An engineering device for tunnel

Abstract

A tunnel engineering device comprises a trolley assembly and a needle beam; the trolley assembly comprises a hydraulic assembly, a formwork assembly, and a trolley frame; the hydraulic assembly comprises an oil cylinder and a control valve; the needle beam comprises a frame body and hydraulic support legs; wherein the frame body can be supported to the ground by the hydraulic support legs, and when supported to the ground, the trolley assembly can move along the needle beam; the needle beam passes through the trolley assembly, and the oil cylinder is provided on the trolley frame, and the oil cylinder drives the formwork assembly to move, and the control valve controls the opening and closing of the oil circuit leading to the oil cylinder; a telescopic assembly is also provided under the trolley frame, and when the trolley frame is supported to the ground by the telescopic assembly, the needle beam can move back and forth along the trolley frame.

Description

Technical Field

[0001] The present invention relates to the field of tunnel construction, and in particular to an engineering device for tunnels. Background Art

[0002] Lining trolleys, also known as lining trolleys, are primarily used for pouring concrete in tunnels, diversion tunnels, and secondary linings. Trolleys come in two configurations: a travel-type and a needle-beam type. They primarily consist of a gantry and formwork. The gantry primarily bears the load, while the formwork is designed based on the tunnel's geometry. They feature automatic travel and hydraulically controlled positioning and demolding (capable of up, down, left, and right movement).

[0003] In actual engineering practice, the following problems exist:

[0004] When the needle beam trolley passes through a tunnel, the space occupied by the trolley can be controlled by moving the template, maximizing its passability. This is technically known as demolding. The template's movement is driven and controlled by a hydraulic cylinder. As is well known, the cylinder's drive control is achieved through a multi-way valve, which controls the flow of oil into and out of the cavities on both sides of the piston in the cylinder.

[0005] In the prior art, a single template of a needle beam trolley is driven by more than one driving cylinder, and the driving cylinders often appear in pairs at the same height. At this time, it is necessary to maintain the synchronization of the two driving cylinders as much as possible.

[0006] 2. As mentioned above, the diversion technology solution is used to solve the problem of maintaining the synchronization of the two driving cylinders. However, for the diversion of the multi-way valve, the two fluids drive the piston of one cylinder to move in one direction respectively during diversion; however, when the piston moves in the opposite direction, it will flow back, and the two diversion oils that flow back will return to the multi-way valve at the same time, which will cause a certain degree of oil circuit congestion and water hammer.

[0007] 3. When the needle beam trolley template of the existing technology is driven, the oil pipe between the multi-way valve and the oil cylinder may rupture and leak after construction in harsh environments or long-term use. At this time, if oil is passed from the multi-way valve to the oil cylinder, the leakage cannot be discovered and controlled in time.

[0008] Fourth, in the existing technology, spring return technology is common, but in many working conditions, the spring has to work in a liquid environment and is subject to corrosion. At the same time, the spring and the spring push rod will be affected by the impact force of the liquid in the flow path, resulting in malfunction or shortened service life.

[0009] 5. Continuing with the fourth point, in the slider-connecting rod spring structure, when the slider moves to one side, if the connecting rod is connected to the slider, the connecting rod will follow the left and right movement of the slider and will not always press against the sliding plug. The sliding plug will easily be pushed open by the oil pressure, allowing the oil to enter the spring cavity.

[0010] 6. Continuing from the fifth point, a longer connecting rod will result in a decrease in stiffness. Summary of the Invention

[0011] In order to overcome the above problems, the present invention proposes a solution to solve the above multiple problems at the same time.

[0012] The technical solution adopted by the present invention to solve its technical problem is: an engineering device for a tunnel, comprising a trolley assembly and a needle beam; the trolley assembly comprises a hydraulic assembly, a template assembly, and a trolley frame, the hydraulic assembly comprises an oil cylinder and a control valve; the needle beam comprises a frame body and hydraulic support legs; the frame body can be supported to the ground by the hydraulic support legs, and when supported to the ground, the trolley assembly can move along the needle beam; the needle beam passes through the trolley assembly, the oil cylinder is provided on the trolley frame, the oil cylinder drives the template assembly to move, and the control valve controls the on-and-off of the oil circuit leading to the oil cylinder; the template assembly comprises a top template, a first side template, a second side template, a third side template, a fourth side template, and a bottom template; a telescopic assembly is also provided under the trolley frame, and when the trolley frame is supported to the ground by the telescopic assembly, the needle beam can move back and forth along the trolley frame;

