Air valve with temperature control chain reaction

Abstract

The utility model relates to the field of air valves, in particular to an air valve with temperature control chain reaction, which comprises a valve body connected to a ventilation pipe, a plurality of blades rotatably arranged in the valve body and a driving actuator arranged outside the valve body, the plurality of blades are uniformly arranged in the valve body, and the driving actuator is arranged outside the valve body. The multiple rotating blades control opening or closing of the interior of the valve body, and the actuator controls the multiple blades to be opened or closed synchronously. The valve body is provided with a temperature control device electrically connected with the actuator, the temperature control device comprises a temperature sensor element arranged on the valve body in a penetrating mode, the temperature detection end of the temperature sensor element extends into the valve body, and the temperature sensor element is electrically connected to a power supply circuit for driving the actuator. The air valve has the effect that the air valve can be closed in time under the special conditions such as fire disasters.

Description

Technical Field

[0001] The present application relates to the field of air valves, and in particular to an air valve with a temperature control chain reaction. Background Art

[0002] Ventilation pipes are usually used in the air purification industry. In some production enterprises, a large amount of flue gas containing pollutants is often generated. In order to deal with these flue gases, it is necessary to install air purification equipment outside the factory building and connect ventilation pipes between the factory building and the air purification equipment. Air valves need to be installed in the ventilation pipes. When the air valves are opened, the flue gas passes through the ventilation pipes and enters the purification equipment. Electric air valves are used as gas medium flow adjustment or cut-off devices in dusty cold or hot air gas pipelines of ventilation and environmental protection projects in hardware, chemical, building materials, power stations, glass and other industries.

[0003] Electric air valve is a non-sealed valve body, which usually uses a motor to drive the blades in the valve to rotate. By adjusting the gap between the blades, it is used to connect, close or adjust the amount of the medium. The valve body is designed and manufactured in a new structure of stainless steel sheet metal. The blades are softly overlapped, so the sealing performance is good, the structure is compact, the flow resistance is large, the flow volume is large, and it is resistant to high temperature gas. It is easy to operate, reliable, and has a long service life.

[0004] The electric dampers currently in use are usually opened when the power is on and closed when the power is off. When a fire or other special situation occurs in the environment where the electric dampers are installed, the electric dampers need to be manually or remotely controlled in accordance with the feedback from other equipment in the room or other monitoring sensors. Since the circuit between the central control room and the electric dampers to be controlled is too long and there are too many joints, it is easy for the electric dampers to be controlled in time, causing the temperature inside the ventilation duct to rise sharply. Utility Model Content

[0005] In order to enable the air valve installed on the ventilation duct to respond quickly and close in time in special circumstances such as fire, the present application provides an air valve with a temperature control chain reaction.

[0006] The present application provides a damper with a temperature control chain reaction, which adopts the following technical solution:

[0007] A wind valve with a temperature control chain reaction, comprising a valve body connected to a ventilation pipe, a plurality of blades rotatably arranged inside the valve body, and a driving actuator arranged outside the valve body, wherein the plurality of blades are evenly arranged inside the valve body, and the plurality of rotating blades control the opening or closing of the inside of the valve body, and the actuator controls the synchronous opening or closing of the plurality of blades; a temperature control device electrically connected to the actuator is arranged on the valve body, and the temperature control device comprises a temperature sensor element penetrating the valve body, an end of the temperature sensor element for detecting temperature extends into the interior of the valve body, and the temperature sensor element is electrically connected to a power supply circuit of the driving actuator.

[0008] By adopting the above technical scheme, in special circumstances such as fire, the temperature of the air passing through the ventilation duct gradually increases, and the set temperature sensor element can detect the temperature in the ventilation duct. When the temperature in the ventilation duct exceeds the set temperature of the temperature sensor element, the temperature sensor element can transmit a signal to the drive actuator, so that the drive actuator controls the blades in the valve body to close the inside of the valve body, thereby preventing the high-temperature hot air in the ventilation duct from being transported to other delivery pipes; the set temperature sensor element can monitor the temperature in the ventilation duct in real time. When the temperature in the ventilation duct rises, the valve body can be controlled in time, avoiding the need for remote control by the central control system.

[0009] Optionally, a fuse is provided inside the temperature sensor element, and the fuse is connected to the drive actuator.

