Wire drawing device and wire drawing method for tensioning line in cryostat cold shield

Abstract

The present application relates to the field of particle accelerator, provide a kind of low-temperature thermostat cold screen inside tensile wire drawing device and wire drawing method. Low-temperature thermostat cold screen inside tensile wire drawing device includes first bridge pipe, second bridge pipe and internal guide body, first bridge pipe and second bridge pipe are inserted into cold screen interior from the opposite sides of thermostat vacuum chamber respectively, and are connected with the corresponding tensile wire instrument sleeve of cold screen interior. First bridge pipe has first variable diameter section in the end close to second bridge pipe. Since the inner diameter of first variable diameter section gradually increases along the direction close to second bridge pipe, the end close to first bridge pipe of second bridge pipe can be easily inserted in the interior of first variable diameter section, to make the interior of first bridge pipe and second bridge pipe communicate to form wire guide channel. In this way, it can be realized without opening the cover, fast and high-precision realization of straight line reference stable and lasting stretching, ensure the accuracy of low-temperature thermostat deformation monitoring, improve the experimental efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of particle accelerators, in particular to a wire drawing device for a strain gauge in a cryostat cold shield and a wire drawing method. BACKGROUND

[0002] At present, the known wire of the strain gauge in the cryostat is arranged in advance when the cover plate is opened, and the wire drawing can only be realized before the cover plate is sealed. However, after the cryostat is wrapped with multiple layers of thermal insulation film, the cold shield is installed, and the cover plate is sealed, the original wire is easily damaged, which is not conducive to the implementation of the strain gauge deformation monitoring, and in order to successfully draw the wire, the cover plate and the cold shield need to be opened again, which takes a long time to install, greatly reduces the experimental efficiency. SUMMARY

[0003] The present application provides a wire drawing device for a strain gauge in a cryostat cold shield to solve the problem of low experimental efficiency in the prior art.

[0004] The present application provides a wire drawing device for a strain gauge in a cryostat cold shield, comprising:

[0005] A first bridge pipe;

[0006] A second bridge pipe, the first bridge pipe and the second bridge pipe are respectively inserted into the cold shield from the opposite sides of the cryostat vacuum chamber and connected with the corresponding strain gauge instrument sleeve in the cold shield; one end of the first bridge pipe close to the second bridge pipe has a first variable diameter section, the inner diameter of the first variable diameter section gradually increases along the direction close to the second bridge pipe, and one end of the second bridge pipe close to the first bridge pipe is inserted into the inside of the first variable diameter section, so that the inside of the first bridge pipe and the second bridge pipe are connected to form a wire guide channel;

[0007] An internal guide body, the internal guide body is arranged in the wire guide channel, the tail end of the internal guide body is connected with the wire, and the internal guide body is used to pull the wire through the wire guide channel.

[0008] According to the wire drawing device for a strain gauge in a cryostat cold shield provided by the present application, one end of the second bridge pipe close to the first bridge pipe has a second variable diameter section, the outer diameter of the second variable diameter section gradually decreases along the direction close to the first bridge pipe, and the second variable diameter section is inserted into the inside of the first variable diameter section.

[0009] According to the wire drawing device for a strain gauge in a cryostat cold shield provided by the present application, the internal guide body comprises:

[0010] A plurality of guide pipes, a plurality of the guide pipes are connected in turn and detachable, and the tail end of the guide pipe located at the tail is connected with the wire.

[0011] The low-temperature thermostat cold screen inner guide wire drawing device provided by the application is characterized in that: one of the leading tube head and tail is provided with an internal thread, the other of the leading tube head and tail is provided with an external thread, and the adjacent two leading tubes are connected through the internal thread and the external thread.

[0012] The low-temperature thermostat cold screen inner guide wire drawing device provided by the application is characterized in that: the length and the outer diameter of each leading tube are equal.

[0013] The low-temperature thermostat cold screen inner guide wire drawing device provided by the application is characterized in that: the low-temperature thermostat cold screen inner guide wire drawing device further comprises:

[0014] The quick-release joint is detachably connected with the tail end of the tail leading tube, and the quick-release joint is connected with the wire.

