CN219911816U - Special knife gate valve for hydraulic control powder - Google Patents
Special knife gate valve for hydraulic control powder Download PDFInfo
- Publication number
- CN219911816U CN219911816U CN202321274940.0U CN202321274940U CN219911816U CN 219911816 U CN219911816 U CN 219911816U CN 202321274940 U CN202321274940 U CN 202321274940U CN 219911816 U CN219911816 U CN 219911816U
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- China
- Prior art keywords
- steel plate
- flashboard
- diameter
- valve
- cavity
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- 239000000843 powder Substances 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 56
- 239000010959 steel Substances 0.000 claims abstract description 56
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000003466 welding Methods 0.000 claims abstract description 7
- 238000012856 packing Methods 0.000 claims description 13
- 239000000945 filler Substances 0.000 claims description 9
- 238000007790 scraping Methods 0.000 claims description 7
- 238000007517 polishing process Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 abstract description 3
- 230000008676 import Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Abstract
The utility model relates to a special knife-type gate valve for liquid control powder, which comprises a valve body, a gate plate, a valve rod, a support and a liquid control device, wherein the valve body is formed by welding two steel plates, the gate plate is dynamically sealed and inserted in a gate plate cavity between the two steel plates, flow passage holes of the two steel plates form a straight-through structure, no groove and dead angle are formed in a flow passage of the valve body, powder accumulation is avoided, and the gate valve has the advantages of small volume, low cost, reliable sealing performance and the like.
Description
Technical Field
The utility model belongs to the field of valves, and particularly relates to a knife gate valve. The utility model is suitable for powder medium pipelines.
Background
Knife gate valves are widely used in powder medium pipelines to control medium delivery. The knife gate valve is generally composed of a valve body, a gate plate, a valve rod and a transmission device, wherein the lower part of the gate plate is provided with a knife mouth shape, and when the gate plate is closed, particles or fiber media are cut off. However, when the powder medium is conveyed, the powder medium is easily accumulated in a groove at the bottom of the valve body to block the closing of the flashboard, so that the sealing performance is affected; moreover, the valve body of the common knife gate valve is generally formed by casting, and has larger volume and higher cost.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and provides a special knife gate valve for hydraulic control powder, which has the advantages of no medium accumulation groove in a valve body, small volume, low cost and reliable sealing performance.
The technical scheme for realizing the purpose of the utility model is as follows:
the utility model provides a special knife gate valve of liquid accuse powder, includes valve body, flashboard, valve rod, support, liquid accuse device, and the semicircle of flashboard lower part is knife-shaped structure, and upper portion centre and valve rod lower extreme fixed connection, valve rod upper end and liquid accuse device's piston rod are connected, and liquid accuse device passes through the support to be installed in the valve body upper end; the method is characterized in that: the valve body adopts a split structure and is formed by welding a left steel plate and a right steel plate, an inlet flange is welded on the inlet side plane of a flow passage hole of the left steel plate, an outlet flange is welded on the outlet side plane of a flow passage hole of the right steel plate, the diameter of the flow passage hole of the right steel plate is larger than that of the flow passage hole of the left steel plate, the flow passage hole of the inlet flange adopts a reduced diameter structure, the diameter of a reduced diameter end of the flow passage hole of the inlet flange is equal to that of the flow passage hole of the left steel plate, and the diameter of an expanded diameter end of the flow passage hole of the right steel plate; the opposite planes of the left steel plate and the right steel plate are manufactured by adopting a mirror polishing process, a flashboard cavity matched with a flashboard structure is manufactured between the left steel plate and the right steel plate, and planes on two sides of the flashboard cavity are manufactured by adopting the mirror polishing process, so that a sealing pair matched with each other is formed; the bottom of the right steel plate runner hole is provided with a wedging block, and the inclined surface of the wedging block is matched with the inclined surface of the lower part of the flashboard.
