Built-in sensor control valve

Abstract

The utility model discloses a concealed sensor control valve which comprises a valve body and an actuator connected with the valve body and provided with an output shaft, a valve seat connected with a valve element and a valve rod connected with the valve element and connected to the output shaft are arranged in the valve body, and a gasket and an O-shaped ring which are connected with the inner wall of the valve body in a sealed mode are arranged on the periphery of the middle of the valve rod in a sleeved mode. The upper portion of the valve rod is sleeved with filler and a filler gland located above the filler, containing through holes which are located on the same axis, are of the same structure and are used for containing a sensor wire are formed in the axial direction of the output shaft and the axial direction of the valve rod, and a sealing plug surrounding the sensor wire is arranged at the communicating position of the two containing through holes. The inner wall of the lower end of the valve rod is connected to the sensor probe, and the inner wall of the lower end of the valve rod is connected to the sensor probe. According to the utility model, the sensor lead can be prevented from being exposed, the measurement precision of the temperature sensor in the valve body is ensured, the sensor probe is prevented from loosening when being impacted by liquid, and the sealing performance and the stability of the sensor probe are ensured.

Description

Technical Field

[0001] This utility model relates to the field of control valve technology, and in particular to a built-in sensor control valve. Background Technology

[0002] In the modern HVAC industry, precise temperature control is crucial for ensuring heating quality and energy efficiency. Heating systems require highly precise regulation of hot water or steam flow based on the diverse needs of different areas and time periods to ensure stable and comfortable indoor temperatures. In this process, temperature-sensing electrically operated regulating valves play a key role. They monitor the temperature of the medium flowing through the valve in real time and promptly feed the data back to the control system. With this precise temperature feedback, the control system can accurately calculate and adjust the opening of the electrically operated regulating valves, effectively preventing overheating or overcooling, greatly improving heating comfort, and significantly increasing energy efficiency.

[0003] However, traditional temperature sensor installation methods have many drawbacks. For a long time, temperature sensors have typically been mounted on the valve body via external threaded holes, leaving the sensor wires completely exposed between the sensor and the actuator. In actual operation, especially under extreme weather conditions such as heavy rain, blizzards, strong winds, or extreme cold or heat, the connection between the valve body and the sensor is prone to leaks due to drastic temperature changes, mechanical stress variations, or erosion from rainwater and snow. Once a leak occurs, it not only affects the temperature sensor's measurement accuracy but may also cause deviations in the heating system's regulation, reducing heating efficiency.

[0004] More seriously, exposed sensor wires and sensor bodies are susceptible to human-caused damage. In some complex usage environments, such as public places, industrial plants, or areas with poor property management, there may be human error or malicious damage, which could very likely cause the heating system to malfunction in collecting temperature signals, thereby causing the heating regulation system to fail and seriously affecting the normal operation of heating. Utility Model Content

[0005] To address the technical problems of existing technologies, such as the temperature sensor's wires being completely exposed between the sensor and actuator, the valve body and sensor connection being prone to sealing leaks due to extreme weather, affecting the temperature sensor's measurement accuracy, and the sensor being susceptible to human-caused damage, thus affecting the normal operation of the heating system, this utility model provides the following technical solution.

[0006] This utility model discloses a built-in sensor control valve, comprising a valve body and an actuator connected to the valve body and having an output shaft. The valve body has a valve seat connected to a valve core and a valve stem connected to the valve core and connected to the output shaft. The outer periphery of the middle part of the valve stem is fitted with a gasket and an O-ring that are sealed to the inner wall of the valve body. The upper part of the valve stem is fitted with packing and a packing gland located above the packing. The output shaft and the valve stem both have identical receiving through holes on the same axis for accommodating sensor wires. A sealing plug is provided at the connection point of the two receiving through holes, surrounding the sensor wires. The lower end of the sensor wires is connected to a sensor probe that extends from the lower end of the valve stem into the inner cavity of the valve core. The inner wall of the lower end of the valve stem is connected to the sensor probe.

[0007] As a further technical solution, the lower end of the valve stem is provided with an internal thread, and the external thread of the sensor probe is connected to the internal thread.

