Muddy water casing joint for synchronous pipe connection

Abstract

The invention relates to a muddy water casing joint for synchronous pipe connection, a reversing casing joint is composed of an inner casing installed in an outer casing, a cover plate and a base plate, the cover plate and the base plate are arranged at the two ends of the inner casing, and the reversing casing joint is of a horizontal cylindrical structure of a set of concentric casings and is provided with three pipe connection openings and two flowing channels. A reversing sleeve joint is connected with the through pipe through a quick-connection hoop to form a pipe section with a standard length; the reversing casing joint can switch the two flowing channels, and the switching of the muddy water flowing channels is completed by matching with the switching of the two flowing channels of the pipe connector. The inner sleeve is rotated to enable the pipe orifice to be communicated with the pipe orifice of the outer sleeve respectively to form two groups of fluid channels, so that the flowing channels of the slurry feeding and discharging pump of the shield tunneling machine can be switched, a through channel is always kept, and the pipe connecting operation can be carried out at a non-conducted pipeline.

Description

Technical Field

[0001] The invention relates to a mud-water shield machine which can continuously connect mud-water pipelines without stopping the machine during the excavation construction process, and in particular to a mud-water casing joint used for synchronous connection. Background Art

[0002] During the tunneling process of the slurry shield machine, the slurry pipeline needs to be continuously connected so that it can move forward with the shield head. Each time the slurry pipeline is connected, it is necessary to stop advancing, close the two stop valves of the pipe in and out of the pipe, and open the circulation pipe in the slurry bin to maintain soil pressure. If the pipe connection operation can be carried out during the continuous advancement, it can save construction time and improve efficiency. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a mud and water casing joint for synchronous pipe connection, which can be used for connecting the matching mud and water inlet and outlet pipelines during the continuous excavation of the mud and water shield machine, thereby solving the technical problem of shutdown and pipe connection during construction.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a mud and water casing joint for synchronous pipe connection, which is composed of an inner casing installed in an outer casing and a cover plate and a base plate arranged at both ends to form a reversing casing joint. The reversing casing joint is a horizontal cylindrical structure of a group of concentric casings, with three pipe connection ports and two flow channels. The reversing casing joint is connected with a through pipe by a quick-connect clamp to form a pipe section of standard length; the reversing casing joint can switch between two flow channels, cooperate with the switching of the two flow channels of the pipe connection device to complete the switching of the mud and water flow channels, so that when the pipe connection is continued, there is always one channel connected, and the pipe connection operation can be carried out at the unconnected pipeline.

[0005] Furthermore, three connecting ports are arranged on the cylindrical surface of the outer sleeve, two of which are opposite ports and the upper one is an oblique port.

[0006] Furthermore, front and rear flange ring plates are provided at both ends of the outer sleeve.

[0007] Furthermore, polytetrafluoroethylene is laid on the cylindrical surface of the inner sleeve, and a through pipe opening is provided. The inner sleeve can respectively conduct two groups of channels by rotating at a fixed angle, corresponding to the pipe opening of the outer sleeve.

[0008] Furthermore, the front and rear end faces of the inner sleeve are closed, and an outlet shaft is arranged outside the front end face, extending out of the outer sleeve, and a square shaft section is arranged at the outer end thereof, and a through hole is arranged.

[0009] Furthermore, the cover plate is located outside the front flange plate of the outer sleeve, is bolted to the outer sleeve, and has a sealing auxiliary part on the connection surface.

[0010] Furthermore, a through hole is provided at the center of the cover plate, which is rotatably matched with the outlet shaft of the inner sleeve, and a sealing auxiliary part is provided on the matching surface.

[0011] Furthermore, the base plate is located outside the rear flange plate of the outer sleeve, is bolted to the outer sleeve, and has a sealing auxiliary part on the connection surface.

[0012] The beneficial effects of the present invention are:

[0013] The present invention rotates the inner sleeve to connect the pipe openings with the pipe openings of the outer sleeve respectively, forming two groups of fluid channels, so that the flow channels of the shield machine's slurry inlet and outlet pumps can be switched, ensuring that there is always a through channel, and taking over operations can be performed at unconnected pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the mud-water casing joint for synchronously connecting pipes of the present invention;

[0015] Figure 2 It is a schematic diagram of the outer sleeve structure of the present invention;

[0016] Figure 3 It is a schematic diagram of the inner sleeve structure of the present invention;

[0017] Figure 4 A schematic diagram of a flow channel of the present invention;

[0018] Figure 5 This is a second schematic diagram of the flow channel of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] like Figures 1 to 3 As shown, a mud and water casing joint for synchronous connection of the present invention is composed of an outer casing 1, an inner casing 2, a cover plate 3, a base plate 4, etc. to form a reversing casing joint. The reversing casing joint is a cylindrical structure of a group of concentric casings and a horizontal working structure.

[0021] Three pipe connections are arranged on the cylindrical surface of the outer sleeve 1, two of which are opposite connections 1-1, and the upper one is an oblique connection 1-2. Front and rear flange ring plates are arranged at both ends of the outer sleeve 1.

