensor 14 fixedly installed at the bottom end of the limit frame 13, a conveying pipe 15 fixedly installed above the limit frame 13, end plates 16 fixedly installed at both ends of the conveying pipe 15, a bearing 17 fitted into the center of the end plate 16, an auger 18 inserted inside the bearing 17, a drive motor 19 fixedly installed at the left end of the auger 18, a fixing frame 110 inserted outside the drive motor 19, a valve body 111 fixedly installed at the lower end of the conveying pipe 15, an insert plate 112 fitted into the valve body 111, and a piston 113 fixedly installed on one side of the insert plate 112.

[0027] The support frame 1 has symmetrical raised structures on its upper part, and the top surface of the raised structures of the support frame 1 has a recessed structure that fits into the limiting frame 13. The limiting frame 13 is symmetrically installed below the conveying pipe 15 with the center of the conveying pipe 15 as the reference. The left and right sides of the limiting frame 13 have symmetrical raised structures. The limiting frame 13 and the support frame 1 form a sliding connection. The pressure sensor 14 is symmetrically installed at the bottom end of the limiting frame 13, and the pressure sensor 14 is located inside the recessed structure at the top of the support frame 1, with its bottom surface in contact with the bottom surface of the recessed structure of the support frame 1. The end plate 16 is fixed to the left and right ends of the conveying pipe 15 by bolts. The auger 18 forms a rotating connection with the end plate 16 through the bearing 17. The auger 18 is fixedly connected to the shaft of the drive motor 19. The outer edge of the auger 18 contacts the inner wall of the conveying pipe 15. The drive motor 19 is fixedly connected to the left end plate 16 via the fixing bracket 110. The valve body 111 is fixedly connected to the conveying pipe 15 via bolts. The insert plate 112 is slidably connected to the valve body 111, and the end of the insert plate 112 is fitted into the inner wall of the valve body 111. The left end of the insert plate 112 is provided with a symmetrical protrusion structure, and the protrusion structure of the insert plate 112 is fixedly connected to the movable end of the piston 113. The piston 113 is symmetrically installed on the front and rear sides of the protrusion structure of the insert plate 112, and the piston 113 is fixedly connected to the valve body 111.

[0028] Specifically, the support frame 1 can limit the position and sliding direction of the limiting frame 13. Since the limiting frame 13 and the support frame 1 form a sliding connection, and the pressure sensor 14 is located between the limiting frame 13 and the support frame 1, the weight of the conveying pipe 15 and the material can be monitored by the pressure sensor 14. The pressure sensor 14 is a GTI150. When there is no material inside the conveying pipe 15, the pressure sensor 14 is zeroed to measure the weight of the material. The end plate 16 closes the front and rear ends of the conveying pipe 15 and limits the position of the auger 18. The auger 18 is connected to the bearing 1. Bearing 17 forms a rotatable connection with end plate 16. When the auger 18 rotates, bearing 17 can reduce the relative friction between the auger 18 and end plate 16. The position of drive motor 19 is restricted by fixed bracket 110 so that the shaft of drive motor 19 is fixedly connected to auger 18, thereby driving auger 18 to rotate. Valve body 111 can restrict the position of insert plate 112. The relative position between insert plate 112 and valve body 111 is adjusted by piston 113 driving insert plate 112 to move, so that valve body 111 can be quickly sealed after the material weight reaches the standard to prevent some material from falling into the lower stage equipment.

