Adjustment system and application method of helium cold screen in vacuum tank

Abstract

The present invention discloses an adjustment system and application method of a helium cold screen in a vacuum tank, and specifically relates to the field of mechanical engineering technology. The adjustment system of the helium cold screen in a vacuum tank includes an outer cold screen body and an inner cold screen body, and the outer cold screen body is composed of three outer cold screen monomers. The present invention can complete multi-directional restriction and fixation of the inner cold screen body through the cooperation of multiple positioning mechanisms and inner support mechanisms, and the positioning mechanism and the inner support mechanism can be quickly separated from the inner cold screen body later, reducing the difficulty and workload of installation and disassembly, and improving assembly efficiency. At the same time, the trigger of the control mechanism can complete the support restriction of the inner cold screen body, and the trigger can actively switch and control the conveying state of the control mechanism, complete the locking of the positioning mechanism and the opening control of the inner support mechanism, reducing the control difficulty, and at the same time, the inner cold screen body is debugged and installed in multiple directions through the control mechanism, and the installation accuracy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical engineering, and in particular to a regulating system and an application method of a helium cold screen in a vacuum tank. Background Art

[0002] ‌The vacuum chamber gas-helium cold shield is a key component in superconducting magnetic resonance. The cold shield plays a role in reducing the volatilization of the cryogen in superconducting magnetic resonance, which helps to maintain the stability of the superconducting environment and liquid helium. Usually, cold shields of different temperature levels are set in the ultra-low temperature Dewar vacuum container of the superconducting magnet to more effectively reduce the volatilization of the cryogen. The vacuum chamber gas-helium cold shield is an important component of the superconducting magnetic resonance equipment;

[0003] The cold screens are mostly a combination of an inner cold screen and an outer cold screen, and the pre-assembly of the inner and outer cold screens is the key node of the entire cold screen. Since a single sector needs to meet the assembly accuracy in multiple directions, the pre-assembly of the entire inner cold screen after it is ring-shaped is quite difficult. Only when the inner and outer cold screens each meet the dimensional tolerance requirements can the assembly of the two proceed smoothly, otherwise the adjustment will become very difficult.

[0004] Reference is made to a patent with publication number CN105114807B which discloses an adjustment device for a gas-helium cooling screen in a vacuum tank. The adjustment device is provided with a moving device and a spiral lifting device, thereby being able to drive the gas-helium cooling screen to move in the lateral and longitudinal directions as well as to rotate, thereby reducing the use of manpower and being safe. The overall structure is a frame structure composed of square steel pipes, which meets the strength requirements while ensuring the convenience of personnel operation.

[0005] The above-mentioned adjustment device fixes the helium cold screen to the cold screen fixing bracket by screws, and then performs subsequent adjustment and installation work. However, the cold screen is fixed and adjusted by screws, and it is impossible to quickly complete multi-directional clamping and fixing of the cold screen, and the stability is poor. In addition, the overall operation is time-consuming and labor-intensive, and the assembly is difficult. After the subsequent adjustment, it is also difficult to disassemble in a small space, which increases the difficulty of operation. In addition, the fixing effect of the cold screen is not ideal, and it is easy to deviate during the subsequent adjustment process, which affects the accuracy of installation and debugging. Summary of the invention

[0006] The purpose of the present invention is to provide a regulating system and application method for a helium cold shield in a vacuum tank to solve the above technical problems.

[0007] To solve the above technical problems, the present invention is implemented through the following technical solutions.

[0008] The present invention is a regulating system for a helium cold shield in a vacuum tank, comprising an outer cold shield body and an inner cold shield body, wherein the outer cold shield body is composed of three outer cold shield monomers, each of which comprises an outer cold shield ring body, an outer cold shield head and an outer cold shield bottom plate, and the inner cold shield body is composed of a plurality of inner cold shield monomers, wherein the inner cold shield body is composed of a plurality of inner cold shield monomers, each of which comprises an inner cold shield sector, an upper neck tube, a lower neck tube and a horizontal neck tube, and further comprises:

[0009] A positioning plate is arranged at the bottom of the inner cooling screen body to complete the pre-limitation of multiple inner cooling screen monomers. A plurality of limiting stations are opened in a circular shape on the positioning plate. An internal support mechanism for limiting the inner cooling screen body is added to the positioning plate. The internal support mechanism is divided into a reinforcement component and a trigger component.

[0010] Multiple positioning mechanisms are arranged on multiple limiting stations on the positioning plate, and the positioning and limiting of multiple internal cooling screen monomers are completed through the multiple positioning mechanisms. The internal cooling screen body is restricted and fixed in multiple ways through the cooperation of the multiple positioning mechanisms and the internal supporting mechanisms;

[0011] The control mechanism is arranged at the bottom of the positioning plate to complete the multi-directional adjustment of the internal cooling screen body. At the same time, the positioning mechanism and the internal supporting mechanism are actively controlled through the control mechanism, and the trigger member can cooperate with the control mechanism to complete the free switching of the working states of the positioning mechanism and the internal supporting mechanism through the trigger member.

[0012] Furthermore, an annular pipe is installed on the outer surface of the positioning plate through a bracket, and the annular pipe is connected with a plurality of positioning mechanisms.

[0013] Furthermore, each positioning mechanism comprises:

[0014] Three clamping parts are arranged at the edge of the limiting station in a circular array, each clamping part includes a No. 1 movable chamber, a No. 1 piston part and an extrusion wheel, the No. 1 movable chamber is detachably fixed at the edge of the limiting station, the No. 1 piston part is slidingly sealed in the No. 1 movable chamber, and the extrusion wheel is rotatably mounted on the front end of the No. 1 piston part through a bracket;

[0015] Three No. 1 springs are correspondingly arranged in the No. 1 active cavities of the three clamping parts.

