Hydraulic support shoe valve group of a tunneling apparatus
Patent Information
- Application Number
- CN202611433788.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-16
- Publication Date
- 2026-10-20
AI Technical Summary
传统撑靴快速伸出方式通常采用大流量合流油源向撑靴油缸大腔供油、小腔回油的方式，该方式油缸伸出时间较长，降低了掘进换步的工作效率
本发明通过精确控制各电磁阀的通断电时序，系统能够灵活切换主油路与回油路的连通关系。在快速伸出工况下，可使撑靴油缸有杆腔的回油经特定插装阀直接引入无杆腔，形成差动连接，从而在不增加系统流量的前提下显著提升撑靴油缸伸出速度，有效缩短掘进换步时间，大幅提高施工效率；在缩回工况下，系统能稳定切换至常规回路，确保撑靴油缸按预定速度平稳复位，动作切换顺畅无冲击。
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Figure FT_1
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of hydraulic support shoe devices for tunneling equipment, and more particularly to a hydraulic support shoe valve assembly for tunneling equipment. Background Technology
[0002] During tunnel construction, tunneling equipment needs to use support shoes to brace against the sides of the tunnel to counteract the thrust during excavation, prevent the equipment from rolling backward, and provide stable support for the tunneling machine. The hydraulic system of the support shoes is one of the key subsystems of the tunneling equipment, and its performance directly affects tunneling efficiency and construction safety.
[0003] Currently, existing hydraulic control systems for support boots typically use a standard directional valve in conjunction with a hydraulic lock to form the control circuit. This control is achieved by manipulating the extension and retraction of the support boot cylinder to realize the functions of rapid extension, rapid retraction, and high-pressure tightening of the support boot. However, the aforementioned existing technology still has the following shortcomings: Traditional rapid extension methods for tunnel support shoes typically employ a high-flow-rate confluence oil source to supply oil to the large chamber of the support shoe cylinder and return oil to the small chamber. This method results in a longer cylinder extension time, reducing the efficiency of tunneling step switching. Furthermore, existing hydraulic control systems for tunnel support shoes generally have a low degree of functional integration, a complex structure, and high manufacturing costs.
[0004] The above background information is provided only to assist in understanding the concept and technical solution of this invention. It does not necessarily belong to the prior art of this application. In the absence of clear evidence that the above information was disclosed on the filing date of this application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention
[0005] The purpose of this invention is to provide a hydraulic support shoe valve assembly for tunneling equipment to solve the problems existing in the prior art. It can significantly improve the extension speed of the support shoe cylinder without increasing the system flow rate, effectively shorten the tunneling step change time, greatly improve the construction efficiency, and also make the action of the support shoe cylinder precise and reliable.
[0006] To achieve the above objectives, the present invention provides the following solution: A hydraulic support shoe valve assembly for tunneling equipment includes a first two-way cartridge valve, a second two-way cartridge valve, a third two-way cartridge valve, and a fourth two-way cartridge valve. The first two-way cartridge valve has port A connected to an oil inlet, port B connected to port B of the third two-way cartridge valve and port P of a first two-position four-way directional valve, and port C connected to port A of the first two-position four-way directional valve. The third two-way cartridge valve has port A connected to port A of the fourth two-way cartridge valve, and port B connected to the rod chamber of the support shoe cylinder and port P of the third two-position four-way directional valve. Port C is connected to Port A of the third two-position four-way directional valve; Port A of the second two-way cartridge valve is connected to the oil tank, Port B is connected to Port B of the fourth two-way cartridge valve and Port P of the second two-position four-way directional valve, and Port C is connected to Port A of the second two-position four-way directional valve; Port A of the fourth two-way cartridge valve is connected to Port A of the third two-way cartridge valve, Port B is connected to the rodless chamber of the support shoe cylinder and Port P of the fourth two-position four-way directional valve, and Port C is connected to Port A of the fourth two-position four-way directional valve.
[0007] As one embodiment, a first shuttle valve cover is provided between the B port of the first two-way cartridge valve and the P port of the first two-position four-way directional valve.
[0008] As one embodiment, a second shuttle valve cover is provided between the B port of the second two-way cartridge valve and the P port of the second two-position four-way directional valve.
[0009] As one implementation, the first two-position four-way directional valve is an electromagnetic directional valve.
[0010] As one implementation, the second two-position four-way directional valve is an electromagnetic directional valve.
[0011] As one implementation, the third two-position four-way directional valve is an electromagnetic directional valve.
[0012] As one implementation, the fourth two-position four-way directional valve is an electromagnetic directional valve.
[0013] As one embodiment, it also includes a first control check valve and a second control check valve. The A port of the first control check valve is connected to the oil tank, and the B port is connected to the B port of the third two-way cartridge valve. The A port of the second control check valve is connected to the oil tank, and the B port is connected to the B port of the fourth two-way cartridge valve.