[0008] As a further technical solution, a check screw is threaded onto the outer wall of the valve stem, and the check screw penetrates the outer wall of the valve stem and abuts against the external thread of the sensor probe.

[0009] As a further technical solution, a blind hole matching the end of the anti-reverse screw is provided at the external thread of the sensor probe.

[0010] As a further technical solution, the head of the check screw faces the opposite direction to the liquid flow direction inside the valve core.

[0011] As a further technical solution, the inner wall of the lower end of the valve stem is welded and sealed to the outer wall of the sensor probe.

[0012] The beneficial effects of this invention are as follows: The sensor wire is concealed within the receiving through-hole of the valve stem and output shaft, and a sealing plug is used to seal the connection between the valve stem and output shaft. This prevents the sensor wire from being exposed, protects it from extreme weather conditions, and prevents it from being damaged, thus ensuring the measurement accuracy of the temperature sensor within the valve body and guaranteeing the normal operation of the heating system. After the sensor probe is fixed to the threaded connection at the lower end of the valve body, a check screw penetrates the valve body and extends into the receiving through-hole to fix the threaded portion of the sensor probe. This prevents the sensor probe from loosening due to liquid impact, ensuring the sealing and stability of the sensor probe and guaranteeing the accuracy of temperature measurement during heating. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the built-in sensor control valve of this utility model;

[0014] Figure 2 This is a schematic diagram of the valve core of the built-in sensor control valve of this utility model;

[0015] Figure 3 This is a schematic diagram of the internal actuator of the built-in sensor control valve of this utility model;

[0016] Figure 4 This is a schematic diagram of the connection of the sensor probe of the built-in sensor control valve of this utility model;

[0017] Figure 5 This is a planar cross-sectional schematic diagram of the built-in sensor control valve of this utility model;

[0018] In the diagram: 1-Valve body; 2-Actuator; 3-Valve core; 4-Valve seat; 5-Gasket; 6-Valve stem; 601-Internal thread; 7-O-ring; 8-Packing; 9-Packing gland; 10-Sensor probe; 11-Sealing plug; 12-Output shaft; 13-Accommodation through hole; 14-Check screw; 15-Sensor wire. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0020] In the description of this utility model, it should be understood that the terms "upper" and "lower" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] like Figure 1 and Figure 2 As shown, this utility model discloses a built-in sensor control valve, comprising a valve body 1 and an actuator 2 connected to the valve body 1 and equipped with an output shaft 12. The valve body 1 is connected to a heating pipeline, and the actuator 2 is bolted to the valve body 1 for controlling the liquid flow rate in the pipeline. Except for the output shaft 12, the other structures of the actuator 2 adopt existing technology, therefore the specific structure of the actuator 2 will not be described in detail.

[0022] The valve body 1 contains a valve seat 4, which is connected to a valve core 3. The valve core 3 is used to open and close the pipeline and control its flow. A valve stem 6 is fixedly connected to the valve core 3. The valve stem 6 is connected to an output shaft 12. The actuator 2 controls the rotation of the output shaft 12, which in turn controls the valve core 3 via the valve stem 6, thereby controlling the flow rate of the liquid in the pipeline. To ensure the sealing within the valve body 1, a gasket 5 and an O-ring 7 are fitted around the outer periphery of the middle section of the valve stem 6, sealingly connecting with the inner wall of the valve body 1. A packing 8 and a packing gland 9 are fitted on the upper part of the valve stem 6.

[0023] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in a preferred embodiment, the output shaft 12 and the valve stem 6 both have identical accommodating through holes 13 along their axial directions. The two accommodating through holes 13 are on the same axis and are used to accommodate the sensor wire 15 and mount the sensor probe 10. Specifically, the temperature sensor wire 15 passes through the accommodating through hole 13 at the upper part of the output shaft 12 and extends to the accommodating through hole 13 at the lower part of the valve stem 6. The sensor probe 10 is then mounted at the lower end of the valve stem 6, with its sensing end located within the valve core 3 cavity, enabling accurate temperature measurement of the liquid flowing through the valve core 3.

