Heat-insulation protective high-temperature-resistant expansion valve

Abstract

The invention relates to the field of expansion valves, in particular to a heat-insulation protective high-temperature-resistant expansion valve. The device comprises a valve body, a bearing plate is fixedly connected to the outer side of the valve body, a plurality of liquid storage tanks are fixedly connected to the upper surface of the bearing plate, liquid storage bins are formed in the inner walls of the liquid storage tanks, a protective shell is fixedly installed on the portion, on the upper surface of the bearing plate, between the liquid storage tanks, and the protective shell is attached to the valve body; by the adoption of the multi-layer heat insulation design, the protective shell is attached to the valve body, the protective shell has a certain heat insulation effect on the outer wall of the valve body, cooling water is contained in the protective shell, external heat is further blocked through the cooling water in the protective shell, and then double heat insulation barriers are formed; the cooling water can absorb and take away part of heat, so that the temperature around the valve body is kept relatively stable, the influence of the external high-temperature environment on the valve body can be effectively reduced, and the situation that the service life of the valve body is affected due to the fact that the external temperature of the valve body is too high or fluctuates too much is avoided.

Description

Technical Field

[0001] The invention relates to the field of expansion valves, in particular to a heat-insulating, protective, high-temperature resistant expansion valve. Background Art

[0002] An expansion valve, also known as a throttle valve or expander, is a device that adjusts the refrigerant flow rate by changing the cross-sectional area of ​​the channel. It is mainly installed between the liquid storage cylinder and the evaporator to reduce the pressure of high-pressure liquid refrigerant to low-pressure wet steam to meet the needs of refrigerant evaporation in the evaporator. At the same time, the expansion valve can also automatically adjust the valve opening according to the temperature and pressure changes at the evaporator outlet to ensure the efficient and stable operation of the refrigeration system. Therefore, it is widely used in refrigeration, air conditioning, refrigeration and other fields and is an indispensable part of the refrigeration system.

[0003] At present, the expansion valve is an important component in the refrigeration system. Therefore, its application range is very wide. In different application scenarios, for example, in industrial refrigeration, the expansion valve will be in a high temperature environment. However, the internal components of the expansion valve are all metal components, and metal materials will expand and contract at high temperatures. This physical change may cause the fitting clearance of the internal components of the expansion valve to change, thereby affecting its sealing and adjustment accuracy. For example, the metal components such as the valve body and valve stem of the expansion valve work at high temperature for a long time, and the metal material will undergo thermal creep, which will cause the fitting clearance between the valve stem and the valve body to become larger, affecting the sealing performance of the expansion valve, causing refrigerant leakage, and thus reducing the service life of the expansion valve. Summary of the invention

[0004] The object of the present invention is to provide a heat-insulating and high-temperature resistant expansion valve to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention aims to provide a heat-insulating, protective and high-temperature resistant expansion valve, including a valve body, a bearing plate is fixedly connected to the outer side of the valve body, a plurality of liquid storage tanks are fixedly connected to the upper surface of the bearing plate, and the inner walls of the plurality of liquid storage tanks are provided with liquid storage bins, a protective shell is fixedly installed on the upper surface of the bearing plate between the plurality of liquid storage tanks, and the protective shell is fitted with the valve body, a plurality of supporting springs are fixedly connected to the inner lower surface of the protective shell, a piston plate is fixedly connected between the ends of the plurality of supporting springs, and the outer side of the piston plate is in contact with the inner side of the protective shell, a plurality of connecting pipes A are connected to the inner wall of the piston plate, a card block is provided inside the connecting pipe A, and the surface area of ​​the card block is larger than the diameter of the bottom opening of the connecting pipe A, and a bracket is fixedly connected to the top end of the connecting pipe A, and the diameter of the top opening of the bracket is the same as the diameter of the bottom opening of the connecting pipe A.

