Positioning device for assembly of pipe parts

Abstract

This application relates to a positioning device for assembling pipe components. The positioning device includes a first positioning member, a plurality of second positioning members, and a first adjusting member. The first positioning member is connected within a first through hole, and its axis is collinear with the axis of the pipe connector. The plurality of second positioning members are circumferentially distributed around the axis of the first positioning member and are located within the inner cavity of a first pipe. Under the action of the first adjusting member, the plurality of second positioning members move radially along the first positioning member and abut against the inner wall of the first pipe, thereby defining the position of the first pipe on one end face of the pipe connector. The positioning device provided according to this application enables the positioning of the first pipe before assembly, thereby ensuring the coaxiality between the first pipe and the pipe connector. This positioning device not only improves the assembly efficiency of pipe components but also ensures the assembly accuracy of pipe components.

Description

Technical Field

[0001] This application relates to the field of superconducting magnet technology, and in particular to a positioning device for assembling pipe parts. Background Technology

[0002] Superconducting magnets have wide applications in medicine, military, transportation, scientific research, and many other fields, with significant practical benefits already achieved. For example, superconducting magnet magnetic resonance imaging (MRI) devices have become one of the most popular clinical diagnostic devices in hospitals, with thousands of such devices already in use in hospitals worldwide.

[0003] Superconducting magnet devices typically use liquid helium as a cooling medium to maintain the superconducting environment of the superconducting coils. Although superconducting magnet devices have a multi-layered vacuum insulation structure, heat leakage cannot be completely avoided. Superconducting magnet devices are generally equipped with a cooling system to continuously provide cooling. The cold head in the cooling system is used to provide cooling for the ultra-low temperature environment in the superconducting magnet to maintain the superconducting environment of the superconducting coils.

[0004] The cold head is located inside the cold head container. Generally, the cold head container is formed by welding metal pipes and pipe connectors. However, it is difficult to control the coaxiality of the pipes and pipe connectors during the assembly process. Insufficient coaxiality between the pipes and pipe connectors will cause the leak test to fail, requiring rework, which not only greatly increases the assembly cost but also reduces the assembly efficiency. Summary of the Invention

[0005] In view of this, the present application provides a positioning device for assembling pipe parts to solve at least one problem existing in the background art.

[0006] In a first aspect, embodiments of this application provide a positioning device for assembling pipe components, the pipe components including a first pipe and a pipe connector, the pipe connector having a first through hole, the positioning device being used to define the position of the first pipe on the pipe connector, the positioning device comprising:

[0007] A first positioning element is used to connect to the first through hole. When the pipe parts are assembled using the positioning device, the axis of the first positioning element is collinear with the axis of the pipe connector.

[0008] A plurality of second positioning elements are connected to the first positioning element and are circumferentially distributed around the axis of the first positioning element. When the pipe parts are assembled using the positioning device, the plurality of second positioning elements are located in the inner cavity of the first pipe.

[0009] A first adjusting member is detachably connected to the plurality of second positioning members. Under the action of the first adjusting member, the plurality of second positioning members move radially along the first positioning member and abut against the inner wall of the first pipe to define the position of the first pipe on one end face of the pipe connector.

[0010] In conjunction with a first aspect of this application, in an alternative embodiment, the contour shape formed by the outer edges of the plurality of second positioning members away from the axis of the first positioning member is used to match the inner wall of the first tube, such that the plurality of second positioning members define the shape of the first tube.

[0011] In conjunction with the first aspect of this application, in an optional embodiment, when the first tube is a circular tube, the second positioning member includes a first support block, the orthographic projection of the edges of the plurality of first support blocks away from the axis of the first positioning member along the axis of the first positioning member overlaps with the same circle, and the plurality of first support blocks move radially along the circular tube and abut against the inner wall of the circular tube under the action of the first adjusting member.

