Anchoring device and double-wall pipe system

Abstract

The application relates to the technical field of pipeline connection, in particular to an anchoring piece and a double-layer pipeline system. The anchoring piece comprises a first pipeline and a second pipeline. The first pipeline has an inner side wall and a containing cavity. The inner side wall circumferentially surrounds the containing cavity. The containing cavity penetrates through opposite ends of the first pipeline along a first direction. The second pipeline is arranged in the containing cavity. The second pipeline is arranged in extension along the first direction. Along the first direction, the length of the second pipeline is greater than or equal to the length of the first pipeline. The side of the second pipeline close to the first pipeline has an outer side wall. A flow channel is formed between the outer side wall and the inner side wall. The first pipeline and the second pipeline are both made of plastic. The double-layer pipeline system comprises the anchoring piece. The double-layer pipeline system with the anchoring piece has stable structure and can guarantee normal discharge of liquid effluent.

Description

Technical Field

[0001] This application relates to the field of pipe connection technology, and in particular to an anchor and a double-layer pipe system. Background Technology

[0002] In the field of nuclear power technology, a number of sites located at relatively long distances from the coastline have been included in the nuclear power development plan. These sites require the laying of pipelines several kilometers to tens of kilometers long for the discharge of liquid effluents and chemical substances (such as radioactive waste liquids, highly corrosive chemicals, etc.).

[0003] Because the liquid effluent may have a certain temperature (e.g., 20 to 30 degrees Celsius), the higher temperature will cause thermal expansion of the pipe when the liquid effluent flows inside the pipe. If the buried pipe is long, the cumulative thermal expansion can damage the structure at the outlet end of the pipe, affecting the normal drainage of the liquid. Summary of the Invention

[0004] The main purpose of this application is to propose an anchor and a double-layer pipeline system, which aims to solve the technical problem that thermal expansion accumulation occurs when laying long pipelines, which can easily lead to structural damage at the pipeline outlet.

[0005] To achieve the above objectives, in a first aspect, this application proposes an anchor, comprising: A first pipe having an inner wall and a receiving cavity, the inner wall surrounding the receiving cavity circumferentially, the receiving cavity extending through opposite ends of the first pipe in a first direction; The second pipe is disposed within the receiving cavity. The second pipe extends along the first direction, and the length of the second pipe is greater than or equal to the length of the first pipe. The side of the second pipe closest to the first pipe has an outer wall, and a flow channel is provided between the outer wall and the inner wall. Both the first pipe and the second pipe are made of plastic.

[0006] In some embodiments, the anchor further includes a protrusion disposed at opposite ends of the second pipe along the first direction, such that the length of the second pipe is greater than the length of the first pipe; The end of the protrusion furthest from the second pipe is the heat-fusion end, and the two opposite ends of the first pipe along the first direction are the electrofusion ends.

[0007] In some embodiments, along the first direction, the length L of the protrusion satisfies: L≥100mm.

[0008] In some embodiments, along the first direction, the length of the second pipe is equal to the length of the first pipe; the opposite ends of the first pipe along the first direction are heat-fusion ends, and the opposite ends of the second pipe along the first direction are heat-fusion ends.

[0009] In some embodiments, the anchor further includes a plurality of connecting portions, which are circumferentially spaced within the receiving cavity, with one end of each connecting portion connected to the inner sidewall and the other end connected to the outer sidewall; The flow channel is formed between two adjacent connecting parts.

[0010] In some embodiments, the anchor further includes a connecting portion disposed circumferentially within the receiving cavity, one end of the connecting portion being connected to the inner sidewall and the other end being connected to the outer sidewall; The connecting part has the flow channel.

[0011] In some embodiments, the connecting portion is integrally formed with the inner sidewall and the outer sidewall.

[0012] In some embodiments, the anchor further includes a support portion disposed within the receiving cavity, one end of which is connected to the inner sidewall and the other end of which is connected to the outer sidewall; The support extends along the first direction from one end of the first pipe to the other end of the first pipe.

