Knife-shaped gate valve with wear-resistant lining
By surfacing the alloy on the inner liner of the marine hydraulic knife type gate valve and welding it on the inner wall of the valve body, the problem of the non-wear resistance of the inner liner in the prior art is solved, and the service life and wear resistance of the valve are significantly improved.
Patent Information
- Application Number
- CN202422025342.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-20
AI Technical Summary
The lining material of existing marine hydraulic knife type gate valves is not wear-resistant, resulting in a high frequency of replacement during long-term use and cannot meet actual needs.
The inner lined pipe is welded to the inner wall of the valve body flow pipe by welding, and a layer of alloy is surfacing on the inner lined pipe, thereby improving the wear and corrosion resistance of the inner lined pipe.
Through surfacing technology, the alloy is surfacing on the lined pipes has been significantly improved, the service life of the valve is reduced, and the replacement frequency is reduced, and the wear and corrosion resistance is met.
Smart Images
Figure CN222910811U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to a knife gate valve with wear-resistant lining. Background Art
[0002] The knife gate valve has a knife-shaped inclined cut at the bottom of the flat valve plate and has the function of cutting off the medium, so that the valve closing is not blocked by the medium. It is mainly used as a valve inside the pipeline for liquid flow to interrupt the use of liquid, and has a wide range of applications.
[0003] At present, the lining material of the marine hydraulic knife gate valve on the market is often stainless steel, and its wear resistance cannot meet the long-term work. The replacement frequency is relatively high. Summary of the Utility Model
[0004] The purpose of the utility model is to propose a knife gate valve with wear-resistant lining for the problems existing in the background art.
[0005] The technical solution of the utility model, a knife gate valve with wear-resistant lining, includes:
[0006] The valve body flow-through pipeline, and both ends of the valve body flow-through pipeline are connected with first connecting flanges;
[0007] The valve body housing, the valve body housing is communicated with the inside of the valve body flow-through pipeline, a valve plate is slidably arranged inside the valve body housing, and a hydraulic cylinder for driving the valve plate to move is installed on the valve body housing;
[0008] Two valve body protection mechanisms, the two valve body protection mechanisms are symmetrically arranged at both ends of the valve body flow-through pipeline, and the valve body protection mechanism includes a lining pipe and a second connecting flange arranged at the outer end of the lining pipe;
[0009] Two sealing mechanisms, the two sealing mechanisms are respectively arranged inside the lining pipes on both sides, the sealing mechanism includes a sealing rubber ring and an external thread ring a, the sealing rubber ring is installed on the external thread ring a, internal threads are arranged inside the lining pipes, and the lining pipes are threadedly connected with the external thread ring a through the internal threads, and a cross is arranged inside the external thread ring a.
[0010] Preferably, an arc-shaped notch for the valve plate to penetrate is formed on the lining pipe.
[0011] Preferably, an external thread ring b is threadedly connected inside one of the lining pipes, a filter screen is installed inside the external thread ring b, and a cross is also installed inside the external thread ring b.
[0012] Preferably, a chamfer is arranged on one side of the sealing rubber ring away from the external thread ring a.
[0013] Preferably, the lining pipe and the valve body flow-through pipeline are in clearance fit.
[0014] Preferably, after the two valve body protection mechanisms are respectively installed at both ends of the valve body flow pipeline, the ends of the inner lining pipes on both sides are in contact with each other.
[0015] Preferably, liquid level sensors are arranged on the inner sides of the two valve body protection mechanisms, and a controller is installed on the valve body housing.
[0016] Compared with the prior art, the utility model has the following beneficial technical effects: by welding the two inner lining pipes to the inner wall of the valve body flow pipeline in a welding manner and welding the contact parts of the two inner lining pipes, the inner wall of the valve body flow channel can be protected. In this technical solution, an alloy is surfacing-welded on the inner lining pipe to achieve the effects of wear resistance and corrosion resistance, thereby greatly improving the service life of the valve and reducing the replacement frequency of the valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 and Figure 2 are all structural schematic diagrams of the utility model.
[0018] Figure 3 is a cross-sectional view of the valve body flow channel and the valve body housing in the utility model.
[0019] Figure 4 is a structural schematic diagram of the sealing rubber ring, the external thread ring a and the cross.
