CN219366847U - Gate valve with purging device and pulverized coal weighing device - Google Patents

Abstract

The utility model discloses a gate valve with a purging device, which comprises a pushing piece, a gate, a valve body and a valve seat, wherein the gate is fixed at the end part of the pushing piece, a slide way is arranged on the valve seat, the gate and the valve seat are arranged in a sliding way, the valve seat is fixed with the valve body, the valve seat is communicated with a purging component, and the purging component stretches into the valve seat and is arranged towards the slide way. The utility model also discloses a coal powder weighing device which comprises a coal powder bin, a discharging pipe and a coal powder scale which are sequentially communicated, wherein a gate valve with a purging device is arranged at the joint of the coal powder bin and the discharging pipe, and a gate valve with a purging device is arranged at the joint of the discharging pipe and the coal powder scale. The utility model has the beneficial effects that the purging components are arranged at the valve seat, the coal dust in the slideway is periodically blown through the purging air tap, at least two purging components are arranged at two sides of the valve seat in each group, and the purging components are used for purging at a plurality of positions, so that the powder at the tail end of the valve body is more thoroughly treated, and dead angle positions are avoided.

Description

Gate valve with purging device and pulverized coal weighing device

Technical Field

The utility model relates to the technical field of gate valves, in particular to a gate valve with a purging device.

Background

DN series pneumatic gate valve is the supporting equipment of pulverized coal scale, is the supporting equipment of connecting pulverized coal scale and unloading pipe, and under the normal condition operating condition, the valve is normally open state, and the pulverized coal falls to the rotor scale by the pulverized coal storehouse, and the back is weighed and is delivered out the rotor scale through the Roots blower. When equipment is overhauled, the DN pneumatic gate valve is closed, so that coal dust is blocked, and the coal dust scale is maintained and overhauled. Because the time from normal operation to maintenance period is longer, DN series pneumatic gate valve is in open state for a long time, if the water content of coal dust is too large, the positions of the tail part of the valve head and the head part of the gate (namely the end part of the valve body) are rusted, and the coal dust is agglomerated. When the pulverized coal scale is overhauled, the flashboard needs to be closed, and the flashboard can not be closed due to corrosion and pulverized coal caking. In the prior art, only the tail part of the valve head is treated or the head part of the flashboard is treated singly, and the problem that the flashboard cannot be closed still cannot be solved.

Disclosure of Invention

The utility model aims to solve the problems, and designs a gate valve with a purging device. Including advancing piece, flashboard, valve body and disk seat, advance a fixed flashboard in tip, be provided with the slide on the disk seat, the flashboard with the disk seat slides and sets up, the disk seat is fixed with the valve body, be provided with the through-hole that is used for feeding and ejection of compact on the valve body, the intercommunication has the purge assembly on the disk seat, the purge assembly stretches into inside the disk seat and towards the slide sets up.

Further, the purge component is symmetrically provided with two groups along the upper part and the bottom of the valve seat, and each group of purge component is provided with at least two groups along the two sides of the valve seat.

Further, the purge assembly comprises a purge air tap and a main vent pipe, the purge air tap is fixed with the main vent pipe, and the end part of the main vent pipe faces the slideway.

Further, a plurality of purge air nozzles are communicated with one-way valves.

Further, the purge assembly may further include a snorkel that is in communication with the main snorkel and the snorkel is parallel to the main snorkel.

Further, the valve body has feed body and fixed plate, feed body and fixed plate fixed connection, feed body has roof, vertical portion and bellying, the roof vertical portion with bellying integrated into one piece, the bellying is followed the valve body outwards protrudes, the roof is fixed with the limiting plate, the roof with be fixed with the sealing block between the limiting plate, the flashboard remove to when the valve body tip with the sealing block contact each other simultaneously the flashboard tip with have the clearance between the bellying.

Further, a sealing assembly is arranged between the flashboard and the valve seat, the sealing assembly comprises sealing filler and a packing gland pressed on the sealing filler, the sealing filler is arranged at the joint of the flashboard and the valve seat, and a fixing bolt is connected between the valve seat and the packing gland in a threaded manner.

The pulverized coal weighing device comprises a pulverized coal bin, a discharging pipe and a pulverized coal scale which are sequentially communicated, wherein a sluice valve is arranged at the joint of the pulverized coal bin and the discharging pipe, a sluice valve is arranged at the joint of the discharging pipe and the pulverized coal scale, and the sluice valve is the sluice valve with the purging device.

The gate valve with the purging device and the pulverized coal weighing device with the gate valve manufactured by the technical scheme of the utility model have the beneficial effects that: the purging components are arranged at the valve seat, coal dust in the slide way is periodically blown through the purging air tap, at least two purging components are arranged at two sides of the valve seat, purging is carried out at a plurality of positions, powder treatment is more thorough at the tail end position of the valve body, and dead angle positions are avoided; the feeding body of the valve body is provided with the vertical part and the protruding part, the flashboard is in direct contact with the sealing block when moving to the end part of the valve body, a gap is reserved between the flashboard and the protruding part when sealing is realized, and the phenomenon that powder agglomeration occurs at the head part of the valve body to influence the reciprocating motion of the flashboard is avoided.

