CN114658706A - Pile clamping force adaptive control device and static pile driver - Google Patents

Abstract

A pile clamping force adaptive control device and a static pile driver, the pile clamping force adaptive control device comprises a pile clamping oil cylinder, a first pile pressing oil cylinder, a second pile pressing oil cylinder, first, second and third oil ports , fifth and sixth oil paths, the first oil port is connected to the first cavity of the pile clamping cylinder through the first oil path, the second oil port is connected to the third cavity of the first pile pressing cylinder through the second oil path, the third The three oil ports are connected to the fifth chamber of the second pile pressing cylinder through the third oil circuit; the fifth and sixth oil circuits are respectively provided with a first pressure reducing valve, a second pressure reducing valve, The set pressure of the pressure reducing valve increases sequentially. In the self-adaptive control device for pile clamping force and the static pile driver of the present invention, by setting pressure reducing valves with different pressure reduction values, the pile clamping force can be automatically increased with the increase of the number of pile driving oil cylinders participating in pile driving. , so that the pile clamping force is adaptive to the pile pressing force, which not only saves the auxiliary work time, but also avoids the phenomenon that the pile clamping force is too small and slips, and the pile is clamped and broken due to the excessive clamping force.

Description

Pile clamping force adaptive control device and static pile driver

technical field

The invention relates to the technical field of construction machinery, in particular to a pile clamping force adaptive control device and a static pile driver.

Background technique

The static pile driver has the advantages of no noise, no pollution (motor driven) and high operating efficiency, and is especially suitable for urban building foundation construction. The operation of the static pile driver is to use the hydraulic cylinder of the pile clamp to clamp the pile, and then use the pile driving cylinder to push the pile clamp to press the pile into the ground. An important requirement for the hydrostatic pile driver is to firmly clamp the pile body, but at the same time, the pile body will not be cracked due to the excessive clamping force, which is a key factor affecting the normal operation of the hydrostatic pile driver. .

At present, the pile clamping force of the pile clamping cylinder of the static pile driver is preset, and the pile clamping force is not directly related to the pile driving force; during operation, as the pile driving resistance increases, it is often possible to In order to prevent slippage between the pile clamping oil cylinder and the pile body, it is often necessary to set the pile clamping force of the pile clamping control hydraulic system to be very large at the beginning, so that the pile body is easily broken during the pile pressing process.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a pile clamping force adaptive control device and a static pile driver which can prevent the clamping pile from slipping and ensure that the pile clamping force is not too large.

The invention provides a pile clamping force adaptive control device, comprising a pile clamping oil cylinder, a first pile pressing oil cylinder, a second pile pressing oil cylinder, a first oil port, a second oil port and a third oil port. It includes a first cavity and a second cavity, the first pile driving cylinder includes a third cavity and a fourth cavity, the second pile driving cylinder includes a fifth cavity and a sixth cavity, and the first oil port passes through the first cavity. The oil passage is connected to the first cavity, the second oil port is connected to the third cavity through the second oil passage, and the third oil port is connected to the fifth cavity through the third oil passage;

The pile clamping force adaptive control device also includes a fifth oil circuit connected between the first oil circuit and the second oil circuit, and a fifth oil circuit connected between the first oil circuit and the third oil circuit. The sixth oil circuit between the fifth oil circuit and the sixth oil circuit are respectively provided with a first pressure reducing valve and a second pressure reducing valve, the first pressure reducing valve and the second pressure reducing valve The set pressure increases sequentially.

In one embodiment, the pile clamping force adaptive control device further includes a fifth oil port, a sixth oil port, and a seventh oil port, and the fifth oil port is connected to the pile clamping oil cylinder through an eighth oil circuit the second cavity, the sixth oil port is connected to the fourth cavity of the first pile driving oil cylinder through a ninth oil circuit, and the seventh oil port is connected to the first piling cylinder through a tenth oil circuit. The sixth cavity of the second pile driving oil cylinder; the pile clamping force adaptive control device further includes a twelfth oil circuit, and the twelfth oil circuit is connected to the third oil circuit and the tenth oil circuit In between, the twelfth oil circuit is provided with a first hydraulic lock, and the control oil port of the first hydraulic lock is connected to the ninth oil circuit.

