CN210034457U - Flue butterfly valve for zero leakage of flue gas emission - Google Patents

Abstract

The utility model provides a flue butterfly valve for zero leakage of fume emission. The butterfly valve is characterized in that pressing rings are respectively arranged at the upper end and the lower end of the valve body, fluoroplastic cloth is stretched on the pressing rings to form a hollow cylinder, the butterfly plate is arranged in the cylinder formed by the fluoroplastic cloth, the pressing rings at the two ends are respectively connected with the valve body through connecting bolts, an air nozzle and a pressure measuring meter interface are respectively arranged on the valve body, and the air nozzle and the pressure measuring meter interface are respectively communicated with an air passage in the butterfly valve. The valve body is provided with an air nozzle connected with external supercharging equipment, and a pressure gauge interface connected with a pressure gauge. The valve seat of the valve body is made of the fluoroplastic cloth, the rigid valve seat is replaced by the flexible fluoroplastic cloth, so that the precision machining of the sealing surface of the valve body, namely the valve seat, is not needed, fluoroplastic has non-stick performance, the valve seat has a self-cleaning function, the size of the valve seat can be effectively controlled through an externally-matched air source, and the purpose of controlling the sealing performance of the valve on line is achieved.

Description

Flue butterfly valve for zero leakage of flue gas emission

Technical Field

The utility model relates to valve and machinery, in particular to a flue butterfly valve for zero leakage of fume emission.

Background

At present, the consensus in the whole world is that people must effectively protect the environment in the transformation life process, and the transformation of the energy is the indispensable content in people's life process, and the production and the emission of the indispensable flue gas that is exactly in the energy conversion have made strict management and control procedure for this country, and the performance that realizes the flue gas discharge valve up to standard is just vital.

The closed flue butterfly valve in the prior art is realized by adopting the interference fit of a butterfly plate 6 and a valve seat 15 of a valve body (see figures 4 and 5) to form a sealing specific pressure. The sealing problem between the front half shaft 3 and the rear half shaft 11 and the valve body 7 is mainly solved in the prior art, and the functional requirement is realized, wherein firstly, the butterfly valve seat 15 needs to be precisely machined to achieve the precision and the roughness of the sealing requirement, and in addition, because the relative motion of the butterfly plate 6 and the valve body seat 15 is realized under the interference sealing condition, the butterfly plate 6 has enough strength and rigidity, and all parts in the whole working process are ensured to keep unchanged in shape, the operating torque is large, and the manufacturing cost is high. Secondly, after the production of the butterfly valve product is finished, the sealing performance of the butterfly valve product is fixed, the abrasion degree of the outer circle of the butterfly plate 6 and the valve seat 15 of the valve body is increased along with the increase of the opening and closing times, and the sealing performance can be gradually reduced. The online working process cannot be controlled, the maintenance cost is very high, and a great deal of inconvenience is brought to the production. Thirdly, the diameter of the flue is large in the process of energy conversion, the pressure is low, the components of the flue gas are complex, and certain corrosion and cohesiveness are provided, so that the difficulty is increased for the selection and maintenance of the manufacturing materials of the valve, and the application cost is high.

Therefore, the development of a butterfly valve with high performance reliability and low cost is a very urgent requirement in the process of energy conversion.

Disclosure of Invention

An object of the utility model is to provide a flue butterfly valve for zero leakage of fume emission.

The design idea of the utility model is to adopt the fluoroplastic cloth to make the disk seat that causes the valve body, replace rigid disk seat with flexible fluoroplastic cloth, consequently need not carry out precision finishing to the sealed face of valve body promptly disk seat. The atmospheric pressure in the disk seat air flue that the fluoroplastic cloth made before the butterfly plate is rotatory is the negative value, the fluoroplastic cloth valve seat of software internal diameter size grow under the effect of gas force like this, when rotatory butterfly plate, the disk seat that the butterfly plate and fluoroplastic cloth made almost contactless, consequently, the very little operating condition of operating torque just can be realized, the butterfly plate is closed the back that targets in place, change external air supply state through the air cock of dress, make the atmospheric pressure in the air flue be the positive value, the disk seat that the fluoroplastic cloth made produces the deformation under the effect of gas pressure, the internal diameter size diminishes, thereby hug closely on the butterfly plate garden, establish reliable sealed specific pressure, the flue gas just can not pass through the butterfly valve like this, reach the purpose of reliably cuting the flue gas.

