A thrust device for shield machine

Abstract

The embodiment of the present invention provides a thrust device for a shield machine, including a clamping mechanism, a thrust mechanism and a control mechanism; the clamping mechanism includes a main body and a first driving part and two clamping members fixedly arranged on the main body, the first driving part includes a first driver and a first driving member with retractable ends, when the two ends of the first driving member are extended, the bottoms of the two clamping members gradually approach; the front end of the main body is provided with a first connecting member; the thrust mechanism includes a second driving part, the second driving part includes a second driver and a second driving member, the second end is retractable, and a third connecting member is provided at the end, and the third connecting member cooperates with the connecting part of the device to be thrust; the control mechanism is used to control the first driver to drive the extension and retraction of the two ends of the first driving member, and control the second driver to drive the extension and retraction of the second driving member. The thrust device for a shield machine using the embodiment of the present invention can realize the forward movement of a large shield machine on the track, and it is simple to operate and highly efficient.

Description

Technical Field

[0001] The present invention belongs to the technical field of shield machine assembly, and mainly relates to a shield machine assembly forward pushing technology, and specifically relates to a shield machine pushing device. Background Art

[0002] With the continuous development of the shield industry, the application demand for large-diameter shield machines and super-large-diameter shield machines is increasing. When assembling a shield machine, the traditional winch towing method is usually adopted, using the winch to drag the shield machine forward on the track. However, when assembling a super-large-diameter shield machine, due to the heavy equipment itself, if the traditional winch towing method is adopted, multiple sets of winches need to work simultaneously to complete the forward movement of the shield machine on the track, which is complicated to operate, inefficient, and costly. Summary of the invention

[0003] The present invention provides a jacking device for a shield machine, so as to realize the forward movement of a large shield machine on a track, reduce the operation complexity and improve the efficiency.

[0004] To achieve the above-mentioned purpose, an embodiment of the present invention provides a thrust device for a shield machine, including a clamping mechanism, a thrust mechanism and a control mechanism; the clamping mechanism includes a main body, a first driving part and two clamping members, the first driving part includes a first driver and a first driving member with retractable ends, the first driving member and the two clamping members are fixedly arranged on the main body, the two clamping members are located at the two ends of the first driver, and the two ends of the first driving member are respectively hinged to the tops of the two clamping members; the two clamping members can rotate around their middle positions, and when the two ends of the first driving member are extended, the bottoms of the two clamping members gradually approach each other; a walking part is provided at the bottom of the main body, and a first connecting member is provided at the front end of the main body; the thrust mechanism includes a second driving part, the second driving part includes a second driver and a second driving member, the first end of the second driving member is provided with a second connecting member, and the second connecting member cooperates with the first connecting member; the second end is retractable, and a third connecting member is provided at the end, and the third connecting member cooperates with the connecting part of the device to be pushed; the control mechanism is used to control the first driver to drive the extension and retraction of the two ends of the first driving member, and to control the second driver to drive the extension and retraction of the second driving member.

[0005] Optionally, the control mechanism includes a clamping control part and a pushing control part, the clamping control part is used to control the first driver to drive the extension and retraction of both ends of the first driving member, and the clamping control part is used to control the second driver to drive the extension and retraction of the second driving member.

[0006] Optionally, the clamping control unit includes a first starting circuit and a first control circuit; both ends of the first starting circuit are connected to the power supply, including a first relay and a second switch connected in series; the first starting circuit also includes a first contactor, which is connected in series with the first normally open contact of the first relay and then connected to the power supply, and the first driver is connected in series with the normally open contact of the first contactor and then connected to the power supply; the first end of the first control circuit is connected to the power supply, and the second end is connected between the first relay and the second switch; the first control circuit includes a second relay and a third switch connected in series; a first electromagnetic reversing valve is connected between the first driver and the first driving member, and the first valve position of the first electromagnetic reversing valve is connected in series with the third normally open contact of the second relay and then connected to the power supply.

[0007] Optionally, the first control circuit also includes a third relay and a fourth switch, which are connected in series and in parallel at both ends of the second relay and the third switch in series; the second valve position of the first electromagnetic reversing valve is connected in series with the fifth normally open contact of the third relay and is connected to the power supply; the first normally closed contact of the second relay is connected in series between the third relay and the fourth switch, and the second normally closed contact of the third relay is connected in series between the second relay and the third switch.

