Excess pressure balance fire-fighting ventilation pipeline valve

Abstract

An excess pressure balance fire-fighting ventilation pipeline valve comprises a valve body, and the valve body is arranged in a fire-fighting ventilation pipeline. The valve plate is rotatably installed in the valve body and used for controlling opening and closing of the channel. The driving device is connected with the valve plate and is used for driving the valve plate to rotate; the excess pressure sensing and adjusting device comprises excess pressure sensors, a controller and a hydraulic adjusting mechanism, the excess pressure sensors are arranged at the air inlet and the air outlet of the valve body and used for detecting the pressure difference between the air inlet and the air outlet and transmitting a pressure difference signal to the controller, and the controller is used for controlling the hydraulic adjusting mechanism. The controller controls the hydraulic adjusting mechanism to work according to the received pressure difference signal, the hydraulic adjusting mechanism is connected with the driving device, the opening degree of the valve plate is controlled by adjusting the driving force of the driving device, and therefore balance adjustment of the residual pressure is achieved. The pressure difference in the ventilation pipeline is monitored in real time through the residual pressure sensing and adjusting device, and the opening degree of the valve plate is automatically adjusted, so that residual pressure balance is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fire ventilation equipment technical field especially relates to a valve of excess pressure balance fire ventilation pipeline. BACKGROUND

[0002] In the fire ventilation system, the ventilation pipeline is used for discharging smoke and conveying fresh air in time when the fire occurs, so as to guarantee the safety and passability of the personnel evacuation passage. However, in practical application, due to the complex building structure, the various layout of ventilation pipeline and the uncertainty of fire scene, the problem of unbalanced pressure in the ventilation pipeline of different regions often occurs. This excess pressure imbalance can cause abnormal smoke diffusion, such as backflow to the evacuation passage, which seriously affects the safety of personnel evacuation; at the same time, it also affects the smoke exhaust efficiency of the ventilation system on the fire area, which is not conducive to the fire fighting and control.

[0003] The existing ventilation pipeline valve mostly focuses on the simple opening and closing function control, and the regulation ability of excess pressure balance is limited, which is difficult to adapt to the complex fire ventilation demand. Therefore, there is an urgent need for a valve device which can effectively balance the excess pressure of the ventilation pipeline and has reliable performance and convenient operation. SUMMARY

[0004] In order to solve the problems raised in the above background art, the utility model provides a valve of excess pressure balance fire ventilation pipeline, which monitors the pressure difference in the ventilation pipeline in real time through the excess pressure induction adjusting device, and automatically adjusts the opening degree of the valve plate to realize the balance of excess pressure.

[0005] In order to solve the above technical problems, the technical scheme provided by the utility model is as follows:

[0006] A valve of excess pressure balance fire ventilation pipeline, comprising a valve body, a valve plate, a driving device and an excess pressure induction adjusting device, the valve body is arranged in the fire ventilation pipeline, and a channel for ventilation is arranged in the valve body; the valve plate is rotatably installed in the valve body, and the shape of the valve plate is matched with the channel of the valve body, which is used for controlling the opening and closing degree of the channel; the driving device is connected with the valve plate, which is used for driving the valve plate to rotate; the excess pressure induction adjusting device comprises an excess pressure sensor, a controller and a hydraulic adjusting mechanism, which is used for adjusting the driving force of the driving device to control the opening degree of the valve plate.

[0007] Preferably, the surface of the valve plate is provided with a fireproof coating, which can enhance the fire resistance of the valve plate in the fire environment, prevent the valve plate from rapidly heating and deforming due to high temperature when the fire occurs, and ensure that the valve plate can still work normally in the high temperature environment. A sealing rubber strip is arranged around the edge of the valve plate, which is tightly embedded in the groove of the edge of the valve plate, and tightly contacts with the inner wall of the channel of the valve body, so as to effectively prevent air leakage in the closed state of the valve plate and ensure the sealing performance of the valve.

[0008] Preferably, the driving device specifically comprises a motor, a speed reducer and a transmission rod.

[0009] Preferably, the output shaft of the motor is connected with the input end of the speed reducer through a shaft coupling.

[0010] Preferably, the output end of the speed reducer is keyed connected with the transmission rod, which can accurately convert the high-speed rotation of the motor into a low-speed large torque output suitable for the rotation of the valve plate.

[0011] Preferably, one end of the transmission rod is connected with the speed reducer, and the other end is fixedly connected with the valve plate, thereby ensuring that the power of the motor is stably transmitted to the valve plate, and the valve plate can accurately rotate according to the instructions of the controller, thereby realizing accurate control of the opening and closing degree of the ventilation passage, and further affecting the air pressure and air volume in the ventilation duct and participating in the residual pressure balance adjustment process.

