Pin device, hydraulic system and control method of a caisson tunneling machine

Abstract

The present application relates to a pin device, a hydraulic system and a control method for a caisson tunneling machine. The pin device includes: a pin cylinder, a movable support seat, and a pin; the cylinder barrel of the pin cylinder is connected to the movable support seat, and the piston rod of the pin cylinder is connected to the pin; the movable support seat is fixedly connected to the support beam of the tunneling machine; a groove is provided on one side of the middle part of the pin; when the tunneling machine needs to be lifted, the piston rod can drive the pin to pull outwards until the groove of the pin is located below the convex block of the fixed seat on the bottom platform of the caisson and then stop. Since the groove is provided in the middle part of the pin, the pin only needs to be pulled out by half of its length, and then the tunneling machine can be controlled to drive the movable support seat to lift upwards, greatly improving the lifting efficiency of the tunneling machine. Moreover, neither a lifting cylinder needs to be provided nor a support foot needs to be provided at the bottom of the lifting cylinder, nor bolts need to be used for fixation. It does not increase the requirements for the sealing and pressure maintaining performance of the pin cylinder, and the operation is convenient and efficient.

Description

Technical Field

[0001] This application belongs to the technical field of caisson tunneling, and particularly relates to a pin device, a hydraulic system and a control method of a caisson tunneling machine. Background Art

[0002] At present, a caisson tunneling machine generally conducts tunneling work inside a caisson. During the working process, the main machine is supported inside the caisson through a support mechanism. When the tunneling machine breaks down and needs to be repaired, it is not convenient for maintenance personnel to go down the well for repair, and there are potential safety hazards. Therefore, when the caisson tunneling machine needs to be repaired, it is necessary to control the main machine of the tunneling machine to be lifted upwards to the ground.

[0003] In the prior art, one way to support the main machine is to rely on a lifting platform to support on the precast convex platform on the well wall, and cooperate with positioning blocks at the support feet for support and positioning. However, this method sets the support feet at the bottom of the lifting oil cylinder, and adjusts through the feedback of the stroke sensor to make the main machine in a horizontal state, resulting in the pin oil cylinder always bearing a large gravity, which puts forward high requirements for the sealing and pressure maintaining performance of the pin oil cylinder; another way is to match the caisson structure with the limiting convex columns in the concrete protective sleeve through an annular card slot, and support and position it by means of bolt fixation. When the tunneling machine breaks down and needs to be lifted upwards to the ground, it is necessary to manually disassemble the bolts first, and the disassembly operation is rather troublesome. Summary of the Invention

[0004] The purpose of this application is to provide a pin device for a caisson tunneling machine; the pin device for a caisson tunneling machine provided by this application neither needs to set a lifting oil cylinder and support feet at the bottom of the lifting oil cylinder, nor needs to use bolts for fixation, does not increase the requirements for the sealing and pressure maintaining performance of the pin oil cylinder, and is convenient and efficient to operate.

[0005] The technical solution provided by this application is as follows:

[0006] A pin device for a caisson tunneling machine, comprising: a pin oil cylinder, a movable support seat, and a pin;

[0007] The cylinder barrel of the pin oil cylinder is connected to the movable support seat, and the piston rod of the pin oil cylinder is connected to the pin;

[0008] The movable support seat is fixedly connected to the support beam of the tunneling machine;

[0009] A groove is arranged on one side of the middle part of the pin;

[0010] When the tunneling machine needs to be lifted, the piston rod can drive the pin to pull outwards until the groove of the pin is located below the convex block of the fixed seat on the bottom platform of the caisson and then stops, so that the tunneling machine can drive the movable support seat to continue to lift upwards.

[0011] Preferably, it further includes: a latch guide rod, and a latch guide cavity corresponding to the latch guide rod;

[0012] The latch guide cavity is arranged in the movable support seat;

[0013] The piston rod of the latch cylinder is connected to the latch through a connecting member. One end of the latch is fixedly connected to the connecting member, and the middle of the piston rod is connected to the connecting member;

[0014] The other end of the latch guide rod is fixedly connected to the connecting member.

