Rotary pipeline compensation device and shield tunneling machine
By designing a rotary pipeline compensation device, automatic compensation of pipeline length is achieved using transmission thread connection, which solves the problems of pipeline air leakage and cooling caused by changes in the space spacing of the air cushion chamber, and ensures sealing and stability during construction.
Patent Information
- Application Number
- CN202420732194.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-10
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-04-10
AI Technical Summary
In the air cushion chamber of the shield machine, the length of the pipeline needs to be compensated according to the change in the space spacing of the air cushion chamber, otherwise it will cause air leakage or cold shrinkage of the pipeline, affecting construction efficiency and quality.
A rotary pipe compensation device is designed, including a first connector, a second connector, an intermediate connector and a seal. Through the transmission threaded connection, the intermediate connector can be automatically rotated to change the length of the pipe and ensure the sealing of the pipe.
Automatic compensation of pipeline length is achieved, ensuring the sealing and stability of the pipeline when the pressure of the air cushion chamber changes, avoiding air leakage and cooling and shrinkage problems, and improving construction efficiency and quality.
Smart Images
Figure CN222437353U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of shield machines, and in particular relates to a rotary pipeline compensation device and a shield machine. Background Art
[0002] During the construction process of slurry shield machines and multi-mode shield machines equipped with air cushion chambers, many pipelines need to be led from the rear or normal pressure middle shield to the excavation chamber. The pipelines need to pass through the air cushion chamber when they are led to the excavation chamber. The air cushion chamber is a pressurized chamber. The pressure of the air cushion chamber in different geological shield sections varies from 1 to 10 bar. The pipeline passing through the chamber needs to withstand the pressure inside the chamber, and this pressure acts on the outside of the pipeline passing through the chamber. The pipeline passing through the chamber conveys pressurized liquid or gas, and the pipeline needs to be able to withstand a certain internal pressure, which acts on the inside of the pipeline passing through the chamber.
[0003] The air cushion silo is a pressure-bearing silo. When the air cushion silo is under pressure, the front and rear partitions will be slightly deformed or even displaced. The pipes in the silo will be stretched as the partitions deform. If the pipes through the silo cannot compensate for the stretching deformation, there will be tiny gaps at the joints of the pipes through the silo, causing air leakage and slurry leakage. The pipes through the silo will also shrink due to temperature changes. In severe cases, there will be tiny gaps at the joints of the pipes, causing air leakage and slurry leakage. Utility Model Content
[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present utility model is to provide a rotary pipe compensation device and a shield machine, which are used to solve the problem in the prior art that the spatial spacing of the air cushion bin of the shield machine will change and the length of the pipe passing through the bin needs to be compensated accordingly.
[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a rotary pipeline compensation device and a shield machine.
[0006] Among them, a rotary pipeline compensation device includes a first connecting member, a second connecting member, an intermediate connecting member and a sealing member;
[0007] One side of the first connecting member and the second connecting member are both fixedly connected to the external water pipe, and the intermediate connecting member is connected between the first connecting member and the second connecting member;
[0008] The intermediate connecting member is connected to the first connecting member and the second connecting member via transmission threads;
[0009] A sealing member is disposed inside the connection between the first connection member and the intermediate connection member, and inside the connection between the second connection member and the intermediate connection member.
[0010] Optionally, the transmission thread is a non-self-locking thread.
[0011] Optionally, the sealing member is a skirt comprising a waist and a hem, wherein the waist is fixed on one side of the seam of the inner wall of the pipe, and the hem extends to the other side of the seam of the inner wall of the pipe, and when the hem is subjected to fluid pressure, it opens and fits tightly against the pipe wall to form a sealing interface.
[0012] Optionally, the waist is fixedly arranged on the inner wall of the first connecting member, and the skirt passes through the middle connecting member and extends to the second connecting member;
[0013] Alternatively, the waist is fixedly arranged on the inner wall of the second connecting member, and the hem of the skirt passes through the middle connecting member and extends to the first connecting member.
[0014] Optionally, a skirt is provided at the connection between the first connector and the inner wall of the middle connector, and at the connection between the inner wall of the middle connector and the second connector, respectively, and the waist and hem of the skirt are located on both sides of the seam of the connection.
[0015] Optionally, the skirt is made of rubber.
[0016] Optionally, the thickness of the skirt is 2-3 mm.
[0017] Optionally, the sealing member is a sealing film fixedly connected to both sides of the seam at the connection of the inner wall of the pipeline and capable of deformation.
[0018] Optionally, the sealing membrane is made of rubber.
