A static evaporation rate measuring device for low temperature containers

Abstract

The invention discloses a static evaporation rate measuring device for a low-temperature container, which belongs to the technical field of low-temperature container detection. The static evaporation rate measuring device for a low-temperature container comprises a test gas path box. By setting an adjustment plate, when the static evaporation rate of the low-temperature container is used daily through the measuring device, in order to improve the synchronous shielding and protection effect of the inner walls of the air intake pipe and the exhaust pipe when the measuring device needs to be moved, before the device is moved, the servo motor can be turned on to drive the sliding rod to slide along the inner wall of the limit groove through the rotation of the swing rod. At the same time, the movement of the lifting rod drives the connecting tooth plate fixedly connected to the telescopic rod to perform telescopic movement through the rotation of the pulling rod. The sliding of the connecting tooth plate drives the adjustment plate fixedly connected to the connecting shaft to perform flipping movement through the connection of the connecting gear. Under the action of the sealing ring, the inner wall diameter of the air intake pipe is effectively sealed and shielded, thereby reducing the interference of dust on the measurement data.

Description

Technical Field

[0001] The present invention relates to the technical field of low-temperature container detection, and in particular to a static evaporation rate measuring device for a low-temperature container. Background Art

[0002] Cryogenic liquid container, also known as cryogenic liquid storage and transportation equipment, is a general term for Dewar containers, liquid storage vessels, and storage tanks (tank trucks, tank ships). According to different storage media, they are divided into: liquid oxygen containers, liquid nitrogen containers, liquid argon containers, liquid hydrogen containers, liquefied natural gas containers, etc. The static evaporation rate test refers to: when the cryogenic liquid container is at the rated filling rate and is left to stand to reach thermal equilibrium, the percentage of the mass of the cryogenic liquid lost by natural evaporation within 24 hours to the mass of the cryogenic liquid under the effective volume of the inner container, expressed as percentage per day (% / d).

[0003] Static evaporation rate measurement is one of the most critical and important inspection items in the inspection process of cryogenic liquid containers. Cryogenic liquids are stored in the inner liner of welded insulated gas cylinders. Insulation materials are wrapped between the inner liner and the outer liner and the interlayer is evacuated to achieve insulation. The purpose of the static evaporation rate test is to detect the vacuum effect of the gas cylinder without destroying the vacuum of the gas cylinder interlayer to monitor the cold insulation of the container. There are two main methods for measuring the static evaporation rate of cryogenic liquid containers: weighing method and steam flow measurement method. The weighing method is to place the container on a weight meter after the cryogenic liquid is filled. After reaching thermal equilibrium, the amount of liquefied gas loss within 24 hours is measured. The weighing method is mostly used in gas cylinder production and manufacturing units. This method is not easy to implement for regular inspection of gas cylinders, and has poor accuracy and many human influence factors. Therefore, it is rarely used in regular inspection of gas cylinders. At present, the method used more in regular inspection of gas cylinders is steam flow measurement method, which measures the mass flow of evaporated gas through flow meters, such as wet flow meters, dry flow meters, rotor flow meters and other instruments.

[0004] After searching, according to the patent network CN117782885A, a static evaporation rate test device for a low-temperature container is disclosed, which relates to the field of low-temperature container detection technology. The invention includes a test gas circuit and a processor. The test gas circuit includes a mass flowmeter. The test gas circuit is installed in a test gas circuit box. The air inlet and the air outlet of the test gas circuit extend out of the test gas circuit box, and the processor is installed in a test circuit box; a connecting hole is opened on the test gas circuit box, and the test gas circuit is electrically connected to the processor through the connecting hole. A power supply for supplying power to the test gas circuit and the processor is installed in the test circuit box; the test gas circuit box adopts an explosion-proof cabinet. The invention ensures the safety of the test by installing the test gas circuit and the processor in the test gas circuit box and the test circuit box respectively, and the test gas circuit box adopts an explosion-proof cabinet; at the same time, a power supply is installed in the test circuit box to avoid abnormal loss of processor data in the test circuit box due to power failure, thereby ensuring the stability of the test.

