Miniature high temperature and pressure resistant flexible multi-point thermocouple

Abstract

The present invention relates to the field of thermocouple technology, and specifically to a miniature high-temperature and pressure-resistant flexible multi-point thermocouple, comprising a junction box and a plurality of armored thermocouples, and also comprising a microcontroller, an upper connecting tube, a lower connecting tube, a flange, a buffer mechanism and a pressure relief mechanism, wherein the buffer mechanism comprises a sliding component, a buffer component and a plurality of flexible protective tubes, and the pressure relief mechanism is arranged on the outer wall of the upper connecting tube, the pressure relief mechanism comprises a pressure relief tube, a pushing component and a lifting component, the pressure relief tube is fixedly arranged on the outer wall of the lower connecting tube, the lifting component is inserted on the pressure relief tube, and the pushing component is arranged between the sliding component and the lifting component. The miniature high-temperature and pressure-resistant flexible multi-point thermocouple of the present invention can effectively prevent the plurality of flexible protective tubes from being damaged due to pressure, ensure the long-term wrapping protection of the plurality of armored thermocouples by the plurality of flexible protective tubes, prevent the thermocouples from being corroded due to long-term contact with the medium due to being exposed, etc., thereby greatly improving the pressure resistance effect of the thermocouple.

Description

Technical Field

[0001] The invention relates to the technical field of thermocouples, and in particular to a miniature high-temperature and pressure-resistant flexible multi-point thermocouple. Background Art

[0002] Thermocouple is a commonly used temperature measuring element in temperature measuring instruments. It directly measures temperature and converts temperature signals into thermoelectric potential signals, which are then converted into the temperature of the measured medium through electrical instruments (secondary instruments). The appearance of various thermocouples is often very different due to needs, but their basic structure is roughly the same. They are usually composed of main parts such as hot electrodes, insulating sleeve protection tubes and junction boxes, and are usually used in conjunction with display instruments, recording instruments and electronic regulators.

[0003] Multi-point thermocouples are suitable for production sites where the temperature gradient is not significant and multiple locations need to be measured simultaneously or multiple measurements of a single location are required. Multi-point thermocouples are widely used in large fertilizer synthesis towers, storage tanks and other devices.

[0004] The structure of the existing multi-point thermocouple has the following shortcomings:

[0005] 1. The existing multi-point thermocouples are not designed with a protective tube on the outside. The thermocouples are easily affected by the lateral pressure in the container. At the same time, when subjected to the longitudinal pressure in the container, the protective tube wrapped around the outer periphery of the thermocouple cannot be moved for buffering. After the thermocouple is damaged, it is exposed and corroded by the medium inside the container for a long time, and its service life is greatly reduced.

[0006] 2. During the inspection of various processes, when the medium temperature is high, the internal air pressure of the container containing the medium increases, and the heat transferred from the working end of the thermocouple continuously heats the air in the lower connecting tube of the thermocouple, which can easily cause high pressure to form inside the lower connecting tube. If it is not released in time, it is easy to damage the lower connecting tube and affect the measurement effect of the thermocouple. Summary of the invention

[0007] The purpose of the present invention is to provide a miniature high-temperature and pressure-resistant flexible multi-point thermocouple.

[0008] To achieve this object, the present invention adopts the following technical solutions:

[0009] Provide a miniature high-temperature and pressure-resistant flexible multi-point thermocouple, including a junction box and a plurality of armored thermocouples, the lengths of the plurality of armored thermocouples are inconsistent, a wiring terminal is fixedly arranged inside the junction box through a mounting plate, the plurality of armored thermocouples are fixed on the wiring terminal through threading bolts, and a protective plate is arranged on the outer wall of the junction box;

[0010] It also includes a microcontroller, an upper connecting pipe, a lower connecting pipe, a flange, a buffer mechanism and a pressure release mechanism;

[0011] The upper connecting pipe is fixedly arranged at the bottom of the junction box, the lower connecting pipe is fixedly arranged at the bottom end of the upper connecting pipe, and the flange is fixedly arranged at the bottom end of the lower connecting pipe;

[0012] The buffer mechanism is arranged on the flange, and the buffer mechanism includes a sliding assembly, a buffer assembly and a plurality of flexible protection tubes. The bottom center of the flange is integrally formed with a boss, the sliding assembly is arranged on the inner wall of the lower half of the flange, the buffer assembly is arranged on the inner wall of the upper half of the flange, and a plurality of flexible protection tubes are arranged on the sliding assembly. The working end of each armored thermocouple passes through the flexible protection tube.

