Sandstone sorting and cleaning equipment for civil engineering

Abstract

The invention belongs to the technical field of civil engineering, and discloses civil engineering sandstone sorting and cleaning equipment which comprises a sorting box, a servo motor is fixed to the outer portion of the sorting box, and through cooperation of an engaged belt, a first connecting rod, a first eccentric wheel and other structures, the sorting effect is improved; the device can drive a first connecting rod to rotate through an engaged belt when a servo motor drives a sorting barrel to rotate, then a first eccentric wheel is driven to rotate, the first eccentric wheel extrudes a gas collection block and a piston to move upwards, and when the first eccentric wheel is disengaged, a first reset spring resets the gas collection block and the piston; according to the device, the piston is arranged in the gas collection cylinder, so that the piston reciprocates in the gas collection cylinder to collect gas, and the gas is guided to the gravel discharge port through the flow guide pipe to blow gas to the gravel discharge port so as to blow away gravel accumulated on the gravel discharge port, so that the purpose that the device conveniently blows away the gravel accumulated on the gravel discharge port is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of civil engineering, and specifically relates to a sand and gravel sorting and cleaning device for civil engineering. Background Art

[0002] Sandstone, also known as arenite, is a sedimentary rock formed by the long-term compression and bonding of sand grains and cement under huge pressure due to the crustal movement of the earth; sand and gravel is a common building material, mainly composed of sand and gravel. Sand usually refers to particles with a diameter less than 5 mm, while gravel refers to particles with a diameter greater than 5 mm. Sand and gravel are widely used in the construction industry; sand and gravel need to be cleaned and sorted before use.

[0003] Patent No. CN115430605 discloses a sand and gravel processing separator, including a machine case; a feed bin is installed at the top of the machine case, and the feed bin is inclined; a sieve plate is arranged inside the machine case, and the sieve plate is inclined; two vibrators are installed below the sieve plate through a mounting plate, and the vibrators are connected to the sieve plate; a motor is installed between the two vibrators through a mounting plate, and the motor is connected to the vibrator through a V-belt to make the vibrator perform a rotary motion; on the left side of the sieve plate, a stone outlet is opened on the machine case; a sand outlet is opened on the side wall of the machine case below the vibrator; it also includes a diffusion mechanism, and the diffusion mechanism is arranged above the sieve plate; the present invention is mainly used to solve the problem that when a mixture of sand and gravel and water enters the separator through the feed bin, the mixture that just enters the separator always falls on the same position of the sieve plate, resulting in the accumulation of sand and gravel that just enters the separator on the sieve plate.

[0004] However, when the existing device is in use, it is impossible to handle the gravel accumulated at the gravel outlet. Excessive accumulation of gravel at the outlet will cause the subsequent gravel to be unable to be effectively discharged, and it is necessary to handle the blocked gravel at the outlet. In addition, a large amount of water is required for sand and gravel separation, which will cause waste of water resources, and it is necessary to recycle and reuse the wastewater after cleaning. Summary of the Invention

[0005] To solve the problems raised in the above background art, the present invention provides a sand and gravel sorting and cleaning device for civil engineering.

[0006] To achieve the above object, the present invention provides the following technical solution: A sand and gravel sorting and cleaning device for civil engineering, including a sorting box, a servo motor is fixed outside the sorting box, a sorting cylinder is fixed to the output end of the servo motor, a gravel discharging member is fixed outside the sorting cylinder, a blowing mechanism is installed outside the sorting box, a recycling mechanism is installed inside the sorting box, a filter element is movably connected inside the sorting box, and a disassembly and assembly mechanism is fixed outside the filter element;

[0007] The air blowing mechanism includes an engaged belt, a first connecting rod, and a first eccentric wheel. The engaged belt is sleeved outside the sorting cylinder. The first connecting rod is rotatably connected inside the sorting box, and a first eccentric wheel is fixed to the outside of the first connecting rod.

[0008] The recycling mechanism includes a second eccentric wheel, a first filter screen, and a second filter screen. The second eccentric wheel is fixed to the outside of the first connecting rod. The first filter screen is fixed inside the sorting box, and the second filter screen is slidably connected inside the sorting box.

[0009] The disassembly and assembly mechanism includes a mounting base and a first limiting rod. The mounting base is fixed to the outside of the filter element, and the first limiting rod is fixed to the outside of the mounting base.

