Vibrating screen with anti-blocking function for drilling fluid treatment

Abstract

The invention relates to the technical field of drilling fluid treatment, and discloses a drilling fluid treatment vibrating screen with an anti-blocking function, the drilling fluid treatment vibrating screen comprises a screen body seat, a plurality of pressure storage cleaning assemblies are arranged in the screen body seat, and a collecting and discharging assembly is arranged on the screen body seat. The vibrating base and the screening net plate vibrate in a reciprocating mode, meanwhile, under cooperation of the pressure accumulation cleaning assembly, the air bag accumulates pressure and accumulates certain pressure, air is exhausted through the multiple air spraying heads, fine particles in the screening net plate can be blown out, and the effect of automatically removing impurities in the screening net plate is achieved; a large amount of operation time is greatly saved, the drilling efficiency is improved, meanwhile, drilling fluid is often subjected to various pollution such as mud and sand in stratums and rock chippings, the pollution of the pollutants to the drilling fluid can be reduced through the automatic impurity removing function of the drilling fluid vibrating screen, the treatment cost of the drilling fluid is reduced, and meanwhile the environment and ecology are protected.

Description

Technical Field

[0001] The invention relates to the technical field of drilling fluid treatment, in particular to a vibrating screen for drilling fluid treatment with an anti-blocking function. Background Art

[0002] Drilling fluid can be divided into clean water, mud, clay-free flushing fluid, emulsion, foam and compressed air according to its composition. Among them, clean water is the earliest drilling fluid used. It does not need to be treated and is easy to use. It is suitable for intact rock formations and areas with sufficient water resources. Mud is a widely used drilling fluid, mainly suitable for loose, fractured, prone to collapse and block falling, and unstable rock formations such as swelling and peeling when exposed to water.

[0003] After use, the drilling fluid is usually mixed with impurities such as mud and gravel. In order to ensure the reuse of the drilling fluid, a vibrating screen with a filtering effect is usually used to filter the drilling fluid.

[0004] In the patent application with application announcement number CN221557740U, it includes a drilling fluid vibrating screen body, vertical plates are arranged on both sides of the inner cavity of the drilling fluid vibrating screen body, a fixing groove is opened in the inner cavity of the vertical plate, a spring is fixedly connected to the inner cavity of the fixing groove, the right end of the spring is fixedly connected to the fixing plate, the right side of the fixing plate is fixedly connected to the fixing rod, a filter screen is arranged at the bottom of the inner cavity of the drilling fluid vibrating screen body, and mounting plates are fixedly connected to the tops of both sides of the inner cavity of the drilling fluid vibrating screen body. The advantages are: the utility model can facilitate and timely replace the filter screen through the coordinated use of the drilling fluid vibrating screen body, vertical plates, fixing grooves, springs, fixing plates, fixing rods, filter screens, mounting plates, card plates, reciprocating boxes, motors, threaded rods, threaded sleeves, reciprocating plates, flushing pipes and nozzles, and can also flush the filter screen before and after use.

[0005] In the prior art including the above-mentioned patents, the filter screen is cleaned by a nozzle, and the mesh portion of the filter screen is very easy to get stuck with fine impurities (such as gravel). It is difficult to effectively clean the fine impurities by only flushing it with a nozzle. The stuck fine impurities will hinder the normal operation of the screen, making it impossible for solid particles in the drilling fluid to pass through the sieve holes smoothly, thereby reducing the screening efficiency. At the same time, it will directly lead to an excessive content of solid particles in the drilling fluid, thereby affecting the performance of the drilling fluid. Summary of the invention

[0006] The problem to be solved by the present invention is that it is difficult to clean the fine impurities stuck inside the sieve mesh in the prior art.

[0007] In order to solve the above technical problems, the technical solution of the present invention is: a vibrating screen for drilling fluid treatment with anti-blocking function, comprising a screen body seat, a plurality of pressure storage cleaning components are arranged inside the screen body seat, a collecting and discharging component is arranged on the screen body seat, and the plurality of pressure storage cleaning components are distributed around the collecting and discharging component; A vibration seat is slidably mounted on the sieve body seat, a plurality of vibration motors are fixedly arranged between the bottom end of the vibration seat and the sieve body seat, a sieve plate is fixedly arranged on the inner wall of the vibration seat, and a feed bin is fixedly arranged on the top of the sieve body seat on one side of the sieve plate; The cam is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts. The collecting and unloading assembly includes a first porous plate fixed on the screen body seat, and the first porous plate is located below the sieve plate, a plurality of nozzles are fixedly arranged on the top of the first porous plate, and a connecting pipe is fixedly arranged between the plurality of nozzles and the plurality of air guide pipes, and the connecting pipe is located inside the first porous plate.

