Device and method for coating material on inner wall of pipeline

Abstract

The present application provides a device and method for coating materials on the inner wall of a pipeline. The device for coating materials on the inner wall of a pipeline includes: a sealing section, having a first end face and a second end face relative to each other; a connecting member, including a first end and a second end relative to each other, the first end being connected to the second end face; a pushing section, having a third end face and a fourth end face relative to each other, the second end being connected to the third end face, and a space for accommodating coating materials between the second end face and the third end face; a pushing member connected to the fourth end face, wherein the pushing member is suitable for pushing the pushing section when the coating material is coated on the inner wall of the pipeline, and during the coating process, the coating material is extruded from the gap between the pushing section and the inner wall of the pipeline and coated on the inner wall of the pipeline. The device of the present application can coat a uniform and continuous layer of coating material on the inner wall of the pipeline by extruding the coating material from the gap between the pushing section and the inner wall of the pipeline and coating it on the inner wall of the pipeline.

Description

Technical Field

[0001] The present application mainly relates to the field of nuclear technology, and in particular to a device and method for coating a material on the inner wall of a pipeline. Background Art

[0002] The heat pipe cooled reactor is a new type of reactor that uses multiple heat pipes to remove the heat from the reactor. The basic principle is to arrange multiple heat pipes in the reactor, transfer the heat generated by the nuclear fuel to the heat pipes, and then transfer it to the heat exchanger and thermoelectric conversion system to generate electricity. In order to improve the heat conduction effect between the heat pipe stack substrate and the heat pipe, it is necessary to fill the gap between the substrate and the heat pipe with material (such as high temperature resistant heat conduction). It is difficult to coat a uniform material layer on the inner wall of the pipe in the substrate with existing technology. How to coat a uniform material layer on the inner wall of the pipe is one of the hot issues in this field. Summary of the invention

[0003] The technical problem to be solved by the present application is to provide a device and a method for coating a material on the inner wall of a pipeline. The device and the method for coating a material on the inner wall of a pipeline.

[0004] To solve the above technical problems, the present application provides a device for coating a material on the inner wall of a pipeline, comprising: a sealing section, having a first end face and a second end face relative to each other; a connecting piece, comprising a first end and a second end relative to each other, the first end being connected to the second end face; a pushing section, having a third end face and a fourth end face relative to each other, the second end being connected to the third end face, and a space for accommodating a coating material being provided between the second end face and the third end face; a pushing piece connected to the fourth end face, wherein the pushing piece is suitable for pushing the pushing section when the coating material is coated on the inner wall of the pipeline, and during the coating process, the coating material is squeezed out from the gap between the pushing section and the inner wall of the pipeline and coated on the inner wall of the pipeline.

[0005] In one embodiment of the present application, the connector is a flexible connector or a rigid connector. When the connector is a flexible connector, during the coating process, the distance between the sealing section and the advancing section gradually decreases as the coating proceeds.

[0006] In one embodiment of the present application, the flexible connection member includes a spring.

[0007] In one embodiment of the present application, the connecting member and the sealing section are detachably connected, and / or the connecting member and the propulsion section are detachably connected.

[0008] In one embodiment of the present application, the device further comprises a first limiting device, and the first limiting device is used to prevent the sealing section from sliding off the inner wall of the pipe.

[0009] In one embodiment of the present application, the first limiting device includes a sealing ring, and the sealing ring is sleeved on the outer circumferential surface of the sealing section.

[0010] In an embodiment of the present application, the third end surface protrudes toward the sealing section.

[0011] In one embodiment of the present application, the third end face is a conical surface, and the cone angle of the cone surface is 5°~175°. When the viscosity of the coating material is greater than 300000 mPa·s, the cone angle is 5°~120°. When the viscosity of the coating material is greater than 500000 mPa·s, the cone angle is between 5°~60°.

[0012] In one embodiment of the present application, the propulsion member and the propulsion section are detachably connected.

[0013] In one embodiment of the present application, the propulsion member includes a second limiting device, and the second limiting device is used to enable the propulsion member to move in a manner parallel to the inner wall of the pipeline.

[0014] In one embodiment of the present application, the propulsion member includes a heat pipe.

[0015] In one embodiment of the present application, the device further comprises a closed shell, which encloses the space between the second end face and the third end face, and the outer peripheral surface of the closed shell comprises an opening for pouring the coating material into the space.

[0016] In one embodiment of the present application, the device further comprises a compression unit, which is connected to the first end surface, wherein during the coating process, the compression unit applies pressure to the sealing section.

[0017] In another aspect, the present application also proposes a method for coating a material on the inner wall of a pipeline, comprising: placing the sealing section of the device described above into the pipeline; pouring the coating material into the space between the sealing section and the propulsion section; and pushing the propulsion member.