[0010] Preferably, an air collecting cylinder is fixed to the outside of the sorting box. A piston is slidably connected inside the air collecting cylinder. A gas collecting block is fixed to the bottom end of the piston. An extension plate is fixed to the outside of the gas collecting block. A first return spring is fixed to the top end of the extension plate. A mounting block is fixed to the top end of the first return spring. A diversion pipe is fixed to the top end of the air collecting cylinder.

[0011] Preferably, the outer wall of the extension plate fits the inner wall of the air collecting cylinder. The extension plate is slidably connected to the air collecting cylinder. There are two groups of extension plates symmetrically distributed about the central axis of the gas collecting block. There are two groups of first return springs symmetrically distributed about the central axis of the extension plate.

[0012] Preferably, the first return spring is used to squeeze the extension plate and keep it in a downward moving trend. The mounting block is fixed to the outside of the air collecting cylinder and is symmetrically distributed about the central axis of the gas collecting block.

[0013] Preferably, a second return spring is fixed to the outside of the second filter screen. A second connecting rod is rotatably connected to the bottom end inside the sorting box. A third eccentric wheel is fixed to the outside of the second connecting rod. A first bevel gear is fixed to the top end of the second connecting rod. A second bevel gear is fixed to the outside of the first connecting rod.

[0014] Preferably, there are two groups of second eccentric wheels. The second return spring is used to squeeze the second filter screen and keep it in an outward moving trend. There are two groups of second return springs symmetrically distributed about the central axis of the second filter screen. The first bevel gear and the second bevel gear are meshed and connected.

[0015] Preferably, a first limiting disc is fixed to the outside of the first limiting rod, a second limiting disc is sleeved on the outside of the first limiting rod, a limiting seat is fixed inside the sorting box, a second limiting rod is movably connected inside the limiting seat, a third return spring is sleeved on the outside of the second limiting rod, and a limiting block is fixed to the outside of the second limiting rod.

[0016] Preferably, there are four groups of the mounting seats, the mounting seats are symmetrically distributed about the central axis of the filter element, the diameter of the first limiting disc is smaller than that of the second limiting disc, the inner wall of the second limiting disc fits the outer wall of the first limiting rod, the second limiting disc and the first limiting rod are slidably connected, and there are four groups of the limiting seats.

[0017] Preferably, there are two groups of the second limiting rods which are symmetrically distributed about the central axis of the limiting seat, the outer wall of the second limiting rod fits the inner wall of the limiting seat, the limiting seat and the second limiting rod are slidably connected, and the third return spring is used to squeeze the second limiting rod and the limiting block and keep them in a moving trend inward.

[0018] Preferably, a gravel discharge port is formed in the outside of the sorting box, a gravel discharge member is fixed to one end of the sorting box, the gravel discharge member is movably connected to the sorting cylinder, a gravel discharge port is installed in the outside of the sorting box, a recovery pump is fixed inside the sorting box, the output end of the recovery pump is communicated with a return pipe, a feeder is arranged outside the sorting box, and the output end of the feeder is arranged inside the sorting cylinder.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] Through the cooperation of structures such as a meshing belt, a first connecting rod, and a first eccentric wheel, when the sorting cylinder rotates driven by a servo motor, the device can drive the first connecting rod to rotate through the meshing belt, and then drive the first eccentric wheel to rotate, so that the first eccentric wheel squeezes the air collecting block and the piston to move upward. When the first eccentric wheel disengages, the first return spring resets the air collecting block and the piston, so that the piston reciprocates inside the air collecting cylinder, thereby collecting air, and guiding the air to the position of the gravel discharge port through a diversion pipe to blow the gravel accumulated on the gravel discharge port, so as to achieve the purpose of facilitating the device to blow the gravel accumulated on the gravel discharge port.

[0021] Through the cooperation of structures such as a second eccentric wheel, a first filter screen, and a second filter screen, the present invention enables the device to drive the second eccentric wheel to rotate when the first connecting rod rotates, causing the second eccentric wheel to contact the first filter screen and generate vibrations, thereby helping the sewage above to fall through the first filter screen. At the same time, the second bevel gear rotates to drive the second connecting rod and the third eccentric wheel to rotate, thereby squeezing the second filter screen, causing the second filter screen to generate vibrations, and then dispersing the water and impurities so that they can be purified after passing through the filter element. After that, they are re-transported to the sorting box through the recovery pump and the return pipe for processing the sandpaper.

