Temperature control drain valve
By using a combination design of valve core, shape memory alloy spring and return spring in the temperature-controlled drain valve, the problems of large structure and high cost of temperature-controlled drain valve in small pipelines are solved. It realizes automatic adjustment of water flow temperature, improves response speed and system efficiency, adaptability and reliability.
Patent Information
- Application Number
- CN202520619191.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-03
AI Technical Summary
Existing temperature-controlled drain valves have a large structure in small pipelines, resulting in high adaptability and cost, and require an electrical control system, making it difficult to meet the requirements of low cost and miniaturization.
The valve core, shape memory alloy spring, and return spring are combined in a design that automatically adjusts the opening and closing of the valve core according to temperature changes to achieve drainage without pipeline pressure. The shape memory alloy spring is used to drive the valve core to move under high and low temperature changes, thus achieving automatic drainage.
This miniaturized temperature-controlled drain valve automatically adjusts the water flow temperature without pipeline pressure, has a fast response speed, reduces adjustment lag, improves system efficiency, has a simple structure, is easy to maintain, and is highly adaptable.
Smart Images
Figure CN223895231U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a temperature-controlled drain valve, belonging to the field of valve technology. Background Technology
[0002] In many industrial and civil applications, it is necessary to automatically open a drain valve to empty the medium after equipment shutdown and the temperature of the medium in the pipeline drops to a certain range. The most common types are low-temperature anti-freeze valves, as well as drain / discharge valves for room temperature operation. This requirement can be met using temperature sensors and electrically controlled proportional valves, but the cost is relatively high, and it also requires the installation of circuitry and logic control modules.
[0003] For small pipelines such as DN15 and below, the above-mentioned drain valves have more components, resulting in a larger structure and requiring a greater investment in adaptability.
[0004] In view of this, it is indeed necessary to improve the existing temperature-controlled drain valve to solve the above problems. Utility Model Content
[0005] To solve the above-mentioned technical problems, this utility model provides a temperature-controlled drain valve. The temperature-controlled drain valve has a compact structure, is suitable for small pipelines, and can adjust the water flow temperature without pipeline pressure.
[0006] The technical solution of this utility model is:
[0007] A temperature-controlled drain valve for installation in a small pipeline includes:
[0008] The valve body has a liquid passage chamber and a water outlet communicating with the liquid passage chamber;
[0009] A valve core is movably disposed within the liquid passage chamber, and a liquid flow channel is formed between the valve core and the wall of the liquid passage chamber. A sealing element is provided at the end of the valve core facing the outlet.
[0010] A shape memory alloy spring is located between the valve core and the outlet or on the side of the valve core opposite to the outlet.
[0011] A return spring is located on the side of the valve core opposite to the shape memory alloy spring.
[0012] As a further improvement of this utility model, the valve core has a sealing groove at one end facing the water outlet, and the sealing element is at least partially housed in the sealing groove.
[0013] As a further improvement of this utility model, the valve core includes an abutting portion away from the water outlet, a sealing portion having the sealing groove, and a pressing portion connecting the abutting portion and the sealing portion, wherein the sealing element is constrained between the water outlet and the pressing portion.
[0014] As a further improvement of this utility model, a plane perpendicular to the extension direction of the liquid passage cavity is defined as the projection plane, and the projection of the sealing part on the projection plane is completely covered by the projection of the pressing part on the projection plane.
[0015] As a further improvement of this utility model, the memory alloy spring is sleeved on the outer periphery of the sealing part and the pressing part, and abuts against the abutting part, or the memory alloy spring is located on the side of the abutting part opposite to the water outlet.
[0016] As a further improvement of this utility model, the projection of the sealing part and the sealing member on the water outlet can completely cover the water outlet.
[0017] As a further improvement of this utility model, the temperature-controlled drain valve also includes an inlet connected to the liquid passage chamber and the outlet, and one of the reset spring and the memory alloy spring is located between the valve core and the inlet.
[0018] As a further improvement of this utility model, the liquid passage cavity has a limiting member disposed near the water inlet, and one of the reset spring and the memory alloy spring is restricted between the valve core and the limiting member.
[0019] As a further improvement of this utility model, the temperature-controlled drain valve has a normal state and a drain state. In the normal state, the memory alloy spring and the return spring work together on the valve core, causing the seal on the valve core to abut against the outlet, and the outlet is closed. In the drain state, the memory alloy spring deforms, so as to push the valve core to move under the action of the memory alloy spring or the return spring, so that the seal on the valve core disengages from the outlet, and the outlet is opened.
