Dry quenching tractor speed curve controller

Abstract

The utility model provides a speed curve controller for a coke dry quenching tractor, which comprises a shell, a transmission shaft, a magnetic encoder and a circuit board, the transmission shaft and the magnetic encoder are in transmission connection and can rotate synchronously, and the magnetic encoder is electrically connected with the circuit board; the circuit board comprises a CPU circuit and two sets of setting circuits, the CPU circuit is electrically connected with the two sets of setting circuits respectively, the two sets of setting circuits are used for node parameters of the forward stroke and the backward stroke of the tractor respectively, any set of setting circuit comprises a selection switch and a setting switch, the setting circuit comprises a plurality of nodes, the selection switch is used for selecting the nodes, and the setting switch is used for setting the nodes. The setting switch comprises a degree pulse coding switch. According to the utility model, the magnetic encoder and the tractor drum shaft are connected and rotate synchronously through the transmission shaft, and the rotation angle of the drum can be measured through the encoder; two groups of detection nodes are set through two groups of setting circuits and serve as key nodes of a speed control curve of the tractor; and through low-cost components and sensors, the manufacturing cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of dry coke quenching, and in particular to a speed curve controller of a dry coke quenching tractor. Background Art

[0002] In the steel smelting industry, a large amount of coke is needed for iron ore smelting, and iron ore needs to be transported by a dry quenching coke elevator. A tractor is also needed to work with the dry quenching coke elevator. Coke is refined by coke ovens. After refining, coke cans are used as containers to transport it to the hoisting station of the elevator. The elevator then transports the coke cans to the dry quenching oven to quench and cool the coke. A tractor is needed to transport the coke cans from the coke oven to the hoisting station of the dry quenching coke elevator.

[0003] The existing Chinese patent with publication number CN203397245U discloses an automatic positioning and speed measurement control system for a CDQ transverse traction trolley, which is characterized in that it includes a PLC controller, a traction trolley winch frequency converter, a laser ranging sensor and a rotary encoder. The PLC controller is respectively connected to the traction trolley winch frequency converter, the laser ranging sensor and the rotary encoder, the traction trolley winch frequency converter is connected to the winch motor, and the PLC controller also communicates data with the CDQ control station; the laser ranging sensor is arranged on a fixed object at one end of the transverse traction trolley and is located on a horizontal line with the ranging reference point on the transverse traction trolley, and the rotary encoder is arranged on the tail end of the shaft of the winch motor.

[0004] Because the tractor is transporting high-temperature coke, which is heavy and hot, the hazard will be very great if a rollover accident occurs. Therefore, there are special requirements for the running speed curve of the tractor, that is, it must run according to a specific running curve to ensure that the coke tank is stable and does not roll over, and to ensure the safety of the tractor. The tractor has a fixed working route. It is necessary to transport the fully loaded coke tank to the hoisting station of the elevator, and it is also necessary to transport the empty coke tank at the hoisting station of the elevator to the coke oven position. Therefore, the tractor has two operating processes, that is, two speed curves are required. At present, a precision cam controller imported from abroad is used to collect the key positions of the tractor's running route to control the speed curve of the tractor. The cam limit has multiple cam pieces, which are divided into two groups corresponding to the two running speed curve controls of the tractor, and each cam piece has an independent scale, accurate to 0.1 degrees, which can ensure accurate cam piece position adjustment.

[0005] Although this cam switch is reliable and accurate and can ensure the safe operation of the tractor, it is also very expensive and accounts for a large proportion of the cost of the entire tractor system.

[0006] Therefore, the inventor believes that it is necessary to provide a dry quenching tractor speed curve controller to replace the imported cam limiter, thereby solving the problem that the cam limiter used in the current tractor speed curve control is too expensive, which will greatly reduce the equipment cost of the tractor. Utility Model Content

[0007] In view of the defects in the prior art, the utility model aims to provide a speed curve controller for a dry coke quenching tractor.

[0008] According to the utility model, a speed curve controller of a dry coke quenching tractor is provided, comprising: a housing, a transmission shaft, a magnetic encoder and a circuit board, wherein the transmission shaft is in transmission connection with the magnetic encoder and the two can rotate synchronously, and the magnetic encoder is electrically connected with the circuit board;

[0009] The circuit board includes a CPU circuit and two groups of setting circuits. The CPU circuit is electrically connected to the two groups of setting circuits respectively. The two groups of setting circuits are respectively used for the node parameters of the forward and reverse strokes of the tractor. Any group of setting circuits includes a selection switch and a setting switch. The setting circuit includes multiple nodes. The selection switch is used to select nodes. The setting switch includes a degree pulse coding switch.

