Adjustable temperature control device for storage and transportation of liquid carbon dioxide

Abstract

The invention aims to provide an adjustable temperature control device for liquid carbon dioxide storage and transportation, which comprises a temperature sensing device and a temperature control and alarm device, and the temperature sensing device mainly comprises a liquid carbon dioxide storage tank, a pressure film, a movable piston and related accessories thereof. The temperature control device comprises a spring, a circuit connecting key, wires connected with an external circuit and the like, the temperature change can cause the pressure change in the storage tank, the pressure film pushes the piston to move up and down, one of the two groups of wires is normally connected and the other group is normally disconnected, and a bolt at the top of the spring is adjustable. And the temperature monitoring of the temperature control device can be adjusted. According to the invention, the problem of temperature early warning control in the storage and transportation process of liquid carbon dioxide can be effectively solved, the operation is convenient and fast, the cost is low, the monitored temperature can be adjusted, and the market application prospect is wide.

Description

Technical Field

[0001] The invention belongs to the field of instrument control and relates to an adjustable temperature control device based on the carbon dioxide phase change principle and applicable to a liquid carbon dioxide storage tank. Background Art

[0002] Phase change temperature control technology is a technology that achieves temperature regulation based on the property of phase change materials (PCMs) to absorb or release large amounts of latent heat during solid-liquid, liquid-gas, or solid-solid phase changes. Its background and development are closely related to energy management, thermal control needs, and advances in materials science. It is currently widely used in building energy conservation, electronic equipment thermal management, aerospace, new energy, medical, textile, food cold chain, industrial thermal management, automotive, and military fields. The design and management of temperature control devices for liquid carbon dioxide storage tanks face numerous challenges, including cryogenic requirements, phase change control, insulation design, pressure management, material selection, energy efficiency, safety, environmental adaptability, monitoring and control, and economic efficiency. Traditional temperature control devices primarily rely on sensors such as thermistors and thermocouples to detect and regulate temperature. These devices are difficult to adapt to the low-temperature, high-pressure CO2 storage environment and have limitations in sensitivity and durability.

[0003] In order to overcome some difficulties in the background, the patent of this invention adopts a mechanical structure and uses phase change principle temperature control technology, which can adapt to low temperature environment. At the same time, the device has low cost and easy operation. Summary of the Invention

[0004] An adjustable temperature control device for storing and transporting liquid carbon dioxide is characterized in that: the adjustable temperature control device structure comprises a liquid carbon dioxide storage tank (1), a circuit protection shell (2), an end cover (3), a normally connected wire (4), a normally disconnected wire (5), a pressure film (6), a movable piston (7), a movable spring (8), a circuit connection key (9), a fixed spring (10), an adjusting bolt (11), a protective cover fixing bolt (12) and a protective cover (13); the liquid carbon dioxide storage tank (1) contains liquid carbon dioxide, a wall surface of the liquid carbon dioxide storage tank (1) is provided with an inwardly concave annular rib, the liquid carbon dioxide storage tank (1) is connected to the circuit protection shell (2), and the liquid carbon dioxide storage tank (1) and the pressure film (6) are bonded by vulcanization; the circuit protection shell (2) is connected to the end cover (3), and the end cover (3) is fixed to the pressure film (6). Two pairs of circular holes (302) are symmetrically opened for the wires to enter and exit, and a self-locking nut (303) is opened in the center of the end cover (3) to cooperate with the adjusting bolt (11); the pressure film (6) contacts the movable piston (7), the movable piston (7) contacts the movable spring (8), the movable spring (8) contacts the circuit connection key (9), the circuit connection key (9) contacts the fixed spring (10), and the fixed spring (10) contacts the adjusting bolt (11); the central axis of the liquid carbon dioxide storage tank (1), the circuit protection shell (2), the pressure film (6), the movable piston (7), the movable spring (8), the circuit connection key (9), the fixed spring (10), the adjusting bolt (11) and the end cover (3) completely coincide; two screw holes (301) are opened on the top of the end cover (3) to cooperate with the protective cover fixing bolt (12) to fix the protective cover (13).

