Water tank type mud scraping system for simulating rectangular concentration tank

Abstract

The utility model discloses a water tank type mud scraping system for simulating a rectangular concentration tank, which comprises a rectangular water tank extending front and back, a mud collecting groove is concavely arranged at the bottom of the water tank close to the front end, and a mud scraping mechanism is arranged in the water tank; the sludge scraping mechanism comprises a truss vehicle erected on the top of the water tank, the truss vehicle comprises a bridge frame and two pairs of walking wheels, the driving ends of the walking wheels are provided with walking motors, the top of the water tank is provided with a pair of guide rails allowing the truss vehicle to move, and the front side and the rear side of the bridge frame are each provided with an in-place switch. Detection blocks corresponding to the in-place switches are arranged at the tops of the two ends of the water tank, the in-place detection output ends of the in-place switches are connected with the in-place detection input end of a central control machine, the walking output end of the central control machine is connected with the walking input end of a walking motor, and a supporting frame extending into the water tank is fixed to the bottom side of the bridge frame. And the bottom end of the supporting frame is hinged with a mud scraping plate which extends leftwards and rightwards. And dead angles can be reduced as much as possible, and scraping is carried out layer by layer from top to bottom.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a water tank type sludge scraping system for simulating a rectangular thickening tank. Background Art

[0002] The concentrator collects the tail water (sludge water from the sedimentation tank and backwash water from the filter tank) from the production process of the water plant, and discharges the supernatant after sedimentation and sludge discharge. It is generally in the shape of vertical flow or radial flow. It can be divided into intermittent operation and continuous operation. In order to better study the discharge process of tail water in the production process of the water plant, it is necessary to simulate it.

[0003] However, the existing scraper equipment is mostly suitable for circular tank structures, and is not suitable for rectangular thickening tanks in water plants. The conventional scraper equipment for square thickening tanks in water plants mainly includes four types: chain circulation type, monorail reciprocating type, hydraulic reciprocating type, and crane-lifting type. The existing crane-lifting type scrapers all adopt the form of rear-drag scrapers. This type of scraper will not be able to scrape the deposited sludge into the existing square thickening tank mud collecting tank of the water plant, and there is a dead angle, which makes the location of the mud collecting tank unsuitable for the existing crane-lifting type scraper. Utility Model Content

[0004] The utility model aims to solve the technical problems existing in the prior art, and particularly innovatively proposes a water tank type sludge scraping system for simulating a rectangular thickening tank, which can reduce dead angles as much as possible and scrape away sludge layer by layer from top to bottom.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a water tank type mud scraping system for simulating a rectangular thickening tank, comprising a rectangular water tank, a mud collecting groove is recessed downward near the front end of the bottom of the water tank, and a mud scraping mechanism is arranged in the water tank; the mud scraping mechanism comprises a gantry vehicle erected on the top of the water tank, the gantry vehicle comprises a bridge frame and two pairs of walking wheels, the driving end of the walking wheel is equipped with a walking motor, a pair of guide rails for the movement of the gantry vehicle are arranged on the top of the water tank, the front and rear sides of the bridge frame are both provided with in-position switches, and detection blocks are arranged at both ends of the guide rails corresponding to the in-position switches, the in-position detection output end of the in-position switch is connected to the in-position detection input end of the central control machine, the walking output end of the central control machine is connected to the walking input end of the walking motor, and a support frame extending into the water tank is fixed to the bottom side of the bridge frame, and the bottom end of the support frame is hinged to the top end of the mud scraping plate extending left and right;

[0006] A lifting ring is provided on the front side of the scraper blade, and an angle adjustment motor, a planetary gear reducer and a winch are provided on the bridge frame. The output end of the angle adjustment motor is connected to the planetary gear reducer, and the output end of the planetary gear reducer is connected to the winch. An angle adjustment rope is provided on the winch, and the other end of the angle adjustment rope is fixed on the lifting ring.