[0013] The control valve includes a valve body, a driving device, a main piston, a valve stem, a secondary piston, and a driving rod. The valve body is provided with a first oil outlet, a second oil outlet, an oil return port, an oil inlet, a main oil circuit, a buffer chamber, a bridge connecting passage, a guide block, a shunt connecting passage, a first vertical flow passage, a second vertical flow passage, a slider, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod, a sixth connecting rod, a seventh connecting rod, an eighth connecting rod, a spring chamber, a sliding plug, and a spring. The shunt connecting passage includes a left flow passage and a right flow passage.

[0014] The driving device is connected to one end of the secondary piston through a driving rod, the other end of the secondary piston is connected to one end of the valve stem, and the other end of the valve stem is connected to the main piston, and the main piston can move in the valve body cavity; in the first state, the main piston blocks the main oil circuit, in the second state, the main piston blocks the oil return port so that the oil inlet is connected to the main oil circuit, and in the third state, the main piston blocks the oil inlet so that the main oil circuit is connected to the oil return port;

[0015] A buffer chamber is provided at the upper end of the main oil circuit, the buffer chamber wall includes an arc surface, a guide block is provided in the buffer chamber, a left flow path is provided at the left end of the buffer chamber, and a right flow path is provided at the right end. The upper end of the left flow path is connected to the first vertical flow path, and the upper end of the right flow path is connected to the second vertical flow path. The first vertical flow path is connected to the upper end of the second vertical flow path through a bridge-type connecting path; a first oil outlet and a second oil outlet are provided above the bridge-type connecting path, and a slider is provided in the bridge-type connecting path;

[0016] The left end of the slider is connected to the first connecting rod and the second connecting rod, and the right end of the slider is connected to the third connecting rod and the fourth connecting rod; the distance between the first connecting rod and the second connecting rod is greater than the diameter of the left flow path; the left end of the first connecting rod is provided with a fifth connecting rod, and the right ends of the first connecting rod and the fifth connecting rod can be moved to abut or separate; the left end of the fifth connecting rod is connected to a sliding plug, and the sliding plug and the spring are arranged in a spring cavity, and the spring cavity and the bridge-type connecting path are connected through a through hole, and the fifth connecting rod blocks the through hole.

[0017] Preferably, the distance between the third connecting rod and the fourth connecting rod is greater than the diameter of the right flow path.

[0018] Preferably, a sixth connecting rod is provided at the left end of the second connecting rod, and the right ends of the second connecting rod and the sixth connecting rod can be movably abutted or separated.

[0019] Preferably, a seventh connecting rod is provided at the right end of the third connecting rod, and the left ends of the third connecting rod and the seventh connecting rod can be movably abutted or separated.

[0020] Preferably, an eighth connecting rod is provided at the right end of the fourth connecting rod, and the left ends of the fourth connecting rod and the eighth connecting rod can be movably abutted or separated.

[0021] Preferably, the diameter of the main oil circuit is larger than the diameter of the first oil outlet.

[0022] Preferably, the sliding plug is cylindrical.

[0023] Preferably, the diameter of the sliding plug is larger than the diameter of the fifth connecting rod.

[0024] Preferably, the upper surface area of ​​the slider is larger than the cross-sectional area of ​​the first oil outlet.

[0025] Preferably, the driving device is an electromagnetic driving device.

[0026] The beneficial effects of the present invention are:

[0027] 1. Regarding the first point raised in the background technology, by setting a synchronous oil circuit in the multi-way valve, the two oil outlet circuits in the multi-way valve are opened and closed at the same time, thereby ensuring the synchronization of oil inlet into the corresponding two cylinders that need to move synchronously.

[0028] 2. In response to the second point raised in the background technology, a buffer chamber is set in the synchronous oil circuit of the multi-way valve to buffer the oil concentration caused by the convergence of the oil when the two oil return lines are connected. At the same time, an arc surface and a guide slope are set in the buffer chamber to further guide the oil.