[0015] The low-temperature thermostat cold screen inner guide wire drawing device provided by the application is characterized in that: the quick-release joint comprises:

[0016] The joint body is arranged in the interior of the tail leading tube, the interior of the joint body is provided with a through hole and a guide wire threading hole in communication with the through hole, the side wall of the tail leading tube is provided with a positioning hole corresponding to the position of the through hole;

[0017] The ball is arranged in the through hole and partially exposed from the through hole and embedded in the positioning hole;

[0018] The spring is arranged in the through hole and abuts against the ball;

[0019] The fastening screw is threadedly matched with the inner wall of the through hole and abuts against the spring.

[0020] The low-temperature thermostat cold screen inner guide wire drawing device provided by the application is characterized in that: the inner diameter of the through hole port is smaller than the diameter of the ball.

[0021] The low-temperature thermostat cold screen inner guide wire drawing device provided by the application is characterized in that: the low-temperature thermostat cold screen inner guide wire drawing device further comprises:

[0022] The digital display tension meter is provided with a hook, and the hook is connected with one end of the wire away from the interior leading body.

[0023] The application further provides a low-temperature thermostat cold screen inner guide wire drawing method, comprising:

[0024] The first bridge pipe and the second bridge pipe are inserted into the cold screen from opposite sides of the thermostat vacuum chamber respectively, and the second bridge pipe is inserted into the inside of the first variable diameter section near one end of the first bridge pipe, and the inside of the first bridge pipe and the second bridge pipe are communicated to form a wire guide channel;

[0025] The first guide pipe is put into the wire guide channel, and then the remaining guide pipes are connected in sequence, and the quick release joint is connected with the wire;

[0026] The wire is pulled through the wire guide channel by the internal guide body, and the tension of the wire is detected in real time by the digital tension meter.

[0027] The wire drawing device for tension wire in the cold screen of the low-temperature thermostat provided by the application has the advantages that the inner diameter of the first variable diameter section gradually increases along the direction close to the second bridge pipe, the end of the second bridge pipe close to the first bridge pipe can be easily inserted into the inside of the first variable diameter section, the inside of the first bridge pipe and the second bridge pipe are communicated to form a wire guide channel, the stable and persistent stretching of the straight line reference can be realized quickly and with high precision without opening the cover plate, the accuracy of the deformation monitoring of the low-temperature thermostat is ensured, and the experimental efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 It is a schematic diagram of the use principle of the wire drawing device for tension wire in the cold screen of the low-temperature thermostat provided by the application.

[0030] Figure 2 It is a schematic diagram of the side view structure of the first bridge pipe and the second bridge pipe provided by the application.

[0031] Figure 3 It is Figure 2 It is a schematic diagram of the local enlarged structure of A in FIG. 4.

[0032] Figure 4 It is a schematic diagram of the side view structure of the guide pipe provided by the application.

[0033] Figure 5 It is a schematic diagram of the side view structure of the quick release joint provided by the application.

[0034] Reference signs:

[0035] 100, thermostat vacuum chamber; 200, cold shield; 300, wire stretcher; 400, first bridge tube; 410, first variable diameter section; 500, second bridge tube; 510, second variable diameter section; 600, internal guide body; 610, guide tube; 700, quick disconnect; 710, connector body; 720, wire stretcher port; 730, ball; 740, spring; 750, set screw; 800, digital readout tension gauge. DETAILED DESCRIPTION

[0036] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application. Obviously, the described embodiments are only a part of embodiments of the present application, but not all embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0037] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0039] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0040] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0041] The use principle of the wire drawing device for the internal extension line of the cryostat cold screen provided by the present application is illustrated below. Figures 1-5 The specific structure of the wire drawing device for the internal extension line of the cryostat cold screen of the present application is described.

[0042] Figure 1 The use principle of the wire drawing device for the internal extension line of the cryostat cold screen provided by the present application is illustrated below. Figure 2 The side view structure schematic diagram of the first bridge pipe and the second bridge pipe provided by the present application is illustrated, Figure 3 is Figure 2 The partial enlarged structure schematic diagram at A in the figure, as Figures 1 to 3 The wire drawing device for the internal extension line of the cryostat cold screen includes a first bridge pipe 400, a second bridge pipe 500 and an internal guide body 600, the first bridge pipe 400 and the second bridge pipe 500 are respectively inserted into the inside of the cold screen 200 from the opposite sides of the cryostat vacuum chamber 100, and are connected with the extension line instrument 300 corresponding to the inside of the cold screen 200; The end of the first bridge pipe 400 close to the second bridge pipe 500 has a first variable diameter section 410, the inner diameter of the first variable diameter section 410 gradually increases along the direction close to the second bridge pipe 500, and the end of the second bridge pipe 500 close to the first bridge pipe 400 is inserted into the inside of the first variable diameter section 410, so that the inside of the first bridge pipe 400 and the second bridge pipe 500 are communicated to form a wire guide channel; The internal guide body 600 is arranged in the wire guide channel, the tail end of the internal guide body 600 is connected with the wire, and the internal guide body 600 is used to pull the wire through the wire guide channel.

