Crawler-type emulsion lifting platform for coal mine underground coal face

Abstract

The crawler-type emulsion lifting platform for the underground coal mine comprises a crawler walking supporting mechanism, a hydraulic control system and a lifting platform body, the crawler-type emulsion lifting platform body drives an emulsion motor to rotate and work through high-pressure emulsion from an emulsion pump station, and crawler walking and supporting stand column stretching and retracting are achieved; therefore, stable and reliable walking and supporting functions are provided; a first hydraulic manifold block and a second hydraulic manifold block in the hydraulic control system work cooperatively, so that a platform lifting hydraulic cylinder can accurately control the lifting platform to ascend and descend, and a hydraulic connector for a handheld emulsion tool and a hydraulic connector for a booster pump are arranged on the second hydraulic manifold block. Various operations such as drilling, anchor rod (cable) mounting, tensioning, dismounting and cutting can be conveniently carried out on two sides and a top plate of a coal mining roadway, and meanwhile, fully-mechanized mining equipment of a coal mining working face can be maintained. The device has the effects that the working efficiency is improved, and the labor intensity of operators is reduced.

Description

Technical Field

[0001] The present application relates to the field of equipment lifting platforms, and in particular to a crawler-type emulsion lifting platform for coal mining working faces in underground coal mines. Background Art

[0002] Underground coal mines are restricted by the environment and conditions of the tunnels. When performing aerial operations at coal mining faces or tunnels, such as hydraulic support maintenance at coal mining faces and anchor (cable) support, anchor withdrawal, cutting and other operations on the tunnel roof, traditional ladders not only pose safety hazards, but also require the assistance of multiple people during operations. They are also unable to reliably perform hydraulic support maintenance or drilling, anchor (cable) installation, tensioning, disassembly and cutting of the roof, resulting in low work efficiency and difficulty in meeting the needs of modern underground coal mines.

[0003] Most existing crawler hydraulic lifting platforms use their own power (diesel engine, motor) to drive the hydraulic motor with mineral oil as the transmission medium to rotate, thereby driving the crawler to move and the hydraulic cylinder to lift, so as to achieve high-altitude operations. These platforms are powered by motors and diesel engines. Both are used in coal mine operations.

[0004] Since there are explosion-proof safety requirements in coal mines, if the motor drive mode is adopted, the crawler hydraulic lifting platform needs to be equipped with explosion-proof switches, explosion-proof motors, hydraulic pump stations and other equipment, resulting in heavy weight and large volume; if the diesel engine drive mode is adopted, the crawler hydraulic lifting platform needs to be equipped with diesel engines, hydraulic pump stations and other equipment, which will not only be large in size, but also cause exhaust gas to pollute the underground environment. In addition, the crawler hydraulic lifting platform uses mineral oil as the transmission medium of the hydraulic system, which has certain safety hazards. In addition, the crawler hydraulic lifting platform is large in size and heavy in weight, which is not suitable for the narrow coal mining tunnels in coal mines. It is inconvenient to turn around and it is difficult to adapt to the actual operation needs of the underground tunnels in coal mines, which affects the work efficiency. Summary of the invention

[0005] In order to improve the working efficiency in underground coal mines, the present application provides a crawler-type emulsion lifting platform for coal mining working faces in underground coal mines.

[0006] The crawler-type emulsion lifting platform for coal mining working face in coal mines provided in this application adopts the following technical scheme: A crawler type emulsion lifting platform for coal mining working face in underground coal mine, comprising: A crawler walking support mechanism, the crawler walking support mechanism includes a base, a crawler and an emulsion motor driving the crawler are arranged below the base, the emulsion motor is an emulsion motor with a speed reduction mechanism or an emulsion motor with a speed reduction mechanism and a braking mechanism, the emulsion motor is driven by high-pressure emulsion provided by an emulsion pump station of a coal mining face, support columns are also arranged around the base, the support columns are driven to extend and retract after the high-pressure emulsion from the emulsion pump station is decompressed, and support the entire platform; A hydraulic control system, the hydraulic control system is connected to the high-pressure emulsion of the emulsion pump station of the coal mining face, and includes a first hydraulic integrated block and a second hydraulic integrated block, the first hydraulic integrated block is integrated with a ball valve, a high-pressure filter, a relief valve, a pressure gauge, a pressure reducing valve and a multi-way reversing valve, and the second hydraulic integrated block is integrated with a ball valve, a pressure reducing valve, a multi-way reversing valve and a pressure gauge; A lifting platform, which is arranged above the base, includes a lifting frame, a platform lifting hydraulic cylinder arranged on the lifting frame and driving the lifting frame to lift, and a load-bearing basket arranged on the top platform of the lifting frame. The first hydraulic integrated block is arranged above the base and is connected to the supporting column and the motor. A second hydraulic integrated block is arranged in the load-bearing basket and is connected to the platform lifting hydraulic cylinder. The high-pressure emulsion from the second hydraulic integrated block controls the extension and retraction of the platform lifting hydraulic cylinder after reducing pressure, thereby realizing stable and reliable lifting of the lifting platform. The second hydraulic integrated block is provided with a hydraulic interface for a handheld emulsion tool and a hydraulic interface for a booster pump.

