Wire drawing device and wire drawing method for tension wire in cold shield of cryostat

Abstract

The invention relates to the field of particle accelerators, and provides a wire drawing device and a wire drawing method for a tension wire in a cold shield of a cryostat. The wire drawing device for the tension wire in the cold screen of the cryostat comprises a first bridging pipe, a second bridging pipe and an internal guide body, and the first bridging pipe and the second bridging pipe are inserted into the cold screen from the two opposite sides of a vacuum chamber of the cryostat respectively and connected with a tension wire instrument corresponding to the interior of the cold screen in a sleeved mode; the end, close to the second bridging pipe, of the first bridging pipe is provided with a first reducing section. Due to the fact that the inner diameter of the first reducing section is gradually increased in the direction close to the second bridging pipe, the end, close to the first bridging pipe, of the second bridging pipe can be easily inserted into the first reducing section, and the interior of the first bridging pipe and the interior of the second bridging pipe are communicated to form a wire guiding channel. Therefore, under the condition that the cover plate does not need to be opened, stable and lasting stretching of the linear reference can be rapidly achieved with high precision, the accuracy of deformation monitoring of the cryostat is ensured, and the experiment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of particle accelerators, and in particular to a wire drawing device and a wire drawing method for a tension wire inside a cold shield of a cryostat. Background Art

[0002] At present, the known low temperature thermostat wires are pre-arranged when the cover is opened, and wire drawing can only be achieved before the cover is sealed. However, after the cryostat is wrapped with multiple layers of insulation film, the cold screen is installed, and the cover is sealed, the original wires are easily damaged, which is not conducive to the implementation of wire deformation monitoring. In addition, in order to successfully draw the wire, the cover and cold screen need to be opened again, which takes a long time to install and greatly reduces the experimental efficiency. Summary of the invention

[0003] The invention provides a wire drawing device for a tension wire inside a cold shield of a low temperature thermostat, which is used to solve the problem of low experimental effect in the prior art.

[0004] The present invention provides a wire drawing device for a tensioning wire in a cold shield of a cryostat, comprising: The first bridge took over; A second bridge tube, wherein the first bridge tube and the second bridge tube are respectively inserted into the interior of the cold screen from opposite sides of the vacuum chamber of the thermostat, and are sleeve-connected with the corresponding wire tensioning instrument inside the cold screen; the first bridge tube has a first diameter-reducing section at one end close to the second bridge tube, and the inner diameter of the first diameter-reducing section gradually increases in a direction close to the second bridge tube; the second bridge tube has an end close to the first bridge tube inserted into the interior of the first diameter-reducing section, so that the interiors of the first bridge tube and the second bridge tube are connected to form a wire guiding channel; An internal guide body is provided in the wire guide channel, a tail end of the internal guide body is connected to the wire, and the internal guide body is used to pull the wire through the wire guide channel.

[0005] According to a wire drawing device for a tension wire inside a low-temperature thermostat cold shield provided by the present invention, the second bridge tube has a second diameter reducing section at one end close to the first bridge tube, the outer diameter of the second diameter reducing section gradually decreases in a direction close to the first bridge tube, and the second diameter reducing section is inserted inside the first diameter reducing section.

[0006] According to a wire drawing device for a tensioning wire inside a cryostat cold shield provided by the present invention, the internal guide body comprises: A plurality of guide tubes are detachably connected in sequence, and the tail ends of the guide tubes at the tail are connected to the wires.

[0007] A wire drawing device for the tension wire inside the cold shield of a cryostat according to the present invention, wherein one of the head end and the tail end of the guiding tube is provided with an internal thread, and the other of the head end and the tail end of the guiding tube is provided with an external thread, and two adjacent guiding tubes are connected by the internal thread and the external thread.

[0008] A wire drawing device for the tension wire inside the cold shield of a cryostat according to the present invention, wherein the length and outer diameter of each guiding tube are equal.

[0009] A wire drawing device for the tension wire inside the cold shield of a cryostat according to the present invention, further comprising: A quick-release joint, which is detachably connected to the tail end of the guiding tube located at the tail, and the quick-release joint is connected to the silk thread.

