A simple and practical sluice screen

Abstract

This utility model discloses a simple and practical sluice screen, relating to the field of refractory material manufacturing technology. This simple and practical sluice screen includes a sluice shell, inside which a screening component is installed. A maintenance component is located on one side of the sluice shell. The screening component includes a screen mesh installed inside the sluice shell, with lifting lugs fixedly installed on both sides of the screen mesh. This design ensures that the screening component reliably solves the screening problem under its own weight during use, requiring only periodic vibration from a low-power bin vibrator, resulting in significant cost savings. It is small in size, lightweight, easy to install and maintain, and has a simple structure. Multiple inspection holes are provided on the top of the sluice screen for easy inspection, replacement of the screen mesh, and sampling for testing. It replaces traditional vibrating screen equipment, and its effectiveness is particularly evident in processing and screening fine powders such as lime or sand. Furthermore, it requires little installation space and is lightweight, allowing for screening even in compact layouts.

Description

Technical Field

[0001] This utility model relates to the field of refractory material manufacturing technology, specifically a simple and practical sluice screen. Background Technology

[0002] Refractory sand, also known as diamond sand or silicon carbide, is produced by smelting silica sand, petroleum coke (or coal coke), and sawdust (salt is added when producing green silicon carbide) at high temperatures in an electric resistance furnace. Currently, industrially produced silicon carbide in my country is divided into two types: black silicon carbide and green silicon carbide, both of which are hexagonal crystals.

[0003] In the screening system process of lime or sand making in the refractory industry, the main equipment of the traditional screening system is the vibrating screen. However, the equipment vibrates a lot during operation, especially when processing powdery or fine sandy materials, generating a lot of dust. The vibration of the vibrating screen equipment also causes a lot of noise, which seriously affects the physical and mental health of the production personnel. At the same time, it consumes a lot of electricity, making it a high-energy-consuming equipment in the screening system. In view of the above, there is an urgent need to develop a simple and practical sluice screen that requires less maintenance, is energy-saving and practical, and occupies less space. Utility Model Content

[0004] The purpose of this invention is to provide a simple and practical sieve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a simple and practical sluice screen, comprising a sluice shell, wherein a screening component is provided inside the sluice shell, and a maintenance component is provided on one side of the sluice shell.

[0006] The screening assembly includes a screen installed inside the chute shell, with lifting lugs fixedly installed on both sides of the screen, and a bin vibrator fixedly installed on one side of the chute shell.

[0007] The screening components reliably solve the screening problem through their own gravity during use, requiring only periodic vibration from a low-power bin vibrator. This reduces power consumption by 90%–95% compared to traditional vibrating screens, resulting in significant cost savings. The device is small, lightweight, easy to install and maintain, and features a simple structure and reasonable technology. Multiple inspection holes on the top of the chute facilitate screen replacement, sampling, and testing. It effectively replaces traditional vibrating screens, particularly in processing fine powders such as lime or sand. Using this device can reduce power consumption by 90%, and also reduces dust and noise issues. Furthermore, it requires minimal installation space and is lightweight. Flange connections are sufficient for the inlet and outlet, allowing for screening even in compact layouts.

[0008] The maintenance assembly includes a maintenance observation door hinged to one side of the chute shell. A limit plate is fixedly installed on one side of the maintenance observation door, and a positioning block is fixedly installed on one side of the chute shell. A connecting rod is inserted into the positioning block, with one end of the connecting rod inserted into one side of the limit plate. A circular hole is opened at one end of the connecting rod, and a buffer spring is fixedly installed on the inner wall of the circular hole. A piston is fixedly installed at one end of the buffer spring, and a ball is embedded at one end of the piston. A baffle is fixedly installed at one end of the connecting rod, and a tension spring is arranged around the surface of the connecting rod. The two ends of the tension spring are fixedly connected to the opposite sides of the positioning block and the baffle, respectively. This maintenance assembly facilitates the opening, maintenance, and repair of the chute during use, thereby preventing damage to components during subsequent use. It also automatically locks the maintenance observation door when closed. Furthermore, closing and locking the maintenance observation door triggers the internal components, allowing them to self-lubricate during opening and closing, preventing dryness between components due to prolonged use and improving the service life of the chute.

[0009] Preferably, a maintenance guardrail is fixedly installed on one side of the chute shell, and the surface of the maintenance guardrail is provided with anti-slip texture. A first discharge pipe is connected to one side of the chute shell, and a screen underrun observation door is connected to the first discharge pipe. A second discharge pipe is connected to the bottom of the screen, and the second discharge pipe passes through the chute shell and extends to the outside of the chute shell.

