Knife gate valve structure
By incorporating a cleaning mechanism with a cleaning hole and scraper in the gate valve, the wear and deposition problems of the gate valve in the conveying process of slurry, coal washing, and ash slag are solved, achieving dual cleaning of the gate, extending the service life of the valve, and preventing media leakage.
Patent Information
- Application Number
- CN202422852071.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-21
AI Technical Summary
Knife gate valves suffer from severe wear and easy sedimentation in the processes of conveying slurry, coal washing, and ash, resulting in short valve service life, easy damage, affecting normal production operation, and potentially causing media leakage and environmental pollution.
A structure including a knife gate valve body, a gate plate, an actuator, and a cleaning mechanism is designed. By setting cleaning holes and scrapers on the gate plate, impurities are removed by spraying and scraping with cleaning fluid, thus achieving a dual cleaning function of the gate plate and avoiding wear and deposits.
It effectively avoids strong wear and easy deposits in knife gate valves during operation, extends valve service life, ensures production continuity and safety, and prevents media leakage.
Smart Images
Figure CN223498738U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of valve structure, and more particularly to a knife gate valve structure. Background Technology
[0002] Knife gate valves are specialized wear-resistant valves designed for media shut-off in the conveying processes of slurry, coal washing, and ash. Under these conditions, knife gate valves may experience varying degrees of severe wear and easy deposits. During use, valves often encounter problems such as "cannot be opened or closed tightly" and "short service life". Damage caused by wear and corrosion during use can easily lead to media leakage, directly affecting normal production operations and even causing environmental pollution and threats to life and property. Utility Model Content
[0003] This application provides a knife gate valve structure that can achieve a dual cleaning function for the gate, thereby avoiding strong wear and easy deposits during the operation of the knife gate valve.
[0004] This application discloses a knife gate valve structure, including a knife gate valve body, a gate, an actuator, and a cleaning mechanism; two knife gate valve bodies are connected along a first direction; the gate is slidably disposed between the two knife gate valve bodies along a second direction to block the communication between the two knife gate valve bodies; the actuator is connected to the gate to drive the gate to slide in the second direction; the cleaning mechanism includes a base, a first scraper, and a bushing; the base is disposed on the knife gate valve body, the base is provided with a flow channel, and the base is provided with cleaning holes at intervals along a third direction, all communicating with the flow channel; the first scraper is disposed on the base and can contact the surface of the gate; the bushing is disposed between the two knife gate valve bodies, and the gate slides through the bushing along the second direction, the bushing is provided with a second scraper, and the second scraper can contact the surface of the gate; the first direction, the second direction, and the third direction intersect perpendicularly to each other.
[0005] The knife gate valve structure of this application has at least the following beneficial effects:
[0006] The knife gate valve structure of this application includes a knife gate valve body, a gate, an actuator, and a cleaning mechanism. The cleaning mechanism includes a base, a first scraper, and a bushing. The base of this application is provided with a flow channel that can communicate with the cleaning fluid. The cleaning fluid in the flow channel is sprayed onto the surface of the gate through the cleaning holes on the base, thereby cleaning the gate. Furthermore, by setting the first scraper and the second scraper on the bushing, impurities on the surface of the gate can be scraped off during the up-and-down movement of the gate, achieving a dual cleaning function for the gate and avoiding problems such as strong wear and easy deposition during the operation of the knife gate valve. Attached Figure Description
[0007] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:
[0008] Figure 1 This is a schematic diagram of the knife gate valve structure of this application;
[0009] Figure 2 This is a side view of the knife gate valve structure of this application;
[0010] Figure 3 This is a front view of the gate valve structure of this application;
[0011] Figure 4 This is a schematic diagram of the valve body of the knife gate valve in this application;
[0012] Figure 5 This is a schematic diagram of the gate of this application;
[0013] Figure 6 This is a schematic diagram of the knife gate valve structure of this application with part of the structure hidden;
[0014] Figure 7 This is a schematic diagram of the base, the first scraper, and the connector of this application;
[0015] Figure 8 This is a partial schematic diagram of the knife gate valve structure;
[0016] Figure 9 This is a side sectional view of the cleaning mechanism and the gate (showing a partially enlarged view);
[0017] Figure 10 This is a schematic diagram of the packing block structure of this application;
[0018] The annotations in the attached figures are explained as follows:
[0019] 10. Knife gate valve body; 10a. Embedded groove; 11. Connecting ring; 12. Connecting plate;
[0020] 20. Gate; 201. Guide ramp;
[0021] 30. Actuator; 301. Connecting frame;
[0022] 40. Cleaning mechanism; 41. Base; 41a. Cleaning hole; 411. T-slot; 42. First scraper; 421. T-strip; 43. Bushing; 431. Ring sleeve; 431a. Ring groove; 4311. Guide arc surface; 432. Rectangular sleeve; 433. Second scraper; 44. Connector; 45. Seal;
[0023] 50. Packing block. Detailed Implementation
[0024] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.
