Vibrating screen with vacuum adsorption structure

Abstract

The invention relates to the technical field of vibrating screens, and provides a vibrating screen with a vacuum adsorption structure, the vibrating screen comprises a rack and a vibrating screen, the vibrating screen is provided with a vibrating frame arranged on the rack and screen meshes distributed on the vibrating frame in a multi-stage manner; the vacuum adsorption device is arranged on the vibration frame and is provided with a blanking inlet which is communicated with the last-stage screen and is used for receiving screened materials; the number of the first supporting strips is two, the heights of the first supporting strips are gradually reduced from the middle to the two ends so that transition slopes obliquely extending outwards and downwards can be formed at the tops of the first supporting strips, and after the screen cloth is pressed to the first supporting strips, the lower end face of the screen cloth can abut against the transition slopes so that an adsorption cavity can be formed between the vacuum adsorption device and the last-stage screen cloth. By means of the technical scheme, the technical problem that in the prior art, sealing between a vacuum adsorption structure and a screen mesh is affected by vibration and is prone to losing efficacy, and the drilling fluid separation treatment efficiency and quality of a vibrating screen are affected is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vibrating screens, and in particular, to a vibrating screen with a vacuum adsorption structure. Background Art

[0002] In the process of resource exploitation such as oil and natural gas, the effective treatment of drilling fluid is crucial for ensuring the smooth progress of drilling operations, improving resource exploitation efficiency, and reducing environmental pollution. Currently, vibrating screens with vacuum adsorption structures are often used for liquid phase separation of drilling fluid. The vacuum adsorption structure is mostly installed at the last-stage screen mesh and vibrates together with the vibrating screen. Since the vibrating screen needs to vibrate continuously at a high frequency during operation to enhance the separation effect of the drilling fluid, this frequent and intense vibration will cause continuous impact and wear on the sealing structure between the adsorption chamber and the screen mesh. If the sealing elements (such as rubber gaskets, sealing rings) undergo fatigue wear or displacement, resulting in local air leakage, the adsorption force will be weakened, causing light drill cuttings or viscous sludge to be unable to be effectively fixed, and the screening efficiency will be reduced. Currently, the improvement of the sealing performance of vibrating screens mainly focuses on the following directions. For example, for static seal optimization, high-elastic silicone pads or labyrinth seal structures are used. However, the screen is usually installed on the vibrating frame by pressing the two ends of the screen, and the sealing components near the middle of the screen are prone to deformation and loosening, making it difficult to ensure the sealing performance between the adsorption chamber and the screen. Or rigid connection reinforcement is carried out to improve the connection strength by increasing the number of bolts or ribs, but this will increase the structural weight, exacerbate the vibration inertia, and instead accelerate the wear of the sealing interface. At the same time, after the sealing structure fails, the workload of replacing the relevant sealing structure is increased, which is not convenient for maintenance. There are also some vibrating screens with adsorption functions that adopt a split chamber design for the adsorption chamber, that is, separating the adsorption chamber from the screen to reduce vibration interference, but this will lead to uneven negative pressure distribution and fluctuating adsorption effects. Once the seal fails, the vacuum adsorption function will be greatly weakened, and it is difficult to detect in time after the seal fails, reducing the efficiency and quality of liquid phase separation of drilling fluid. Summary of the Invention

[0003] To overcome the above defects, the present invention provides a vibrating screen with a vacuum adsorption structure, which solves the technical problem that the seal between the vacuum adsorption structure and the screen in the related art is prone to failure, affecting the efficiency and quality of the vibrating screen for separating and treating drilling fluid.

[0004] According to one aspect, at least one embodiment of the present invention provides a vibrating screen with a vacuum adsorption structure, including: A frame; A vibrating screen, the vibrating screen having a vibrating frame provided on the frame and a multi-stage distributed screen mesh arranged on the vibrating frame; A vacuum adsorption device, which is arranged on the vibrating frame and located below the screen mesh. The vacuum adsorption device has a blanking inlet that communicates with the last-stage screen mesh and is used to receive the screened materials. There are two first support bars, and the two first support bars are respectively arranged on both side edges of the blanking inlet along the transverse direction of the vibrating frame. The height of the first support bar gradually decreases from the middle to both ends to form a transition slope that extends obliquely downward and outward at the top of the first support bar. After the screen mesh presses against the first support bar, the lower end surface of the screen mesh can be in contact with the transition slope, so as to form an adsorption cavity between the vacuum adsorption device and the last-stage screen mesh.