[0012] Preferably, the residual pressure sensor is arranged at the air inlet and air outlet of the valve body, for detecting the pressure difference between the air inlet and the air outlet, and transmitting the pressure difference signal to the controller.

[0013] Preferably, the controller can quickly and accurately analyze and calculate according to the received pressure difference signal through the residual pressure balance control program pre-written in the controller, and generate corresponding control instructions to control the hydraulic adjusting mechanism to work, thereby realizing real-time adjustment of the opening degree of the valve plate and dynamic balance adjustment of the residual pressure of the ventilation duct.

[0014] Preferably, the hydraulic adjusting mechanism is connected with the driving device, and the opening degree of the valve plate is controlled by adjusting the driving force of the driving device, thereby realizing the residual pressure balance adjustment.

[0015] Preferably, the hydraulic adjusting mechanism comprises a hydraulic pump, a hydraulic cylinder and a hydraulic pipeline, the hydraulic pump is electrically connected with the controller, can flexibly adjust the flow and pressure of the output hydraulic oil according to the control instructions issued by the controller, and the hydraulic pump is connected with the hydraulic cylinder through a high-strength hydraulic pipeline; the piston rod of the hydraulic cylinder is connected with the control switch in the power supply circuit of the motor in a mechanical linkage connection mode, when the controller controls the hydraulic pump to inject or extract hydraulic oil into or out of the hydraulic cylinder according to the residual pressure signal, the piston rod of the hydraulic cylinder will correspondingly extend or retract, and then accurately control the on-off and current size of the power supply circuit of the motor through the mechanical linkage device, thereby realizing stepless adjustment of the motor speed, and finally achieving the purpose of accurately controlling the opening degree of the valve plate and effectively balancing the residual pressure in the ventilation duct.

[0016] Preferably, the two ends of the hydraulic pipeline are respectively connected with the outlet of the hydraulic pump and the inlet of the hydraulic cylinder through pipe joints and sealed by sealing rings, thereby ensuring the sealing and reliability of the high-pressure hydraulic oil during transmission, and preventing system failure caused by hydraulic oil leakage.

[0017] Preferably, the side of the valve body is provided with an access hole, and a detachable cover plate is arranged at the access hole, the cover plate and the valve body are connected by bolts, and a sealing gasket is arranged at the connection position to ensure the sealing performance when the access hole is closed. When the valve needs to be maintained, repaired or internal components replaced, the cover plate can be conveniently removed by the staff, and each component inside the valve can be comprehensively inspected and repaired, thereby greatly improving the maintainability and service life of the valve.

[0018] Compared with the prior art, the utility model has the advantages that:

[0019] The utility model discloses a pressure difference between the air inlet and the air outlet of the ventilation pipeline is monitored in real time by the excess pressure sensor, and the valve plate opening is accurately adjusted according to the pressure difference signal by the controller and the hydraulic adjusting mechanism, so that the dynamic balance adjustment of the excess pressure of the ventilation pipeline is realized. The intelligent excess pressure balance control mechanism effectively avoids the abnormal backflow of smoke in the evacuation channel, significantly improves the smoke exhaust efficiency of the fire ventilation system, and creates very favorable conditions for personnel safety evacuation and fire rescue work. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the utility model cross section structure schematic diagram;

[0021] Figure 2 It is the utility model main view structure schematic diagram.

[0022] 1, valve body;2, valve plate;3, drive device;4, excess pressure induction adjusting device;11, access hole;12, equipment cabin;31, motor;32, coupling;33, speed reducer;34, transmission rod;41, excess pressure sensor;42, controller;43, hydraulic adjusting mechanism;421, control box;431, hydraulic pump;432, hydraulic cylinder;433, hydraulic pipeline. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the utility model.

[0024] Refer to Figure 1 And Figure 2The utility model discloses a kind of excess pressure balance fire-fighting ventilation pipeline valves of the embodiment of the utility model, which comprises valve body 1, valve body 1 is overall in cuboid shape, its side surface is provided with an overhaul opening 11, detachable cover plate is installed at overhaul opening 11, cover plate is connected with valve body 1 by bolt, these bolts are evenly distributed on the periphery of cover plate.

[0025] Specifically, interfaces connected with the fire-fighting ventilation pipeline are arranged at the top and bottom of the valve body 1, and sealing rings are used for sealing treatment at the connection positions.