[0008] Optionally, the push control part includes a second starting circuit and a second control circuit; both ends of the second starting circuit are connected to the power supply, including a fourth relay and a seventh switch connected in series; the second starting circuit also includes a second contactor, which is connected in series with the seventh normally open contact of the fourth relay and then connected to the power supply, and the second driver is connected in series with the normally open contact of the second contactor and then connected to the power supply; the first end of the second control circuit is connected to the power supply, and the second end is connected between the fourth relay and the seventh switch; the second control circuit includes a fifth relay and an eighth switch connected in series; a second electromagnetic reversing valve is connected between the second driver and the second driving member, and the third valve position of the second electromagnetic reversing valve is connected in series with the ninth normally open contact of the fifth relay and then connected to the power supply.

[0009] Optionally, the second control circuit also includes a sixth relay and a ninth switch, which are connected in series and in parallel at both ends of the fifth relay and the eighth switch connected in series; the fourth valve position of the second electromagnetic reversing valve is connected in series with the eleventh normally open contact of the sixth relay and is connected to the power supply; the third normally closed contact of the fifth relay is connected in series between the sixth relay and the ninth switch, and the fourth normally closed contact of the sixth relay is connected in series between the fifth relay and the eighth switch.

[0010] Optionally, the first driver and / or the second driver comprises an electric pump, and the first driving member and / or the second driving member comprises a hydraulic cylinder.

[0011] Optionally, a guide rail seat is provided at the bottom of the main body, the guide rail seat cooperates with the track used for the equipment to be pushed, the guide rail seat is located in the middle of the two clamping members, and the bottom of the two clamping members is provided with clamping feet that cooperate with the track.

[0012] Optionally, the thrust device for the shield machine includes at least two groups of clamping mechanisms and thrust mechanisms, and the control mechanism is used to control the synchronous extension and retraction of both ends of the first driving members of the at least two groups of clamping mechanisms, and to control the synchronous extension and retraction of the telescopic ends of the second driving members of the at least two groups of thrust mechanisms.

[0013] Optionally, at least two groups of clamping mechanisms include a first driver, and the control mechanism is used to control the first driver to synchronously drive the two ends of at least two first driving members to synchronously extend and retract; at least two groups of pushing mechanisms include a second driver, and the control mechanism is also used to control the second driver to synchronously drive the telescopic ends of at least two second driving members to synchronously extend and retract.

[0014] A thrust device for a shield machine according to an embodiment of the present invention is provided with a clamping mechanism and a thrust mechanism, and a control mechanism is used to control the first driver of the clamping mechanism to drive the two ends of the first driver to extend, thereby driving the bottom clamping track of the two clamping members to achieve a fixing effect; and a control mechanism is used to control the second driver of the thrust mechanism to drive the telescopic end of the second driver to extend, thereby pushing the device to be thrust forward on the track; the retraction of the first driver can also drive the two clamping members to loosen the track, and the retraction of the second driver can drive the clamping mechanism to move forward, thereby completing the forward movement of the device to be thrust on the track, which can meet the power requirements for the forward movement of a heavier large shield machine, and is simple to operate and highly efficient. Moreover, the thrust device for a shield machine provided by the embodiment of the present invention has the characteristics of reliable performance and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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 these drawings without paying creative labor.

[0016] Figure 1 It is a schematic structural diagram of a thrust device for a shield machine according to an embodiment of the present invention from a first viewing angle;

[0017] Figure 2 It is a structural schematic diagram of a thrust device for a shield machine according to an embodiment of the present invention at a second viewing angle;

[0018] Figure 3 It is a structural schematic diagram of a clamping mechanism of a thrust device for a shield machine according to an embodiment of the present invention at a first viewing angle;

[0019] Figure 4 It is a structural schematic diagram of a clamping mechanism of a thrust device for a shield machine according to an embodiment of the present invention at a second viewing angle;

[0020] Figure 5 It is a schematic structural diagram of a clamping mechanism of a thrust device for a shield machine in an embodiment of the present invention at a third viewing angle;

[0021] Figure 6 A schematic diagram of a power system of a clamping mechanism of a thrust device for a shield machine according to an embodiment of the present invention;

[0022] Figure 7 A schematic diagram of a power system of a thrust mechanism of a thrust device for a shield machine according to an embodiment of the present invention;

[0023] Figure 8 A circuit diagram of a clamping control unit of a thrust device for a shield machine according to an embodiment of the present invention;