[0013] In some embodiments, the support portion has a fan-shaped structure, and the arc range R of the support portion satisfies: 1 / 4π≤R≤3 / 4π.

[0014] In some embodiments, the anchor further includes a detection unit disposed within the receiving cavity at the end position of the second pipe.

[0015] In some embodiments, the first pipe includes a pipe wall having an inner sidewall and a connecting wall, the connecting wall and the inner sidewall being disposed opposite to each other; The anchor also includes a stop portion, which is circumferentially disposed on the connecting wall.

[0016] Secondly, this application proposes a two-layer piping system, comprising: Anchors as described in any of the above embodiments; An outer pipe having a cavity extending through opposite ends of the outer pipe along the first direction, the end of the outer pipe being connected to the end of the first pipe; An inner pipe is disposed within the cavity, and the end of the inner pipe is connected to the end of the second pipe; Both the outer pipe and the inner pipe are made of plastic.

[0017] In some embodiments, the double-layer piping system further includes an electrofusion sleeve. Along the first direction, the length of the second pipe is greater than the length of the first pipe, and the ends of the inner pipe and the second pipe can be thermally fused together. The electrofusion sleeve is disposed at the connection between the ends of the outer pipe and the first pipe, so that the ends of the outer pipe and the first pipe can be electrofused together.

[0018] Compared with the prior art, the beneficial effects of this application are: In the technical solution of this application, a long pipe can be divided into multiple shorter pipes. The anchor provided in this embodiment can connect two adjacent shorter pipes together, and so on. Using the anchor, multiple shorter pipes can be assembled to the required length. For example, this anchor is suitable for assembling double-layer pipes, which include an outer pipe and an inner pipe. When using this anchor, the first pipe and the outer pipe are aligned and connected to ensure the sealing between two adjacent outer pipes, and the second pipe and the inner pipe are aligned and connected to ensure the sealing between two adjacent inner pipes.

[0019] In this application, when using a double-layer pipe system connected by this anchor to discharge liquid effluent, the liquid effluent flows within the inner pipe, which may generate expansion heat. Because the anchor connects adjacent inner pipes, it absorbs the expansion heat between them, preventing the heat from spreading and accumulating along the length of the inner pipe. This helps to dissipate the expansion heat transferred along the inner pipe in a timely manner, reducing the deformation of the inner pipe caused by expansion heat, improving the structural stability of the inner pipe when transporting liquid effluent, and ensuring that the liquid effluent can be smoothly discharged to the designated location along the inner pipe. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A structural cross-sectional view of an anchor provided in an embodiment of this application from a first perspective; Figure 2 A cross-sectional view of the anchor provided in an embodiment of this application from a second perspective; Figure 3 This is a structural cross-sectional view of a double-layer piping system provided in an embodiment of this application.

[0022] Explanation of icon numbers: 10. Anchors; 20. Double-layer piping system; 100. First Pipeline; 110. Pipe wall; 120. Receiving cavity; 111. Inner wall; 112. Connecting wall; 200. Second Pipeline; 210. Lateral wall; 300. Flow channel; 400. Protrusion; 500. Connecting part; 600. Stop part; 700. External pipeline; 710. Cavity; 800. Internal piping; 900. Electrofusion sleeve; X, the first direction.

[0023] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0026] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or," "and / or," or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where A and B are simultaneously satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0027] In related technologies, because liquid effluents (e.g., radioactive waste, highly corrosive chemicals, etc.) may have a certain temperature (e.g., 20 to 30 degrees Celsius), the higher temperature can cause thermal expansion of the pipeline when the liquid effluent flows inside. If the buried pipeline is long, the cumulative thermal expansion can damage the structure at the pipeline's outlet, affecting the normal drainage of the liquid. For example, if the pipeline structure is damaged, the liquid effluent may leak, leading to environmental pollution.

