Screen cloth protection device and shaker screen
By introducing a screen cloth protection device into the vibrating screen, and using the guide plate and guide hole structure to slow down the drilling fluid flow rate and sand impact, the problem of easy damage to the screen cloth is solved, and the screen cloth service life is extended and the cost is reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SINOPEC OILFIELD SERVICE CORPORATION
- Filing Date
- 2025-08-29
- Publication Date
- 2026-07-24
AI Technical Summary
The rear end of the screen cloth in existing vibrating screens is easily damaged by the impact of sand and gravel in the drilling fluid during the drilling process, resulting in a short service life and the need for frequent replacement, which increases the operating cost.
A screen cloth protection device was designed, including a base plate, a first guide plate, and a second guide plate, which are set at the rear end of the screen cloth. The guide hole structure slows down the drilling fluid flow rate and bears part of the sand and gravel impact, reducing the direct scouring force on the screen cloth. Combined with the airbag fixing device, it ensures stable installation.
It extends the service life of the screen cloth, reduces the replacement frequency and the operating cost of the vibrating screen, and improves the durability of the screen cloth and the operating efficiency of the equipment.
Smart Images
Figure CN224542316U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of screening equipment technology, and in particular to a screen cloth protection device and a vibrating screen. Background Technology
[0002] Drilling fluid is a general term for various circulating fluids that meet the needs of drilling work by fulfilling multiple functions. According to their composition, they can be divided into water, mud, clay-free flushing fluid, emulsion, foam and compressed air, etc. Among them, mud is a widely used drilling fluid, which is mainly suitable for unstable rock formations with loose, fractured, easily collapsing and falling rocks, and expanding and peeling when exposed to water.
[0003] Chinese patent CN112642704A discloses an ultrasonic drilling fluid vibrating screen. Utilizing the cavitation effect of ultrasound, it removes air bubbles generated during drilling fluid vibration, improving not only the screening efficiency but also enabling more thorough solid-liquid separation. In existing vibrating screens, solids such as sand and gravel in the drilling fluid continuously impact the screen cloth, particularly the rear end, leading to a short lifespan and frequent replacement. Utility Model Content
[0004] This utility model provides a screen cloth protection device and a vibrating screen. The screen cloth protection device increases the service life of the screen cloth and reduces the frequency of screen cloth replacement and the operating cost of the vibrating screen.
[0005] On the one hand, this utility model provides a screen cloth protection device, including a base plate, a first guide plate and a second guide plate. The first guide plate and the second guide plate are spaced apart and are both vertically connected to the base plate. The first guide plate has a first guide hole and the second guide plate has a second guide hole.
[0006] In one embodiment, the screen cloth protection device further includes a third guide plate, which has a third guide hole. One side of the third guide plate is connected to the top of the first guide plate, and the third guide plate is parallel to the bottom plate.
[0007] In one embodiment, the third guide plate is located on the side of the first guide plate opposite to the second guide plate.
[0008] In one embodiment, the bottom of the second guide plate is connected to one side edge of the base plate, and the bottom of the first guide plate is connected to the middle of the base plate.
[0009] In one embodiment, the orthographic projection of the third guide plate onto the base plate does not extend beyond the base plate.
[0010] In one embodiment, the second guide plate is further provided with a fourth guide hole, the fourth guide hole being located above the second guide hole, and the area of the fourth guide hole being larger than the area of the second guide hole.
[0011] In one embodiment, the length of the bottom of the first guide plate and the length of the bottom of the second guide plate are both less than the length of the base plate.
[0012] On the other hand, a vibrating screen is provided, including a screen cloth and a screen cloth protection device as described in any of the above embodiments, wherein the screen cloth protection device is disposed at the rear end of the screen cloth, and the base plate of the screen cloth protection device covers the surface of the screen cloth.
[0013] In one embodiment, the vibrating screen further includes a screen frame and a fixing device, the screen cloth is placed above the screen frame, and the fixing device is disposed above the screen cloth and can press the screen cloth protection device onto the screen cloth.
[0014] In one embodiment, the fixing device includes an airbag and a mounting frame, the airbag being disposed in the mounting frame, the mounting frame being located above both sides of the screen cloth, the mounting frame having an opening on one side facing the screen cloth, and the airbag being disposed inside the mounting frame. Compared with the prior art, the advantages of this utility model are that the bottom plate of the screen cloth protection device covers the screen cloth, preventing the easily damaged rear end of the screen cloth from being directly impacted by the drilling fluid. The first guide plate and the second guide plate on the bottom plate can both slow down the flow rate of the drilling fluid and bear some of the impact of sand and gravel in the drilling fluid. The first guide hole on the first guide plate and the second guide hole on the second guide plate allow the drilling fluid to pass through. The first guide plate and the second guide plate are used together to significantly reduce the scouring force of the drilling fluid on the surface of the screen cloth, thereby extending the service life of the screen cloth, reducing the replacement frequency of the screen cloth and the operating cost of the vibrating screen. Attached Figure Description
[0015] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.
