Venturi variable air volume valve

Abstract

The utility model discloses a venturi variable air volume valve which comprises a valve body, a valve element and a valve rod are arranged in the valve body, the valve rod is arranged on the valve body through a plurality of supporting frames, installing flanges are arranged on the two sides of the valve body, an installing plate is arranged on the valve body, an executing mechanism is arranged on the installing plate, and the executing mechanism is arranged on the valve body. The executing mechanism is connected with the valve rod through the connecting rod assembly, and the control module is electrically connected with the executing mechanism and sends a working instruction to the executing mechanism so as to control stretching and maintaining of the push rod. The electromagnetic actuating mechanism linearly pushes the push rod to stretch out and draw back, the connecting rod mechanism drives the valve rod to achieve air volume adjustment, the structure is simplified, air volume control stability and reliability are improved, product fault points can be effectively reduced, and daily maintenance workload is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve technical field especially relates to a venturi variable air volume valve. BACKGROUND

[0002] The venturi valve combines the mechanical pressure-independent regulator with the high-speed positioning / air flow controller to meet the unique demand of air flow control, can be used in constant air volume control, bistable control or variable air volume control application, is generally designed to maximize the performance of air flow while reducing the relevant noise, and is widely applied in biological product production plants, toxic and harmful, chemical laboratories and biological safety laboratories (such as P3-grade biological laboratories) and other places requiring control of negative pressure. The structure of the venturi valve actuator of the prior art is complex, the air volume control is unstable, the product failure rate is high, and the daily maintenance workload is increased. For the traditional venturi valve, no flange is configured, and site hole insertion or self-tapping connection is required, which is inconvenient to install. SUMMARY

[0003] The utility model aims at solving the above technical problem, provides a venturi variable air volume valve.

[0004] In order to realize the above technical purpose, achieve the above technical requirements, the utility model adopts the technical scheme: a venturi variable air volume valve, including valve body, the valve body is provided with valve core, valve rod, the valve rod is set on the valve body through a plurality of support frames, the both sides of the valve body are provided with mounting flange, the valve body is provided with mounting plate, the mounting plate is provided with actuator, the actuator is connected with the valve rod through connecting rod assembly, control module is electrically connected with the actuator, and the working instruction is sent to the actuator to control the telescopic and keep of push rod;The actuator includes static core, moving core, the moving core is provided with power output shaft, the power output shaft passes through the moving core, static core and is connected with connecting rod assembly, coil A, permanent magnet, coil B are sequentially arranged on the moving core.

[0005] Preferably, the coil A and the coil B are reversely wound.

[0006] Preferably, the connecting rod mechanism includes a push rod, a transmission rod and a connecting rod, the push rod is connected with the power output shaft, the transmission rod is hingedly connected with the push rod and the connecting rod, an annular shaft sleeve is sleeved on the transmission rod, and a rotating shaft passes through the annular shaft sleeve and the transmission rod and is arranged on the support, so that the swing of the transmission rod is more stable.

[0007] Preferably, a position sensor is arranged on the actuator.

[0008] Compared with the traditional structure, the beneficial effects of the utility model are: adopting electromagnetic actuating mechanism linearly pushing push rod telescopic movement, realizing air volume regulation through connecting rod mechanism driving valve rod, simplifying structure, improving air volume control stability and reliability, can effectively reduce product fault point, greatly reducing daily maintenance workload. The valve body is equipped with flange and matched flange at both ends, and the on-site installation is very convenient. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a structure schematic view of the utility model;

[0010] In the drawing: 1. valve body, 2. mounting flange, 3. valve rod, 4. valve core, 5. support frame, 6. connecting rod assembly, 61. push rod, 62. annular shaft sleeve, 63. transmission rod, 64. connecting rod, 65. support, 7. actuating mechanism, 71. power output shaft, 72. coil B, 73. permanent magnet, 74. moving iron core, 75. coil A, 76. static iron core, 8. mounting plate. DETAILED DESCRIPTION

[0011] The utility model will be further explained below.

