Simple and practical slide sieve

Abstract

The invention discloses a simple and practical slide sieve, and relates to the technical field of refractory material manufacturing. The simple and practical slide sieve comprises a slide carriage shell, a sieving assembly is arranged in the slide carriage shell, an overhauling assembly is arranged on one side of the slide carriage shell, the sieving assembly comprises a sieve arranged in the slide carriage shell, and lifting lugs are fixedly installed on the two sides of the sieve. The screening problem is solved by the self-gravity of the arranged screening assembly in the using process, only the low-power bin wall vibrator is periodically used for vibration, the cost is remarkably saved, the size is small, the weight is light, installation and maintenance are convenient, the structure is simple, multiple inspection holes are formed in the top of the slide sieve, the sieve net is convenient to overhaul and replace, and sampling and testing are convenient; the vibrating screen device replaces traditional vibrating screen equipment, is obvious in using effect especially in occasions for treating and screening lime or making sand and other fine powder materials, meanwhile, is small in installation space occupied area and light in weight, and can still achieve the screening function under the condition that the space layout is compact.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refractory material manufacturing, in particular to a simple and practical chute screen. BACKGROUND

[0002] Refractory sand, also known as silicon carbide or silicon carbide, is made of quartz sand, petroleum coke (or coal coke), wood chips (salt is needed when producing green silicon carbide), etc. in an electric resistance furnace at high temperature. Refractory sand, also known as silicon carbide or silicon carbide, is made of quartz sand, petroleum coke (or coal coke), wood chips (salt is needed when producing green silicon carbide), etc. in an electric resistance furnace at high temperature. Currently, the silicon carbide produced in China is divided into 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 traditional screening system main equipment is a vibrating screen. However, the device vibrates greatly during operation, especially when processing powdery or fine sand materials, which produces a lot of dust and high noise caused by vibrating screen vibration, seriously affecting the physical and mental health of production personnel. At the same time, it consumes a lot of electricity and is a high-energy consumption device of the screening system. In view of the above situation, it is urgent to develop a simple and practical chute screen with less maintenance, energy saving, practicality, and small volume space occupation. SUMMARY

[0004] The purpose of the present application is to provide a simple and practical chute screen to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a simple and practical chute screen, comprising a chute shell, a screening assembly is arranged inside the chute shell, and a maintenance assembly is arranged on one side of the chute shell.

[0006] The screening assembly comprises a screen arranged inside the chute shell, and lug ears are fixedly installed on both sides of the screen, and a bin wall vibrator is fixedly installed on one side of the chute shell.

[0007] The screening assembly is arranged to solve the screening problem by relying on gravity during use, and only a small-power bin wall vibrator is used periodically, which reduces the power consumption by 90%-95% compared with the traditional vibrating screen, significantly saves costs, has small volume and light weight, is convenient to install and maintain, has simple structure, reasonable technology, and the top of the chute screen is provided with a plurality of inspection holes for convenient maintenance and replacement of the screen and sampling and testing. The device replaces the traditional vibrating screen equipment, and has obvious effect in the use of fine powder materials such as lime or sand making. The device can effectively reduce the power consumption by 90%, the dust and noise problems, and at the same time, the installation space is small, the weight is light, the flange connection is adopted for the inlet and outlet, and the screening function can still be realized under the condition of compact space layout.

[0008] The maintenance assembly comprises a maintenance observation door hinged to one side of the chute shell through a hinge, a limiting plate is fixedly installed on one side of the maintenance observation door, a positioning block is fixedly installed on one side of the chute shell, a plug-in rod is inserted on the positioning block, one end of the plug-in rod is inserted into one side of the limiting plate, a circular hole is formed in one end of the plug-in rod, a buffer spring is fixedly installed on the inner wall of the circular hole, a piston is fixedly installed on one end of the buffer spring, a ball is embedded on one end of the piston, a baffle is fixedly installed on one end of the plug-in rod, a pull spring is arranged around the surface of the plug-in rod, and the two ends of the pull spring are fixedly connected to the opposite sides of the positioning block and the baffle, respectively.