[0013] The pressure relief mechanism is arranged on the outer wall of the upper connecting tube, and the pressure relief mechanism includes a pressure relief tube, a pushing assembly and a lifting assembly. The pressure relief tube is fixed on the outer wall of the lower connecting tube, the lifting assembly is inserted on the pressure relief tube, and the pushing assembly is arranged between the sliding assembly and the lifting assembly.

[0014] Furthermore, the sliding assembly includes a plurality of insulating sleeves and a plurality of connecting blocks. A plurality of sliding holes are evenly spaced at one end of the flange close to the boss. Each insulating sleeve is slidably arranged inside a sliding hole. Each connecting block is fixed between two adjacent insulating sleeves. An avoidance groove for sliding of the plurality of connecting blocks is provided on the inner wall of the flange.

[0015] Furthermore, the buffer assembly includes a plurality of buffer springs, each buffer spring is inserted into a sliding hole, each armored thermocouple is plugged into an insulating sliding sleeve, and the inner wall of each sliding hole and the top outer wall of each insulating sliding sleeve respectively abut against both ends of a buffer spring.

[0016] Furthermore, the top end of each flexible protective tube is fixedly connected to the inner wall of an insulating sleeve.

[0017] Furthermore, the pushing assembly includes a slide plate, a push rod and a guide rod. The slide plate is fixed on the outer wall of one of the insulating sleeves. A slide groove is provided on the inner wall of the flange. The slide plate is slidably connected to the slide groove. The guide rod is fixed on the inner wall of the flange. The guide rod is plugged into the slide plate. The push rod is fixed at the top end of the slide plate away from the insulating sleeve. The push rod is plugged into the flange. A limit plate is fixed on the top of the flange. The top of the push rod is plugged into the limit plate.

[0018] Furthermore, the lifting assembly includes a lifting plate, an end cover and a sealing plug. The lifting plate is fixed at the top of the push rod, the end cover is fixed at the bottom end of the lifting plate away from the push rod, the sealing plug is fixed at the bottom of the end cover, the sealing plug is plugged into the top of the pressure relief tube, and a plurality of exhaust holes are evenly spaced outside the top of the pressure relief tube.

[0019] Furthermore, a high temperature resistant accordion protective cover is fixedly provided on one end of the slide plate near the top of the insulating sleeve, and a storage groove is provided through the top of the slide groove, and the storage groove is fixedly connected to the top of the high temperature resistant accordion protective cover.

[0020] Furthermore, the interior of the upper connecting pipe is filled with sealing slurry, and a plurality of armored thermocouples pass through the sealing slurry.

[0021] Furthermore, a cover shell is fixedly provided on the outer wall of one end of the pressure relief pipe close to the exhaust hole, an air suction cylinder is fixedly provided on the top of the flange, a motor is fixedly provided inside the air suction cylinder, a fan is fixedly provided on the output end thereof, an extraction pipe is fixedly provided between one end of the air suction cylinder and the cover shell, a connecting pipe is fixedly provided on the other end of the air suction cylinder, a storage box is fixedly provided on the top of the flange, the connecting pipe is fixedly connected to one end of the storage box, an annular pipe is fixedly provided on the outer surface of the upper connecting pipe, a delivery pipe is fixedly provided between the annular pipe and the other end of the storage box, a plurality of air intake pipes are fixedly provided between the annular pipe and the upper connecting pipe, an injection port is provided on the top of the storage box, a sealing cover is inserted inside the injection port, a position sensor is fixedly provided on the top of the limit plate, and its output end faces the lifting plate, and the motor and the position sensor are electrically connected to the microcontroller.

[0022] Furthermore, an isolation tube is fixedly provided at each end of the upper connecting tube and one end of the sealing slurry, and a plurality of through holes are evenly spaced on the outer wall of the sealing slurry in the circumferential direction.

[0023] Beneficial effects of the present invention:

[0024] 1. The present invention designs a buffer mechanism, namely a sliding assembly, a buffer assembly and a plurality of flexible protective tubes, so that a plurality of armored thermocouples can be protected by the plurality of flexible protective tubes. The outer circumferential walls of the plurality of flexible protective tubes can withstand the lateral pressure in the container, and prevent the lateral pressure from directly acting on the working end of the thermocouple, thereby achieving a layer of pressure resistance effect. At the same time, the sliding assembly and the buffer assembly can slide and buffer when the plurality of flexible protective tubes are subjected to the longitudinal pressure in the container, so as to reduce the longitudinal pressure on the plurality of flexible protective tubes, and achieve another layer of pressure resistance effect. The two cooperate with each other, and can effectively prevent the plurality of flexible protective tubes from being damaged due to pressure, ensure the long-term wrapping protection of the plurality of armored thermocouples by the plurality of flexible protective tubes, and prevent the thermocouples from being corroded due to long-term contact with the medium due to being exposed, etc., thereby greatly improving the pressure resistance effect of the thermocouple.