[0007] By adopting the above technical scheme, the crawler-type emulsion lifting platform drives the emulsion motor by utilizing the high-pressure emulsion from the emulsion pump station of the coal mining face. After the high-pressure emulsion is decompressed, it drives the support columns to extend and retract, thereby realizing crawler walking and extension and retraction of the support columns, thereby providing stable and reliable walking and supporting functions. At the same time, the first hydraulic integrated block and the second hydraulic integrated block in the hydraulic control system work together, so that the platform lifting hydraulic cylinder can accurately control the rise and fall of the lifting platform, and a second hydraulic integrated block is provided in the load-bearing basket, and a hydraulic interface for a hand-held emulsion tool and a hydraulic interface for a booster pump are provided on the second hydraulic integrated block, which is convenient for drilling holes on the two sides and roof of the coal mining tunnel, installing anchor rods (cables), tensioning, disassembly and cutting, etc., which significantly improves work efficiency and reduces the labor intensity of operators.

[0008] Preferably, the crawler walking mechanism is driven by the emulsion motor and moves under the base.

[0009] By adopting the above technical solution, the crawler walking mechanism is driven by an emulsion motor to achieve walking under the base, so that the crawler emulsion lifting platform can adapt to the uneven ground of the coal mining working face and coal mining tunnels in the coal mine, improve the walking stability, and at the same time use the high-pressure emulsion from the emulsion pump station as the driving source, eliminating the safety hazards of using mineral oil and realizing the single power of the working face.

[0010] Preferably, it also includes a booster pump, which is arranged on the top platform of the lifting frame, the booster pump liquid inlet is connected to the hydraulic interface for the booster pump on the second hydraulic integrated block, and the booster pump high-pressure outlet is provided with a pressure gauge and connected to the required ultra-high pressure portable hydraulic machine.

[0011] By adopting the above technical scheme, the pressure provided by the emulsion pump station is generally lower than 31MPa. A hydraulic interface for a booster pump is provided on the second hydraulic integrated block, and is connected to portable tensioning, disassembly and cutting machines requiring ultra-high pressure liquid through the booster pump. The booster pump is arranged on the top platform of the lifting frame, and its liquid inlet is connected to the hydraulic interface for the booster pump on the second hydraulic integrated block. A pressure gauge is provided at the high-pressure outlet of the booster pump and is connected to the portable hydraulic machine requiring ultra-high pressure, thereby realizing ultra-high pressure liquid supply to the portable hydraulic machine and improving the working efficiency and reliability of the portable hydraulic machine and tool.

[0012] Preferably, the handheld emulsion tools also include a handheld emulsion wrench, a handheld emulsion drill, a handheld emulsion saw, a portable emulsion tensioning device, a water cutting device, and the like.

[0013] By adopting the above technical scheme, by setting up handheld emulsion tools including handheld emulsion wrenches, handheld emulsion drills, handheld emulsion saws, portable emulsion tensioning equipment and water cutting equipment, it is convenient to drill holes on the sides and roof of coal mining tunnels, install, tension, disassemble and cut anchor rods (cables), and also convenient to maintain comprehensive mining equipment, thereby improving work efficiency and reducing the labor intensity of operators. The integration of handheld tools makes the platform more versatile and has a wider range of applications.