[0019] Among them, a shield machine includes the compensation device as described above, and also includes an air cushion cabin and a hard pipe passing through the air cushion cabin, the two ends of the hard pipe are respectively connected to the partitions on both sides of the air cushion cabin, and the compensation device is connected in the hard pipe loop and is located in the air cushion cabin.
[0020] As described above, the rotary pipeline compensation device and shield machine of the utility model have at least the following beneficial effects:
[0021] Connected in the middle of the pipeline, it can automatically compensate for the change in spacing on both sides of the pipeline, and the compensation process is smooth. Specifically, the pipeline compensation device includes a first connector, a second connector, an intermediate connector and a seal; one side of the first connector and the second connector are fixedly connected to the external water pipe, and the intermediate connector is connected between the first connector and the second connector; the intermediate connector is connected to the first connector and the second connector through a transmission thread, and when the first connector or the second connector is subjected to axial pressure, the pressure acts on the intermediate connector, and the intermediate connector can rotate to change the length of the entire compensation device; the inside of the connection between the first connector and the intermediate connector, and the inside of the connection between the second connector and the intermediate connector are both provided with seals to achieve a sealing effect. In summary, this device has the characteristics of automatic compensation for the length of the water pipe and good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 Shown is a half-section schematic diagram of the compensation device of the utility model.
[0023] Figure 2 Shown is a half-section stereoscopic schematic diagram of the compensation device of the utility model.
[0024] Figure 3 Shown is a schematic diagram of the sealing membrane setting of the compensation device of the utility model.
[0025] Figure 4 Shown is a schematic diagram of the installation of the compensation device of the utility model in a shield machine.
[0026] Among them: a first connecting member 10, a second connecting member 12, an intermediate connecting member 13, a skirt 14, a waist 141, a skirt 142, a sealing membrane 15, a transmission thread 16, an air cushion cabin 17, a partition 18, a hard pipe 19, and an excavation chamber 20. DETAILED DESCRIPTION
[0027] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0028] See also Figures 1 to 4 . 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 limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.
[0029] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.
[0030] For this example, please refer to Figure 1 and 4 , an embodiment of a rotary pipeline compensation device provided by the utility model includes a first connecting member 10, a second connecting member 12, an intermediate connecting member 13 and a sealing member;
[0031] One side of the first connecting member 10 and the second connecting member 12 are both fixedly connected to the external water pipe, and the middle connecting member 13 is connected between the first connecting member 10 and the second connecting member 12;
[0032] The intermediate connecting member 13 is connected to the first connecting member 10 and the second connecting member 12 via a transmission thread 16;
[0033] Sealing members are provided inside the connection between the first connecting member 10 and the intermediate connecting member 13 and inside the connection between the second connecting member 12 and the intermediate connecting member 13 .
[0034] In the above embodiment, please combine Figure 4 The pipeline compensation device is connected in the middle of the hard chamber-penetrating pipeline 19, and the two sides of the chamber-penetrating pipeline 19 are respectively fixedly connected to the partitions 18 on both sides of the shield machine air cushion cabin 17, wherein the outer side of the partition 18 on the side of the shield machine head is the excavation chamber 20, and the excavation chamber 20 contains the mud excavated by the shield machine. When the shield machine excavates in different geological conditions, the soil pressure of the excavation chamber 20 will be different, and the air cushion cabin 17 also has corresponding pressure to support and balance the excavation chamber 20. Therefore, the position and shape of the partition 18 on this side will change, which will cause the distance between the partitions 18 on both sides of the air cushion cabin 17 to change, and the length of the chamber-penetrating pipeline 19 will also need to change accordingly. Since the first connector 10 and the intermediate connector 13, the second connector 12 and the intermediate connector 13 are all connected by transmission threads, when the distance between the air cushion cabin 17 changes, resulting in a corresponding change in the length of the pipeline 19, an axial force is formed at both ends of the first connector 10 and the second connector 12, and the force acts on the intermediate connector 13 through the transmission threads, and the intermediate connector 13 automatically rotates, thereby inserting into the first connector 10 and the second connector 12 or pulling out from the first connector 10 and the second connector 12, thereby changing the length of the entire compensation device. In the specific implementation, attention should be paid to the setting of the thread rotation direction on both sides of the intermediate connector 13 to avoid the situation in which one end of the intermediate connector 13 is inserted into the first connector 10 and the other end is pulled out of the second connector 12 during the rotation process of the intermediate connector 13, in which case there is no compensation effect. The correct way is that when subjected to axial compression, both sides of the intermediate connector 13 are respectively inserted into the first connector 10 and the second connector 12, and when subjected to axial tensile force, both sides of the intermediate connector 13 are pulled out from the first connector 10 and the second connector 12. This can be achieved by setting the transmission threads on both sides of the intermediate connector 13 to reverse.
