A pull-out type vibrating screen with sealed screen mesh

Abstract

The purpose of this invention is to provide a pull-out type sealing screen for vibrating screens, belonging to the field of vibrating screen technology. One end face of the screen body has a protrusion penetrating the screen body, and the other end face has a groove matching the protrusion, with a sealing strip inside the groove. The upper surface of the protrusion is an arc-shaped surface, higher in the middle and lower at both ends. Several buckles are provided on the outer end face of the protrusion, and several slots are provided on the groove to engage with the buckles. At least one sealing rib penetrating the protrusion is provided at the bottom of the sealing strip, and side sealing portions are provided on both sides of the sealing strip. This invention allows for convenient connection of several screens together through the buckles on the protrusion and the slots on the groove, greatly improving the efficiency of screen loading and unloading. Through the arc-shaped protrusion, and with the action of the sealing strip, complete sealing of the screen during use is achieved, preventing harmful solid phases from entering the drilling fluid below the screen, thereby ensuring the quality of the drilling fluid.

Description

Technical Field

[0001] This invention relates to the field of drilling mud screening equipment technology, specifically to a pull-out type vibrating screen with a sealed screen mesh. Background Technology

[0002] In oil drilling equipment, the primary function of vibrating screens is solid-liquid separation. These screens come in various mesh sizes, and separation is achieved through different mesh counts. Conventional vibrating screens are generally single-layer structures, allowing for easy removal of individual screens. However, to increase drilling mud throughput, multi-layer screens with two or more layers have been developed within the same floor space. Due to the limited height space between upper and lower screens, disassembling and assembling the screens is difficult. Furthermore, the rigid connection between adjacent screens creates gaps, allowing harmful solid phases on the screen surface to flow with the liquid phase into the area below the screen during normal operation, resulting in sand leakage and affecting drilling fluid quality. To address this sand leakage issue, those skilled in the art have conducted research on screen beds.

[0003] Chinese patent CN204121852U discloses a fully sealed drilling fluid vibrating screen bed. It features horizontal rubber strips installed on the upper front and rear sides of the screen bed and side rubber strips installed on the upper left and right sides of the screen bed, meaning that sealing strips are installed around the entire screen bed. The sealing strips are fixed to the screen bed by connecting strips around the screen bed, and the screen mesh and the screen bed are sealed by the sealing strips, making it less likely for gaps to appear. Harmful solid phases cannot mix into the drilling fluid through the gaps between the screen bed and the screen mesh, thus improving the screening effect and ensuring the quality of the drilling fluid.

[0004] While the aforementioned patented technology offers excellent sealing performance, preventing harmful solid phases from entering through the gap between adjacent screens and ensuring drilling fluid quality, it presents several challenges in practical application: 1. Complex screen structure: In addition to connecting strips around the screen, horizontal and side strips matching the sealing strips are required, complicating the structure. 2. Difficult screen assembly and disassembly, especially in multi-layer screens, where height limitations between upper and lower screens hinder assembly and disassembly. 3. Difficulty in replacing sealing strips: During screen assembly and disassembly in multi-layer screens, friction from the sealing strips increases the pushing and pulling forces, accelerating strip wear. Replacement after prolonged wear is further complicated by the limited height between upper and lower screens. Summary of the Invention

[0005] The purpose of this invention is to provide a pull-out type vibrating screen with a sealed screen mesh. It can be easily connected by a buckle on the protrusion and a groove on the groove, which greatly improves the efficiency of screen loading and unloading. Through the arc-shaped protrusion, the screen mesh is completely sealed during use under the action of the sealing strip, which prevents harmful solid phases from entering the drilling fluid below the screen mesh, thereby ensuring the quality of the drilling fluid.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a pull-out vibrating screen with a sealed screen mesh, comprising a screen mesh body, wherein one end face of the screen mesh body is provided with a protrusion penetrating the screen mesh body, and the other end face is provided with a groove matching the protrusion, wherein a sealing strip is provided in the groove; The upper surface of the protrusion is an arc-shaped surface that is high in the middle and low at both ends, and the two ends of the arc-shaped surface are located near the bottom of the screen body. The outer end face of the protrusion is provided with several buckles, and the groove is provided with several slots that engage with the buckles; The bottom of the sealing strip is provided with at least one through-protruding sealing rib, and both sides of the sealing strip are provided with side sealing parts to prevent mud between the side plate of the screen box and the screen from entering the screen.

