A high and low temperature resistant measuring box

Abstract

The present invention relates to the technical field of electric power systems, and discloses a high and low temperature resistant metering box, comprising a metering box body, a metering element arranged inside the metering box body, and a heat exchange part arranged on the top of the inner wall of the metering box body, and also comprising a heat exchange tube arranged inside the heat exchange part, and a cooling fan and a sealing mechanism arranged inside the heat exchange tube; the sealing mechanism comprises a sealing sleeve fixedly assembled on the inner wall of the heat exchange tube. The high and low temperature resistant metering box is reset by pulling the sealing plate, tightly fitting on the inner wall of the sealing sleeve, and the locking part is inserted into the vent to restore the sealing state, thereby effectively blocking the intrusion of external extreme gases into the inside of the metering box body, and through this setting, the metering box body can be completely isolated from the circulation of air in the closed state, effectively preventing the interference of external air on the internal environment, and even in extreme high and low temperature environments, it can ensure that the metering element is in a stable working environment, avoiding metering errors caused by temperature fluctuations.

Description

Technical Field

[0001] The invention belongs to the technical field of power systems, and in particular relates to a high and low temperature resistant metering box. Background Art

[0002] In the power system, high and low temperature resistant meter boxes are widely used in substations, power plants and other places to measure and monitor electric energy of power equipment. Their excellent high and low temperature resistance ensures that the meter boxes can maintain a stable working state under extreme climatic conditions, providing a strong guarantee for the safe and reliable operation of the power system.

[0003] At present, when facing extreme climatic conditions, especially extreme environments of high and low temperatures, the operating stability and reliability of traditional metering boxes are significantly reduced, and the continuous and accurate metering work cannot be ensured, which makes them insufficiently adaptable in extreme temperature environments and unable to effectively isolate the impact of external extreme temperatures on the internal environment of the metering box. Specifically, due to the design defects of the sealing structure, external high temperature or low temperature air can easily penetrate into the interior of the metering box and directly contact the internal metering components, causing component performance fluctuations or even damage, thereby seriously interfering with the stable maintenance of the internal environment of the metering box. This exchange of internal and external temperatures not only aggravates the generation of metering errors, but also shortens the service life of the metering box and its internal components, and reduces the metering accuracy and reliability of the overall system; therefore, there are deficiencies and cannot meet the user's usage needs. Therefore, further improvements are necessary.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a high and low temperature resistant metering box is provided, in order to achieve a more practical purpose. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a high and low temperature resistant metering box, which is achieved by the following specific technical means:

[0006] A high and low temperature resistant metering box, comprising a metering box body, a metering element arranged inside the metering box body, and a heat exchange part arranged on the top of the inner wall of the metering box body, and also comprising a heat exchange tube arranged inside the heat exchange part, and a cooling fan and a sealing mechanism arranged inside the heat exchange tube;

[0007] The sealing mechanism comprises a sealing sleeve fixedly mounted on the inner wall of the heat exchange tube, a ventilation hole for ventilation and heat exchange is provided inside the sealing sleeve, a sealing component for sealing and blocking the ventilation hole is provided inside the sealing sleeve, a groove is provided inside the sealing sleeve, and an elastic telescopic component is provided in the groove, and one side of the elastic telescopic component is connected to the sealing component;

[0008] The sealing assembly includes a sealing plate, which is provided with vent holes for ventilation and heat exchange. The inner wall of the sealing sleeve is fixedly equipped with a locking mechanism, which is inserted into the vent holes of the sealing plate for sealing and locking, so that the internal environment of the metering box can form a closed space and maintain the stability of the internal environment.

[0009] As a further description of the above technical solution: the sealing plate is pulled back to its original position by the elastic telescopic component, tightly fitting the inner wall of the sealing sleeve, and the locking part is inserted into the vent to achieve a sealed state. At the same time, the sealing ring on the inner wall of the vent is in contact with the outer wall of the locking part, thereby effectively blocking the intrusion of external extreme gases into the interior of the metering box. Through this arrangement, the metering box can be completely isolated from the circulation of air when in the closed state, effectively preventing the interference of external air on the internal environment, and even in extreme high and low temperature environments, it can ensure that the metering element is in a stable working environment, avoiding metering errors caused by temperature fluctuations.

[0010] Furthermore, a temperature sensor for sensing the temperature environment inside the metering box is fixedly mounted on the bottom of the heat exchange portion.

[0011] As a further description of the above technical solution: by setting up the temperature sensor, the temperature signal can be captured instantly, and the response mechanism of the control system can be quickly triggered, thereby ensuring the stability of the internal environment of the metering box.