In order to achieve the above purpose, the technical scheme of the utility model is that:

the utility model provides a flue butterfly valve for zero leakage of fume emission, includes butterfly plate, valve body, clamping ring, fluorine plastic cloth, air cock and pressure meter interface, wherein installs operating device at the support tip and is connected with the preceding semi-axis of dress on the support, and the both ends of the butterfly plate in the valve body are connected with preceding semi-axis and latter semi-axis respectively, are equipped with the sealing filler between valve body and preceding semi-axis and the latter semi-axis to it is tight to cover with the gland, the butterfly valve is equipped with the clamping ring respectively at the upper and lower both ends of valve body, and the fluorine plastic cloth that has stretched over on the clamping ring forms hollow cylinder, and the butterfly plate is installed in the cylinder that fluorine plastic cloth formed, and the clamping ring at both ends is connected with the valve body with connecting bolt respectively, is equipped with air cock and pressure meter interface on the valve body respectively, and air cock and pressure meter interface are.

The butterfly valve is connected with external supercharging equipment through an air tap arranged on the valve body, and a pressure gauge connector is connected with a pressure gauge.

Compared with the prior art, the utility model discloses an actively the effect does:

1. the valve seat of the valve body is made of the fluoroplastic cloth, and the rigid valve seat is replaced by the flexible fluoroplastic cloth, so that the sealing surface of the valve body, namely the valve seat, does not need to be precisely machined;

2. the valve seat of the butterfly valve is made of fluoroplastic cloth, and fluoroplastic has non-stick performance, so the valve seat has a self-cleaning function;

3. the valve seat of the butterfly valve adopts the fluorine plastic cloth which is made of soft material and has better deformation compensation performance;

4. the valve seat of the butterfly valve is established on the air passage, and the pressure in the air passage of the butterfly valve can be controlled through externally-arranged air pressurization equipment, so that the expansion size of the valve seat is effectively controlled by gas, and the aim of controlling the sealing performance of the valve on line is fulfilled;

5. the fluoroplastic cloth valve seat of the butterfly valve is tightly matched with the circumference of the butterfly plate, so that the tightness can be controlled through an external air source, namely the opening and closing torque of the operating valve can be artificially controlled, the requirements on the strength and rigidity of structural parts of the butterfly valve are low, the integral manufacturing cost of the butterfly valve is obviously reduced, and the precondition is created for the wide application of the butterfly valve.

Drawings

FIG. 1 is a schematic structural diagram of a flue butterfly valve for zero leakage of flue gas emission;

FIG. 2 is a schematic side view of a flue butterfly valve for zero leakage of flue gas emission;

FIG. 3 is an enlarged view of a butterfly valve C of the flue;

FIG. 4 is a schematic diagram of a butterfly valve structure of a prior art flue;

FIG. 5 is a schematic side view of a butterfly valve of a prior art flue.

In the figure: 1. the device comprises an operating mechanism, 2, a support, 3, a front half shaft, 4, a packing gland, 5, sealing packing, 6, a butterfly plate, 7, a valve body, 8, a pressing ring, 9, fluoroplastic cloth, 10, an air nozzle, 11, a rear half shaft, 12, a pressure measuring meter interface, 13, an air passage, 14, a connecting bolt, 15 and a valve body valve seat.

Detailed Description

The technical solution of the present invention will be further clearly and completely described with reference to the accompanying drawings and examples.

Referring to the attached drawings 1-3, in the butterfly valve, an operating mechanism 1 installed at the end of a bracket 2 is connected with a front half shaft 3 installed on the bracket 2, two ends of a butterfly plate 6 in a valve body 7 are respectively connected with the front half shaft 3 and a rear half shaft 11, a sealing filler 5 is installed between the valve body 7 and the front half shaft 3 and the rear half shaft 11 and is tightly covered by a filler gland 4, pressing rings 8 are respectively installed at the upper end and the lower end of the valve body 7, fluorine plastic cloth 9 is tightly installed on the pressing rings 8 to form a hollow cylinder, the butterfly plate 6 is installed in the cylinder formed by the fluorine plastic cloth 9, the pressing rings 8 at the two ends are respectively connected with the valve body 7 by connecting bolts 14, an air nozzle 10 and a pressure measuring meter interface 12 are respectively installed on the valve body 7, and the air nozzle 10 and the pressure measuring meter interface.