[0020] Reference numerals: 1, valve body flow pipeline; 2, valve body housing; 3, inner lining pipe; 4, first connecting flange; 5, second connecting flange; 6, hydraulic cylinder; 7, valve plate; 8, filter screen; 9, sealing rubber ring; 10, external thread ring a; 11, internal thread; 12, external thread ring b; 13, cross. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] Embodiment 1
[0022] As Figures 1-4 shown, a knife gate valve with wear-resistant inner lining proposed in this embodiment includes a valve body flow pipeline 1, a valve body housing 2, two valve body protection mechanisms and two sealing mechanisms.
[0023] Both ends of the valve body flow pipeline 1 are connected with first connecting flanges 4; the valve body housing 2 is internally communicated with the valve body flow pipeline 1, a valve plate 7 is slidably arranged inside the valve body housing 2, and a hydraulic cylinder 6 for driving the valve plate 7 to move is installed on the valve body housing 2.
[0024] Two valve body protection mechanisms are symmetrically arranged at both ends of the valve body flow pipeline 1. The valve body protection mechanism includes a lining pipe 3 and a second connecting flange 5 provided at the outer end of the lining pipe 3. The lining pipe 3 is in clearance fit with the valve body flow pipeline 1. When the two valve body protection mechanisms are respectively installed at both ends of the valve body flow pipeline 1, the ends of the two lining pipes 3 are in contact. An arc-shaped notch is provided on the lining pipe 3 for the valve plate 7 to pass through. Such a setting enables the two lining pipes 3 to cover the inner wall of the entire valve body flow pipeline 1 after welding, thereby effectively protecting the inner wall of the valve body flow pipeline 1.
[0025] Two sealing mechanisms are respectively arranged inside the lining pipes 3 on both sides. The sealing mechanism includes a sealing rubber ring 9 and an external thread ring a10. The sealing rubber ring 9 is installed on the external thread ring a10. A chamfer is provided on the side of the sealing rubber ring 9 away from the external thread ring a10. Such a setting enables the valve plate 7 to be smoothly inserted between the two sealing rubber rings 9, reducing the damage to the periphery of the sealing rubber ring 9 by the valve plate 7. An internal thread 11 is provided on the inner side of the lining pipe 3. The lining pipe 3 is threadedly connected to the external thread ring a10 through the internal thread 11. A cross 13 is provided inside the external thread ring a10.
[0026] Insert the two lining pipes 3 into the inner ends of both sides of the valve body flow pipeline 1 respectively. At this time, the ends of the two lining pipes 3 are in contact. Then, weld the two lining pipes 3 to the inner wall of the valve body flow pipeline 1 by welding, and weld the contact parts of the two lining pipes 3, so as to protect the inner wall of the valve body flow channel. In this technical solution, an alloy layer is surfacing-welded on the lining pipe 3 by surfacing welding technology. The surfacing welding technology can use surface processing technologies such as plasma surfacing welding, laser surfacing welding, and powder spraying to achieve the effect of wear resistance and corrosion resistance, thereby greatly improving the service life of the valve and reducing the replacement frequency of the valve.
[0027] Embodiment 2
[0028] As Figures 1-4 shown, a knife gate valve with wear-resistant lining proposed in this embodiment includes a valve body flow pipeline 1, a valve body housing 2, two valve body protection mechanisms, and two sealing mechanisms.
[0029] First connecting flanges 4 are connected to both ends of the valve body flow pipeline 1. The valve body housing 2 is in internal communication with the valve body flow pipeline 1. A valve plate 7 is slidably arranged inside the valve body housing 2. A hydraulic cylinder 6 for driving the valve plate 7 to move is installed on the valve body housing 2.
[0030] Two valve body protection mechanisms are symmetrically arranged at both ends of the valve body flow pipeline 1. The valve body protection mechanism includes a lining pipe 3 and a second connecting flange 5 arranged at the outer end of the lining pipe 3. The lining pipe 3 is in clearance fit with the valve body flow pipeline 1. After the two valve body protection mechanisms are respectively installed at both ends of the valve body flow pipeline 1, the ends of the two lining pipes 3 are in contact. An arc-shaped notch is formed in the lining pipe 3 for the valve plate 7 to penetrate through. With such a setting, the inner walls of the entire valve body flow pipeline 1 can be covered after the two lining pipes 3 are welded, so as to effectively protect the inner wall of the valve body flow pipeline 1.