[0012] Furthermore, the ventilation hole includes a first through hole and a second through hole, and the inner diameter of the first through hole is larger than the inner diameter of the second through hole.

[0013] As a further description of the above technical solution: by gradually reducing the size of the structure from the first through hole to the second through hole, when the hot air passes through the first through hole and enters the second through hole with a smaller inner diameter, its flow rate increases significantly due to the gradually decreasing cross-sectional area, forming a strong driving force.

[0014] Furthermore, the sealing assembly also includes a sealing ring fixedly mounted on the inner wall of the vent hole, a groove is provided inside the sealing plate, and a sealing airbag is provided in the groove, and the inner wall of the sealing airbag is in close contact with the sealing ring.

[0015] As a further description of the above technical solution: by making the sealing ring fit in contact with the outer wall of the locking portion, the sealing effect is enhanced, effectively preventing extreme gases from the outside from entering the interior of the metering box along the heat exchange tube and affecting the metering element.

[0016] Furthermore, the elastic telescopic component includes a telescopic sleeve fixedly mounted on the groove wall of the sealing sleeve, a telescopic rod is slidably installed inside the telescopic sleeve, one end of the telescopic rod is fixedly connected to the sealing plate, one end of the telescopic rod away from the sealing plate extends to the interior of the telescopic sleeve and is fixedly connected to the limit plate, and the outer peripheral sleeve of the telescopic sleeve is provided with a fixing spring for resetting the telescopic rod.

[0017] As a further description of the above technical solution: based on the restoring force of the fixed spring, the sealing plate is pulled back to its original position, tightly fitted to the inner wall of the sealing sleeve, and the sealing state is restored.

[0018] Furthermore, the sealing mechanism also includes a pressure component arranged on the sealing plate, the pressure component includes a pressure plate movably assembled on the side wall of the sealing plate, elastic rubber rings are fixedly connected between the left and right sides of the pressure plate and the side wall of the sealing plate, a pressure piece is fixedly installed on the side of the pressure plate facing the sealing airbag, and the pressure piece is in close contact with the sealing airbag, and a fixing block is fixedly installed on the side of the pressure plate away from the pressure piece.

[0019] As a further description of the above technical solution: through this arrangement, the sealing ring can be in close contact with the outer wall of the locking part to the greatest extent, thereby effectively enhancing its sealing performance.

[0020] Furthermore, the locking mechanism includes a locking portion fixedly mounted on the inner wall of the sealing sleeve, a locking block for locking and limiting the sealing plate is slidably mounted on the locking portion, a fixed bevel block is fixedly mounted on the bottom of the locking block, a locking spring is fixedly connected between the bottom of the fixed bevel block and the inner wall of the locking portion, and a supporting assembly for driving the locking block to telescope up and down is arranged inside the locking portion.

[0021] As a further description of the above technical solution: This setting realizes precise locking and unlocking of the sealing plate, which not only improves the convenience of operation, but also ensures the stable locking of the sealing plate under extreme conditions, effectively preventing metering errors or equipment damage caused by accidental opening.

[0022] Further, the support assembly includes a fixed plate fixedly mounted on the inner wall of the locking portion, an elastic corrugated rubber ring is fixedly mounted on one side of the fixed plate, an extrusion oblique block is fixedly mounted on the side of the elastic corrugated rubber ring away from the fixed plate, an electromagnet, an iron block and a support spring are arranged on the inner side of the elastic corrugated rubber ring, the electromagnet is fixedly mounted on the side wall of the fixed plate, the iron block is fixedly mounted on the side wall of the extrusion oblique block, and the support spring is located between the fixed plate and the extrusion oblique block;

[0023] Wherein, the inclined surface of the extrusion inclined block is in close contact with the inclined surface of the fixed inclined block.

[0024] As a further description of the above technical solution: through this arrangement, the locking block can be driven to lock the sealing plate.

[0025] Furthermore, a fixing groove is provided on one side of the locking block, and an extrusion assembly for pressurizing the pressurizing assembly is provided in the fixing groove, and the extrusion assembly includes an extrusion seat fixedly assembled in the fixing groove of the locking block, a guide rod is fixedly installed inside the extrusion seat, a guide seat is slidably installed on the guide rod, an extrusion spring is sleeved on the outer periphery of the guide rod, and the extrusion spring is located between the extrusion seat and the guide seat, a first extrusion rod is movably installed on the extrusion seat, a second extrusion rod is movably installed on the guide seat, one end of the second extrusion rod is movably connected to the middle part of the first extrusion rod, and an extrusion piece is fixedly installed on the end of the first extrusion rod away from the extrusion seat, the second extrusion rod is pulled by the pulling force of the extrusion spring, and the second extrusion rod is driven to push the first extrusion rod and the extrusion piece to extrude the fixed block.

