Process method and device for improving heat stability of organic heat carrier heat supply system through gas pressurization

Abstract

The invention discloses a process method and device for improving heat stability through gas pressurization of an organic heat carrier heat supply system, and relates to the technical field of heat conduction oil systems, the device comprises an expansion tank, the bottom end of the expansion tank is fixedly connected with a heat conduction oil pipeline, a mounting frame is arranged on one side of the expansion tank, and the device further comprises a nitrogen tank, a gas inlet mechanism and an exhaust mechanism. By arranging the air inlet mechanism, the hydraulic cylinder operates to drive the partition plate to move, and the partition plate moves downwards to reduce the space in the expansion tank, so that the air pressure in the expansion tank is increased, and the condition of negative pressure is avoided; meanwhile, when the partition plate moves downwards, the second air inlet pipe is automatically opened, nitrogen in the nitrogen tank can enter the expansion tank through the second air inlet pipe, and the air pressure in the expansion tank is increased in the mode that the space in the expansion tank is reduced through the displacement of the partition plate; and the speed of supplementing gas in the expansion tank is increased, so that the negative pressure working condition in the expansion tank is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of heat transfer oil systems, and in particular to a process method and a device for pressurizing gas in an organic heat carrier heating system to improve thermal stability. Background Art

[0002] The thermal oil system utilizes a thermal oil furnace to heat the organic heat carrier, and transports the heated thermal oil to various heat users through forced circulation via a thermal oil circulation pump. The thermal oil after heat exchange is then collected from the oil outlet of the heat user and returned to the thermal oil furnace for heating, thus forming a complete closed-loop heating system. The thermal oil system overcomes many unfavorable factors such as low thermal efficiency, low recycling rate, environmental impact, and difficulty in control of electric heating, steam heating, and open flame heating. It has the characteristics of high efficiency, safety, stability, and reliable operation. At present, thermal oil heating technology is mature and is widely used in various industries.

[0003] The thermal oil system generally includes a thermal oil furnace, an expansion tank unit, an oil storage tank unit, a nitrogen blanketing and fire extinguishing unit, a thermal oil circulation unit, a thermal oil loading and unloading unit, a thermal oil heat exchange unit, control, instrumentation and safety protection units and related pipelines. The expansion tank is mainly used to absorb the increased volume capacity of the thermal oil in the system due to expansion at the working temperature. Under normal circumstances, the thermal oil in the expansion tank does not participate in the system circulation. During the initial operating condition heating operation, the thermal oil expanded out of the system is cooled here.

[0004] However, when the expansion tank in the heat transfer oil system discharges oil into the oil storage tank quickly, the liquid level drops too quickly and there is no time to replenish nitrogen, a negative pressure condition will occur in the expansion tank, affecting the outflow of low-temperature heat transfer oil from the expansion tank for cold oil replacement, thereby affecting the thermal stability of the heat transfer oil in the heat transfer oil system. In order to avoid negative pressure conditions in the expansion tank, a process method and device for pressurizing the gas in an organic heat carrier heating system to improve thermal stability are provided. Summary of the invention

[0005] The purpose of the present invention is to provide a process method and device for pressurizing gas in an organic heat carrier heating system to improve thermal stability in order to avoid negative pressure conditions in an expansion tank.

[0006] To achieve the above object, the present invention provides the following technical solution: a device for pressurizing gas in an organic heat carrier heating system to improve thermal stability, comprising an expansion tank, a heat transfer oil pipeline is fixedly connected to the bottom end of the expansion tank, a mounting frame is provided on one side of the expansion tank, a nitrogen tank is fixedly connected to the top end of the mounting frame, the nitrogen in the nitrogen tank enters the expansion tank through an air intake mechanism, and the excess nitrogen in the expansion tank is discharged through an exhaust mechanism; The air intake mechanism includes a hydraulic cylinder, which is installed at the top of the expansion tank. The output end of the hydraulic cylinder is connected to a partition, which is slidably connected to the inner wall of the expansion tank. The top of the partition is fixedly connected to a movable pipe, and the inner wall of the movable pipe is slidably connected to a connecting pipe. The outer wall of one side of the connecting pipe is fixedly connected to a first air intake pipe and a second air intake pipe. The first air intake pipe is located above the second air intake pipe. The first air intake pipe and the second air intake pipe are both connected to the nitrogen tank. A vacuum pump is installed on the outer wall of the first air intake pipe.

