CN112503922B

CN112503922B - Bidirectional overload adjusting device of drying machine

Info

Publication number: CN112503922B
Application number: CN202011304675.7A
Authority: CN
Inventors: 张书宏; 叶新国; 张利
Original assignee: Hefei Sanwu Mechanical Co ltd
Current assignee: Hefei Sanwu Mechanical Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2022-07-12
Anticipated expiration: 2040-11-19
Also published as: CN112503922A

Abstract

The invention discloses a bidirectional overload adjusting device of a drying machine, which is used for pre-judging the overload of grains before the grains enter a drying section, so that the uneven drying caused by the overload is avoided, and the damage to machinery caused by the overload is reduced. The device is installed in the material conveying bin, the material conveying bin is arranged at the bottom of the material storage bin and is separated by a bin door, the bin door is connected with a mandrel in a rotating mode in the adjusting device, acting force exerted by the weight of grains on the mandrel in the material storage bin provides power for the rotation of the mandrel, the rotating range and the rotating direction are set in advance, the mandrel serves as a main rotating point to drive the support to rotate, the support is pulled by the spring to transmit rotary motion to the mandrel rod, and then the rotary motion is transmitted to the output rod to be in contact with a control switch on the stop block to achieve opening of the bin door and operation of the conveying motor, the device controls the spring in advance before exceeding a critical value, damage to the spring is avoided while overload is adjusted, and the service life of the bidirectional overload adjusting device is prolonged.

Description

Bidirectional overload adjusting device of drying machine

Technical Field

The invention belongs to the field of machine manufacturing, and particularly relates to a bidirectional overload adjusting device of a drying machine.

Background

The dryer is a mechanical device for reducing moisture of materials by using heat energy, and is used for drying objects. The dryer vaporizes the moisture in the material by heating to obtain a solid material of a specified moisture content, the purpose of drying being for the material to be used or further processed. The grain drier is mainly used for drying rice and wheat, can also be used for pre-drying crops such as rape seeds after being slightly improved, and consists of main parts such as a coal furnace, a motor, an axial flow fan, a stacking rack and the like.

When the grain drier works, the motor drives the impeller of the axial flow fan to rotate at a high speed, hot air generated by combustion of a coal stove is sucked into the fan through the upper part of the air partition plate, and forms mixed gas with cold air sucked into the fan from the lower part of the air partition plate, the mixed gas enters the stacking rack through the air-shielding pipe and then diffuses, when the mixed gas permeates grain layers on the stacking rack, the temperature of the grains is properly increased while a large amount of water vapor is taken away, so that the grains are gradually dried, the temperature of the mixed gas can be adjusted through different opening angles of the temperature adjusting cover and the temperature adjusting plate, and in order to dry the grains uniformly, the rice is often turned by using a spade.

The work load of the grain drier is large, too much feeding or uneven feeding enters the drying box to cause a large overload dangerous situation, which causes bad drying effect and even damage to the motor. For these reasons, the prior art generally adopts a toggle plate breaking method and a flywheel torque limiting protection. The breaking method of the toggle plate presets the breaking point of the toggle plate with low strength and easy breaking, when the crusher is overloaded, the stress sensitive area of the toggle plate is automatically broken due to the sudden rise of the stress to the limit value, the power transmission is cut off, the machine damage is prevented, but the breaking point can not be accurately and quantitatively controlled because the mechanical property fluctuation of the toggle plate is large and limited by the calculation precision, the overload can not be protected sometimes, and even if the crusher is overloaded, the crusher is protected, and the equipment can not run before the cleaning, the dismounting and the replacing because the crusher is in the accident state, the production is delayed due to the interruption of the flow. The moment limiting protection of the flywheel adopts a spring friction clutch, a hydraulic friction clutch or a safety pin and the like. The simple swing type jaw crusher is applied more. The flywheel torque-limiting protection friction clutch not only ensures the transmission of normal working torque, but also ensures that the transmitted torque does not exceed an allowable value. When the crushing cavity falls into the material barrier, the machine is overloaded to reach critical torque, and the flywheel freely slides on the shaft to play a role in protecting main parts. However, the friction factor of the clutch is greatly influenced by external conditions (such as temperature and the like), so that the working reliability of the clutch is limited, and the clutch still needs manual obstacle clearing and shutdown repair during overload, so that the system recovery is troublesome. Therefore, the need for regulation before overload is fundamentally resolved.