[0016] Furthermore, the reinforcement assembly comprises:

[0017] A center column is integrally arranged on the upper surface of the positioning plate, a flow area is arranged at the center of the center column, and a first gear is fixedly sleeved at the bottom of the center column;

[0018] A plurality of expansion members are arranged in a circular array around the central column, each expansion member includes a No. 2 movable chamber, a No. 2 piston member and an extrusion plate, the No. 2 movable chamber is fixedly arranged on the side wall of the central column, and the No. 2 movable chamber is interconnected with the flow area through a pipeline, the No. 2 piston member is slidingly sealed in the No. 2 movable chamber, and the extrusion plate is arranged at the front end of the No. 2 piston member.

[0019] Furthermore, the reinforcement assembly also includes:

[0020] A plurality of guides are symmetrically arranged at the top and bottom of the back of the extrusion plate, and each guide comprises a guide sleeve and a guide column. The guide sleeve is arranged on the side wall of the central column, and the guide column is slidably installed in the guide sleeve.

[0021] Furthermore, the triggering member includes:

[0022] The annular cavity is fixedly arranged on the upper surface of the positioning plate, and a sensing ring is slidably installed on the top of the annular cavity;

[0023] A plurality of avoidance grooves are hidden in a circular array at the bottom of the annular cavity, and a No. 3 spring is installed in each of the plurality of avoidance grooves.

[0024] Furthermore, the triggering member includes:

[0025] The switching chamber is arranged at the bottom of the central column through a bracket, a top cover is rotatably installed on the top of the switching chamber, and a No. 1 hole and a No. 2 hole are arranged at different heights on both sides of the switching chamber;

[0026] A switching shaft is fixedly arranged at the center of the upper surface of the top cover, and a switching gear is fixedly sleeved outside the switching shaft;

[0027] A driving chamber is arranged on the top of the switching chamber through a bracket, a No. 3 piston is slidably installed in the driving chamber, and a No. 4 spring is installed between the No. 3 piston and the driving chamber;

[0028] A switching rack is arranged on the third piston member and meshes with the switching gear, and active control of the switching shaft is achieved by meshing the switching rack with the switching gear;

[0029] The communicating pipe is arranged between the annular cavity and the driving cavity to realize the communication of the medium.

[0030] Furthermore, the triggering member further comprises:

[0031] A No. 1 stopper, arranged on one side of the lower surface of the top cover, is used for opening and closing control of the No. 1 hole;

[0032] The second stopper is arranged on the other side of the lower surface of the top cover and is used for opening and closing control of the second hole. When the first stopper closes the first hole, the second stopper is staggered with the second hole to form an open state, and the staggered opening and closing control of the first hole and the second hole is completed by the first stopper and the second stopper;

[0033] A No. 1 annular conveying chamber, a rotating sealing sleeve is arranged outside the switching chamber and communicated with the No. 1 hole, a No. 1 pipe is installed on one side of the No. 1 annular conveying chamber, and the No. 1 pipe is communicated with the annular pipe through a pipe;

[0034] The second annular conveying chamber, the rotating sealing sleeve is arranged outside the switching chamber and is connected with the second hole, and a second pipe is installed on one side of the second annular conveying chamber, and the second pipe is connected with the flow area through a pipeline.

[0035] Furthermore, the control mechanism comprises:

[0036] The assembly seat is rotatably arranged on the lower surface of the positioning plate, a debugging area is arranged in the assembly seat, the bottom of the center column rotates correspondingly through the assembly seat and extends into the debugging area, and the center column is fixedly connected with the positioning plate to complete the power connection;

[0037] The control motor is arranged on one side of the assembly seat through a bracket, and a second gear is installed at the output end of the control motor, and the second gear is connected to the reinforcement component;

[0038] The electric lifting platform is set at the bottom of the assembly seat to control the lifting and adjustment of the internal cooling screen body;

[0039] The piston chamber is arranged in the debugging area. The top of the piston chamber is rotatably connected with a transfer tube, the top of the transfer tube is connected with the switching chamber, a piston plate is slidably installed in the piston chamber, and a hydraulic rod transmission-connected with the piston plate is installed at the bottom of the debugging area.

[0040] The present invention also provides a method for adjusting and applying a helium cold screen in a vacuum tank, and the method specifically comprises the following steps:

[0041] Step 1: First, weld the external cold shield body and wait for subsequent assembly;

[0042] Step 2, then assemble the internal cooling screen body, and then transfer the internal cooling screen body to the top of the positioning plate, and complete the initial positioning of the internal cooling screen body through multiple positioning mechanisms;

[0043] Step 3: Complete the multi-directional internal support and fixation of the internal cooling screen body through the internal support mechanism;

[0044] Step 4: The height and rotation of the inner cooling screen body are adjusted through the control mechanism, so that the inner cooling screen body can be adjusted and installed in all directions.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] 1. The present invention can complete multi-directional restriction and fixation of the internal cold screen body through the cooperation of multiple positioning mechanisms and internal support mechanisms, thereby improving stability. The multiple positioning mechanisms can complete clamping and fixing of multiple lower neck tubes of the internal cold screen body, which is beneficial to subsequent multi-directional debugging and installation, avoiding the problem of displacement of the internal cold screen body, and the positioning mechanism and the internal support mechanism can be quickly separated from the internal cold screen body later, thereby reducing the difficulty and workload of installation and disassembly, facilitating recycling, and improving assembly efficiency.