[0009] Preferably, a maintenance guard is fixedly installed on one side of the chute shell, anti-skid lines are formed on the surface of the maintenance guard, a first discharge pipe is communicated with one side of the chute shell, a sieve discharge observation door is communicated with the first discharge pipe, a second discharge pipe is communicated with the bottom of the sieve, and the second discharge pipe penetrates through the chute shell and extends to the outside of the chute shell.

[0010] The maintenance guard improves the use safety during maintenance, and the sieve discharge observation door on the first discharge pipe can be observed and maintained during use, which is convenient for subsequent use.

[0011] Preferably, bolts are inserted on both sides of the lifting lug, one end of the bolt is threadedly connected to the inner wall of the chute shell, a screw hole is formed in one side of the inner wall of the chute shell for the bolt to pass through, and the screw hole is threadedly connected with the bolt.

[0012] The bolt is arranged to conveniently limit the sieve, so that the sieve is prevented from falling off during screening, and the installation stability of the sieve is maintained.

[0013] Preferably, a stop ring is fixedly installed on the inner wall of the upper circular hole of the plug-in rod, one side of the stop ring is in contact with one side of the piston, the surface of the piston is slidingly connected with the inner wall of the circular hole, a rod hole is formed in the positioning block for the plug-in rod to pass through, and the inner wall of the rod hole is slidingly connected with the surface of the plug-in rod.

[0014] The stop ring is arranged to limit the piston during use, so that the piston and the ball are prevented from being separated from one end of the plug-in rod during use, and the normal operation of the component is maintained.

[0015] Preferably, one side of the limiting plate is provided with a plug-in hole for the plug-in rod, and the inside of the limiting plate is provided with a receiving cavity, which is communicated with the plug-in hole through a cross pipe, the cross pipe is in a one-end-plugged state, one side of the cross pipe is provided with an extrusion rod, one end of the extrusion rod is fixedly installed with a sealing block, the other end of the extrusion rod is fixedly installed with a sealing rod, and one end of the sealing rod is fixedly installed with a rubber block.

[0016] The diameter of the sealing rod is one and a half times of the diameter of the extrusion rod, and when the sealing rod is separated from the cross pipe, the lubricating oil can enter the inside of the cross pipe through the hole at one end of the cross pipe, facilitating subsequent lubrication operation.

[0017] Preferably, the inside of the cross pipe and the surface of the extrusion rod are provided with an extrusion spring, one end of the extrusion spring is fixedly connected with one side of the inner wall of the cross pipe, the other end of the extrusion spring is fixedly connected with one side of the sealing block, one end of the cross pipe is provided with a round hole for the extrusion rod, the round hole is matched with the sealing rod, and the surface of the sealing rod is slidably connected with the inner wall of the round hole.

[0018] The sealing rod is matched with the round hole, and one end of the cross pipe can be plugged during use.

[0019] Preferably, one end of the chute shell is communicated with a feeding pipe, the top of the feeding pipe is fixedly installed with a connecting ring, and the side of the connecting ring is provided with anti-skid lines.

[0020] The feeding pipe is provided to facilitate the addition of raw materials, thereby facilitating subsequent use.

[0021] Preferably, the inside of the chute shell is provided with a protection assembly, the protection assembly comprises a buffer rod fixedly installed on the inner bottom wall of the chute shell, the top of the buffer rod is provided with a buffer pipe, the inside of the buffer pipe is slidably connected with a buffer plate, the surface of the buffer plate is slidably connected with the inner wall of the buffer pipe, and the buffer plate is matched with the buffer pipe.

[0022] The protection assembly is provided to protect the screen during use, and also facilitates protection of the screen, avoids damage to the screen during subsequent use, and improves the use convenience of the screen component.

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

[0024] The positioning spring is provided to cooperate with the buffer plate to protect the screen during use, and avoid damage and deformation of the bottom of the screen.