[0007] As an improvement of the present invention, the side sealing part is a sealing oblique block that is perpendicular to the sealing rib and matches the upper surface of the protrusion.

[0008] As an improvement of the present invention, the side sealing part is a short sealing rib that is distributed parallel to the long sealing rib and installed in the bottom gap between two adjacent screens.

[0009] As an improvement of the present invention, the cross-sectional shape of the arc-shaped surface is an oblique line.

[0010] As an improvement of the present invention, the sealing strip and the groove are connected by vulcanization.

[0011] As an improvement of the present invention, the top of the sealing strip is provided with at least one connecting groove that penetrates the sealing strip.

[0012] As an improvement of the present invention, the connecting groove is a U-shaped groove, and the number of such grooves is one or two.

[0013] As an improvement of the present invention, the number of the sealing ribs is one or two.

[0014] The beneficial effects of this invention are as follows: This application uses a snap-fit ​​connection on the protrusion and a slot on the groove for engagement. That is, by snapping the snap-fit ​​into the slot, several screens can be easily connected together. When disassembling the screens, simply pull out the outermost screen, which will move the other screens outwards simultaneously. Then, remove them one by one to check for wear. When installing the screens, simply snap the snap-fit ​​into the groove and push the outermost screen. This engagement connection method greatly improves the efficiency of screen installation and removal and reduces the labor intensity of workers. By designing the raised upper surface as an arc-shaped surface that is higher in the middle and lower at both ends, with the two ends of the arc-shaped surface positioned near the bottom of the screen body, the seals on both sides of two adjacent screens are located at the bottom of the screen body. Under the action of the screen clamping device, after the screen is clamped, the sealing ribs are flattened on the arc-shaped surface to seal the mud channel above the arc-shaped surface. The mud between the screen box side plate and the screen is sealed by the side sealing parts on both sides of the sealing strip, preventing mud from entering the screen and thus ensuring the quality of the drilling fluid below the screen. Therefore, this application achieves complete sealing of the screen during use through the combined action of the sealing ribs and side sealing parts. The structure is novel and simple, the performance is safe and reliable, and the manufacturing cost is low.

[0015] Furthermore, the side sealing part is a sealing inclined block that is perpendicular to the sealing ribs and matches the upper surface of the protrusion. By setting the sealing inclined block, the mud between the screen box side plate and the screen mesh side is completely sealed outside the screen mesh. Under the action of the screen mesh clamping device, the bottom of the sealing inclined block is directly pressed and sealed onto the arc-shaped surface of the protrusion, partially filling the gap between the screen box side plate and the screen mesh, thus completely blocking harmful solid phases outside the screen mesh, thereby ensuring the quality of the drilling fluid.

[0016] Furthermore, the side sealing part is a short sealing rib that is distributed parallel to the long sealing rib and installed in the bottom gap between two adjacent screens. This design prevents mud containing harmful solid phases between the screen box side plate and the screen from entering the drilling fluid below the screen through the bottom gap between the two adjacent screens. The structure is simple and easy to manufacture.

[0017] Furthermore, the cross-sectional shape of the arc-shaped surface is an oblique line. By designing the cross-sectional shape of the arc-shaped surface as an oblique line, that is, designing the arc-shaped surface as an inclined structure, in addition to increasing the effective sealing area and thus improving the sealing effect, it also plays a guiding role for the sealing ribs, causing the sealing ribs to bend and press along the same direction of the oblique line under the action of the clamping force. Compared with the planar structure, the clamping force is greatly reduced, and the sealing effect is further improved.