[0006] As a further improvement of the technical solution, multiple connecting pipes B are connected between the liquid storage tanks and the inner walls of the protective shells, one ends of multiple connecting pipes B are provided with one-way valves A inside the liquid storage tanks, the other ends of multiple connecting pipes B are fixedly connected to connecting cylinders inside the protective shell, the inner sides of the connecting cylinders are fixedly connected to support plates, the inner walls of the support plates are slidably connected to multiple limit rods A, one ends of multiple limit rods A are fixedly connected to limit blocks A, baffles are fixedly connected between the other ends of multiple limit rods A, the outer walls of the baffles are fixedly connected to tension springs, and the ends of the tension springs are fixedly connected to the inner walls of the support plates.

[0007] As a further improvement of the present technical solution, movable bins are provided on the inner walls of the liquid storage tank on both sides near the liquid storage bin, and a rotating rod is rotatably connected between the two movable bins and the inner walls of the liquid storage bin, and a water wheel is fixedly connected to the outer wall of the rotating rod, and gears are fixedly connected to the two movable bins at both ends, and racks A and racks B are respectively meshed on the outer edges of the two gears, and the outer walls of multiple racks A and racks B are slidably connected to the inner wall of the movable bin, and the bottom ends of multiple racks A are fixedly connected to reset springs, and the ends of the reset springs are fixedly connected to fixed blocks, and the outer sides of the fixed blocks are fixedly connected to the inner side of the movable bin.

[0008] As a further improvement of the technical solution, a cross frame A is fixedly connected between the top ends of the two racks B, an L-shaped bracket is fixedly connected to the outer wall of the cross frame A, one end of the L-shaped bracket is fixedly connected to a U-shaped frame, and the outer walls of the U-shaped frames are slidably connected to the inner wall of the protective shell, a cross frame B is fixedly connected between the top ends of the two racks A, an L-shaped connecting rod is fixedly connected to one side of the cross frame B, and the outer wall of the L-shaped connecting rod is slidably connected to the inner wall of the liquid storage tank.

[0009] As a further improvement of the present technical solution, a piston assembly is provided at the bottom end of the L-shaped connecting rod inside the liquid storage tank, and the piston assembly includes a mounting seat, the upper surface of the mounting seat is fixedly connected to the bottom end of the L-shaped connecting rod, and the outer side of the mounting seat is in contact with the inner side of the liquid storage tank, and the inner wall of the mounting seat is symmetrically provided with two movable grooves, the bottom ends of the two movable grooves are fixedly connected to a clamping seat on the outer wall of the mounting seat, and the inner sides of the two clamping seats are clamped with clamping plates, the outer walls of the two clamping plates are fixedly connected to multiple memory springs, and the ends of the multiple memory springs are fixedly connected to the inner side of the mounting seat.

[0010] As a further improvement of the present technical solution, the outer walls of the two clamps are fixedly connected with a plurality of limit rods B, the outer walls of the plurality of limit rods B are slidably connected with the inner walls of the mounting seat, and the ends of the plurality of limit rods B are fixedly connected with the limit blocks B.

[0011] As a further improvement of the present technical solution, a guide plate is provided below the end of the one-way valve A, and a port of the guide plate is close to the blade of the water wheel at the position biased toward the rack A.

[0012] As a further improvement of the technical solution, an annular seat is provided on the inner side of the protective shell, and the annular seat is located below the piston plate.

[0013] As a further improvement of the technical solution, a connecting pipe C is connected between the protective shell and the inner walls of multiple liquid storage tanks, and the connecting pipe C is located below the annular seat, and one end of the multiple connecting pipes C is provided with a one-way valve B inside the protective shell.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By adopting a multi-layer insulation design and utilizing the fit between the protective shell and the valve body, the protective shell itself can play a certain role in heat insulation for the outer wall of the valve body. At the same time, cooling water is installed inside the liquid storage tank and the protective shell, and the cooling water inside the protective shell further blocks the external heat, thereby forming a double insulation barrier. The cooling water can absorb and take away part of the heat, so that the temperature around the valve body remains relatively stable, thereby effectively reducing the impact of the external high temperature environment on the valve body, and avoiding affecting the service life of the valve body due to excessively high or large fluctuations in the external temperature of the valve body.

