A bulk grain quantity monitoring device with adjustable scanning radius

Abstract

The present invention relates to a bulk grain quantity monitoring device with adjustable scanning radius, comprising a main cylinder driven by a main cylinder motor and a secondary cylinder driven by a secondary cylinder motor, a secondary cylinder lens is arranged at the bottom of the secondary cylinder, a laser ranging sensor is arranged in the secondary cylinder, and the bulk grain quantity monitoring device comprises a fixed bracket and a rotating bracket, a transverse rotating shaft is rotatably mounted on the rotating bracket, a left side plate of the main cylinder is rotatably mounted on the transverse rotating shaft, a right side plate of the main cylinder is guided and moved along the left and right directions and assembled between the top plate and the bottom plate of the bamboo cylinder, a transmission shaft is axially guided and moved in the transverse rotating shaft, the transmission shaft is connected to the transverse rotating shaft, the secondary cylinder is fixed to the right end of the transmission shaft, a secondary cylinder driving mechanism for driving the secondary cylinder to move left and right is arranged on the rotating bracket, and the secondary cylinder motor is connected to the transverse rotating shaft in a transmission manner. The present invention solves the technical problem in the prior art that the spacing between the secondary cylinder and the rotating axis of the main cylinder is fixed, resulting in a scanning blind area and a limited maximum monitoring radius.

Description

Technical Field

[0001] The invention relates to the technical field of bulk grain storage, and in particular to a bulk grain quantity monitoring device with adjustable scanning radius. Background Art

[0002] In order to avoid the loss of loose grain during storage in grain warehouses, the grain authorities need to grasp the quantity of loose grain in a timely and accurate manner to ensure the safety of grain storage.

[0003] In order to facilitate the quantity monitoring of bulk grain during storage, it is necessary to use corresponding bulk grain quantity monitoring equipment. Existing bulk grain quantity monitoring equipment is such as the "Grain Quantity Monitoring and Silo Video Monitoring Device and System" disclosed in Chinese Patent CN108548483A. The grain quantity monitoring and silo video monitoring device in the public document includes a main cylinder whose rotation axis extends in the up and down directions, and the main cylinder is driven by a main cylinder motor. A secondary cylinder with a horizontally arranged rotation axis is rotatably mounted on the side wall of the main cylinder, and the secondary cylinder is driven by a secondary cylinder motor. A fixing and leveling device for connecting the main cylinder to the silo top is provided at the upper end of the main cylinder, a power supply and a drive controller are provided inside the main cylinder, and an inclination sensor and a laser ranging sensor are provided inside the secondary cylinder. The drive controller controls the main cylinder motor and the secondary cylinder motor.

[0004] The principle of quantity monitoring is described in public documents. Figure 3 As described in detail in the manual, the laser ranging sensor measures the coordinates of the corresponding measuring points on the surface of the grain pile. The main cylinder drives the auxiliary cylinder to rotate, thereby realizing the coordinate measurement of all measuring points on the rotating surface of a certain radius. By adjusting the inclination of the auxiliary cylinder, the measuring radius of the rotating surface can be adjusted.

[0005] Specifically, according to the three-dimensional coordinates of each grain surface point, two adjacent measuring points on the same grain pile section and their projection points on the silo bottom are sequentially formed into a quadrilateral section. The section is rotated a certain angle to form a unit body with the grain quantity monitoring and in-silo video surveillance device installation point and its projection point on the silo bottom as the axis. The volume of the unit body is calculated using the calculus method, and so on, the volume of the grain pile within the area covered by the section is calculated.

[0006] The problem with the existing bulk grain quantity monitoring device is that when the secondary cylinder is arranged vertically and the main cylinder rotates one circle, the rotation radius of a rotation surface scanned by the laser ranging sensor in the secondary cylinder is the minimum monitoring radius of the entire bulk grain quantity monitoring device, and this minimum monitoring radius depends on the distance between the rotation axis of the main cylinder and the secondary cylinder. That is to say, in the prior art, due to the existence of the distance between the secondary cylinder and the rotation axis of the main cylinder, the secondary cylinder has a certain scanning blind area when scanning the surface of the grain pile with the main cylinder. This scanning blind area is the grain pile area corresponding to the lower side of the main cylinder. The existence of this scanning blind area affects the quantity monitoring accuracy of the quantity monitoring device; in addition, since the distance between the secondary cylinder and the rotation axis of the main cylinder is fixed, the maximum monitoring radius of the quantity monitoring device is also limited. Summary of the invention

[0007] The purpose of the present invention is to provide a bulk grain quantity monitoring device with adjustable scanning radius, so as to solve the technical problems in the prior art that the spacing between the rotation axes of the secondary cylinder and the main cylinder is fixed, resulting in a scanning blind area and a limited maximum monitoring radius.