[0025] 2. The present invention designs a pressure relief mechanism, namely a pressure relief tube, a pushing assembly and a lifting assembly. While several flexible protective tubes slide up for buffering, the present invention simultaneously drives the sealing plug to rise vertically inside the pressure relief tube. In the initial state, the sealing plug blocks all the exhaust holes. As the sealing plug rises vertically, the exhaust holes gradually open, thereby releasing the high-temperature gas in the lower connecting tube, preventing continuous accumulation of high pressure in the lower connecting tube from causing damage and affecting the measurement effect of the thermocouple. Since the insulating sleeve is designed to be linked with the lifting assembly through the pushing assembly, the vertical rising stroke of the insulating sleeve is greater when the temperature of the medium inside the container is higher, and the synchronous rising stroke of the sealing plug is increased, so that the number of opened exhaust holes is increased, and then the release amount of the high-temperature gas in the lower connecting tube is synchronously increased, thereby achieving an adaptively adjusted pressure relief effect, and significantly improving the pressure resistance effect of the thermocouple.

[0026] 3. The present invention realizes the linkage operation of the buffer mechanism and the pressure release mechanism by designing a pushing component, and uses the vertical sliding of a plurality of flexible protection tubes when subjected to longitudinal pressure as the driving force for the sealing plug. The high pressure in the lower connecting tube can be released without the aid of any electricity, thereby saving the pressure release cost.

[0027] 4. By designing the second embodiment, the present invention can synchronously start the motor when the position sensor detects that the lifting plate drives the sealing plug to rise, that is, release the pressure, thereby starting the fan on the output end of the starter, and converting the extracted high-temperature gas into low-temperature gas after combining with the refrigerant and injecting it into the annular chamber between the two isolation tubes and the upper connecting tube through four air inlet pipes. Under the action of a number of through holes, the low-temperature gas is transported to the entire upper, middle and lower positions of the sealing slurry to cool it down, thereby preventing it from being cracked due to the high temperature and high pressure in the lower connecting tube, and preventing it from affecting the insulation effect of a number of armored thermocouples, thereby ensuring the temperature measurement accuracy of a number of armored thermocouples and improving the temperature measurement effect.

[0028] 5. The present invention designs a number of armored thermocouples, which have the advantages of being bendable, flexible, resistant to high pressure, having a short thermal response time, and being strong and durable. At the same time, the lengths of the armored thermocouples are designed to be inconsistent, which can meet the measurement of multiple positions or multiple measurements of a single position, thereby realizing multi-point temperature measurement and improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings in the embodiment of the present invention are briefly introduced below.

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0031] Figure 2 for Figure 1 A in the enlarged view;

[0032] Figure 3 A top view of the present invention;

[0033] Figure 4 for Figure 3 Plane section view at the midline BB;

[0034] Figure 5 for Figure 4 The enlarged view of point C in the figure;

[0035] Figure 6 for Figure 4 The enlarged view of point D in the figure;

[0036] Figure 7 is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention;

[0037] Figure 8 for Figure 7 E in the enlarged view;

[0038] Fig. 9 for Figure 7 F in the enlarged view;

[0039] Fig.10 It is a plan cross-sectional view of a second embodiment of the invention;

[0040] In the figure:

[0041] Junction box 1,

[0042] Terminal block 10,

[0043] Armored thermocouple 2,

[0044] Upper connecting pipe 3, sealing slurry 30,

[0045] Lower connecting pipe 4,

[0046] Flange 5,

[0047] Boss 50, sliding hole 500, avoidance groove 501, limiting plate 502,

[0048] Buffer mechanism 6,

[0049] Sliding assembly 60, insulating sleeve 600, connecting block 601,

[0050] Buffer assembly 61, buffer spring 610,

[0051] Flexible protective tube 62,

[0052] Pressure relief mechanism 7,

[0053] Pressure relief tube 70, exhaust hole 700,

[0054] Pushing assembly 71, slide plate 710, push rod 711, guide rod 712, high temperature resistant organ protective cover 713,

[0055] Lifting assembly 72, lifting plate 720, end cover 721, sealing plug 722,

[0056] Cover shell 8, suction cylinder 80, motor 81, fan 82, extraction pipe 83, connecting pipe 84, storage box 85, annular pipe 86, delivery pipe 87, air inlet pipe 88, sealing cover 89, position sensor 890, isolation pipe 891, through hole 892. DETAILED DESCRIPTION

[0057] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0058] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product.