[0010] By adopting the above technical solution, the fuse arranged inside the temperature sensor element breaks after the melting temperature of the fuse is reached, thereby transmitting a signal to the drive actuator and generating a corresponding action, and the arranged fuse can be selected, so that the staff can select fuses with different temperature ranges in different occasions, thereby improving the applicable scenarios of the temperature sensor element.

[0011] Optionally, the temperature control device further comprises a junction box detachably fixed to the outer wall of the valve body, and the end of the temperature sensor element away from the valve body is connected to the inside of the junction box.

[0012] By adopting the above technical solution, the arranged junction box can provide protection for the temperature sensor element, thereby preventing the temperature factors in the external environment from affecting the accuracy of the temperature sensor element in detecting the air temperature inside the valve body.

[0013] Optionally, a micro switch and a spring return member are installed inside the junction box, and the spring return member includes a return rod rotatably arranged on the inner wall of the junction box and a return spring connected to the return rod, the end of the return rod away from its rotation point is connected to the end of the temperature sensor element, and the return spring is connected to the rotating end of the return rod, one end of the return spring is fixed to the inner wall of the junction box, and the other end is fixed to the return rod, the micro switch is connected to a power supply line and a return line, and the micro switch is provided with switch contacts, the return rod contacts with the switch contacts to cut off the power to the drive actuator, or the return rod is disconnected from the switch contacts to energize the drive actuator.

[0014] By adopting the above technical solution, when the temperature sensor element detects that the temperature of the air passing through the inside of the valve body reaches the melting temperature of the fuse, the reset rod, under the action of the reset spring, can contact the switch contacts on the micro switch. After the switch contacts on the micro switch are pressed, a signal can be transmitted to the drive actuator to cut off the power to the drive actuator and control multiple blades to close the vents inside the valve body. When detecting the temperature at the site of use, a mechanical linkage structure is used to implement the action. The mechanical structure can withstand complex working environments and avoid equipment failures in high temperature environments.

[0015] Optionally, a mounting hole is provided on the valve body at a position where the temperature sensor element is penetrated, and an end portion of the temperature sensor element for detecting temperature is penetrated through the mounting hole.

[0016] By adopting the above technical solution, the mounting hole provided on the valve body can facilitate the staff to extend the temperature detection end of the temperature sensor element into the interior of the valve body, thereby providing accuracy in detecting the temperature inside the valve body.

[0017] Optionally, an inspection opening is provided on a side of the junction box away from the valve body, and an inspection cover is installed at the inspection opening.

[0018] By adopting the above technical solution, the inspection port provided on the junction box makes it convenient for the staff to repair the faulty equipment components, and the inspection cover plate provided keeps the junction box in a closed state when not being repaired, thereby preventing impurities in the working environment from entering the interior of the junction box.

[0019] Optionally, a plurality of magnetic elements are provided on the side of the junction box facing the valve body, and the magnetic elements can be adsorbed on the outer wall of the valve body.

[0020] By adopting the above technical solution, when in use, the junction box can be adsorbed on the outer wall of the valve body, which has the advantage of easy installation. When improving the existing valve body, there is no need to perform excessive processing on the existing valve body, and the manufactured junction box can be directly adsorbed on the valve body. The installation is convenient and quick. When a major failure occurs in the equipment inside the junction box and cannot be repaired in a short time, the staff can quickly remove the junction box from the valve body, repair it and then install it on the valve body, avoiding the need for staff to operate at high altitude for a long time.

[0021] Optionally, a supporting box is fixed on the outer wall of the valve body, and the junction box is plugged into the supporting box.

[0022] By adopting the above technical solution, the ventilation duct will vibrate during high-air-volume ventilation, and the support box can provide support for the junction box to prevent the junction box from falling off the valve body.

[0023] Optionally, a heat insulating pad is provided on the contact surface between the junction box and the valve body.