[0043] The low-temperature thermostat cold screen provided by the application has the advantages that the inner diameter of the first variable-diameter section 410 gradually increases along the direction close to the second bridge pipe 500, and the end of the second bridge pipe 500 close to the first bridge pipe 400 can be easily inserted into the inside of the first variable-diameter section 410, so that the inside of the first bridge pipe 400 and the inside of the second bridge pipe 500 are communicated to form a wire drawing channel; in this way, the stable and persistent stretching of the straight line reference can be quickly and accurately realized without opening the cover plate, the accuracy of the deformation monitoring of the low-temperature thermostat is ensured, and the experimental efficiency is improved.

[0044] In an embodiment of the application, the cold screen 200 is internally provided with a plurality of wire stretchers 300, and before the first bridge pipe 400 and the second bridge pipe 500 are installed, the laser tracker is used to adjust and align all the wire stretchers 300, so that the straightness of the wire stretchers 300 is within 2-3 mm.

[0045] In an embodiment of the application, as shown in Figure 3 the end of the second bridge pipe 500 close to the first bridge pipe 400 has a second variable-diameter section 510, the outer diameter of the second variable-diameter section 510 gradually decreases along the direction close to the first bridge pipe 400, and the second variable-diameter section 510 is inserted into the inside of the first variable-diameter section 410. Specifically, as shown in Figure 3 the inner diameter of the first variable-diameter section 410 gradually increases along the direction from left to right, and the outer diameter of the second variable-diameter section 510 gradually decreases along the direction from right to left; when the first bridge pipe 400 and the second bridge pipe 500 are docked, the tapered transition design of the first variable-diameter section 410 and the second variable-diameter section 510 enhances the guidance when the first bridge pipe 400 and the second bridge pipe 500 are docked, and the first bridge pipe 400 and the second bridge pipe 500 can be smoothly docked even in the case of slight deviation, thereby improving the fault tolerance of the device; since the cover plate of the low-temperature thermostat does not need to be opened, the cumbersome opening and sealing operations are avoided, the operation complexity is significantly reduced, the experimental preparation time is shortened, and the experimental efficiency is improved; the wire drawing operation is completed without damaging the sealing state of the cold screen 200, which helps to maintain the temperature and pressure inside the low-temperature thermostat stable, avoids the influence of environmental fluctuations on the experimental accuracy, and ensures the reliability of the wire stretcher deformation monitoring data.

[0046] In an embodiment of the present application, the inner wall of the first reducing section 410 is provided with internal threads, and the outer peripheral surface of the second reducing section 510 is provided with external threads. When the second reducing section 510 is inserted into the interior of the first reducing section 410, the first bridge pipe 400 and the second bridge pipe 500 are connected together through the internal threads and the external threads by rotating the first bridge pipe 400 or the second bridge pipe 500, and the threaded connection provides reliable mechanical locking, ensuring that the first bridge pipe 400 and the second bridge pipe 500 can remain stably connected even if subjected to greater tension or vibration during the wire drawing process, effectively preventing loosening or falling off and enhancing the overall stability of the device. In addition, the guiding effect of the threads helps to accurately align the axes of the first bridge pipe 400 and the second bridge pipe 500 during the docking process, thereby ensuring the straightness of the wire guide channel and reducing the bending or twisting of the wire during the drawing process, improving the quality of the wire drawing.

