An orifice aggregate screen and multi-stage draw system based on ultra-deep shafts

Abstract

This invention discloses an orifice aggregate screen and a multi-stage feeding system based on an ultra-deep vertical shaft. The orifice aggregate screen includes a screen shell, a screen mesh component, and a lifting component. The top and bottom of the screen shell are open. The screen mesh component is swayably connected inside the screen shell. The lifting component is located above the screen shell, and one end of the lifting component is movably connected to the middle of the screen mesh component. The system includes an orifice aggregate screen and several spiral chute sections, which are detachably connected end-to-end. The cross-section of each spiral chute section is square. The orifice aggregate screen is connected to the top of the topmost spiral chute section. The beneficial effect of this invention is that when concrete enters the screen component, it causes the screen to become unbalanced and shake, thus achieving automatic screening, replacing the need for dedicated manual screening, and reducing labor costs.

Description

Technical Field

[0001] This invention relates to the field of engineering construction structures, specifically to an orifice material collection screen and a multi-stage material feeding system based on ultra-deep vertical shafts. Background Technology

[0002] my country has numerous water diversion tunnels, among which water diversion power generation tunnels are generally pressurized tunnels. For high-head, high-drop water diversion power generation tunnels, most are equipped with vertical shafts. These shafts come in various forms, but most consist of three parts: an upper curved section, a straight section, and a lower curved section. The appropriateness of the concrete delivery system is crucial to the successful construction of such high-drop shaft projects.

[0003] Currently, concrete sieves are installed at the inlet of the concrete feeding system to screen out large-diameter aggregates from the concrete delivered by the mixer truck. When concrete is fed into the feeding system, a worker uses a handheld tool to pry the concrete through the sieve's openings, resulting in high labor intensity for workers and increased labor costs. Summary of the Invention

[0004] The technical problem to be solved by this invention is that currently, the process of feeding concrete from the sieve holes of a concrete sieve into a feeding system requires the assistance of a dedicated person, which results in high labor costs. The purpose is to provide a sieve with an orifice and a multi-stage feeding system based on an ultra-deep vertical shaft, which causes the sieve to become unbalanced and shake when concrete enters the sieve components, thereby achieving automatic sieving and replacing the need for dedicated manual sieving, thus reducing labor costs.

[0005] This invention is achieved through the following technical solution:

[0006] An orifice collecting screen includes a screen housing, a screen mesh component, and a lifting component. The top and bottom of the screen housing are open. The screen mesh component is swayably connected inside the screen housing. The lifting component is located above the screen housing, and one end of the lifting component is movably connected to the middle of the screen mesh component.

[0007] The beneficial effects of this invention are as follows: by setting both the top and bottom of the sieve shell open, concrete can easily enter from the top of the sieve shell and from the bottom into the multi-stage feeding system. The screen component is then swayably connected inside the sieve shell, allowing concrete from the mixer truck to directly enter the screen component. When concrete enters the screen component, it causes imbalance and swaying, ensuring that concrete particles smaller than the screen aperture diameter enter the feeding system. This prevents excessively large aggregates from segregating in the feeding system, ensuring concrete quality and preventing segregation. Furthermore, by setting a suspension component above the sieve shell, with its free end slidably connected to the middle of the screen component, the suspension component provides tension to the screen component, ensuring it does not fall during concrete screening. This achieves automatic swaying screening, replacing manual screening and reducing labor costs. The orifice sieve of this invention also has the advantages of simple structure, low production difficulty, and low production cost.

[0008] In some embodiments, the screen component includes an elastic leak-proof screen and a bottom concrete screen. One side of the elastic leak-proof screen is continuously connected to the perimeter of the bottom concrete screen, and the other side is continuously connected to the inner wall of the screen housing. By setting the elastic leak-proof screen and continuously connecting its two sides to the perimeter of the bottom concrete screen and the inner wall of the screen housing, the elasticity of the screen ensures that the bottom concrete screen can automatically sway during concrete screening, while preventing concrete from falling directly from the outside of the bottom concrete screen into the multi-stage feeding system.

[0009] In some embodiments, the area of ​​the bottom concrete screen is smaller than the cavity area of ​​the screen shell cross-section at the swaying space of the bottom concrete screen. The bottom concrete screen is generally square or circular in shape, and the cross-section of the screen shell is generally square or circular. By making the area of ​​the bottom concrete screen smaller than the cavity area of ​​the screen shell cross-section at the swaying space of the bottom concrete screen, it is easier to ensure the swaying space of the bottom concrete screen within the screen shell and to ensure the swaying amplitude of the bottom concrete screen, so as to achieve automatic screening of concrete during swaying.