[0010] Preferably, a display circuit is provided on the circuit board, and the display circuit includes two groups of digital tubes. The two groups of digital tubes are respectively provided with digital tube drivers, and any of the digital tube drivers is electrically connected to the CPU circuit.

[0011] Preferably, the setting circuit includes 1 working point and 15 travel nodes, and the setting switch includes two output pins, one common pin and two switch pins.

[0012] Preferably, an encoder communication circuit is provided on the circuit board, and the encoder communication circuit includes a MAX485 circuit and a magnetic encoder interface, the MAX485 circuit is electrically connected to the magnetic encoder interface, and the magnetic encoder interface is electrically connected to the magnetic encoder.

[0013] Preferably, an Ethernet communication circuit is provided on the circuit board, and the Ethernet communication circuit includes a PU-UART, a CH390, a network transformer, and an Ethernet interface connected in sequence, the Ethernet interface is connected to an external Ethernet communication cable, and the PU-UART is connected to the CPU circuit.

[0014] Preferably, a power supply circuit is provided on the circuit board, and the power supply circuit is electrically connected to the CPU circuit.

[0015] Preferably, a cover plate is provided on the shell, the shell is sealedly connected to the cover plate and a cavity is formed inside the shell, a partition is provided inside the shell, and the partition, the magnetic encoder and the circuit board are sequentially arranged in the cavity;

[0016] A shaft sleeve is arranged in the middle of the front panel of the shell, a bearing is embedded in the shaft sleeve, and the transmission shaft passes through the bearing and the partition in sequence from the outside of the shell to be connected with the magnetic encoder.

[0017] Preferably, a plurality of first mounting columns and a plurality of second mounting columns are arranged inside the shell, the first mounting columns are located on the front side of the partition, the second mounting columns are located on the rear side of the partition and are arranged below the circuit board, and the sum of the height of the second mounting columns and the thickness of the circuit board is equal to the height of the first mounting columns.

[0018] Preferably, the front side of the housing is fastened to the cover plate via the first mounting post, and the rear side of the housing is fastened to the circuit board and the cover plate via the second mounting post;

[0019] The cover plate is correspondingly provided with a cover plate mounting column, there is a gap between the cover plate mounting column and the first mounting column, there is a gap between the cover plate mounting column and the upper plane of the circuit board, and a rubber gasket is provided at the gap.

[0020] Preferably, the outer edge of the cover plate is embedded in the outer edge of the shell, and the two are connected by concave-convex matching, and there is a gap between the convex surface of the cover plate and the concave surface of the shell, and a sealing rubber pad is arranged in the gap;

[0021] The bottom of the shell is provided with shell mounting plates along both sides of the long sides respectively, and the shell mounting plates are provided with shell mounting holes.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The utility model connects the magnetic encoder with the drum shaft of the tractor through a transmission shaft to realize synchronous rotation, and can measure the rotation angle of the drum through the encoder; two groups of detection nodes are set through two groups of setting circuits, which serve as key nodes of the speed control curve of the tractor; through low-cost components and sensors, the overall manufacturing cost of the tractor can be effectively reduced, the spare parts cost can be reduced, and the detection accuracy can be effectively improved, which can ensure that the speed curve transition of the tractor is smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0025] Figure 1 This is a schematic diagram of the internal structure of the speed curve controller of the dry coke quenching tractor mainly embodied in the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the circuit board mainly embodied in the utility model;

[0027] Figure 3 The utility model mainly embodies the circuit diagram of the circuit board;

[0028] Figure 4 This is a schematic diagram of the cover side of the speed curve controller of the dry coke quenching tractor vehicle mainly embodied in the utility model;

[0029] Figure 5 This is a schematic diagram of the installation of the housing and the cover plate of the utility model;

[0030] Figure 6 This is a schematic diagram of the installation of the housing and the cover plate of the utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the cover plate installation column mainly embodied in the utility model;

[0032] Figure 8 This is a partial installation diagram of the main shell and cover plate of the utility model;

[0033] Fig. 9 This is a partial installation diagram of the main shell and cover plate of the utility model;

[0034] Fig.10 The utility model mainly embodies the circuit diagram of the circuit setting.