[0047] In an embodiment of the present application, Figure 4 A side view cross-sectional structure diagram of the guide pipe provided by the present application is illustrated as follows: Figure 1 and Figure 4 As shown in the drawings, the internal guide body 600 includes a plurality of guide pipes 610, which are connected in sequence in a detachable manner. The plurality of guide pipes 610 are connected in a detachable manner, allowing the internal guide body 600 to be flexibly adjusted in length according to actual needs to adapt to different specifications of cryostats and different wire drawing distance requirements, enhancing the versatility of the device. The total length of the plurality of guide pipes 610 is greater than the sum of the lengths of the first bridge pipe 400 and the second bridge pipe 500, to ensure that the internal guide body 600 can pass in from one end of the wire guide channel and pass out from the other end of the wire guide channel. The tail end of the guide pipe 610 located at the tail is connected to the wire. In use, the internal guide body 600 is passed in from one end of the wire guide channel and passed out from the other end of the wire guide channel, and the internal guide body 600 pulls the wire out from the other end of the wire guide channel. Since each guide pipe 610 is relatively short, it is easier to operate and adjust the direction of the shorter guide pipe 610 in a narrow offline horizontal test or in the interior space of an online tunnel, facilitating smooth passage through the wire guide channel in complex environments and improving the adaptability and reliability of the device, effectively solving the problem of wire drawing in the narrow and closed space of a cryostat.

[0048] In an embodiment of the present application, as Figure 4As shown, one of the head end and tail end of the guide tube 610 is provided with an internal thread, and the other of the head end and tail end of the guide tube 610 is provided with an external thread, and the adjacent two guide tubes 610 are connected through the internal thread and the external thread, and the plurality of guide tubes 610 are connected in sequence to form the internal guide body 600 with a relatively long length. The design of the threaded connection makes the assembly and disassembly of the guide tube 610 simple and fast, reduces the installation and debugging time, and improves the overall work efficiency. Of course, the connection mode between the adjacent two guide tubes 610 is not limited thereto, and a buckle or other connection mode can also be used.

[0049] In an embodiment of the present application, the length and the outer diameter of each guide tube 610 are equal, and the uniform size facilitates batch production of the guide tube 610, improves production efficiency, reduces production cost, and facilitates quality control and management. With this arrangement, the adjacent two guide tubes 610 can be interchangeable, and the installer does not need to classify and match guide tubes 610 of different lengths or outer diameters, reducing the preparation work before installation and reducing the operation difficulty and error rate.

[0050] In an embodiment of the present application, as shown in Figure 4 The wire drawing device for the tension wire in the cryostat cold shield further includes a quick-release joint 700, the quick-release joint 700 is detachably connected with the tail end of the guide tube 610 located at the tail portion, and the quick-release joint 700 is connected with the wire. In use, the wire is first connected with the quick-release joint 700, and then the quick-release joint 700 is connected with the tail end of the guide tube 610 located at the tail portion, so as to realize the connection between the wire and the internal guide body 600. By detachably connecting the quick-release joint 700 with the tail end of the guide tube 610 located at the tail portion, the quick connection between the wire and the internal guide body 600 is realized, which greatly improves the efficiency of the wire drawing operation. In the past, when performing the wire connection operation, a lot of time and effort were often consumed to ensure the accuracy and stability of the connection. After adopting the design of the quick-release joint 700, the operator can complete the connection between the wire and the internal guide body 600 in a very short time, which reduces the cumbersome operation process and makes the entire wire drawing process more smooth and fast.

[0051] In an embodiment of the present application, Figure 5 A side view cross-sectional structure schematic diagram of the quick-release joint provided by the present application is shown in Figure 5As shown, the quick-release joint 700 includes a joint body 710, a ball 730, a spring 740 and a fastening screw 750, the joint body 710 is arranged inside the guide tube 610 at the tail, the inside of the joint body 710 is provided with a through hole and a wire threading port 720 in communication with the through hole, wherein the through hole is arranged along the radial direction of the joint body 710, the wire threading port 720 is arranged along the axial direction of the joint body 710 and extends to the end face of the joint body 710, and the wire is threaded inside the wire threading port 720.

[0052] The side wall of the guide tube 610 at the tail is provided with two positioning holes, and the positions of the two positioning holes are on the same straight line. The ball 730 is a circular ball, the ball 730 is arranged in the through hole and partially exposed to the through hole and embedded in the positioning hole, for fixing the joint body 710, thereby realizing detachable connection of the quick-release joint 700 with the tail end of the guide tube 610 at the tail. The spring 740 is arranged in the through hole, the spring 740 is located between the ball 730 and the fastening screw 750, and the spring 740 abuts against the ball 730. The fastening screw 750 is threadedly connected with the inner wall of the through hole, and the fastening screw 750 abuts against the spring 740. After using the quick-release joint 700, the operator only needs to pass the wire through the wire threading port 720, then tighten the fastening screw 750, the spring 740 is compressed under the pushing of the fastening screw 750, the wire is clamped between the spring 740, realizing quick connection of the wire with the guide tube 610, without the aid of other auxiliary tools, the operation is simple and fast, greatly saving time and improving experimental efficiency.

