CN213176827U - Pressure-relief closed air valve and central air-conditioning ventilation system - Google Patents

Abstract

The utility model relates to a central air conditioning ventilation system pipeline technical field discloses a but airtight blast gate of pressure release and central air conditioning ventilation system. Wherein, the pressure-relief air-tight valve comprises a valve body with an air duct inside; the blades are rotatably arranged in the valve body and used for opening or closing the air channel of the valve body; the shifting sheet is arranged on the valve body and is fixed with the blade; signal feedback device, including first contact switch and second contact switch, first contact switch with second contact switch all set up in on the valve body, work as the blade rotates to closing during the wind channel of valve body, the plectrum butt first contact switch, first contact switch outputs first feedback signal, works as the blade rotates to opening during the wind channel of valve body, the plectrum butt second contact switch, second contact switch outputs second feedback signal, is convenient for feed back the state that the blade opened or closed the wind channel of valve body.

Description

Pressure-relief closed air valve and central air-conditioning ventilation system

Technical Field

The utility model relates to a central air conditioning ventilation system pipeline technical field especially relates to a but airtight blast gate of pressure release and central air conditioning ventilation system.

Background

The air volume regulating valve is an indispensable central air-conditioning end fitting in ventilation, air-conditioning and air purification projects of industrial factory buildings and civil buildings. The air volume in the ventilation pipeline is generally adjusted in the pipeline of an air conditioner or a ventilation system, and the air volume can also be used for the mixed adjustment of fresh air and return air.

Which typically includes a valve body, vanes, and an adjustment device. The adjusting device is arranged outside the valve body and can be used for adjusting the rotating angle of the blade, the blade is arranged in the valve body and can rotate relative to the valve body, and the adjusting device changes the air volume passing through the air duct of the valve body by adjusting the rotating angle of the blade so as to realize the function of adjusting the air volume of the pressure-relief air-tight air valve.

In the process of implementing the present invention, the inventor finds that: the existing air volume regulating valve only has the function of regulating air volume, but does not have the function of feeding back the state that the blade opens or closes the air duct of the valve body, and is very inconvenient in the use scenes of certain pressure-relief and air-tight valves.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a main technical problem who solves provides a but the airtight blast gate of pressure release and central air conditioning ventilation system, the state that the wind channel of the feedback leaf valve body of being convenient for was opened or was closed.

In order to solve the above technical problem, an embodiment of the present invention adopts a technical solution that: there is provided a pressure-relief, sealed air-tight valve comprising: the valve body is internally provided with an air duct; the blades are rotatably arranged in the valve body and used for opening or closing the air channel of the valve body; the shifting piece is fixed with the blade; the signal feedback device comprises a first contact switch and a second contact switch, wherein the first contact switch and the second contact switch are arranged on the valve body, when the blade rotates to be closed in the air channel of the valve body, the shifting piece is abutted to the first contact switch, the first contact switch outputs a first feedback signal, when the blade rotates to be opened in the air channel of the valve body, the shifting piece is abutted to the second contact switch, and the second contact switch outputs a second feedback signal.

In some embodiments, when the blade rotates to close the air duct of the valve body, the blade drives the shifting piece to rotate to a first abutting position; when the blade rotates to open the air duct of the valve body, the blade drives the shifting piece to rotate to the second abutting position.

In some embodiments, the pressure relief tight shut off damper further comprises a shaft; one end of the rotating shaft holds the blade; the valve body is provided with a shaft hole, the other end of the rotating shaft is inserted in the shaft hole, the other end of the rotating shaft extends out of the shaft hole and is fixed with the shifting piece, and the rotating shaft can rotate relative to the shaft hole.

In some embodiments, the pressure letdown valve further comprises an actuator; the actuating mechanism is arranged outside the valve body; the actuating mechanism is provided with an output shaft, and the output shaft is connected to the rotating shaft.

In some embodiments, the pressure letdown valve further comprises a drive shaft; the transmission shaft is detachably connected to the rotating shaft and the output shaft.

In some embodiments, one end of the transmission shaft is provided with a first mounting hole, and the other end of the transmission shaft is provided with a second mounting hole; the rotating shaft is provided with a first mounting part which is inserted into the first mounting hole; the output shaft is provided with a second mounting part which is inserted in the second mounting hole.

