A shield machine hydraulic station pipeline sealing connection structure

Abstract

The utility model discloses a kind of shield machine hydraulic station pipeline sealing connection structure, it is related to pipeline sealing structure technical field, including hydraulic oil pump, inlet pipe, outlet pipe and solenoid valve, the fixed communication of output pipe end of hydraulic oil pump and solenoid valve, the solenoid valve includes electric control valve head, valve seat, hydraulic branch pipe, connecting pipe, hydraulic oil flow channel and connecting seat, the sidewall of valve seat is equipped with connecting socket, the utility model is in movable ring plate, spring and side push ring plate in connecting seat are used in cooperation, can compensate sealing compression force in real time, when being subjected to external vibration and leading to the thread pretightening force attenuation of outer thread pipe and connecting socket, spring releases elastic force and pushes side push ring plate extrusion sealing ring, avoid the gap between sealing surface. Compared with traditional thread sealing, prolongs structure sealing failure cycle, reduces leakage rate.

Description

Technical Field

[0001] This utility model relates to the field of pipeline sealing structure technology, and in particular to a pipeline sealing connection structure for a shield machine hydraulic station. Background Technology

[0002] As the core equipment of underground tunnel engineering, the hydraulic station of the tunnel boring machine is the heart of power transmission. It is responsible for supplying high-pressure hydraulic oil to key actuators such as cutterhead drive, propulsion system, and segment assembly. The sealing performance of the hydraulic station pipeline directly determines whether the tunnel boring machine can operate continuously and stably. The special working environment and high-pressure conditions of the tunnel boring machine impose stringent requirements on the sealing connection of the pipeline.

[0003] However, in the existing technology, the traditional sealing connection structure is affected by high-frequency vibration under the harsh working conditions of the tunnel boring machine, which can lead to the reduction of the preload of the threaded connection, the loosening of the flange bolts, the rebound of the seal due to insufficient clamping force, the increase of the gap between the sealing surfaces, the leakage of hydraulic oil, and the easy occurrence of sealing failure. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that traditional sealing connection structures, under the harsh working conditions of tunnel boring machines, are prone to problems such as reduced preload of threaded connections, loosening of flange bolts, rebound of seals due to insufficient clamping force, increased gap of sealing surfaces, hydraulic oil leakage, and easy sealing failure due to high-frequency vibration. Therefore, a sealing connection structure for the hydraulic station pipeline of tunnel boring machines is proposed.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a sealing connection structure for the hydraulic station pipeline of a tunnel boring machine, comprising a hydraulic oil pump, an inlet pipe, an outlet pipe, and a solenoid valve. The output pipe end of the hydraulic oil pump is fixedly connected to the solenoid valve. The solenoid valve includes an electrically controlled valve head, a valve seat, a hydraulic branch pipe, a connecting pipe, a hydraulic oil flow channel, and a connecting base. The side wall of the valve seat has a connecting socket. One end of the connecting base is threaded to the inner wall of the connecting socket, and the other end of the connecting base is fixedly connected to the end of the hydraulic branch pipe. The connecting base includes a pressure plate, a connecting pipe, a movable ring plate, a spring, a side-push ring plate, a sealing ring, and an externally threaded pipe. The externally threaded pipe is fixedly connected to the outer wall of the connecting pipe, and the outer wall of the externally threaded pipe is threadedly connected to the inner wall of the connecting socket. The sealing ring is movably connected to the end face of the externally threaded pipe. The movable ring plate and the side-push ring plate are both disposed between the inner side of the sealing ring and the outer wall of the connecting pipe. The spring is fixedly connected between the movable ring plate and the side-push ring plate. The end face of the pressure plate is fixedly connected to the movable ring plate.

[0006] Preferably, the electrically controlled valve head is mounted on the top surface of the valve seat, and the connecting pipe is fixedly mounted on the outer wall of one side of the valve seat.

[0007] Preferably, a pressure gauge is fixedly connected to one end of the connecting pipe, and one end of the pressure gauge is fixedly connected to the end of the outlet pipe.

[0008] Preferably, one end of the outlet pipe is fixedly connected to the output end of the hydraulic oil pump, and the inlet pipe is fixedly connected to the input end of the hydraulic oil pump.

[0009] Preferably, the hydraulic oil passage is located inside the valve seat, the inside of the connecting pipe is connected to the inside of the hydraulic branch pipe, and the inside of the hydraulic oil passage is connected to the hydraulic branch pipe through a connecting port and a connecting pipe.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, the cooperation of the movable ring plate, spring, and side-push ring plate inside the connecting seat can compensate for the sealing pressure in real time. When external vibration causes the thread preload of the external threaded pipe and the connecting socket to decrease, the spring releases its elastic force to push the side-push ring plate to squeeze the sealing ring, thus preventing the formation of a gap in the sealing surface. Compared with traditional threaded seals, this extends the structural seal failure cycle and reduces the leakage rate. 2. In this utility model, the pressure gauge connected by the connecting pipe can monitor the pressure in the hydraulic oil flow channel in real time. When the sealing ring leaks slightly, the pressure gauge will simultaneously show an abnormal drop in pressure, and the staff can judge the sealing status without disassembling the pipeline. Attached Figure Description

[0011] Figure 1 This utility model provides a three-dimensional structural diagram of a sealing connection structure for the hydraulic station pipeline of a tunnel boring machine. Figure 2 This utility model provides a structural schematic diagram of a solenoid valve for a sealed connection structure of a hydraulic station pipeline in a tunnel boring machine. Figure 3 This utility model provides a schematic diagram of the internal structure of a valve seat for a sealing connection structure of a hydraulic station pipeline in a tunnel boring machine. Figure 4 This utility model proposes a sealing connection structure for the hydraulic station pipeline of a tunnel boring machine. Figure 3 Enlarged view of the structure at point A in the middle.