[0010] The installation of maintenance guardrails improves safety during maintenance, while the observation door for undersize material on the first discharge pipe allows for inspection and observation during use, facilitating subsequent operation.

[0011] Preferably, bolts are inserted on both sides of the lifting lug, one end of the bolt is threaded to the inner wall of the slide shell, and a threaded hole is opened on one side of the inner wall of the slide shell for the bolt to pass through, and the threaded hole is threaded to the bolt.

[0012] The bolts allow for easy positioning of the screen during use, preventing it from falling off during screening and maintaining its installation stability.

[0013] Preferably, a retaining ring is fixedly installed on the inner wall of the upper circular hole of the plug rod, one side of the retaining ring contacts one side of the piston, the surface of the piston is slidably connected to the inner wall of the circular hole, and a rod hole is opened on the positioning block for the plug rod to pass through, the inner wall of the rod hole is slidably connected to the surface of the plug rod.

[0014] The retaining ring can limit the piston during use, thus preventing the piston and ball from disengaging from one end of the connector rod and ensuring the normal operation of the component.

[0015] Preferably, the limiting plate has an insertion hole on one side for the insertion rod to pass through, and a storage cavity is provided inside the limiting plate. The storage cavity and the insertion hole are connected by a horizontal tube. The horizontal tube is sealed at one end, and a compression rod is inserted into one side of the horizontal tube. A sealing block is fixedly installed at one end of the compression rod, and a sealing rod is fixedly installed at the other end of the compression rod. A rubber block is fixedly installed at one end of the sealing rod.

[0016] By setting the diameter of the sealing rod to be 1.5 times that of the extrusion rod, when the sealing rod separates from the horizontal tube, lubricating oil can enter the interior of the horizontal tube through the hole at one end of the horizontal tube, facilitating subsequent lubrication operations.

[0017] Preferably, a compression spring is arranged around the inside of the horizontal tube and on the surface of the compression rod. One end of the compression spring is fixedly connected to one side of the inner wall of the horizontal tube, and the other end of the compression spring is fixedly connected to one side of the sealing block. One end of the horizontal tube has a circular hole for the compression rod to pass through. The circular hole is adapted to the sealing rod, and the surface of the sealing rod is slidably connected to the inner wall of the circular hole.

[0018] By fitting the sealing rod to the round hole, one end of the horizontal tube can be sealed during use.

[0019] Preferably, one end of the slide shell is connected to a feed pipe, a connecting ring is fixedly installed on the top of the feed pipe, and anti-slip texture is provided on one side of the connecting ring.

[0020] The feed pipe facilitates the addition of raw materials, thus simplifying subsequent use.

[0021] Preferably, the inside of the slide shell is provided with a protective component, which includes a buffer rod fixedly installed on the bottom wall of the slide shell, a buffer tube provided on the top of the buffer rod, a buffer plate slidably connected inside the buffer tube, the surface of the buffer plate slidably connected to the inner wall of the buffer tube, and the buffer plate and the buffer tube are adapted to each other.

[0022] The protective components allow for protective operations during use, facilitating the protection of the screen and preventing damage during subsequent use, thus improving the ease of use of the screen components.

[0023] Preferably, a positioning spring is fixedly installed on the top of the buffer plate, the top of the positioning spring is fixedly connected to the inner top wall of the buffer tube, and the top of the buffer tube is in contact with the lower surface of the screen.

[0024] The positioning springs, along with the buffer plate, protect the screen during use, preventing damage and deformation to the bottom of the screen.

[0025] Preferably, both sides of the slide shell are fixedly installed with lifting rings, the surface of the lifting rings is provided with anti-slip texture, and the lifting rings are inverted U-shaped.

[0026] The lifting rings facilitate hoisting operations during use, making subsequent installation and use easier.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] This simple and practical sluice screen, through its set screening components, reliably solves the screening problem by its own gravity during use. It only uses a low-power bin wall vibrator for periodic vibration, reducing power consumption by 90% to 95% compared to traditional vibrating screens, resulting in significant cost savings. It is small in size, light in weight, easy to install and maintain, has a simple structure, and reasonable technology. The top of the sluice screen is equipped with multiple inspection holes, which facilitates the inspection and replacement of the screen and sampling for testing. It can replace traditional vibrating screen equipment, and its effect is particularly obvious in the processing of fine powders such as lime or sand making. Using this device can effectively reduce power consumption by 90%, and reduce dust and noise problems. At the same time, it has a small installation space, is lightweight, and the inlet and outlet can be connected by flanges. Even in compact layouts, this device can still achieve the screening function.

