Variable air volume valve for flow control of fuming cupboard

Abstract

The utility model discloses a flow control variable air volume valve for a fuming cupboard, and relates to the technical field of variable air volume valves. Comprising a shell, an adjusting mechanism is installed in the shell, a fixing mechanism and a communicating mechanism are installed on the outer wall of the shell, the adjusting mechanism comprises an outer ring, the outer ring is fixedly connected to the interior of the shell, and the shell is divided into an air inlet cavity and an air outlet cavity through the outer ring; a first air inlet hole and a first air outlet hole are formed in the two sides of the opposite faces of the outer wall of the outer ring correspondingly, and an inner ring is installed in the outer ring. The rotary knob is rotated to drive the inner ring to rotate, so that the direct interval between the second air inlet hole and the first air inlet hole is adjusted, and air pressure can be adjusted when air flows into the shell from the main communicating hole through the first air inlet hole; the communicating header pipe, the first communicating branch pipe and the second communicating branch pipe which are communicated are installed on the outer wall of the shell, and therefore multi-pipeline connection can be conducted.

Description

TECHNICAL FIELD

[0001] The utility model relates to variable air volume valve technical field, concretely is fume hood flow control variable air volume valve. BACKGROUND

[0002] Variable air volume valve working principle is that airflow enters the air door along the valve bottom direction, passes through the wind measurement section, and the pressure difference in the valve is transmitted to the sensor in the controller through the air pipe, the sensor identifies the pressure difference data and gives the chip in the controller, the chip judges according to the received signal and sends the command to the actuator, so that the rotation of the air valve blade is adjusted, the air volume of the air valve is adjusted, and the constant wind speed of the system is ensured. Variable air volume valve is used for laboratory exhaust, and the valve body is made of PP fireproof and flame retardant material. Based on the Venturi principle, the built-in air volume measurement section is used to measure the exhaust volume, the airflow enters the sensor through the guide pipe, the flow difference is generated, and the data chip controls the actuator in digital form, so that the rotation of the disc is automatically adjusted. It is applied to the exhaust system of chemical laboratory, biosafety laboratory, physical and chemical laboratory, animal laboratory, GMP pharmaceutical factory, isolation ward and the like.

[0003] The flow control type variable air volume valve with the publication number CN215806742U has the following defects in use:

[0004] The above device cannot adjust the internal air pressure of the flow control variable air volume valve during use, so that when the airflow is large, the internal air pressure of the flow control variable air volume valve is easily too large, and the above device only has an air inlet end and an air outlet end. In the process of actual use, the main pipeline usually needs to be connected with multiple branch pipelines, and the single-in single-out structure design is not suitable for multiple pipeline connection, so there is an urgent need for a multiple pipeline flow control variable air volume valve that can adjust the internal air pressure. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing fume hood flow control variable air volume valve to solve the problems in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: fume hood flow control variable air volume valve, including the shell, the inside installation of the shell has adjusting mechanism, the outer wall of the shell is installed with fixed mechanism and intercommunication mechanism, the adjusting mechanism includes outer ring, the inside of the shell is fixedly connected with the outer ring, the shell is divided into air inlet chamber and air outlet chamber through the outer ring, the outer wall opposite surface both sides of the outer ring are opened with first air inlet hole and first air outlet hole, the inside of the outer ring is installed with inner ring, the bottom end of the inner ring is fixedly connected with fixed cover, the inner ring is semicircular hollow shape, the inner ring arc face one side is opened with second air inlet hole, the second air inlet hole is fan shape, the other side both ends of the inner ring are opened with second air outlet hole.

[0007] Preferably, the outer wall of the shell is provided with a total communication hole, and a knob is mounted at the top end of the outer wall of the shell and fixed to the top end of the shell and the inner ring.

[0008] Preferably, the communication mechanism comprises a communication main pipe, the communication main pipe is communicated with the total communication hole, a pressure detection meter is fixedly connected to the side of the outer wall of the shell opposite to the communication main pipe, a first communication branch pipe and a second communication branch pipe are respectively fixedly connected to the other two sides of the outer wall of the shell, and the first communication branch pipe and the second communication branch pipe are communicated with the gas outlet chamber through the outer wall of the shell.

[0009] Preferably, the fixing mechanism comprises a clamping block fixedly connected to the top end of the outer wall of the shell, a threaded column threadedly connected to the top end of the clamping block, a rotating disc fixedly connected to the top end of the outer wall of the threaded column, a bearing mounted at the bottom end of the outer wall of the threaded column, and the inner wall of the bearing is fixed to the bottom end of the outer wall of the threaded column.

[0010] Preferably, the bottom end of the bearing is fixedly connected with a fixed plate, and the bottom end of the fixed plate and the bottom end of the inner wall of the clamping block are both pasted with matching protective gaskets.

