Water system thermosensitive control valve

Abstract

The utility model discloses a water system thermosensitive control valve which comprises a valve outer shell and an actuating mechanism, and the outer shell comprises a first shell body, a second shell body and a third shell body. One end of the first shell is an inlet, and the other end is an outlet; the second shell is fixedly connected with the first shell, and the third shell is arranged in the second shell; the actuating mechanism comprises a thermosensitive element, a thermosensitive actuator and a piston rod; the thermosensitive actuator is arranged in the third shell, and the movable end of the thermosensitive actuator is connected with the piston rod; the piston rod abuts against the bottom of the first shell. The thermosensitive element penetrates through the third shell and is connected with the thermosensitive actuator; the action range of the thermosensitive actuator changes along with the change of the medium temperature to drive the piston rod to act to change the opening degree of the valve, so that the opening degree proportion of the valve is automatically adjusted according to the medium temperature, and the effect of automatically adjusting the flow to control the stability of the outlet water temperature is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a thermally sensitive control valve for a water system. Background Art

[0002] Temperature control valves (TCVs) are a typical application of flow control valves in the temperature control field. Existing TCVs primarily consist of a motor, valve, temperature sensor, and electronically controlled actuator. The temperature sensor senses temperature changes in the medium (such as water, steam, or oil) and converts these changes into an electrical signal, which is then transmitted to the control circuit. The control circuit processes the temperature signal and outputs a control signal to control the electronically controlled actuator, which adjusts the valve opening. These valves are expensive, complex in structure, and require complex control logic. Furthermore, use in complex electromagnetic environments requires enhanced anti-interference capabilities. Utility Model Content

[0003] In view of the above-mentioned problems existing in the current temperature control valve, the utility model provides a water system thermal control valve, which can simplify the control logic, reduce the operation difficulty and operation and maintenance costs.

[0004] In order to achieve the above-mentioned purpose, the embodiments of the present invention adopt the following technical solutions:

[0005] A water system thermal control valve includes a valve housing and an actuating mechanism, wherein the housing includes a first shell, a second shell and a third shell; one end of the first shell is an inlet and the other end is an outlet; the second shell is fixedly connected to the first shell, and the third shell is arranged in the second shell; the actuating mechanism includes a thermal element, a thermal actuator and a piston rod; the thermal actuator is arranged in the third shell, and its movable end is connected to the piston rod; the piston rod passes through the third shell, the second shell and the first shell to enter the interior of the first shell and abut against the bottom of the first shell; the thermal element passes through the third shell and is connected to the thermal actuator; a water inlet conduit is provided between the first shell and the second shell on the side close to the inlet.

[0006] According to one aspect of the present invention, a first seal is provided at the place where the piston rod passes through the third housing, and a second seal is provided at the place where the piston rod passes through the second housing; a third seal is provided at the place where the piston rod abuts against the bottom of the first housing.

[0007] According to one aspect of the present invention, an exhaust valve is provided at the upper end of the second shell.

[0008] According to one aspect of the present invention, an inlet flange is fixedly connected to the inlet of the first shell, and an outlet flange is provided at the outlet.

[0009] According to one aspect of the present invention, a plurality of supporting connecting members are provided between the third shell and the second shell.

[0010] According to one aspect of the present invention, a mounting seat is provided on the outer surface of the first shell.

[0011] Advantages of the implementation of this utility model:

[0012] The structure of the solution of this application is simple. It uses a thermistor to detect the temperature of the medium at the valve inlet, and drives the piston rod through a thermistor actuator to realize the function of automatically adjusting the valve opening according to the temperature of the inlet medium. Therefore, it is possible to realize real-time adjustment of the inlet medium flow without the aid of external power and energy, so as to achieve the effect of controlling the temperature stability of the medium in the subsequent pipeline outlet, and the control logic is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only 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.

[0014] Figure 1 This is a schematic diagram of the structure of a water system thermal control valve described in this utility model. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the structure of a water system thermal control valve described in this utility model. Figure 2 .

[0016] Legend: 1. First shell; 11. Third seal; 12. Inlet flange; 13. Outlet flange; 14. Mounting seat; 2. Second shell; 21. Water inlet conduit; 22. Exhaust valve; 23. Second seal; 3. Third shell; 31. First seal; 32. Support connector; 4. Thermistor; 5. Thermistor actuator; 6. Piston rod. DETAILED DESCRIPTION

[0017] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or locations, are based on the positions or locations shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figure 1 、 Figure 2 As shown, a water system thermal control valve includes a valve housing and an actuating mechanism, the housing including a first housing 1, a second housing 2, and a third housing 3; one end of the first housing 1 is an inlet and the other end is an outlet; the second housing 2 is fixedly connected to the first housing 1, and the third housing 3 is disposed in the second housing 2; the actuating mechanism includes a thermal element 4, a thermal actuator 5, and a piston rod 6; the thermal actuator 5 is disposed in the third housing 3, and its movable end is connected to the piston rod 6; the piston rod 6 passes through the third housing 3, the second housing 2, and the first housing 1, enters the interior of the first housing 1, and abuts against the bottom of the first housing 1; the thermal element 4 passes through the third housing 3 and is connected to the thermal actuator 5; a water inlet conduit 21 is provided between the first housing 1 and the second housing 2 on the side near the inlet;

[0021] The thermal actuator 5 is a device that can generate mechanical displacement or force in response to temperature changes. Its operating principle is based on the thermal properties of materials, primarily thermal expansion, thermal contraction, and phase change. When a material is heated, its size or volume changes, and this change can be used to drive the movement of mechanical components. For example, in a common thermal double-layer actuator, two materials with different thermal expansion coefficients are combined. When the temperature changes, the change in their relative length causes the mechanical component to bend or move, which can be used to drive the moving part. The thermal element 4 is made of a material with high thermal conductivity.

