CN212657256U - Poppet valve device for heat accumulating type incinerator - Google Patents

Abstract

The utility model relates to a poppet valve device for a regenerative incinerator, which comprises a valve cover, a poppet valve rod, a poppet valve shaft head, a centering device and a sealing device; the valve cover mainly comprises a sealing valve plate, a reinforcing valve plate, a ring rib, a longitudinal rib, a shaft sleeve and a valve plate fastener; the valve rod of the lift valve mainly comprises a valve rod, a valve rod flange, a head dismounting flange, a valve rod flange fastener and a heat insulation block; the centering device mainly comprises a centering piece base, a centering piece bracket, a centering piece pressing plate, a pressing plate fastener and a bottom plate fastener; the sealing device mainly comprises a pressing plate fastener, a pressing plate, a packing flange, a seat plate flange, a seat mortar body, a sealing element, a sealing plate flange, a sealing plate fastener, a sleeve and a sleeve reinforcement. The utility model has the advantages that: the device comprises an inner seal and an outer seal, namely the seal between a valve cover and a valve seat and the seal between a sealing plate flange and a valve rod; adopt PTFE packing to seal between shrouding flange and the valve rod, the difficult adhesion that takes place of PTFE material frictional resistance for a short time.

Description

Poppet valve device for heat accumulating type incinerator

Technical Field

The utility model relates to a fields such as electric power, petrochemical industry, VOCs administer, concretely relates to regenerative incinerator is with poppet valve device.

Background

The regenerative incinerator is an organic waste gas treatment device, and organic waste gas can be incinerated and decomposed into clean flue gas such as carbon dioxide, water vapor and the like through the device. The device comprises a combustion chamber, a heat accumulation chamber and the like. Wherein, the combustion chamber provides the place for the burning decomposition of waste gas, and the heat accumulation cell has then ensured the waste heat recovery of preheating of organic waste gas and clean flue gas. The bottom of the heat storage small chamber is provided with a waste gas inlet and a clean smoke exhaust port, and a lift valve communicated with the gas inlet and exhaust ports is opened and closed alternately to ensure the inflow of waste gas and the outflow of clean smoke. The sealing performance of the poppet valve is a key factor influencing continuous and stable operation of equipment.

Poppet valves are generally composed of a valve cover, a valve rod, a driving device and the like, wherein factors such as flatness of the valve cover and coaxiality of the valve rod and a valve seat can significantly affect the sealing performance of the poppet valve. When the size of the poppet valve cover is small, the flatness of the valve cover is relatively easy to control, but when the size of the valve cover is large, the flatness of the thin plate is difficult to guarantee. In the past, the valve cover of the lift valve is mostly formed by welding a large steel plate and a small steel plate, and because the valve plate is thin, welding deformation is easy to cause, the hidden trouble of poor sealing exists, and continuous and stable operation of equipment is easily influenced. Also, when the poppet valve stroke is long, the coaxiality of the valve stem and the valve seat is difficult to ensure when the poppet valve reciprocates due to the long length of the valve stem.

Aiming at the situation that the flatness of a valve cover of a large-size poppet valve and the coaxiality of a valve rod are difficult to ensure, a poppet valve device for a regenerative incinerator needs to be provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough among the prior art, provide a regenerative incinerator is with poppet valve device, solved current jumbo size poppet valve gap roughness, the problem that the coaxial rate of valve rod disk seat is difficult to the assurance.

The lift valve device for the heat accumulating type incinerator comprises a valve cover, a lift valve rod, a lift valve shaft head, a centering device and a sealing device;

the valve cover mainly comprises a sealing valve plate, a reinforcing valve plate, a ring rib, a longitudinal rib, a shaft sleeve and a valve plate fastener; the central hole of the sealing valve plate is provided with a shaft sleeve, and the reinforced valve plate is welded on the outer side of the shaft sleeve; the annular ribs and the longitudinal ribs are welded on the surface of the reinforced valve cover; the sealing valve plate and the reinforcing valve plate are connected and fixed through a valve plate fastener; a labyrinth sealing element is arranged between the valve cover and the valve seat;