[0012] In conjunction with the first aspect of this application, in an optional embodiment, when the first tube is a square tube, the second positioning member includes a second support block. The orthographic projection of the edges of the plurality of second support blocks away from the axis of the first positioning member along the axis of the first positioning member overlaps with the same rectangle. Under the action of the first adjusting member, the plurality of second support blocks move along the diagonal direction of the square tube and abut against the inner wall of the square tube.

[0013] In conjunction with the first aspect of this application, in an optional embodiment, the first adjusting member includes:

[0014] A guide post, which is connected to the first positioning member, and the axis of the guide post is collinear with the axis of the first positioning member;

[0015] A first motion conversion component is fitted onto the guide post and is capable of moving along the axial direction of the guide post;

[0016] The movement of the first motion conversion component along its axis enables the plurality of second positioning components to move radially along the first positioning component and abut against the inner wall of the first tube.

[0017] In conjunction with the first aspect of this application, in an optional embodiment, the first adjusting member further includes:

[0018] A first locking member is fitted onto the guide post and matches the guide post. The first locking member is used to lock or adjust the movement of the first motion conversion member in the axial direction of the guide post.

[0019] In conjunction with the first aspect of this application, in an optional embodiment, the first motion conversion member has a first inclined surface, and the second positioning member has a second inclined surface that matches the first inclined surface;

[0020] The axial motion of the first motion conversion component is converted into the radial motion of the second positioning component under the action of the first inclined surface and the second inclined surface.

[0021] In conjunction with the first aspect of this application, in an alternative embodiment, the height of the first inclined surface is less than the height of the second inclined surface along the axial direction of the guide post.

[0022] In conjunction with the first aspect of this application, in an optional embodiment, the positioning device further includes:

[0023] A first guide and a second guide are slidably connected. One of the first guide and the second guide is located on the side of the second positioning member close to the first positioning member, and the other of the first guide and the second guide is located on the side of the first positioning member close to the second positioning member. The second positioning member moves radially along the first positioning member under the guidance of the first guide or the second guide.

[0024] In conjunction with the first aspect of this application, in an optional embodiment, the second positioning member has a first groove on the side near the first positioning member, and the first groove is formed with the first guide member;

[0025] The first positioning member has a guide rod on the side near the second positioning member, the guide rod extending radially along the first positioning member, and the guide rod forming the second guide member.

[0026] In conjunction with the first aspect of this application, in an optional embodiment, the pipe fitting further includes a second pipe, the second pipe and the first pipe being located at opposite ends of the pipe connector, and the positioning device is further configured to define the position of the second pipe on the pipe connector, the positioning device further including:

[0027] A plurality of third positioning elements are connected to the first positioning element and are circumferentially distributed around the axis of the first positioning element.

[0028] The first adjusting member can also be connected to the plurality of third positioning members. When the pipe parts are assembled using the positioning device, the plurality of third positioning members are located in the inner cavity of the second pipe. Under the action of the first adjusting member, the plurality of third positioning members move radially along the first positioning member and abut against the inner wall of the second pipe to define the position of the second pipe on the other end face of the pipe connector.

[0029] The positioning device for assembling pipe parts provided in this application uses a first adjusting member in the positioning device to act on multiple second positioning members, so that the multiple second positioning members abut against the inner wall of the first pipe, thereby positioning the first pipe before assembly and ensuring the coaxiality between the first pipe and the pipe connector. This positioning device can not only improve the assembly efficiency of pipe parts, but also ensure the assembly accuracy of pipe parts.

[0030] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0032] Figure 1 A schematic diagram of the structure of the first pipe and the pipe connector in the positioning device for assembling pipe parts provided in the embodiments of this application;

[0033] Figure 2 This is an overall top view of the process of positioning a circular pipe using the positioning device for assembling pipe parts provided in the embodiments of this application;

[0034] Figure 3 for Figure 2 Sectional view at point AA;

[0035] Figure 4 To utilize another embodiment of this application, a top view is provided of a positioning device for assembling pipe components in a positioning square tube state;

[0036] Figure 5 A three-dimensional structural schematic diagram of a positioning device for assembling pipe parts is provided for one embodiment of this application;