[0008] Preferably, an expansion chamber is provided inside the pressure accumulation cylinder below the partition. When the piston plate slides toward the partition, the second one-way valve is in an open state, the first one-way valve is in a closed state, and the third one-way valve is in an open state. When the piston plate slides toward the second one-way valve, the second one-way valve is in a closed state, the first one-way valve is in an open state, and the third one-way valve is in a closed state.

[0009] Preferably, the plurality of nozzles are distributed in a rectangular array, a plurality of first water outlet holes are provided at the top of the first porous plate, and the plurality of first water outlet holes are distributed in a rectangular array, and the plurality of first water outlet holes are staggered with the plurality of nozzles.

[0010] Preferably, a second porous plate is slidably provided below the first porous plate, and a baffle is fixedly provided at the bottom end of the second porous plate, an electric telescopic rod is fixedly provided between the baffle and the bottom end of the first porous plate, a plurality of second water outlet holes are provided on the second porous plate, a spray assembly is provided on the sieve body seat, the spray assembly comprises two pairs of support seats fixed on the sieve body seat, a self-rotating rod is fixedly provided between each pair of the support seats, a plurality of spray guns are provided on each of the self-rotating rods, a water tank is fixedly provided on each pair of the support seats, a water pump is provided on each water tank, and a water pipe is provided between the water pump and each spray gun.

[0011] Preferably, a movable groove matching the second porous plate is provided at the bottom end of the first porous plate. When the second porous plate is in the initial position, each of the second water outlets is located on one side of each first water outlet. When the electric telescopic rod drives the second porous plate to slide, each of the second water outlets is connected to each first water outlet.

[0012] Preferably, each group of the spray guns is connected to the water pump through a water pipe, a fixed plate is fixedly provided on the curved outer wall of each rotating rod, a curved telescopic rod is fixedly provided on each supporting seat, the other end of each curved telescopic rod is fixedly connected to the top of each fixed plate, and two abutment plates are fixedly provided on the top of the screening plate, and the two abutment plates are respectively located under the two pairs of fixed plates.

[0013] Preferably, a drilling fluid collecting tank is provided on the screen body seat below the second porous plate, a cleaning liquid collecting tank is provided on the screen body seat on one side of the drilling fluid collecting tank, and butterfly valves extending to the bottom of the screen body seat are provided at the bottom of the drilling fluid collecting tank and the cleaning liquid collecting tank.

[0014] Preferably, a feed port is provided at the top of the feed bin, a discharge port is provided at the bottom of the feed bin, and the discharge port is located above the sieve plate.

[0015] Compared with the prior art, the technical solution of the present invention has the following advantages: (1) The present invention starts the screening motor to make the vibration seat and the screening plate vibrate back and forth. At the same time, with the cooperation of the pressure storage cleaning component, the air bag accumulates pressure. When the pressure reaches a certain level, the air is discharged through multiple nozzles, which can blow out the fine particles inside the screening plate, thereby automatically removing impurities inside the screening plate, greatly saving a lot of operation time and improving drilling efficiency. At the same time, the drilling fluid is often polluted by various pollutants, such as mud, sand, rock debris, etc. in the formation. The automatic impurity removal function of the drilling fluid vibrating screen can reduce the pollution of these pollutants to the drilling fluid, reduce the processing cost of the drilling fluid, and also help protect the environment and ecology; (2) The present invention starts the electric telescopic rod to align the holes on the first porous plate with the holes on the second porous plate, and starts the water pump and the vibration motor at the same time. Under the cooperation of the spray assembly and the vibration seat, multiple spray guns rotate back and forth, and at the same time, cleaning liquid can be sprayed on the surface of the sieve plate, which plays a role of uniform cleaning. By uniformly flushing the sieve plate, the wear and corrosion of the surface of the sieve plate can be reduced, and the service life of the sieve can be extended. At the same time, timely removal of impurities on the sieve can also prevent the sieve from excessive wear due to blockage, further extending the service life of the sieve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the vibrating screen of the present invention; Figure 2 It is a schematic diagram of the side structure of the vibrating screen of the present invention; Figure 3 This is an exploded view of the vibrating screen structure of the present invention; Figure 4 It is a schematic diagram of the side cross-sectional structure of the vibrating screen of the present invention; Figure 5 For the present invention Figure 4 A partial enlarged view of B in the middle; Figure 6 This is a schematic diagram of the structure of the pressure storage cleaning component of the present invention; Figure 7 This is a schematic diagram of the front structure of the first porous plate of the present invention; Figure 8 It is a side cutaway perspective view of the first porous plate and the second porous plate of the present invention; Fig. 9 A side perspective view of the spray assembly of the present invention; Fig.10 For the present invention Figure 3 A partial enlarged view of middle A.