[0015] 2. By heating up the cooling water inside the protective shell, the cooling water inside the protective shell can enter the liquid storage tank through the connecting pipe B, so that the cooling water contacts the blades of the water wheel, so that the water wheel drives the gear to rotate through the rotating rod, and then the gear meshes with the rack A and the rack B, so that the rack A and the rack B move in relative directions. When the rack B moves, the U-shaped frame drives the piston plate to rise, so that the cooling water inside the protective shell can gradually enter the liquid storage tank through the connecting pipe B. When the rack A moves, the L-shaped connecting rod drives the mounting seat to press down, so that the cooling water inside the liquid storage tank flows into the protective shell through the connecting pipe C, thereby completing the conversion of the cooling water inside the protective shell, and then the protective shell can automatically complete the conversion of the cooling water inside the protective shell through the temperature change of the internal cooling water, thereby maintaining the stability of the thermal insulation protection effect of the protective shell on the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the heat insulation mechanism of the present invention; Figure 3 This is a schematic diagram of the internal structure of the protective shell of the present invention; Figure 4 This is a schematic diagram of the internal structure of the protective shell of the present invention; Figure 5 It is a schematic diagram of the support structure of the present invention; Figure 6 This is a schematic diagram of the internal structure of the connecting pipe A of the present invention; Figure 7 It is a schematic diagram of the internal structure distribution of the liquid storage tank of the present invention; Figure 8 It is a schematic diagram of the internal structure of the liquid storage tank of the present invention; Fig. 9 It is a schematic diagram of the structure of the pressure drive mechanism of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the piston assembly of the present invention; Fig.11 It is a three-dimensional structural schematic diagram of the piston assembly of the present invention from another perspective; Fig.12 It is a schematic diagram of the internal structure of the connecting tube of the present invention.

[0017] The meaning of each number in the figure is: 1. Valve body; 2. Carrying plate; 3. Liquid storage tank; 31. Liquid storage tank; 32. One-way valve A; 301. Movable tank; 302. Rotating rod; 303. Water wheel; 304. Gear; 305. Rack A; 306. Rack B; 307. Return spring; 308. Fixed block; 4. Protective shell; 401. Support spring; 402. Piston plate; 403. Connecting pipe A; 404. Block; 405. Bracket; 5. Connecting pipe B; 501. Connecting tube; 502. Support plate; 503, limit rod A; 504, limit block A; 505, baffle; 506, tension spring; 6, cross frame A; 601, L-shaped bracket; 602, U-shaped frame; 603, cross frame B; 604, L-shaped connecting rod; 7, piston assembly; 701, mounting seat; 702, movable groove; 703, clamping seat; 704, clamping plate; 705, memory spring; 8, limit rod B; 801, limit block B; 9, guide plate; 10, annular seat; 11, connecting pipe C; 12, one-way valve B. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Fig.12 As shown, the purpose of this embodiment is to provide a heat-insulating, protective and high-temperature resistant expansion valve, including a valve body 1, a bearing plate 2 is fixedly connected to the outer side of the valve body 1, a plurality of liquid storage tanks 3 are fixedly connected to the upper surface of the bearing plate 2, and the inner walls of the plurality of liquid storage tanks 3 are all provided with liquid storage bins 31, and a protective shell 4 is fixedly installed between the plurality of liquid storage tanks 3 on the upper surface of the bearing plate 2, and the protective shell 4 is in contact with the valve body 1, and a plurality of supporting springs 401 are fixedly connected to the inner lower surface of the protective shell 4, a piston plate 402 is fixedly connected between the ends of the plurality of supporting springs 401, and the outer side of the piston plate 402 is in contact with the inner side of the protective shell 4, and the inner wall of the piston plate 402 is connected to a plurality of connecting pipes A403, a block 404 is arranged inside the connecting pipe A403, and the surface area of ​​the block 404 is larger than the caliber of the bottom opening of the connecting pipe A403, and a bracket 405 is fixedly connected to the top of the connecting pipe A403, and the bracket 40 The caliber of the top opening of 5 is the same as the caliber of the bottom opening of the connecting pipe A403; a connecting pipe B5 is connected between the inner walls of the multiple liquid storage tanks 3 and the protective shell 4, one end of the multiple connecting pipes B5 is provided with a one-way valve A32 inside the liquid storage tank 31, and the other end of the multiple connecting pipes B5 is fixedly connected to a connecting cylinder 501 inside the protective shell 4, the inner side of the connecting cylinder 501 is fixedly connected to a support plate 502, the inner wall of the support plate 502 is slidably connected with a plurality of limit rods A503, one end of the multiple limit rods A503 is fixedly connected to a limit block A504, and the other ends of the multiple limit rods A503 are fixedly connected between baffles 505, the outer wall of the baffle 505 is fixedly connected with a tension spring 506, and the end of the tension spring 506 is fixedly connected to the inner wall of the support plate 502; an annular seat 10 is provided on the inner side of the protective shell 4, and the annular seat 10 is located below the piston plate 402.