[0022] Through the cooperation of structures such as a mounting seat, a first limiting rod, and a first limiting disc, the present invention enables the device to take out the filter element by pressing it when the filter element needs to be replaced or cleaned, and after completing the replacement and / or cleaning, press it for installation, thereby ensuring the filtering performance of the device and making the device more effective in recycling water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic right view structure diagram of the sorting box of the present invention;

[0025] Figure 3 is a schematic structure diagram of the air blowing mechanism of the present invention;

[0026] Figure 4 is of the present invention Figure 3 is a schematic diagram of the enlarged partial cross-section at A in;

[0027] Figure 5 is a schematic front perspective view of the whole of the present invention;

[0028] Figure 6 is a schematic structure diagram of the recovery mechanism of the present invention;

[0029] Figure 7 is a schematic structure diagram of the filter element of the present invention;

[0030] Figure 8 is a schematic structure diagram of the disassembly and assembly mechanism of the present invention.

[0031] In the figure: 1, sorting box; 2, servo motor; 3, sorting cylinder; 4, gravel discharging member; 5, gravel discharge port; 6, crushed stone discharging member; 7, crushed stone discharge port; 8, air blowing mechanism; 801, meshing belt; 802, first connecting rod; 803, first eccentric wheel; 804, air collecting cylinder; 805, air collecting block; 806, piston; 807, extension plate; 808, first return spring; 809, mounting block; 810, diversion pipe; 9, recycling mechanism; 901, second eccentric wheel; 902, first filter screen; 903, second filter screen; 904, second return spring; 905, second connecting rod; 906, third eccentric wheel; 907, first bevel gear; 908, second bevel gear; 10, filter element; 11, disassembly and assembly mechanism; 1101, mounting seat; 1102, first limiting rod; 1103, first limiting disc; 1104, second limiting disc; 1105, limiting seat; 1106, second limiting rod; 1107, third return spring; 1108, limiting block; 12, recycling pump; 13, return pipe; 14, feeder. Detailed implementation mode

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0033] As Figures 1 to 8 shown, the present invention provides a civil engineering sand and gravel sorting and cleaning device, including a sorting box 1, a servo motor 2 is fixed outside the sorting box 1, the output end of the servo motor 2 is fixed with a sorting cylinder 3, a gravel discharging member 4 is fixed outside the sorting cylinder 3, an air blowing mechanism 8 is installed outside the sorting box 1, a recycling mechanism 9 is installed inside the sorting box 1, a filter element 10 is movably connected inside the sorting box 1, a disassembly and assembly mechanism 11 is fixed outside the filter element 10, a gravel discharge port 5 is opened outside the sorting box 1, a crushed stone discharging member 6 is fixed at one end of the sorting box 1, the crushed stone discharging member 6 is movably connected with the sorting cylinder 3, a crushed stone discharge port 7 is installed outside the sorting box 1, a recycling pump 12 is fixed inside the sorting box 1, the output end of the recycling pump 12 is communicated with a return pipe 13, a feeder 14 is arranged outside the sorting box 1, and the output end of the feeder 14 is arranged inside the sorting cylinder 3.

[0034] Adopt the above solution: Add sand and gravel into the interior of the sorting cylinder 3 through the feeder 14. When starting the servo motor 2 to drive the sorting cylinder 3 to rotate, the gravel falls into the interior of the sorting box 1 through the filter holes of the sorting cylinder 3 and is guided to the top of the first filter screen 902 through the slope. When the gravel discharging member 4 rotates, it can collect the gravel and discharge it through the gravel discharge port 5. At this time, the crushed stones inside the sorting cylinder 3 fall into the top of the crushed stone discharging member 6 through the spiral conveying cavity and are discharged through the crushed stone discharge port 7.

[0035] As Figures 1 to 8 shown, the air blowing mechanism 8 includes a meshing belt 801, a first connecting rod 802 and a first eccentric wheel 803. The meshing belt 801 is sleeved outside the sorting cylinder 3. The first connecting rod 802 is rotatably connected inside the sorting box 1. A first eccentric wheel 803 is fixed outside the first connecting rod 802. An air collecting cylinder 804 is fixed outside the sorting box 1. A piston 806 is slidably connected inside the air collecting cylinder 804. A air collecting block 805 is fixed at the bottom end of the piston 806. An extension plate 807 is fixed outside the air collecting block 805. A first return spring 808 is fixed at the top end of the extension plate 807. An installation block 809 is fixed at the top end of the first return spring 808. A diversion pipe 810 is fixed at the top end of the air collecting cylinder 804.