Disclosure of Invention

Aiming at the problems, the invention provides a bidirectional overload adjusting device of a drying machine, which is characterized in that an overload device is arranged on a feeding part, so that the overload prejudgment is carried out on grains before the grains are fed, and the problems of uneven drying caused by overload after the grains enter a drying section, damage caused by overload operation of an instrument and the like are avoided.

A bidirectional overload adjusting device of a dryer is arranged on a feeding part; the feeding component comprises a storage bin, a bin door and a conveying bin, and the bidirectional adjusting device mainly comprises a spindle rod, a support, a spindle, a first spring, a second spring, a control switch, an output rod, a first stop block and a second stop block.

The bin gate is divided into a shaft fixing area, a feeding area and a support frame, the shaft fixing area and the conveying bin are connected by the support frame, the shaft fixing area is located in the middle of the bin gate, and the feeding area is an area on the bin gate except the shaft fixing area and the support frame.

The mandrel is rotatably connected with the bottom of the bin gate through a steel bar positioning shaft, the steel bar positioning shaft is arranged on a steel bar positioning clamp, the steel bar positioning clamp is fixed in the middle of the mandrel, the upper end portion and the lower end portion of the mandrel are respectively sleeved with an upper positioning clamp and a lower positioning clamp, and a transverse fixing support is arranged on the upper positioning clamp.

The upper positioning clamp consists of an upper mandrel fixing plate and a lower bracket fixing plate, wherein a vertical channel is formed in the vertical direction of the mandrel fixing plate and the bracket fixing plate, and a transverse channel is formed in the non-contact part of the bracket fixing plate and the mandrel. The automatic feeding device is characterized in that the mandrel rod is arranged below the support and fixedly connected with the middle of the transmission pin, the upper end portion and the lower end portion of the transmission pin are respectively connected with one ends of a first spring and a second spring, the other ends of the first spring and the second spring are respectively fixed on an upper fixing plate and a lower fixing plate, the upper fixing plate is installed on the lower surface of a cross rod of the support, the lower fixing plate is installed on the upper surface of the cross rod of the output rod, a first stop block and a second stop block are respectively arranged on two sides of the output rod, and a control switch is installed at the contact positions of the first stop block and the second stop block and the output rod.

Furthermore, the support comprises mutually perpendicular's horizontal pole and montant, is the type of falling L, the fixed plate is fixed the output pole comprises mutually perpendicular's horizontal pole and montant, is the L type.

Furthermore, the upper positioning clamp consists of a lower mandrel fixing plate and an upper bracket fixing plate, vertical pipelines are arranged on the mandrel fixing plate and the bracket fixing plate, and a transverse pipeline is arranged on the bracket fixing plate.

Further, the axle fixed area is a convex surface, and the middle part is a little higher than the edge part, axle fixed area lower surface is removing the mandrel and is being set up the electromagnetic shaker outside the combination position of reinforcing bar location axle, storage silo bottom installation inductor, the electromagnetic shaker passes through signal connection with the inductor, and when the inductor received the signal that no cereal lasts the whereabouts, the electromagnetic shaker opened, will remain cereal vibrations on the axle fixed area and come down, when the mandrel bears pressure and is in unloaded time range, the electromagnetic shaker stopped vibrations.

Further, the mandrel rod is located behind the mandrel and extends transversely without being in contact with the mandrel, and the length of the mandrel rod is longer than that of the cross rod of the support and is not in contact with the vertical rod of the support.