[0024] By adopting the above technical solution, the insulation pad can insulate the junction box to prevent the high temperature of the air passing through the valve body from being transmitted to the inside of the junction box, causing heat damage to the equipment inside.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. Through the coordinated use of the set temperature sensor element, spring reset device and micro switch, the temperature in the ventilation duct can be detected in real time. When the air temperature rises, the drive actuator can be controlled in time, avoiding the need for feedback from other sensors, allowing the hollow control system to control. At the same time, the set equipment is directly connected to the drive actuator, with fewer line connections, which is convenient for later inspection and maintenance;

[0027] 2. In case of fire or other emergency, the air temperature in the ventilation duct reaches the temperature of the temperature sensor fuse, and the valve automatically closes. In this way, there is only one power supply line from the valve body to the central control system, and the function can be realized without the participation of multiple devices, which is convenient for on-site installation and debugging. If there are any problems in the later use, you only need to check whether the power supply line at the valve body junction box is normal. The installation of the junction box is simple, low-cost, and simple to wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0029] Figure 2 It is a schematic diagram of the mounting hole according to the embodiment of the present application.

[0030] Figure 3It is a schematic diagram of the internal structure of the temperature control device according to an embodiment of the present application.

[0031] Figure 4 It is a schematic diagram of a magnetic attraction component and a thermal insulation pad according to an embodiment of the present application.

[0032] Figure 5 It is a connection circuit diagram of a junction box and a drive actuator according to an embodiment of the present application.

[0033] Explanation of the reference numerals: 1. valve body; 11. blade; 12. drive actuator; 2. temperature control device; 21. junction box; 22. temperature sensor element; 23. micro switch; 231. switch contact; 24. spring return member; 241. return rod; 242. fixed shaft; 243. return spring; 25. inspection port; 26. inspection cover; 27. magnetic member; 28. thermal insulation pad; 29. ​​support box; 3. mounting hole. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-5 This application is described in further detail.

[0035] The embodiment of the present application discloses a damper with a temperature control chain reaction.

[0036] Example 1

[0037] Reference Figure 1 , a wind valve with a temperature control chain reaction includes a valve body 1 connected to a ventilation pipe and used to control ventilation or non-ventilation of the ventilation pipe. The cross section of the valve body 1 is the same as the cross section of the ventilation pipe. When in use, the valve body 1 is installed at the connection of two adjacent sections of the ventilation pipe. The valve body 1 is a rectangular frame structure. A plurality of rectangular blades 11 are rotatably connected inside the valve body 1. The length direction of the blades 11 is the same as the length direction of the valve body 1, and the plurality of blades 11 are evenly arranged along the width direction of the valve body 1. By rotating the plurality of blades 11 arranged inside the valve body 1, the opening or closing of the inside of the valve body 1 can be controlled. When the plurality of blades 11 are rotated into a horizontal state at the same time, The valve body 1 is open, and when multiple blades 11 rotate to a vertical state at the same time, the valve body 1 is closed; a driving actuator 12 is fixed on the outer wall of the valve body 1, and the driving actuator 12 is connected to one of the blades 11 to control the rotation of the blade 11. A connecting rod assembly is provided on the side of the valve body 1 away from the driving actuator 12. When the driving actuator 12 controls the rotation of one of the blades 11, under the action of the connecting rod assembly, multiple blades 11 are driven to move at the same time. In the embodiment of the present application, the driving actuator 12 can be a driving motor, and the output end of the driving motor is connected to the end of the blade 11. Under the action of the power system, the valve body 1 is normally open when power is on and closed when power is off.

[0038] Reference Figure 1 and Figure 2A temperature control device 2 for monitoring the air temperature inside the ventilation duct is arranged on the outer wall of the valve body 1 and on one side close to the driving actuator 12. The temperature control device 2 includes a junction box 21 installed on the outer wall of the valve body 1. A temperature sensor element 22 is fixed inside the junction box 21. The temperature sensor element 22 is vertically penetrated inside the junction box 21, and the end of the temperature sensor element 22 for monitoring the temperature extends to the outside of the junction box 21. A mounting hole 3 is opened on the outer wall of the valve body 1. The temperature monitoring end of the temperature sensor element 22 is penetrated from the mounting hole 3 to the inside of the valve body 1, so as to facilitate the monitoring of the air temperature passing through the inside of the valve body 1. A fuse is arranged inside the temperature sensor element 22. When the air temperature passing through the ventilation duct is high, the fuse can be melted. When in use, a fuse that can withstand different temperatures can be selected according to actual needs. The temperature range in which the fuse can be selected is: 70-280℃.

