Multi-power-head pressurizing mixing pile machine, multi-power-head pressurizing hydraulic system and control method

Abstract

The invention provides a multi-power-head pressurizing mixing pile machine, a multi-power-head pressurizing hydraulic system and a control method. The mixing pile machine comprises a pressurizing winch arranged on a machine body platform; the stand column assembly for stirring construction comprises a stand column and at least two stirring power heads, a first pressurizing pulley block and a second pressurizing pulley block are arranged at the top of the stirring power; the turning pulley block is arranged on the machine body platform; the fixed pulley block is arranged on the side of the machine body platform; one end of the first steel wire rope is fixed on the pressurizing winch, and the other end of the first steel wire rope is wound around the turning pulley block, then wound around the first pressurizing pulley block of one stirring power head, then wound around the second pressurizing pulley block and then downwards wound around the fixed pulley block; the first steel wire rope extends upwards from the fixed pulley block, bypasses the first pressurizing pulley block of the other stirring power head, then bypasses the second pressurizing pulley block of the stirring power head, and is downwards fixed with the machine body platform; according to the invention, one set of pressurizing winch can pressurize a plurality of power heads.

Description

Technical Field

[0001] The present invention relates to the technical field of pile-driving machinery, and in particular to a multi-power-head pressurized mixing pile driver, a multi-power-head pressurized hydraulic system and a control method. Background Art

[0002] The pressurization of the existing multi-power head pile frame adopts a set of pressurization winches to control a set of power heads. If there are multiple sets of power heads, multiple sets of pressurization winches are required to control. Therefore, the existing equipment has the disadvantages of multiple sets of pressurization winches occupying a large area, complicated control and operation, and high cost.

[0003] Therefore, there is an urgent need for a multi-power head pressurized pile mixing machine, a multi-power head pressurized hydraulic system and a control method, so that a set of pressurized winches can pressurize multiple power heads. Summary of the invention

[0004] The purpose of the present invention is to provide a multi-power head pressurized mixing pile driver, a multi-power head pressurized hydraulic system and a control method, aiming to solve the technical problems that in the traditional multi-power head pile frame, each power head must be equipped with a pressurized winch, resulting in a large footprint and complex structure and operation.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a multi-power head pressurized pile mixing machine, comprising:

[0006] Pressurized winch, installed on the fuselage platform;

[0007] A column assembly, arranged on the fuselage platform, is used for mixing construction, and comprises a column and at least two mixing power heads slidably arranged on the column;

[0008] A first pressurizing pulley block is disposed on one side of the top of the stirring power and a second pressurizing pulley block is disposed on the other side thereof;

[0009] A direction-changing pulley block is arranged on the fuselage platform and adjacent to the column;

[0010] A fixed pulley block is arranged on the side of the fuselage platform and adjacent to the column;

[0011] A first steel wire rope has one end fixed on the pressurizing winch and operably wound on the pressurizing winch, and the other end extends out of the pressurizing winch and passes through the changing pulley block, then passes around the first pressurizing pulley block of one of the stirring power heads, then passes around its second pressurizing pulley block, and then passes around the fixed pulley block downward. Then, the first steel wire rope extends upward from the fixed pulley block, passes around the first pressurizing pulley block of another stirring power head, then passes around its second pressurizing pulley block, and then extends downward and is fixed to the fuselage platform.

[0012] As a further improvement of the above scheme, the multi-power head pressurized mixing pile driver also includes power head winches matching the number of the mixing power heads, and the power head winches are arranged at intervals on the fuselage platform; the corresponding mixing power heads are driven up and down by second steel wire ropes respectively.

[0013] As a further improvement of the above solution, the multi-power head pressurized pile mixing driver also includes a supporting diagonal rod, one end of which is hinged to the fuselage platform, and the other end of which is hinged to the column.