[0018] In another aspect, the present application also proposes a method for coating a material on the inner wall of a pipeline, comprising: pouring the coating material into the closed shell of the device as described above; placing the sealing section and the propulsion section into the pipeline; and pushing the propulsion member.

[0019] Compared with the prior art, the device of the present application squeezes the coating material out from the gap between the propulsion section and the inner wall of the pipe and coats it on the inner wall of the pipe, so that a uniform and continuous coating material layer can be coated on the inner wall of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the present application. They are included and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present application and together with the present specification serve to explain the principles of the present application. In the accompanying drawings:

[0021] Figures 1 to 3 is a schematic structural diagram of a device for coating a material on the inner wall of a pipeline in different embodiments of the present application;

[0022] Figure 4 It is a structural schematic diagram of the propulsion section and the second limiting device in one embodiment of the present application;

[0023] Figure 5 and Figure 6 is a schematic structural diagram of a device for coating a material on the inner wall of a pipeline in different embodiments of the present application;

[0024] Figure 7 It is a structural schematic diagram of the propulsion section in one embodiment of the present application.

[0025] Figure numerals: sealing section 110, second end face 111, annular groove 112, connecting member 120, first end 121, second end 122, propulsion section 130, fourth end face 131, third end face 132, propulsion member 140, support rod 141, connecting unit 142, handle 150, closure shell 160 and opening 161. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0027] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0029] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0030] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0031] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0032] Next, the device and method for coating a material on the inner wall of a pipeline of the present application are described through embodiments.

[0033] refer to Figure 1 In one embodiment shown in the figure, a device for coating a material on the inner wall of a pipe (hereinafter referred to as the device) is used. Figure 1 In the embodiment of the present invention, the device includes a sealing section 110, a connecting member 120, a pushing section 130 and a pushing member 140.

[0034] Specifically, the sealing section 110 has a first end surface and a second end surface 111 opposite to each other. Figure 1 In the embodiment, the sealing section 110 is a cylinder, and it should be understood that the shape of the sealing section 110 is not limited to a cylinder. When the sealing section 110 is a cylinder, the diameter of the sealing section 110 can be equal to the inner diameter of the pipe 10, or slightly smaller than the inner diameter of the pipe 10.

[0035] The connecting member 120 has a first end 121 and a second end 122 opposite to each other, and the first end 121 is connected to the second end surface 111. The connection between the connecting member 120 and the sealing section 110 can be a fixed connection or a detachable connection, for example, by threaded bolt connection.

[0036] The propulsion section 130 has a third end face and a fourth end face 131 opposite to each other. Figure 1 In the figure, the propulsion section 130 is a cylinder. It should be understood that the shape of the propulsion section 130 is not limited to a cylinder. When the propulsion section 130 is a cylinder, the diameter of the propulsion section 130 is smaller than the inner diameter of the pipe 10, or there is a gap between the outer peripheral surface of the propulsion section 130 and the inner wall of the pipe 10. The thickness of the coating material layer coated on the inner wall of the pipe 10 can be adjusted by adjusting the size of the gap. The second end 122 of the connector 120 is connected to the third end face. The connection between the connector 120 and the propulsion section 130 can be a fixed connection or a detachable connection, such as a threaded bolt connection. By connecting the sealing section 110 and the propulsion section 130 through the connector 120, the two can be always connected together during the coating process, which reduces the requirements for the operating space and can also recycle the device.

[0037] like Figure 1 As shown, there is a space for accommodating the coating material between the sealing section 110 and the advancing section 130, or between the second end surface 111 and the third end surface. The coating material of the present application may include colloid or high temperature resistant thermal conductive filler.

[0038] The propulsion member 140 is connected to the fourth end face 131, and the propulsion member 140 may be a rod-shaped object. The connection between the propulsion member 140 and the propulsion section 130 may be a fixed connection or a detachable connection, such as a threaded bolt connection. When the device of the present application is working, there is a gap between the propulsion section 130 and the inner wall of the pipeline 10. The operator drives the propulsion section 130 toward the sealing section 110 by pushing the propulsion member 140. During the movement of the propulsion section 130, the coating material in the space between the sealing section 110 and the propulsion section 130 is squeezed out from the gap between the propulsion section 130 and the pipeline 10 and coated on the inner wall of the pipeline 10.

[0039] There are many pipes 10 with small radial dimensions in a heat pipe cooled reactor (referred to as heat pipe stack). It is difficult to evenly coat the inner wall of the pipe 10 with a coating material in the prior art. The device of the present application extrude the coating material from the gap between the propulsion section 130 and the inner wall of the pipe 10 and coats it on the inner wall of the pipe 10, so that a uniform and continuous coating material layer can be coated on the inner wall of the pipe 10.