[0014] In one embodiment, the first control check valve and the second control check valve are respectively a first hydraulic check valve and a second hydraulic check valve, with the control port of the first hydraulic check valve connected to port A of the second hydraulic check valve; and the control port of the second hydraulic check valve connected to port A of the first hydraulic check valve.
[0015] As one implementation, the flow rate of the first hydraulic check valve and the second hydraulic check valve after opening is less than that of the first two-way cartridge valve, the second two-way cartridge valve, the third two-way cartridge valve, and the fourth two-way cartridge valve.
[0016] Compared with the prior art, the present invention has the following technical effects: This invention enables the system to flexibly switch the connection between the main oil circuit and the return oil circuit by precisely controlling the on / off timing of each solenoid valve. During rapid extension, the return oil from the rod chamber of the support shoe cylinder can be directly introduced into the rodless chamber via a specific cartridge valve, forming a differential connection. This significantly increases the extension speed of the support shoe cylinder without increasing the system flow rate, effectively shortening the tunneling step-changing time and greatly improving construction efficiency. During retraction, the system can stably switch to the conventional circuit, ensuring that the support shoe cylinder returns to its predetermined position smoothly, with seamless and shock-free operation.
[0017] Furthermore, this invention employs a cartridge valve as the primary control element, with its valve core opening and closing precisely driven by a pilot control oil circuit. Compared to traditional directional valves, this design fundamentally avoids the risks of valve core jamming, malfunctions, or uncontrolled movements caused by pilot pressure fluctuations or oil contamination, ensuring that every action command of the support shoe cylinder is executed accurately and reliably, without any abnormal or uncontrolled movements. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the hydraulic support shoe valve assembly of a tunneling device in one embodiment of the present invention.
[0020] Figure label: 1. First two-way cartridge valve; 2. Second two-way cartridge valve; 3. Third two-way cartridge valve; 4. Fourth two-way cartridge valve; 5. Support shoe cylinder; 6. First two-position four-way directional valve; 7. Second two-position four-way directional valve; 8. Third two-position four-way directional valve; 9. Fourth two-position four-way directional valve; 10. First shuttle valve cover plate; 11. Second shuttle valve cover plate; 12. First hydraulically controlled check valve; 13. Second hydraulically controlled check valve. Detailed Implementation
[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0022] The purpose of this invention is to provide a hydraulic support shoe valve assembly for tunneling equipment to solve the problems existing in the prior art. It can significantly improve the extension speed of the support shoe cylinder without increasing the system flow rate, effectively shorten the tunneling step change time, greatly improve the construction efficiency, and also make the action of the support shoe cylinder precise and reliable.
[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0024] like Figure 1 As shown, this embodiment provides a hydraulic support shoe valve assembly for a tunneling equipment, including a first two-way cartridge valve 1, a second two-way cartridge valve 2, a third two-way cartridge valve 3, and a fourth two-way cartridge valve 4. The first two-way cartridge valve 1 has port A connected to the oil inlet, port B connected to port B of the third two-way cartridge valve 3 and port P of the first two-position four-way directional valve 6, and port C connected to port A of the first two-position four-way directional valve 6. The third two-way cartridge valve 3 has port A connected to port A of the fourth two-way cartridge valve 4, and port B connected to the rod chamber of the support shoe cylinder 5 and port P of the third two-position four-way directional valve 8. This also allows port B of the first two-way cartridge valve 1 to be directly connected to the rod chamber of the support shoe cylinder 5, and port C of the third two-way cartridge valve 3 to be connected to port A of the third two-position four-way directional valve 8. The second two-way cartridge valve 2 has port A connected to the oil tank, port B connected to port B of the fourth two-way cartridge valve 4 and port P of the second two-position four-way directional valve 7, and port C connected to port A of the second two-position four-way directional valve 7; port A of the fourth two-way cartridge valve 4 is connected to port A of the third two-way cartridge valve 3, port B is connected to the rodless chamber of the support shoe cylinder 5 and port P of the fourth two-position four-way directional valve 9, which also makes port B of the second two-way cartridge valve 2 directly connected to the rodless chamber of the support shoe cylinder 5, and port C of the fourth two-way cartridge valve 4 connected to port A of the fourth two-position four-way directional valve 9.
[0025] In this embodiment, a first shuttle valve cover plate 10 is also provided between port B of the first two-way cartridge valve 1 and port P of the first two-position four-way directional valve 6. The two oil inlets of the first shuttle valve cover plate 10 are respectively connected to ports A and B of the first two-way cartridge valve 1, and the oil outlet of the first shuttle valve cover plate 10 is connected to port P of the first two-position four-way directional valve 6. The first shuttle valve cover plate 10 provides the pilot control pressure required for the first two-way cartridge valve 1 to close when the power is off, and ensures that high pressure can be obtained regardless of whether there is pressure at port A or port B, so that the first two-way cartridge valve 1 can be reliably closed when the first two-position four-way directional valve 6 is de-energized.