[0014] Preferably, an intelligent recorder is provided at the portable emulsion tensioning device, and the intelligent recorder records the tensioning position and the tensioning force.

[0015] By adopting the above technical scheme, when the coal mine is subjected to tunnel tensioning operations, it is necessary to record the operation point and the tensioning force. By accurately recording the tensioning position and the tensioning force, it can ensure that the tunnel tensioning operation is carried out within a safe range, which helps to prevent safety accidents such as tunnel deformation and collapse caused by excessive or insufficient tensioning, thereby protecting the lives of underground workers. The recorded data of the tensioning position and the tensioning force can provide important references for subsequent tunnel maintenance, reinforcement and other operations, and guide subsequent operations. By setting up an intelligent recorder, it is very convenient to provide data basis for operators.

[0016] Preferably, the first hydraulic integrated block is integrated with a ball valve, a high-pressure filter, a relief valve, a pressure gauge, a pressure reducing valve and a multi-way reversing valve; the second hydraulic integrated block is integrated with a ball valve, a pressure reducing valve, a multi-way reversing valve and a pressure gauge.

[0017] By adopting the above technical scheme, the first hydraulic integrated block is integrated with a ball valve, a high-pressure filter, a relief valve, a pressure gauge, a pressure reducing valve and a multi-way reversing valve, and the second hydraulic integrated block is integrated with a ball valve, a pressure reducing valve, a multi-way reversing valve and a pressure gauge, thereby achieving precise control and efficient distribution of high-pressure emulsion, ensuring the smooth operation of the crawler walking support mechanism and the lifting platform, and ensuring the efficient use of hand-held emulsion tools.

[0018] Preferably, the overflow valve of the first hydraulic integrated block is used to adjust the pressure in the first hydraulic integrated block.

[0019] By adopting the above technical solution, the overflow valve of the first hydraulic integrated block in the hydraulic control system can effectively adjust the pressure in the first hydraulic integrated block, ensuring the smooth operation of the system under high-pressure drive, avoiding damage to system components caused by overpressure, and improving the working reliability of the entire crawler emulsion lifting platform.

[0020] Preferably, the second hydraulic integrated block is arranged in the carrying basket, and its liquid inlet is connected to the liquid outlet of the first hydraulic integrated block. The second hydraulic integrated block is connected to the platform lifting hydraulic cylinder, and the second hydraulic integrated block is provided with a hydraulic interface for a handheld emulsion tool and a hydraulic interface for a booster pump.

[0021] By adopting the above technical solution, the second hydraulic integrated block is arranged in the carrying basket, the liquid inlet of which is connected to the liquid outlet of the first hydraulic integrated block, which is connected to the platform lifting hydraulic cylinder, and is provided with a hydraulic interface for a handheld emulsion tool and a hydraulic interface for a booster pump, thereby achieving stable and reliable platform lifting, facilitating the connection and use of handheld emulsion tools, and improving work efficiency.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. The crawler-type emulsion lifting platform drives the emulsion motor by using the high-pressure emulsion from the emulsion pump station. At the same time, the high-pressure emulsion drives the extension and retraction of the support column after decompression, so as to realize crawler walking and extension and retraction of the support column, thereby providing stable and reliable walking and supporting functions. At the same time, the first hydraulic integrated block and the second hydraulic integrated block in the hydraulic control system work together, so that the platform lifting hydraulic cylinder can accurately control the rise and fall of the lifting platform. The second hydraulic integrated block is provided in the load basket and is connected with the platform lifting hydraulic cylinder. The high-pressure emulsion from the second hydraulic integrated block controls the extension and retraction of the platform lifting hydraulic cylinder after decompression, so as to realize the stable and reliable lifting and lowering of the lifting platform. At the same time, the second hydraulic integrated block is provided with a hydraulic interface for a handheld emulsion tool and a hydraulic interface for a booster pump, which is convenient for drilling, anchor (cable) installation, tensioning, disassembly and cutting of coal mining tunnels and roofs, significantly improving work efficiency and reducing the labor intensity of operators; 2. The second hydraulic integrated block installed in the carrying basket is provided with hydraulic interfaces for handheld emulsion tools and hydraulic interfaces for booster pumps, which are connected to handheld emulsion tools and booster pumps respectively, so as to facilitate drilling, anchor (cable) installation, tensioning, disassembly and cutting in coal mining tunnels and roofs, and enhance the versatility of the platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a schematic structural diagram of a crawler-type emulsion lifting platform for an underground coal mining working face in a coal mine.