[0025] Preferably, the two sides of the chute shell are fixedly installed with lifting rings, the surface of the lifting rings is provided with anti-skid lines, and the lifting rings are in inverted U-shaped.

[0026] Through the lifting ring, the hoisting operation is facilitated during use, and subsequent installation and use are facilitated.

[0027] Compared with the prior art, the present application has the following advantages:

[0028] (1) The simple and practical chute screen reliably solves the screening problem by gravity during use, only periodically uses a small-power bin wall vibrator to vibrate, reduces power consumption by 90%-95% compared with a traditional vibrating screen, significantly saves costs, has small size and light weight, is convenient to install and maintain, has simple structure and reasonable technology, a plurality of inspection holes are arranged at the top of the chute screen to facilitate maintenance and replacement of the screen and sampling and testing, replaces the traditional vibrating screen equipment, and the use effect is obvious especially in the field of processing and screening of fine powder such as lime or sand, the device can effectively reduce power consumption by 90%, dust and noise problems, and the device still has the screening function under the condition of compact space layout because the inlet and outlet are connected by flanges.

[0029] (2) The simple and practical chute screen facilitates opening, maintenance and maintenance operation of the chute screen during use, thereby avoiding damage to components during subsequent use, and the components inside can be triggered when the maintenance observation door is closed and locked, so that the components can be self-lubricated during closing and opening, the dryness between the components caused by long-time use is avoided, and the service life of the chute screen is improved.

[0030] (3) The simple and practical chute screen facilitates protection operation during use, and also facilitates protection of the screen, avoids damage to the screen during subsequent use, and improves the use convenience of the screen component. DETAILED DESCRIPTION

[0031] Figure 1 is a first perspective view of the present application;

[0032] Figure 2 is a second perspective view of the present application;

[0033] Figure 3 is a perspective connection structure diagram of the limiting plate and the positioning block of the present application;

[0034] Figure 4 is a perspective cross-sectional connection structure diagram of the limiting plate and the positioning block of the present application;

[0035] Figure 5 is a first perspective cross-sectional structure diagram of the present application;

[0036] Figure 6 The second perspective view of the sectional structure of the present application is shown in the figure.

[0037] Figure 7 The second perspective view of the sectional structure of the present application is shown in the figure. Figure 2 The second perspective view of the sectional structure of the present application is shown in the figure.

[0038] Figure 8 The second perspective view of the sectional structure of the present application is shown in the figure. Figure 4 The second perspective view of the sectional structure of the present application is shown in the figure.

[0039] Figure 9 The second perspective view of the sectional structure of the present application is shown in the figure. Figure 6 The second perspective view of the sectional structure of the present application is shown in the figure.

[0040] In the figure: 1, the slide plate shell; 2, the screening assembly; 200, the screen; 201, the lifting lug; 202, the bin wall vibrator; 203, the bolt; 3, the maintenance assembly; 300, the maintenance observation door; 301, the limiting plate; 302, the positioning block; 303, the plug-in rod; 304, the buffer spring; 305, the piston; 306, the ball; 307, the maintenance guardrail; 308, the first discharge pipe; 309, the second discharge pipe; 310, the blocking ring; 311, the cross pipe; 312, the extrusion rod; 313, the sealing block; 314, the sealing rod; 315, the rubber block; 316, the extrusion spring; 317, the tension spring; 318, the baffle; 319, the screen discharge observation door; 4, the feeding pipe; 5, the protection assembly; 500, the buffer rod; 501, the buffer pipe; 502, the buffer plate; 503, the positioning spring. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] Please refer to Figures 1-9 The present application provides a technical solution: a simple and practical slide screen, which comprises a slide plate shell 1, a screening assembly 2 arranged in the interior of the slide plate shell 1, and a maintenance assembly 3 arranged on one side of the slide plate shell 1.