[0024] Fig. 9 The present invention is a circuit diagram of a jacking control unit of a jacking device for a shield machine according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] 1. Clamping mechanism; 11. Main body; 12. Clamping member; 13. First driving member; 14. Walking part; 15; First connecting member; 16. Clamping foot; 17. First electromagnetic reversing valve; 2. Pushing mechanism; 21. Second driving member; 22. Second connecting member; 23. Third connecting member; 24. Second electromagnetic reversing valve; 3. Equipment to be pushed; 31. Connecting part; 4. Track; KA1. First relay; KA2. Second relay; KA3. Third relay; KA4. Fourth relay; KA5. Fifth relay; KA6. Sixth relay; KA11. First normally open contact; KA12. Second normally open contact; KA21. Third normally open contact; KA22. Fourth normally open contact; KA23. First normally closed contact; KA31. Fifth normally open contact; KA32 , sixth normally open contact; KA33, second normally closed contact; KA41, seventh normally open contact; KA42, eighth normally open contact; KA51, ninth normally open contact; KA52, tenth normally open contact; KA53, third normally closed contact; KA61, eleventh normally open contact; KA62, twelfth normally open contact; KA63, fourth normally closed contact; KM1, first contactor; KM2, second contactor; SB1, first switch; SB2, second switch; SB3, third switch; SB4, fourth switch; SB5, fifth switch; SB6, sixth switch; SB7, seventh switch; SB8, eighth switch; SB9, ninth switch; SB10, tenth switch; YV1, first valve position; YV2, second valve position; YV3, third valve position; YV4, fourth valve position. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited to the basic implementation disclosed below.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] like Figures 1 to 5As shown, a thrust device for a shield machine according to an embodiment of the present invention comprises a thrust mechanism 2, a clamping mechanism 1 and a control mechanism; wherein the clamping mechanism 1 comprises a main body 11, a first driving part and two clamping members 12, the first driving part comprises a first driver and a first driving member 13 with retractable ends, the first driving member 13 and the two clamping members 12 are fixedly arranged on the main body 11, the two clamping members 12 are located at the two ends of the first driver, and the two ends of the first driving member 13 are respectively hinged to the tops of the two clamping members 12; the two clamping members 12 can rotate around their middle positions, and the rotation direction is consistent with the retractable direction of the two ends of the first driving member 13. When the two ends of the first driving member 13 are extended, , the bottoms of the two clamping members 12 gradually approach each other; a walking part 14 is provided at the bottom of the main body 11, and a first connecting member 15 is provided at the front end of the main body 11; the pushing mechanism 2 includes a second driving part, the second driving part includes a second driver and a second driving member 21, a second connecting member 22 is provided at the first end of the second driving member 21, and the second connecting member 22 cooperates with the first connecting member 15; the second end is retractable, and a third connecting member 23 is provided at the end, and the third connecting member 23 cooperates with the connecting part 31 of the device to be pushed; the control mechanism is used to control the first driver to drive the extension and retraction of the two ends of the first driving member 13, and control the second driver to drive the extension and retraction of the second driving member 21. In the clamping mechanism 1, the first driver drives the two ends of the first driving member 13 to extend and retract synchronously.

[0031] The thrust device for a shield machine according to the embodiment of the present invention is suitable for the forward movement of a shield machine on a track 4. The track 4 is clamped by a clamping mechanism 1 to achieve fixation, and the device to be pushed is pushed forward on the track 4 by a thrust mechanism 2. Specifically, the clamping mechanism 1 is fixedly connected to the thrust mechanism 2 by a first connecting member 15 and a second connecting member 22, and the thrust mechanism 2 is fixedly connected to the device to be pushed by a third connecting member 23 and a connecting portion 31 of the device to be pushed. The clamping mechanism 1 is used to drive the two ends of the first driving member 13 to extend through a first driver, and the two ends of the first driving member 13 extend to drive the two clamping members 12 to rotate, so that the bottoms of the two clamping members 12 gradually approach each other until the track 4 is clamped. And, the thrust mechanism 2 is used to drive the telescopic end of the second driving member 21 to extend through a second driver when the clamping mechanism 1 clamps the track 4, so as to push the device to be pushed forward on the track 4. Among them, the walking part 14 may include walking wheels for guiding and supporting.

[0032] After the device to be pushed is moved forward, the clamping mechanism 1 drives the two ends of the first driving member 13 to retract through the first driver, and the retracted two ends of the first driving member 13 drive the two clamping members 12 to rotate, so that the bottoms of the two clamping members 12 gradually move away from each other, and the track 4 is released; the pushing mechanism 2 drives the telescopic end of the second driving member 21 to retract through the second driver, and the retracted extended end of the second driving member 21 drives the pushing mechanism 2 and the clamping mechanism 1 to move forward on the track 4. That is, the device to be pushed can be pushed forward multiple times by clamping and releasing the track 4 by the clamping mechanism 1 and extending and retracting the pushing mechanism 2.

[0033] In an optional embodiment, the control mechanism includes a clamping control part and a pushing control part. The clamping control part is used to control the first driver to drive the extension and retraction of both ends of the first driving member 13, and the clamping control part is used to control the second driver to drive the extension and retraction of the second driving member 21.