[0017] In the figure: 1, screen body seat; 11, vibration seat; 111, screen plate; 12, vibration motor; 13, feed bin; 14, drilling fluid collection tank; 15, cleaning fluid collection tank; 2. Pressure storage cleaning assembly; 21. Lower fixing rod; 211. Piston plate; 212. First one-way valve; 22. Pressure storage cylinder; 221. Second one-way valve; 222. Partition plate; 223. Third one-way valve; 224. Air bag; 225. Pressure relief valve; 23. Air guide tube; 231. Injection nozzle; 3. Collecting and unloading assembly; 31. First porous plate; 311. First water outlet; 32. Second porous plate; 321. Second water outlet; 33. Electric telescopic rod; 4. Spray assembly; 41. Support seat; 42. Rotation rod; 421. Fixed plate; 43. Spray gun; 44. Arc-shaped telescopic rod; 45. Water tank; 46. Water guide pipe; 47. Abutment plate. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0019] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. "Include" or "comprise" and other similar words used in the present disclosure mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] like Figures 1 to 10 As shown, the present invention provides a vibrating screen for drilling fluid treatment with anti-blocking function, comprising a screen body seat 1, a plurality of pressure storage cleaning components 2 are arranged inside the screen body seat 1, a collecting and discharging component 3 is arranged on the screen body seat 1, and the plurality of pressure storage cleaning components 2 are distributed around the collecting and discharging component 3; A vibration seat 11 is slidably mounted on the sieve seat 1, a plurality of vibration motors 12 are fixedly mounted between the bottom of the vibration seat 11 and the sieve seat 1, a sieve plate 111 is fixedly mounted on the inner wall of the vibration seat 11, and a feed bin 13 is fixedly mounted on the top of the sieve seat 1 on one side of the sieve plate 111; Each pressure storage cleaning assembly 2 includes a lower fixed rod 21 fixed to the bottom end of the vibration seat 11, a pressure storage cylinder 22 slidably connected to the lower fixed rod 21 is fixedly arranged on the sieve body seat 1, an air inlet hole is opened on the pressure storage cylinder 22, and a second one-way valve 221 is fixedly arranged inside the air inlet hole, a piston plate 211 is fixedly arranged at the bottom end of the lower fixed rod 21, a first one-way valve 212 is fixedly arranged on the piston plate 211 to penetrate below it, a partition 222 is fixedly arranged on the inner wall of the pressure storage cylinder 22 below the piston plate 211, a third one-way valve 223 is fixedly arranged on the partition 222 to penetrate below it, an air bag 224 is fixed between the bottom end of the partition 222 and the inner wall of the pressure storage cylinder 22, an air outlet hole is opened at the bottom end of the pressure storage cylinder 22, and a pressure relief valve 225 is arranged inside the air outlet hole, and an air guide pipe 23 connected with the air outlet hole is fixedly arranged at the bottom end of the pressure storage cylinder 22; The collecting and unloading assembly 3 includes a first porous plate 31 fixed on the sieve body seat 1, and the first porous plate 31 is located below the sieve plate 111, and a plurality of nozzles 231 are fixedly arranged on the top of the first porous plate 31, and a connecting pipe is fixedly arranged between the plurality of nozzles 231 and the plurality of air guide pipes 23, and the connecting pipe is located inside the first porous plate 31.