[0043] The screening assembly 2 comprises a screen 200 arranged in the interior of the slide plate shell 1, lifting lugs 201 fixedly installed on both sides of the screen 200, and a bin wall vibrator 202 fixedly installed on one side of the slide plate shell 1.

[0044] The screening assembly 2 is arranged to solve the screening problem by gravity in use, and only needs to be vibrated by a small-power bin wall vibrator 202 periodically, so that the power consumption is reduced by 90%-95% compared with the traditional vibrating screen, the cost is saved significantly, the volume is small, the weight is light, the installation and maintenance are convenient, the structure is simple, the technology is reasonable, a plurality of inspection holes are arranged on the top of the chute screen, the screen mesh 200 can be conveniently replaced and sampling and testing, the traditional vibrating screen equipment is replaced, the effect is obvious especially in the field of processing and screening of fine powder such as lime or sand, the power consumption can be effectively reduced by 90% by using the device, the dust and noise problems are solved, the installation space is small, the weight is light, the inlet and outlet are connected by flanges, and the screening function can be realized in the case of compact space layout.

[0045] The maintenance assembly 3 comprises a maintenance observation door 300 hinged on one side of the chute shell 1 through a hinge, one side of the maintenance observation door 300 is fixedly installed with a limiting plate 301, one side of the chute shell 1 is fixedly installed with a positioning block 302, a plug-in rod 303 is inserted on the positioning block 302, one end of the plug-in rod 303 is inserted into one side of the limiting plate 301, a circular hole is formed in one end of the plug-in rod 303, a buffer spring 304 is fixedly installed on the inner wall of the circular hole, one end of the buffer spring 304 is fixedly installed with a piston 305, one end of the piston 305 is embedded with a ball 306, one end of the plug-in rod 303 is fixedly installed with a baffle 318, a pull spring 317 is arranged around the surface of the plug-in rod 303, and the two ends of the pull spring 317 are fixedly connected with the opposite sides of the positioning block 302 and the baffle 318. The maintenance assembly 3 is arranged to facilitate the opening, maintenance and maintenance operation of the chute screen in use, so that the damage of the parts in the subsequent use is avoided, the automatic locking operation of the maintenance observation door 300 can be realized when the maintenance observation door 300 is closed, in addition, the parts arranged inside can be triggered when the maintenance observation door 300 is closed and locked, so that the self-lubrication operation of the parts can be realized in the closing and opening process, the dryness between the parts caused by long-time use is avoided, and the service life of the chute screen is improved.

[0046] Please refer to Figure 1 , one side of the chute shell 1 is fixedly installed with a maintenance guardrail 307, anti-slip lines are formed on the surface of the maintenance guardrail 307, the chute shell 1 is communicated with a first discharge pipe 308, the first discharge pipe 308 is communicated with a screen discharge observation door 319, the bottom of the screen mesh 200 is communicated with a second discharge pipe 309, the second discharge pipe 309 penetrates through the chute shell 1 and extends to the outside of the chute shell 1, the maintenance guardrail 307 is arranged to improve the use safety during maintenance, and the screen discharge observation door 319 arranged on the first discharge pipe 308 can be observed and maintained in use, which is convenient for subsequent use.

[0047] Please refer to Figure 5Both sides of the lug 201 are provided with a bolt 203, one end of the bolt 203 is threadedly connected with the inner wall of the chute shell 1, one side of the inner wall of the chute shell 1 is provided with a threaded hole for the bolt 203 to pass through, the threaded hole is threadedly connected with the bolt 203, the bolt 203 is arranged, which facilitates the positioning of the screen 200 during use, thereby avoiding the screen 200 from falling during screening, and the installation stability of the screen 200 is maintained.