[0047] 2. The present invention is provided with a control mechanism, the triggering member of the control mechanism can complete the support limit of the inner cold screen body, and after sensing the weight of the inner cold screen body, the triggering member is triggered synchronously, which can complete the switching control of the conveying state of the control mechanism, complete the locking of the positioning mechanism and the opening control of the inner support mechanism, thereby reducing the control difficulty. At the same time, the control mechanism completes the multi-directional debugging and installation of the inner cold screen body, thereby improving the installation accuracy and reducing the assembly workload;

[0048] 3. The present invention is provided with an internal support mechanism. After the No. 1 hole is closed and the No. 2 hole is opened, the oil is guided through the No. 2 hole and the circulation area to push the No. 2 piston member to extend out in the No. 2 active chamber, and the No. 2 spring is stretched, so that the extrusion plate moves and contacts with the inner wall of the internal cold screen body to complete the restriction. With the cooperation of the positioning mechanism, the internal cold screen body can be restricted and fixed in multiple ways to avoid the problem of the internal cold screen body being offset and affecting the debugging accuracy.

[0049] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is the overall front view of the present invention;

[0051] Figure 2 This is a schematic diagram of installing the inner cold shield body of the present invention in the outer cold shield body;

[0052] Figure 3 This is a schematic diagram of the separation of the outer cold shield body and the inner cold shield body of the present invention;

[0053] Figure 4 This is a schematic diagram of the main distribution of the positioning plate and the inner cooling screen of the present invention;

[0054] Figure 5 This is a schematic diagram of the distribution of the inner cold shield monomer and the outer cold shield ring body of the present invention;

[0055] Figure 6 This is a schematic diagram of the main body of the internal cooling shield of the present invention;

[0056] Figure 7 It is a schematic diagram of the contact between the inner support mechanism and the inner cooling shield body of the present invention;

[0057] Figure 8 It is a schematic diagram of the connection between the positioning plate and the lower neck tube of the present invention;

[0058] Fig. 9 It is a schematic diagram of the distribution of the positioning mechanism of the present invention on the positioning plate;

[0059] Fig.10 It is a schematic diagram of the positioning mechanism of the present invention;

[0060] Fig.11 It is a schematic diagram of the clamping member of the present invention;

[0061] Fig.12 A schematic diagram of a triggering member of the present invention;

[0062] Fig.13 It is a schematic diagram of the distribution of the trigger member and the inner support mechanism of the present invention;

[0063] Fig.14 It is a schematic diagram of the inner support mechanism of the present invention;

[0064] Fig.15 It is a schematic diagram of the meshing of the first gear and the second gear of the present invention;

[0065] Fig.16 It is a schematic diagram of the control mechanism of the present invention;

[0066] Fig.17 A schematic diagram of a switching room of the present invention;

[0067] Fig.18 This is a schematic diagram of the distribution of the No. 1 blocker and the No. 2 blocker in the switching chamber of the present invention.

[0068] In the figure: 1. External cold shield body; 101. External cold shield ring body; 102. External cold shield head; 103. External cold shield bottom plate; 2. Internal cold shield body; 201. Internal cold shield fan segment; 202. Upper neck tube; 203. Lower neck tube; 204. Horizontal neck tube; 3. Positioning plate; 4. Restriction station; 5. Annular pipeline; 6. No. 1 movable cavity; 7. No. 1 piston member; 8. Extrusion wheel; 9. No. 1 spring; 10. Center column; 11. Flow area; 12. No. 1 gear; 13. No. 2 movable cavity; 14. No. 2 piston member; 15. Extrusion plate; 16. No. 2 spring; 17. Guide sleeve; 18. Guide column; 19. Annular cavity; 20. Sensing ring; 21. Avoidance groove; 22. Spring No. 3; 23. Switching chamber; 24. Top cover; 25. Hole No. 1; 26. Hole No. 2; 27. Switching shaft; 28. Switching gear; 29. ​​Driving chamber; 30. Piston No. 3; 31. Spring No. 4; 32. Switching rack; 33. Connecting pipe; 34. Block No. 1; 35. Block No. 2; 36. Annular conveying chamber No. 1; 37. Annular conveying chamber No. 2; 38. Assembly seat; 39. Debugging area; 40. Control motor; 41. Gear No. 2; 42. Electric lifting platform; 43. Piston chamber; 44. Transfer pipe; 45. Piston plate; 46. Hydraulic rod. DETAILED DESCRIPTION

[0069] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0070] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0071] Embodiment 1: The present invention provides a technical solution: Figures 1 to 7As shown, the regulating system of the helium cold shield in the vacuum tank includes an outer cold shield body 1 and an inner cold shield body 2. The outer cold shield body 1 is composed of three outer cold shield monomers, each of which includes an outer cold shield ring body 101, an outer cold shield head 102 and an outer cold shield bottom plate 103. The outer cold shield head 102 is welded on the top of the outer cold shield ring body 101, and the outer cold shield bottom plate 103 is welded on the bottom of the outer cold shield ring body 101. Each outer cold shield ring body 101 is penetrated with a plurality of No. 1 installation areas that cooperate with the inner cold shield body 2, and each outer cold shield head 102 and the outer cold shield bottom plate 103 are penetrated with a plurality of No. 2 installation areas that cooperate with the inner cold shield body 2. The main body 2 is composed of a plurality of inner cold shield monomers, which are spliced ​​into an annular structure in the outer cold shield main body 1. Each inner cold shield monomer includes an inner cold shield segment 201, an upper neck tube 202, a lower neck tube 203 and a horizontal neck tube 204. The upper neck tube 202 is connected and installed at the top of the inner cold shield segment 201, the lower neck tube 203 is connected and installed at the bottom of the inner cold shield segment 201, and the horizontal neck tube 204 is connected and installed at the front end of the inner cold shield segment 201, and the horizontal neck tube 204 is connected to the No. 1 installation area, the upper neck tube 202 is connected to the No. 1 installation area of ​​the outer cold shield head 102, and the lower neck tube 203 is connected to the No. 1 installation area of ​​the outer cold shield bottom plate 103, and further includes:

[0072] like Figure 8 , Fig. 9 As shown, the positioning plate 3 is arranged at the bottom of the inner cold screen body 2 to complete the pre-limitation of multiple inner cold screen monomers. A plurality of limiting stations 4 are opened in a circular shape on the positioning plate 3. The cross section of the limiting station 4 is specifically one of a circular and a rectangular shape. An internal support mechanism for limiting the inner cold screen body 2 is added to the positioning plate 3. The internal support mechanism is divided into a reinforcement component and a trigger component.

[0073] Multiple positioning mechanisms are arranged on multiple limiting stations 4 on the positioning plate 3, and the positioning and limiting of multiple internal cooling screen monomers are completed through the multiple positioning mechanisms. The internal cooling screen body 2 is restricted and fixed in multiple ways through the cooperation of the multiple positioning mechanisms and the internal supporting mechanisms;

[0074] The control mechanism is arranged at the bottom of the positioning plate 3 to complete the multi-directional adjustment of the internal cooling screen body 2. At the same time, the positioning mechanism and the internal support mechanism are actively controlled by the control mechanism, and the trigger member can cooperate with the control mechanism to complete the free switching of the working states of the positioning mechanism and the internal support mechanism through the trigger member;

[0075] An annular pipe 5 is installed on the outer surface of the positioning plate 3 through a bracket, and the annular pipe 5 is connected with a plurality of positioning mechanisms.

[0076] Among them, electrical components such as the hydraulic rod 46 and the control motor 40 are connected to switches through wires, and the switches are electrically connected to the controller. The specific structure of the controller is not limited. An absolute encoder is installed on the control motor 40 for accurately positioning the control motor 40.

[0077] Embodiment 2: Based on the positioning mechanism provided in Embodiment 1, this embodiment provides a further technical solution for the positioning mechanism.

[0078] like Fig.10 and Fig.11 As shown, each positioning mechanism includes:

[0079] Three clamping parts are arranged in a circular array at the edge of the limiting station 4, each clamping part includes a No. 1 movable chamber 6, a No. 1 piston member 7 and an extrusion wheel 8. The No. 1 movable chamber 6 is detachably fixed at the edge of the limiting station 4, and the No. 1 piston member 7 is slidingly sealed in the No. 1 movable chamber 6. The extrusion wheel 8 is rotatably installed at the front end of the No. 1 piston member 7 through a bracket, and the extrusion wheel 8 is designed to be contoured with the lower neck tube 203, so that the extrusion wheel 8 can be stably fitted with the lower neck tube 203. Two guide rods are symmetrically slidably installed on both sides of the No. 1 movable chamber 6, and the front ends of the two guide rods are connected to the extrusion wheel 8 to complete the guide restriction. Each No. 1 movable chamber 6 is connected to the annular pipeline 5 through a pipeline, and a baffle for limiting the No. 1 piston member 7 is installed at the front end of the No. 1 movable chamber 6 to limit the extension limit of the No. 1 piston member 7;

[0080] It is worth noting that: when the inner cooling shield body 2 is restricted and fixed once: by providing multiple positioning mechanisms, firstly, multiple restriction stations 4 complete the preliminary restriction of multiple lower neck tubes 203 of the inner cooling shield body 2, and then start the hydraulic rod 46 to push the piston plate 45 to move in the piston chamber 43, and send the oil stored in the piston chamber 43 into the switching chamber 23 through the transfer tube 44. Under normal conditions, the No. 1 hole 25 is opened and the No. 2 hole 26 is closed, so that the oil is sent into the No. 1 annular conveying chamber 36 and the annular pipe 5 through the No. 1 hole 25, and then the oil is sent into the No. 1 annular conveying chamber 36 and the annular pipe 5 through the annular pipe 5. At the same time, the oil supply in the No. 1 active chamber 6 of multiple positioning mechanisms is satisfied, and multiple clamping parts are controlled to move. After the oil enters the No. 1 active chamber 6, the No. 1 piston part 7 is pushed to overcome the No. 1 spring 9 and extend in the No. 1 active chamber 6, and the extrusion wheel 8 is pushed to rotate and contact with the lower neck tube 203, so as to complete the synchronous fixation of multiple lower neck tubes 203, which is convenient for subsequent debugging. After that, the internal cold screen body 2 is controlled to continue to move downward. The extrusion wheel 8 and the lower neck tube 203 adopt a rotating design, which can complete the rotation guidance and avoid interference with the debugging of the lower neck tube 203;

[0081] Three No. 1 springs 9 are correspondingly arranged in the No. 1 movable chambers 6 of the three clamping parts, and the No. 1 spring 9 is arranged between the No. 1 movable chamber 6 and the No. 1 piston part 7 to complete the pulling and resetting;

[0082] like Figure 13 to Figure 14 As shown, in an embodiment of the present invention, the reinforcement component includes:

[0083] A center column 10 is integrally arranged on the upper surface of the positioning plate 3. A flow area 11 is arranged at the center of the center column 10. A first gear 12 is fixedly sleeved at the bottom of the center column 10.