[0026] As a further description of the above technical solution: This setting can achieve precise pressurization of the sealing airbag, thereby enhancing the close contact between the sealing ring and the outer wall of the locking part. This setting not only improves the sealing effect, but also improves the adaptability of the metering box to extreme environments, so that the metering box can still maintain stable sealing performance under extreme conditions.

[0027] Furthermore, the front side of the metering box is connected with a box door through a hinge, a metering element is arranged inside the metering box, and ventilation baffles for ventilation and heat exchange are fixedly installed on the left and right sides of the metering box;

[0028] The interior of the heat exchange tube is fixedly equipped with a heat exchange baffle for shielding and protection.

[0029] As a further description of the above technical solution: by setting the ventilation baffle, the air circulation mode can be controlled, thereby enhancing the heat dissipation effect.

[0030] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0031] 1. This high and low temperature resistant metering box cooperates with each other among the sealing sleeve, the sealing plate, the vent, the sealing ring and the locking part. The sealing plate is pulled back to its original position through the elastic telescopic component, and is tightly fitted to the inner wall of the sealing sleeve. The locking part is inserted into the vent to achieve a sealed state. At the same time, the sealing ring on the inner wall of the vent is in contact with the outer wall of the locking part, thereby effectively blocking the intrusion of external extreme gases into the inside of the metering box. Through this arrangement, the metering box can be completely isolated from the circulation of air in the closed state, effectively preventing the interference of external air on the internal environment. Even in extreme high and low temperature environments, it can ensure that the metering element is in a stable working environment, avoiding metering errors caused by temperature fluctuations.

[0032] 2. This high and low temperature resistant metering box realizes the precise locking and unlocking of the sealing plate through the linkage of the electromagnet and iron block, the extrusion bevel block, the fixed bevel block and the locking card block. This setting not only improves the convenience of operation, but also ensures the stable locking of the sealing plate under extreme conditions, effectively preventing the metering error or equipment damage caused by accidental opening.

[0033] 3. This high and low temperature resistant metering box realizes precise pressurization of the sealing airbag through the mutual cooperation between the locking part, the extrusion component and the pressurizing component, thereby enhancing the close contact between the sealing ring and the outer wall of the locking part. This setting not only improves the sealing effect, but also improves the adaptability of the metering box to extreme environments, so that the metering box can still maintain stable sealing performance under extreme conditions, effectively preventing the interference of external extreme air on the internal environment of the metering box, and ensuring the accuracy and reliability of the metering results.

[0034] 4. This high and low temperature resistant metering box provides an efficient heat dissipation channel for the inside of the metering box through the cooperation between the heat exchange part, temperature sensor, heat exchange tube and cooling fan, and utilizes the combined use of cooling fan and heat exchange tube, which effectively reduces the impact of high temperature environment on metering elements. This setting not only extends the service life of metering elements, but also improves metering accuracy. At the same time, when the temperature returns to the appropriate range, the automatic stop of the cooling fan and the rapid resetting of the sealing plate ensure the rapid stabilization of the internal environment of the metering box and avoid unnecessary energy consumption and heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0036] Figure 1 It shows a schematic diagram of an overall three-dimensional structure provided according to an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of the internal structure of a metering box provided in an embodiment of the present invention is shown;

[0038] Figure 3 It shows a schematic diagram of a partial structure of a metering box provided in an embodiment of the present invention;

[0039] Figure 4 It shows a schematic diagram of the overall structure of the heat exchange part provided in an embodiment of the present invention;

[0040] Figure 5A schematic diagram of the installation structure of the heat exchange part and the heat exchange tube according to an embodiment of the present invention is shown;

[0041] Figure 6 A schematic diagram of the internal structure of a heat exchange tube provided in an embodiment of the present invention is shown;

[0042] Figure 7 A schematic diagram of a partial structure of a sealing mechanism provided according to an embodiment of the present invention is shown;

[0043] Figure 8 It shows a schematic diagram of the installation structure of the sealing mechanism and the locking mechanism provided in an embodiment of the present invention;

[0044] Fig. 9 A schematic diagram of a partial structure of a sealing assembly provided according to an embodiment of the present invention is shown;

[0045] Fig.10 A schematic diagram of a partial structure of an elastic telescopic component provided in an embodiment of the present invention is shown;

[0046] Fig.11 The embodiment of the present invention provides Fig. 9 The enlarged schematic diagram of part A in the middle;

[0047] Fig.12 The partial structure diagram of the locking mechanism provided in the embodiment of the present invention is shown. Figure 1 ;

[0048] Fig.13 The partial structure diagram of the locking mechanism provided in the embodiment of the present invention is shown. Figure 2 ;

[0049] Fig.14 A partial structural schematic diagram of a support assembly provided according to an embodiment of the present invention is shown;

[0050] Fig.15 The embodiment of the present invention provides Fig.13 Enlarged schematic diagram of part B in the middle.