[0048] Please refer to Figure 8 The upper circular hole of the insertion rod 303 is fixedly provided with a retaining ring 310, one side of the retaining ring 310 is in contact with one side of the piston 305, the surface of the piston 305 is slidably connected with the inner wall of the circular hole, the positioning block 302 is provided with a rod hole for the insertion rod 303 to pass through, the inner wall of the rod hole is slidably connected with the surface of the insertion rod 303, the retaining ring 310 is arranged, which can position the piston 305 during use, thereby avoiding the piston 305 and the ball 306 from being separated from one end of the insertion rod 303 during use, and the normal operation of the component is maintained.

[0049] Please refer to Figure 3 , Figure 4 and Figure 8 One side of the limiting plate 301 is provided with an insertion hole for the insertion rod 303 to pass through, the inside of the limiting plate 301 is provided with a receiving cavity, the receiving cavity and the insertion hole are communicated through a cross pipe 311, the cross pipe 311 is in a one-end-plugged state, one side of the cross pipe 311 is provided with an extrusion rod 312, one end of the extrusion rod 312 is fixedly provided with a sealing block 313, the other end of the extrusion rod 312 is fixedly provided with a sealing rod 314, one end of the sealing rod 314 is fixedly provided with a rubber block 315, the diameter of the sealing rod 314 is one and a half times the diameter of the extrusion rod 312, when the sealing rod 314 is separated from the cross pipe 311, lubricating oil can enter the inside of the cross pipe 311 through the hole at one end of the cross pipe 311, facilitating subsequent lubrication operation, the inside of the cross pipe 311 and the surface of the extrusion rod 312 are provided with an extrusion spring 316, one end of the extrusion spring 316 is fixedly connected with one side of the inner wall of the cross pipe 311, the other end of the extrusion spring 316 is fixedly connected with one side of the sealing block 313, one end of the cross pipe 311 is provided with a circular hole for the extrusion rod 312 to pass through, the circular hole is matched with the sealing rod 314, and the surface of the sealing rod 314 is slidably connected with the inner wall of the circular hole, the sealing rod 314 is matched with the circular hole, which can block one end of the cross pipe 311 during use.

[0050] Please refer to Figure 1One end of the chute shell 1 is communicated with the feeding pipe 4, the top of the feeding pipe 4 is fixedly installed with a connecting ring, the connecting ring is provided with anti-skid lines on one side, the feeding pipe 4 is convenient for the addition of raw materials, thereby facilitating subsequent use, and the two sides of the chute shell 1 are fixedly installed with lifting rings, the lifting rings are provided with anti-skid lines on the surfaces, and the lifting rings are inverted U-shaped, so that the lifting rings are convenient for hoisting operation in the using process, and subsequent installation and use are facilitated.

[0051] Please refer to Figure 6 and Figure 9 The inside of the chute shell 1 is provided with a protection assembly 5, the protection assembly 5 comprises a buffer rod 500 fixedly installed on the inner bottom wall of the chute shell 1, the top of the buffer rod 500 is provided with a buffer pipe 501, the buffer pipe 501 is slidably connected with a buffer plate 502, the surface of the buffer plate 502 is slidably connected with the inner wall of the buffer pipe 501, and the buffer plate 502 is matched with the buffer pipe 501, so that the protection assembly 5 can be protected in the using process, the screen 200 is also protected, damage of the screen 200 in the subsequent using process is avoided, and the use convenience of the screen 200 component is improved.

[0052] Please refer to Figure 9 The top of the buffer plate 502 is fixedly installed with a positioning spring 503, the top of the positioning spring 503 is fixedly connected with the inner top wall of the buffer pipe 501, the top of the buffer pipe 501 is in contact with the lower surface of the screen 200, and the positioning spring 503 can cooperate with the buffer plate 502 to protect the screen 200 in the using process, so that the bottom of the screen 200 is prevented from being damaged and deformed.

[0053] The main problem of screening is solved by relying on self-weight, in order to prevent material accumulation, only a small power bin wall vibrator is periodically used to vibrate, the vibrator is preferably arranged to automatically vibrate once every 2-5 minutes, the vibration time is about 3-4 minutes, and through programming control, a remote control forced vibration function can be realized. The screen is designed as a disassembled type, is a non-integral structure, can be disassembled, is provided with an overhaul observation hole at the top, and the screen 200 can be opened and replaced, so that overhaul and maintenance are facilitated.