[0012] Legend: 1. Hydraulic pump; 2. Inlet pipe; 3. Outlet pipe; 4. Solenoid valve; 41. Electrically controlled valve head; 42. Valve seat; 421. Connecting socket; 43. Hydraulic branch pipe; 44. Connecting pipe; 45. Hydraulic oil flow channel; 46. Connecting seat; 461. Pressure plate; 462. Connecting pipe; 463. Movable ring plate; 464. Spring; 465. Side push ring plate; 466. Sealing ring; 467. External threaded pipe; 5. Pressure gauge. Detailed Implementation

[0013] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0014] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0015] Example 1: As Figure 1 - Figure 4 As shown, this utility model provides a sealed connection structure for the hydraulic station pipeline of a tunnel boring machine, including a hydraulic oil pump 1, an inlet pipe 2, an outlet pipe 3, and a solenoid valve 4. The output pipe end of the hydraulic oil pump 1 is fixedly connected to the solenoid valve 4. The solenoid valve 4 includes an electrically controlled valve head 41, a valve seat 42, a hydraulic branch pipe 43, a connecting pipe 44, a hydraulic oil flow channel 45, and a connecting seat 46. The side wall of the valve seat 42 has a connecting socket 421. One end of the connecting seat 46 is threaded to the inner wall of the connecting socket 421, and the other end of the connecting seat 46 is fixedly connected to the end of the hydraulic branch pipe 43. The connecting seat 46 includes a pressure plate 461 and a connecting pipe 44. 62. Movable ring plate 463, spring 464, side-push ring plate 465, sealing ring 466, and external threaded pipe 467. The external threaded pipe 467 is fixedly connected to the outer wall of the connecting pipe 462. The outer wall of the external threaded pipe 467 is threadedly connected to the inner wall of the connecting socket 421. The sealing ring 466 is movably connected to the end face of the external threaded pipe 467. The movable ring plate 463 and the side-push ring plate 465 are both set between the inner side of the sealing ring 466 and the outer wall of the connecting pipe 462. The spring 464 is fixedly connected between the movable ring plate 463 and the side-push ring plate 465. The end face of the pressure plate 461 is fixedly connected to the movable ring plate 463.

[0016] The specific settings and functions of this embodiment are described in detail below. The sealing ring 466 is movably connected to the end face of the external threaded pipe 467 and is the core sealing component. It is made of oil-resistant and high-temperature resistant fluororubber. Its end face is in contact with the inner wall of the connecting socket 421, which can prevent hydraulic oil from leaking from the thread gap between the external threaded pipe 467 and the connecting socket 421, forming the first line of sealing defense. The movable ring plate 463, the side push ring plate 465 and the spring 464 together form an elastic pre-tightening compensation mechanism. One end of the movable ring plate 463 is fixed to the pressure plate 461 and the other end is connected to the spring 464. One end of the side push ring plate 465 is fixed to the spring 464 and the other end is in contact with the inner side of the sealing ring 466. During installation, as the external threaded pipe 467 is tightened, the pressure plate 461 pushes the movable ring plate 463 along with the thread, compressing the spring 464 and generating elastic force. This force is transmitted to the sealing ring 466 through the side-push ring plate 465, forcing the sealing ring 466 to fit tightly against the end face of the connection socket 421, thus compensating for the defect of easy attenuation of preload in traditional threaded connections. When vibration causes a decrease in thread preload or slight aging and deformation of the sealing ring 466, the spring 464 can release its elastic force, pushing the side-push ring plate 465 to continuously compress the sealing ring 466, achieving dynamic compensation of sealing pressure and avoiding gaps in the sealing surface.

[0017] Example 2: Figure 1 - Figure 4 As shown, the electric valve head 41 is installed on the top surface of the valve seat 42, and the connecting pipe 44 is fixedly installed on the outer wall of one side of the valve seat 42. One end of the connecting pipe 44 is fixedly connected to the pressure gauge 5, and one end of the pressure gauge 5 is fixedly connected to the end of the outlet pipe 3. One end of the outlet pipe 3 is fixedly connected to the output end of the hydraulic oil pump 1, and the inlet pipe 2 is fixedly connected to the input end of the hydraulic oil pump 1. The hydraulic oil flow channel 45 is set inside the valve seat 42, and the inside of the connecting pipe 462 is connected to the inside of the hydraulic branch pipe 43. The inside of the hydraulic oil flow channel 45 is connected to the hydraulic branch pipe 43 through the connecting socket 421 and the connecting pipe 462.