[0035] Reference numerals:

[0036] Housing 1 Transmission shaft 2 Magnetic encoder 3

[0037] Circuit board 4 Cover plate 5 Communication cable stuffing box 6

[0038] Power cable gland 7 Partition plate 11 First mounting column 12

[0039] Second mounting column 13 Shell mounting plate 14 Shell mounting hole 15

[0040] Bearing 21 CPU circuit 41 Setting circuit 42

[0041] Select switch 421 Set switch 422 Display circuit 43

[0042] Digital tube 431 Digital tube driver 432 Encoder communication circuit 44

[0043] MAX485 circuit 441 Magnetic encoder interface 442 Ethernet communication circuit 45

[0044] PU-UART 451 CH390452 Network transformer 453

[0045] Ethernet interface 454 Power circuit 46 Power interface 461

[0046] Cover plate mounting column 51 DETAILED DESCRIPTION

[0047] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model. These all belong to the protection scope of the utility model.

[0048] like Figure 1-3 As shown, a speed curve controller of a dry coke quenching tractor provided by the utility model includes: a housing 1, a transmission shaft 2, a magnetic encoder 3 and a circuit board 4, the transmission shaft 2 is transmission-connected with the magnetic encoder 3 and the two can rotate synchronously, the magnetic encoder 3 is electrically connected with the circuit board 4; the circuit board 4 includes a CPU circuit 41 and two groups of setting circuits 42, the CPU circuit 41 is electrically connected with the two groups of setting circuits 42 respectively, the two groups of setting circuits 42 are respectively used for the node parameters of the forward stroke and the reverse stroke of the tractor, any group of setting circuits 42 includes a selection switch 421 and a setting switch 422, the setting circuit 42 includes a plurality of nodes, the selection switch 421 is used to select the node, and the setting switch 422 includes a 360-degree pulse coding switch.

[0049] A display circuit 43 is disposed on the circuit board 4 . The display circuit 43 includes two groups of digital tubes 431 . The two groups of digital tubes 431 are respectively provided with digital tube drivers 432 . Any digital tube driver 432 is electrically connected to the CPU circuit 41 .

[0050] The setting circuit 42 includes 1 working point and 15 travel nodes, and the setting switch 422 includes two output pins, one common pin and two switch pins.

[0051] An encoder communication circuit 44 is provided on the circuit board 4 . The encoder communication circuit 44 includes a MAX485 circuit 441 and a magnetic encoder interface 442 . The MAX485 circuit 441 is electrically connected to the magnetic encoder interface 442 , and the magnetic encoder interface 442 is electrically connected to the magnetic encoder 3 .

[0052] An Ethernet communication circuit 45 is provided on the circuit board 4. The Ethernet communication circuit 45 includes a PU-UART451, a CH390452, a network transformer 453, and an Ethernet interface 454 which are connected in sequence. The Ethernet interface 454 is connected to an external Ethernet communication cable. The PU-UART451 is connected to the CPU circuit 41.

[0053] A power circuit 46 is provided on the circuit board 4 , and the power circuit 46 is electrically connected to the CPU circuit 41 .

[0054] like Figure 4-9 As shown, all structures of the present application are installed inside a closed metal shell.

[0055] The housing 1 is provided with a cover plate 5, which is sealed and connected to the cover plate 5 and has a cavity formed inside. The housing 1 is provided with a partition plate 11 inside, and the partition plate 11, the magnetic encoder 3, and the circuit board 4 are sequentially arranged in the cavity; a shaft sleeve is provided in the middle of the front panel of the housing 1, and a bearing 21 is embedded inside the shaft sleeve. The transmission shaft 2 passes through the bearing 21 and the partition plate 11 from the outside of the housing 1 and is connected to the magnetic encoder 3. The partition plate 11 is integrally formed with the housing 1 and has a thickness of about 5 mm, which can ensure the stability of the installation of the magnetic encoder 3 and the stability of the transmission shaft 2.

[0056] A shaft sleeve is processed in the center of the front panel of the shell 1, and a bearing 21 is embedded inside the shaft sleeve and fits tightly. The transmission shaft 2 passes through the bearing 21 and fits tightly with it, then extends to the internal partition 11 and extends out of the partition by 7.1 mm. Since the transmission shaft 2 is short and does not pass through the entire shell 1, but is only transmitted at the front end of the shell 1, resulting in poor stability and balance. Therefore, it is necessary to process the bearing 21 embedded in the shaft sleeve on the front panel of the shell 1 to enhance the stability of the transmission shaft 2. The connection between the transmission shaft 2 and the partition 11 is a tight sliding connection to ensure that the transmission shaft 2 can rotate freely in the transmission hole of the partition 11, but will not radially jump, further ensuring the stability of the transmission shaft 2. A keyway is processed at the front end of the transmission shaft 2. The keyway and the key can be matched to conveniently and reliably connect the transmission shaft 2 to the upstream equipment (the center axis of the machine wire rope drum) without slipping and causing measurement errors.