[0039] Reference Figure 2 and Figure 3A micro switch 23 and a spring return member 24 are also installed inside the junction box 21. The micro switch 23 and the spring return member 24 are in contact and connected. The spring return member 24 includes a return rod 241 rotatably arranged on the inner wall of the junction box 21. A fixed shaft 242 is arranged at the rotation point of the return rod 241. The fixed shaft 242 is vertically fixed on the junction box 21. The fixed shaft 242 passes through the end of the return rod 241 and is rotatably connected. The return rod 241 extends away from the end of the fixed shaft 242 toward the temperature sensor element 22, and The end of the reset rod 241 is overlapped on the end of the temperature sensor element 22 located in the junction box 21, and a reset spring 243 is sleeved on the fixed shaft 242. One end of the reset spring 243 is fixed to the inner wall of the junction box 21, and the other end is fixed to the reset rod 241. Under the action of the reset spring 243, the end of the reset rod 241 can be pressed against the temperature sensor element 22; the micro switch 23 is connected with a power supply line and a return line, the power supply line is connected to the power supply system, and the return line is connected to the drive actuator 12. A switch contact 231 is provided on the side of the valve body 23 and facing the reset rod 241. The switch contact 231 is in contact with the reset rod 241. When the reset rod 241 contacts the open contact, the micro switch 23 transmits a signal to power off the drive actuator 12 and close the valve body 1. When the reset rod 241 and the switch contact 231 are disconnected, the micro switch 23 transmits a signal to power on the drive actuator 12 and open the valve body 1. When the air temperature passing through the valve body 1 is too high and reaches the temperature sensor element 22, the temperature sensor element 22 is opened. After the melting temperature of the fuse is reached, the fuse melts, causing the reset rod 241 and the temperature sensor element 22 to be out of contact. Under the action of the reset spring 243, the reset rod 241 contacts the switch contact 231 on the micro switch 23, so that the valve body 1 is in a closed state, preventing the high-temperature gas in the ventilation duct from passing into other environments; when the temperature in the use environment drops, the staff inspects and maintains the equipment inside the junction box 21, and replaces a new temperature sensor element 22, so that the valve body 1 returns to normal and is in a normally open state.

[0040] Reference Figure 1 and Figure 3 An inspection port 25 is provided on the side of the junction box 21 away from the valve body 1. When a failure occurs in a device component inside the junction box 21, it is convenient for the staff to carry out maintenance. An inspection cover 26 is slidably fitted at the inspection port 25. When the inside of the junction box 21 needs to be inspected, the staff opens the inspection cover 26. When in use, the inspection cover 26 is in a closed state to prevent impurities in the working environment from entering the inside of the junction box 21.

[0041] Reference Figure 1 and Figure 4, a plurality of magnetic elements 27 are provided on the side of the junction box 21 facing the valve body 1. In the embodiment of the present application, the magnetic element 27 is a magnet. When in use, the junction box 21 can be adsorbed on the outer wall of the valve body 1, which has the advantage of easy installation. When improving the existing valve body 1, there is no need to perform excessive processing on the existing valve body 1. The manufactured junction box 21 can be directly adsorbed on the valve body 1. The installation is convenient and quick. When a major failure occurs in the equipment inside the junction box 21 and cannot be repaired in a short time, the staff can quickly remove the junction box 21 from the valve body 1, repair it, and then install it on the valve body 1, avoiding the need for long-term high-altitude operation by the staff.

[0042] Reference Figure 1 and Figure 4 A heat insulating pad 28 is bonded to the side of the junction box 21 facing the valve body 1. When the junction box 21 is adsorbed on the side wall of the valve body 1, the heat insulating pad 28 can insulate the junction box 21 to prevent the high temperature of the air passing through the inside of the valve body 1 from being transmitted to the inside of the junction box 21 and causing heat damage to the equipment inside; a support box 29 is fixed on the outer wall of the valve body 1 and below the junction box 21. The junction box 21 is plugged into the support box 29. During high-volume ventilation, the ventilation duct will vibrate. The support box 29 can provide support for the junction box 21 to prevent the junction box 21 from falling off the valve body 1.

[0043] The implementation principle of Example 1 is as follows: when the valve body 1 is controlling the ventilation inside the ventilation duct, the temperature sensor element 22 can detect the temperature inside the ventilation duct in real time. When the temperature reaches the maximum temperature that the temperature sensor element 22 can withstand, the fuse in the temperature sensor element 22 melts, and under the action of the reset spring 243, the reset rod 241 contacts the switch contact 231 on the micro switch 23, transmitting a signal to the drive actuator 12, causing the drive actuator 12 to automatically cut off the power, and then closing the valve body 1, thereby preventing the high-temperature air in the ventilation duct from being transported to other ventilation ducts.

