Vacuum detection equipment for interlayer of low-temperature storage tank

Abstract

The invention discloses low-temperature storage tank interlayer vacuum detection equipment which comprises a detection machine, a shell is arranged on the lower side of the detection machine, an inner container is fixedly arranged in the shell, a heat insulation cavity is formed between the shell and the inner container, a connecting mechanism is arranged between the detection machine and the shell, a detection cavity is formed in the detection machine, and a sealing mechanism is arranged on the detection cavity. A connecting cavity is formed in the upper side of the detection cavity, a switch is arranged in the connecting cavity, a sliding cavity is formed in the upper side of the connecting cavity, a control mechanism is arranged on the sliding cavity, a power mechanism is arranged on the upper end face of the detection machine, and a user pulls a handle and controls three gears of vertical movement of a sliding block, so that the operation difficulty of the device can be reduced; the detection machine can be detached and separated from the shell through the clamping piece, the shell is sealed under the action of the sealing plate, the detection machine can be detected and maintained, air pressure detection can be stopped, and aging and abrasion of equipment can be prevented.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum detection, in particular to a low-temperature storage tank interlayer vacuum detection device. Background Art

[0002] Cryogenic storage tanks are used to store and transport cryogenic liquids. Cryogenic storage tanks are usually composed of an inner tank and an outer tank, with insulation materials filled in the middle and evacuated.

[0003] Nowadays, vacuum detectors are directly connected to the mechanism that needs to be detected through pipelines. The internal detection mechanism of the instrument is continuously connected to the mechanism being detected. When the mechanism being detected does not need to be detected, the instrument generally just cuts off the electrical signal, but the detection mechanism is always in working condition. After long-term use, the detection mechanism is prone to aging and failure. Summary of the invention

[0004] The object of the present invention is to provide a low-temperature storage tank interlayer vacuum detection device to overcome the above-mentioned defects in the prior art.

[0005] A low-temperature storage tank interlayer vacuum detection device according to the present invention comprises a detection machine, a shell is provided at the lower side of the detection machine, an inner liner is fixed in the shell, an insulating cavity is provided between the shell and the inner liner, a connecting mechanism for connecting and fixing is provided between the detection machine and the shell, a detection cavity is provided in the detection machine, the detection cavity can be communicated with the insulating cavity, a closing mechanism for controlling the connection is provided on the detection cavity, a connecting cavity is provided on the upper side of the detection cavity, a switch for connecting and disconnecting the connecting cavity and the detection cavity is provided in the connecting cavity, a sliding cavity is provided on the upper side of the connecting cavity, a control mechanism for controlling the switch, the closing mechanism and the connecting mechanism is provided on the sliding cavity, a power mechanism for providing power to the control mechanism is provided on the upper end surface of the detection machine, and the power mechanism can display the pressure of the detection machine and the shell;

[0006] Among them, the control mechanism includes a sliding block which is slidably arranged in the sliding cavity up and down, and two groups of sliding cavities symmetrical up and down are opened on the left and right side walls of the sliding cavity, and an upper sliding block group and a lower sliding block group are slidably arranged in the upper and lower groups of sliding cavities respectively, and the upper and lower side surfaces of the sliding block are inclined to abut against the upper sliding block group and the lower sliding block group, and an upper sliding block cavity and a lower sliding block cavity are respectively opened on the side away from each other of two adjacent sliding cavities, and an upper pull rope and a lower pull rope for control are respectively arranged in the upper sliding block cavity and the lower sliding block cavity.

[0007] Preferably, a slide is fixedly provided at one end of the upper slider group and the lower slider group away from each other, a thrust spring is connected between each of the slides and the corresponding upper slider cavity and the lower slider cavity, the upper pull rope and the lower pull rope are connected to the corresponding slide, two left-right symmetrical swing cavities are provided between the upper slider group and the lower slider group, two left-right groups of connecting rods are hinged between the upper slider group and the lower slider group and located in the swing cavity, a sliding sleeve is sleeved on each group of the connecting rods, a stabilizing spring is provided between each group of the connecting rods, two left-right symmetrical switch cavities are provided in the sliding block, sliders are slidably provided in the two switch cavities, an extrusion spring is connected between one end of the two sliders away from each other and the switch cavity, and the two sliders are connected to the corresponding stabilizing springs by a pull wire.