[0007] In the above scheme: a pressure sensor is provided on the scraping surface at the bottom end of the scraper, a scraper is provided on the pressure sensor, the pressure detection output end of the pressure sensor is connected to the pressure detection input end of the central control machine, and the angle adjustment output end of the central control machine is connected to the angle adjustment input end of the angle adjustment motor. The pressure of the scraper can be detected by the pressure sensor to avoid the gantry truck from tipping over after it abuts against larger or harder mud or stones, so that the angle of the scraper can be adjusted according to the pressure to avoid mud or stones.

[0008] In the above scheme: it also includes an electric control box located outside the water tank, the central control machine is installed in the electric control box, and the electric control box is fixedly connected to the legs of the bridge through a mounting seat.

[0009] In the above scheme: the water inlet end of the water tank is connected with the mixing barrel through the water inlet pipe, the feed pipe is provided with an inlet valve and a water inlet pump, the mud collecting tank of the water tank is connected with the transfer circulation barrel through the mud discharge pipe, the mud discharge pipe is provided with a mud discharge valve and a mud discharge pump, the return water end of the transfer circulation barrel is connected with the mixing barrel through the return water pipe, and the return water pipe is provided with a return water valve, which can better simulate the process of collecting and treating tail water in the production process of the water plant.

[0010] In the above scheme: an observation window is provided on the left side wall or the right side wall of the water tank near the bottom at least at the mud collecting groove, so as to facilitate observation of the mud at the bottom of the water tank.

[0011] In the above scheme: the bridge is also provided with a travel switch for limiting the moving range, one end of the travel switch starting point protection limit normally closed switch is connected to the starting point protection limit signal input end of the central control machine, the other end of the travel switch starting point protection limit normally closed switch is connected to the power supply end of the switch power supply, one end of the travel switch end point protection limit normally closed switch is connected to the end point protection limit signal input end of the central control machine, and the other end of the travel switch end point protection limit normally closed switch is connected to the power supply end of the switch power supply;

[0012] The two in-place switches are photoelectric switches, and the detection ends of the two in-place switches are both arranged downward, and the height of the bottom end of the in-place switch is higher than the height of the detection block.

[0013] The travel switch can detect the moving travel of the gantry crane, and can form double protection with the in-position switch to improve the movement safety of the gantry crane.

[0014] In the above scheme: there are two walking motors, namely the first walking motor and the second walking motor, and they are driven by the same frequency converter. The first walking motor is also equipped with a fifth fuse, and the second walking motor is also equipped with a fifth fuse. The data interaction end of the frequency converter is connected to the data interaction end of the central control machine. One end of the normally open contact of the fifth fuse is connected to the power supply end of the switching power supply, and the other end of the normally open contact of the fifth fuse is connected to the fault signal input end of the first walking motor of the central control machine; one end of the normally open contact of the sixth fuse is connected to the power supply end of the switching power supply, and the other end of the normally open contact of the sixth fuse is connected to the fault signal input end of the second walking motor of the central control machine. The first alarm output end of the central control machine is connected to one end of the buzzer, and the other end of the buzzer is connected to the power supply end of the switching power supply; the electric control box is also provided with an audible and visual alarm and an emergency stop button, and the emergency stop signal input end of the central control machine The end is connected to one end of the normally closed contact of the emergency stop button, and the other end of the normally closed contact of the emergency stop button is connected to the power supply end of the switching power supply. The second alarm signal output end of the central control machine is connected to the alarm signal input end of the sound and light alarm; the start indication signal output end of the central control machine is connected to one end of the start indicator light, and the other end of the start indicator light is connected to the power supply end of the switching power supply. The angle adjustment motor is a stepper motor. The step pulse signal output end of the central control machine is connected to the positive electrode of the step pulse signal of the stepper motor, and the negative electrode of the step pulse signal of the stepper motor is connected to the negative electrode of the switching power supply. The step direction signal output end of the central control machine is connected to the positive electrode of the step direction signal input of the stepper motor, and the negative electrode of the step direction signal of the stepper motor is connected to the negative electrode of the switching power supply. The step brake signal output end of the central control machine is connected to the positive electrode of the step brake signal input of the stepper motor, and the negative electrode of the step brake signal of the stepper motor is connected to the negative electrode of the switching power supply.