[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.
[0026] This application discloses a knife gate valve structure, including a knife gate valve body 10, a gate 20, an actuator 30, and a cleaning mechanism 40, such as... Figures 1 to 3 As shown, the details are as follows:
[0027] In this embodiment, there are two knife gate valve bodies 10, which are connected in the first direction. Each knife gate valve body 10 includes a connecting ring 11 and a connecting plate 12 connected to the top of the connecting ring 11. The connecting rings 11 of the two knife gate valve bodies 10 are coaxially corresponding in the first direction, and the connecting plates 12 of the two knife gate valve bodies 10 are connected by threaded parts.
[0028] like Figure 4 As shown, the connecting ring 11 and the connecting plate 12 can be integrally formed. The connecting plate 12 and the connecting ring 11 are provided with embedded grooves 10a that are connected in the second direction. The embedded grooves 10a of the two knife gate valve bodies 10 are arranged opposite to each other in the first direction. The two embedded grooves 10a can be joined to form a rectangular groove. The rectangular groove is used to install the rectangular sleeve 432 of the cleaning mechanism 40.
[0029] like Figure 5As shown, the gate 20 is flat and has rounded corners at its lower end. Along the first direction, the gate 20 is located between the two knife gate valve bodies 10, and it can slide up and down in the second direction. When the gate 20 moves to correspond with the connecting ring 11 of the knife gate valve body 10, it can disconnect the connecting ring 11 of the two knife gate valve bodies 10, thereby blocking the flow of the medium. When the gate 20 is lifted upwards, the two connecting rings 11 gradually connect.
[0030] like Figure 2 As shown, the actuator 30 is mounted directly above the valve body 10 of the gate valve via a connecting frame 301. The connecting frame 301 is fixedly mounted on the upper end of the connecting plate 12 of the gate valve body 10. The actuator 30 is mounted on the connecting frame 301 and connected to the gate plate 20, driving the gate plate 20 to move up and down in a second direction. The actuator 30 includes a telescopic cylinder mounted on the connecting frame 301, with its telescopic end connected to the upper end of the gate plate 20. The telescopic direction of the cylinder is configured as the second direction, allowing the gate plate 20 to slide in the second direction. In some preferred embodiments, the telescopic cylinder has a hydraulic lock, and the telescopic cylinder's telescopic action is achieved by switching the direction of the high-pressure oil circuit connected to the hydraulic lock. In other embodiments, the actuator 30 may also employ a telescopic actuator such as a telescopic pneumatic cylinder.
[0031] like Figure 6 and Figure 7 As shown, the cleaning mechanism 40 includes a base 41, a first scraper 42, and a bushing 43. The base 41 is mounted on the connecting plate 12 of the gate valve body 10 and is located on one side of the gate 20. A flow channel is provided on the base 41, which flows through the base 41 along a third direction. Multiple cleaning holes 41a are provided on the side of the base 41 facing the gate 20, communicating with the flow channel. The multiple cleaning holes 41a are spaced apart along the third direction. Cleaning fluid (such as water) can flow through the flow channel. The cleaning fluid in the flow channel is sprayed onto the surface of the gate 20 through the cleaning holes 41a to clean the surface of the gate 20. Connectors 44 are provided at both ends of the flow channel, connecting the flow channel to the outside. The flow of the medium in the flow channel can be controlled by an external solenoid valve or electric gate valve. The first direction, the second direction, and the third direction intersect perpendicularly to each other, with the second direction being the height direction.
[0032] like Figure 8 As shown, in some preferred embodiments, there are two bases 41. Along the first direction, the two bases 41 are located on the front and rear sides of the gate 20 respectively. Each base 41 is provided with the flow channel and multiple cleaning holes 41a. The front and rear sides of the gate 20 can be cleaned through the flow channel on the two bases 41 and the multiple cleaning holes 41a connected to the flow channel.