[0008] Preferably, the power mechanism includes a fixed cylinder fixed on the upper end surface of the detection machine, a rubber block fixed in the fixed cylinder, a pull rod tightly attached to the rubber block, a handle fixed on the upper end of the pull rod, an air pressure detector fixed on the rear side of the fixed cylinder, dials are fixedly connected to the left and right sides of the air pressure detector through fixed rods, the air pressure detector can be connected to the two dial signals respectively, a connecting sleeve is fixed at the lower end of the pull rod, a detection tube is fixed in the connecting sleeve and the sliding block, and the slider can be inserted into the detection tube and closed.

[0009] Preferably, the connecting mechanism includes a connecting tube fixedly arranged on the upper side wall of the heat insulation cavity, a fixed tube fixedly arranged on the lower end surface of the detection machine, the fixed tube capable of being communicated with the connecting tube, a clamping piece is provided at the connection position between the fixed tube and the connecting tube, a slide groove is provided on the inner side surface of the connecting tube, two left-right symmetrical slideways are provided in the connecting tube, sealing plates are slidably arranged on the two slideways, two left-right symmetrical connecting springs are connected between the two sealing plates and the connecting tube, and a rubber pad is fixed on the lower side surface of the slide groove.

[0010] Preferably, the switch includes a disk rotatably arranged at the center of the connecting cavity, an open cavity is opened at the axial position of the disk, and sliding grooves are respectively opened on the lower side walls of the connecting cavity, and the left and right sides of the open cavity extend to the two ends of the disk and penetrate the disk respectively, and connecting blocks are respectively fixed on the left and right sides of the disk, and connecting shafts are rotatably provided in the two connecting blocks, and the connecting shafts extend downward into the sliding grooves, and connecting springs are fixed on the outer peripheries of the two connecting shafts, and the two connecting springs are respectively connected to an upper connecting rope and a lower connecting rope, and the upper connecting rope and the lower connecting rope are respectively connected to the upper pull rope and the lower pull rope, and a gear ring is fixed on the lower side of the two sliding grooves, and a gear meshing with the gear ring is fixed on the outer periphery of the two connecting shafts, and a reset spring is connected between the two connecting shafts and the corresponding sliding grooves.

[0011] Preferably, the closing mechanism includes a switch sliding cavity provided on the left and right side walls of the detection cavity, wedge blocks are slidably provided in the two switch sliding cavities, one end of the two wedge blocks close to each other has a protrusion and the other is recessed, a slide plate cavity is provided on the lower side of the two switch sliding cavities, a sliding plate is fixed at the lower end of the two wedge blocks, a tension spring is connected between the ends of the two sliding plates close to each other and the corresponding slide plate cavity, a rope is connected to the ends of the two sliding plates away from each other, a guide wheel is rotatably provided on the side of the two switch sliding cavities away from each other, the two ropes are connected to the guide wheels away from each other, and then extend upward to be connected to the corresponding upper pull rope.

[0012] Preferably, a vacuum pump is fixedly provided on the left end surface of the detection machine, the vacuum pump is connected with the connecting cavity, and an exhaust pipe is provided at the lower end of the vacuum pump.

[0013] The beneficial effects of the present invention are:

[0014] 1. The user pulls the handle to control the sliding block to move up and down to three different gears, thereby closing and connecting each pipeline, reducing the operating steps of the present invention, and checking and comparing the air pressure through two dials respectively connected to the air pressure detector signal, detecting the air pressure in the detection machine and the air pressure in the insulation cavity, thereby reducing the detection error.

[0015] 2. By connecting the clamping parts of the detector and the shell, the detector can be disassembled from the shell, and the shell is sealed under the action of the sealing plate, which is convenient for inspection and maintenance of the detector. Through the operation of various mechanisms, the pipeline is disconnected from the cavity, and the air pressure detection of the insulation cavity can be stopped to prevent long-term vacuum detection from causing aging and wear of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the appearance of a low-temperature storage tank interlayer vacuum detection device of the present invention;

[0017] Figure 2 It is a schematic diagram of the overall structure of a low-temperature storage tank interlayer vacuum detection device of the present invention;

[0018] Figure 3 It is a partially enlarged schematic diagram of the power mechanism of the present invention;

