Fusible alloy plug and heating intelligent balance valve

Abstract

The utility model relates to a fusible alloy plug and a heating intelligent balance valve, and belongs to the technical field of heating balance valves. The fusible alloy plug comprises a steel hollow bolt, the hollow bolt is provided with a through cavity along the axis, and the cavity is filled with fusible alloy with the melting point not higher than 180 DEG C. The fusible alloy plug is assembled in the connecting hole of the connecting flange of the intelligent balance valve, the bottom of the connecting hole is communicated with the outside, in the installation process of the intelligent balance valve, when the external temperature is too high, fusible alloy filled in the fusible alloy plug is heated to be molten and flows out of the bottom of the connecting hole, and the warning effect is achieved; and damage to a sealing element of the balance valve caused by high temperature in the mounting process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heating balancing valves, in particular to a fusible alloy plug and a heating intelligent balancing valve. Background Art

[0002] The heating intelligent balancing valve is a functional valve with good flow characteristics, valve opening indication, measurement and adjustment functions and remote control functions. It has been widely used in modern municipal heating. The valve body and actuator of the heating intelligent balancing valve are directly connected. The actuator has a built-in control system and rechargeable power supply, and has wireless controllability at long and short distances. A temperature sensor is set on the valve body to detect the water supply temperature in real time. The temperature sensor signal is connected to the control system of the actuator, and the valve body opening is controlled through the actuator to adjust the heating temperature.

[0003] The structural types of heating intelligent balancing valves are divided into floating type and fixed type; the sealing materials are generally: PTFE (polytetrafluoroethylene), nitrile rubber, fluororubber, PPL (para-polyphenylene), etc. In the actual installation process of heating intelligent balancing valves, the installation site is mostly at high altitude or high platform, pipeline well, manhole, corridor, pump room and other places, which is difficult to construct. The heating intelligent balancing valve and pipeline need to be constructed and installed at the same time. Because the construction needs to be installed and welded to the connecting flange, there is a situation where the valve body is heated up sharply simultaneously with the welding operations such as flange pipelines. At the same time, in the actual construction work, due to the difficulty of construction, it is difficult to avoid the situation that the staff wants to save time and effort, resulting in non-standard operation. For example, the valve body is connected and fixed first and then the pipeline flange is welded. This will inevitably cause high temperature to the valve body. When the temperature is too high, it will cause changes in the materials such as the valve body's seals and filling seals, which will affect the performance and normal use of the valve body. Utility Model Content

[0004] In order to solve the problems in the prior art, this utility model patent designs a fusible alloy plug and a heating intelligent balancing valve to solve the problem that the sealing components of the valve body are damaged by the high temperature generated by welding during the installation and construction of the existing heating intelligent balancing valve.

[0005] The technical solution adopted by the utility model is: a fusible alloy plug, the fusible alloy plug comprises a hollow bolt made of steel, the hollow bolt has a through cavity along the axis, and the cavity is filled with a fusible alloy with a melting point not higher than 180°C.

[0006] Furthermore, a circle of annular groove is formed on the bottom surface of the nut of the hollow bolt, and a sealing ring is embedded in the groove.

[0007] A heating intelligent balancing valve, which includes a valve body, and the outer peripheral surfaces of the connecting flanges on both sides of the valve body are radially opened with internally threaded connecting holes, the internal thread size of the connecting hole is compatible with the external thread of the hollow bolt of the fusible alloy plug as described above, the fusible alloy plug as described above is threadedly connected in the connecting hole of the connecting flange, and a transverse hole is arranged at the bottom end of the connecting hole to communicate with the back side of the connecting flange.

[0008] Furthermore, the depth of the connecting hole is greater than the length of the hollow bolt.

[0009] Furthermore, the connecting hole is opened at the upper part of the connecting flange, and the outer end position of the transverse hole is inclined downward.

[0010] Furthermore, a through hole is opened on the tube neck of the valve body, and a temperature sensor is sealed and assembled in the through hole.

[0011] Compared with the prior art, the advancement of the fusible alloy plug and the heating intelligent balancing valve designed by the utility model patent lies in that the fusible alloy filled in the hollow bolt of the fusible alloy plug is an alloy made of bismuth, lead, tin and cadmium, with a melting point below 180°C, and will melt into liquid in a high temperature environment; during the installation and construction of the heating intelligent balancing valve, when the pipe connected to the balancing valve is welded and assembled, the heat generated by the welding operation will be transferred to the balancing valve through the pipe, and the fusible alloy plug installed on the balancing valve will be heated. When the temperature is higher than the melting point of the fusible alloy, the fusible alloy will melt and flow out from the transverse hole at the bottom of the connecting hole, thereby reminding the installer that the operating temperature is too high at this time, which will damage the sealing components of the valve body, and the welding work needs to be stopped and the installation construction can be carried out after cooling. Through the reminder of the fusible alloy plug, the welding installation process can be prevented from affecting the sealing components of the valve body. Since the fusible alloy plug is assembled on the connecting flange, it can sense the temperature transmitted by the pipeline at the first time, and the warning effect is more timely and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of a fusible alloy plug.