[0010] A wire drawing device for the tension wire inside the cold shield of a cryostat according to the present invention, wherein the quick-release joint comprises: A joint body, which is arranged inside the guiding tube at the tail, and a through hole and a tension wire threading port communicating with the through hole are arranged inside the joint body; a positioning hole is arranged on the side wall of the guiding tube at the tail, and the positioning hole corresponds to the position of the through hole; A sphere, which is arranged inside the through hole, and part of the sphere protrudes from the through hole and is then embedded in the positioning hole; A spring, which is arranged inside the through hole, and the spring abuts against the sphere; A fastening screw, which is in threaded fit with the inner wall of the through hole, and the fastening screw abuts against the spring.

[0011] A wire drawing device for the tension wire inside the cold shield of a cryostat according to the present invention, wherein the inner diameter of the port of the through hole is smaller than the diameter of the sphere.

[0012] A wire drawing device for the tension wire inside the cold shield of a cryostat according to the present invention, further comprising: A digital display tensiometer, a hook is arranged on the connecting section of the digital display tensiometer, and the hook is connected to the end of the silk thread far away from the internal guiding body.

[0013] The present invention also provides a wire drawing method for the tension wire inside the cold shield of a cryostat, comprising: Insert the first bridge connecting pipe and the second bridge connecting pipe into the cold shield from opposite sides of the vacuum chamber of the cryostat respectively, and make the end of the second bridge connecting pipe close to the first bridge connecting pipe be inserted into the inside of the first reduced diameter section, and the inside of the first bridge connecting pipe and the second bridge connecting pipe is communicated to form a silk thread guiding channel; Place the first guiding tube into the silk guiding channel, then connect the remaining guiding tubes in sequence, and connect the quick-release joint to the silk. Pull the silk through the silk guiding channel by the internal guiding body, and detect the tension of the silk in real time through a digital display tensiometer.

[0014] The wire drawing device for the tension wire inside the cold screen of the cryostat provided by the present invention has an inner diameter of the first reduced diameter section gradually increasing along the direction close to the second bridge connecting pipe. One end of the second bridge connecting pipe close to the first bridge connecting pipe can be easily inserted into the inside of the first reduced diameter section, so that the inside of the first bridge connecting pipe and the second bridge connecting pipe is communicated to form a silk guiding channel. In this way, it is possible to quickly and accurately achieve stable and lasting stretching of the straight reference without opening the cover plate, ensuring the accuracy of the deformation monitoring of the cryostat and improving the experimental efficiency. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is a schematic diagram of the working principle of the wire drawing device for the tension wire inside the cold screen of the cryostat provided by the present invention.

[0017] Figure 2 is a schematic side view structure diagram of the first bridge connecting pipe and the second bridge connecting pipe provided by the present invention.

[0018] Figure 3 is Figure 2 a partial enlarged structure diagram at A in

[0019] Figure 4 is a schematic side view sectional structure diagram of the guiding tube provided by the present invention.

[0020] Figure 5 is a schematic side view sectional structure diagram of the quick-release joint provided by the present invention.

[0021] Reference Signs: 100, cryostat vacuum chamber; 200, cold screen; 300, tension wire instrument; 400, first bridge connecting pipe; 410, first reduced diameter section; 500, second bridge connecting pipe; 510, second reduced diameter section; 600, internal guiding body; 610, guiding tube; 700, quick-release joint; 710, joint body; 720, tension wire threading port; 730, sphere; 740, spring; 750, fastening screw; 800, digital display tensiometer. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without any creative efforts shall fall within the protection scope of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0025] In the embodiments of the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0027] Combine the following Figures 1 - 5 The specific structure of the wire drawing device for the inner tensioning wire of the cryostat cold shield of the present invention is described.

[0028] Figure 1 The schematic diagram of the use principle of the wire drawing device for the inner tensioning wire of the cryostat cold shield provided by the present invention is illustrated. Figure 2 The side view structural diagram of the first bridge tube and the second bridge tube provided by the present invention is illustrated. Figure 3 yes Figure 2 The local enlarged structural diagram at A in the middle is as follows: Figures 1 to 3 As shown, the wire drawing device for the tensioning wire in the cold shield of the cryostat includes a first bridge tube 400, a second bridge tube 500 and an internal guide body 600. The first bridge tube 400 and the second bridge tube 500 are respectively inserted into the cold shield 200 from opposite sides of the vacuum chamber 100 of the cryostat, and are sleeved and connected with the corresponding tensioning wire instrument 300 in the cold shield 200; the first bridge tube 400 has a first diameter reducing section 410 at one end close to the second bridge tube 500, and the inner diameter of the first diameter reducing section 410 gradually increases in the direction close to the second bridge tube 500, and the second bridge tube 500 has an end close to the first bridge tube 400 inserted into the first diameter reducing section 410, so that the first bridge tube 400 and the second bridge tube 500 are connected to form a wire guiding channel; the internal guide body 600 is penetrated into the wire guiding channel, and the tail end of the internal guide body 600 is connected to the wire, and the internal guide body 600 is used to pull the wire through the wire guiding channel.

