A multi-mode adjustable hydraulic aggregate preparation system

Abstract

This utility model relates to the technical field of hydraulic aggregate preparation systems, specifically to a multi-mode adjustable hydraulic aggregate preparation system. The system includes a coarse crushing mechanism, a dual-mold medium crushing mechanism, a primary screening component, a secondary screening component, a sand making and shaping mechanism, a sand washing mechanism, a sand making mechanism, large stone finished product bins, medium stone finished product bins, small stone finished product bins, a dry sand bin, and a wet sand bin. The coarse crushing mechanism is connected to the dual-mold medium crushing mechanism; the dual-mold medium crushing mechanism is connected to the primary screening component; in the primary screening component, its oversized stone outlet is connected to the dual-mold medium crushing mechanism, its first large stone outlet is connected to the large stone finished product bin or to the dual-mold medium crushing mechanism, its second outlet is connected to the sand making and shaping mechanism, and its third outlet is connected to the sand washing mechanism; the sand making and shaping mechanism is connected to the secondary screening component; the first dry sand outlet of the sand making mechanism is connected to the dry sand bin, while its diversion outlet is connected to the sand washing mechanism. The system has a multi-mode adjustment function.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic aggregate preparation systems, specifically to a multi-mode adjustable hydraulic aggregate preparation system. Background Technology

[0002] Hydropower projects are an important means of ensuring the safe and stable operation of the power system. They have multiple functions such as peak shaving, valley filling, frequency regulation, phase regulation, energy storage, emergency backup, and black start. They are an important support for building a modern smart grid and a new type of power system, and an important component of building a clean, low-carbon, safe, reliable, intelligent, flexible, economical and efficient new power system.

[0003] Hydropower projects have high requirements for concrete quality and a wide variety of finished product types. Regarding finished product types, the hydraulic aggregate preparation system produces large stones (40-80mm), medium stones (20-40mm), small stones (5-20mm), granulated stones (5-15mm), sand for conventional concrete, and sand for roller-compacted concrete, etc. In terms of quality requirements, the finished aggregates produced by the hydraulic aggregate preparation system should meet the requirements of the "DLT 5144-2015 Specification for Construction of Hydraulic Concrete". In addition, to meet the high quality requirements of concrete in water conservancy and hydropower projects, the industry also hopes that hydraulic aggregate preparation systems will have multi-mode adjustment functions. For example, the system should be able to choose whether to produce large stones according to the needs of different construction stages; the system should be required to have functions for adjusting powder content and fineness modulus. Specifically, the manufactured sand produced at different construction stages includes two types: rolled sand and normal sand. The powder content of normal sand is 6%~18%, and that of rolled sand is 15%~22%; the fineness modulus should be below 2.8; if the demand for manufactured sand production capacity is large during peak construction periods, the system should be able to meet the large supply demand of manufactured sand during peak periods, while minimizing the production of manufactured sand during off-peak periods; if water conservancy and hydropower projects require the production of gravel aggregate, and the demand is unpredictable, the system should be able to choose whether to produce gravel aggregate while producing other graded crushed stone.

[0004] Existing conventional sand and gravel aggregate preparation systems cannot meet the aforementioned multi-mode adjustment functions. Therefore, developing a multi-mode adjustable hydraulic sand and gravel aggregate preparation system is of paramount importance. Utility Model Content

[0005] The purpose of this utility model is to provide a multi-mode adjustable hydraulic aggregate preparation system, the specific technical solution of which is as follows:

[0006] A multi-mode adjustable hydraulic aggregate preparation system includes a coarse crushing mechanism, a dual-mode medium crushing mechanism, a primary screening component, a secondary screening component, a sand making and shaping mechanism, a sand washing mechanism, a sand making mechanism, a large stone finished product silo, a medium stone finished product silo, a small stone finished product silo, a dry sand silo, and a wet sand silo.

[0007] The discharge end of the coarse crushing mechanism is connected to the feed end of the dual-mold intermediate crushing mechanism via a first belt conveyor;

[0008] The discharge end of the dual-mold crushing mechanism is connected to the feed end of the primary screening component via a second belt conveyor.

[0009] The discharge end of the primary screening component includes an oversized stone discharge port, a first large stone discharge port, a second discharge port, and a third discharge port arranged sequentially in descending order of sand particle size. The oversized stone discharge port is connected to the dual-mold intermediate crushing mechanism via a third belt conveyor, used to return oversized stone sand with a particle size greater than 80mm to the dual-mold intermediate crushing mechanism for further intermediate crushing. The first large stone discharge port is connected to the large stone finished product silo via a fourth belt conveyor or to the dual-mold intermediate crushing mechanism via a third belt conveyor, used to transport large stone sand with a particle size of 40~80mm to the large stone finished product silo or return it to the dual-mold intermediate crushing mechanism for further intermediate crushing. The second discharge port is connected to the sand making and shaping mechanism via a fifth belt conveyor, used to transport sand with a particle size of 3~40mm to the sand making and shaping mechanism for shaping and sand making. The third discharge port is connected to the sand washing mechanism via a sixth belt conveyor, used to transport sand with a particle size of less than 3mm to the sand washing mechanism.