[0018] Furthermore, the sealing strip and the groove are connected by vulcanization, and the top of the sealing strip is provided with at least one U-shaped connecting groove that penetrates the sealing strip. By vulcanizing the sealing strip to connect it to the groove, the process is simple and easy to operate; by providing at least one U-shaped connecting groove that penetrates the sealing strip at the top, the vulcanization area is increased, and the connection is firm and reliable. Attached Figure Description

[0019] Figure 1 This is a first-view perspective three-dimensional structural diagram of the screen in Embodiment 1 of the present invention; Figure 2 for Figure 1 A magnified view of part A in the image; Figure 3 This is a second-view perspective three-dimensional structural diagram of the screen in Embodiment 1 of the present invention; Figure 4 for Figure 3 A magnified view of part B in the image; Figure 5 This is a three-dimensional structural diagram of the screen in Embodiment 1 of the present invention from a third perspective; Figure 6 This is a partial cross-sectional view of a position away from the side plate of the screen box when two adjacent screens overlap in Embodiment 1 of the present invention; Figure 7 This is a three-dimensional structural diagram of the sealing strip in Embodiment 1 of the present invention; Figure 8 This is a three-dimensional structural diagram of the sealing strip in Embodiment 2 of the present invention; Figure 9 This is a three-dimensional structural diagram of the sealing strip in Embodiment 3 of the present invention; Figure 10 This is a partial cross-sectional view of the area near the side plate of the screen box when two adjacent screens overlap in Embodiment 3 of the present invention; Figure 11 This is a three-dimensional structural diagram of the sealing strip in Embodiment 4 of the present invention.

[0020] In the diagram: 1. Screen body; 11. Protrusion; 111. Arc-shaped surface; 12. Buckle; 13. Sealing strip; 131. Sealing long rib; 132. Connecting groove; 133. Side sealing part; 134. Sealing short rib; 14. Slot; 15. Groove; 2. Mud channel. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] It should be noted that the directional terms such as up, down, left, right, top, and bottom used in the embodiments of the present invention are only relative concepts or are based on the normal use state of the product, and should not be considered as restrictive. Example

[0023] like Figures 1 to 7 As shown, a pull-out vibrating screen with a sealed screen mesh includes a screen body 1. One end face of the screen body 1 is provided with a protrusion 11 penetrating the screen body 1, and the other end face is provided with a groove 15 matching the protrusion 11. A sealing strip 13 is provided in the groove 15, and the sealing strip 13 and the groove 15 are connected by vulcanization. The upper surface of the protrusion 11 is an arc-shaped surface 111 that is high in the middle and low at both ends. The two ends of the arc-shaped surface 111 are located near the bottom of the screen body 1. A plurality of buckles 12 are provided on the outer end face of the protrusion 11. The number of buckles 12 is preferably three or more and evenly distributed on the protrusion 11. In this embodiment, there are five buckles. The specific number can be set according to the actual situation. This embodiment does not limit the specific number. The groove 15 is provided with a number of slots 14 that engage with the buckle 12, wherein the number and position of the slots 14 correspond one-to-one with the buckle 12; the bottom of the sealing strip 13 is provided with at least one sealing rib 131 that penetrates the protrusion 11. In this embodiment, there are two ribs. The sealing rib 131 contacts the arc surface 111. Under the action of the screen pressing device, after the screen is pressed, the sealing rib 131 is flattened on the arc surface 111 to seal the mud channel 2 above the arc surface 111, so that the mud containing harmful solid phases that enters the mud channel 2 cannot enter the drilling fluid below the screen. Both sides of the sealing strip 13 are provided with side sealing parts 133 to prevent mud between the screen box side plate and the screen from entering the screen. Preferably, the side sealing part 133 is a sealing inclined block that is perpendicular to the sealing rib 131 and matches the upper surface of the protrusion 11. The bottom surface of the sealing inclined block does not exceed the bottom surface of the screen. Preferably, the bottom surface of the sealing inclined block is flush with the bottom of the sealing rib 131. In actual operation, under the action of the screen pressing device, the sealing inclined block is pressed and sealed at both ends of the arc surface 111, so that the mud between the screen box side plate and the screen cannot enter the screen. Under the action of the screen pressing device, the bottom of the sealing inclined block is directly pressed and sealed on the arc surface 111 of the protrusion 11, partially filling the gap between the screen box side plate and the screen, so that harmful solid phases are completely blocked outside the screen, thereby ensuring the quality of drilling fluid. Therefore, the combined effect of the sealing rib 131 and the side sealing part 133 enables the screen to achieve complete sealing during use. The structure is novel and simple, the performance is safe and reliable, and the manufacturing cost is low.

