Temperature control valve for high-pressure low-temperature working medium

Abstract

A temperature control valve for a high-pressure low-temperature working medium comprises a valve body, a valve element assembly and a valve element control assembly. The valve element assembly is movably arranged in the valve body and controls the temperature control valve to be opened or closed. The number of the valve element control assemblies is two, memory alloy springs are arranged in the two valve element control assemblies, the shape of the two memory alloy springs changes when the two memory alloy springs detect environment temperature changes, the valve element assemblies are jointly driven to move in a push-pull dual-drive mode through magnetic coupling, and therefore the reliability of opening of the temperature control valve is greatly improved. Besides, direct contact between the valve element control assembly and the valve element assembly is avoided through magnetic coupling, meanwhile, a thermal insulation measure is adopted between the memory alloy spring and a connecting structure of the high-pressure temperature control valve, and the influence of a low-temperature working medium on work of the memory alloy spring is avoided; therefore, the high-pressure temperature control valve is not influenced by the low-temperature medium when being opened, reliable work of the high-pressure temperature control valve when the low-temperature medium flows through can be ensured, release of carbon dioxide is ensured, and fire is ensured to be fully extinguished.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves for nonferrous metal rolling high-pressure carbon dioxide fire extinguishing systems, in particular to a temperature control valve for high-pressure and low-temperature working media. Background Art

[0002] The Chinese utility model patent with application number CN202210229279.0 discloses a two-way connected double-spool shut-off memory alloy spring temperature control valve. Its principle is to directly control the opening and closing of the valve by detecting the external temperature through the memory alloy spring. It does not rely on an external power supply and does not require a control communication chain. Therefore, it has extremely high working reliability; however, when the above-mentioned two-way connected double-spool shut-off memory alloy spring temperature control valve is directly applied to a low-temperature medium working environment, the memory alloy spring will not work normally because it is affected by the low-temperature working medium; for example, when it is applied to a non-ferrous metal rolling high-pressure carbon dioxide fire extinguishing system, the memory alloy spring detects that the ambient temperature is higher than the set temperature and will control the valve to open, but the low-temperature working medium flowing through the valve will cause The memory alloy spring closes when the temperature drops, so it cannot maintain continuous opening when the high-pressure carbon dioxide fire extinguishing system is working; in addition, the above-mentioned two-way connection double valve core shut-off memory alloy spring temperature control valve is only provided with one memory alloy spring. The working medium pressure in the closed state is relatively low (2.4MPa), and the pressure acting on the valve core is also relatively small. Therefore, the deformation of one memory alloy spring can reliably open the temperature control valve. However, when used in the non-ferrous metal rolling high-pressure carbon dioxide fire extinguishing system, due to the high working medium pressure (5.5-6.5MPa), the pressure acting on the valve core is also relatively large. The deformation of one memory alloy spring cannot reliably open the temperature control valve. Therefore, it must be improved when used in the high-pressure carbon dioxide fire extinguishing system. Utility Model Content

[0003] In order to overcome the deficiencies in the background technology, the utility model discloses a temperature control valve for high-pressure and low-temperature working media, so as to solve the problem that the existing two-way connected double valve core shut-off memory alloy spring temperature control valve cannot be directly applied to low-temperature working media.

[0004] In order to achieve the purpose of the utility model, the utility model adopts the following technical solution: a temperature control valve for high-pressure and low-temperature working media, characterized in that: it includes a valve body, a valve core assembly, and a valve core control assembly; the valve core assembly is movably arranged in the valve body, and the valve core assembly controls the temperature control valve to open or close when the valve body moves; there are two valve core control assemblies, which jointly drive the valve core assembly to move in a push-pull manner.

[0005] Furthermore, the valve core control assembly includes a valve core control assembly A and a valve core control assembly B; the valve core control assembly A and the valve core control assembly B are fixedly arranged at the upper and lower ends of the valve body respectively; the valve core control assembly A and the valve core control assembly B are connected to the valve core assembly through magnetic coupling; the valve core control assembly A and the valve core control assembly B are provided with a memory alloy spring, and heat insulation measures are provided between the memory alloy spring and other components; the memory alloy spring is deformed due to the high temperature of the environment, and the valve core assembly is driven to move through magnetic coupling.