[0014] In a second aspect, the present invention further provides a multi-power head pressurized hydraulic system of the above-mentioned multi-power head pressurized pile mixing machine, comprising a plunger pump, a multi-electric proportional multi-way valve connected to the plunger pump, and a pressurization control module and at least two power head winch control modules connected to the multi-electric proportional multi-way valve;

[0015] The multi-connected electric proportional multi-way valve includes a pressurized reversing valve and at least two power head reversing valves matched with the power head hoisting control module; the pressurized reversing valve includes a pressurized reversing valve body and a first proportional electromagnet and a second proportional electromagnet respectively arranged at both ends thereof, and the pressurized reversing valve body is driven to reverse by controlling the gain and loss of electricity of the corresponding proportional electromagnets to realize the forward or reverse rotation of the pressurized control module;

[0016] The power head reversing valve comprises a power head reversing valve body and a third proportional electromagnet and a fourth proportional electromagnet respectively arranged at two ends thereof, and the power head reversing valve is driven to reverse the power head winch control module by controlling the gain and loss of electricity of the corresponding proportional electromagnets.

[0017] The pressurization control module includes a pressurization winch hydraulic motor and a floating solenoid valve arranged in parallel with the pressurization winch hydraulic motor, and the floating solenoid valve is used to control the connection or disconnection of two working oil ports of the pressurization winch hydraulic motor.

[0018] As a further improvement of the above solution, the multi-connected electric proportional multi-way valve also includes an electric proportional overflow valve for adjusting the pressurization pressure of the pressurized winch.

[0019] In a third aspect, the present invention further provides a control method for the above-mentioned multi-power head pressurized pile mixing machine, including a multi-power head pressurized hydraulic system of the multi-power head pressurized pile mixing machine provided in the second aspect, and the steps include:

[0020] S1: When any power head winch needs to lift the stirring power head, the fourth proportional solenoid on the multi-way electric proportional valve is energized, the floating solenoid valve of the pressurization control module is energized, the two working oil ports of the pressurization winch hydraulic motor are connected, and the pressurization winch follows the lifting action of any power head winch to release the rope;

[0021] S2: When any power head winch needs to lower the mixing power head, the third proportional solenoid on the multi-way electric proportional valve is energized, and the first proportional solenoid is energized, and the pressurizing winch follows the lowering action of any power head winch to collect the rope and pressurize;

[0022] During the pressurization process, when the pressure on any stirring power head is less than the first pressurization preset value, the electric proportional relief valve is controlled to be energized and its initial pressure value is set to AMPa, pressure continues to be applied to the stirring power head, and the pressure value of the electric proportional relief valve is gradually adjusted until the pressure on the stirring power head is greater than the first pressurization preset value and less than the second pressurization preset value.

[0023] As a further improvement of the above scheme, in step S2, when gradually adjusting the pressure value of the electric proportional relief valve, if the pressure on the stirring power head is less than the first pressurization preset value at the initial pressure value AMPa, BMPa is increased on the basis of the initial pressure value AMPa, and it is determined whether the pressure on the stirring power head is greater than the first pressurization preset value.

[0024] If it is greater than the first pressurization preset value, the electric proportional relief valve maintains the current set pressure value.

[0025] If it is still less than the first pressurization preset value, adjust the set pressure value of the electric proportional relief valve to (A+nB) MPa, where n is a non-zero positive integer greater than 1, until the pressure on the stirring power head is greater than the first pressurization preset value.

[0026] As a further improvement of the above scheme, when gradually adjusting the pressure value of the electric proportional relief valve, if the pressure on the stirring power head is greater than the second pressurization preset value, the set pressure value of the electric proportional relief valve is adjusted to (A+(n-1)B) MPa.

[0027] As a further improvement of the above solution, the control method further includes step S0:

[0028] S0: When all the power head winches are not in action, the pressurizing winch is controlled separately, the first proportional electromagnet is controlled to be energized, the pressurizing winch stores the first steel wire rope, and the second proportional electromagnet is controlled to be energized, the pressurizing winch releases the first steel wire rope.