[0021] An expansion chamber is provided inside the pressure accumulator cylinder 22 below the partition 222. When the piston plate 211 slides toward the partition 222, the second one-way valve 221 is in an open state, the first one-way valve 212 is in a closed state, and the third one-way valve 223 is in an open state. When the piston plate 211 slides toward the second one-way valve 221, the second one-way valve 221 is in a closed state, the first one-way valve 212 is in an open state, and the third one-way valve 223 is in a closed state.

[0022] The multiple jet heads 231 are distributed in a rectangular array. The top of the first porous plate 31 is provided with multiple first water outlet holes 311 . The multiple first water outlet holes 311 are distributed in a rectangular array. The multiple first water outlet holes 311 are staggered with the multiple jet heads 231 .

[0023] A feed port is disposed at the top of the feed bin 13 , and a discharge port is disposed at the bottom of the feed bin 13 , and the discharge port is located above the sieve plate 111 .

[0024] When the drilling fluid is screened, the drilling fluid can be fed through a feeding port provided at the top of the feeding bin 13 by a conveying device (e.g., a conveyor belt), and then the drilling fluid falls onto the screening plate 111 through a discharging port provided below the feeding bin 13, and then a plurality of vibration motors 12 are started to drive the screening plate 111 to vibrate, so that the liquid part of the drilling fluid can be filtered. Since the above belongs to the prior art, it will not be elaborated here. When the sieve plate 111 is screening the drilling fluid, the liquid part of the drilling fluid passes through the sieve plate 111 and falls to the top of the first porous plate 31, and the fine particles in the drilling fluid before screening will be stuck in the internal gap of the sieve plate 111. In the process of the sieve plate 111 screening the drilling fluid, the vibrating seat 11 fixedly connected to the sieve plate 111 reciprocates inside the sieve body seat 1, and the multiple lower fixed rods 21 fixed at the bottom of the vibrating seat 11 can reciprocate with the vibrating seat 11, thereby driving the lower fixed rods 21 fixed at the bottom of the lower fixed rods 21 to move the drilling fluid back and forth. The piston plate 211 slides back and forth up and down. During this process, when the piston plate 211 slides toward the second one-way valve 221, the air pressure inside the pressure accumulator 22 above the piston plate 211 increases, causing the first one-way valve 212 to open. At this time, the second one-way valve 221 is in a closed state, and the air pressure inside the pressure accumulator 22 below the piston plate 211 decreases. The air above the piston plate 211 enters below the piston plate 211 through the first one-way valve 212, and the third one-way valve 223 is in a closed state. When the piston plate 211 slides toward the partition plate 222, the air pressure inside the pressure accumulator 22 above the piston plate 211 decreases, causing the second one-way valve 221 to open. At this time, the first one-way valve 212 is closed, and the air pressure inside the pressure accumulator 22 below the piston plate 211 increases, causing the third one-way valve 223 to open, thereby allowing the air inside the pressure accumulator 22 below the piston plate 211 to enter the airbag 224. As the piston plate 211 slides back and forth repeatedly, the airbag 224 can continue to expand. When the airbag 224 is in close contact with the inner wall of the expansion chamber, the air pressure inside the airbag 224 continues to increase, causing the pressure relief valve 225 to open automatically. At the same time, under the elastic force of the airbag 224, the air inside the airbag 224 can enter the connecting pipe through the air guide tube 23, and then be discharged through the multiple nozzles 231 on the first porous plate 31, which can blow out the fine particles inside the sieve plate 111, thereby automatically removing impurities inside the sieve plate 111, greatly saving a lot of operation time and improving drilling efficiency.

[0025] A second porous plate 32 slides below the first porous plate 31, and a baffle is fixedly provided at the bottom end of the second porous plate 32, an electric telescopic rod 33 is fixedly provided between the baffle and the bottom end of the first porous plate 31, a plurality of second water outlet holes 321 are opened on the second porous plate 32, a spray assembly 4 is provided on the sieve body seat 1, the spray assembly 4 includes two pairs of support seats 41 fixed on the sieve body seat 1, a self-rotating rod 42 is fixedly provided between each pair of support seats 41, a plurality of spray guns 43 are provided on each self-rotating rod 42, a water tank 45 is fixedly provided on each pair of support seats 41, a water pump is provided on each water tank 45, and a water pipe 46 is provided between the water pump and each spray gun 43.