[0006] Furthermore, an upper valve core cavity and a lower valve core cavity are provided in the valve body, and the upper valve core cavity and the lower valve core cavity are connected through a valve hole; the upper valve core cavity is connected to the air inlet, and the lower valve core cavity is connected to the air outlet;

[0007] The valve core assembly includes a valve core, a magnet seat, a permanent magnet A, and a sealing gasket; a valve core plate is provided in the middle of the valve core, and the sealing gasket is arranged at the lower part of the valve core plate; the valve core plate is arranged in the upper valve core cavity, and the lower part of the valve core extends through the valve hole to the lower valve core cavity; the magnet seat is fixedly arranged at the upper and lower ends of the valve core, and the permanent magnet A is fixedly arranged at the outer end of the magnet seat.

[0008] Furthermore, the valve core control component A also includes a valve stem, a valve cover, a permanent magnet B, a valve stem sleeve, a spring fixing plate, a memory alloy spring, and a valve stem top plate; a thin-walled isolation sleeve is provided at the lower part of the valve cover; the valve stem sleeve is fixedly arranged in the middle of the flange; the lower end of the valve stem is arranged in the cavity of the thin-walled isolation sleeve, and the permanent magnet B is fixedly arranged at the lower end of the valve stem; the valve stem top plate is fixedly arranged at the upper end of the valve stem; the upper end of the memory alloy spring is fixedly connected to the valve stem top plate through the spring fixing plate, and the lower end is fixedly connected to the valve cover through the spring fixing plate; the valve core control component A is fixedly arranged on the upper part of the valve body, and the lower end of the thin-walled isolation sleeve is arranged in the cavity of the magnet seat.

[0009] Furthermore, the structure of the valve core control component B is the same as that of the valve core control component A; the valve core control component B is fixedly arranged at the lower part of the valve body, and the upper end of the thin-walled isolation sleeve is arranged in the cavity of the magnet seat.

[0010] Furthermore, the memory alloy spring in the valve core control component A is in a contracted state at room temperature; and the memory alloy spring in the valve core control component B is in an extended state at room temperature.

[0011] Furthermore, a heat-insulating sleeve is provided between the valve stem sleeve and the valve stem; and a heat-insulating pad is provided between the spring fixing plate and the valve stem top plate.

[0012] Furthermore, the outer surface of the thin-walled isolation sleeve is coated with a heat-insulating coating.

[0013] Furthermore, the thin-walled isolation sleeve is made of stainless steel.

[0014] Due to the adoption of the technical solution described above, the utility model has the following beneficial effects: the utility model discloses a temperature control valve for high-pressure and low-temperature working media, which directly detects the ambient temperature through two memory alloy springs, thereby greatly improving the opening reliability of the high-pressure temperature control valve; the high-pressure temperature control valve drives the valve core to move through magnetic coupling, and at the same time, temperature insulation measures are also taken between the connection structure of the memory alloy spring and the high-pressure temperature control valve, which solves the influence of low temperature on the operation of the memory alloy spring, so that the high-pressure temperature control valve is not affected by the low-temperature medium when it is opened, and can ensure that the high-pressure temperature control valve works reliably when the low-temperature medium flows through, ensure the release of carbon dioxide, and ensure that the fire is fully extinguished. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the high-pressure temperature control valve;

[0016] Figure 2 Schematic diagram of the cross-section structure of the valve body;

[0017] Figure 3 Schematic diagram of the valve core assembly structure;

[0018] Figure 4 This is a structural diagram of the valve core control component A;

[0019] Figure 5 This is a structural diagram of the valve core control component B.

