Unit valve with built-in temperature measuring element

Abstract

The application relates to a unit valve with a built-in temperature measuring element and belongs to the field of heating systems, which comprises an actuator and a valve body, a valve rod connected with the actuator is arranged in the valve body, the valve rod is internally hollow, a threading hole communicating between the inside and the outside is formed in the top of the valve rod, a temperature measuring element for measuring the temperature of fluid is inserted in the valve rod, and the electric wire of the temperature measuring element is electrically connected with a circuit board in the inside of the actuator through the threading hole. The application has the effects of preventing the electric wire of the temperature measuring element from being exposed outside, avoiding additional holes in the valve body and the actuator, and enhancing the safety and sealing performance of the unit valve.

Description

Technical Field

[0001] This application relates to the field of heating systems, and more particularly to a unit valve with a built-in temperature sensing element. Background Technology

[0002] Unit valves are the core control components in heating systems. They are typically adjusted by electric actuators based on real-time monitoring of the return water temperature, thereby dynamically regulating the flow of water in the heating pipes to prevent overheating or underheating.

[0003] In order to monitor the return water temperature in real time, existing unit valves often have a pre-drilled mounting hole on the valve body for installing a temperature sensor. The temperature sensor is inserted into the mounting hole, with one end of the temperature sensor located in the flow channel for hot water in the valve body. The actuator of the unit valve usually has a pre-drilled wire hole. The wire of the temperature sensor passes through the mounting hole, then through the wire hole into the actuator, and is electrically connected to the circuit board inside the actuator.

[0004] Regarding the aforementioned technologies, the inventors believe that exposed wires of temperature sensors are prone to damage, are unsafe and unsightly, and affect the temperature measurement performance of the temperature sensors; furthermore, additional openings on the valve body and actuator undoubtedly increase the possibility of water leakage from the valve body and water ingress into the actuator. Utility Model Content

[0005] To prevent the wires of the temperature sensing element from being exposed, and to avoid additional openings in the valve body and actuator, this application provides a unit valve with a built-in temperature sensing element.

[0006] This application provides a unit valve with a built-in temperature sensing element, which adopts the following technical solution:

[0007] A unit valve with a built-in temperature sensing element includes an actuator and a valve body. The valve body is provided with a valve stem connected to the actuator. The valve stem has an internal hollow structure and a wire hole with internal and external communication is opened at its top. A temperature sensing element for measuring the temperature of the fluid is inserted into the valve stem. The wire of the temperature sensing element passes through the wire hole and is electrically connected to the circuit board inside the actuator.

[0008] By adopting the above technical solution, the valve stem is designed as a hollow structure, which allows the temperature sensing element to be inserted inside the valve stem. The wire of the temperature sensing element is then passed through the wire hole at the top of the valve stem and connected to the circuit board inside the actuator. This ensures that both the temperature sensing element and the wire are located inside the unit valve, effectively preventing the wire of the temperature sensing element from being exposed. It also avoids the need for additional openings in the valve body and actuator, thus enhancing the safety and sealing of the unit valve.

[0009] Optionally, the bottom of the valve stem is located within the flow channel inside the valve body, and the bottom of the temperature sensing element is located within the flow channel inside the valve body.

[0010] By adopting the above technical solution, since the bottom of the temperature sensing element is located in the flow channel inside the valve body, the temperature sensing element can monitor the temperature of the hot water in real time through the heat conduction of the valve body when the hot water flows through the flow channel inside the unit valve.

[0011] Optionally, the actuator is provided with a drive mechanism, and a connecting shaft is provided between the drive mechanism and the valve stem. The drive mechanism drives the valve stem to move through the connecting shaft.

[0012] By adopting the above technical solution, the connecting shaft connects the valve stem and the drive mechanism, thereby connecting the valve body and the actuator.

[0013] Optionally, the connecting shaft has a through hole with both ends passing through it, and the wire of the temperature measuring element passes through the through hole and is electrically connected to the circuit board inside the actuator.

[0014] By adopting the above technical solution, part of the temperature sensing element is located inside the valve body and part is located inside the connecting shaft. Without affecting the original connection structure of the unit valve, the entire temperature sensing element and wires are located inside the unit valve, effectively preventing the wires of the temperature sensing element from being exposed outside the unit valve. At the same time, it avoids the need for additional openings on the valve body and actuator. While ensuring that the temperature sensing function of the unit valve is not affected, the safety and sealing of the unit valve are enhanced.