[0029] (2) This simple and practical sluice screen, through the set maintenance components, makes it convenient to open, inspect and maintain the sluice screen during use, thereby avoiding damage to the components during subsequent use. At the same time, it can automatically lock when closing the maintenance observation door. In addition, the internal components can be triggered when closing and locking the maintenance observation door, so that the components can perform self-lubrication operation during the closing and opening process, avoiding dryness between components due to long-term use, and improving the service life of the sluice screen.

[0030] (3) This simple and practical sieve, through the protective components, can be protected during use, and the sieve can be protected to avoid damage to the sieve during subsequent use, thus improving the ease of use of the sieve components. Attached Figure Description

[0031] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention;

[0032] Figure 2 This is a second-view perspective three-dimensional structural diagram of the present invention;

[0033] Figure 3 This is a schematic diagram of the three-dimensional connection structure between the limiting plate and the positioning block of this utility model;

[0034] Figure 4 This is a three-dimensional sectional view of the connection structure between the limiting plate and the positioning block of this utility model;

[0035] Figure 5This is a first-view perspective three-dimensional cross-sectional structural diagram of the present invention;

[0036] Figure 6 This is a second-view perspective three-dimensional cross-sectional structural diagram of the present invention;

[0037] Figure 7 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0038] Figure 8 This utility model Figure 4 Enlarged schematic diagram of the structure at point B;

[0039] Figure 9 This utility model Figure 6 Enlarged schematic diagram of the structure at point C.

[0040] In the diagram: 1. Sluice box shell; 2. Screening assembly; 200. Screen; 201. Lifting lug; 202. Bin vibrator; 203. Bolt; 3. Maintenance assembly; 300. Maintenance observation door; 301. Limiting plate; 302. Positioning block; 303. Connecting rod; 304. Buffer spring; 305. Piston; 306. Ball bearing; 307. Maintenance guardrail; 308. First discharge pipe; 309. Second discharge pipe; 310. Retaining ring; 311. Horizontal pipe; 312. Extrusion rod; 313. Sealing block; 314. Sealing rod; 315. Rubber block; 316. Extrusion spring; 317. Tension spring; 318. Baffle; 319. Under-screen observation door; 4. Feed pipe; 5. Protective assembly; 500. Buffer rod; 501. Buffer pipe; 502. Buffer plate; 503. Positioning spring. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] Please see Figures 1-9 This utility model provides a technical solution: a simple and practical sluice screen, including a sluice shell 1, a screening component 2 inside the sluice shell 1, and a maintenance component 3 on one side of the sluice shell 1.

[0043] The screening assembly 2 includes a screen 200 installed inside the chute shell 1, with lifting lugs 201 fixedly installed on both sides of the screen 200, and a bin vibrator 202 fixedly installed on one side of the chute shell 1.

[0044] The screening component 2 reliably solves the screening problem by its own gravity during use, and only periodically uses a low-power bin vibrator 202 to vibrate. Compared with traditional vibrating screens, it reduces power consumption by 90% to 95%, resulting in significant cost savings. It is small in size, light in weight, easy to install and maintain, simple in structure, and technically reasonable. Multiple inspection holes are set on the top of the chute for easy inspection and replacement of the screen 200 and sampling for testing. It replaces traditional vibrating screen equipment, and its effect is particularly obvious in the processing of fine powders such as lime or sand making. Using this device can effectively reduce power consumption by 90%, dust and noise problems. At the same time, it has a small installation space, is lightweight, and the inlet and outlet can be connected by flanges. Even in compact layouts, this device can still achieve the screening function.