[0044] Example 2

[0045] Reference Figure 1 The difference between this embodiment and embodiment 1 is that a PLC controller and a temperature sensor are arranged inside the junction box 21, and the temperature detection end of the temperature sensor is arranged inside the valve body 1 through the mounting hole 3 to detect the air temperature passing through the valve body 1 in real time. The PLC controller is electrically connected to the temperature sensor and the drive actuator 12 respectively, and the target temperature of the temperature sensor is set by the PLC controller. When the air temperature inside the valve body 1 reaches the set temperature of the temperature sensor, a signal is transmitted to the PLC controller, and then the PLC controller controls the drive actuator 12 to close the valve body 1.

[0046] The implementation principle of Example 2 is: through the coordinated use of the PLC controller and the temperature sensor, the temperature of the gas passing through the valve body 1 is detected in real time. When the temperature reaches the target temperature, the PLC controller can automatically close the blade 11 in the valve body 1.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A damper with a temperature control chain reaction, characterized in that: The invention comprises a valve body (1) connected to a ventilation pipe, a plurality of blades (11) rotatably arranged inside the valve body (1), and a driving actuator (12) arranged outside the valve body (1), wherein the plurality of blades (11) are evenly arranged inside the valve body (1), and the plurality of rotating blades (11) control the opening or closing of the inside of the valve body (1), and the actuator controls the synchronous opening or closing of the plurality of blades (11); the valve body (1) is provided with a temperature control device (2) electrically connected to the actuator, and the temperature control device (2) comprises a temperature sensor element (22) penetrating the valve body (1), the temperature detecting end of the temperature sensor element (22) extends into the inside of the valve body (1), and the temperature sensor element (22) is electrically connected to the power supply line of the driving actuator (12).

2. The air valve with temperature control chain reaction according to claim 1, characterized in that: A fuse is arranged inside the temperature sensor element (22), and the fuse is connected to the driving actuator (12).

3. The air valve with temperature control chain reaction according to claim 1, characterized in that: The temperature control device (2) further comprises a junction box (21) which is detachably fixed to the outer wall of the valve body (1), and the end of the temperature sensor element (22) away from the valve body (1) is connected to the inside of the junction box (21).

4. The air valve with temperature control chain reaction according to claim 3, characterized in that: A micro switch (23) and a spring return member (24) are installed inside the junction box (21). The spring return member (24) comprises a return rod (241) rotatably arranged on the inner wall of the junction box (21) and a return spring (243) connected to the return rod (241). The end of the return rod (241) away from its rotation point is connected to the end of the temperature sensor element (22). The return spring (243) is connected to the rotation end of the return rod (241), one end of which is fixed to the inner wall of the junction box (21) and the other end is fixed to the return rod (241). The micro switch (23) is connected to a power supply line and a return line, and a switch contact (231) is arranged on the micro switch (23). When the return rod (241) contacts the switch contact (231), the drive actuator (12) is powered off. Alternatively, when the return rod (241) is disconnected from the switch contact (231), the drive actuator (12) is powered on.

5. The air valve with temperature control chain reaction according to claim 1, characterized in that: A mounting hole (3) is provided on the valve body (1) at a position where the temperature sensor element (22) is inserted, and the temperature detecting end of the temperature sensor element (22) is inserted at the mounting hole (3).

6. The air valve with temperature control chain reaction according to claim 3, characterized in that: An inspection opening (25) is provided on the side of the junction box (21) away from the valve body (1), and an inspection cover plate (26) is installed at the inspection opening (25).

7. The air valve with temperature control chain reaction according to claim 3, characterized in that: A plurality of magnetic elements (27) are provided on the side of the junction box (21) facing the valve body (1), and the magnetic elements (27) can be adsorbed on the outer wall of the valve body (1).

8. The air valve with temperature control chain reaction according to claim 3, characterized in that: A supporting box (29) is fixed on the outer wall of the valve body (1), and the junction box (21) is plugged into the supporting box (29).

9. The air valve with temperature control chain reaction according to claim 3, characterized in that: A heat insulation pad (28) is provided on the contact surface between the junction box (21) and the valve body (1).

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