[0029] Since the present invention adopts the above technical solution, the beneficial effects of this application are:

[0030] 1. The present invention provides a multi-power head pressurized mixing pile machine, by arranging a changing pulley block and a fixed pulley block on the machine body platform, only one pressurized winch is required, and the first steel wire rope extended from the pressurized winch is wound around the changing pulley block, then bypasses the first pressurized pulley block of one of the mixing power heads, and then bypasses the second pressurized pulley block and then bypasses the fixed pulley block downward, and then the first steel wire rope extends upward from the fixed pulley block and bypasses the first pressurized pulley block of the next mixing power head, and then bypasses the second pressurized pulley block and then extends downward and is fixed to the machine body platform. With such an arrangement, only one pressurized winch is required to pressurize multiple mixing power heads, and there is no need to configure a pressurized winch for each mixing power head, which not only saves space on the machine body platform, but also reduces equipment cost; at the same time, the whole structure is simple and easy to install and operate.

[0031] 2. The present invention also provides a control method for a multi-power head pressurized mixing pile driver. When any power head winch needs to lift the mixing power head, the fourth proportional electromagnet on the multi-electric proportional multi-way valve is controlled to be energized, the floating solenoid valve of the pressurization control module is controlled to be energized, the two working oil ports of the pressurization winch hydraulic motor are connected, and the pressurization winch follows the lifting action of any power head winch to perform the rope-out action; when any power head winch needs to lower the mixing power head, the third proportional electromagnet on the multi-electric proportional multi-way valve is controlled to be energized, the first proportional electromagnet is controlled to be energized, and the pressurization winch follows the lowering action of any power head winch to perform the rope-collecting and pressurizing action. At the same time, during the pressurization process, by adjusting the control The pressurization pressure is controlled by the set pressure value of the power-controlled proportional relief valve; such a setting can effectively realize the function of a set of pressurized winches driving multiple mixing power heads, and the operation and control are simple and the construction efficiency is high; at the same time, since a floating solenoid valve is also provided on the pressurization control module, when any power head winch lifts the mixing power head, the floating solenoid valve is controlled to be energized, and the two working oil ports of the pressurized winch hydraulic motor are connected, so that the pressurized winch follows the lifting of the power head winch to perform the rope-out action when any power head winch is lifted. On the basis of realizing one-to-many, it will not affect the lifting operation of each power head winch, and there is no need for complicated switching operations. It only needs to control the floating solenoid valve to gain and lose power. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0033] Figure 1A schematic front view of a multi-power head pressurized pile mixing machine provided by the present invention;

[0034] Figure 2 A schematic side view of a multi-power head pressurized pile mixing machine provided by the present invention;

[0035] Figure 3 A schematic diagram of the winding of the first steel wire rope of a multi-power head pressurized pile mixing machine provided by the present invention;

[0036] Figure 4 A schematic diagram of the principle of a multi-power head pressurized hydraulic system of a multi-power head pressurized pile mixing machine provided by the present invention;

[0037] Figure 5 A schematic flow chart of a multi-power head pressurization control method provided by the present invention;

[0038] Reference numerals:

[0039] 1. Pressurized winch; 2. Fuselage platform; 3. Column assembly; 4. Mixing power head; 41. First pressurized pulley block; 42. Second pressurized pulley block; 5. Direction-changing pulley block; 6. Fixed pulley block; 7. First steel wire rope; 8. Power head winch; 81. Second steel wire rope; 9. Support diagonal rod; 10. Goose head;

[0040] 01. Piston pump; 02. Multi-connected electric proportional multi-way valve; 021. Pressurization reversing valve; 022. Power head reversing valve; 023. Pressurization reversing valve body; 024. First proportional solenoid; 025. Second proportional solenoid; 026. Power head reversing valve body; 027. Third proportional solenoid; 028. Fourth proportional solenoid; 03. Pressurization control module; 031. Pressurization winch hydraulic motor; 032. Floating solenoid valve; 04. Power head winch control module; 05. Electric proportional overflow valve.