[0040] refer to Figure 1 and Figure 2 As shown, in Figure 1 In the embodiment, the connector 120 is a flexible connector, for example, the connector 120 is a spring. When the connector 120 is a flexible connector, as the device is advanced in the pipeline 10, the coating material between the sealing section 110 and the advancing section 130 gradually decreases. Since the connector 120 is a flexible material, the distance between the sealing section 110 and the advancing section 130 will also gradually decrease, so that the space between the sealing section 110 and the advancing section 130 can always be filled with the coating material, which can keep the flow rate of the coating material squeezed out of the gap between the advancing section 130 and the pipeline 10 consistent, thereby improving the uniformity of the coating. Figure 2 In the embodiment, the connecting member 120 is a rigid connection.

[0041] refer to Figure 3 As shown, in one embodiment, a handle 150 is connected to one end of the propulsion member 140 away from the propulsion section 130 , and the handle 150 is helpful for an operator to operate the propulsion member 140 .

[0042] refer to Figure 4As shown, in one embodiment, the propeller 140 includes a second limiting device, and the second limiting device is used to make the propeller 140 move in a manner parallel to the inner wall of the pipeline. Specifically, the second limiting device includes three support rods 141 and a connecting unit 142. Preferably, the three support rods 141 are parallel to each other, one end of the three support rods 141 is connected to the propulsion section 130, and the connecting unit 142 connects the three support rods 141 in the radial direction of the support rods 141. It should be noted that the number of support rods 141 is not limited to 3 and can be set according to requirements. During the coating process, since the distance between the support rod 141 and the inner wall of the pipeline 10 is small, the support rod 141 can be avoided from tilting and causing the gap size between the propulsion section 130 and the inner wall of the pipeline 10 to be uneven. It should be noted that the structure of the second limiting device of the present application is not limited to the above embodiment, and any structure that can avoid the tilting of the support rod 141 and cause the gap size between the propulsion section 130 and the inner wall of the pipeline 10 to be uneven is within the protection scope of the present application.

[0043] refer to Figure 6 As shown, in one embodiment, the device further includes a closed shell 160. The closed shell 160 encloses the space between the second end face and the third end face, and has an opening 161 on the outer circumference of the closed shell 160 for pouring the coating material into the space. The size of the closed shell 160 meets the requirement of being inserted into the pipeline. Before coating, the coating material is poured into the closed shell 160 through the opening 161. After the pouring is completed, the opening 161 is closed; then, the sealing section 110 and the propulsion section 130 are placed in the pipeline; then, the closed shell 160 is pulled out. The use of the closed shell 160 can complete the pouring of the coating material before coating, thereby shortening the on-site construction time.

[0044] Continue to refer Figure 6 As shown, in one embodiment, the third end face 132 is a conical surface, and the conical surface protrudes toward the sealing section 110, and the cone angle of the conical surface can be 5°~175°, for example, the cone angle is 5°, 25°, 45°, 65°, 85°, 105°, 125°, 145°, 165°, 175°. When the viscosity of the coating material is greater than 300000 mPa·s, the cone angle can be 5°~120°, for example, the cone angle is 5°, 25°, 45°, 65°, 85°, 105° or 120°; when the viscosity of the coating material is greater than 500000 mPa·s, the cone angle can be between 5° and 60°, for example, the cone angle is 5°, 25°, 45° or 60°. It should be noted that the third end face 132 can also be other structures protruding toward the sealing section 110, for example, the third end face 132 can be a spherical surface. The third end surface 132 protrudes toward the sealing section 110 to help reduce the resistance of advancement.

[0045] Continue to refer Figure 6As shown, in one embodiment, the pusher 140 includes a heat pipe. Using the heat pipe as the pusher has such a technical effect: the heat pipe is installed in the pipeline 10 while the coating is completed, and the coating material fills the gap between the heat pipe and the pipeline.

[0046] refer to Figure 6 As shown, in one embodiment, the device further comprises a compression unit 170. The compression unit 170 is connected to the first end surface, and the compression unit 170 can be a spring. During the coating process, the compression unit 170 applies pressure to the sealing section 110, so that the space between the sealing section 110 and the advancing section 130 can always be filled with the coating material.

[0047] In one embodiment, the device further comprises a first limiting device, which is used to prevent the sealing section from sliding off the inner wall of the pipe. Figure 7 As shown, in one embodiment, the first limiting device includes a sealing ring (not shown), which is sleeved on the outer circumferential surface of the sealing section 110. An annular groove 112 may be provided on the outer circumferential surface of the sealing section 110, and a part of the sealing ring is embedded in the annular groove 112.