[0037] Figure 6 A three-dimensional structural schematic diagram of the first support block in a positioning device for assembling pipe parts is provided for the embodiments of this application;

[0038] Figure 7A three-dimensional structural schematic diagram of a first motion conversion element in a positioning device for assembling pipe parts is provided for an embodiment of this application;

[0039] Figure 8 A three-dimensional structural schematic diagram of the second support block in a positioning device for assembling pipe parts is provided for another embodiment of this application;

[0040] Figure 9 for Figure 3 Enlarged view of point A in the middle;

[0041] Figure 10 A three-dimensional structural schematic diagram of the first positioning element in a positioning device for assembling pipe parts is provided for the embodiments of this application;

[0042] Figure 11 A top view of a first positioning member and a rectangular connector in a positioning device for assembling pipe parts is provided for another embodiment of this application;

[0043] Figure 12 A three-dimensional structural schematic diagram of a positioning device for assembling pipe parts (square pipe) is provided for another embodiment of this application;

[0044] Figure 13 A cross-sectional view showing a positioning device for assembling pipe components, used in another embodiment of this application, simultaneously positioning a first pipe and a second pipe.

[0045] Figure label:

[0046] a1, circular tube; b1, circular connector; c1, second tube; a2, square tube; b2, rectangular connector;

[0047] 10. First positioning component; 110. Main body; 120. Flange; 121. Guide rod;

[0048] 20. Second positioning component; 2a. First support block; 2a1. Second inclined surface; 2b. Second support block; 2b1. First sliding groove; 2b2. Third inclined surface; 21. Third positioning component;

[0049] 30. First adjusting component; 310. Guide post; 320. First locking component; 330. First motion conversion component; 331. Frustum; 3311. First inclined surface; 340. Second motion conversion component; 350. Second locking component. Detailed Implementation

[0050] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the specific embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the disclosure of the present application to those skilled in the art.

[0051] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, to avoid confusion with this application, some technical features well-known in the art have not been described; that is, not all features of actual embodiments are described herein, nor are well-known functions and structures described in detail.

[0052] In the accompanying drawings, for clarity, the dimensions of layers, areas, and elements, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.

[0053] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this application, the first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion. And the discussion of a second element, component, area, layer, or portion does not imply that the first element, component, area, layer, or portion necessarily exists in this application.

[0054] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.

[0055] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0056] To fully understand this application, detailed steps and structures will be presented in the following description to illustrate the technical solution of this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.

[0057] Generally, cold-head containers form a cryogenic chamber through welding. The assembly precision between the various pipe components that make up the cold-head container plays a crucial role in the reliability and stability of the conductive connections between these components in cryogenic environments. Ensuring the coaxiality of pipes and pipe fittings during assembly is challenging, and insufficient coaxiality can lead to leak detection failures.

[0058] To address the aforementioned technical problems, this application provides a positioning device for assembling pipe components. During the assembly of pipe components, a first adjusting member 30 in the positioning device adjusts a plurality of second positioning members 20, causing the plurality of second positioning members 20 to abut against the inner wall of the first pipe, thereby limiting the position of the first pipe on the pipe connector, thus ensuring the coaxiality of the first pipe and the pipe connector, and further improving the assembly efficiency and assembly accuracy of the pipe components.

[0059] The positioning device for assembling pipe parts provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0060] The pipe fitting includes a first pipe and a pipe connector. One end of the first pipe is connected to the pipe connector, and the pipe connector has a first through hole. After the first pipe and the pipe connector are assembled, the first through hole communicates with the inner cavity of the first pipe. As an example, the first pipe is connected to the pipe connector by welding. Before welding, the positioning device provided in this application embodiment is used to define the position of the first pipe on the pipe connector. The first pipe includes a circular pipe a1, and the pipe connector includes a circular connector b1, such as... Figure 1 As shown, Figure 1 The diagram shows a schematic of the assembled circular pipe a1 and circular connector b1. The first pipe may also include square pipes and other shapes, and the shape of the pipe connector corresponds to the shape of the first pipe.