[0005] For example, in a vibrating screen with a vacuum adsorption structure provided by at least one embodiment of the present invention, it further includes: There are two second support bars, and the two second support bars are respectively arranged on both side edges of the blanking inlet along the longitudinal direction of the vibrating frame and are used to be in contact with the lower end surface of the screen mesh.

[0006] For example, in a vibrating screen with a vacuum adsorption structure provided by at least one embodiment of the present invention, the upper end surface of the second support bar is a plane, and the top surface of the second support bar is lower than the lowest point of the top surface of the first support bar.

[0007] For example, in a vibrating screen with a vacuum adsorption structure provided by at least one embodiment of the present invention, a plurality of first insertion openings are spaced apart on the edge of the blanking inlet, and the second support bar has a plugging flange that is plugged into the first insertion opening.

[0008] For example, in a vibrating screen with a vacuum adsorption structure provided by at least one embodiment of the present invention, the vacuum adsorption device further includes a support member arranged in the middle of the transverse direction of the blanking inlet. The support member extends longitudinally, and the upper end surface of the support member is used to be in contact with the lower end surface of the screen mesh.

[0009] For example, in a vibrating screen with a vacuum adsorption structure provided by at least one embodiment of the present invention, the support member includes: The support member includes: A support rod body, which is arranged in the middle of the transverse direction of the blanking inlet. The upper end surface of the support rod body has a second insertion opening; A third support bar, and the third support bar is provided with a plugging flange that is plugged into the second insertion opening. The upper end surface of the third support bar is used to be in contact with the lower end surface of the screen mesh.

[0010] For example, in a vibrating screen with a vacuum adsorption structure provided by at least one embodiment of the present invention, The vacuum adsorption device includes: A collecting hopper, the collecting hopper is arranged on the vibrating frame, and the material falling inlet is located at the upper end of the collecting hopper; A ventilation pipe, the ventilation pipe is installed on the vibrating frame, and one end of the ventilation pipe is communicated with the collecting hopper; A follow-up pipe, one end of the follow-up pipe is communicated with the ventilation pipe, and the other end is used for communicating with an external air source.

[0011] For example, in a vibrating screen with a vacuum adsorption structure provided by at least one embodiment of the present invention, the follow-up pipe includes a flexible pipe and quick-release joints connected to both ends of the flexible pipe. One of the quick-release joints is used for communicating with the ventilation pipe, and the other quick-release joint is used for being installed on the frame and communicating with an external air source.

[0012] For example, in a vibrating screen with a vacuum adsorption structure provided by at least one embodiment of the present invention, the vibrating frame has a connection end rotatably connected to the frame and a swinging end connected to the connection end. The connection end and the swinging end can swing vertically synchronously relative to the frame. The vacuum adsorption device is located at the swinging end. An adjusting device is arranged between the frame and the vibrating frame, and the adjusting device is used for adjusting the swinging amplitude of the swinging end.

[0013] For example, in a vibrating screen with a vacuum adsorption structure provided by at least one embodiment of the present invention, The adjusting device includes: A guiding cylinder, the guiding cylinder is vertically arranged on the frame; A supporting cylinder, the supporting cylinder is arranged to be lifted and lowered in the guiding cylinder, and the supporting cylinder is used for supporting the vibrating frame; A driving member, the driving member is arranged on the frame, and the driving member is in transmission connection with the supporting cylinder for driving the supporting cylinder to lift and lower.