In some embodiments, the signal feedback device further comprises a housing; the shell is arranged outside the valve body; the plectrum, the first contact switch and the second contact switch are all arranged in the shell.

In some embodiments, the valve body is provided with an opening; the opening is communicated with the air duct of the valve body and is positioned between the air outlet of the valve body and the blade; the pressure-releasing airtight air valve comprises an air outlet assembly, the air outlet assembly is arranged at the opening, when the blade rotates to close the air channel of the valve body, the air outlet assembly opens the opening, and when the blade rotates to open the air channel of the valve body, the air outlet assembly closes the opening.

In some embodiments, the opening is disposed at a top of the valve body; the air outlet assembly comprises a ventilation pipe and a flashboard; the vent pipe is arranged in the opening in a penetrating way; the air intake of ventilation pipe set up in the wind channel, the flashboard rotate connect in the air intake of ventilation pipe, work as the blade is rotatory to closing the wind channel, the flashboard is opened the air intake of ventilation pipe, work as the blade is rotatory to opening the wind channel, the flashboard is closed the air intake of ventilation pipe.

In order to solve the above technical problem, the embodiment of the present invention adopts another technical solution: the central air-conditioning ventilation system comprises the pressure-relief airtight air valve.

The embodiment of the utility model provides a beneficial effect is: unlike the prior art, the paddle is fixed to the blade and rotates coaxially with the blade. When the blade rotates to close the air duct of the valve body, the shifting piece is abutted to the first contact switch, and the first contact switch generates and outputs a first feedback signal. When the blade rotates to open the air duct of the valve body, the shifting piece is abutted to the second contact switch, and the second contact switch generates and outputs a second feedback signal. The signal feedback device is arranged on the valve body, so that the state of the blade opening or closing the air duct of the valve body can be fed back conveniently.

Drawings

One or more embodiments are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which elements having the same reference numeral designations represent like elements and in which the figures are not to scale unless specifically stated.

Fig. 1 is a schematic view of an air inlet of an air outlet assembly closing vent pipe when a pressure-relief airtight air valve provided by the present invention is in a state of opening a blade;

fig. 2 is a schematic view of an air inlet of an air outlet assembly opening ventilation pipe when a pressure-relief airtight air valve provided by the present invention is in a state of closing a blade;

fig. 3 is an exploded view of a structure of a pressure-releasing airtight air valve provided by the present invention;

fig. 4 is a structural diagram of the valve body of the pressure-releasing airtight air valve provided by the present invention without installing blades, an air outlet assembly and an actuating mechanism;

fig. 5 is a structural diagram of the valve body of the pressure-releasing airtight air valve provided by the present invention without the air outlet assembly and the actuator;

fig. 6 is a detailed structural diagram of a first rotating shaft of a pressure-relief air-tight valve provided by the present invention;

fig. 7 is a specific structure diagram of an air outlet assembly of a pressure-releasing airtight air valve provided by the present invention;

fig. 8 is an exploded view of the air outlet assembly of the pressure-releasing airtight air valve provided by the present invention;

fig. 9 is a specific structural diagram of a pressure-releasing airtight air valve provided by the present invention, in which a signal feedback device is disposed at a first rotating shaft;

fig. 10 is an exploded view of a signal feedback device of a pressure-releasing airtight damper according to the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and the like as used herein are for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, 2 and 3, an embodiment of the present invention provides a pressure-releasing and sealing air-tight valve, which can be applied to an exhaust system of a pharmaceutical facility, a food processing field, a gene and biotechnology laboratory, and an industrial process in a hospital, or an air-conditioning and ventilation system of a chemical processing facility, an animal disease laboratory, a radioisotope processing facility, a nuclear power plant, a strategic nuclear facility, an energy facility, and a military facility. Of course, the pressure-releasing airtight air valve of the embodiment of the present invention is not limited to the above-mentioned usage scenario, and can be installed in other air supply systems.