Furthermore, a third spring may be further disposed between the transmission pin and the upper fixing plate or the lower fixing plate, one end of the third spring is fixed to the lower fixing plate, the other end of the third spring is fixed to the transmission pin, the connection position is diagonal to the first spring and the second spring 11, and similarly, one end of the third spring may be fixed to the upper fixing plate, and the other end of the third spring is fixed to the transmission pin.

Furthermore, the steel bar positioning clamp can be arranged on the mandrel in a plurality, and the steel bar positioning shaft can also be provided with a plurality of steel bar positioning shafts as long as the mandrel can be rotationally connected with the bottom of the bin door.

Further, the weight in the storage bin exerts an acting force on one end of the spindle, the rotating direction and the rotating angle of the spindle are set according to the acting force, the maximum stroke of the bidirectional overload device in the counterclockwise direction is the stroke of the output rod from the initial position to the first stop block when the output rod touches the first stop block, and the maximum stroke of the bidirectional overload device in the clockwise direction is the stroke from the first stop block to the second stop block.

The invention has the beneficial effects that:

1. according to the invention, the bidirectional overload adjusting device is arranged on the feeding part, so that the grains are pre-judged whether to be overloaded or not before entering the drying section, the grains entering the drying section can achieve a better drying effect each time, the problems of uneven grain drying instrument damage and the like caused by overload and the waste of resources caused by no-load are avoided;

2. the acting force exerted on the mandrel by the weight in the material conveying bin is used as a direct power source for the rotation of the mandrel, so that the whole bidirectional overload device is simpler; the automatic door and the conveying motor are controlled in a unified way through the control switch, so that the conveying motor is started by the automatic door to stop conveying when the conveying bin is about to overload, the overload is avoided, and the conveying motor is closed by the automatic door to start conveying when acting force on the upper end of the spindle is lower than a preset value;

3. the control switch is set to control the spring in advance before the spring exceeds the critical value, so that the damage of the spring is avoided while the overload is regulated, and the service life of the bidirectional overload regulating device is prolonged.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The invention is described in further detail below with reference to the figures and specific embodiments.

FIG. 1: a schematic structural diagram of a bidirectional overload adjusting device of a dryer;

FIG. 2: an enlarged schematic view of portion a of fig. 1;

FIG. 3: left view of upper locator card 5;

FIG. 4: a top view of the upper locator card 5;

FIG. 5: a top view of the door.

In the figure: 1. a spindle rod; 2. a support; 3. an upper fixing plate; 4. a first spring; 5. an upper positioning card; 6. a control switch; 7. a first stopper; 8. a second stopper; 9. a mandrel; 10. a drive pin; 11. a second spring; 12. a lower fixing plate; 13. an output rod; 14. a steel bar positioning clamp; 15. a lower positioning card; 16. A third spring; 17. a reinforcing steel bar positioning shaft; 18. a storage bin; 19. a material conveying bin; 20. a shaft fixing region; 21. A feed zone; 22. a support frame; 51. a bracket fixing plate; 52. and (4) fixing the mandrel.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 5, a bidirectional overload adjusting apparatus of a dryer is provided on a feeding part. The feeding component comprises a storage bin 18, a conveying bin 19 and a bin gate, the bin gate is an automatic gate and separates the storage bin 18 from the conveying bin 19, the storage bin 18 is arranged above the bin gate, and the conveying bin 19 is arranged below the bin gate. The bin gate is divided into a shaft fixing area 20, a feeding area 21 and a support frame 22, the support frame 22 connects the shaft fixing area 20 with the material conveying bin 19, the shaft fixing area 20 is located in the middle of the bin gate, and the feeding area 21 is an area on the bin gate except the shaft fixing area 20 and the support frame 22.