[0015] Preferably, it further includes: a sliding wheel;

[0016] The sliding wheel is fixedly arranged on one side of the movable support seat. When the movable support seat is lifted upward, the sliding wheel slides upward along the sliding groove on the segment of the open caisson.

[0017] The present application also provides a hydraulic system for an open caisson tunneling machine, including: a latch cylinder, an electromagnetic directional control valve, a hydraulic pump, an oil tank, and a motor;

[0018] The motor is connected to the hydraulic pump, and the motor is used to provide a power source for the hydraulic pump;

[0019] The oil inlet of the hydraulic pump is communicated with the oil tank;

[0020] The P port of the electromagnetic directional control valve is communicated with the oil outlet of the hydraulic pump;

[0021] The T port of the electromagnetic directional control valve is communicated with the oil tank;

[0022] The rodless cavity of the latch cylinder is communicated with the A port of the electromagnetic directional control valve, and the rod chamber of the latch cylinder is communicated with the B port of the electromagnetic directional control valve;

[0023] When the right position of the electromagnetic directional control valve is energized, the P port and the A port of the electromagnetic directional control valve are communicated, and the B port and the T port of the electromagnetic directional control valve are communicated;

[0024] When the left position of the electromagnetic directional control valve is energized, the P port and the B port of the electromagnetic directional control valve are communicated, and the A port and the T port of the electromagnetic directional control valve are communicated.

[0025] Preferably, it further includes:

[0026] A balance valve group;

[0027] The balance valve group includes two sets of balance valves. One set of balance valves is respectively connected to the A oil port of the electromagnetic directional control valve and the rodless cavity of the pin cylinder, and the other set of balance valves is respectively connected to the B oil port of the electromagnetic directional control valve and the rod cavity of the pin cylinder.

[0028] Preferably, it further includes:

[0029] An accumulator, an electromagnetic ball valve, and a manual directional control valve;

[0030] The accumulator is connected to the P oil port of the manual directional control valve through the electromagnetic ball valve;

[0031] The accumulator is also connected to the P oil port of the electromagnetic directional control valve through the electromagnetic ball valve;

[0032] The T oil port of the manual directional control valve is connected to the oil tank;

[0033] The A oil port of the manual directional control valve is connected to the rodless cavity of the pin cylinder;

[0034] The B oil port of the manual directional control valve is connected to the rod cavity of the pin cylinder.

[0035] Preferably, it further includes:

[0036] A first pilot-operated check valve and a second pilot-operated check valve;

[0037] The A oil port of the manual directional control valve is connected to the first oil port of the first pilot-operated check valve;

[0038] The second oil port of the first pilot-operated check valve is connected to the rodless cavity of the pin cylinder;

[0039] The control oil port of the first pilot-operated check valve is connected to the B oil port of the manual directional control valve;

[0040] The B oil port of the manual directional control valve is also connected to the first oil port of the second pilot-operated check valve;

[0041] The second oil port of the second pilot-operated check valve is connected to the rod cavity of the pin cylinder;

[0042] The control oil port of the second pilot-operated check valve is connected to the A oil port of the manual directional control valve.

[0043] Preferably, it further includes:

[0044] An oil suction filter, a check valve, and a relief valve;

[0045] The inlet port of the oil suction filter is connected to the oil tank;

[0046] The outlet port of the oil suction filter is connected to the inlet port of the hydraulic pump;

[0047] The inlet port of the one-way valve is communicated with the outlet port of the hydraulic pump;

[0048] The outlet port of the one-way valve is respectively communicated with the P port of the electromagnetic directional valve and the P port of the manual directional valve;

[0049] The overflow valve is connected in parallel to the outlet port of the one-way valve.

[0050] Preferably, it further includes:

[0051] A controller and a stroke sensor;

[0052] The stroke sensor is connected to the controller. When the piston rod of the pin cylinder extends outwards to a first preset position detected by the stroke sensor, the stroke sensor sends a first signal to the controller, and the controller controls the roadheader to lift upwards based on the first signal.