[0007] As a further solution of the present invention: the intake mechanism also includes a fixing seat, the fixing seat is fixedly connected to the top of one side of the movable tube, the fixing seat is slidably connected inside with a card block extending from the fixing seat, the card block and the fixing seat are connected with a connecting spring, the outer wall of the second intake pipe is fixedly connected with a mounting seat, the mounting seat is slidably connected inside with a vertical plate that passes through the mounting seat, the outer wall of the vertical plate is provided with a through hole, the top of the vertical plate is fixedly connected with a top plate, the bottom end of the mounting seat is fixedly connected with a fixing plate, the bottom end of the vertical plate is rotatably connected with a rotating plate, the outer wall of the top plate is located above the rotating plate and is fixedly connected with a horizontal plate, the rotating plate is rotatably connected to the vertical plate through a connecting shaft, the outer wall of the rotating plate located between the rotating plate and the vertical plate is connected with a torsion spring, the outer wall of the rotating plate is fixedly connected with a positioning plate, and one end of the positioning plate contacts the outer wall of the fixing plate.

[0008] As a further scheme of the present invention: the exhaust mechanism includes an exhaust pipe, the exhaust pipe is fixedly connected to the top end of the connecting pipe, the inner wall of the exhaust pipe is rotatably connected to a baffle, one end of the baffle is fixedly connected to the first bevel gear, the interior of the exhaust pipe is located at the outer wall of the first bevel gear and is rotatably connected to the second bevel gear, the bottom end of the second bevel gear is fixedly connected to a mounting shaft, the bottom end of the mounting shaft is fixedly connected to the first spur gear, the bottom end of the connecting pipe is rotatably connected to a rotating cylinder, the first spur gear contacts the rotating cylinder, the interior of the partition is rotatably connected to a rotating ring extending to the inner cavity of the movable tube, the interior of the partition is located at the outer wall of the rotating ring and is rotatably connected to the second spur gear, a motor is installed on the top of the partition, the output end of the motor is connected to the second spur gear, the top of the rotating ring is fixedly connected to a plug rod, and a slot is provided at the bottom end of the rotating cylinder.

[0009] As a further solution of the present invention: the outer wall of the partition is in contact with the inner wall of the expansion tank, and the inner wall of the movable pipe is in contact with the outer wall of the connecting pipe.

[0010] As a further solution of the present invention: one end of the clamping block is provided with an inclined surface, and the shape of the clamping block is L-shaped.

[0011] As a further solution of the present invention: one end of the positioning plate facing the fixing plate is planar.

[0012] As a further solution of the present invention: the outer wall of the insertion rod is in contact with the inner wall of the slot.

[0013] As a further solution of the present invention: a first tooth groove is formed on the outer wall of the rotating ring, and the first tooth groove is meshed with the second spur gear.

[0014] As a further solution of the present invention: the first bevel gear is meshed with the second bevel gear, the outer wall of the rotating cylinder is provided with a second tooth groove, and the second tooth groove is meshed with the first spur gear.