[0059] Embodiment 1: The present invention provides a technical solution, referring to Figures 1 to 6 As shown, a miniature high-temperature and pressure-resistant flexible multi-point thermocouple includes a junction box 1 and a plurality of armored thermocouples 2. The armored thermocouple has the advantages of being bendable, resistant to high pressure, having a short thermal response time, and being strong and durable. The lengths of the plurality of armored thermocouples 2 are inconsistent. Since the temperatures at various positions inside the container are different, the lengths of the plurality of armored thermocouples 2 are designed to be inconsistent, which can meet the measurement of multiple positions or multiple measurements at a single position, realize multi-point temperature measurement, and thus improve the detection efficiency. A wiring terminal 10 is fixedly provided inside the junction box 1 through a mounting plate, and the plurality of armored thermocouples 2 are fixedly provided on the wiring terminal 10 through threading bolts. A protective plate is provided on the outer wall of the junction box 1.

[0060] It also includes a microcontroller, an upper connecting pipe 3, a lower connecting pipe 4, a flange 5, a buffer mechanism 6 and a pressure release mechanism 7;

[0061] The upper connecting pipe 3 is fixedly arranged at the bottom of the junction box 1, the lower connecting pipe 4 is fixedly arranged at the bottom end of the upper connecting pipe 3, and the flange 5 is fixedly arranged at the bottom end of the lower connecting pipe 4;

[0062] The buffer mechanism 6 is arranged on the flange 5, and the buffer mechanism 6 includes a sliding assembly 60, a buffer assembly 61 and a plurality of flexible protection tubes 62. The bottom center of the flange 5 is integrally formed with a boss 50. The sliding assembly 60 is arranged on the inner wall of the lower half of the flange 5, and the buffer assembly 61 is arranged on the inner wall of the upper half of the flange 5. A plurality of flexible protection tubes 62 are arranged on the sliding assembly 60, and the working end of each armored thermocouple 2 passes through the flexible protection tube 62.

[0063] The pressure relief mechanism 7 is arranged on the outer wall of the upper connecting tube 3, and the pressure relief mechanism 7 includes a pressure relief tube 70, a pushing assembly 71 and a lifting assembly 72. The pressure relief tube 70 is fixed on the outer wall of the lower connecting tube 4, the lifting assembly 72 is inserted on the pressure relief tube 70, and the pushing assembly 71 is arranged between the sliding assembly 60 and the lifting assembly 72.

[0064] Reference Figures 1 to 6 As shown, the sliding assembly 60 includes a plurality of insulating sleeves 600 and a plurality of connecting blocks 601. A plurality of sliding holes 500 are arranged at equal intervals at one end of the flange 5 close to the boss 50. Each insulating sleeve 600 is slidably arranged inside a sliding hole 500. Each connecting block 601 is fixedly arranged between two adjacent insulating sleeves 600. An avoidance groove 501 for sliding of the plurality of connecting blocks 601 is arranged on the inner wall of the flange 5. When the temperature of the medium is high during the detection of various processes, the gas pressure in the container containing the medium increases. Considering that the installation angles of the thermocouple include vertical installation and horizontal installation, this pressure The force includes lateral pressure and longitudinal pressure. The outer circumferential wall of the plurality of flexible protective tubes 62 can withstand the lateral pressure in the container and prevent the lateral pressure from directly acting on the working end of the thermocouple, thereby achieving a pressure-resistant effect. When the plurality of flexible protective tubes 62 are subjected to the longitudinal pressure in the container, since the top end of each flexible protective tube 62 is fixedly connected to the inner wall of an insulating sleeve 600, each insulating sleeve 600 is slidably connected to a sliding hole 500, and the plurality of insulating sleeves 600 are fixedly connected through a plurality of connecting blocks 601, the plurality of insulating sleeves 600 are driven to slide vertically upward inside the plurality of sliding holes 500.

[0065] Reference Figures 1 to 6 As shown, the buffer assembly 61 includes a plurality of buffer springs 610, each buffer spring 610 is inserted into a sliding hole 500, each armored thermocouple 2 is plugged into an insulating sleeve 600, the inner wall of each sliding hole 500 and the top outer wall of each insulating sleeve 600 respectively abut against two ends of a buffer spring 610, when the plurality of insulating sleeves 600 vertically slide upward in the plurality of sliding holes 500, since each buffer spring 610 is plugged into a sliding hole 500, each armored thermocouple 2 is plugged into an insulating sleeve 600, the inner wall of each sliding hole 500 and the top outer wall of each insulating sleeve 600 respectively abut against two ends of a buffer spring 610, thereby causing the plurality of buffer springs 610 to change from an initial state to a contracted state, thereby performing buffering, so as to reduce the longitudinal pressure exerted on the plurality of flexible protective tubes 62.