[0029] In use, the support frame 1 has symmetrical raised structures on its upper part, and the top surface of the raised structures of the support frame 1 has a recessed structure that fits into the limiting frame 13. The limiting frame 13 is symmetrically installed below the conveying pipe 15 with the center of the conveying pipe 15 as the reference. The left and right sides of the limiting frame 13 have symmetrical raised structures. The limiting frame 13 and the support frame 1 form a sliding connection. The pressure sensor 14 is symmetrically installed at the bottom end of the limiting frame 13, and the pressure sensor 14 is located inside the recessed structure at the top of the support frame 1, with its bottom surface in contact with the bottom surface of the recessed structure of the support frame 1. Since the limiting frame 13 and the support frame 1 form a sliding connection, and the pressure sensor 14 is located between the limiting frame 13 and the support frame 1, the weight of the conveying pipe 15 and the material can be monitored by the pressure sensor 14. When there is no material inside the conveying pipe 15, the pressure sensor 14 is zeroed to measure the weight of the material. This method can achieve the weighing... While emphasizing efficiency, the position of the conveying pipe 15 is limited by the limiting frame 13, ensuring that the position of the conveying pipe 15 remains unchanged during the operation of the device, thereby improving the stability of the device. The insert plate 112 and the valve body 111 form a sliding connection, and the end of the insert plate 112 is fitted into the inner wall of the valve body 111. The left end of the insert plate 112 is provided with a symmetrical protrusion structure, and the protrusion structure of the insert plate 112 is fixedly connected to the movable end of the piston 113. The piston 113 is symmetrically installed on the front and rear sides of the protrusion structure of the insert plate 112, and the piston 113 is fixedly connected to the valve body 111. The PLC controller model is PR10. After the material weight reaches the standard, the PLC controller 12 will output a control signal, which will drive the insert plate 112 to move through the piston 113 to adjust the relative position between the insert plate 112 and the valve body 111, so as to quickly seal the valve body 111 after the material weight reaches the standard and prevent some material from falling into the lower-level equipment.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw metering device, characterized in that, include: A support frame (1) is provided, on which a frequency converter (11) is fixedly installed. A PLC controller (12) is fixedly installed above the frequency converter (11). A limit frame (13) is fitted into the upper end of the support frame (1). A pressure sensor (14) is fixedly installed at the bottom end of the limit frame (13). A conveying pipe (15) is fixedly installed above the limit frame (13). End plates (16) are fixedly installed at both ends of the conveying pipe (15). A bearing (17) is fitted into the center of the 6) bearing (17), and an auger (18) is inserted inside the bearing (17). A drive motor (19) is fixedly installed at the left end of the auger (18), and a fixing frame (110) is inserted outside the drive motor (19). A valve body (111) is fixedly installed at the lower end of the conveying pipe (15), and a insert plate (112) is fitted into the valve body (111). A piston (113) is fixedly installed on one side of the insert plate (112).

2. The screw metering device according to claim 1, characterized in that: The support frame (1) is provided with a symmetrical protrusion structure on the upper part, and the top surface of the protrusion structure of the support frame (1) is provided with a recessed structure that fits into the limiting frame (13). The limiting frame (13) is symmetrically installed below the conveying pipe (15) with the center of the conveying pipe (15) as the reference.

3. The screw metering device according to claim 1, characterized in that: The limiting frame (13) has symmetrical protrusions on its left and right sides. The limiting frame (13) and the support frame (1) are connected in a sliding manner. The pressure sensor (14) is symmetrically installed at the bottom of the limiting frame (13) and is located inside the recessed structure at the top of the support frame (1). The bottom surface of the pressure sensor (14) is in contact with the bottom surface of the recessed structure of the support frame (1).

4. The screw metering device according to claim 1, characterized in that: The end plate (16) is fixed to the left and right ends of the conveying pipe (15) by bolts. The auger (18) is rotatably connected to the end plate (16) through the bearing (17). The left end of the auger (18) is fixedly connected to the shaft of the drive motor (19). The outer edge of the auger (18) is in contact with the inner wall of the conveying pipe (15).

5. The screw metering device according to claim 1, characterized in that: The drive motor (19) is fixedly connected to the left end plate (16) via a fixing bracket (110), and the valve body (111) is fixedly connected to the delivery pipe (15) via bolts.

6. The screw metering device according to claim 1, characterized in that: The insert plate (112) and the valve body (111) are connected in a sliding manner, and the end of the insert plate (112) is fitted into the inner wall of the valve body (111). The left end of the insert plate (112) is provided with a symmetrical protrusion structure, and the protrusion structure of the insert plate (112) is fixedly connected to the movable end of the piston (113).

7. The screw metering device according to claim 1, characterized in that: The piston (113) is symmetrically installed on the front and rear sides of the protruding structure of the insert plate (112), and the piston (113) and the valve body (111) are fixedly connected.

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