Truss type double-scraper main push type mud scraper

Abstract

The utility model discloses a truss type double-scraper main push type mud scraper, which comprises a truss vehicle used for being erected on the top of a pool body and a pair of guide rails used for being fixed on the top of the pool body, the truss vehicle comprises a bridge frame, a walking mechanism, a walking motor and an underwater scraper assembly, the bottom of the bridge frame is connected on the guide rails in a sliding mode, and the bottom of the bridge frame is connected on the guide rails in a sliding mode. The bridge frame is arranged on the base and drives the bridge frame to slide through a walking motor, a supporting frame extending downwards is arranged on the bottom side of the bridge frame, the underwater scraper assembly is fixed to the bottom side of the supporting frame, horizontal rods extending forwards or backwards are arranged on the front side and the rear side of the bottom end of the supporting frame, and the underwater scraper assembly comprises a front scraper and a rear scraper. The front scraping plate and the rear scraping plate are rotationally connected to the horizontal rod on the front side or the horizontal rod on the rear side respectively, and angle adjusting mechanisms are independently arranged on the bridge frame and correspond to the front scraping plate and the rear scraping plate. The double scrapers are arranged at intervals front and back, so that mud scraping dead angles can be reduced as much as possible.

Description

Technical Field

[0001] The utility model relates to mud scraping equipment, in particular to a truss type double-scraper main push type mud scraper. Background Art

[0002] The main types of conventional scraping equipment for square thickening tanks in water plants are chain circulation type, monorail reciprocating type, hydraulic reciprocating type and crane-lifted rake type. However, existing crane-lifted scrapers have dead angles in scraping mud. For example, CN105999783B discloses a scraper comprising a guide rail, a top platform, a bucket and a power device, which drives the bucket to scrape mud. However, it is easy to produce dead angles on the back of the bucket, and it is easy to cause sediment accumulation at both ends of the square thickening tank. The existing crane-lifted rake scrapers all adopt the form of rear-drag scrapers. Since the original design of the existing square thickening tank uses hydraulic scraping equipment, the position of the mud collection tank is not suitable for the existing crane-lifted rake scraper, and the deposited sludge cannot be scraped into the mud collection tank of the existing square thickening tank of the water plant. Therefore, there is an urgent need for a scraper that can minimize dead angles in scraping mud. Utility Model Content

[0003] The utility model aims to solve the technical problems existing in the prior art, and particularly innovatively proposes a truss-type double-scraper main-pushing scraper, which has double scrapers arranged at intervals in front and behind, and can reduce dead angles in scraping mud as much as possible.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a truss-type double-scraper main-push type scraper, comprising a truss car for erecting on the top of the pool body and a pair of guide rails for fixing on the top of the pool body, the truss car comprises a bridge frame, a walking mechanism, a walking motor and an underwater scraper assembly, the bottom of the bridge frame is slidably connected to the guide rails, and the bridge frame is driven to slide by the walking motor, a downwardly extending support frame is provided on the bottom side of the bridge frame, the underwater scraper assembly is fixed on the bottom side of the support frame, and horizontal rods extending forward or backward are provided on the front and rear sides of the bottom end of the support frame, the underwater scraper assembly comprises a front scraper and a rear scraper, the front scraper and the rear scraper are respectively rotatably connected to the front or rear horizontal rods, and the front scraper and the rear scraper on the bridge frame are individually provided with angle adjustment mechanisms corresponding to the front scraper and the rear scraper;

[0005] It also includes a plurality of sludge concentration meters for installation on the side wall of the pool body, the sludge concentration signal output end of the sludge concentration meter is connected to the concentration signal input end of the central control machine, pressure sensors are provided on the scraping surfaces at the bottom ends of the front scraper and the rear scraper, and scrapers are provided on the pressure sensors. The pressure detection output end of the pressure sensor is connected to the pressure detection input end of the central control machine, the angle adjustment output end of the central control machine is connected to the angle adjustment input end of the angle adjustment mechanism, and the walking speed adjustment output end of the central control machine is connected to the walking motor speed adjustment input end.

[0006] In the above scheme: the front side of the front scraper and the rear side of the rear scraper are both provided with lifting rings; the angle adjustment mechanism includes an angle adjustment motor, a planetary gear reducer and a winch, the output end of the angle adjustment motor is connected to the planetary gear reducer, the output end of the planetary gear reducer is connected to the winch, and the winch is provided with an angle adjustment rope, and the other end of the angle adjustment rope is fixed to the corresponding lifting ring.