[0015] A process for pressurizing the gas of an organic heat carrier heating system to improve thermal stability, the specific steps are as follows: Step 1: Start the vacuum pump, and the vacuum pump runs to transport the nitrogen in the nitrogen tank to the expansion tank through the first air inlet pipe, the connecting pipe and the movable pipe; Step 2: When the gas vacuum pump in the expansion tank is too late to be replenished, the hydraulic cylinder is started, and the operation of the hydraulic cylinder drives the partition to move. The displacement of the partition reduces the space in the expansion tank, thereby increasing the gas pressure in the expansion tank; Step 3: When the partition moves, the second air inlet pipe automatically opens, and the nitrogen in the nitrogen tank simultaneously enters the expansion tank through the second air inlet pipe, thereby increasing the replenishment speed of the gas in the expansion tank.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up the air intake mechanism, the operation of the hydraulic cylinder drives the partition to move, and the partition moves downward to reduce the space in the expansion tank, thereby increasing the air pressure in the expansion tank and avoiding the occurrence of negative pressure. At the same time, when the partition moves downward, the second air intake pipe automatically opens, and the nitrogen in the nitrogen tank can enter the expansion tank through the second air intake pipe, which is convenient for increasing the air pressure in the expansion tank by reducing the space in the expansion tank through the displacement of the partition. At the same time, when the partition moves, the second air intake pipe is automatically opened, which increases the speed of replenishing the gas in the expansion tank, thereby avoiding the occurrence of negative pressure conditions in the expansion tank. 2. By setting the exhaust mechanism, when the partition is located at the top of the inner cavity of the expansion tank, the rotating cylinder contacts the rotating ring, and the rod is inserted into the slot to complete the docking of the rotating cylinder and the rotating ring. The motor drives the baffle to rotate, and the baffle rotates to open the exhaust pipe. The excess nitrogen in the expansion tank is discharged through the exhaust pipe. After the discharge, the exhaust pipe is closed through the baffle, which is convenient for discharging the nitrogen in the expansion tank when the air pressure in the expansion tank is high. The exhaust pipe can only be opened when the partition is located at the top of the expansion tank to prevent the exhaust pipe from opening when the expansion tank is in a negative pressure state, causing external air to enter the expansion tank, thereby affecting the quality of the heat transfer oil in the expansion tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is a cross-sectional view of an expansion tank of the present invention; Figure 3 is a cross-sectional view of a fixing seat of the present invention; Figure 4 is a cross-sectional view of the mounting seat of the present invention; Figure 5 It is a schematic diagram of the installation of the rotating plate of the present invention; Figure 6 It is a schematic diagram of the installation of the rotating ring of the present invention; Figure 7 is a cross-sectional view of the connecting pipe of the present invention; Figure 8 It is a schematic structural diagram of the rotating ring of the present invention.

[0018] In the figure: 1, expansion tank; 2, heat transfer oil pipeline; 3, mounting frame; 4, nitrogen tank; 5, air intake mechanism; 501, hydraulic cylinder; 502, partition; 503, movable pipe; 504, connecting pipe; 505, first air intake pipe; 506, vacuum pump; 507, second air intake pipe; 508, fixing seat; 509, block; 510, connecting spring; 511, mounting seat; 512, vertical plate; 513, through hole; 514, top plate; 51 5. Fixed plate; 516. Horizontal plate; 517. Rotating plate; 518. Connecting shaft; 519. Torsion spring; 520. Positioning plate; 6. Exhaust mechanism; 601. Exhaust pipe; 602. Baffle; 603. First bevel gear; 604. Second bevel gear; 605. Mounting shaft; 606. First spur gear; 607. Rotating cylinder; 608. Rotating ring; 609. Second spur gear; 610. Motor; 611. Insert rod; 612. Slot. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0021] See also Figures 1 to 8In an embodiment of the present invention, a device for pressurizing gas in an organic heat carrier heating system to improve thermal stability includes an expansion tank 1, a heat transfer oil pipeline 2 is fixedly connected to the bottom end of the expansion tank 1, a mounting frame 3 is provided on one side of the expansion tank 1, a nitrogen tank 4 is fixedly connected to the top end of the mounting frame 3, the nitrogen in the nitrogen tank 4 enters the expansion tank 1 through an air intake mechanism 5, and the excess nitrogen in the expansion tank 1 is discharged through an exhaust mechanism 6, the air intake mechanism 5 includes a hydraulic cylinder 501, the hydraulic cylinder 501 is installed at the top end of the expansion tank 1, and the output of the hydraulic cylinder 501 The end is connected with a partition 502, and the partition 502 is slidably connected to the inner wall of the expansion tank 1. The top of the partition 502 is fixedly connected with a movable pipe 503, and the inner wall of the movable pipe 503 is slidably connected with a connecting pipe 504. The outer wall of one side of the connecting pipe 504 is fixedly connected with a first air intake pipe 505 and a second air intake pipe 507. The first air intake pipe 505 is located above the second air intake pipe 507. The first air intake pipe 505 and the second air intake pipe 507 are both connected to the nitrogen tank 4. The outer wall of the first air intake pipe 505 is installed with a vacuum pump 506. The air intake mechanism The second air inlet pipe 507 further includes a fixing seat 508, which is fixedly connected to the top of one side of the movable pipe 503, and a block 509 extending from the fixing seat 508 is slidably connected inside the fixing seat 508, and a connecting spring 510 is connected between the block 509 and the fixing seat 508. The outer wall of the second air inlet pipe 507 is fixedly connected to a mounting seat 511, and the interior of the mounting seat 511 is slidably connected to a vertical plate 512 penetrating the mounting seat 511, and the outer wall of the vertical plate 512 is provided with a through hole 513, and the top of the vertical plate 512 is fixedly connected to a top plate 512. 14. A fixed plate 515 is fixedly connected to the bottom end of the mounting seat 511, a rotating plate 517 is rotatably connected to the bottom end of the vertical plate 512, a horizontal plate 516 is fixedly connected to the outer wall of the top plate 514 located above the rotating plate 517, the rotating plate 517 is rotatably connected to the vertical plate 512 via a connecting shaft 518, a torsion spring 519 is connected to the outer wall of the connecting shaft 518 between the rotating plate 517 and the vertical plate 512, a positioning plate 520 is fixedly connected to the outer wall of the rotating plate 517, and one end of the positioning plate 520 is in contact with the outer wall of the fixed plate 515.