[0061] Specifically, such as Figure 2 and Figure 3 As shown in the figure, this application provides a positioning device for assembling pipe parts. The positioning device includes a first positioning element 10, a plurality of second positioning elements 20 and a first adjusting element 30.

[0062] The first positioning element 10 is used to connect to the first through hole. When the pipe parts are assembled using the positioning device, the axis of the first positioning element 10 is collinear with the axis of the pipe connector.

[0063] Multiple second positioning elements 20 are connected to the first positioning element 10. The multiple second positioning elements 20 are circumferentially distributed around the axis of the first positioning element 10. When the pipe parts are assembled using the positioning device, the multiple second positioning elements 20 are located in the inner cavity of the first pipe.

[0064] The first adjusting member 30 is detachably connected to a plurality of second positioning members 20. Under the action of the first adjusting member 30, the plurality of second positioning members 20 move radially along the first positioning member 10 and abut against the inner wall of the first pipe to limit the position of the first pipe on one end face of the pipe connector.

[0065] In this embodiment, the first positioning member 10 is embedded in the first through hole of the pipe connector to be assembled, such that the axis of the first positioning member 10 is collinear with the axis of the pipe connector. After the assembly of the first pipe and the pipe connector is completed, for example after welding, the first positioning member 10 can be removed from the first through hole. Multiple second positioning members 20 are circumferentially distributed around the axis of the first positioning member 10, and under the action of the first adjusting member 30, the multiple second positioning members 20 move radially along the first positioning member 10 and abut against different positions on the inner wall of the first pipe, defining the position of the first pipe on the pipe connector and ensuring the coaxiality of the first pipe and the first positioning member 10, further ensuring the coaxiality of the first pipe and the pipe connector.

[0066] The first adjusting member 30 is connected to the multiple second positioning members 20 in the initial state, or there may be a gap between the first adjusting member 30 and the multiple second positioning members 20 in the initial state. When it is necessary to use the second positioning members 20 to adjust the position of the first pipe on the pipe connector, the first adjusting member 30 acts on the multiple second positioning members 20.

[0067] The thinner the pipes in the cold head container, the less heat leakage can be reduced. However, thinner pipe components are in a deformed state without other support. A lot of manpower and resources are needed for calibration during the assembly process. For example, a circular pipe a1 will be deformed into an ellipse. It is difficult to ensure the roundness of the circular pipe a1 during the assembly process, which greatly affects the assembly efficiency and assembly accuracy.

[0068] To address the aforementioned technical problems, this application embodiment sets the outline shape of the outer edges of the plurality of second positioning members 20 to match the inner wall of the first pipe, so that when the plurality of second positioning members 20 abut against the inner wall of the first pipe, they can shape the first pipe, ensuring that the first pipe is assembled onto the pipe connector under the premise that its measurement parameters (such as the roundness of the first pipe) are qualified. This avoids deformation due to the thinness of the first pipe affecting the assembly accuracy. In addition, this positioning device can also improve the assembly efficiency of pipe parts.

[0069] Specifically, such as Figure 2 and Figure 4 As shown, the outline shape formed by the outer edges of the plurality of second positioning members 20 away from the axis of the first positioning member 10 is used to match the inner wall of the first tube, so that the plurality of second positioning members 20 define the shape of the first tube.

[0070] This can be understood as using the contour shape formed by the outer edges of multiple second positioning elements 20 to define the shape of the first tube, so that the various measurement parameters of the first tube can be qualified.