Referring to fig. 1 or fig. 2 again, the pressure-relief airtight valve includes a valve body 100, a blade 200 and an air outlet assembly 300. The vane 200 is rotatably provided in the valve body 100 for opening or closing the valve body 100. The air inlet 110 of the valve body 100 is used for connecting air outlet equipment, and the air outlet 120 of the valve body 100 is used for connecting air supply equipment. Whether the air outlet equipment supplies air to the air supply equipment or not is controlled through the blades 200. The air outlet assembly 300 is disposed on the valve body 100 and located between the blade 200 and the air outlet 120 of the valve body 100. When the blade 200 rotates to close the valve body 100, the airflow channels between the blade 200 and the air outlet 120 of the valve body 100 and between the air supply device and the air outlet 120 of the valve body 100 can be communicated with the outside through the air outlet assembly 300. The air outlet assembly 300 is opened, so that the situation that harmful bacteria are bred due to the fact that an air flow channel between the blade 200 and the air outlet 120 of the valve body 100 and between the air supply equipment and the air outlet 120 of the valve body 100 is closed after the valve body 100 is closed is effectively avoided. When the blade 200 rotates to open the valve body 100, the air outlet assembly 300 is closed, and it is ensured that the air output by the air outlet assembly 300 enters the air supply device after the valve body is opened, and the air does not escape from the air outlet assembly 300.

As shown in fig. 4 and 5, the valve body 100 is a cylinder, and an air duct (not shown) is formed in the valve body 100, and the air duct of the valve body 100 penetrates through two ends of the valve body 100, so as to form an air inlet 110 and an air outlet 120 of the valve body 100. The vane 200 is disposed in the air duct of the valve body 100, and divides the air duct into a first air duct and a second air duct, wherein the first air duct is an area between the air inlet 120 of the valve body 100 and the vane 200, and the second air duct is an area between the vane 200 and the air outlet 130 of the valve body 100. The air inlet 110 of the pressure-releasing and air-sealing air valve is used for connecting with the air outlet equipment, for example, a flange is arranged at one end of the air inlet 110 of the pressure-releasing and air-sealing air valve, and the flange is connected with a main ventilation pipeline of the central air conditioner. The air outlet 120 of the pressure-relief and air-tight air valve is used for connecting with an air supply device, such as: one end of the air outlet 120 of the pressure relief closed air valve is provided with a bulge, and the bulge is connected with a branch ventilating duct of the central air conditioner.

The valve body 100 is provided with an opening 130 communicating with the air duct. Specifically, the opening 130 is located at the top of the second air duct and penetrates through the valve body 100, so that the second air duct is communicated with the external environment. The opening 130 is used for installing the air outlet assembly 300.

It can be understood that: the shape of the valve body 100 may be other shapes, for example, the shape of the valve body 100 may be a square or a rectangular parallelepiped, as long as the shape of the valve body 100 is adapted to the shape of the blade 200, so that the blade 200 performs the function of separating the air duct of the valve body 100.

Referring to fig. 4 and 5, for the vane 200, the vane 200 is rotatably installed in the valve body 100, and the vane 200 is used for closing or opening the air passage of the valve body 100, thereby closing or opening the valve body 100.

In this embodiment, the valve body 100 is opened with a first shaft hole 101 and a second shaft hole 102, and the first shaft hole 101 and the second shaft hole 102 are oppositely disposed. The pressure-releasing airtight valve further includes a first rotating shaft 400 and a second rotating shaft 500. One end of the first shaft 400 is fixed to one side of the vane 200, the other end of the first shaft 400 is inserted into the first shaft hole 101, and the first shaft 400 is rotatable with respect to the first shaft hole 101. One end of the second rotating shaft 500 is fixed to the other side of the vane 200, the other end of the second rotating shaft 500 is inserted into the second shaft hole 102, and the second rotating shaft 500 can rotate relative to the second shaft hole 102, so that the vane 200 is rotatably mounted in the valve body 100.

