CN200978134Y

CN200978134Y - Rotating feeding valve

Info

Publication number: CN200978134Y
Application number: CN 200620165029
Authority: CN
Inventors: 马铁兵; 杜爱祥
Original assignee: JIANGSU ZHISI MACHINERY MANUFACTURE CO Ltd
Current assignee: JIANGSU ZHISI MACHINERY MANUFACTURE CO Ltd
Priority date: 2006-12-11
Filing date: 2006-12-11
Publication date: 2007-11-21
Anticipated expiration: 2016-12-11

Abstract

This utility model provides a rotary feeding valve used to transport particle or powder materials, which comprises a valve shell and a rotary impeller set inside the valve shell, wherein a inlet slot and a outlet slot are provided on the top of the shell and at the bottom of the shell respectively; a concave groove is provided at the top end of each rotary blade of the rotary impeller, with a compaction spring and flexible components provided inside; the compaction spring reaches the bottom of the hard sealed sliding plate that locates inside the inserted narrow groove and enables radial micro adjustment, the sealed sliding plate is pressed to the concave arc surface of the of the shell internal by the spring set at the bottom of the sealed sliding plate. This utility model is of simple structure, and is able to realize effective seal without the problem that sealed effect is inclined to be invalid as the flexible sealing pad gets abraded, which reduces the times when the machine has to be stopped for changing sealing components.

Description

The swivel feeding valve

Technical field

The utility model relates to a kind of swivel feeding valve that is used for conveying granular or granular material.

Background technology

The swivel feeding valve is widely used in every profession and trades such as building materials, metallurgy, electric power, chemical industry.At present, be used for the swivel feeding valve of conveying granular or granular material, generally include valve casing and the rotary blade that is arranged in the valve casing chamber.According to the needs of different use occasions, rotary blade and valve casing cavity wall can be contactless, and be promptly gapped between impeller tip and the valve casing cavity wall face, or contact, be leak free, zero-lash between impeller tip and the valve casing cavity wall face promptly.For a kind of swivel feeding valve in back, requirement guarantees the sealing in feeding chamber in swivel feeding, usually the technological means that adopts has two kinds, and the one, be embedded in elastic sealing gasket at the end face groove of rotary blade, for example CN97221362.7 disclosed " flexible sealing feeding lock cyclone rotary valve ".But this method is poor because of the packing seal wear resisting property, and sealing property has just disappeared behind the operation certain hour, must the frequent shutdown maintenance change packing seal; The 2nd, install the rigidity scraping blade additional on the rotary blade top, simultaneously by improving working accuracy, realize the no gap of rotary blade and valve body as much as possible and, realize sealing than the contacting of less friction.This method is usually owing to processing and assembling reason, perhaps make between rigidity scraping blade and the valve casing cavity wall too closed contact, cause serious friction, make valve body produce abrasion, perhaps make between rigidity scraping blade and the valve casing cavity wall and the gap occurs, can not be applicable to the seal request height, especially there is big pressure differential occasion in feed inlet and outlet.

CN200520092296.0 discloses a kind of rotary seal feed valve, this feed valve is provided with two seal shoe glands in valve pocket inwall both sides, all there is a sleeve spring pinch device at the back side of each gland, sealing boots gland keeps no gap to contact with the end face of the rotary blade that rotates to its position under the effect of holddown spring, thereby realize the sealing of feed valve, also prevented block up, the get stuck appearance of problem of feed process.But obvious, the complex structure of this feed valve, assembly difficulty are also bigger.

The utility model content

Technical problem to be solved in the utility model provides a kind of simple in structure and can effectively realize leak free swivel feeding valve.

Swivel feeding valve described in the utility model, comprise valve casing and the rotary blade that is arranged in the valve casing chamber, the above and below of valve casing offers inlet point and discharging opening respectively, and the top of each rotating blade of rotary blade is equiped with the radially positiver sealing slide plate of micromatic setting.

