Positive and negative rotation control adjusting device of spiral discharging machine

Abstract

The utility model relates to the technical field of spiral discharging machines, in particular to a positive and negative rotation control adjusting device of a spiral discharging machine, which comprises a charging barrel, a feeding pipe and a discharging pipe are respectively and fixedly arranged at the feeding end and the discharging end of the charging barrel, an end cover is detachably arranged at the feeding end part of the charging barrel, and a spiral blade is arranged in the charging barrel. A transmission shaft penetrating out of the end cover and rotationally connected with the end cover is fixedly installed at the center of the spiral blade, a driven gear is detachably installed on a shaft body of the end, penetrating out of the end cover, of the transmission shaft, a double-speed three-phase asynchronous motor is arranged on one side of the driven gear, and a driving gear is detachably installed on an output shaft of the double-speed three-phase asynchronous motor. The driving gear is meshed with the driven gear; one side of the double-speed three-phase asynchronous motor is provided with a control adjusting device used for controlling the double-speed three-phase asynchronous motor to rotate forwards and backwards. According to the utility model, the dismounting and maintenance operation is convenient, and the stable transmission is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of screw feeder technology, and more specifically, to a screw feeder forward and reverse rotation control and adjustment device. Background Technology

[0002] In the production of nitrohumic acid, the screw feeder is an important material conveying equipment. It conveys and discharges nitrohumic acid by rotating the screw blades. The motor is coaxially mounted at the end of the screw blades. The motor on this type of screw feeder can generally be controlled by a controller, which can control the motor to rotate forward, reverse, and adjust the speed.

[0003] Patent CN119517691A discloses a multi-contact motor forward and reverse rotation control device. Its structure includes a rotatable moving contact, an elastic telescopic rod, a sliding push rod, and an electromagnetic assembly. The electromagnetic assembly serves as the driving force, enabling rapid switching of the moving contact position to control the motor's forward and reverse rotation. The moving contact is designed to sequentially connect with the fixed contact; the sliding push rod cooperates with a reciprocating push block on the back of the moving contact to achieve rapid and smooth movement of the moving contact. The device features a miniaturized design, a compact structure, and saves space, facilitating installation and integration into various electrical control systems. Furthermore, the scraping action of the moving contact during the connection process automatically cleans the fixed contact, effectively preventing contact welding and enhancing system safety. Maintenance costs are low, the device is easy to disassemble and maintain, and it ensures safe disconnection even in the event of return spring failure, making it suitable for a wide range of industrial automation applications.

[0004] While this technical solution has its advantages, most screw feeders that can control the forward and reverse rotation of the motor via control devices still have some shortcomings in use. For example, the screw blades are generally directly fixed to the motor via a drive shaft. This direct fixed connection cannot guarantee efficient and stable power transmission to the drive shaft of the screw blades. In addition, the direct fixed connection also makes subsequent disassembly and maintenance inconvenient. In view of this, we propose a forward and reverse rotation control and adjustment device for screw feeders. Utility Model Content

[0005] The purpose of this invention is to provide a forward and reverse rotation control and adjustment device for a screw feeder, so as to solve the defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A forward and reverse rotation control and adjustment device for a screw feeder includes a feed cylinder. A feed pipe and a discharge pipe are fixedly installed at the feed end and discharge end of the feed cylinder, respectively. An end cover is detachably installed at the feed end of the feed cylinder. A screw blade is disposed inside the feed cylinder. A transmission shaft, passing through the end cover and rotatably connected to it, is fixedly installed at the center of the screw blade. A driven gear is detachably installed on the shaft body at the end of the transmission shaft passing through the end cover. A dual-speed three-phase asynchronous motor is disposed on one side of the driven gear. A driving gear is detachably installed on the output shaft of the dual-speed three-phase asynchronous motor. The driving gear and the driven gear mesh with each other. A control and adjustment device for controlling the forward and reverse rotation of the dual-speed three-phase asynchronous motor is disposed on one side of the dual-speed three-phase asynchronous motor.

[0008] Preferably, a discharge valve is fixedly installed at the end of the discharge pipe, and an external discharge pipe is connected to the discharge end flange of the discharge valve.

[0009] Preferably, a fixing ring is fixedly installed at the feed end of the material cylinder, and the end cover and the fixing ring are detachably connected by multiple fastening bolts.

[0010] Preferably, a sealing ring is provided between the fixing ring and the end cap, and the end cap presses the sealing ring against the front side of the fixing ring.