[0015] The in-position switches are respectively a front in-position switch and a rear in-position switch, one end of the normally open contact of the front in-position switch is connected to the front in-position signal input end of the central control machine, the common end of the front in-position switch is connected to the negative electrode of the switching power supply, and the front in-position switch power supply end is connected to the switching power supply end; one end of the normally open contact of the rear in-position switch is connected to the rear in-position signal input end of the central control machine, the common end of the rear in-position switch is connected to the negative electrode of the switching power supply, and the rear in-position switch power supply end is connected to the switching power supply end.

[0016] In summary, the beneficial effects of the utility model are as follows: the gantry truck can drive the scraper to move back and forth in the water tank to scrape the sludge at the bottom of the water tank into the sludge collecting trough. The angle adjustment motor and planetary gear reducer are used to drive the winch to rotate, so as to adjust the angle of the scraper, which can scrape from top to bottom layer by layer to avoid the gantry truck tipping over due to the scraped sludge being too thick and the resistance being too great. Even in the case of test mud layer accumulation, the gantry truck can be guaranteed to move stably. This technical solution adopts a gantry truck bridge and an improved rake-type scraper, which can automatically adjust the scraper angle. It can meet the actual conditions of different concentration tanks, and routine maintenance does not require the tank to be emptied, and it has high economy and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the utility model.

[0018] Figure 2 It is a schematic diagram of a gantry truck and a fender scraper.

[0019] Figure 3 It is a cross-sectional view of the utility model.

[0020] Figure 4 It is a schematic diagram of the connection between the water tank, the mixing tank, and the transfer circulation tank.

[0021] Figure 5 It is a system diagram of the utility model.

[0022] Figure 6 This is a circuit diagram of the frequency converter, the first travel motor and the second travel motor.

[0023] Figure 7 This is the circuit diagram of the central control machine. DETAILED DESCRIPTION

[0024] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:

[0025] like Figure 1 to Figure 7 As shown, a water tank type mud scraping system for simulating a rectangular thickening tank comprises a rectangular water tank 1 extending forward and backward, and a mud collecting groove 1c is recessed downward near the front end of the bottom of the water tank 1. A mud scraping mechanism is arranged in the water tank 1.

[0026] The water inlet end of the water tank 1 is connected to the mixing barrel 7a through the water inlet pipeline, and the feed pipeline is provided with a water inlet valve and a water inlet pump 7b. The mud discharge end of the water tank 1 is connected to the transfer circulation barrel 8a through the mud discharge pipeline, and the mud discharge pipeline is provided with a mud discharge valve and a mud discharge pump 8b. It can collect and treat the tail water in the production process of the water plant; it can simulate the tail water treatment process in the production process of the water plant.

[0027] During the treatment, the tail water of the water plant is first taken and temporarily stored in the mixing barrel 7a, and the sludge in the mixing barrel 7a is stirred by the submersible mixer to make the sludge in the mixing barrel 7a suspended and uniform in concentration. Then the suspended turbid sewage is sent to the rectangular water tank 1 through the feed pipeline via the water inlet pump 7b, and after static sedimentation and gravity concentration, the mud and water stratification reaches a certain degree. The scraping mechanism is started and the bottom sludge is scraped into the mud collecting tank 1c by the scraping mechanism. When the mud collecting tank 1c reaches a certain amount of mud, the mud pump 8b is used to pump it into the transfer circulation barrel 8a through the drainage system.

[0028] The water return end of the transfer circulation barrel 8a is connected to the mixing barrel 7a through a water return pipe, and a water return valve is arranged on the water return pipe. When the mixing barrel 7a is stirred in the early stage, the water in the transfer circulation barrel 8a can be added to stir together to improve the utilization rate of sewage.

[0029] In order to facilitate observation of the sludge at the bottom of the water tank 1, a row of observation windows 1b is provided on the left side wall or the right side wall of the water tank 1 near the bottom, and the row of observation windows 1b is provided close to one end where the sludge collecting groove 1c is provided.