Referring to fig. 6, in detail, the first rotating shaft 400 includes a first clamping portion (not shown) and a first spindle (not shown) connected to each other, the first clamping portion is disposed at an end of the first rotating shaft 400 close to the air duct of the valve body 100, the first spindle is disposed at an end of the first rotating shaft 400 far away from the air duct of the valve body 100, and the first spindle is inserted into the first shaft hole 101 and can rotate relative to the axis of the first shaft hole 101. The first clamping portion includes a first clamping portion main body (not shown in the figure) and a first clamping member (not shown in the figure), the first clamping portion main body is provided with a notch (not shown in the figure) penetrating through the first clamping portion main body in the axial direction, the width of the notch is equal to the thickness of the blade 200, so that one side of the blade 200 is embedded into the notch (not shown in the figure), and the first clamping portion main body is further provided with a circular hole (not shown in the figure) penetrating through the first clamping portion main body in the radial direction. The blade 200 is embedded into the notch, and the first clamping piece penetrates through the round hole to fix the blade 200 and the first main shaft. The matching manner of the second shaft hole 102 and the second shaft 500 is the same, and is not described in detail in this application.

In some embodiments, the pressure-relief and air-tight damper further includes a baffle (not shown), which is disposed on the valve body 100 and is adapted to the vane 200, and when the vane 200 rotates to close the air duct of the valve body 100, the vane 200 is attached to the baffle, so that the valve body 100 has better sealing performance when closed.

Specifically, the number of the baffles is two, and the baffles are respectively a first baffle 701 and a second baffle 702, the first baffle 701 is located at one end of the valve body 100 close to the air outlet 130 of the valve body 100, and the second baffle 702 is located at one end of the valve body 100 close to the air inlet 120 of the valve body 100. When the vane 200 rotates to close the air duct of the valve body 100, the upper half of the vane 200 abuts against the first baffle 701 and at least partially abuts against one side of the first baffle 701, and the lower half of the vane 200 abuts against the second baffle 702 and at least partially abuts against one side of the second baffle 702, so that the vane 200 has better performance in sealing the air duct of the valve body 100.

Optionally, the sides of the first baffle 701 and the second baffle 702, which are attached to the blade 200, are provided with sealing members (not shown) matching the shapes of the first baffle and the second baffle. For example, the sealing element (not shown) may be a high temperature resistant silicone sealing strip or a high temperature resistant silicone gasket to satisfy the valve leakage rate: less than or equal to 1.3 multiplied by 10 < -7 > Pa.L/S; the applicable temperature is as follows: the use condition is-30 to +300 ℃.

Referring to fig. 7 and 8, for the air outlet assembly 300, the air outlet assembly 300 includes a vent pipe 310, a shutter 320, a bracket 330 and a plug 340. The vent pipe 310 is disposed through the opening of the valve body 100 for communicating the air duct of the valve body 100 with the external environment, and the shutter 320 is rotatably connected to the air inlet of the vent pipe 310 for closing or opening the air inlet of the vent pipe 310. It should be noted that the shutter 320 may droop due to the influence of gravity or thrust when not being subjected to an external force or a force applied to the side of the shutter 320 facing the outlet of the valve body 100, and the inlet of the vent pipe 310 is in an open state. When the shutter 320 is subjected to a force applied to the side of the shutter 320 facing the inlet of the valve body 100, the shutter 320 rotates to close the inlet of the vent pipe 310, and the inlet of the vent pipe 310 is in a closed state.

Specifically, the shape of the nozzle of the vent tube 310 matches the shape of the opening 120 of the valve body 100, so that the vent tube 310 can be inserted into the opening 120 of the valve body 100, the vent tube 310 is inserted into the opening 120 of the valve body 100, and the outer wall of the vent tube 310 is sewn with the opening 120 by welding, so that the vent tube 310 is fixed to the valve body 100. The shutter 320 is located at the air inlet of the ventilation pipe 310, and one side of the shutter, which is close to the air inlet of the valve body 100, is rotatably connected with the ventilation pipe 310.

In some embodiments, the bracket 330 is disposed at an end of the vent tube 310 near the air inlet of the vent tube 310; the bracket 330 is provided with a shaft hole 331, the shutter 320 is provided with a mounting hole 321, and the plug 340 is inserted into the shaft hole 331 and the mounting hole 321, respectively, so that the shutter 320 rotates relative to the shaft of the plug 340.