[0019] Figure 4 It is a partially enlarged schematic diagram of the control mechanism of the present invention;

[0020] Figure 5 It is a partially enlarged schematic diagram of the control mechanism of the present invention;

[0021] Figure 6 The present invention Figure 2 A magnified schematic diagram of AA in the middle;

[0022] Figure 7 The present invention Figure 2 A partial enlarged schematic diagram of the middle connecting cavity;

[0023] Figure 8 is an enlarged schematic diagram of the closing mechanism of the present invention;

[0024] Fig. 9 is an enlarged schematic diagram of the connection mechanism of the present invention;

[0025] In the figure:

[0026] 10. Detection machine; 11. Shell; 12. Inner liner; 13. Insulation cavity; 14. Dial; 15. Handle; 16. Fixed cylinder; 17. Pull rod; 18. Rubber block; 19. Fixed rod; 20. Connecting cavity; 21. Sliding block; 22. Sliding cavity; 23. Connecting sleeve; 24. Detection tube; 25. Sliding block; 26. Switch cavity; 27. Extrusion spring; 28. Pull wire; 29. ​​Sliding cavity; 30. Upper slider cavity; 31. Sliding plate; 32. Upper pull rope; 33. Upper slider group; 34. Lower slider group; 35. Connecting rod; 36. Sliding sleeve; 37. Stabilizing spring; 38. Lower slider cavity; 39. Swinging cavity; 40. Air pressure detector; 41. Lower pull rope; 42. Vacuum pump; 43 , exhaust pipe; 44, slideway; 45, sealing plate; 46, disc; 47, opening cavity; 48, connecting shaft; 49, connecting block; 50, reset spring; 51, sliding groove; 52, connecting spring; 53, upper connecting rope; 54, lower connecting rope; 55, rubber pad; 56, gear; 57, gear ring; 58, switch sliding cavity; 59, wedge block; 60, sliding plate; 61, tension spring; 62, sliding plate cavity; 63, rope; 64, guide wheel; 65, detection cavity; 66, fixing tube; 67, clamping piece; 68, connecting tube; 69, slide groove; 70, thrust spring; 71, closing mechanism; 72, switch; 73, control mechanism; 74, power mechanism; 75, connecting mechanism. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing 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 therefore cannot be understood as a limitation on the present invention.

[0029] Refer to the attached Figure 1-Figure 9 According to an embodiment of the present invention, a low-temperature storage tank interlayer vacuum detection device includes a detection machine 10, a shell 11 is provided at the lower side of the detection machine 10, an inner liner 12 is fixedly provided in the shell 11, a heat insulation cavity 13 is provided between the shell 11 and the inner liner 12, a connection mechanism 75 for connection and fixing is provided between the detection machine 10 and the shell 11, a detection cavity 65 is provided in the detection machine 10, the detection cavity 65 can be communicated with the heat insulation cavity 13, and a sealing mechanism 71 for controlling the communication is provided on the detection cavity 65, A connecting chamber 20 is provided on the upper side of the detection chamber 65, and a switch 72 for connecting and disconnecting the connecting chamber 20 and the detection chamber 65 is provided in the connecting chamber 20. A sliding chamber 22 is provided on the upper side of the connecting chamber 20, and a control mechanism 73 for controlling the switch 72, the closing mechanism 71 and the connecting mechanism 75 is provided on the sliding chamber 22. A power mechanism 74 for providing power to the control mechanism 73 is provided on the upper end surface of the detection machine 10, and the power mechanism 74 can display the pressure inside the detection machine 10 and the housing 11;

[0030] Among them, the control mechanism 73 includes a sliding block 21 that is slidably arranged in the sliding cavity 22 up and down, and two groups of sliding cavities 29 that are symmetrical up and down are opened on the left and right side walls of the sliding cavity 22. An upper slider group 33 and a lower slider group 34 are slidably arranged in the upper and lower groups of the sliding cavities 29 respectively. The upper and lower side surfaces of the sliding block 21 are inclined to abut against the upper slider group 33 and the lower slider group 34. An upper slider cavity 30 and a lower slider cavity 38 are respectively opened on the side away from each other of the two adjacent sliding cavities 29. An upper pull rope 32 and a lower pull rope 41 for control are respectively arranged in the upper slider cavity 30 and the lower slider cavity 38.