[0026] Specifically, the valve plate 2 is shaped to match the ventilation channel inside the valve body 1, and can rotate freely in the channel to control the ventilation volume; the surface of the valve plate 2 is treated with a special fireproof coating to prevent deformation of the valve plate 2 under long-time high-temperature baking; a sealing rubber strip is arranged around the edge of the valve plate 2, the cross section of the rubber strip is in the shape of a dovetail groove, and the rubber strip is tightly fitted in the pre-processed groove at the edge of the valve plate 2; when the valve plate 2 is in the closed state, the sealing rubber strip is in close contact with the inner wall of the channel of the valve body 1, thereby forming reliable sealing.

[0027] Specifically, the rotation of the valve plate 2 is controlled by the driving device 3, which is located in the equipment cabin 12 on one side of the valve body 1 and mainly comprises a motor 31, a speed reducer 33 and a transmission rod 34.

[0028] Specifically, the motor 31 is a fireproof motor with a protection level of IP55; the output shaft of the motor 31 is connected with the input end of the speed reducer 33 through a high-strength elastic column pin coupling 32; the speed reducer 33 is a planetary gear reducer 33, which accurately converts the high-speed rotation of the motor 31 into low-speed large-torque output suitable for the rotation of the valve plate 2; the output end of the speed reducer 33 is connected with the transmission rod 34 through a key; the transmission rod 34 is a solid rod made of stainless steel, one end of which is connected with the speed reducer 33, and the other end is fixedly connected with the valve plate 2 through bolts; a flange plate is arranged at the connection position of the valve plate 2 and the transmission rod 34, and four bolts are evenly distributed on the flange plate.

[0029] Specifically, the excess pressure sensing and adjusting device 4 mainly comprises an excess pressure sensor 41, a controller 42 and a hydraulic adjusting mechanism 43.

[0030] Specifically, the excess pressure sensor 41 has two, which are symmetrically installed at the air inlet and air outlet of the valve body 1; both of the two excess pressure sensors 41 are high-precision differential pressure type pressure sensors, which can monitor the subtle pressure changes in real time and rapidly transmit the pressure difference signals to the controller 42.

[0031] Specifically, the controller 42 adopts an industrial programmable logic controller 42, which is arranged in the control box 421 on one side of the valve body 1 and connected with the residual pressure sensor 41 through an electrical line. When the controller 42 receives the pressure difference signal transmitted by the residual pressure sensor 41, it will perform fast and accurate analysis and calculation according to the residual pressure balance control program written in advance. When the residual pressure sensor 41 detects that the pressure at the air inlet is higher than the pressure at the air outlet and the pressure difference exceeds the set upper limit value, the controller 42 will calculate the amplitude of the opening of the valve plate 2 that needs to be increased according to the built-in control algorithm, and generate a corresponding control instruction to send to the hydraulic adjusting mechanism 43.

[0032] Specifically, the hydraulic adjusting mechanism 43 is arranged in the equipment cabin 12 on one side of the valve body 1, and includes a hydraulic pump 431, a hydraulic cylinder 432 and a hydraulic pipeline 433.

[0033] Specifically, the hydraulic pump 431 adopts a variable plunger pump and is electrically connected with the controller 42, so as to flexibly adjust the flow and pressure of the output hydraulic oil according to the instruction sent by the controller 42.

[0034] Specifically, the hydraulic pump 431 is connected with the hydraulic cylinder 432 through the high-strength hydraulic pipeline 433. The two ends of the hydraulic pipeline 433 are respectively connected with the outlet of the hydraulic pump 431 and the inlet of the hydraulic cylinder 432 through welded pipe joints, and the welded pipe joints adopt O-ring sealing.

[0035] Specifically, the piston rod of the hydraulic cylinder 432 and the control switch in the power supply line of the motor 31 are connected in a mechanical linkage manner. When the controller 42 instructs the hydraulic pump 431 to inject hydraulic oil into the hydraulic cylinder 432, the piston rod of the hydraulic cylinder 432 will extend, the current of the power supply line of the motor 31 is increased through the mechanical linkage device, so as to increase the rotating speed of the motor 31, drive the opening of the valve plate 2 to increase, reduce the pressure at the air inlet, and gradually balance the residual pressure in the ventilation pipeline. Conversely, when the pressure difference is less than the set lower limit value, the controller 42 controls the hydraulic pump 431 to extract the hydraulic oil from the hydraulic cylinder 432, the piston rod is retracted, the current of the power supply line of the motor 31 is reduced, the rotating speed of the motor 31 is reduced, the opening of the valve plate 2 is reduced, the pressure at the air inlet is increased, and the residual pressure is stabilized in a reasonable range.