[0020] In this embodiment, the protective shell 4 is fitted with the valve body 1. By adopting a multi-layer insulation design and utilizing the fit of the protective shell 4 with the valve body 1, the protective shell 4 itself can play a certain role in heat insulation for the outer wall of the valve body 1. At the same time, cooling water is installed inside the liquid storage tank 3 and the protective shell 4. The cooling water inside the protective shell 4 further blocks the external heat, thereby forming a double insulation barrier. The cooling water can absorb and take away part of the heat, so that the temperature around the valve body 1 remains relatively stable, thereby effectively reducing the impact of the external high temperature environment on the valve body 1, and avoiding the service life of the valve body 1 being affected by excessively high or large fluctuations in the external temperature of the valve body 1. The tension of the support spring A401 is smaller than the tension of the return spring 307. The annular seat 10 provided inside the protective shell 4 is used to support and limit the piston plate 402. By setting the surface area of ​​the clamping block 404 to be larger than the diameter of the opening at the bottom end of the connecting pipe A403, the clamping block 404 will block the bottom end of the connecting pipe A403, thereby blocking the cooling water above the piston plate 402. When the protective shell 4 works in a high-temperature environment for a long time, if the cooling water inside the protective shell 4 is affected by the high-temperature environment and causes the temperature to rise, the pressure inside the protective shell 4 will increase, and then under the influence of the pressure, the baffle 505 will be forced to move toward the port away from the connecting tube 501, and then the tension spring 506 will be forced to be compressed. At the same time, the movement of the baffle 505 is limited by the limit rod A503, thereby ensuring the stability of the baffle 505 when moving. When the baffle 505 is away from the port of the connecting tube 501, the cooling water inside the protective shell 4 will be able to enter the connecting pipe B5 through the inside of the connecting tube 501, and after passing through the connecting pipe B5, it will enter the guide plate 9 from the one-way valve, and then flow from the port of the guide plate 9 to the inside of the liquid storage tank 3, thereby recovering the cooling water after the temperature rises.

[0021] In this embodiment, Figure 2 , Figure 3 , Figure 7 , Figure 8 and Fig. 9 As shown, a guide plate 9 is arranged below the end of the one-way valve A32, and the port of the guide plate 9 is close to the blade of the water wheel 303 at the deflection rack A305; movable bins 301 are opened on the inner wall of the liquid storage tank 3 on both sides close to the liquid storage bin 31, and a rotating rod 302 is rotatably connected between the two movable bins 301 and the inner wall of the liquid storage bin 31, and the outer wall of the rotating rod 302 is fixedly connected to the water wheel 303, and the two ends of the rotating rod 302 are respectively fixedly connected to gears 304 inside the two movable bins 301, and the outer edges of the two gears 304 are respectively meshed with racks A305 and racks B306, and the outer walls of multiple racks A305 and racks B306 are slidably connected to the inner wall of the movable bin 301, and multiple The bottom ends of the racks A305 are fixedly connected with reset springs 307, the ends of the reset springs 307 are fixedly connected with fixed blocks 308, and the outer sides of the fixed blocks 308 are fixedly connected with the inner sides of the movable bin 301; a cross frame A6 is fixedly connected between the top ends of the two racks B306, an L-shaped bracket 601 is fixedly connected to the outer wall of the cross frame A6, one end of the L-shaped bracket 601 is fixedly connected to a U-shaped frame 602, and the outer walls of the U-shaped frame 602 are slidably connected to the inner wall of the protective shell 4, a cross frame B603 is fixedly connected between the top ends of the two racks A305, an L-shaped connecting rod 604 is fixedly connected to one side of the cross frame B603, and the outer wall of the L-shaped connecting rod 604 is slidably connected to the inner wall of the liquid storage tank 3.