[0031] Optionally, a slide plate 31 is fixed to one end of the upper slider group 33 and the lower slider group 34 that are away from each other, a thrust spring 70 is connected between each slide plate 31 and the corresponding upper slider cavity 30 and the lower slider cavity 38, the upper pull rope 32 and the lower pull rope 41 are connected to the corresponding slide plate 31, two left-right symmetrical swing cavities 39 are opened between the upper slider group 33 and the lower slider group 34, and two left-right groups of connecting rods 35 are hinged between the upper slider group 33 and the lower slider group 34 and located in the swing cavity 39, each group of the connecting rods 35 is sleeved with a sliding sleeve 36, and a stabilizing spring is provided between each group of the connecting rods 35 37, the sliding block 21 is provided with two left-right symmetrical switch cavities 26, and the two switch cavities 26 are both slidably provided with sliders 25, and the ends of the two sliders 25 that are away from each other are connected with the switch cavities 26 with extrusion springs 27, and the two sliders 25 are connected with the corresponding stabilizing springs 37 through a pull line 28, and the sliding block 21 moves. When the sliding block 21 moves to the uppermost side of the sliding cavity 22, the upper and lower bevels of the sliding block 21 touch the upper slider group 33 and the lower slider group 34 on the left and right sides, so that the upper slider group 33 abuts against the left and right planes of the sliding block 21, and the lower slider The upper and lower slide blocks 34 are in contact with the lower inclined surface of the sliding block 21, and the upper and lower slide blocks 33 and 34 move different distances respectively, so that the slide block 31 overcomes the spring force of the thrust spring 70 and moves. The two slide blocks 31 on the upper side are close to each other, and the two slide blocks 31 on the lower side are away from each other, so that the air pressure in the connecting cavity 20 is detected by controlling the upper pull rope 32 and the lower pull rope 41. When the sliding block 21 moves to the middle position of the sliding cavity 22, similarly, the upper and lower slide blocks 33 and 34 are in contact with the left and right side planes of the sliding block 21 under the action of the lower slide cavity 38. Abutment, at this time, the two connecting rods 35 are parallel to the left and right side planes of the sliding block 21 and the distance between the stabilizing spring 37 and the sliding block 25 is the shortest. At this time, the pull wire 28 connected to the stabilizing spring 37 is relaxed, so that the two sliding blocks 25 are close to each other under the spring force of the extrusion spring 27 to perform vacuum pumping. Similarly, when the sliding block 21 is located at the bottom of the sliding cavity 22, the upper sliding block group 33 abuts against the upper inclined surface of the sliding block 21, and the lower sliding block group 34 abuts against the plane of the sliding block 21. The upper pull rope 32 is taut, and the lower pull rope 41 is relaxed to detect the pressure of the insulation cavity 13.

[0032] Optionally, the power mechanism 74 includes a fixed cylinder 16 fixed on the upper end surface of the detection machine 10, a rubber block 18 is fixed in the fixed cylinder 16, a pull rod 17 is tightly attached to the rubber block 18, a handle 15 is fixed on the upper end of the pull rod 17, an air pressure detector 40 is fixed on the rear side of the fixed cylinder 16, and the left and right sides of the air pressure detector 40 are fixedly connected to the dial 14 through a fixed rod 19, and the air pressure detector 40 can be respectively connected to the two dials 14 signals, a connecting sleeve 23 is fixed at the lower end of the pull rod 17, and a detection tube 24 is fixed in the connecting sleeve 23 and the sliding block 21, and the slider 25 can be inserted into the detection tube 24 to close,

[0033] Through the control mechanism 73, when the sliding block 21 is located at the uppermost side to detect the air pressure of the connecting chamber 20, the two sliding blocks 25 move away from each other, the disk 46 rotates to connect the detection tube 24 with the connecting chamber 20, the detection chamber 65 approaches each other and closes, the air pressure detector 40 works to detect the air pressure, and at the same time, the dial 14 located on the left side is connected to the signal of the air pressure detector 40, so that the pointer in the dial 14 can rotate to display the air pressure in the connecting chamber 20. Similarly, when the sliding block 21 is located at the lowermost side, the two sliding blocks 25 move away from each other, and when the disk 46 rotates, the detection tube 24 disconnects the connection relationship with the connecting chamber 20, and the two wedge blocks 59 move away from each other and open, so that the detection tube 24 is connected with the detection chamber 65.