[0015] Optionally, a first sealing ring is provided between the temperature sensing element and the inner wall of the through hole, and the wire connection of the temperature sensing element is located above the first sealing ring.

[0016] By adopting the above technical solution, since the connecting shaft needs to connect the valve body and the actuator, when water accidentally enters from the joint of the connecting shaft, the first sealing ring can play a sealing role between the temperature sensing element and the connecting shaft, preventing water from entering the actuator and affecting its normal use, thus further enhancing the safety and sealing performance of the unit valve.

[0017] Optionally, the top end of the connecting shaft is provided with a glue injection groove, and the connecting shaft and the temperature measuring element or the wires of the connecting shaft and the temperature measuring element are fixed in the glue injection groove by glue injection.

[0018] By adopting the above technical solution, after the glue is injected into the glue injection tank, it plays a sealing role between the temperature measuring element and the connecting shaft. When water accidentally enters from the joint of the connecting shaft, it can also prevent water from flowing into the actuator, thus enhancing the safety and sealing performance of the unit valve.

[0019] Optionally, the drive mechanism includes a drive shaft connected to the connecting shaft, the drive shaft having a through hole at its bottom end, and a wiring hole at its top end communicating with the through hole. The wires of the temperature sensing element are sequentially passed through the through hole and the wiring hole and electrically connected to the circuit board inside the actuator.

[0020] By adopting the above technical solution, since the connecting shaft is connected between the drive shaft and the valve core, and a connecting hole is opened on the drive shaft, the temperature sensing element and its wire can be passed through the valve core, the connecting shaft and the drive shaft from bottom to top. Without affecting the original connection structure of the unit valve, the temperature sensing element and its wire can be located inside the unit valve, avoiding the need to open additional holes on the actuator, and ensuring that the temperature sensing element is easy to install and the wire routing is simple and easy to connect to the power supply.

[0021] Optionally, the wiring hole extends horizontally through both sides of the drive shaft.

[0022] By adopting the above technical solution, the wiring hole is made to be open on both sides, allowing the wires of the temperature sensing element to be passed out from either side of the wiring hole, which facilitates the connection of the wires of the temperature sensing element to the circuit board.

[0023] Optionally, the circuit board inside the actuator is located above the actuator mechanism.

[0024] By adopting the above technical solution, the circuit board is located inside the actuator, which not only facilitates the disassembly and maintenance of the circuit board, but also minimizes the contact between water and the circuit board, ensuring the safety of the circuit board.

[0025] Optionally, the actuator includes a housing, the connecting shaft passes through the bottom wall of the housing, and a second sealing ring is provided between the connecting shaft and the housing.

[0026] By adopting the above technical solution, in order to prevent water from entering the connecting shaft from the joint and coming into contact with the wires of the temperature sensing element, or even entering the actuator, a second sealing ring is set between the connecting shaft and the housing, which can play an effective sealing role.

[0027] Optionally, the temperature sensing element is in the shape of a round rod, and the wires of the temperature sensing element are connected to its top.

[0028] By adopting the above technical solution, the cylindrical temperature sensing element is easy to install; the wire of the temperature sensing device is connected to the top, which reduces the possibility of the wire coming into contact with water and also facilitates connection with the circuit board.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] By passing the temperature sensing element and its wires sequentially through the valve core, connecting shaft, and drive shaft from bottom to top, the temperature sensing element and its wires can be located inside the unit valve without affecting the original connection structure of the unit valve. This effectively prevents the wires of the temperature sensing element from being exposed outside the unit valve and avoids the need for additional openings in the valve body and actuator.

[0031] By setting a first sealing ring between the temperature sensing element and the connecting shaft, the wires of the temperature sensing element can be protected, thus enhancing the safety and sealing performance of the unit valve. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application;

[0033] Figure 2 This is a cross-sectional view of Embodiment 1 of this application;

[0034] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0035] Figure 4 This is an exploded view of Embodiment 1 of this application;

[0036] Figure 5 This is an exploded view of the actuator in Embodiment 1 of this application;

[0037] Figure 6 This is an exploded view of embodiment 1 of the present application;

[0038] Figure 7 This is a cross-sectional view of Embodiment 2 of this application;

[0039] Figure 8 yes Figure 7 A magnified view of a section at point B in the middle.