[0008] In order to solve the above technical problems, the technical solution of a bulk grain quantity monitoring device with adjustable scanning radius in the present invention is as follows:

[0009] A bulk grain quantity monitoring device with adjustable scanning radius comprises a main cylinder driven by a main cylinder motor and a secondary cylinder driven by a secondary cylinder motor, a secondary cylinder lens is arranged at the bottom of the secondary cylinder, a laser ranging sensor is arranged in the secondary cylinder, and the bulk grain quantity monitoring device comprises a fixed bracket and a swivel bracket with a rotation axis extending in the up-down direction, a transverse rotation axis horizontally arranged on the swivel bracket is rotatably mounted, a left side plate of the main cylinder is rotatably mounted on the transverse rotation axis, a right side plate of the main cylinder is guided and moved in the left-right direction and assembled between the top plate and the bottom plate of the main cylinder, a transmission shaft is axially guided and moved in the transverse rotation axis in the transverse rotation axis, the transmission shaft is non-rotatably connected to the transverse rotation axis, the secondary cylinder is fixed to the right end of the transmission shaft, a secondary cylinder driving mechanism for driving the secondary cylinder to move left and right is arranged on the swivel bracket, the secondary cylinder motor is transmission-connected to the transverse rotation axis, a main cylinder lens is arranged on the bottom plate of the main cylinder, and a secondary cylinder outer square head structure for non-rotatably plugging with the right side plate of the main cylinder is arranged at the left end of the secondary cylinder.

[0010] Furthermore, a main cylinder inner square hole is provided on the right side surface of the right side plate of the main cylinder to achieve non-rotating plug-in connection with the outer square head structure of the auxiliary cylinder in the left and right directions, and a transmission shaft guide hole is provided at the bottom of the main cylinder inner square hole to cooperate with the guiding movement of the right end of the transmission shaft in the left and right directions. The transmission shaft guide hole is a circular hole that cooperates with the rotation of the transmission shaft.

[0011] Furthermore, a side plate return spring is provided between the left side plate of the main cylinder and the right side plate of the main cylinder.

[0012] Furthermore, during the movement of the auxiliary cylinder to the left, the right side plate that pushes the main cylinder moves to the left to move the auxiliary cylinder to the first station in the main cylinder; during the movement of the auxiliary cylinder to the right, it has a second station that is separated from the right side plate of the main cylinder.

[0013] Furthermore, a left side plate is fixed on the right side plate of the auxiliary cylinder, and a secondary cylinder sealing plate is used to contact and cooperate with the right ends of the top plate and bottom plate of the main cylinder. The auxiliary cylinder driving mechanism is connected to the auxiliary cylinder sealing plate to drive the auxiliary cylinder to move left and right.

[0014] Furthermore, the auxiliary cylinder driving mechanism includes a horizontal motor arranged on a rotating bracket, a driving screw is connected to the motor shaft of the horizontal motor, a movable nut is threadedly connected to the driving screw, and a nut push plate located on the left and right sides of the auxiliary cylinder sealing plate is fixed to the lower end of the movable nut, and the auxiliary cylinder sealing plate can rotate with the auxiliary cylinder relative to the nut push plate.

[0015] Furthermore, a guide rod arranged in parallel with the driving lead screw is provided on the swivel bracket, and the movable nut cooperates with the guide rod to guide the movement.

[0016] Furthermore, the transmission shaft passes through the transverse rotating shaft in the left-right direction, and the left end of the transmission shaft is provided with a transmission shaft stop edge for cooperating with the left end stop of the transverse rotating shaft to limit the rightward movement limit of the secondary cylinder.