[0011] Preferably, the bottom end of the shell is fixedly connected with a bottom cover, and the outer walls of the communication main pipe, the first communication branch pipe and the second communication branch pipe are all provided with a plurality of uniformly distributed threaded grooves.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] The ventilation cabinet flow control variable air volume valve drives the inner ring to rotate through the rotating knob, so as to adjust the interval between the second air inlet hole and the first air inlet hole, so that the gas pressure can be adjusted when the gas flows into the shell through the first air inlet hole from the total communication hole, and the communication main pipe, the first communication branch pipe and the second communication branch pipe are installed on the outer wall of the shell and communicated, so that multi-pipe connection can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structure schematic view of the shaft side of the ventilation cabinet flow control variable air volume valve of the utility model;

[0015] Figure 2 It is a structure schematic view of the fixing mechanism of the ventilation cabinet flow control variable air volume valve of the utility model;

[0016] Figure 3 It is a structure schematic view of the communication mechanism of the ventilation cabinet flow control variable air volume valve of the utility model;

[0017] Figure 4 It is a structure schematic view of the adjusting mechanism of the ventilation cabinet flow control variable air volume valve of the utility model.

[0018] Fig. 1, the shell; 2, the knob; 3, the fixing mechanism; 301, the clamping block; 302, the threaded column; 303, the rotating disc; 304, the bearing; 305, the fixed plate; 306, the protective gasket; 4, the communication mechanism; 401, the communication main pipe; 402, the first communication branch pipe; 403, the second communication branch pipe; 5, the pressure detection meter; 6, the adjusting mechanism; 601, the outer ring; 602, the total communication hole; 603, the first air inlet hole; 604, the first air outlet hole; 605, the air inlet chamber; 606, the air outlet chamber; 607, the inner ring; 608, the second air inlet hole; 609, the second air outlet hole; 610, the fixed cover; 7, the bottom cover. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] The working principle of the variable air volume valve is that air flows into the air door in the direction of the valve bottom, passes through the air flow measurement section, and transmits the pressure difference in the valve to the sensor in the controller through the air pipe. The sensor identifies the pressure difference data and transmits it to the chip in the controller. The chip judges according to the received signal and sends a command to the actuator, so as to realize the rotation of the air valve blade and adjust the air volume of the air valve, and ensure the constant air speed of the system. The variable air volume valve is used for laboratory exhaust, and the valve body is made of PP fireproof and flame-retardant material. Based on the Venturi principle, an air flow measurement section is built in for measuring the exhaust air volume. Air flow enters the sensor through the guide pipe to generate a flow difference. The data chip controls the actuator in digital form to automatically adjust the rotation of the disc. It is applied to chemical laboratories, biological safety laboratories, physical and chemical laboratories, animal laboratories, GMP pharmaceutical factories, isolation wards and other exhaust systems. The present application drives the inner ring to rotate by rotating the knob, so as to adjust the interval between the second air inlet hole and the first air inlet hole. In this way, the air pressure can be adjusted when the gas flows from the total communication hole through the first air inlet hole into the inside of the shell. The communication main pipe, the first communication branch pipe and the second communication branch pipe are installed in communication on the outer wall of the shell, so that multiple pipeline connections can be made. The threaded column is rotated by rotating the rotating disc, and the fixed plate is moved by the rotation of the threaded column, so as to fix the device.

[0021] As Figures 1-4The utility model provides a technical scheme: fume hood flow control variable air volume valve, including shell 1, the inside installation of shell 1 has adjusting mechanism 6, the outer wall of shell 1 is installed with fixed mechanism 3 and intercommunication mechanism 4, adjusting mechanism 6 includes outer ring 601, and the inside of outer ring 601 is fixedly connected in shell 1, and shell 1 is divided into intake chamber 605 and outlet chamber 606 through outer ring 601, and the outer wall opposite surface both sides of outer ring 601 are set with first air inlet 603 and first air outlet 604 respectively, and the inside of outer ring 601 is installed with inner ring 607, and the bottom of inner ring 607 is fixedly connected with fixed cover 610, and inner ring 607 is semicircular hollow shape, and the arc surface one side of inner ring 607 is set with second air inlet 608, and second air inlet 608 is fan shape, and the both ends of the other side of inner ring 607 are set with second air outlet 609 respectively, and the rotation of inner ring 607 is driven through rotating knob 2, to adjust the interval of second air inlet 608 and first air inlet 603 directly, so when gas flows into the inside of shell 1 from total communication hole 602 through first air inlet 603 can carry out air pressure regulation.

[0022] The outer wall one side of shell 1 is set with total communication hole 602, and the top of shell 1 is installed with rotating knob 2, and rotating knob 2 is fixed with the top of shell 1 and inner ring 607.

