CN202834251U

CN202834251U - Flow measuring and controlling V-shaped valve

Info

Publication number: CN202834251U
Application number: CN201220333836XU
Authority: CN
Inventors: 金华明
Original assignee: Wuxi GL Turbo Compressor Co Ltd
Current assignee: Gl-Turbo LLC
Priority date: 2012-07-10
Filing date: 2012-07-10
Publication date: 2013-03-27
Anticipated expiration: 2022-07-10

Abstract

The utility model relates to a flow measuring and controlling V-shaped valve, in particular to a special device which is used for accurately measuring and controlling air flow on a sewage treatment accurate aerating system. The flow measuring and controlling V-shaped valve comprises a valve body, a valve plate, a valve front pipeline, a valve rear pipeline and a wind differential pressure transformer. The valve plate is arranged inside the valve body, and a sealing ring is arranged on the valve body. The flow measuring and controlling V-shaped valve is characterized in that a positive pressure connector of the wind differential pressure transformer is connected with an inner cavity of the valve front pipeline through a positive pressure connecting pipe, a negative pressure connector of the wind differential pressure transformer is connected with an inner cavity of the valve rear pipe through a negative pressure connecting pipe, the valve front pipeline is arranged at the front end of the valve body, and the valve rear pipeline is arranged at the rear end of the valve body. The flow measuring and controlling V-shaped valve is good in stability, large in flow adjusting range, high in measuring precision, and can fully satisfy the requirement to adjust in real-time of the air flow of the sewage treatment accurate aerating system. Variation of the flow and opening of the valve plate are in a good linear relation, and good air linear adjusting is achieved.

Description

The V-arrangement valve of flow measurement and control

Technical field

The utility model relates to the V-arrangement valve of a kind of flow measurement and control, specifically is used for accurately measuring and controlling in the sewage treatment accurate aeration system isolated plant of air mass flow, belongs to the mechanical structure technical field.

Background technique

In existing technology, in the sewage treatment accurate aeration system, all adopt control valve and gas flowmeter to be installed in series, flowmeter is positioned near on the export pipeline of control valve, the signal feed back that flowmeter detects is given intelligent automatic control system, by control system will be corresponding with technological requirement the order input control valve, make control valve move to realize instant adjusting to flow, thereby satisfy in the sewage treatment process each stage to the different requirements of air mass flow.This flowmeter belongs to the thermal type flowmeter, its principle is the variation of trying to achieve gas flow by the temperature variation of detecting head, because the complexity of the motion of the pressure air in the pipeline and the nonuniformity of temperature distribution, low, the poor stability of the measuring accuracy that has determined this type of flowmeter can't satisfy the accurate aeration system to the accuracy of flow control.Simultaneously, common control valve runner is rounded, and when valve plate was opened closure, the linear relationship of changes in flow rate and valve plate aperture was relatively poor, thereby also exists the linear poor shortcoming of air conditioning, does not reach desirable energy-conservation requirement.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned deficiency, thereby provide the V-arrangement valve of a kind of flow measurement and control, its good stability, flow adjustment range is large, measuring accuracy is high, can satisfy sewage treatment accurate aeration system fully to the instant requirement of regulating of air mass flow.

According to the technological scheme that the utility model provides, the V-arrangement valve of flow measurement and control comprises pipeline and wind differential pressure transmitter behind valve body, valve plate, valve preceding pipeline, the valve; In the described valve body valve plate is housed, is provided with seal ring on the valve body; Feature is: the positive pressure interface of described wind differential pressure transmitter is connected by the inner chamber of positive aluminium hydraulic pressed connecting pipe with the valve preceding pipeline, the negative pressure interface of described wind differential pressure transmitter is taken over the inner chamber of pipeline behind the valve by negative pressure and is connected, described valve preceding pipeline is arranged on the valve body front end, and install pipeline is at valve rear end behind the valve.

As further improvement of the utility model, the tie point of described valve preceding pipeline and positive aluminium hydraulic pressed connecting pipe is arranged on pipeline center's face with the keying perpendicular direction of valve plate, and with the axial distance of the median plane of valve plate be X.

As further improvement of the utility model, the tie point that pipeline and negative pressure are taken over behind the described valve is arranged on pipeline center's face with the keying perpendicular direction of valve plate, and with the axial distance of the median plane of valve plate be X.

As further improvement of the utility model, the axial distance of the median plane of described valve plate is that the ratio X/D of X and valve preceding pipeline inside diameter D is less than or equal to 1.

As further improvement of the utility model, the axial distance of the median plane of described valve plate is that the ratio X/D of internal diameter of the pipeline D behind X and the valve is less than or equal to 1.

As a further improvement on the present invention, described valve plate is plate shaped, and the bottom of valve plate is straight line, and valve plate thickness W generally is not more than 20mm, and the runner that valve plate and valve body form is teacup shape.