[0026] In this embodiment, a second shuttle valve cover plate 11 is also provided between port B of the second two-way cartridge valve 2 and port P of the second two-position four-way directional valve 7. The two oil inlets of the second shuttle valve cover plate 11 are connected to ports A and B of the second two-way cartridge valve 2, respectively, and the oil outlet of the second shuttle valve cover plate 11 is connected to port P of the second two-position four-way directional valve 7. The working principle of the second shuttle valve cover plate 11 is the same as that of the first shuttle valve cover plate 10, and its purpose is to ensure that the second two-way cartridge valve 2 is reliably closed when the second two-position four-way directional valve 7 is de-energized.
[0027] In this embodiment, the first two-position four-way directional valve 6, the second two-position four-way directional valve 7, the third two-position four-way directional valve 8, and the fourth two-position four-way directional valve 9 are all solenoid directional valves.
[0028] This embodiment also includes a first control check valve and a second control check valve. The A port of the first control check valve is connected to the oil tank, and the B port is connected to the B port of the third two-way cartridge valve 3. The A port of the second control check valve is connected to the oil tank, and the B port is connected to the B port of the fourth two-way cartridge valve 4.
[0029] In this embodiment, the first control check valve and the second control check valve are respectively the first hydraulic check valve 12 and the second hydraulic check valve 13. The control port of the first hydraulic check valve 12 is connected to port A of the second hydraulic check valve 13; the control port of the second hydraulic check valve 13 is connected to port A of the first hydraulic check valve 12.
[0030] In this embodiment, the flow rate (i.e., the radial cross-sectional area of the flow channel) after the first hydraulic control check valve 12 and the second hydraulic control check valve 13 are opened is smaller than that of the first two-way cartridge valve 1, the second two-way cartridge valve 2, the third two-way cartridge valve 3 and the fourth two-way cartridge valve 4.
[0031] Working principle: Boot support cylinder 5 fast forward: When the first two-position four-way directional valve 6 is energized, the first two-way cartridge valve 1 opens, and the hydraulic oil at inlet P enters through port A and exits through port B of the first two-way cartridge valve 1; when the third two-position four-way directional valve 8 is energized, the third two-way cartridge valve 3 opens, and the hydraulic oil enters through port B and exits through port A of the third two-way cartridge valve 3; when the fourth two-position four-way directional valve 9 is energized, the fourth two-way cartridge valve 4 opens, and the hydraulic oil enters through port A and exits through port B of the fourth two-way cartridge valve 4, entering the rodless chamber of the support shoe cylinder 5, pushing the piston rod of the support shoe cylinder 5 to extend; the hydraulic oil in the rod chamber of the support shoe cylinder 5 enters through port B and exits through port A of the third two-way cartridge valve 3, returning to the rodless chamber of the support shoe cylinder 5.
[0032] Boot support cylinder 5 fast retraction: When the first two-position four-way directional valve 6 is energized, the first two-way cartridge valve 1 opens, and the hydraulic oil at inlet P enters through port A and exits through port B of the first two-way cartridge valve 1; when the third two-position four-way directional valve 8 is de-energized, the hydraulic oil directly enters the rod chamber of the support shoe cylinder 5 through port B of the third two-way cartridge valve 3, pushing the piston rod of the support shoe cylinder 5 to retract; when the fourth two-position four-way directional valve 9 is de-energized, the hydraulic oil in the rodless chamber of the support shoe cylinder 5 flows directly from port B of the fourth two-way cartridge valve 4 to port B of the second two-way cartridge valve 2; when the second two-position four-way directional valve 7 is energized, the second two-way cartridge valve 2 opens, and the hydraulic oil enters through port B and exits through port A of the second two-way cartridge valve 2, flowing towards outlet R2.
[0033] Slow feed of hydraulic cylinder 5 for boot support: When the second hydraulic check valve 13 is filled with oil, it simultaneously triggers the opening of the first hydraulic check valve 12. The hydraulic oil from the second hydraulic check valve 13 directly enters the rodless chamber of the support shoe cylinder 5 through the B port of the fourth two-way cartridge valve 4, pushing the piston rod to extend. The hydraulic oil in the rod chamber of the support shoe cylinder 5 enters the first hydraulic check valve 12 through the B port of the third two-way cartridge valve 3, and then flows out.
[0034] Slow retraction of hydraulic cylinder 5 for boot support: When the first hydraulic check valve 12 is filled with oil, it simultaneously triggers the opening of the second hydraulic check valve 13. The hydraulic oil from the first hydraulic check valve 12 directly enters the rod chamber of the support shoe cylinder 5 through the B port of the third two-way cartridge valve 3, pushing the piston rod back. The hydraulic oil in the rodless chamber of the support shoe cylinder 5 enters the second hydraulic check valve 13 through the B port of the fourth two-way cartridge valve 4, and then flows out.