[0020] In the figure: 1. Valve body; 1.1. Air inlet; 1.2. Upper valve core cavity; 1.3. Air outlet; 1.4. Lower valve core cavity; 1.5. Valve hole; 2. Valve core assembly; 2.1. Valve core; 2.1.1. Valve core plate; 2.2. Magnet seat; 2.3. Permanent magnet A; 2.4. Sealing gasket; 3. Valve core control assembly A; 3.1. Valve stem; 3.2. Valve cover; 3.2.1. Thin-walled isolation sleeve; 3.3. Permanent magnet B; 3.4. Valve stem sleeve; 3.5. Spring fixing plate; 3.6. Memory alloy spring A; 3.7. Valve stem top plate; 3.8. Thermal insulation pad; 3.9. Thermal insulation sleeve; 4. Valve core control assembly B; 4.6. Memory alloy spring B. DETAILED DESCRIPTION

[0021] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0022] See the instructions attached Figure 1 : A temperature control valve for high-pressure and low-temperature working media, comprising a valve body 1, a valve core assembly 2, a valve core control assembly A3, and a valve core control assembly B4;

[0023] See the instructions attached Figure 2: The valve body 1 is provided with an upper valve core cavity 1.2 and a lower valve core cavity 1.4, which are connected through a valve hole 1.5; the upper valve core cavity 1.2 is connected to the air inlet 1.1, and the lower valve core cavity 1.4 is connected to the air outlet 1.3;

[0024] See the instructions attached Figure 3 :The valve core assembly 2 includes a valve core 2.1, a magnet seat 2.2, a permanent magnet A2.3, and a sealing gasket 2.4; the valve core 2.1 is rod-shaped, with a valve core plate 2.1.1 in the middle and threaded connectors at both ends, and the sealing gasket 2.4 is arranged at the lower part of the valve core plate 2.1.1; the valve core plate 2.1.1 is arranged in the upper valve core cavity 1.2, and the lower part of the valve core 2.1 passes through the valve hole 1.5 and extends into the lower valve core cavity 1.4; the magnet seat 2.2 is basin-shaped, with a through hole at the bottom, and the through hole at the bottom of the magnet seat 2.2 passes through the threaded connectors at both ends of the valve core 2.1 and is fixed to the upper and lower ends of the valve core 2.1 by nuts; the permanent magnet A2.3 is annular and is fixed to the outer end of the magnet seat 2.2 by bonding;

[0025] See the instructions attached Figure 4 :The valve core control assembly A3 includes a valve stem 3.1, a valve cover 3.2, a permanent magnet B3.3, a valve stem sleeve 3.4, a spring fixing plate 3.5, a memory alloy spring A3.6, a valve stem top plate 3.7, a thermal insulation pad 3.8, and a thermal insulation sleeve 3.9; a thin-walled isolation sleeve 3.2.1 made of stainless steel is fixedly provided on the lower part of the valve cover 3.2 by welding, and the outer surface of the thin-walled isolation sleeve 3.2.1 is coated with thermal insulation paint; the valve stem sleeve 3.4 is fixedly provided in the middle of the valve cover 3.2 by threads; a tray is provided at the lower end of the valve stem 3.1, and the tray is provided in the cavity of the thin-walled isolation sleeve, and the permanent magnet B3.3 is annular and is fixed to the tray at the lower end of the valve stem 3.1 by bonding; the thermal insulation sleeve 3.9 is a short circular tube with a flange plate on the top. The thermal insulation sleeve 3.9 is provided in the annular space between the valve stem 3.1 and the valve stem sleeve 3.4, and the top flange plate is provided at the upper end of the valve cover 3.2; the valve stem top plate 3.7 is fixedly provided At the upper end of the valve stem 3.1; a spring groove is provided on one end face of the spring fixing plate 3.5, one spring fixing plate 3.5 is fixed to the upper end of the valve cover 3.2 by bolts with the groove facing downward, and the spring fixing plate 3.5 and the valve cover 3.2 are isolated by the top flange plate of the thermal insulation sleeve 3.9, and the other spring fixing plate 3.5 is fixed to the lower end of the valve stem top plate 3.7 by bolts with the groove facing upward, and the spring fixing plate 3.5 and the valve stem top plate 3.7 are isolated by a thermal insulation pad 3.8; the memory alloy spring A3.6 is in a contracted state at room temperature, and has spring fixing heads bent at both ends. The memory alloy spring A3.6 is sleeved on the valve stem 3.1, and the upper spring fixing head is arranged in the spring groove of the upper spring fixing plate 3.5 and is fixedly connected to the valve stem top plate 3.7, and the lower spring fixing head is arranged in the spring groove of the lower spring fixing plate 3.5 and is fixedly connected to the valve cover 3.2;