[0051] Legend:

[0052] 10. Metering box; 11. Box door; 12. Metering element; 13. Ventilation baffle;

[0053] 20. heat exchange unit; 21. temperature sensor;

[0054] 30. heat exchange tube; 31. heat exchange baffle;

[0055] 40. Cooling fan;

[0056] 50. Sealing mechanism; 51. Sealing sleeve; 52. Ventilation hole; 521. First through hole; 522. Second through hole; 53. Sealing assembly; 531. Sealing plate; 532. Ventilation hole; 533. Sealing ring; 534. Sealing airbag; 54. Elastic telescopic assembly; 541. Telescopic sleeve; 542. Telescopic rod; 543. Limiting plate; 544. Fixed spring; 55. Pressurizing assembly; 551. Pressurizing plate; 552. Elastic rubber ring; 553. Fixed block; 554. Pressurizing member;

[0057] 60, locking mechanism; 61, locking part; 62, supporting assembly; 621, fixing plate; 622, elastic corrugated rubber ring; 623, extrusion inclined block; 624, electromagnet; 625, iron block; 626, supporting spring; 63, locking block; 631, fixing inclined block; 632, locking spring;

[0058] 70. Extrusion assembly; 71. Extrusion seat; 72. Guide rod; 73. Guide seat; 74. Extrusion spring; 75. First extrusion rod; 76. Second extrusion rod; 77. Extrusion piece. DETAILED DESCRIPTION

[0059] 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 only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0060] See also Figures 1 to 15A high and low temperature resistant metering box comprises a metering box body 10, a metering element 12 arranged inside the metering box body 10, and a heat exchange part 20 arranged on the top of the inner wall of the metering box body 10, and also comprises a heat exchange tube 30 arranged inside the heat exchange part 20, and a cooling fan 40 and a sealing mechanism 50 arranged inside the heat exchange tube 30; the sealing mechanism 50 comprises a sealing sleeve 51 fixedly assembled on the inner wall of the heat exchange tube 30, and a ventilation hole 52 for ventilation and heat exchange is opened inside the sealing sleeve 51, and a sealing component 53 for sealing and blocking the ventilation hole 52 is arranged inside the sealing sleeve 51, and a groove is opened inside the sealing sleeve 51, and an elastic telescopic component 54 is arranged in the groove, and one side of the elastic telescopic component 54 is connected to the sealing component 53; the sealing component 53 comprises a sealing plate 531, and a vent 532 for ventilation and heat exchange is opened on the sealing plate 531, and the inner wall of the sealing sleeve 51 A locking mechanism 60 is fixedly assembled, and the locking mechanism 60 is inserted into the vent hole 532 of the sealing plate 531 to seal and lock, so that the internal environment of the metering box 10 can form a closed space and maintain the stability of the internal environment; the sealing plate 531 is pulled back to its original position by the elastic telescopic component 54, and the inner wall of the sealing sleeve 51 is tightly fitted, and the locking part 61 is inserted into the vent hole 532 to achieve a sealed state, and at the same time, the sealing ring 533 on the inner wall of the vent hole 532 is in contact with the outer wall of the locking part 61, thereby effectively blocking the intrusion of external extreme gases into the interior of the metering box 10, and through this arrangement, the metering box 10 can be completely isolated from the circulation of air in the closed state, effectively preventing the interference of external air on the internal environment, and even in extreme high and low temperature environments, it can ensure that the metering element 12 is in a stable working environment, avoiding metering errors caused by temperature fluctuations.

[0061] See also Figures 1 to 6 The front side of the metering box 10 is connected with a box door 11 through a hinge, a metering element 12 is arranged inside the metering box 10, and ventilation baffles 13 for ventilation and heat exchange are fixedly installed on the left and right sides of the metering box 10; a heat exchange baffle 31 for shielding and protection is fixedly installed inside the heat exchange tube 30; the setting of the ventilation baffle 13 can control the air circulation mode, thereby enhancing the heat dissipation effect.