In one embodiment, the pile clamping force adaptive control device further includes a first control valve, and the first control valve is arranged between the first hydraulic lock and the ninth oil circuit.

In one embodiment, the first control valve includes a first position and a second position. In the first position, the first control valve communicates the first hydraulic lock and the oil tank, and the first hydraulic lock When the second position is closed, the first control valve communicates the first hydraulic lock with the ninth oil circuit, and the first hydraulic lock is opened.

In one embodiment, the twelfth oil circuit is further provided with a first check valve, and the twelfth oil circuit is also connected to the fuel tank.

In one embodiment, the pile clamping force adaptive control device further includes a third hydraulic lock, the third hydraulic lock is connected between the third cavity of the first pile driving cylinder and the oil tank, the The control oil port of the third hydraulic lock is connected to the ninth oil circuit.

In one embodiment, the pile clamping force adaptive control device further includes a relief valve, the relief valve is connected between the first oil circuit and the eighth oil circuit, and the relief valve is The set pressure is lower than the set pressure of the first pressure reducing valve.

In one embodiment, the pile clamping force adaptive control device further includes a fifth oil port, a sixth oil port, and a seventh oil port, and the fifth oil port is connected to the pile clamping oil cylinder through an eighth oil circuit the second cavity, the sixth oil port is connected to the fourth cavity of the first pile driving cylinder through the ninth oil circuit, and the seventh oil port is connected to the fourth chamber through the tenth oil circuit the sixth cavity of the second pile driving oil cylinder; the pile clamping force adaptive control device further includes a third hydraulic lock and a fifth hydraulic lock, the third hydraulic lock is connected to the first pile driving oil cylinder. Between the third cavity and the oil tank, the control oil port of the third hydraulic lock is connected to the ninth oil circuit, and the fifth hydraulic lock is connected to the fifth cavity of the second pile driving cylinder Between the oil tank and the oil tank, the control oil port of the fifth hydraulic lock is connected to the tenth oil circuit.

In one embodiment, the pile clamping force adaptive control device further includes a third pile driving oil cylinder and a fourth oil port, the third pile driving oil cylinder includes a seventh cavity and an eighth cavity, and the fourth oil port Connected to the seventh cavity of the third pile driving oil cylinder through a fourth oil circuit, the pile clamping force adaptive control device further comprises a The seventh oil circuit is provided with a third pressure reducing valve, and the set pressure of the third pressure reducing valve is greater than the set pressure port of the second pressure reducing valve.

The present invention also provides a static pile driver, which includes the above-mentioned pile clamping force adaptive control device.

In the self-adaptive control device for pile clamping force and the static pile driver of the present invention, by setting pressure reducing valves with different pressure reduction values, the pile clamping force can be automatically increased with the increase of the number of pile driving oil cylinders participating in pile driving. , even if the pile clamping force is adaptive to the pile pressing force, there is no need to manually adjust the pile clamping force, which not only saves the auxiliary work time, but also avoids the phenomenon that the pile clamping force is too small and slips, and the phenomenon that the pile clamping force is too large is avoided.

Description of drawings

FIG. 1 is a hydraulic principle diagram of the pile clamping force adaptive control device according to the first embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a pile clamping force adaptive control device according to a second embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a pile clamping force adaptive control device according to a third embodiment of the present invention.

Detailed ways

In order to further illustrate the technical methods and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific embodiments, structures, features and effects of the present invention are described in detail below with reference to the accompanying drawings and examples.