[0022] In this embodiment, when the cooling water flows from the port of the guide plate 9 to the inside of the liquid storage tank 3, it will contact the blades of the water wheel 303, so that the water wheel 303 drives the rotating rod 302 to rotate, and the cooling water will fall on the top of the mounting seat 701 under the traction of the water wheel 303, thereby applying pressure to the mounting seat 701, and when the rotating rod 302 rotates, it will drive the gear 304 to rotate, and then the rotating gear 304 will mesh with the rack A305 and the rack B306, and then drive the rack A305 and the rack B306 to move in relative directions, wherein the rack A305 will drive the L-shaped connecting rod 604 to move downward synchronously through the cross frame B603 when moving, so that the L-shaped connecting rod 604 further applies pressure to the mounting seat 701, thereby, between the L-shaped connecting rod 604 and the cooling water. Under the multiple pressures of cooling water, the mounting seat 701 can apply sufficient force to the reset spring 307 through the rack A305, so that the reset spring 307 is forced to contract. In addition, the rack B306 will drive the L-shaped bracket 601 to rise synchronously through the cross frame A6 when moving, and then the rising L-shaped bracket 601 will drive the piston plate 402 to rise synchronously inside the protective shell 4 through the U-shaped frame 602, thereby increasing the pressure in the internal space of the protective shell 4, thereby accelerating the flow rate of cooling water through the connecting tube 501 to the inside of the liquid storage tank 3, thereby accelerating the efficiency of recovering the heated cooling water, and also increasing the flow rate of the cooling water, so that the impact force on the water wheel 303 is enhanced, so that the water wheel 303 can drive the rotating rod 302 to generate a greater force.

[0023] In this embodiment, Figure 4 , Fig.10 , Fig.11 As shown, the bottom end of the L-shaped connecting rod 604 is provided with a piston assembly 7 inside the liquid storage tank 31, and the piston assembly 7 includes a mounting seat 701, the upper surface of the mounting seat 701 is fixedly connected to the bottom end of the L-shaped connecting rod 604, and the outer side of the mounting seat 701 is in conflict with the inner side of the liquid storage tank 31, and the inner wall of the mounting seat 701 is symmetrically provided with two movable grooves 702, and the bottom ends of the two movable grooves 702 are fixedly connected with a clamping seat 703 on the outer wall of the mounting seat 701, and the inner sides of the two clamping seats 703 are clamped with a clamping plate 704, and the outer walls of the two clamping plates 704 are fixedly connected with a plurality of Memory spring 705, and the ends of multiple memory springs 705 are fixedly connected to the inner side of the mounting seat 701; the outer walls of the two clamping plates 704 are fixedly connected with multiple limit rods B8, the outer walls of the multiple limit rods B8 are slidably connected to the inner wall of the mounting seat 701, and the ends of the multiple limit rods B8 are fixedly connected with the limit blocks B801; the protective shell 4 and the inner walls of the multiple liquid storage tanks 31 are connected by connecting pipes C11, and the connecting pipes C11 are located below the annular seat 10, and one end of the multiple connecting pipes C11 is provided with a one-way valve B12 inside the protective shell 4.

[0024] In this embodiment, the surface area of ​​the card plate 704 is larger than the caliber of the movable groove 702, and through the clamping connection between the clamping seat 703 and the card plate 704, when the mounting seat 701 moves downward under the pressure of the L-shaped connecting rod 604, the card plate 704 will fit tightly with the movable groove 702, thereby ensuring the sealing of the mounting seat 701, so that during the downward movement of the mounting seat 701, the pressure inside the liquid storage tank 3 will be increased, and the cooling water inside the liquid storage tank 3 will flow into the interior of the protective shell 4 from the port of the one-way valve B12 through the connecting pipe C11, thereby completing the conversion of cold and hot media between the liquid storage tank 3 and the interior of the protective shell 4, and the one-way valve B12 set at the end of the connecting pipe C11 is used to prevent the cooling water from flowing back when entering the interior of the protective shell 4.