[0040] Explanation of reference numerals in the attached drawings: 1. Actuator; 11. Housing; 111. Mounting groove; 112. Mounting hole; 12. Connecting shaft; 121. Through hole; 122. Upper connecting hole; 123. Lower connecting hole; 124. Second sealing ring; 125. Glue injection groove; 13. Drive mechanism; 131. Upper mounting base; 132. Lower mounting base; 133. Motor; 134. Gear set; 135. Drive shaft; 1351. Connecting hole; 1352. Wiring hole; 14. Circuit board; 15. Battery; 16. Angle sensor; 2. Valve body; 21. Valve stem; 211. Wire hole; 22. Valve core; 3. Temperature sensing element; 31. First sealing ring. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail. Example 1:

[0042] Embodiment 1 of this application discloses a unit valve with a built-in temperature sensing element.

[0043] Reference Figure 1 A unit valve with a built-in temperature sensing element includes a valve body 2 and an actuator 1 mounted on top of the valve body 2. The actuator 1 is used to control the opening degree of the valve body 2.

[0044] In this embodiment, the unit valve is a rotary valve. (Refer to...) Figure 1 and Figure 2 The valve body 2 has a flow channel for fluid flow. A rotatable valve core 22 is installed in the flow channel. A vertically arranged, round rod-shaped valve stem 21 is connected above the valve core 22. The bottom of the valve stem 21 is located in the flow channel, and the top of the valve stem 21 is connected to the actuator 1, so that the actuator 1 controls the valve stem 21 to drive the valve core 22 to rotate in the flow channel, thereby controlling the opening degree of the valve body 2.

[0045] Reference Figure 2 and Figure 3 The valve stem 21 has an internally hollow structure, and a through-hole 211 is provided at the top of the valve stem 21, which is open to both the inside and outside. A temperature sensing element 3 is inserted into the valve stem 21. The temperature sensing element 3 is rod-shaped and fits tightly against the inner wall of the valve stem 21. The bottom of the temperature sensing element 3 is located in the flow channel of the valve body 2. In this embodiment, both the valve stem 21 and the temperature sensing element 3 are made of metal. The temperature sensing element 3 is a temperature sensor that can monitor the water temperature in the flow channel in real time under the heat conduction of the valve body 2. The wire of the temperature sensing element 3 is connected to its top and passes through the through-hole 211.

[0046] Reference Figure 2 and Figure 3 The actuator 1 includes a housing 11 and a drive mechanism 13, a circuit board 14, and a battery 15 installed inside the housing 11. The circuit board 14 is located above the drive mechanism 13, and the battery 15 is located on one side of the drive mechanism 13 and the battery 15 and is electrically connected to the circuit board 14. A connecting shaft 12 is provided between the drive mechanism 13 and the valve stem 21. The bottom end of the connecting shaft 12 is connected to the top end of the valve stem 21, and the top end of the connecting shaft 12 is inserted inside the housing 11. The circuit board 14 plays a control role over the drive mechanism 13, and the drive mechanism 13 can drive the connecting shaft 12 to rotate the valve stem 21.

[0047] Reference Figure 2 and Figure 3The connecting shaft 12 is cylindrical, and a through hole 121 is provided inside the connecting shaft 12, with the top of the temperature sensing element 3 located inside the through hole 121. The wire of the temperature sensing element 3 passes through the through hole 121, thereby electrically connecting to the circuit board 14 inside the actuator 1. Since the temperature sensing element 3 and its top wire are sequentially inserted into the valve stem 21 and the connecting shaft 12, the wire of the temperature sensing element 3 is prevented from being exposed, and additional holes are avoided on the valve body 2 and the actuator 1. This enhances the safety and sealing of the unit valve while ensuring that the temperature sensing function of the unit valve is not affected.

[0048] Reference Figure 3 Because a through hole 121 is opened in the connecting shaft 12, water can easily seep in from the connection between the connecting shaft 12 and the top of the valve stem 21. In order to prevent water from entering the actuator 1, a first sealing ring 31 is provided between the top of the temperature sensing element 3 and the inner wall of the through hole 121. The wire connection of the temperature sensing element 3 is located above the first sealing ring 31, so that the first sealing ring 31 can play a better sealing role between the metal temperature sensing element 3 and the connecting shaft 12.