[0017] Furthermore, a first pulley is fixed on the motor shaft of the secondary cylinder motor, a second pulley is fixed on the transverse rotating shaft, and the first pulley and the second pulley are connected via a transmission belt.

[0018] The beneficial effects of the present invention are as follows: in the present invention, the auxiliary cylinder can move left and right under the drive of the auxiliary cylinder driving mechanism. When it is necessary to scan the grain pile area directly below the main cylinder, the auxiliary cylinder can move to the left, and the auxiliary cylinder pushes the right side plate of the main cylinder. The auxiliary cylinder and the right side plates of the main cylinder move into the inside of the main cylinder. At this time, the laser emitted by the laser ranging sensor can pass through the auxiliary cylinder lens and the main cylinder lens, thereby realizing the scanning of the grain pile area directly below the main cylinder. Of course, at this time, when the auxiliary cylinder is adjusted in pitch angle, since the outer square head structure of the auxiliary cylinder is connected to the right side plate of the main cylinder with a rotation-stopping connection, the auxiliary cylinder is adjusted in pitch angle during the process. It will also rotate synchronously with the main cylinder around its own rotation axis, so that although the auxiliary cylinder is inside the main cylinder, the main cylinder will not block the auxiliary cylinder during the pitch angle adjustment of the auxiliary cylinder; when it is necessary to increase the scanning area range of the bulk grain quantity monitoring device, the auxiliary cylinder driving mechanism drives the auxiliary cylinder to move right, and the auxiliary cylinder moves out from the right main cylinder, and the auxiliary cylinder outer structure on the auxiliary cylinder is separated from the right side plate of the main cylinder. At this time, when the auxiliary cylinder is adjusted for pitch angle, the scanning radius of the bulk grain quantity monitoring device will increase, and when the auxiliary cylinder is adjusted for pitch angle, it will not rotate with the main cylinder, thereby reducing the energy consumption of the auxiliary cylinder motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0020] Figure 1 It is a schematic structural diagram of an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the state after the outer square head structure of the auxiliary cylinder contacts the inner square hole of the main cylinder during the process of the auxiliary cylinder moving to the left in the embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the state after the auxiliary cylinder moves leftward into the main cylinder in the present invention;

[0023] Figure 4 yes Figure 1 A schematic diagram of the structure of the right side plate of the middle main barrel;

[0024] Figure 5 yes Figure 1 Schematic diagram of the cooperation between the movable nut and the auxiliary cylinder sealing plate;

[0025] 1. Fixed bracket; 2. Bracket shaft; 3. Main barrel motor; 4. Main barrel motor shaft gear; 5. First pulley; 6. Auxiliary barrel motor; 7. Transmission belt; 8. Horizontal rotating shaft; 9. Transmission shaft stop edge; 10. Transmission shaft; 11. Second pulley; 12. Left side plate of main barrel; 13. Side plate reset spring; 14. Bottom plate of main barrel; 15. Main barrel lens; 16. Right side plate of main barrel; 17. Square hole in main barrel; 18. Auxiliary barrel lens; 19. Auxiliary barrel sealing plate; 20. Laser ranging sensor; 21. Auxiliary barrel outer square head structure; 22. Main barrel; 23. Auxiliary barrel; 24. Screw nut push plate; 25. Driving screw rod; 26. Moving screw nut; 27. Rotating bracket; 28. Horizontal motor; 29. ​​Transmission shaft guide hole; 30. Guide rod; 31. Bracket shaft gear; 32. Rotating bracket top plate; 33. Rotating bracket side plate. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are provided in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0027] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0028] An embodiment of a bulk grain quantity monitoring device with adjustable scanning radius in the present invention is as follows: Figures 1 to 5 As shown: It includes a fixed bracket 1 and a swivel bracket 27 with a rotation axis extending in the up-down direction. When in use, the fixed bracket is fixed to the top of the granary by bolts. The swivel bracket 27 includes a bracket shaft 2 rotatably matched with the fixed bracket. The axis of the bracket shaft 2 extends in the up-down direction. A swivel bracket top plate 32 is fixed to the bottom of the bracket shaft. A vertically arranged swivel bracket side plate 33 is fixed to one end of the swivel bracket top plate 32. A transverse rotating shaft 8 with a horizontally arranged rotation axis is rotatably mounted on the swivel bracket side plate 33.