[0025] In summary, the working principle of the present invention is as follows: Firstly, by adopting a multi-layer heat-insulating design and utilizing the fit between the protective shell 4 and the valve body 1, the protective shell 4 itself can play a certain role in heat-insulating the outer wall of the valve body 1. At the same time, the interior of the liquid storage tank 3 and the protective shell 4 are both filled with cooling water, and the cooling water inside the protective shell 4 can further block the external heat, thereby forming a double heat-insulating barrier. The cooling water can absorb and take away part of the heat, so that the temperature around the valve body 1 remains relatively stable, thereby effectively reducing the impact of the external high-temperature environment on the valve body 1, and avoiding the service life of the valve body 1 being affected by the excessively high or excessively fluctuating external temperature of the valve body 1. In addition, when the protective shell 4 works in a high-temperature environment for a long time, if the cooling water inside the protective shell 4 is affected by the high-temperature environment and causes the temperature to rise, the protective shell 4 will The pressure inside the protective shell 4 increases, and then under the influence of the pressure, the baffle 505 is forced to move toward the port away from the connecting tube 501, and then the tension spring 506 is forced to compress. At the same time, the movement of the baffle 505 is limited by the limit rod A503, thereby ensuring the stability of the baffle 505 when moving. When the baffle 505 is away from the port of the connecting tube 501, the cooling water inside the protective shell 4 can enter the connecting pipe B5 through the inside of the connecting tube 501, and after passing through the connecting pipe B5, it enters the guide plate 9 from the one-way valve, and then flows from the port of the guide plate 9 to the inside of the liquid storage tank 3, thereby playing a role in recovering the cooling water after heating, and when the cooling water flows to the inside of the liquid storage tank 3, it will be in contact with the water wheel 30. 3, so that the water wheel 303 drives the rotating rod 302 to rotate, and the cooling water will fall on the top of the mounting seat 701 under the traction of the water wheel 303, so as to apply pressure to the mounting seat 701, and when the rotating rod 302 rotates, it will drive the gear 304 to rotate, and then the rotating gear 304 will mesh with the rack A305 and the rack B306, and then drive the rack A305 and the rack B306 to move in relative directions, wherein the rack A305 will drive the L-shaped connecting rod 604 to move downward synchronously through the cross frame B603 when moving, so that the L-shaped connecting rod 604 further presses the mounting seat 701, so that, under the multiple pressures of the L-shaped connecting rod 604 and the cooling water, the mounting seat 701 can be moved by the rack A305. Sufficient force is applied to the return spring 307 to make the return spring 307 contract under the force. During the downward pressing process of the mounting seat 701, since the surface area of ​​the clamping plate 704 is larger than the diameter of the movable groove 702, the clamping plate 704 is clamped with the movable groove 702 to ensure the sealing of the mounting seat 701. As a result, during the downward movement of the mounting seat 701, the pressure inside the liquid storage tank 3 is increased, and the cooling water inside the liquid storage tank 3 flows into the inside of the protective shell 4 from the port of the one-way valve B12 through the connecting pipe C11, thereby completing the conversion of the cold and hot media between the liquid storage tank 3 and the inside of the protective shell 4.The one-way valve B12 provided at the end of the connecting pipe C11 is used to prevent the cooling water from flowing back when entering the protective shell 4. In addition, when the rack B306 moves, it will drive the L-shaped bracket 601 to rise synchronously through the cross frame A6, and then the rising L-shaped bracket 601 will drive the piston plate 402 to rise synchronously inside the protective shell 4 through the U-shaped frame 602, thereby increasing the pressure in the internal space of the protective shell 4, thereby accelerating the flow rate of the cooling water flowing to the inside of the liquid storage tank 3 through the connecting