[0005] The liquid carbon dioxide storage tank (1) is connected to the circuit protection shell (2). The wall of the liquid carbon dioxide storage tank (1) is provided with an inwardly concave annular rib (101) to enhance heat exchange. A buckle (701) is provided at the bottom of the movable piston (7) to limit the maximum displacement of the movable piston (7) and prevent the piston from moving too far up to damage the circuit part when the pressure film (6) is under too much pressure. When the temperature inside the liquid carbon dioxide storage tank (1) is higher than the set value, the movable piston (7) moves upward against the circuit connection key (9), the normally connected wire (4) is disconnected, and the temperature control circuit is triggered. When the temperature inside the liquid carbon dioxide storage tank (1) reaches the alarm value, the circuit connection key (9) moves upward until it connects to the normally disconnected wire (5), triggering the alarm circuit. The circuit connection key (9) is hollowed out to reduce the weight to reduce the influence of its own weight. A self-locking nut (303) is provided in the end cover (3) to cooperate with the adjusting bolt (11) to ensure accuracy. Twisting the adjusting bolt (11) can change the pressure borne by the spring and can change the monitoring and alarm temperature of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is an overall cross-sectional view of the present invention;

[0007] Figure 2 is an isometric view of a liquid carbon dioxide storage tank according to the present invention;

[0008] Figure 3 is a cross-sectional view of the circuit protection shell of the present invention;

[0009] Figure 4 is an isometric view of the end cap of the present invention;

[0010] Figure 5 is a cross-sectional view of the end cap of the present invention;

[0011] Figure 6 It is an isometric drawing of the permanent connecting wire of the present invention;

[0012] Figure 7 It is an isometric drawing of the normally-broken conductor of the present invention;

[0013] Figure 8 is an isometric view of the pressure film of the present invention;

[0014] Figure 9 A cross-sectional view of a movable piston of the present invention;

[0015] Figure 10 Isometric view of the movable spring and the fixed spring of the present invention;

[0016] Figure 11 An isometric diagram of a circuit connection key of the present invention;

[0017] Figure 12 An isometric view of the adjusting bolt of the present invention;

[0018] Figure 13 An isometric view of the present invention as a whole. DETAILED DESCRIPTION

[0019] The following is combined with Figures 1 to 13 The present invention is further described in detail with specific implementation methods so that the objects, advantages and technical solutions of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0020] An adjustable temperature control device for storing and transporting liquid carbon dioxide is characterized in that the adjustable temperature control device structure comprises a liquid carbon dioxide storage tank (1), a circuit protection shell (2), an end cover (3), a normally connected wire (4), a normally disconnected wire (5), a pressure film (6), a movable piston (7), a movable spring (8), a circuit connection key (9), a fixing spring (10), an adjusting bolt (11), a protective cover fixing bolt (12), and a protective cover (13).

[0021] Liquid carbon dioxide is stored in the liquid carbon dioxide storage tank (1), and an inwardly concave annular fin (101) is provided on the side of the liquid carbon dioxide storage tank (1), which can enhance heat exchange without increasing the volume of the device, ensuring that the device can quickly sense changes in external temperature and achieve maximum sensitivity. The liquid carbon dioxide storage tank (1) and the pressure film (6) are vulcanized and bonded to ensure that the space inside the liquid carbon dioxide storage tank (1) is absolutely sealed. The liquid carbon dioxide storage tank (1) and the line protection shell (2) can be connected by bonding or mechanically connected by bolts. The line protection shell (2) and the movable piston (7) are tightly connected. The contact surface between the movable piston (7) and the line protection shell (2) can be made of a composite material with a low friction coefficient, and lubricating oil is added at the connection to reduce friction.

[0022] The top of the movable piston (7) is provided with a groove (702), which is the same as the upper and lower ends of the circuit connection key (9) for fixing the spring. Two sets of wires enter and are fixed from the end cover opening (302). When the monitored temperature does not exceed the set temperature, the pressure in the liquid carbon dioxide storage tank (1) is normal. At this time, the circuit connection key (9) and the normally connected wire (4) are connected, and the corresponding execution circuit is a path. When the monitored temperature exceeds the set temperature but does not reach the alarm temperature, the pressure in the liquid carbon dioxide storage tank (1) gradually increases, the pressure film (6) moves upward against the movable piston (7), and at the same time, the movable spring (8) moves upward against the circuit connection key (9), the normally connected wire (4) is disconnected, and the corresponding execution circuit is a circuit break, triggering temperature control. When the monitored temperature reaches the alarm temperature, the movable spring (8) continues to move upward against the circuit connection key (9), the normally disconnected wire (4) is connected, and the corresponding execution circuit is converted from a circuit break to a path, triggering an over-temperature alarm.