[0071] In an optional embodiment, a plurality of second positioning members 20 move radially along the first positioning member 10 under the action of the first adjusting member 30, so that the edges of the plurality of second positioning members 20, after expanding outward by a first distance in the orthographic projection along the axial direction of the first positioning member 10, can overlap or partially overlap with the orthographic projection of the first tube. The specific value of the first distance can be set according to specific circumstances, and this embodiment does not limit it. Furthermore, after the plurality of second positioning members 20 move radially along the first positioning member 10, the orthographic projection of the edges of the plurality of second positioning members 20 can be a closed shape, overlapping with the orthographic projection of the inner wall of the first tube. Since the inner wall of the first tube is very thin, the inner wall of the first tube also basically overlaps with the outer wall of the first tube, for example, a circle or a rectangle. Alternatively, they can be a dispersed shape, which can be understood as multiple partial regions of a closed shape, for example: Figure 2 The diagram shows multiple arcs, which partially overlap with the orthographic projection of the first tube.

[0072] In an alternative embodiment, such as Figure 2 As shown, in the state where the first tube is a circular tube a1, the second positioning member 20 includes a first support block 2a. The orthographic projection of the edges of the multiple first support blocks 2a away from the axis of the first positioning member 10 along the axis of the first positioning member 10 overlaps with the same circle. Under the action of the first adjusting member 30, the multiple first support blocks 2a move radially along the circular tube a1 and abut against the inner wall of the circular tube a1.

[0073] When the first tube to be assembled is a circular tube a1, the shape of the first support block 2a is similar to a fan-shaped structure. The end of the first support block 2a near the axis of the first positioning member 10 is an irregular fan-shaped structure, but the edge of the first support block 2a away from the axis of the first positioning member 10, when projected onto the axis of the first positioning member 10, is a plurality of arcs, and the plurality of arcs overlap with the same circle. It can be understood that after the plurality of first support blocks 2a move simultaneously along the radial direction of the first positioning member 10, they can abut against the inner wall of the circular tube a1 and define the shape of the circular tube a1.

[0074] In an alternative embodiment, such as Figure 4 As shown, in the state where the first tube is a square tube a2, the second positioning member 20 includes a second support block 2b. The orthographic projection of the edges of the multiple second support blocks 2b away from the axis of the first positioning member 10 along the axis of the first positioning member 10 overlaps with the same rectangle. Under the action of the first adjusting member 30, the multiple second support blocks 2b move along the diagonal direction of the square tube a2 and abut against the inner wall of the square tube a2.

[0075] Specifically, there are four second support blocks 2b. Under the action of the first adjusting member 30, the four second support blocks 2b move along the diagonal direction of the square tube a2 or the rectangular connector b2, so that the four second support blocks 2b abut against the four apex corners and sides of the square tube a2, thereby shaping the square tube a2.

[0076] like Figure 2 and Figure 4 As shown, when the first pipe is a circular pipe a1, the corresponding pipe connector is a circular connector b1. When the first pipe is a square pipe a2, the corresponding pipe connector is a rectangular connector b2.

[0077] In an alternative embodiment, such as Figure 3 and Figure 5 As shown, the first adjusting member 30 includes a guide post 310 and a first motion conversion member 330. The guide post 310 is connected to the first positioning member 10, and the axis of the guide post 310 is collinear with the axis of the first positioning member 10. The first motion conversion member 330 is fitted onto the guide post 310 and can move along the axial direction of the guide post 310. The movement of the first motion conversion member 330 along its axis causes the plurality of second positioning members 20 to move radially along the first positioning member 10 and abut against the inner wall of the first tube.

[0078] In this embodiment, a guide post 310 guides the axial movement of the first motion conversion member 330, and the axis of the guide post 310 is collinear with the axis of the first positioning member 10. This allows the first motion conversion member 330 to simultaneously contact multiple second positioning members 20 during axial movement, further enabling the multiple second positioning members 20 to be simultaneously stressed and move synchronously. The synchronous movement of multiple second positioning members 20 ensures the consistency of their outer edge contour shape, thereby improving the accuracy of the second positioning members 20 in shaping the first tube.

[0079] In an alternative embodiment, such as Figure 3 and Figure 5 As shown, the first adjusting member 30 also includes a first locking member 320, which is fitted onto the guide post 310. The first locking member 320 matches the guide post 310 and is used to lock or adjust the movement of the first motion conversion member 330 in the axial direction of the guide post 310.