[0034] Optionally, the clamping control unit includes a first starting circuit and a first control circuit. Figure 8 As shown, both ends of the first start-up circuit are connected to the power supply, including a first relay KA1 and a second switch SB2 connected in series; the first start-up circuit also includes a first contactor KM1, which is connected in series with the first normally open contact KA11 of the first relay KA1 and then connected to the power supply, and the first driver is connected in series with the normally open contact of the first contactor KM1 and then connected to the power supply. The first start-up circuit is used to control the start-up of the first driver, and specifically, the first start-up circuit can be turned on by controlling the second switch SB2 to close. At this time, the first relay KA1 is energized, the first normally open contact KA11 of the first relay KA1 is closed, and then the first contactor KM1 is energized, and the normally open contact of the first contactor KM1 is closed, so that the first driver is energized and started.

[0035] In addition, the first end of the first control circuit is connected to the power supply, and the second end is connected between the first relay KA1 and the second switch SB2; the first control circuit includes a second relay KA2 and a third switch SB3 connected in series; a first electromagnetic reversing valve 17 is connected between the first driver and the first driving member 13, and the first valve position YV1 of the first electromagnetic reversing valve 17 is connected in series with the third normally open contact KA21 of the second relay KA2 and then connected to the power supply.

[0036] In addition, the first control circuit also includes a third relay KA3 and a fourth switch SB4, which are connected in series and in parallel at both ends of the second relay KA2 and the third switch SB3 connected in series; the second valve position YV2 of the first solenoid reversing valve 17 is connected in series with the fifth normally open contact KA31 of the third relay KA3 and then connected to the power supply.

[0037] The first control circuit is used to control the extension and retraction of the two ends of the first drive member 13. After the second switch SB2 is closed to turn on the first start circuit, the first control circuit can be turned on by controlling the third switch SB3 to be closed. At this time, the second relay KA2 is energized, and the third normally open contact KA21 of the second relay KA2 is closed, thereby energizing the first valve position YV1 of the first electromagnetic reversing valve 17 and extending the two ends of the first drive member 13. In addition, the third relay KA3 can be energized by controlling the fourth switch SB4 to be closed, and the fifth normally open contact KA31 of the third relay KA3 is closed, thereby energizing the second valve position YV2 of the first electromagnetic reversing valve 17 and retracting the two ends of the first drive member 13.

[0038] Optionally, the first normally closed contact KA23 of the second relay KA2 is connected in series between the third relay KA3 and the fourth switch SB4, and the second normally closed contact KA33 of the third relay KA3 is connected in series between the second relay KA2 and the third switch SB3. That is, when the second relay KA2 is energized, its first normally closed contact KA23 is disconnected, so that the third relay KA3 cannot be energized; when the third relay KA3 is energized, its second normally closed contact KA33 is disconnected, so that the second relay KA2 cannot be energized, so that only one of the first valve position YV1 and the second valve position YV2 of the first electromagnetic reversing valve 17 can be energized, which facilitates the precise control of the extension and retraction of the two ends of the first driving member 13.

[0039] Furthermore, a fifth switch SB5 is connected in series in the first control circuit, and the on-off of the first control circuit can be controlled by controlling the on-off of the fifth switch SB5. That is, when the first control circuit is turned on to enable the first valve position YV1 or the second valve position YV2 of the first solenoid reversing valve 17 to be energized, the fifth switch SB5 can be used to control the first control circuit to be disconnected, so that the first solenoid reversing valve 17 returns to the center position, thereby facilitating the control switching of the first drive member 13 between extension and retraction.

[0040] In addition, a first switch SB1 is connected in series in the first starting circuit, and the on and off of the first starting circuit can be controlled by controlling the on and off of the first switch SB1. Here, when the first starting circuit is disconnected, the first control circuit will also be disconnected, that is, the first switch SB1 is equivalent to the main switch of the entire clamping control part, and the clamping mechanism 1 can be controlled to stop running by controlling the first switch SB1 to be disconnected.

[0041] Optionally, the first switch SB1 to the fifth switch SB5 can all be set as push button switches; and the second normally open contact KA12 of the first relay KA1 is connected in parallel to both ends of the second switch SB2; the fourth normally open contact KA22 of the second relay KA2 is connected in parallel to both ends of the third switch SB3; the sixth normally open contact KA32 of the third relay KA3 is connected in parallel to both ends of the fourth switch SB4. The normally open contacts of the three relays are connected in parallel to both ends of the three switches respectively, so that when the push button switch is disconnected, the three normally open contacts can be closed to keep the circuit conductive, thereby realizing the self-locking function.

[0042] In actual application scenarios, the clamping control unit may also include a power supply component, which is connected to a power supply and is used to convert the alternating current of a power supply (such as a power grid) into direct current; the two ends of the first starting circuit are respectively connected to the positive and negative output ends of the power supply component.