[0007] In the above solution: the angle adjustment motor is a stepping motor, and the travel motor is a three-phase asynchronous brake motor.

[0008] In the above scheme: the back of the bottom end of the front scraper and the rear scraper are both provided with guide wheels, which can prevent the scraper from running off the track. At the same time, when encountering pebbles, the guide wheels can roll on the pebbles, thereby lifting the scraper a little to prevent the pebbles from getting stuck in the scraper.

[0009] In the above scheme: the front and rear sides of the bridge are provided with in-position switches, and detection blocks are provided 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, and the walking output end of the central control machine is connected to the walking input end of the walking motor.

[0010] In the above solution: the bridge is further provided with a travel switch for limiting the range of movement, 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, and 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;

[0011] The two in-position switches are photoelectric switches, and the detection ends of the two in-position switches are both downwardly facing. The bottom ends of the in-position switches are higher than the height of the detection block. The travel of the gantry crane can be detected by the travel switch, forming a dual protection with the in-position switch, thereby improving the safety of the gantry crane movement.

[0012] 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, 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 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 switching power supply, the step direction signal output end of the central control machine 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 switching power supply, the step brake signal output end of the central control machine 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;

[0013] 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 power supply end of the front in-position switch is connected to the power supply end of the switching power supply; 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 power supply end of the rear in-position switch is connected to the power supply end of the switching power supply;

[0014] One end of the travel switch starting point protection limit normally closed switch is connected to the central control machine starting point protection limit signal input end, and the other end of the travel switch starting point protection limit normally closed switch is connected to the switch power supply end. One end of the travel switch end point protection limit normally closed switch is connected to the central control machine end point protection limit signal input end, and the other end of the travel switch end point protection limit normally closed switch is connected to the switch power supply end.

[0015] In summary, the beneficial effects of this utility model are: it can achieve efficient and accurate removal of sludge accumulated at the bottom of the pool without making major changes to the square pool body. It combines the advantages of intelligent control, high efficiency, low energy consumption, stability and reliability;

[0016] The scraping speed can be automatically adjusted based on the distribution of sludge in the sedimentation tank, achieving intelligent scraping. The scraper can detect data in real time based on the pressure sensor installed on the scraper's force-bearing surface. This data is used to adjust the scraper's opening degree and driving speed, while also controlling the operation of the sludge pump. By placing sensors and using automated control technology, the equipment can monitor parameters such as sludge concentration and scraper pressure in real time, ensuring the accuracy and efficiency of the scraping process, reducing manual intervention, and improving the convenience and intelligence of operation.

[0017] The double scrapers can improve the scraping efficiency and reduce the dead angle of scraping. At the same time, the stability of the truss structure and the high efficiency of power transmission can be used to ensure the continuity and uniformity of the scraping process, greatly improving the efficiency and quality of sludge removal. The truss not only enhances the stability and carrying capacity of the equipment, but also ensures the reliable operation of the equipment in harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view of the utility model mud scraper.

[0019] Figure 2 It is a top view of the utility model mud scraper.

[0020] Figure 3 It is a top view of the utility model mud scraper.

[0021] Figure 4 It is a top view of the utility model mud scraper.

[0022] Figure 5 It is a top view of the utility model mud scraper.

[0023] Figure 6 It is a top view of the utility model mud scraper.

[0024] Figure 7 It is a top view of the utility model mud scraper. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the following embodiments and accompanying drawings:

[0026] like Figures 1 to 7As shown, a truss-type, dual-scraper, push-type mud scraper includes a gantry 2 for mounting on top of a tank 1 and a pair of guide rails 1d for securing to the top of the tank 1. The gantry 2 includes a bridge 2a, a travel mechanism, a travel motor 6, and an underwater scraper assembly. A mud trough 1a is provided at the front of the tank 1. The bottom of the bridge 2a is slidably connected to the guide rails 1d and driven to slide by the travel motor 6. A downwardly extending support frame is provided at the bottom of the bridge 2a, and the underwater scraper assembly is secured to the bottom of the support frame. Horizontal bars extending forward or backward are provided on both the front and rear sides of the bottom end of the support frame. The underwater scraper assembly includes a front scraper 2c and a rear scraper 2b. The front scraper 2c and the rear scraper 2b are pivotally connected to the front and rear horizontal bars, respectively. Angle adjustment mechanisms are provided on the bridge 2a for each of the front and rear scrapers 2c and 2b.