[0005] However, although the existing measuring device can perform good measurement operations on the static evaporation rate of the low-temperature container when in use, when the device needs to be moved or is not in use, the synchronous shielding and sealing effect of the inner walls of the intake pipe and the exhaust pipe is not high, which makes it easy for dust or impurities to enter the intake pipe and the exhaust pipe when the device is moved and placed, causing the subsequent evaporation rate measurement data of the measuring device to decrease. In addition, when the measuring device is used for a long time, the fire safety protection effect of the measuring device is not high, so that when sparks appear in the device, the first-time rescue effect is not good, which affects the long-term use safety of the measuring device and does not meet people's use needs. For this reason, we propose a static evaporation rate measuring device for low-temperature containers. Summary of the invention

[0006] The object of the present invention is to provide a static evaporation rate measuring device for a low-temperature container to solve the problems raised in the above-mentioned background technology that when the device needs to be moved and when the device is not in use, the synchronous shielding and sealing effect of the inner walls of the air inlet pipe and the exhaust pipe is not high, and when the measuring device is used for a long time, the fire safety protection effect of the measuring device is not high.

[0007] The present invention is implemented as follows: a low-temperature container static evaporation rate measuring device, comprising a test gas circuit box, the test gas circuit box comprising an air inlet pipe, an exhaust pipe, a test circuit box and a protective mechanism arranged on the outer wall of the test gas circuit box, the outer wall of the test gas circuit box is extended with an air inlet pipe, the outer wall of the test gas circuit box is extended with an exhaust pipe, and the top of the test gas circuit box is detachably connected with the test circuit box;

[0008] The protection mechanism includes a sliding assembly, a lifting assembly and a rotating assembly;

[0009] The sliding assembly includes a servo motor, a swing rod, a sliding rod and a limit groove. The back of the test gas circuit box is fixedly connected to the servo motor, the output end of the servo motor is fixedly connected to the swing rod rotatably connected to the outer wall of the test gas circuit box, the outer wall of the swing rod is slidably connected to the sliding rod, and the connection part between the outer wall of the swing rod and the sliding rod is provided with a limit groove;

[0010] The lifting assembly includes a lifting rod, a limiting rod and a pulling rod, the outer wall of the sliding rod is fixedly connected to the lifting rod slidably connected to the outer wall of the test gas circuit box body, the outer wall of the lifting rod is slidably connected to the limiting rod fixedly connected to the outer wall of the test gas circuit box body, and the outer wall of the lifting rod is rotatably connected to the pulling rod;

[0011] The rotating assembly includes a connecting tooth plate, a telescopic rod, a connecting gear,

[0012] A connecting shaft, an adjusting plate and a sealing ring, one end of the pulling rod is rotatably connected to a connecting tooth plate telescopically connected to the outer wall of the test air circuit box body, the outer wall of the connecting tooth plate is fixedly connected to a telescopic rod fixedly connected to the outer wall of the test air circuit box body, the outer wall of the connecting tooth plate is meshed with a connecting gear rotatably connected to the outer wall of the intake pipe, the rotation center of the connecting gear is fixedly connected to a connecting shaft, one end of the connecting shaft is fixedly connected to an adjusting plate rotatably connected to the inner wall of the intake pipe, and the inner wall of the intake pipe is provided with a sealing ring located on one side of the adjusting plate.

[0013] Preferably, a protection mechanism is provided on the top of the test circuit box.

[0014] Preferably, the test air circuit box and the test circuit box are detachably connected by bolts and nuts, and the sliding rod forms a sliding structure between the servo motor, the swing rod and the limit groove. Two groups of sliding rods and limit grooves are provided, and the positions of the two groups of sliding rods and limit grooves are equidistantly distributed about the rotation center of the swing rod.

[0015] Preferably, the lifting rod forms a lifting structure through the sliding rod and the limiting groove and the limiting rod, and two groups of lifting rods are provided. The sliding directions of the two groups of lifting rods are opposite, and the lifting rods and the sliding rods are arranged in a one-to-one correspondence.

[0016] Preferably, the pulling rod forms a rotating structure through the lifting rod and the connecting tooth plate, and the connecting tooth plate forms a telescopic structure through the pulling rod and the telescopic rod.