[0016] Figure 1 This is one of the perspective views of the screen cloth protection device in the embodiments of this utility model; Figure 2 This is a second perspective view of the screen cloth protection device in an embodiment of this utility model; Figure 3 This is a top view of the screen cloth protection device in an embodiment of this utility model; Figure 4 This is a side view of the screen cloth protection device in an embodiment of this utility model; Figure 5This is a schematic diagram of the installation position of the screen cloth protection device in an embodiment of this utility model; Figure 6 This is a schematic diagram of the structure of the vibrating screen in an embodiment of this utility model.
[0017] Figure label: 1. Screen cloth protection device; 11. Base plate; 12. First guide plate; 121. First guide hole; 13. Second guide plate; 131. Second guide hole; 132. Fourth guide hole; 14. Third guide plate; 141. Third guide hole; 2. Screen cloth; 3. Screen frame; 4. Fixing device; 41. Mounting frame; 42. Airbag. Detailed Implementation
[0018] The present invention will be further described below with reference to the accompanying drawings.
[0019] like Figures 1 to 4 As shown, a screen cloth protection device 1 according to an embodiment of the present invention includes a base plate 11, a first guide plate 12 and a second guide plate 13. The first guide plate 12 and the second guide plate 13 are spaced apart and are both vertically connected to the base plate 11. The first guide plate 12 is provided with a first guide hole 121 and the second guide plate 13 is provided with a second guide hole 131.
[0020] like Figure 5 As shown, a vibrating screen according to an embodiment of the present invention includes a screen cloth 2 and a screen cloth protection device 1. The screen cloth protection device 1 is disposed at the rear end of the screen cloth 2, and the bottom plate 11 of the screen cloth protection device 1 covers the surface of the screen cloth 2.
[0021] Since the drilling fluid is input from above the rear end of the screen cloth 2, the base plate 11 of the screen cloth protection device 1 covers the screen cloth 2, preventing the easily damaged rear end of the screen cloth 2 from being directly impacted by the drilling fluid, thus extending the service life of the screen cloth 2 at this point. The first guide plate 12 and the second guide plate 13 provided on the base plate 11 can both slow down the flow rate of the drilling fluid and bear some of the impact of sand and gravel in the drilling fluid. The first guide hole 121 opened on the first guide plate 12 and the second guide hole 131 opened on the second guide plate 13 allow the drilling fluid to pass through. The first guide plate 12 and the second guide plate 13 used together can significantly reduce the scouring force of the drilling fluid on the surface of the screen cloth 2, thereby extending the service life of the screen cloth 2, reducing the replacement frequency of the screen cloth 2 and the operating cost of the vibrating screen.
[0022] Furthermore, the screen protection device 1 also includes a third guide plate 14, on which a third guide hole 141 is provided. One side of the third guide plate 14 is connected to the top of the first guide plate 12, and the third guide plate 14 is parallel to the bottom plate 11. The third guide plate 14 is positioned relatively high, so when the drilling fluid flow rate is large, the first guide hole 121 on the first guide plate 12 is submerged, and some of the drilling fluid can be decelerated through the third guide plate 14. In this embodiment, the first guide hole 121 on the first guide plate 12 is numerous, making the width of each first guide hole 121 relatively narrow, thereby having a better blocking effect on sand and gravel in the drilling fluid and effectively reducing the flow rate of the drilling fluid. The area of the third guide hole 141 on the third guide plate 14 is larger than that of the first guide hole 121, and the number of the third guide holes 141 is less than the number of the first guide holes 121. The third guide plate 14 makes the resistance of drilling fluid flow relatively small to cope with the working conditions when the drilling fluid flow rate is large.
[0023] like Figure 1 and Figure 2 As shown, a fourth guide hole 132 is also provided on the second guide plate 13. The fourth guide hole 132 is located above the second guide hole 131, and the area of the fourth guide hole 132 is larger than the area of the second guide hole 131. When the drilling fluid flow rate is large, the second guide hole 131 on the second guide plate 13 will be submerged. In order to reduce the resistance of the second guide plate 13 to the drilling fluid when the drilling fluid flow rate is large, a smaller number of fourth guide holes 132 with a larger area are provided on the upper layer of the second guide plate 13. A larger number of second guide holes 131 with a smaller area are provided on the lower layer of the second guide plate 13, thereby having a better blocking effect on sand and gravel in the drilling fluid and effectively reducing the flow rate of the drilling fluid.
[0024] like Figure 4 As shown, the third guide plate 14 is located on the side of the first guide plate 12 away from the second guide plate 13. The reason why the third guide plate 14 is not placed on the side of the first guide plate 12 close to the second guide plate 13 is to prevent sand and gravel in the drilling fluid from passing through the third guide plate 14 across the gap between the first guide plate 12 and the second guide plate 13 and falling onto the screen cloth 2 not covered by the bottom plate 11, thereby preventing sand and gravel in the drilling fluid from directly impacting the screen cloth 2.