Specifically, the bracket 330 includes a bracket main body (not shown), a first bending portion (not shown) and a second bending portion (not shown), the bracket 330 is embedded in the outer wall of the ventilation pipe 310, the two ends of the bracket main body are respectively provided with the first bending portion and the second bending portion, the first bending portion is formed by bending one end of the bracket main body towards the direction of the air inlet of the ventilation pipe 310, the second bending portion is formed in the same manner as the first bending portion, the first bending portion is provided with a first bracket axle hole (not shown), the second bending portion is provided with a second bracket axle hole (not shown), the first bracket axle hole and the second bracket axle hole are arranged oppositely, one side of the flashboard 320 close to the air inlet of the valve body 100 is provided with an extension portion (not shown), the two ends of the extension portion are respectively bent towards the air outlet direction of the valve body 100 to form a first bending portion (not shown) and a second bending, the first bending portion is provided with a first mounting hole (not shown in the figure), the second bending portion is provided with a second mounting hole (not shown in the figure), and the plug pin 340 is inserted into the second bending portion along the first bending portion and respectively passes through the first support shaft hole, the first mounting hole, the second support shaft hole and the second mounting hole.

In some embodiments, the outlet assembly 300 further includes a sealing member 350, and the sealing member 350 is disposed on a side of the shutter 320 facing the inlet of the vent pipe 310. Specifically, the damper 320 has a top surface facing the inlet direction of the air inlet duct, and the sealing member 350 is disposed on the top surface of the damper 320.

It can be understood that: the sealing element 350 may be a high temperature resistant silica gel sealing pad or a high temperature resistant silica gel sealing strip, and the sealing element 350 may be fixed to the gate plate 320 by a gluing or pressing connection method.

In some embodiments, the air outlet assembly 300 further comprises a bull horn elbow 360; one end of the ox horn elbow 360 is connected to the air outlet of the ventilation pipe 310. For example, the ox horn bend 360 is sleeved at the end of the vent pipe 310 where the air outlet is located, thereby preventing the air discharged from the vent pipe from flowing back to the air flow.

In some embodiments, the end surface of the horn bend 360 distal from the other end of the vent tube 310 is beveled. Specifically, an included angle formed by the inclined surface and the axial direction of the horizontal end of the ox horn elbow 360 is an acute angle, for example, the included angle is 45 degrees or 60 degrees, which is beneficial to discharging the air flow from the air outlet of the ox horn elbow.

Referring to fig. 9 and 10, in some embodiments, the pressure-relief airtight valve further includes a pick-up 800 and a signal feedback device 900. The signal feedback device 900 is arranged on the valve body 100, the poking piece 800 is fixed with the blade 200, when the blade 200 rotates, the poking piece 800 rotates along with the blade 200, the signal feedback device 900 is used for detecting the rotation of the poking piece 800 to determine whether the blade 200 closes or opens the air channel, when the blade is detected to close the air channel, a first feedback signal is output, and when the blade 200 is detected to open the air channel, a second feedback signal is output.

Referring to fig. 3, for the above-mentioned shifting piece 800, a protruding portion (not shown) is further extended from the other end of the first shaft 400, the protruding portion penetrates through the first shaft hole 400 and extends to the outside of the valve body 100, the shifting piece 800 is disposed on the protruding portion of the first shaft 400, so that the shifting piece 800 and the blade 200 are fixed, and the blade 200 rotates to drive the coaxial shifting piece 800 to rotate.

For the signal feedback device 900, the signal feedback device 900 includes a first contact switch 910 and a second contact switch 920, the first contact switch 910 and the second contact switch 920 are both disposed outside the valve body 100 and located on a plane formed by the rotation of the pick-up 800, and the positions of the first contact switch 910 and the second contact switch 920 are different. In some embodiments, the first contact switch 910 and the second contact switch 920 may employ the same type of passive sensor, for example, the first contact switch 910 and the second contact switch 920 are both pressure sensors or piezoelectric sensors, or may employ different types of passive sensors, for example, the first contact switch 910 is a pressure sensor and the second contact switch 920 is a piezoelectric sensor.