[0026] See the instructions attached Figure 5 : The structure of the valve core control component B4 is the same as that of the valve core control component A3. The memory alloy spring 4.6 in the valve core control component B4 is in an extended state at room temperature;

[0027] See the instructions attached Figure 1 : The valve core control component A3 is fixedly arranged on the upper part of the valve body 1 by bolts, the thin-walled isolation sleeve 3.2.1 is arranged in the magnet seat 2.2 cavity in the upper valve core cavity 1.2, and the permanent magnet B3.3 is magnetically coupled with the permanent magnet A2.3; the valve core control component B4 is fixedly arranged on the lower part of the valve body 1 by bolts, the thin-walled isolation sleeve 3.2.1 is arranged in the magnet seat 2.2 cavity in the lower valve core cavity 1.4, and the permanent magnet B3.3 is magnetically coupled with the permanent magnet A2.3.

[0028] When the high-pressure temperature control valve is in use, it is fixedly installed at the upper part of the fire extinguishing area, with the air inlet 1.1 connected to the high-pressure nitrogen cylinder (pressure 5.5-6.5MPa), and the air outlet 1.3 connected to the controlled valve; in the standby state, the memory alloy spring A3.6 is in a contracted state, and the memory alloy spring B4.6 is in an extended state. The magnetic coupling between the permanent magnet B3.3 and the permanent magnet A2.3 drives the valve core plate 2.1.1 to close the valve hole 1.5; the high-pressure nitrogen enters the upper valve core cavity 1.2 through the air inlet 1.1, The pressure of high-pressure nitrogen acts on valve core plate 2.1.1, ensuring the sealing of the high-pressure temperature control valve in the standby state. In the event of a fire, memory alloy springs A3.6 and B4.6 are deformed by the high temperature, causing memory alloy spring A3.6 to extend and memory alloy spring B4.6 to contract. The magnetic coupling between permanent magnets B3.3 and A2.3 drives valve core assembly 2 upward, providing greater driving force for valve core assembly 2 and ensuring the smooth opening of the high-pressure temperature control valve.

[0029] After the high-pressure temperature control valve opens, high-pressure nitrogen flows through the valve, causing a drop in temperature due to volume expansion. The valve stem 3.1 and permanent magnet B3.3, isolated by a thin-walled isolation sleeve, will not directly come into contact with the low-temperature nitrogen flowing through the high-pressure temperature control valve. Furthermore, the thermal insulation coating, insulation pad 3.8, and insulation sleeve 3.9 provide insulation, preventing the low temperature from being transferred to the memory alloy springs A3.6 and B4.6, which could cause the high-pressure temperature control valve to close prematurely.

[0030] The parts not described in detail in this utility model are prior art.

[0031] Those skilled in the art should understand that they can implement variations by combining the prior art and the above embodiments. Such variations do not affect the essence of this solution and are not described in detail here.

[0032] It should be understood that this solution is not limited to the specific implementation methods described above. Devices and structures not described in detail should be understood to be implemented in a common manner in the art. Any person skilled in the art can, without departing from the scope of this solution, use the methods and technical content disclosed above to make many possible changes and modifications to this solution, or modify it into equivalent embodiments with equivalent changes, without affecting the essence of this solution. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this solution without departing from the content of this solution are still within the scope of protection of this solution.

Claims

1. A temperature control valve for high-pressure and low-temperature working media, characterized by: The invention comprises a valve body (1), a valve core assembly (2), and a valve core control assembly; the valve core assembly (2) is movably arranged in the valve body (1); when the valve body (1) moves, the valve core assembly (2) controls the temperature control valve to open or close; two valve core control assemblies are provided, which jointly drive the valve core assembly (2) to move in a push-pull manner.