[0066] Reference Figures 1 to 6As shown, the top end of each flexible protective tube 62 is fixedly connected to the inner wall of an insulating sleeve 600. Since the top end of each flexible protective tube 62 is fixedly connected to the inner wall of an insulating sleeve 600, when the flexible protective tube 62 is subjected to the longitudinal pressure inside the container, it will drive the insulating sleeve 600 to slide up inside the sliding hole 500.

[0067] Reference Figures 1 to 6 As shown, the push assembly 71 includes a slide plate 710, a push rod 711 and a guide rod 712. The slide plate 710 is fixedly arranged on the outer wall of one of the insulating sleeves 600. A slide groove is arranged on the inner wall of the flange 5. The slide plate 710 is slidably connected with the slide groove. The guide rod 712 is fixedly arranged on the inner wall of the flange 5. The guide rod 712 is plugged with the slide plate 710. The push rod 711 is fixedly arranged at one end of the top of the slide plate 710 away from the insulating sleeve 600. The push rod 711 is plugged with the flange 5. A limit plate 502 is fixedly arranged on the top of the flange 5. The push rod The top of 711 is plugged into the limit plate 502. When several insulating sleeves 600 slide vertically upward inside several sliding holes 500, since the slide plate 710 is fixedly connected to the outer wall of one of the insulating sleeves 600, the slide plate 710 is slidably connected to the slide groove, the guide rod 712 is plugged into the slide plate 710, the push rod 711 is fixedly connected to the top end of the slide plate 710 away from the insulating sleeve 600, and the push rod 711 is plugged into the flange 5. Under the limiting action of the limit plate 502, the push rod 711 is driven to rise vertically.

[0068] Reference Figures 1 to 6As shown, the lifting assembly 72 includes a lifting plate 720, an end cover 721 and a sealing plug 722. The lifting plate 720 is fixedly arranged on the top of the push rod 711, the end cover 721 is fixedly arranged on the bottom end of the lifting plate 720 away from the push rod 711, and the sealing plug 722 is fixedly arranged on the bottom of the end cover 721. The sealing plug 722 is plugged into the top of the pressure relief tube 70, and a plurality of exhaust holes 700 are evenly spaced outside the top of the pressure relief tube 70. When the push rod 711 rises vertically, since the end of the push rod 711 away from the slide plate 710 is fixedly connected to one end of the lifting plate 720, the other end of the lifting plate is fixedly connected to the sealing plug 722 through the end cover 721, and the sealing plug 722 is plugged into the pressure relief tube 70, thereby driving the sealing plug 722 to rise vertically inside the pressure relief tube 70. In the initial state, the sealing plug 722 blocks all the exhaust holes 700. As the sealing plug 722 is As the plug 722 rises vertically, the exhaust hole 700 gradually opens, thereby releasing the high-temperature gas in the lower connecting pipe 4. It should be noted that the high-temperature gas in the lower connecting pipe 4 is mainly formed by the heat transmitted from the working end when the armored thermocouple 2 detects the temperature of the medium inside the container to heat the air in the lower connecting pipe 4, causing it to heat up and form high-temperature gas. As the heating continues, the lower connecting pipe 4 is prone to form high pressure. Since the insulating sleeve 600 is designed to be linked with the lifting assembly 72 through the pushing assembly 71, the higher the temperature of the medium inside the container, the greater the vertical rising stroke of the insulating sleeve 600, and the synchronous rising stroke of the sealing plug 722 increases, which increases the number of opened exhaust holes 700, thereby synchronously increasing the release amount of the high-temperature gas in the lower connecting pipe 4, thereby achieving an adaptively adjusted pressure release effect, which significantly improves the pressure resistance of the thermocouple.

[0069] Reference Figures 1 to 6 As shown, a high-temperature resistant accordion protective cover 713 is fixedly provided at one end of the top of the slide plate 710 near the insulating sleeve 600, and a receiving groove is provided through the top of the slide groove, and the receiving groove is fixedly connected to the top of the high-temperature resistant accordion protective cover 713. The high-temperature resistant accordion protective cover 713 separates the slide groove from the slide hole 500, thereby preventing high-temperature gas from entering the interior of the slide groove, ensuring the pushing effect of the slide plate 710 and not affecting the pressure release operation.

[0070] Reference Figures 1 to 6 As shown, the interior of the upper connecting tube 3 is filled with sealing slurry 30, and several armored thermocouples 2 pass through the sealing slurry 30. The sealing slurry 30 is used to realize the fixed connection between the armored thermocouple 2 and the upper connecting tube 3, so as to achieve the effect of fixed installation and insulation.