first embodiment

As shown in FIG. 1, the pile clamping force adaptive control device according to the first embodiment of the present invention includes a pile clamping oil cylinder 11, a first pile pressing oil cylinder 13, a second pile pressing oil cylinder 15, a third pile pressing oil cylinder 17, a first oil Port 19, second oil port 21, third oil port 23 and fourth oil port 25, pile clamping cylinder 11 includes first cavity 112 and second cavity 114, first pile driving cylinder 13 includes third cavity 132 and fourth cavity The cavity 134 , the second pile driving cylinder 15 includes a fifth cavity 152 and a sixth cavity 154 , and the third pile driving cylinder 17 includes a seventh cavity 172 and an eighth cavity 174 . The first oil port 19 is connected to the first cavity 112 through the first oil passage 20, the second oil port 21 is connected to the third cavity 132 of the first pile driving cylinder 13 through the second oil passage 22, and the third oil port 23 passes through the The three oil passages 24 are connected to the fifth chamber 152 of the second pile pressing cylinder 15 , and the fourth oil port 25 is connected to the seventh chamber 172 of the third pile pressing cylinder 17 through the fourth oil passage 26 . The pile clamping force adaptive control device further includes a fifth oil circuit 28 connected between the first oil circuit 20 and the second oil circuit 22 and a sixth oil circuit connected between the first oil circuit 20 and the third oil circuit 24 The circuit 30 and the seventh oil circuit 32 connected between the first oil circuit 20 and the fourth oil circuit 26, the fifth oil circuit 28, the sixth oil circuit 30 and the seventh oil circuit 32 are respectively provided with a first decompression The set pressures of the valve 34a, the second pressure reducing valve 34b, the third pressure reducing valve 34c, the first pressure reducing valve 34a, the second pressure reducing valve 34b, and the third pressure reducing valve 34c are sequentially increased.

In the pile clamping force adaptive control device of this embodiment, by setting three pressure reducing valves with different pressure reduction values, the pile clamping force can be automatically increased with the increase of the number of pile driving cylinders participating in the pile driving, even if the pile clamping force increases. The pile clamping force is self-adapting to the pile pressing force, and there is no need to manually adjust the pile clamping force, which not only saves the auxiliary work time, but also avoids the phenomenon that the pile clamping force is too small and slips, and the phenomenon that the pile clamping force is too large is avoided.

In this embodiment, the fifth oil passage 28 , the sixth oil passage 30 and the seventh oil passage 32 are respectively provided with check valves 36 . By arranging the one-way valve 36 , the hydraulic oil can be prevented from entering each pile driving cylinder in the reverse direction from the first cavity 112 of the pile clamping cylinder 11 .

In this embodiment, the pile clamping force adaptive control device further includes a fifth oil port 40 , a sixth oil port 42 , a seventh oil port 44 and an eighth oil port 46 , and the fifth oil port 40 is connected through an eighth oil passage 48 . In the second cavity 114 of the pile clamping oil cylinder 11 , the sixth oil port 42 is connected to the fourth cavity 134 of the first pile driving oil cylinder 13 through the ninth oil passage 49 , and the seventh oil port 44 is connected to the first oil passage 50 through the tenth oil passage 50 . The sixth cavity 154 of the second pile driving cylinder 15 and the eighth oil port 46 are connected to the eighth cavity 174 of the third pile driving cylinder 17 through the eleventh oil passage 51 . Specifically, the first cavity 112, the third cavity 132, the fifth cavity 152 and the seventh cavity 172 may be rodless cavities (ie large cavities), the second cavity 114, the fourth cavity 134, the sixth cavity 154 and the eighth cavity The cavity 174 may be a rod cavity (ie, a small cavity). In addition, when supplying oil to the first cavity 112, the third cavity 132, the fifth cavity 152 and the seventh cavity 172, the pile clamping oil cylinder 11 applies pile clamping force, the pile pressing oil cylinder applies pile pressing force, and the fifth oil port 40, The sixth oil port 42 , the seventh oil port 44 and the eighth oil port 46 return oil. It can be understood that when oil is supplied to the second cavity 114, the fourth cavity 134, the sixth cavity 154 and the eighth cavity 174, the pile clamping oil cylinder 11 applies the pile clamping force, the pile pressing oil cylinder applies the pile pressing force, and the fifth The oil return port 40 , the sixth oil port 42 , the seventh oil port 44 and the eighth oil port 46 can be set as required.