[0045] The maintenance assembly 3 includes a maintenance observation door 300 hinged to one side of the slide shell 1. A limit plate 301 is fixedly installed on one side of the maintenance observation door 300, and a positioning block 302 is fixedly installed on one side of the slide shell 1. A connecting rod 303 is inserted into the positioning block 302. One end of the connecting rod 303 is inserted into one side of the limit plate 301. A circular hole is opened at one end of the connecting rod 303. A buffer spring 304 is fixedly installed on the inner wall of the circular hole. A piston 305 is fixedly installed at one end of the buffer spring 304. A ball bearing 306 is embedded at one end of the piston 305. A baffle 318 is fixedly installed at one end of the connecting rod 303. The surface of the connecting rod 303... A tension spring 317 is arranged around the screen, with its two ends fixedly connected to the positioning block 302 and the baffle 318 on opposite sides, respectively. The maintenance component 3 facilitates the opening, inspection, and maintenance of the screen during use, thereby preventing damage to components during subsequent use. The maintenance observation door 300 can also be automatically locked when closed. Furthermore, closing and locking the maintenance observation door 300 triggers internal components, enabling self-lubrication during opening and closing, preventing dryness between components after prolonged use, and extending the service life of the screen.

[0046] Please see Figure 1 A maintenance guardrail 307 is fixedly installed on one side of the chute shell 1. The surface of the maintenance guardrail 307 is provided with anti-slip texture. A first discharge pipe 308 is connected to one side of the chute shell 1. A screen undersize observation door 319 is connected to the first discharge pipe 308. A second discharge pipe 309 is connected to the bottom of the screen 200. The second discharge pipe 309 passes through the chute shell 1 and extends to the outside of the chute shell 1. The maintenance guardrail 307 can improve the safety of use during maintenance. At the same time, the screen undersize observation door 319 on the first discharge pipe 308 can be used for maintenance and observation, which is convenient for subsequent use.

[0047] Please see Figure 5Bolts 203 are inserted on both sides of the lifting lug 201. One end of the bolt 203 is threaded to the inner wall of the slide shell 1. A threaded hole is opened on one side of the inner wall of the slide shell 1 for the bolt 203 to pass through. The threaded hole is threaded to the bolt 203. The bolt 203 is provided to limit the screen 200 during use, thereby preventing the screen 200 from falling off during the screening process and maintaining the installation stability of the screen 200.

[0048] Please see Figure 8 A retaining ring 310 is fixedly installed on the inner wall of the upper circular hole of the plug rod 303. One side of the retaining ring 310 contacts one side of the piston 305. The surface of the piston 305 is slidably connected to the inner wall of the circular hole. A rod hole for the plug rod 303 to pass through is provided on the positioning block 302. The inner wall of the rod hole is slidably connected to the surface of the plug rod 303. The retaining ring 310 can limit the piston 305 during use, thereby preventing the piston 305 and the ball 306 from disengaging from one end of the plug rod 303 during use, thus maintaining the normal operation of the component.

[0049] Please see Figure 3 , Figure 4 and Figure 8 The limiting plate 301 has an insertion hole on one side for the insertion rod 303 to pass through. The limiting plate 301 has a receiving cavity inside, which is connected to the insertion hole via a horizontal tube 311. The horizontal tube 311 is one end-sealed. A pressing rod 312 is inserted into one side of the horizontal tube 311. A sealing block 313 is fixedly installed at one end of the pressing rod 312, and a sealing rod 314 is fixedly installed at the other end of the pressing rod 312. A rubber block 315 is fixedly installed at one end of the sealing rod 314. The diameter of the sealing rod 314 is 1.5 times the diameter of the pressing rod 312. When the sealing rod 314 is separated from the horizontal tube 311, lubricating oil can pass through the horizontal tube 311. The hole at one end of 11 leads into the interior of the horizontal tube 311 to facilitate subsequent lubrication. Inside the horizontal tube 311 and around the surface of the extrusion rod 312, a compression spring 316 is arranged. One end of the compression spring 316 is fixedly connected to one side of the inner wall of the horizontal tube 311, and the other end of the compression spring 316 is fixedly connected to one side of the sealing block 313. One end of the horizontal tube 311 has a round hole for the extrusion rod 312 to pass through. The round hole is adapted to the sealing rod 314, and the surface of the sealing rod 314 is slidably connected to the inner wall of the round hole. The sealing rod 314 is adapted to the round hole, and during use, one end of the horizontal tube 311 can be sealed.

[0050] Please see Figure 1One end of the chute shell 1 is connected to the feed pipe 4. A connecting ring is fixedly installed on the top of the feed pipe 4. Anti-slip texture is provided on one side of the connecting ring. The feed pipe 4 facilitates the addition of raw materials, thus facilitating subsequent use. Lifting rings are fixedly installed on both sides of the chute shell 1. The surface of the lifting rings is provided with anti-slip texture, and the lifting rings are inverted U-shaped. The lifting rings facilitate hoisting operations during use, making subsequent installation and use easier.

