CN218971895U

CN218971895U - Powder reversing valve

Info

Publication number: CN218971895U
Application number: CN202320092223.XU
Authority: CN
Inventors: 梁文慧; 高胜强; 王勇; 陶文斌; 范晓军
Original assignee: Hebei Huadian Shijiazhuang Yuhua Thermoelectricity Co ltd
Current assignee: Hebei Huadian Shijiazhuang Yuhua Thermoelectricity Co ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-05-05
Anticipated expiration: 2033-01-31

Abstract

The utility model discloses a powder reversing valve, which comprises a vertical feeding pipe, a herringbone outer shell, a U-shaped diversion reversing groove plate and a driving device, wherein the lower part of the herringbone outer shell is sleeved on the outer side of the upper part of the feeding pipe, the U-shaped diversion reversing groove plate is rotatably connected in the outer shell, and the driving device is fixedly arranged on the outer shell and used for driving the diversion reversing groove plate to rotate; the feeding pipe is fixedly connected with the outer shell, the lower part of the feeding pipe is positioned in the diversion and reversing groove plate, the lower part of the outer shell is respectively provided with a first discharging pipe and a second discharging pipe, and the diversion and reversing groove plate has two working positions. The diversion reversing groove plate is U-shaped, so that the strength is higher, and the diversion reversing groove plate is not easy to deform even if worn. Meanwhile, powder entering the diversion and reversing groove plate only flows along the diversion and reversing groove plate and cannot leak from two sides of the diversion and reversing groove plate, so that the powder cannot leak from between the diversion and reversing groove plate and the outer shell.

Description

Powder reversing valve

Technical Field

The utility model relates to the technical field of pulverized coal conveying equipment of power plants, in particular to a powder reversing valve.

Background

The pulverized coal of a power plant is often required to be switched between two different paths during conveying, and a reversing valve is required to be used. The interior of a common reversing valve is a turning plate structure, so that the sealing effect is poor. Meanwhile, as the turning plate is in a flat plate shape, the turning plate can be worn after long-term use, so that the turning plate is thinned to reduce the strength, and finally the turning plate is deformed due to the impact during pulverized coal conveying, so that the turning plate is not switched in place, the pulverized coal is seriously leaked, and the pulverized coal conveying efficiency is reduced.

The patent with publication number CN202746664U discloses a powder conveying two-position three-way turning plate type reversing valve, the cross section of a three-way valve body is a U-shaped cross section, a valve cover is arranged on the three-way valve body, a valve body channel is arranged on the three-way valve body, turning plate shafts are arranged on the inner side walls of the first outlet channel and the second outlet channel in a penetrating mode, the turning plate shafts are arranged on shaft sleeves in the three-way valve in a penetrating mode, the turning plate shafts are arranged on shaft sleeves of the valve cover in a penetrating mode, a seat plate is sleeved at the left end of the turning plate shaft, an electric head and an electric piece are fixedly arranged on the seat plate, and turning plate rectangles are arranged on the turning plates. The reversing is realized through turning the turning plate, so that the turning plate becomes thinner due to abrasion after long-term use, and then is deformed, so that the turning plate is deformed, the turning plate is not switched in place, the pulverized coal is seriously leaked, and the pulverized coal conveying efficiency is reduced. The above technical problems are also present in a flap-type reversing valve for conveying powder and granules, as disclosed in the publication CN 214002946U.