[0010] In some embodiments, the bottom concrete screen includes several screen rods, each with a circular cross-section. The screen rods are arranged side-by-side, forming elongated screen holes. The screen rods are made of circular reinforcing bars or circular steel pipes. By arranging the screen rods side-by-side, the gaps between them form elongated screen holes for screening concrete. Using circular reinforcing bars or circular steel pipes reduces the contact area between the screen rods and the concrete in the screen holes, thus improving the efficiency of concrete screening.

[0011] In some embodiments, the elastic leak-proof screen gradually tilts towards the center of the inner side of the screen housing from top to bottom. When the bottom concrete screen is sifting concrete, the elastic leak-proof screen is in a folded state along the height direction of the screen housing. The screen holes of the elastic leak-proof screen are square holes, and the elastic leak-proof screen is made of rubber or silicone. By gradually tilting the elastic anti-leakage screen from top to bottom towards the center of the inner side of the sieve shell, a certain distance is maintained between the elastic anti-leakage screen and the inner wall of the bottom concrete sieve shell. This ensures that the bottom concrete sieve has sufficient shaking space and concrete screening space. When the bottom concrete sieve is screening concrete, the elastic anti-leakage screen is folded along the height direction of the sieve shell. When the bottom concrete sieve shakes, the elastic anti-leakage screen does not exert any tension on the bottom concrete sieve, or exerts only a small tension, ensuring optimal shaking effect. Furthermore, the screen holes of the elastic anti-leakage screen are set to square holes, and the elastic anti-leakage screen is made of rubber or silicone to ensure sufficient elasticity and minimize the tension generated when the bottom concrete sieve shakes, further ensuring optimal shaking effect.

[0012] In some embodiments, the lifting component includes a support frame and a tie rod. The support frame is generally n-shaped, with its bottom ends connected to the top of the sieve housing. One end of the tie rod is connected to the middle of the support frame, and the other end is spherically hinged to the center of the bottom concrete sieve. By providing support to the tie rod through the support frame and hinged the free end of the support rod to the center of the bottom concrete sieve, the bottom concrete sieve can be made to sway at the hinge. When concrete enters the bottom concrete sieve, it causes the bottom concrete sieve to become unbalanced, thus automatically swaying the sieve and screening out large-diameter aggregates in the concrete.

[0013] In some embodiments, the lifting component includes a support frame, a tie rod, a guide rod, and a compression spring. The support frame is generally n-shaped, with its bottom ends connected to the top of the sieve housing. One end of the tie rod is connected to the middle of the support frame, and the other end is fixedly connected to the guide rod. Both the compression spring and the bottom concrete sieve are slidably mounted on the guide rod. A gap is provided between the guide rod and the connection hole on the bottom concrete sieve, and the bottom concrete sieve is located at the upper end of the compression spring. By fixing one end of the guide rod to the free end of the tie rod, and slidably mounting the bottom concrete sieve and the compression spring on the guide rod from top to bottom, with a gap between the guide rod and the connection hole on the bottom concrete sieve, the bottom concrete sieve can swing within the gap between the connection hole and the guide rod, achieving automatic concrete screening. Furthermore, by using the compression spring, the restoring force of the compression spring causes the bottom concrete sieve to vibrate up and down (shaking the concrete), further improving the concrete screening effect.

[0014] In some embodiments, a screen hinge portion is provided at one end of the guide rod near the pull rod. The screen hinge portion is composed of several spherical balls connected end to end. The bottom concrete screen is slidably fitted onto the screen hinge portion. The thickness of the connecting hole on the bottom concrete screen is 0.2 to 0.3 times the diameter of the spherical balls, and the diameter of the connecting hole is larger than the diameter of the spherical balls. By providing a screen hinge portion composed of several spherical balls connected end to end at one end of the guide rod near the pull rod, and setting the thickness of the connecting hole that mates with the screen hinge portion to be 0.2 to 0.3 times the diameter of the spherical balls, the gap between one or both ends of the connecting hole and the spherical balls is increased. This allows the bottom concrete screen to swing with a greater amplitude than when it is fitted with a columnar structure, thereby improving the efficiency of concrete brushing.