[0010] The discharge end of the sand making and shaping mechanism is connected to the feed end of the secondary screening component via a seventh belt conveyor.

[0011] The discharge end of the secondary screening component includes a medium stone discharge port, a small stone discharge port, a fourth discharge port, and a fifth discharge port arranged sequentially in descending order of sand particle size. The medium stone discharge port is connected to the medium stone finished product silo via an eighth belt conveyor, used to transport medium stone sand with a particle size of 20-40mm to the medium stone finished product silo. The small stone discharge port is connected to the small stone finished product silo via a ninth belt conveyor, used to transport small stone sand with a particle size of 5-20mm to the small stone finished product silo. The fourth discharge port is connected to the sand making mechanism via a tenth belt conveyor, used to transport sand with a particle size of 3-5mm to the sand making mechanism for crushing and sand making. The fifth discharge port is connected to the sand washing mechanism via an eleventh belt conveyor, used to transport sand with a particle size of less than 3mm to the sand washing mechanism.

[0012] The sand making mechanism includes a first dry sand discharge end and a diversion discharge end; the first dry sand discharge end is connected to the dry sand silo via a twelfth belt conveyor, and is used to transport the dry sand produced by the sand making mechanism to the dry sand silo; the diversion discharge end is connected to the discharge end of the sand washing mechanism via a bidirectional belt conveyor, and is used to transport a portion of the dry sand produced by the sand making mechanism and the wet sand produced by the sand washing mechanism to the wet sand silo after mixing on the bidirectional belt conveyor, or to transport a portion of the dry sand produced by the sand making mechanism and the dry sand produced by the sand washing mechanism to the dry sand silo after mixing on the bidirectional belt conveyor.

[0013] Optionally, the primary screening component includes a first upper screen, a first middle screen, and a first lower screen arranged sequentially from top to bottom; the aperture of the first upper screen is 80 mm; the aperture of the first middle screen is 40 mm; and the aperture of the first lower screen is 3 mm.

[0014] Optionally, the primary screening component further includes a first distribution hopper; the inlet of the first distribution hopper is connected to the first large stone outlet for receiving large stone and sand with a particle size of 40~80mm; the outlet of the first distribution hopper includes a first openable discharge chute and a second openable discharge chute; the first openable discharge chute is connected to the large stone finished product silo via the fourth belt conveyor; the second openable discharge chute is connected to the dual-mold intermediate crushing mechanism via the third belt conveyor.

[0015] Optionally, the secondary screening component includes a second upper screen, a second middle screen, and a second lower screen arranged sequentially from top to bottom; the aperture of the second upper screen is 20 mm; the aperture of the second middle screen is 5 mm; and the aperture of the second lower screen is 3 mm.

[0016] Optionally, the dual-mode intermediate crushing mechanism includes a second distribution hopper, a single-cylinder hydraulic cone crusher, and an impact crusher; the inlet of the second distribution hopper is connected to the outlet of the coarse crushing mechanism via a first belt conveyor, and its outlet includes a third openable discharge chute and a fourth openable discharge chute; the third openable discharge chute is connected to the single-cylinder hydraulic cone crusher; and the fourth openable discharge chute is connected to the impact crusher.

[0017] Optionally, the coarse crushing mechanism includes a first feeder and a jaw crusher; the feed end of the first feeder is used to receive sand raw materials, and its discharge end is connected to the feed end of the jaw crusher; the discharge end of the jaw crusher is connected to the feed end of the dual-mold intermediate crushing mechanism through the first belt conveyor.

[0018] Optionally, the sand making and shaping mechanism includes a receiving hopper, a second feeder, and a vertical shaft impact crusher; the feeding end of the receiving hopper is connected to the second discharge port via the fifth belt conveyor, and is used to receive sand with a particle size of 3~40mm, while its discharge end is connected to the feeding end of the vertical shaft impact crusher via the second feeder; the discharge end of the vertical shaft impact crusher is connected to the feeding end of the secondary screening component via the seventh belt conveyor.

[0019] Optionally, the sand washing mechanism includes a feeding belt conveyor, a third hopper, a sand washing and recovery device, a sand washing and discharge belt conveyor, a dry sand discharge belt conveyor, and a collection conveyor belt conveyor. The receiving end of the feeding belt conveyor is connected to the third discharge port via the sixth belt conveyor and to the fifth discharge port via the eleventh belt conveyor, for receiving sand with a particle size of less than 3mm. The discharge end of the feeding belt conveyor is connected to the inlet of the third hopper. The discharge port of the third hopper includes a fifth openable discharge chute and a sixth openable discharge chute. The fifth openable discharge chute is connected to the inlet of the sand washing and recovery device. The discharge end of the sand washing and recovery device is connected to the bidirectional belt conveyor via the sand washing and discharge belt conveyor and the collection conveyor belt conveyor in sequence. The sixth openable discharge chute is connected to the bidirectional belt conveyor via the dry sand discharge belt conveyor and the collection conveyor belt conveyor in sequence.