[0043] Furthermore, a current limiting protection device may be connected to the first starting circuit for overload current limiting protection. For example, a thermal relay FR1 is connected between the first driver and the power supply, and a normally closed contact FR11 of the thermal relay FR1 is connected in the first starting circuit; for another example, a fuse FU1 is connected in series in the connection line between the first contactor KM1 and the power supply, and a fuse FU2 is connected in series in the first starting circuit.

[0044] Optionally, the push control unit includes a second starting circuit and a second control circuit. Fig. 9 As shown, both ends of the second starting circuit are connected to the power supply, including the fourth relay KA4 and the seventh switch SB7 connected in series; the second starting circuit also includes a second contactor KM2, which is connected in series with the seventh normally open contact KA41 of the fourth relay KA4 and then connected to the power supply, and the second driver is connected in series with the normally open contact of the second contactor KM2 and then connected to the power supply. The second starting circuit is used to control the start of the second driver, and specifically, the second starting circuit can be turned on by controlling the seventh switch SB7 to close. At this time, the fourth relay KA4 is energized, the seventh normally open contact KA41 of the fourth relay KA4 is closed, and then the second contactor KM2 is energized, and the normally open contact of the second contactor KM2 is closed, so that the second driver is energized and started.

[0045] In addition, the first end of the second control circuit is connected to the power supply, and the second end is connected between the fourth relay KA4 and the seventh switch SB7; the second control circuit includes a fifth relay KA5 and an eighth switch SB8 connected in series; a second electromagnetic reversing valve 24 is connected between the second driver and the second driving member 21, and the third valve position YV3 of the second electromagnetic reversing valve 24 is connected in series with the ninth normally open contact KA51 of the fifth relay KA5 and then connected to the power supply.

[0046] In addition, the second control circuit also includes a sixth relay KA6 and a ninth switch SB9, which are connected in series and then connected in parallel at both ends of the fifth relay KA5 and the eighth switch SB8 connected in series; the fourth valve position YV4 of the second solenoid reversing valve 24 is connected in series with the eleventh normally open contact KA61 of the sixth relay KA6 and then connected to the power supply.

[0047] The second control circuit is used to control the extension and retraction of the telescopic end of the second driving member 21. After the seventh switch SB7 is closed to connect the second start circuit, the second control circuit can be connected by controlling the eighth switch SB8 to be closed. At this time, the fifth relay KA5 is energized, and the ninth normally open contact KA51 of the fifth relay KA5 is closed, thereby energizing the third valve position YV3 of the second electromagnetic reversing valve 24 and extending the telescopic end of the second driving member 21. In addition, the sixth relay KA6 can be energized by controlling the ninth switch SB9 to be closed, and the eleventh normally open contact KA61 of the sixth relay KA6 is closed, thereby energizing the fourth valve position YV4 of the second electromagnetic reversing valve 24 and retracting the telescopic end of the second driving member 21.

[0048] Optionally, the third normally closed contact KA53 of the fifth relay KA5 is connected in series between the sixth relay KA6 and the ninth switch SB9, and the fourth normally closed contact KA63 of the sixth relay KA6 is connected in series between the fifth relay KA5 and the eighth switch SB8. That is, when the fifth relay KA5 is energized, its third normally closed contact KA53 is disconnected, so that the sixth relay KA6 cannot be energized; when the sixth relay KA6 is energized, its fourth normally closed contact KA63 is disconnected, so that the fifth relay KA5 cannot be energized, so that only one of the third valve position YV3 and the fourth valve position YV4 of the second electromagnetic reversing valve 24 can be energized, which is convenient for accurately controlling the extension and retraction of the extension end of the first drive member 13.

[0049] Furthermore, a tenth switch SB10 is connected in series in the second control circuit, and the on-off of the second control circuit can be controlled by controlling the on-off of the tenth switch SB10. That is, when the second control circuit is turned on to enable the third valve position YV3 or the fourth valve position YV4 of the second solenoid reversing valve 24 to be energized, the tenth switch SB10 can be used to control the second control circuit to be disconnected, so that the second solenoid reversing valve 24 returns to the center position, thereby facilitating the control switching of the second drive member 21 between extension and retraction.

[0050] In addition, a sixth switch SB6 is connected in series in the second starting circuit, and the on and off of the second starting circuit can be controlled by controlling the on and off of the sixth switch SB6. Here, when the second starting circuit is disconnected, the second control circuit will also be disconnected, that is, the sixth switch SB6 is equivalent to the main switch of the entire pushing control part, and the pushing mechanism 2 can be controlled to stop running by controlling the sixth switch SB6 to be disconnected.