[0017] Preferably, the adjustment plate forms a rotating structure with the intake pipe through a connecting gear and a connecting shaft, the rotation centers of the connecting gear, the connecting shaft and the adjustment plate are on the same horizontal plane, two groups of sealing rings are provided, and the positions of the two groups of sealing rings are symmetrically distributed about the central axis of the adjustment plate, and the adjustment plate is respectively provided in a one-to-one correspondence with the intake pipe and the exhaust pipe.

[0018] Preferably, the protection mechanism includes a mounting plate, a first nut, a first bolt, a slot, a fixed block, a fire extinguisher body, a second nut, a second bolt, a connecting rod, a connecting block, a spring and a clamping block, the top of the test circuit box is detachably connected to the mounting plate, the side wall of the mounting plate is provided with a first nut, the inner wall of the first nut is threadedly connected to the first bolt which is slidably connected to the outer wall of the test circuit box, a slot is provided at the connecting portion between the outer wall of the test circuit box and the first bolt, the top of the mounting plate is fixedly connected to the fixing block, the top of the mounting plate is provided with a fire extinguisher body which fits the outer wall of the fixing block, the top of the mounting plate is provided with a second nut, the inner wall of the second nut is threadedly connected to the second bolt, one end of the second bolt is rotatably connected to the clamping block located on one side of the fire extinguisher body, the outer wall of the clamping block is fixedly connected to a connecting rod which is slidably connected to the top of the mounting plate, the end of the connecting rod is fixedly connected to the connecting block, and the outer wall of the connecting block is fixedly connected to a spring which is fixedly connected to the top of the mounting plate.

[0019] Preferably, the slot is arranged on the movement track of the first bolt, and the mounting plate forms a locking structure with the test circuit box through the first bolt and the slot. The first bolt and the slot are provided in two groups, and the position distribution of the two groups of the first bolts and the slots are symmetrical about the central axis of the mounting plate.

[0020] Preferably, the clamping block forms a telescopic structure with the mounting plate through the second bolt and the connecting rod, the outer wall contours of the contact parts between the clamping block and the fixing block and the fire extinguisher body are arc-shaped, and the contact parts between the clamping block and the fixing block and the fire extinguisher body are provided with anti-slip grooves.

[0021] The static evaporation rate measuring device for a low-temperature container provided by the present invention has the following beneficial effects when used:

[0022] The static evaporation rate measuring device of a low-temperature container is provided with an adjustment plate. When the static evaporation rate of the low-temperature container is measured in daily use through the measuring device, in order to improve the synchronous shielding and protection effect of the inner walls of the air intake pipe and the exhaust pipe when the measuring device needs to be moved, before the device is moved, the servo motor can be turned on to drive the sliding rod to slide along the inner wall of the limit groove through the rotation of the swing rod, and the sliding of the sliding rod drives the lifting rod to perform lifting and lowering movement along the outer wall of the limit rod. At the same time, the movement of the lifting rod drives the connecting tooth plate fixedly connected to the telescopic rod to perform telescopic movement through the rotation of the pulling rod, and the sliding of the connecting tooth plate drives the adjustment plate fixedly connected to the connecting shaft to perform flipping movement through the connection of the connecting gear, and under the action of the sealing ring, the effect of effectively sealing and shielding the diameter of the inner wall of the air intake pipe is achieved, which plays a role in reducing the interference of dust on the measurement data;

[0023] The static evaporation rate measuring device for a low-temperature container is provided with a mounting plate. When the static evaporation rate of the low-temperature container is measured by the measuring device in daily use, in order to improve the fire safety protection effect of the measuring device in daily use, after the circuit box is installed, the mounting plate can be plugged into the top of the circuit box, and the first bolt is rotated through the limiting effect of the first nut, so that the first bolt slides into the inner wall of the card slot, so as to achieve the effect of convenient installation and use of the fire extinguisher, and play a role in effectively protecting the fire safety of the measuring device;