[0034] Optionally, the connecting mechanism 75 includes a connecting pipe 68 fixedly arranged on the upper side wall of the heat insulation cavity 13, a fixed pipe 66 is fixedly arranged on the lower end surface of the detection machine 10, the fixed pipe 66 can be communicated with the connecting pipe 68, a clamping member 67 is arranged at the connection position between the fixed pipe 66 and the connecting pipe 68, a slide groove 69 is arranged on the inner side surface of the connecting pipe 68, two left-right symmetrical slideways 44 are arranged in the connecting pipe 68, sealing plates 45 are slidably arranged on the two slideways 44, and two left-right symmetrical connecting members are connected between the two sealing plates 45 and the connecting pipe 68 Spring 52, a rubber pad 55 is fixedly provided on the lower side of the slide groove 69, and the fixing tube 66 and the connecting tube 68 can be fixedly connected through the clamping piece 67, so that the communication between the detection chamber 65 and the insulation chamber 13 can be achieved. When the clamping piece 67 is loosened, the fixing tube 66 can be taken out of the connecting tube 68, and the sealing plate 45 slides downward along the track of the slideway 44 under the action of atmospheric pressure, so that the sealing plate 45 is firmly abutted against the rubber pad 55, thereby achieving a closed state between the insulation chamber 13 and the outside of the connecting tube 68.

[0035] Optionally, the switch 72 includes a disk 46 rotatably arranged at the center of the connecting cavity 20, an open cavity 47 is opened at the axial position of the disk 46, sliding grooves 51 are respectively opened on the lower side walls of the connecting cavity 20, and the left and right sides of the open cavity 47 extend to the two ends of the disk 46 and penetrate the disk 46 respectively, and connecting blocks 49 are respectively fixed on the left and right sides of the disk 46, and connecting shafts 48 are rotatably provided in the two connecting blocks 49, and the connecting shafts 48 extend downward into the sliding grooves 51, and connecting springs 52 are fixed on the outer peripheries of the two connecting shafts 48, and the two connecting springs 52 are respectively connected to an upper connecting rope 53 and a lower connecting rope 54, and the upper connecting rope 53 and the lower connecting rope 54 are respectively connected to the upper pull rope 32 and the lower pull rope 41, and a gear ring 57 is fixed on the lower side of the two sliding grooves 51, and a gear ring 57 is fixed on the outer periphery of the two connecting shafts 48 The gear 56 is connected to each other, and a return spring 50 is connected between the two connecting shafts 48 and the corresponding sliding grooves 51. The upper connecting rope 53 is loosened and the lower connecting rope 54 is tightened to drive the connecting shaft 48 to rotate. The engagement between the ring gear 57 and the ring gear 57 drives the connecting shaft 48 to move around the axis of the disk 46, so that the open cavity 47 is disconnected from the connecting cavity 20, and the air pressure of the insulation cavity 13 is detected. The air pressure detector 40 is connected to the signal of the dial 14 located on the right side to control the rotation of the pointer in the dial 14, so as to display the air pressure in the insulation cavity 13. The upper connecting rope 53 is tightened and the lower connecting rope 54 is loosened to drive the connecting shaft 48 to reverse. Similarly, the open cavity 47 is connected with the connecting cavity 20, and the pressure in the connecting cavity 20 is detected, and the value is displayed on the dial 14 located on the left side.

[0036] Optionally, the closing mechanism 71 includes a switch sliding cavity 58 provided on the left and right side walls of the wedge block 59, and wedge blocks 59 are slidably provided in the two switch sliding cavities 58. The ends of the two wedge blocks 59 that are close to each other have one protrusion and one depression, and the lower sides of the two switch sliding cavities 58 are provided with a slide plate cavity 62. The lower ends of the two wedge blocks 59 are fixed with a sliding plate 60, and a tension spring 61 is connected between the ends of the two sliding plates 60 that are close to each other and the corresponding slide plate cavity 62. The ends of the two sliding plates 60 that are away from each other are connected with a rope 63. The sides of the two switch sliding cavities 58 that are away from each other are rotatably provided with a guide wheel 64, and the two ropes 63 are connected to the guide wheel 64 away from each other, and then extend upward to be connected to the corresponding upper pull rope 32.

