Drying quantity detection device of grain dryer

Abstract

The invention relates to a drying quantity detection device of a grain dryer, which is used for solving the technical problem that a weighing sensor is easily influenced by high temperature to influence measurement and damage the sensor. Three lever mechanisms are evenly distributed on each stock bin in the circumferential direction, each lever mechanism comprises a lever and a supporting base, the middle of each lever is hinged to the corresponding supporting base, the lower end of each supporting base is fixed relative to the fixed rack, the levers are arranged in the radial direction of the corresponding stock bins, and the front ends of the levers extend to the positions below the corresponding stock bins so that the lower ends of the stock bins can press the front ends of the levers. The rear end of the lever extends in the direction away from the stock bin. The weighing sensors and the levers are arranged in a one-to-one correspondence mode, the lower ends of the weighing sensors abut against the upper portions of the rear ends of the levers in a matched mode, and the upper ends of the weighing sensors are installed on a fixed rack. When the levers are in the horizontal state, the lower end of the stock bin and the lower ends of the weighing sensors make contact with the levers respectively, and force is transmitted to the three corresponding weighing sensors through the three corresponding levers so that the grain weight can be calculated.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of drying quantity detection devices of grain dryer. BACKGROUND

[0002] In the field of grain storage, grain needs to be dried before entering the warehouse, and the amount of grain entering the warehouse through the dryer needs to be known at the same time. Therefore, a dryer with grain quantity detection function is generally used to measure the dried grain directly online. Since the grain is in a continuous flow state during drying, the impact kinetic energy of the flowing grain can affect the accuracy of the weighing. Therefore, a structure that alternately receives the dried grain in two hoppers to perform static weighing can be used, i.e., an electric flap valve is arranged at the outlet of the dryer to switch the flow channel, and a hopper is arranged below each flow channel to receive the dried grain. The hoppers are alternately connected, weighed, and discharged. The hoppers are supported and weighed by three-point load cells. However, since the dried grain is at a high temperature, and hot air also enters the hopper with the grain, the load cells supported below the hopper are easily affected by high temperature, causing thermal deformation of the elastomer, melting of the coating material, and opening of the welding points, which further affects the measurement accuracy and even damages the sensor. Therefore, the traditional method considers heat insulation treatment or active air cooling for the load cell. The heat insulation treatment can only be effective for a period of time, but since the grain drying and weighing process is continuous, the load cell will still be affected by high temperature after a period of time. The active air cooling method consumes a lot of energy and may introduce low temperature due to continuous air blowing, affecting the drying efficiency of the dryer. SUMMARY

[0003] The present application aims to provide a drying quantity detection device for a grain dryer to solve the technical problem of the load cell being easily affected by high temperature, affecting the measurement and damaging the sensor.

[0004] The technical solution of the present application is as follows: a drying quantity detection device for a grain dryer includes: a discharge pipe, the upper end of which is connected to the outlet of the dryer, and the lower end is divided into two symmetrical discharge flow channels, an electric flap valve is arranged at the upper end of each discharge flow channel to alternately connect the outlet of the dryer to the two discharge flow channels; two hoppers, each arranged below a discharge flow channel, the hopper includes an inlet and an outlet, the inlet is connected below the corresponding discharge flow channel, and a discharge valve is arranged at the outlet; a lever mechanism, three lever mechanisms are evenly distributed around each hopper, the lever mechanism includes a lever and a support seat, the middle of the lever is hinged to the support seat, the lower end of the support seat is fixed relative to the fixed frame, the lever is arranged along the radial direction of the corresponding hopper, the front end of the lever extends below the corresponding hopper so that the lower end of the hopper is pressed on the front end of the lever, and the rear end of the lever extends away from the hopper; Weighing sensors are set one-to-one with levers. The lower end of the weighing sensor abuts against the upper part of the rear end of the lever. The upper end of the weighing sensor is mounted on a fixed frame. When the lever is in a horizontal state, the lower end of the hopper and the lower end of the weighing sensor are in contact with the lever. After the silo is filled with grain, the force is transmitted to three corresponding weighing sensors through three levers to calculate the weight of the grain in the silo.