[0025] like Figure 4As shown, the bottom of the second guide plate 13 is connected to one edge of the base plate 11, and the bottom of the first guide plate 12 is connected to the middle of the base plate 11. The second guide plate 13 is positioned at the edge of the base plate 11 to fully utilize the space on the base plate 11, creating a larger gap between the second guide plate 13 and the first guide plate 12, reducing the probability of sand and gravel in the drilling fluid clogging between the second guide plate 13 and the first guide plate 12. The first guide plate 12 is not positioned at the other edge of the base plate 11 to make room for the installation of the third guide plate 14.
[0026] Furthermore, the orthographic projection of the third guide plate 14 onto the base plate 11 does not extend beyond the base plate 11. If the edge of the third guide plate 14 extends beyond the base plate 11, the third guide plate 14 may interfere with other structures within the vibrating screen, thereby hindering the smooth installation of the screen cloth protection device 1.
[0027] like Figure 1 and Figure 2 As shown, the length of the bottom of the first guide plate 12 and the bottom of the second guide plate 13 are both less than the length of the base plate 11. This leaves a certain gap on both sides of the base plate 11 to facilitate the fixing of the screen cloth protection device 1.
[0028] like Figure 6 As shown, the vibrating screen in this embodiment also includes a screen frame 3 and a fixing device 4. The screen cloth 2 is placed above the screen frame 3, and the fixing device 4 is positioned above the screen cloth 2 and can press the screen cloth protection device 1 onto the screen cloth 2. The length of the base plate 11 is consistent with the width of the screen cloth 2. By pressing the two sides of the base plate 11, the fixing device 4 can firmly fix the screen cloth protection device 1 to the rear end of the screen cloth 2. The screen cloth protection device 1 will not be displaced due to the impact of drilling fluid. The fixing device 4 also presses and fixes the screen cloth 2 onto the screen frame 3, so there is no need to set up a separate structure for fixing the screen cloth protection device 1. When it is necessary to replace the screen cloth protection device 1 or the screen cloth 2, it is only necessary to loosen the fixing device 4, which is very convenient.
[0029] Before installing the screen cloth protection device 1, the screen cloth 2 needs to be pulled outwards a certain distance so that the rear end of the screen cloth 2 does not cover the rear end of the screen frame 3. Make enough space between the screen frame 3 and the fixing device 4 to place the base plate 11, so that the top surface of the base plate 11 is in contact with the lower surface of the fixing device 4, and then push the screen cloth 2 back so that the screen cloth 2 is located between the base plate 11 and the screen frame 3.
[0030] Specifically, the fixing device 4 includes an air bladder 42 and a mounting frame 41. The air bladder 42 is disposed within the mounting frame 41, which is located above both sides of the screen cloth 2. The mounting frame 41 has an opening on one side facing the screen cloth 2, and the air bladder 42 is disposed inside the mounting frame 41. By inflating and deflating the air bladder 42, it can be pressed tightly against the edge of the screen cloth 2 or separated from the screen cloth 2, thereby fixing the screen cloth 2. By adjusting the amount of air, the clamping force of the fixing device 4 can also be adjusted to ensure a good fixing effect.
[0031] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A screen cloth protection device, characterized in that, It includes a base plate, a first guide plate and a second guide plate. The first guide plate and the second guide plate are spaced apart and are both perpendicularly connected to the base plate. The first guide plate has a first guide hole and the second guide plate has a second guide hole.
2. The screen cloth protection device according to claim 1, characterized in that, It also includes a third guide plate, which has a third guide hole. One side of the third guide plate is connected to the top of the first guide plate, and the third guide plate is parallel to the bottom plate.
3. The screen cloth protection device according to claim 2, characterized in that, The third guide plate is located on the side of the first guide plate opposite to the second guide plate.
4. The screen cloth protection device according to claim 3, characterized in that, The bottom of the second guide plate is connected to one side edge of the base plate, and the bottom of the first guide plate is connected to the middle of the base plate.
5. The screen cloth protection device according to claim 4, characterized in that, The orthographic projection of the third guide plate onto the base plate does not extend beyond the base plate.
6. The screen cloth protection device according to claim 1, characterized in that, The second guide plate is also provided with a fourth guide hole, which is located above the second guide hole, and the area of the fourth guide hole is larger than the area of the second guide hole.
7. The screen cloth protection device according to claim 1, characterized in that, The length of the bottom of the first guide plate and the length of the bottom of the second guide plate are both less than the length of the base plate.
8. A vibrating screen, characterized in that, The device includes a screen cloth and a screen cloth protection device according to any one of claims 1 to 7, wherein the screen cloth protection device is disposed at the rear end of the screen cloth and the base plate of the screen cloth protection device covers the surface of the screen cloth.
9. The vibrating screen according to claim 8, characterized in that, It also includes a screen frame and a fixing device. The screen cloth is placed above the screen frame, and the fixing device is located above the screen cloth and can press the screen cloth protection device onto the screen cloth.
10. The vibrating screen according to claim 9, characterized in that, The fixing device includes an airbag and a mounting frame. The airbag is disposed in the mounting frame, which is located above both sides of the screen cloth. The mounting frame has an opening on one side facing the screen cloth, and the airbag is disposed inside the mounting frame.