[0029] The wire drawing device for the tension wire inside the cold shield of the cryostat provided by the present invention has the first reduced diameter section 410 with an inner diameter gradually increasing in the direction close to the second bridge connecting pipe 500. One end of the second bridge connecting pipe 500 close to the first bridge connecting pipe 400 can be easily inserted into the inside of the first reduced diameter section 410, so that the interiors of the first bridge connecting pipe 400 and the second bridge connecting pipe 500 are connected to form a wire guiding channel. In this way, without opening the cover plate, the stable and lasting stretching of the linear reference can be achieved quickly and with high precision, ensuring the accuracy of the deformation monitoring of the cryostat and improving the experimental efficiency.

[0030] In an embodiment of the present invention, a plurality of tension wire gauges 300 are arranged inside the cold shield 200. Before installing the first bridge connecting pipe 400 and the second bridge connecting pipe 500, all the tension wire gauges 300 are adjusted and aligned first by using a laser tracker, so that the straightness of the tension wire gauges 300 is within 2 - 3 mm.

[0031] In an embodiment of the present invention, as Figure 3 shown, one end of the second bridge connecting pipe 500 close to the first bridge connecting pipe 400 has a second reduced diameter section 510, and the outer diameter of the second reduced diameter section 510 gradually decreases in the direction close to the first bridge connecting pipe 400. The second reduced diameter section 510 is inserted into the inside of the first reduced diameter section 410. Specifically, as Figure 3 shown, the inner diameter of the first reduced diameter section 410 gradually increases from left to right, and the outer diameter of the second reduced diameter section 510 gradually decreases from right to left. When the first bridge connecting pipe 400 and the second bridge connecting pipe 500 are docked, due to the tapered transition design of the first reduced diameter section 410 and the second reduced diameter section 510, the guiding property during the docking of the first bridge connecting pipe 400 and the second bridge connecting pipe 500 is enhanced, and they can be smoothly docked even in the case of slight deviation, improving the fault tolerance rate of the device; since there is no need to open the cover plate of the cryostat, the cumbersome opening and sealing operations are avoided, significantly reducing the operation complexity, shortening the experimental preparation time, and improving the experimental efficiency; the wire drawing operation is completed without damaging the sealed state of the cold shield 200, which helps to maintain the temperature and pressure stability inside the cryostat, avoid the influence of environmental fluctuations on the experimental accuracy, and ensure the reliability of the tension wire deformation monitoring data.

[0032] In one embodiment of the present invention, the inner wall of the first diameter-changing section 410 is provided with internal threads, and the outer peripheral surface of the second diameter-changing section 510 is provided with external threads. When the second diameter-changing section 510 is inserted into the inside of the first diameter-changing section 410, by rotating the first bridge pipe 400 or the second bridge pipe 500, the first bridge pipe 400 and the second bridge pipe 500 are connected together through the internal threads and the external threads. The threaded connection provides reliable mechanical locking, ensuring that even under a large tensile force or vibration during the wire drawing process, the first bridge pipe 400 and the second bridge pipe 500 can maintain a stable connection, effectively preventing loosening or falling off, and enhancing the overall stability of the device. In addition, the guiding function 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 guiding channel, reducing the bending or twisting of the wire during the stretching process, and improving the wire drawing quality.

[0033] In one embodiment of the present invention, Figure 4 The side view sectional structure schematic diagram of the guiding pipe provided by the present invention is illustrated, as Figure 1 and Figure 4 shown, the internal guiding body 600 includes a plurality of guiding pipes 610, and the plurality of guiding pipes 610 are detachably connected in sequence. The detachable connection mode of the plurality of guiding pipes 610 enables the internal guiding body 600 to be flexibly adjusted in length according to actual needs, so as to adapt to cryostats of different specifications and different wire drawing distance requirements, enhancing the versatility of the device. The total length of the plurality of guiding 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 guiding body 600 can penetrate from one end of the wire guiding channel and then penetrate out from the other end of the wire guiding channel. The tail end of the guiding pipe 610 located at the tail is connected to the wire. During use, the internal guiding body 600 is inserted into the wire guiding channel from one end and penetrates out from the other end of the wire guiding channel, and the internal guiding body 600 pulls the wire to penetrate out from the other end of the wire guiding channel. Since the length of each guiding pipe 610 is short, in a narrow off-line horizontal test or the internal space of an on-line tunnel, the shorter guiding pipes 610 are easier to operate and adjust the direction, facilitating smoothly passing through the wire guiding channel in a complex environment, improving the adaptability and reliability of the device, and effectively solving the problem of wire drawing in the narrow and enclosed space of the cryostat.

