Anti-swing control device, system and method for tower body of tower crane

Abstract

The invention discloses an anti-swing control device, system and method for a tower body of a tower crane in the technical field of tower cranes, and aims to solve the problem that the tower body of the tower crane is not fixed under a field wind power hoisting working condition in the prior art, so that the tower body is easy to swing. The tensioning device comprises a tower body of the tower crane and a plurality of tensioning oil cylinders, the tensioning oil cylinders are evenly arranged on the periphery of the tower body of the tower crane, and the output ends of the tensioning oil cylinders are fixedly connected with the tower body of the tower crane through connecting ropes; by controlling the work of the plurality of tensioning oil cylinders, the connecting rope is driven to move, the tower body of the tower crane is tensioned and anchored from different directions, the stability of the tower body of the tower crane is ensured, the problems of damage and deformation of structural parts of the tower crane caused by local overlarge stress of the tower body of the tower crane are prevented, safety accidents are avoided, and the safety of the tower crane is ensured. The safety and the service life of the tower crane are obviously improved.

Description

Technical Field

[0001] This invention relates to a tower crane anti-sway control device, system, and method, belonging to the technical field of tower cranes. Background Technology

[0002] Tower cranes are rotating cranes with a jib mounted on a tall tower. They have a large working range and are mainly used for the vertical transport of materials and the installation of components in the construction of multi-story and high-rise buildings. They consist of three parts: a metal structure, a working mechanism, and an electrical system. Currently, during the lifting process of conventional tower cranes, to prevent tower swaying caused by the load being lifted and the crane moving and rotating along the length of the jib, as well as tower swaying caused by external wind forces, the tower crane is usually fixed to an adjacent building using an attachment frame structure. However, for field wind power installations, where there are generally no buildings nearby for tower body fixation, the standard tower sections are usually made larger to prevent tower swaying, but this significantly increases the cost of the tower crane.

[0003] In summary, existing tower cranes lack proper tower body securing for field wind power installations, leading to tower body swaying and affecting the safety of the tower crane during operation. Increasing the standard number of tower crane sections would significantly increase the cost of the tower crane. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a tower crane anti-sway control device, system and method. By controlling the operation of multiple tensioning cylinders, the connecting rope is driven to move, and the tower crane body is tightened and anchored from different directions, ensuring the stability of the tower crane body, preventing damage and deformation of tower crane structural components caused by excessive local stress, avoiding safety accidents, and significantly improving the safety and lifespan of the tower crane.

[0005] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution: In a first aspect, the present invention provides a tower crane anti-sway control device, comprising a tower crane body and a plurality of tensioning cylinders, wherein the plurality of tensioning cylinders are evenly arranged around the tower crane body, and the output end of the tensioning cylinders is fixedly connected to the tower crane body via a connecting rope.

[0006] In a second aspect, the present invention provides a tower crane anti-sway control system, based on the tower crane anti-sway control device described in the first aspect, comprising a hydraulic pump, a motor, a load-sensitive multi-way valve and an oil tank, wherein the motor is used to drive the hydraulic pump to work, the oil inlet of the hydraulic pump is connected to the oil tank, and the oil outlet of the hydraulic pump is connected to the load-sensitive multi-way valve. The load-sensitive multi-way valve includes an oil supply link and multiple working links. The oil supply link's inlet is connected to the hydraulic pump's outlet, and the oil supply link's outlet is connected to the oil tank. Each of the multiple working links is connected to both the oil supply link's inlet and outlet, and each of the multiple working links is connected to multiple tensioning cylinders via a bidirectional hydraulic lock.

[0007] Furthermore, the first oil outlet of the working link is connected to the first oil inlet of the bidirectional hydraulic lock, the second oil outlet of the working link is connected to the second oil inlet of the bidirectional hydraulic lock, the first oil outlet of the bidirectional hydraulic lock is connected to the first rod chamber of the tensioning cylinder, and the second oil outlet of the bidirectional hydraulic lock is connected to the second rod chamber of the tensioning cylinder.

[0008] Furthermore, the second oil outlet of the bidirectional hydraulic lock is connected to the oil inlet of the safety valve, and the oil outlet of the safety valve is connected to the oil tank.

[0009] Furthermore, the second oil outlet of the bidirectional hydraulic lock is connected to the second pressure sensor.

