Heat preservation balance valve for low-temperature cold storage

Abstract

The utility model relates to the technical field of valve bodies, and provides a low-temperature cold storage heat preservation balance valve which comprises a valve body, a first valve head and a second valve head. A balance channel is arranged in the valve body, a first valve port is formed in the top of the valve body, a second valve port is formed in the bottom of the valve body, an external channel is arranged on the valve body between the first valve port and the second valve port, and the first valve port, the second valve port and the external channel are all communicated with the balance channel; the first valve head is arranged at the first valve port and is matched and sealed with the first valve port, and the second valve head is arranged at the second valve port, is positioned in the balance channel and is matched and sealed with the second valve port. The valve heads are arranged on the two valve ports, when pressure difference exists between the inside and the outside, the balance of the inside and outside pressure difference can be automatically carried out through the corresponding valve heads, the whole structure is simple, manual control or other means are not needed, the manufacturing and using cost is low, and the balance of the inside and outside pressure difference can be effectively achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bodies, in particular to a thermal insulation balancing valve for a low-temperature cold storage. Background Art

[0002] Freezers are mainly used to store items for a long time. Among the related low-temperature freezers, there are assembled plate type freezers. This type of low-temperature freezer has good air tightness to ensure a good cooling environment for the low-temperature freezer.

[0003] Due to the difference in temperature between the inside and outside of the low-temperature freezer, there is a pressure difference between the inside and outside of the low-temperature freezer, which is not conducive to personnel entering the freezer and will create certain safety hazards. In addition, due to the pressure difference between the inside and outside, this may affect the use function of the freezer.

[0004] In the related art, some existing valve bodies are used to achieve the balance of internal and external pressures. This method has poor application effect in low-temperature freezers, and manual or electric control is complicated, resulting in poor actual use effect and high layout cost. Utility Model Content

[0005] The utility model provides a low-temperature cold storage insulation balancing valve, which is used to solve the defects of the valve body in the prior art that it is difficult to achieve pressure balance inside and outside the low-temperature cold storage, the cost is high, and the control is complicated.

[0006] The utility model provides a balancing valve, comprising: a valve body, a first valve head and a second valve head; a vertically arranged balancing channel is provided in the valve body, a first valve port is provided at the top of the valve body, a second valve port is provided at the bottom of the valve body, an external channel is provided on the valve body between the first valve port and the second valve port, the first valve port, the second valve port and the external channel are all connected to the balancing channel; the first valve head is placed at the first valve port and is sealed with the first valve port, the second valve head is placed at the second valve port, is located in the balancing channel and is sealed with the second valve port, and the external channel is used to communicate with the outside to balance the internal and external pressures.

[0007] According to the balancing valve provided by the utility model, the balancing valve further includes an external pipe, one end of the external pipe is connected to the external channel, and the other end of the external pipe is communicated with the outside.

[0008] According to the balancing valve provided by the utility model, the external pipe is arranged to be inclined downward, and a connecting elbow is provided at the port of the external pipe.

[0009] According to the balancing valve provided by the present invention, the axis of the external channel is arranged to be inclined downward.

[0010] According to the balancing valve provided by the present invention, the top surface of the first valve port has a supporting inclined surface inclined inwardly, and the first valve head is in contact with the supporting inclined surface.

[0011] According to the balancing valve provided by the present invention, the first valve port is arranged at the top of the balancing channel, the second valve port is arranged at the bottom of the balancing channel, and the caliber of the first valve port is larger than the caliber of the second valve port.

[0012] According to the balancing valve provided by the present invention, the first valve head includes an umbrella-shaped first head portion and a first handle portion connected to the first head portion, and the bottom of the first head portion has a first fitting surface, and the first fitting surface is in fitting contact with the top surface connected to the first valve port.

[0013] According to the balancing valve provided by the present invention, the second valve head includes a second head portion with an umbrella-shaped structure and a second handle portion connected to the second head portion, and the bottom of the second head portion has a second fitting surface, and the second fitting surface is in fitting contact with the bottom surface connected to the second valve port.

[0014] According to the balancing valve provided by the present invention, a connecting flange is further provided at the second valve port, and the connecting flange is used for being in contact with the second fitting surface.

[0015] According to the balancing valve provided by the present invention, the valve body, the first valve head and the second valve head are all thermal insulation parts made of thermal insulation materials.