[0037] By loosening and tightening the sliding cavity 29 , the state of the rope 63 is controlled, so that the two wedge blocks 59 are driven to move away from or closer to each other under the action of the tension spring 61 .

[0038] Optionally, a vacuum pump 42 is fixedly provided on the left end surface of the detection machine 10, the vacuum pump 42 is connected to the connecting chamber 20, and an exhaust pipe 43 is connected to the lower end of the vacuum pump 42.

[0039] The vacuum pump 42 can extract the gas in the detector 10 so that when the air pressure detector 40 is connected to the insulation cavity 13 , the gas in the detector 10 can be prevented from entering the insulation cavity 13 and causing detection errors.

[0040] A low-temperature storage tank interlayer vacuum detection device of the present invention has the following working process:

[0041] When performing vacuum detection, the sliding block 21 moves. When the sliding block 21 moves to the uppermost side of the sliding chamber 22, the upper and lower inclined surfaces of the sliding block 21 touch the upper and lower sliding block groups 33 and the lower sliding block groups 34 on the left and right sides, so that the upper sliding block group 33 abuts against the left and right side planes of the sliding block 21, and the lower sliding block group 34 abuts against the lower inclined surface of the sliding block 21. The upper sliding block group 33 and the lower sliding block group 34 move different distances respectively, so that the sliding plate 31 overcomes the spring force of the thrust spring 70 and moves. The two sliding plates 31 on the upper side move closer to each other, and the two sliding plates 31 on the lower side move away from each other, so that the air pressure in the connecting chamber 20 is detected by controlling the upper pull rope 32 and the lower pull rope 41. When the sliding block 21 moves to the sliding chamber 22, the upper and lower sliding blocks 33 and 34 are in contact with each other. When the sliding block 21 is in the middle position of the cavity 22, similarly, the upper slider group 33 and the lower slider group 34 abut against the left and right side planes of the sliding block 21 under the action of the lower slider cavity 38. At this time, the two connecting rods 35 are parallel to the left and right side planes of the sliding block 21 and the distance between the stabilizing spring 37 and the slider 25 is the shortest. At this time, the pull wire 28 connected to the stabilizing spring 37 is relaxed, so that the two sliders 25 are close to each other under the spring force of the extrusion spring 27 to perform vacuum pumping. Similarly, when the sliding block 21 is located at the lowest point of the sliding cavity 22, the upper slider group 33 abuts against the upper side inclined surface of the sliding block 21, and the lower slider group 34 abuts against the plane of the sliding block 21. The upper pull rope 32 is tightened and the lower pull rope 41 is relaxed to detect the pressure of the insulation cavity 13.

[0042] Through the control mechanism 73, when the sliding block 21 is located at the uppermost side to detect the air pressure in the connecting chamber 20, the two sliders 25 move away from each other, the disk 46 rotates to connect the detection tube 24 with the connecting chamber 20, the wedge blocks 59 move closer to each other and close, the air pressure detector 40 works to detect the air pressure, and at the same time, the dial 14 on the left side is connected to the signal of the air pressure detector 40 so that the pointer in the dial 14 can rotate to display the air pressure in the connecting chamber 20. Similarly, when the sliding block 21 is located at the lowermost side, the two sliders 25 move away from each other, and when the disk 46 rotates, the detection tube 24 is disconnected from the connecting chamber 20, and the two wedge blocks 59 move away from each other and open, so that the detection tube 24 is connected with the detection chamber 65.

[0043] The fixing tube 66 and the connecting tube 68 can be fixedly connected by the clamping piece 67, so that the communication between the detection cavity 65 and the heat-insulating cavity 13 can be achieved. When the clamping piece 67 is loosened, the fixing tube 66 can be taken out of the connecting tube 68, and the sealing plate 45 slides downward along the track of the slide 44 under the action of atmospheric pressure, so that the sealing plate 45 is firmly in contact with the rubber pad 55, thereby achieving a closed state between the heat-insulating cavity 13 and the outside of the connecting tube 68.