[0027] The tank also includes multiple sludge concentration meters for installation on the sidewalls of the tank body 1. The sludge concentration signal outputs of the sludge concentration meters are connected to the concentration signal inputs of the central control unit (CPU). Pressure sensors 2d are installed on the scraping surfaces at the bottom ends of the front scraper 2c and the rear scraper 2b. These pressure sensors 2d are equipped with scraper blades 2e. The pressure detection outputs of the pressure sensors 2d are connected to the pressure detection inputs of the central control unit (CPU). The angle adjustment output of the CPU is connected to the angle adjustment input of the angle adjustment mechanism, while the travel speed adjustment output of the CPU is connected to the speed adjustment input of the travel motor 6. Specifically, a lifting ring 2f is installed on the front side of the front scraper 2c and the rear side of the rear scraper 2b. The angle adjustment mechanism includes an angle adjustment motor 5, a planetary gear reducer 5a, and a winch 4. The output of the angle adjustment motor 5 is connected to the planetary gear reducer 5a. The output of the planetary gear reducer 5a is connected to the winch 4, which is equipped with an angle adjustment rope 4a, the other end of which is fixed to the corresponding lifting ring 2f. In this embodiment, the angle adjustment motor 5 is a stepper motor, and the travel motor 6 is a three-phase asynchronous brake motor. Guide wheels 2g are provided on the back of the bottom ends of the front and rear scrapers 2c and 2b. These wheels prevent the scraper from straying and, when encountering small stones, allow the guide wheels 2g to roll over them, thereby slightly raising the scraper and preventing the stones from getting stuck.

[0028] Both sides of the bridge 2a are equipped with in-position switches, and detection blocks 1a are set at both ends of the guide rail 1d corresponding to the in-position switches. The in-position detection output of the in-position switch is connected to the in-position detection input of the central control machine CPU, and the travel output of the central control machine CPU is connected to the travel input of the travel motor 6.

[0029] Bridge 2a is also equipped with a travel switch for limiting the range of movement. One end of this travel switch's starting limit protection normally closed switch SQ4 is connected to the starting limit protection signal input terminal of the central control unit's CPU, and the other end is connected to the power supply terminal of switching power supply U2. One end of the travel switch's end limit protection normally closed switch SQ5 is connected to the end limit protection signal input terminal of the central control unit's CPU, and the other end is connected to the power supply terminal of switching power supply U2.

[0030] The two in-position switches are photoelectric switches, and the detection ends of both switches are set downward. The bottom of the in-position switches is higher than the height of the detection block 1a. The travel switches can detect the travel of the gantry crane, forming a dual protection with the in-position switches, improving the safety of the gantry crane movement.

[0031] There are two travel motors 6, namely the first travel motor M1 and the second travel motor M2, and they are driven by the same inverter 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 fifth fuse QF6. The data exchange end of the inverter U1 is connected to the data exchange 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 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 electrical control box 3 is also equipped with an audible and visual alarm and an emergency stop button SB3. The emergency stop signal input of the central control unit CPU is connected to one end of the normally closed contact of the emergency stop button SB3, while the other end of the normally closed contact of the emergency stop button SB3 is connected to the power supply terminal of the switching power supply U2. The second alarm signal output of the central control unit CPU is connected to the alarm signal input of the audible and visual alarm. The start indication signal output of the central control unit CPU is connected to one end of the start indicator light SB1, while the other end of the start indicator light SB1 is connected to the power supply terminal of the switching power supply U2. The angle adjustment motor 5 is a stepper motor. The step pulse signal output of the central control unit CPU is connected to the positive terminal of the stepper motor's step pulse signal. The negative terminal of the step pulse signal of the stepper motor is connected to the negative terminal of the switching power supply U2. The step direction signal output of the central control unit CPU is connected to the positive terminal of the step direction signal input of the stepper motor, while the negative terminal of the step direction signal of the stepper motor is connected to the negative terminal of the switching power supply U2. The step brake signal output of the central control unit CPU is connected to the positive terminal of the step brake signal input of the stepper motor, while the negative terminal of the step brake signal of the stepper motor is connected to the negative terminal of the switching power supply U2.