[0028] Based on this, in order to solve the technical problem that thermal expansion accumulation in long buried pipelines can easily lead to structural damage at the pipeline outlet, referring to... Figures 1 to 3 An embodiment of this application provides an anchor 10, which can be used to connect two adjacent double-layer pipes. The anchor 10 includes a first pipe 100 and a second pipe 200.

[0029] The first conduit 100 has an inner wall 111 and a receiving cavity 120. The inner wall 111 forms the receiving cavity 120 circumferentially, and the receiving cavity 120 extends through the opposite ends of the first conduit 100 along a first direction X. For example, the first direction X can be the length direction of the first conduit 100.

[0030] The second pipe 200 is disposed within the receiving cavity 120. Exemplarily, the second pipe 200 can be fixedly connected within the receiving cavity 120. For example, the second pipe 200 and the first pipe 100 can be integrally formed, or the second pipe 200 and the first pipe 100 can be welded together by welding blocks. The second pipe 200 extends along a first direction X, and along the first direction X, the length of the second pipe 200 is greater than or equal to the length of the first pipe 100. That is, the end of the second pipe 200 can extend beyond the end of the first pipe 100, or the end of the second pipe 200 can be flush with the end of the first pipe 100. The side of the second pipe 200 near the first pipe 100 has an outer wall 210, and a flow channel 300 is provided between the outer wall 210 and the inner wall 111. The flow channel 300 can be used for the flow of liquid effluent.

[0031] Both the first pipe 100 and the second pipe 200 are made of plastic. For example, both the first pipe 100 and the second pipe 200 may be made of polyethylene (PE), or both the first pipe 100 and the second pipe 200 may be made of high-density polyethylene (HDPE).

[0032] Specifically, a long pipe can be divided into multiple shorter pipes. The anchor 10 provided in this embodiment can connect two adjacent shorter pipes together, and so on. Using the anchor 10, multiple shorter pipes can be assembled to the required length. For example, the anchor 10 is suitable for assembling double-layer pipes, which include an outer pipe 700 and an inner pipe 800. When using the anchor 10, the first pipe 100 and the outer pipe 700 are aligned and connected to ensure the sealing between two adjacent outer pipes 700, and the second pipe 200 and the inner pipe 800 are aligned and connected to ensure the sealing between two adjacent inner pipes 800.

[0033] In this embodiment, when the double-layer pipe system 20 connected by the anchor 10 is used to discharge liquid effluent, the liquid effluent flows within the inner pipe 800, which may generate expansion heat. Since the anchor 10 connects two adjacent inner pipes 800, the anchor 10 can absorb the expansion heat between the two adjacent inner pipes 800, preventing the expansion heat from spreading and accumulating along the length of the inner pipe 800. This helps to dissipate the expansion heat transferred on the inner pipe 800 in a timely manner, reduces the deformation of the inner pipe 800 caused by expansion heat, improves the structural stability of the inner pipe 800 when transporting liquid effluent, and ensures that the liquid effluent can be smoothly discharged to the designated location along the inner pipe 800.

[0034] Furthermore, this anchor 10 is used to connect double-layer pipes, and the liquid effluent flows along the innermost inner pipe 800. When the connection between the second pipe 200 and the inner pipe 800 breaks, or when other parts of the inner pipe 800 break, the liquid effluent will flow into the gap between the inner pipe 800 and the outer pipe 700. Since a flow channel 300 is provided between the outer side wall 210 and the inner side wall 111 of the anchor 10, the liquid effluent leaking from the inner pipe 800 can pass through the flow channel 300 and continue to flow, thereby ensuring that the liquid effluent leaking from the inner pipe 800 is not blocked, allowing the liquid effluent to continue to be discharged, and the liquid effluent will not be directly discharged into the external environment, effectively preventing the liquid effluent from polluting the environment.