[0022] In this embodiment: when the heat transfer oil in the expansion tank 1 is discharged, the vacuum pump 506 is started, and the vacuum pump 506 is operated to transport the nitrogen in the nitrogen tank 4 to the expansion tank 1 through the first air inlet pipe 505, the connecting pipe 504 and the movable pipe 503, so as to replenish the nitrogen in the expansion tank 1 and maintain the stability of the air pressure in the expansion tank 1; When the heat transfer oil in the expansion tank 1 is discharged too quickly and the vacuum pump 506 has no time to replenish it, the hydraulic cylinder 501 is started, and the operation of the hydraulic cylinder 501 drives the partition 502 to move, and the partition 502 moves downward to reduce the space in the expansion tank 1, thereby increasing the air pressure in the expansion tank 1 to avoid the occurrence of negative pressure. At the same time, when the partition 502 moves downward, the displacement of the partition 502 drives the movable tube 503 to move, the displacement of the movable tube 503 drives the fixed seat 508 to move, and the displacement of the fixed seat 508 drives the block 509 to move. At this time, one end of the positioning plate 520 is in contact with the fixed plate 515, so that the rotating plate 517 cannot be rotated. The block 509 moves downward and pushes the vertical plate 512 to move downward through the rotating plate 517 until the positioning plate 520 is separated from the fixed plate 515. At this time, the top plate 514 moves to the top of the mounting seat 511, and the through hole 513 moves into the second air inlet pipe 507, and the second air inlet pipe 507 is automatically opened. The partition 502 continues to move downward to push the rotating plate 517 to rotate and then separates from the rotating plate 517. The nitrogen in the nitrogen tank 4 can enter the expansion tank 1 through the second air inlet pipe 507, thereby improving the replenishment speed of the gas in the expansion tank 1. When the partition 502 is reset and moved to the top of the inner wall of the expansion tank 1, the displacement of the partition 502 drives the movable tube 503 to reset, thereby driving the fixed seat 508 and the block 509 to move upward, and the block 509 contacts the rotating plate 517 and is displaced by force until it is separated from the rotating plate 517. The block 509 is reset by the elastic force of the connecting spring 510, and the top of the block 509 contacts the horizontal plate 516, and the vertical plate 512 is pushed by the horizontal plate 516 to reset and move, so that the through hole 513 moves out of the second air inlet pipe 507, and the second air inlet pipe 507 is automatically closed, so that the air pressure in the expansion tank 1 is increased by reducing the space in the expansion tank 1 through the displacement of the partition 502. At the same time, when the partition 502 moves, the second air inlet pipe 507 is automatically opened, which increases the speed of replenishing the gas in the expansion tank 1, thereby avoiding the occurrence of negative pressure conditions in the expansion tank 1.