the valve rod of the lift valve mainly comprises a valve rod, a valve rod flange, a head dismounting flange, a valve rod flange fastener and a heat insulation block; the lift valve shaft head mainly comprises a shaft head, a shaft head gasket, a shaft head nut and a shaft head fastening nut; the valve rod is connected with the shaft head plug in a welding way; the valve rod flange is welded at the end part of the valve rod, and the heat insulation block, the valve rod flange and the head dismounting flange are fixedly connected through a valve rod flange fastener; the valve cover penetrates through the shaft head and is fixed through a shaft head gasket, a shaft head nut and a shaft head fastening nut;

the centering device mainly comprises a centering piece base, a centering piece bracket, a centering piece pressing plate, a first pressing plate fastener and a bottom plate fastener; the centering piece base is fixedly connected with the centering piece bracket through a bottom plate fastener; the centering piece is arranged on the centering piece base, the centering piece pressing plate is arranged above the centering piece, and the centering piece base, the centering piece and the centering piece pressing plate are fixedly connected through a first pressing plate fastener; the valve rod penetrates through the centering piece;

the sealing device mainly comprises a second pressure plate fastener, a pressure plate, a packing flange, a seat plate flange, a seat mortar body, a sealing element, a sealing plate flange, a sealing plate fastener, a sleeve and a sleeve reinforcement; the upper end and the lower end of the sleeve are respectively provided with a seat plate flange and a sealing plate flange; seat mortar bodies are respectively welded on the seat plate flange and the seal plate flange, and the sealing elements are arranged in the seat mortar bodies; the packing flange is formed by splicing two semicircular annular flanges, the pressing plate is positioned on the packing flange, the packing flange is fixedly connected with the pressing plate, the seat plate flange and the seat mortar body through second pressing plate fasteners, and the packing flange is fixedly connected with the pressing plate, the closing plate flange and the seat mortar body through second pressing plate fasteners; the sealing plate flange, the sleeve and the sleeve reinforcement are mutually welded and fixed; the sealing plate flange and the poppet valve air inlet and exhaust pipe flange are fixedly connected through a sealing plate fastener.

Preferably, the method comprises the following steps: the sealing valve plate is a round steel plate, and a through hole is formed in the center of the sealing valve plate.

Preferably, the method comprises the following steps: the centering piece is three-layer PTFE shaft sleeve, and each layer of PTFE shaft sleeve is formed by splicing two semicircular rings.

Preferably, the method comprises the following steps: the sealing member is a PTFE packing, and the inner diameter of the sealing member is smaller than the diameter of the valve rod.

Preferably, the method comprises the following steps: the labyrinth sealing element is concave high temperature resistant silica gel.

Preferably, the method comprises the following steps: the poppet valve rod outside is equipped with the safety cover, and the safety cover is located shrouding flange below, and poppet valve rod below is equipped with the cylinder.

The utility model has the advantages that:

1. the sealing effect is good. The utility model discloses it is sealed that contain inside and outside two places in the device, sealed and the shrouding flange between valve gap and the disk seat and the sealed between the valve rod promptly. The sealing between the valve cover and the valve seat is made of concave high-temperature-resistant silica gel, so that labyrinth sealing is formed, and gas leakage is effectively prevented. Adopt PTFE packing to seal between shrouding flange and the valve rod, the little difficult emergence adhesion of PTFE material frictional resistance, sealed effect is good.

2. The processing and assembling rate is high. The utility model discloses the device adopts a large amount of bolted connection's form, when having alleviateed welding work volume, because there is not welding deformation in the sealed valve plate, the valve plate processing is accomplished and need not make level, has improved manufacturing efficiency and assembly rate. Simultaneously, centering piece and filler flange all design into detachable structure, facilitate for the maintenance of part is changed.

3. The structure is stable. The utility model discloses be equipped with the ring muscle and the vertical muscle of a certain amount on the device valve gap, guarantee that the valve plate also can possess higher intensity and rigidity under the thinner condition of self thickness. Meanwhile, the centering device and the sealing device have certain limiting effect on the valve rod, and the valve rod cannot be eccentric when being longer.