[0049] Reference Figure 3 and Figure 4 The bottom of the housing 11 is provided with a mounting hole 112. The top of the connecting shaft 12 is provided with a raised edge, which is engaged in the mounting hole 112. A second sealing ring 124 is provided between the outer wall of the top of the connecting shaft 12 and the inner wall of the mounting hole 112. The connecting shaft 12 and the inner wall of the mounting hole 112 are sealed and fixed by glue injection, thereby sealing the mounting shaft and the housing 11 and preventing water from entering the actuator 1.

[0050] Reference Figure 3 and Figure 4The actuator includes an upper mounting base 131, a lower mounting base 132 located below the upper mounting base 131, a gear set 134 mounted between the upper mounting base 131 and the lower mounting base 132, and a motor 133 mounted above the upper mounting base 131 for driving the rotation of the drive gear of the gear set 134. A mounting groove 111 is provided at the bottom of the housing 11. The lower mounting base 132 is fixedly mounted in the mounting groove 111. A drive shaft 135 is coaxially mounted and fixedly connected to the driven gear of the gear set 134. The bottom end of the drive shaft 135 extends below the lower mounting base 132 and is connected to the top end of the connecting shaft 12. The top end of the drive shaft 135 extends above the upper mounting base 131. An angle sensor 16 is fixedly mounted on the top end of the drive shaft 135. Both the angle sensor 16 and the motor 133 are electrically connected to the circuit board 14. Circuit board 14 controls motor 133 to start, which in turn drives the active gear of gear set 134 to drive the driven gear and drive shaft 135 to rotate, so that drive shaft 135 drives connecting shaft 12, valve stem 21 and valve core 22 to rotate synchronously, and feeds back the rotation angle to circuit board 14 through angle sensor 16.

[0051] Reference Figure 4 and Figure 5 The connecting shaft 12 has a square-shaped upper mounting hole 112 at its top end and a square-shaped lower mounting hole 112 at its bottom end. The through hole 121 communicates with both the upper and lower mounting holes 112. The bottom end of the drive shaft 135 has a square cross-section that matches the upper mounting hole 112, and the top end of the valve stem 21 has a square cross-section that matches the lower mounting hole 112. The bottom end of the drive shaft 135 is inserted into the upper mounting hole 112 and is fixedly connected to the top end of the connecting shaft 12. The top end of the valve stem 21 is inserted into the lower mounting hole 112 and is fixedly connected to the bottom end of the connecting shaft 12.

[0052] Reference Figure 6 The drive shaft 135 has a through hole 1351 at the bottom and a horizontal wiring hole 1352 at the top. The wiring hole 1352 passes through both sides of the drive shaft 135. The wires of the temperature sensing element 3 are sequentially passed through the through hole 121 and the connection hole, and then pass out of the wiring hole 1352 and are electrically connected to the circuit board 14. This allows the temperature sensing element 3 and its wires to be located inside the unit valve, and ensures that the temperature sensing element 3 is easy to install and the wiring is simple and easy to connect.

[0053] The implementation principle of a unit valve with a built-in temperature sensing element in Embodiment 1 of this application is as follows: By setting the valve stem 21 as an internally hollow structure, and opening a wire hole 211 at its top, a through hole 121 in the connecting shaft 12, a connecting hole 1351 in the drive shaft 135, and a wiring hole 1352 at its top, the temperature sensing element 3 can be inserted into the valve stem 21, and the wire of the temperature sensing element 3 can be electrically connected to the circuit board 14 after passing through the through hole 121, the connecting hole 1351, and the wiring hole 1352 in sequence. Thus, the entire temperature sensing element 3 and the wire are located inside the unit valve, effectively preventing the wire of the temperature sensing element 3 from being exposed, and avoiding additional openings on the valve body 2 and the actuator 1, thereby enhancing the safety and sealing of the unit valve. Example 2:

[0054] The difference between this embodiment and Embodiment 1 is that, referring to... Figure 7 and Figure 8 A circular glue-filling groove 125 is provided at the top of the connecting shaft 12. The glue-filling groove 125 is located inside the upper connecting hole 122, and the cross-sectional dimension of the glue-filling groove 125 is smaller than that of the upper connecting hole 122. The temperature sensing element 3 is located inside the valve stem 21. The wire of the temperature sensing element 3 is sequentially passed through the wire hole 211, the through hole 121, the glue-filling groove 125, the connecting hole 1351, and the wiring hole 1352 before being electrically connected to the circuit board 14. The glue-filling groove 125 is used to seal and fix the wire of the connecting shaft 12 and the temperature sensing element 3. In other embodiments, when the temperature sensing element 3 is long enough, the glue-filling groove 125 is used to seal and fix the connecting shaft 12 and the temperature sensing element 3.