[0030] The scraping mechanism includes a gantry 2 erected on the top of the water tank 1, and the gantry 2 includes a bridge 2a and two pairs of running wheels. The driving end of the running wheel is equipped with a running motor 6, and a pair of guide rails 1d for the movement of the gantry 2 is provided on the top of the water tank 1. In-position switches are provided on both the front and rear sides of the bridge 2a, and detection blocks 1a are provided at both ends of the guide rails 1d corresponding to the in-position switches. The two in-position switches are photoelectric switches, and the detection ends of the two in-position switches are both set downward, and the height of the bottom end of the in-position switch is higher than the height of the detection block 1a. The in-position detection output end of the in-position switch is connected to the in-position detection input end of the central control machine CPU, and the walking output end of the central control machine CPU is connected to the walking input end of the walking motor 6. It also includes an electric control box 3 located outside the water tank 1, and the central control machine CPU is installed in the electric control box 3, and the electric control box 3 is fixedly connected to the legs of the bridge 2a through a mounting seat. Since the electrical components that the central control machine CPU needs to adjust are all fixed on the bridge 2a, the electric control box 3 is fixed on the bridge 2a for easy wiring.

[0031] A support frame 2b extending into the water tank 1 is fixed to the bottom side of the bridge frame 2a, and a scraper blade 2c extending left and right is hinged at the bottom end of the support frame 2b. A lifting ring 2f is provided on the front side of the scraper blade 2c, and an angle adjustment motor 5, a planetary gear reducer 5a and a winch 4 are provided on the bridge frame 2a. The output end of the angle adjustment motor 5 is connected to the planetary gear reducer 5a, and the output end of the planetary gear reducer 5a is connected to the winch 4. An angle adjustment rope 4a is provided on the winch 4, and the other end of the angle adjustment rope 4a is fixed to the lifting ring 2f.

[0032] A pressure sensor 2d is provided on the scraping surface at the bottom end of the scraper blade 2c, and a scraper blade 2e is provided on the pressure sensor 2d. The pressure detection output end of the pressure sensor 2d is connected to the pressure detection input end of the central control machine CPU, and the angle adjustment output end of the central control machine CPU is connected to the angle adjustment input end of the angle adjustment motor 5. The pressure of the scraper blade 2c can be detected by the pressure sensor 2d to avoid the gantry vehicle 2 from tipping over after it abuts against larger or harder mud blocks and stones, so that the angle of the scraper blade 2c can be adjusted according to the pressure to avoid mud blocks and stones.

[0033] A travel switch for limiting the range of movement is also provided on the bridge 2a, and the model of the travel switch is LX10-11. The travel switch can detect the moving range of the gantry 2, and can form a double protection with the in-place switch to improve the movement safety of the gantry 2. The specific connection method is as follows: one end of the travel switch starting point protection limit normally closed switch SQ4 is connected to the starting point protection limit signal input end of the central control machine CPU, and the other end of the travel switch starting point protection limit normally closed switch SQ4 is connected to the power supply end of the switching power supply U2, one end of the travel switch end point protection limit normally closed switch SQ5 is connected to the end point protection limit signal input end of the central control machine CPU, and the other end of the travel switch end point protection limit normally closed switch SQ5 is connected to the power supply end of the switching power supply U2.