[0044] By loosening the upper connecting rope 53 and tightening the lower connecting rope 54, the connecting shaft 48 is driven to rotate, and the engagement between the ring gear 57 and the ring gear 57 drives the connecting shaft 48 to move around the axis of the disk 46, so that the open cavity 47 is disconnected from the connecting cavity 20, and the air pressure of the insulation cavity 13 is detected. The air pressure detector 40 is connected to the signal of the dial 14 located on the right side to control the rotation of the pointer in the dial 14, thereby displaying the air pressure in the insulation cavity 13. By tightening the upper connecting rope 53 and loosening the lower connecting rope 54, the connecting shaft 48 is driven to reverse. Similarly, the open cavity 47 is connected to the connecting cavity 20, and the pressure in the connecting cavity 20 is detected, and the value is displayed on the dial 14 on the left.

[0045] By loosening and tightening the sliding cavity 29, the state of the rope 63 is controlled, so that the two wedge blocks 59 are driven to move away from or closer to each other under the action of the tension spring 61.

[0046] By operating the vacuum pump 42, the gas existing in the detection machine 10 can be extracted, so that when the air pressure detector 40 is connected to the insulation chamber 13, the gas in the detection machine 10 is prevented from entering the insulation chamber 13 and causing detection errors.

[0047] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-temperature storage tank interlayer vacuum detection device, comprising a detection machine (10), characterized in that: The detection machine (10) is provided with a shell (11) at the lower side, an inner liner (12) is fixedly provided in the shell (11), a heat-insulating cavity (13) is provided between the shell (11) and the inner liner (12), a connecting mechanism (75) for connecting and fixing is provided between the detection machine (10) and the shell (11), a detection cavity (65) is provided in the detection machine (10), the detection cavity (65) can be communicated with the heat-insulating cavity (13), a closing mechanism (71) for controlling the communication is provided on the detection cavity (65), and a connecting cavity (20) is provided on the upper side of the detection cavity (65). ), a switch (72) for connecting and disconnecting the connecting chamber (20) and the detection chamber (65) is provided in the connecting chamber (20), a sliding chamber (22) is provided on the upper side of the connecting chamber (20), a control mechanism (73) for controlling the switch (72), the closing mechanism (71) and the connecting mechanism (75) is provided on the sliding chamber (22), a power mechanism (74) for providing power to the control mechanism (73) is provided on the upper end surface of the detection machine (10), and the power mechanism (74) can display the pressure inside the detection machine (10) and the housing (11); The control mechanism (73) comprises a sliding block (21) which is slidably arranged in the sliding cavity (22) up and down, and two groups of sliding cavities (29) which are symmetrical up and down are opened on the left and right side walls of the sliding cavity (22). An upper sliding block group (33) and a lower sliding block group (34) are slidably arranged in the upper and lower groups of the sliding cavities (29), respectively. The upper and lower side surfaces of the sliding block (21) are inclined to abut against the upper sliding block group (33) and the lower sliding block group (34), and an upper sliding block cavity (30) and a lower sliding block cavity (38) are respectively opened on the side away from each other of two adjacent sliding cavities (29), and an upper pull rope (32) and a lower pull rope (41) for control are respectively arranged in the upper sliding block cavity (30) and the lower sliding block cavity (38).

2. The low-temperature storage tank interlayer vacuum detection equipment according to claim 1 is characterized in that: A slide plate (31) is fixedly provided at one end of the upper slide block group (33) and the lower slide block group (34) which are away from each other. A thrust spring (70) is connected between each slide block (31) and the corresponding upper slide block cavity (30) and the lower slide block cavity (38). The upper pull rope (32) and the lower pull rope (41) are connected to the corresponding slide block (31). Two left-right symmetrical swing cavities (39) are provided between the upper slide block group (33) and the lower slide block group (34). Two groups of connecting rods (35) are hinged in the left and right sides, each group of connecting rods (35) is provided with a sliding sleeve (36), and a stabilizing spring (37) is provided between each group of connecting rods (35). Two left-right symmetrical switch cavities (26) are provided in the sliding block (21), and sliders (25) are slidably provided in the two switch cavities (26). An extrusion spring (27) is connected between the ends of the two sliders (25) that are away from each other and the switch cavities (26), and the two sliders (25) and the corresponding stabilizing springs (37) are connected by a pull wire (28).