[0020] Optionally, the multi-mode adjustable hydraulic aggregate preparation system further includes a gravel vibrating screen and a gravel finished product silo. The gravel vibrating screen is installed in the gravel finished product silo and is used to screen small stones with a particle size of 5-20mm into gravel with a particle size of 5-15mm and sand with a particle size of 15-20mm. The discharge end of the gravel vibrating screen includes a gravel discharge end and a sand discharge end with a particle size of 15-20mm. The gravel discharge end is connected to the gravel finished product silo via a gravel discharge belt conveyor and is used to transport the gravel with a particle size of 5-15mm to the gravel finished product silo. The sand discharge end with a particle size of 15-20mm is connected to the sand making mechanism via a transfer belt conveyor and is used to transport the sand with a particle size of 15-20mm to the sand making mechanism for crushing and sand making.

[0021] Optionally, an openable discharge port is provided at the bottom of the large stone finished product silo, the medium stone finished product silo, the small stone finished product silo, the dry sand silo, the wet sand silo, and the rice stone finished product silo; the discharge end of the discharge port is connected to the mixing station through a weighing and metering feeder.

[0022] The application of the technical solution of this utility model has at least the following beneficial effects:

[0023] (1) The present invention provides a multi-mode adjustable hydraulic aggregate preparation system, which can realize the switching production of tertiary crushed stone and secondary crushed stone, the switching production of normal sand and crushed sand, the control of fineness modulus of manufactured sand and the control of powder content of manufactured sand in the hydraulic concrete aggregate preparation project. Specifically, a coarse crushing mechanism is used for initial crushing of the sand raw materials; a double-mold medium crushing mechanism is used for intermediate crushing of the initially crushed sand; a primary screening component is used to screen the sand in descending order of particle size to separate ultra-large stone sand with a particle size greater than 80mm, large stone sand with a particle size of 40-80mm, sand with a particle size of 3-40mm, and sand with a particle size of less than 3mm; among these, the ultra-large stone sand is returned to the double-mold medium crushing mechanism for further medium crushing; the large stone sand is conveyed to the large stone finished product silo or returned to the double-mold medium crushing mechanism for further medium crushing; the sand with a particle size of 3-40mm is conveyed to the sand making and shaping mechanism for shaping and sand making; the sand with a particle size of less than 3mm is conveyed to the sand washing mechanism to produce wet sand or dry sand according to production needs. This wet sand or dry sand and the dry sand produced by the sand making mechanism are transported bidirectionally by a bidirectional belt conveyor. After being mixed, the sand is transported to a wet or dry sand silo. A two-stage screening assembly is used to screen the shaped sand again, specifically screening out medium-sized sand with a particle size of 20-40mm, small-sized sand with a particle size of 5-20mm, sand with a particle size of 3-5mm, and sand with a particle size of less than 3mm. Among them, the medium-sized sand with a particle size of 20-40mm is transported to the medium-sized finished product silo; the medium-sized sand with a particle size of 5-20mm is transported to the small-sized finished product silo; the sand with a particle size of 3-5mm is transported to the sand making mechanism for crushing and sand making, i.e., producing dry sand, which is then transported to the dry sand silo; the sand with a particle size of less than 3mm is transported to the sand washing mechanism, producing wet or dry sand according to production needs. The wet or dry sand is mixed with the dry sand produced by the sand making mechanism through bidirectional movement of a bidirectional belt conveyor and then transported to the wet or dry sand silo. Therefore, based on the coarse crushing mechanism and the dual-mode medium crushing mechanism, this utility model combines a primary screening component, a secondary screening component, and a sand making and shaping mechanism to achieve the switching production of three-grade crushed stone (i.e., large stone, medium stone, and small stone) and two-grade crushed stone (i.e., medium stone and small stone). Furthermore, the combination of a sand making mechanism and a sand washing mechanism enables the switching production of normal sand and crushed sand as well as the control of the powder content of manufactured sand. Conveying sand with a particle size of 3~5mm to the sand making mechanism for crushing and sand making enables the control of the fineness modulus of manufactured sand.

[0024] (2) The present invention sets up a gravel vibrating screen in the small stone finished material bin, which can screen small stone sand with a particle size of 5~20mm into gravel sand with a particle size of 5~15mm and sand with a particle size of 15~20mm. Among them, the gravel sand with a particle size of 5~15mm is transported to the gravel finished material bin by the gravel discharge belt conveyor to meet the demand of gravel aggregate production for water conservancy and hydropower construction; while the sand with a particle size of 15~20mm is transported to the sand making mechanism by the transfer belt conveyor to increase the dry sand production.