[0053] Preferably, it further includes:

[0054] A weighing sensor;

[0055] The controller is respectively connected to the weighing sensor and the electromagnetic directional valve;

[0056] When the movable support seat touches the bottom platform of the caisson, the weighing sensor outputs a second signal to the controller, and the controller controls the left position of the electromagnetic directional valve to be energized based on the second signal, so that the piston rod drives the pin to insert inwards until both ends of the pin are located below the two bumps of the fixed seat and then stops.

[0057] This application also provides a pin control method for a caisson roadheader, which is applied to the hydraulic system of the above-mentioned caisson roadheader. The method includes:

[0058] When the roadheader needs to be lifted, the controller controls the right position of the electromagnetic directional valve to be energized, so that the piston rod of the pin cylinder drives the pin to pull outwards;

[0059] The controller obtains the first signal output by the stroke sensor and controls the roadheader to lift upwards based on the first signal, where the first signal is output by the stroke sensor when it detects that the piston rod extends outwards to the first preset position.

[0060] Preferably, the method further includes:

[0061] The controller obtains the second signal output by the weighing sensor and controls the left position of the electromagnetic directional valve to be energized based on the second signal, so that the piston rod drives the pin to insert inwards, and the second signal is output by the weighing sensor when the movable support seat touches the bottom platform of the caisson;

[0062] The controller obtains a third signal output by the stroke sensor, and controls the tunnel boring machine to stop lowering based on the third signal, wherein the third signal is output when the stroke sensor detects that the piston rod is inserted inwardly to a second preset position.

[0063] Compared with the prior art, the present application provides a latch device for a caisson boring machine, comprising: a latch cylinder, a movable support seat, and a latch; the cylinder barrel of the latch cylinder is connected to the movable support seat, and the piston rod of the latch cylinder is connected to the latch; the movable support seat is fixedly connected to the support beam of the boring machine; a groove is provided on one side of the middle part of the latch; when the boring machine needs to be lifted, the piston rod can drive the latch to disengage outward until the groove of the latch is located below the protrusion of the fixed seat on the bottom platform of the caisson and then stops, so that the boring machine can drive the movable support seat to continue to lift upward. In the present application, since the groove is provided in the middle part of the latch, the latch only needs to be disengaged by half the length to control the boring machine to drive the movable support seat to lift upward, which greatly improves the lifting efficiency of the boring machine. The latch device does not require the setting of a lifting cylinder and a supporting foot at the bottom of the lifting cylinder, nor does it require the use of bolts for fixing, does not increase the requirements for the sealing and pressure maintaining performance of the latch cylinder, and is easy and efficient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the embodiments of the present application 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0065] Figure 1 A schematic diagram of a top view of a latch device of a caisson boring machine disclosed in an embodiment of the present application in a latch fixing state;

[0066] Figure 2 A first top view structural schematic diagram of a latch device of a caisson boring machine disclosed in an embodiment of the present application, in which a latch is in a disengaged state;

[0067] Figure 3 A second top view structural schematic diagram of a latch device of a caisson boring machine disclosed in an embodiment of the present application, in which a latch is in a disengaged state;

[0068] Figure 4 A first structural schematic diagram of a hydraulic system of a caisson boring machine disclosed in an embodiment of the present application;

[0069] Figure 5 A second structural schematic diagram of a hydraulic system of a caisson boring machine disclosed in an embodiment of the present application;

[0070] Figure 6 This is a flowchart of a pin control method for a caisson tunneling machine disclosed in an embodiment of the present application;

[0071] Reference numerals: 1 - pin cylinder; 2 - cylinder barrel; 3 - piston rod; 4 - movable support seat; 5 - pin; 6 - groove; 7 - electromagnetic directional control valve; 8 - weighing sensor; 9 - balance valve group; 10 - fixed seat; 11 - convex block; 12 - pin guide rod; 13 - pin guide cavity; 14 - connecting piece; 15 - stroke sensor; 16 - sliding wheel; 17 - accumulator; 18 - electromagnetic ball valve; 191 - first pilot-operated check valve; 192 - second pilot-operated check valve; 20 - manual directional control valve; 21 - hydraulic pump; 22 - motor; 23 - fuel tank; 24 - suction filter; 25 - check valve; 26 - relief valve. Detailed implementation manners

[0072] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0073] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0074] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application.