[0051] Optionally, the first switch SB6 to the fifth switch SB10 can all be set as push button switches; and the eighth normally open contact KA42 of the fourth relay KA4 is connected in parallel to the two ends of the seventh switch SB7; the tenth normally open contact KA52 of the fourth relay KA4 is connected in parallel to the two ends of the eighth switch SB8; the twelfth normally open contact KA62 of the sixth relay KA6 is connected in parallel to the two ends of the ninth switch SB9. The normally open contacts of the three relays are connected in parallel to the two ends of the three switches respectively, so that when the push button switch is disconnected, the three normally open contacts can be closed to keep the circuit conductive, thereby realizing the self-locking function.

[0052] In actual application scenarios, the push control unit may also include a power supply component, which is connected to a power supply and is used to convert the alternating current of a power supply (such as a power grid) into direct current; the two ends of the second starting circuit are respectively connected to the positive and negative output ends of the power supply component.

[0053] Furthermore, a current limiting protection device may be connected to the second starting circuit for overload current limiting protection. For example, a thermal relay FR2 is connected between the second driver and the power supply, and a normally closed contact FR21 of the thermal relay FR2 is connected in the second starting circuit; for another example, a fuse FU3 is connected in series in the connection line between the second contactor KM2 and the power supply, and a fuse FU4 is connected in series in the first starting circuit.

[0054] In an optional embodiment, the first drive and / or the second drive comprises an electric pump ( Figures 6 to 9 M3 shown in the figure), the first driving member 13 and / or the second driving member 21 include a hydraulic cylinder. The functions of the clamping mechanism 1 and the pushing mechanism 2 of the shield machine pushing device of the embodiment of the present invention are realized by an electric hydraulic mechanism composed of an electric pump and a hydraulic cylinder, which can provide sufficient power for the clamping mechanism 1 and the pushing mechanism 2 at a relatively low cost. For example, the first driving member 13 can adopt a hydraulic cylinder with a load of 40t (55Mpa), so that the two clamping members 12 of the clamping mechanism 1 can amplify the clamping pressure to 80t, provide a friction force of more than 25t, and meet the fixing function of the clamping mechanism 1.

[0055] Optionally, in the thrust device for a shield machine, a guide rail seat (not shown in the figure) is further provided at the bottom of the main body 11, the guide rail seat cooperates with the guide rail used by the device to be thrusted, and the guide rail seat is located in the middle of the two clamping members 12; the two clamping members 12 are provided with clamping feet 16 that cooperate with the track 4 at the bottom, which is used to facilitate the two clamping members 12 to clamp the track 4. Here, the guide rail used by the device to be thrusted may include a square track 4, an I-shaped track 4, etc. By setting the guide rail seat and the clamping feet 16 to a structure that cooperates with various types of tracks 4, the thrust device for a shield machine according to the embodiment of the present invention can be applied to shield machine assembly scenarios on different tracks 4.

[0056] According to an exemplary embodiment of the present invention, when the jacking device for a shield machine is used for the forward movement of the shield machine on the track 4, at least two groups of clamping mechanisms 1 and jacking mechanisms 2 can be set according to the number of tracks 4 used by the jacking equipment, and one group of clamping mechanisms 1 and jacking mechanisms 2 is set on each track 4. The control mechanism controls the multiple groups of clamping mechanisms 1 to perform clamping actions synchronously, and controls the multiple groups of jacking mechanisms 2 to perform jacking actions synchronously, that is, the control mechanism is used to control the two ends of the first driving members 13 of the multiple groups of clamping mechanisms 1 to be retracted and extended synchronously, and to control the retractable ends of the second driving members 21 of the multiple groups of jacking mechanisms to be retracted and extended synchronously.

[0057] Optionally, the multiple clamping mechanisms 1 include a first driver, and the control mechanism is used to control the first driver to synchronously drive the two ends of the multiple first driving members 13 to be synchronously extended and retracted; the multiple pushing mechanisms 2 include a second driver, and the control mechanism is also used to control the second driver to synchronously drive the retractable ends of the multiple second driving members 21 to be synchronously extended and retracted. That is, in order to save costs, the multiple clamping mechanisms 1 can use the same first driver, and the first driver can provide power to the multiple first driving members 13 at the same time, and synchronously drive the extension and retraction of the two ends of the multiple first driving members 13. And, the multiple pushing mechanisms 2 can use the same second driver, and the second driver can provide power to the multiple second driving members 21 at the same time, and synchronously drive the extension and retraction of the retractable ends of the multiple second driving members 21.