[0011] Preferably, a mechanical seal is fixedly installed at the center of the outer side of the end cover, and the drive shaft passes through the mechanical seal and is rotatably connected to the mechanical seal.

[0012] The above two settings can ensure a sealing effect and reduce leakage.

[0013] Preferably, both the driving gear and the driven gear are fixedly mounted with a fixing sleeve, and the fixing sleeve is detachably connected to the corresponding shaft by fastening bolts.

[0014] This feature facilitates the installation and removal of the driving and driven gears.

[0015] Preferably, the control and adjustment device includes a controller and a control panel, wherein the control panel is provided with a speed adjustment knob and forward / reverse control buttons.

[0016] Preferably, the controller is externally mounted with a controller housing, the bottom wall of the controller housing is provided with wiring holes, the side of the controller housing is provided with multiple heat dissipation holes, a fixing frame is fixedly mounted on the front shell of the controller housing, and a control panel housing is fixedly mounted externally to the control panel, the fixing frame being detachably mounted on the rear side of the control panel housing.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model replaces the traditional direct fixed connection method with a transmission structure in which the driving gear and driven gear mesh with each other. This achieves efficient and stable transmission of motor power to the transmission shaft of the spiral blades, ensuring stable operation of the spiral feeder and improving feeding efficiency. Simultaneously, the driving gear, driven gear, and shaft are detachably connected via a fixing sleeve and fastening bolts, facilitating subsequent disassembly, inspection, and replacement of the gears, thus reducing the difficulty of equipment maintenance.

[0019] 2. This utility model utilizes the detachable connection between the end cap and the fixing ring via fastening bolts, and sets a sealing ring between the two. In addition, a mechanical seal is installed on the outer side of the end cap and rotatedly connected to the drive shaft, which achieves a good seal for the feed end of the material cylinder, thereby reducing leakage, ensuring the safety of the production environment, avoiding material waste, and effectively improving the safety and reliability of the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0022] Figure 3 This is a partial structural schematic diagram of the present invention;

[0023] Figure 4 This is a schematic diagram of the control and adjustment device of this utility model;

[0024] Figure 5 This is an exploded structural diagram of the control and adjustment device of this utility model;

[0025] The meanings of the labels in the diagram are as follows:

[0026] 1. Material cylinder; 10. Feed pipe; 11. Discharge pipe; 12. Unloading valve; 13. External discharge pipe; 14. Retaining ring; 15. Sealing ring; 16. End cap; 161. Mechanical seal;

[0027] 2. Helical blades; 20. Drive shaft; 21. Dual-speed three-phase asynchronous motor; 22. Driven gear; 23. Driven gear; 24. Fixed sleeve;

[0028] 3. Control and adjustment device; 30. Controller; 31. Controller housing; 32. Wiring hole; 33. Fixing frame; 34. Heat dissipation hole; 35. Control panel; 36. Control panel housing; 37. Speed ​​adjustment knob; 38. Forward and reverse control button. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-5 This utility model provides a technical solution: a forward and reverse rotation control and adjustment device for a screw feeder, including a material cylinder 1. The feed end and the discharge end of the material cylinder 1 are respectively fixedly installed with a feed pipe 10 and a discharge pipe 11, so that nitrohumic acid can smoothly enter the material cylinder 1 and be discharged through the discharge pipe 11, forming a complete material conveying channel.

[0031] The feed end of the material cylinder 1 is detachably equipped with an end cover 16, and a fixing ring 14 is fixedly installed at the feed end of the material cylinder 1. The end cover 16 and the fixing ring 14 are detachably connected by multiple fastening bolts, which facilitates the inspection and maintenance of components such as the spiral blade 2 inside the material cylinder 1 after the end cover 16 is removed. When it is necessary to inspect or clean the inside of the material cylinder 1, the end cover 16 can be quickly removed. At the same time, this connection method also ensures the stability of the end cover 16 after installation.

[0032] like Figure 2 and Figure 3 As shown, a spiral blade 2 is provided inside the material cylinder 1. A transmission shaft 20 is fixedly installed at the center of the spiral blade 2, extending through the end cover 16 and rotatably connected to the end cover 16. A driven gear 22 is detachably installed on the end shaft of the transmission shaft 20 extending through the end cover 16. A dual-speed three-phase asynchronous motor 21 is provided on one side of the driven gear 22. A drive gear 23 is detachably installed on the output shaft of the dual-speed three-phase asynchronous motor 21. The drive gear 23 and the driven gear 22 mesh with each other, so that the motor power is stably transmitted to the spiral blade 2, driving it to rotate for material feeding.