[0014] The beneficial effects of the present invention are as follows: In the present invention, the structural design that the middle part of the first support bar gradually decreases in height from both ends forms transition inclined planes on both sides. After the two ends of the screen mesh in the transverse direction are pressed tightly, the lower end surface abuts against the transition inclined plane to form an inclined plane sealing structure. This structure always generates a continuous pressing force between the screen mesh and the transition inclined plane in the face of the inertial force of the screen mesh during vibration, thereby effectively resisting the impact of vibration on the sealing interface, solving the problem in the prior art that it is difficult to ensure the sealing performance between the adsorption chamber and the screen mesh due to frequent vibration. The equipment maintenance cost is reduced. At the same time, the inclined plane sealing structure forms a dynamic sealing balance during vibration, ensuring that the adsorption chamber can still maintain reliable sealing performance in a long-term high-frequency vibration environment, ensuring the efficient operation of the vacuum adsorption device, thereby improving the efficiency and quality of the liquid phase separation of the drilling fluid and reducing the resource waste and environmental pollution caused by liquid phase leakage. Brief Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some exemplary embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the exemplary embodiments of the present invention and these drawings.

[0016] Figure 1 Schematic diagram of the overall structure of the vibrating screen in an embodiment of the present invention; Figure 2 For Figure 1 Schematic diagram of the cooperation structure of the screen mesh and the vacuum adsorption device in the embodiment of Figure 3 Schematic diagram of the structure of the first support bar of the present invention; Figure 4 Schematic diagram of the cooperation structure of the vacuum adsorption device, the first support bar, the second support bar and the support member of the present invention; Figure 5 Schematic diagram of the partial structure cross-section of the present invention; Figure 6 For the present invention Figure 5 Enlarged schematic diagram at position A in Figure 7 Schematic diagram of the structure of the vacuum adsorption device of the present invention; Figure 8 For the present invention Figure 7 Enlarged schematic diagram at position B in Figure 9 For the present invention Figure 1 Enlarged schematic diagram at position C in

[0017] In the figure: 1, frame; 2, vibrating screen; 21, vibrating frame; 211, connecting end; 212, swinging end; 22, screen mesh; 3, vacuum adsorption device; 31, collecting hopper; 311, material dropping inlet; 312, first socket; 32, ventilation pipe; 33, follower pipe; 331, flexible pipe; 332, quick-release joint; 4, first support bar; 41, transition inclined surface; 5, second support bar; 6, support member; 61, support rod body; 611, second socket; 62, third support bar; 7, adjusting device; 71, guiding cylinder; 72, support cylinder. Detailed Description of the Embodiments The following will further elaborate on the present invention in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention.

[0018] To simplify the drawings, only the parts related to the disclosure are schematically shown in each figure, and they do not represent the actual structure of the product. Additionally, to simplify the drawings for easier understanding, for components with the same structure or function in some figures, only one of them is schematically shown, or only one of them is labeled. In this text, "one" not only means "only this one", but also can mean "more than one", and "several" includes "two" and "more than two".

[0019] In this text, it should be noted that unless otherwise clearly specified and defined, the terms "install", "connect", and "link" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0020] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature can include the direct contact between the first and second features, or can also include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or just indicating that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or just indicating that the first feature is at a lower horizontal height than the second feature.

[0021] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention.