[0024] A sealing plug 11 is provided at the junction of the two receiving through holes 13 to surround the sensor wire 15. The sealing plug 11 can separate and seal the upper and lower receiving through holes 13 to prevent liquid in the pipe from flowing into the actuator 2.

[0025] In a preferred embodiment, the lower end of the valve stem 6 has an internal thread 601 on its inner wall. The external thread of the sensor probe 10 is connected to the internal thread 601, thereby allowing the sensor probe 10 to be fixedly connected to the lower end of the valve stem 6. The sensor wire 15 at its upper end passes through the receiving through hole 13 in the valve stem 6, through the sealing plug 11, and extends to the receiving through hole 13 in the output shaft 12. Then, it exits from the output shaft 12 and connects to the control component in the actuator 2. Of course, the sensor probe 10 is not limited to being threadedly connected to the valve stem 6. In another embodiment, the lower end of the valve stem 6 can also be welded and sealed to the outer wall of the sensor probe 10.

[0026] In a preferred embodiment, after the external thread of the sensor probe 10 is connected to the internal thread 601, a check screw 14 is threadedly connected to the outer wall of the valve stem 6 to prevent the sensing end of the sensor probe 10 inside the valve core 3 from loosening after prolonged liquid impact. At this time, a threaded hole matching the external thread of the check screw 14 is opened on the outer wall of the valve stem 6. The thread of the check screw 14 penetrates the outer wall of the valve stem 6 and abuts against the external thread of the sensor probe 10, thereby securing the sensor probe 10 and preventing it from loosening when impacted by liquid.

[0027] In a preferred embodiment, the head of the check screw 14 faces the opposite direction to the liquid flow direction within the valve core 3, preventing the check screw 14 mounted on the outer wall of the valve stem 6 from loosening. A blind hole matching the end of the check screw 14 is provided at the external thread of the sensor probe 10. After the thread of the check screw 14 passes through the outer wall of the valve stem 6, its end can be inserted into the blind hole of the external thread of the sensor probe 10, further ensuring the stability of the sensor probe 10 relative to the valve stem 6 and preventing it from loosening due to impact from the liquid within the valve core 3, thus ensuring the sealing and stability of the sensor probe 10.

[0028] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent substitutions can be made without departing from the concept of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A built-in sensor control valve, comprising a valve body (1) and an actuator (2) connected to the valve body (1) and having an output shaft (12), wherein the valve body (1) contains a valve seat (4) connected to a valve core (3) and a valve stem (6) connected to the valve core (3) and connected to the output shaft (12), wherein a gasket (5) and an O-ring (7) sealingly connect to the inner wall of the valve body (1) are fitted around the middle outer periphery of the valve stem (6), and a packing (8) and a packing gland (9) located above the packing (8) are fitted on the upper part of the valve stem (6), characterized in that: The output shaft (12) and the valve stem (6) are both provided with the same structure of receiving through holes (13) for accommodating the sensor wire (15) on the same axis. A sealing plug (11) is provided at the connection of the two receiving through holes (13) and surrounds the sensor wire (15). The lower end of the sensor wire (15) is connected to a sensor probe (10) that extends from the lower end of the valve stem (6) into the inner cavity of the valve core (3). The inner wall of the lower end of the valve stem (6) is connected to the sensor probe (10).

2. The built-in sensor control valve according to claim 1, characterized in that: The valve stem (6) has an internal thread (601) on its lower inner wall, and the external thread of the sensor probe (10) is connected to the internal thread (601).

3. The built-in sensor control valve according to claim 2, characterized in that: The valve stem (6) is threaded with a check screw (14), which penetrates the outer wall of the valve stem (6) and abuts against the external thread of the sensor probe (10).

4. The built-in sensor control valve according to claim 3, characterized in that: The sensor probe (10) has a blind hole at its external thread that matches the end of the anti-reverse screw (14).

5. The built-in sensor control valve according to claim 3, characterized in that: The head of the anti-reverse screw (14) faces the opposite direction of the liquid flow direction inside the valve core (3).

6. The built-in sensor control valve according to claim 1, characterized in that: The lower end of the valve stem (6) is welded and sealed to the outer wall of the sensor probe (10).

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