[0062] See also Figures 2 to 5 A temperature sensor 21 for sensing the internal temperature environment of the metering box 10 is fixedly installed at the bottom of the heat exchange part 20; the temperature sensor 21 can capture the temperature signal in real time and quickly trigger the response mechanism of the control system, thereby ensuring the stability of the internal environment of the metering box 10.

[0063] See also Figures 7 and 8The ventilation hole 52 includes a first through hole 521 and a second through hole 522, and the inner diameter of the first through hole 521 is larger than the inner diameter of the second through hole 522; when the hot air passes through the ventilation hole 52, through the structure that gradually shrinks from the first through hole 521 to the second through hole 522, when the hot air passes through the first through hole 521 and enters the second through hole 522 with a smaller inner diameter, its flow rate increases significantly due to the gradual decrease in cross-sectional area, forming a strong driving force, forcing the sealing plate 531 to separate from the inner wall of the sealing sleeve 51, and forming the necessary ventilation gap.

[0064] See also Figures 8 to 9 The sealing assembly 53 also includes a sealing ring 533 fixedly mounted on the inner wall of the vent hole 532. A groove is provided inside the sealing plate 531, and a sealing airbag 534 is provided in the groove. The inner wall of the sealing airbag 534 is in close contact with the sealing ring 533. By providing a sealing ring 533 on the inner wall of the vent hole 532 and utilizing the sealing ring 533 to be in close contact with the outer wall of the locking portion 61, the sealing effect is enhanced, and the extreme gas from the outside is effectively prevented from entering the interior of the metering box 10 along the heat exchange tube 30 to affect the metering element 12.

[0065] See also Figures 7 to 10 The elastic telescopic component 54 includes a telescopic sleeve 541 fixedly assembled on the groove wall of the sealing sleeve 51, a telescopic rod 542 is slidably installed inside the telescopic sleeve 541, one end of the telescopic rod 542 is fixedly connected to the sealing plate 531, and the end of the telescopic rod 542 away from the sealing plate 531 extends to the inside of the telescopic sleeve 541 and is fixedly connected to the limit plate 543, and the outer peripheral sleeve of the telescopic sleeve 541 is provided with a fixed spring 544 for resetting the telescopic rod 542; when the internal temperature of the metering box 10 returns to a suitable range, the control system immediately issues an instruction to stop the operation of the cooling fan 40. At this time, based on the restoring force of the fixed spring 544, the sealing plate 531 is pulled back to fit tightly against the inner wall of the sealing sleeve 51 to restore the sealing state.

[0066] See also Figures 9 to 11The sealing mechanism 50 also includes a pressurizing assembly 55 arranged on the sealing plate 531, and the pressurizing assembly 55 includes a pressurizing plate 551 movably assembled on the side wall of the sealing plate 531, and elastic rubber rings 552 are fixedly connected between the left and right sides of the pressurizing plate 551 and the side walls of the sealing plate 531, and a pressurizing member 554 is fixedly installed on the side of the pressurizing plate 551 facing the sealing airbag 534, and the pressurizing member 554 is in close contact with the sealing airbag 534, and a fixing block 553 is fixedly installed on the side of the pressurizing plate 551 away from the pressurizing member 554; the pressure applied to the fixing block 553 by the extrusion member 77 drives the pressurizing plate 551 to drive the pressurizing member 554 to appropriately squeeze the sealing airbag 534, so that the sealing airbag 534 resists the inner sealing ring 533, so that the sealing ring 533 is in close contact with the outer wall of the locking portion 61 to the greatest extent, thereby effectively enhancing its sealing performance.

[0067] See also Figures 7 to 13 The locking mechanism 60 includes a locking portion 61 fixedly assembled on the inner wall of the sealing sleeve 51, a locking block 63 for locking and limiting the sealing plate 531 is slidably installed on the locking portion 61, a fixed inclined block 631 is fixedly installed at the bottom of the locking block 63, a locking spring 632 is fixedly connected between the bottom of the fixed inclined block 631 and the inner wall of the locking portion 61, and a supporting component 62 for driving the locking block 63 to move up and down is arranged inside the locking portion 61; this arrangement realizes accurate locking and unlocking of the sealing plate 531, which not only improves the convenience of operation, but also ensures the stable locking of the sealing plate 531 under extreme conditions, and effectively prevents metering errors or equipment damage caused by accidental opening.