[0084] A plurality of expansion members are arranged in a circular array around the central column 10, each expansion member includes a No. 2 movable chamber 13, a No. 2 piston member 14 and an extrusion plate 15, the No. 2 movable chamber 13 is fixedly arranged on the side wall of the central column 10, and the No. 2 movable chamber 13 is interconnected with the circulation area 11 through a pipeline, the No. 2 piston member 14 is slidingly sealed in the No. 2 movable chamber 13, and the extrusion plate 15 is arranged at the front end of the No. 2 piston member 14, a friction pad is installed at the front end of the extrusion plate 15, an end cover is installed at the front end of the No. 2 movable chamber 13, the end cover and the front end of the No. 2 movable chamber 13 are staggered to maintain gas circulation, a No. 2 spring 16 is arranged between the end cover and the No. 2 piston member 14, the No. 2 spring 16 is sleeved on the outside of the No. 2 piston member 14, and the No. 2 piston member 14 is pushed to reset toward the No. 2 movable chamber 13 by the No. 2 spring 16;

[0085] The reinforcement kit also includes:

[0086] A plurality of guides are symmetrically arranged at the top and bottom of the back of the extrusion plate 15, each guide comprising a guide sleeve 17 and a guide column 18, the guide sleeve 17 is arranged on the side wall of the central column 10, the guide column 18 is slidably installed in the guide sleeve 17, and the guide column 18 is detachably fixedly connected to the back of the extrusion plate 15;

[0087] It is worth noting that when the inner cold shield body 2 is restricted and fixed three times: by providing an inner support mechanism, after the No. 1 hole 25 is closed and the No. 2 hole 26 is opened, the hydraulic rod 46 is continuously controlled to move upward, and the oil in the piston chamber 43 is continuously squeezed and transported through the piston plate 45, and the oil is guided through the No. 2 hole 26 and the circulation area 11, and then the oil enters the No. 2 active chamber 13, pushing the No. 2 piston member 14 to extend in the No. 2 active chamber 13, and stretching the No. 2 spring 16, so that the extrusion plate 15 moves to fit and contact with the inner wall of the inner cold shield body 2 to complete the restriction, and at the same time, during the movement of the extrusion plate 15, active restriction is completed through the guide sleeve 17 and the guide column 18, thereby ensuring the accuracy of the movement of the extrusion plate 15 and avoiding deviation;

[0088] like Fig.12 As shown, in an embodiment of the present invention, the triggering member includes:

[0089] The annular cavity 19 is fixedly arranged on the upper surface of the positioning plate 3. The top of the annular cavity 19 is open and concentric with the positioning plate 3. A sensing ring 20 is slidably installed on the top of the annular cavity 19. The sensing ring 20 is in sealing contact with the annular cavity 19. A slideway for limiting the sensing ring 20 is arranged in the annular cavity 19. The upper surface of the sensing ring 20 is contoured with the bottom of the inner cold shield body 2, so that the sensing ring 20 can be stably lifted together with the bottom of the inner cold shield body 2.

[0090] A plurality of avoidance grooves 21 are hidden in a circular array at the bottom of the annular cavity 19, and a No. 3 spring 22 is installed in each of the plurality of avoidance grooves 21, and the No. 3 spring 22 pushes the sensing ring 20 out of the annular cavity 19;

[0091] The trigger includes:

[0092] The switching chamber 23 is arranged at the bottom of the central column 10 through a bracket. The top of the switching chamber 23 is open. A top cover 24 is rotatably installed on the top of the switching chamber 23. A first hole 25 and a second hole 26 are arranged at different heights on both sides of the switching chamber 23.

[0093] The switching shaft 27 is fixedly arranged at the center of the upper surface of the top cover 24, and a switching gear 28 is fixedly sleeved on the outside of the switching shaft 27;

[0094] The driving chamber 29 is arranged on the top of the switching chamber 23 through a bracket. The driving chamber 29 is open on the side facing the switching gear 28. A No. 3 piston 30 is slidably installed in the driving chamber 29. A No. 4 spring 31 is installed between the No. 3 piston 30 and the driving chamber 29. The No. 4 spring 31 pulls the No. 2 piston 14 to return to the driving chamber 29.

[0095] The switching rack 32 is arranged on the third piston member 30 and meshes with the switching gear 28. The active control of the switching shaft 27 is completed by meshing the switching rack 32 with the switching gear 28.

[0096] The communication pipe 33 is arranged between the annular cavity 19 and the driving cavity 29 to complete the communication of the medium, and an assembly groove for hiding the communication pipe 33 is arranged on the side wall of the central column 10. A certain amount of medium is injected into the annular cavity 19, and the medium is specifically one of oil and gas. The medium is transported between the annular cavity 19 and the driving cavity 29 through the communication pipe 33;

[0097] like Figure 17 to Figure 18 As shown, the trigger also includes:

[0098] A No. 1 stopper 34 is provided on one side of the lower surface of the top cover 24 and is used for opening and closing control of the No. 1 hole 25;