[0024] The static evaporation rate measuring device for a low-temperature container is provided with a clamping block. When a tiny flame appears when the measuring device is used for a long time, in order to improve the fire safety protection effect of the measuring device and the engagement and disassembly effect of the fire extinguisher, the second bolt can be rotated through the connection of the spring to drive the clamping block fixedly connected to the connecting rod to retract, so that there is no contact between the clamping block and the fire extinguisher, and the fire extinguisher can be quickly pulled out, so as to achieve the effect of quickly engaging and disassembling the fire extinguisher. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. As shown in the accompanying drawings, the above and other purposes, features and advantages of the present invention will be clearer. The same reference numerals in all the drawings indicate the same parts. The drawings are not deliberately scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the overall side view structure of the present invention;

[0028] Figure 3 It is a schematic diagram of the overall rear view structure of the present invention;

[0029] Figure 4 It is a schematic diagram of the exploded structure of the position distribution of the mounting plate and the test circuit box of the present invention;

[0030] Figure 5 It is a schematic diagram of the card slot position distribution structure of the present invention;

[0031] Figure 6 It is a schematic diagram of the connection structure between the clamping block and the fire extinguisher body of the present invention;

[0032] Figure 7It is a schematic diagram of the connection structure between the worm gear, the swing rod and the sliding rod;

[0033] Figure 8 It is a schematic diagram of the connection structure between the worm gear, the lifting rod and the pulling rod;

[0034] Fig. 9 It is a schematic diagram of the connection structure between the worm wheel, the connecting tooth plate and the connecting gear;

[0035] Fig.10 It is a schematic diagram of the connection structure between the connecting shaft and the adjusting plate.

[0036] Summary of the accompanying drawings: 1. test air circuit box; 2. air inlet pipe; 3. exhaust pipe; 4. test circuit box; 5. servo motor; 6. swing rod; 7. sliding rod; 8. limit slot; 9. lifting rod; 10. limit rod; 11. pulling rod; 12. connecting tooth plate; 13. telescopic rod; 14. connecting gear; 15. connecting shaft; 16. adjusting plate; 17. sealing ring; 18. protection mechanism; 1801. mounting plate; 1802. first nut; 1803. first bolt; 1804. slot; 1805. fixing block; 1806. fire extinguisher body; 1807. second nut; 1808. second bolt; 1809. connecting rod; 1810. connecting block; 1811. spring; 1812. clamping block. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0041] For examples, see Figures 1 to 10The present embodiment provides a static evaporation rate measuring device for a low-temperature container, comprising a test gas circuit box 1, the test gas circuit box 1 comprising an air inlet pipe 2, an exhaust pipe 3, a test circuit box 4 and a protective mechanism arranged on the outer wall of the test gas circuit box 1, the outer wall of the test gas circuit box 1 is extended with an air inlet pipe 2, the outer wall of the test gas circuit box 1 is extended with an exhaust pipe 3, and the top of the test gas circuit box 1 is detachably connected with the test circuit box 4;

[0042] The protection mechanism includes a sliding component, a lifting component and a rotating component;

[0043] The sliding assembly includes a servo motor 5, a swing rod 6, a sliding rod 7 and a limit groove 8. The back of the test gas circuit box 1 is fixedly connected with the servo motor 5, the output end of the servo motor 5 is fixedly connected with the swing rod 6 rotatably connected to the outer wall of the test gas circuit box 1, the outer wall of the swing rod 6 is slidably connected with the sliding rod 7, and the connection part of the outer wall of the swing rod 6 and the sliding rod 7 is provided with a limit groove 8;

[0044] The lifting assembly includes a lifting rod 9, a limiting rod 10 and a pulling rod 11. The outer wall of the sliding rod 7 is fixedly connected to the lifting rod 9 which is slidably connected to the outer wall of the test gas circuit box 1. The outer wall of the lifting rod 9 is slidably connected to the limiting rod 10 which is fixedly connected to the outer wall of the test gas circuit box 1. The outer wall of the lifting rod 9 is rotatably connected to the pulling rod 11.