[0035] In practical applications, since the anchor 10 provided in this embodiment needs to be buried underground, the first pipe 100 and the second pipe 200 in the anchor 10 are both made of plastic. Based on the characteristic that plastic is not easily corroded, the above material is used to prevent the anchor 10 from being corroded and damaged, extend the service life of the anchor 10, and ensure the stability and reliability of the connection between the anchor 10 and the two adjacent double-layer pipes.

[0036] Reference Figure 1 and Figure 3 In some embodiments, the anchor 10 further includes a protrusion 400 disposed at opposite ends of the second pipe 200 along the first direction X, such that the length of the second pipe 200 is greater than the length of the first pipe 100. The end of the protrusion 400 away from the second pipe 200 is a thermofusion end, and the opposite ends of the first pipe 100 along the first direction X are electrofusion ends. When the anchor 10 is installed between two adjacent double-layer pipes, an electrofusion connection can be achieved between the first pipe 100 and the outer pipe 700, and a thermofusion connection can be achieved between the second pipe 200 and the inner pipe 800 through the protrusion 400.

[0037] It is understandable that the protrusion 400 is an outward extension of the second pipe 200. By setting the protrusion 400, sufficient fusion allowance and cooling shrinkage compensation can be provided for the hot-melt connection, thereby ensuring that a hot-melt space is reserved between the second pipe 200 and the inner pipe 800, and also ensuring that a space is reserved for ultrasonic testing between the second pipe 200 and the inner pipe 800. After the second pipe 200 and the inner pipe 800 are hot-melt connected, the effect of the hot-melt connection between the second pipe 200 and the inner pipe 800 can be detected by ultrasonic waves.

[0038] Specifically, the first pipe 100 and the outer pipe 700 are connected by electrofusion. On the one hand, normally, an electrofusion sleeve 900 needs to be fitted between the first pipe 100 and the outer pipe 700 to achieve the electrofusion connection between them. With the above structure, the electrofusion sleeve 900 can compensate for and fill the connection gap between the first pipe 100 and the outer pipe 700, reducing the connection difficulty and improving the connection strength. On the other hand, the processing method is simple and efficient. The electrofusion sleeve 900 is simply fitted onto the connection between the first pipe 100 and the outer pipe 700, and then the electrofusion fitting is inserted into the electrofusion sleeve 900. After clamping, the power is applied to complete the processing, which is suitable for completing the operation in a relatively small processing space.

[0039] The second pipe 200 and the inner pipe 800 are connected by heat fusion. On the one hand, heat fusion allows the end face materials of the second pipe 200 and the inner pipe 800 to melt and fuse together directly. After cooling, the second pipe 200 and the inner pipe 800 have high bonding strength and good connection stability, which can ensure good sealing of the connection between the second pipe 200 and the inner pipe 800, so that there are no leakage points at the connection between the second pipe 200 and the inner pipe 800. On the other hand, heat fusion does not require the use of metal inserts or organic solvents, so that the joint material is consistent with the material of the second pipe 200 and the inner pipe 800. Therefore, the joint also has good corrosion resistance, which can extend the service life of the anchor 10 and the double-layer pipe.

[0040] Reference Figure 1 In some embodiments, along the first direction X, the length L of the protrusion 400 satisfies the space required for clamping and welding of pipes of different diameters by hot melt welding machines, typically 100mm≤L.

[0041] Specifically, the length L of the protrusion 400 is set within a certain range according to the pipe diameter. On the one hand, this avoids the protrusion 400 being too long, which would waste material and thus help save on the manufacturing cost of the anchor 10. On the other hand, it avoids the protrusion 400 being too short, which would prevent it from leaving enough heat fusion allowance for the second pipe 200. This would help improve the connection strength between the second pipe 200 and the inner pipe 800 and ensure the sealing of the connection between the second pipe 200 and the inner pipe 800.

[0042] In some embodiments, along the first direction X, the length of the second pipe 200 is equal to the length of the first pipe 100; the opposite ends of the first pipe 100 along the first direction X are heat-fusion ends, and the opposite ends of the second pipe 200 along the first direction X are heat-fusion ends.