[0024] Figure 2 It is a schematic diagram of the structural principle of the first hydraulic integrated block.

[0025] Figure 3 It is a schematic diagram of the structural principle of the second hydraulic integrated block.

[0026] Explanation of the reference numerals in the accompanying drawings: 1. crawler walking support mechanism; 11. base; 12. crawler; 13. support column; 14. emulsion motor; 2. hydraulic control system; 21. first hydraulic integrated block; 22. second hydraulic integrated block; 3. lifting platform; 31. lifting frame; 32. platform lifting hydraulic cylinder; 33. load-bearing basket; 4. booster pump. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-3 This application is described in further detail.

[0028] Reference Figure 1 A crawler-type emulsion lifting platform for coal mining working face in underground coal mine includes a crawler 12 walking support mechanism 1, a hydraulic control system 2 and a lifting platform 3, wherein the crawler 12 walking support mechanism 1 includes a base 11, a crawler 12 and a driving device, and support columns 13 are arranged around the base 11.

[0029] Specifically, the base 11 can be welded with steel plates, and the thickness of the steel plates can be 10 mm to ensure the firmness and durability of the platform. The base 11 also includes reinforcing ribs, and the ribs can be arranged in a staggered manner to improve the overall rigidity of the base 11. The track 12 is installed under the base 11, and the specific structure of the track 12 can be a rubber track 12 or a steel track 12. The rubber track 12 has the advantages of low noise and low wear, and is suitable for the working environment underground in coal mines. For example, the rubber track 12 can select a rubber track 12 section with a width of 250 mm, and high-strength metal joints can be used to connect adjacent track 12 sections. The steel track 12 has the advantage of large bearing capacity, and a steel plate track 12 with a width of 500 mm is selected, and each section of the steel plate is 15 mm thick and connected by a special connecting hook.

[0030] The driving device can be an emulsion motor 14, or an emulsion motor 14 with a reduction device, or even an emulsion motor 14 with a reduction device and a brake device. The emulsion motor 14 can select a motor with a flow rate of 10 liters / minute, and the power requirement is at least 5 kilowatts. The internal structure can adopt a swash plate structure to improve the working efficiency of the motor. The reduction device can adopt a planetary gear reducer, which has a strong load-bearing capacity and high transmission efficiency. For example, in a planetary gear reducer, the module of the gear is 3 mm, and the number of helical gears is 24 teeth. The braking device can select an electromagnetic brake, and the braking torque of the brake is 500 Nm to ensure the stability of the platform when it is stopped.

[0031] The supporting columns 13 are arranged around the base 11, and the number of the columns can be four. These columns can adopt a cylinder structure and can be extended and retracted by hydraulic drive. Specifically, the diameter of the cylinder can be 75 mm, the diameter of the piston rod is 35 mm, and the maximum telescopic length of the column is 1500 mm. After the high-pressure emulsion is decompressed, the telescopic action of the column is controlled by a multi-way reversing valve. Such a design ensures the supporting capacity of the column at different heights.

[0032] The hydraulic control system 2 includes a first hydraulic integrated block 21 and a second hydraulic integrated block 22. The first hydraulic integrated block 21 is integrated with a ball valve, a high-pressure filter, a relief valve, a pressure gauge, a pressure reducing valve and a multi-way reversing valve. The ball valve can be a ball valve with a nominal pressure of 30 MPa, and the high-pressure filter can be a high-pressure filter with a filtration accuracy of 10 microns to remove impurities in the emulsion. The pressure adjustment range of the relief valve can be between 20 MPa and 40 MPa to ensure the safe operation of the entire system. The pressure gauge can be a pressure gauge with a nominal pressure of 60 MPa to display the working pressure in the system. The pressure reducing valve is designed to be adjustable, and the pressure adjustment range can be between 6 MPa and 20 MPa. The multi-way reversing valve can be a multi-way reversing valve with a nominal pressure of 30 MPa to ensure the efficient operation of the hydraulic system. Multiple hydraulic components adopt a compact integrated design to save space and improve reliability.