[0045] The rotating assembly includes a connecting tooth plate 12, a telescopic rod 13, a connecting gear 14,

[0046] A connecting shaft 15, an adjusting plate 16 and a sealing ring 17, one end of the pulling rod 11 is rotatably connected to a connecting tooth plate 12 which is telescopically connected to the outer wall of the test air circuit box 1, the outer wall of the connecting tooth plate 12 is fixedly connected to a telescopic rod 13 which is fixedly connected to the outer wall of the test air circuit box 1, the outer wall of the connecting tooth plate 12 is meshed with a connecting gear 14 which is rotatably connected to the outer wall of the intake pipe 2, the rotation center of the connecting gear 14 is fixedly connected to the connecting shaft 15, one end of the connecting shaft 15 is fixedly connected to an adjusting plate 16 which is rotatably connected to the inner wall of the intake pipe 2, and the inner wall of the intake pipe 2 is provided with a sealing ring 17 located on one side of the adjusting plate 16.

[0047] Furthermore, a protection mechanism 18 is provided on the top of the test circuit box 4, which is beneficial for improving the fire safety protection of the measuring device during long-term use through the provision of the protection mechanism 18.

[0048] Furthermore, the test air circuit box 1 and the test circuit box 4 are detachably connected by bolts and nuts, and the sliding rod 7 forms a sliding structure between the servo motor 5 and the swing rod 6 and the limit groove 8. There are two groups of sliding rods 7 and limit grooves 8, and the positions of the two groups of sliding rods 7 and limit grooves 8 are equidistantly distributed about the rotation center of the swing rod 6, which is beneficial to the drive of the servo motor 5. Through the rotation of the swing rod 6, the sliding rod 7 is driven to slide along the inner wall of the limit groove 8, thereby driving the two groups of lifting rods 9 to slide relative to each other.

[0049] Furthermore, the lifting rod 9 forms a lifting structure through the sliding rod 7 and the limiting groove 8 and the limiting rod 10. There are two groups of lifting rods 9. The sliding directions of the two groups of lifting rods 9 are opposite, and the lifting rods 9 and the sliding rods 7 are arranged one by one, which is conducive to the sliding rod 7 sliding along the inner wall of the limiting groove 8, driving the lifting rod 9 to slide along the outer wall of the limiting rod 10, and playing a role in driving the pulling rod 11 to rotate conveniently.

[0050] Furthermore, the pulling rod 11 forms a rotating structure through the lifting rod 9 and the connecting tooth plate 12, and the connecting tooth plate 12 forms a telescopic structure through the pulling rod 11 and the telescopic rod 13, which is beneficial to the sliding of the lifting rod 9. Through the connection of the connecting tooth plate 12, the pulling rod 11 is driven to rotate, which plays a role in driving the connecting tooth plate 12 to conveniently telescope and move, which is beneficial to the rotation of the pulling rod 11. Through the connection of the telescopic rod 13, the connecting tooth plate 12 is driven to telescope and move, which plays a role in driving the connecting gear 14 to rotate conveniently.

[0051] Furthermore, the adjusting plate 16 forms a rotating structure with the intake pipe 2 through the connecting gear 14 and the connecting shaft 15. The rotation centers of the connecting gear 14, the connecting shaft 15 and the adjusting plate 16 are on the same horizontal plane. Two groups of sealing rings 17 are provided. The positions of the two groups of sealing rings 17 are symmetrically distributed about the central axis of the adjusting plate 16. The adjusting plate 16 is respectively arranged in a one-to-one correspondence with the intake pipe 2 and the exhaust pipe 3, which is conducive to the rotation of the connecting gear 14 through the connection of the connecting shaft 15, driving the adjusting plate 16 to flip along the inner wall of the intake pipe 2, thereby achieving the effect of effectively sealing and shielding the inner wall aperture of the intake pipe 2, thereby reducing the interference of dust on the measurement data.