[0041] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0045] Furthermore, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] Example 1

[0047] See also Figure 1-Figure 3 The present invention provides a multi-power head pressurized mixing pile machine, comprising:

[0048] A pressurized winch 1 is arranged on the fuselage platform 2;

[0049] The column assembly 3 is arranged on the fuselage platform 2 and is used for mixing construction. It includes a column and at least two mixing power heads 4 that can be slidably arranged on the column. In this embodiment, refer to Figure 1 As shown in the figure, two stirring power heads 4 are provided, and each stirring power head 4 is respectively provided with a power head winch 8, and the power head winch 8 is arranged on the fuselage platform 2 at intervals, and drives the corresponding stirring power head 4 to move up and down through the pulley arranged on the goose head 10 through the second steel wire rope 81;

[0050] The top side of the stirring power is provided with a first pressurizing pulley set 41 and a second pressurizing pulley set 42 arranged on the other side thereof;

[0051] A direction-changing pulley block 5 is arranged on the fuselage platform 2 and adjacent to the column;

[0052] A fixed pulley block 6 is arranged on the side of the fuselage platform 2 and adjacent to the column;

[0053] A first steel wire rope 7, one end of which is fixed on the pressurizing winch 1 and can be operably wound on the pressurizing winch 1, and the other end of which extends out of the pressurizing winch 1 and passes through the direction-changing pulley block 5, then passes through the first pressurizing pulley block 41 of one of the stirring power heads 4, passes through its second pressurizing pulley block 42, and then passes through the fixed pulley block 6 downward, and then the first steel wire rope 7 extends upward from the fixed pulley block 6, passes through the first pressurizing pulley block 41 of another stirring power head 4, passes through its second pressurizing pulley block 42, and then extends downward and is fixed to the fuselage platform 2;

[0054] In the present invention, when the mixing power head 4 needs to be connected to the drill rod, it is necessary to first lower the mixing power head 4, and after it is lowered to the first predetermined position and the rod connection is completed, the corresponding power head winch 8 is controlled to drive the mixing power head 4 to rise to the second predetermined position through the second steel wire rope 81, and then the corresponding mixing power head 4 is gradually lowered through the wellhead to perform the mixing operation; when it is necessary to pressurize the mixing power head 4, the pressurization winch 1 is started, and the pressurization winch 1 drives the first steel wire rope 7 to perform the rope-collecting action, and by arranging a change-of-direction pulley block 5 and a fixed pulley block 6 on the fuselage platform 2, the first steel wire rope 7 extending from the pressurization winch 1 is wound around the change-of-direction pulley block 5 and then , then bypass the first pressurizing pulley group 41 of one of the stirring power heads 4, and then bypass the second pressurizing pulley group 42 and then bypass the fixed pulley group 6 downwards, and then the first steel wire rope 7 extends upward from the fixed pulley group 6 and bypasses the first pressurizing pulley group 41 of the next stirring power head 4, and then bypasses the second pressurizing pulley group 42 and extends downwards and is fixed to the fuselage platform 2. With such an arrangement, only one pressurizing winch 1 is needed to pressurize multiple stirring power heads 4, and there is no need to configure a pressurizing winch 1 for each stirring power head 4, which not only saves space on the fuselage platform 2, but also reduces equipment costs; at the same time, the entire structure is simple and easy to install and operate.

[0055] As a preferred embodiment, the multi-power head pressurized pile mixing driver also includes a supporting diagonal rod 9, one end of the supporting diagonal rod 9 is hinged to the fuselage platform 2, and the other end is hinged to the column, and the axis of the supporting diagonal rod 9 is at a preset inclination angle with the plane where the fuselage platform 2 is located; specifically, the supporting diagonal rod 9 includes a supporting rod body and a supporting cylinder connected to the supporting rod body, one end of the supporting rod body is hinged to the column, and the other end of the supporting rod body is connected to the telescopic end of the supporting cylinder, and the telescopic end of the supporting cylinder is hinged to the fuselage platform 2; the setting of the supporting diagonal rod 9 provides stable support for the column, thereby improving the stable support guarantee for the setting of the multi-power head.