4. The service life is long. The valve cover and the valve rod are made of alloy materials, so that the valve cover and the valve rod are corrosion-resistant and long in service life.

Drawings

Fig. 1 is a schematic structural view of a poppet valve device for a regenerative incinerator (poppet valve closed state);

fig. 2 is a schematic structural view of a poppet valve device for a regenerative incinerator (poppet valve open state);

FIG. 3 is a detailed view of the centering device (wherein, a is a view of the installation position of the centering device, and b is an enlarged view of the centering device in the view a);

FIG. 4 is a detailed view of the valve cover (wherein FIG. a is a plan view of the valve cover and FIG. b is an elevation view of the valve cover);

FIG. 5 is a detailed view of a poppet head;

FIG. 6 is a schematic view of the poppet valve stem and spindle head attachment (wherein FIG. a is a detailed poppet valve stem view and FIG. b is a cross-sectional view A-A of FIG. a);

fig. 7 is a detailed view of the sealing device (wherein, fig. a is an elevation view of the sealing device, and fig. b is a plan view of the sealing device).

Description of reference numerals: 1-a centering piece base; 2-centering piece holder; 3-centering member; 4-centering member pressing plate; 5-a first platen fastener; 6-a floor fastener; 7-a sealing valve plate; 8-a reinforcing valve plate; 9-ring rib; 10-longitudinal ribs; 11-a shaft sleeve; 12-valve plate fasteners; 13-a shaft head; 14-a head gasket; 15-spindle nose nut; 16-fastening the nut with the shaft head; 17-a valve stem; 18-valve stem flange; 19-a nose flange; 20-valve stem flange fastener; 21-a heat insulation block; 22-second platen fastener; 23-a platen; 24-a packing flange; 25-seat plate flange; 26-base mortar; 27-a seal; 28-closing plate flange; 29-closure plate fasteners; 30-a sleeve; 31-sleeve reinforcement; 32-a protective cover; 33-a cylinder; 34-a labyrinth seal; 35-valve cover; 36-a centering device; 37-sealing means.

Detailed Description

The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

As shown in fig. 1 to 7, the poppet valve device for a regenerative incinerator includes a valve cover 35, a poppet valve stem, a poppet head, a centering device 36, and a sealing device 37. In particular to an air inlet and an air outlet for closing a heat accumulation chamber in a heat accumulation type incinerator. The cylinder 33 is a power source of the whole device, and drives the valve rod 17, the sealing valve plate 7 and the components thereof to reciprocate up and down. The valve rod 17 is limited through the centering piece 3, and eccentric leakage and vibration are effectively prevented. The centering member 3 and the sealing member 27 are designed to be detachable, so that the maintenance and replacement of the components are facilitated. The labyrinth seal 34 is a concave high temperature resistant rubber ring, forming a labyrinth seal structure to prevent gas leakage. The device is easy to process and manufacture, high in assembly rate, good in sealing performance and stable in structure. The valve cover and the valve rod of the lift valve are made of alloy materials, and the corrosion resistance is good. The device has good sealing performance and provides guarantee for continuous and stable operation of equipment.

The valve cover 35 consists of a sealing valve plate 7, a reinforcing valve plate 8, a ring rib 9, a longitudinal rib 10, a shaft sleeve 11 and a valve plate fastener 12; the sealing valve plate 7 is a circular steel plate with the diameter of 1200mm, the diameter of a central opening of 200mm and the thickness of 4 mm; a shaft sleeve 11 is arranged at the central opening of the sealing valve plate 7; the thickness of the reinforced valve plate 8 is about 6mm, the diameter is 800mm, and the reinforced valve plate is welded on the outer side of the shaft sleeve 11; the annular ribs 9 and the longitudinal ribs 10 are welded on the surface of the reinforced valve cover 8; the sealing valve plate 7 and the reinforcing valve plate 8 are fixedly connected through a valve plate fastener 12, so that welding deformation is avoided, and the flatness of the sealing valve plate is ensured; meanwhile, the valve cover is thick in the middle and thin in the periphery, so that the periphery of the sealing valve cover generates certain elastic deformation to play a sealing role when the poppet valve is closed.