tube 501, thereby accelerating the efficiency of recovering the heated cooling water, and also increasing the flow rate of the cooling water to enhance the impact force on the water wheel 303, so that the water wheel 303 can drive the rotating rod 3 02 generates a greater force. Finally, after the conversion of the cold and hot media between the protective shell 4 and the inside of the valve body 1 is completed, the air pressure inside the protective shell 4 will return to its original state. As the air pressure inside the protective shell 4 decreases, the force on the tension spring 506 will be reduced. Subsequently, the elastic force of the tension spring 506 pushes the baffle 505 to fit with the opening of the connecting tube 501, thereby preventing the converted cooling water from continuing to flow into the liquid storage tank 3 through the connecting pipe B5. Then, when cooling water no longer flows into the liquid storage tank 3, the water wheel 303 will not generate a force under the impact of the water flow, thereby reducing the force on the reset spring 307. Subsequently, the rack A305 is pushed by the tension of the reset spring 307. When the mounting seat 701 is lifted up, the rack A305 will move up to the initial position, and the rack A305 will drive the mounting seat 701 to rise synchronously when it moves up. When the mounting seat 701 is lifted up, it will be affected by the water pressure, which will cause the clamping plate 704 to disengage from the clamping seat 703, so that the movable groove 702 can expose the opening, and the opening of the movable groove 702 is exposed, which can relieve the pressure encountered when the mounting seat 701 is lifted up, so that the mounting seat 701 can restore to the initial position under the drive of the L-shaped connecting rod 604, and the rack A305 will mesh with the gear 304 while rising, so that the rack B306 can drive the L-shaped bracket 601 to be pressed down synchronously through the cross frame A6, and the L-shaped bracket 601 will pass through the U-shaped frame while being pressed down. 602 drives the piston plate 402 to move downward inside the protective shell 4. When the piston plate 402 moves downward, the block 404 will be affected by the cooling water pressure and detach from the bottom opening of the connecting pipe A403. Then, the gap between the block 404 and the bracket 405 reduces the pressure on the piston plate 402 when it is pressed downward, so that the U-shaped frame 602 can generate enough force to move the piston plate 402 downward, so that the piston plate 402 can restore its initial position under the push of the U-shaped frame 602, so that the protective shell 4 can automatically complete the conversion of the cooling water inside the protective shell 4 through the temperature change of the internal cooling water, so that the heat insulation protection effect of the protective shell 4 on the valve body 1 can maintain relative stability.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A heat-insulating and high-temperature resistant expansion valve, characterized in that: The invention comprises a valve body (1), the outer side of the valve body (1) is fixedly connected to a bearing plate (2), the upper surface of the bearing plate (2) is fixedly connected to a plurality of liquid storage tanks (3), the inner walls of the plurality of liquid storage tanks (3) are each provided with a liquid storage bin (31), a protective shell (4) is fixedly installed on the upper surface of the bearing plate (2) between the plurality of liquid storage tanks (3), and the protective shell (4) is fitted with the valve body (1), a plurality of support springs (401) are fixedly connected to the inner lower surface of the protective shell (4), and the ends of the plurality of support springs (401) are fixedly connected to each other. A piston plate (402) is provided, and the outer side of the piston plate (402) contacts the inner side of the protective shell (4); the inner wall of the piston plate (402) is connected to a plurality of connecting tubes A (403); a clamping block (404) is provided inside the connecting tube A (403); the surface area of ​​the clamping block (404) is larger than the diameter of the bottom opening of the connecting tube A (403); the top end of the connecting tube A (403) is fixedly connected to a bracket (405); the diameter of the top opening of the bracket (405) is the same as the diameter of the bottom opening of the connecting tube A (403).