Disclosure of Invention

The utility model aims to solve the technical problem of improving a powder reversing valve, which is used for solving the problems of incomplete switching and serious internal leakage of pulverized coal caused by deformation of a turning plate after long-term use of the conventional pulverized coal reversing valve.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a powder reversing valve comprises a vertical feeding pipe, a herringbone outer shell, a U-shaped diversion and reversing groove plate and a driving device, wherein the lower part of the herringbone outer shell is sleeved on the outer side of the upper part of the feeding pipe, the U-shaped diversion and reversing groove plate is rotatably connected in the outer shell, and the driving device is fixedly arranged on the outer shell and used for driving the diversion and reversing groove plate to rotate; the feeding pipe is fixedly connected with the outer shell, the lower part of the feeding pipe is arranged in the diversion and reversing groove plate, the lower part of the outer shell is provided with a first discharging pipe and a second discharging pipe respectively, the diversion and reversing groove plate is provided with two working positions, when the diversion and reversing groove plate rotates to one working position, the lower end of the diversion and reversing groove plate faces the first discharging pipe, and when the diversion and reversing groove plate rotates to the other working position, the lower end of the diversion and reversing groove plate faces the second discharging pipe.

Further, two oblique angles are symmetrically arranged at the bottom of the feeding pipe, the two oblique angles form a V shape, and when the diversion plate reversing groove plate is positioned at the working position, the bottom surface of the inner side of the diversion plate reversing groove plate is propped against the corresponding oblique angles.

Further, a vertical separation plate is fixedly arranged between the first discharging pipe and the second discharging pipe, and when the diversion and reversing groove plate is positioned at the working position, the bottom surface of the diversion and reversing groove plate is propped against the top of the separation plate.

Further, the two sides of the diversion reversing groove plate are respectively and vertically fixedly provided with a first shaft and a second shaft, the first shaft and the second shaft are positioned on the same axis, the first shaft and the second shaft are respectively and rotatably connected with one side corresponding to the outer shell, and the driving device is in transmission connection with the second shaft.

Further, the connecting frame is fixedly arranged on the outer side of the shell body, the driving device is an electric head fixedly arranged on the connecting frame, and an output shaft of the electric head is in transmission connection with the second shaft.

Further, the second shaft penetrates through the corresponding hole in the outer shell, a second end cover is fixedly arranged on the outer shell at the position where the hole is located, the second end cover is arranged on the outer side of the outer shell, the second shaft is rotationally connected with the second end cover, and the second end cover is in sealing fit with the second shaft.

Further, the first discharging pipe and/or the second discharging pipe are/is provided with a checking hole, the checking hole is provided with a cover plate, and the checking hole is in sealing fit with the cover plate.

Further, the outer end of the first shaft is rotatably connected with a first end cover, and the first end cover is fixedly connected to the outer shell.

Further, the first end cover is connected with an adjusting screw which is propped against the outer end of the first shaft through a thread.

The utility model has the positive effects that:

1. the utility model is provided with a feed pipe, an outer shell and a diversion and reversing groove plate rotationally connected with the outer shell, and when the diversion and reversing groove plate is switched between two working positions, pulverized coal entering the feed pipe is respectively led to a first discharge pipe and a second discharge pipe at the lower part of the outer shell, so that reversing is realized. The diversion reversing groove plate is U-shaped, so that the strength is higher, and the diversion reversing groove plate is not easy to deform even if worn. Meanwhile, the coal powder entering the diversion and reversing groove plate only flows along the diversion and reversing groove plate and cannot leak from the two sides of the diversion and reversing groove plate, so that the coal powder cannot leak from between the diversion and reversing groove plate and the outer shell.

2. The bottom of the feeding pipe is symmetrically cut with two oblique angles, and when the diversion and reversing groove plate is positioned at the working position, the bottom surface of the inner side of the diversion and reversing groove plate is propped against the corresponding oblique angles. Therefore, when the diversion and reversing groove plate reaches the working position, the diversion and reversing groove plate is tightly and reliably sealed with the bottom of the feeding pipe.