[0080] By adjusting the locking element, the position of the first motion conversion element 330 on the guide post 310 can be further adjusted, thereby improving the ease of adjustment and thus improving the assembly efficiency.

[0081] In an optional embodiment, the first locking member 320 includes a nut, and the outer wall of the end of the guide post 310 is provided with a thread that matches the nut. The position of the first moving rotating member on the guide post 310 is adjusted or locked by rotating the nut.

[0082] In an alternative embodiment, such as Figure 6 and Figure 7 As shown, the first motion conversion member 330 has a first inclined surface 3311, and the second positioning member 20 has a second inclined surface 2a1 that matches the first inclined surface 3311.

[0083] The axial motion of the first motion conversion component 330 is converted into the radial motion of the second positioning component 20 under the action of the first inclined surface 3311 and the second inclined surface 2a1. The first motion conversion component 330 has a frustum 331, and the side of the frustum 331 forms the first inclined surface 3311.

[0084] Figure 6 The diagram shows the structure of the first support block 2a. Figure 7 A schematic diagram of the structure of the first motion conversion element 330 is shown. Figure 3 As shown, when the first motion conversion member 330 moves along its axial direction, the first inclined surface 3311 abuts against the second inclined surface 2a1, and the force transmission between the first inclined surface 3311 and the second inclined surface 2a1 causes the second positioning member 20 to move. Figure 8 The image shows a third inclined surface 2b2 on the second support block 2b. When the first tube is a square tube a2, the third inclined surface 2b2 matches the first inclined surface 3311 to transmit force during the contact process.

[0085] It should be noted that, during the positioning process of the circular tube a1 and the square tube a2 using the positioning device, the differences between the positioning devices for positioning the circular tube a1 and the square tube a2 include: the shape of the second positioning element 20 and the structure of the first guide element and the second guide element. The first positioning element 10 and the first adjusting element 30 in the positioning device have the same structure.

[0086] In an alternative embodiment, such as Figure 9 As shown, along the axial direction of the guide post 310, the height of the first inclined surface 3311 is less than the height of the second inclined surface 2a1.

[0087] The height of the first inclined plane 3311 is... Figure 9 The height of h1 shown is less than the height of the second inclined plane 2a1. Figure 9 The h2 shown in the figure enables the first motion conversion element 330 to always act on the second positioning element 20.

[0088] Conversely, if the height of the first inclined plane 3311 is greater than the height of the second inclined plane 2a1, there will be a situation during the adjustment process where part of the first inclined plane 3311 cannot abut against the second inclined plane 2a1, and effective adjustment cannot be achieved.

[0089] In an alternative embodiment, such as Figure 3 and Figure 10 As shown, the first positioning element 10 includes a body 110 and a flange 120, which are integrally formed. The body 110 is used to be fitted into the first through hole, and the flange 120 is connected to the surface of the pipe connector. Since the first positioning element 10 needs to be removed from the first through hole after the assembly of the first pipe and the pipe connector is completed, the first positioning element 10 and the pipe connector are detachably connected. The flange 120 can improve the connection effect between the first positioning element 10 and the pipe connector, further improving the positioning efficiency of the first pipe and the pipe connector.

[0090] In an optional embodiment, the positioning device further includes a first guide and a second guide, which are slidably connected. One of the first guide and the second guide is located on the side of the second positioning member 20 close to the first positioning member 10, and the other of the first guide and the second guide is located on the side of the first positioning member 10 close to the second positioning member 20. The second positioning member 20 moves along the radial direction of the first positioning member 10 under the guidance of the first guide or the second guide.

[0091] The use of the first guide and the second guide can ensure the movement accuracy of the second positioning member 20 along the radial direction of the first positioning member 10, and avoid the instability of the movement direction of the second positioning member 20 affecting the shaping accuracy of the first tube.

[0092] In an alternative embodiment, such as Figure 8 , Figure 11 and Figure 12 As shown, the second positioning member 20 has a first groove 2b1 on the side close to the first positioning member 10, and the first groove 2b1 forms a first guide member.