[0034] There are two travel motors 6, which correspond to the travel wheels on both sides. The two travel motors 6 are the first travel motor M1 and the second travel motor M2, and are driven by the same inverter U1. The model of the inverter U1 is VFD4A2MS43ANSAA. The R101 first travel motor M1 is also equipped with a fifth fuse QF5, and the second travel motor M2 is also equipped with a fifth fuse QF6. The specific connection method is as follows: the data interaction end of the inverter U1 is connected to the data interaction end of the central control machine CPU, one end of the normally open contact of the fifth fuse QF5 is connected to the power supply end of the switching power supply U2, and the other end of the normally open contact of the fifth fuse QF5 is connected to the fault signal input end of the first travel motor of the central control machine CPU. The model of the switching power supply U2 is NDR-120-24, and the model of the central control machine CPU is 1215C. One end of the normally open contact of the sixth fuse QF6 is connected to the power supply end of the switching power supply U2, and the other end of the normally open contact of the sixth fuse QF6 is connected to the second travel motor fault signal input end of the central control machine CPU. The first alarm output end of the central control machine CPU is connected to one end of the buzzer HA2, and the other end of the buzzer HA2 is connected to the power supply end of the switching power supply U2. The electric control box 3 is also provided with an audible and visual alarm and an emergency stop button SB3. The emergency stop signal input end of the central control machine CPU is connected to one end of the normally closed contact of the emergency stop button SB3, and the other end of the normally closed contact of the emergency stop button SB3 is connected to the power supply end of the switching power supply U2. The second alarm signal output end of the central control machine CPU is connected to the alarm signal input end of the audible and visual alarm. The second alarm buzzer output end of the central control machine CPU is connected to one end of the three-color buzzer HA2 of the audible and visual alarm, and the other end of the three-color buzzer HA2 is connected to the power supply end of the switching power supply U2. The second alarm red light output end of the central control machine CPU is connected to the red light HL3 end of the sound and light alarm, the second alarm green light output end of the central control machine CPU is connected to the green light HL2 end of the sound and light alarm, the second alarm yellow light output end of the central control machine CPU is connected to the yellow light HL1 end of the sound and light alarm, and the other ends of the red light HL3, green light HL2, and yellow light HL1 are all connected to the power supply end of the switching power supply U2. The start indication signal output end of the central control machine CPU is connected to one end of the start indicator light SB1, and the other end of the start indicator light SB1 is connected to the power supply end of the switching power supply U2. The angle adjustment motor 5 is a stepper motor. The step pulse signal output end of the central control machine CPU is connected to the positive pole of the step pulse signal of the stepper motor, and the negative pole of the step pulse signal of the stepper motor is connected to the negative pole of the switching power supply U2. The step direction signal output end of the central control machine CPU is connected to the positive pole of the step direction signal input of the stepper motor, and the negative pole of the step direction signal of the stepper motor is connected to the negative pole of the switching power supply U2. The step brake signal output end of the central control machine CPU is connected to the positive pole of the step brake signal input of the stepper motor, and the negative pole of the step brake signal of the stepper motor is connected to the negative pole of the switching power supply U2.

[0035] The in-position switches are respectively the front in-position switch SQ1 and the rear in-position switch SQ2. One end of the normally open contact of the front in-position switch SQ1 is connected to the front in-position signal input end of the central control machine CPU, the common end of the front in-position switch SQ1 is connected to the negative pole of the switching power supply U2, and the power end of the front in-position switch SQ1 is connected to the power supply end of the switching power supply U2. One end of the normally open contact of the rear in-position switch SQ2 is connected to the rear in-position signal input end of the central control machine CPU, the common end of the rear in-position switch SQ2 is connected to the negative pole of the switching power supply U2, and the power end of the rear in-position switch SQ2 is connected to the power supply end of the switching power supply U2.

[0036] When the scraper mechanism is working, the inverter U1 drives the first travel motor M1 and the second travel motor M2 to move at the same time. When the front in-position switch SQ1, the rear in-position switch SQ2 or the travel switch detects that the movement is in place, the central control machine CPU sends a signal to adjust the direction of movement to the inverter U1, and drives the first travel motor M1 and the second travel motor M2 to rotate in the opposite direction through the inverter U1 to achieve reciprocating motion.

[0037] A pressure sensor 2d is provided on the scraping surface at the bottom of the scraper blade 2c. When the gantry vehicle 2 moves forward, the force applied to the scraper blade 2c during scraping can be transmitted to the central control machine CPU in real time through the pressure sensor 2d. The central control machine CPU automatically adjusts the rotation speed of the first travel motor M1 and the second travel motor M2 through the inverter U1 according to the force applied to the scraper blade, thereby adjusting the moving speed of the gantry vehicle 2. At the same time, the central control machine CPU also adjusts the stepping reverse and stepping pulse signals of the stepping motor M3 according to the force applied to the scraper blade, thereby adjusting the angle of the scraper blade 2c, and lifting the scraper blade 2c or the lower scraper blade 2c to adjust the depth of the scraped mud.