[0025] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of a multi-mode adjustable hydraulic aggregate preparation system in the embodiment;

[0028] Figure 2 This is a schematic diagram of the dual-mode crushing mechanism in the embodiment;

[0029] Figure 3 This is a schematic diagram of the structure of the primary screening component in the embodiment;

[0030] Figure 4 This is a schematic diagram of the structure of the primary screening component and the secondary screening component in the embodiment;

[0031] Figure 5 This is a schematic diagram of the sand making and shaping mechanism in the embodiment;

[0032] Figure 6 This is a schematic diagram of the sand washing mechanism in the embodiment;

[0033] The components include: 1. Coarse crushing mechanism; 2. Double-mold intermediate crushing mechanism; 2.1. Secondary feeding hopper; 2.2. Single-cylinder hydraulic cone crusher; 2.3. Impact crusher; 3. Primary screening assembly; 3.1. First upper screen; 3.2. First middle screen; 3.3. First lower screen; 3.4. First feeding hopper; 4. Secondary screening assembly; 5. Sand making and shaping mechanism; 5.1. Receiving bin; 5.2. Secondary feeder; 5.3. Vertical shaft impact crusher. 6. Sand washing mechanism, 6.1. Feeding belt conveyor, 6.2. Third distribution hopper, 6.3. Sand washing and recycling equipment, 6.4. Sand washing discharge belt conveyor, 6.5. Dry sand discharge belt conveyor, 6.6. Collecting conveyor belt conveyor, 7. Sand making mechanism, 8. Large stone finished product silo, 9. Medium stone finished product silo, 10. Small stone finished product silo, 11. Dry sand silo, 12. Wet sand silo, 13. Bidirectional belt conveyor, 14. Gravel vibrating screen, 15. Gravel finished product silo. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0035] Example:

[0036] See Figures 1-6 A multi-mode adjustable hydraulic sand and gravel aggregate preparation system includes a coarse crushing mechanism 1, a dual-mode medium crushing mechanism 2, a primary screening component 3, a secondary screening component 4, a sand making and shaping mechanism 5, a sand washing mechanism 6, a sand making mechanism 7, a large stone finished product bin 8, a medium stone finished product bin 9, a small stone finished product bin 10, a dry sand bin 11, and a wet sand bin 12.

[0037] The discharge end of the coarse crushing mechanism 1 is connected to the feed end of the dual-mold intermediate crushing mechanism 2 via a first belt conveyor;

[0038] The discharge end of the dual-mold crushing mechanism 2 is connected to the feed end of the primary screening component 3 via a second belt conveyor;

[0039] The discharge end of the primary screening component 3 includes an oversized stone discharge port, a first oversized stone discharge port, a second discharge port, and a third discharge port arranged in descending order of sand particle size. The oversized stone discharge port is connected to the dual-mold intermediate crushing mechanism 2 via a third belt conveyor, and is used to return oversized stone sand with a particle size greater than 80mm to the dual-mold intermediate crushing mechanism 2 for further intermediate crushing. The first oversized stone discharge port is connected to the oversized stone finished product silo 8 via a fourth belt conveyor or to the dual-mold intermediate crushing mechanism via a third belt conveyor. Mechanism 2 is connected to convey large stone and sand materials with a particle size of 40~80mm to the large stone finished material silo 8 or return the material to the double-mold intermediate crushing mechanism 2 for secondary intermediate crushing; the second discharge port is connected to the sand making and shaping mechanism 5 via the fifth belt conveyor, and is used to convey sand materials with a particle size of 3~40mm to the sand making and shaping mechanism 5 for shaping and sand making; the third discharge port is connected to the sand washing mechanism 6 via the sixth belt conveyor, and is used to convey sand materials with a particle size of less than 3mm to the sand washing mechanism 6;

[0040] The discharge end of the sand making and shaping mechanism 5 is connected to the feed end of the secondary screening component 4 via a seventh belt conveyor.

[0041] The discharge end of the secondary screening component 4 includes a medium stone discharge port, a small stone discharge port, a fourth discharge port, and a fifth discharge port arranged in descending order of sand particle size. The medium stone discharge port is connected to the medium stone finished product silo 9 via an eighth belt conveyor, and is used to transport medium stone sand with a particle size of 20-40mm to the medium stone finished product silo 9. The small stone discharge port is connected to the small stone finished product silo 10 via a ninth belt conveyor, and is used to transport small stone sand with a particle size of 5-20mm to the small stone finished product silo 10. The fourth discharge port is connected to the sand making mechanism 7 via a tenth belt conveyor, and is used to transport sand with a particle size of 3-5mm to the sand making mechanism 7 for crushing and sand making. The fifth discharge port is connected to the sand washing mechanism 6 via an eleventh belt conveyor, and is used to transport sand with a particle size of less than 3mm to the sand washing mechanism 6.