The coaxial shifting piece 800 is driven to rotate by the rotation of the blade 200, when the blade 200 rotates to close the air channel of the valve body 100, the shifting piece 800 is abutted to the first contact switch 910, the first contact switch 920 generates and outputs a first feedback signal, when the blade 200 rotates to open the air channel of the valve body 100, the shifting piece 800 is abutted to the second contact switch 920, and the second contact switch 920 generates and outputs a second feedback signal. Rather, the current state of the blade can be determined by the first feedback signal and the second feedback signal, i.e.: the vanes are in a state of closing the air passage or in a state of opening the air passage.

It is worth mentioning that: when the blade 200 rotates to close the air duct of the valve body 100, that is, when the plane where the blade 200 is located is parallel to the radial direction of the valve body 100, that is, the blade 200 uniformly divides the air duct of the valve body 100 into a first upper air duct located at the top of the valve body 100 and a first lower air duct located at the bottom of the valve body, the dial 800 abuts against the first contact switch 910, and the hovering position of the dial 800 is the first abutting position. When the blade 200 rotates to open the air duct of the valve body 100, that is, when the plane where the blade 200 is located is parallel to the axial direction of the valve body 100, that is, the blade 200 uniformly divides the air duct of the valve body 100 into a first air duct located at the air inlet and a second air duct located at the air outlet, the pick 800 abuts against the first contact switch 910, and the hovering position of the pick is the second abutting position 920.

It can be understood that: the first contact switch 910 and the second contact switch 920 may also be connected with a signal receiving apparatus through a wire or a wireless signal. The signal receiving equipment has the function of receiving a first feedback signal and a second feedback signal.

Referring to fig. 9 and 10, in some embodiments, the signal feedback device 900 further includes a housing 930, the housing 930 is disposed outside the valve body 100, and the housing 930 covers the other end of the first rotating shaft 400, the first contact switch 910, the second contact switch 920, and the dial 800.

Specifically, the housing 930 includes a main plate (not shown), a first side plate (not shown), a second side plate (not shown), and a fixing plate (not shown). The one end of first curb plate and second curb plate is fixed in the surface of valve body, and the mainboard is fixed in the other end of first curb plate and second curb plate, and the both ends of fixed plate are fixed in the internal surface of first curb plate and second curb plate respectively, and the protruding portion of first pivot passes from the fixed plate to insert in the space that mainboard, first curb plate, second curb plate and fixed plate enclosed, first contact switch and second contact switch all are located the fixed plate.

Optionally, the first side plate is provided with two slots (not shown in the figure), the insertion ends of the first slot and the second slot are connected to the input end of the signal receiving device, the connection end of the first slot is connected to the positive electrode and the negative electrode of the first contact switch through a wire, and the connection end of the second slot is connected to the positive electrode and the negative electrode of the second contact switch through a wire.

Referring back to fig. 9, in some embodiments, the pressure-relief airtight valve further includes an actuator 600 and a transmission shaft 1000, the actuator 600 has an output shaft (not shown), the output shaft of the actuator is detachably connected to the transmission shaft 1000, and the transmission shaft 1000 is detachably connected to the protruding portion of the first rotation shaft, so as to drive the blades 200 and the shifting piece 800 to rotate.

In some embodiments, a second mounting portion (not shown in the drawings) is convexly disposed on an end surface of an output shaft of the actuator 600, the end surface of the transmission shaft 1000, which is close to the output shaft, is recessed to form a second mounting hole (not shown in the drawings), the shape of the second mounting portion is matched with the shape of the second mounting hole, and the second mounting portion can be embedded into the second mounting hole, so that the actuator 600 drives the transmission shaft 1000 to rotate. The end face of the transmission shaft 1000 near the protruding portion is recessed to form a first mounting hole (not shown in the figure), the end face of the protruding portion near the transmission shaft is provided with a first mounting portion (not shown in the figure), the shape of the first mounting portion is matched with that of the first mounting hole, and the first mounting portion can be embedded into the first mounting hole, so that the transmission shaft 1000 drives the first rotating shaft 400 to rotate, and further drives the blades 200 and the shifting piece 800 to rotate.

It can be understood that: the way in which the transmission shaft 800 is detachably coupled to the protrusion of the first rotation shaft 400 is not limited to the above, but may be other ways, such as: and screwing and fixing.