[0023] Please refer to Figures 6 to 8 The exhaust mechanism 6 includes an exhaust pipe 601, which is fixedly connected to the top of the connecting pipe 504. The inner wall of the exhaust pipe 601 is rotatably connected to a baffle 602, one end of the baffle 602 is fixedly connected to a first bevel gear 603, the interior of the exhaust pipe 601 is located on the outer wall of the first bevel gear 603 and is rotatably connected to a second bevel gear 604, the bottom end of the second bevel gear 604 is fixedly connected to a mounting shaft 605, the bottom end of the mounting shaft 605 is fixedly connected to a first spur gear 606, and the bottom end of the connecting pipe 504 is rotatably connected to the outer wall of the first bevel gear 603. It is rotatably connected to a rotating cylinder 607, the first spur gear 606 is in contact with the rotating cylinder 607, the interior of the partition 502 is rotatably connected to a rotating ring 608 extending to the inner cavity of the movable tube 503, the interior of the partition 502 is located on the outer wall of the rotating ring 608 and is rotatably connected to a second spur gear 609, a motor 610 is installed on the top of the partition 502, the output end of the motor 610 is connected to the second spur gear 609, the top of the rotating ring 608 is fixedly connected to an insert rod 611, and a slot 612 is provided at the bottom end of the rotating cylinder 607.

[0024] In this embodiment: when the air pressure in the expansion tank 1 is high and there is no time to discharge it through the vacuum pump 506, when the partition 502 is located at the top of the inner cavity of the expansion tank 1, the rotating cylinder 607 contacts the rotating ring 608, and the insertion rod 611 is inserted into the slot 612 to complete the docking of the rotating cylinder 607 and the rotating ring 608, and the motor 610 is started. The operation of the motor 610 drives the second spur gear 609 to rotate, and the second spur gear 609 rotates to drive the rotating ring 608 to rotate, and the rotating ring 608 rotates to drive the rotating cylinder 607 to rotate, and the rotating cylinder 607 rotates to drive the first spur gear 606 to rotate, and the first spur gear 606 rotates to drive the installation shaft 605 to rotate, and the installation shaft 605 rotates to drive the second bevel gear The wheel 604 rotates, the second bevel gear 604 rotates to drive the first bevel gear 603 to rotate, the first bevel gear 603 rotates to drive the baffle 602 to rotate, the baffle 602 rotates to open the exhaust pipe 601, and the excess nitrogen in the expansion tank 1 is discharged through the exhaust pipe 601. After the discharge, the exhaust pipe 601 is closed through the baffle 602, so that when the air pressure in the expansion tank 1 is high, the nitrogen in the expansion tank 1 can be discharged, and the exhaust pipe 601 can only be opened when the partition 502 is located at the top of the expansion tank 1, to prevent the exhaust pipe 601 from opening when the expansion tank 1 is in a negative pressure state, causing external air to enter the expansion tank 1, thereby affecting the quality of the heat transfer oil in the expansion tank 1.

[0025] Please refer to Figure 1 to Figure 2 The outer wall of the partition 502 is in contact with the inner wall of the expansion tank 1 , and the inner wall of the movable pipe 503 is in contact with the outer wall of the connecting pipe 504 .

[0026] In this embodiment, the operation of the hydraulic cylinder 501 drives the partition 502 to move, and the partition 502 moves downward to reduce the space in the expansion tank 1. At this time, the movable pipe 503 slides on the outer wall of the connecting pipe 504.

[0027] Please refer to Figures 2 to 5 One end of the block 509 is provided with an inclined surface, the shape of the block 509 is L-shaped, and the end of the positioning plate 520 facing the fixing plate 515 is flat.

[0028] In this embodiment: the displacement of the fixed seat 508 drives the block 509 to move, at this time, one end of the positioning plate 520 is in contact with the fixed plate 515, so that the rotating plate 517 cannot be rotated, and the block 509 moves downward to push the vertical plate 512 downward through the rotating plate 517 until the positioning plate 520 is separated from the fixed plate 515.

[0029] Please refer to Figures 6 to 8 The outer wall of the insertion rod 611 fits with the inner wall of the slot 612 .

[0030] In this embodiment, when the partition 502 is located at the top of the inner cavity of the expansion tank 1, the rotating cylinder 607 contacts the rotating ring 608, and the insertion rod 611 is inserted into the slot 612 to complete the docking of the rotating cylinder 607 and the rotating ring 608.