[0029] 3. Regarding the third point raised in the background technology, a first connecting path and a second connecting path are set in the synchronous oil circuit. The first connecting path is a shunt path, which transports oil to the two oil circuits. The second connecting path is a bridge connecting path. The bridge connecting path is overhead to connect the two oil circuits. A slider is provided in the bridge connecting path. When the oil pipe of one oil circuit leaks, the pressure in the oil circuit will drop. At this time, the oil pressure in the other oil circuit will push the slider in the bridge connecting path to move toward the direction of the one oil circuit, thereby gradually reducing the opening degree of the one oil circuit to reduce leakage, until subsequent sensors or employees discover and shut down.

[0030] 4. Regarding the fourth point raised in the background technology, the slider is driven by pressure at both ends, and the two ends of the slider are connected to the spring through two connecting rods (i.e., spring push rods) and a sliding plug; the sliding plug and the spring are located in the spring cavity, and a seal is achieved between the connecting rod, the sliding plug and their respective through holes to construct a multiple seal, so that the spring in the spring cavity avoids the liquid environment, and the distance between the two connecting rods is greater than the diameter of the flow path, thereby preventing the connecting rods from being directly impacted by the fluid.

[0031] 5. In response to the fifth point raised in the background technology, the connecting rod is connected to the sliding plug. In this way, even if the slider moves in one direction to disengage from the connecting rod, the connecting rod still blocks the entrance through hole of the spring chamber. At this time, even if the pressure pushes the connecting rod to overcome the spring force and move in the direction of the spring, due to the length of the connecting rod, the connecting rod will not enter the spring chamber in its entirety. Therefore, the connecting rod still blocks the entrance through hole of the spring chamber, thereby achieving sealing during the entire working process. If there is no connecting rod or the connecting rod is not connected to the sliding plug, the sliding plug will be directly pushed toward the spring, which will cause the fluid to enter the spring chamber and be difficult to discharge.

[0032] 6. Regarding the sixth point raised in the background technology, a longer connecting rod reduces its rigidity, so the connecting rod is divided into two, with the sliding plug connecting one and the slider connecting the other; this can ensure the sealing effect of the fifth point mentioned above, shorten the length of the connecting rod, and improve the rigidity.

[0033] Note: The above designs are not listed in any particular order, and each one makes the present invention distinctive and significantly advanced compared to the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below with reference to the accompanying drawings and examples.

[0035] Figure 1 This is the appearance diagram of the valve body integrated module of the present invention.

[0036] Figure 2 This is a cross-sectional view of the valve in the closed state of the present invention

[0037] Figure 3 It is a cross-sectional view of the oil inlet state of the valve of the present invention.

[0038] Figure 4 This is a cross-sectional view of the oil return state of the valve of the present invention

[0039] Figure 5 For the present invention Figure 2 Cross-sectional view in the AA direction

[0040] Figure 6 This is the working principle diagram of the slider assembly in the bridge-type connecting path of the present invention

[0041] Figure 7 Front view of the trolley showing the relationship between the oil cylinder and the template of the present invention

[0042] Figure 8 The overall three-dimensional diagram of the trolley of the present invention

[0043] Figure 9 This is a three-dimensional diagram of the needle beam of the present invention

[0044] Figure 10 This is the template assembly diagram of the present invention

[0045] Figure 11 The three-dimensional diagram of the platform frame of the present invention

[0046] In the figures, the reference numerals are as follows:

[0047] 1. Valve body, 2. First oil outlet, 3. Second oil outlet, 4. Oil return port, 5. Oil inlet, 6. Main piston, 7. Valve stem, 8. Secondary piston, 9. Drive rod, 10. Drive device, 11. Main oil circuit, 12. Buffer chamber, 13. Bridge connecting path, 14. Guide block, 15. Left flow path, 16. Right flow path, 17. First vertical flow path, 18. Second vertical flow path, 19. Slider, 20. First connecting rod, 21. Second connecting rod, 22 , the third connecting rod, 23, the fourth connecting rod, 24, the fifth connecting rod, 25, the sixth connecting rod, 26, the seventh connecting rod, 27, the eighth connecting rod, 28, the spring chamber, 29, the sliding plug, 30, the spring, 31, the top template, 32, the first side template, 33, the second side template, 34, the third side template, 35, the fourth side template, 36, the bottom template, 37, the cylinder, 38, the template assembly, 39, the trolley frame, 40, the needle beam, 41, the hydraulic support leg. DETAILED DESCRIPTION