[0071] Working principle: During the detection of various process steps, when the medium temperature is high, the air pressure in the container containing the medium increases. Considering that the installation angles of the thermocouple include vertical installation and horizontal installation, this pressure includes lateral pressure and longitudinal pressure. The outer circumferential wall of a plurality of flexible protective tubes 62 can withstand the lateral pressure in the container and prevent the lateral pressure from directly acting on the working end of the thermocouple, thereby achieving a pressure-resistant effect. When a plurality of flexible protective tubes 62 are subjected to the longitudinal pressure in the container, since the top end of each flexible protective tube 62 is fixedly connected to the inner wall of an insulating sleeve 600, each insulating sleeve 600 is slidably connected to a sliding hole 500, and a plurality of insulating sleeves 600 are fixedly connected through a plurality of connecting blocks 601, a plurality of insulating sleeves 600 are driven to slide vertically upward inside a plurality of sliding holes 500.

[0072] When a plurality of insulating sleeves 600 slide vertically upward inside a plurality of sliding holes 500, since each buffer spring 610 is plugged into a sliding hole 500, each armored thermocouple 2 is plugged into an insulating sleeve 600, the inner wall of each sliding hole 500 and the outer wall at the top end of each insulating sleeve 600 respectively contact the two ends of a buffer spring 610, so that the plurality of buffer springs 610 are transformed from an initial state to a contracted state for buffering, so as to reduce the longitudinal pressure on the plurality of flexible protective tubes 62.

[0073] While several insulating sleeves 600 slide vertically upward inside several sliding holes 500, since the slide plate 710 is fixedly connected to the outer wall of one of the insulating sleeves 600, the slide plate 710 is slidably connected to the slide groove, the guide rod 712 is plugged into the slide plate 710, the push rod 711 is fixedly connected to the top end of the slide plate 710 away from the insulating sleeve 600, and the push rod 711 is plugged into the flange 5, and under the limiting action of the limit plate 502, the push rod 711 is driven to rise vertically.

[0074] When the push rod 711 rises vertically, since the end of the push rod 711 away from the slide plate 710 is fixedly connected to one end of the lifting plate 720, the other end of the upgrading plate is fixedly connected to the sealing plug 722 through the end cover 721. In addition, the sealing plug 722 is plugged into the pressure relief pipe 70, thereby driving the sealing plug 722 to rise vertically inside the pressure relief pipe 70. In the initial state, the sealing plug 722 blocks all the exhaust holes 700. As the sealing plug 722 rises vertically, the exhaust holes 700 are gradually opened, thereby releasing the high-temperature gas in the lower connecting pipe 4. It should be noted that the high-temperature gas in the lower connecting pipe 4 is mainly detected by the armored thermocouple 2. When the temperature of the medium inside the container is high, the heat transferred from the working end heats the air in the lower connecting pipe 4, causing it to heat up to form high-temperature gas. As the heating continues, the lower connecting pipe 4 is prone to form high pressure. Since the insulating sleeve 600 is linked with the lifting assembly 72 through the pushing assembly 71, the vertical rising stroke of the insulating sleeve 600 is greater when the temperature of the medium inside the container is higher, and the synchronous rising stroke of the sealing plug 722 increases, so that the number of opened exhaust holes 700 increases, and then the release amount of high-temperature gas in the lower connecting pipe 4 is synchronously increased, thereby achieving an adaptively adjusted pressure release effect, which significantly improves the pressure resistance effect of the thermocouple.

[0075] The high temperature resistant accordion protective cover 713 separates the slide groove from the slide hole 500, thereby preventing high temperature gas from entering the interior of the slide groove, ensuring the pushing effect of the slide plate 710 without affecting the pressure release operation.

[0076] The sealing slurry 30 is used to realize the fixed connection between the armored thermocouple 2 and the upper connecting pipe 3, so as to achieve the effects of fixed installation and insulation.

[0077] Embodiment 2: In order to ensure the measurement accuracy and effect of the multi-point thermocouple, the present invention provides another technical solution;