[0032] The in-position switches are front in-position switch SQ1 and rear in-position switch SQ2. The normally open contact of front in-position switch SQ1 is connected to the front in-position signal input terminal of the central control unit CPU, and the common terminal of front in-position switch SQ1 is connected to the negative terminal of switching power supply U2. The power terminal of front in-position switch SQ1 is connected to the power supply terminal of switching power supply U2. The normally open contact of rear in-position switch SQ2 is connected to the rear in-position signal input terminal of the central control unit CPU. The common terminal of rear in-position switch SQ2 is connected to the negative terminal of switching power supply U2, and the power terminal of rear in-position switch SQ2 is connected to the power supply terminal of switching power supply U2.

[0033] One end of the normally closed switch SQ4 (starting point protection limit switch) is connected to the starting point protection limit signal input terminal of the central control computer CPU, and the other end is connected to the power supply terminal of the switching power supply U2. One end of the normally closed switch SQ5 (end point protection limit switch) is connected to the end point protection limit signal input terminal of the central control computer CPU, and the other end is connected to the power supply terminal of the switching power supply U2.

[0034] The scraper of this technical solution can be flexibly designed to adapt to rectangular thickening tanks of different sizes, and can find a suitable configuration solution to meet different needs. At the same time, the equipment also has good scalability and can be adjusted and upgraded according to changes in processing volume to adapt to the dynamic changes in tailwater treatment needs. At the same time, the structural design of the equipment fully considers the convenience of maintenance and maintenance. Most components are easy to disassemble and replace, reducing maintenance costs and downtime. The intelligent monitoring system can provide early warning of potential failures, facilitate timely maintenance, and ensure the long-term stable operation of the equipment. The material selection and anti-corrosion treatment of the equipment ensure that it can still maintain good performance and a long service life in an environment with long-term contact with sludge water.

[0035] When in use, load the configuration parameters, set the scraper start value, the maximum scraping volume of the scraper in a single time, the maximum scraper pressure and the maximum boost pressure, and perform self-tests on each component. If the self-test results of each component are normal, proceed to the next step. If an abnormality occurs, the central control computer CPU will issue an alarm signal. The configuration parameters include the descent depth of the sludge concentration meter, the distance from the total height of the pool 1 bottom to the bottom of the sludge concentration meter, and the distance between the scraper blade and the two ends of the pool 1.

[0036] The sludge concentration meter is used for detection, and the central control computer CPU analyzes the data detected by the sludge concentration meter. If the sludge concentration exceeds the set scraper start value, the central control computer CPU will issue a scraping instruction to the scraper;

[0037] If no scraping instruction is received, the scraper enters standby mode and performs real-time detection through the sludge concentration meter. If a scraping instruction is received, scraping begins.

[0038] The central control machine CPU formulates a sludge scraping plan. The central control machine CPU generates a three-dimensional surface diagram of the sludge concentration distribution in the tank body 1 based on the sludge concentration signals detected by multiple groups of sludge concentration meters arranged on the tank body 1. It also compares the maximum sludge deposition in the tank body 1 with the maximum sludge scraping volume of the scraper in a single time. If the maximum sludge scraping volume of the scraper in a single time is not exceeded, the scraper operates normally (the scraper can complete the sludge scraping in a single complete operation). If the maximum sludge scraping volume of the scraper in a single time is exceeded, the central control machine CPU drives the scraper to operate repeatedly.

[0039] The central control machine CPU adjusts the front scraper 2c to the initial angle and starts the travel motor 6. The travel motor 6 drives the underwater scraper assembly to scrape the silt. The scraper pressure data is collected in real time through the pressure sensor of the front scraper 2c. If the detected pressure is greater than the maximum scraper pressure, the central control machine CPU drives the angle adjustment mechanism to adjust the inclination angle of the front scraper 2c, so that the bottom of the front scraper 2c is raised, the thickness of the scraped mud is reduced, and the mud is scraped; the scraper pressure data is re-detected through the pressure sensor of the front scraper 2c. If the detected pressure is reduced, S10 is executed.

[0040] If the detected pressure increase is less than the maximum pressure increase, the tilt angle of the front scraper 2c is further adjusted to raise the bottom of the front scraper 2c. If the detected pressure increase is greater than the maximum pressure increase, the central control unit CPU drives the angle adjustment mechanism to adjust the front scraper 2c to the highest position and simultaneously sends a stop command to the travel motor 6 to stop scraping mud. The central control unit CPU also issues an alarm signal for workers to troubleshoot the problem.