[0054] The overall design of the chute screen is narrow and wide, the width is preferably designed to be between 800-1200 mm, the contact surface of the material and the screen 200 can be effectively increased, and the screening efficiency is ensured, the installation angle of the chute screen is designed to be between 55°-82° with the horizontal, and specific factors such as the specific gravity, viscosity and particle size of the material are comprehensively considered.

[0055] Working principle: in use, the raw material to be screened is added from the inlet pipe 4, then the raw material enters the upper part of the screen 200, the bulk material enters the chute through the inlet, and then slides to the upper part of the screen 200 under the action of its own gravity, the material flow is guided by the flat structure of the chute shell 1, the material is scattered and fully contacts with the screen 200 and moves downward, the large particle material is blocked by the screen 200 and is driven by the inertia force and gravity to slide to the discharge port, the small particle material falls to the lower layer through the screen 200 and slides to the discharge port along the chute shell 1, considering the abnormal situation of material blocking and accumulation during the material conveying process, the bin wall vibrator 202 is controlled to start and stop through logical programming, the bin wall vibrator 202 is required to vibrate once every 2-5 minutes to avoid the blocking situation and ensure the smooth flow of material.

[0056] When it is needed to open the maintenance observation door 300, the plug-in rod 303 on the baffle 318 is pulled, then one end of the plug-in rod 303 is separated from one side of the limiting plate 301, then one end of the horizontal pipe 311 is separated from the sealing block 313 on one side of the horizontal pipe 311, then the sealing block 313 is reset by the compression spring 316, so that the sealing block 313 is separated from the horizontal pipe 311, the lubricating oil in the horizontal pipe 311 enters the inside of the plug-in hole to lubricate, when it is needed to close the maintenance observation door 300, the maintenance observation door 300 is closed, under the action of gravity, the maintenance observation door 300 extrudes the ball 306, the piston 305 on one side of the ball 306 moves to the right, and the plug-in rod 303 moves to the right, when the plug-in rod 303 is located in the inside of the plug-in hole, the tension spring 317 resets the plug-in rod 303 on the baffle 318, and the buffer spring 304 resets the ball 306 on the piston 305, so that the sealing block 313 extrudes the sealing rod 314 and the rubber block 315 on the extrusion rod 312 to the left, at this time, the lubricating oil received in the limiting plate 301 enters the inside of the horizontal pipe 311.

[0057] The standard parts used in the present application can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt the conventional types in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here. The contents not described in detail in the present description belong to the prior art known by the person skilled in the art.

[0058] The present application and its embodiments have been described above, which is not restrictive, and the drawings shown are only one of the embodiments of the present application, and the actual structure is not limited thereto. In summary, if the person skilled in the art is inspired, without departing from the purpose of the present application, without creative design, similar structure and embodiments of the technical solution can be designed, which should belong to the protection scope of the present application.

Claims

1. A simple practical sizer comprising a sizer housing (1), characterized in that: The inside of the chute shell (1) is provided with a screening assembly (2), and one side of the chute shell (1) is provided with an inspection assembly (3); The screening assembly (2) comprises a screen (200) provided in the inside of the chute shell (1), both sides of the screen (200) are fixedly provided with lifting lugs (201), and one side of the chute shell (1) is fixedly provided with a bin wall vibrator (202). The inspection assembly (3) comprises an inspection observation door (300) hingedly connected to one side of the chute shell (1), one side of the inspection observation door (300) is fixedly provided with a limiting plate (301), one side of the chute shell (1) is fixedly provided with a positioning block (302), a plug-in rod (303) is inserted on the positioning block (302), one end of the plug-in rod (303) is inserted into one side of the limiting plate (301), one end of the plug-in rod (303) is provided with a circular hole, the inner wall of the circular hole is fixedly provided with a buffer spring (304), one end of the buffer spring (304) is fixedly provided with a piston (305), one end of the piston (305) is embedded with a ball (306), one end of the plug-in rod (303) is fixedly provided with a baffle (318), the surface of the plug-in rod (303) is provided with a tension spring (317), and both ends of the tension spring (317) are fixedly connected to the opposite sides of the positioning block (302) and the baffle (318).