[0058] Here, multiple first driving members 13 can be connected to the first driver through the first electromagnetic reversing valve 17, and multiple second driving members 21 can be connected to the second driver through the second electromagnetic reversing valve 24. The start of the first driver and the second driver can be controlled by turning on and off the first starting circuit and the second starting circuit in the control mechanism. The synchronous extension and retraction of the two ends of the multiple first driving members 13 and the synchronous extension and retraction of the extension ends of the multiple second driving members 21 can be controlled by turning on and off the first control circuit and the second control circuit. In addition, the first driver or the second driver (such as an electric pump) can be independently provided and connected to the first driver or the second driver through a pipeline line, without the need to provide the first driver on the main body 11, and without the need to fix the second driver and the second driver 22 together.

[0059] When the shield machine push device according to the embodiment of the present invention is used to move the shield machine forward on the track 4, the following operation process can be adopted:

[0060] 1. Press the second switch SB2 to energize the first relay KA1 and the first contactor KM1, thereby starting the first driver; press the third switch SB3 to energize the first valve position YV1 of the first electromagnetic reversing valve 17, thereby extending both ends of the first driving member 13 (for example, oil enters the rodless chamber of the hydraulic cylinder, and the cylinder extends), and the two clamping members 12 clamp the clamping feet 16 at the bottom to tighten the track 4.

[0061] 2. After clamping the track 4, press the seventh switch SB7 to energize the fourth relay KA4 and the second contactor KM2, thereby starting the second driver; press the eighth switch SB8 to energize the first valve position YV1 of the second solenoid reversing valve 24, thereby extending the telescopic end of the second drive member 21 and pushing the equipment to be pushed forward on the track 4.

[0062] 3. After the forward movement is completed, press the fifth switch SB5 to return the first electromagnetic reversing valve 17 to the middle position; press the tenth switch SB10 to return the second electromagnetic reversing valve 24 to the middle position.

[0063] 4. Press the fourth switch SB4 to energize the second valve position YV2 of the first electromagnetic reversing valve 17, thereby retracting both ends of the first driving member 13 (for example, the hydraulic cylinder is depressurized and the cylinder is retracted), and the clamping feet 16 at the bottom of the two clamping members 12 release the track 4.

[0064] 5. Press the eighth switch SB8 to energize the second valve position YV2 of the second electromagnetic reversing valve 24, thereby retracting the telescopic end of the second driving member 21 and driving the clamping mechanism 1 to move forward.

[0065] 6. Repeat the above steps 1-5 for several times to complete the forward movement of the device to be pushed, and press the first switch SB1 and the tenth switch SB10 to stop the first driver and the second driver.

[0066] A pushing device for a shield machine in an embodiment of the present invention is provided with a clamping mechanism and a pushing mechanism. A control mechanism is used to control the first driver of the clamping mechanism to drive the two ends of the first driving member to extend, thereby driving the bottom clamping tracks of the two clamping members to achieve a fixing effect; and a control mechanism is used to control the second driver of the pushing mechanism to drive the telescopic end of the second driving member to extend, thereby pushing the equipment to be pushed forward on the track; the retraction of the first driving member can also drive the two clamping members to loosen the track, and the retraction of the second driving member can drive the clamping mechanism to move forward, thereby completing the forward movement of the equipment to be pushed on the track, which can meet the power requirements for the forward movement of heavier and large shield machines, and is simple to operate and highly efficient.

[0067] It should be noted that, according to implementation needs, the various components described in the embodiments of the present invention may be split into more components, or two or more components or parts of components may be combined into a new component to achieve the purpose of the embodiments of the present invention.