[0043] Specifically, another possible implementation is that the first pipe 100 and the outer pipe 700, as well as the second pipe 200 and the inner pipe 800, can be connected by heat fusion. In this case, there is no protrusion 400 inside the anchor 10. It should be noted that in this embodiment, sufficient heat fusion allowance needs to be reserved at the pipe ends of the first pipe 100 and the second pipe 200 to improve the bonding strength between the first pipe 100 and the outer pipe 700, and between the second pipe 200 and the inner pipe 800.

[0044] The beneficial effects of using heat fusion connection between the first pipe 100 and the outer pipe 700, and between the second pipe 200 and the inner pipe 800, are described in the above embodiments and will not be repeated here.

[0045] Reference Figure 2 In some embodiments, the anchor 10 further includes a plurality of connecting portions 500, which are circumferentially spaced within the receiving cavity 120. One end of each connecting portion 500 is connected to the inner sidewall 111 and the other end is connected to the outer sidewall 210. A flow channel 300 is formed between two adjacent connecting portions 500.

[0046] Specifically, the connecting part 500 can fix the first pipe 100 and the second pipe 200 together, preventing them from separating and thus positioning the outer pipe 700 and the inner pipe 800. By uniformly arranging multiple connecting parts 500 along the circumference, the first pipe 100 and the second pipe 200 can be evenly fixed at different positions, thereby improving the connection strength and stability of the first pipe 100 and the second pipe 200.

[0047] The two adjacent connecting parts 500 are spaced apart, so that a flow channel 300 is formed between the two adjacent connecting parts 500. When the liquid effluent in the inner pipe 800 leaks into the space between the inner pipe 800 and the outer pipe 700, the liquid effluent can pass through the flow channel 300 and continue to flow downstream, so that the liquid effluent will not be blocked when it flows through the anchor 10, thereby helping to ensure the smooth discharge of the liquid effluent.

[0048] One possible implementation is that the connecting part 500 can be plate-shaped, and multiple connecting parts 500 can be arranged radially outward. With the above structure, multiple flow channels 300 can be evenly distributed in the receiving cavity 120. In this way, multiple flow channels 300 can play a role in uniformly discharging the leaked liquid outflow, so as to ensure the smooth discharge of the liquid outflow.

[0049] Reference Figure 2In some embodiments, the anchor 10 further includes a connecting portion 500, which is circumferentially disposed within the receiving cavity 120. One end of the connecting portion 500 is connected to the inner sidewall 111, and the other end is connected to the outer sidewall 210. The connecting portion 500 has a flow channel 300.

[0050] Specifically, the connecting part 500 can be an integral structure. For example, the connecting part 500 can be a whole connecting block. In this case, the connecting part 500 is integrally connected between the first pipe 100 and the second pipe 200. This can increase the connection area between the connecting part 500 and the first pipe 100 and the second pipe 200, thereby effectively improving the connection strength between the first pipe 100 and the second pipe 200.

[0051] To allow the leaked liquid from the inner pipe 800 and outer pipe 700 to flow through the anchor 10, the connecting portion 500 may be provided with multiple flow channels 300 at intervals. These flow channels 300 allow the leaked liquid to flow through the anchor 10. For example, the flow channels 300 on the connecting portion 500 can be circular, fan-shaped, straight, etc., and the number of flow channels 300 on the connecting portion 500 is determined by actual needs and is not limited to a single type.

[0052] In some embodiments, the connecting portion 500 is integrally formed with the inner sidewall 111 and the outer sidewall 210.

[0053] Specifically, the one-piece molding structure not only facilitates the processing and manufacturing of anchors 10, improves the production efficiency of anchors 10, and reduces the production difficulty of anchors 10, but also helps to improve the overall structural strength and structural stability of anchors 10 and extend the service life of anchors 10.