[0029] The bulk grain quantity monitoring device also includes a main cylinder 22 driven by a main cylinder motor 3 and a secondary cylinder 23 driven by a secondary cylinder motor 6, a secondary cylinder lens 18 is arranged at the bottom of the secondary cylinder, and a laser ranging sensor 20 is arranged in the secondary cylinder. A transverse rotating shaft 8 with a rotating axis horizontally arranged is rotatably mounted on the rotating bracket side plate 33 of the rotating bracket, and the main cylinder is composed of a top plate of the main cylinder, a bottom plate 14 of the main cylinder, a left side plate 12 of the main cylinder, a right side plate 16 of the main cylinder, a front side plate of the main cylinder and a rear side plate of the main cylinder, wherein the left side plate 12 of the bamboo cylinder is rotatably connected to the transverse rotating shaft 8, and the right side plate 16 of the main cylinder is guided and moved along the left and right directions and assembled between the top plate of the main cylinder, the bottom plate of the main cylinder, the front side plate of the main cylinder, and the rear side plate of the main cylinder, and the right side plate of the main cylinder is a square plate, so the right side plate of the main cylinder cannot rotate relative to the top plate and the bottom plate of the main cylinder. A reset torsion spring is arranged between the main cylinder and the side plate of the slewing bracket. When the main cylinder is not subjected to other forces, the main cylinder will be reset to a vertical posture under the action of the reset torsion spring.

[0030] A transmission shaft 10 is assembled inside the transverse shaft along the axial guide of the transverse shaft. The transmission shaft 10 passes through the entire transverse shaft along the axial direction of the transverse shaft. The transmission shaft is connected to the transverse shaft to prevent rotation. In this embodiment, the inner hole of the transverse shaft is a square hole, and the part of the transmission shaft that cooperates with the square hole guide is a square shaft. Therefore, the transverse shaft cannot rotate relative to the transmission shaft.

[0031] The left side plate of the secondary cylinder is fixed to the right end of the transmission shaft 10, and a secondary cylinder driving mechanism for driving the secondary cylinder to move left and right is arranged on the rotating bracket. The secondary cylinder motor 6 is connected to the horizontal rotating shaft 8 in a transmission manner. The main cylinder lens 15 is arranged on the bottom plate of the main cylinder, and the left end of the secondary cylinder is provided with a secondary cylinder outer square head structure 21 for anti-rotation plugging with the right side plate of the main cylinder. The right side surface of the right side plate of the main cylinder is provided with a main cylinder inner square hole for realizing anti-rotation plugging with the secondary cylinder outer square head structure in the left and right directions. The cross section of the main cylinder inner square hole is a hexagonal hole, and the secondary cylinder outer square head is a hexagonal structure adapted to the main cylinder inner square hole.

[0032] The bottom of the square hole in the main barrel is provided with a transmission shaft guide hole 29 for guiding and moving the transmission shaft in the left and right directions. The transmission shaft guide hole 29 is a circular hole for rotating with the transmission shaft 10. A side plate return spring 13 is provided between the left plate of the main barrel and the right plate of the main barrel. There are two pairs of side plate return springs 13, which are arranged up and down. The two side plate return springs in each pair of side plate return springs are located at the front and rear sides of the laser ranging sensor 20.

[0033] During the movement of the auxiliary cylinder 23 to the left, the right side plate that pushes the main cylinder moves to the left to move the auxiliary cylinder to the first station in the main cylinder; during the movement of the auxiliary cylinder to the right, it has a second station that is separated from the right side plate of the main cylinder.

