CN210661423U - Double-gate mud valve special for changing cutter of shield machine - Google Patents
Double-gate mud valve special for changing cutter of shield machine Download PDFInfo
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- CN210661423U CN210661423U CN201921277922.1U CN201921277922U CN210661423U CN 210661423 U CN210661423 U CN 210661423U CN 201921277922 U CN201921277922 U CN 201921277922U CN 210661423 U CN210661423 U CN 210661423U
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Abstract
The utility model relates to a special double-gate mud valve for changing cutters of a shield machine, which comprises a valve body, a gate plate, a valve rod, a bracket and a transmission mechanism; the valve body is characterized in that the valve body adopts a three-piece combined structure of a main valve body, a left valve body and a right valve body, the flashboard is provided with a first flashboard and a second flashboard, the valve rod is provided with a first valve rod and a second valve rod, the transmission mechanism is provided with a first transmission mechanism and a second transmission mechanism, and the first transmission mechanism and the second transmission mechanism are fixedly arranged on the support; a first valve seat is arranged between the main valve body and the left valve body, a second valve seat is arranged between the main valve body and the right valve body, the first valve seat and the first flashboard are matched with each other to form a first sealing pair, and the second valve seat and the second flashboard are matched with each other to form a second sealing pair. Each sealing pair is relative to an independent valve, and the sealing performance is good, the installation space of the product is small, and the installation cost is low.
Description
Technical Field
The utility model belongs to the valve field especially relates to a slide valve of transport mud. The utility model is suitable for a mud control valve when shield constructs machine and changes the cutter.
Background
The gate valve is a valve structure commonly used in a shield tunneling machine slurry pipeline system due to the characteristic of good circulation. The medium of the shield machine system is slurry, so that the requirement on the performance of the valve is high, particularly when the shield machine changes the cutter, zero leakage of the valve is required, and the influence of slurry leakage on cutter changing operation is prevented. At present, the gate valve structure used for replacing the shield machine cutter mainly comprises a single-gate plate flat gate valve, a double-gate plate flat gate valve and a wedge-shaped gate valve. Although slurry is not easy to accumulate in the valve cavity of the single-gate plate flat gate valve, the sealing performance of the single-gate plate flat gate valve cannot meet the zero leakage requirement; slurry is easily accumulated in valve cavity grooves of the double-gate plate flat gate valve and the wedge-shaped gate valve, so that the gate plates are difficult to close, and sealing leakage is caused. Therefore, two valves are generally required to be installed in the existing shield machine cutter system, and zero leakage of the valves is ensured when the cutters are replaced. This increases the installation and maintenance costs of the valve.
Disclosure of Invention
The utility model discloses to the problem that prior art exists, provide a sealing performance is good, installation space is little, and the special double-disc mud valve of cutter is changed to the shield structure machine that installation cost is low.
The technical proposal of the utility model comprises a valve body, a flashboard, a valve rod, a bracket and a transmission mechanism; the valve body is characterized in that the valve body adopts a three-piece combined structure of a main valve body, a left valve body and a right valve body, the flashboard is provided with a first flashboard and a second flashboard, the valve rod is provided with a first valve rod and a second valve rod, the transmission mechanism is provided with a first transmission mechanism and a second transmission mechanism, and the first transmission mechanism and the second transmission mechanism are fixedly arranged on the support; a first valve seat is arranged between the main valve body and the left valve body, a second valve seat is arranged between the main valve body and the right valve body, the first valve seat and the first flashboard are mutually matched to form a first sealing pair, the second valve seat and the second flashboard are mutually matched to form a second sealing pair, the upper end of the first flashboard is connected with the lower end of the first valve rod to form a hidden rod transmission structure, the upper end of the first valve rod is connected with a first transmission mechanism, and the upper end of the second valve rod is connected with a second transmission mechanism; the upper end of the second gate plate is connected with the lower end of the second valve rod to form a non-rising stem transmission structure, sealing fillers are respectively arranged between the planes on two sides of the first gate plate and the upper end of the main valve body and the upper end of the left valve body, and the sealing fillers are respectively arranged between the planes on two sides of the second gate plate and the upper ends of the main valve body and the right valve body.