[0054] In some embodiments, the anchor 10 further includes a support portion (not shown) disposed within the receiving cavity 120, with one end connected to the inner sidewall 111 and the other end connected to the outer sidewall 210. The support portion extends along a first direction X from one end of the first pipe 100 to the other end of the first pipe 100.

[0055] Specifically, a support portion can be provided at the location where there is no connecting portion 500 within the receiving cavity 120. For example, the support portion can be a support plate to support the structurally weak parts within the receiving cavity 120, thereby improving the overall structural strength and stability of the anchor 10 and preventing damage to the anchor 10 after compression.

[0056] It should be noted that the support and the flow channel 300 need to be staggered to prevent the support from blocking the flow channel 300. One possible implementation is that the support can extend in a spiral shape from one end of the first pipe 100 to the other end of the first pipe 100 along the first direction X.

[0057] In some embodiments, the support portion has a fan-shaped structure, and the curvature range R of the support portion satisfies: 1 / 4π ≤ R ≤ 3 / 4π. For example, the value of R can be 1 / 4π, 1 / 2π, 2 / 3π, 3 / 4π, etc., wherein R is preferably 2 / 3π.

[0058] Specifically, the support adopts a fan-shaped structure. On the one hand, it can increase the contact area between the support and the inner wall 111 and the outer wall 210, improve the support strength of the support for the inner wall 111 and the outer wall 210, ensure the structural stability of the anchor 10, and improve the compressive strength of the anchor 10. On the other hand, it can avoid the flow channel 300, prevent the support from blocking the flow channel 300, and ensure that the liquid effluent leaked between the inner pipe 800 and the outer pipe 700 can continue to flow smoothly to the downstream side, so as to realize the normal drainage of the liquid effluent.

[0059] In some embodiments, the anchor 10 further includes a detection unit (not shown) disposed within the receiving cavity 120 at the end position of the second pipe 200. Exemplarily, the detection unit may be a sensor such as an optical fiber, used to detect whether a leak has occurred in the liquid outflow within the inner pipe 800.

[0060] Specifically, the detection unit can be electrically connected to the alarm component. When the detection unit detects a leak of liquid in the inner pipe 800, it can trigger the alarm component to remind the operator to promptly detect the leak and control the discharge of the liquid to prevent it from leaking into the external environment.

[0061] Alternatively, the detection unit can be connected to the control component. When the detection unit detects a leak of liquid effluent in the inner pipe 800, it can transmit the detection result to the control component. The control component can control the flow rate of the liquid effluent to reduce it, so as to ensure that the liquid effluent can continue to flow in the gap between the inner pipe 800 and the outer pipe 700. This ensures that the liquid effluent will not leak into the external environment, while continuing to be discharged normally at a smaller flow rate.

[0062] In some embodiments, inspection wells or detection holes can be installed at intervals along the flow path of the liquid effluent. Drainage points are installed on the inner and outer pipes of the inspection wells or detection holes to periodically check for leaks in the inner pipe 800. For example, if the water level of the liquid effluent does not reach the preset drainage point, it indicates that the inner pipe 800 may be leaking.

[0063] Reference Figures 1 to 3 In some embodiments, the first conduit 100 includes a pipe wall 110 having an inner sidewall 111 and a connecting wall 112, the connecting wall 112 and the inner sidewall 111 being disposed opposite to each other. The anchor 10 also includes a stop portion 600, which is circumferentially disposed on the connecting wall 112. Exemplarily, the stop portion 600 may be an annular structure wrapped around the connecting wall 112.

[0064] Specifically, in practical applications, the anchor 10 needs to be buried underground. The stop part 600 can increase the contact area between the anchor 10 and the soil, thereby increasing the friction between the anchor 10 and the soil, ensuring the positioning stability of the anchor 10 in the soil, preventing the anchor 10 from shifting in the soil, and ensuring the connection stability between the anchor 10 and the double-layer pipe.