[0022] In actual use, when the heat medium flows through the valve, it will enter the second shell through the water inlet conduit 21 and come into contact with the thermal element 4. The heat is conducted to the thermal actuator 5. The movable part of the thermal actuator 5 drives the piston rod 6 to move. The amplitude of its movement is positively correlated with the temperature sensed by the thermal element 4. The higher the temperature, the larger the amplitude of the movement. When the temperature of the heat medium rises, the amplitude of the movement of the thermal actuator 5 becomes larger, driving the piston rod 6 to move and reduce the valve opening. When the temperature of the heat medium drops, the amplitude of the movement of the thermal actuator 5 becomes smaller, driving the piston rod 6 to increase the valve opening, thereby achieving the effect of automatically adjusting the valve opening ratio according to the medium temperature, thereby achieving the effect of automatically adjusting the flow rate to control the stability of the water outlet temperature.

[0023] Furthermore, the piston rod 6 can be replaced by a switch component. When the temperature reaches a certain threshold, the movement of the active part of the thermal actuator 5 reaches a certain degree to drive the switch component to open / close the valve. Conversely, when the temperature does not reach the threshold, the valve will remain closed / open.

[0024] In order to ensure the sealing of the valve and avoid leakage and corrosion of the internal components of the valve, a first seal 31 is provided at the place where the piston rod 6 passes through the third shell 3, and a second seal 23 is provided at the place where the piston rod 6 passes through the second shell 2; a third seal 11 is provided at the place where the piston rod 6 abuts the bottom of the first shell 1. When the medium temperature reaches a certain threshold, the action of the thermal actuator 5 reaches its limit, and the valve will be completely closed at this time to ensure that the flow can be completely cut off.

[0025] To ensure that the heat medium can completely fill the interior of the second shell 2 and ensure that the heat sensitive element and the heat medium can be in sufficient and stable contact, an exhaust valve 22 is provided at the upper end of the second shell 2. The exhaust valve 22 allows gas to pass through but does not allow liquid to be discharged to avoid leakage.

[0026] Because the water inlet conduit 21 is provided only on one side of the piston rod 6, the valve of this application is directional. That is, the valve opening is affected only by the temperature of the medium at the valve inlet side. This makes it suitable for applications where the flow rate from hot medium to cold medium needs to be adjusted. This control valve has no electronic components and does not require electricity or other additional energy input for operation, making it suitable for a variety of complex environments.

[0027] An inlet flange 12 is fixedly connected to the inlet of the first shell 1, and an outlet flange 13 is provided at the outlet thereof, so as to facilitate installation and docking with a pipeline; optionally, the valve may also be connected by a threaded connection.

[0028] A plurality of supporting connectors 32 are provided between the third housing 3 and the second housing 2 to ensure the stability of the connection between the third housing 3 and the second housing 2 and to ensure the stability of the valve movable parts.

[0029] The outer surface of the first housing 1 is provided with a mounting seat 14 so that the valve as a whole can be fixedly installed. The movement path of the piston rod 6 is perpendicular to the horizontal plane, which reduces eccentric wear and ensures that the valve can work stably for a long time.

[0030] In practical applications, the outer shell of the valve can be made of common cast iron, while the internal moving parts should be made of stainless steel; similarly, in practical applications, the specifications and dimensions of the valve can be set according to the actual pipeline gears, and the operating temperature range of the thermal actuator 5 can also be selected according to the temperature change range of the medium to be adjusted.

[0031] Advantages of the implementation of this utility model:

[0032] The structure of the solution of this application is simple. It uses a thermistor to detect the temperature of the medium at the valve inlet, and drives the piston rod through a thermistor actuator to realize the function of automatically adjusting the valve opening according to the temperature of the inlet medium. Therefore, it is possible to realize real-time adjustment of the inlet medium flow without the aid of external power and energy, so as to achieve the effect of controlling the temperature stability of the medium in the subsequent pipeline outlet, and the control logic is simple.

[0033] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A water system thermal control valve, comprising a valve housing and an actuating mechanism, characterized in that: The shell comprises a first shell (1), a second shell (2) and a third shell (3); one end of the first shell (1) is an inlet and the other end is an outlet; the second shell (2) is fixedly connected to the first shell (1), and the third shell (3) is arranged in the second shell (2); the action mechanism comprises a thermal element (4), a thermal actuator (5) and a piston rod (6); the thermal actuator (5) is arranged in the third shell (3), and its movable end is connected to the piston rod (6); the piston rod (6) passes through the third shell (3), the second shell (2) and the first shell (1) to enter the interior of the first shell (1) and abut against the bottom of the first shell (1); the thermal element (4) passes through the third shell (3) and is connected to the thermal actuator (5); a water inlet conduit (21) is provided between the first shell (1) and the second shell (2) on the side close to the inlet.

2. The water system thermal control valve according to claim 1, characterized in that: A first seal (31) is provided at the location where the piston rod (6) passes through the third housing (3), and a second seal (23) is provided at the location where the piston rod (6) passes through the second housing (2); a third seal (11) is provided at the location where the piston rod (6) abuts against the bottom of the first housing (1).

3. The water system thermal control valve according to claim 1, characterized in that: An exhaust valve (22) is provided at the upper end of the second shell (2).

4. The water system thermal control valve according to claim 1, characterized in that: An inlet flange (12) is fixedly connected to the inlet of the first shell (1), and an outlet flange (13) is provided at the outlet.

5. The water system thermal control valve according to claim 1, characterized in that: A plurality of supporting connecting members (32) are provided between the third shell (3) and the second shell (2).

6. The water system thermal control valve according to claim 1, characterized in that: A mounting seat (14) is provided on the outer surface of the first shell (1).

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