[0020] As a further improvement of this utility model, a mounting part is provided on the outer periphery of the valve body, and the mounting part is used to install the temperature-controlled drain valve to the small pipeline.
[0021] The beneficial technical effects of this utility model are as follows: The temperature-controlled drain valve of this utility model uses a valve core movably installed in the liquid passage chamber to form a liquid flow channel between the valve core and the wall of the liquid passage chamber. A sealing element is provided at the end of the valve core facing the outlet. A shape memory alloy spring is located between the valve core and the outlet, or on the side of the valve core opposite to the outlet. A return spring is located on the side of the valve core opposite to the shape memory alloy spring. Under the combined action of the shape memory alloy spring and the return spring on the valve core, the sealing element on the valve core always abuts against the outlet to close it under normal conditions. When the shape memory alloy spring deforms, the valve core is pushed to move under the action of one of the shape memory alloy springs or the return spring, causing the sealing element on the valve core to disengage from the outlet, opening the outlet for drainage. This allows for water temperature regulation even without pipeline pressure. Furthermore, because the shape memory alloy spring responds quickly to temperature changes, the response speed of the temperature-controlled drain valve is improved, enabling it to adapt to temperature changes promptly, reducing adjustment lag, and improving the overall efficiency and effectiveness of the system. Moreover, this temperature-controlled drain valve has a simple structure, is easy to maintain and replace parts, has good reliability and adaptability, and can operate stably in different working environments. Attached Figure Description
[0022] Figure 1 This is a structural schematic diagram of a temperature-controlled drain valve conforming to a preferred embodiment of the present utility model.
[0023] Figure 2 yes Figure 1 A schematic diagram of the combined structure of the valve core and the shape memory alloy spring.
[0024] Figure 3 yes Figure 2 A schematic diagram of the structure of the middle valve core.
[0025] Figure 4 yes Figure 1 The diagram shows a cross-sectional view of the temperature-controlled drain valve. Detailed Implementation
[0026] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.
[0027] Please see Figures 1 to 4As shown, this utility model discloses a temperature-controlled drain valve 100, which is typically installed in series at the end of a small pipeline. After the equipment stops, when the temperature of the medium in the small pipeline drops to a certain range, a drain valve automatically opens to drain the medium in the pipeline. The temperature-controlled drain valve 100 of this utility model has a compact structure, making it particularly suitable for small pipelines with a DN of 15 or less. It is also easy to maintain, inexpensive, and practical.
[0028] Specifically, the temperature-controlled drain valve 100 includes a valve body 1 and a valve core 2. The valve body 1 is installed in series to the end of the small pipeline and has a liquid passage chamber and an outlet 11 communicating with the liquid passage chamber. Optionally, the inner surface of the liquid passage chamber is smooth to reduce resistance during fluid flow. Preferably, a mounting portion 13 is provided on the outer periphery of the valve body 1, which is used to install the temperature-controlled drain valve 100 to the small pipeline.
[0029] The valve core 2 is movably disposed in the liquid passage chamber, and a liquid flow channel 20 is formed between the valve core 1 and the wall of the liquid passage chamber. The liquid flow channel 20 is interconnected with the outlet 11 so that the water of the temperature control drain valve 100 is discharged from the outlet 11.
[0030] The valve core 2 has a sealing element 3 at one end facing the outlet 11. Under normal conditions, the sealing element 3 abuts against the outlet 11 and completely seals the outlet 11 to prevent water leakage from the temperature-controlled drain valve 100. Preferably, the valve core 2 has a sealing groove 21 at one end facing the outlet 11, and the sealing element 3 is at least partially housed within the sealing groove 21. In this case, the sealing element 3 is preferably a sealing ring.
[0031] The valve core 2 includes an abutment portion 22 away from the outlet 11, a sealing portion 23 with the sealing groove 21, and a pressing portion 24 connecting the abutment portion 22 and the sealing portion 23. The sealing member 3 is constrained between the outlet 11 and the pressing portion 24. Preferably, the projections of the sealing portion 23 and the sealing member 3 onto the outlet 11 can completely cover the outlet 11. In this way, the outlet 11 can be sealed relatively tightly to prevent leakage.