[0065] In some embodiments, the stop portion 600 may be made of plastic. For example, the stop portion 600 may be made of polyethylene (PE) or high-density polyethylene (HDPE). The material of the stop portion 600 may be the same as that of the first pipe 100 and the second pipe 200, so as to facilitate the integral injection molding of the anchor 10, thereby improving the structural stability of the anchor 10 and increasing the production efficiency of the anchor 10.

[0066] Based on the corrosion resistance of plastic, the stop part 600, made of plastic, has good corrosion resistance and can extend the service life of the stop part 600.

[0067] Correspondingly, another embodiment of this application also provides a double-layer piping system 20, referring to... Figure 3 The double-layer piping system 20 includes the anchor 10 in any of the above embodiments. The double-layer piping system 20 also includes an outer pipe 700 and an inner pipe 800. The outer pipe 700 has a cavity 710 that extends through opposite ends of the outer pipe 700 along a first direction X. The end of the outer pipe 700 is connected to the end of the first pipe 100. The inner pipe 800 is disposed within the cavity 710, and the end of the inner pipe 800 is connected to the end of the second pipe 200. Both the outer pipe 700 and the inner pipe 800 are made of plastic.

[0068] Specifically, when assembling the double-layer pipe system 20, the anchor 10 is first set at a preset point, then the end of the inner pipe 800 and the end of the second pipe 200 are aligned and connected, and finally the outer pipe 700 is fitted over the inner pipe 800, and the end of the outer pipe 700 is aligned and connected with the end of the first pipe 100, thereby completing the assembly between the inner pipe 800, the outer pipe 700 and the anchor 10.

[0069] With the connection provided by the anchor 10, multiple sections of inner pipe 800 can be connected together, and multiple sections of outer pipe 700 can also be connected together, enabling long-distance laying of inner and outer pipes 700. This structure reduces the adverse effects of thermal expansion on the inner and outer pipes 700. The anchor 10 can absorb most of the expansion heat from the liquid effluent acting on the inner and outer pipes 700, thus ensuring that the inner and outer pipes 700 do not undergo significant deformation due to expansion heat, improving the structural stability of the inner and outer pipes 700, and ensuring that the liquid effluent can be smoothly discharged along the inner pipe 800 to the designated discharge location.

[0070] Based on the good compatibility of the same material, the inner pipe 800, the outer pipe 700 and the anchor 10 are made of the same material, which makes it easy to heat-melt the inner pipe 800 and the second pipe 200, or to heat-melt the outer pipe 700 and the first pipe 100, so as to improve the connection stability between the inner pipe 800 and the second pipe 200, and between the outer pipe 700 and the first pipe 100, and ensure that the liquid effluent will not leak when discharged.

[0071] In addition, since plastic has good corrosion resistance, using plastic material is beneficial to improving the corrosion resistance of the double-layer piping system 20 and extending its service life.

[0072] Reference Figure 3 In some embodiments, the double-layer piping system 20 further includes an electrofusion sleeve 900. Along the first direction X, the length of the second pipe 200 is greater than the length of the first pipe 100. The ends of the inner pipe 800 and the second pipe 200 can be heat-fused together. The electrofusion sleeve 900 is disposed at the connection between the end of the outer pipe 700 and the end of the first pipe 100 so that the ends of the outer pipe 700 and the end of the first pipe 100 can be electrofused together.

[0073] Specifically, the inner pipe 800 and the second pipe 200 are connected by heat fusion, which can improve the bonding strength between the inner pipe 800 and the second pipe 200, enhance the connection stability and sealing between the inner pipe 800 and the second pipe 200, and ensure that the liquid effluent will not leak at the joint when it flows along the inner pipe 800.

[0074] The outer pipe 700 and the first pipe 100 are connected by electrofusion. The electrofusion sleeve 900 can compensate for and eliminate the connection gap between the outer pipe 700 and the first pipe 100, reduce the fitting accuracy between the outer pipe 700 and the first pipe 100, and facilitate the connection of the outer pipe 700 and the first pipe 100 together.