[0023] Intercommunication mechanism 4 includes intercommunication main pipe 401, and intercommunication main pipe 401 is connected with total communication hole 602, and the opposite side of shell 1 outer wall and intercommunication main pipe 401 is fixedly connected with pressure detection meter 5, and the remaining two sides of shell 1 outer wall are fixedly connected with first intercommunication branch pipe 402 and second intercommunication branch pipe 403 respectively, and first intercommunication branch pipe 402, second intercommunication branch pipe 403 are connected with the outer wall of shell 1 and outlet chamber 606, and the intercommunication of intercommunication main pipe 401, first intercommunication branch pipe 402 and second intercommunication branch pipe 403 is installed on the outer wall of shell 1, so multiple pipeline connection can be carried out.

[0024] Fixed mechanism 3 includes clamping block 301, and the top of clamping block 301 is fixedly connected with the outer wall of shell 1, and the top of clamping block 301 is threadedly connected with threaded column 302, and the top of threaded column 302 is fixedly connected with rotating disc 303, and the bottom of threaded column 302 is installed with bearing 304, and the inner wall of bearing 304 and the bottom outer wall of threaded column 302 are fixed, and rotating disc 303 is rotated to drive threaded column 302 to rotate, and threaded column 302 is rotated to drive fixed plate 305 to move, to fix the device.

[0025] The bottom of bearing 304 is fixedly connected with fixed plate 305, and the bottom of fixed plate 305 and the bottom inner wall of clamping block 301 are all pasted with matched protective gasket 306.

[0026] The bottom end of the shell 1 is fixedly connected with a bottom cover 7, and the outer walls of the communication main pipe 401, the first communication branch pipe 402 and the second communication branch pipe 403 are all provided with a plurality of uniformly distributed threaded grooves.

[0027] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. Fume hood flow control variable air volume valve comprising a housing (1), characterized in that: The inside of the shell (1) is provided with an adjusting mechanism (6), the outer wall of the shell (1) is provided with a fixing mechanism (3) and a communication mechanism (4), the adjusting mechanism (6) comprises an outer ring (601), the outer ring (601) is fixedly connected to the inside of the shell (1), the shell (1) is divided into an air inlet chamber (605) and an air outlet chamber (606) by the outer ring (601), the outer wall of the outer ring (601) is provided with a first air inlet hole (603) and a first air outlet hole (604) on the opposite sides, respectively, the inside of the outer ring (601) is provided with an inner ring (607), the bottom end of the inner ring (607) is fixedly connected with a fixed cover (610), the inner ring (607) is in a semicircular hollow shape, the inner ring (607) is provided with a second air inlet hole (608) on one side of the arc surface, the second air inlet hole (608) is in a fan shape, the other side of the inner ring (607) is provided with a second air outlet hole (609) at both ends, respectively.

2. The fume hood flow control variable air volume valve of claim 1, wherein: The outer wall of the shell (1) is provided with a total communication hole (602) on one side, the outer wall of the shell (1) is provided with a knob (2) at the top end, the knob (2) penetrates the top end of the shell (1) and is fixed with the inner ring (607).

3. The fume hood flow control variable air volume valve of claim 2, wherein: The communication mechanism (4) comprises a communication main pipe (401), the communication main pipe (401) is communicated with the total communication hole (602), the outer wall of the shell (1) is fixedly connected with a pressure detection meter (5) on the side opposite to the communication main pipe (401), the remaining two sides of the outer wall of the shell (1) are fixedly connected with a first communication branch pipe (402) and a second communication branch pipe (403), respectively, the first communication branch pipe (402) and the second communication branch pipe (403) penetrate the outer wall of the shell (1) and are communicated with the air outlet chamber (606).

4. The fume hood flow control variable air volume valve of claim 1, wherein: The fixing mechanism (3) comprises a clamping block (301), the clamping block (301) is fixedly connected to the top end of the outer wall of the shell (1), the top end of the clamping block (301) is threadedly connected with a threaded column (302), the top end of the outer wall of the threaded column (302) is fixedly connected with a rotating disc (303), the bottom end of the outer wall of the threaded column (302) is provided with a bearing (304), the inner wall of the bearing (304) is fixedly connected with the bottom end of the outer wall of the threaded column (302).

5. The fume hood flow control variable air volume valve of claim 4, wherein: The bottom end of the bearing (304) is fixedly connected with a fixed plate (305), the bottom end of the fixed plate (305) and the bottom end of the inner wall of the clamping block (301) are both pasted with a matching protective gasket (306).

6. The fume hood flow control variable air volume valve of claim 3, wherein: The bottom end of the shell (1) is fixedly connected with a bottom cover (7), the outer wall of the communication main pipe (401), the first communication branch pipe (402) and the second communication branch pipe (403) are all provided with a plurality of evenly distributed threaded grooves.

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