[0032] Preferably, a plane perpendicular to the extension direction of the liquid passage cavity is defined as the projection plane, and the projection of the sealing part 23 on the projection plane is completely covered by the projection of the pressing part 24 on the projection plane. That is, the area of the pressing part 24 is larger than the area of the sealing part 23, and the projection of the sealing part 23 on the pressing part 24 is completely covered by the pressing part 24. At this time, the pressing part 24 presses the sealing member 3 at the outlet 11 to completely fix it. The force that presses the sealing member 3 on the outlet 11 is the water flow flowing from the small pipe into the temperature-controlled drain valve 100. After the water flow enters the temperature-controlled drain valve 100, it continuously pushes the valve core 2, causing it to move toward the outlet 11, thereby pressing and fixing the sealing member 3 on the outlet 11.
[0033] Therefore, the temperature-controlled drain valve 100 also includes an inlet 12 connected to the liquid passage chamber and the outlet 11. The inlet 12 and the outlet 11 are preferably on the same horizontal line, that is, located at both ends of the temperature-controlled drain valve 100.
[0034] The temperature-controlled drain valve 100 also includes a shape memory alloy spring 4, which is located between the valve core 2 and the outlet 11 or on the side of the valve core 2 opposite to the outlet 11. Figure 2 and Figure 4 As shown, the shape memory alloy spring 4 is located between the valve core 2 and the water outlet 11. However, this is only one embodiment. It can be adjusted to the side of the valve core 2 relative to the water outlet 11 according to the actual situation.
[0035] The grains of the shape memory alloy spring 4 are austenitic at high temperatures, and its shear modulus and elastic modulus are much higher than those at low temperatures (martensite). Externally, this manifests as the shape memory alloy spring 3 exhibiting several times greater elastic force at high temperatures than at low temperatures. This is the basis for the shape memory alloy spring's ability to sense external temperatures and respond accordingly. In other words, the shape memory alloy spring 4 stretches when sensing high temperatures and contracts when sensing low temperatures.
[0036] When the shape memory alloy spring 4 is located between the valve core 2 and the outlet 11, the shape memory alloy spring 4 is disposed on the outer periphery of the sealing part 23 and the pressing part 24, and abuts against the abutting part 22. At this time, when the temperature sensed by the shape memory alloy spring 4 is high, the shape memory alloy spring 4 stretches and pushes the valve core 2 to move away from the outlet 11, thereby causing the sealing element 3 on the valve core 2 to move away from the outlet 11, so that the outlet 11 opens to drain water; when the temperature sensed by the shape memory alloy spring 4 is low, the shape memory alloy spring 4 contracts, and the valve core 2 moves towards the outlet 11 under the action of water flow to squeeze the sealing element 3, so that the outlet 11 is in a normally closed state.
[0037] Conversely, when the shape memory alloy spring 4 is located on the side of the valve core 2 opposite to the outlet 11, that is, between the abutment portion 22 of the valve core 2 and the inlet 12, when the shape memory alloy spring 4 senses a high temperature, the shape memory alloy spring 4 stretches and pushes the valve core 2 toward the outlet 11 to compress the seal 3, so that the outlet 11 is in a normally closed state; when the shape memory alloy spring 4 senses a low temperature, the shape memory alloy spring 4 contracts, and at this time there is a lack of a force to push the valve core 2 away from the outlet 11.
[0038] Therefore, the temperature-controlled drain valve 100 also includes a return spring 5, which is located on the side of the valve core 2 opposite to the shape memory alloy spring 4. When the shape memory alloy spring 4 is located on the side of the valve core 2 opposite to the outlet 11, the return spring 5 is located between the valve core 2 and the outlet 11. Under normal conditions, the interaction between the shape memory alloy spring 4 and the return spring 5 presses the seal 3 against the outlet 11. When the shape memory alloy spring 4 senses a low temperature, it contracts, and the return spring 5 pushes the valve core 2 to move away from the outlet 11, thus opening the outlet 11 for drainage.
[0039] By setting the reset spring 5 and the memory alloy spring 4, the temperature-controlled drain valve 100 can automatically drain water even without pipeline pressure, making it more practical.
[0040] Preferably, the liquid passage chamber has a limiting member 14 located near the water inlet 12, and one of the reset spring 5 and the shape memory alloy spring 4 is restricted between the valve core 2 and the limiting member 14.
[0041] Therefore, the temperature-controlled drain valve 100 has a normal state and a drain state. In the normal state, the shape memory alloy spring 4 and the return spring 5 work together on the valve core 2, causing the seal 3 on the valve core 2 to abut against the outlet 11, and the outlet 11 is closed. In the drain state, the shape memory alloy spring 4 deforms, so that the valve core 2 is pushed to move under the action of the shape memory alloy spring 4 or the return spring 5, so that the seal 3 on the valve core 2 disengages from the outlet 11, and the outlet 11 is opened.