[0057] The central rotating magnet of the magnetic encoder 3 is installed at the end of the transmission shaft 2 and fits closely with it. At this time, the rotation of the transmission shaft 2 will drive the central rotating magnet of the magnetic encoder 3 to rotate synchronously, so that the magnetic encoder 3 can accurately measure the rotation angle of the reel. The external structure of the magnetic encoder 3 has two mounting holes, and the internal partition 11 of the housing 1 is processed with two M3 threaded mounting holes. The magnetic encoder 3 is installed on the partition 11 through these two mounting holes, which can ensure the concentricity of the magnetic encoder 3 with the transmission shaft 2 after installation.

[0058] A plurality of first mounting columns 12 and a plurality of second mounting columns 13 are arranged inside the housing 1. The first mounting columns 12 are located at the front side of the partition 11, and the second mounting columns 13 are located at the rear side of the partition 11 and arranged below the circuit board 4. The sum of the height of the second mounting columns 13 and the thickness of the circuit board 4 is equal to the height of the first mounting columns 12. Preferably, six mounting columns are processed inside the housing 1, of which two first mounting columns 12 are located between the partition 11 and the front panel and are used to fix the cover plate 5, and the other four second mounting columns 13 are located between the partition 11 and the rear panel, that is, they are used to fix the circuit board 4 and the cover plate 5, and the height of these four second mounting columns 13 is 2 mm less than the height of the first mounting columns 12, because the thickness of the circuit board 4 is 2 mm. When the circuit board 4 is installed, it can be ensured that the height of the upper plane of the circuit board 4 is consistent with the height of the first mounting columns 12.

[0059] The front side of the housing 1 is fastened to the cover plate 5 through the first mounting post 12, and the rear side of the housing 1 is fastened to the circuit board 4 and the cover plate 5 through the second mounting post 13; the cover plate 5 is correspondingly provided with a cover plate mounting post 51, there is a gap between the cover plate mounting post 51 and the first mounting post 12, there is a gap between the cover plate mounting post 51 and the plane on the circuit board 4, and a rubber gasket is provided at the gap. Preferably, the cover plate 5 is processed with a cover plate mounting post 51, an M3 screw hole is processed in the center of the cover plate mounting post 51, a screw countersunk hole is processed near the outside of the housing in the center of the housing mounting post, and a mounting hole with a diameter of 3.2 mm is processed near the inside, so that the screw can be fastened by sinking.

[0060] The outer edge of the cover plate 5 is embedded in the outer edge of the housing 1, and the two are connected by concave-convex fitting. There is a gap between the convex surface of the cover plate 5 and the concave surface of the housing 1, and a sealing rubber pad is arranged in the gap; the bottom of the housing 1 is respectively provided with housing mounting plates 14 on both sides along the long sides, and the housing mounting plates 14 are provided with housing mounting holes 15. When the cover plate 5 is installed on the housing 1, the gap between the cover plate mounting column 51 and the first mounting column 12 and the gap with the upper plane of the circuit board 4 are about 1 mm. By adding a rubber gasket, this gap can be filled, and it can be ensured that when the housing 1 and the cover plate 5 are fastened, the mounting hole and the inside of 1 are in a sealed state, which can ensure both the reliable fastening of the cover plate 5 and the sealing of the housing 1. The joint between the shell 1 and the cover 5 is matched with the concave and convex parts, so that the cover 5 can be accurately embedded and installed on the shell 1. At the same time, there is a gap of about 1 mm between the convex surface of the cover 5 and the concave surface of the shell 1. A sealing rubber pad needs to be placed here before the cover 5 and the shell 1 are installed. When the shell 1 and the cover 5 are tightened, the cover 5 and the inside of the shell 1 can be in a sealed state.

[0061] The bottom of the housing 1 is processed with housing mounting plates 14 on both sides along the long sides, and two housing mounting holes 15 are processed on each side of the housing mounting plate 14. The housing mounting plate 14 is about 2 mm thick, and the housing mounting hole 15 is about 8 mm in diameter. The housing mounting hole 15 can be used to install and fix the utility model as a whole.