2. A simple and practical sifter according to claim 1, characterized in that: One side of the chute shell (1) is fixedly provided with an inspection guardrail (307), the surface of the inspection guardrail (307) is provided with anti-skid lines, one side of the chute shell (1) is communicated with a first discharge pipe (308), the first discharge pipe (308) is communicated with a screen discharge observation door (315), the bottom of the screen (200) is communicated with a second discharge pipe (309), and the second discharge pipe (309) penetrates through the chute shell (1) and extends to the outside of the chute shell (1).

3. A simple and practical sifter according to claim 1, characterized in that: Both sides of the lifting lug (201) are inserted with bolts (203), one end of the bolt (203) is threadedly connected with the inner wall of the chute shell (1), and the inner wall of the chute shell (1) is provided with a threaded hole for the bolt (203) to pass through.

4. A simple and practical sifter according to claim 1, characterized in that: The inner wall of the upper circular hole of the plug-in rod (303) is fixedly provided with a retaining ring (310), one side of the retaining ring (310) is in contact with one side of the piston (305), the surface of the piston (305) is in sliding connection with the inner wall of the circular hole, the positioning block (302) is provided with a rod hole for the plug-in rod (303) to pass through, and the inner wall of the rod hole is in sliding connection with the surface of the plug-in rod (303).

5. A simple and practical sifter according to claim 1, characterized in that: One side of the limiting plate (301) is provided with a plug-in hole for the plug-in rod (303) to pass through, the inside of the limiting plate (301) is provided with a receiving cavity, the receiving cavity and the plug-in hole are communicated through a cross pipe (311), the cross pipe (311) is in a one-end-plugged state, one side of the cross pipe (311) is inserted with an extrusion rod (312), one end of the extrusion rod (312) is fixedly provided with a sealing block (313), the other end of the extrusion rod (312) is fixedly provided with a sealing rod (314), and one end of the sealing rod (314) is fixedly provided with a rubber block (315).

6. A simple and practical sifter according to claim 5, characterized in that: The inside of the transverse pipe (311) and the surface of the extrusion rod (312) are provided with an extrusion spring (316), one end of the extrusion spring (316) is fixedly connected with one side of the inner wall of the transverse pipe (311), the other end of the extrusion spring (316) is fixedly connected with one side of the sealing block (313), one end of the transverse pipe (311) is provided with a round hole for the extrusion rod (312) to pass through, the round hole is matched with the sealing rod (314), and the surface of the sealing rod (314) is in sliding connection with the inner wall of the round hole.

7. A simple and practical sifter according to claim 1, characterized in that: One end of the chute shell (1) is communicated with a feeding pipe (4), a connecting ring is fixedly installed on the top of the feeding pipe (4), and anti-skid lines are formed on one side of the connecting ring.

8. A simple and practical sifter according to claim 1, characterized in that: The inside of the chute shell (1) is provided with a protection assembly (5), the protection assembly (5) comprises a buffer rod (500) fixedly installed on the inner bottom wall of the chute shell (1), a buffer pipe (501) is arranged on the top of the buffer rod (500), a buffer plate (502) is slidably connected in the buffer pipe (501), the surface of the buffer plate (502) is in sliding connection with the inner wall of the buffer pipe (501), and the buffer plate (502) is matched with the buffer pipe (501).

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

10. A simple and practical sifter according to claim 1, characterized in that: The two sides of the chute shell (1) are fixedly installed with lifting rings, anti-skid lines are formed on the surface of the lifting rings, and the lifting rings are inverted U-shaped.

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