[0075] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meanings of "a plurality" and "several" are two or more, unless otherwise specifically defined.

[0076] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0077] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a latch device for a caisson boring machine, comprising: a latch cylinder 1, a movable support seat 4, and a latch 5; the cylinder barrel 2 of the latch cylinder 1 is connected to the movable support seat 4, and the piston rod 3 of the latch cylinder 1 is connected to the latch 5; the movable support seat 4 is fixedly connected to the support beam of the boring machine; a groove 6 is provided on one side of the middle part of the latch 5; when the boring machine needs to be lifted, the piston rod 3 can drive the latch 5 to disengage outward until the groove 6 of the latch 5 is located below the protrusion 11 of the fixed seat 10 on the bottom platform of the caisson and then stops, so that the boring machine can drive the movable support seat 4 to continue to lift upward.

[0078] In this embodiment, the bottom of the caisson is a platform, and the fixed seat 10 is fixedly arranged on the platform. When the tunnel boring machine is lowered into place, the bottom of the movable support seat 4 contacts the platform, and the tunnel boring machine is supported underground by multiple fixed seats 10 evenly distributed on the circumference of the platform. When the tunnel boring machine needs to be lifted, the right position of the electromagnetic reversing valve 7 can be controlled to be energized. After the right position of the electromagnetic reversing valve 7 is energized, the piston rod 3 can be extended, and at the same time, the piston rod 3 drives the pin 5 to be disengaged outward until the groove 6 of the pin 5 is located under one of the protrusions 11 of the fixed seat 10 and then stops, so that the pin 5 is not blocked by the protrusion 11 of the fixed seat 10, and then the movable support seat 4 can drive the tunnel boring machine to continue to lift upward.

[0079] In this embodiment, the latch 5 is a wedge-shaped latch, which can effectively reduce the probability of the latch 5 getting stuck during its extension and retraction; the movable support seat 4 and the latch 5 are connected by earrings, and the cylinder barrel 2 of the latch cylinder 1 is connected to the movable support seat 4 by earrings.

[0080] Compared with the prior art, a pin device of a caisson tunneling machine provided by the present application includes: a pin cylinder 1, a movable support seat 4, and a pin 5; the cylinder barrel 2 of the pin cylinder 1 is connected to the movable support seat 4, and the piston rod 3 of the pin cylinder 1 is connected to the pin 5; the movable support seat 4 is fixedly connected to the support beam of the tunneling machine; a groove 6 is provided on one side of the middle of the pin 5; when the tunneling machine needs to be lifted, the piston rod 3 can drive the pin 5 to pull outwards until the groove 6 of the pin 5 is located below the convex block 11 of the fixed seat 10 on the bottom platform of the caisson and then stops, so that the tunneling machine can drive the movable support seat 4 to continue to lift upwards. In the present application, since the groove 6 is provided in the middle of the pin 5, the pin 5 only needs to be pulled out by half of its length, and then the tunneling machine can be controlled to drive the movable support seat 4 to lift upwards, greatly improving the lifting efficiency of the tunneling machine. Moreover, this pin device neither needs to be provided with a lifting cylinder and support feet at the bottom of the lifting cylinder, nor needs to be fixed with bolts, does not increase the requirements for the sealing and pressure maintaining performance of the pin cylinder 1, and is convenient and efficient to operate.

[0081] As Figure 3 shown, as an implementation manner, in the embodiment of the present application, it further includes: a pin guide rod 12 and a pin guide cavity 13 corresponding to the pin guide rod 12; the pin guide cavity 13 is arranged in the movable support seat 4; the piston rod 3 of the pin cylinder 1 and the pin 5 are connected through a connecting member 14, one end of the pin 5 is fixedly connected to the connecting member 14, and the middle of the piston rod 3 is connected to the connecting member 14; the pin guide rod 12 is fixedly connected to the other end of the connecting member 14. In this embodiment, when the piston rod 3 drives the pin 5 to pull outwards or insert inwards into the accommodation space between the movable support seat 4 and the platform, it drives the pin guide rod 12 to slide outwards and inwards in the pin guide cavity 13, which can play a guiding role and effectively reduce the eccentric load received by the pin 5.