3. A vertical rectangular separation plate is welded between the first discharging pipe 1 and the second discharging pipe 12, and when the diversion reversing groove plate is positioned at the working position, the first discharging pipe and the second discharging pipe are separated, so that pulverized coal is prevented from flowing between the first discharging pipe and the second discharging pipe.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view of the portion A-A of FIG. 1;

FIG. 3 is an enlarged view of a portion I of FIG. 2;

FIG. 4 is a schematic view of the present utility model in one of its operative positions;

in the figure:

1. a first discharge pipe; 2. a viewing aperture; 3. a handle; 4. a short pipe; 5. an outer housing; 6. a feed pipe; 7. a cover plate; 8. a flange; 9. bevel angle; 10. diversion reversing groove plates; 11. a partition plate; 12. a second discharge pipe; 13. a first end cap; 14. a second end cap; 15. an electric head; 16. a connecting frame; 17. a second shaft; 18. a first shaft; 19. adjusting a screw; 20. a gland; 21. graphite sealing packing.

Detailed Description

Example 1

As shown in fig. 1 and 2, the powder reversing valve comprises a vertical feeding pipe 6, a herringbone outer shell 5, a U-shaped flow guiding reversing groove plate 10 and a driving device, wherein the lower part of the herringbone outer shell 5 is sleeved on the outer side of the upper part of the feeding pipe 6, the U-shaped flow guiding reversing groove plate 10 is rotatably connected in the outer shell 5, and the driving device is fixedly arranged on the outer shell 5 and used for driving the flow guiding reversing groove plate 10 to rotate. The cross sections of the upper parts of the feeding pipe 6 and the outer shell are rectangular, the feeding pipe 6 is welded with the outer shell 5, the upper part of the feeding pipe 6 is bell-mouthed, the top of the feeding pipe 6 is welded with a rectangular flange 8, and both sides of the diversion and reversing groove plate 10 are in clearance fit with the outer shell 5.

The lower part of the feeding pipe 6 is positioned in the diversion and reversing trough plate 10, the lower part of the outer shell 5 is provided with a first discharging pipe 1 and a second discharging pipe 12 respectively, the first discharging pipe 1 and the second discharging pipe 12 are symmetrically arranged, and the cross sections of the first discharging pipe 1 and the second discharging pipe 12 are rectangular.

The deflector ledge 10 has two operating positions, one of which is shown in fig. 4. When the diversion and reversing groove plate 10 rotates to the working position, the lower right corner of the feeding pipe 6 is propped against the inner side of the diversion and reversing groove plate 10, and the diversion and reversing groove plate 10 is inclined from left to right, so that the lower end of the diversion and reversing groove plate 10 faces the first discharging pipe 1, and therefore coal dust enters the diversion and reversing groove plate 10 from the feeding pipe 6 under the action of gravity and is guided to the first discharging pipe 1 to flow out under the action of the diversion and reversing groove plate 10.

Similarly, when the diversion and reversing chute board 10 rotates to another working position, the left lower corner of the feeding pipe 6 is propped against the inner side of the diversion and reversing chute board 10, the diversion and reversing chute board 10 is inclined from top left to bottom right, and coal dust enters the diversion and reversing chute board 10 from the feeding pipe 6 and is guided to the first discharging pipe 1 to flow out of the diversion and reversing chute board 10 towards the second discharging pipe 12 under the action of the diversion and reversing chute board 10.

As shown in fig. 2 and 3, the two sides of the diversion and reversing groove plate 10 are respectively welded with a first shaft 18 and a second shaft 17 vertically, the first shaft 18 and the second shaft 17 are positioned on the same axis, the first shaft 18 and the second shaft 17 are respectively connected with one side of the outer shell 5 in a rotating way, and the driving device is connected with the second shaft 17 in a transmission way.

The outside of the outer shell 5 is fixedly provided with a connecting frame 16 through a screw, the driving device is an electric head 15 fixedly arranged on the connecting frame 16 through a screw, and an output shaft of the electric head 15 is in transmission connection with a second shaft 17 through a coupling.