[0048] As shown in the figure: an engineering device for a tunnel, comprising a trolley assembly and a needle beam; the trolley assembly comprises a hydraulic assembly, a template assembly, and a trolley frame, the hydraulic assembly comprises an oil cylinder and a control valve; the needle beam comprises a frame body and hydraulic support legs; the frame body can be supported to the ground by the hydraulic support legs, and when supported to the ground, the trolley assembly can move along the needle beam; the needle beam passes through the trolley assembly, the oil cylinder is provided on the trolley frame, the oil cylinder drives the template assembly to move, and the control valve controls the on-off of the oil circuit leading to the oil cylinder; the template assembly comprises a top template, a first side template, a second side template, a third side template, a fourth side template, and a bottom template; a telescopic assembly is also provided under the trolley frame, and when the trolley frame is supported to the ground by the telescopic assembly, the needle beam can move back and forth along the trolley frame;

[0049] The control valve includes a valve body, a driving device, a main piston, a valve stem, a secondary piston, and a driving rod. The valve body is provided with a first oil outlet, a second oil outlet, an oil return port, an oil inlet, a main oil circuit, a buffer chamber, a bridge connecting passage, a guide block, a shunt connecting passage, a first vertical flow passage, a second vertical flow passage, a slider, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod, a sixth connecting rod, a seventh connecting rod, an eighth connecting rod, a spring chamber, a sliding plug, and a spring. The shunt connecting passage includes a left flow passage and a right flow passage.

[0050] The driving device is connected to one end of the secondary piston through a driving rod, the other end of the secondary piston is connected to one end of the valve stem, and the other end of the valve stem is connected to the main piston, and the main piston can move in the valve body cavity; in the first state, the main piston blocks the main oil circuit, in the second state, the main piston blocks the oil return port so that the oil inlet is connected to the main oil circuit, and in the third state, the main piston blocks the oil inlet so that the main oil circuit is connected to the oil return port;

[0051] A buffer chamber is provided at the upper end of the main oil circuit, the buffer chamber wall includes an arc surface, a guide block is provided in the buffer chamber, a left flow path is provided at the left end of the buffer chamber, and a right flow path is provided at the right end. The upper end of the left flow path is connected to the first vertical flow path, and the upper end of the right flow path is connected to the second vertical flow path. The first vertical flow path is connected to the upper end of the second vertical flow path through a bridge-type connecting path; a first oil outlet and a second oil outlet are provided above the bridge-type connecting path, and a slider is provided in the bridge-type connecting path;

[0052] The left end of the slider is connected to the first connecting rod and the second connecting rod, and the right end of the slider is connected to the third connecting rod and the fourth connecting rod; the distance between the first connecting rod and the second connecting rod is greater than the diameter of the left flow path; the left end of the first connecting rod is provided with a fifth connecting rod, and the right ends of the first connecting rod and the fifth connecting rod can be moved to abut or separate; the left end of the fifth connecting rod is connected to a sliding plug, and the sliding plug and the spring are arranged in a spring cavity, and the spring cavity and the bridge-type connecting path are connected through a through hole, and the fifth connecting rod blocks the through hole.

[0053] As shown in the figure: the distance between the third connecting rod and the fourth connecting rod is greater than the diameter of the right flow path. A sixth connecting rod is provided at the left end of the second connecting rod, and the right ends of the second connecting rod and the sixth connecting rod can be movably abutted or separated. A seventh connecting rod is provided at the right end of the third connecting rod, and the left ends of the third connecting rod and the seventh connecting rod can be movably abutted or separated. An eighth connecting rod is provided at the right end of the fourth connecting rod, and the left ends of the fourth connecting rod and the eighth connecting rod can be movably abutted or separated. The diameter of the main oil circuit is greater than the diameter of the first oil outlet. The sliding plug is cylindrical. The diameter of the sliding plug is greater than the diameter of the fifth connecting rod. The upper surface area of ​​the slider is greater than the cross-sectional area of ​​the first oil outlet. The drive device is an electromagnetic drive device.

[0054] Figure 7 The oil circuit between the multi-way valve and the cylinder is not shown. Since the oil circuit structure between the multi-way valve and the cylinder to control oil inlet and return is relatively simple and well-known, simply passing oil to or draining oil from the cylinder piston chamber, and given that the oil passage and drain switching structure has been described, there is no need to draw a separate diagram of the intermediate oil pipe. To concise the text, a detailed description and diagram are omitted.

[0055] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not depart from the present invention should be included in the patent scope of this case.