3. The low-temperature storage tank interlayer vacuum detection equipment according to claim 2 is characterized in that: The power mechanism (74) includes a fixed cylinder (16) fixed on the upper end surface of the detection machine (10), a rubber block (18) fixed in the fixed cylinder (16), a pull rod (17) tightly attached in the rubber block (18), a handle (15) fixed at the upper end of the pull rod (17), an air pressure detector (40) fixed on the rear side of the fixed cylinder (16), the left and right sides of the air pressure detector (40) are fixedly connected to the dial (14) through a fixed rod (19), the air pressure detector (40) can be respectively connected to the two dials (14) by signal, a connecting sleeve (23) fixed at the lower end of the pull rod (17), a detection tube (24) fixed in the connecting sleeve (23) and the sliding block (21), and the sliding block (25) can be inserted into the detection tube (24) to be closed.

4. The low-temperature storage tank interlayer vacuum detection equipment according to claim 1 is characterized in that: The connecting mechanism (75) includes a connecting tube (68) fixedly mounted on the upper side wall of the heat-insulating cavity (13); a fixed tube (66) is fixedly mounted on the lower end surface of the detection machine (10); the fixed tube (66) can be connected to the connecting tube (68); a clamping member (67) is provided at the connection position between the fixed tube (66) and the connecting tube (68); a slide groove (69) is provided on the inner side surface of the connecting tube (68); two left-right symmetrical slideways (44) are provided in the connecting tube (68); sealing plates (45) are slidably mounted on the two slideways (44); two left-right symmetrical connecting springs (52) are connected between the two sealing plates (45) and the connecting tube (68); a rubber pad (55) is fixedly mounted on the lower side surface of the slide groove (69).

5. The low-temperature storage tank interlayer vacuum detection equipment according to claim 1 is characterized in that: The switch (72) comprises a disk (46) rotatably arranged at the center of the connecting cavity (20); an opening cavity (47) is provided at the axial position of the disk (46); sliding grooves (51) are respectively provided on the lower side walls of the connecting cavity (20); the left and right sides of the opening cavity (47) respectively extend to the two ends of the disk (46) and penetrate the disk (46); connecting blocks (49) are respectively fixed on the left and right sides of the disk (46); connecting shafts (48) are rotatably provided in the two connecting blocks (49); the connecting shafts (48) extend downwardly into the sliding grooves (51); the two connecting blocks (49) are respectively fixed with connecting shafts (48) and the connecting shafts (48) extend downwardly into the sliding grooves (51); A connecting spring (52) is fixedly provided on the outer periphery of the connecting shaft (48), and an upper connecting rope (53) and a lower connecting rope (54) are respectively connected to the two connecting springs (52), and the upper connecting rope (53) and the lower connecting rope (54) are respectively connected to the upper pull rope (32) and the lower pull rope (41), and a gear ring (57) is fixedly provided on the lower side of the two sliding grooves (51), and a gear (56) meshing with the gear ring (57) is fixedly provided on the outer periphery of the two connecting shafts (48), and a reset spring (50) is connected between the two connecting shafts (48) and the corresponding sliding grooves (51).

6. The low-temperature storage tank interlayer vacuum detection equipment according to claim 1 is characterized in that: The closing mechanism (71) comprises a switch sliding cavity (58) provided on the left and right side walls of the detection cavity (65), wedge blocks (59) are slidably provided in the two switch sliding cavities (58), one end of the two wedge blocks (59) being close to each other has a protrusion and the other is concave, a slide plate cavity (62) is provided on the lower side of the two switch sliding cavities (58), a sliding plate (60) is fixed at the lower end of the two wedge blocks (59), a tension spring (61) is connected between the ends of the two sliding plates (60) close to each other and the corresponding slide plate cavity (62), a rope (63) is connected to the ends of the two sliding plates (60) away from each other, and a guide wheel (64) is rotatably provided on the side of the two switch sliding cavities (58) away from each other, the two ropes (63) are connected to the guide wheel (64) away from each other, and then extend upward to be connected to the corresponding upper pull rope (32).

7. The low-temperature storage tank interlayer vacuum detection equipment according to claim 6 is characterized in that: A vacuum pump (42) is fixedly provided on the left end surface of the detection machine (10), the vacuum pump (42) is connected to the connecting chamber (20), and an exhaust pipe (43) is provided at the lower end of the vacuum pump (42).

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