[0012] Referring to the accompanying Figure 1 A venturi variable air volume valve, including valve body 1, be provided with valve core 4, valve rod 3 in valve body 1, valve rod 3 is set up on valve body 1 through several support frames 5, the both sides of valve body 1 are provided with mounting flange 2, be provided with mounting plate 8 on valve body 1, be provided with actuating mechanism 7 on mounting plate 8, actuating mechanism 7 is connected with valve rod 3 through connecting rod assembly 6, control module is electrically connected actuating mechanism 7;Actuating mechanism 7 includes static iron core 76, moving iron core 74, be provided with power output shaft 71 in moving iron core 74, power output shaft 71 passes through moving iron core 74, static iron core 76 and is connected with connecting rod assembly 6, coil A 75, permanent magnet 73, coil B 72 are sequentially provided on moving iron core 74.

[0013] In the preferred embodiment, the coil A 75 and the coil B 72 are oppositely wound.

[0014] In the preferred embodiment, the connecting rod mechanism 6 includes a push rod 61, a transmission rod 63, and a connecting rod 64. The push rod 61 is connected to the power output shaft 71. The transmission rod 63 is hingedly connected to the push rod 61 and the connecting rod 64. The transmission rod 63 is sleeved with an annular shaft sleeve 62. The shaft passes through the annular shaft sleeve 62 and the transmission rod 63 and is arranged on the support 65, so that the swing of the transmission rod 63 is more stable.

[0015] In the preferred embodiment, the actuating mechanism 7 is provided with a position sensor. The control module and the position sensor are connected by signals.

[0016] In the embodiment, the coil A 75 and the coil B 72 of the actuator 7 are not energized, the permanent magnet 73 keeps the moving iron core 74 in place by the low magnetic resistance channel provided by the static iron core 76 and the moving iron core 74. When the air volume needs to be adjusted, the control module energizes the coil B 72 in the actuator 7, the static iron core 76 and the moving iron core 74 generate the magnetic motive force superimposed by the magnetic field generated by the permanent magnet 73 and the coil B 72, the moving iron core 74 is subjected to the axial electromagnetic force and moves linearly, drives the push rod 61 to move, drives the valve rod 3 and the valve core 4 to move through the connecting rod mechanism 6, and air volume adjustment is realized. Since the permanent magnetic force generated by the electromagnetic actuator 7 itself is used to realize the air volume adjustment and the holding function, any mechanical interlocking does not need to be additionally installed, the structure is further simplified, the stability of the air volume adjustment is improved, and the manufacturing and maintenance costs are low. The valve is made of 304 stainless steel material, the thickness reaches 2.0-2.5 mm, and a flange is configured, so that the strength of the valve body is effectively guaranteed.

[0017] The above-mentioned embodiments of the utility model are only used to clearly illustrate the examples made by the utility model, but not used to limit the protection scope of the utility model, all equivalent technical solutions also belong to the scope of the utility model, and the patent protection scope of the utility model should be limited by various claims.

Claims

1. A Venturi variable air volume valve, comprising a valve body (1), a valve core (4) and a valve rod (3) arranged in the valve body (1), the valve rod (3) being arranged on the valve body (1) by a plurality of support frames (5), characterized in that: The valve body (1) is provided with mounting flanges (2) on both sides, the valve body (1) is provided with a mounting plate (8), the mounting plate (8) is provided with an actuator (7), the actuator (7) is connected with a valve stem (3) through a connecting rod assembly (6), and a control module is electrically connected with the actuator (7); the actuator (7) comprises a static iron core (76) and a moving iron core (74), the moving iron core (74) is provided with a power output shaft (71) therein, the power output shaft (71) is connected with the connecting rod assembly (6) through the moving iron core (74) and the static iron core (76), and the moving iron core (74) is sequentially provided with a coil A (75), a permanent magnet (73) and a coil B (72).

2. The venturi variable air volume valve of claim 1, wherein: The coil A (75) and the coil B (72) are oppositely wound.

3. The venturi variable air volume valve of claim 1, wherein: The connecting rod assembly (6) comprises a push rod (61), a transmission rod (63) and a connecting rod (64), the push rod (61) is connected with the power output shaft (71), the transmission rod (63) is hingedly connected with the push rod (61) and the connecting rod (64) respectively, the transmission rod (63) is provided with an annular shaft sleeve (62), a rotating shaft is arranged on a support (65) through the annular shaft sleeve (62) and the transmission rod (63), so that the swing of the transmission rod (63) is more stable.

4. The venturi variable air volume valve of claim 1, wherein: The actuator (7) is provided with a position sensor.

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