[0010] Furthermore, the working link includes a reversing valve, a pressure compensation valve, and an electro-proportional relief valve. The oil inlet of the pressure compensation valve is connected to the oil inlet of the oil supply link. The oil outlet of the electro-proportional relief valve is connected to the load feedback oil circuit, which is connected to the oil tank. The first oil outlet of the working link, the second oil outlet of the working link, the first oil outlet of the pressure compensation valve, the second oil outlet of the pressure compensation valve, the oil inlet of the electro-proportional relief valve, and the oil outlet of the oil supply link are all connected to the reversing valve.

[0011] Furthermore, the oil supply unit also includes a first pressure sensor, which is connected to the oil inlet of the oil supply unit.

[0012] Furthermore, the oil tank is equipped with an air filter and a level gauge.

[0013] Thirdly, the present invention provides a tower crane anti-sway control method, based on the tower crane anti-sway control system described in the second aspect, including tension control and pressure holding control; The tension control includes: The tilt angle of the tower crane tower body is acquired in real time; Based on the tilt angle of the tower crane body, the reversing valves in each of the working links are controlled, thereby controlling the extension and retraction of the tensioning cylinder to achieve tensioning and anchoring of the tower crane body. Based on the tilt angle of the tower crane, the expected current of the electro-proportional relief valve in each working link is calculated. Based on the expected current of the electro-proportional relief valve in each working link, the electro-proportional relief valve in each working link is controlled to achieve stepless adjustment of the recovery pressure of each working link.

[0014] Furthermore, the pressure holding control includes: The current pressure of the second rod chamber of each tensioning cylinder is acquired in real time, and the pressure change value is calculated based on the current pressure of the second rod chamber of the tensioning cylinder and the preset pressure of the second rod chamber of the tensioning cylinder. If the pressure change value is greater than the preset value, the directional valve in the working link corresponding to the tensioning cylinder is controlled until the pressure change value is no greater than the preset value, thereby realizing automatic compensation of the pressure in the second rod chamber of the tensioning cylinder.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: 1. The tower crane anti-sway control device controls the operation of multiple tensioning cylinders, thereby driving the connecting rope to move and tighten and anchor the tower crane body from different directions. This ensures the stability of the tower crane body, prevents damage and deformation of the tower crane structural components caused by excessive local stress, avoids safety accidents, and significantly improves the safety and lifespan of the tower crane. 2. The tower crane anti-sway control system can control the extension and retraction of a single or multiple tensioning cylinders according to actual working needs, thereby achieving tensioning and anchoring of the tower crane body. It can also achieve stepless adjustment and pressure relief of the tensioning cylinder recovery pressure, ensuring the stability of the tensioning cylinder during operation. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a tower crane anti-sway control device according to an embodiment of the present invention; Figure 2 This is a connection diagram of a tower crane anti-sway control system according to an embodiment of the present invention; Figure 3 This is a connection diagram of a load-sensitive multi-way valve provided according to an embodiment of the present invention.

[0017] In the diagram: 1. Hydraulic pump; 2. Motor; 3. Air filter; 4. Level gauge; 5. Load-sensitive multi-way valve; 51. Oil supply link; 52. Working link; 6. First pressure sensor; 7. Two-way hydraulic lock; 8. Safety valve; 9. Second pressure sensor; 10. Tensioning cylinder; 11. Pressure compensation valve; 12. Electro-proportional relief valve; 13. Tower crane body; 14. Directional control valve. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1:

[0021] like Figure 1 As shown, the present invention provides a tower crane anti-sway control system, including a tower crane body 13 and a plurality of tensioning cylinders 10. The plurality of tensioning cylinders 10 are evenly arranged around the tower crane body 13, and the output end of the tensioning cylinder 10 is fixedly connected to the tower crane body 13 through a connecting rope.