[0093] The first positioning member 10 has a guide rod 121 on the side near the second positioning member 20. The guide rod 121 extends radially along the first positioning member 10 and forms a second guide.

[0094] like Figure 8 The image shows the first groove 2b1 provided on the second support block 2b. Figure 11 The diagram shows a guide rod 121 formed by the extension of the first positioning member 10. When the plurality of second support blocks 2b are subjected to force, the plurality of second support blocks 2b move along the direction of the guide rod 121.

[0095] In an alternative embodiment, the second positioning member 20 is provided with a slider (not shown in the figure) on the side near the first positioning member 10, and the first positioning member 10 is provided with a plurality of second sliding grooves (not shown in the figure) on the side near the second positioning member 20. The slider is embedded in the second sliding groove, and the second sliding groove extends radially along the first positioning member 10.

[0096] In an alternative embodiment, such as Figure 13 As shown, the pipe fitting also includes a second pipe c1, which is located on both sides of the pipe connector, along with the first pipe. The positioning device is also used to define the position of the second pipe c1 on the pipe connector. The positioning device also includes a plurality of third positioning elements 21, which are connected to the first positioning element 10 and are circumferentially distributed around the axis of the first positioning element 10.

[0097] The first adjusting member 30 can also be connected to a plurality of third positioning members 21. When the pipe parts are assembled using the positioning device, the plurality of third positioning members 21 are located in the inner cavity of the second pipe c1. Under the action of the first adjusting member 30, the plurality of third positioning members 21 move radially along the first positioning member 10 and abut against the inner wall of the second pipe c1 to limit the position of the second pipe c1 on the other end face of the pipe connector.

[0098] The cooling system of a superconducting magnet device typically includes a first cold head and a second cold head, which are connected to a first tube and a second tube c1, respectively.

[0099] The principle of positioning the second tube c1 using the positioning device is the same as that of positioning the first tube. Based on the difference in inner diameter between the first tube and the second tube c1, the third positioning component 21 is proportionally reduced or enlarged compared to the second positioning component 20.

[0100] The positioning device can be used to position the first tube and the second tube c1 simultaneously, or it can be used to position the first tube and the second tube c1 separately.

[0101] The first adjusting member 30 also includes a second motion conversion member 340 and a second locking member 350. The second motion conversion member 340 has the same structure as the first motion conversion member 330, and may be proportionally reduced or enlarged. The second locking member 350 is matched with the guide post 310.

[0102] In addition, the third positioning member 21 and the second motion conversion member 340 can also be connected by the first guide member and the second guide member, as can be seen above, and will not be repeated here.

[0103] In an optional embodiment, the second tube c1 is connected to the first through hole of the first positioning member 10. When the first positioning member 10 is connected to the first through hole, there is space in the first through hole. Multiple third positioning members 21 are located in this space. Under the action of the first adjusting member 30, the multiple third positioning members 21 move along the radial direction of the first positioning member 10 and abut against the inner wall of the second tube c1 to shape and position the second tube c1. This ensures that the second tube c1 is assembled onto the pipe connector under the premise that all measurement parameters are qualified, thus ensuring the assembly accuracy and assembly efficiency of the pipe parts.

[0104] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.

Claims

1. A positioning device for assembling pipe components, characterized in that, The pipe fitting includes a first pipe and a pipe connector, the pipe connector having a first through hole, and the positioning device for defining the position of the first pipe on the pipe connector, the positioning device comprising: A first positioning element is used to connect to the first through hole. When the pipe parts are assembled using the positioning device, the axis of the first positioning element is collinear with the axis of the pipe connector. A plurality of second positioning elements are connected to the first positioning element and are circumferentially distributed around the axis of the first positioning element. When the pipe parts are assembled using the positioning device, the plurality of second positioning elements are located in the inner cavity of the first pipe. A first adjusting member is detachably connected to the plurality of second positioning members. Under the action of the first adjusting member, the plurality of second positioning members move radially along the first positioning member and abut against the inner wall of the first pipe to limit the position of the first pipe on one end face of the pipe connector. The outline shape formed by the outer edges of the plurality of second positioning members away from the axis of the first positioning member is used to match the inner wall of the first tube, so that the plurality of second positioning members define the shape of the first tube; the plurality of second positioning members move radially along the first positioning member under the action of the first adjusting member, so that the edges of the plurality of second positioning members can overlap or partially overlap with the orthographic projection of the first tube after the orthographic projection of the plurality of second positioning members in the axial direction of the first positioning member expands outward by a first distance.