[0082] As Figure 3 shown, as an implementation manner, in the embodiment of the present application, it further includes: a sliding wheel 16; the sliding wheel 16 is fixedly arranged on one side of the movable support seat 4, and when the movable support seat 4 is lifted upwards, the sliding wheel 16 slides upwards along the sliding groove on the segment of the caisson. In this embodiment, when the movable support seat 4 is lifted upwards or lowered, the sliding wheel 16 slides upwards or downwards along the sliding groove on the segment of the caisson, which can play a guiding role.

[0083] As Figure 4As shown in the figure, the present application also provides a hydraulic system for a caisson tunneling machine, including: a pin cylinder 1, an electromagnetic directional control valve 7, a hydraulic pump 21, an oil tank 23, and a motor 22; the motor 22 is connected to the hydraulic pump 21, and the motor 22 is used to provide a power source for the hydraulic pump 21; the inlet port of the hydraulic pump 21 communicates with the oil tank 23; the P port of the electromagnetic directional control valve 7 communicates with the outlet port of the hydraulic pump 21; the T port of the electromagnetic directional control valve 7 communicates with the oil tank 23; the rodless cavity of the pin cylinder 1 communicates with the A port of the electromagnetic directional control valve 7, and the rod chamber of the pin cylinder 1 communicates with the B port of the electromagnetic directional control valve 7; when the right position of the electromagnetic directional control valve 7 is energized, the P port and the A port of the electromagnetic directional control valve 7 are communicated, and the B port and the T port of the electromagnetic directional control valve 7 are communicated; when the left position of the electromagnetic directional control valve 7 is energized, the P port and the B port of the electromagnetic directional control valve 7 are communicated, and the A port and the T port of the electromagnetic directional control valve 7 are communicated. In this embodiment, when the right position of the electromagnetic directional control valve 7 is energized, since the P port and the A port of the electromagnetic directional control valve 7 are communicated, the pressure oil input at the P port can be communicated to the rodless cavity of the pin cylinder 1. Since the B port and the T port of the electromagnetic directional control valve 7 are communicated, the oil in the rod chamber of the pin cylinder 1 returns to the oil tank 23, thereby causing the pin cylinder 1 to extend and drive the pin 5 to disengage; when the left position of the electromagnetic directional control valve 7 is energized, since the P port and the B port of the electromagnetic directional control valve 7 are communicated, the pressure oil input at the P port can be communicated to the rod chamber of the pin cylinder 1. Since the A port and the T port of the electromagnetic directional control valve 7 are communicated, the oil in the rodless cavity of the pin cylinder 1 returns to the oil tank 23, thereby causing the pin cylinder 1 to retract and drive the pin 5 to insert.

[0084] As Figure 5 shown, as an implementation manner, in the embodiment of the present application, it further includes: a balance valve group 9; the balance valve group 9 includes two sets of balance valves. One set of balance valves respectively communicates the A port of the electromagnetic directional control valve 7 and the rodless cavity of the pin cylinder 1, and the other set of balance valves respectively communicates the B port of the electromagnetic directional control valve 7 and the rod chamber of the pin cylinder 1. By setting the balance valve group 9, the extension or retraction of the pin cylinder 1 can be maintained at a fixed position; in this embodiment, the number of pin cylinders 1 is at least two, and at least two pin cylinders 1 are uniformly controlled by the same balance valve group 9, making the control of the pin device simpler and more reliable.