[0005] The beneficial effects of this technical solution are as follows: During operation, the grain continuously passes through the dryer and falls from its outlet. Through the alternating switching of an electric flap valve, the grain falls into corresponding hoppers from two different discharge channels. After a period of time, when the hopper is estimated to be nearly full, the electric flap valve automatically switches to another discharge channel under a preset program, feeding another hopper. The hopper that is already full can be weighed multiple times. The average weight of the hopper is obtained by taking the average of these multiple weighings. Subtracting the weight of the hopper itself gives the weight of the grain in that weighing operation. The weighing of the hopper uses a lever mechanism to transmit force to the weighing sensor. This allows the weighing sensor to be positioned at the rear end of the lever, thus moving the weighing sensor closer to the lever. The high-temperature zone of the silo is moved to a low-temperature zone away from the silo to prevent the heat from the grain inside the silo from being transferred to the weighing sensor through conduction and radiation. The lever can be set with the support base in the center to transmit force one-to-one, or the position of the support base can be changed to achieve a proportional reduction in force, so that a smaller range and more accurate weighing sensor can be used for measurement, or the force can be proportionally amplified to utilize a larger range weighing sensor that is less prone to damage. Moreover, the design of indirectly transmitting force to the weighing sensor through the lever mechanism also makes it easy to set a buffer mechanism on the lever mechanism to buffer the swing of the lever, so as to offset the impact of the grain entering the silo on the lever and prevent this impact from being directly transmitted to the weighing sensor and affecting the service life of the weighing sensor.

[0006] Based on the above scheme, further improvements are made as follows: a stop and buffer mechanism is provided in the area between the rear end of each lever and the support seat. The stop and buffer mechanism includes a vertically arranged telescopic rod. The lower end of the telescopic rod is engaged with the lever, and the upper end of the telescopic rod is installed on a fixed frame. When the grain falls into the hopper, the telescopic rod extends, and when weighing, the telescopic rod shortens.

[0007] The beneficial effects of this technical solution are as follows: By setting up a stop and buffer mechanism, when feeding grain into the hopper, the telescopic rod of the stop and buffer mechanism can push against the lever, so that the weighing sensor is temporarily suspended. This avoids the impact of the grain being transmitted to the weighing sensor through the lever, thus protecting the weighing sensor. After feeding is completed, the telescopic rod is slowly retracted so that the lever slowly contacts the weighing sensor, thereby performing static measurement without impact.

[0008] Based on the above solution, the following improvement is made: an elastic post is provided at the lower end of the telescopic rod. Because the uneven impact of the grain on the hopper during feeding causes the lever to vibrate, the vibration of the lever can be buffered and the telescopic rod protected by setting an elastic post at the lower end of the telescopic rod to contact the lever.

[0009] Based on the above solution, the following further improvement is made: the lower end of the load cell is engaged with a lever via an elastic element. This elastic element can buffer vibration and protect the load cell.

[0010] Based on the above solution, further improvements are made as follows: a downward-protruding support ring is provided at the lower edge of the hopper, through which the hopper contacts the lever. By setting the support ring, wear can be prevented at the contact point between the lower part of the hopper and the lever. After setting the support ring, it can be replaced directly when it wears out, without replacing the hopper, thus reducing costs.

[0011] Based on the above solution, further improvements are made as follows: the support ring is made of an elastic material. The elastic material can absorb vibrations during material feeding and also reduce its own wear, extending its service life.

[0012] Based on the above solution, further improvements are made as follows: the length of the lever is not less than the diameter of the hopper. This allows the weighing sensor to be moved to the low-temperature region as much as possible.

[0013] Based on the above solution, further improvements are made as follows: the upper part of the support base is U-shaped, and the lever is hinged to the U-shaped structure on the upper part of the support base via a hinge shaft. The U-shaped structure limits the lever to swinging only up and down, preventing horizontal rotation of the lever.

[0014] Based on the above solution, further improvements are made as follows: the horizontal width of the lever is greater than its vertical thickness. This maximizes the contact area between the lever and the hopper and weighing sensor, preventing slippage of the mating surfaces. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of a specific embodiment of the grain dryer quantity detection device of the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 A magnified view of a section at point B in the middle; Figure 4 This is a top view of the support ring and lever mechanism in action. Figure 5 for Figure 4 A magnified view of a section at point C; In the diagram: 1-feeding pipe, 11-feeding channel, 111-valve plate and stop block, 12-electric flap valve, 121-buffer section, 2-hopper, 21-inlet, 22-outlet, 221-discharge valve, 23-support ring, 3-lever mechanism, 31-lever, 32-support seat, 321-U-shaped structure, 322-hinge shaft, 4-weighing sensor, 41-elastic element, 5-stopping and buffering mechanism, 51-telescopic rod, 52-elastic column, 6-frame, 7-grain storage bin. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0018] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0019] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0020] Specific embodiments of the grain dryer quantity detection device of the present invention: as follows Figures 1-5 As shown, the grain dryer's drying quantity detection device includes a feeding pipe 1, a hopper 2, a lever mechanism 3, and a weighing sensor 4.