[0024] Preferably, the cross-sectional shape of the arc-shaped surface 111 is an oblique line. Figure 6In the middle, the left end of the diagonal line is higher than the right end, that is, the diagonal line slopes downward from left to right. By designing the arc surface 111 as an inclined structure, in addition to increasing the effective sealing area and thus improving the sealing effect, it also plays a guiding role for the sealing rib 131, so that the sealing rib 131 is bent and pressed in the same direction of the diagonal line under the action of the clamping force. Compared with the planar structure, the clamping force of the sealing strip 13 is greatly reduced, and the sealing effect is further improved.

[0025] To ensure a more secure connection between the sealing strip 13 and the groove 15, at least one connecting groove 132 penetrating the top of the sealing strip 13 is provided. Preferably, the connecting groove 132 is U-shaped, and there may be one, two, or three grooves; in this embodiment, there are two. The shape of the connecting groove 132 may also be semi-circular, T-shaped, triangular, etc.; this embodiment does not limit its specific shape.

[0026] Preferably, the screen body 1, protrusion 11, buckle 12, slot 14 and groove 15 are integrally injection molded structures; the sealing strip 13, sealing rib 131, connecting groove 132 and side sealing part 133 are integrally molded structures that are easy to process, low in cost and safe and reliable in performance. Example

[0027] like Figure 8 As shown, the difference between this embodiment and Embodiment 1 is that the number of sealing ribs 131 is only one, and it is positioned close to the center of the sealing strip 13. Compared with Embodiment 1, this embodiment has a simpler structure and lower manufacturing cost, but its sealing effect is poorer. Example

[0028] like Figure 9 and Figure 10 As shown, this embodiment differs from Embodiment 1 in that the side sealing part 133 is a short sealing rib 134 that is parallel to the long sealing rib 131 and installed in the bottom gap between two adjacent screens. In other words, the short sealing rib 134 is installed in the bottom gap between two adjacent screens, and the bottom gaps on both sides between the two adjacent screens are sealed by the short sealing rib 134. This prevents mud containing harmful solid phases between the screen box side plate and the screen from entering the drilling fluid below the screen through the bottom gap between the two adjacent screens. The structure is simple and easy to manufacture. Example

[0029] like Figure 11As shown, the difference between this embodiment and Embodiment 3 is that the number of sealing ribs 131 is only one, and it is positioned close to the center of the sealing strip 13. Compared with Embodiment 3, this embodiment has a simpler structure and lower manufacturing cost, but its sealing effect is poorer. The above is a detailed description of a pull-out vibrating screen sealing mesh provided by the present invention. Specific examples have been used to illustrate the structural principle and implementation method of the present invention. The above embodiments are only used to help understand the method and core idea of ​​the present invention; at the same time, for those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A retractable vibrating screen with a sealed screen mesh, comprising a screen mesh body, characterized in that: One end face of the screen body is provided with a protrusion that penetrates the screen body, and the other end face is provided with a groove that matches the protrusion. A sealing strip is provided in the groove. The upper surface of the protrusion is an arc-shaped surface that is high in the middle and low at both ends. The two ends of the arc-shaped surface are located near the bottom of the screen body, and the cross-sectional shape of the arc-shaped surface is an oblique line. The outer end face of the protrusion is provided with several buckles, and the groove is provided with several slots that engage with the buckles; The bottom of the sealing strip is provided with at least one through-protruding sealing rib, which is in contact with the arc-shaped surface. Both sides of the sealing strip are provided with side sealing parts to prevent mud between the side plate of the screen box and the screen from entering the screen. The side sealing part is a sealing inclined block that is perpendicular to the sealing rib and matches the upper surface of the protrusion. The side sealing part is a short sealing rib that is distributed parallel to the long sealing rib and installed in the bottom gap between two adjacent screens. The sealing strip is connected to the groove by vulcanization; The top of the sealing strip is provided with at least one connecting groove that penetrates the sealing strip; The connecting groove is a U-shaped groove, and there are one or two of them.

2. The retractable vibrating screen sealing mesh according to claim 1, characterized in that: The number of the sealing ribs is one or two.

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