An air tap 10 arranged on the valve body 7 of the butterfly valve is connected with external supercharging equipment, and a pressure measuring meter interface 12 is connected with a pressure measuring meter.

When the butterfly valve is used, the driving mechanism 1 drives the front half shaft 3 arranged on the support 2 to rotate according to the driving mode, so that the butterfly plates 6 fixedly arranged on the front half shaft 3 and the rear half shaft 11 are driven to rotate within a 90-degree range, the area of the butterfly plates 6 on the channel section in the valve body 7 is changed, and the purpose of cutting off smoke in the valve body 7 or communicating the smoke is achieved. When the pipeline smoke needs to be cut off, the butterfly plate 6 rotates 90 degrees from the opening state to the closing state, the air pressure in the air passage of the valve seat made of the fluoroplastic cloth 9 is a negative value before the butterfly plate 6 rotates, so that the inner diameter of the valve seat made of the soft fluoroplastic cloth 9 is increased under the action of the air pressure, and when the butterfly plate 6 rotates, the hard butterfly plate 6 is hardly contacted with the valve seat made of the soft fluoroplastic cloth 9, so that the small moment in operation can be realized. After the butterfly plate 6 is closed in place, the pressure state is changed through the air nozzle 10 and the external air source, so that the air pressure in the butterfly valve air passage 13 is increased to a positive value, the valve seat made of the fluoroplastic cloth 9 is deformed under the action of the air pressure, and the inner diameter size is reduced, so that the valve seat is tightly attached to the periphery of the butterfly plate 6, reliable sealing specific pressure is established, smoke cannot pass through the butterfly valve, and the purpose of reliably cutting off the air is achieved.

An air tap 10 arranged on the valve body 7 is connected with external air compression equipment, and compressed air is input through the air tap 10 to adjust the pressure in the butterfly valve air passage 13. When the butterfly valve works and the pressure in the butterfly valve needs to be detected, the pressure gauge is connected through the pressure gauge interface 12 on the valve body 7, and the pressure in the butterfly valve air passage 13 is detected on line.

After the sealing packing 5 arranged between the front half shaft 3, the rear half shaft 11 and the valve body 7 is compressed by the packing gland 4, the front half shaft 3, the rear half shaft 11 and the valve body 7 generate a good sealing state.

The above description is only a non-limiting embodiment of the present invention, and many embodiments can be derived, and it will be apparent to those skilled in the art that many modifications and improvements can be made without departing from the inventive concept and without making creative efforts, and these embodiments are all within the protection scope of the present invention.

Claims (2)

1. The utility model provides a flue butterfly valve for zero leakage of fume emission, including butterfly plate (6), valve body (7), clamping ring (8), fluoroplastic cloth (9), air cock (10) and pressure meter interface (12), wherein install operating device (1) and the preceding semi-axis (3) of dress on support (2) at support (2) tip and be connected, the both ends of butterfly plate (6) in valve body (7) are connected with preceding semi-axis (3) and rear half axle (11) respectively, be equipped with between valve body (7) and preceding semi-axis (3) and rear half axle (11) and seal packing (5) to it is tight to cover gland (4), its characterized in that: the butterfly valve is characterized in that clamping rings (8) are respectively installed at the upper end and the lower end of a valve body (7), fluoroplastic cloth (9) is stretched on the clamping rings (8) to form a hollow cylinder, a butterfly plate (6) is installed in the cylinder formed by the fluoroplastic cloth (9), the clamping rings (8) at the two ends are respectively connected with the valve body (7) through connecting bolts (14), an air nozzle (10) and a pressure measuring meter interface (12) are respectively installed on the valve body (7), and the air nozzle (10) and the pressure measuring meter interface (12) are respectively communicated with an air passage (13) in the butterfly valve.

2. The flue butterfly valve for zero leakage of flue gas emissions of claim 1, wherein: an air tap (10) arranged on the valve body (7) of the butterfly valve is connected with external supercharging equipment, and a pressure gauge connector (12) is connected with a pressure gauge.

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