[0036] As Figures 1 to 8 shown, the outer wall of the extension plate 807 fits the inner wall of the air collecting cylinder 804. The extension plate 807 is slidably connected with the air collecting cylinder 804. There are two groups of extension plates 807 symmetrically distributed about the central axis of the air collecting block 805. There are two groups of first return springs 808, which are symmetrically distributed about the central axis of the extension plate 807. The first return spring 808 is used to squeeze the extension plate 807 and keep it in a downward moving trend. The installation block 809 is fixed outside the air collecting cylinder 804 and is symmetrically distributed about the central axis of the air collecting block 805.

[0037] Adopt the above solution: When the servo motor 2 drives the sorting cylinder 3 to rotate, it drives the first connecting rod 802 to rotate through the meshing belt 801, and then drives the first eccentric wheel 803 to rotate, so that the first eccentric wheel 803 squeezes the air collecting block 805 and the piston 806 to move upward. When the first eccentric wheel 803 disengages, the first return spring 808 resets the air collecting block 805 and the piston 806, so that the piston 806 makes a reciprocating motion inside the air collecting cylinder 804, thereby collecting air, and guiding the air to the position of the gravel discharge port 5 through the diversion pipe 810 to blow air at the gravel discharge port 5, thereby blowing away the gravel accumulated on the gravel discharge port 5.

[0038] As Figures 1 to 8As shown in the figure, the recycling mechanism 9 includes a second eccentric wheel 901, a first filter screen 902 and a second filter screen 903. The second eccentric wheel 901 is fixed to the outside of the first connecting rod 802. The first filter screen 902 is fixed inside the sorting box 1. The second filter screen 903 is slidably connected inside the sorting box 1. A second return spring 904 is fixed to the outside of the second filter screen 903. The bottom end inside the sorting box 1 is rotatably connected to a second connecting rod 905. A third eccentric wheel 906 is fixed to the outside of the second connecting rod 905. The top end of the second connecting rod 905 is fixed to a first bevel gear 907. A second bevel gear 908 is fixed to the outside of the first connecting rod 802. There are two sets of second eccentric wheels 901. The second return spring 904 is used to squeeze the second filter screen 903 and keep it in a tendency to move outwards. There are two sets of second return springs 904, which are symmetrically distributed about the central axis of the second filter screen 903. The first bevel gear 907 and the second bevel gear 908 are meshed and connected.

[0039] Adopting the above solution: When the first connecting rod 802 rotates, it drives the second eccentric wheel 901 to rotate, so that the second eccentric wheel 901 contacts the first filter screen 902 to generate vibration, which helps the sewage above to fall through the first filter screen 902. At the same time, the second bevel gear 908 rotates to drive the second connecting rod 905 and the third eccentric wheel 906 to rotate, thereby squeezing the second filter screen 903 to make the second filter screen 903 vibrate, so as to disperse water and impurities and make them pass through the filter element 10 for purification.

[0040] As Figures 1 to 8 As shown in the figure, the disassembly and assembly mechanism 11 includes a mounting base 1101 and a first limiting rod 1102. The mounting base 1101 is fixed to the outside of the filter element 10. A first limiting rod 1102 is fixed to the outside of the mounting base 1101. A first limiting disc 1103 is fixed to the outside of the first limiting rod 1102. A second limiting disc 1104 is sleeved on the outside of the first limiting rod 1102. There are four sets of mounting bases 1101, and the mounting bases 1101 are symmetrically distributed about the central axis of the filter element 10. The diameter of the first limiting disc 1103 is smaller than the diameter of the second limiting disc 1104. The inner wall of the second limiting disc 1104 fits the outer wall of the first limiting rod 1102. The second limiting disc 1104 and the first limiting rod 1102 are slidably connected. There are four sets of limiting seats 1105.

[0041] As Figures 1 to 8As shown in the figure, a limit seat 1105 is fixed inside the sorting box 1. A second limit rod 1106 is movably connected inside the limit seat 1105. A third return spring 1107 is sleeved outside the second limit rod 1106. A limit block 1108 is fixed outside the second limit rod 1106. There are two groups of the second limit rods 1106 symmetrically distributed about the central axis of the limit seat 1105. The outer wall of the second limit rod 1106 is in contact with the inner wall of the limit seat 1105. The limit seat 1105 and the second limit rod 1106 are slidably connected. The third return spring 1107 is used to squeeze the second limit rod 1106 and the limit block 1108 and keep them in a moving trend inward.