[0015] In some embodiments, the compression spring is a conical compression spring, the small end of which is slidably fitted onto the hinge portion of the screen. A semi-circular protrusion structure is provided on the bottom concrete screen, located at the lower end of the connecting hole. The semi-circular protrusion structure has a clearance hole coaxial with the connecting hole, the diameter of which is larger than the diameter of the connecting hole. The small end of the conical compression spring abuts against the semi-circular protrusion structure. By setting the compression spring to a conical shape and having its small end abut against the semi-circular protrusion structure on the bottom concrete screen, the contact area between the spring and the bottom concrete screen is reduced, increasing the swing amplitude of the bottom concrete screen. Furthermore, the cooperation between the semi-circular protrusion and the circular cavity ensures the continuity of the bottom concrete screen's swing, allowing large-diameter crushed stone to move systematically and improving the screening effect.

[0016] This invention also provides a multi-stage material feeding system based on an ultra-deep vertical shaft, including an orifice aggregate screen and several spiral chute sections. The spiral chute sections are detachably connected end-to-end, and each spiral chute section has a square cross-section. The orifice aggregate screen is connected to the top of the uppermost spiral chute section. By using several spiral chute sections, which are detachably connected end-to-end, and by designing the chute as a spiral shape, the concrete drop speed is reduced, preventing segregation of concrete during high-drop placement. Furthermore, the square cross-section of the spiral chute sections facilitates assembly and fixation to the supporting formwork, reducing the difficulty of installing the spiral chute sections.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] 1. The support frame provides support for the tie rod and hinges the free end of the support rod to the center of the bottom concrete screen, so as to ensure that the bottom concrete screen can swing at the hinge. When concrete enters the bottom concrete screen, it causes the bottom concrete screen to become unbalanced, and then the bottom concrete screen will automatically swing. This automatic shaking of the concrete screen filters out large-diameter stones in the concrete, replacing the need for dedicated manual screening and reducing labor costs.

[0019] 2. The orifice screen of the present invention also has the advantages of simple structure, low production difficulty and low production cost.

[0020] 3. When concrete is being screened by the bottom concrete screen, the elastic anti-leakage screen is folded along the height direction of the screen shell. When the bottom concrete screen shakes, the elastic anti-leakage screen does not exert any tension on the bottom concrete screen, or exerts only a small tension, to ensure that the bottom concrete screen has the best shaking effect.

[0021] 4. By fixing one end of the guide rod to the free end of the pull rod, and slidably mounting the bottom concrete screen and compression spring on the guide rod from top to bottom, a gap is provided between the guide rod and the connection hole of the bottom concrete screen, so that the bottom concrete screen can swing within the gap space between the connection hole of the bottom concrete screen and the guide rod. In addition, by setting the compression spring, the restoring force of the compression spring is used to make the bottom concrete screen vibrate up and down, and the vibration of the compression spring further improves the screening effect of concrete.

[0022] 5. By setting up an elastic anti-leakage screen and continuously connecting both sides of the elastic anti-leakage screen to the perimeter of the bottom concrete screen and a ring on the inner wall of the screen shell, the elasticity of the screen ensures that the bottom concrete screen can automatically shake when screening concrete, while also preventing concrete from falling directly from the outside of the bottom concrete screen into the multi-stage feeding system. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0024] Figure 1 This is a structural diagram of the present invention;

[0025] Figure 2 This is a partial structural diagram of the present invention;

[0026] Figure 3 For the present invention Figure 2 Structural diagram viewed from below;

[0027] Figure 4 This is a partial structural diagram of the present invention;

[0028] Figure 5 This is a structural diagram of the present invention when the compression spring is set to a conical shape;

[0029] Figure 6 For the present invention Figure 5 The structural diagram after removing the compression spring;

[0030] Figure 7 For the present invention Figure 3 A magnified view of section K in the middle.

[0031] The attached diagram shows the markings and corresponding component names:

[0032] The material screen housing 10, connecting plate 11, support frame 13, pull rod 14, guide rod 15, screen hinge part 151, elastic leak-proof screen 20, bottom concrete screen 21, screen rod 211, compression spring 22, limiting plate 23, and semi-circular protrusion structure 24. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0034] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] In the description of this invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0036] The terms "first," "second," etc., used in this invention are merely for clarity of description and are not intended to limit any order or emphasize importance. Furthermore, the term "connection" as used herein, unless otherwise specified, can refer to a direct connection or an indirect connection via other components. Example

[0037] This invention provides an orifice collecting screen, see below. Figures 1-7 The invention includes a sieve housing 10, a screen component, and a lifting component. The sieve housing 10 has open tops and bottoms. The screen component is swayably connected inside the sieve housing 10. The lifting component is located above the sieve housing 10, with one end movably connected to the middle of the screen component. By setting the lifting component above the sieve housing 10 and slidably connecting its free end to the middle of the screen component, the lifting component provides tension to the screen component, ensuring that the screen component will not fall during concrete sieving. This achieves automatic swaying sieving, replacing manual sieving and reducing labor costs. The orifice sieve of the present invention also has the advantages of simple structure, low production difficulty, and low production cost.