[0053] In an embodiment of the present application, the inner diameter of the through hole port is smaller than the diameter of the ball 730, and the ball 730 can only partially expose the through hole and be embedded in the positioning hole under the pushing force of the spring 740, and will not be completely pushed out of the through hole. This design ensures the close fit between the ball 730 and the positioning hole, enhances the connection strength of the quick-release joint 700 and the guide tube 610, avoids problems caused by accidental falling of the ball 730 during wire drawing, thereby ensuring the continuity and stability of the wire drawing process, and improving the success rate and safety of the wire drawing operation of the cryostat.

[0054] In an embodiment of the present application, the wire drawing device for the wire drawing inside the cold screen of the cryostat further comprises a digital tension meter 800, the connecting section of the digital tension meter 800 is provided with a hook, the hook is connected with the end of the wire away from the internal guide body 600, and the digital tension meter 800 is used for detecting and displaying the tension of the wire during wire drawing, when the tension approaches the preset tension value, the digital tension meter 800 outputs a prompt information, at this time, the internal guide body 600 is stopped from being pulled, to prevent the wire from being broken.

[0055] It should be noted that the prompt message can be either text or sound. The preset tension value is less than the maximum tension value of the thread. Maximum tensile force The calculation can be performed using the following formula (1).

[0056] (1);

[0057] in, s The cross-sectional area of ​​the thread, in mm. 2 , g It is the acceleration due to gravity. g The value is 9.8n / kg. The allowable stress is expressed in MPa. r The radius of the thread is 1. n For safety reasons, n The value can be 1-2. It represents the yield strength.

[0058] The present invention also provides a method for drawing the inner tension wire of a cryogenic thermostat, the method comprising:

[0059] In step S100, the first bridge connector 400 and the second bridge connector 500 are inserted into the cold screen 200 from opposite sides of the thermostat vacuum chamber 100, and the end of the second bridge connector 500 closer to the first bridge connector 400 is inserted into the first diameter section 410. The interiors of the first bridge connector 400 and the second bridge connector 500 are connected to form a wire guide channel.

[0060] Specifically, such as Figure 1 As shown, firstly, insert the first bridge connector 400 into the cold screen 200 from the left side of the thermostat vacuum chamber 100. During the insertion of the first bridge connector 400, ensure a smooth and unobstructed movement, maintaining its linear trajectory to prevent loosening or misalignment of the electrodes on the left side of the wire guide 300. Next, insert the second bridge connector 500 into the cold screen 200 from the right side of the thermostat vacuum chamber 100. Again, ensure a smooth and unobstructed movement, maintaining its linear trajectory to prevent loosening or misalignment of the electrodes on the right side of the wire guide 300. After the second bridge connector 500 enters the cold screen 200, the second reducing section 510 is inserted into the first reducing section 410, connecting the interiors of the first bridge connector 400 and the second bridge connector 500 to form a wire guiding channel.

[0061] In step S200, the first guide tube 610 is placed into the wire guide channel, and the remaining guide tubes 610 are connected in sequence. The quick-release connector 700 is then connected to the wire.

[0062] Specifically, as shown in Figure 1 First, the first guide tube 610 is put into the wire guide channel, then the first end of the second guide tube 610 is connected with the tail end of the first guide tube 610 through the cooperation of the internal thread and the external thread, and then the remaining guide tubes 610 are connected in sequence to form the internal guide body 600 with a longer length. In the process of connecting the guide tubes 610, the connected guide tubes 610 are pushed into the wire guide channel while the guide tubes 610 are being connected, and after the guide tubes 610 at the tail are connected, the quick release joint 700 is connected with the wire.

[0063] In step S300, the wire is pulled through the wire guide channel by the internal guide body 600, and the pulling force borne by the wire is detected in real time by the digital pulling force gauge 800.