[0033] The second hydraulic integrated block 22 is integrated with a ball valve, a pressure reducing valve, a multi-way reversing valve and a pressure gauge. The ball valve also uses a ball valve with a nominal pressure of 30 MPa, and the pressure regulating range of the pressure reducing valve can be 6 MPa to 20 MPa. The multi-way reversing valve can use a multi-way reversing valve with a nominal pressure of 30 MPa, including a hydraulic interface for a handheld emulsion tool and a hydraulic interface for a booster pump 4. The integrated block ensures that the platform lifting hydraulic cylinder 32 in the carrying basket 33 can be reliably extended and retracted to achieve smooth lifting and lowering of the lifting platform 3.

[0034] The lifting platform 3 is arranged above the base 11, and includes a lifting frame 31, a platform lifting hydraulic cylinder 32 arranged on the lifting frame 31 and driving the lifting frame 31 to lift and lower, and a carrying basket 33 arranged on the top platform of the lifting frame 31. The specific structure of the platform lifting hydraulic cylinder 32 can be an oil cylinder with a diameter of 75 mm and a piston rod with a diameter of 35 mm. A second hydraulic integrated block 22 is arranged in the carrying basket 33, which is connected to the platform lifting hydraulic cylinder 32. The high-pressure emulsion from the second hydraulic integrated block 22 controls the extension and contraction of the platform lifting hydraulic cylinder 32 after decompression, so as to realize the stable and reliable lifting and lowering of the lifting platform 3. Handheld emulsion tools are installed in the carrying basket 33, and the handheld emulsion tools include handheld emulsion wrenches, handheld emulsion drills, handheld emulsion saws, portable emulsion tensioning equipment, and water cutting equipment. For example, the handheld emulsion drill can use a special motor driven by high-pressure emulsion, the motor diameter is 70 mm, the output power is at least 7 kilowatts, and it can provide sufficient power for drilling operations. The drill rod is made of high-strength alloy steel and can be 600 mm in length. The drill bit can be replaced with different types of drill bits according to actual needs. For example, carbide drill bits are suitable for coal seams with higher hardness, and silicon carbide drill bits are suitable for coal seams with medium hardness. The portable emulsion tensioning device is equipped with an intelligent recorder to record the tensioning position and tensioning force, so that operators can view data in real time. For example, the intelligent recorder can choose a recorder with a 3.5-inch color touch screen, which can save at least 500 records.

[0035] This embodiment also includes a booster pump 4 structure. The booster pump 4 is arranged on the top platform of the lifting platform 3. The liquid inlet of the booster pump 4 is connected to the booster pump 4 on the second hydraulic integrated block 22 by a hydraulic interface, and a pressure gauge is provided at the high-pressure liquid outlet to monitor the working pressure of the system. The design pressure of the booster pump 4 can reach 60 MPa, and the maximum flow rate is 2 liters / minute, which can provide ultra-high pressure emulsion for portable hydraulic machinery and tools. The booster pump 4 can not only be installed on the top of the platform, but also can be installed on one side of the base 11. Such a design not only optimizes space utilization, but also facilitates maintenance and overhaul.

[0036] The implementation principle of a crawler-type emulsion lifting platform for an underground coal mining face in a coal mine according to an embodiment of the present application is as follows: the crawler-type emulsion lifting platform utilizes high-pressure emulsion from an emulsion pump station to drive the emulsion motor 14 to work, thereby realizing the movement of the crawler 12 and the extension and retraction of the support column 13, thereby providing stable and reliable walking and supporting functions. At the same time, the first hydraulic integrated block 21 and the second hydraulic integrated block 22 in the hydraulic control system 2 work in coordination, so that the platform lifting hydraulic cylinder 32 can accurately control the rise and fall of the lifting platform 3, and a hydraulic interface for a handheld emulsion tool and a hydraulic interface for a booster pump are provided in the carrying basket 33, which is convenient for drilling, anchor (cable) installation, tensioning, disassembly and cutting in the coal mining tunnel, and can also perform maintenance on the comprehensive mining equipment of the coal mining face, significantly improving work efficiency and reducing the labor intensity of operators.