[0026] A movable groove matching the second porous plate 32 is provided at the bottom end of the first porous plate 31. When the second porous plate 32 is in the initial position, each second water outlet hole 321 is located on one side of each first water outlet hole 311. When the electric telescopic rod 33 drives the second porous plate 32 to slide, each second water outlet hole 321 is connected to each first water outlet hole 311.

[0027] Each group of spray guns 43 is connected to the water pump through a water pipe 46, a fixed plate 421 is fixedly provided on the curved outer wall of each rotating rod 42, a curved telescopic rod 44 is fixedly provided on each supporting seat 41, and the other end of each curved telescopic rod 44 is fixedly connected to the top of each fixed plate 421, and two abutment plates 47 are fixedly provided on the top of the sieve plate 111, and the two abutment plates 47 are respectively located under the two pairs of fixed plates 421.

[0028] A drilling fluid collecting tank 14 is provided on the sieve body seat 1 below the second porous plate 32, and a cleaning liquid collecting tank 15 is provided on the sieve body seat 1 on one side of the drilling fluid collecting tank 14. The bottom ends of the drilling fluid collecting tank 14 and the cleaning liquid collecting tank 15 are both provided with butterfly valves extending to the bottom of the sieve body seat 1, and cleaning liquid is provided inside the water tank 45.

[0029] When it is necessary to clean the sieve plate 111, the electric telescopic rod 33 can be started to push the second porous plate 32 fixedly connected to the end of the electric telescopic rod 33 to slide on the bottom end of the first porous plate 31, and the second water outlet hole 321 provided on the second porous plate 32 is in a coaxial position with the first water outlet hole 311. At this time, the water pump can be started to allow the cleaning liquid in the water tank 45 to enter the spray gun 43 through the water guide pipe 46 and be sprayed out through the spray gun 43. At this time, the plurality of vibration motors 12 are started to make the sieve plate 111 reciprocate up and down, thereby driving the back plate 47 fixed on the sieve plate 111 to reciprocate up and down. When the top of the back plate 47 contacts the bottom ends of the two fixed plates 421, it can push the back plate 47 to contact the fixed plates 421. The rotating rod 42 fixedly connected to the fixed plate 421 rotates around the connection position with the support seat 41, and the fixed plate 421 at this time performs a circular motion. At the same time, the circular motion of the fixed plate 421 can compress the arc-shaped telescopic rod 44. When the top of the abutment plate 47 is separated from the bottom ends of the two fixed plates 421, the fixed plate 421 can be reset under the elastic force of the arc-shaped telescopic rod 44, thereby driving the rotating rod 42 to reset. As the abutment plate 47 moves back and forth up and down, the multiple spray guns 43 fixed on the rotating rod 42 can be reciprocated to evenly rinse the surface of the sieve plate 111, and the cleaning liquid falls into the cleaning liquid collecting tank 15 through the first water outlet 311 and the second water outlet 321, which is convenient for the later reuse of the cleaning liquid.