[0034] In one embodiment of the present invention, as Figure 4As shown, one of the head end and the tail end of the guiding tube 610 is provided with an internal thread, and the other of the head end and the tail end of the guiding tube 610 is provided with an external thread. Adjacent guiding tubes 610 are connected through the internal thread and the external thread. By sequentially connecting multiple guiding tubes 610, a relatively long internal guiding body 600 is formed. The design of using thread connection makes the assembly and disassembly process of the guiding tube 610 simple and fast, reduces the installation and debugging time, and improves the overall working efficiency. Of course, the connection method between adjacent guiding tubes 610 is not limited to this, and snap fasteners or other connection methods can also be used.

[0035] In an embodiment of the present invention, the length and outer diameter of each guiding tube 610 are equal. The unified dimensions facilitate the mass production of the guiding tube 610, improve production efficiency, reduce production costs, and are also conducive to quality control and management. With this setting method, adjacent guiding tubes 610 can be interchanged. Installers do not need to classify and match guiding tubes 610 with different lengths or outer diameters, reducing the preparatory work before installation and lowering the operation difficulty and error rate.

[0036] In an embodiment of the present invention, as Figure 4 shown, the wire drawing device for the internal tensile wire of the cryostat cold screen further includes a quick-release joint 700. The quick-release joint 700 is detachably connected to the tail end of the guiding tube 610 located at the tail, and the quick-release joint 700 is connected to the wire. During use, first connect the wire to the quick-release joint 700, and then connect the quick-release joint 700 to the tail end of the guiding tube 610 located at the tail, thereby realizing the connection between the wire and the internal guiding body 600. By making the quick-release joint 700 detachably connected to the tail end of the guiding tube 610 located at the tail, the quick connection between the wire and the internal guiding body 600 is realized, greatly improving the efficiency of the wire drawing operation; in the past, when performing wire connection operations, it often took a lot of time and effort to ensure the accuracy and stability of the connection. After adopting the design of this quick-release joint 700, the operator can complete the connection work between the wire and the internal guiding body 600 in a very short time, reducing the cumbersome operation process and making the entire wire drawing process smoother and faster.

[0037] In an embodiment of the present invention, Figure 5 illustrates a schematic side sectional structure view of the quick-release joint provided by the present invention, as Figure 5As shown, the quick-release connector 700 includes a connector body 710, a ball 730, a spring 740 and a fastening screw 750. The connector body 710 is arranged inside the guide tube 610 at the tail. The connector body 710 is provided with a through hole and a tensioning wire threading port 720 connected to the through hole. The through hole is arranged along the radial direction of the connector body 710, the tensioning wire threading port 720 is arranged along the axial direction of the connector body 710 and extends to the end face of the connector body 710, and the wire is passed through the tensioning wire threading port 720.

[0038] 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 round ball, which is arranged in the through hole, and is embedded in the positioning hole after being partially exposed from the through hole, and is used to fix the joint body 710, thereby realizing the detachable connection between the quick-release joint 700 and the tail end of the guide tube 610 at the tail. The spring 740 is arranged in the through hole, and 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 matched with the inner wall of the through hole, and the fastening screw 750 abuts against the spring 740. After adopting this quick-release connector 700, the operator only needs to pass the silk thread through the tensioning wire threading port 720, and then tighten the fastening screw 750. The spring 740 is compressed under the push of the fastening screw 750, and the silk thread is clamped between the springs 740, thereby realizing a quick connection between the silk thread and the guide tube 610. No other auxiliary tools are required, and the operation is simple and quick, which greatly saves time and improves experimental efficiency.