[0052] Further, the protection mechanism 18 includes a mounting plate 1801, a first nut 1802, a first bolt 1803, a slot 1804, a fixing block 1805, a fire extinguisher body 1806, a second nut 1807, a second bolt 1808, a connecting rod 1809, a connecting block 1810, a spring 1811 and a clamping block 1812. The top of the test circuit box 4 is detachably connected to the mounting plate 1801, and the side wall of the mounting plate 1801 is provided with a first nut 1802, and the first The inner wall of the nut 1802 is threadedly connected with a first bolt 1803 which is slidably connected with the outer wall of the test circuit box 4. A slot 1804 is provided at the connection position between the outer wall of the test circuit box 4 and the first bolt 1803. A fixing block 1805 is fixedly connected to the top of the mounting plate 1801. A fire extinguisher body 1806 which fits the outer wall of the fixing block 1805 is placed on the top of the mounting plate 1801. A second nut 1807 is provided on the top of the mounting plate 1801. The second nut 180 The inner wall of the fire extinguisher body 1806 is threadedly connected with a second bolt 1808, one end of the second bolt 1808 is rotatably connected with a clamping block 1812 located on one side of the fire extinguisher body 1806, the outer wall of the clamping block 1812 is fixedly connected with a connecting rod 1809 slidably connected to the top of the mounting plate 1801, the end of the connecting rod 1809 is fixedly connected with a connecting block 1810, and the outer wall of the connecting block 1810 is fixedly connected with a spring 1811 fixedly connected to the top of the mounting plate 1801. By setting the clamping block 1812, it is beneficial to improve the fire safety protection effect of the measuring device and the clamping and disassembling effect of the fire extinguisher when a small flame appears after the measuring device is used for a long time. In order to improve the fire safety protection effect of the measuring device and the clamping and disassembling effect of the fire extinguisher, the second bolt 1808 can be rotated through the connection of the spring 1811 to drive the clamping block 1812 fixedly connected to the connecting rod 1809 to retract, so that the clamping block 1812 and the fire extinguisher are not in contact, and the fire extinguisher can be quickly pulled out, so as to achieve the effect of quick clamping and disassembling of the fire extinguisher.

[0053] Furthermore, the slot 1804 is arranged on the movement trajectory of the first bolt 1803, and the mounting plate 1801 forms a locking structure with the test circuit box 4 through the first bolt 1803 and the slot 1804. The first bolt 1803 and the slot 1804 are each provided with two groups, and the position distribution of the two groups of first bolts 1803 and the slot 1804 are symmetrical about the central axis of the mounting plate 1801, which is beneficial to the setting of the slot 1804 on the movement trajectory of the first bolt 1803, so as to achieve the effect of convenient locking and installation of the mounting plate 1801.

[0054] Furthermore, the clamping block 1812 forms a telescopic structure with the mounting plate 1801 through the second bolt 1808 and the connecting rod 1809. The outer wall contours of the contact parts between the clamping block 1812 and the fixing block 1805 and the fire extinguisher body 1806 are arc-shaped, and the contact parts between the clamping block 1812 and the fixing block 1805 and the fire extinguisher body 1806 are provided with anti-slip grooves, which are beneficial to the rotation of the second bolt 1808. Through the connection of the connecting rod 1809, the clamping block 1812 is driven to slide along the outer wall of the mounting plate 1801, so that there is no contact between the clamping block 1812 and the fire extinguisher, and the fire extinguisher can be quickly pulled out, so as to achieve the effect of quick engagement, disassembly and use of the fire extinguisher.

[0055] like Figure 1 As shown, the static evaporation rate measuring device for a low-temperature container, when in use, first, when the static evaporation rate of the low-temperature container is measured by the measuring device for daily use, in order to improve the synchronous shielding and protection effect of the inner walls of the air inlet pipe 2 and the exhaust pipe 3 when the measuring device needs to be moved, before the device is moved, the servo motor 5 can be turned on to drive the sliding rod 7 to slide along the inner wall of the limit groove 8 through the rotation of the swing rod 6, and the sliding of the sliding rod 7 drives the lifting rod 9 to perform a lifting movement along the outer wall of the limit rod 10. At the same time, the movement of the lifting rod 9 drives the connecting tooth plate 12 fixedly connected to the telescopic rod 13 to perform a telescopic movement through the rotation of the pulling rod 11, and the sliding of the connecting tooth plate 12 drives the adjustment plate 16 fixedly connected to the connecting shaft 15 to perform a flipping movement through the connection of the connecting gear 14, and under the action of the sealing ring 17, the inner wall diameter of the air inlet pipe 2 is effectively sealed and shielded, which plays a role in reducing the interference of dust on the measurement data;