Preferably, a U-shaped sealing ring is arranged on the outer side of the flashboard cavity of the left steel plate and the right steel plate, packing filler is arranged in a stuffing box at the upper end of the flashboard cavity, and the packing filler and the U-shaped sealing ring are combined to form a closed sealing cavity.
Preferably, scraping plates are respectively arranged at the bottoms of the stuffing boxes at the two sides of the flashboard, and knife edges of the scraping plates are arranged towards the direction of the runner holes.
Preferably, a switching valve is provided between the rodless chamber and the rod-containing chamber of the hydraulic cylinder of the hydraulic control device.
Compared with the prior art, the utility model has the beneficial effects that: the valve body is formed by welding two steel plates, the flashboard is dynamically sealed and inserted in a flashboard cavity between the two steel plates, the runner holes of the two steel plates form a straight-through structure, no groove or dead angle exists in the runner of the valve body, powder accumulation is avoided, and the valve has the advantages of small volume, low cost, reliable sealing performance and the like.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
In the figure: 1U-shaped sealing ring, 2 valve body, 3 flashboard, 4 scraping plate, 5 packing filler, 6 packing clamp plate, 7 support, 8 valve rod, 9 hydraulic control device, 10 wedging piece.
Description of the embodiments
The special knife-type gate valve for liquid control powder shown in fig. 1 comprises a valve body 2, a gate plate 3, a valve rod 8, a bracket 7 and a liquid control device 9, wherein the semicircular arc at the lower part of the gate plate 3 is of a knife-type structure, the middle of the upper part is fixedly connected with the lower end of the valve rod 8, the upper end of the valve rod 8 is connected with a piston rod of the liquid control device 9, and the liquid control device 9 is arranged at the upper end of the valve body 2 through the bracket 7; the method is characterized in that: the valve body 2 adopts split type structure, comprises left steel sheet and right steel sheet through the welding, left steel sheet runner hole import side in-plane welding import flange, right steel sheet runner hole export side in-plane welding export flange, right steel sheet runner hole diameter is greater than left steel sheet runner hole diameter, makes valve body 2 runner dead angle not, and powder medium does not pile up through right steel sheet runner hole from left steel sheet runner hole, does not have the card when flashboard 3 is closed and hinders, and sealing performance is reliable. The diameter of the diameter-reduced end of the inlet flange runner hole is equal to that of the left steel plate runner hole, the diameter-reduced end is a bell mouth small-diameter end, the end face of the diameter-reduced end is welded with the left steel plate to form a blockage-free runner, the diameter of the diameter-expanded end is equal to that of the right steel plate runner hole, the diameter-expanded end is a bell mouth large-diameter end, and the end plane of the diameter-expanded end is connected with a powder pipeline; the opposite planes of the left steel plate and the right steel plate are manufactured by adopting a mirror polishing process, a flashboard cavity matched with the flashboard 3 in structure is manufactured between the left steel plate and the right steel plate, and the planes on the two sides of the flashboard 3 and the planes on the two sides of the flashboard cavity are manufactured by adopting the mirror polishing process to form a sealing pair matched with each other; the bottom of the right steel plate runner hole is provided with a wedging block 10, the inclined surface of the wedging block 10 is matched with the inclined surface of the lower part of the flashboard 3, and the wedging block is matched with the left steel plate in a sealing way when the flashboard 3 is closed.
The outer sides of flashboard cavities of the left steel plate and the right steel plate are provided with U-shaped sealing rings 1, packing fillers 5 are arranged in stuffing boxes at the upper ends of the flashboard cavities, the packing fillers 5 and the U-shaped sealing rings 1 are combined to form a closed sealing cavity, and the packing fillers 5 are arranged in the stuffing boxes by packing pressing plates 6.
The bottom of the stuffing box at two sides of the flashboard 3 is respectively provided with a scraping plate 4, the knife edge of the scraping plate 4 is arranged towards the direction of the runner hole, and powder adhered to the planes at two sides of the flashboard 3 is scraped when the flashboard 3 is opened, so that the safety of packing stuffing 5 is protected.