[0068] See also Figure 12 to Figure 14 The support assembly 62 includes a fixed plate 621 fixedly mounted on the inner wall of the locking portion 61, an elastic corrugated rubber ring 622 is fixedly mounted on one side of the fixed plate 621, an extrusion inclined block 623 is fixedly mounted on the side of the elastic corrugated rubber ring 622 away from the fixed plate 621, an electromagnet 624, an iron block 625 and a support spring 626 are arranged on the inner side of the elastic corrugated rubber ring 622, the electromagnet 624 is fixedly mounted on the side wall of the fixed plate 621, the iron block 625 is fixedly mounted on the side wall of the extrusion inclined block 623, and the support spring 626 is located on the fixed plate 621 and the extrusion bevel block 623; wherein, the inclined surface of the extrusion bevel block 623 is in contact with the inclined surface of the fixed bevel block 631; the electromagnet 624 is powered off to release the magnetic force, and the elastic corrugated rubber ring 622 and the supporting spring 626 work together to push the extrusion bevel block 623 to reset. At the same time, the extrusion bevel block 623 during resetting uses the inclined surface to push the fixed bevel block 631 to move to the outside of the locking portion 61, and drives the locking block 63 to protrude from the surface of the locking portion 61, so as to drive the locking block 63 to lock the sealing plate 531.

[0069] See also Figures 12 to 15A fixing groove is provided on one side of the locking block 63, and an extrusion assembly 70 for pressurizing the pressurizing assembly 55 is provided in the fixing groove. The extrusion assembly 70 includes an extrusion seat 71 fixedly assembled in the fixing groove of the locking block 63, a guide rod 72 is fixedly installed inside the extrusion seat 71, a guide seat 73 is slidably installed on the guide rod 72, an extrusion spring 74 is sleeved on the outer periphery of the guide rod 72, and the extrusion spring 74 is located between the extrusion seat 71 and the guide seat 73, a first extrusion rod 75 is movably installed on the extrusion seat 71, a second extrusion rod 76 is movably installed on the guide seat 73, one end of the second extrusion rod 76 is movably connected to the middle part of the first extrusion rod 75, and an extrusion piece 77 is fixedly installed on the end of the first extrusion rod 75 away from the extrusion seat 71, and the second extrusion rod 76 is driven to push the first The extrusion rod 75 and the extrusion piece 77 squeeze the fixed block 553; the elastic force of the extrusion spring 74 pulls the guide seat 73 to slide on the guide rod 72, and at the same time drives the second extrusion rod 76 to squeeze the second extrusion rod 76, and drives the second extrusion rod 76 to drive the extrusion piece 77 to pop out, and at the same time the popped-out extrusion piece 77 contacts the fixed block 553 on the pressurizing assembly 55, thereby achieving precise pressurization of the sealing airbag 534, thereby enhancing the close contact between the sealing ring 533 and the outer wall of the locking portion 61. This arrangement not only improves the sealing effect, but also improves the adaptability of the metering box 10 to extreme environments, so that the metering box 10 can still maintain stable sealing performance under extreme conditions, effectively preventing the interference of external extreme air on the internal environment of the metering box 10, and ensuring the accuracy and reliability of the metering results.

[0070] The specific usage and function of this embodiment are as follows:

[0071] Working principle: When in use, by laying a heat preservation layer on the inner wall of the metering box 10, the heat preservation layer can effectively isolate the external temperature fluctuation and provide a stable working environment for the internal metering element 12. When the metering box 10 is exposed to a high temperature environment, the temperature inside the metering box 10 will continue to rise due to the long-term operation of the metering element 12. The temperature rise signal is captured instantly by the temperature sensor 21, and the response mechanism of the control system is triggered. At this time, the electromagnet 624 receives the power-on command, generates a strong magnetic force, attracts the iron block 625 to move, and then drives the extrusion bevel block 623 connected thereto to slide along a preset path, and at the same time squeezes the elastic corrugated rubber ring 622 and the support spring 626. When the extrusion bevel block 623 moves, at this time, based on the elastic force of the locking spring 632, the fixed bevel block 631 and the locking block 63 are pulled down synchronously, and the locking block 63 is pulled completely to the inside of the locking portion 61, thereby completing the unlocking of the sealing plate 531.

[0072] At the same time, the cooling system starts quickly, and the cooling fan 40 starts to run under program control. The cooling fan 40 generates strong suction force to suck the hot air accumulated in the metering box 10 into the heat exchange tube 30. When the hot air passes through the ventilation hole 52, the first through hole 521 gradually narrows to the second through hole 522. When the hot air passes through the first through hole 521 and enters the second through hole 522 with a smaller inner diameter, the cross-sectional area gradually decreases, and its flow rate increases significantly, forming a strong driving force, forcing the sealing plate 531 and the inner wall of the sealing sleeve 51 to separate from each other, forming a necessary ventilation gap, and at the same time, under the action of wind, the locking part 61 is automatically separated from the vent 532 on the sealing plate 531 at this moment, providing a smooth exhaust channel for the hot air, and the hot air is finally discharged to the external environment through the ventilation baffle 13 on the outer wall of the metering box 10, thereby realizing the exhaust of the heat inside the metering box 10, achieving the purpose of cooling the metering element 12 in the metering box 10, which is beneficial to the operation of the metering element 12;