[0035] In the above-mentioned embodiment, the transmission thread is different from the fastening thread. In the fastening thread, the component can only be moved axially by turning the nut or the screw, and it cannot be moved axially by applying an axial force to one of the components. However, in the transmission thread, such as the thread used for the lead screw, the lead screw and the nut can be axially driven to each other. Specifically, when the lead screw is pulled axially, the lead screw can move axially relative to the nut, and the nut rotates in situ; when the nut is pulled axially, the nut can also move along the axis of the lead screw, and the lead screw rotates in situ. Therefore, in this embodiment, the intermediate connector 13 can be rotated by axial force to achieve a change in the overall length of the compensation device.
[0036] In the above embodiment, both sides of the intermediate connector 13 are connected to the first connector 10 and the second connector 12 through transmission threads, so as to achieve length compensation of the through-bin pipe 19 when subjected to axial force, and a seal is provided at the pipe connection to achieve expansion and contraction while maintaining sealing. Moreover, since the expansion and contraction is achieved through threads, compared with direct axial sliding fit, the expansion and contraction process is smoother and can absorb axial impact loads.
[0037] Furthermore, the transmission thread 16 is a non-self-locking thread. In the self-locking spiral transmission, it is required that the screw cannot be driven by any axial force acting on the nut, no matter how large the force is. This characteristic, called self-locking, can ensure that the spiral transmission mechanism can rely on its own structure to achieve positioning and support, and the screw will not move due to changes in load. When the helix angle is less than the equivalent friction angle between the tooth surfaces, the spiral transmission has a self-locking characteristic and can only convert rotation into axial movement. In this embodiment, it is necessary to use axial force to drive, and to have a good response effect, so the use of non-self-locking threads will be better.
[0038] For this example, please refer to Figure 1 and Figure 2 The sealing member is a skirt 14 including a waist 141 and a skirt 142. The waist 141 is fixed to one side of the seam of the inner wall of the pipe, and the skirt 142 extends to the other side of the seam of the inner wall of the pipe. When the skirt 142 is subjected to fluid pressure, it opens and clings to the pipe wall to form a sealing interface, thereby closing the seam of the inner wall of the pipe to form a sealing effect. The higher the fluid pressure, the better the sealing effect. In addition, as an elastic sheet-like membrane layer, when the intermediate connector 13 rotates, the skirt 142 can also be twisted or wrinkled to produce a length change.
[0039] For further information, see Figure 2, the waist 141 is fixedly arranged on the inner wall of the first connecting member 10, and the skirt 142 passes through the intermediate connecting member 13 and extends to the second connecting member 12; or, the waist 141 is fixedly arranged on the inner wall of the second connecting member 12, and the skirt 142 passes through the intermediate connecting member 13 and extends to the first connecting member 10. In this embodiment, only one skirt 14 is required, and the skirt 142 of the skirt 14 is long enough to completely cover the two seams of the compensation device, thereby improving the sealing effect. As for the direction of the waist 141 and the skirt 142 of the skirt 14, it can be determined according to the flow direction of the liquid or gas inside the pipeline, the waist 141 is arranged on the inflow side, and the skirt 142 is arranged on the outflow side.
[0040] For this example, please refer to Figure 1 A skirt 14 is provided at the connection between the inner wall of the first connector 10 and the inner wall of the intermediate connector 13, and at the connection between the inner wall of the second connector 12. The waist 141 and the skirt 142 of the skirt 14 are respectively located on both sides of the seam of the connection. The skirt 142 is made of rubber, preferably wear-resistant rubber. The thin sheet of rubber is relatively soft and can be deformed when under pressure, and has a good sealing effect. The thickness of the skirt 142 is 2-3mm. Within this thickness range, the sealing gasket can provide sufficient sealing performance to meet application requirements. It can effectively fill the tiny gaps between the sealing surfaces to prevent liquid or gas leakage. As a better embodiment, the thickness of the skirt can gradually become thinner from the waist. This makes the skirt have different deformation sealing properties at different positions, and has a good sealing effect on fluids of various pressures in the pipeline.