[0099] The second stopper 35 is arranged on the other side of the lower surface of the top cover 24 for opening and closing control of the second hole 26, and the first stopper 34 and the second stopper 35 are staggered in normal state. When the first stopper 34 closes the first hole 25, the second stopper 35 and the second hole 26 are staggered to form an open state, and the staggered opening and closing control of the first hole 25 and the second hole 26 is completed by the first stopper 34 and the second stopper 35. At the same time, a convex block for limiting the first stopper 34 and the second stopper 35 can be arranged on one side of the first hole 25 and the second hole 26, so that the overall switching work can be carried out smoothly;

[0100] The first annular conveying chamber 36, the rotary sealing sleeve is arranged outside the switching chamber 23 and communicated with the first hole 25, and a first pipe is installed on one side of the first annular conveying chamber 36, and the first pipe is connected with the annular pipe 5 through a pipe. The connecting pipes of the two are specifically connected by a flexible, rigid and telescopic pipe, which can complete stable rotation and conveying and avoid motion interference;

[0101] The second annular conveying chamber 37, the rotating sealing sleeve is arranged outside the switching chamber 23 and communicated with the second hole 26, and a second pipe is installed on one side of the second annular conveying chamber 37, and the second pipe is connected with the flow area 11 through a pipe. The connecting pipes of the two are specifically connected by a flexible, rigid and telescopic pipe, which can complete stable rotation conveying and avoid motion interference;

[0102] It is worth noting that: when the inner cold screen body 2 is restricted and fixed for the second time: by providing a trigger, the inner cold screen body 2 is continuously moved downward and in contact with the sensing ring 20, and gravity is applied to the sensing ring 20, so that the sensing ring 20 moves downward in the annular cavity 19, and the No. 3 spring 22 is compressed until it reaches the predetermined position. Subsequently, the sensing ring 20, the annular cavity 19 and the positioning plate 3 jointly complete the bottom lifting of the inner cold screen body 2, ensuring the stability of the inner cold screen body 2. Under this action, the medium in the annular cavity 19 is squeezed by the sensing ring 20 and sent out through the connecting pipe 33, and then enters the driving cavity 29, pushing the No. 3 spring 22 to move downward. The plug 30 overcomes the No. 4 spring 31 and extends out in the drive chamber 29. Since the switching rack 32 is meshed with the switching gear 28, when the No. 3 piston 30 is extended, the switching gear 28 and the switching shaft 27 are driven, so that the top cover 24, the No. 1 block 34 and the No. 2 block 35 rotate, the No. 1 block 34 moves to close the open No. 1 hole 25, and the No. 2 block 35 moves to open the closed No. 2 hole 26, so that the opening and closing states of the No. 1 hole 25 and the No. 2 hole 26 are converted. After the No. 1 hole 25 is closed, multiple positioning mechanisms can be locked to avoid positioning deviation problems caused by oil flow.

[0103] Embodiment 3: Based on the control mechanism provided in Embodiment 1, this embodiment provides a further technical solution of the control mechanism.

[0104] like Fig.15 and Fig.16 As shown, the control mechanism includes:

[0105] The assembly seat 38 is rotatably arranged on the lower surface of the positioning plate 3. The assembly seat 38 and the positioning plate 3 are rotatably connected through roller bearings, etc., so that the overall adjustment is smoother. A debugging area 39 is arranged in the assembly seat 38. The bottom of the center column 10 rotates through the assembly seat 38 and extends into the debugging area 39. The center column 10 is fixedly connected with the positioning plate 3 to complete the power connection.

[0106] The control motor 40 is arranged on one side of the assembly seat 38 through a bracket, and a second gear 41 is installed at the output end of the control motor 40, and the second gear 41 is connected to the reinforcement component. Specifically, the second gear 41 is meshed with the first gear 12 of the reinforcement component;

[0107] The electric lifting platform 42 is arranged at the bottom of the assembly seat 38 to control the lifting and lowering adjustment of the inner cooling screen body 2. The electric lifting platform 42 is fixedly arranged in the installation area to facilitate subsequent adjustment. The electric lifting platform 42 can control the inner cooling screen body 2 to move up and down. The electric lifting platform 42 can replace the hydraulic cylinder, electric module and other structures to complete the lifting work;

[0108] The piston chamber 43 is arranged in the debugging area 39. The top of the piston chamber 43 is rotatably connected with a transfer tube 44. The top of the transfer tube 44 is connected with the switching chamber 23. A piston plate 45 is slidably installed in the piston chamber 43. A hydraulic rod 46 connected to the piston plate 45 is installed at the bottom of the debugging area 39. An oil filling port is installed on one side of the piston chamber 43. Oil is injected into the piston chamber 43 to complete the driving control of the internal support mechanism and multiple positioning mechanisms.

[0109] It is worth mentioning that: when adjusting the internal cold screen body 2: by providing a control mechanism, after completing multiple restrictions of the internal cold screen body 2 through the trigger, the internal support mechanism and multiple positioning mechanisms, the electric lifting platform 42 is started to control the internal cold screen body 2 to move up to a predetermined height synchronously. At the same time, the control motor 40 is started, and through the meshing transmission of the No. 1 gear 12 and the No. 2 gear 41, the center column 10, the positioning plate 3 and the internal cold screen body 2 restricted thereon are rotated according to the adjustment direction. With the cooperation of the electric lifting platform 42, the adjustment of the internal cold screen body 2 can be completed, which is beneficial to the assembly of the internal cold screen body 2 and the external cold screen body 1, reduces the overall adjustment difficulty, and improves the adjustment efficiency.