In the present embodiment, the paddle 800 is fixed to the blade 200 and rotates coaxially with the blade 200. When the vane 200 rotates to close the air channel of the valve body 100, the pick-up 800 abuts against the first contact switch 910, and the first contact switch 910 generates and outputs a first feedback signal. When the vane 200 rotates to open the air duct of the valve body 100, the pick-up 800 abuts against the second contact switch 920, and the second contact switch 920 generates and outputs a second feedback signal. The signal feedback device 900 is arranged on the valve body 100, so that the feedback of the state that the blade 200 opens or closes the air channel of the valve body is facilitated.

The utility model also provides a pair of central air conditioning ventilation system, include: for the specific structure and function of the pressure-releasing and sealing air valve, reference may be made to the above embodiments, and details are not repeated here.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. A pressure relief, seal-closing damper, comprising:

the valve body is internally provided with an air duct;

the blades are rotatably arranged in the valve body and used for opening or closing the air channel of the valve body;

the shifting piece is arranged on the valve body and is fixed with the blade;

the signal feedback device comprises a first contact switch and a second contact switch, wherein the first contact switch and the second contact switch are arranged on the valve body, when the blade rotates to be closed in the air channel of the valve body, the shifting piece is abutted to the first contact switch, the first contact switch outputs a first feedback signal, when the blade rotates to be opened in the air channel of the valve body, the shifting piece is abutted to the second contact switch, and the second contact switch outputs a second feedback signal.

2. The pressure-relief air-tight valve according to claim 1, wherein when the blade rotates to close the air duct of the valve body, the blade drives the shifting piece to rotate to the first abutting position;

when the blade rotates to open the air duct of the valve body, the blade drives the shifting piece to rotate to the second abutting position.

3. The pressure relief valve according to claim 1, further comprising a shaft;

one end of the rotating shaft holds the blade;

the valve body is provided with a shaft hole, the other end of the rotating shaft is inserted in the shaft hole, the other end of the rotating shaft extends out of the shaft hole and is fixed with the shifting piece, and the rotating shaft can rotate relative to the shaft hole.

4. The pressure relief valve according to claim 3, further comprising an actuator;

the actuating mechanism is arranged outside the valve body;

the actuating mechanism is provided with an output shaft, and the output shaft is connected to the rotating shaft.

5. The pressure relief valve according to claim 4, further comprising a drive shaft;

the transmission shaft is detachably connected to the rotating shaft and the output shaft.

6. The pressure relief and sealing damper as claimed in claim 5, wherein one end of said transmission shaft is provided with a first mounting hole and the other end of said transmission shaft is provided with a second mounting hole;

the rotating shaft is provided with a first mounting part which is inserted into the first mounting hole;

the output shaft is provided with a second mounting part which is inserted in the second mounting hole.

7. The pressure relief valve according to claim 1, wherein said signal feedback device further comprises a housing;

the shell is arranged outside the valve body;

the plectrum, the first contact switch and the second contact switch are all arranged in the shell.

8. The pressure relief valve according to claim 1, wherein said valve body is provided with an opening;

the opening is communicated with the air duct of the valve body and is positioned between the air outlet of the valve body and the blade;

the pressure-releasing airtight air valve comprises an air outlet assembly, the air outlet assembly is arranged at the opening, when the blade rotates to close the air channel of the valve body, the air outlet assembly opens the opening, and when the blade rotates to open the air channel of the valve body, the air outlet assembly closes the opening.

9. The pressure relief valve according to claim 8, wherein said opening is provided at the top of said valve body; the air outlet assembly comprises a ventilation pipe and a flashboard;

the vent pipe is arranged in the opening in a penetrating way;

the air intake of ventilation pipe set up in the wind channel, the flashboard rotate connect in the air intake of ventilation pipe, work as the blade is rotatory to closing the wind channel, the flashboard is opened the air intake of ventilation pipe, work as the blade is rotatory to opening the wind channel, the flashboard is closed the air intake of ventilation pipe.

10. A central air conditioning ventilation system, characterized by comprising a pressure-relief and air-tight damper as claimed in any one of claims 1 to 9.

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