The second shaft 17 penetrates through corresponding holes in the outer shell 5, a second end cover 14 is fixedly arranged at the position of each hole in the outer shell 5 through a screw, the second end cover 14 is arranged outside the outer shell 5, the second shaft 17 is rotationally connected with the second end cover 14, a graphite sealing packing 21 wound on the second shaft 17 is arranged in the second end cover 14, and the second shaft 17 and the second end cover 14 are in sealing fit through the graphite sealing packing 21. The outer end of the second end cover 14 is connected with a gland 20 through a screw, and the gland 20 is pressed on a graphite sealing packing 21. By adjusting the screw on the second end cap 14, the pressing force applied to the graphite seal packing 21 can be adjusted, so that the pressing amount of the graphite seal packing 21 is adjusted, the friction force between the second shaft 17 and the graphite seal packing 21 is reduced as much as possible while the rotation of the second shaft 17 is ensured, and the abrasion of the graphite seal packing 21 can be compensated.

The diversion and reversing groove plate 10 is switched between two working positions under the drive of the electric head 15, so that pulverized coal flowing into the feeding pipe 6 is guided to the first discharging pipe 1 and the second discharging pipe 12, and reversing is realized. The U-shaped diversion and reversing groove plate 10 has higher strength and is not easy to deform even if worn. Meanwhile, the coal dust entering the diversion and reversing groove plate 10 cannot leak from the two sides of the diversion and reversing groove plate 10, so that the coal dust cannot leak from between the diversion and reversing groove plate 10 and the outer shell 5.

Example 2

As shown in fig. 1, 2 and 4, the present embodiment is different from embodiment 1 in that:

the bottom of the feeding pipe 6 is symmetrically cut with two bevel angles 9, the two bevel angles 9 form a V shape, and when the diversion and reversing groove plate 10 is positioned at the working position, the bottom surface of the inner side of the diversion and reversing groove plate 10 is propped against the corresponding bevel angle 9.

After the oblique angle 9 is arranged, when the diversion and reversing groove plate 10 reaches the working position, the diversion and reversing groove plate 10 is tightly and reliably sealed with the bottom of the feeding pipe 6.

A vertical rectangular separation plate 11 is welded between the first discharge pipe 1 and the second discharge pipe 12, and when the diversion and reversing groove plate 10 is positioned at the working position, the bottom surface of the diversion and reversing groove plate 10 abuts against the top of the separation plate 11.

After the separation plate 11 is arranged, when the diversion and reversing groove plate 10 is positioned at the working position, the first discharging pipe 1 and the second discharging pipe 12 are separated, and coal dust is prevented from flowing between the first discharging pipe 1 and the second discharging pipe 12. To ensure tightness, wool felts may be provided on the bottom and both sides of the flow-guiding and reversing groove plate 10.

Example 3

This embodiment differs from embodiment 2 in that:

the first discharging pipe 1 and/or the second discharging pipe 12 are/is provided with a checking hole 2, a short pipe 4 is welded on the checking hole 2, a connecting flange is welded at the outer end of the short pipe 4, a cover plate 7 is connected to the connecting flange through a screw, and a sealing gasket is arranged between the cover plate 7 and the connecting flange, so that the position of the diversion and reversing groove plate 10 is conveniently checked and the condition inside the outer shell 5 is checked.

The outer end of the first shaft 18 is rotatably connected with a first end cover 13, and the first end cover 13 is fixedly connected in a corresponding hole on the outer shell 5 through a screw. The first end cover 13 is connected with an adjusting screw 19 which is propped against the outer end of the first shaft 18 through a thread. The axial position of the first shaft 18 can be adjusted by screwing the adjusting screw 19, so that the position of the diversion and reversing groove plate 10 can be adjusted, and friction between the diversion and reversing groove plate 10 and the outer shell 5 is prevented.