[0110] Embodiment 4: A method for adjusting and applying a helium cold shield in a vacuum tank, the method specifically comprising the following steps:

[0111] Step 1: First, perform corresponding welding operations on the external cold shield body 1 and wait for subsequent assembly;

[0112] Step 2, then assemble the internal cooling shield body 2, and then transfer the internal cooling shield body 2 to the top of the positioning plate 3, and complete the initial positioning of the internal cooling shield body 2 through multiple positioning mechanisms;

[0113] Step 3, completing the multi-directional internal support and fixation of the internal cooling screen body 2 through the internal support mechanism;

[0114] Step 4: The height and rotation of the inner cooling screen body 2 are adjusted by the control mechanism, so that the inner cooling screen body 2 can be adjusted and installed in multiple directions.

[0115] The present invention provides a regulating system and application method for a helium cold shield in a vacuum tank, and the specific working principle is as follows: first, the outer cold shield body 1 is welded correspondingly, and the outer cold shield bottom plate 103 is reserved for subsequent assembly, and then a plurality of inner cold shield monomers are spliced ​​and combined into an annular body, and then the inner cold shield body 2 is transferred to the top of the positioning plate 3, and the plurality of lower neck tubes 203 of the inner cold shield body 2 are controlled to be pre-inserted into a plurality of limiting stations 4 to complete the initial limiting, and then the control mechanism is started to send the oil in the piston chamber 43 into a plurality of positioning mechanisms, and the plurality of clamping parts are synchronously triggered to complete the clamping restriction of the lower neck tube 203, thereby completing a one-time restriction and fixation of the inner cold shield body 2, and because the clamping parts can complete the rotational guidance with the lower neck tube 203, the positioning plate 3 and the inner cold shield body 2 can be relatively moved up and down for adjustment. The inner cold screen body 2 moves downward and contacts the trigger part to complete the lifting, which can perform secondary restriction and fixation on the inner cold screen body 2, complete the trigger control of the trigger part, complete the switching and delivery of the No. 1 hole 25 and the No. 2 hole 26 through the trigger part, and send the oil in the piston chamber 43 into the circulation area 11, and then enter the inner support mechanism, and complete the multi-directional inner support fixation of the inner cold screen body 2 through the inner support mechanism, so as to complete the three-time restriction and fixation of the inner cold screen body 2, and then adjust the height and rotation of the inner cold screen body 2 through the control mechanism, so that the horizontal neck tube 204 and the upper neck tube 202 of the inner cold screen body 2 are respectively debugged corresponding to the No. 1 installation area and the No. 2 installation area reserved on the outer cold screen body, and then wait for assembly and fixation. After the adjustment and assembly are completed, the outer cold screen bottom plate 103 of the outer cold screen body 1 can be assembled;

[0116] The adjustment system can complete multi-directional restriction and fixation of the internal cold screen body 2 through the cooperation of multiple positioning mechanisms and internal support mechanisms, thereby improving stability. The multiple positioning mechanisms can complete clamping and fixing of multiple lower neck tubes 203 of the internal cold screen body 2, which is beneficial to subsequent multi-directional debugging and installation, avoiding the problem of offset of the internal cold screen body 2, and the positioning mechanism and the internal support mechanism can be quickly separated from the internal cold screen body 2 later, reducing the difficulty and workload of installation and disassembly, facilitating recycling, and improving assembly efficiency. At the same time, a control mechanism is provided, and the trigger member of the control mechanism can complete the supporting restriction of the internal cold screen body 2, and synchronously trigger the trigger member after sensing the weight of the internal cold screen body 2, so as to complete the switching control of the conveying state of the control mechanism, complete the locking of the positioning mechanism and the opening control of the internal support mechanism, without the need for external equipment to switch, stable operation, and reduced control difficulty. At the same time, the control mechanism completes multi-directional debugging and installation of the internal cold screen body 2, thereby improving installation accuracy and reducing assembly workload.

[0117] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", 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 present invention. In this specification, the schematic representation 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 one or more embodiments or examples in a suitable manner.