The bottom of the shaft fixing area 20 is in contact with the upper surface of the mandrel 9, the mandrel 9 is rotatably connected with the bottom of the shaft fixing area 20 through a steel bar positioning shaft 17, the steel bar positioning shaft 17 is arranged on a steel bar positioning clamp 14, and the steel bar positioning shafts 17 are arranged in a plurality and are arranged in the same direction as the mandrel 9.

The bidirectional overload adjusting device comprises a mandrel 9, wherein the mandrel 9 is a cylindrical rod body, an upper positioning clamp 5 is arranged at the upper end of the mandrel 9, a lower positioning clamp 15 is arranged at the lower end of the mandrel 9, two steel bar positioning clamps 14 are arranged in the middle of the mandrel 9, the upper positioning clamp 5 is used for installing the mandrel 9 and the support 2, the lower positioning clamp 15 is used for fixing the mandrel 9, the steel bar positioning clamps 14 are used for determining the installation position of the mandrel 9, and a rotatable installation part of a steel bar positioning shaft 17 is arranged on each steel bar positioning clamp 14.

The upper positioning clamp 5 is composed of a mandrel fixing plate 52 and a support fixing plate 51, the mandrel fixing plate 52 is fixed below the support fixing plate 51, a vertical channel is formed in the vertical direction of the mandrel fixing plate 52 and the support fixing plate 51 and used for fixing the mandrel 9, the mandrel 9 penetrates from the vertical channel formed in the lower positioning clamp 15 to the upper portion of the support fixing plate 51 through the mandrel fixing plate 52, a transverse channel is formed in the position where the support fixing plate 51 is not in contact with the mandrel 9, and the support 2 and the mandrel 9 are jointly fixed on the upper positioning clamp 5 through the transverse channel.

The support 2 is composed of two cross rods and a vertical rod which are perpendicular to each other and is of an inverted L shape. An upper fixing plate 3 is arranged on the lower surface of the cross rod of the support 2, and the upper fixing plate 3 is used for fixing a first spring 4. One end of the first spring 4 is fixed on the upper fixing plate 3, and the other end is fixedly connected with the upper end of the transmission pin 10. The lower end of the driving pin 10 is connected with one end of a second spring 11, the other end of the second spring 11 is fixedly connected with a lower fixing plate 12, and the lower fixing plate 12 is fixed on the upper surface of an output rod 13. The output rod 13 is composed of a cross rod and a vertical rod which are perpendicular to each other and is L-shaped. The connecting part of the lower fixing plate 12 and the output rod 13 is positioned on a cross bar of the output rod 13, the upper fixing plate 3 and the lower fixing plate 12 are symmetrically arranged around the mandrel rod 1, and the mandrel rod 1 is fixedly connected with the middle part of the transmission pin 10.

A third spring 16 may be further disposed between the driving pin 10 and the upper fixing plate 3 or the lower fixing plate 12, one end of the third spring 16 is fixed to the lower fixing plate 12, the other end of the third spring is fixed to the driving pin 10, a connection point is diagonally arranged with the first spring 4 and the second spring 11, similarly, one end of the third spring may be fixed to the upper fixing plate 3, and the other end of the third spring is fixed to the driving pin 10, a mounting position of the third spring 16 is not limited thereto, as long as sufficient torque force can be exerted, a maximum torque of the first spring 4 is a distance from the initial position of the output rod 13 to the control switch 6 on the first stopper 7, and a maximum torque of the second spring 11 is a distance from the output rod 13 to the control switch 6 on the second stopper 8.

The mandrel rod 1 is located behind the mandrel 9, the transverse extending length of the mandrel rod 1 is longer than that of the cross rod of the support 2, the support 2 rotates, the mandrel rod 1 is in vertical rod contact with the support 2 and moves under the driving of a vertical rod, the vertical rod part of the output rod 13 is not in contact with the mandrel rod 1, and the mandrel rod 1 is in contact with the vertical rod part of the output rod 13 when rotating, so that the output rod 13 rotates. The output rod 13 is provided with a first stop 7 and a second stop 8 respectively.