[0056] It should be noted that see Figure 2A plurality of stirring power heads 4 are located on different sides of the column, each of the stirring power heads 4 can move vertically up and down on the corresponding side, and each of the stirring power heads 4 is provided with a tension sensor for detecting the pressurized pressure.

[0057] Example 2

[0058] See also Figure 4 The present invention further provides a multi-power head pressurized hydraulic system of a multi-power head pressurized mixing pile driver as described in Example 1, comprising a plunger pump 01, a multi-electric proportional multi-way valve 02 connected to the plunger pump 01, and a pressurization control module 03 and at least two power head winch control modules 04 connected to the multi-electric proportional multi-way valve 02; specifically, each power head winch 8 is respectively provided with a power head winch control module 04. In this embodiment, two power head winch control modules 04 are provided, which are respectively used to control the corresponding mixing power heads 4, and the power head winch control module 04 includes a power head winch 8 hydraulic motor for driving the power head winch 8;

[0059] The multi-connected electric proportional multi-way valve 02 includes a pressurizing reversing valve 021 and at least two power head reversing valves 022 matched with the power head hoisting control module 04; the pressurizing reversing valve 021 includes a pressurizing reversing valve body 023 and a first proportional electromagnet 024 and a second proportional electromagnet 025 respectively arranged at two ends thereof, and the pressurizing reversing valve body 023 is driven to reverse the pressurizing control module 03 by controlling the gain and loss of electricity of the corresponding proportional electromagnets, thereby realizing the control of the retracting and releasing of the first steel wire rope 7 of the pressurizing hoisting 1;

[0060] The power head reversing valve 022 includes a power head reversing valve body 026 and a third proportional electromagnet 027 and a fourth proportional electromagnet 028 respectively arranged at two ends thereof. The power head reversing valve 022 is driven to reverse the power head winch control module 04 by controlling the gain and loss of electricity of the corresponding proportional electromagnets, thereby controlling the retraction and extension of the second steel wire rope 81 of the power head winch 8.

[0061] The pressurization control module 03 includes a pressurization winch hydraulic motor 031 and a floating solenoid valve 032 arranged in parallel with the pressurization winch hydraulic motor 031, and the floating solenoid valve 032 is used to control the connection or disconnection of the two working oil ports of the pressurization winch hydraulic motor 031;

[0062] Specifically, in the present embodiment, the pressurizing reversing valve 021 and the power head reversing valve 022 are both electric proportional multi-way valves; the first proportional electromagnet 024 is energized, the pressurizing reversing valve 021 is in the first working position, and the pressurizing winch hydraulic motor 031 drives the pressurizing winch 1 to receive the first steel wire rope 7 in the forward direction; the second proportional electromagnet 025 is energized, the pressurizing reversing valve 021 is in the second working position, and the pressurizing winch hydraulic motor 031 drives the pressurizing winch 1 to release the first steel wire rope 7 in the reverse direction; the third proportional electromagnet 027 is energized, the power head reversing valve 022 is in the first working position, and the power head winch 8 hydraulic motor drives the power head winch 8 to lower the stirring power head 4; the fourth proportional electromagnet 028 is energized, the power head reversing valve 022 is in the second working position, and the power head winch 8 hydraulic motor drives the power head winch 8 to lift the stirring power head 4;