[0022] Polytetrafluoroethylene is laid on the cylindrical surface of the inner sleeve 2, and a through pipe opening 2-1 is set. The inner sleeve 2 can be rotated at a fixed angle to conduct two sets of channels respectively, corresponding to the pipe opening of the outer sleeve 1. The front and rear end faces of the inner sleeve 2 are closed, and the outer side of the front end face has an output shaft 2-2, which extends out of the outer sleeve 1, and its outer end is provided with a square shaft section and a through hole.

[0023] The cover plate 3 is located outside the front flange plate of the outer sleeve 1, and is bolted to the outer sleeve 1, and a sealing auxiliary is provided on the connection surface. A through hole is provided in the center of the cover plate 3, and is rotatably matched with the outlet shaft of the inner sleeve 2, and a sealing auxiliary is provided on the matching surface.

[0024] The base plate 4 is located outside the rear flange plate of the outer sleeve 1 and is connected to the outer sleeve 1 by bolts, and a sealing auxiliary part is provided on the connection surface.

[0025] The reversing sleeve joint is connected with the through pipe by a quick-connect clamp to form a pipe section of standard length. The reversing sleeve joint can switch two flow channels, and cooperate with the switching of the two flow channels of the modified pipe joint to complete the switching of the muddy water flow channel, so that when the pipe joint is connected, there is always one channel that is connected, and the pipe joint operation can be carried out at the pipeline that is not connected.

[0026] This embodiment uses the illustrated structure as an example to illustrate the present invention.

[0027] The mud-water casing joint of the present invention is connected to the front end of the mud-water pipe of the slurry inlet and outlet pipeline of the mud-water shield machine. When in use, the two groups of connecting ports of the modified connecting pipe are respectively connected to the connecting ports of the present invention, usually in the form of quick-connect clamps.

[0028] Normally, the horizontal flow is used as the normal flow channel, and the inner casing 2 is rotated so that it forms a horizontal flow channel with the outer casing 1 (see Figure 4 ), the slurry enters from the horizontal pipe mouth of the outer casing 1 and flows into the subsequent pipeline.

[0029] When the shield machine continues to advance to a length close to a section of the pipe, the inner casing 2 is rotated so that one side of the pipe opening is connected with the oblique upper pipe opening of the outer casing 1, and the other side of the pipe opening is connected with the subsequent horizontal pipe opening, forming an oblique turning flow channel (see Figure 5 ), and at the same time switch the flow channel of the takeover device, so that the inlet and outlet slurry enters from the oblique upper pipe opening of the outer casing 1 and flows into the subsequent pipeline. At this time, there is no slurry flowing into the horizontal channel inlet, and the quick-connect clamp can be disconnected and separated from the takeover device to carry out the takeover operation. The process is similar to the conventional method.

Claims

1. A mud-water casing joint for synchronous connection, characterized in that: The reversing sleeve joint is composed of an inner sleeve installed in an outer sleeve and a cover plate and a base plate arranged at both ends. The reversing sleeve joint is a horizontal cylindrical structure of a group of concentric sleeves, with three connecting pipe ports and two flow channels. The reversing sleeve joint is connected with a through pipe by a quick-connect clamp to form a pipe section of standard length; the reversing sleeve joint can switch between two flow channels, cooperate with the switching of the two flow channels of the connecting pipe to complete the switching of the mud and water flow channels, so that when the connecting pipe joint is continued, there is always one channel connected, and the connecting pipe operation can be carried out at the unconnected pipeline.

2. The mud-water casing joint for synchronous connection according to claim 1, characterized in that: Three pipe connections are arranged on the cylindrical surface of the outer sleeve, two of which are opposite connections and one is an oblique connection on the top.

3. The mud-water casing joint for synchronous connection according to claim 1, characterized in that: Front and rear flange ring plates are arranged at both ends of the outer sleeve.

4. The mud-water casing joint for synchronous connection according to claim 1, characterized in that: Polytetrafluoroethylene is laid on the cylindrical surface of the inner sleeve and a through pipe opening is arranged. The inner sleeve can respectively conduct two groups of channels by rotating at a fixed angle, which correspond to the pipe opening of the outer sleeve.

5. The mud-water casing joint for synchronous connection according to claim 4, characterized in that: The front and rear end faces of the inner sleeve are closed, an outlet shaft is arranged outside the front end face and extends out of the outer sleeve, a square shaft section is arranged at the outer end thereof and a through hole is arranged.

6. The mud-water casing joint for synchronous connection according to claim 1, characterized in that: The cover plate is located outside the front flange plate of the outer sleeve and is connected with the outer sleeve by bolts. The connection surface is provided with sealing accessories.

7. The mud-water casing joint for synchronous connection according to claim 6, characterized in that: The center of the cover plate is provided with a through hole, which is rotatably matched with the outlet shaft of the inner sleeve, and the matching surface is provided with a sealing auxiliary part.

8. The mud-water casing joint for synchronous connection according to claim 1, characterized in that: The base plate is located outside the rear flange plate of the outer casing and is connected to the outer casing by bolts, and a sealing auxiliary part is provided on the connection surface.

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