[0030] The working principle and use process of the present invention are as follows: when the drilling fluid is screened, the drilling fluid can be fed through a feeding port provided at the top of the feeding bin 13 by a conveying device (for example, a conveyor belt), and then the drilling fluid falls onto the screening plate 111 through a discharging port provided at the bottom of the feeding bin 13, and then a plurality of vibration motors 12 are started to make the screening plate 111 vibrate and filter the liquid part in the drilling fluid, and the liquid part in the drilling fluid passes through the screening plate 111 and falls to the top of the first porous plate 31, and at the same time, the vibration seat 11 fixedly connected to the screening plate 111 reciprocates inside the screen body seat 1, and a plurality of lower fixed rods 21 fixed to the bottom end of the vibration seat 11 can reciprocate with the vibration seat 11, thereby driving the lower fixed rods 21 fixed to the lower fixed rods 2 The piston plate 211 at the bottom of the pressure accumulator 22 slides up and down reciprocatingly. At this time, the air in the pressure accumulator 22 can enter the air bag 224 under the cooperation of the first one-way valve 212, the piston plate 211, the second one-way valve 221, the partition plate 222, the third one-way valve 223, the air bag 224 and the pressure relief valve 225. With the repeated reciprocating sliding of the piston plate 211, the air bag 224 can be continuously expanded. When the air bag 224 is in close contact with the inner wall of the expansion chamber, the air pressure in the air bag 224 is continuously increased, so that the pressure relief valve 225 is automatically opened. At the same time, under the elastic force of the air bag 224, the air in the air bag 224 can enter the connecting pipe through the air guide pipe 23, and then be discharged through the multiple nozzles 231 on the first porous plate 31. , the fine particles inside the sieve plate 111 can be blown out, and the sieved drilling fluid falls into the drilling fluid collecting tank 14 along the inclined surface of the first porous plate 31, and the sieved impurities fall to the outside of the sieve body seat 1 along the inclined surface of the sieve plate 111. When it is necessary to clean the sieve plate 111, the electric telescopic rod 33 can be started to push the second porous plate 32 fixedly connected to the end of the electric telescopic rod 33 to slide on the bottom end of the first porous plate 31, and the second water outlet 321 opened on the second porous plate 32 is in a coaxial position with the first water outlet 311. At this time, the water pump can be started to allow the cleaning fluid in the water tank 45 to enter the spray gun 43 through the water guide pipe 46 and be sprayed out through the spray gun 43. At this time, the cleaning fluid can be cleaned by starting the water pump. The plurality of vibration motors 12 are driven to make the sieve plate 111 reciprocate up and down, thereby driving the support plate 47 fixed on the sieve plate 111 to reciprocate up and down. When the top of the support plate 47 contacts the bottom ends of the two fixed plates 421, the self-rotating rod 42 fixedly connected to the fixed plate 421 can be pushed to rotate around the connection position with the support seat 41. At this time, the fixed plate 421 is in a circular motion. At the same time, the circular motion of the fixed plate 421 can compress the arc-shaped telescopic rod 44. Under the elastic force of the arc-shaped telescopic rod 44, the fixed plate 421 can be reset, thereby driving the self-rotating rod 42 to reset. As the support plate 47 reciprocates up and down, the plurality of spray guns 43 fixed on the self-rotating rod 42 can be reciprocated to evenly wash the surface of the sieve plate 111.The cleaning liquid falls into the cleaning liquid collecting tank 15 through the first water outlet 311 and the second water outlet 321.

[0031] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A vibrating screen for drilling fluid treatment with anti-blocking function, comprising a screen body seat (1), characterized in that: A plurality of pressure storage cleaning components (2) are arranged inside the sieve body seat (1), a collecting and discharging component (3) is arranged on the sieve body seat (1), and the plurality of pressure storage cleaning components (2) are distributed around the collecting and discharging component (3); A vibration seat (11) is slidably mounted on the sieve body seat (1); a plurality of vibration motors (12) are fixedly mounted between the bottom end of the vibration seat (11) and the sieve body seat (1); a sieve plate (111) is fixedly mounted on the inner wall of the vibration seat (11); and a feed bin (13) is fixedly mounted on the top end of the sieve body seat (1) and located on one side of the sieve plate (111); Each of the pressure-accumulating cleaning assemblies (2) comprises a lower fixing rod (21) fixed to the bottom end of the vibration seat (11); a pressure-accumulating cylinder (22) slidably connected to the lower fixing rod (21) is fixedly arranged on the screen body seat (1); an air inlet hole is provided on the pressure-accumulating cylinder (22), and a second one-way valve (221) is fixedly arranged inside the air inlet hole; a piston plate (211) is fixedly arranged at the bottom end of the lower fixing rod (21), and a first one-way valve (212) is fixedly arranged on the piston plate (211) and extends to the bottom thereof. The inner wall of the pressure accumulator (22) is fixedly provided with a partition (222) below the piston plate (211), the partition (222) is fixedly provided with a third one-way valve (223) penetrating to the bottom thereof, an air bag (224) is fixedly provided between the bottom end of the partition (222) and the inner wall of the pressure accumulator (22), an air outlet is provided at the bottom end of the pressure accumulator (22), and a pressure relief valve (225) is provided inside the air outlet, and an air guide pipe (23) connected to the air outlet is fixedly provided at the bottom end of the pressure accumulator (22); The collecting and discharging assembly (3) comprises a first porous plate (31) fixed on the sieve body seat (1), and the first porous plate (31) is located below the sieve plate (111), a plurality of nozzles (231) are fixedly arranged on the top of the first porous plate (31), and a connecting pipe is fixedly arranged between the plurality of nozzles (231) and the plurality of air guide pipes (23), and the connecting pipe is located inside the first porous plate (31).