[0051] Please see Figure 6 and Figure 9 The inside of the slide shell 1 is provided with a protective component 5. The protective component 5 includes a buffer rod 500 fixedly installed on the bottom wall of the slide shell 1. A buffer tube 501 is provided on the top of the buffer rod 500. A buffer plate 502 is slidably connected inside the buffer tube 501. The surface of the buffer plate 502 is slidably connected to the inner wall of the buffer tube 501, and the buffer plate 502 is adapted to the buffer tube 501. The protective component 5 can be used to protect the screen 200 during use, and also facilitates the protection of the screen 200, preventing damage to the screen 200 during subsequent use, thus improving the ease of use of the screen 200 component.

[0052] Please see Figure 9 A positioning spring 503 is fixedly installed on the top of the buffer plate 502. The top of the positioning spring 503 is fixedly connected to the inner top wall of the buffer tube 501. The top of the buffer tube 501 is in contact with the lower surface of the screen 200. The positioning spring 503 can work with the buffer plate 502 to protect the screen 200 during use and prevent the bottom of the screen 200 from being damaged or deformed.

[0053] The screening problem is mainly solved by gravity. To prevent material accumulation, a low-power bin vibrator is used only periodically. The vibrator should be set to vibrate automatically once every 2-5 minutes, with a vibration time of about 3-4 minutes. At the same time, through programming control, a remote control forced vibration function can be realized. The screen is designed to be disassembled, not an integral structure, and can be separated. An inspection and observation hole is set on the top, which can be opened to replace the individual screen 200, which is convenient for inspection and maintenance.

[0054] The overall design of the sluice screen is narrow and wide, with a width between 800 and 1200 mm. This can effectively increase the contact area between the material and the screen, ensuring screening efficiency. The installation angle of the sluice screen should be designed between 55° and 82° with the horizontal, depending on factors such as the specific gravity, viscosity, and particle size of the material.

[0055] Working principle: During use, the raw material to be screened is added through the feed pipe 4, and then enters the area above the screen 200. After the bulk material enters the chute through the feed port, it slides down to the area above the screen 200 by its own gravity. The material flow is guided by the flat structure of the chute shell 1, and the material spreads out to fully contact the screen 200 and moves downward. Large particles are blocked by the screen 200 and, driven by inertia and gravity, slide downward to the discharge port. Small particles fall through the screen 200 to the lower layer and slide along the chute shell 1 to the discharge port. Considering the abnormal situation of material blockage and accumulation during material conveying, the bin wall vibrator 202 is controlled. The start and stop of the vibrator are controlled by logic programming. The bin wall vibrator 202 is required to vibrate once every 2 to 5 minutes to avoid material blockage and ensure smooth material flow.

[0056] When the inspection door 300 needs to be opened, pull the plug rod 303 on the baffle 318. One end of the plug rod 303 then separates from one side of the limit plate 301. Subsequently, one end of the horizontal tube 311 separates from the sealing block 313 on one side of the horizontal tube 311. Then, the compression spring 316 resets the sealing block 313, causing it to separate from the horizontal tube 311. Lubricating oil inside the horizontal tube 311 enters the plug hole for lubrication. When the inspection door 300 needs to be closed, close the inspection door 300. Under gravity... Under the action, the inspection door 300 squeezes the ball 306, the piston 305 on one side of the ball 306 moves to the right, and at the same time the insertion rod 303 moves to the right. When the insertion rod 303 is inside the insertion hole, the tension spring 317 resets the insertion rod 303 on the baffle 318, and at the same time the buffer spring 304 resets the ball 306 on the piston 305, so that the sealing block 313 squeezes the sealing rod 314 and the rubber block 315 on the compression rod 312 to the left. At this time, the lubricating oil stored in the limit plate 301 enters the interior of the horizontal tube 311.