[0022] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0023] Such as Figures 1 to 9As shown, it shows a vibrating screen with a vacuum adsorption structure in an embodiment of the present invention. The frame 1 serves as the basic support structure. The vibrating screen 2 has a vibrating frame 21 and a screen mesh 22. An elastic member is connected between the vibrating frame 21 and the frame 1. Through the vibration generated by the vibrating motor, the vibrating frame 21 can drive the screen mesh 22 to vibrate on the frame 1 together. The width direction of the vibrating frame 21 is defined as the transverse direction, the direction perpendicular to the transverse direction in the horizontal plane is the longitudinal direction, and the direction perpendicular to the horizontal plane is the vertical direction. Multiple screen meshes 22 are arranged along the material separation direction inside the vibrating frame 21. Each level of screen mesh 22 is distributed and arranged along the longitudinal and vertical directions of the vibrating frame 21 and is pressed on the support structure of the vibrating frame 21 by a pressing device. After the pressing device is loosened, it is convenient to replace the screen mesh 22 that cannot meet the separation requirements. The vacuum adsorption device 3 is installed on the vibrating frame 21. A material falling inlet 311 is provided at one end close to the screen mesh 22. The material falling inlet 311 corresponds to the last level of screen mesh 22 in the vertical direction to achieve their connection. After the vacuum adsorption device 3 is installed on the vibrating frame 21, it also serves as the support structure of the last level of screen mesh 22 at the same time. The first support bar 4 is fixed along the transverse direction of the vibrating frame 21 at the end of the material falling inlet 311. Its cross-sectional shape is a symmetric structure with a higher middle and lower ends. A continuous height decrease is formed from the middle to both ends to form transition inclined surfaces 41 on both sides. Both ends of the screen mesh 22 along the transverse direction are pressed towards the end of the material falling inlet 311 by pressing components, so that the lower end surface of the screen mesh 22 is in close contact with the transition inclined surface 41. When the vibrating frame 21 vibrates driven by the power device, the screen mesh 22 vibrates synchronously with the vibrating frame 21. Both ends of the screen mesh 22 along the transverse direction can always be in contact with the end of the material falling inlet 311 due to the action of the pressing components. After both ends of the screen mesh 22 are pressed, slight deformation will occur, causing the middle part of the screen mesh 22 along the transverse direction to have a tendency to bulge upwards. And both sides of the first support bar have transition inclined surfaces 41 with gradually decreasing heights towards both ends. Through the height change of the transition inclined surfaces 41, the lower end surface of the screen mesh 22 is always kept in contact with the transition inclined surfaces 41, so as to form an adsorption cavity between the material falling inlet 311 area of the vacuum adsorption device 3 and the last level of screen mesh 22. The external vacuum source is connected to the vacuum adsorption device 3 to form a negative pressure in the adsorption cavity, prompting the liquid phase in the drilling fluid to pass through the screen mesh 22 and enter the adsorption cavity, while the solid phase is discharged along the surface of the screen mesh 22. The first support bar 4 can be made of flexible materials such as rubber, so that it has a tendency to reset after being pressed, enabling the first support bar 4 to adapt to the slight deformation of the screen mesh 22 and always pressing against the lower end surface of the screen mesh 22, ensuring that a relatively closed adsorption cavity can be formed between the vacuum adsorption device 3 and the screen mesh 22, and avoiding affecting the separation effect of the drilling fluid due to air leakage.

[0024] In this embodiment, the middle part of the first support bar 4 is designed such that the height gradually decreases from the middle to both ends, forming transition inclined surfaces 41 on both sides. After the two ends of the screen 22 in the transverse direction are pressed, the lower end surface abuts against the transition inclined surfaces 41, forming an inclined surface sealing structure. This structure always generates a continuous pressing force between the screen 22 and the transition inclined surfaces 41 in the face of the inertial force of the screen 22 during the vibration process, thereby effectively resisting the impact of vibration on the sealing interface, solving the problem in the prior art that it is difficult to ensure the sealing performance between the adsorption chamber and the screen due to frequent vibration, reducing the equipment maintenance cost. At the same time, the inclined surface sealing structure forms a dynamic sealing balance during the vibration process, ensuring that the adsorption chamber can still maintain reliable sealing performance in a long-term high-frequency vibration environment, guaranteeing the efficient operation of the vacuum adsorption device 3, and further improving the efficiency and quality of the liquid phase separation of the drilling fluid, and reducing the waste of resources and environmental pollution caused by liquid phase leakage.