Drawings

FIG. 1 is a schematic view of the internal structure of a gate valve with a purge device according to the present utility model;

FIG. 2 is a front view of a gate valve with a purge device according to the present utility model;

FIG. 3 is an enlarged view of a portion of the utility model at reference A in FIG. 1;

FIG. 4 is a front view of the pulverized coal weighing device according to the present utility model;

in the figure, 1, a propelling piece; 2. a flashboard; 3. a valve body; 31. a feed body; 311. a top plate; 312. a vertical portion; 313. a boss; 314. a limiting plate; 315. a sealing block; 32. a fixing plate; 33. a through hole; 4. a valve seat; 5. a slideway; 6. a purge assembly; 61. purging the air tap; 62. a main vent pipe; 63. a ventilation pipe; 7. a seal assembly; 71. a packing gland; 72. sealing filler; 73. a fixing bolt; 8. a coal dust bin; 9. discharging pipes; 10. and (5) weighing pulverized coal.

Detailed Description

The utility model is specifically described below with reference to the accompanying drawings, and the gate valve with the purging device comprises a pushing member 1, a gate plate 2, a valve body 3 and a valve seat 4, wherein the gate plate 2 is fixed at the end part of the pushing member 1, a slide way 5 is arranged on the valve seat 4, the gate plate 2 and the valve seat 4 are arranged in a sliding manner, the valve seat 4 is fixedly provided with the valve body 3, a through hole 33 for feeding and discharging is arranged on the valve body 3, a purging component 6 is communicated with the valve seat 4, and the purging component 6 extends into the valve seat 4 and is arranged towards the slide way 5. The pushing member 1 may be alternatively a pushing cylinder, the pushing cylinder drives the shutter 2 to move along the slide way 5, the through hole 33 is divided into two relatively independent spaces by the shutter 2 when the shutter 2 moves to the inside of the through hole 33, the valve is closed, feeding is stopped, when the shutter 2 withdraws from the through hole 33, the through hole 33 is kept integrally communicated, the valve is opened, and the material passes through the through hole 33.

The purging components 6 are symmetrically arranged in two groups along the upper part and the bottom of the valve seat 4, and each group of purging components 6 is provided with at least two purging components along the two sides of the valve seat 4. The purging component 6 is symmetrically provided with two groups of powder materials which can blow the powder materials stored in the slide way 5 out of the slide way 5 as much as possible in the same purging process along the upper part and the lower part of the valve seat 4, so that the phenomenon that the flashboard 2 does not work smoothly when running in the slide way 5 is avoided. Each group of purging components 6 is provided with at least two on two sides of the valve seat 4, and purges at a plurality of positions, so that powder treatment on the tail end position of the valve body 3 is more thorough, and dead angle positions are avoided.

The purge assembly 6 comprises a purge air tap 61 and a main air pipe 62, the purge air tap 61 is fixedly provided with the main air pipe 62, and the end part of the main air pipe 62 is arranged towards the slideway 5. The purge air nozzles 61 are all communicated with one-way valves. The purge air nozzles 61 may be respectively connected to a plurality of check valves, or may be integrated into one check valve. Compressed air with the pressure regulated by the pressure regulating valve is respectively and circularly blown to four blowing points in a timing way through the one-way valve. And (3) respectively connecting the check valves corresponding to the 4 purging points into four channels of the pulse control device by utilizing a professional pulse control device controlled by programmable logic, adjusting pulse working time (preset 1S), adjusting pulse interval time (preset 2S) and pulse cycle time (preset 9999S). Every 2.77 hours in actual working condition, the purge component 6 sprays compressed air for 1S to each preset purge point at intervals of 2S respectively to the purge point so as to finish the cleaning work of the pulverized coal and ensure that the pulverized coal cannot agglomerate.

The purge assembly 6 further includes a ventilation pipe 63, the ventilation pipe 63 being in communication with the main ventilation pipe 62 and the ventilation pipe 63 being parallel to the main ventilation pipe 62. If the diameter of the main ventilation pipe 62 is designed to be a relatively large diameter, a relatively large pressure loss is likely to occur when compressed air is blown, and the main ventilation pipe 62 and the branch ventilation pipe 63 are used in parallel, so that the purge area for the chute 5 can be increased.