[0063] The floating solenoid valve 032 is a two-position two-way solenoid valve, and the two oil ports of the floating solenoid valve 032 correspond to and are matched with the two working oil ports of the pressurized hoisting hydraulic motor 031. When the floating solenoid valve 032 is in the first working position, the two oil ports are not connected to each other, so that the two working oil ports of the pressurized hoisting hydraulic motor 031 are connected to the oil ports corresponding to the power head reversing valve 022, so that the plunger pump 01 supplies oil to the pressurized hoisting hydraulic motor 031; when the floating solenoid valve 032 is in the second working position, the two oil ports are connected to each other, so that the two working oil ports of the pressurized hoisting hydraulic motor 031 form a passage through the floating solenoid valve 032, so that the pressurized hoisting hydraulic motor 031 is in a floating state, and a very small pulling force is applied to the first wire rope 7, and the first wire rope 7 can follow the action. At this time, the pressure winch 1 can follow the lifting action of any power head winch 8 to perform rope-out movement, and its speed is consistent with the speed of the stirring power head 4 to ensure that the wire rope will not be tangled.

[0064] As a preferred embodiment, the multi-connected electric proportional multi-way valve 02 also includes an electric proportional overflow valve 05, which is used to adjust the pressurization pressure of the pressurized winch 1; the electric proportional overflow valve 05 is arranged on the return oil line of the pressurization control module 03, and the pressurization pressure of the pressurized winch 1 is regulated by adjusting the overflow pressure of the electric proportional overflow valve 05.

[0065] Example 3

[0066] The present invention also provides a control method for the above-mentioned multi-power head pressurized pile mixing machine, including a multi-power head pressurized hydraulic system of a multi-power head pressurized pile mixing machine as provided in Example 2, wherein the steps include:

[0067] S1: When any power head winch 8 needs to lift the stirring power head 4, the fourth proportional solenoid 028 on the multi-electric proportional multi-way valve 02 is energized, and the floating solenoid valve 032 of the pressurization control module 03 is energized, and the two working oil ports of the pressurization winch hydraulic motor 031 are connected. The pressurization winch hydraulic motor 031 is in a floating state, and a very small pulling force is applied to the first wire rope 7. The first wire rope 7 can follow the lifting action of any power head winch 8 to perform the rope-out action, and its speed is consistent with the speed of the stirring power head 4, ensuring that the wire rope will not be tangled;

[0068] S2: When any power head winch 8 needs to lower the mixing power head 4, the third proportional electromagnet 027 on the multi-electric proportional multi-way valve 02 is controlled to be energized, and the first proportional electromagnet 024 is controlled to be energized, and the pressure winch 1 follows the lowering action of any power head winch 8 to perform the rope retracting and pressurizing action; its speed is consistent with the speed of the mixing power head 4 to ensure that the wire rope will not be tangled; in this way, the mixing power head 4 will obtain the downward pressure from the pressure winch 1, making the power head drilling more efficient, and its pressure can be flexibly adjusted according to the needs of construction parameters;

[0069] During the pressurization process, see Figure 5 When the pressure on any stirring power head 4 is less than the first pressurization preset value, the electric proportional relief valve 05 is controlled to be energized and its initial pressure value is set to AMPa, and the pressure on the stirring power head 4 continues to be applied. The tension sensor on the stirring power head 4 detects the pressurization pressure in real time and compares it with the first pressurization preset value and the second pressurization preset value pre-stored in the controller, and gradually adjusts the pressure value of the electric proportional relief valve 05 based on the comparison result until the pressure on the stirring power head 4 is greater than the first pressurization preset value and less than the second pressurization preset value;

[0070] Specifically, when gradually adjusting the pressure value of the electric proportional relief valve 05, if at the initial pressure value AMPa (preferably, the initial pressurization pressure value of the electric proportional relief valve 05 is preliminarily adjusted to be set at about 5MPa), the pressure on the stirring power head 4 is less than the first pressurization preset value (preferably, the first pressurization preset value is 10T), BMPa is increased on the basis of the initial pressure value AMPa (preferably, the pressure value increased each time is 5MPa), and it is determined whether the pressure on the stirring power head 4 is greater than the first pressurization preset value,

[0071] If it is greater than the first preset pressure value, the electric proportional relief valve 05 maintains the current set pressure value.