[0025] Further, referring to Figure 4 、 Figure 5 , a second support bar 5 is provided at the longitudinal end of the blanking inlet 311. The second support bar 5 extends longitudinally along the vibration frame 21, and its two ends are fixedly connected to the corresponding ends of the first support bar 4, forming a rectangular support boundary around the blanking inlet 311. The upper end surface of the second support bar 5 directly abuts against the lower end surface of the screen 22, and its longitudinal length covers the longitudinal width of the blanking inlet 311. When the screen 22 vibrates with the vibration frame 21, the second support bar 5 cooperates with the transverse inclined surface abutting structure of the first support bar 4 to vibrate synchronously with the screen 22 in two orthogonal directions. The second support bar 5 can be made of the same flexible material as the first support bar to ensure stable contact of the surrounding sealing boundary of the adsorption chamber during the vibration process. This multi-directional support design avoids warping or offset of the screen 22 caused by insufficient single-directional support. Especially in a high-frequency vibration environment, through the synergistic effect of the dynamic pressing force of the transverse inclined surface and the supporting force of the longitudinal plane, the overall stability of the adsorption chamber sealing interface is significantly improved, reducing the risk of sealing failure caused by screen displacement, and further enhancing the sealing reliability of the device under complex vibration conditions. On this basis, the shapes of the second support bar 5 and the first support bar 4 are different. The upper end surface of the second support bar 5 is processed into a plane parallel to the screen 22, and this plane directly fits with the lower end surface of the screen 22, forming a plane support area. The thickness of the second support bar 5 (i.e., the height in the vertical direction) is less than the thickness of both ends of the first support bar 4, that is, less than the minimum thickness of the first support bar 4. After the pressing member presses the two ends of the screen 22, the deformation generated by the first support bar 4 is greater than the deformation generated by the second support bar 5. When there is no pressing member above the first support bar 4, the reliability of the seal can still be ensured between the screen 22 and the transition inclined surface 41 of the first support bar 4, so that the pressing members are distributed at the transverse ends of the screen 22, avoiding the influence of the pressing members on the flow of the drilling fluid above the screen. The planar support of the second support bar 5 and the inclined-plane seal of the first support bar 4 form a functional division of labor: the inclined-plane structure bears the main sealing load, the planar structure is convenient for processing, and at the same time, due to the presence of the pressing component, the sealing performance will not be affected. The thickness-difference design ensures that the pressure at the sealing interface is concentrated on the transition inclined planes 41 at both ends of the screen, and the dynamic pressing characteristics of the inclined planes are used to ensure the sealing performance and prevent the increase of the sealing gap caused by the deformation of the screen 22. This structure realizes the optimal balance between the support strength and the sealing performance without increasing the complexity of the sealing components, and effectively extends the service life of the screen 22 and the support structure. Refer to Figure 4 , a plurality of first insertion interfaces 312 are spaced apart from the end edge of the blanking inlet 311. The top of the blanking inlet 311 is enclosed by square steel. The first insertion interface 312 is a rectangular slot hole penetrating the top wall of the square steel. The lower ends of the first support bar 4 and the second support bar 5 are provided with insertion flanges matching the first insertion interface 312, and the size of the first insertion interface 312 is adapted to the cross section of the insertion flange. The support bar is pre-positioned by inserting the flange into the insertion interface. When the vibrating screen 2 works, the first support bar 4 and the second support bar 5 are pressed between the square steel structure of the blanking inlet 311 and the screen. This insertion structure allows the support bar to be quickly installed and disassembled along the edge of the blanking inlet 311, and ensures the connection stiffness between the support bar and the vacuum adsorption device 3. The insertion fit between the first insertion interface 312 and the support bar realizes modular installation, avoids the complex processes of traditional welding or full bolt connection, and significantly improves the equipment maintenance efficiency. The spaced-apart insertion interfaces enhance the connection strength between the support bar and the vacuum adsorption device 3, enabling the alternating load generated during the vibration process to be evenly transmitted through the insertion interface and reducing local stress concentration. At the same time, the detachable support bar structure is convenient for replacement and maintenance, reduces the time cost of daily maintenance, is especially suitable for the rapid disassembly and assembly requirements of equipment at the drilling site, and improves the engineering practicability of the device. A support member 6 is further provided at the middle part of the blanking inlet 311 along the transverse direction. The support member 6 includes a support rod body 61 fixed to the inner wall of the vacuum adsorption device 3, and a second insertion interface 611 is provided on its upper end surface. This insertion interface is a groove structure extending longitudinally. A third support bar 62 is inserted into the second insertion interface 611, and its upper end surface abuts against the middle area of the lower end surface of the screen 22 to form a support point for the middle part of the screen 22. The height of the support rod body 61 is adapted to the middle height of the first support bar 4, so that the upper end surface of the third support bar 62 is kept in contact with the lower end surface of the screen 22. The support member 6 is provided at the middle part of the screen 22 to form a third support point, which together with the first support bars 4 on both sides constitutes a three-point support structure, effectively dispersing the load borne by the screen 22 during the vibration process and preventing fatigue fracture of the middle part of the screen 22 due to long-term vibration. The third support bar 62 is connected to the support rod body 61 by an insertion method, and the insertion depth can be adjusted according to the specifications of the screen 22, enhancing the adaptability of the device to different types of screens.