2. A vibrating screen for drilling fluid treatment with anti-blocking function according to claim 1, characterized in that: An expansion chamber is provided inside the pressure accumulator (22) below the partition (222); when the piston plate (211) slides toward the partition (222), the second one-way valve (221) is in an open state, the first one-way valve (212) is in a closed state, and the third one-way valve (223) is in an open state; when the piston plate (211) slides toward the second one-way valve (221), the second one-way valve (221) is in a closed state, the first one-way valve (212) is in an open state, and the third one-way valve (223) is in a closed state.

3. The vibrating screen for drilling fluid treatment with anti-blocking function according to claim 1, characterized in that: The plurality of spray heads (231) are distributed in a rectangular array, a plurality of first water outlet holes (311) are provided at the top of the first porous plate (31), and the plurality of first water outlet holes (311) are distributed in a rectangular array, and the plurality of first water outlet holes (311) are staggered with the plurality of spray heads (231).

4. The vibrating screen for drilling fluid treatment with anti-blocking function according to claim 1, characterized in that: A second porous plate (32) slides below the first porous plate (31), and a baffle is fixedly arranged at the bottom end of the second porous plate (32), an electric telescopic rod (33) is fixedly arranged between the baffle and the bottom end of the first porous plate (31), a plurality of second water outlet holes (321) are opened on the second porous plate (32), a spray assembly (4) is arranged on the sieve body seat (1), and the spray assembly (4) comprises two pairs of support seats (41) fixed on the sieve body seat (1), a self-rotating rod (42) is fixedly arranged between each pair of the support seats (41), a plurality of spray guns (43) are arranged on each of the self-rotating rods (42), a water tank (45) is fixedly arranged on each pair of the support seats (41), a water pump is arranged on each water tank (45), and a water guide pipe (46) is arranged between the water pump and each spray gun (43).

5. The vibrating screen for drilling fluid treatment with anti-blocking function according to claim 4, characterized in that: A movable groove matching the second porous plate (32) is provided at the bottom end of the first porous plate (31); when the second porous plate (32) is in an initial position, each of the second water outlet holes (321) is located on one side of each first water outlet hole (311); when the electric telescopic rod (33) drives the second porous plate (32) to slide, each of the second water outlet holes (321) is connected to each first water outlet hole (311).

6. The vibrating screen for drilling fluid treatment with anti-blocking function according to claim 4, characterized in that: Each group of the spray guns (43) is connected to the water pump via a water pipe (46); a fixing plate (421) is fixedly provided on the arc-shaped outer wall of each rotating rod (42); a curved telescopic rod (44) is fixedly provided on each supporting seat (41); the other end of each curved telescopic rod (44) is fixedly connected to the top of each fixing plate (421); two abutment plates (47) are fixedly provided on the top of the sieve plate (111), and the two abutment plates (47) are respectively located below the two pairs of fixing plates (421).

7. The vibrating screen for drilling fluid treatment with anti-blocking function according to claim 1, characterized in that: A drilling fluid collection groove (14) is provided on the sieve body seat (1) below the second porous plate (32), a cleaning fluid collection groove (15) is provided on the sieve body seat (1) on one side of the drilling fluid collection groove (14), and butterfly valves extending to the bottom of the sieve body seat (1) are provided at the bottom ends of the drilling fluid collection groove (14) and the cleaning fluid collection groove (15).

8. The vibrating screen for drilling fluid treatment with anti-blocking function according to claim 1, characterized in that: The top end of the feed bin (13) is provided with a feed port, the bottom end of the feed bin (13) is provided with a discharge port, and the discharge port is located above the sieve plate (111).

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