[0022] Specifically, during operation, this invention controls the operation of multiple tensioning cylinders 10, thereby driving the connecting rope to move and tighten and anchor the tower crane body 13 from different directions. This ensures the stability of the tower crane body 13, prevents damage and deformation of the tower crane structural components caused by excessive local stress due to the tower crane body 13, avoids safety accidents, and significantly improves the safety and lifespan of the tower crane. At the same time, the structure and installation of this application are simple, reducing the cost of the tower crane. Optionally, the number of tensioning cylinders 10 is four. Example 2:

[0023] like Figure 2 and Figure 3 As shown, the present invention provides a tower crane anti-sway control system based on the tower crane anti-sway control device described in Embodiment 1. It includes a hydraulic pump 1, a motor 2, a load-sensitive multi-way valve 5, and an oil tank. The motor 2 drives the hydraulic pump 1. The inlet of the hydraulic pump 1 is connected to the oil tank, and the outlet of the hydraulic pump 1 is connected to the load-sensitive multi-way valve 5. The load-sensitive multi-way valve 5 includes an oil supply link 51 and multiple working links 52. The inlet of the oil supply link 51 is connected to the outlet of the hydraulic pump 1, and the outlet of the oil supply link 51 is connected to the oil tank. Each of the multiple working links 52 is connected to the inlet (P port) and outlet (R port) of the oil supply link 51. Each of the multiple working links 52 is connected to multiple tensioning cylinders 10 via bidirectional hydraulic locks 7.

[0024] Specifically, when controlling the tensioning cylinder 10, the present invention uses a motor 2 to drive a hydraulic pump 1, which draws oil from the oil tank and delivers it to the inlet of the sensitive load multi-way valve 5. The sensitive load multi-way valve 5 is adjusted according to actual working requirements to control the state of each working link 52, thereby controlling the working state of the tensioning cylinder 10 corresponding to the working link 52 and achieving tensioning and anchoring of the tower crane body 13. When it is not necessary to adjust the tensioning cylinder 10, the working state of the bidirectional hydraulic lock 7 is adjusted to close the oil port of the tensioning cylinder 10 and maintain the pressure of the tensioning cylinder 10. Optionally, the load-sensitive multi-way valve 5 is an electrically controlled four-way load-sensitive multi-way valve.

[0025] In this embodiment, the first oil outlet of the working link 52 is connected to the first oil inlet of the bidirectional hydraulic lock 7, the second oil outlet of the working link 52 is connected to the second oil inlet of the bidirectional hydraulic lock 7, the first oil outlet of the bidirectional hydraulic lock 7 is connected to the first rod chamber of the tensioning cylinder 10, and the second oil outlet of the bidirectional hydraulic lock 7 is connected to the second rod chamber of the tensioning cylinder 10. Specifically, when the tensioning cylinder 10 does not need to be adjusted, the first oil outlet of the working link 52 is disconnected from the first rod chamber of the tensioning cylinder 10, and the second oil outlet of the working link 52 is disconnected from the second rod chamber of the tensioning cylinder 10.

[0026] In this embodiment, the second oil outlet of the bidirectional hydraulic lock 7 is connected to the oil inlet of the safety valve 8, and the oil outlet of the safety valve 8 is connected to the oil tank; the second oil outlet of the bidirectional hydraulic lock 7 is connected to the second pressure sensor 9.

[0027] Specifically, the safety valve 8 is used to ensure that the working pressure of the second rod chamber of the tensioning cylinder 10 does not exceed the limit when the tensioning cylinder 10 retracts and tightens the connecting rope, preventing the connecting rope from being pulled too tight, which could lead to the connecting rope breaking or the tensioning cylinder 10 outputting excessive tension, causing structural deformation and damage to the tower body, thus ensuring the safety of the invention; the second pressure sensor 9 is used to monitor the pressure of the second rod chamber of the tensioning cylinder 10 in real time, which facilitates the monitoring of the real-time working status of the tensioning cylinder 10.

[0028] In this embodiment, the working link 52 includes a reversing valve 14, a pressure compensation valve 11, and an electro-proportional relief valve 12. The oil inlet of the pressure compensation valve 11 is connected to the oil inlet of the oil supply link 51. The oil outlet of the electro-proportional relief valve 12 is connected to the load feedback oil circuit, which is connected to the oil tank. The first oil outlet, the second oil outlet of the working link 52, the first oil outlet of the pressure compensation valve 11, the second oil outlet of the pressure compensation valve 11, the oil inlet of the electro-proportional relief valve 12, and the oil outlet of the oil supply link 51 are all connected to the reversing valve 14.