[0031] Please refer to Figures 6 to 8 A first tooth groove is formed on the outer wall of the rotating ring 608 , and the first tooth groove is meshed with the second spur gear 609 .

[0032] In this embodiment, the operation of the motor 610 drives the second spur gear 609 to rotate, and the rotation of the second spur gear 609 drives the rotating ring 608 to rotate.

[0033] Please refer to Figures 6 to 8 The first bevel gear 603 is meshed with the second bevel gear 604 , and a second tooth groove is formed on the outer wall of the rotating cylinder 607 , and the second tooth groove is meshed with the first spur gear 606 .

[0034] In this embodiment: the rotation of the rotating ring 608 drives the rotating cylinder 607 to rotate, the rotation of the rotating cylinder 607 drives the first spur gear 606 to rotate, the rotation of the first spur gear 606 drives the installation shaft 605 to rotate, the rotation of the installation shaft 605 drives the second bevel gear 604 to rotate, the rotation of the second bevel gear 604 drives the first bevel gear 603 to rotate, and the rotation of the first bevel gear 603 drives the baffle 602 to rotate.

[0035] A process for pressurizing the gas of an organic heat carrier heating system to improve thermal stability, the specific steps are as follows: Step 1: Start the vacuum pump 506. The vacuum pump 506 operates to transport the nitrogen in the nitrogen tank 4 to the expansion tank 1 through the first air inlet pipe 505, the connecting pipe 504 and the movable pipe 503; Step 2: When the gas vacuum pump 506 in the expansion tank 1 is too late to be replenished, the hydraulic cylinder 501 is started, and the operation of the hydraulic cylinder 501 drives the partition 502 to move, and the displacement of the partition 502 reduces the space in the expansion tank 1, thereby increasing the gas pressure in the expansion tank 1; Step 3: When the partition 502 moves, the second air inlet pipe 507 opens automatically, and the nitrogen in the nitrogen tank 4 simultaneously enters the expansion tank 1 through the second air inlet pipe 507, thereby increasing the replenishment speed of the gas in the expansion tank 1.

[0036] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for pressurizing gas in an organic heat carrier heating system to improve thermal stability, comprising an expansion tank (1), the bottom end of the expansion tank (1) being fixedly connected to a heat transfer oil pipeline (2), a mounting frame (3) being provided on one side of the expansion tank (1), the top end of the mounting frame (3) being fixedly connected to a nitrogen tank (4), characterized in that: The nitrogen in the nitrogen tank (4) enters the expansion tank (1) through the air intake mechanism (5), and the excess nitrogen in the expansion tank (1) is discharged through the exhaust mechanism (6); The air intake mechanism (5) comprises a hydraulic cylinder (501), the hydraulic cylinder (501) being mounted on the top end of the expansion tank (1), the output end of the hydraulic cylinder (501) being connected to a partition (502), the partition (502) being slidably connected to the inner wall of the expansion tank (1), the top end of the partition (502) being fixedly connected to a movable tube (503), the inner wall of the movable tube (503) being slidably connected to a connecting tube (504), one side outer wall of the connecting tube (504) being fixedly connected to a first air intake pipe (505) and a second air intake pipe (507), the first air intake pipe (505) being located above the second air intake pipe (507), the first air intake pipe (505) and the second air intake pipe (507) being both connected to the nitrogen tank (4), and a vacuum pump (506) being mounted on the outer wall of the first air intake pipe (505).

2. The device for pressurizing gas in an organic heat carrier heating system to improve thermal stability according to claim 1, characterized in that: The air intake mechanism (5) further comprises a fixing seat (508), wherein the fixing seat (508) is fixedly connected to a top end of one side of the movable tube (503), a clamping block (509) extending from the fixing seat (508) is slidably connected inside the fixing seat (508), a connecting spring (510) is connected between the clamping block (509) and the fixing seat (508), an outer wall of the second air intake pipe (507) is fixedly connected to a mounting seat (511), the inner wall of the mounting seat (511) is slidably connected to a vertical plate (512) penetrating the mounting seat (511), a through hole (513) is provided on the outer wall of the vertical plate (512), and a top plate is fixedly connected to the top end of the vertical plate (512). (514), the bottom end of the mounting seat (511) is fixedly connected to a fixed plate (515), the bottom end of the vertical plate (512) is rotatably connected to a rotating plate (517), the outer wall of the top plate (514) is located above the rotating plate (517) and is fixedly connected to a horizontal plate (516), the rotating plate (517) is rotatably connected to the vertical plate (512) via a connecting shaft (518), a torsion spring (519) is connected to the outer wall of the connecting shaft (518) between the rotating plate (517) and the vertical plate (512), the outer wall of the rotating plate (517) is fixedly connected to a positioning plate (520), and one end of the positioning plate (520) is in contact with the outer wall of the fixed plate (515).