[0073] Secondly, when the temperature sensor 21 detects that the internal temperature of the metering box 10 returns to a suitable range, the control system immediately issues a command to stop the operation of the cooling fan 40. At this time, the fixing spring 544 exerts its restoring force, pulls the sealing plate 531 to reset, and fits tightly against the inner wall of the sealing sleeve 51. The locking portion 61 is reinserted into the vent hole 532 to restore the sealing state. In addition, a sealing ring 533 is provided on the inner wall of the vent hole 532, and the sealing ring 533 is in contact with the outer wall of the locking portion 61 to enhance the sealing effect. It effectively prevents extreme gases from entering the metering box 10 along the heat exchange tube 30 and affecting the metering element 12; the electromagnet 624 is then powered off to release the magnetic force, and the elastic corrugated rubber ring 622 and the support spring 626 work together to push the extrusion bevel block 623 to reset. At the same time, the extrusion bevel block 623 during the reset uses the inclined surface to push the fixed bevel block 631 to move to the outside of the locking portion 61, and drives the locking block 63 to protrude from the surface of the locking portion 61, so as to drive the locking block 63 to lock the sealing plate 531 again;

[0074] When the locking block 63 is extended to a certain extent, the first extrusion rod 75 on the pressurizing assembly 55 loses the restriction of the locking portion 61. At this time, the elastic force of the extrusion spring 74 is brought into play. Based on the elastic force of the extrusion spring 74, the guide seat 73 is pulled to slide on the guide rod 72, and the second extrusion rod 76 is driven to squeeze the second extrusion rod 76, and the second extrusion rod 76 drives the extrusion member 77 to pop out outward. At the same time, the popped-out extrusion member 77 contacts the fixed block 553 on the pressurizing assembly 55. The pressure applied to the fixed block 553 by the extrusion member 77 drives the pressurizing plate 551 to drive the pressurizing member 552 to move. 54 applies moderate squeezing to the sealing airbag 534, causing the sealing airbag 534 to contact the inner sealing ring 533, so that the sealing ring 533 is in close contact with the outer wall of the locking portion 61 to the greatest extent, thereby effectively enhancing its sealing performance and forming a sealing barrier, further ensuring that the sealing plate 531 can completely isolate the circulation of air in the closed state, effectively preventing extreme external air from entering the interior of the metering box 10, thereby ensuring that the internal environment of the metering box 10 is stably maintained, effectively avoiding the occurrence of metering errors, and at the same time extending the service life of the metering box 10 and the internal metering element 12.

[0075] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high and low temperature resistant metering box, comprising a metering box body (10), a metering element (12) arranged inside the metering box body (10), and a heat exchange portion (20) arranged on the top of the inner wall of the metering box body (10), characterized in that: It also includes a heat exchange tube (30) arranged inside the heat exchange portion (20), and a cooling fan (40) and a sealing mechanism (50) arranged inside the heat exchange tube (30); The sealing mechanism (50) comprises a sealing sleeve (51) fixedly mounted on the inner wall of the heat exchange tube (30); a ventilation hole (52) for ventilation and heat exchange is provided inside the sealing sleeve (51); a sealing component (53) for sealing and blocking the ventilation hole (52) is provided inside the sealing sleeve (51); a groove is provided inside the sealing sleeve (51), and an elastic telescopic component (54) is provided in the groove; one side of the elastic telescopic component (54) is connected to the sealing component (53); The sealing assembly (53) comprises a sealing plate (531), the sealing plate (531) is provided with a vent hole (532) for ventilation and heat exchange, and the inner wall of the sealing sleeve (51) is fixedly equipped with a locking mechanism (60), and the locking mechanism (60) is inserted into the vent hole (532) of the sealing plate (531) for sealing and locking, so that the internal environment of the metering box (10) can form a closed space and maintain the stability of the internal environment; The locking mechanism (60) comprises a locking portion (61) fixedly mounted on the inner wall of the sealing sleeve (51); a locking block (63) for locking and limiting the sealing plate (531) is slidably mounted on the locking portion (61); a fixed inclined block (631) is fixedly mounted on the bottom of the locking block (63); a locking spring (632) is fixedly connected between the bottom of the fixed inclined block (631) and the inner wall of the locking portion (61); and a supporting assembly (62) for driving the locking block (63) to telescope up and down is arranged inside the locking portion (61); The support assembly (62) comprises a fixed plate (621) fixedly mounted on the inner wall of the locking portion (61); an elastic corrugated rubber ring (622) is fixedly mounted on one side of the fixed plate (621); an extrusion bevel block (623) is fixedly mounted on the side of the elastic corrugated rubber ring (622) away from the fixed plate (621); an electromagnet (624), an iron block (625) and a support spring (626) are arranged on the inner side of the elastic corrugated rubber ring (622); the electromagnet (624) is fixedly mounted on the side wall of the fixed plate (621); the iron block (625) is fixedly mounted on the side wall of the extrusion bevel block (623); and the support spring (626) is located between the fixed plate (621) and the extrusion bevel block (623); The inclined surface of the extruding inclined block (623) is in close contact with the inclined surface of the fixing inclined block (631).