Compared with the prior art the utility model has the following advantages:

The utility model is simple in structure, compact, reasonable; Good stability, flow adjustment range is large, measuring accuracy is high, can satisfy sewage treatment accurate aeration system fully to the instant requirement of regulating of air mass flow, has obvious energy-saving effect.Simultaneously, the control valve runner is teacup shape, and when valve plate was opened closure, changes in flow rate and valve plate aperture were preferably linear relationship, has good air conditioning linearity.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the B-B sectional view of Fig. 1.

Embodiment

Following the utility model is further described in connection with accompanying drawing:

Such as Fig. 1, Fig. 2, shown in Figure 3: it comprises that pipeline 5 behind valve body 1, seal ring 2, valve plate 3, valve preceding pipeline 4, the valve, wind differential pressure transmitter 6, positive aluminium hydraulic pressed connecting pipe 7, negative pressure take over 8 etc.

In the described valve body 1 valve plate 3 is housed, is provided with seal ring 2 on the valve body 1.The positive pressure interface of described wind differential pressure transmitter 6 is connected with the inner chamber of valve preceding pipeline 4 by positive aluminium hydraulic pressed connecting pipe 7, the negative pressure interface of described wind differential pressure transmitter 6 is taken over 8 by negative pressure and is connected with the inner chamber of pipeline 5 behind the valve, described valve preceding pipeline 4 is arranged on valve body 1 front end, and pipeline 5 is arranged on valve body 1 rear end behind the valve.Described valve plate 3 is plate shaped, and the bottom of valve plate 3 is straight line, and valve plate thickness W generally is not more than 20mm, and valve plate 3 is teacup shape with the runner that valve body 1 forms;

The tie point of described valve preceding pipeline 4 and positive aluminium hydraulic pressed connecting pipe is arranged on pipeline center's face with the keying perpendicular direction of valve plate 3, and with the axial distance of the median plane of valve plate 3 be X, X is 130mm; The tie point that pipeline 5 and negative pressure are taken over behind the described valve is arranged on pipeline center's face with the keying perpendicular direction of valve plate 3, and with the axial distance of the median plane of valve plate 3 be X, X is 130mm.

The axial distance of the median plane of described valve plate 3 is that the ratio X/D of X and valve preceding pipeline 4 inside diameter D is less than or equal to 1.

The axial distance X of the median plane of described valve plate 3 be with valve after the ratio Y/D of pipeline 5 inside diameter D less than or equal to 1.

Arrow Q is the pressure air flow direction.In the test and engineering practice of accurate aeration system,

The aeration rate in each stage (being air mass flow) is different, when technological requirement changes flow, the signal feed back that differential pressure transmitter 6 will detect immediately is to intelligent control system, system can automatically identify instant flow and whether meet technological requirement, and the transmission instruction moves up and down valve plate 3, until the aperture of valve plate 3 meets command request (moving to dotted line position such as valve plate among Fig. 3 3) fully, this moment, ducted air mass flow met the instant flow of technological requirement.

Claims

1. the V-arrangement valve of flow measurement and control comprises pipeline (5) and wind differential pressure transmitter (6) behind valve body (1), valve plate (3), valve preceding pipeline (4), the valve; Valve plate (3) is housed in the described valve body (1), is provided with seal ring (2) on the valve body (1); It is characterized in that: the positive pressure interface of described wind differential pressure transmitter (6) is connected by the inner chamber of positive aluminium hydraulic pressed connecting pipe (7) with valve preceding pipeline (4), the negative pressure interface of described wind differential pressure transmitter (6) takes over by negative pressure that the inner chamber of pipeline (5) is connected behind (8) and the valve, described valve preceding pipeline (4) is arranged on valve body (1) front end, and pipeline behind the valve (5) is arranged on valve body (1) rear end.

2. the V-arrangement valve of flow measurement as claimed in claim 1 and control, it is characterized in that: the tie point of described valve preceding pipeline (4) is arranged on pipeline center's face with the keying perpendicular direction of valve plate (3), and with the axial distance of the median plane of valve plate (3) be X, the X distance is 130mm.

3. the V-arrangement valve of flow measurement as claimed in claim 1 and control, it is characterized in that: the tie point on the pipeline behind the described valve (5) is arranged on pipeline center's face with the keying perpendicular direction of valve plate (3), and with the axial distance of the median plane of valve plate (3) be X, the X distance is 130mm.

4. the V-arrangement valve of flow measurement as claimed in claim 2 and control, it is characterized in that: the ratio X/D of the axial distance X of the median plane of described valve plate (3) and valve preceding pipeline (4) inside diameter D is less than or equal to 1.

5. the V-arrangement valve of flow measurement as claimed in claim 3 and control, it is characterized in that: the ratio X/D of pipeline (5) inside diameter D is less than or equal to 1 behind the axial distance X of the median plane of described valve plate (3) and the valve.

6. the V-arrangement valve of flow measurement as claimed in claim 1 and control, it is characterized in that: described valve plate (3) is plate shaped, and the bottom of valve plate (3) is straight line, and valve plate thickness W is not more than 20mm.