[0034] The right side plate of the secondary cylinder is fixed with a secondary cylinder sealing plate 19 whose left side plate is used to contact and cooperate with the top plate of the main cylinder and the right end of the bottom plate of the main cylinder. The secondary cylinder driving mechanism is connected to the secondary cylinder sealing plate to drive the secondary cylinder to move left and right. In this embodiment, the secondary cylinder driving mechanism includes a horizontal motor 28 arranged on a slewing bracket, a driving screw 25 is connected to the motor shaft of the horizontal motor, and a moving screw nut 26 is threadedly connected to the driving screw 25. The lower end of the moving screw nut is fixed with a screw nut push plate 24 located on the left and right sides of the secondary cylinder sealing plate. The secondary cylinder sealing plate can rotate with the secondary cylinder relative to the screw nut push plate, that is, the secondary cylinder sealing plate 19 is located between the two screw nut push plates 24, and the two screw nut push plates 24 can be used to move the secondary cylinder sealing plate 19 left and right, but the two screw nut push plates 24 do not affect the rotation of the secondary cylinder sealing plate with the secondary cylinder when the pitch angle of the secondary cylinder is adjusted.

[0035] The swivel bracket is provided with two guide rods 30 arranged in parallel with the driving screw rod, and the movable screw nut 26 cooperates with the guide rods 30 to guide the movement.

[0036] The left end of the transmission shaft 10 is provided with a transmission shaft stop edge 9 for cooperating with the left end stop of the transverse rotating shaft to limit the rightward movement limit of the secondary cylinder.

[0037] The auxiliary cylinder motor 6 is arranged on the rotating bracket 27, the motor shaft of the auxiliary cylinder motor 6 is fixed with a first pulley 5, the transverse rotating shaft is fixed with a second pulley 11, and the first pulley 5 and the second pulley 11 are connected by a transmission belt 7. The main cylinder motor 3 is arranged on the fixed bracket, the motor shaft of the main cylinder motor is provided with a motor shaft gear, the bracket shaft is provided with a bracket shaft gear 31, and the motor shaft gear and the bracket shaft gear 31 are meshed and transmitted.

[0038] When in use, when the auxiliary cylinder is set vertically, the slewing bracket rotates one circle to achieve a minimum scanning radius. The auxiliary cylinder motor drives the auxiliary cylinder to adjust the pitch angle within 75°. The pitch angle refers to the angle between the auxiliary cylinder and the vertical axis. For each left and right position of the auxiliary cylinder, when the auxiliary cylinder pitch angle is 75°, it can achieve the maximum scanning radius. When the scanning radius is large, such as Figure 1 As shown, the driving screw drives the moving nut to move rightward, and the moving nut drives the auxiliary cylinder sealing plate and the auxiliary cylinder to move rightward through the nut push plate, and the auxiliary cylinder is spaced apart from the main cylinder. At this time, the auxiliary cylinder motor drives the transverse shaft to rotate through the transmission belt, and the transverse shaft drives the auxiliary cylinder to adjust the auxiliary cylinder pitch angle through the transmission shaft. There is a movable gap between the upper end of the auxiliary cylinder sealing plate and the moving nut, so the moving nut will not hinder the rotation of the auxiliary cylinder sealing plate. The main cylinder motor drives the rotary bracket to rotate, and the laser distance sensor in the auxiliary cylinder can scan the surface of the grain pile.

[0039] When it is necessary to reduce the scanning radius, for example, when scanning the lower side of the main cylinder, the moving nut moves to the left with the auxiliary cylinder sealing plate through the nut pushing plate, and the auxiliary cylinder sealing plate moves to the left together with the auxiliary cylinder, and the auxiliary cylinder outer square head structure at the left end of the auxiliary cylinder is inserted into the inner square hole of the main cylinder. At this time, the auxiliary cylinder is connected with the right side plate of the main cylinder for rotation. As the auxiliary cylinder continues to move to the left, the auxiliary cylinder pushes the right side plate of the main cylinder and moves to the left until the auxiliary cylinder sealing plate presses against the top plate of the main cylinder and the right end of the bottom plate of the main cylinder. At this time, the auxiliary cylinder moves to the inside of the main cylinder. When the auxiliary cylinder is in a vertical posture, the laser ranging sensor is closest to the axis of the rotating bracket. At this time, the scanning radius of the bulk grain quantity monitoring device is the smallest. If the auxiliary cylinder needs to adjust the pitch angle, it only needs the auxiliary cylinder motor to drive the auxiliary cylinder to rotate through the transmission belt, and at this time the main cylinder rotates with the auxiliary cylinder, so it can be avoided that the auxiliary cylinder rotates relative to the main cylinder, which causes the laser emitted by the laser ranging sensor to be blocked by the front side plate of the main cylinder and the rear side plate of the main cylinder. In addition, this state can also serve as the storage state of the auxiliary cylinder. When bulk grain is put into and taken out of the warehouse, dust can be prevented from adhering to the auxiliary cylinder lens, thereby reducing the impact on laser emission. When the auxiliary cylinder is moved out from the inside of the main cylinder, the laser ranging sensor can still be used normally.