[0078] Reference Figures 7 to 10As shown, a cover shell 8 is fixedly arranged on the outer wall of one end of the pressure relief pipe 70 close to the exhaust hole 700, an air suction cylinder 80 is fixedly arranged on the top of the flange 5, a motor 81 is fixedly arranged inside the air suction cylinder 80, a fan 82 is fixedly arranged on the output end thereof, an extraction pipe 83 is fixedly arranged between one end of the air suction cylinder 80 and the cover shell 8, a connecting pipe 84 is fixedly arranged on the other end of the air suction cylinder 80, a storage box 85 is fixedly arranged on the top of the flange 5, the connecting pipe 84 is fixedly connected to one end of the storage box 85, an annular pipe 86 is fixedly arranged on the outer surface of the upper connecting pipe 3, a delivery pipe 87 is fixedly arranged between the annular pipe 86 and the other end of the storage box 85, a plurality of air intake pipes 88 are fixedly arranged between the annular pipe 86 and the upper connecting pipe 3, an injection port is arranged on the top of the storage box 85, a sealing cover 89 is inserted inside the injection port, a position sensor 890 is fixedly arranged on the top of the limit plate 502, and its output end faces the lifting plate 720, the motor 81 and the position sensor 890 are fixedly arranged on the top of the limit plate 502, The sensors 890 are all electrically connected to the microcontroller. Affected by the high temperature and high pressure in the lower connecting pipe 4, the sealing slurry 30 may crack, which will affect the insulation effect of the armored thermocouple 2 and reduce the temperature measurement accuracy. In order to prevent this situation, the above structure is designed. When the lifting plate 720 drives the sealing plug 722 to rise, the position sensor 890 detects the signal of the lifting plate 720 rising and sends it to the controller, so that the motor 81 is started by the controller, thereby driving the fan 82 to rotate, and the high-temperature gas discharged from the exhaust hole 700 to the cover 8 is drawn into the interior of the suction cylinder 80 through the extraction pipe 83, and then transported to the interior of the storage box 85 by the connecting pipe 84. Refrigerant is pre-stored in the storage box 85. The refrigerant absorbs the heat in the high-temperature gas and converts it into low-temperature air. The injection port is convenient for timely addition of refrigerant in the storage box 85 after it is exhausted, and the sealing cover 89 plays a sealing role.

[0079] Reference Figures 7 to 10 As shown, an isolation tube 891 is fixedly provided at each end of the upper connecting tube 3 and one end of the sealing slurry 30, and a plurality of through holes 892 are evenly spaced on the outer wall in the circumferential direction of the sealing slurry 30. The converted low-temperature gas is transported to the interior of the annular tube 86 through the delivery pipe 87, and then transported to the annular chamber between the isolation tube 891 and the upper connecting tube 3 by the plurality of air inlet pipes 88. Under the action of the plurality of through holes 892, the low-temperature gas is transported to the entire upper, middle and lower positions of the sealing slurry 30 to cool it down, thereby preventing it from being cracked due to the high temperature and high pressure in the lower connecting tube 4, and preventing it from affecting the insulation effect of the plurality of armored thermocouples 2, thereby ensuring the temperature measurement accuracy of the plurality of armored thermocouples 2 and improving the temperature measurement effect.

Claims

1. A miniature high-temperature and pressure-resistant flexible multi-point thermocouple, comprising a junction box (1) and a plurality of armored thermocouples (2), wherein the lengths of the plurality of armored thermocouples (2) are inconsistent, a junction box (1) is provided with a wiring terminal (10) fixedly provided inside via a mounting plate, the plurality of armored thermocouples (2) are all fixedly provided on the wiring terminal (10) via threading bolts, and a protective plate is provided on the outer wall of the junction box (1), characterized in that: It also includes a microcontroller, an upper connecting pipe (3), a lower connecting pipe (4), a flange (5), a buffer mechanism (6) and a pressure release mechanism (7); The upper connecting pipe (3) is fixedly arranged at the bottom of the junction box (1), the lower connecting pipe (4) is fixedly arranged at the bottom end of the upper connecting pipe (3), and the flange (5) is fixedly arranged at the bottom end of the lower connecting pipe (4); The buffer mechanism (6) is arranged on the flange (5), and the buffer mechanism (6) comprises a sliding assembly (60), a buffer assembly (61) and a plurality of flexible protective tubes (62). A boss (50) is integrally formed at the bottom center of the flange (5), and the boss (50) is mainly used to facilitate the thermocouple to be installed on the installation port of the container through the flange (5). The sliding assembly (60) is arranged on the inner wall of the lower half of the flange (5), and the buffer assembly (61) is arranged on the inner wall of the upper half of the flange (5). The plurality of flexible protective tubes (62) are arranged on the sliding assembly (60), and the working end of each armored thermocouple (2) passes through the flexible protective tube (62). The pressure relief mechanism (7) is arranged on the outer wall of the upper connecting tube (3), and comprises a pressure relief tube (70), a pushing assembly (71) and a lifting assembly (72). The pressure relief tube (70) is fixedly arranged on the outer wall of the lower connecting tube (4), the lifting assembly (72) is inserted into the pressure relief tube (70), and the pushing assembly (71) is arranged between the sliding assembly (60) and the lifting assembly (72).

2. The miniature high temperature and pressure resistant flexible multi-point thermocouple according to claim 1, characterized in that: The sliding assembly (60) comprises a plurality of insulating sliding sleeves (600) and a plurality of connecting blocks (601); a plurality of sliding holes (500) are arranged at equal intervals on one end of the flange (5) close to the boss (50); each insulating sliding sleeve (600) is slidably arranged inside a sliding hole (500); each connecting block (601) is fixedly arranged between two adjacent insulating sliding sleeves (600); and an avoidance groove (501) for sliding the plurality of connecting blocks (601) is arranged on the inner wall of the flange (5).