Preferably, the first valve seat and the second valve seat adopt U-shaped sealing rings with built-in metal frameworks, and the first flashboard, the second flashboard and the U-shaped sealing rings are mutually matched by adopting V-shaped surfaces.
Preferably, the main valve body is provided with flushing ports on two sides.
Compared with the prior art, the utility model beneficial effect lie in: two independent sealing pairs are arranged in one valve body, each sealing pair is equivalent to an independent valve, zero leakage of the valve body outlet can be achieved by closing the two sealing pairs, the sealing performance is good, the product installation space is small, and the installation cost is low.
Drawings
Fig. 1 is a structural sectional view of the present invention.
Fig. 2 is a schematic view of the valve body channel direction of the present invention.
In the figure: the valve comprises a hexagon socket head cap screw 1, a second valve seat 2, a main valve body 3, a left valve body 4, a second flashboard 5, a right valve body 6, a sealing filler 7, a packing gland 8, a valve rod nut 9, a support 10, a second valve rod 11, a thrust ball bearing 12, a bearing gland 13, a double-headed screw 14, a nut 15, a switch display 16, a flushing port 17, a first valve seat 18, a first flashboard 19 and a first valve rod 20.
Detailed Description
The special double-gate mud valve for replacing the cutter of the shield tunneling machine shown in the figure 1 comprises a valve body, a gate plate, a valve rod, a support 10 and a transmission mechanism; the valve body is characterized in that the valve body is of a three-piece combined structure of a main valve body 3, a left valve body 4 and a right valve body 6, the left valve body 4 and the main valve body 3 and the right valve body 6 and the main valve body 3 are fixedly connected through a hexagon socket head cap screw 1, the gate plate is provided with a first gate plate 19 and a second gate plate 5, the first gate plate 19 and the second gate plate 5 are of a planar single-gate-plate structure, the valve rod is provided with a first valve rod 20 and a second valve rod 11, and the transmission mechanism is provided with a first transmission mechanism and a second transmission mechanism and is fixedly arranged on a support; a first valve seat 18 is arranged between the main valve body 3 and the left valve body 4, a second valve seat 2 is arranged between the main valve body 3 and the right valve body 6, the first valve seat 18 and the first flashboard 19 are mutually matched to form a first sealing pair, the second valve seat 2 and the second flashboard 5 are mutually matched to form a second sealing pair, the mutual matching surfaces of the main valve body 3, the left valve body 4 and the right valve body 6 are subjected to finish machining, the matching gap between the flashboard and the valve body is controlled, the inner cavity of the valve body has no dead angle, and the accumulation of media in the inner cavity of the valve body is avoided; the upper end of the first flashboard 19 is connected with the lower end of the first valve rod 20 to form a hidden rod transmission structure, the first flashboard 19 and the lower end of the first valve rod 20 are connected with each other through a valve rod nut 9, the opening height is reduced, the upper end of the first valve rod 20 is connected with a first transmission mechanism, the upper end of the second valve rod 11 is connected with a second transmission mechanism, thrust ball bearings 12 are respectively arranged between the first valve rod 20 and the support 10 and between the second valve rod 11 and the support 10, and the thrust ball bearings 12 are axially fixed on the support 10 through bearing glands; the upper end of the second gate plate 5 is connected with the lower end of the second valve rod 11 to form a hidden rod transmission structure, and the hidden rod transmission structure are connected through a valve rod nut 9 to reduce the opening height; sealing packing 7 is respectively arranged between the planes on two sides of the first flashboard 19 and the upper end of the main valve body 3 and the upper end of the left valve body 4, sealing packing 7 is respectively arranged between the planes on two sides of the second flashboard 5 and the upper ends of the main valve body 3 and the right valve body 6, and the sealing packing 7 is installed by adopting composite packing and is pressed by a packing gland 8 through a double-headed screw 14 and a nut 15.