3. The device for pressurizing gas in an organic heat carrier heating system to improve thermal stability according to claim 2, characterized in that: The exhaust mechanism (6) comprises an exhaust pipe (601), the exhaust pipe (601) is fixedly connected to the top end of the connecting pipe (504), the inner wall of the exhaust pipe (601) is rotatably connected to a baffle (602), one end of the baffle (602) is fixedly connected to a first bevel gear (603), the interior of the exhaust pipe (601) is located on the outer wall of the first bevel gear (603) and is rotatably connected to a second bevel gear (604), the bottom end of the second bevel gear (604) is fixedly connected to a mounting shaft (605), the bottom end of the mounting shaft (605) is fixedly connected to a first spur gear (606), the bottom end of the connecting pipe (504) is rotatably connected to A rotating cylinder (607) is provided, the first spur gear (606) is in contact with the rotating cylinder (607), the interior of the partition (502) is rotatably connected to a rotating ring (608) extending to the inner cavity of the movable tube (503), the interior of the partition (502) is rotatably connected to the outer wall of the rotating ring (608) and the second spur gear (609), a motor (610) is installed at the top of the partition (502), the output end of the motor (610) is connected to the second spur gear (609), the top of the rotating ring (608) is fixedly connected to an insertion rod (611), and a slot (612) is provided at the bottom of the rotating cylinder (607).

4. The device for pressurizing gas in an organic heat carrier heating system to improve thermal stability according to claim 2, characterized in that: The outer wall of the partition (502) fits with the inner wall of the expansion tank (1), and the inner wall of the movable tube (503) fits with the outer wall of the connecting tube (504).

5. The device for pressurizing gas in an organic heat carrier heating system to improve thermal stability according to claim 2, characterized in that: One end of the clamping block (509) is provided with an inclined surface, and the clamping block (509) is in an L-shape.

6. The device for pressurizing gas in an organic heat carrier heating system to improve thermal stability according to claim 2, characterized in that: One end of the positioning plate (520) facing the fixing plate (515) is planar.

7. The device for pressurizing gas in an organic heat carrier heating system to improve thermal stability according to claim 3, characterized in that: The outer wall of the insertion rod (611) fits into the inner wall of the slot (612).

8. The device for pressurizing gas in an organic heat carrier heating system to improve thermal stability according to claim 3, characterized in that: The outer wall of the rotating ring (608) is provided with a first tooth groove, and the first tooth groove is meshed with the second spur gear (609).

9. The device for pressurizing gas in an organic heat carrier heating system to improve thermal stability according to claim 3, characterized in that: The first bevel gear (603) meshes with the second bevel gear (604), and a second tooth groove is formed on the outer wall of the rotating cylinder (607), and the second tooth groove meshes with the first spur gear (606).

10. A process for pressurizing the gas in an organic heat carrier heating system to improve thermal stability, characterized in that: The specific steps are as follows: Step 1: Start the vacuum pump (506), which operates to transport the nitrogen in the nitrogen tank (4) through the first air inlet pipe (505), the connecting pipe (504) and the movable pipe (503) to the expansion tank (1); Step 2: When the gas vacuum pump (506) in the expansion tank (1) is unable to be replenished in time, the hydraulic cylinder (501) is started, and the operation of the hydraulic cylinder (501) drives the partition (502) to move, and the displacement of the partition (502) reduces the space in the expansion tank (1), thereby increasing the gas pressure in the expansion tank (1); Step 3: When the partition (502) moves, the second air inlet pipe (507) automatically opens, and the nitrogen in the nitrogen tank (4) simultaneously enters the expansion tank (1) through the second air inlet pipe (507), thereby increasing the speed of replenishing the gas in the expansion tank (1).

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