[0029] Optionally, the reversing valve 14 is a proportional reversing valve; the flow rates of the first and second oil outlets of each working link 52 correspond only to the input current of the proportional electromagnet of the reversing valve 14, and are in a basically linear proportional relationship; the expression for the pressure of the second oil outlet of each working link 52 is as follows: P(B)=P(Lsb)+ΔP, where P(B) is the pressure of the second oil outlet of the working link 52, B is the pressure of the second oil outlet of the working link 52, P(Lsb) is the pressure of the load feedback oil circuit, and ΔP is the spring setting value of the pressure compensation valve 11.

[0030] Optionally, there are four working links 52, numbered from left to right as the first link, second link, third link, and fourth link. A1, A2, A3, and A4 are the first oil outlets of the first, second, third, and fourth links, respectively; B1, B2, B3, and B4 are the second oil outlets of the first, second, third, and fourth links, respectively; B includes B1, B2, B3, and B4. Let Y1a and Y1b be the proportional electromagnets corresponding to the directional valve 14 in the first link, Y2a and Y2b be the proportional electromagnets corresponding to the directional valve 14 in the second link, Y3a and Y3b be the proportional electromagnets corresponding to the directional valve 14 in the third link, and Y4a and Y4b be the proportional electromagnets corresponding to the directional valve 14 in the fourth link; Y5, Y6, Y7... Y8 represents the electro-proportional relief valve 12 in the first, second, third, and fourth sections, respectively. During operation, it can realize the synchronous recovery of a single tensioning cylinder 10 or multiple tensioning cylinders 10, and calculate and output the control currents of Y1b, Y2b, Y3b, and Y4b. Since P(B) = P(Lsb) + ΔP, it can realize the rapid or slow recovery of a single or multiple tensioning cylinders 10 according to the speed required by the working conditions, thereby achieving the tensioning and anchoring of the tower crane body 13. In addition, it can calculate and output the control currents of Y5, Y6, Y7, and Y8, thereby realizing the stepless adjustment of the load feedback oil circuit pressure of each working section 52, and thus realizing the stepless adjustment and pressure relief of the recovery pressure of a single tensioning cylinder 10 or multiple tensioning cylinders 10.

[0031] In this embodiment, the oil supply link 51 further includes a first pressure sensor 6, which is connected to the oil inlet of the oil supply link 51; the oil tank is equipped with an air filter 3 and a level gauge 4; the first pressure sensor 6 is used to detect the oil supply pressure of the oil supply link 51, ensuring the stability of the oil supply link 51 during operation; the air filter 3 is used to filter the air in the oil tank; and the level gauge 4 is used to obtain the liquid level in the oil tank in real time.

[0032] According to actual working needs, the present invention can control the extension and retraction of a single tensioning cylinder 10 or multiple tensioning cylinders 10 to achieve tensioning and anchoring of the tower crane body 13, and can realize stepless adjustment and pressure relief of the tensioning cylinder 10 recovery pressure, ensuring the stability of the tensioning cylinder 10 during operation. Example 3:

[0033] This invention provides a tower crane anti-sway control method, based on the tower crane anti-sway control system described in Embodiment 2, including tension control and pressure holding control; The tension control includes: The tilt angle of the tower crane tower body 13 is acquired in real time; Based on the tilt angle of the tower crane body 13, the reversing valves 14 in each of the working links 52 are controlled, thereby controlling the extension and retraction of the tensioning cylinder 10 to achieve tensioning and anchoring of the tower crane body 13. Based on the tilt angle of the tower crane tower body 13, the expected current of the electro-proportional relief valve 12 in each of the working links 52 is calculated. Based on the expected current of the electro-proportional relief valve 12 in each of the working links 52, the electro-proportional relief valve 12 in each of the working links 52 is controlled to achieve stepless adjustment of the recovery pressure of each of the working links 52.