In this embodiment, the pile clamping force adaptive control device further includes a twelfth oil circuit 53 and a thirteenth oil circuit 55, and the twelfth oil circuit 53 is connected between the third oil circuit 24 and the tenth oil circuit 50, The thirteenth oil passage 55 is connected between the fourth oil passage 26 and the eleventh oil passage 51 , and the twelfth oil passage 53 and the thirteenth oil passage 55 are respectively provided with a first hydraulic lock 57 and a second hydraulic lock 58. The control oil ports of the first hydraulic lock 57 and the second hydraulic lock 58 are both connected to the ninth oil circuit 49. In this way, when the first pile pressing cylinder 13 is lifted up, the hydraulic oil enters the fourth chamber 134 from the sixth oil port 42, and the high-pressure oil on the ninth oil passage 49 will open the first hydraulic lock 57 and the second hydraulic lock 58, The hydraulic oil in the fifth cavity 152 of the second pile driving cylinder 15 and the seventh cavity 172 of the third pile driving cylinder 17 flow to the sixth cavity 154 and the eighth cavity 174 respectively, and the cylinder rod of the first pile driving cylinder 13 returns to the cylinder rod. At the same time, the cylinder rods of the second pile driving oil cylinder 15 and the third pile driving oil cylinder 17 are retracted. In this way, only the first pile pressing oil cylinder 13 needs to be supplied with oil when the pile pressing oil cylinder is lifted up, which reduces the hydraulic oil flow required by the system, further reduces the required displacement of the hydraulic pump, and saves the system cost.

Specifically, the pile clamping force adaptive control device further includes a first control valve 60 and a second control valve 61 , the first control valve 60 is provided between the first hydraulic lock 57 and the ninth oil circuit 49 , and the second control valve 61 It is provided between the second hydraulic lock 58 and the ninth oil passage 49 . Specifically, the first control valve 60 and the second control valve 61 may be electromagnetic directional valves. More specifically, both the first control valve 60 and the second control valve 61 include a first position and a second position. In the first position, the first control valve 60 communicates with the first hydraulic lock 57 and the oil tank, and the second control valve 61 communicates with the oil tank. The second hydraulic lock 58 and the oil tank drain oil from the control oil ports of the first hydraulic lock 57 and the second hydraulic lock 58, so that the first hydraulic lock 57 and the second hydraulic lock 58 are closed. In the second position, the first control valve 60 connects the first hydraulic lock 57 and the ninth oil circuit 49, and the second control valve 61 connects the second hydraulic lock 58 and the ninth oil circuit 49, so that the first hydraulic lock 57 and the second hydraulic lock 58 are opened.

Specifically, the twelfth oil circuit 53 is further provided with a first one-way valve 63 , the thirteenth oil circuit 55 is further provided with a second one-way valve 64 , the twelfth oil circuit 53 and the thirteenth oil circuit 55 Also connected to the fuel tank.

In this embodiment, the pile clamping force adaptive control device further includes a third hydraulic lock 66, which is connected between the third cavity 132 of the first pile driving cylinder 13 and the oil tank. The control of the third hydraulic lock 66 The oil port is connected to the ninth oil passage 49 . Through the third hydraulic lock 66, when the hydraulic oil enters the fourth chamber 134 through the sixth oil port 42, the hydraulic oil in the third chamber 132 can be returned to oil, so as to make up for the oil circuit connected to the second oil port 21 due to the throttle valve, etc. The existence of the oil return caused by the poor. It can be understood that when the oil return of the second oil port 21 is smooth, the third hydraulic lock 66 can be omitted.

In this embodiment, the pile clamping force adaptive control device further includes a relief valve 68, the relief valve 68 is connected between the first oil passage 20 and the eighth oil passage 48, and the set pressure of the relief valve 68 is lower than the first oil passage 48. The set pressure of the pressure reducing valve 34a.

In this embodiment, the pile clamping force adaptive control device further includes a fourth hydraulic lock 70 , the fourth hydraulic lock 70 is arranged on the first oil circuit 20 , and the control oil port of the fourth hydraulic lock 70 is connected to the eighth oil circuit 48 . The arrangement of the fourth hydraulic lock 70 can lock the pile clamping oil cylinder 11 to prevent the pile clamping oil 11 from leaking and loosening.

The working process of the pile clamping force adaptive control device will be specifically described below.