[0042] The sand making mechanism 7 includes a first dry sand discharge end and a diversion discharge end; the first dry sand discharge end is connected to the dry sand silo 11 via a twelfth belt conveyor, and is used to transport the dry sand produced by the sand making mechanism 7 to the dry sand silo 11; the diversion discharge end is connected to the discharge end of the sand washing mechanism 6 via a bidirectional belt conveyor 13, and is used to mix part of the dry sand produced by the sand making mechanism 7 and the wet sand produced by the sand washing mechanism 6 on the bidirectional belt conveyor 13 and then transport them to the wet sand silo 12, or to mix part of the dry sand produced by the sand making mechanism 7 and the dry sand produced by the sand washing mechanism 6 on the bidirectional belt conveyor 13 and then transport them to the dry sand silo 11.

[0043] See Figure 3The primary screening component 3 includes a first upper screen 3.1, a first middle screen 3.2, and a first lower screen 3.3 arranged sequentially from top to bottom. The first upper screen 3.1 has an aperture of 80 mm and is used to screen out oversized stones and sand with a particle size greater than 80 mm. The first middle screen 3.2 has an aperture of 40 mm and is used to screen out large stones and sand with a particle size of 40-80 mm. The first lower screen 3.3 has an aperture of 3 mm and is used to screen out sand with a particle size of 3-40 mm. The sand passing through the first lower screen 3.3 is sand with a particle size of less than 3 mm.

[0044] See Figure 3 The primary screening component 3 further includes a first distribution hopper 3.4; the inlet of the first distribution hopper 3.4 is connected to the first large stone outlet for receiving large stone and sand with a particle size of 40~80mm; the outlet of the first distribution hopper 3.4 includes a first openable discharge trough (such as a removable baffle plate on the discharge trough; specifically, a guide channel is opened on the discharge trough, and the baffle plate can be removably installed along the guide channel to realize the opening and closing of the discharge trough) and a second openable discharge trough (the opening and closing method is the same as the first openable discharge trough); the first openable discharge trough is connected to the large stone finished product silo 8 through the fourth belt conveyor; the second openable discharge trough is connected to the double-mold intermediate crushing mechanism 2 through the third belt conveyor.

[0045] In the production of large, medium and small stones (i.e., the production of three-grade crushed stone), the second openable discharge chute, the third belt conveyor and the double-mold medium crushing mechanism 2 are closed, and the first openable discharge chute and the fourth belt conveyor are opened to transport large stone sand with a particle size of 40~80mm to the large stone finished product silo 8.

[0046] In the production of medium and small stones (i.e., the production of secondary crushed stone), the first openable discharge chute and the fourth belt conveyor are closed, and the second openable discharge chute, the third belt conveyor and the double-mold medium crushing mechanism 2 are opened, so that the large stone and sand material with a particle size of 40~80mm is returned to the double-mold medium crushing mechanism 2 for secondary crushing.

[0047] See Figure 4 The secondary screening component 4 includes a second upper screen, a second middle screen, and a second lower screen arranged sequentially from top to bottom. The second upper screen has a pore size of 20 mm and is used to screen out medium-sized stone and sand with a particle size of 20-40 mm. The second middle screen has a pore size of 5 mm and is used to screen out small stone and sand with a particle size of 5-20 mm. The second lower screen has a pore size of 3 mm and is used to screen out sand with a particle size of 3-5 mm. The sand passing through the second lower screen is sand with a particle size of less than 3 mm.

[0048] See Figure 2 The dual-mode intermediate crushing mechanism 2 includes a second distribution hopper 2.1, a single-cylinder hydraulic cone crusher 2.2, and an impact crusher 2.3. The inlet of the second distribution hopper 2.1 is connected to the outlet of the coarse crushing mechanism 1 via a first belt conveyor, and its outlet includes a third openable discharge chute (opening and closing method is the same as the first openable discharge chute) and a fourth openable discharge chute (opening and closing method is the same as the first openable discharge chute). The third openable discharge chute is connected to the single-cylinder hydraulic cone crusher 2.2; the fourth openable discharge chute is connected to the impact crusher 2.3.

[0049] In the operation of producing large, medium and small stones (i.e., producing three-grade crushed stone), the third openable discharge chute and the single-cylinder hydraulic cone crusher 2.2 are closed, and the fourth openable discharge chute and the impact crusher 2.3 are opened to complete the operation.

[0050] In the production of medium and small stones (i.e., the production of secondary aggregate crushed stone), the fourth openable discharge chute and the impact crusher 2.3 are closed, and the third openable discharge chute and the single-cylinder hydraulic cone crusher 2.2 are opened to complete the operation.

[0051] The coarse crushing mechanism 1 includes a first feeder and a jaw crusher; the feed end of the first feeder is used to receive sand raw materials, and its discharge end is connected to the feed end of the jaw crusher; the discharge end of the jaw crusher is connected to the feed end of the dual-mold intermediate crushing mechanism 2 through the first belt conveyor.