[0039] In one embodiment of the present invention, the inner diameter of the through hole port is smaller than the diameter of the sphere 730, and the sphere 730 can only partially be exposed from the through hole and embedded in the positioning hole under the thrust of the spring 740, but will not be completely pushed out of the through hole. This design ensures a tight fit between the sphere 730 and the positioning hole, enhances the connection strength between the quick-release connector 700 and the guide tube 610, and avoids problems caused by accidental detachment of the sphere 730 during the wire drawing process, thereby ensuring the continuity and stability of the wire drawing process, and improving the success rate and safety of the low-temperature thermostat wire drawing operation.

[0040] In one embodiment of the present invention, the wire drawing device for the tension wire inside the cold screen of the cryostat also includes a digital force gauge 800. The connecting section of the digital force gauge 800 is provided with a hook, and the hook is connected to the end of the wire away from the internal guide body 600. The digital force gauge 800 is used to detect and display the tension applied to the wire during the wire drawing process. When the tension approaches the preset tension value, the digital force gauge 800 outputs a prompt message. At this time, the internal guide body 600 is stopped from being pulled to prevent the wire from being broken.

[0041] It should be noted here that the prompt information can be text information or voice information. The preset tensile value is less than the maximum tensile value of the wire , the maximum tensile value can be calculated by the following formula (1).

[0042] (1); wherein, s is the cross-sectional area of the wire, with the unit of mm 2 , g is the acceleration due to gravity, g takes the value of 9.8 n / kg, is the allowable stress, with the unit of MPa, r is the radius of the wire, n is the safety factor, n takes the value of 1 - 2, is the yield strength.

[0043] The present invention also provides a wire drawing method for the tensile wire inside the cold screen of a cryostat. The wire drawing method for the tensile wire inside the cold screen of a cryostat includes: Step S100, insert the first bridge connecting pipe 400 and the second bridge connecting pipe 500 into the inside of the cold screen 200 from opposite sides of the cryostat vacuum chamber 100 respectively, and make the end of the second bridge connecting pipe 500 close to the first bridge connecting pipe 400 be inserted into the inside of the first reduced diameter section 410. The inside of the first bridge connecting pipe 400 and the second bridge connecting pipe 500 is communicated to form a wire guiding channel.

[0044] Specifically, as Figure 1 shown, first insert the first bridge connecting pipe 400 into the inside of the cold screen 200 from the left side of the cryostat vacuum chamber 100. During the process of pushing the first bridge connecting pipe 400, it is required to push it gently without jamming, and keep the first bridge connecting pipe 400 moving along a straight path to avoid loosening or misalignment of the electrodes of the left tensile wire instrument 300; then insert the second bridge connecting pipe 500 into the inside of the cold screen 200 from the right side of the cryostat vacuum chamber 100. During the process of pushing the second bridge connecting pipe 500, it is required to push it gently without jamming, and keep the second bridge connecting pipe 500 moving along a straight path to avoid loosening or misalignment of the electrodes of the right tensile wire instrument 300. After the second bridge connecting pipe 500 enters the inside of the cold screen 200, the second reduced diameter section 510 is inserted into the inside of the first reduced diameter section 410, and the inside of the first bridge connecting pipe 400 and the second bridge connecting pipe 500 is communicated to form a wire guiding channel.

[0045] Step S200, put the first guiding pipe 610 into the wire guiding channel, then connect the remaining guiding pipes 610 in sequence, and connect the quick release joint 700 with the wire.

[0046] Specifically, as Figure 1As shown in the figure, first place the first guiding tube 610 into the silk guiding channel, then connect the head end of the second guiding tube 610 to the tail end of the first guiding tube 610 through the cooperation of internal thread and external thread, and then connect the remaining guiding tubes 610 in sequence to form a relatively long internal guiding body 600. During the connection of the guiding tubes 610, while connecting the guiding tubes 610, push the connected guiding tubes 610 into the silk guiding channel. After connecting the guiding tubes 610 at the tail, connect the quick-release joint 700 to the silk.

[0047] Step S300: Pull the silk through the silk guiding channel by the internal guiding body 600, and use the digital display tensiometer 800 to detect the tension on the silk in real time.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; 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 invention.