[0033] like Figure 7 As shown, a first scraper 42 is disposed on a base 41. The blade of the first scraper 42 can contact the surface of the gate 20, thereby cleaning the gate 20. In this embodiment, there are two first scrapers 42, with each of the two bases 41 corresponding to one of them. The two first scrapers 42 are located on the front and rear sides of the gate 20 along the first direction, respectively, and are used to scrape off impurities on both sides of the gate 20. In some preferred embodiments, a T-shaped groove 411 (with a T-shaped cross-section along the first or second direction) is provided on the base 41. The T-shaped groove 411 connects to both sides of the base 41 along a third direction. A T-shaped strip 421 is provided on the side of the first scraper 42 away from the gate 20. The T-shaped strip 421 can slide into the T-shaped groove 411 along the third direction, and the T-shaped strip 421 and the T-shaped groove 411 are in clearance fit. In this embodiment, the first scraper 42 can be quickly installed through the cooperation of the T-shaped groove and the T-shaped strip 421. At the same time, due to the limitation of the T-shaped structure, the scraper will not shift vertically when it contacts the gate 20.
[0034] like Figure 6 and Figure 9 As shown, the bushing 43 includes a ring sleeve 431, a rectangular sleeve 432, and a second scraper 433, as detailed below:
[0035] The sleeve 431 is coaxially disposed within the connecting ring 11 of the two gate valve bodies 10. The outer circumference of the sleeve 431 fits against the inner circumference of the connecting ring 11. The axial thickness of the sleeve 431 is equal to the total thickness of the two connecting rings 11, and the axial end face of the sleeve 431 is flush with the axial end face of the connecting ring 11. A groove 431a is provided circumferentially on the inner circumferential surface of the sleeve 431. The groove 431a can accommodate the gate plate 20. When the gate plate 20 descends, it extends into the groove 431a, thereby blocking the connecting rings 11 on both sides.
[0036] like Figure 9 As shown, along the second direction, a guide arc surface 4311 is provided at the groove opening of the lower half of the annular groove 431a. A guide slope 201 that can contact the guide arc surface 4311 is provided below the gate 20. The guide arc surface 4311 is used to contact the guide slope 201 on the gate 20 when the gate 20 descends and guides the gate 20 to be inserted into the annular groove 431a. This avoids the situation where the bushing 43 and the gate 20 do not fit tightly or the gate 20 cannot be closed properly due to gravity deposition during medium transportation.
[0037] like Figure 9As shown, the second scraper 433 is disposed on the inner circumference of the ring 431, and the blade of the second scraper 433 extends to the groove opening of the annular groove 431a. The blade of the second scraper 433 can contact the surface of the gate plate 20, and impurities on the gate plate 20 can be scraped off by the second scraper 433. In this embodiment, there are two second scrapers 433, which are respectively disposed on the front and rear sides of the gate plate 20 along the first direction for cleaning the front and rear sides of the gate plate 20.
[0038] like Figure 6 As shown, a rectangular sleeve 432 is connected to the top of the ring sleeve 431 along the second direction. A first central slot is provided through the rectangular sleeve 432 along the second direction, extending downwards into the annular groove 431a of the ring sleeve 431, providing space for the gate plate 20 to move. The outer circumferential surface of the rectangular sleeve 432 fits against the inner circumferential wall of the embedded groove 10a on the knife gate valve body 10. The embedded groove 10a avoids the rectangular sleeve 432, allowing the end faces of the connecting rings 11 of the two knife gate valve bodies 10 to fit together. Simultaneously, the embedded groove 10a restricts the position of the rectangular sleeve 432, thereby ensuring the stability of the ring sleeve 431. In this embodiment, both the ring sleeve 431 and the rectangular sleeve 432 are made of elastic materials such as rubber or sponge.
[0039] like Figure 6 and Figure 10 As shown, a packing block 50 is provided between the inner peripheral wall of the embedded groove 10a and the gate 20. The packing block 50 is located above the rectangular sleeve 432. The packing block 50 has a second central slot through it along the second direction. The slide plate passes through the second central slot. The packing block 50 can fill the gap between the gate 20 and the inner peripheral wall of the embedded groove 10a, which serves two purposes: sealing and ensuring the stability of the gate 20's vertical movement. The lower end of the base 41 is connected to the connecting plate 12 of the knife gate valve body 10 through the packing block 50.