[0026] Furthermore, on this basis, the support rod body 61 has a prismatic structure and is longitudinally fixed at the middle position of the blanking inlet 311. The second socket 611 is a long slot opened on the upper end surface of the support rod body 61. A convex portion adapted to the long slot is provided at the lower end of the third support bar 62, and the third support bar 62 is limited and installed by inserting the convex portion into the long slot. The upper end surface of the third support bar 62 can be processed into a plane, which contacts the lower end surface of the screen mesh 22. Its length direction is perpendicular to the transverse direction of the vibrating frame 21, covering the main stress area in the middle of the screen mesh 22. The plug-in structure ensures the double limit of the third support bar 62 in the transverse and longitudinal directions. The plane support surface design enables the middle part of the screen mesh 22 to obtain stable rigid support. Combined with the inclined surface abutment of the first support bars 4 on both sides, a composite structure of "sealing with inclined surfaces on both sides + planar support in the middle" is formed, significantly improving the overall anti-vibration performance of the screen mesh. This structure is particularly suitable for the sealing support of large-size screen meshes. Through the modular plug-in design, different specifications of screen meshes can be compatible without changing the main structure, enhancing the versatility and engineering applicability of the device. Refer to Figure 7 、 Figure 8, the vacuum adsorption device 3 includes a collecting hopper 31, a ventilation pipe 32 and a follower pipe 33. The collecting hopper 31 is fixed to the vibrating frame 21, and the blanking inlet 311 is located at the upper end of the collecting hopper 31 and communicates with the last-stage screen 22. One end of the ventilation pipe 32 is connected to the ventilation hole on the side wall of the collecting hopper 31 through a flange, and the other end extends to the fixed area of the vibrating frame 21. One end of the follower pipe 33 is connected to the ventilation pipe 32, and the other end is connected to an external vacuum source. Its length is sufficient to adapt to the swing amplitude of the vibrating frame 21 and allows free bending during vibration without affecting the pipeline connection. The combined design of the ventilation pipe 32 and the follower pipe 33 ensures that the vacuum adsorption device 3 continuously obtains a stable negative pressure source during vibration. The flexible characteristic of the follower pipe 33 absorbs the swing displacement of the vibrating frame 21, avoids pipeline fatigue damage caused by rigid connection, and ensures the long-term reliable operation of the vacuum system. The direct connection design between the collecting hopper 31 and the screen 22 reduces the liquid-phase flow resistance, enables the vacuum adsorption force to directly act on the surface of the screen, and improves the liquid-phase separation efficiency. This vacuum pipeline structure ensures the stability of the negative pressure in the adsorption cavity while meeting the requirements of the vibration working condition, provides continuous pressure assistance for the sealing interface, and further enhances the sealing effect. On this basis, the follower pipe 33 includes a flexible pipe 331 and quick-release joints 332 at both ends. The flexible pipe 331 is a bendable tubular member, and its inner diameter is consistent with the interface dimensions of the ventilation pipe 32 and the quick-release joints 332. The quick-release joints 332 can adopt a snap connection structure or a screw connection structure. One quick-release joint 332 is fixed to the end of the ventilation pipe 32, and the other is fixed to the vacuum interface on the frame 1 to achieve the quick installation and disassembly of the follower pipe 33. This structure allows the follower pipe 33 to be replaced without using tools. The combination of the quick-release joints 332 and the flexible pipe 331 enables the quick maintenance and replacement of the vacuum pipeline, meeting the requirements of efficient equipment maintenance at the drilling site. The ventilation pipe 32 can adopt a rigid pipe, and a connecting piece is used to connect it to the vibrating frame 21. During the operation of the vibrating screen 2, the ventilation pipe 32 moves with the vibrating screen, and the displacement change generated by the vibration of the vibrating screen 2 is adapted through the follower pipe 22. That is, the bendability of the flexible