[0085] As Figure 5As shown, as an implementation manner, in the embodiments of the present application, it further includes: an accumulator 17, an electromagnetic ball valve 18, and a manual reversing valve 20; the accumulator 17 is communicated with the P oil port of the manual reversing valve 20 through the electromagnetic ball valve 18; the accumulator 17 is also communicated with the P oil port of the electromagnetic reversing valve 7 through the electromagnetic ball valve 18; the T oil port of the manual reversing valve 20 is communicated with the oil tank 23; the A oil port of the manual reversing valve 20 is communicated with the rodless cavity of the pin cylinder 1; the B oil port of the manual reversing valve 20 is communicated with the rod cavity of the pin cylinder 1. In this embodiment, when the underground communication is interrupted or the motor 22 fails, the electromagnetic ball valve 18 resets, that is, the valve of the electromagnetic ball valve 18 opens. If it is necessary to lift the roadheader, the accumulator 17 provides the operating pressure, and the pin cylinder 1 can be controlled to extend by manually controlling the manual reversing valve 20 on the ground, so as to realize the emergency release of the pin 5.

[0086] As Figure 5 As shown, as an implementation manner, in the embodiments of the present application, it further includes: a first pilot-operated check valve 191 and a second pilot-operated check valve 192; the A oil port of the manual reversing valve 20 is communicated with the first oil port of the first pilot-operated check valve 191; the second oil port of the first pilot-operated check valve 191 is communicated with the rodless cavity of the pin cylinder 1; the control oil port of the first pilot-operated check valve 191 is communicated with the B oil port of the manual reversing valve 20; the B oil port of the manual reversing valve 20 is also communicated with the first oil port of the second pilot-operated check valve 192; the second oil port of the second pilot-operated check valve 192 is communicated with the rod cavity of the pin cylinder 1; the control oil port of the second pilot-operated check valve 192 is communicated with the A oil port of the manual reversing valve 20. The function of the pilot-operated check valve 2519 is to keep the extension or retraction of the pin cylinder 1 in a fixed position. It is set underground to isolate the ground and underground systems from each other without affecting each other.

[0087] As Figure 5 As shown, as an implementation manner, in the embodiments of the present application, it further includes: an oil suction filter 24, a check valve 25, and a relief valve 26; the oil inlet of the oil suction filter 24 is communicated with the oil tank 23; the oil outlet of the oil suction filter 24 is communicated with the oil inlet of the hydraulic pump 21; the oil inlet of the check valve 25 is communicated with the oil outlet of the hydraulic pump 21; the oil outlet of the check valve 25 is respectively communicated with the P oil port of the electromagnetic reversing valve 7 and the P oil port of the manual reversing valve 20; the relief valve 26 is connected in parallel to the oil outlet of the check valve 25. In this embodiment, the oil suction filter 24 is used to filter the hydraulic oil input from the hydraulic oil tank 23, the check valve 25 is used to prevent the pressure of the accumulator 17 from causing the hydraulic pump 21 to reverse, and the relief valve 26 is used to limit the maximum pressure output by the hydraulic pump 21.

[0088] As Figure 5As shown, as an implementation manner, in the embodiments of the present application, it further includes: a controller and a stroke sensor 15; the stroke sensor 15 is connected to the controller. When the stroke sensor 15 detects that the piston rod 3 of the pin cylinder 1 extends outward to a first preset position, the stroke sensor 15 sends a first signal to the controller, and the controller controls the roadheader to lift upward based on the first signal. In this embodiment, the controller is not shown in the drawings. The stroke sensor 15 and the controller can be electrically connected or communicatively connected.

[0089] As Figure 5 shown, as an implementation manner, in the embodiments of the present application, it further includes: a weighing sensor 8; the controller is respectively connected to the weighing sensor 8 and the electromagnetic directional control valve 7; when the movable support seat 4 contacts the bottom platform of the caisson, the weighing sensor 8 outputs a second signal to the controller, and the controller controls the left position of the electromagnetic directional control valve 7 to be energized based on the second signal, so that the piston rod 3 drives the pin 5 to insert inward until both ends of the pin 5 are located below the two bumps 11 of the fixed seat 10 and then stops. Since the pin 5 is blocked by the bump 11, the movable support seat 4 cannot be lifted, realizing the fixation of the movable support seat 4 underground; the controller can be electrically connected or communicatively connected to the weighing sensor 8 and the electromagnetic directional control valve 7 respectively.