Control switch 6 is all installed with output rod 13's contact site to first dog 7 and second dog 8, control switch 6 is used for controlling conveyor motor's operation, conveyor motor installs in the outside bottom of pay-off part for drive auger shaft and lifting machine work, first dog 7 and second dog 8 are fixed on the inner wall of defeated feed bin 19, and output rod 13's rotation maximum range just can with the control switch 6 contact of installation on first dog 7 and the second dog 8.

The conveying motor and the automatic door are controlled by a control switch 6 and are also controlled by an external motor switch, the automatic door is also provided with an independent switch, the starting and the final closing of the conveying motor are controlled by the external motor switch, and the control switch 6 is used for controlling the motor running during overload and idle load in the conveying process.

The lower surface of the shaft fixing area 20 is provided with a vibrator outside the joint part of the mandrel 9 and the reinforcing steel bar positioning shaft 17, the bottom of the storage bin 18 is provided with a sensor, the vibrator is in signal connection with the sensor, when the sensor receives a signal that no grain continuously falls, the vibrator is started to vibrate the residual grain on the shaft fixing area 20, and when the mandrel 9 bears pressure and is in a no-load range, the vibrator stops vibrating.

The working mode and principle of the invention are as follows:

the device applies an acting force to one end of the spindle 9 through the shaft fixing area 20 according to the weight in the storage bin 18, and is arranged to realize the rotating direction and angle of the spindle 9 according to the acting force, and the rotating angle is matched with the torque of the spring. The preset overload value is lower than the actual overload value of the drying section, and the preset no-load value is 0-5 kg; when the preset overload value is reached, the spindle 9 rotates anticlockwise, and the rotation stroke is just the stroke of the output rod 13 from the initial position to the control switch 6 on the first stop dog 7; the actual idle load value is 0-5kg, the spindle 9 rotates clockwise by the distance from the first stop 7 to the second stop 8 to the shaft fixing area 20, and this setting is only taken as an example, and the setting range is not fixed and can be set according to specific situations.

Door is in closed state during initial condition, and when the effort that mandrel 9 bore accorded with the default, reinforcing bar location axle 17 begins to rotate, and mandrel 9 rotates under reinforcing bar location axle 17's drive, and on support 2 transmitted rotary motion to mandrel pole 1, on the output lever 13 of retransmission again, support 2 and output lever 13 all were passed through first spring 4 by mandrel pole 1, and second spring 11 pulls.

When the acting force borne by the mandrel 9 reaches a preset overload value, the mandrel 9 rotates anticlockwise, the support 2 rotates anticlockwise, the transmission pin 10 starts to move along with the first spring 4, the mandrel rod 1 rotates along with the mandrel rod and contacts with the output rod 13, the output rod 13 contacts with the control switch 6 on the first stop dog 7, the conveying motor stops working, the feeding area 21 of the bin door is opened, grains enter the drying section from the feeding area 21, and at the moment, the first spring 4 is in a tensioning state. When the grain completely enters the drying section, the weight born by the mandrel 9 is lower than a set value, the mandrel 9 starts to rotate clockwise, the first half belongs to the reset process of the first spring 4, the second half starts to rotate under the traction of the second spring 11, the output rod 13 touches the control switch 6 on the second stop block 8, the conveying motor is opened, the storage bin 18 bin door is closed, the upper auger starts to convey, the reciprocating is carried out, when the required dried grain is lower than a preset overload value and is larger than a no-load value, automatic conveying and conveying can not be realized, and the operation can be carried out through an external motor switch and a switch of an automatic door.

Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The bidirectional overload adjusting device of the drying machine is characterized in that the bidirectional overload adjusting device is arranged on a feeding part;

the feeding component comprises a storage bin (18), a bin door and a conveying bin (19), and the bidirectional adjusting device mainly comprises a spindle rod (1), a support (2), a spindle (9), a first spring (4), a second spring (11), a third spring (16), a control switch (6), an output rod (13), a first stop block (7) and a second stop block (8); the bin door comprises a shaft fixing area (20), a feeding area (21) and a support frame (22), the shaft fixing area (20) is located in the middle of the bin door, the support frame (22) is connected with the shaft fixing area (20) and the conveying bin (19), and the feeding area (21) is an area on the bin door except the shaft fixing area (20) and the support frame (22); the lower part of the support (2) is provided with the mandrel rod (1), the mandrel rod (1) is fixedly connected with the middle of a transmission pin (10), the upper end part and the lower end part of the transmission pin (10) are respectively connected with one ends of a first spring (4) and a second spring (11), the other ends of the first spring (4) and the second spring (11) are respectively fixed on an upper fixing plate (3) and a lower fixing plate (12), the upper fixing plate (3) is installed on the lower surface of a cross rod of the support (2), the lower fixing plate (12) is installed on the upper surface of the cross rod of an output rod (13), two sides of the output rod (13) are respectively provided with a first stop block (7) and a second stop block (8), and a third spring (16) can be arranged between the transmission pin (10) and the upper fixing plate (3) or the lower fixing plate (12).

2. The bidirectional overload adjusting device of the drying machine as claimed in claim 1, wherein the mandrel (9) is rotatably connected to the bottom of the door through a steel bar positioning shaft (17), the steel bar positioning shaft (17) is disposed on a steel bar positioning clip (14), the steel bar positioning clip (14) is fixed to the middle of the mandrel (9), the upper end and the lower end of the mandrel (9) are respectively sleeved with the upper positioning clip (5) and the lower positioning clip (15), and the upper positioning clip (5) is transversely fixed to the bracket (2).

3. The bidirectional overload adjusting apparatus of a dryer according to claim 2, wherein the upper positioning clip (5) is composed of an upper spindle fixing plate (52) and a lower bracket fixing plate (51), a vertical channel is formed in the vertical direction of the spindle fixing plate (52) and the bracket fixing plate (51), and a transverse channel is formed in a non-contact part of the bracket fixing plate (51) and the spindle (9).

4. The bidirectional overload adjusting apparatus of a dryer according to claim 1, wherein the support (2) is formed of a cross bar and a vertical bar perpendicular to each other in an inverted L shape, and the output bar (13) is formed of a cross bar and a vertical bar perpendicular to each other in an L shape.

5. The bidirectional overload adjusting apparatus for a dryer according to claim 2, wherein the upper locator card (5) is composed of a lower mandrel fixing plate (52) and an upper bracket fixing plate (51), the mandrel fixing plate (52) and the bracket fixing plate (51) are provided with vertical pipes, and the bracket fixing plate (51) is provided with a transverse pipe.

6. A bi-directional overload adjusting apparatus for a dryer according to claim 1, wherein the spindle rod (1) is located behind the spindle (9) and extends laterally without contacting the spindle (9), the length of the spindle rod (1) is longer than the length of the cross bar of the support (2) and is capable of contacting the vertical bar of the support (2) when rotating, and the spindle rod (1) is capable of contacting the vertical bar of the output rod (13) when rotating.

7. A bi-directional overload adjusting apparatus for a dryer according to claim 1, wherein the control switch (6) is installed at the contact position of the first stopper (7) and the second stopper (8) with the output rod (13).

8. The bidirectional overload adjusting device of a dryer according to claim 1, wherein the weight in the storage bin (18) applies a force to one end of the spindle (9), the rotation direction and the angle of the spindle (9) are set according to the force, the maximum stroke of the bidirectional overload device in the counterclockwise direction is the stroke of the output rod (13) from the starting position to the control switch (6) touching the first stop (7), and the maximum stroke of the bidirectional overload device in the clockwise direction is the stroke from the first stop (7) to the second stop (8).