[0013] Figure 2 It is a schematic diagram of the cross-sectional structure of the fusible alloy plug.

[0014] Figure 3 It is a structural diagram of the heating intelligent balancing valve.

[0015] Figure 4 It is a schematic diagram of the cross-sectional structure of the heating intelligent balancing valve.

[0016] In the figure, 1 is a hollow bolt, 2 is a fusible alloy, 3 is a valve body, 4 is a temperature sensor, 11 is a nut, 12 is a slot, 13 is a cavity, 14 is a sealing ring, 31 is a connecting flange, 32 is a connecting hole, and 33 is a transverse hole. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. The technical solutions in the embodiments of the utility model are clearly and completely described, and the described embodiments are only embodiments of a part of the invention, not all of it. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention. Example 1

[0018] like Figure 1 , 2 As shown, the utility model patent designs an embodiment of a fusible alloy plug. In this embodiment, the fusible alloy plug includes a hollow bolt 1 made of steel. The hollow bolt 1 has a through cavity 13 along the axis. The lower half of the cavity 13 is filled with a fusible alloy 2 with a melting point not higher than 180°C. The fusible alloy 2 is an alloy made of elements such as bismuth, lead, tin and cadmium. The melting point is lower than 180°C. It is a grayish white shiny metal with a strength of 30MPa at room temperature, an elongation of 3%, a hardness of 25HBS, and good fluidity after being melted by heat. A ring-shaped groove 12 is formed on the bottom surface of the nut 11 of the hollow bolt 1. A sealing ring 14 is embedded in the groove 12 when in use. Example 2

[0019] like Figure 3 , 4 As shown, the utility model patent designs an embodiment of a heating intelligent balancing valve. In this embodiment, the heating intelligent balancing valve includes a valve body 3, and a through hole is opened on the neck of the valve body 3, and a temperature sensor 4 is sealed and assembled in the through hole. The upper side of the outer peripheral surface of the connecting flange 31 on both sides of the valve body 3 is respectively provided with an internal threaded connecting hole 32 along the vertical diameter direction. The internal thread size of the connecting hole 32 is adapted to the external thread of the hollow bolt 1 of the fusible alloy plug described in Example 1. The connecting holes 32 of the connecting flange 31 on both sides of the valve body 3 are respectively threadedly connected with the fusible alloy plug described in Example 1. A transverse hole 33 is arranged at the bottom end of the connecting hole 32 to communicate with the back of the connecting flange 31, and the outer end position of the transverse hole 33 is slightly inclined downward to facilitate the outflow of the internal liquid.

[0020] When the heating intelligent balancing valve disclosed in the utility model patent is installed, the welding heat during the pipeline welding process will be transferred to the valve body 3 along the pipeline, and the transferred heat will be first sensed by the connecting flange 31. When the temperature is higher than the melting point of the fusible alloy 2 in the fusible alloy plug, the fusible alloy 2 will automatically melt into liquid and flow to the outside of the connecting flange 31 along the transverse hole 33. This reminds the installer to stop the welding operation to prevent the high temperature from affecting the sealing element of the valve body 3.

[0021] The above contents are only preferred embodiments of the present invention and cannot be used to limit the scope of implementation of the present invention. That is, any simple equivalent changes and modifications made according to the claims and description of the present invention are still within the scope of the present invention.

Claims

1. A heating intelligent balancing valve, comprising a valve body, characterized in that: The outer circumferential surfaces of the connecting flanges on both sides of the valve body are respectively radially provided with connecting holes with internal threads, and fusible alloy plugs are threadedly connected in the connecting holes of the connecting flanges. The fusible alloy plug comprises a hollow steel bolt, and the hollow bolt has a through cavity along the axis, and the cavity is filled with a fusible alloy with a melting point not higher than 180°C. An annular groove is formed on the bottom surface of the nut of the hollow bolt, and a sealing ring is embedded in the groove. The internal thread size of the connecting hole is compatible with the external thread of the hollow bolt of the fusible alloy plug, and a transverse hole is provided at the bottom end of the connecting hole to communicate with the back side of the connecting flange.

2. The intelligent heating balancing valve according to claim 1, characterized in that: The depth of the connecting hole is greater than the length of the hollow bolt.

3. The intelligent heating balancing valve according to claim 2, characterized in that: The connecting hole is opened at the upper part of the connecting flange, and the outer end position of the transverse hole is inclined downward.

4. The intelligent heating balancing valve according to claim 3, characterized in that: A through hole is formed on the tube neck of the valve body, and a temperature sensor is assembled in the through hole.

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