2. The temperature control valve for high-pressure and low-temperature working media according to claim 1, characterized in that: The valve core control component includes a valve core control component A (3) and a valve core control component B (4); the valve core control component A (3) and the valve core control component B (4) are fixedly arranged at the upper and lower ends of the valve body (1) respectively; the valve core control component A (3) and the valve core control component B (4) are connected to the valve core component (2) through magnetic coupling; the valve core control component A (3) and the valve core control component B (4) are provided with a memory alloy spring, and a heat insulation measure is provided between the memory alloy spring and other components; the memory alloy spring is deformed due to the influence of the high temperature of the environment, and drives the valve core component (2) to move through the magnetic coupling.

3. The temperature control valve for high-pressure and low-temperature working media according to claim 2, characterized in that: An upper valve core chamber (1.2) and a lower valve core chamber (1.4) are provided in the valve body (1), and the upper valve core chamber (1.2) and the lower valve core chamber (1.4) are connected via a valve hole (1.5); the upper valve core chamber (1.2) is connected to the air inlet (1.1), and the lower valve core chamber (1.4) is connected to the air outlet (1.3); The valve core assembly (2) includes a valve core (2.1), a magnet seat (2.2), a permanent magnet A (2.3), and a sealing gasket (2.4); a valve core plate ( 2.1.1), the sealing gasket (2.4) is arranged at the lower part of the valve core plate (2.1.1); the valve core plate (2.1.1) is arranged in the upper valve core cavity (1.2), and the lower part of the valve core (2.1) extends through the valve hole (1.5) to the lower valve core cavity (1.4); the magnet seat (2.2) is fixedly arranged at the upper and lower ends of the valve core (2.1), and the permanent magnet A (2.3) is fixedly arranged at the outer end of the magnet seat (2.2).

4. The temperature control valve for high-pressure and low-temperature working media according to claim 3, characterized in that: The valve core control assembly A (3) also includes a valve stem (3.1), a valve cover (3.2), a permanent magnet B (3.3), a valve stem sleeve (3.4), a spring fixing plate (3.5), a memory alloy spring, and a valve stem top plate (3.7); a thin-walled isolation sleeve (3.2.1) is provided at the lower part of the valve cover (3.2); the valve stem sleeve (3.4) is fixedly arranged in the middle of the flange; the lower end of the valve stem (3.1) is arranged in the cavity of the thin-walled isolation sleeve, and the permanent magnet B (3.3) is fixed It is arranged at the lower end of the valve stem (3.1); the valve stem top plate (3.7) is fixedly arranged at the upper end of the valve stem (3.1); the upper end of the memory alloy spring is fixedly connected to the valve stem top plate (3.7) through the spring fixing plate (3.5), and the lower end is fixedly connected to the valve cover (3.2) through the spring fixing plate (3.5); the valve core control component A (3) is fixedly arranged on the upper part of the valve body (1), and the lower end of the thin-walled isolation sleeve (3.2.1) is arranged in the cavity of the magnet seat (2.2).

5. The temperature control valve for high-pressure and low-temperature working media according to claim 4, characterized in that: The structure of the valve core control component B (4) is the same as that of the valve core control component A (3); the valve core control component B (4) is fixedly arranged at the lower part of the valve body (1), and the upper end of the thin-walled isolation sleeve (3.2.1) is arranged in the cavity of the magnet seat (2.2).

6. The temperature control valve for high-pressure and low-temperature working media according to claim 5, characterized in that: The memory alloy spring in the valve core control component A (3) is in a contracted state at room temperature; the memory alloy spring in the valve core control component B (4) is in an extended state at room temperature.

7. The temperature control valve for high-pressure and low-temperature working media according to claim 4, characterized in that: A heat insulating sleeve (3.9) is provided between the valve stem sleeve (3.4) and the valve stem (3.1); and a heat insulating pad (3.8) is provided between the spring fixing plate (3.5) and the valve stem top plate (3.7).

8. The temperature control valve for high-pressure and low-temperature working media according to claim 4, characterized in that: The outer surface of the thin-walled isolation sleeve is coated with heat-insulating paint.

9. The temperature control valve for high-pressure and low-temperature working media according to claim 4, characterized in that: The thin-walled isolation sleeve (3.2.1) is made of stainless steel.

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