[0062] The electrical part of the present application is mainly composed of a display circuit 43, a setting circuit 42, an encoder communication circuit 44, an Ethernet communication circuit 45, and a CPU circuit 41. The display circuit 43, the setting circuit 42, the encoder communication circuit 44, and the Ethernet communication circuit 45 all need to be connected to the CPU circuit 41, which completes information parsing and resource allocation.

[0063] The power circuit 46 is responsible for supplying power to other circuits, mainly including converting the external 24VDC power supply into the voltage level required by each circuit to ensure that each circuit can work stably and reliably. The power circuit 46 is provided with a power interface 461 .

[0064] The main component of the display circuit 43 is a digital tube 431. The utility model includes two groups of digital tubes: digital tube 1 and digital tube 2, which respectively display the displacement, setting parameters and other information of the two reciprocating process strokes of the tractor. Digital tube 431 requires a digital tube driver 432 driving chip for display driving, so the display circuit 43 of the utility model also includes digital tube driver 1 and digital tube driver 2. Digital tube driver 1 is connected to digital tube 1, and is used to drive digital tube 1 to display information. Digital tube driver 2 is connected to digital tube 2, and is used to drive digital tube 2 to display information. Digital tube driver 1 and digital tube driver 2 are also connected to CPU circuit 41 to receive display data information from CPU circuit 41.

[0065] The setting circuit 42 includes a selection switch 421 and a setting switch 422. The present application includes two groups of setting circuits: setting circuit 1 and setting circuit 2, wherein setting circuit 1 includes selection switch 1 and setting switch 1, and setting circuit 2 includes selection switch 2 and setting switch 2. Selection switch 1, setting switch 1, selection switch 2, and setting switch 2 are all directly connected to the CPU circuit 41, and the action analysis and subsequent processing of the selection switch 421 and the setting switch 422 are completed through the CPU circuit 41.

[0066] Setting circuit 1 and setting circuit 2 are used to set the node parameters of the forward and reverse travel of the tractor respectively. The selection switch is responsible for selecting the node selection. This application selects the 8421 coded hexadecimal coded switch, which has 16 selection points, of which point 0 is the working point. After selecting this point, the utility model is in a working state, otherwise it is in a setting state. In addition, each point from 1 to 15 represents a travel node. Usually, each tractor travel requires 6 nodes to meet the demand. The utility model sets 15 nodes to fully meet the on-site needs. The setting switch is a 360-degree pulse coding switch, including two output pins, A phase and B phase, a common pin and two switch pins. The setting switch will emit an orthogonal pulse with a phase difference of 90 degrees each time it is rotated. Phase A leads when rotating forward, and phase B leads when rotating reversely. According to this characteristic, count-up or count-down can be performed. When the handle of the setting switch is pressed, a switch quantity signal will also be triggered, which is output by two switch pins.

[0067] More specifically, Fig.10 The circuit diagram of the setting circuit 42 is shown in FIG. The setting circuit 42 includes three parts, namely, setting circuit 1, setting circuit 2, and setting circuit interface. The setting circuit interface is a description of the connection network port between setting circuit 1 and setting circuit 2 and the CPU circuit. The CPU of the present application adopts the domestic GD32F103RBT6 model CPU, in which PB0 to PB13 are connected to the setting circuit. Setting circuit 1 includes a selection switch SW1 and a setting switch S1. Setting circuit 2 includes a selection switch SW2 and a setting switch S2. SW1 and SW2 are 8421 coded hexadecimal coding switches with 16 selection points, 4 data pins and 1 common pin. The 4 data pins are 8, 4, 2, and 1, respectively, which are combined into 4-bit binary data and can represent decimal data 0 to 15. The common pin code is C and is connected to GND. A 10kΩ 4-bit resistor is connected to VCC for the 4 data pins and pulled up to a high level. SW1 is connected to PR1 and SW2 is connected to PR2. When the selection switch is rotated, the data of the data pin will change according to the selected gear. SW3 and SW4 are setting switches. The setting switch is a 360-degree pulse coding switch, including two data output pins for phase A and phase B, codenamed A and B, and a common pin, codenamed C. Two switch pins, codenamed D and E. Common pin C is connected to GND, and data pins A and B will be connected to VCC through a 10kΩ 4-bit resistor, pulled up to a high level, SW3 is connected to PR3, and SW4 is connected to PR4. Each rotation of the setting switch will send out an orthogonal pulse with a phase difference of 90 degrees. Phase A leads when rotating forward, and phase B leads when rotating reversely. Based on this feature, count-up or count-down can be performed. When the handle of the setting switch is pressed, a switch signal will also be triggered, and the two switch pins D and E will close or disconnect the output.