As shown in fig. 1, the valve body 3 has a feeding body 31 and a fixing plate 32, the feeding body 31 and the fixing plate 32 are fixedly connected, the feeding body 31 has a top plate 311, a vertical portion 312 and a protruding portion 313, the top plate 311, the vertical portion 312 and the protruding portion 313 are integrally formed, the protruding portion 313 protrudes outwards along the valve body 3, a limiting plate 314 is fixed on the top plate 311, a sealing block 315 is fixed between the top plate 311 and the limiting plate 314, and when the shutter 2 moves to the end of the valve body 3, the shutter 2 contacts with the sealing block 315, and a gap is formed between the end of the shutter 2 and the protruding portion 313. To the problem that the powder caking was piled up easily to valve body 3 head position, this scheme sets up valve body 3 as feed body 31 and fixed plate 32 fixed connection, feed body 31 has vertical portion 312 and bellying 313 simultaneously, flashboard 2 when closing, through the side and the sealing block 315 cooperation of flashboard 2, sealing block 315 is made by high density felt, form soft seal between sealing block 315 and the flashboard 2 like this, sealed effectual, have a clearance between flashboard 2 tip and the bellying 313, flashboard 2 can not directly contact each other with valve body 3, but leave the clearance between flashboard 2 and bellying 313, can effectively avoid the emergence of valve body 3 head card material condition like this.

As shown in fig. 3, a sealing assembly 7 is arranged between the gate plate 2 and the valve seat 4, the sealing assembly 7 comprises a sealing filler 72 and a packing gland 71 pressed on the sealing filler 72, the sealing filler 72 is arranged at the joint of the gate plate 2 and the valve seat 4, and a fixing bolt 73 is connected between the valve seat 4 and the packing gland 71 in a threaded manner. The packing filler 72 in this embodiment is a packing filler, and other fillers may be selected according to actual conditions.

As shown in fig. 4, the pulverized coal weighing device comprises a pulverized coal bin 8, a discharging pipe 9 and a pulverized coal scale 10 which are sequentially communicated, wherein a gate valve is arranged at the joint of the pulverized coal bin 8 and the discharging pipe 9, a gate valve is arranged at the joint of the discharging pipe 9 and the pulverized coal scale 10, and the gate valve is a gate valve with a purging device in the embodiment. The gate valve is arranged, so that powder accumulation and agglomeration at the head part of the valve body 3 and the valve seat 4 can be avoided.

The above technical solution only represents the preferred technical solution of the present utility model, and some changes that may be made by those skilled in the art to some parts of the technical solution represent the principles of the present utility model, and the technical solution falls within the scope of the present utility model.

Claims (7)

1. The gate valve with the purging device is characterized by comprising a pushing member (1), a gate plate (2), a valve body (3) and a valve seat (4), wherein the gate plate (2) is fixed at the end part of the pushing member (1), a slide way (5) is arranged on the valve seat (4), the gate plate (2) and the valve seat (4) are arranged in a sliding mode, the valve seat (4) is fixedly provided with the valve body (3), a through hole (33) for feeding and discharging is formed in the valve body (3), a purging component (6) is communicated with the valve seat (4), and the purging component (6) stretches into the valve seat (4) and faces the slide way (5);

valve body (3) have feeding body (31) and fixed plate (32), feeding body (31) and fixed plate (32) fixed connection, feeding body (31) have roof (311), vertical portion (312) and bellying (313), roof (311) vertical portion (312) with bellying (313) integrated into one piece, bellying (313) are followed valve body (3) outwards outstanding, roof (311) are fixed with limiting plate (314), roof (311) with be fixed with sealing block (315) between limiting plate (314), flashboard (2) move to when valve body (3) tip with sealing block (315) contact each other simultaneously flashboard (2) tip with have the clearance between bellying (313).

2. The gate valve with the purging device according to claim 1, characterized in that the purging components (6) are symmetrically arranged in two groups along the upper part and the bottom of the valve seat (4), and each purging component (6) is provided with at least two groups along two sides of the valve seat (4).

3. The gate valve with the purge device according to claim 2, wherein the purge assembly (6) comprises a purge air tap (61) and a main vent pipe (62), the purge air tap (61) is fixed with the main vent pipe (62), and an end of the main vent pipe (62) is arranged towards the slide way (5).

4. A gate valve with a purge device according to claim 3, wherein a plurality of purge air nozzles (61) are communicated with a check valve.

5. A gate valve with a purge device according to claim 3, characterized in that the purge assembly (6) further comprises a gas distribution pipe (63), the gas distribution pipe (63) being in communication with the main gas distribution pipe (62) and the gas distribution pipe (63) being parallel to the main gas distribution pipe (62).

6. The gate valve with the purging device according to claim 5, characterized in that a sealing assembly (7) is arranged between the gate (2) and the valve seat (4), the sealing assembly (7) comprises a sealing filler (72) and a packing gland (71) pressed on the sealing filler (72), the sealing filler (72) is arranged at the joint of the gate (2) and the valve seat (4), and a fixing bolt (73) is connected between the valve seat (4) and the packing gland (71) in a threaded manner.

7. The coal powder weighing device is characterized by comprising a coal powder bin (8), a discharging pipe (9) and a coal powder scale (10) which are sequentially communicated, wherein a gate valve is arranged at the joint of the coal powder bin (8) and the discharging pipe (9), a gate valve is arranged at the joint of the discharging pipe (9) and the coal powder scale (10), and the gate valve is provided with a purging device according to any one of claims 1-6.