2. The positioning device for assembling pipe parts according to claim 1, characterized in that, When the first tube is a circular tube, the second positioning member includes a first support block. The orthographic projection of the edges of the plurality of first support blocks away from the axis of the first positioning member along the axis of the first positioning member overlaps with the same circle. Under the action of the first adjusting member, the plurality of first support blocks move radially along the circular tube and abut against the inner wall of the circular tube.

3. The positioning device for assembling pipe parts according to claim 1, characterized in that, When the first tube is a square tube, the second positioning member includes a second support block. The orthographic projection of the edges of the plurality of second support blocks away from the axis of the first positioning member along the axis of the first positioning member overlaps with the same rectangle. Under the action of the first adjusting member, the plurality of second support blocks move along the diagonal direction of the square tube and abut against the inner wall of the square tube.

4. The positioning device for assembling pipe components according to any one of claims 1 to 3, characterized in that, The first adjusting member includes: A guide post, which is connected to the first positioning member, and the axis of the guide post is collinear with the axis of the first positioning member; A first motion conversion component is fitted onto the guide post and is capable of moving along the axial direction of the guide post; The movement of the first motion conversion component along its axis enables the plurality of second positioning components to move radially along the first positioning component and abut against the inner wall of the first tube.

5. The positioning device for assembling pipe parts according to claim 4, characterized in that, The first adjusting member further includes: A first locking member is fitted onto the guide post and matches the guide post. The first locking member is used to lock or adjust the movement of the first motion conversion member in the axial direction of the guide post.

6. The positioning device for assembling pipe parts according to claim 4, characterized in that, The first motion conversion component has a first inclined surface, and the second positioning component has a second inclined surface that matches the first inclined surface; The axial motion of the first motion conversion component is converted into the radial motion of the second positioning component under the action of the first inclined surface and the second inclined surface.

7. The positioning device for assembling pipe components according to claim 6, characterized in that, Along the axial direction of the guide post, the height of the first inclined surface is less than the height of the second inclined surface.

8. The positioning device for assembling pipe parts according to claim 1, characterized in that, The positioning device further includes: A first guide and a second guide are slidably connected. One of the first guide and the second guide is located on the side of the second positioning member close to the first positioning member, and the other of the first guide and the second guide is located on the side of the first positioning member close to the second positioning member. The second positioning member moves radially along the first positioning member under the guidance of the first guide or the second guide.

9. The positioning device for assembling pipe parts according to claim 8, characterized in that, The second positioning member has a first groove on the side near the first positioning member, and the first groove is formed with the first guide member; The first positioning member has a guide rod on the side near the second positioning member, the guide rod extending radially along the first positioning member, and the guide rod forming the second guide member.

10. The positioning device for assembling pipe components according to claim 1, characterized in that, The pipe fitting further includes a second pipe, which is located at both ends of the pipe connector, and the positioning device is also used to define the position of the second pipe on the pipe connector. The positioning device further includes: A plurality of third positioning elements are connected to the first positioning element and are circumferentially distributed around the axis of the first positioning element. The first adjusting member can also be connected to the plurality of third positioning members. When the pipe parts are assembled using the positioning device, the plurality of third positioning members are located in the inner cavity of the second pipe. Under the action of the first adjusting member, the plurality of third positioning members move radially along the first positioning member and abut against the inner wall of the second pipe to define the position of the second pipe on the other end face of the pipe connector.

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