[0068] The basic setup process for this application is as follows:

[0069] First, rotate the selection switch to select the node to be set. The forward stroke is set by setting circuit 1, and the reverse stroke is set by setting circuit 2. After selecting the target node, the corresponding digital tube displays the displacement data of the currently set node. Pressing the setting switch once will enter a setting menu. There are two groups in the setting menu, represented by A1 and A2 respectively. A1 represents the node action type setting, and A2 represents the node displacement setting. Then select the menu by rotating the setting switch. After selecting the menu, press the setting switch handle to enter the menu parameter setting.

[0070] Entering the A1 menu is the node action type setting, and the node types include b1, b2, and b3. b1 represents the normally open type, that is, when the current displacement is less than the node displacement, the node state is 0. b2 represents the normally closed type, that is, when the current displacement is less than the node displacement, the node state is 1. b3 represents the interval type. This type of node requires two different node displacements to be set. When the current displacement is within the set node displacement interval, the node state is 1, otherwise it is 0. Select the node type by rotating the setting switch. After selecting, press the setting switch handle to save the node type and return to the previous menu.

[0071] Entering the A2 menu is the node displacement setting. If the current node type is b1 or b2, the current node displacement will be displayed. The displacement data can be increased or decreased by rotating the setting switch. When the expected data is set, press the setting switch handle to save the parameters and return to the previous menu. If the current node type is b3, two sets of node displacements need to be set. The two sets of node displacements cannot be the same, otherwise they cannot be saved. The two sets of node displacements are not distinguished by front and back, and they will be automatically sorted. After setting the first set of parameters and saving them, the second set of parameters will be displayed. Similarly, after setting and saving the second set of parameters, you will return to the previous menu.

[0072] At this time, switch the selection switch to set the next group of nodes. Repeat the above setting actions to complete the setting. When all nodes are set, select the selection switch to 0 to make this application run according to the newly set parameters.

[0073] The magnetic encoder communication circuit 44 includes a MAX485 circuit 441 and a magnetic encoder interface 442. The MAX485 circuit 441 is connected to the magnetic encoder interface 442, and the magnetic encoder interface 442 is connected to the magnetic encoder 3. The MAX485 circuit 441 is responsible for receiving and sending the data of the magnetic encoder in RS485 communication mode, decoding and converting it into a UART signal that can be received by the CPU circuit 41, and then connecting it to the CPU circuit 41.

[0074] The Ethernet communication circuit 45 includes PU-UART 451, CH390452, network transformer 453, and Ethernet interface 454. The utility model only provides one Ethernet interface 454, which can effectively simplify the circuit, reduce costs, and improve the stability and reliability of the circuit. The connection sequence is that PU-UART 451 connects to CH390452, CH390452 connects to network transformer 453, network transformer 453 connects to Ethernet interface 454, and Ethernet interface 454 connects to an external Ethernet communication cable. PU-UART451 is also connected to CPU circuit 41 to realize the interaction of external Ethernet data with CPU circuit 41 of the utility model.

[0075] The PU-UART circuit is mainly composed of the PU-UART chip. The PN-UART is a Profinet to serial port transparent transmission and frame synchronization communication chip. The maximum exchange cycle is 1ms. The PN chip maps the I and Q area memory data inside the PLC to the input and output data of the serial port. The MCU needs to send data frames to the PN chip every exchange cycle. If the PN chip does not receive MCU data for 3 consecutive frames, it will report the device shutdown to the PLC.

[0076] The PU-UART circuit needs to be used with an Ethernet controller circuit. The utility model uses an Ethernet controller circuit with the CH390 chip as the core. The CH390 is an industrial-grade Ethernet controller chip with a built-in 10 / 100M Ethernet media transport layer (MAC) and physical layer transceiver (PHY). It supports CAT3, 4, 5 of 10BASE-T and CAT5, 6 of 100BASE-TX, supports HP Auto-MDIX, low-power design, and complies with the IEEE 802.3u specification. The CH390 has a built-in 16K-byte SRAM, supports 3.3V or 2.5V parallel interface (CH390L) and SPI serial interface (CH390H), and is compatible with various MCU, MPU, DSP and other controllers.

[0077] The Ethernet controller cannot be directly connected to the network cable through the Ethernet interface 454, and needs to use the network transformer 453 as an intermediate medium to perform signal conversion before it can be connected to the network interface.