The foregoing description of the embodiments of the present utility model has been presented only to illustrate the technical spirit and features of the present utility model, and it is intended to enable those skilled in the art to understand the present utility model and to implement it, but not to limit the scope of the present utility model only by the present embodiments, i.e. equivalent changes or modifications to the spirit of the present utility model disclosed herein, and it is intended for those skilled in the art to make local improvements in the system and changes, variations between subsystems, etc. within the scope of the present utility model without departing from the structure of the present utility model. At present, the technical scheme of the application has been subjected to pilot-scale experiments, namely small-scale experiments of products before large-scale mass production; after the pilot test is completed, the use investigation of the user is performed in a small range, and the investigation result shows that the user satisfaction is higher; now, the industrialization of the formal production of the product is prepared, including the early warning investigation of intellectual property risks.

Claims

1. The powder reversing valve is characterized by comprising a vertical feeding pipe (6), a herringbone outer shell (5) with the lower part sleeved on the outer side of the upper part of the feeding pipe (6), a U-shaped diversion reversing groove plate (10) rotationally connected in the outer shell (5) and a driving device fixedly arranged on the outer shell (5) and used for driving the diversion reversing groove plate (10) to rotate; the utility model provides a feeding pipe, including casing (5) and casing, casing (6), feeding pipe (6) lower part is located in water conservancy diversion switching-over frid (10), casing (5) lower part is first discharging pipe (1) and second discharging pipe (12) respectively, water conservancy diversion switching-over frid (10) have two working positions, when water conservancy diversion switching-over frid (10) rotate one of them working position, water conservancy diversion switching-over frid (10) lower extreme orientation first discharging pipe (1), and when water conservancy diversion switching-over frid (10) rotate another working position, water conservancy diversion switching-over frid (10) lower extreme orientation second discharging pipe (12).

2. A powder diverter valve as claimed in claim 1, characterized in that the bottom of the feed pipe (6) is symmetrically provided with two bevels (9), the two bevels (9) forming a V-shape, and when the deflector diverter plate (10) is in the working position, the bottom surface of the inner side of the deflector diverter plate (10) abuts against the corresponding bevels (9).

3. A powder diverter valve as claimed in claim 1, characterized in that a vertical separating plate (11) is fixedly arranged between the first discharge pipe (1) and the second discharge pipe (12), and when the diversion diverter plate (10) is in the working position, the bottom surface of the diversion diverter plate (10) abuts against the top of the separating plate (11).

4. A powder reversing valve according to claim 1, wherein a first shaft (18) and a second shaft (17) are respectively and vertically fixed on two sides of the diversion reversing groove plate (10), the first shaft (18) and the second shaft (17) are located on the same axis, the first shaft (18) and the second shaft (17) are respectively and rotatably connected with one side corresponding to the outer shell (5), and the driving device is in transmission connection with the second shaft (17).

5. A powder diverter valve according to claim 4, characterized in that the outer side of the outer housing (5) is fixedly provided with a connecting frame (16), the driving means is an electric head (15) fixedly arranged on the connecting frame (16), and the output shaft of the electric head (15) is in transmission connection with a second shaft (17).

6. A powder reversing valve according to claim 5, wherein the second shaft (17) is arranged in a corresponding hole in the outer casing (5) in a penetrating manner, a second end cover (14) is fixedly arranged on the outer casing (5) at the position of the hole, the second end cover (14) is arranged outside the outer casing (5), the second shaft (17) is rotationally connected with the second end cover (14), and the second end cover (14) is in sealing fit with the second shaft (17).

7. A powder diverter valve as claimed in claim 1, characterized in that the first discharge pipe (1) and/or the second discharge pipe (12) are/is provided with a view port (2), the view port (2) is provided with a cover plate (7), and the view port (2) is in sealing fit with the cover plate (7).

8. A powder diverter valve as claimed in claim 4, characterized in that the outer end of the first shaft (18) is rotatably connected with a first end cap (13), the first end cap (13) being fixedly connected to the outer housing (5).

9. A powder diverter valve as claimed in claim 8, characterized in that the first end cap (13) is threaded through with an adjustment screw (19) that abuts the outer end of the first shaft (18).