[0072] If it is still less than the first preset pressure value, adjust the set pressure value of the electric proportional relief valve 05 to (A+nB)MPa, where n is a non-zero positive integer greater than 1, until the pressure on the stirring power head 4 is greater than the first preset pressure value;

[0073] When gradually adjusting the pressure value of the electric proportional relief valve 05, if the pressure on the stirring power head 4 is greater than the second pressurization preset value (preferably, the second pressurization preset value is 30T), the set pressure value of the electric proportional relief valve 05 is adjusted to (A+(n-1)B) MPa; that is, when the set pressure value of the electric proportional relief valve 05 is adjusted to 15 MPa, if the pressurization pressure on the stirring power head 4 is greater than 30T, the set pressure value of the electric proportional relief valve 05 is adjusted to 10Mpa again;

[0074] In the present invention, the pressurization pressure is controlled by adjusting the set pressure value of the control electric proportional relief valve 05; such a setting can effectively realize the function of a set of pressurization winches 1 driving multiple stirring power heads 4, and the operation and control are simple and the construction efficiency is high; at the same time, since a floating solenoid valve 032 is also provided on the pressurization control module 03, when any power head winch 8 lifts the stirring power head 4, the floating solenoid valve 032 is controlled to be energized, and the two working oil ports of the pressurization winch hydraulic motor 031 are connected, so that the pressurization winch 1 follows the lifting of the power head winch 8 to perform the rope-out action when any power head winch 8 is lifted. On the basis of realizing one belt and multiple belts, it will not affect the lifting operation of each power head winch 8, and there is no need for complicated switching operations. It only needs to control the floating solenoid valve 032 to gain or lose power.

[0075] As a preferred embodiment, the control method further comprises step S0:

[0076] S0: When all the power head winches 8 are not in action, the pressurizing winch 1 is controlled separately, the first proportional electromagnet 024 is controlled to be energized, the pressurizing winch 1 stores the first steel wire rope 7, the second proportional electromagnet 025 is controlled to be energized, and the pressurizing winch 1 releases the first steel wire rope 7; such a setting facilitates the installation, replacement, adjustment and other actions of the first steel wire rope 7 and the pressurizing winch 1.

[0077] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A multi-power head pressurized pile mixing machine, characterized in that: include: Pressurized winch, installed on the fuselage platform; A column assembly, arranged on the fuselage platform, is used for mixing construction, and comprises a column and at least two mixing power heads slidably arranged on the column; A first pressurizing pulley block is disposed on one side of the top of the stirring power and a second pressurizing pulley block is disposed on the other side thereof; A direction-changing pulley block is arranged on the fuselage platform and adjacent to the column; A fixed pulley block is arranged on the side of the fuselage platform and adjacent to the column; A first steel wire rope has one end fixed on the pressurizing winch and operably wound on the pressurizing winch, and the other end extends out of the pressurizing winch and passes through the changing pulley block, then passes around the first pressurizing pulley block of one of the stirring power heads, then passes around its second pressurizing pulley block, and then passes around the fixed pulley block downward. Then, the first steel wire rope extends upward from the fixed pulley block, passes around the first pressurizing pulley block of another stirring power head, then passes around its second pressurizing pulley block, and then extends downward and is fixed to the fuselage platform.

2. A multi-power head pressurized pile mixing machine according to claim 1, characterized in that: The multi-power head pressurized mixing pile driver also includes power head winches matching the number of the mixing power heads, and the power head winches are arranged at intervals on the fuselage platform; the corresponding mixing power heads are driven to move up and down respectively through the second steel wire ropes.

3. A multi-power head pressurized pile mixing machine according to claim 1 or 2, characterized in that: The multi-power head pressurized pile mixing machine also includes a supporting diagonal rod, one end of which is hinged to the fuselage platform, and the other end of which is hinged to the column.