[0048] On the other hand, the present application also proposes a method for coating a material on the inner wall of a pipeline, the method comprising the following steps S210 to S230:

[0049] Step S210: placing the sealing section of the device described above into the pipeline;

[0050] Step S210: pouring coating material into the space between the sealing section and the advancing section;

[0051] Step S210: pushing the pushing member.

[0052] Specifically, refer to Figure 1 As shown, the sealing section 110 of the device described above is placed in the pipeline 10, and the pushing section 130 is located outside the pipeline 10. In this state, part of the space between the sealing section 110 and the pushing section 130 is located inside the pipeline 10, and the remaining part is located outside the pipeline 10. The coating material is poured into the pipeline 10. After the pouring is completed, the pushing section 130 is pushed into the pipeline 10, and then the pushing member 140 can be pushed to perform coating.

[0053] On the other hand, the present application also proposes a method for coating a material on the inner wall of a pipeline, the method comprising the following steps S310 to S340:

[0054] Step S310: pouring coating material into the closed shell of the device as described above;

[0055] Step S320: placing the sealing section and the pushing section into the pipeline;

[0056] Step S330: extracting the sealing shell;

[0057] Step S340: pushing the pushing member.

[0058] Specifically, refer to Figure 5 As shown, the sealing shell 160 encloses the space between the second end face and the third end face. The outer peripheral surface of the sealing shell 160 has an opening 161 for pouring the coating material into the space, and the coating material is poured into the sealing shell 160 through the opening 161; after the pouring is completed, the opening 161 is closed; then, the sealing section 110 and the pushing section 130 are placed in the pipeline; then, the sealing shell 160 is pulled out, and the pushing member 140 can be pushed to perform coating.

[0059] The basic concepts have been described above. Obviously, for those skilled in the art, the above application disclosure is only an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0060] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0061] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more application embodiments, in the above description of the embodiments of this application, multiple features are sometimes merged into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0062] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used for the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which can be changed according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the method of general digit retention. Although the numerical domains and parameters used to confirm the breadth of the range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0063] Although the present application has been described with reference to the current specific embodiments, ordinary technicians in this technical field should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions may be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the essential spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A device for coating a material on the inner wall of a pipeline, characterized in that: include: A sealing section having a first end surface and a second end surface opposite to each other; A connecting member, comprising a first end and a second end opposite to each other, wherein the first end is connected to the second end surface, and the connecting member is a flexible connecting member, and the flexible connecting member comprises a spring; The advancing section has a third end face and a fourth end face opposite to each other, the second end is connected to the third end face, and there is a space for accommodating the coating material between the second end face and the third end face; a pushing member connected to the fourth end face, the pushing member being adapted to push the pushing section when the coating material is coated on the inner wall of the pipeline, wherein during the coating process, the coating material is extruded from a gap between the pushing section and the inner wall of the pipeline and coated on the inner wall of the pipeline; A closing shell, wherein the closing shell encloses the space between the second end face and the third end face, and has an opening on the outer peripheral surface of the closing shell for pouring the coating material into the space, wherein the closing shell is pulled out after the sealing section and the propulsion section are placed in the pipe, and during the coating process, the distance between the sealing section and the propulsion section gradually decreases as the coating proceeds.

2. The device according to claim 1, characterized in that The connection between the connecting piece and the sealing section is detachable, and / or the connection between the connecting piece and the propulsion section is detachable.

3. The device according to claim 1, characterized in that It also includes a first limiting device, which is used to prevent the sealing section from sliding off the inner wall of the pipeline.

4. The device according to claim 3, characterized in that The first limiting device comprises a sealing ring, and the sealing ring is sleeved on the outer peripheral surface of the sealing section.

5. The device according to claim 1, characterized in that The third end surface protrudes toward the sealing section.

6. The device according to claim 5, characterized in that The third end face is a conical surface, and the cone angle of the cone surface is 5°~175°. When the viscosity of the coating material is greater than 300000 mPa·s, the cone angle is 5°~120°. When the viscosity of the coating material is greater than 500000 mPa·s, the cone angle is between 5°~60°.

7. The device according to claim 1, characterized in that The propulsion member and the propulsion section are detachably connected.

8. The device according to claim 1, characterized in that The propulsion member comprises a second limiting device, and the second limiting device is used to enable the propulsion member to move in a manner parallel to the inner wall of the pipeline.

9. The device according to claim 1, characterized in that The propulsion member includes a heat pipe.

10. The device according to claim 1, characterized in that It also includes a compression unit connected to the first end surface, wherein during the coating process, the compression unit applies pressure to the sealing section.

11. A method for coating a material on the inner wall of a pipeline, characterized in that: include: Pouring the coating material into the closed shell according to any one of claims 1 to 10; placing the sealing section and the advancing section into the pipeline; Pulling out the closed shell; The pusher is pushed.

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