[0018] The overall effect of this embodiment is that one end of the connecting pipe 44 is fixed to the valve seat 42, and the other end is connected to the pressure gauge 5. The pressure gauge 5 is connected to the outlet pipe 3, which can monitor the hydraulic oil pressure output by the hydraulic oil pump 1 to the solenoid valve 4 in real time. If the pressure in the outlet pipe 3 and the hydraulic oil flow channel 45 drops abnormally, the pressure gauge 5 can immediately report the pressure change. The staff can judge the sealing status without disassembling the structure.

[0019] The usage and working principle of this device are as follows: The inlet pipe 2 is fixedly connected to the input end of the hydraulic oil pump 1; one end of the outlet pipe 3 is fixed to the output end of the hydraulic oil pump 1, and the other end is fixed to one end of the pressure gauge 5. The other end of the pressure gauge 5 is fixed to the connecting pipe 44 of the valve seat 42, thus completing the assembly of the hydraulic power input and pressure monitoring link. The external threaded pipe 467 of the connecting seat 46 is aligned with the connecting socket 421 of the valve seat 42. The connecting seat 46 is rotated clockwise to engage the external threaded pipe 467 with the threaded inner wall of the connecting socket 421. As the thread advances, the pressure plate 461 presses against the movable ring plate 463, and the spring 464 is gradually compressed. The compression is controlled at 2-3 mm to ensure the elastic preload meets the standard, until the sealing ring 466 tightly fits against the end face of the connecting socket 421. The end of the hydraulic branch pipe 43 is fixedly connected to the connecting pipe 462 of the connecting seat 46, and the electric control valve head 41 is installed on the top surface of the valve seat 42, completing the overall device assembly. During tunnel boring machine (TBM) operation, hydraulic oil enters hydraulic oil pump 1 through inlet pipe 2. After being pressurized by hydraulic oil pump 1, it is delivered to the connecting pipe 44 of solenoid valve 4 through outlet pipe 3, and then enters the hydraulic oil flow channel 45 inside valve seat 42. The high-pressure hydraulic oil in hydraulic oil flow channel 45 enters the connecting pipe 462 of connecting seat 46 through connecting port 421, and is finally delivered to hydraulic branch pipe 43 to provide power for the TBM cutterhead drive, propulsion system and other actuators.

[0020] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A sealed connection structure for the hydraulic station pipeline of a tunnel boring machine, comprising a hydraulic oil pump (1), an inlet pipe (2), an outlet pipe (3), and a solenoid valve (4), wherein the output pipe end of the hydraulic oil pump (1) is fixedly connected to the solenoid valve (4), characterized in that: The solenoid valve (4) includes an electrically controlled valve head (41), a valve seat (42), a hydraulic branch pipe (43), a connecting pipe (44), a hydraulic oil passage (45), and a connecting seat (46). The valve seat (42) has a connecting socket (421) on its side wall. One end of the connecting seat (46) is threaded to the inner wall of the connecting socket (421), and the other end of the connecting seat (46) is fixedly connected to the end of the hydraulic branch pipe (43). The connecting seat (46) includes a pressure plate (461), a connecting pipe (462), a movable ring plate (463), a spring (464), a side-push ring plate (465), a sealing ring (466), and an outer... A threaded tube (467) is fixedly connected to the outer wall of a connecting tube (462). The outer wall of the threaded tube (467) is threadedly connected to the inner wall of a connecting socket (421). A sealing ring (466) is movably connected to the end face of the threaded tube (467). A movable ring plate (463) and a side-push ring plate (465) are both disposed between the inner side of the sealing ring (466) and the outer wall of the connecting tube (462). A spring (464) is fixedly connected between the movable ring plate (463) and the side-push ring plate (465). The end face of a pressure plate (461) is fixedly connected to the movable ring plate (463).

2. The pipe sealing connection structure of a hydraulic station of a tunneling machine according to claim 1, characterized in that: The electrically controlled valve head (41) is installed on the top surface of the valve seat (42), and the connecting pipe (44) is fixedly installed on the outer wall of one side of the valve seat (42).

3. The pipe sealing connection structure of a hydraulic station of a shield tunneling machine according to claim 2, characterized in that: One end of the connecting pipe (44) is fixedly connected to a pressure gauge (5), and one end of the pressure gauge (5) is fixedly connected to the end of the liquid outlet pipe (3).

4. The pipe sealing connection structure of a hydraulic station of a shield tunneling machine according to claim 3, characterized in that: One end of the outlet pipe (3) is fixedly connected to the output end of the hydraulic oil pump (1), and the inlet pipe (2) is fixedly connected to the input end of the hydraulic oil pump (1).

5. The pipe sealing connection structure of a hydraulic station of a shield tunneling machine according to claim 1, characterized in that: The hydraulic oil flow channel (45) is located inside the valve seat (42), and the inside of the connecting pipe (462) is connected to the inside of the hydraulic branch pipe (43). The inside of the hydraulic oil flow channel (45) is connected to the hydraulic branch pipe (43) through the connecting port (421) and the connecting pipe (462).

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