[0023] The nut on the end cover (3) is a self-locking nut (303) that cooperates with the adjusting bolt (11) to position the upper end of the fixed spring (10). The self-locking nut (303) can limit the displacement of the adjusting bolt (11) to ensure the accuracy of the device. By twisting the adjusting bolt (11), the pressure on the spring can be changed, thereby adjusting the position of the circuit connection key (9) so that the monitoring temperature can be adjusted. If the device does not need to adjust the temperature, the adjusting bolt (11) can be welded. The top of the end cover (3) is provided with a screw hole (301) connected to the protective cover (13) to protect the adjusting bolt (11) from external interference.

[0024] Beneficial effects

[0025] The purpose of the present invention is to provide an adjustable temperature control device that is low in cost, easy to operate, has a long service life and can be used in liquid carbon dioxide storage tanks. The device is mainly composed of a mechanical structure, can respond quickly and is safe. The upper and lower ends of the device have the same diameter and can be simply assembled by simply opening a hole in the liquid carbon dioxide storage tank. It is easy to modify and apply in practice, effectively solving the design problem of the temperature control device of the liquid carbon dioxide storage tank, and has broad market application prospects.

Claims

1. An adjustable temperature control device for storage and transportation of liquid carbon dioxide, characterized by: The adjustable temperature control device structure comprises a liquid carbon dioxide storage tank (1), a circuit protection shell (2), an end cover (3), a normally connected wire (4), a normally disconnected wire (5), a pressure film (6), a movable piston (7), a movable spring (8), a circuit connection key (9), a fixed spring (10), an adjusting bolt (11), a protective cover fixing bolt (12) and a protective cover (13); the wall surface of the liquid carbon dioxide storage tank (1) is provided with an inwardly concave annular rib (101); the liquid carbon dioxide storage tank (1) is connected to the circuit protection shell (2); the liquid carbon dioxide storage tank (1) and the pressure film (6) are bonded by vulcanization; the circuit protection shell (2) is connected to the end cover (3); the end cover (3) is symmetrically provided with two pairs of circular holes (302) for the wire to enter and exit; the end cover ( 3) A self-locking nut (303) is provided at the center to cooperate with the adjusting bolt (11); the pressure film (6) contacts the movable piston (7), the movable piston (7) contacts the movable spring (8), the movable spring (8) contacts the circuit connection key (9), the circuit connection key (9) contacts the fixed spring (10), and the fixed spring (10) contacts the adjusting bolt (11); the central axis of the liquid carbon dioxide storage tank (1), the circuit protection shell (2), the pressure film (6), the movable piston (7), the movable spring (8), the circuit connection key (9), the fixed spring (10), the adjusting bolt (11) and the end cover (3) completely coincide; two screw holes (301) are provided on the top of the end cover (3) to cooperate with the protective cover fixing bolts (12) to fix the protective cover (13).

2. The adjustable temperature control device according to claim 1, characterized in that: The liquid carbon dioxide storage tank (1) and the circuit protection shell (2) are connected to each other, and an inwardly recessed annular rib (101) is provided on the wall surface of the liquid carbon dioxide storage tank (1) to enhance heat exchange.

3. The adjustable temperature control device according to claim 1, characterized in that: A buckle (701) is provided at the bottom of the movable piston (7) to limit the maximum displacement of the movable piston (7) and prevent the piston from over-topping and damaging the circuit part when the pressure film (6) is under too much pressure.

4. The adjustable temperature control device according to claim 1, characterized in that: When the temperature in the liquid carbon dioxide storage tank (1) is higher than the set value, the movable piston (7) moves upward against the circuit connection key (9), the normally connected wire (4) is disconnected, and the temperature control circuit is triggered. When the temperature in the liquid carbon dioxide storage tank (1) reaches the alarm value, the circuit connection key (9) moves upward until it connects to the normally disconnected wire (5), triggering the alarm circuit. The circuit connection key (9) is hollowed out to reduce the weight so as to reduce the influence of its own weight.

5. The adjustable temperature control device according to claim 1, characterized in that: A self-locking nut (303) is provided in the end cover (3) to match the adjusting bolt (11) to ensure accuracy.

6. The adjustable temperature control device according to claim 1, characterized in that: Twisting the adjusting bolt (11) can change the pressure borne by the spring and can change the monitoring and alarm temperature of the device.

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