[0052] See Figure 5 The sand making and shaping mechanism 5 includes a receiving bin 5.1, a second feeder 5.2, and a vertical shaft impact crusher 5.3. The feeding end of the receiving bin 5.1 is connected to the second discharge port via the fifth belt conveyor, and is used to receive sand with a particle size of 3~40mm. Its discharge end is connected to the feeding end of the vertical shaft impact crusher 5.3 via the second feeder 5.2. The discharge end of the vertical shaft impact crusher 5.3 is connected to the feeding end of the secondary screening component 4 via the seventh belt conveyor.

[0053] See Figure 6The sand washing mechanism 6 includes a feeding belt conveyor 6.1, a third distribution hopper 6.2, a sand washing and recovery device 6.3, a sand washing and discharge belt conveyor 6.4, a dry sand discharge belt conveyor 6.5, and a collection conveyor belt conveyor 6.6. The receiving end of the feeding belt conveyor 6.1 is connected to the third discharge port via the sixth belt conveyor and to the fifth discharge port via the eleventh belt conveyor, for receiving sand with a particle size of less than 3mm. The discharge end of the feeding belt conveyor 6.1 is connected to the inlet of the third distribution hopper 6.2. The third distribution hopper 6.2... The discharge port includes a fifth openable discharge chute (opening and closing method is the same as the first openable discharge chute) and a sixth openable discharge chute (opening and closing method is the same as the first openable discharge chute); the fifth openable discharge chute is connected to the feed end of the sand washing and recycling equipment 6.3; the discharge end of the sand washing and recycling equipment 6.3 is connected to the bidirectional belt conveyor 13 via the sand washing discharge belt conveyor 6.4 and the material collection conveyor belt conveyor 6.6 in sequence; the sixth openable discharge chute is connected to the bidirectional belt conveyor 13 via the dry sand discharge belt conveyor 6.5 and the material collection conveyor belt conveyor 6.6 in sequence.

[0054] See Figure 1 The multi-mode adjustable hydraulic aggregate preparation system further includes a gravel vibrating screen 14 and a gravel finished product silo 15. The gravel vibrating screen 14 is installed in the small stone finished product silo 10 and is used to screen small stone and sand with a particle size of 5~20mm into gravel and sand with a particle size of 5~15mm and sand with a particle size of 15~20mm. The discharge end of the gravel vibrating screen 14 includes a gravel discharge end and a sand discharge end with a particle size of 15~20mm. The gravel discharge end is connected to the gravel finished product silo 15 through a gravel discharge belt conveyor and is used to transport the gravel and sand with a particle size of 5~15mm to the gravel finished product silo 15. The sand discharge end with a particle size of 15~20mm is connected to the sand making mechanism 7 through a transfer belt conveyor and is used to transport the sand with a particle size of 15~20mm to the sand making mechanism 7 for crushing and sand making.

[0055] Each of the large stone finished product silo 8, the medium stone finished product silo 9, the small stone finished product silo 10, the dry sand silo 11, the wet sand silo 12, and the grain stone finished product silo 15 is equipped with an openable and closable discharge port (the opening and closing method is the same as the first openable and closable discharge chute); the discharge end of the discharge port is connected to the mixing plant via a weighing and metering feeder. Alternatively, loading vehicles can be used to directly shovel and load the sand from the large stone finished product silo 8, the medium stone finished product silo 9, the small stone finished product silo 10, the dry sand silo 11, the wet sand silo 12, and the grain stone finished product silo 15.

[0056] The multi-mode adjustable hydraulic aggregate preparation system enables the switching between the production of tertiary and tertiary crushed stone, the switching between the production of conventional sand and compacted sand, the control of the fineness modulus of manufactured sand, and the control of the powder content of manufactured sand in hydraulic concrete aggregate preparation projects. Specifically, the operating principle of the multi-mode adjustable hydraulic aggregate preparation system is as follows:

[0057] First, the sand raw material is initially crushed using a coarse crushing mechanism 1;

[0058] Secondly, a dual-mode intermediate crushing mechanism 2 is used to perform intermediate crushing on the initially crushed sand.

[0059] Then, the primary screening component 3 sequentially screens out the following sand materials in descending order of particle size: oversized stone sand with a particle size greater than 80mm, large stone sand with a particle size of 40-80mm, sand with a particle size of 3-40mm, and sand with a particle size of less than 3mm. Among these, the oversized stone sand is returned to the double-mold intermediate crushing mechanism 2 for further intermediate crushing; the large stone sand is transported to the large stone finished product silo 8 or returned to the double-mold intermediate crushing mechanism 2 for further intermediate crushing; the sand with a particle size of 3-40mm is transported to the sand making and shaping mechanism 5 for shaping and sand making; and the sand with a particle size of less than 3mm is transported to the sand washing mechanism 6 to produce wet sand or dry sand according to production needs. The wet sand or dry sand is mixed with the dry sand produced by the sand making mechanism 7 by the bidirectional movement of the bidirectional belt conveyor 13 and then transported to the wet sand silo 12 or the dry sand silo 11.