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A crawler type emulsion lifting platform for coal mining working face in underground coal mine, characterized in that: include: A crawler walking support mechanism (1), the crawler walking support mechanism (1) comprising a base (11), a crawler (12) and an emulsion motor (14) for driving the crawler (12) to walk are arranged below the base (11), the emulsion motor (14) is an emulsion motor with a speed reduction mechanism or an emulsion motor with a speed reduction mechanism and a braking mechanism, the emulsion motor (14) is driven by high-pressure emulsion provided by an emulsion pump station of a coal mining face, support columns (13) are also arranged around the base (11), the support columns (13) are driven to expand and contract after the high-pressure emulsion from the emulsion pump station is decompressed, and support the entire platform; A hydraulic control system (2), the hydraulic control system (2) being in communication with the high-pressure emulsion of the emulsion pump station of the coal mining face, comprising a first hydraulic integrated block (21) and a second hydraulic integrated block (22), the first hydraulic integrated block (21) being integrated with a ball valve, a high-pressure filter, a relief valve, a pressure gauge, a pressure reducing valve and a multi-way reversing valve, and the second hydraulic integrated block (22) being integrated with a ball valve, a pressure reducing valve, a multi-way reversing valve and a pressure gauge; A lifting platform (3), the lifting platform (3) is arranged above the base (11), comprising a lifting frame (31), a platform lifting hydraulic cylinder (32) arranged on the lifting frame (31) and driving the lifting frame (31) to lift and lower, and a carrying basket (33) arranged on the top platform of the lifting frame (31), the first hydraulic integrated block (21) being arranged above the base (11) and being connected to the supporting column (13) and the motor (14), the carrying basket (33) being provided with a second hydraulic integrated block (22) being connected to the platform lifting hydraulic cylinder (32), the high-pressure emulsion from the second hydraulic integrated block (22) being decompressed to control the extension and retraction of the platform lifting hydraulic cylinder (32), thereby realizing stable and reliable lifting and lowering of the lifting platform, the second hydraulic integrated block (22) being provided with a hydraulic interface for a handheld emulsion tool and a hydraulic interface for a booster pump.

2. The crawler-type emulsion lifting platform for coal mining working face in underground coal mine according to claim 1 is characterized in that: The crawler (12) walking mechanism is driven by the emulsion motor (14) and moves under the base (11).

3. The crawler-type emulsion lifting platform for coal mining working face in underground coal mine according to claim 1 is characterized in that: It also includes a booster pump (4), which is arranged on the top platform of the lifting frame (31), the booster pump (4) has a fluid inlet connected to a hydraulic interface for the booster pump on the second hydraulic integrated block (22), and the booster pump (4) has a high-pressure fluid outlet provided with a pressure gauge, which is connected to a portable hydraulic machine with a required ultra-high pressure.

4. The crawler-type emulsion lifting platform for coal mining working face in underground coal mine according to claim 1, characterized in that: The handheld emulsion tools include handheld emulsion wrenches, handheld emulsion drills, handheld emulsion saws, portable emulsion tensioning equipment, water cutting equipment, and the like.

5. The crawler-type emulsion lifting platform for coal mining working face in underground coal mine according to claim 4 is characterized in that: An intelligent recorder is arranged at the portable emulsion tensioning device, and the intelligent recorder records the tensioning position and the tensioning force.

6. The crawler-type emulsion lifting platform for coal mining working face in underground coal mine according to claim 1, characterized in that: The first hydraulic integrated block (21) is integrated with a ball valve, a high-pressure filter, a relief valve, a pressure gauge, a pressure reducing valve and a multi-way reversing valve; the second hydraulic integrated block (22) is integrated with a ball valve, a pressure reducing valve, a multi-way reversing valve and a pressure gauge.

7. The crawler-type emulsion lifting platform for coal mining working face in underground coal mines according to claim 6 is characterized in that: The overflow valve of the first hydraulic integrated block (21) can adjust the pressure in the first hydraulic integrated block (21).

8. The crawler-type emulsion lifting platform for coal mining working face in underground coal mine according to claim 6, characterized in that: The second hydraulic integrated block (22) is arranged in the carrying basket (33), and its liquid inlet is connected to the liquid outlet of the first hydraulic integrated block (21). The second hydraulic integrated block (22) is connected to the platform lifting hydraulic cylinder (32), and the second hydraulic integrated block (22) is provided with a hydraulic interface for a handheld emulsion tool and a hydraulic interface for a booster pump.

Images