[0016] The utility model provides a low-temperature cold storage insulation balancing valve, which is connected to the outside through an external channel, and the external channel is connected to the balancing channel. A first valve port and a second valve port are provided at the top and bottom of the balancing channel, and valve heads are provided on both valve ports. When there is a pressure difference between the inside and the outside, the internal and external pressure differences can be automatically balanced through the corresponding valve heads. The overall structure is simple and does not require manual or other means for control. The manufacturing and use costs are low, and the balance of the internal and external pressure differences can be effectively achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the longitudinal cross-sectional structure of the balancing valve provided by the utility model.

[0019] Figure 2It is a schematic diagram of the transverse cross-sectional structure of the balancing valve provided by the utility model.

[0020] Figure 3 It is a schematic diagram of the longitudinal cross-sectional structure of another embodiment of the balancing valve provided by the utility model.

[0021] Reference numerals:

[0022] 1. Valve body; 11. Balancing channel; 12. First valve port; 121. Support slope; 13. Second valve port; 131. Expanding structure; 14. External channel; 2. First valve head; 21. First head portion; 22. First handle portion; 3. Second valve head; 31. Second head portion; 32. Second handle portion; 4. External pipe; 5. Drain pipe; 6. Connecting elbow; 7. Fixed connector; 8. Exterior wall. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the purpose of facilitating the explanation of the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0026] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0028] To preserve food and other items for extended periods, they are typically stored in low-temperature freezers (hereinafter referred to as cold storage for ease of explanation). With technological advancements, cold storage has evolved from traditional civil construction to prefabricated panel-type cold storage. Prefabricated panel-type cold storage requires a relatively sealed internal environment for efficient freezing. However, the pressure differential between the interior and exterior of a cold storage room makes it difficult to open and close the freezer door. Excessive pressure differentials can make the door difficult to open, posing a risk to operator safety and potentially causing accidents. It can also lead to unstable air humidity, which can affect the quality of frozen foods. For example, excessively high humidity can cause frost or frostbite on frozen products.

[0029] Regarding the problems in related technologies, such as Figure 1 、 Figure 2As shown, the utility model provides a low-temperature cold storage insulation balancing valve, including a valve body 1, a first valve head 2 and a second valve head 3; a vertically arranged balancing channel 11 is provided in the valve body 1, a first valve port 12 is provided at the top of the valve body 1, and a second valve port 13 is provided at the bottom of the valve body 1, and an external channel 14 is provided on the valve body 1 between the first valve port 12 and the second valve port 13, and the first valve port 12, the second valve port 13 and the external channel 14 are all connected with the balancing channel 11; the first valve head 2 is placed at the first valve port 12 and is sealed with the first valve port 12, the second valve head 3 is placed at the second valve port 13, is located in the balancing channel 11 and is sealed with the second valve port 13, and the external channel 14 is used to communicate with the outside to balance the internal and external pressures. When balancing the pressure inside and outside the cold storage, it is necessary to connect the inside with the outside to achieve balance, while in normal state, it is necessary to isolate the internal environment of the cold storage from the external environment to ensure the cooling efficiency inside the cold storage. In this embodiment, the balance of internal and external pressures in different scenarios is achieved by setting valve heads at the first valve port 12 and the second valve port 13, and the overall structure is simple, easy to manufacture, and the overall cost is lower.

[0030] There are two scenarios when balancing air pressure. The first scenario is when the external pressure is higher than the internal pressure of the cold storage during the cooling process. At this time, the external high-pressure environment is transmitted to the balancing channel 11 by the external channel 14. At this time, because the external pressure is greater than the internal pressure, the second valve head 3 is pressed tightly against the second valve port 13 under its own gravity and the external air pressure, and the second valve port 13 is in a sealed state. The second valve port 13 will not convect and exchange with the external high-pressure gas. At the same time, the high-pressure gas exerts an upward lifting force on the first valve head 2. When the lifting force is greater than the weight of the first valve head 2 itself, the first valve head 2 can be separated from the sealing with the valve body 1, so that the external high-pressure gas and the gas inside the cold storage can convect and exchange to achieve pressure balance. After the pressure is balanced, the balancing channel 11 no longer generates an upward lifting force on the first valve head 2. At this time, the first valve head 2 can reseal the first valve port 12 under the action of its own gravity.