pipe 331 enables the follower pipe 33 to adapt to any swing angle of the vibrating frame 21, eliminating the fracture risk caused by stress concentration in traditional rigid pipelines and the risk of easy damage to single flexible pipelines, and improving the reliability and service life of the vacuum system. Refer to Figure 1, one end of the vibration frame 21 forms a connection end 211 through a hinge shaft and is hinged to the frame 1, and the other end is a swing end 212. The vacuum adsorption device 3 is fixed below the swing end 212. The adjusting device 7 between the frame 1 and the vibration frame 21 includes a vertically arranged guide cylinder 71, inside which a support cylinder 72 is slidably sleeved. The upper end of the support cylinder 72 contacts the vibration frame 21 through an elastic member. The driving member can be a telescopic device arranged inside the frame 1, such as a small air cylinder, a hydraulic cylinder, etc., and directly drives the lifting of the support cylinder 72 through the telescopic movement of the driving member. Since the vibration frame 21 and the support cylinder 72 are not directly connected but are connected through an elastic member, during the lifting process of the support cylinder 72, relative longitudinal movement between the support cylinder 72 and the vibration frame 21 is allowed. Therefore, during the swinging process of the vibration frame 21, no movement interference will occur. The driving member can also adopt a rotational driving member, and the rotational driving member can cooperate with a lead screw-nut structure. The support cylinder 72 is connected to the nut, and the rotation of the lead screw driven by the rotational driving member can be converted into the lifting of the nut. Further, the driving member can also be a rotating handle arranged parallel and spaced apart from the guide cylinder. The rotating handle cooperates with a bevel gear set for commutation and a lead screw-nut structure. When the rotating handle rotates, the bevel gear set transmits the power to the lead screw-nut, thereby converting the rotation of the rotating handle into the lifting of the nut. The nut is connected to the support cylinder 72 and drives the lifting of the support cylinder 72. This arrangement is convenient to operate and is more suitable for on-site maintenance and use. The adjusting device 7 allows the working slope of the screen 22 to be adjusted by changing the inclination angle of the vibration frame 21 to adapt to the separation requirements of drilling fluids with different viscosities and solid contents. When treating high-viscosity drilling fluids, increasing the inclination angle can accelerate the material flow rate and improve the separation efficiency; when treating low-viscosity liquids, reducing the inclination angle can extend the adsorption time and increase the liquid phase recovery rate. The sliding fit between the guide cylinder 71 and the support cylinder 72 ensures the smoothness of the adjustment process. At the same time, during non-working hours, by setting the adjusting device 7 to increase the distance between the swing end 212 and the frame 1, it is convenient to repair the vacuum adsorption device 3, such as whether the ventilation pipe 32 and the follower pipe 33 are damaged. It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A vibrating screen with a vacuum adsorption structure, characterized in that, Comprising: Frame (1); Vibrating screen (2), the vibrating screen (2) having a vibrating frame (21) provided on the frame (1) and a screen mesh (22) arranged in multiple levels on the vibrating frame (21); Vacuum adsorption device (3), the vacuum adsorption device (3) being provided on the vibrating frame (21) and below the screen mesh (22), the vacuum adsorption device (3) having a blanking inlet (311) communicating with the last-stage screen mesh (22) and for receiving the screened material; First support bars (4), there are two of them, both of the two first support bars (4) are correspondingly arranged along the transverse direction of the vibrating frame (21) on both side edges of the blanking inlet (311), the first support bars (4) gradually decrease in height from the middle to both ends to form a transition inclined surface (41) extending obliquely downward and outward at the top of the first support bars (4). After the screen mesh (22) presses against the first support bars (4), the lower end surface of the screen mesh (22) can abut against the transition inclined surface (41) so as to form an adsorption cavity between the vacuum adsorption device (3) and the last-stage screen mesh (22).