[0021] The upper end of the feed pipe 1 connects to the outlet of the dryer, and the lower end is divided into two symmetrically arranged feed channels 11. An electric flap valve 12 is installed at the upper end of each feed channel 11 to allow the dryer outlet to alternately connect with the two feed channels 11. The electric flap valve 12 includes a geared motor, a drive shaft, and a flap, etc. The geared motor drives the flap to rotate. Figure 1 As shown, when flipped to the left, the right-side discharge channel 11 is open, and when flipped to the right, the left-side discharge channel 11 is open. The inner wall of the discharge channel 11 is provided with a valve plate and a stop block that cooperates with the flip plate.

[0022] Two hoppers 2 are respectively located below two discharge channels 11. Each hopper 2 includes an inlet 21 and an outlet 22. The inlet 21 is connected to the corresponding discharge channel 11 below. The outlet 22 is equipped with a discharge valve 221, which is an electric shut-off valve.

[0023] like Figure 4 As shown, each hopper 2 has three lever mechanisms 3 evenly distributed circumferentially. Each lever mechanism 3 includes a lever 31 and a support base 32. The middle of the lever 31 is hinged to the support base 32, and the lower end of the support base 32 is fixed relative to the fixed frame 6. The lever 31 is arranged radially along the corresponding hopper 2, with its front end extending below the corresponding hopper 2 so that the lower end of the hopper 2 presses against the front end of the lever 31. The rear end of the lever 31 extends away from the hopper 2. A downwardly protruding support ring 23 is provided at the lower edge of the hopper 2, through which the hopper 2 contacts the lever 31. By providing the support ring 23, wear at the contact point between the lower part of the hopper 2 and the lever 31 can be prevented. With the support ring 23, it can be directly replaced when worn, without replacing the hopper 2, thus reducing costs. The support ring 23 is made of an elastic material. The elastic material can absorb vibration during feeding and also slow down its own wear, extending its service life.

[0024] Weighing sensors 4 are set one-to-one with levers 31. The lower end of weighing sensor 4 abuts against the upper part of the rear end of lever 31, and the upper end of weighing sensor 4 is mounted on a fixed frame 6. When lever 31 is in a horizontal state, the lower end of hopper 2 and the lower end of weighing sensor 4 are in contact with lever 31 respectively. After hopper 2 is filled with grain, the force is transmitted to the three corresponding weighing sensors 4 through the three corresponding levers 31 to calculate the weight of grain in hopper 2.

[0025] A stop and buffer mechanism 5 is provided in the area between the rear end of each lever 31 and the support base 32. The stop and buffer mechanism 5 includes a vertically arranged telescopic rod 51, which can be a hydraulic cylinder controlled by a hydraulic system. The lower end of the telescopic rod 51 abuts against the lever 31, and the upper end of the telescopic rod 51 is mounted on a fixed frame 6. When grain falls into the hopper 2, the telescopic rod 51 extends; during weighing, the telescopic rod 51 retracts. By setting up the stop and buffer mechanism 5, when grain is fed into the hopper 2, the telescopic rod 51 of the stop and buffer mechanism 5 abuts against the lever 31, so that the weighing sensor 4 is temporarily suspended, thereby preventing the impact of the grain from being transmitted to the weighing sensor 4 through the lever 31, thus protecting the weighing sensor 4. After feeding is completed, the telescopic rod 51 is slowly retracted so that the lever 31 slowly contacts the weighing sensor 4, thereby performing static measurement without impact. The lower end of the telescopic rod 51 is provided with an elastic column 52, such as a rubber column. When grain is fed into hopper 2, the uneven impact of the grain on hopper 2 causes the lever 31 to vibrate. By placing an elastic post 52 at the lower end of the telescopic rod 51 in contact with the lever 31, the vibration of the lever 31 can be buffered, and the telescopic rod 51 can be protected. The length of the lever 31 is not less than the diameter of hopper 2. This allows the load cell 4 to be moved to a low-temperature region as much as possible. The upper part of the support base 32 is U-shaped, and the lever 31 is hinged to the U-shaped structure 321 on the upper part of the support base 32 via a hinge shaft 322. The U-shaped structure 321 limits the lever 31 to swinging only up and down, preventing horizontal rotation. The horizontal width of the lever 31 is greater than its vertical thickness. This maximizes the contact area between the lever 31 and hopper 2 and load cell 4, preventing slippage of the mating surfaces.