Claims

1. A wire drawing device for the tension wire inside the cold shield of a cryostat, characterized in that, Comprising: The first bridge connection pipe (400); The second bridge connection pipe (500), the first bridge connection pipe (400) and the second bridge connection pipe (500) are respectively inserted into the inside of the cold screen (200) from opposite sides of the thermostat vacuum chamber (100), and are socket-connected with the corresponding extensometer (300) inside the cold screen (200); one end of the first bridge connection pipe (400) close to the second bridge connection pipe (500) has a first reduced-diameter section (410), the inner diameter of the first reduced-diameter section (410) gradually increases along the direction close to the second bridge connection pipe (500), and one end of the second bridge connection pipe (500) close to the first bridge connection pipe (400) is inserted into the inside of the first reduced-diameter section (410), so that the inside of the first bridge connection pipe (400) and the second bridge connection pipe (500) is communicated to form a silk guiding channel; The internal guide body (600), the internal guide body (600) is arranged in the silk guiding channel, the tail end of the internal guide body (600) is connected with the silk, and the internal guide body (600) is used for pulling the silk through the silk guiding channel.

2. The wire drawing device for the tension wire inside the cold shield of the cryostat according to claim 1, characterized in that, One end of the second bridge connection pipe (500) close to the first bridge connection pipe (400) has a second reduced-diameter section (510), the outer diameter of the second reduced-diameter section (510) gradually decreases along the direction close to the first bridge connection pipe (400), and the second reduced-diameter section (510) is inserted into the inside of the first reduced-diameter section (410).

3. The wire drawing device for the tension wire inside the cold screen of the cryostat according to claim 1, characterized in that, The internal guide body (600) includes: Multiple guide pipes (610), the multiple guide pipes (610) are detachably connected in sequence, and the tail end of the guide pipe (610) located at the tail is connected with the silk.

4. The wire drawing device for the tension wire inside the cold shield of the cryostat according to claim 3, characterized in that, One of the head end and the tail end of the guide pipe (610) is provided with an internal thread, and the other of the head end and the tail end of the guide pipe (610) is provided with an external thread, and two adjacent guide pipes (610) are connected through the internal thread and the external thread.

5. The wire drawing device for the tension wire inside the cold screen of the cryostat according to claim 3, characterized in that, The length and the outer diameter of each guide pipe (610) are equal.

6. The wire drawing device for the tension wire inside the cold screen of the cryostat according to claim 3, characterized in that, Further comprising: The quick-release joint (700), the quick-release joint (700) is detachably connected with the tail end of the guide pipe (610) located at the tail, and the quick-release joint (700) is connected with the silk.

7. The wire drawing device for the tension wire inside the cold screen of the cryostat according to claim 6, characterized in that, The quick-release joint (700) includes: The joint body (710), the joint body (710) is arranged inside the guide pipe (610) located at the tail, a through hole and a tensile wire threading port (720) communicated with the through hole are arranged inside the joint body (710); a positioning hole is arranged on the side wall of the guide pipe (610) located at the tail, and the position of the positioning hole corresponds to that of the through hole; The sphere (730), the sphere (730) is arranged in the through hole, and after part of the sphere (730) exposes out of the through hole, it is embedded in the positioning hole; The spring (740), the spring (740) is arranged in the through hole, and the spring (740) abuts against the sphere (730); A fastening screw (750) that is threadedly engaged with the inner wall of the through-hole and abuts against the spring (740).

8. The wire drawing device for the tension wire inside the cold screen of the cryostat according to claim 7, characterized in that, The inner diameter of the port of the through-hole is smaller than the diameter of the sphere (730).

9. The wire drawing device for the tension wire inside the cold screen of the cryostat according to any one of claims 1 to 8, characterized in that, Further included is: A digital display tensiometer (800), a hook is provided on the connecting section of the digital display tensiometer (800), and the hook is connected to the end of the silk thread away from the inner guide body (600).

10. A wire drawing method for the tension wire inside the cold shield of a cryostat, characterized in that, Including: Insert the first bridge connecting pipe (400) and the second bridge connecting pipe (500) into the cold shield (200) from opposite sides of the thermostat vacuum chamber (100) respectively, and insert the end of the second bridge connecting pipe (500) close to the first bridge connecting pipe (400) into the inside of the first reduced diameter section (410). The inside of the first bridge connecting pipe (400) and the second bridge connecting pipe (500) communicates to form a silk thread guiding channel; Place the first guiding pipe (610) into the silk thread guiding channel, then sequentially connect the remaining guiding pipes (610), and connect the quick-release joint (700) to the silk thread; Pull the silk thread through the silk thread guiding channel by the inner guide body (600), and detect the tension received by the silk thread in real time through the digital display tensiometer (800).

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