2. The vibrating screen with a vacuum adsorption structure according to claim 1, characterized in that, Further comprising: Second support bars (5), there are two of them, both of the two second support bars (5) are correspondingly arranged along the longitudinal direction of the vibrating frame (21) on both side edges of the blanking inlet (311) for abutting against the lower end surface of the screen mesh (22).

3. The vibrating screen with a vacuum adsorption structure according to claim 2, characterized in that, The upper end surface of the second support bar (5) is a plane, and the top surface of the second support bar (5) is lower than the lowest point of the top surface of the first support bar (4).

4. The vibrating screen with a vacuum adsorption structure according to any one of claims 2 to 3, characterized in that, A plurality of first insertion openings (312) are spaced apart on the edge of the blanking inlet (311), and the second support bar (5) has a plugging flange plugged into the first insertion opening (312).

5. The vibrating screen with a vacuum adsorption structure according to any one of claims 1 to 3, characterized in that, The vacuum adsorption device (3) further includes a support member (6) arranged at the transverse middle of the blanking inlet (311), the support member (6) extends longitudinally, and the upper end surface of the support member (6) is for abutting against the lower end surface of the screen mesh (22).

6. The vibrating screen with a vacuum adsorption structure according to claim 5, characterized in that, The support member (6) includes: Support rod body (61), the support rod body (61) is arranged at the transverse middle of the blanking inlet (311), and the upper end surface of the support rod body (61) has a second insertion opening (611); Third support bar (62), the third support bar (62) is provided with a plugging flange plugged into the second insertion opening (611), and the upper end surface of the third support bar (62) is for abutting against the lower end surface of the screen mesh (22).

7. The vibrating screen with a vacuum adsorption structure according to claim 1, characterized in that, The vacuum adsorption device (3) includes: Collection hopper (31), the collection hopper (31) is arranged on the vibrating frame (21), and the blanking inlet (311) is located at the upper end of the collection hopper (31); Vent pipe (32), the vent pipe (32) is installed on the vibrating frame (21), and one end of the vent pipe (32) communicates with the collection hopper (31); Follow-up pipe (33), one end of the follow-up pipe (33) communicates with the vent pipe (32), and the other end is for communicating with an external air source.

8. The vibrating screen with a vacuum adsorption structure according to claim 7, characterized in that, The follower pipe (33) includes a flexible pipe (331) and quick-release joints (332) connected to both ends of the flexible pipe (331). One of the quick-release joints (332) is used to communicate with the ventilation pipe (32), and the other quick-release joint (332) is used to be installed on the frame (1) and communicate with an external air source.

9. The vibrating screen with a vacuum adsorption structure according to any one of claims 1 to 3 and 7 to 8, characterized in that, The vibrating frame (21) has a connection end (211) rotatably connected to the frame (1) and a swinging end (212) connected to the connection end (211). The connection end (211) and the swinging end (212) can swing vertically synchronously relative to the frame (1). The vacuum adsorption device (3) is located at the swinging end (212). An adjusting device (7) is provided between the frame (1) and the vibrating frame (21), and the adjusting device (7) is used to adjust the swinging amplitude of the swinging end (212).

10. The vibrating screen with a vacuum adsorption structure according to claim 9, characterized in that, The adjusting device (7) includes: A guiding cylinder (71) vertically arranged on the frame (1); A supporting cylinder (72) arranged to be lifted and lowered within the guiding cylinder (71), and the supporting cylinder (72) is used to support the vibrating frame (21); A driving member arranged on the frame (1), and the driving member is in transmission connection with the supporting cylinder (72) and is used to drive the supporting cylinder (72) to lift and lower.

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