[0040] like Figure 6 As shown, in some embodiments, the axial end face of the ring 431 is provided with a sealing groove, and a sealing element 45 (such as a sealing ring) is provided in the sealing groove. The sealing element 45 can enable the knife gate valve structure to achieve a sealing function when it is matched with the external structure, so as to prevent the leakage of the transported medium.
[0041] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.
Claims
1. A knife gate valve structure, characterized in that, It includes a knife gate valve body (10), a gate (20), an actuator (30), and a cleaning mechanism (40); The two knife gate valve bodies (10) are connected along a first direction; the gate (20) is slidably disposed between the two knife gate valve bodies (10) along a second direction to block the communication between the two knife gate valve bodies (10); the actuator (30) is connected to the gate (20) to drive the gate (20) to slide in the second direction; The cleaning mechanism (40) includes a base (41), a first scraper (42), and a bushing (43). The base (41) is disposed on the valve body (10) of the gate valve. The base (41) is provided with a flow channel, and the base (41) is provided with cleaning holes (41a) that are all connected to the flow channel at intervals along the third direction. The first scraper (42) is disposed on the base (41) and can contact the surface of the gate plate (20). The bushing (43) is disposed between the two gate valve bodies (10), and the gate plate (20) slides through the bushing (43) along the second direction. The bushing (43) is provided with a second scraper (433) and can contact the surface of the gate plate (20). The first direction, the second direction, and the third direction intersect each other perpendicularly.
2. The knife gate valve structure according to claim 1, characterized in that, The actuator (30) includes a telescopic cylinder; the telescopic cylinder is mounted on the valve body (10) of the knife gate valve via a connecting frame (301), and the telescopic end of the telescopic cylinder is connected to the gate plate (20), and the telescopic direction of the telescopic cylinder is configured as the second direction.
3. The knife gate valve structure according to claim 1, characterized in that, The base (41) is disposed at the top of the valve body (10) of the two knife gate valves, and the two bases (41) are respectively disposed opposite to each other on both sides of the gate plate (20) along the first direction; both ends of the flow channel are provided with connectors (44).
4. The knife gate valve structure according to claim 3, characterized in that, The two first scrapers (42) are respectively disposed on both sides of the gate (20) along the first direction.
5. The knife gate valve structure according to claim 4, characterized in that, The base (41) is provided with a through T-shaped groove (411) along a third direction, and the first scraper (42) is provided with a T-shaped strip (421) that cooperates with the T-shaped groove (411).
6. The knife gate valve structure according to claim 1, characterized in that, The bushing (43) includes an annular sleeve (431), a rectangular sleeve (432), and a second scraper (433). The annular sleeve (431) is coaxially disposed between the two knife gate valve bodies (10), and the inner circumference of the annular sleeve (431) is provided with an annular groove (431a) that can accommodate the gate plate (20). The outer circumference of the annular sleeve (431) is respectively fitted with the inner circumference of the two knife gate valve bodies (10). The second scraper (433) is disposed on the annular sleeve (431) and extends into the annular groove (431a). The rectangular sleeve (432) is disposed above the annular sleeve (431) along the second direction, and the rectangular sleeve (432) is provided with a first central strip hole that connects to the annular groove (431a).
7. The knife gate valve structure according to claim 6, characterized in that, The groove (431a) has a guide arc surface (4311) at the groove opening, and the gate (20) has a guide slope (201) below it. The guide arc surface (4311) is used to contact the guide slope (201) and guide the gate (20) to be inserted into the groove (431a).
8. The knife gate valve structure according to claim 7, characterized in that, The valve body (10) of the knife gate valve is provided with an inset groove (10a) that is recessed in the first direction. The rectangular sleeve (432) is fitted into the inset groove (10a) of the two knife gate valve bodies (10) so that the two knife gate valve bodies (10) can fit together and connect in the first direction.
9. The knife gate valve structure according to claim 8, characterized in that, A packing block (50) is provided between the inner peripheral wall of the embedded groove (10a) and the gate (20), and the gate (20) slides through the packing block (50) in the second direction.
10. The knife gate valve structure according to any one of claims 6 to 9, characterized in that, A sealing groove is provided on the axial end face of the ring (431), and a sealing element (45) is provided in the sealing groove.