A switching valve is arranged between the rodless cavity and the rod cavity of the hydraulic cylinder of the hydraulic control device 9. When the valve is opened, the rod cavity is communicated with the oil filling pipe, and the rodless cavity is communicated with the oil return pipe; when the valve is closed, the rod cavity is communicated with the oil return pipe, and the rodless cavity is communicated with the oil injection pipe, so that the valve is closed and opened quickly.
Claims (4)
1. The utility model provides a special knife gate valve of liquid accuse powder, includes valve body (2), flashboard (3), valve rod (8), support (7), liquid accuse device (9), and the semicircle of flashboard (3) lower part is knife-shaped structure, and upper portion centre and valve rod (8) lower extreme fixed connection, valve rod (8) upper end and liquid accuse device (9) piston rod are connected, and liquid accuse device (9) are installed in valve body (2) upper end through support (7); the method is characterized in that: the valve body (2) adopts a split structure and is formed by welding a left steel plate and a right steel plate, an inlet flange is welded in the inlet side plane of a flow passage hole of the left steel plate, an outlet flange is welded in the outlet side plane of a flow passage hole of the right steel plate, and the diameter of the flow passage hole of the right steel plate is larger than that of the flow passage hole of the left steel plate; the diameter of the diameter-reduced end of the inlet flange runner hole is equal to that of the left steel plate runner hole, the diameter-reduced end is a bell-mouth small-diameter end, the end face of the diameter-reduced end is welded with the left steel plate, the diameter of the diameter-expanded end is equal to that of the right steel plate runner hole, the diameter-expanded end is a bell-mouth large-diameter end, and the end plane of the diameter-expanded end is connected with a powder pipeline; the opposite planes of the left steel plate and the right steel plate are manufactured by adopting a mirror polishing process, a flashboard cavity matched with the flashboard (3) structure is manufactured between the left steel plate and the right steel plate, and the planes on the two sides of the flashboard (3) and the planes on the two sides of the flashboard cavity are manufactured by adopting the mirror polishing process to form a sealing pair matched with each other; the bottom of the right steel plate runner hole is provided with a wedging block (10), and the inclined surface of the wedging block (10) is matched with the inclined surface of the lower part of the flashboard (3).
2. The hydraulically controlled powder dedicated knife gate valve of claim 1, characterized in that: the outer sides of flashboard cavities of the left steel plate and the right steel plate are provided with U-shaped sealing rings (1), packing fillers (5) are arranged in stuffing boxes at the upper ends of the flashboard cavities, the packing fillers (5) and the U-shaped sealing rings (1) are combined to form a closed sealing cavity, and the packing fillers (5) are arranged in the stuffing boxes by packing pressing plates (6).
3. The hydraulically controlled powder dedicated knife gate valve of claim 2, characterized in that: the bottoms of the stuffing boxes at the two sides of the flashboard (3) are respectively provided with a scraping plate (4), and the knife edge of the scraping plate (4) is arranged towards the direction of the runner hole.
4. A hydraulically controlled powder dedicated knife gate valve according to claim 1 or 2 or 3, characterized in that: a switching valve is arranged between a rodless cavity and a rod cavity of a hydraulic cylinder of the hydraulic control device (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321274940.0U CN219911816U (en) | 2023-05-24 | 2023-05-24 | Special knife gate valve for hydraulic control powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321274940.0U CN219911816U (en) | 2023-05-24 | 2023-05-24 | Special knife gate valve for hydraulic control powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219911816U true CN219911816U (en) | 2023-10-27 |
Family
ID=88440187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321274940.0U Active CN219911816U (en) | 2023-05-24 | 2023-05-24 | Special knife gate valve for hydraulic control powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219911816U (en) |
-
2023
- 2023-05-24 CN CN202321274940.0U patent/CN219911816U/en active Active
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