[0031] Scenario 2 is when the cold storage is heating up and the internal pressure is higher than the external pressure. At this time, the environment inside the cold storage is a high-pressure environment and the external environment is a low-pressure environment. At this time, the first valve head 2 is tightly attached to the first valve port 12 under the action of internal pressure and its own gravity, so that the first valve port 12 is in a sealed state, and there will be no convection and exchange of gas between the first valve port 12 and the external environment. At the same time, the high-pressure gas exerts an upward lifting force on the second valve head 3. When the lifting force is greater than the weight of the second valve head 3 itself, the second valve head 3 can be separated from the sealing with the valve body 1, so that a large amount of convection and exchange occur between the internal high pressure and the external gas to achieve pressure balance. When the pressure is balanced, the pressure difference between the inside and outside disappears. At this time, the second valve head 3 re-seals with the second valve port 13 under the action of its own gravity. It can be seen that in this embodiment, the balance of the internal and external pressure difference and the closing of the balance channel 11 can be automatically achieved through the two valve heads. The overall structure is simple and easy to prepare.

[0032] In this specific example, the first valve head 2 and the second valve head 3 have similar structures, both having a "mushroom head"-shaped main structure, which seals the respective valve openings. The mushroom head-shaped structure provides a certain degree of strength and facilitates support when air pressure balance is required.

[0033] When setting specific Figure 1 As shown, the valve body 1 is constructed as a columnar structure as a whole, the balancing channel 11 is opened along the center position of the columnar structure valve body 1, the external channel 14 is opened along one side of the valve body 1 and is provided with an opening on the side wall of the valve body 1 to achieve communication with the external environment.

[0034] According to one embodiment of the present invention, the first valve port 12 is located at the top of the balancing channel 11, and the second valve port 13 is located at the bottom of the balancing channel 11. The caliber of the first valve port 12 is larger than the caliber of the second valve port 13. To facilitate the manufacture of the valve body 1, in this embodiment, the two valve ports are located at the top and bottom of the balancing channel 11, achieving efficient valve port arrangement.

[0035] It can be understood that the balancing channel 11 is a vertical channel, the first valve port 12 of which is located at the top of the main part of the valve body 1, and the second valve port 13 is located at the bottom of the main part of the valve body 1, and the balancing channel 11 is between the two. This setting can cleverly achieve the air pressure balance inside and outside the cold storage when the internal and external pressure difference changes, and the overall use of the valve head deadweight on each valve port realizes automatic adjustment.

[0036] In addition, in this embodiment, the diameter of the first valve port 12 is set to be larger than the diameter of the second valve port 13. This allows the air pressure in the balance channel 11 to have a larger contact area with the first valve head 2 when the external pressure is greater than the internal pressure of the cold storage, thereby achieving rapid lifting of the first valve head 2 and air pressure balance.

[0037] Specifically, the first valve head 2 includes an umbrella-shaped first head portion 21 and a first handle portion 22 connected to the first head portion 21. The bottom of the first head portion 21 has a first contact surface, which contacts the top surface connected to the first valve port 12. The first head portion 21 of the first valve head 2 is the entire main body, and the first contact surface contacts the top surface of the valve body 1 to achieve a seal at the first valve port 12.

[0038] It is understood that in normal operation (not in the pressure regulation state), it is necessary to ensure a sealed state at the first valve opening 12. In this embodiment, the first contact surface of the first head 21 is used to achieve a seal with the top surface of the valve body 1. In other words, in normal operation, the first contact surface and the top surface of the valve body 1 are in contact and sealed, ensuring efficient cooling in the cold storage.

[0039] In some examples, the top surface of the valve body 1 connected to the first valve port 12 may be a horizontal plane, and the provision of a horizontal plane facilitates the installation of the first valve head 2 .

[0040] In other examples, the top surface of the first valve port 12 has an inwardly inclined support slope 121, and the first valve head 2 contacts the support slope 121. That is, the top surface of the valve body 1 is inclined inward, which facilitates the installation of the first valve head 2.

[0041] It is understood that the top surface of the valve body 1 is configured as a support inclined surface 121, and the corresponding first contact surface is configured as a conical inclined surface, so that the first contact surface can be closely contacted with the support inclined surface 121. This approach allows the first valve head 2 to automatically center after installation, achieving contact and contact between the first valve head 2 and the top surface of the valve body 1, ensuring a tighter connection between the two.

[0042] After the first valve head 2 is connected to the first valve port 12 , the first handle 22 is located in the balancing channel 11 , thereby achieving stable connection of the first valve head 2 .

[0043] In some embodiments, the maximum outer diameter of the second valve head 3 is smaller than the caliber of the first valve port 12. The main body of the second valve head 3 is located at the bottom of the balancing channel 11, and it can close the second valve port 13 when the external air pressure is high. To facilitate installation of the second valve head 3, this embodiment sets the caliber of the first valve port 12 to be larger than that of the second valve head 3. This allows the entire second valve head 3 to be installed on the second valve port 13 via the first valve port 12, achieving convenient installation.