3. The miniature high temperature and pressure resistant flexible multi-point thermocouple according to claim 2 is characterized in that: The buffer assembly (61) comprises a plurality of buffer springs (610), each buffer spring (610) is inserted into a sliding hole (500), each armored thermocouple (2) is plugged into an insulating sliding sleeve (600), and the inner wall of each sliding hole (500) and the outer wall at the top end of each insulating sliding sleeve (600) respectively abut against two ends of a buffer spring (610).

4. The miniature high temperature and pressure resistant flexible multi-point thermocouple according to claim 3 is characterized in that: The top end of each flexible protection tube (62) is fixedly connected to the inner wall of an insulating sliding sleeve (600).

5. The miniature high temperature and pressure resistant flexible multi-point thermocouple according to claim 4 is characterized in that: The push assembly (71) comprises a slide plate (710), a push rod (711) and a guide rod (712); the slide plate (710) is fixedly arranged on the outer wall of one of the insulating sleeves (600); a slide groove is arranged on the inner wall of the flange (5); the slide plate (710) is slidably connected to the slide groove; the guide rod (712) is fixedly arranged on the inner wall of the flange (5); the guide rod (712) is plugged into the slide plate (710); the push rod (711) is fixedly arranged at one end of the top of the slide plate (710) away from the insulating sleeve (600); the push rod (711) is plugged into the flange (5); a limit plate (502) is fixedly arranged on the top of the flange (5); the top of the push rod (711) is plugged into the limit plate (502).

6. The miniature high temperature and pressure resistant flexible multi-point thermocouple according to claim 5, characterized in that: The lifting assembly (72) comprises a lifting plate (720), an end cover (721) and a sealing plug (722). The lifting plate (720) is fixedly arranged at the top end of the push rod (711), the end cover (721) is fixedly arranged at the bottom end of the lifting plate (720) away from the push rod (711), the sealing plug (722) is fixedly arranged at the bottom of the end cover (721), the sealing plug (722) is plugged into the top of the pressure relief tube (70), and a plurality of exhaust holes (700) are evenly spaced outside the top of the pressure relief tube (70).

7. The miniature high temperature and pressure resistant flexible multi-point thermocouple according to claim 6, characterized in that: A high temperature resistant accordion protective cover (713) is fixedly provided at one end of the top of the slide plate (710) close to the insulating sliding sleeve (600), and a receiving groove is provided through the top of the slide groove, and the receiving groove is fixedly connected to the top of the high temperature resistant accordion protective cover (713).

8. The miniature high temperature and pressure resistant flexible multi-point thermocouple according to claim 7 is characterized in that: The interior of the upper connecting pipe (3) is filled with sealing slurry (30), and a plurality of armored thermocouples (2) pass through the sealing slurry (30).

9. The miniature high temperature and pressure resistant flexible multi-point thermocouple according to claim 8, characterized in that: A cover shell (8) is fixedly provided on the outer wall of one end of the pressure relief pipe (70) close to the exhaust hole (700), an air suction cylinder (80) is fixedly provided on the top of the flange (5), a motor (81) is fixedly provided inside the air suction cylinder (80), a fan (82) is fixedly provided on the output end thereof, an extraction pipe (83) is fixedly provided between one end of the air suction cylinder (80) and the cover shell (8), a connecting pipe (84) is fixedly provided on the other end of the air suction cylinder (80), a storage box (85) is fixedly provided on the top of the flange (5), and the connecting pipe (84) is fixedly connected to one end of the storage box (85), and the upper An annular tube (86) is fixedly provided on the outer surface of the connecting tube (3), a delivery tube (87) is fixedly provided between the annular tube (86) and the other end of the storage box (85), a plurality of air intake tubes (88) are fixedly provided between the annular tube (86) and the upper connecting tube (3), an injection port is provided on the top of the storage box (85), a sealing cover (89) is inserted into the injection port, a position sensor (890) is fixedly provided on the top of the limiting plate (502), an output end of which faces the lifting plate (720), and the motor (81) and the position sensor (890) are both electrically connected to the microcontroller.

10. The miniature high temperature and pressure resistant flexible multi-point thermocouple according to claim 9, characterized in that: An isolation tube (891) is fixedly provided at each end of the upper connecting tube (3) and one end of the sealing slurry (30), and a plurality of through holes (892) are provided at equal intervals on the outer wall of the sealing slurry (30) in the circumferential direction.

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