[0040] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0041] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0042] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bulk grain quantity monitoring device with adjustable scanning radius, comprising a main cylinder driven by a main cylinder motor and a secondary cylinder driven by a secondary cylinder motor, a secondary cylinder lens is arranged at the bottom of the secondary cylinder, and a laser ranging sensor is arranged in the secondary cylinder, characterized in that: The bulk grain quantity monitoring device includes a fixed bracket and a rotating bracket with a rotating axis extending in the up and down directions, a transverse rotating shaft arranged horizontally along the rotating axis is rotatably installed on the rotating bracket, the left side plate of the main cylinder is rotatably installed on the transverse rotating shaft, the right side plate of the main cylinder is guided and moved in the left and right directions and is installed between the top plate and the bottom plate of the main cylinder, a transmission shaft is installed in the transverse rotating shaft along the axial direction of the transverse rotating shaft, the transmission shaft is connected to the transverse rotating shaft for locking, the secondary cylinder is fixed to the right end of the transmission shaft, a secondary cylinder driving mechanism for driving the secondary cylinder to move left and right is arranged on the rotating bracket, the secondary cylinder motor is connected to the transverse rotating shaft for transmission, a main cylinder lens is arranged on the bottom plate of the main cylinder, a secondary cylinder outer square head structure for locking and plugging with the right side plate of the main cylinder is arranged on the left end of the secondary cylinder, a main cylinder inner square hole for locking and plugging with the secondary cylinder outer square head structure in the left and right directions is arranged on the right side surface of the right side plate of the main cylinder, and a main cylinder inner square hole for realizing locking and plugging with the secondary cylinder outer square head structure in the left and right directions is arranged at the bottom of the main cylinder inner square hole The guide hole of the transmission shaft for guiding movement is a circular hole that cooperates with the rotation of the transmission shaft. A side plate return spring is arranged between the left plate of the main cylinder and the right plate of the main cylinder. During the movement of the auxiliary cylinder to the left, the right plate of the main cylinder is pushed to move to the left, so that the auxiliary cylinder moves to the first station in the main cylinder; during the movement of the auxiliary cylinder to the right, it has a second station that is disengaged from the right plate of the main cylinder. A secondary cylinder sealing plate is fixed on the right plate of the auxiliary cylinder, and the left plate surface of the secondary cylinder sealing plate is used to contact and cooperate with the right ends of the top plate and the bottom plate of the main cylinder. The auxiliary cylinder driving mechanism is connected to the secondary cylinder sealing plate for driving the auxiliary cylinder to move left and right. The auxiliary cylinder driving mechanism includes a horizontal motor arranged on a rotating bracket, a driving screw is connected to the motor shaft of the horizontal motor, and a moving nut is threadedly connected to the driving screw, and the lower end of the moving nut is fixed with nut pushing plates located on the left and right sides of the auxiliary cylinder sealing plate, and the auxiliary cylinder sealing plate can rotate with the auxiliary cylinder relative to the nut pushing plate.

2. The bulk grain quantity monitoring device according to claim 1, characterized in that: A guide rod which is arranged in parallel with the driving lead screw is arranged on the slewing bracket, and the movable lead screw nut cooperates with the guide rod for guiding movement.

3. The bulk grain quantity monitoring device according to claim 1 or 2, characterized in that: The transmission shaft penetrates the transverse rotating shaft in the left-right direction, and the left end of the transmission shaft is provided with a transmission shaft stop edge for cooperating with the left end stop of the transverse rotating shaft to limit the rightward movement limit of the secondary cylinder.

4. The device for monitoring the quantity of loose grain according to claim 3, characterized in that: A first pulley is fixed on the motor shaft of the secondary cylinder motor, a second pulley is fixed on the transverse rotating shaft, and the first pulley and the second pulley are connected through a transmission belt.

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