[0090] As Figure 6 shown, the present application also provides a pin control method for a caisson roadheader, which is applied to the hydraulic system of the above-mentioned caisson roadheader. The method includes:

[0091] S101. When the roadheader needs to be lifted, the controller controls the right position of the electromagnetic directional control valve to be energized, so that the piston rod of the pin cylinder drives the pin to pull outwards;

[0092] S102. The controller obtains the first signal output by the stroke sensor and controls the roadheader to lift upward based on the first signal, where the first signal is output by the stroke sensor when it detects that the piston rod extends outward to the first preset position.

[0093] As an implementation manner, in the embodiments of the present application, the method further includes:

[0094] S201. The controller obtains the second signal output by the weighing sensor and controls the left position of the electromagnetic directional control valve to be energized based on the second signal, so that the piston rod drives the pin to insert inward. The second signal is output by the weighing sensor when the movable support seat contacts the bottom platform of the caisson;

[0095] S202. The controller obtains the third signal output by the stroke sensor and controls the roadheader to stop lowering based on the third signal. The third signal is output by the stroke sensor when it detects that the piston rod inserts inward to the second preset position.

[0096] It should be understood that in this application, if terms such as "system", "device", "unit" and / or "module" are used, they are only a way to distinguish different components, elements, parts, portions or assemblies at different levels. However, if other terms can achieve the same purpose, they can be replaced by other expressions.

[0097] The embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0098] The above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pin device of a caisson tunneling machine, characterized in that, Including: A latch cylinder, a hydraulic system for driving the latch cylinder to act, a movable support seat, a latch, and a fixed seat located on the bottom platform of the caisson; The cylinder barrel of the latch cylinder is connected to the movable support seat, and the piston rod of the latch cylinder is connected to the latch; The movable support seat is fixedly connected to the support beam of the tunneling machine; A groove is provided on one side of the middle part of the latch; A convex block is provided on the fixed seat so that the latch can be blocked by the convex block on the fixed seat; When the tunneling machine needs to be lifted, the piston rod can drive the latch to protrude outwards until the groove of the latch is located below the convex block and then stops, so that the latch is not blocked by the convex block, so that the tunneling machine can drive the movable support seat to continue to lift upwards; The hydraulic system includes: a controller, a stroke sensor, a weighing sensor, and an electromagnetic directional valve; The stroke sensor is connected to the controller; The controller is respectively connected to the weighing sensor and the electromagnetic directional valve; When the stroke sensor detects that the piston rod of the latch cylinder extends outwards to a first preset position, the stroke sensor sends a first signal to the controller, and the controller controls the tunneling machine to lift upwards based on the first signal; When the movable support seat contacts the bottom platform of the caisson, the weighing sensor outputs a second signal to the controller, and the controller controls the left position of the electromagnetic directional valve to be energized based on the second signal, so that the piston rod drives the latch to insert inwards until both ends of the latch are located below the two convex blocks of the fixed seat and then stops.

2. The pin device of the open caisson tunneling machine according to claim 1, characterized in that, It also includes: A latch guide rod, and a latch guide cavity corresponding to the latch guide rod; The latch guide cavity is arranged in the movable support seat; The piston rod of the latch cylinder is connected to the latch through a connecting piece, one end of the latch is fixedly connected to the connecting piece, and the middle part of the piston rod is connected to the connecting piece; The latch guide rod is fixedly connected to the other end of the connecting piece.

3. The pin device of the open caisson tunneling machine according to claim 1 or 2, characterized in that, It also includes: A sliding wheel; The sliding wheel is fixedly arranged on one side of the movable support seat. When the movable support seat is lifted upwards, the sliding wheel slides upwards along the sliding groove on the segment of the caisson.