[0035] Therefore, by precisely controlling the on / off timing of each solenoid valve, this embodiment allows the system to flexibly switch the connection between the main oil circuit and the return oil circuit. During rapid extension, the return oil from the rod chamber of the support shoe cylinder 5 can be directly introduced into the rodless chamber via a specific cartridge valve, forming a differential connection. This significantly increases the extension speed of the support shoe cylinder 5 without increasing the system flow rate, effectively shortening the tunneling step-changing time and greatly improving construction efficiency. During retraction, the system can stably switch to the conventional circuit, ensuring that the support shoe cylinder 5 returns to its predetermined position smoothly, with seamless and shock-free operation.
[0036] Furthermore, this embodiment uses a cartridge valve as the main control element, and its valve core opening and closing is precisely driven by the pilot control oil circuit. Compared with traditional ordinary directional valves, this design fundamentally avoids the risks of valve core jamming, malfunction, or uncontrolled movement caused by pilot pressure fluctuations or oil contamination, ensuring that every action command of the support shoe cylinder 5 is executed accurately and reliably, without any abnormal or uncontrolled movements.
[0037] Any adaptive changes made according to actual needs are within the scope of protection of this invention.
[0038] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.
Claims
1. A hydraulic support shoe valve assembly for tunneling equipment, characterized in that, This includes a first two-way cartridge valve, a second two-way cartridge valve, a third two-way cartridge valve, and a fourth two-way cartridge valve; The A port of the first two-way cartridge valve is connected to the oil inlet, the B port is connected to the B port of the third two-way cartridge valve and the P port of the first two-position four-way directional valve, and the C port is connected to the A port of the first two-position four-way directional valve. The A port of the third two-way cartridge valve is connected to the A port of the fourth two-way cartridge valve, the B port is connected to the rod chamber of the support shoe cylinder and the P port of the third two-position four-way reversing valve, and the C port is connected to the A port of the third two-position four-way reversing valve. The A port of the second two-way cartridge valve is connected to the oil tank, the B port is connected to the B port of the fourth two-way cartridge valve and the P port of the second two-position four-way directional valve, and the C port is connected to the A port of the second two-position four-way directional valve. The A port of the fourth two-way cartridge valve is connected to the A port of the third two-way cartridge valve, the B port is connected to the rodless chamber of the support shoe cylinder and the P port of the fourth two-position four-way directional valve, and the C port is connected to the A port of the fourth two-position four-way directional valve.
2. The hydraulic support shoe valve assembly of the tunneling equipment according to claim 1, characterized in that, A first shuttle valve cover is also provided between the B port of the first two-way cartridge valve and the P port of the first two-position four-way directional valve.
3. The hydraulic support shoe valve assembly of the tunneling equipment according to claim 1, characterized in that, A second shuttle valve cover is also provided between the B port of the second two-way cartridge valve and the P port of the second two-position four-way directional valve.
4. The hydraulic support shoe valve assembly of the tunneling equipment according to claim 1, characterized in that, The first and second position four-way directional valves are electromagnetic directional valves.
5. The hydraulic support shoe valve assembly of the tunneling equipment according to claim 1, characterized in that, The second two-position four-way directional valve is a solenoid directional valve.
6. The hydraulic support shoe valve assembly of the tunneling equipment according to claim 1, characterized in that, The third two-position four-way directional valve is an electromagnetic directional valve.
7. The hydraulic support shoe valve assembly of the tunneling equipment according to claim 1, characterized in that, The fourth two-position four-way directional valve is an electromagnetic directional valve.
8. The hydraulic support shoe valve assembly of the tunneling equipment according to any one of claims 1-7, characterized in that, It also includes a first control check valve and a second control check valve. The A port of the first control check valve is connected to the oil tank, and the B port is connected to the B port of the third two-way cartridge valve. The A port of the second control check valve is connected to the oil tank, and the B port is connected to the B port of the fourth two-way cartridge valve.
9. The hydraulic support shoe valve assembly of the tunneling equipment according to claim 8, characterized in that, The first control check valve and the second control check valve are respectively a first hydraulic check valve and a second hydraulic check valve. The control port of the first hydraulic check valve is connected to port A of the second hydraulic check valve; the control port of the second hydraulic check valve is connected to port A of the first hydraulic check valve.
10. The hydraulic support shoe valve assembly of the tunneling equipment according to claim 9, characterized in that, The flow rate of the first hydraulically controlled check valve and the second hydraulically controlled check valve after opening is less than that of the first two-way cartridge valve, the second two-way cartridge valve, the third two-way cartridge valve, and the fourth two-way cartridge valve.