[0078] This application requires two cables, an Ethernet communication cable and a power cable. The Ethernet communication cable needs to be Figure 1 The communication cable stuffing box 6 is connected to the inside of the housing 1, and the power cable needs to be connected to the inside of the housing through the power cable stuffing box 7. The communication cable stuffing box 6 and the power cable stuffing box 7 can effectively ensure that the housing and the outside can achieve a sealing effect, ensuring that the protection level of the utility model meets the requirements.

[0079] The key technology of tractor speed curve control is to accurately and reliably collect the position of the tractor's running route. As the name implies, the tractor works by wire rope traction. The traction wire rope is rotated and wound on two wire rope drums, similar to the working principle of a winch. The two drums are driven by an electric motor to rotate and pull the tractor to run. Therefore, collecting the rotation position of the drum can collect the specific position of the tractor, and the cam limiter is coaxially installed on the drum and rotates synchronously with the drum to collect the running position of the tractor.

[0080] The present application also adopts the coaxial installation with the reel to collect the running position of the reel, thereby realizing the position collection of the tractor.

[0081] At present, the sensors that can collect the position of rotating equipment are mainly cam limit and rotary encoder. Cam limit usually has low collection accuracy and few nodes, while rotary encoder has high collection accuracy, and theoretically the number of nodes can be equivalent to the collection accuracy of encoder. Encoders used to measure displacement basically use absolute encoders, and the current absolute encoder can collect thousands or even tens of thousands of pulses per turn, which can accurately detect displacement to millimeters. Therefore, this application will use absolute encoder as displacement collection equipment. For this application, the drum will rotate multiple times in one process cycle of the tractor, so a multi-turn encoder is needed to ensure the collection accuracy. The absolute encoders on the market are currently divided into photoelectric encoders and magnetic encoders. The photoelectric encoder has higher accuracy, so the structure is more precise and has weaker adaptability to harsh environments. The accuracy of the magnetic encoder is slightly lower, but it has stronger adaptability to harsh environments. This application is applied to dry quenching tractors, which have a relatively harsh environment, so a magnetic encoder is used as a detection device. However, the communication method of the magnetic encoder currently still basically adopts RS485 communication method. Although this communication method is more common, it has weak anti-interference ability and is mainly used for short-distance detection of precision equipment such as machine tools. At present, the mainstream communication method basically adopts Ethernet communication, which is convenient, fast, easy to construct, and has strong anti-interference ability. Therefore, this application needs to add a set of interface circuits to decode the encoder data and convert it into Ethernet communication mode to communicate with upstream equipment.

[0082] Figure 3 The magnetic encoder communication circuit shown will realize the basic functions of the interface circuit. The interface of the magnetic encoder used in this application is the RS485 interface, that is, the data interaction of the magnetic encoder needs to be realized through the RS485 interface circuit. This application will use the MAX485 chip as the core to realize the communication interface with the magnetic encoder. The MAX485 converts the RS485 signal into a UART signal, and then connects to the UART1 port of the CPU to realize the CPU to read and set the data of the magnetic encoder, and at the same time decode the data and convert the displacement of the magnetic encoder, so as to calculate the actual distance of the device.

[0083] The present application connects the magnetic encoder to the tractor drum shaft through a transmission shaft, rotates synchronously, measures the rotation angle of the drum through the encoder, and then communicates data with the magnetic encoder through the CPU to convert the running displacement of the tractor. Based on this displacement, two groups of detection nodes are set as key nodes of the speed control curve of the tractor to realize the cam node function of the cam limit. Then, the node displacement is set through two groups of digital tubes and setting switches, and then communicates with the upstream device through Ethernet communication, and the current node state of the tractor is fed back to the upstream control device, thereby realizing the speed curve control of the tractor.

[0084] This application realizes the displacement detection function of the tractor through a simple detection method and displacement conversion, and then makes multiple sets of electronic nodes to simulate the cam node state. Since the entire structure uses domestic components and sensors, the cost is effectively reduced, and the imported cam limiter is effectively replaced, which can effectively reduce the overall manufacturing cost of the tractor, reduce the cost of spare parts, and effectively improve the detection accuracy, which can ensure that the speed curve transition of the tractor is smoother. At the same time, it can also meet the intelligent and automated needs of the dry quenching elevator.