[0038] See Figure 1The screen component includes an elastic leak-proof screen 20 and a bottom concrete screen 21. One side of the elastic leak-proof screen 20 is continuously connected to the perimeter of the bottom concrete screen 21, and the other side is continuously connected to the inner wall of the screen housing 10. By setting the elastic leak-proof screen 20 and continuously connecting both sides of the elastic leak-proof screen 20 to the perimeter of the bottom concrete screen 21 and the inner wall of the screen housing 10, the elasticity of the elastic leak-proof screen 20 ensures that the bottom concrete screen 21 can automatically sway when screening concrete, while also preventing concrete from falling directly from the outside of the bottom concrete screen 21 into the multi-stage feeding system.

[0039] See Figure 1 and Figure 2 The area of ​​the bottom concrete screen 21 is smaller than the cavity area of ​​the screen housing 10 in the swaying space of the bottom concrete screen 21. The bottom concrete screen 21 is generally square or circular plate-shaped, and the cross-section of the screen housing 10 is generally square or circular. By making the area of ​​the bottom concrete screen 21 smaller than the cavity area of ​​the screen housing 10 in the swaying space of the bottom concrete screen 21, it is easier to ensure the swaying space of the bottom concrete screen 21 within the screen housing 10, and to ensure the swaying amplitude of the bottom concrete screen 21, so as to achieve automatic screening of concrete during swaying.

[0040] See Figure 1 and Figure 2 The bottom concrete screen 21 includes several screen rods 211, each with a circular cross-section. These screen rods 211 are arranged side-by-side, forming elongated screen holes. The screen rods 211 are made of circular steel bars or circular steel pipes. By arranging the screen rods 211 side-by-side, the gaps between them form elongated screen holes for screening concrete. Using circular steel bars or circular steel pipes for the screen rods reduces the contact area between the screen rods and the concrete in the screen holes, thus improving the efficiency of concrete screening.

[0041] See Figure 1The elastic leak-proof screen 20 gradually tilts towards the center of the inner side of the screen shell 10 from top to bottom. When the bottom concrete screen 21 is screening concrete, the elastic leak-proof screen 20 is in a folded state along the height direction of the screen shell 10. The screen holes of the elastic leak-proof screen 20 are square holes. The elastic leak-proof screen 20 is made of rubber or silicone. By gradually tilting the elastic anti-leakage screen 20 towards the inner center of the sieve housing 10 from top to bottom, a certain distance is maintained between the elastic anti-leakage screen 20 and the inner wall of the sieve housing 10 at the bottom concrete screen 21. This ensures that the bottom concrete screen 21 has sufficient shaking space and concrete screening space. When the bottom concrete screen 21 is screening concrete, the elastic anti-leakage screen 20 is folded along the height direction of the sieve housing 10. When the bottom concrete screen 21 shakes, the elastic anti-leakage screen 20 does not exert any tension on the bottom concrete screen 21, or exerts only a small tension, to ensure that the bottom concrete screen 21 has the best shaking effect. Furthermore, the screen holes of the elastic anti-leakage screen 20 are set to square holes, and the elastic anti-leakage screen 20 is made of rubber or silicone to ensure that the elastic anti-leakage screen 20 has sufficient elasticity and generates less tension when the bottom concrete screen 21 shakes, further ensuring that the bottom concrete screen 21 has the best shaking effect.