When the prefabricated pile is pre-clamped, the hydraulic oil enters the first cavity 112 of the pile clamping cylinder 11 through the first oil port 19 , the fourth hydraulic lock 70 and the first oil circuit 20 , and the hydraulic oil in the second cavity 114 of the pile clamping cylinder 11 The hydraulic oil is returned to oil through the fifth oil port 40, the cylinder rod of the pile clamping cylinder 11 is extended to clamp the prefabricated pile, the excess hydraulic oil is returned to the oil through the overflow valve 68, and the pile clamping cylinder 11 completes the pre-clamping of the prefabricated pile. When the prefabricated pile is pressed in, the hydraulic oil enters the third cavity 132 of the first pile driving cylinder 13 through the second oil port 21 , and the hydraulic oil in the fourth cavity 134 of the first pile driving cylinder 13 returns to oil through the sixth oil port 42 , the cylinder rod of the first pile pressing cylinder 13 extends to press the prefabricated piles into the foundation; at the same time, the hydraulic oil enters the first cavity 112 of the pile clamping cylinder 11 through the first pressure reducing valve 34a, and the pile clamping cylinder 11 increases the clamping force for the precast piles. tight. When the pressure of the first pile driving cylinder 13 is not enough to press the prefabricated piles into the foundation, the hydraulic oil enters the fifth cavity 152 of the second pile driving cylinder 15 through the third oil port 23 and the sixth cavity 154 of the second pile driving cylinder 15 The middle hydraulic oil returns oil through the seventh oil port 44, the cylinder rod of the second pile pressing oil cylinder 15 extends, and the second pile pressing oil cylinder 15 and the first pile pressing oil cylinder 13 jointly press the prefabricated pile into the foundation; The second pressure reducing valve 34b enters the first cavity 112 of the pile clamping cylinder 11, and the pile clamping cylinder 11 continues to increase the clamping force on the prefabricated pile. When the pressure of the first pile driving cylinder 13 and the second pile driving cylinder 15 is not enough to press the prefabricated pile into the foundation, the hydraulic oil enters the seventh cavity 172 of the third pile driving cylinder 17 through the fourth oil port 25, and the third pressure The hydraulic oil in the eighth cavity 174 of the pile oil cylinder 17 returns oil through the eighth oil port 46, the cylinder rod of the third pile pressure cylinder 17 extends, the third pile pressure cylinder 17 and the second pile pressure cylinder 15 and the first pile pressure The oil cylinders 13 jointly press the prefabricated piles into the foundation; at the same time, the hydraulic oil enters the first cavity 112 of the pile clamping cylinder 11 through the third pressure reducing valve 34c, and the pile clamping cylinder 11 continues to increase the clamping force on the prefabricated piles. When the pile pressing is completed, the hydraulic oil enters the second cavity 114 of the pile clamping cylinder 11 through the fifth oil port 40 , and the hydraulic oil in the first cavity 112 of the pile clamping cylinder 11 returns through the fourth hydraulic lock 70 and the first oil port 19 Oil, the pile clamping cylinder 11 cylinder rod retracts, loosening the prefabricated pile. When the pile pressing oil cylinder is lifted up, the hydraulic oil enters the fourth cavity 134 of the first pile pressing oil cylinder 13 through the sixth oil port 42, and the hydraulic oil in the third cavity 132 of the first pile pressing oil cylinder 13 passes through the third hydraulic lock 66 and The second oil port 21 returns oil, and the cylinder rod of the first pile pressing cylinder 13 is retracted; at the same time, the hydraulic oil pushes the first hydraulic lock 57 through the first control valve 60, and the cylinder rod of the first pile pressing cylinder 13 is retracted to drive the first hydraulic lock 57. The cylinder rod of the second pile driving cylinder 15 is retracted, and the hydraulic oil in the fifth cavity 152 of the second pile driving cylinder 15 enters the sixth cavity 154 of the second pile driving cylinder 15 through the first hydraulic lock 57 and the first check valve 63 , the sixth cavity 154 of the second pile pressing cylinder 15 is replenished with oil; at the same time, the hydraulic oil pushes the second hydraulic lock 58 through the second control 61, and the cylinder rod of the first pile pressing cylinder 13 retracts to drive the third pile pressing cylinder. The cylinder rod of 17 is retracted, and the hydraulic oil in the seventh chamber 172 of the third pile pressing cylinder 17 enters the eighth chamber 174 of the third pile pressing cylinder 17 through the second hydraulic lock 58 and the second one-way valve 64. The eighth chamber 174 of the pile driving cylinder 17 is filled with oil.