2. A heat-insulating and high-temperature resistant expansion valve according to claim 1, characterized in that: A connecting pipe B (5) is connected between the plurality of liquid storage tanks (3) and the inner wall of the protective shell (4); one end of the plurality of connecting pipes B (5) is provided with a one-way valve A (32) inside the liquid storage tank (31); the other end of the plurality of connecting pipes B (5) is fixedly connected to a connecting cylinder (501) inside the protective shell (4); the inner side of the connecting cylinder (501) is fixedly connected to a support plate (502); the inner wall of the support plate (502) is slidably connected to a plurality of limit rods A (503); one end of the plurality of limit rods A (503) is fixedly connected to a limit block A (504); a baffle (505) is fixedly connected between the other ends of the plurality of limit rods A (503); the outer wall of the baffle (505) is fixedly connected to a tension spring (506); and the end of the tension spring (506) is fixedly connected to the inner wall of the support plate (502).

3. The heat-insulating and high-temperature resistant expansion valve according to claim 1, characterized in that: Active bins (301) are provided on the inner wall of the liquid storage tank (3) on both sides close to the liquid storage bin (31), and a rotating rod (302) is rotatably connected between the two active bins (301) and the inner wall of the liquid storage bin (31), a water wheel (303) is fixedly connected to the outer wall of the rotating rod (302), and gears (304) are fixedly connected at both ends of the rotating rod (302) inside the two active bins (301), and the outer edges of the two gears (304) are A rack A (305) and a rack B (306) are respectively meshed, and the outer walls of the plurality of racks A (305) and the rack B (306) are slidably connected to the inner wall of the movable bin (301), and the bottom ends of the plurality of racks A (305) are fixedly connected to a return spring (307), and the ends of the return springs (307) are fixedly connected to a fixed block (308), and the outer sides of the fixed blocks (308) are fixedly connected to the inner side of the movable bin (301).

4. The heat-insulating and high-temperature-resistant expansion valve according to claim 3 is characterized in that: A cross frame A (6) is fixedly connected between the top ends of the two racks B (306), an L-shaped bracket (601) is fixedly connected to the outer wall of the cross frame A (6), one end of the L-shaped bracket (601) is fixedly connected to a U-shaped frame (602), and the outer wall of the U-shaped frame (602) is slidably connected to the inner wall of the protective shell (4), a cross frame B (603) is fixedly connected between the top ends of the two racks A (305), one side of the cross frame B (603) is fixedly connected to an L-shaped connecting rod (604), and the outer wall of the L-shaped connecting rod (604) is slidably connected to the inner wall of the liquid storage tank (3).

5. The heat-insulating and high-temperature-resistant expansion valve according to claim 4, characterized in that: The bottom end of the L-shaped connecting rod (604) is provided with a piston assembly (7) inside the liquid storage bin (31), and the piston assembly (7) includes a mounting seat (701), the upper surface of the mounting seat (701) is fixedly connected to the bottom end of the L-shaped connecting rod (604), and the outer side of the mounting seat (701) is in contact with the inner side of the liquid storage bin (31), and the inner wall of the mounting seat (701) is symmetrically provided with two movable grooves (702), the bottom ends of the two movable grooves (702) are fixedly connected to a clamping seat (703) on the outer wall of the mounting seat (701), and the inner sides of the two clamping seats (703) are clamped with a clamping plate (704), and the outer walls of the two clamping plates (704) are fixedly connected to a plurality of memory springs (705), and the ends of the plurality of memory springs (705) are fixedly connected to the inner side of the mounting seat (701).

6. The heat-insulating and high-temperature-resistant expansion valve according to claim 5, characterized in that: The outer walls of the two clamping plates (704) are fixedly connected to a plurality of limit rods B (8), the outer walls of the plurality of limit rods B (8) are slidably connected to the inner wall of the mounting seat (701), and the ends of the plurality of limit rods B (8) are fixedly connected to the limit blocks B (801).

7. The heat-insulating and high-temperature-resistant expansion valve according to claim 2, characterized in that: A guide plate (9) is provided below the end of the one-way valve A (32), and a port of the guide plate (9) is close to the blades of the water wheel (303) at the position deviated from the rack A (305).

8. The heat-insulating and high-temperature-resistant expansion valve according to claim 1, characterized in that: An annular seat (10) is provided on the inner side of the protective shell (4), and the annular seat (10) is located below the piston plate (402).

9. The heat-insulating and high-temperature-resistant expansion valve according to claim 1, characterized in that: A connecting pipe C (11) is connected between the protective shell (4) and the inner walls of the plurality of liquid storage bins (31), and the connecting pipe C (11) is located below the annular seat (10), and one end of the plurality of connecting pipes C (11) is provided with a one-way valve B (12) inside the protective shell (4).

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