[0042] See Figure 1 The lifting component includes a support frame 13 and a tie rod 14. The support frame 13 is generally n-shaped, with its bottom ends connected to the top of the material screen housing 10. One end of the tie rod 14 is connected to the middle of the support frame 13, and the other end is spherically hinged to the center of the bottom concrete screen 21. By setting the support frame 13 to provide support for the tie rod 14 and hinged the free end of the support rod to the center of the bottom concrete screen 21, it is easy to ensure that the bottom concrete screen 21 can swing at the hinge. When concrete enters the bottom concrete screen 21, it causes the bottom concrete screen 21 to become unbalanced, and then the bottom concrete screen 21 automatically swings, automatically shaking the concrete and screening large-diameter stones in the concrete. Specifically, the lower end of the tie rod 14 can be set as a chain, so that when removing large-diameter stones, the bottom concrete screen 21 can be moved upward by pulling the chain to remove the large-diameter stones. The spherical hinge in this invention consists of two parts: a spherical head and a seat, which are connected by a spherical contact surface. This is a conventional method in the art and will not be described in detail here.

[0043] See Figures 1-5The lifting component includes a support frame 13, a tie rod 14, a guide rod 15, and a compression spring 22. The support frame 13 is generally n-shaped, and its bottom two ends are respectively connected to the top of the material screen housing 10. One end of the tie rod 14 is connected to the middle of the support frame 13, and the other end is fixedly connected to the guide rod 15. The compression spring 22 and the bottom concrete screen 21 can be slidably sleeved on the guide rod 15. There is a gap between the guide rod 15 and the connecting hole on the bottom concrete screen 21. The bottom concrete screen 21 is located at the upper end of the compression spring 22. By fixing one end of the guide rod 15 to the free end of the pull rod 14, and slidably mounting the bottom concrete screen 21 and the compression spring 22 on the guide rod 15 from top to bottom, and by setting a gap between the guide rod 15 and the connecting hole on the bottom concrete screen 21, the bottom concrete screen 21 can swing within the gap between the connecting hole of the bottom concrete screen 21 and the guide rod 15, thereby achieving automatic concrete screening. Furthermore, by setting the compression spring 22, the restoring force of the compression spring 22 causes the bottom concrete screen 21 to vibrate up and down, and the vibration of the compression spring 22 further improves the screening effect of concrete.

[0044] Specifically, the upper end of the guide rod 15 in this invention can be configured as a chain structure connected by several spheres, so that the connecting holes of the bottom concrete screen 21 form a structure similar to a spherical hinge, thereby increasing the shaking amplitude of the bottom concrete screen 21 on the basis of having a vibration effect, so as to further improve the concrete screening effect.

[0045] See Figure 4 In this invention, the compression spring 22 can be configured as a long strip or a conical compression spring 22. When configured as a conical compression spring 22, the small end of the conical compression spring 22 is connected to the pull rod 14 to reduce the contact area between the compression spring 22 and the bottom concrete screen 21 and increase the swaying amplitude of the bottom concrete screen 21.

[0046] See Figures 3-4 A limiting plate 23 is provided at the end of the guide rod 15 away from the pull rod 14, and the limiting plate 23 abuts against the bottom of the compression spring 22. By providing the limiting plate 23, a supporting force is provided to the compression spring 22.

[0047] See Figures 3-4The system also includes connecting plates 11, of which at least two are provided. The two connecting plates 11 are respectively connected to the outer side of the material screen housing 10 and located on opposite sides of the material screen housing 10. Each connecting plate 11 has connecting holes through which bolts pass to connect to the top of the discharge pipe. By providing connecting plates 11, the connection between the connecting plates 11 and the material screen housing 10 is facilitated, making installation and disassembly convenient and improving the versatility of the orifice material collection screen.

[0048] See Figure 5 and Figure 6 The guide rod 15 has a screen hinge part 151 near the pull rod 14. The screen hinge part 151 is composed of several spherical balls connected end to end. The bottom concrete screen 21 is slidably fitted onto the screen hinge part 151. The thickness of the connecting hole on the bottom concrete screen 21 is 0.2 to 0.3 times the diameter of the spherical balls, and the diameter of the connecting hole is larger than the diameter of the spherical balls. By providing a screen hinge part 151 composed of several spherical balls connected end to end at the end of the guide rod 15 near the pull rod 14, and setting the thickness of the connecting hole that mates with the screen hinge part 151 to be 0.2 to 0.3 times the diameter of the spherical balls, the gap between one or both ends of the connecting hole and the spherical balls is increased. This allows the bottom concrete screen 21 to swing with a larger amplitude than when it is fitted with a columnar structure, thereby improving the efficiency of concrete brushing.