Claims

1. A water tank type sludge scraping system for simulating a rectangular thickening tank, comprising a rectangular water tank (1), a sludge collecting groove (1c) being provided at the bottom of the water tank (1) and being concave toward the front end, and a sludge scraping mechanism being provided in the water tank (1); characterized in that: The mud scraping mechanism comprises a gantry vehicle (2) mounted on the top of a water tank (1), the gantry vehicle (2) comprising a bridge frame (2a) and two pairs of running wheels, the driving end of the running wheels being equipped with a running motor (6), a pair of guide rails (1d) for the movement of the gantry vehicle (2) being arranged on the top of the water tank (1), in-position switches being arranged on both the front and rear sides of the bridge frame (2a), detection blocks (1a) being arranged at both ends of the guide rails (1d) corresponding to the in-position switches, an in-position detection output end of the in-position switch being connected to an in-position detection input end of a central control unit (CPU), a running output end of the central control unit (CPU) being connected to a running input end of a running motor (6), a support frame (2b) extending into the water tank (1) being fixed on the bottom side of the bridge frame (2a), the bottom end of the support frame (2b) being hinged to the top end of a mud scraping plate (2c) extending to the left and right; A lifting ring (2f) is provided on the front side of the scraper blade (2c); an angle adjustment motor (5), a planetary gear reducer (5a) and a winch (4) are provided on the bridge frame (2a); an output end of the angle adjustment motor (5) is connected to the planetary gear reducer (5a); an output end of the planetary gear reducer (5a) is connected to the winch (4); an angle adjustment rope (4a) is provided on the winch (4); the other end of the angle adjustment rope (4a) is fixed to the lifting ring (2f).

2. A water tank type sludge scraping system for simulating a rectangular thickening tank according to claim 1, characterized in that: A pressure sensor (2d) is provided on the scraping surface at the bottom end of the scraper blade (2c), a scraper blade (2e) is provided on the pressure sensor (2d), a pressure detection output end of the pressure sensor (2d) is connected to a pressure detection input end of a central control machine (CPU), and an angle adjustment output end of the central control machine (CPU) is connected to an angle adjustment input end of an angle adjustment motor (5).

3. A water tank type sludge scraping system for simulating a rectangular thickening tank according to claim 2, characterized in that: It also includes an electric control box (3) located outside the water tank (1), the central control computer (CPU) being installed in the electric control box (3), and the electric control box (3) being fixedly connected to the legs of the bridge frame (2a) via a mounting seat.

4. A water tank type sludge scraping system for simulating a rectangular thickening tank according to claim 1, characterized in that: The water inlet end of the water tank (1) is connected to the mixing barrel (7a) via a water inlet pipeline, and a water inlet valve and a water inlet pump (7b) are provided on the water inlet pipeline. The mud collecting tank of the water tank (1) is connected to the transfer circulation barrel (8a) via a mud discharge pipeline, and a mud discharge valve and a mud discharge pump (8b) are provided on the mud discharge pipeline. The water return end of the transfer circulation barrel (8a) is connected to the mixing barrel (7a) via a water return pipeline, and a water return valve is provided on the water return pipeline.

5. A water tank type sludge scraping system for simulating a rectangular thickening tank according to claim 1, characterized in that: An observation window (1b) is provided on the left side wall or the right side wall of the water tank (1) near the bottom, at least at the mud collecting groove.

6. A water tank type sludge scraping system for simulating a rectangular thickening tank according to claim 3, characterized in that: The bridge (2a) is also provided with a travel switch for limiting the range of movement, one end of the travel switch starting point protection limit normally closed switch (SQ4) is connected to the starting point protection limit signal input end of the central control machine (CPU), the other end of the travel switch starting point protection limit normally closed switch (SQ4) is connected to the power supply end of the switch power supply (U2), one end of the travel switch end point protection limit normally closed switch (SQ5) is connected to the end point protection limit signal input end of the central control machine (CPU), the other end of the travel switch end point protection limit normally closed switch (SQ5) is connected to the power supply end of the switch power supply (U2); The two in-place switches are photoelectric switches, and the detection ends of the two in-place switches are arranged downward, and the height of the bottom end of the in-place switch is higher than the height of the detection block (1a).