[0042] Adopting the above solution: By pressing the filter element 10, the first limit disc 1103 squeezes the limit block 1108, and the limit block 1108 contracts inward. After the first limit disc 1103 passes through, the third return spring 1107 resets the limit block 1108 so that the limit block 1108 is located at the bottom of the first limit disc 1103 to limit the first limit disc 1103, thereby completing the installation of the filter element 10. When it needs to be removed, continue to press the filter element 10 so that the second limit disc 1104 squeezes the limit block 1108, and the limit block 1108 contracts inward. After the second limit disc 1104 passes through, the third return spring 1107 resets the limit block 1108. At this time, the limit block 1108 jacks up the second limit disc 1104 to make the second limit disc 1104 and the first limit disc 1103 fit together. At this time, pulling the filter element 10 can take out the filter element 10.

[0043] Working principle and usage process of the present invention: Sand and gravel are added into the interior of the sorting cylinder 3 through the feeder 14. When the servo motor 2 is started to drive the sorting cylinder 3 to rotate, the gravel falls into the interior of the sorting box 1 through the filter holes of the sorting cylinder 3 and is guided to the top of the first filter screen 902 through the slope. When the gravel discharging member 4 rotates, it can collect the gravel and discharge it through the gravel discharge port 5. At this time, the crushed stones inside the sorting cylinder 3 fall into the top of the crushed stone discharging member 6 through the spiral conveying cavity and are discharged through the crushed stone discharge port 7. And when the servo motor 2 drives the sorting cylinder 3 to rotate, the first connecting rod 802 is driven to rotate through the meshing belt 801, and then the first eccentric wheel 803 is driven to rotate, so that the first eccentric wheel 803 squeezes the air collecting block 805 and the piston 806 to move upward. And when the first eccentric wheel 803 disengages, the first return spring 808 resets the air collecting block 805 and the piston 806, so that the piston 806 reciprocates inside the air collecting cylinder 804, thereby collecting air, and guiding the gas to the position of the gravel discharge port 5 through the diversion pipe 810 to blow air at the gravel discharge port 5, thereby blowing away the gravel accumulated on the gravel discharge port 5. And when the first connecting rod 802 rotates, it drives the second eccentric wheel 901 to rotate, so that the second eccentric wheel 901 contacts the first filter screen 902 to generate vibration, thereby helping the sewage above to fall through the first filter screen 902. At the same time, the second bevel gear 908 rotates to drive the second connecting rod 905 and the third eccentric wheel 906 to rotate, thereby squeezing the second filter screen 903, so that the second filter screen 903 generates vibration, thereby dispersing the water and impurities, and enabling them to be purified after passing through the filter element 10. Press the filter element 10, so that the first limit disk 1103 squeezes the limit block 1108, and the limit block 1108 contracts inward. After the first limit disk 1103 passes through, the third return spring 1107 resets the limit block 1108, so that the limit block 1108 is located at the bottom of the first limit disk 1103 to limit the first limit disk 1103, thereby completing the installation of the filter element 10. When it needs to be removed, continue to press the filter element 10, so that the second limit disk 1104 squeezes the limit block 1108, and the limit block 1108 contracts inward. After the second limit disk 1104 passes through, the third return spring 1107 resets the limit block 1108. At this time, the limit block 1108 jacks up the second limit disk 1104, so that the second limit disk 1104 and the first limit disk 1103 are fitted together. At this time, pulling the filter element 10 can take out the filter element 10.

[0044] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0045] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A civil engineering sand and gravel sorting and cleaning device, comprising a sorting box (1), characterized in that: A servo motor (2) is fixed to the outside of the sorting box (1). A sorting cylinder (3) is fixed to the output end of the servo motor (2). A grit discharging member (4) is fixed to the outside of the sorting cylinder (3). A blowing mechanism (8) is installed on the outside of the sorting box (1). A recovery mechanism (9) is installed inside the sorting box (1). A filter element (10) is movably connected inside the sorting box (1). A disassembly and assembly mechanism (11) is fixed to the outside of the filter element (10). The blowing mechanism (8) includes a meshing belt (801), a first connecting rod (802), and a first eccentric wheel (803). The meshing belt (801) is sleeved on the outside of the sorting cylinder (3). The first connecting rod (802) is rotatably connected inside the sorting box (1). A first eccentric wheel (803) is fixed to the outside of the first connecting rod (802). The recovery mechanism (9) includes a second eccentric wheel (901), a first filter screen (902), and a second filter screen (903). The second eccentric wheel (901) is fixed to the outside of the first connecting rod (802). A first filter screen (902) is fixed inside the sorting box (1). A second filter screen (903) is slidably connected inside the sorting box (1). The disassembly and assembly mechanism (11) includes a mounting seat (1101) and a first limiting rod (1102). The mounting seat (1101) is fixed to the outside of the filter element (10). A first limiting rod (1102) is fixed to the outside of the mounting seat (1101).