[0064] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions described in the foregoing examples can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A wire drawing device for the inner tension wire of a low-temperature thermostat, characterized in that, include: First Bridge Takeover (400); The second bridge connector (500) is inserted into the cold shield (200) from opposite sides of the thermostat vacuum chamber (100) and connected to the corresponding tensioner (300) inside the cold shield (200). The first bridge connector (400) has a first variable diameter section (410) at the end near the second bridge connector (500). The inner diameter of the first variable diameter section (410) gradually increases along the direction near the second bridge connector (500). The end of the second bridge connector (500) near the first bridge connector (400) is inserted into the interior of the first variable diameter section (410) so that the interiors of the first bridge connector (400) and the second bridge connector (500) are connected to form a wire guiding channel. An internal guide (600) is inserted into the thread guiding channel, and the tail end of the internal guide (600) is connected to the thread. The internal guide (600) is used to pull the thread through the thread guiding channel. The second bridge connector (500) has a second variable diameter section (510) at one end near the first bridge connector (400). The outer diameter of the second variable diameter section (510) gradually decreases in the direction near the first bridge connector (400). The second variable diameter section (510) is inserted into the interior of the first variable diameter section (410). The internal guide body (600) includes: Multiple guide tubes (610) are connected in sequence in a detachable manner, and the tail end of the guide tube (610) located at the tail end is connected to the wire.

2. The wire drawing device for the inner tension wire of the low-temperature thermostat cold shield according to claim 1, characterized in that, One of the beginning and end of the guide tube (610) is provided with an internal thread, and the other of the beginning and end of the guide tube (610) is provided with an external thread. Two adjacent guide tubes (610) are connected by the internal thread and the external thread.

3. The wire drawing device for the inner tension wire of the low-temperature thermostat cold screen according to claim 1, characterized in that, Each of the guide tubes (610) has the same length and outer diameter.

4. The wire drawing device for the inner tension wire of the low-temperature thermostat cold screen according to claim 1, characterized in that, Also includes: A quick-release connector (700) is detachably connected to the tail end of the guide tube (610) located at the tail end, and the quick-release connector (700) is connected to the wire.

5. The wire drawing device for the inner tension wire of the low-temperature thermostat cold screen according to claim 4, characterized in that, The quick-release coupling (700) includes: The connector body (710) is disposed inside the guide tube (610) at the tail end. The connector body (710) is provided with a through hole and a tension wire threading port (720) communicating with the through hole. The side wall of the guide tube (610) at the tail end is provided with a positioning hole, which corresponds to the position of the through hole. A sphere (730) is disposed in the through hole and partially exposed before being embedded in the positioning hole; A spring (740) is disposed in the through hole and abuts against the ball (730); A fastening screw (750) is threaded into the inner wall of the through hole, and the fastening screw (750) abuts against the spring (740).

6. The wire drawing device for the inner tension wire of the low-temperature thermostat cold screen according to claim 5, characterized in that, The inner diameter of the through-hole port is smaller than the diameter of the sphere (730).

7. The wire drawing device for the inner tension wire of the cold screen of a low-temperature thermostat according to any one of claims 1 to 6, characterized in that, Also includes: A digital display force gauge (800) is provided with a hook on its connecting section, and the hook is connected to the end of the wire away from the internal guide (600).

8. A method for drawing the inner tension wire of a cryogenic thermostat's cold shield, said drawing method being based on the drawing device for the inner tension wire of a cryogenic thermostat's cold shield according to any one of claims 1 to 7, characterized in that, include: The first bridge connector (400) and the second bridge connector (500) are inserted into the cold shield (200) from opposite sides of the thermostat vacuum chamber (100), and the end of the second bridge connector (500) closer to the first bridge connector (400) is inserted into the first variable diameter section (410). The interiors of the first bridge connector (400) and the second bridge connector (500) are connected to form a wire guide channel. Insert the first guide tube (610) into the wire guide channel, then connect the remaining guide tubes (610) in sequence, and connect the quick-release connector (700) to the wire; The thread is pulled through the thread guide channel by the internal guide (600), and the tension on the thread is detected in real time by the digital tensile tester (800); The first bridge connector (400) has a first variable diameter section (410) at one end near the second bridge connector (500), the inner diameter of the first variable diameter section (410) gradually increases in the direction near the second bridge connector (500); the second bridge connector (500) has a second variable diameter section (510) at one end near the first bridge connector (400), the outer diameter of the second variable diameter section (510) gradually decreases in the direction near the first bridge connector (400), and the second variable diameter section (510) is inserted inside the first variable diameter section (410); the internal guide body (600) includes multiple guide tubes (610), the multiple guide tubes (610) are detachably connected in sequence, and the tail end of the guide tube (610) located at the tail end is connected to the wire.

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