[0049] See Figure 3 and 7 The compression spring 22 is a conical compression spring 22, the small end of which is slidably fitted onto the screen hinge portion 151. A semi-circular protrusion structure 24 is provided on the bottom concrete screen 21, located at the lower end of the connecting hole. The semi-circular protrusion structure 24 has a clearance hole coaxial with the connecting hole, the diameter of which is larger than the diameter of the connecting hole. The small end of the conical compression spring 22 abuts against the semi-circular protrusion structure 24. By making the compression spring 22 conical and having its small end abut against the semi-circular protrusion structure 24 on the bottom concrete screen 21, the contact area between the spring and the bottom concrete screen 21 is reduced, increasing the swing amplitude of the bottom concrete screen 21. Furthermore, the cooperation between the semi-circular protrusion and the circular cavity ensures the continuity of the bottom concrete screen 21's swing, allowing large-diameter crushed stone to move regularly and improving the screening effect. Example

[0050] This invention also provides a multi-stage material feeding system based on an ultra-deep vertical shaft, including an orifice aggregate screen and several spiral chute sections. The spiral chute sections are detachably connected end-to-end, and each spiral chute section has a square cross-section. The orifice aggregate screen is connected to the top of the uppermost spiral chute section. By using several spiral chute sections, which are detachably connected end-to-end, and by designing the chute as a spiral shape, the concrete drop speed is reduced, preventing segregation of concrete during high-drop placement. Furthermore, the square cross-section of the spiral chute sections facilitates assembly and fixation to the supporting formwork, reducing the difficulty of installing the spiral chute sections.

[0051] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An orifice aggregate screen, characterized by, include: The screen housing has open top and bottom. A screen component, which is swayably connected inside the screen housing; A lifting component is located above the outer shell of the material screen, and one end of the lifting component is movably connected to the middle of the screen component; the screen component includes an elastic leak-proof screen and a bottom concrete screen, one side of the elastic leak-proof screen is continuously connected to the perimeter of the bottom concrete screen, and the other side is continuously connected to the inner wall of the outer shell of the material screen. The lifting component includes a support frame, a tie rod, a guide rod, and a compression spring. The support frame is generally n-shaped, and its bottom two ends are respectively connected to the top of the material screen shell. One end of the tie rod is connected to the middle of the support frame, and the other end is fixedly connected to the guide rod. The compression spring and the bottom concrete screen can be slidably sleeved on the guide rod. There is a gap between the guide rod and the connection hole on the bottom concrete screen. The bottom concrete screen is located at the upper end of the compression spring. The guide rod is provided with a screen hinge at one end near the pull rod. The screen hinge is composed of several circular balls connected end to end. The bottom concrete screen is slidably fitted on the screen hinge. The thickness of the connecting hole on the bottom concrete screen is 0.2 to 0.3 times the diameter of the circular ball, and the diameter of the connecting hole is larger than the diameter of the circular ball. The compression spring is a conical compression spring, and the small end of the conical compression spring is slidably sleeved on the hinge part of the screen. A semi-circular protrusion structure is provided on the bottom concrete screen. The semi-circular protrusion structure is located at the lower end of the connecting hole. A clearance hole coaxial with the connecting hole is provided on the semi-circular protrusion structure. The diameter of the clearance hole is larger than the diameter of the connecting hole. The small end of the conical compression spring abuts against the semi-circular protrusion structure.

2. The orifice collection screen according to claim 1, characterized in that, The area of ​​the bottom concrete screen is smaller than the cavity area of ​​the screen shell cross-section in the space where the bottom concrete screen can shake. The bottom concrete screen is generally square or circular plate-shaped, and the cross-section of the screen shell is generally square or circular.

3. The orifice collecting screen according to claim 1, characterized in that, The bottom concrete screen includes several screen rods, each with a circular cross-section. The screen rods are arranged side by side, forming elongated screen holes. The screen rods are made of steel bars or steel pipes.

4. The orifice collection screen according to claim 1, characterized in that, The elastic leak-proof screen gradually tilts towards the center of the inner side of the screen shell from top to bottom. When the bottom concrete screen screens the concrete, the elastic leak-proof screen is in a folded state along the height direction of the screen shell. The screen holes of the elastic leak-proof screen are square holes. The elastic leak-proof screen is made of rubber or silicone.

5. A multi-stage material feeding system based on ultra-deep vertical shafts, characterized in that, The device includes an orifice collecting screen as described in any one of claims 1-4, and several spiral chute sections, wherein the spiral chute sections are detachably connected end to end in sequence, and the cross-section of each spiral chute section is square. The orifice collecting screen is connected to the top of the spiral chute section located at the topmost point.

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