[0044] In a specific example, a flared structure 131 is provided at the bottom of the second valve port 13. The flared structure 131 can facilitate the contact between the internal high-pressure gas and the second valve head 3, thereby lifting the second valve head 3 and achieving pressure balance inside and outside the cold storage.

[0045] According to the specific embodiment provided by the present invention, the second valve head 3 includes an umbrella-shaped second head portion 31 and a second handle portion 32 connected to the second head portion 31. The bottom of the second head portion 31 has a second fitting surface, which fits in contact with the bottom surface connected to the second valve port 13. The overall structure of the second valve head 3 is consistent with that of the first valve head 2. Both form a mushroom-shaped structure with the second head portion 31 and the second handle portion 32, wherein the second handle portion 32 is located within the second valve port 13. In this embodiment, the structural definition of the second valve head 3 enables efficient lifting of the second valve head 3, thereby achieving the opening and closing of the second valve port 13.

[0046] It is understandable that when the internal pressure is higher than the external pressure, the internal air pressure can lift the second valve head 3 so that the second fitting surface is separated from the valve body 1 and suspended in the air, thereby realizing the flow exchange between the internal high-pressure gas and the external gas and achieving pressure balance.

[0047] like Figure 3 As shown, in some examples, the bottom surface of the balancing channel 11 is horizontal. In this case, the balancing channel 11 is in a cylindrical barrel structure as a whole, and the second contact surface is a horizontal surface structure. This enables the second valve head 3 to be tightly and stably contacted with the second valve port 13, thereby achieving the opening and closing of the second valve port 13. This approach can make the second valve head 3 and the second valve port 13 more stable during the pressure balancing process and when restoring the closure of the second valve port 13.

[0048] like Figure 1 As shown, in other examples, the bottom surface of the balancing channel 11 is an inclined slope structure. In this case, the balancing channel 11 as a whole has a right-angled trapezoidal structure, and the second fitting surface is an inclined slope structure. This enables the second valve head 3 to fit tightly and stably with the second valve port 13, thereby achieving the opening and closing of the second valve port 13. This method is conducive to the discharge of condensed water in the balancing channel 11, avoids the accumulation of condensed water, and facilitates the rapid discharge of condensed water.

[0049] In a specific configuration, a connecting flange is further provided at the second valve opening 13, and the connecting flange is configured to be in contact with the second abutting surface. The connecting flange is provided around the edge of the second valve opening 13, so that when the second valve head 3 is sealing, the second abutting surface thereof abuts against the connecting flange to close the second valve opening 13.

[0050] It should be understood that in the aforementioned embodiment, during the process of balancing the air pressure of the first valve head 2 and the second valve head 3, the first handle 22 and the second handle 32 are both located in their respective valve ports. This is because during the process of balancing the air pressure, once the first valve head 2 and the second valve head 3 open their respective valve ports, air pressure balance can be achieved. At this time, the first handle 22 and the second handle 32 are located in their respective valve ports, preventing the first valve head 2 and the second valve head 3 from separating from the valve body 1.

[0051] According to one embodiment of the present invention, the axis of the external channel 14 is tilted downward. The external channel 14 is connected to the balancing channel 11 to be connected to the external air pressure. The tilted downward axis allows the external channel 14 to facilitate the discharge of condensed water.

[0052] In a specific configuration, the axis of the external channel 14 is also the structural direction of the external channel 14 , which can facilitate the timely discharge of condensed water by tilting downward to avoid the deposition of condensed water.

[0053] According to the specific embodiment provided by the utility model, the balancing valve further includes an external pipe 4, one end of which is connected to the external channel 14, and the other end of which is connected to the outside. The external pipe 4 is a pipe structure that can realize the circulation and exchange of external air with the internal air of the cold storage, thereby achieving the balance of the internal and external air pressures.

[0054] In some embodiments, in a cold storage balancing system, the valve body 1 is mounted on an exterior wall 8 via a fixed connector 7. Specifically, the fixed connector 7 comprises an Ω-shaped fixture that can embrace the valve body 1 and secure it to the exterior wall 8. A perforation is formed in the exterior wall 8, through which one end of the external pipe 4 passes and is located outside the exterior wall 8, thereby enabling communication with the outside.

[0055] In the specific setting, the external pipe 4 is tilted downward, and a connecting elbow 6 is provided at the end of the external pipe 4. The external pipe 4 is tilted downward to facilitate the discharge of condensed water.

[0056] The slope of the external pipe 4 is consistent with the slope of the external channel 14, which is conducive to the discharge of condensed water.