[0041] For this example, please refer to Figure 3 This embodiment provides another sealing method. The sealing member is a deformable sealing film 15 fixedly connected to both sides of the joint at the inner wall of the pipe. The sealing film 15 is made of rubber. The sealing film 15 can be stretched and twisted. When the intermediate connecting member 13 rotates, the sealing film 15 can be deformed accordingly without being damaged. When the fluid pressure in the pipe acts on the sealing film 15, the sealing film 15 bulges and contacts the pipe wall to be supported and can withstand great water pressure.
[0042] This embodiment is an embodiment of a shield machine. Please refer to Figure 4, including the compensation device as described above, and also including an air cushion cabin 17 and a hard pipe 19 passing through the air cushion cabin 17, the two ends of the hard pipe 19 are respectively connected to the partitions 18 on both sides of the air cushion cabin 17, and the compensation device is connected to the hard pipe 19 loop and is located in the air cushion cabin 17. Since the pressure of the fluid transported in the hard pipe 19 is relatively high, the flexible pipe cannot be used, so the hard pipe 19 is used. However, since the excavation chamber 20 contains mud excavated by the shield machine, when the shield machine excavates in different geological conditions, the soil pressure of the excavation chamber 20 will be different, so the partition 18 on this side will have a change in position and shape, which will cause the spacing between the partitions 18 on both sides of the air cushion cabin 17 to change, so that the length of the hard pipe 19 needs to be compensated accordingly to maintain the stability and reliability of the device as a whole, so the compensation device is connected to the hard pipe 19 to achieve automatic length compensation while maintaining the sealing of the pipe.
[0043] In summary, the utility model effectively overcomes various shortcomings in the prior art, can produce beneficial technical effects, and has significant progress.
[0044] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.
Claims
1. A rotary pipeline compensation device, characterized in that: It comprises a first connecting piece (10), a second connecting piece (12), an intermediate connecting piece (13) and a sealing piece; One side of the first connecting member (10) and the second connecting member (12) are both fixedly connected to an external water pipe, and the intermediate connecting member (13) is connected between the first connecting member (10) and the second connecting member (12); The intermediate connecting member (13) is connected to the first connecting member (10) and the second connecting member (12) via a transmission thread (16); Sealing members are provided inside the connection between the first connecting member (10) and the intermediate connecting member (13), and inside the connection between the second connecting member (12) and the intermediate connecting member (13).
2. A rotary pipeline compensating device as claimed in claim 1, characterized in that: The transmission thread (16) is a non-self-locking thread.
3. A rotary pipeline compensating device according to claim 1, characterized in that: The sealing member is a skirt (14) comprising a waist (141) and a skirt (142), wherein the waist (141) is fixed to one side of the seam of the inner wall of the pipe, and the skirt (142) extends to the other side of the seam of the inner wall of the pipe. When the skirt (142) is subjected to fluid pressure, it opens and clings to the pipe wall to form a sealing interface.
4. A rotary pipeline compensating device as claimed in claim 3, characterized in that: The waist portion (141) is fixedly arranged on the inner wall of the first connecting member (10), and the skirt hem (142) passes through the middle connecting member (13) and extends to the second connecting member (12); Alternatively, the waist portion (141) is fixedly arranged on the inner wall of the second connecting member (12), and the skirt hem (142) passes through the middle connecting member (13) and extends to the first connecting member (10).
5. A rotary pipeline compensating device as claimed in claim 3, characterized in that: A skirt portion (14) is provided at the connection point between the inner wall of the first connecting member (10) and the middle connecting member (13), and at the connection point between the inner wall of the middle connecting member (13) and the second connecting member (12), respectively, and the waist portion (141) and the hem (142) of the skirt portion (14) are respectively located on both sides of the seam of the connection point.
6. A rotary pipeline compensating device according to any one of claims 3 to 5, characterized in that: The skirt (142) is made of rubber.
7. A rotary pipeline compensating device according to any one of claims 3 to 5, characterized in that: The thickness of the skirt (142) is 2-3 mm.
8. A rotary pipeline compensating device as claimed in claim 1, characterized in that: The sealing member is a sealing film (15) which is fixedly connected to both sides of the seam at the connection point of the inner wall of the pipeline and can be deformed.
9. A rotary pipeline compensating device as claimed in claim 8, characterized in that: The sealing film (15) is made of rubber.
10. A shield machine, characterized in that: The compensating device comprises the compensating device as described in any one of claims 1 to 5 and 8 to 9, and also comprises an air cushion cabin (17) and a hard pipe (19) passing through the air cushion cabin (17), wherein both ends of the hard pipe (19) are respectively connected to the partitions (18) on both sides of the air cushion cabin (17), and the compensating device is connected in the loop of the hard pipe (19) and is located in the air cushion cabin (17).