[0056] Next, when the static evaporation rate of the low-temperature container is measured by the measuring device in daily use, in order to improve the fire safety protection effect of the measuring device in daily use, after the circuit box is installed, the mounting plate 1801 can be plugged into the top of the circuit box, and the first bolt 1803 can be rotated to slide into the inner wall of the card slot 1804 through the limiting effect of the first nut 1802, so as to achieve the effect of convenient installation and use of the fire extinguisher, and play a role in effective fire safety protection of the measuring device;

[0057] Finally, when a tiny flame appears after the measuring device is used for a long time, in order to improve the fire safety protection effect of the measuring device and the engagement, disassembly and use effect of the fire extinguisher, the second bolt 1808 can be rotated through the connection of the spring 1811 to drive the clamping block 1812 fixedly connected to the connecting rod 1809 to retract, so that there is no contact between the clamping block 1812 and the fire extinguisher, and the fire extinguisher can be quickly pulled out, so as to achieve the effect of quick engagement, disassembly and use of the fire extinguisher.

[0058] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A low-temperature container static evaporation rate measuring device, comprising a test gas circuit box (1), characterized in that: The test gas circuit box (1) comprises an air inlet pipe (2), an exhaust pipe (3), a test circuit box (4) and a protective mechanism arranged on the outer wall of the test gas circuit box (1); the air inlet pipe (2) is extended from the outer wall of the test gas circuit box (1); the exhaust pipe (3) is extended from the outer wall of the test gas circuit box (1); and the top of the test gas circuit box (1) is detachably connected to the test circuit box (4); The protection mechanism includes a sliding assembly, a lifting assembly and a rotating assembly; The sliding assembly comprises a servo motor (5), a swing rod (6), a sliding rod (7) and a limiting groove (8); the back of the test gas circuit box (1) is fixedly connected to the servo motor (5); the output end of the servo motor (5) is fixedly connected to the swing rod (6) rotatably connected to the outer wall of the test gas circuit box (1); the outer wall of the swing rod (6) is slidably connected to the sliding rod (7); and the limiting groove (8) is provided at the connection portion between the outer wall of the swing rod (6) and the sliding rod (7); The lifting assembly comprises a lifting rod (9), a limiting rod (10) and a pulling rod (11); the outer wall of the sliding rod (7) is fixedly connected to the lifting rod (9) which is slidably connected to the outer wall of the test gas circuit box (1); the outer wall of the lifting rod (9) is slidably connected to the limiting rod (10) which is fixedly connected to the outer wall of the test gas circuit box (1); and the outer wall of the lifting rod (9) is rotatably connected to the pulling rod (11); The rotating assembly comprises a connecting tooth plate (12), a telescopic rod (13), a connecting gear (14), a connecting shaft (15), an adjusting plate (16) and a sealing ring (17); one end of the pulling rod (11) is rotatably connected to a connecting tooth plate (12) telescopically connected to the outer wall of the test gas circuit box (1); the outer wall of the connecting tooth plate (12) is fixedly connected to the telescopic rod (13) fixedly connected to the outer wall of the test gas circuit box (1); the outer wall of the connecting tooth plate (12) is meshed with a connecting gear (14) rotatably connected to the outer wall of the intake pipe (2); the rotation center of the connecting gear (14) is fixedly connected to the connecting shaft (15); one end of the connecting shaft (15) is fixedly connected to an adjusting plate (16) rotatably connected to the inner wall of the intake pipe (2); and the inner wall of the intake pipe (2) is provided with a sealing ring (17) located on one side of the adjusting plate (16).

2. A low-temperature container static evaporation rate measuring device according to claim 1, characterized in that: A protection mechanism (18) is provided on the top of the test circuit box (4).

3. A static evaporation rate measuring device for a cryogenic container according to claim 1, characterized in that: The test gas circuit box (1) and the test circuit box (4) are detachably connected via bolts and nuts; the sliding rod (7) forms a sliding structure with the limit groove (8) via the servo motor (5) and the swing rod (6); two groups of the sliding rod (7) and the limit groove (8) are provided; the positions of the two groups of the sliding rod (7) and the limit groove (8) are equidistantly distributed about the rotation center of the swing rod (6).