The valve rod of the lift valve consists of a valve rod 17, a valve rod flange 18, a head-dismounting flange 19, a valve rod flange fastener 20 and a heat insulation block 21; the lifting valve spindle head consists of a spindle head 13, a spindle head gasket 14, a spindle head nut 15 and a spindle head fastening nut 16; the valve rod 17 is connected with the shaft head 13 in a plug welding way; the valve rod flange 18 is welded at the end part of the valve rod 17, and the heat insulation block 21, the valve rod flange 18 and the head dismounting flange 19 are fixedly connected through a valve rod flange fastener 20; the bonnet 35 passes through the gudgeon 13 and is secured by the gudgeon washer 14, the gudgeon nut 15 and the gudgeon fastening nut 16.

The centering device 36 consists of a centering piece base 1, a centering piece bracket 2, a centering piece 3, a centering piece pressing plate 4, a first pressing plate fastener 5 and a bottom plate fastener 6; the centering piece base 1 and the centering piece bracket 2 are fixedly connected through a bottom plate fastener 6; the centering piece 3 is arranged on the centering piece base 1, the centering piece 3 is three layers of PTFE shaft sleeves, each layer of PTFE shaft sleeve is formed by splicing two semicircular rings, and the splicing structure provides convenience for dismounting and replacing the centering piece; the centering piece pressing plate 4 is arranged above the centering piece 3, and the centering piece base 1, the centering piece 3 and the centering piece pressing plate 4 are fixedly connected through a first pressing plate fastener 5; the valve stem 17 passes through the centering member 3.

The sealing device 37 consists of a second pressure plate fastener 22, a pressure plate 23, a packing flange 24, a seat plate flange 25, a seat mortar body 26, a sealing element 27, a sealing plate flange 28, a sealing plate fastener 29, a sleeve 30 and a sleeve reinforcement 31; the upper end and the lower end of the sleeve 30 are respectively provided with a seat plate flange 25 and a sealing plate flange 28; the seat plate flange 25 and the seal plate flange 28 are respectively welded with a seat mortar body 26, a sealing element 27 is arranged inside the seat mortar body 26, the sealing element 27 is a PTFE packing, and the inner diameter of the sealing element 27 is slightly smaller than the diameter of the valve rod 17, so that the sealing effect is achieved; the packing flange 24 is formed by splicing two semicircular annular flanges, the pressing plate 23 is positioned on the packing flange 24, the packing flange 24 is fixedly connected with the pressing plate 23, the seat plate flange 25 and the seat mortar 26 through second pressing plate fasteners 22, the packing flange 24 is fixedly connected with the pressing plate 23, the closing plate flange 28 and the seat mortar 26 through the second pressing plate fasteners 22, and the packing flange is convenient to detach and maintain and replace; the sealing plate flange 28, the sleeve 30 and the sleeve reinforcement 31 are welded and fixed with each other; the sealing plate flange 28 and the poppet valve intake and exhaust pipe flange are fixedly connected through a sealing plate fastener 29.

A labyrinth sealing element 34 is adopted between a valve cover 35 of the poppet valve and a valve seat, and the labyrinth sealing element is concave high-temperature-resistant silica gel, so that gas leakage is effectively prevented.

The outer side of the valve rod of the poppet valve is provided with a protective cover 32, the protective cover 32 is positioned below the sealing plate flange 28, and the lower part of the valve rod of the poppet valve is provided with an air cylinder 33.