[0033] like Figure 1 As shown, a discharge valve 12 is fixedly installed at the end of the discharge pipe 11. The discharge end flange of the discharge valve 12 is connected to an external discharge pipe 13, which can flexibly control the discharge volume and discharge speed of nitrohumic acid. In conjunction with the external discharge pipe 13 connected to the discharge end flange of the discharge valve 12, it is convenient to transport nitrohumic acid to subsequent processing equipment or storage devices, thereby improving the controllability of the discharge operation and the convenience of transportation.

[0034] like Figure 2As shown, a sealing ring 15 is provided between the fixing ring 14 and the end cover 16, and the end cover 16 presses the sealing ring 15 tightly on the front side of the fixing ring 14; a mechanical seal 161 is fixedly installed at the center of the outer side of the end cover 16, and the drive shaft 20 passes through the mechanical seal 161 and is rotatably connected to the mechanical seal 161, which can ensure the sealing effect, effectively reduce the risk of leakage, ensure the safety of the production environment and prevent material waste.

[0035] like Figure 2 and Figure 3 As shown, both the driving gear 23 and the driven gear 22 are fixedly mounted with a fixing sleeve 24. The fixing sleeve 24 is detachably connected to the corresponding shaft by fastening bolts. The fixing sleeve 24 of the driving gear 23 is mounted on the output shaft of the dual-speed three-phase asynchronous motor 21, and the fixing sleeve 24 of the driven gear 22 is mounted on the transmission shaft 20. During installation, the gear position can be precisely adjusted to ensure meshing accuracy. If the gears wear or malfunction during equipment operation, the fastening bolts on the fixing sleeve 24 can be quickly removed to disassemble the driving gear 23 and the driven gear 22 for repair or replacement, reducing the difficulty and time cost of equipment maintenance.

[0036] It is worth noting that a control and adjustment device 3 for controlling the forward and reverse rotation of the dual-speed three-phase asynchronous motor 21 is provided on one side. The control and adjustment device 3 includes a controller 30 and a control panel 35. The control panel 35 is equipped with a speed adjustment knob 37 and a forward and reverse control button 38. The operator can operate directly on the control panel 35, flexibly adjust the speed of the dual-speed three-phase asynchronous motor 21 through the speed adjustment knob 37, thereby controlling the feeding speed of the spiral blade 2, and realize the forward and reverse rotation of the motor by using the forward and reverse control button 38 to meet different feeding needs. The operation is simple and convenient.

[0037] It is worth noting that the controller 30 is externally mounted with a controller housing 31, and the bottom wall of the controller housing 31 is provided with wiring holes 32 to facilitate the layout and connection of electrical lines; the controller housing 31 is provided with multiple heat dissipation holes 34 on its side to dissipate the heat generated by the controller 30 during operation and ensure the stable operation of the controller 30; a fixing frame 33 is fixedly mounted on the front shell of the controller housing 31, and a control panel housing 36 is fixedly mounted on the outside of the control panel 35. The fixing frame 33 is detachably mounted on the rear side of the control panel housing 36, which facilitates the assembly, disassembly and maintenance of the controller 30 and the control panel 35, making equipment maintenance more convenient and efficient.

[0038] It is worth noting that when the operator presses the forward / reverse control button on the control panel 35, the button generates a corresponding electrical signal. This signal is transmitted to the controller 30, where a pre-set program analyzes the signal. Based on the forward / reverse command, the controller changes the phase sequence of the three-phase power supply to the dual-speed three-phase asynchronous motor 21 to achieve forward or reverse rotation, thereby driving the screw shaft to rotate in the desired direction. For speed control, the operator rotates the speed adjustment knob on the control panel 35, which converts the speed adjustment signal into an electrical signal and transmits it to the controller 30. After receiving the signal, the controller 30 outputs voltage or current signals of different magnitudes to the dual-speed three-phase asynchronous motor 21 according to a pre-set algorithm and corresponding relationship. Since the dual-speed three-phase asynchronous motor 21 has both high-speed and low-speed operating states, the signal output by the controller 30 can precisely adjust the motor speed in different states, thereby controlling the feeding speed of the screw feeder.

[0039] Finally, it should be noted that the dual-speed three-phase asynchronous motor 21, controller 30, control panel 35, and internal control system involved in this utility model are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and the adapted controller and power supply, are connected by wires. The specific connection method should refer to the working principle of this utility model. The electrical connections between each electrical component are completed in the order of operation. The detailed connection methods are all technologies known in the art.