[0060] Finally, the shaped sand is screened again using a secondary screening component 4, specifically screening out medium-sized sand with a particle size of 20-40mm, small-sized sand with a particle size of 5-20mm, sand with a particle size of 3-5mm, and sand with a particle size of less than 3mm. Among them, the medium-sized sand with a particle size of 20-40mm is transported to the medium-sized finished product silo 9; the medium-sized sand with a particle size of 5-20mm is transported to the small-sized finished product silo 10; the sand with a particle size of 3-5mm is transported to the sand making mechanism 7 for crushing and sand making, i.e., producing dry sand, which is then transported to the dry sand silo 11; the sand with a particle size of less than 3mm is transported to the sand washing mechanism 6, producing wet sand or dry sand according to production needs. The wet sand or dry sand is mixed with the dry sand produced by the sand making mechanism 7 by the bidirectional movement of the bidirectional belt conveyor 13 and then transported to the wet sand silo 12 or the dry sand silo 11.

[0061] Therefore, based on the coarse crushing mechanism 1 and the dual-mode medium crushing mechanism 2, this embodiment combines a primary screening component 3, a secondary screening component 4, and a sand making and shaping mechanism 5 to achieve the switching production of three-grade crushed stone (i.e., large stone, medium stone, and small stone) and two-grade crushed stone (i.e., medium stone and small stone). Furthermore, the combination of a sand making mechanism 7 and a sand washing mechanism 6 can achieve the switching production of normal sand and crushed sand as well as the control of the powder content of manufactured sand. Conveying sand with a particle size of 3~5mm to the sand making mechanism 7 for crushing and sand making can achieve the control of the fineness modulus of manufactured sand.

[0062] In addition, in this embodiment, a gravel vibrating screen 14 is set in the small stone finished material silo 10, which can screen small stone and sand with a particle size of 5~20mm into gravel and sand with a particle size of 5~15mm and sand with a particle size of 15~20mm. Among them, the gravel and sand with a particle size of 5~15mm is transported to the gravel finished material silo 15 by the gravel discharge belt conveyor to meet the demand for gravel aggregate production in water conservancy and hydropower construction; while the sand with a particle size of 15~20mm is transported to the sand making unit 7 by the transfer belt conveyor to increase the dry sand production.

[0063] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-mode adjustable hydraulic aggregate preparation system, characterized in that, It includes a coarse crushing mechanism (1), a double-mold medium crushing mechanism (2), a primary screening component (3), a secondary screening component (4), a sand making and shaping mechanism (5), a sand washing mechanism (6), a sand making mechanism (7), a large stone finished product silo (8), a medium stone finished product silo (9), a small stone finished product silo (10), a dry sand silo (11), and a wet sand silo (12). The discharge end of the coarse crushing mechanism (1) is connected to the feed end of the double-mold intermediate crushing mechanism (2) via a first belt conveyor; The discharge end of the dual-mode crushing mechanism (2) is connected to the feed end of the primary screening component (3) via a second belt conveyor; The discharge end of the primary screening component (3) includes an oversized stone discharge port, a first large stone discharge port, a second discharge port, and a third discharge port arranged in descending order of sand particle size. The oversized stone discharge port is connected to the double-mold intermediate crushing mechanism (2) via a third belt conveyor, and is used to return oversized stone sand with a particle size greater than 80mm to the double-mold intermediate crushing mechanism (2) for further intermediate crushing. The first large stone discharge port is connected to the large stone finished product silo (8) via a fourth belt conveyor or to the double-mold intermediate crushing mechanism (2) via a third belt conveyor, and is used to transport large stone sand with a particle size of 40~80mm to the large stone finished product silo (8) or return it to the double-mold intermediate crushing mechanism (2) for further intermediate crushing. The second discharge port is connected to the sand making and shaping mechanism (5) via the fifth belt conveyor, and is used to transport sand with a particle size of 3~40mm to the sand making and shaping mechanism (5) for shaping and sand making; the third discharge port is connected to the sand washing mechanism (6) via the sixth belt conveyor, and is used to transport sand with a particle size of less than 3mm to the sand washing mechanism (6); The discharge end of the sand making and shaping mechanism (5) is connected to the feed end of the secondary screening component (4) via the seventh belt conveyor; The discharge end of the secondary screening component (4) includes a medium stone discharge port, a small stone discharge port, a fourth discharge port, and a fifth discharge port arranged in descending order of sand particle size. The medium stone discharge port is connected to the medium stone finished product silo (9) via an eighth belt conveyor and is used to transport medium stone sand with a particle size of 20-40mm to the medium stone finished product silo (9). The small stone discharge port is connected to the small stone finished product silo (10) via a ninth belt conveyor and is used to transport small stone sand with a particle size of 5-20mm to the small stone finished product silo (10). The fourth discharge port is connected to the sand making mechanism (7) via a tenth belt conveyor and is used to transport sand with a particle size of 3-5mm to the sand making mechanism (7) for crushing and sand making. The fifth discharge port is connected to the sand washing mechanism (6) via an eleventh belt conveyor and is used to transport sand with a particle size of less than 3mm to the sand washing mechanism (6). The sand making mechanism (7) includes a first dry sand discharge end and a diversion discharge end; the first dry sand discharge end is connected to the dry sand silo (11) via a twelfth belt conveyor, and is used to transport the dry sand produced by the sand making mechanism (7) to the dry sand silo (11); the diversion discharge end is connected to the discharge end of the sand washing mechanism (6) via a bidirectional belt conveyor (13), and is used to transport a portion of the dry sand produced by the sand making mechanism (7) and the wet sand produced by the sand washing mechanism (6) to the wet sand silo (12) after mixing on the bidirectional belt conveyor (13), or to transport a portion of the dry sand produced by the sand making mechanism (7) and the dry sand produced by the sand washing mechanism (6) to the dry sand silo (11) after mixing on the bidirectional belt conveyor (13).