4. A low-temperature container static evaporation rate measuring device according to claim 1, characterized in that: The lifting rod (9) forms a lifting structure through the sliding rod (7) and the limiting groove (8) and the limiting rod (10). Two groups of the lifting rod (9) are provided. The sliding directions of the two groups of the lifting rods (9) are opposite, and the lifting rods (9) and the sliding rods (7) are arranged in a one-to-one correspondence.

5. The static evaporation rate measuring device for a cryogenic container according to claim 1, characterized in that: The regulating plate (16) forms a rotating structure with the intake pipe (2) through the connecting gear (14) and the connecting shaft (15); the rotation centers of the connecting gear (14), the connecting shaft (15) and the regulating plate (16) are located on the same horizontal plane; two groups of sealing rings (17) are provided; the positions of the two groups of sealing rings (17) are symmetrically arranged with respect to the central axis of the regulating plate (16); and the regulating plate (16) is respectively arranged in a one-to-one correspondence with the intake pipe (2) and the exhaust pipe (3).

6. A low temperature container static evaporation rate measuring device according to claim 2, characterized in that: The protection mechanism (18) comprises a mounting plate (1801), a first nut (1802), a first bolt (1803), a slot (1804), a fixing block (1805), a fire extinguisher body (1806), a second nut (1807), a second bolt (1808), a connecting rod (1809), a connecting block (1810), a spring (1811) and a clamping block (1812); the top of the test circuit box (4) is detachably connected to the mounting plate (1801); the side wall of the mounting plate (1801) is provided with a first nut (1802); the inner wall of the first nut (1802) is threadedly connected to the first bolt (1803) which is slidably connected to the outer wall of the test circuit box (4); a slot (1804) is provided at the connection portion between the outer wall of the test circuit box (4) and the first bolt (1803); the mounting plate (1801) is detachably connected to the top of the test circuit box (4); the side wall of the mounting plate (1801) is provided with a first nut (1802); the inner wall of the first nut (1802) is threadedly connected to the first bolt (1803) which is slidably connected to the outer wall of the test circuit box (4); the outer wall of the test circuit box (4) and the first bolt (1803) are connected to the fixing block (1804); 801), a fixing block (1805) is fixedly connected to the top of the mounting plate (1801), a fire extinguisher body (1806) that fits the outer wall of the fixing block (1805) is placed on the top of the mounting plate (1801), a second nut (1807) is arranged on the top of the mounting plate (1801), a second bolt (1808) is threadedly connected to the inner wall of the second nut (1807), one end of the second bolt (1808) is rotatably connected to a clamping block (1812) located on one side of the fire extinguisher body (1806), the outer wall of the clamping block (1812) is fixedly connected to a connecting rod (1809) that is slidably connected to the top of the mounting plate (1801), the end of the connecting rod (1809) is fixedly connected to a connecting block (1810), and the outer wall of the connecting block (1810) is fixedly connected to a spring (1811) that is fixedly connected to the top of the mounting plate (1801).

7. A low-temperature container static evaporation rate measuring device according to claim 6, characterized in that: The clamping groove (1804) is arranged on the movement track of the first bolt (1803); the mounting plate (1801) forms a clamping structure with the test circuit box (4) through the first bolt (1803) and the clamping groove (1804); two groups of the first bolt (1803) and the clamping groove (1804) are arranged; and the position distribution of the two groups of the first bolt (1803) and the clamping groove (1804) are symmetrical about the central axis of the mounting plate (1801).

8. The static evaporation rate measuring device for a cryogenic container according to claim 6, characterized in that: The clamping block (1812) forms a telescopic structure with the mounting plate (1801) through the second bolt (1808) and the connecting rod (1809); the outer wall contours of the contact parts between the clamping block (1812) and the fixing block (1805) and the fire extinguisher body (1806) are all arc-shaped; and the contact parts between the clamping block (1812) and the fixing block (1805) and the fire extinguisher body (1806) are all provided with anti-slip grooves.

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