2. The civil engineering sand and gravel sorting and cleaning equipment according to claim 1, characterized in that: An air collecting cylinder (804) is fixed to the outside of the sorting box (1). A piston (806) is slidably connected inside the air collecting cylinder (804). An air collecting block (805) is fixed to the bottom end of the piston (806). An extension plate (807) is fixed to the outside of the air collecting block (805). A first return spring (808) is fixed to the top end of the extension plate (807). A mounting block (809) is fixed to the top end of the first return spring (808). A guide pipe (810) is fixed to the top end of the air collecting cylinder (804).

3. The civil engineering sand and gravel sorting and cleaning equipment according to claim 2, characterized in that: The outer wall of the extension plate (807) is in contact with the inner wall of the air collecting cylinder (804). The extension plate (807) is slidably connected to the air collecting cylinder (804). There are two groups of extension plates (807) symmetrically distributed about the central axis of the air collecting block (805). There are two groups of first return springs (808), and the first return springs (808) are symmetrically distributed about the central axis of the extension plate (807).

4. The civil engineering sand and gravel sorting and cleaning equipment according to claim 2, characterized in that: The first return spring (808) is used to squeeze the extension plate (807) and keep it in a downward moving trend. The mounting block (809) is fixed to the outside of the air collecting cylinder (804), and the mounting blocks (809) are symmetrically distributed about the central axis of the air collecting block (805).

5. The civil engineering sand and gravel sorting and cleaning equipment according to claim 1, characterized in that: A second return spring (904) is fixed to the outside of the second filter screen (903). A second connecting rod (905) is rotatably connected to the bottom end inside the sorting box (1). A third eccentric wheel (906) is fixed to the outside of the second connecting rod (905). A first bevel gear (907) is fixed to the top end of the second connecting rod (905). A second bevel gear (908) is fixed to the outside of the first connecting rod (802).

6. The civil engineering sand and gravel sorting and cleaning equipment according to claim 5, characterized in that: There are two sets of the second eccentric wheels (901). The second return spring (904) is used to press the second filter screen (903) and keep it in a tendency to move outward. There are two sets of the second return springs (904) symmetrically distributed about the central axis of the second filter screen (903). The first bevel gear (907) and the second bevel gear (908) are meshed and connected.

7. The civil engineering sand and gravel sorting and cleaning equipment according to claim 1, characterized in that: A first limit disk (1103) is fixed to the outside of the first limit rod (1102). A second limit disk (1104) is sleeved on the outside of the first limit rod (1102). A limit seat (1105) is fixed inside the sorting box (1). A second limit rod (1106) is movably connected inside the limit seat (1105). A third return spring (1107) is sleeved on the outside of the second limit rod (1106). A limit block (1108) is fixed to the outside of the second limit rod (1106).

8. The civil engineering sand and gravel sorting and cleaning equipment according to claim 7, characterized in that: There are four sets of the mounting seats (1101), which are symmetrically distributed about the central axis of the filter element (10). The diameter of the first limit disk (1103) is smaller than that of the second limit disk (1104). The inner wall of the second limit disk (1104) fits the outer wall of the first limit rod (1102). The second limit disk (1104) and the first limit rod (1102) are slidably connected. There are four sets of the limit seats (1105).

9. The civil engineering sand and gravel sorting and cleaning equipment according to claim 7, characterized in that: There are two sets of the second limit rods (1106) symmetrically distributed about the central axis of the limit seat (1105). The outer wall of the second limit rod (1106) fits the inner wall of the limit seat (1105). The limit seat (1105) and the second limit rod (1106) are slidably connected. The third return spring (1107) is used to press the second limit rod (1106) and the limit block (1108) and keep them in a tendency to move inward.

10. The civil engineering sand and gravel sorting and cleaning equipment according to claim 1, characterized in that: A gravel discharge port (5) is opened on the outside of the sorting box (1). A gravel discharging member (6) is fixed to one end of the sorting box (1). The gravel discharging member (6) is movably connected to the sorting cylinder (3). A gravel discharge port (7) is installed on the outside of the sorting box (1). A recovery pump (12) is fixed inside the sorting box (1). The output end of the recovery pump (12) is communicated with a return pipe (13). A feeder (14) is arranged on the outside of the sorting box (1). The output end of the feeder (14) is arranged inside the sorting cylinder (3).

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