[0075] Thanks to the improvements to the anchor 10 described above, the double-layer pipe system 20 of this embodiment has the same technical effects as the anchor 10 described above, which will not be repeated here.

[0076] It should be noted that other undisclosed aspects of the anchor 10 and the double-layer pipe system 20 provided in this application can be found in the prior art, and will not be repeated here.

[0077] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural transformations made based on the content of the specification and drawings of this application under the concept of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. An anchor characterized in that, include: A first pipe having an inner wall and a receiving cavity, the inner wall surrounding the receiving cavity circumferentially, the receiving cavity extending through opposite ends of the first pipe in a first direction; The second pipe is disposed within the receiving cavity. The second pipe extends along the first direction, and the length of the second pipe is greater than or equal to the length of the first pipe. The side of the second pipe closest to the first pipe has an outer wall, and a flow channel is provided between the outer wall and the inner wall. Both the first pipe and the second pipe are made of plastic.

2. The anchor according to claim 1, characterized in that, The anchor also includes a protrusion disposed at opposite ends of the second pipe along the first direction, such that the length of the second pipe is greater than the length of the first pipe; The end of the protrusion furthest from the second pipe is the heat-fusion end, and the two opposite ends of the first pipe along the first direction are the electrofusion ends.

3. The anchor according to claim 2, characterized in that, Along the first direction, the length L of the protrusion satisfies: L≥100mm.

4. The anchor according to claim 1, characterized in that, Along the first direction, the length of the second pipe is equal to the length of the first pipe; the opposite ends of the first pipe along the first direction are heat-fusion ends, and the opposite ends of the second pipe along the first direction are heat-fusion ends.

5. The anchor according to claim 1, characterized in that, The anchor also includes a plurality of connecting parts, which are circumferentially spaced within the receiving cavity. One end of each connecting part is connected to the inner sidewall and the other end is connected to the outer sidewall. The flow channel is formed between two adjacent connecting parts.

6. The anchor according to claim 1, characterized in that, The anchor also includes a connecting part, which is disposed circumferentially within the receiving cavity, with one end of the connecting part connected to the inner sidewall and the other end connected to the outer sidewall; The connecting part has the flow channel.

7. The anchor according to claim 5 or 6, characterized in that, The connecting part is integrally formed with the inner sidewall and the outer sidewall.

8. The anchor according to claim 1, characterized in that, The anchor also includes a support portion disposed within the receiving cavity, with one end of the support portion connected to the inner sidewall and the other end connected to the outer sidewall; The support extends along the first direction from one end of the first pipe to the other end of the first pipe.

9. The anchor according to claim 8, characterized in that, The support part has a fan-shaped structure, and the arc range R of the support part satisfies: 1 / 4π≤R≤3 / 4π.

10. The anchor according to claim 1, characterized in that, The anchor also includes a detection unit, which is disposed within the receiving cavity at the end position of the second pipe.

11. The anchor according to claim 1, characterized in that, The first pipe includes a pipe wall, the pipe wall having an inner sidewall and a connecting wall, the connecting wall and the inner sidewall being disposed opposite to each other; The anchor also includes a stop portion, which is circumferentially disposed on the connecting wall.

12. A double-layer piping system, characterized in that, include: The anchor as claimed in any one of claims 1 to 11; An outer pipe having a cavity extending through opposite ends of the outer pipe along the first direction, the end of the outer pipe being connected to the end of the first pipe; An inner pipe is disposed within the cavity, and the end of the inner pipe is connected to the end of the second pipe; Both the outer pipe and the inner pipe are made of plastic.

13. The double-layer piping system according to claim 12, characterized in that, The double-layer piping system further includes an electrofusion sleeve. Along the first direction, the length of the second pipe is greater than the length of the first pipe. The ends of the inner pipe and the second pipe can be thermally fused together. The electrofusion sleeve is disposed at the connection between the ends of the outer pipe and the first pipe, so that the ends of the outer pipe and the first pipe can be electrofused together.

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