[0034] Specifically, when the tower crane body 13 sways, the differential GPS detects the tilt angle of the tower crane body 13 in different directions in real time, and transmits the corresponding control signal (tilt angle) to the local electrical control system through the communication network. The local electrical control system, based on control signals, can retract one, two, three, or four tensioning cylinders 10 simultaneously, either individually or synchronously. It also automatically calculates and outputs the control currents for Y1b, Y2b, Y3b, and Y4b, thereby enabling one or more tensioning cylinders 10 to retract quickly or slowly according to the required speed, achieving tensioning and anchoring of the tower crane body 13. Furthermore, the local electrical control system automatically calculates and outputs the control currents for Y5, Y6, Y7, and Y8 based on the overall machine control signals, thereby achieving stepless adjustment of the load feedback oil circuit pressure of each working link 52, and thus stepless adjustment and pressure relief of the retraction pressure of one or more tensioning cylinders 10. Specifically, when controlling the control currents for Y1b, Y2b, Y3b, and Y4b, the displacement of the valve core of the reversing valve 14 can be controlled, thereby adjusting the flow area of ​​the valve core and achieving tensioning. The hydraulic cylinder 10 can be retracted quickly or slowly. During operation, the pressure compensation valve 11 ensures that the pressure difference across the valve core of the directional valve 14 remains constant regardless of whether it is output to port A or port B of the working link 52. This ensures that the flow rate of the directional valve 14 is only related to the flow area of ​​its valve core, thereby adjusting the retraction speed of the tensioning cylinder 10. When the retraction pressure of the tensioning cylinder 10 needs to be controlled, the directional valve 14 is at the upper end. The inlet of the electro-proportional relief valve 12 can be connected to the second outlet of the pressure compensation valve 11 through the directional valve 14. When controlling the control currents of Y5, Y6, Y7, and Y8, their outlet pressures can be adjusted. Combined with the connection between the electro-proportional relief valve 12 and the load feedback oil circuit, the pressure of the load feedback oil circuit can be adjusted. Furthermore, by combining P(B) = P(Lsb) + ΔP, stepless adjustment and pressure relief of the retraction pressure of the tensioning cylinder 10 can be achieved.

[0035] During the process of controlling the recovery pressure of the tensioning cylinder 10 according to the target value, the local electrical control system realizes closed-loop precision control of the pressure through pressure feedforward + PID control algorithm based on the real-time feedback value of the second pressure sensor 9. When the target control pressure is reached, the valve core of the directional valve 14 of the corresponding working link 52 is controlled to return to the neutral position, and the bidirectional hydraulic lock 7 closes the inlet and outlet oil circuits of the tensioning cylinder 10 to achieve pressure maintenance of the tensioning cylinder 10.

[0036] In this embodiment, the pressure holding control includes: The current pressure of the second rod chamber of each tensioning cylinder 10 is acquired in real time, and the pressure change value is calculated based on the current pressure of the second rod chamber of the tensioning cylinder 10 and the preset pressure of the second rod chamber of the tensioning cylinder 10. If the pressure change value is greater than the preset value, the directional valve 14 in the working link 52 corresponding to the tensioning cylinder 10 is controlled until the pressure change value is not greater than the preset value, thereby realizing automatic compensation of the pressure in the second rod chamber of the tensioning cylinder 10.

[0037] Specifically, during the long-term pressure holding process, if the pressure change exceeds the preset value (optionally, the preset value is 1MPa), the local electrical control system automatically controls the corresponding working link 52 to operate. Oil is discharged from the second oil outlet of the corresponding working link 52 and injected into the second rod chamber of the corresponding tensioning cylinder 10. With the real-time feedback value of the second pressure sensor 9, pressure compensation is automatically achieved. That is, when the pressure in the second rod chamber reaches the target value, the valve core of the reversing valve 14 of the corresponding working link 52 is controlled to return to the neutral position to avoid insufficient pressure of the corresponding connecting rope. During the tensioning and anchoring process of the tower crane tower body 13, the above working cycle is repeated.

[0038] Through the above control, the four corners of the tower body 13 of the tower crane, which is unattached and has a high fixed frame, can be tightened and anchored to prevent swaying during heavy-load hoisting operations. This prevents damage and deformation of the tower crane structural components caused by excessive local stress due to the swaying of the tower body 13, avoids safety accidents, and significantly improves the reliability and service life of the tower crane.

[0039] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A tower crane tower anti-sway control device, characterized in that, The crane tower (13) and a plurality of tensioning oil cylinders (10) are included, the plurality of tensioning oil cylinders (10) are uniformly arranged around the crane tower (13), and output ends of the tensioning oil cylinders (10) are fixedly connected with the crane tower (13) through connecting ropes.