4. A multi-power head pressurized hydraulic system for a multi-power head pressurized pile mixing machine as claimed in any one of claims 1 to 3, characterized in that: It includes a plunger pump, a multi-way electric proportional valve connected to the plunger pump, a pressurization control module and at least two power head winch control modules connected to the multi-way electric proportional valve; The multi-connected electric proportional multi-way valve includes a pressurized reversing valve and at least two power head reversing valves matched with the power head hoisting control module; the pressurized reversing valve includes a pressurized reversing valve body and a first proportional electromagnet and a second proportional electromagnet respectively arranged at both ends thereof, and the pressurized reversing valve body is driven to reverse by controlling the gain and loss of electricity of the corresponding proportional electromagnets to realize the forward or reverse rotation of the pressurized control module; The power head reversing valve comprises a power head reversing valve body and a third proportional electromagnet and a fourth proportional electromagnet respectively arranged at two ends thereof, and the power head reversing valve is driven to reverse the power head winch control module by controlling the gain and loss of electricity of the corresponding proportional electromagnets. The pressurization control module includes a pressurization winch hydraulic motor and a floating solenoid valve arranged in parallel with the pressurization winch hydraulic motor, and the floating solenoid valve is used to control the connection or disconnection of two working oil ports of the pressurization winch hydraulic motor.

5. The multi-power head pressurized hydraulic system according to claim 4, characterized in that: The multi-connection electric proportional multi-way valve also includes an electric proportional overflow valve for adjusting the pressurization pressure of the pressurized winch.

6. A control method for a multi-power head pressurized pile mixing machine, comprising a multi-power head pressurized hydraulic system of a multi-power head pressurized pile mixing machine as claimed in claim 4 or 5, characterized in that: The steps include: S1: When any power head winch needs to lift the stirring power head, the fourth proportional solenoid on the multi-way electric proportional valve is energized, the floating solenoid valve of the pressurization control module is energized, the two working oil ports of the pressurization winch hydraulic motor are connected, and the pressurization winch follows the lifting action of any power head winch to release the rope; S2: When any power head winch needs to lower the mixing power head, the third proportional solenoid on the multi-way electric proportional valve is energized, and the first proportional solenoid is energized, and the pressurizing winch follows the lowering action of any power head winch to collect the rope and pressurize; During the pressurization process, when the pressure on any stirring power head is less than the first pressurization preset value, the electric proportional relief valve is controlled to be energized and its initial pressure value is set to AMPa, pressure continues to be applied to the stirring power head, and the pressure value of the electric proportional relief valve is gradually adjusted until the pressure on the stirring power head is greater than the first pressurization preset value and less than the second pressurization preset value.

7. The control method according to claim 6, characterized in that: In step S2, when the pressure value of the electric proportional relief valve is gradually adjusted, if the pressure on the stirring power head is less than the first pressurization preset value at the initial pressure value AMPa, BMPa is increased on the basis of the initial pressure value AMPa, and it is determined whether the pressure on the stirring power head is greater than the first pressurization preset value. If it is greater than the first pressurization preset value, the electric proportional relief valve maintains the current set pressure value. If it is still less than the first pressurization preset value, adjust the set pressure value of the electric proportional relief valve to (A+nB) MPa, where n is a non-zero positive integer greater than 1, until the pressure on the stirring power head is greater than the first pressurization preset value.

8. The control method according to claim 7, characterized in that: When the pressure value of the electric proportional relief valve is gradually adjusted, if the pressure on the stirring power head is greater than the second pressurization preset value, the set pressure value of the electric proportional relief valve is adjusted to (A+(n-1)B) MPa.

9. The control method according to any one of claims 6 to 8, characterized in that: The control method further comprises step S0, wherein: when all power head winches are not in action, the pressurizing winch is controlled separately, the first proportional electromagnet is controlled to be energized, the pressurizing winch receives the first steel wire rope, and the second proportional electromagnet is controlled to be energized, the pressurizing winch releases the first steel wire rope.

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