Second Embodiment

The structure of the pile clamping force adaptive control device of the second embodiment of the present invention is similar to the pile clamping force adaptive control device of the first embodiment, the difference is, please refer to FIG. The force adaptive control device only includes two pile pressing cylinders, namely the first pile pressing oil cylinder 13 and the second pile pressing oil cylinder 15 . Other structures of this embodiment are the same as those of the first embodiment, and are not repeated here.

Third Embodiment

The structure of the pile clamping force adaptive control device of the third embodiment of the present invention is similar to the pile clamping force adaptive control device of the first embodiment, the difference is, please refer to FIG. The force adaptive control device does not include the twelfth oil circuit 53 and the thirteenth oil circuit 55, and the pile clamping force adaptive control device also includes a fifth hydraulic lock 72 and a sixth hydraulic lock 74, and the fifth hydraulic lock 72 is connected to the first hydraulic lock 72. Between the fifth cavity 152 of the second pile driving cylinder 15 and the oil tank, the control oil port of the fifth hydraulic lock 72 is connected to the tenth oil circuit 50 , and the sixth hydraulic lock 74 is connected to the seventh cavity 172 of the third pile driving cylinder 17 . Between the oil tank and the oil tank, the control oil port of the sixth hydraulic lock 74 is connected to the eleventh oil passage 51 . The functions of the fifth hydraulic lock 72 and the sixth hydraulic lock 74 are also the same as those of the third hydraulic lock 66, but for assisting oil return, the fifth chamber 152 of the second pile driving cylinder 15 is not communicated with the sixth chamber 154, The seventh cavity 172 of the third pile driving cylinder 17 will not be communicated with the eighth cavity 174, that is, when the pile driving cylinder is lifted up, the fourth cavity 134 of the first pile driving cylinder 13 and the second pile driving cylinder 15 will be connected to each other. The sixth chamber 154 and the eighth chamber 174 of the third pile pressing cylinder 17 respectively provide pressure oil. Other structures of this embodiment are the same as those of the first embodiment, and are not repeated here.

The present invention also provides a static pile driver, which includes any of the above-mentioned pile clamping force adaptive control devices.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, Within the scope of the technical solution of the present invention, when some changes or modifications can be made by using the technical content disclosed above to be equivalent embodiments with equivalent changes, but without departing from the technical solution content of the present invention, according to the technical essence of the present invention. Any simple modifications, equivalent changes and modifications made in the above embodiments still fall within the scope of the technical solutions of the present invention.

Claims (10)

1. The pile clamping force self-adaptive control device is characterized by comprising a pile clamping oil cylinder (11), a first pile pressing oil cylinder (13), a second pile pressing oil cylinder (15), a first oil port (19), a second oil port (21) and a third oil port (23), wherein the pile clamping oil cylinder (11) comprises a first cavity (112) and a second cavity (114), the first pile pressing oil cylinder (13) comprises a third cavity (132) and a fourth cavity (134), the second pile pressing oil cylinder (15) comprises a fifth cavity (152) and a sixth cavity (154), the first oil port (19) is connected to the first cavity (112) through a first oil path (20), the second oil port (21) is connected to the third cavity (132) through a second oil path (22), and the third oil port (23) is connected to the fifth cavity (152) through a third oil path (24);

the pile clamping force self-adaptive control device further comprises a fifth oil way (28) connected between the first oil way (20) and the second oil way (22) and a sixth oil way (30) connected between the first oil way (20) and the third oil way (24), a first reducing valve (34a) and a second reducing valve (34b) are respectively arranged on the fifth oil way (28) and the sixth oil way (30), and the set pressures of the first reducing valve (34a) and the second reducing valve (34b) are sequentially increased.