[0057] In a specific application, the arrangement of the connecting elbow 6 can facilitate the connection of the drainage pipe 5 . The drainage pipe 5 is arranged in a vertical direction and communicates with the external channel 14 through the connecting elbow 6 .

[0058] According to the specific embodiment provided by the present invention, the valve body 1, the first valve head 2 and the second valve head 3 are all made of heat-insulating materials. The use of heat-insulating materials can reduce the loss of cooling capacity and the occurrence of frosting.

[0059] Specifically, the thermal insulation material can be commonly used thermal insulation materials such as polystyrene foam, polyurethane foam, etc. Commonly used thermal insulation materials are easily available and can reduce overall production costs.

[0060] From the above description of the embodiments, those skilled in the art will clearly understand that each embodiment connects to the outside via an external channel 14, which in turn connects to the balancing channel 11. A first valve port 12 and a second valve port 13 are provided at the top and bottom of the balancing channel 11. By providing valve heads on both valve ports, when a pressure differential exists between the inside and outside, the corresponding valve heads automatically balance the pressure differential. The overall structure is simple, requiring no manual or other control measures, resulting in low manufacturing and operational costs, and effectively balancing the internal and external pressure differential. When the cold storage requires a rapid temperature reduction due to business needs, this can reduce or even prevent issues such as bulging of the wall and floor insulation and sinking of the assembly panel ceiling. Furthermore, the portion of the entire device located within the low-temperature storage is constructed of insulating material, reducing cooling loss and the occurrence of frost. Furthermore, by providing the first and second valve heads 2 and 3 at the upper and lower ends of the balancing channel 11, manual opening and closing is eliminated, eliminating the possibility of human error or forgetfulness, thereby improving overall safety. Using the balancing valve in the example above can reduce the cold storage temperature rise and fall time by 1 / 3 to 1 / 2, increasing economic benefits during the cooling period by 30% to 50%. At the same time, since the valve does not require manual operation, the labor intensity of cold storage managers is reduced.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A low-temperature cold storage insulation balancing valve, characterized in that: include: A valve body, a first valve head, and a second valve head; The valve body has a vertically arranged balancing channel, a first valve port is formed at the top of the valve body, a second valve port is formed at the bottom of the valve body, and an external channel is provided on the valve body between the first valve port and the second valve port, and the first valve port, the second valve port and the external channel are all in communication with the balancing channel; The first valve head is placed at the first valve port and is sealed with the first valve port. The second valve head is placed at the second valve port, located in the balancing channel and is sealed with the second valve port. The external channel is used to communicate with the outside to balance the internal and external pressures.

2. The low-temperature cold storage insulation balancing valve according to claim 1, characterized in that: The balancing valve further includes an external pipe, one end of which is connected to the external channel, and the other end of which is in communication with the outside.

3. The low-temperature cold storage insulation balancing valve according to claim 2, characterized in that: The external pipe is arranged to be tilted downward, and a connecting elbow is provided at the port of the external pipe.

4. The low-temperature cold storage insulation balancing valve according to claim 1, characterized in that: The axis of the external channel is arranged to be inclined downward.

5. The low-temperature cold storage insulation balancing valve according to claim 1, characterized in that: The top surface of the first valve port has a supporting inclined surface inclined inwardly, and the first valve head is in contact with the supporting inclined surface.

6. The low-temperature cold storage insulation balancing valve according to claim 1, characterized in that: The first valve port is located at the top of the balancing channel, the second valve port is located at the bottom of the balancing channel, and the caliber of the first valve port is larger than that of the second valve port.

7. The low-temperature cold storage insulation balancing valve according to claim 1, characterized in that: The first valve head includes an umbrella-shaped first head portion and a first handle portion connected to the first head portion. The bottom of the first head portion has a first fitting surface, and the first fitting surface is in fitting contact with the top surface connected to the first valve port.

8. The low-temperature cold storage insulation balancing valve according to claim 1, characterized in that: The second valve head includes a second head portion in an umbrella-shaped structure and a second handle portion connected to the second head portion. The bottom of the second head portion has a second fitting surface, and the second fitting surface is in fitting contact with the bottom surface connected to the second valve port.

9. The low-temperature cold storage insulation balancing valve according to claim 8, characterized in that: A connecting flange is further provided at the second valve port, and the connecting flange is used for contacting with the second fitting surface.

10. The low-temperature cold storage insulation balancing valve according to claim 1, characterized in that: The valve body, the first valve head and the second valve head are all thermal insulation parts made of thermal insulation materials.

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