2. A high and low temperature resistant metering box according to claim 1, characterized in that: A temperature sensor (21) for sensing the internal temperature environment of the metering box (10) is fixedly mounted on the bottom of the heat exchange portion (20).

3. A high and low temperature resistant metering box according to claim 1, characterized in that: The ventilation hole (52) comprises a first through hole (521) and a second through hole (522); the inner diameter of the first through hole (521) is greater than the inner diameter of the second through hole (522).

4. The high and low temperature resistant metering box according to claim 1, characterized in that: The sealing assembly (53) further comprises a sealing ring (533) fixedly mounted on the inner wall of the vent hole (532); a groove is provided inside the sealing plate (531), and a sealing airbag (534) is provided in the groove; the inner wall of the sealing airbag (534) is in close contact with the sealing ring (533).

5. The high and low temperature resistant metering box according to claim 1, characterized in that: The elastic telescopic assembly (54) comprises a telescopic sleeve (541) fixedly mounted on the groove wall of the sealing sleeve (51); a telescopic rod (542) is slidably mounted inside the telescopic sleeve (541); one end of the telescopic rod (542) is fixedly connected to the sealing plate (531); one end of the telescopic rod (542) away from the sealing plate (531) extends to the inside of the telescopic sleeve (541) and is fixedly connected to the limit plate (543); and a fixing spring (544) for resetting the telescopic rod (542) is provided on the outer periphery of the telescopic sleeve (541).

6. A high and low temperature resistant metering box according to claim 4, characterized in that: The sealing mechanism (50) further comprises a pressurizing assembly (55) arranged on the sealing plate (531), the pressurizing assembly (55) comprising a pressurizing plate (551) movably mounted on the side wall of the sealing plate (531), elastic rubber rings (552) being fixedly connected between the left and right sides of the pressurizing plate (551) and the side wall of the sealing plate (531), a pressurizing member (554) being fixedly mounted on the side of the pressurizing plate (551) facing the sealing airbag (534), and the pressurizing member (554) being in close contact with the sealing airbag (534), and a fixing block (553) being fixedly mounted on the side of the pressurizing plate (551) away from the pressurizing member (554).

7. A high and low temperature resistant metering box according to claim 6, characterized in that: A fixing groove is formed on one side of the locking block (63), and an extrusion assembly (70) for pressurizing the pressurizing assembly (55) is arranged in the fixing groove, the extrusion assembly (70) comprising an extrusion seat (71) fixedly assembled in the fixing groove of the locking block (63), a guide rod (72) fixedly mounted inside the extrusion seat (71), a guide seat (73) slidably mounted on the guide rod (72), an extrusion spring (74) sleeved on the outer circumference of the guide rod (72), and the extrusion spring (74) is located between the extrusion seat (71) and the guide seat (73). A first extrusion rod (75) is movably mounted on the extrusion seat (71), and a second extrusion rod (76) is movably mounted on the guide seat (73); one end of the second extrusion rod (76) is movably connected to the middle of the first extrusion rod (75); an extrusion member (77) is fixedly mounted on one end of the first extrusion rod (75) away from the extrusion seat (71); the second extrusion rod (76) is pulled by the pulling force of the extrusion spring (74), so that the second extrusion rod (76) pushes the first extrusion rod (75) and the extrusion member (77) to extrude the fixed block (553).

8. The high and low temperature resistant metering box according to claim 1, characterized in that: The front side of the metering box (10) is connected to a box door (11) via a hinge, a metering element (12) is arranged inside the metering box (10), and ventilation baffles (13) for ventilation and heat exchange are fixedly mounted on the left and right sides of the metering box (10); A heat exchange baffle (31) for shielding and protection is fixedly mounted inside the heat exchange tube (30).

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