2. A tower body anti-swing control system based on the tower body anti-swing control device of claim 1, characterized in that, The hydraulic pump (1), the motor (2), the load-sensitive multi-way valve (5) and the oil tank are included, the motor (2) is used for driving the hydraulic pump (1) to work, an oil inlet of the hydraulic pump (1) is connected with the oil tank, and an oil outlet of the hydraulic pump (1) is connected with the load-sensitive multi-way valve (5); The load-sensitive multi-way valve (5) includes an oil supply joint (51) and a plurality of working joints (52), an oil inlet of the oil supply joint (51) is connected with the oil outlet of the hydraulic pump (1), an oil outlet of the oil supply joint (51) is connected with the oil tank, the plurality of working joints (52) are connected with the oil inlets and the oil outlet of the oil supply joint (51), and the plurality of working joints (52) are respectively connected with the plurality of tensioning oil cylinders (10) through the bidirectional hydraulic lock (7).

3. The anti-swing control system of the tower of the tower crane according to claim 2, characterized in that, A first oil outlet of the working joint (52) is connected with a first oil inlet of the bidirectional hydraulic lock (7), a second oil outlet of the working joint (52) is connected with a second oil inlet of the bidirectional hydraulic lock (7), a first oil outlet of the bidirectional hydraulic lock (7) is connected with a first rod cavity of the tensioning oil cylinder (10), and a second oil outlet of the bidirectional hydraulic lock (7) is connected with a second rod cavity of the tensioning oil cylinder (10).

4. The anti-swing control system of the tower of the tower crane according to claim 3, characterized in that, The second oil outlet of the bidirectional hydraulic lock (7) is connected with an oil inlet of the safety valve (8), and an oil outlet of the safety valve (8) is connected with the oil tank.

5. The anti-swing control system of the tower of the tower crane according to claim 4, characterized in that, The second oil outlet of the bidirectional hydraulic lock (7) is connected with the second pressure sensor (9).

6. The anti-swing control system of the tower of the tower crane according to claim 5, characterized in that, The working joint (52) includes the reversing valve (14), the pressure compensation valve (11) and the electric proportional overflow valve (12), an oil inlet of the pressure compensation valve (11) is connected with the oil inlet of the oil supply joint (51), an oil outlet of the electric proportional overflow valve (12) is connected with a load feedback oil circuit, the load feedback oil circuit is connected with the oil tank, the first oil outlet of the working joint (52), the second oil outlet of the working joint (52), a first oil outlet of the pressure compensation valve (11), a second oil outlet of the pressure compensation valve (11), an oil inlet of the electric proportional overflow valve (12) and an oil outlet of the oil supply joint (51) are connected with the reversing valve (14).

7. The anti-swing control system of the tower of the tower crane according to claim 2, characterized in that, The oil supply joint (51) further includes the first pressure sensor (6), and the first pressure sensor (6) is connected with the oil inlet of the oil supply joint (51).

8. The anti-swing control system of the tower of the tower crane according to claim 2, characterized in that, The air filter (3) and the liquid level gauge (4) are arranged in the oil tank.

9. A tower body anti-swing control method based on the tower body anti-swing control system of claim 6, characterized in that, The tensioning control and the pressure maintaining control are included. The tensioning control includes: The inclination angle of the crane tower (13) is acquired in real time. According to the inclination angle of the crane tower (13), the reversing valve (14) in each working joint (52) is controlled, the extension and retraction of the tensioning oil cylinder (10) are controlled, the tensioning and anchoring of the crane tower (13) are realized, and the crane tower (13) is kept stable. According to the inclination angle of the tower crane tower (13), the expected current of the electric proportional overflow valve (12) in each working joint (52) is calculated, and according to the expected current of the electric proportional overflow valve (12) in each working joint (52), the electric proportional overflow valve (12) in each working joint (52) is controlled, and stepless adjustment of the recovery pressure of each working joint (52) is realized.

10. The tower swing-prevention control method of claim 9, wherein, The pressure maintaining control comprises: Real-time acquisition of the current pressure of the second rod cavity of each tensioning oil cylinder (10), calculation of the pressure change value according to the current pressure of the second rod cavity of the tensioning oil cylinder (10) and the preset pressure of the second rod cavity of the tensioning oil cylinder (10); If the pressure change value is greater than the preset value, the reversing valve (14) in the working joint (52) corresponding to the tensioning oil cylinder (10) is controlled until the pressure change value is not greater than the preset value, and the automatic compensation of the second rod cavity pressure of the tensioning oil cylinder (10) is realized.

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