[0068] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A thrust device for a shield machine, characterized in that: The thrust device for a shield machine comprises a clamping mechanism (1), a thrust mechanism (2) and a control mechanism; The clamping mechanism (1) comprises a main body (11), a first driving part and two clamping members (12), the first driving part comprising a first driver and a first driving member (13) with retractable ends, the first driving member (13) and the two clamping members (12) being fixedly arranged on the main body (11), the two clamping members (12) being located at the two ends of the first driver, the two ends of the first driving member (13) being hinged to the tops of the two clamping members (12) respectively; the two clamping members (12) being rotatable around their middle positions, and when the two ends of the first driving member (13) are extended, the bottoms of the two clamping members (12) gradually approach each other; a walking part (14) is arranged at the bottom of the main body (1), and a first connecting member (15) is arranged at the front end of the main body (1); The pushing mechanism comprises a second driving part, the second driving part comprises a second driver and a second driving member (21), the first end of the second driving member (21) is provided with a second connecting member (22), the second connecting member (22) cooperates with the first connecting member (15); the second end is retractable, and the end is provided with a third connecting member (23), the third connecting member (23) cooperates with the connecting part (31) of the device to be pushed; The control mechanism comprises a clamping control part and a pushing control part, the clamping control part is used to control the first driver to drive the extension and retraction of the two ends of the first driving member (13), and the pushing control part is used to control the second driver to drive the extension and retraction of the second driving member (21); The clamping control unit comprises a first starting circuit and a first control circuit; both ends of the first starting circuit are connected to a power supply, and include a first relay (KA1) and a second switch (SB2) connected in series; the first starting circuit also includes a first contactor (KM1), the first contactor (KM1) is connected in series with a first normally open contact of the first relay (KA1) and then connected to the power supply, and the first driver is connected in series with the normally open contact of the first contactor (KM1) and then connected to the power supply; the first end of the first control circuit is connected to the power supply, and the second end is connected between the first relay (KA1) and the second switch (SB2); the first control circuit includes a second relay (KA2) and a third switch (SB3) connected in series; a first electromagnetic reversing valve (17) is connected between the first driver and the first driving member (13), and the first valve position of the first electromagnetic reversing valve (17) is connected in series with the third normally open contact of the second relay (KA2) and then connected to the power supply; The push control unit comprises a second starting circuit and a second control circuit; both ends of the second starting circuit are connected to a power supply, and include a fourth relay (KA4) and a seventh switch (SB7) connected in series; the second starting circuit also includes a second contactor (KM2), the second contactor (KM2) is connected in series with the seventh normally open contact of the fourth relay (KA4) and then connected to the power supply, and the second driver is connected in series with the normally open contact of the second contactor (KM2) and then connected to the power supply; the first end of the second control circuit is connected to the power supply, and the second end is connected between the fourth relay (KA4) and the seventh switch (SB7); the second control circuit includes a fifth relay (KA5) and an eighth switch (SB8) connected in series; a second electromagnetic reversing valve (24) is connected between the second driver and the second driving member (21), and the third valve position of the second electromagnetic reversing valve (24) is connected in series with the ninth normally open contact of the fifth relay (KA5) and then connected to the power supply.

2. A thrust device for a shield machine according to claim 1, characterized in that: The first control circuit further comprises a third relay (KA3) and a fourth switch (SB4), wherein the third relay (KA3) and the fourth switch (SB4) are connected in series and then connected in parallel to two ends of the second relay (KA2) and the third switch (SB3) connected in series; The second valve position of the first electromagnetic reversing valve (17) is connected in series with the fifth normally open contact of the third relay (KA3) and then connected to the power supply; The first normally closed contact (KA23) of the second relay (KA2) is connected in series between the third relay (KA3) and the fourth switch (SB4), and the second normally closed contact (KA33) of the third relay (KA3) is connected in series between the second relay (KA2) and the third switch (SB3).

3. A thrust device for a shield machine according to claim 1, characterized in that: The second control circuit further comprises a sixth relay (KA6) and a ninth switch (SB9), wherein the sixth relay (KA6) and the ninth switch (SB9) are connected in series and then connected in parallel to two ends of the fifth relay (KA5) and the eighth switch (SB8) connected in series; The fourth valve position of the second electromagnetic reversing valve (24) is connected in series with the eleventh normally open contact of the sixth relay (KA6) and then connected to a power source; the third normally closed contact of the fifth relay (KA5) is connected in series between the sixth relay (KA6) and the ninth switch (SB9), and the fourth normally closed contact of the sixth relay (KA6) is connected in series between the fifth relay (KA5) and the eighth switch (SB8).

4. A thrust device for a shield machine according to claim 1, characterized in that: The first drive and / or the second drive comprises an electric pump, and the first drive member (13) and / or the second drive member (21) comprises a hydraulic cylinder.

5. The thrust device for a shield machine according to claim 1, characterized in that: A guide rail seat is provided at the bottom of the main body (11), and the guide rail seat cooperates with the rail (4) used by the device to be pushed. The guide rail seat is located in the middle of two clamping members (12), and clamping feet (16) that cooperate with the rail (4) are provided at the bottom of the two clamping members (12).

6. A thrust device for a shield machine according to any one of claims 1 to 5, characterized in that: The thrust device for a shield machine comprises at least two groups of clamping mechanisms (1) and thrust mechanisms (2), and the control mechanism is used to control the synchronous extension and retraction of both ends of a first driving member (13) of the at least two groups of clamping mechanisms (1), and to control the synchronous extension and retraction of the telescopic end of a second driving member (21) of the at least two groups of thrust mechanisms (2).

7. A thrust device for a shield machine according to claim 6, characterized in that: The at least two groups of clamping mechanisms (1) include a first driver, and the control mechanism is used to control the first driver to synchronously drive the two ends of at least two first driving members (13) to synchronously extend and retract; the at least two groups of pushing mechanisms (2) include a second driver, and the control mechanism is also used to control the second driver to synchronously drive the telescopic ends of at least two second driving members (21) to synchronously extend and retract.

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