[0042] In summary, the temperature-controlled drain valve 100 of this utility model forms a liquid flow channel 20 between the valve core 2 and the wall of the liquid flow chamber by means of a valve core 2 movably disposed in the liquid passage chamber. A sealing element 3 is provided at the end of the valve core 2 facing the outlet 11. A shape memory alloy spring 4 is located between the valve core 2 and the outlet 11 or on the side of the valve core 2 opposite to the outlet 11. A return spring 5 is located on the side of the valve core 2 opposite to the shape memory alloy spring 4, so that the shape memory alloy spring 4 and the return spring 5... Under the combined action of the valve core 2, the sealing element 3 on the valve core 2 is always in contact with the outlet 11 to close the outlet 11 under normal conditions. However, after the shape memory alloy spring 4 deforms, the valve core 2 is pushed to move under the action of one of the shape memory alloy spring 4 and the return spring 5, causing the sealing element 3 on the valve core 2 to disengage from the outlet 11, opening the outlet 11 for drainage. This allows for water temperature regulation even without pipeline pressure. Furthermore, because the shape memory alloy spring 4 responds quickly to temperature changes, it improves the response speed of the temperature-controlled drain valve 100, enabling it to adapt to temperature changes promptly, reducing adjustment lag, and improving the overall efficiency and effectiveness of the system. Moreover, this temperature-controlled drain valve has a simple structure, is easy to maintain and replace parts, has good reliability and adaptability, and can operate stably in different working environments.
[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A temperature-controlled drain valve for installation in a small pipeline, characterized in that, include: The valve body has a liquid passage chamber and a water outlet communicating with the liquid passage chamber; A valve core is movably disposed within the liquid passage chamber, and a liquid flow channel is formed between the valve core and the wall of the liquid passage chamber. A sealing element is provided at the end of the valve core facing the outlet. A shape memory alloy spring is located between the valve core and the outlet or on the side of the valve core opposite to the outlet. A return spring is located on the side of the valve core opposite to the shape memory alloy spring.
2. The temperature-controlled drain valve according to claim 1, characterized in that, The valve core has a sealing groove at one end facing the water outlet, and the seal is at least partially housed in the sealing groove.
3. The temperature-controlled drain valve according to claim 2, characterized in that, The valve core includes an abutting portion away from the outlet, a sealing portion having the sealing groove, and a pressing portion connecting the abutting portion and the sealing portion, wherein the sealing element is constrained between the outlet and the pressing portion.
4. The temperature-controlled drain valve according to claim 3, characterized in that, A plane perpendicular to the extension direction of the liquid passage cavity is defined as the projection plane, and the projection of the sealing part on the projection plane is completely covered by the projection of the pressing part on the projection plane.
5. The temperature-controlled drain valve according to claim 3, characterized in that, The shape memory alloy spring is sleeved on the outer periphery of the sealing part and the pressing part, and abuts against the abutting part, or the shape memory alloy spring is located on the side of the abutting part opposite to the water outlet.
6. The temperature-controlled drain valve according to claim 3, characterized in that, The projection of the sealing part and the sealing element on the water outlet can completely cover the water outlet.
7. The temperature-controlled drain valve according to claim 1, characterized in that, The temperature-controlled drain valve also includes an inlet connected to the liquid passage chamber and the outlet, and one of the reset spring and the memory alloy spring is located between the valve core and the inlet.
8. The temperature-controlled drain valve according to claim 7, characterized in that, The liquid passage chamber has a limiting member located near the water inlet, and one of the reset spring and the memory alloy spring is restricted between the valve core and the limiting member.
9. The temperature-controlled drain valve according to claim 1, characterized in that, The temperature-controlled drain valve has a normal state and a drain state. In the normal state, the shape memory alloy spring and the return spring work together on the valve core, causing the seal on the valve core to abut against the outlet, and the outlet is closed. In the drain state, the shape memory alloy spring deforms, and under the action of the shape memory alloy spring or the return spring, it pushes the valve core to move, so that the seal on the valve core disengages from the outlet, and the outlet is opened.
10. The temperature-controlled drain valve according to claim 1, characterized in that, The valve body has a mounting part on its outer periphery, which is used to install the temperature-controlled drain valve to the small pipeline.