The radially adjustment of described positiver sealing slide plate, can realize by following structure: the top dress at each rotating blade of rotary blade is offered groove, installing holddown spring or other elastic element in the groove, holddown spring props up the bottom of inserting the positiver sealing slide plate in the groove, the bottom of drop bar is by the pressing plate clamping that is fixed on the rotating blade top, drop bar withstands on the inner cancave cambered surface in valve casing chamber by being installed in the length of spring compressed of its bottom.

The positiver sealing slide plate of described radially micromatic setting also can be the spring tongue piece that directly is fixed on the integration on each rotating blade.

The top ends cross-sectional plane of described positiver sealing slide plate is circular arc, and its whole cross-sectional plane can be inverse-T-shaped, moves in order to guarantee that drop bar 31 is radially limited, on the drop bar both sides pressing plate is set, and with housing screw pressing plate is fixed on the rotating blade top.

In use, when causing positiver sealing plate heat expansion or shrinkage when the temperature difference occurring inside and outside the valve casing, can automatically regulating because be arranged on the spring or the elastic element of bottom, the drop bar of rotating blade top end can be kept in touch with the valve casing cavity wall, can the gap not occur or block stifled because of the temperature difference.Simultaneously; employing by rigid plate and be arranged on the spring of its bottom or the drop bar formed of other elastic element as sealing member; can further avoid the easy to wear and problem of easy loss of seal effect of elastic sealing gasket, reduce because of changing the shutdown maintenance number of times that sealing member must carry out.

The utility model is simple in structure, processes also corresponding reduction with assembly difficulty.

Description of drawings

Below in conjunction with accompanying drawing the utility model is described further:

Fig. 1 is the utility model structural representation;

Fig. 2 is the lateral plan of Fig. 1;

Fig. 3 is the partial enlarged drawing of A part among Fig. 2.

Specific embodiment

As Fig. 1, Fig. 2 and shown in Figure 3, the utility model comprises valve casing 1 and rotary blade 2, and its each rotating blade 3 tops are equiped with can radially sharply tuned closing plate 31; The cross section of drop bar 31 is inverse-T-shaped, and its top ends is circular arc.Offer elongated slot 32 in rotating blade 3 top ends, installing spring 33 or other elastic element in the groove 32, spring 33 props up the bottom of inserting the drop bar 31 in the groove 32; Move in order to guarantee that drop bar 31 is radially limited, on drop bar 31 both sides pressing plate 34 is set, and is fixed on rotating blade 31 tops with housing screw 35.Drop bar 32 withstands on the valve casing 1 inwall cancave cambered surface by spring 33 compressions, realizes sealing with this.

Claims

1, a kind of swivel feeding valve, comprise valve casing and the rotary blade that is arranged in the valve casing chamber, the above and below of valve casing offers inlet point and discharging opening respectively, it is characterized in that: the top of each rotating blade of described rotary blade is equiped with can radially sharply tuned positiver sealing slide plate.

2, swivel feeding valve as claimed in claim 1, it is characterized in that: in the groove that the top that described positiver sealing slide plate is inserted in each rotating blade of rotary blade is offered, installing spring or other elastic element in the groove, spring or elastic element prop up the bottom of positiver sealing slide plate; The bottom of positiver sealing slide plate is by the pressing plate clamping that is fixed on the rotating blade top; The positiver sealing slide plate withstands on the inner cancave cambered surface in valve casing chamber by being installed in the length of spring compressed of its bottom.

3, swivel feeding valve as claimed in claim 2 is characterized in that: the top ends cross-sectional plane of described positiver sealing slide plate is circular arc.

4, swivel feeding valve as claimed in claim 3 is characterized in that: the cross-sectional plane of described positiver sealing slide plate is inverse-T-shaped, and described pressing plate is arranged on the both sides of positiver sealing slide plate, and is fixed on the rotating blade top with housing screw.