2. The pile clamping force adaptive control device according to claim 1, further comprising a fifth oil port (40), a sixth oil port (42), and a seventh oil port (44), wherein the fifth oil port (40) is connected to the second chamber (114) of the pile clamping cylinder (11) through an eighth oil path (48), the sixth oil port (42) is connected to the fourth chamber (134) of the first pile pressing cylinder (13) through a ninth oil path (49), and the seventh oil port (44) is connected to the sixth chamber (154) of the second pile pressing cylinder (15) through a tenth oil path (50); the pile clamping force self-adaptive control device further comprises a twelfth oil way (53), the twelfth oil way (53) is connected between the third oil way (24) and the tenth oil way (50), a first hydraulic lock (57) is arranged on the twelfth oil way (53), and a control oil port of the first hydraulic lock (57) is connected to the ninth oil way (49).

3. Pile clamping force adaptive control device according to claim 2, characterized in that the pile clamping force adaptive control device further comprises a first control valve (60), the first control valve (60) being arranged between the first hydraulic lock (57) and the ninth oil channel (49).

4. Pile clamping force adaptive control device according to claim 3, characterized in that the first control valve (60) comprises a first position and a second position, the first control valve (60) communicates the first hydraulic lock (57) with a fuel tank when in the first position, the first hydraulic lock (57) is closed, the first control valve (60) communicates the first hydraulic lock (57) with the ninth oil path (49) when in the second position, and the first hydraulic lock (57) is opened.

5. A pile clamping force adaptive control device according to claim 2, wherein a first check valve (63) is further arranged on the twelfth oil path (53), and the twelfth oil path (53) is further connected to an oil tank.

6. The pile clamping force adaptive control device according to claim 2, further comprising a third hydraulic lock (66), wherein the third hydraulic lock (66) is connected between the third chamber (132) of the first pile pressing oil cylinder (13) and an oil tank, and a control oil port of the third hydraulic lock (66) is connected to the ninth oil passage (49).

7. The pile clamping force adaptive control device according to claim 2, further comprising a relief valve (68), the relief valve (68) being connected between the first oil passage (20) and the eighth oil passage (48), a set pressure of the relief valve (68) being smaller than a set pressure of the first pressure reducing valve (34 a).

8. The pile clamping force adaptive control device according to claim 7, further comprising a fifth oil port (40), a sixth oil port (42), and a seventh oil port (44), wherein the fifth oil port (40) is connected to the second chamber (114) of the pile clamping cylinder (11) through an eighth oil path (48), the sixth oil port (42) is connected to the fourth chamber (134) of the first pile pressing cylinder (13) through the ninth oil path (49), and the seventh oil port (44) is connected to the sixth chamber (154) of the second pile pressing cylinder (15) through a tenth oil path (50); the pile clamping force self-adaptive control device further comprises a third hydraulic lock (66) and a fifth hydraulic lock (72), the third hydraulic lock (66) is connected between the third cavity (132) of the first pile pressing oil cylinder (13) and an oil tank, a control oil port of the third hydraulic lock (66) is connected to the ninth oil path (49), the fifth hydraulic lock (72) is connected between the fifth cavity (152) of the second pile pressing oil cylinder (15) and the oil tank, and a control oil port of the fifth hydraulic lock (72) is connected to the tenth oil path (50).

9. The pile clamping force adaptive control device according to claim 1, further comprising a third pile pressing cylinder (17) and a fourth oil port (25), wherein the third pile pressing cylinder (17) comprises a seventh cavity (172) and an eighth cavity (174), the fourth oil port (25) is connected to the seventh cavity (172) of the third pile pressing cylinder (17) through a fourth oil path (26), the pile clamping force adaptive control device further comprises a seventh oil path (32) connected between the first oil path (20) and the fourth oil path (26), a third pressure reducing valve (34c) is arranged on the seventh oil path (32), and the set pressure of the third pressure reducing valve (34c) is greater than the set pressure of the second pressure reducing valve (34 b).

10. A static pile press comprising the pile clamping force adaptive control device according to any one of claims 1-9.

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