7. A water tank type sludge scraping system for simulating a rectangular thickening tank according to claim 6, characterized in that: There are two travel motors (6), namely a first travel motor (M1) and a second travel motor (M2), and they are driven by the same frequency converter (U1). The first travel motor (M1) is also equipped with a fifth fuse (QF5), and the second travel motor (M2) is also equipped with a sixth fuse (QF6). The data interaction end of the frequency converter (U1) is connected to the data interaction end of the central control machine (CPU), one end of the normally open contact of the fifth fuse (QF5) is connected to the power supply end of the switching power supply (U2), and the fifth fuse (QF5) is normally closed. The other end of the open contact is connected to the first travel motor fault signal input end of the central control machine (CPU); one end of the normally open contact of the sixth fuse (QF6) is connected to the power supply end of the switching power supply (U2), and the other end of the normally open contact of the sixth fuse (QF6) is connected to the second travel motor fault signal input end of the central control machine (CPU); the first alarm output end of the central control machine (CPU) is connected to one end of the buzzer (HA2), and the other end of the buzzer (HA2) is connected to the power supply end of the switching power supply (U2); the electric control box (3) is also provided with an audible and visual alarm and an emergency stop button (SB 3), the emergency stop signal input end of the central control machine (CPU) is connected to one end of the normally closed contact of the emergency stop button (SB3), the other end of the normally closed contact of the emergency stop button (SB3) is connected to the power supply end of the switching power supply (U2), the second alarm signal output end of the central control machine (CPU) is connected to the alarm signal input end of the sound and light alarm; the start indication signal output end of the central control machine (CPU) is connected to one end of the start indicator light (SB1), the other end of the start indicator light (SB1) is connected to the power supply end of the switching power supply (U2), the angle adjustment motor (5) is a stepping motor, The step pulse signal output end of the central control machine (CPU) is connected to the positive pole of the step pulse signal of the stepper motor, the negative pole of the step pulse signal of the stepper motor is connected to the negative pole of the switch power supply (U2), the step direction signal output end of the central control machine (CPU) is connected to the positive pole of the step direction signal input of the stepper motor, the negative pole of the step direction signal of the stepper motor is connected to the negative pole of the switch power supply (U2), the step brake signal output end of the central control machine (CPU) is connected to the positive pole of the step brake signal input of the stepper motor, and the negative pole of the step brake signal of the stepper motor is connected to the negative pole of the switch power supply (U2); The in-position switches are respectively a front in-position switch (SQ1) and a rear in-position switch (SQ2); one end of the normally open contact of the front in-position switch (SQ1) is connected to the front in-position signal input end of the central control machine (CPU), the common end of the front in-position switch (SQ1) is connected to the negative pole of the switching power supply (U2), and the power supply end of the front in-position switch (SQ1) is connected to the power supply end of the switching power supply (U2); one end of the normally open contact of the rear in-position switch (SQ2) is connected to the rear in-position signal input end of the central control machine (CPU), the common end of the rear in-position switch (SQ2) is connected to the negative pole of the switching power supply (U2), and the power supply end of the rear in-position switch (SQ2) is connected to the power supply end of the switching power supply (U2); One end of the travel switch starting point protection limit normally closed switch (SQ4) is connected to the starting point protection limit signal input end of the central control machine (CPU), and the other end of the travel switch starting point protection limit normally closed switch (SQ4) is connected to the power supply end of the switch power supply (U2). One end of the travel switch end point protection limit normally closed switch (SQ5) is connected to the end point protection limit signal input end of the central control machine (CPU), and the other end of the travel switch end point protection limit normally closed switch (SQ5) is connected to the power supply end of the switch power supply (U2).

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