[0055] After the glue is injected into the glue injection tank 125, it seals the wire of the temperature sensing element 3 and the connecting shaft 12. If water accidentally enters from the joint of the connecting shaft 12, it can also prevent water from flowing into the actuator 1, thus enhancing the safety and sealing of the unit valve.

[0056] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] In the description of this invention, unless otherwise stated, the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] Finally, it should be noted that the above technical solution is only one embodiment of the present invention. For those skilled in the art, based on the application methods and principles disclosed in the present invention, it is easy to make various types of improvements or modifications, and not limited to the methods described in the above specific embodiments of the present invention. Therefore, the methods described above are only preferred and have no limiting significance.

Claims

1. A unit valve with built-in temperature measuring element, comprising an actuator (1) and a valve body (2), characterized in that, The valve body (2) is provided with a valve stem (21) connected to the actuator (1). The valve stem (21) has an internal hollow structure and a wire hole (211) with internal and external communication is provided at its top. A temperature measuring element (3) for measuring fluid temperature is inserted in the valve stem (21). The wire of the temperature measuring element (3) is passed through the wire hole (211) and electrically connected to the circuit board (14) inside the actuator (1).

2. The unit valve with a built-in temperature sensing element according to claim 1, characterized in that, The bottom of the valve stem (21) is located in the flow channel inside the valve body (2), and the bottom of the temperature measuring element (3) is located in the flow channel inside the valve body (2).

3. The unit valve with a built-in temperature sensing element according to claim 1, characterized in that, The actuator (1) is provided with a drive mechanism (13), and a connecting shaft (12) is provided between the drive mechanism (13) and the valve stem (21). The drive mechanism (13) drives the valve stem (21) to move through the connecting shaft (12).

4. A unit valve with a built-in temperature sensing element according to claim 3, characterized in that, The connecting shaft (12) has a through hole (121) with both ends through it. The wire of the temperature measuring element (3) passes through the through hole (121) and is electrically connected to the circuit board (14) inside the actuator (1).

5. A unit valve with a built-in temperature sensing element according to claim 4, characterized in that, A first sealing ring (31) is provided between the temperature measuring element (3) and the inner wall of the through hole (121), and the wire connection of the temperature measuring element (3) is located above the first sealing ring (31).

6. A unit valve with a built-in temperature sensing element according to claim 4, characterized in that, The top end of the connecting shaft (12) is provided with a glue injection groove (125), and the wires of the connecting shaft (12) and the temperature measuring element (3) or the connecting shaft (12) and the temperature measuring element (3) are sealed and fixed in the glue injection groove (125) by glue injection.

7. A unit valve with a built-in temperature sensing element according to any one of claims 3-6, characterized in that, The drive mechanism (13) includes a drive shaft (135) connected to the connecting shaft (12). The drive shaft (135) has a through hole (1351) at the bottom and a wiring hole (1352) at the top, which communicates with the through hole (1351). The wires of the temperature measuring element (3) are sequentially passed through the through hole (1351) and the wiring hole (1352) and are electrically connected to the circuit board (14) inside the actuator (1).

8. A unit valve with a built-in temperature sensing element according to claim 7, characterized in that, The wiring hole (1352) extends horizontally through both sides of the drive shaft (135).

9. A unit valve with a built-in temperature sensing element according to any one of claims 3-6, characterized in that, The actuator (1) includes a housing (11), the connecting shaft (12) passes through the bottom wall of the housing (11), and a second sealing ring (124) is provided between the connecting shaft (12) and the housing (11).

10. A unit valve with a built-in temperature sensing element according to any one of claims 1-6, characterized in that, The temperature measuring element (3) is in the shape of a round rod, and the wire of the temperature measuring element (3) is connected to its top.

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