[0040] When using the forward and reverse rotation control adjustment device of the spiral feeder of this utility model, firstly, nitrohumic acid enters the material cylinder 1 through the feed pipe 10. The spiral blades 2 are driven by the dual-speed three-phase asynchronous motor 21, and drive the transmission shaft 20 to rotate through the meshing of the active gear 23 and the driven gear 22, so as to realize the conveying of nitrohumic acid in the material cylinder 1. The operator sets the motor direction through the forward and reverse rotation control button 38 on the control panel 35 and adjusts the speed using the speed adjustment knob 37 to adapt to different feeding requirements. During the feeding process, the discharge valve 12 can adjust the opening as needed to control the flow rate and speed of nitrohumic acid discharged through the discharge pipe 11 and the external discharge pipe 13.

[0041] If maintenance is required, the fastening bolts between the retaining ring 14 and the end cover 16 can be unscrewed, and the end cover 16 can be disassembled for internal maintenance. For problems such as gear wear, the bolts on the retaining sleeve 24 can be loosened to quickly replace the driving gear 23 and the driven gear 22. The controller 30 and the control panel 35 can also be maintained by disassembling the connection between the retaining frame 33 and the control panel housing 36. The entire usage process is efficient and convenient.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A forward and reverse rotation control and adjustment device for a screw feeder, comprising a feed cylinder (1), characterized in that: The feed end and discharge end of the feed cylinder (1) are respectively fixedly installed with feed pipe (10) and discharge pipe (11). The feed end of the feed cylinder (1) is detachably installed with end cover (16). The feed cylinder (1) is provided with spiral blade (2). The center of the spiral blade (2) is fixedly installed with a transmission shaft (20) that passes through the end cover (16) and is rotatably connected to the end cover (16). The end shaft of the transmission shaft (20) that passes through the end cover (16) is detachably installed with a driven gear (22). A dual-speed three-phase asynchronous motor (21) is provided on one side of the driven gear (22). A driving gear (23) is detachably installed on the output shaft of the dual-speed three-phase asynchronous motor (21). The driving gear (23) meshes with the driven gear (22). A control adjustment device (3) for controlling the forward and reverse rotation of the dual-speed three-phase asynchronous motor (21) is provided on one side of the dual-speed three-phase asynchronous motor (21).

2. The screw feeder forward and reverse rotation control and adjustment device according to claim 1, characterized in that: The discharge pipe (11) is fixedly installed with a discharge valve (12), and the discharge end flange of the discharge valve (12) is connected to an external discharge pipe (13).

3. The forward and reverse rotation control and adjustment device for the screw feeder according to claim 1, characterized in that: A fixing ring (14) is fixedly installed at the feed end of the material cylinder (1), and the end cover (16) and the fixing ring (14) are detachably connected by multiple fastening bolts.

4. The screw feeder forward and reverse rotation control and adjustment device according to claim 3, characterized in that: A sealing ring (15) is provided between the fixing ring (14) and the end cap (16), and the end cap (16) presses the sealing ring (15) against the front side of the fixing ring (14).

5. The screw feeder forward and reverse rotation control and adjustment device according to claim 1, characterized in that: A mechanical seal (161) is fixedly installed at the center of the outer side of the end cap (16), and the drive shaft (20) passes through the mechanical seal (161) and is rotatably connected to the mechanical seal (161).

6. The forward and reverse rotation control and adjustment device for the screw feeder according to claim 1, characterized in that: Both the driving gear (23) and the driven gear (22) are fixedly mounted with a fixing sleeve (24), and the fixing sleeve (24) is detachably connected to the corresponding shaft by a fastening bolt.

7. The forward and reverse rotation control and adjustment device for the screw feeder according to claim 1, characterized in that: The control and adjustment device (3) includes a controller (30) and a control panel (35), on which a speed adjustment knob (37) and a forward and reverse control button (38) are provided.

8. The screw feeder forward and reverse rotation control and adjustment device according to claim 7, characterized in that: The controller (30) is externally mounted with a controller housing (31), the bottom wall of the controller housing (31) is provided with wiring holes (32), the side of the controller housing (31) is provided with multiple heat dissipation holes (34), the front shell of the controller housing (31) is fixedly mounted with a fixing frame (33), the control panel (35) is externally fixedly mounted with a control panel housing (36), and the fixing frame (33) is detachably mounted on the rear side of the control panel housing (36).

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