Claims

1. A tunnel engineering device, characterized in that: The trolley assembly comprises a hydraulic assembly, a template assembly, and a trolley frame, and the hydraulic assembly comprises an oil cylinder and a control valve; the needle beam comprises a frame body and hydraulic support legs; the frame body can be supported to the ground by the hydraulic support legs, and when supported to the ground, the trolley assembly can move along the needle beam; the needle beam passes through the trolley assembly, and the oil cylinder is provided on the trolley frame, and the oil cylinder drives the template assembly to move, and the control valve controls the on-off of the oil circuit leading to the oil cylinder; the template assembly comprises a top template, a first side template, a second side template, a third side template, a fourth side template, and a bottom template; a telescopic assembly is also provided under the trolley frame, and when the trolley frame is supported to the ground by the telescopic assembly, the needle beam can move back and forth along the trolley frame; The control valve includes a valve body, a driving device, a main piston, a valve stem, a secondary piston, and a driving rod. The valve body is provided with a first oil outlet, a second oil outlet, an oil return port, an oil inlet, a main oil circuit, a buffer chamber, a bridge connecting passage, a guide block, a shunt connecting passage, a first vertical flow passage, a second vertical flow passage, a slider, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod, a sixth connecting rod, a seventh connecting rod, an eighth connecting rod, a spring chamber, a sliding plug, and a spring. The shunt connecting passage includes a left flow passage and a right flow passage. The driving device is connected to one end of the secondary piston through a driving rod, the other end of the secondary piston is connected to one end of the valve stem, and the other end of the valve stem is connected to the main piston, and the main piston can move in the valve body cavity; in the first state, the main piston blocks the main oil circuit, in the second state, the main piston blocks the oil return port so that the oil inlet is connected to the main oil circuit, and in the third state, the main piston blocks the oil inlet so that the main oil circuit is connected to the oil return port; A buffer chamber is provided at the upper end of the main oil circuit, the buffer chamber wall includes an arc surface, a guide block is provided in the buffer chamber, a left flow path is provided at the left end of the buffer chamber, and a right flow path is provided at the right end. The upper end of the left flow path is connected to the first vertical flow path, and the upper end of the right flow path is connected to the second vertical flow path. The first vertical flow path is connected to the upper end of the second vertical flow path through a bridge-type connecting path; a first oil outlet and a second oil outlet are provided above the bridge-type connecting path, and a slider is provided in the bridge-type connecting path; The left end of the slider is connected to the first connecting rod and the second connecting rod, and the right end of the slider is connected to the third connecting rod and the fourth connecting rod; the distance between the first connecting rod and the second connecting rod is greater than the diameter of the left flow path; the left end of the first connecting rod is provided with a fifth connecting rod, and the right ends of the first connecting rod and the fifth connecting rod can be moved to abut or separate; the left end of the fifth connecting rod is connected to a sliding plug, and the sliding plug and the spring are arranged in a spring cavity, and the spring cavity and the bridge-type connecting path are connected through a through hole, and the fifth connecting rod blocks the through hole.

2. A tunnel engineering device according to claim 1, characterized in that: The distance between the third connecting rod and the fourth connecting rod is greater than the diameter of the right flow path.

3. The tunnel engineering device according to claim 1, characterized in that: The left end of the second connecting rod is provided with a sixth connecting rod, and the right ends of the second connecting rod and the sixth connecting rod can be movably abutted or separated.

4. A tunnel engineering device according to claim 3, characterized in that: The right end of the third connecting rod is provided with a seventh connecting rod, and the left ends of the third connecting rod and the seventh connecting rod can be movably abutted or separated.

5. The tunnel engineering device according to claim 4, characterized in that: The right end of the fourth connecting rod is provided with an eighth connecting rod, and the left ends of the fourth connecting rod and the eighth connecting rod can be movably abutted or separated.

6. The tunnel engineering device according to claim 1, characterized in that: The diameter of the main oil passage is greater than the diameter of the first oil outlet.

7. The tunnel engineering device according to claim 1, characterized in that: The sliding plug is cylindrical.

8. The tunnel engineering device according to claim 7, characterized in that: The diameter of the sliding plug is larger than the diameter of the fifth connecting rod.

9. The tunnel engineering device according to claim 1, characterized in that: The upper surface area of ​​the sliding block is larger than the cross-sectional area of ​​the first oil outlet.

10. The tunnel engineering device according to claim 1, characterized in that: The driving device is an electromagnetic driving device.

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