[0041] The central control machine CPU drives the scraper to scrape the mud. When the in-position switch SQ1 detects that it has reached the front end of the pool body 1, the central control machine CPU drives the front scraper 2c and the rear scraper 2b to rotate to a horizontal state to lift the bottom ends of the front scraper 2c and the rear scraper 2b, and drives the front scraper 2c and the rear scraper 2b back to the rear end of the pool body 1 through the walking mechanism;

[0042] When the rear position switch SQ2 detects that the rear end of the pool body 1 has been reached, the central control machine CPU drives the front scraper 2c and the rear scraper 2b to rotate to a vertical state to scrape the mud; repeat the scraping steps;

[0043] Until the scraping operation is completed.

Claims

1. A truss-type double-scraper main push-type scraper, comprising a truss vehicle (2) for erecting on the top of a tank body (1) and a pair of guide rails (1d) for fixing on the top of the tank body (1), the truss vehicle (2) comprising a bridge (2a), a traveling mechanism, a traveling motor (6) and an underwater scraper assembly, the bottom of the bridge (2a) being slidably connected to the guide rails (1d), and the traveling motor (6) driving the bridge (2a) to slide, characterized in that: A support frame extending downward is provided on the bottom side of the bridge frame (2a); the underwater scraper assembly is fixed on the bottom side of the support frame; horizontal rods extending forward or backward are provided on both the front and rear sides of the bottom end of the support frame; the underwater scraper assembly includes a front scraper (2c) and a rear scraper (2b); the front scraper (2c) and the rear scraper (2b) are rotatably connected to the horizontal rod on the front side or the rear side, respectively; and angle adjustment mechanisms are separately provided on the bridge frame (2a) corresponding to the front scraper (2c) and the rear scraper (2b); It also includes a plurality of sludge concentration meters for installation on the side wall of the tank body (1), wherein the sludge concentration signal output end of the sludge concentration meter is connected to the concentration signal input end of the central control machine (CPU), the scraping surfaces at the bottom ends of the front scraper (2c) and the rear scraper (2b) are both provided with pressure sensors (2d), and the pressure sensors (2d) are provided with scraping blades (2e), the pressure detection output end of the pressure sensor (2d) is connected to the pressure detection input end of the central control machine (CPU), the angle adjustment output end of the central control machine (CPU) is connected to the angle adjustment input end of the angle adjustment mechanism, and the travel speed adjustment output end of the central control machine (CPU) is connected to the speed adjustment input end of the travel motor (6).

2. The truss-type double-scraper main push-type scraper according to claim 1, characterized in that: The front side of the front scraper (2c) and the rear side of the rear scraper (2b) are both provided with a lifting ring (2f); the angle adjustment mechanism comprises an angle adjustment motor (5), a planetary gear reducer (5a) and a winch (4); 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); the winch (4) is provided with an angle adjustment rope (4a), and the other end of the angle adjustment rope (4a) is fixed to the corresponding lifting ring (2f).

3. The truss-type double-scraper main push-type scraper according to claim 2, characterized in that: The angle adjustment motor (5) is a stepping motor, and the travel motor (6) is a three-phase asynchronous brake motor.

4. The truss-type double-scraper main push-type scraper according to claim 1, characterized in that: Guide wheels (2g) are provided on the back sides of the bottom ends of the front scraper (2c) and the rear scraper (2b).

5. The truss-type double-scraper main push-type scraper according to claim 1, characterized in that: Both the front and rear sides of the bridge (2a) are provided with in-position switches, and detection blocks (1a) are provided at both ends of the guide rail (1d) 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 (CPU), and the travel output end of the central control machine (CPU) is connected to the travel input end of the travel motor (6).

6. The truss-type double-scraper main push-type scraper according to claim 5, 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 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), 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); The two in-position switches are photoelectric switches, and the detection ends of the two in-position switches are both arranged downward, and the height of the bottom ends of the in-position switches is higher than the height of the detection block (1a).

7. The truss-type double-scraper main push-type scraper according to claim 6, characterized in that: There are two walking motors (6), namely a first walking motor (M1) and a second walking motor (M2), which are driven by the same frequency converter (U1). The first walking motor (M1) is also equipped with a fifth fuse (QF5), and the second walking 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), and 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). 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 (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), 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 The step pulse signal output terminal of the central control machine (CPU) 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 (U2). The step direction signal output terminal of the central control machine (CPU) 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 (U2). The step brake signal output terminal of the central control machine (CPU) 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 (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 computer (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 computer (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); 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 computer (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 computer (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).

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