Claims (6)

1. A poppet valve device for a regenerative incinerator is characterized in that: comprises a valve cover (35), a poppet valve rod, a poppet valve shaft head, a centering device (36) and a sealing device (37);

the valve cover (35) mainly comprises a sealing valve plate (7), a reinforcing valve plate (8), a ring rib (9), a longitudinal rib (10), a shaft sleeve (11) and a valve plate fastener (12); a shaft sleeve (11) is arranged at a central opening of the sealing valve plate (7), and the reinforcing valve plate (8) is welded on the outer side of the shaft sleeve (11); the annular ribs (9) and the longitudinal ribs (10) are welded on the surface of the reinforced valve plate (8); the sealing valve plate (7) and the reinforcing valve plate (8) are fixedly connected through a valve plate fastener (12); a labyrinth seal (34) is arranged between the valve cover (35) and the valve seat;

the poppet valve rod mainly comprises a valve rod (17), a valve rod flange (18), a head-dismounting flange (19), a valve rod flange fastener (20) and a heat insulation block (21); the lift valve shaft head mainly comprises a shaft head (13), a shaft head gasket (14), a shaft head nut (15) and a shaft head fastening nut (16); the valve rod (17) is connected with the shaft head (13) in a plug welding way; the valve rod flange (18) is welded at the end part of the valve rod (17), and the heat insulation block (21), the valve rod flange (18) and the head dismounting flange (19) are fixedly connected through a valve rod flange fastener (20); the valve cover (35) penetrates through the shaft head (13) and is fixed through a shaft head gasket (14), a shaft head nut (15) and a shaft head fastening nut (16);

the centering device (36) mainly comprises a centering piece base (1), a centering piece bracket (2), a centering piece (3), a centering piece pressing plate (4), a first pressing plate fastening piece (5) and a bottom plate fastening piece (6); the centering piece base (1) is fixedly connected with the centering piece bracket (2) through a bottom plate fastener (6); the centering piece (3) is arranged on the centering piece base (1), the centering piece pressing plate (4) is arranged above the centering piece (3), and the centering piece base (1), the centering piece (3) and the centering piece pressing plate (4) are fixedly connected through a first pressing plate fastener (5); the valve rod (17) penetrates through the centering piece (3);

the sealing device (37) mainly comprises a second pressure plate fastener (22), a pressure plate (23), a filler flange (24), a seat plate flange (25), a seat mortar body (26), a sealing element (27), a sealing plate flange (28), a sealing plate fastener (29), a sleeve (30) and a sleeve reinforcement (31); the upper end and the lower end of the sleeve (30) are respectively provided with a seat plate flange (25) and a sealing plate flange (28); seat mortar bodies (26) are respectively welded on the seat plate flange (25) and the seal plate flange (28), and sealing elements (27) are arranged inside the seat mortar bodies (26); the packing flange (24) is formed by splicing two semicircular annular flanges, the pressing plate (23) is positioned on the packing flange (24), the pressing plate (23), the seat plate flange (25) and the seat mortar body (26) are fixedly connected through a second pressing plate fastener (22), and the packing flange (24), the pressing plate (23), the closing plate flange (28) and the seat mortar body (26) are fixedly connected through the second pressing plate fastener (22); the sealing plate flange (28), the sleeve (30) and the sleeve reinforcement (31) are welded and fixed with each other; the sealing plate flange (28) is fixedly connected with the inlet and outlet pipe flange of the lift valve through a sealing plate fastener (29).

2. The poppet valve apparatus for a regenerative incinerator according to claim 1, wherein: the sealing valve plate (7) is a round steel plate, and a through hole is formed in the center of the sealing valve plate.

3. The poppet valve apparatus for a regenerative incinerator according to claim 1, wherein: the centering piece (3) is three layers of PTFE shaft sleeves, and each layer of PTFE shaft sleeve is formed by splicing two semicircular rings.

4. The poppet valve apparatus for a regenerative incinerator according to claim 1, wherein: the sealing element (27) is a PTFE packing, and the inner diameter of the sealing element (27) is smaller than the diameter of the valve rod (17).

5. The poppet valve apparatus for a regenerative incinerator according to claim 1, wherein: the labyrinth seal (34) is concave high temperature resistant silica gel.

6. The poppet valve apparatus for a regenerative incinerator according to claim 1, wherein: a protective cover (32) is arranged on the outer side of the poppet valve rod, the protective cover (32) is located below the sealing plate flange (28), and an air cylinder (33) is arranged below the poppet valve rod.

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