4. The pin device of the open caisson tunneling machine according to claim 1, characterized in that, The hydraulic system also includes: a hydraulic pump, an oil tank, a motor; The motor is connected to the hydraulic pump, and the motor is used to provide a power source for the hydraulic pump; The inlet of the hydraulic pump is communicated with the oil tank; The P port of the electromagnetic directional valve is communicated with the outlet of the hydraulic pump; The T port of the electromagnetic directional valve is communicated with the oil tank; The rodless cavity of the latch cylinder is communicated with the A port of the electromagnetic directional valve, and the rod cavity of the latch cylinder is communicated with the B port of the electromagnetic directional valve; When the right position of the electromagnetic directional valve is energized, the P port and the A port of the electromagnetic directional valve are communicated, and the B port and the T port of the electromagnetic directional valve are communicated; When the left position of the electromagnetic directional valve is energized, the P port and the B port of the electromagnetic directional valve are communicated, and the A port and the T port of the electromagnetic directional valve are communicated.

5. The pin device of the open caisson tunneling machine according to claim 4, characterized in that, The hydraulic system also includes: A balance valve group; The balance valve group includes two sets of balance valves. One set of the balance valves is respectively connected to the A oil port of the electromagnetic directional valve and the rodless cavity of the pin cylinder, and the other set of the balance valves is respectively connected to the B oil port of the electromagnetic directional valve and the rod cavity of the pin cylinder.

6. The pin device of the open caisson tunneling machine according to claim 5, characterized in that, The hydraulic system further includes: an accumulator, an electromagnetic ball valve, and a manual directional valve; The accumulator is connected to the P oil port of the manual directional valve through the electromagnetic ball valve; The accumulator is also connected to the P oil port of the electromagnetic directional valve through the electromagnetic ball valve; The T oil port of the manual directional valve is connected to the fuel tank; The A oil port of the manual directional valve is connected to the rodless cavity of the pin cylinder; The B oil port of the manual directional valve is connected to the rod cavity of the pin cylinder.

7. The pin device of the open caisson tunneling machine according to claim 6, characterized in that, The hydraulic system further includes: a first pilot-operated check valve and a second pilot-operated check valve; The A oil port of the manual directional valve is connected to the first oil port of the first pilot-operated check valve; The second oil port of the first pilot-operated check valve is connected to the rodless cavity of the pin cylinder; The control oil port of the first pilot-operated check valve is connected to the B oil port of the manual directional valve; The B oil port of the manual directional valve is also connected to the first oil port of the second pilot-operated check valve; The second oil port of the second pilot-operated check valve is connected to the rod cavity of the pin cylinder; The control oil port of the second pilot-operated check valve is connected to the A oil port of the manual directional valve.

8. The pin device of the open caisson tunneling machine according to claim 7, characterized in that, The hydraulic system further includes: an oil suction filter, a check valve, and a relief valve; The oil inlet of the oil suction filter is connected to the fuel tank; The oil outlet of the oil suction filter is connected to the oil inlet of the hydraulic pump; The oil inlet of the check valve is connected to the oil outlet of the hydraulic pump; The oil outlet of the check valve is respectively connected to the P oil port of the electromagnetic directional valve and the P oil port of the manual directional valve; The relief valve is connected in parallel to the oil outlet of the check valve.

9. A pin control method for a caisson tunneling machine, characterized in that, Applied to the pin device of the open caisson tunneling machine as described in claim 1, the method includes: When the tunneling machine needs to be lifted, the controller controls the right position of the electromagnetic directional valve to be energized, so that the piston rod of the pin cylinder drives the pin to protrude outwards until the groove of the pin is located below the convex block and then stops; The controller obtains the first signal output by the travel sensor and controls the tunneling machine to lift upwards based on the first signal, where the first signal is output by the travel sensor when it detects that the piston rod extends outwards to the first preset position; The controller obtains the second signal output by the weighing sensor and controls the left position of the electromagnetic directional valve to be energized based on the second signal, so that the piston rod drives the pin to insert inwards until both ends of the pin are located below the two convex blocks of the fixed seat and then stops, and the second signal is output by the weighing sensor when the movable support seat contacts the bottom platform of the open caisson.

10. The pin control method according to claim 9, wherein The method further includes: The controller obtains the third signal output by the travel sensor and controls the tunneling machine to stop lowering based on the third signal, where the third signal is output by the travel sensor when it detects that the piston rod inserts inwards to the second preset position.

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