[0085] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0086] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A speed curve controller for a dry coke quenching tractor, characterized in that: include: A housing (1), a transmission shaft (2), a magnetic encoder (3) and a circuit board (4), wherein the transmission shaft (2) is in transmission connection with the magnetic encoder (3) and the two can rotate synchronously, and the magnetic encoder (3) is electrically connected with the circuit board (4); The circuit board (4) comprises a CPU circuit (41) and two groups of setting circuits (42). The CPU circuit (41) is electrically connected to the two groups of setting circuits (42) respectively. The two groups of setting circuits (42) are respectively used for node parameters of the forward and reverse strokes of the tractor. Any group of setting circuits (42) comprises a selection switch (421) and a setting switch (422). The setting circuit (42) comprises a plurality of nodes. The selection switch (421) is used for selecting a node. The setting switch (422) comprises a 360-degree pulse coding switch.

2. The speed curve controller of the dry coke quenching tractor according to claim 1, characterized in that: The circuit board (4) is provided with a display circuit (43), the display circuit (43) comprising two groups of digital tubes (431), the two groups of digital tubes (431) are respectively provided with digital tube drivers (432), and any of the digital tube drivers (432) is electrically connected to the CPU circuit (41).

3. The speed curve controller of the dry coke quenching tractor according to claim 1, characterized in that: The setting circuit (42) includes one working point and 15 travel nodes, and the setting switch (422) includes two output pins, one common pin and two switch pins.

4. The speed curve controller of the dry coke quenching tractor according to claim 1, characterized in that: An encoder communication circuit (44) is provided on the circuit board (4), and the encoder communication circuit (44) comprises a MAX485 circuit (441) and a magnetic encoder interface (442). The MAX485 circuit (441) is electrically connected to the magnetic encoder interface (442), and the magnetic encoder interface (442) is electrically connected to the magnetic encoder (3).

5. The speed curve controller of the dry coke quenching tractor according to claim 1, characterized in that: The circuit board (4) is provided with an Ethernet communication circuit (45), and the Ethernet communication circuit (45) comprises a PU-UART (451), a CH390 (452), a network transformer (453), and an Ethernet interface (454) which are connected in sequence, and the Ethernet interface (454) is connected to an external Ethernet communication cable, and the PU-UART (451) is connected to the CPU circuit (41).

6. The speed curve controller of the dry coke quenching tractor according to claim 1, characterized in that: The circuit board (4) is provided with a power circuit (46), and the power circuit (46) is electrically connected to the CPU circuit (41).

7. The speed curve controller of the dry coke quenching tractor according to claim 1, characterized in that: The housing (1) is provided with a cover plate (5), the housing (1) is sealedly connected to the cover plate (5) and a cavity is formed inside the housing (1), a partition plate (11) is provided inside the housing (1), and the partition plate (11), the magnetic encoder (3) and the circuit board (4) are sequentially arranged in the cavity; A shaft sleeve is provided in the middle of the front panel of the housing (1), a bearing (21) is embedded in the shaft sleeve, and the transmission shaft (2) passes through the bearing (21) and the partition (11) in sequence from the outside of the housing (1) to be connected to the magnetic encoder (3).

8. The speed curve controller of the dry coke quenching tractor according to claim 7, characterized in that: A plurality of first mounting columns (12) and a plurality of second mounting columns (13) are arranged inside the shell (1), wherein the first mounting columns (12) are located on the front side of the partition (11), and the second mounting columns (13) are located on the rear side of the partition (11) and are arranged below the circuit board (4), and the sum of the height of the second mounting columns (13) and the thickness of the circuit board (4) is equal to the height of the first mounting columns (12).

9. The speed curve controller of the dry coke quenching tractor vehicle according to claim 8, characterized in that: The front side of the shell (1) is fastened to the cover plate (5) via the first mounting post (12), and the rear side of the shell (1) is fastened to the circuit board (4) and the cover plate (5) via the second mounting post (13); A cover plate mounting column (51) is correspondingly arranged on the cover plate (5), a gap exists between the cover plate mounting column (51) and the first mounting column (12), and a gap exists between the cover plate mounting column (51) and the upper plane of the circuit board (4), and a rubber gasket is arranged at the gap.

10. The speed curve controller of the dry coke quenching tractor vehicle according to claim 7, characterized in that: The outer edge of the cover plate (5) is embedded in the outer edge of the shell (1), and the two are connected by concave-convex matching, and there is a gap between the convex surface of the cover plate (5) and the concave surface of the shell (1), and a sealing rubber pad is provided in the gap; The bottom of the shell (1) is provided with shell mounting plates (14) along both sides of the long sides, and the shell mounting plates (14) are provided with shell mounting holes (15).

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