The main valve body 4 is provided with flushing ports 17 on both sides. The flushing port 17 is communicated with a high-pressure water pipeline through a control valve, before a cutter of the shield machine is replaced, the second gate plate 5 is closed to cut off slurry in the pipeline, the control valve is opened to flush the valve cavity, and the slurry remained on the sealing surface of the first valve seat 18 is flushed away, so that the first gate plate 19 and the first valve seat 18 are closed without obstacles, and zero leakage of the first sealing pair is realized. The bracket is provided with a switch display 16 for displaying the on-off state of the valve, as shown in fig. 2.
Claims (3)
1. A special double-gate mud valve for replacing cutters of a shield machine comprises a valve body, a gate, a valve rod, a bracket (10) and a transmission mechanism; the valve is characterized in that the valve body adopts a three-piece combined structure of a main valve body (3), a left valve body (4) and a right valve body (6), the gate plate is provided with a first gate plate (19) and a second gate plate (5), the valve rod is provided with a first valve rod (20) and a second valve rod (11), the transmission mechanism is provided with a first transmission mechanism and a second transmission mechanism, and the first transmission mechanism and the second transmission mechanism are fixedly arranged on a support (10); a first valve seat (18) is arranged between the main valve body (3) and the left valve body (4), a second valve seat (2) is arranged between the main valve body (3) and the right valve body (6), the first valve seat (18) and the first flashboard (19) are matched with each other to form a first sealing pair, the second valve seat (2) and the second flashboard (5) are matched with each other to form a second sealing pair, the upper end of the first flashboard (19) is connected with the lower end of the first valve rod (20) to form a hidden rod transmission structure, the upper end of the first valve rod (20) is connected with a first transmission mechanism, and the upper end of the second valve rod (11) is connected with a second transmission mechanism; the upper end of the second flashboard (5) is connected with the lower end of the second valve rod (11) to form a non-rising stem transmission structure, sealing fillers (7) are respectively arranged between the planes on the two sides of the first flashboard (19) and the upper ends of the main valve body (3) and the left valve body (4), and the sealing fillers (7) are respectively arranged between the planes on the two sides of the second flashboard (5) and the upper ends of the main valve body (3) and the right valve body (6).
2. The special double-gate mud valve for the cutter replacement of the shield tunneling machine as claimed in claim 1, wherein the first valve seat (18) and the second valve seat (2) adopt U-shaped sealing rings with built-in metal frameworks, and the first gate plate (19) and the second gate plate (5) are matched with the U-shaped sealing rings through V-shaped surfaces.
3. The double-gate mud valve special for the cutter replacement of the shield tunneling machine as claimed in claim 1 or 2, wherein the main valve body (3) is provided with flushing ports (17) at two sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921277922.1U CN210661423U (en) | 2019-08-08 | 2019-08-08 | Double-gate mud valve special for changing cutter of shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921277922.1U CN210661423U (en) | 2019-08-08 | 2019-08-08 | Double-gate mud valve special for changing cutter of shield machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210661423U true CN210661423U (en) | 2020-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921277922.1U Active CN210661423U (en) | 2019-08-08 | 2019-08-08 | Double-gate mud valve special for changing cutter of shield machine |
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| Country | Link |
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| CN (1) | CN210661423U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594629A (en) * | 2020-06-23 | 2020-08-28 | 安徽铜都流体科技股份有限公司 | Double-cutter slurry gate valve for shield machine |
-
2019
- 2019-08-08 CN CN201921277922.1U patent/CN210661423U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594629A (en) * | 2020-06-23 | 2020-08-28 | 安徽铜都流体科技股份有限公司 | Double-cutter slurry gate valve for shield machine |
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