[0036] The working process of the residual pressure balance fire ventilation pipeline valve in the embodiment of the application is as follows:

[0037] When a fire occurs, the fire ventilation system is started, and airflow begins to flow in the ventilation duct. The excess pressure sensor 41 immediately starts to work, monitors the pressure difference between the air inlet and the air outlet of the valve body 1 in real time, and transmits a signal to the controller 42. According to the received pressure difference signal, the controller 42 quickly judges and generates a control instruction to send to the hydraulic adjusting mechanism 43, and the hydraulic adjusting mechanism 43 in turn adjusts the rotating speed of the motor 31 to drive the valve plate 2 to perform corresponding rotating action, and changes the opening degree of the ventilation passage, so as to balance the excess pressure in the ventilation duct.

[0038] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A pressure balanced fire ventilation duct valve, characterized in that, The utility model relates to a valve for fire ventilation pipe, which comprises a valve body (1), a valve plate (2), a driving device (3) and a residual pressure sensing adjusting device (4), wherein the valve body (1) is arranged in a fire ventilation pipe, and a passage for ventilation is arranged in the valve body (1); the valve plate (2) is rotatably arranged in the valve body (1) and is shaped to be matched with the passage of the valve body (1), and is used for controlling the opening and closing degree of the passage; the driving device (3) is connected with the valve plate (2) and is used for driving the valve plate (2) to rotate; the residual pressure sensing adjusting device (4) comprises a residual pressure sensor (41), a controller (42) and a hydraulic adjusting mechanism (43), and is used for adjusting the driving force of the driving device (3) to control the opening degree of the valve plate (2).

2. A pressure balanced firesmoke vent pipe valve according to claim 1, characterized in that The surface of the valve plate (2) is provided with a fireproof coating, and a sealing rubber strip is arranged around the edge of the valve plate (2), which is tightly embedded in the groove of the edge of the valve plate (2) and tightly contacts with the inner wall of the passage of the valve body (1).

3. A pressure balanced fire-smoke-vent duct valve according to claim 1, wherein, The driving device (3) specifically comprises a motor (31), a speed reducer (33) and a transmission rod (35), the output shaft of the motor (31) is connected with the input end of the speed reducer (33) through a shaft coupling (32), the output end of the speed reducer (33) is keyed connected with the transmission rod (35), and one end of the transmission rod (35) is connected with the speed reducer (33) and the other end is fixedly connected with the valve plate (2).

4. A pressure balanced fire-smoke-vent duct valve according to claim 1, wherein, The residual pressure sensor (41) is arranged at the air inlet and the air outlet of the valve body (1) and is used for detecting the pressure difference between the air inlet and the air outlet and transmitting the pressure difference signal to the controller (42).

5. A pressure balanced fire-smoke-vent duct valve according to claim 1, wherein, The controller (42) performs rapid and accurate analysis and calculation according to the received pressure difference signal through the residual pressure balance control program pre-written in the controller (42) and generates corresponding control instructions to control the hydraulic adjusting mechanism (43) to work.

6. A pressure balanced fire-smoke-vent duct valve according to claim 1, wherein, The hydraulic adjusting mechanism (43) is connected with the driving device (3) and controls the opening degree of the valve plate (2) by adjusting the driving force of the driving device (3).

7. A pressure balanced firesmoke vent pipe valve according to claim 6, characterised in that The hydraulic adjusting mechanism (43) comprises a hydraulic pump (431), a hydraulic cylinder (432) and a hydraulic pipeline (433), the hydraulic pump (431) is electrically connected with the controller (42), the hydraulic pump (431) is connected with the hydraulic cylinder (432) through the high-strength hydraulic pipeline (433), and the piston rod of the hydraulic cylinder (432) is connected with the control switch in the power supply circuit of the motor (31) in a mechanical linkage connection mode; when the controller (42) controls the hydraulic pump (431) to inject or extract hydraulic oil into or out of the hydraulic cylinder (432) according to the residual pressure signal, the piston rod of the hydraulic cylinder (432) will be correspondingly extended or retracted, and then the mechanical linkage device is used to accurately control the on-off and current size of the power supply circuit of the motor (31), so that the stepless adjustment of the rotating speed of the motor (31) is realized.

8. A pressure balanced firesmoke vent pipe valve according to claim 7, characterised in that The hydraulic pipeline (433) is connected with the outlet of the hydraulic pump (431) and the inlet of the hydraulic cylinder (432) through joints at two ends and is sealed by a sealing ring.

9. A pressure balanced fire-smoke-vent duct valve according to claim 1, wherein, The side of the valve body (1) is provided with an inspection opening (11), and the inspection opening (11) is provided with a detachable cover plate, and the cover plate and the valve body (1) are connected in a mode of including bolt connection, and a sealing gasket is arranged at the connection.

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