[0118] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A regulating system for a helium cold shield in a vacuum tank, comprising an outer cold shield body and an inner cold shield body, wherein the outer cold shield body is composed of three outer cold shield monomers, each of which comprises an outer cold shield ring body, an outer cold shield head and an outer cold shield bottom plate, and the inner cold shield body is composed of a plurality of inner cold shield monomers, each of which comprises an inner cold shield sector, an upper neck tube, a lower neck tube and a horizontal neck tube, characterized in that: Also includes: A positioning plate is arranged at the bottom of the inner cooling screen body to complete the pre-limitation of multiple inner cooling screen monomers. A plurality of limiting stations are opened in a circular shape on the positioning plate. An internal support mechanism for limiting the inner cooling screen body is added to the positioning plate. The internal support mechanism is divided into a reinforcement component and a trigger component. Multiple positioning mechanisms are arranged on multiple limiting stations on the positioning plate, and the positioning and limiting of multiple internal cooling screen monomers are completed through the multiple positioning mechanisms. The multi-directional limiting and fixing of the internal cooling screen body is completed through the cooperation of the multiple positioning mechanisms and the internal supporting mechanisms; The control mechanism is arranged at the bottom of the positioning plate to complete the multi-directional adjustment of the internal cooling screen body. At the same time, the positioning mechanism and the internal support mechanism are actively controlled by the control mechanism. The triggering member can cooperate with the control mechanism to complete the free switching of the working states of the positioning mechanism and the internal support mechanism through the triggering member. An annular pipe is installed on the outer surface of the positioning plate through a bracket, and the annular pipe is connected with multiple positioning mechanisms; The reinforcement kit includes: A center column is integrally arranged on the upper surface of the positioning plate, a flow area is arranged at the center of the center column, and a first gear is fixedly sleeved at the bottom of the center column; A plurality of expansion members are arranged in a circular array around the central column, each expansion member includes a No. 2 movable chamber, a No. 2 piston member and an extrusion plate, the No. 2 movable chamber is fixedly arranged on the side wall of the central column, and the No. 2 movable chamber is interconnected with the flow area through a pipeline, the No. 2 piston member is slidingly sealed in the No. 2 movable chamber, and the extrusion plate is arranged at the front end of the No. 2 piston member; The trigger includes: The annular cavity is fixedly arranged on the upper surface of the positioning plate, and a sensing ring is slidably installed on the top of the annular cavity; The trigger includes: The switching chamber is arranged at the bottom of the central column through a bracket, a top cover is rotatably installed on the top of the switching chamber, and a No. 1 hole and a No. 2 hole are arranged at different heights on both sides of the switching chamber; A switching shaft is fixedly arranged at the center of the upper surface of the top cover, and a switching gear is fixedly sleeved outside the switching shaft; A driving chamber is arranged on the top of the switching chamber through a bracket, a No. 3 piston is slidably installed in the driving chamber, and a No. 4 spring is installed between the No. 3 piston and the driving chamber; A switching rack is arranged on the third piston member and meshes with the switching gear, and active control of the switching shaft is achieved by meshing the switching rack with the switching gear; A communication pipe is arranged between the annular cavity and the driving cavity to realize the communication of the medium; A No. 1 stopper, arranged on one side of the lower surface of the top cover, is used for opening and closing control of the No. 1 hole; The second stopper is arranged on the other side of the lower surface of the top cover and is used for opening and closing control of the second hole. When the first stopper closes the first hole, the second stopper is misaligned with the second hole to form an open state; The first annular conveying chamber, the rotating sealing sleeve is arranged outside the switching chamber and communicated with the first hole, and the first annular conveying chamber is communicated with the annular pipeline through the pipeline; The second annular conveying chamber, the rotating sealing sleeve is arranged outside the switching chamber and communicated with the second hole, and the second annular conveying chamber is communicated with the circulation area through a pipeline; The control body includes: An assembly seat, rotatably arranged on the lower surface of the positioning plate; The control motor is arranged on one side of the assembly seat through a bracket, and a second gear is installed at the output end of the control motor, and the second gear is connected to the reinforcement component; The electric lifting platform is set at the bottom of the assembly seat to control the lifting and adjustment of the internal cooling screen body; A piston chamber, the top of the piston chamber is rotatably connected with a transfer tube, the top of the transfer tube is connected with the switching chamber, and a piston plate is slidably installed in the piston chamber; A hydraulic rod is drivingly connected to the piston plate.

2. The regulating system of the helium cold shield in the vacuum tank according to claim 1 is characterized in that: Each positioning mechanism includes: Three clamping parts are arranged at the edge of the limiting station in a circular array, each clamping part includes a No. 1 movable chamber, a No. 1 piston part and an extrusion wheel, the No. 1 movable chamber is detachably fixed at the edge of the limiting station, the No. 1 piston part is slidingly sealed in the No. 1 movable chamber, and the extrusion wheel is rotatably mounted on the front end of the No. 1 piston part through a bracket; Three No. 1 springs are correspondingly arranged in the No. 1 active cavities of the three clamping parts.

3. The regulating system of the helium cold shield in the vacuum tank according to claim 2 is characterized in that: The reinforcement kit also includes: A plurality of guides are symmetrically arranged at the top and bottom of the back of the extrusion plate, and each guide comprises a guide sleeve and a guide column. The guide sleeve is arranged on the side wall of the central column, and the guide column is slidably installed in the guide sleeve.

4. The regulating system for the helium cold shield in the vacuum tank according to claim 3 is characterized in that: The trigger includes: A plurality of avoidance grooves are hidden in a circular array at the bottom of the annular cavity, and a No. 3 spring is installed in each of the plurality of avoidance grooves.

5. The regulating system for the helium cold shield in the vacuum tank according to claim 4 is characterized in that: The trigger also includes: A No. 1 pipe is connected to one side of the No. 1 annular conveying chamber, and the staggered opening and closing control of the No. 1 hole and the No. 2 hole is completed through the No. 1 blocker and the No. 2 blocker; A No. 2 pipe is installed on one side of the No. 2 annular conveying chamber.

6. The regulating system for the helium cold shield in the vacuum tank according to claim 5, characterized in that: The control body includes: A debugging area is arranged in the assembly seat, the bottom of the center column rotates correspondingly through the assembly seat and extends into the debugging area, the center column is fixedly connected with the positioning plate to complete the power connection, and the piston chamber is arranged correspondingly in the debugging area.

7. A method for adjusting and applying a helium cold shield in a vacuum tank, using a system for adjusting a helium cold shield in a vacuum tank as claimed in any one of claims 1 to 6, characterized in that: The adjustment application method specifically comprises the following steps: Step 1: First, weld the external cold shield body and wait for subsequent assembly; Step 2, then assemble the internal cooling screen body, and then transfer the internal cooling screen body to the top of the positioning plate, and complete the initial positioning of the internal cooling screen body through multiple positioning mechanisms; Step 3: Complete the multi-directional internal support and fixation of the internal cooling screen body through the internal support mechanism; Step 4: The height and rotation of the inner cooling screen body are adjusted through the control mechanism, so that the inner cooling screen body can be adjusted and installed in all directions.

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