[0026] The lower end of the load cell 4 is engaged with the lever 31 via an elastic element 41. The elastic element 41 can buffer vibration and protect the load cell 4. The elastic element 41 can be a spring or an elastic rubber component.

[0027] When the grain dryer's drying quantity detection device is in use, the grain continuously passes through the dryer and falls from the dryer's outlet. Through the alternating switching of the electric flap valve 12, the grain falls from two different discharge channels 11 into corresponding hoppers 2. After a period of time, when it is estimated that hopper 2 is about to be full, under the control of a preset program, the electric flap valve automatically switches to another discharge channel to feed into another hopper 2. The hopper 2 that is already full can be weighed multiple times. The average value of the multiple weighings is the weight of the hopper 2. Subtracting the weight of the hopper 2 itself gives the weight of the grain in that weighing. The weighing of hopper 2 uses a lever mechanism 3 to transmit force to the weighing sensor 4. This allows the weighing sensor 4 to be positioned at the rear end of the lever 31, thus moving the weighing sensor 4 from the high-temperature area near the hopper 2. The lever 31 is moved to a low-temperature area away from the silo 2 to avoid the heat from the grain inside the silo 2 being transferred to the weighing sensor 4 through conduction and radiation. The lever 31 can be set with the support base 32 in the center to transmit force one-to-one, or the position of the support base 32 can be changed to achieve proportional reduction of force, so that a smaller range and more accurate weighing sensor 4 can be used for measurement, or the force can be proportionally amplified to use a larger range weighing sensor 4 that is less prone to damage. Moreover, the design of indirectly transmitting force to the weighing sensor 4 through the lever mechanism 3 also makes it convenient to set a buffer mechanism on the lever mechanism 3 to buffer the swing of the lever 31, so as to offset the impact of the grain entering the silo 2 on the lever 31, and avoid this impact being directly transmitted to the weighing sensor 4 and affecting the service life of the weighing sensor 4.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A grain dryer drying quantity detection device, comprising: The upper end of the feeding pipe is connected to the outlet of the dryer, and the lower end is divided into two symmetrically arranged feeding channels. The upper end of the two feeding channels is equipped with an electric flap valve so that the outlet of the dryer can be alternately connected to the two feeding channels. Two hoppers are located below two discharge channels. Each hopper includes an inlet and an outlet. The inlet is connected to the corresponding discharge channel below, and the outlet is equipped with a discharge valve. Its characteristic is that it further includes: The lever mechanism consists of three lever mechanisms evenly distributed circumferentially in each hopper. Each lever mechanism includes a lever and a support base. The middle of the lever is hinged to the support base. The lower end of the support base is fixed relative to the fixed frame. The lever is arranged radially along the corresponding hopper. The front end of the lever extends to the bottom of the corresponding hopper so that the lower end of the hopper presses on the front end of the lever. The rear end of the lever extends away from the hopper. Weighing sensors are set one-to-one with levers. The lower end of the weighing sensor abuts against the upper part of the rear end of the lever. The upper end of the weighing sensor is mounted on a fixed frame. When the lever is in a horizontal state, the lower end of the hopper and the lower end of the weighing sensor are in contact with the lever. After the silo is filled with grain, the force is transmitted to three corresponding weighing sensors through three levers to calculate the weight of the grain in the silo.

2. The grain dryer quantity detection device according to claim 1, characterized in that, Each lever has a stop and buffer mechanism in the area between its rear end and the support seat. The stop and buffer mechanism includes a vertically arranged telescopic rod. The lower end of the telescopic rod is engaged with the lever, and the upper end of the telescopic rod is installed on a fixed frame. When the grain falls into the hopper, the telescopic rod extends, and when weighing, the telescopic rod shortens.

3. The grain dryer quantity detection device according to claim 2, characterized in that, The lower end of the telescopic rod is equipped with an elastic post.

4. The grain dryer quantity detection device according to claim 1, characterized in that, The lower end of the load cell is engaged with the lever via an elastic element.

5. The grain dryer quantity detection device according to claim 1, characterized in that, The lower edge of the hopper is provided with a downward-protruding support ring, through which the hopper contacts the lever.

6. The grain dryer quantity detection device according to claim 5, characterized in that, The support ring is made of an elastic material.

7. The grain dryer quantity detection device according to claim 1, characterized in that, The length of the lever is not less than the diameter of the hopper.

8. The grain dryer quantity detection device according to claim 1, characterized in that, The upper part of the support base is U-shaped, and the lever is hinged to the U-shaped structure on the upper part of the support base via a hinge shaft.

9. The grain dryer quantity detection device according to claim 1, characterized in that, The horizontal width of the lever is greater than its vertical thickness.

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