[0031] Two sealing mechanisms are respectively arranged inside the lining pipes 3 on both sides. The sealing mechanism includes a sealing rubber ring 9 and an external thread ring a 10. The sealing rubber ring 9 is installed on the external thread ring a 10. A chamfer is arranged on the side of the sealing rubber ring 9 away from the external thread ring a 10. With such a setting, the valve plate 7 can be smoothly inserted between the two sealing rubber rings 9, reducing the damage to the periphery of the sealing rubber ring 9 by the valve plate 7. An internal thread 11 is arranged inside the lining pipe 3. The lining pipe 3 is threadedly connected to the external thread ring a 10 through the internal thread 11. A cross 13 is arranged inside the external thread ring a 10.
[0032] The lining pipe 3 on one side is threadedly connected to an external thread ring b 12. A filter screen 8 is installed inside the external thread ring b 12. A cross 13 is also installed inside the external thread ring b 12. By arranging the filter screen 8, large-particle impurities in the water entering the valve body flow pipeline 1 can be filtered to avoid affecting the opening and closing of the valve body, and at the same time, the sealing performance of the valve body is ensured. Driving the cross 13 to rotate can drive the external thread ring b 12 to rotate, and threadedly connect the external thread ring b 12 to the inner wall of the lining pipe 3, so that the filter screen 8 can be easily taken out from the inside of the lining pipe 3, thus facilitating the cleaning of the filter screen 8.
[0033] Liquid level sensors are arranged inside both valve body protection mechanisms. A controller is installed on the valve body housing 2. By arranging the two liquid level sensors, the water level heights at both ends of the valve body flow pipeline 1 can be respectively detected. When the water level height on one side is significantly higher than that on the other side, it indicates that the filter screen 8 arranged may be blocked. The liquid level sensor feeds back the signal to the controller, and the controller starts the alarm work.
[0034] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to this. Various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art to which the present invention pertains.
Claims
1. A knife-type gate valve with a wear-resistant lining, characterized in that: include: A valve body circulation pipeline (1), both ends of the valve body circulation pipeline (1) being connected to a first connection flange (4); A valve body shell (2), the valve body shell (2) is connected to the inside of the valve body flow pipe (1), a valve plate (7) is slidably provided on the inner side of the valve body shell (2), and a hydraulic cylinder (6) for driving the valve plate (7) to move is installed on the valve body shell (2); Two valve body protection mechanisms, the two valve body protection mechanisms are symmetrically arranged at two ends of the valve body circulation pipeline (1), the valve body protection mechanisms comprising an inner liner pipe (3) and a second connecting flange (5) arranged at the outer end of the inner liner pipe (3); Two sealing mechanisms are respectively arranged in the inner lining tube (3) on both sides, and the sealing mechanisms include a sealing rubber ring (9) and an external thread ring a (10). The sealing rubber ring (9) is installed on the external thread ring a (10). The inner side of the inner lining tube (3) is provided with an internal thread (11). The inner lining tube (3) is threadedly connected with the external thread ring a (10) through the internal thread (11), and the inner side of the external thread ring a (10) is provided with a cross (13).
2. A knife-type gate valve with a wear-resistant lining according to claim 1, characterized in that: The inner lining tube (3) is provided with an arc-shaped notch for the valve plate (7) to pass through.
3. A knife-type gate valve with a wear-resistant lining according to claim 1, characterized in that: The inner thread of the inner liner pipe (3) on one side is connected to an outer thread ring b (12), a filter screen (8) is installed on the inner side of the outer thread ring b (12), and a cross (13) is also installed on the inner side of the outer thread ring b (12).
4. A knife-type gate valve with a wear-resistant lining according to claim 1, characterized in that: A chamfer is provided on the side of the sealing rubber ring (9) away from the external thread ring a (10).
5. A knife-type gate valve with a wear-resistant lining according to claim 1, characterized in that: The inner lining pipe (3) and the valve body flow pipe (1) are clearance-matched.
6. A knife-type gate valve with a wear-resistant lining according to claim 1, characterized in that: When the two valve body protection mechanisms are respectively installed at the two ends of the valve body flow pipe (1), the ends of the inner lining pipes (3) on both sides are in contact with each other.
7. A knife-type gate valve with a wear-resistant lining according to claim 3, characterized in that: Liquid level sensors are arranged on the inner sides of the two valve body protection mechanisms, and a controller is installed on the valve body shell (2).