[0057] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0058] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A simple and practical sluice screen, comprising a sluice shell (1), characterized in that: The chute shell (1) is provided with a screening component (2) inside, and a maintenance component (3) is provided on one side of the chute shell (1); The screening assembly (2) includes a screen (200) provided inside the chute shell (1), with lifting lugs (201) fixedly installed on both sides of the screen (200), and a bin vibrator (202) fixedly installed on one side of the chute shell (1). The maintenance assembly (3) includes a maintenance observation door (300) hinged to one side of the slide shell (1). A limit plate (301) is fixedly installed on one side of the maintenance observation door (300), and a positioning block (302) is fixedly installed on one side of the slide shell (1). A plug-in rod (303) is inserted into the positioning block (302), one end of which is inserted into one side of the limit plate (301), and one end of the plug-in rod (303) has a round hole. A buffer spring (304) is fixedly installed on the inner wall of the round hole. A piston (305) is fixedly installed on one end of the buffer spring (304). A ball (306) is embedded in one end of the piston (305). A baffle (318) is fixedly installed on one end of the plug rod (303). A tension spring (317) is arranged around the surface of the plug rod (303). The two ends of the tension spring (317) are fixedly connected to the positioning block (302) and the baffle (318) on the opposite side, respectively.

2. The simple and practical sieve according to claim 1, characterized in that: A maintenance guardrail (307) is fixedly installed on one side of the chute shell (1). The surface of the maintenance guardrail (307) is provided with anti-slip texture. A first discharge pipe (308) is connected to one side of the chute shell (1). A screen observation door (315) is connected to the first discharge pipe (308). A second discharge pipe (309) is connected to the bottom of the screen (200). The second discharge pipe (309) passes through the chute shell (1) and extends to the outside of the chute shell (1).

3. The simple and practical sieve according to claim 1, characterized in that: Bolts (203) are inserted on both sides of the lifting lug (201). One end of the bolt (203) is threaded to the inner wall of the slide shell (1). A screw hole is opened on one side of the inner wall of the slide shell (1) for the bolt (203) to pass through. The screw hole is threaded to the bolt (203).

4. A simple and practical sieve according to claim 1, characterized in that: A retaining ring (310) is fixedly installed on the inner wall of the upper circular hole of the plug rod (303). One side of the retaining ring (310) contacts one side of the piston (305). The surface of the piston (305) is slidably connected to the inner wall of the circular hole. A rod hole is opened on the positioning block (302) for the plug rod (303) to pass through. The inner wall of the rod hole is slidably connected to the surface of the plug rod (303).

5. A simple and practical sieve according to claim 1, characterized in that: The limiting plate (301) has an insertion hole on one side for the insertion rod (303) to pass through. The limiting plate (301) has a storage cavity inside. The storage cavity and the insertion hole are connected by a horizontal tube (311). The horizontal tube (311) is sealed at one end. A pressing rod (312) is inserted into one side of the horizontal tube (311). A sealing block (313) is fixedly installed at one end of the pressing rod (312). A sealing rod (314) is fixedly installed at the other end of the pressing rod (312). A rubber block (315) is fixedly installed at one end of the sealing rod (314).

6. A simple and practical sieve according to claim 5, characterized in that: A compression spring (316) is arranged around the inside of the horizontal tube (311) and on the surface of the compression rod (312). One end of the compression spring (316) is fixedly connected to one side of the inner wall of the horizontal tube (311), and the other end of the compression spring (316) is fixedly connected to one side of the sealing block (313). One end of the horizontal tube (311) is provided with a circular hole for the compression rod (312) to pass through. The circular hole is adapted to the sealing rod (314), and the surface of the sealing rod (314) is slidably connected to the inner wall of the circular hole.

7. A simple and practical sieve according to claim 1, characterized in that: One end of the slide shell (1) is connected to the feed pipe (4), and a connecting ring is fixedly installed on the top of the feed pipe (4). Anti-slip texture is provided on one side of the connecting ring.

8. A simple and practical sieve according to claim 1, characterized in that: The slide shell (1) is provided with a protective component (5). The protective component (5) includes a buffer rod (500) fixedly installed on the bottom wall of the slide shell (1). A buffer tube (501) is provided on the top of the buffer rod (500). A buffer plate (502) is slidably connected inside the buffer tube (501). The surface of the buffer plate (502) is slidably connected to the inner wall of the buffer tube (501), and the buffer plate (502) is adapted to the buffer tube (501).

9. A simple and practical sieve according to claim 8, characterized in that: A positioning spring (503) is fixedly installed on the top of the buffer plate (502). The top of the positioning spring (503) is fixedly connected to the inner top wall of the buffer tube (501). The top of the buffer tube (501) is in contact with the lower surface of the screen (200).

10. A simple and practical sluice screen according to claim 1, characterized in that: Both sides of the slide shell (1) are fixedly installed with lifting rings. The surface of the lifting rings is provided with anti-slip texture and the lifting rings are inverted U-shaped.

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