2. The multi-mode adjustable hydraulic aggregate preparation system according to claim 1, characterized in that, The primary screening component (3) includes a first upper screen (3.1), a first middle screen (3.2), and a first lower screen (3.3) arranged sequentially from top to bottom; the aperture of the first upper screen (3.1) is 80 mm; the aperture of the first middle screen (3.2) is 40 mm; and the aperture of the first lower screen (3.3) is 3 mm.

3. The multi-mode adjustable hydraulic aggregate preparation system according to claim 1, characterized in that, The primary screening component (3) further includes a first distribution hopper (3.4); the inlet of the first distribution hopper (3.4) is connected to the first large stone outlet and is used to collect large stone sand with a particle size of 40~80mm; the outlet of the first distribution hopper (3.4) includes a first openable discharge trough and a second openable discharge trough; the first openable discharge trough is connected to the large stone finished product silo (8) through the fourth belt conveyor; the second openable discharge trough is connected to the double-mold intermediate crushing mechanism (2) through the third belt conveyor.

4. The multi-mode adjustable hydraulic aggregate preparation system according to claim 1, characterized in that, The secondary screening component (4) includes a second upper screen, a second middle screen, and a second lower screen arranged sequentially from top to bottom; the aperture of the second upper screen is 20 mm; the aperture of the second middle screen is 5 mm; and the aperture of the second lower screen is 3 mm.

5. The multi-mode adjustable hydraulic aggregate preparation system according to claim 1, characterized in that, The dual-mode intermediate crushing mechanism (2) includes a second distribution hopper (2.1), a single-cylinder hydraulic cone crusher (2.2), and an impact crusher (2.3); the inlet of the second distribution hopper (2.1) is connected to the outlet of the coarse crushing mechanism (1) via a first belt conveyor, and its outlet includes a third openable discharge chute and a fourth openable discharge chute; the third openable discharge chute is connected to the single-cylinder hydraulic cone crusher (2.2); and the fourth openable discharge chute is connected to the impact crusher (2.3).

6. The multi-mode adjustable hydraulic aggregate preparation system according to claim 1, characterized in that, The coarse crushing mechanism (1) includes a first feeder and a jaw crusher; the feed end of the first feeder is used to receive sand raw materials, and its discharge end is connected to the feed end of the jaw crusher; the discharge end of the jaw crusher is connected to the feed end of the double-mold intermediate crushing mechanism (2) through the first belt conveyor.

7. The multi-mode adjustable hydraulic aggregate preparation system according to claim 1, characterized in that, The sand making and shaping mechanism (5) includes a receiving bin (5.1), a second feeder (5.2), and a vertical shaft impact crusher (5.3). The feeding end of the receiving bin (5.1) is connected to the second discharge port through the fifth belt conveyor, and is used to receive sand with a particle size of 3~40mm. Its discharge end is connected to the feeding end of the vertical shaft impact crusher (5.3) through the second feeder (5.2). The discharge end of the vertical shaft impact crusher (5.3) is connected to the feeding end of the secondary screening component (4) through the seventh belt conveyor.

8. The multi-mode adjustable hydraulic aggregate preparation system according to claim 1, characterized in that, The sand washing mechanism (6) includes a feeding belt conveyor (6.1), a third distribution hopper (6.2), a sand washing and recovery device (6.3), a sand washing and discharge belt conveyor (6.4), a dry sand discharge belt conveyor (6.5), and a collection conveyor belt conveyor (6.6). The receiving end of the feeding belt conveyor (6.1) is connected to the third discharge port via the sixth belt conveyor and to the fifth discharge port via the eleventh belt conveyor, for receiving sand with a particle size of less than 3mm. The discharge end of the feeding belt conveyor (6.1) is connected to the feed end of the third distribution hopper (6.2). The discharge port of the third hopper (6.2) includes a fifth openable discharge trough and a sixth openable discharge trough; the fifth openable discharge trough is connected to the feed end of the sand washing and recycling equipment (6.3); the discharge end of the sand washing and recycling equipment (6.3) is connected to the bidirectional belt conveyor (13) via the sand washing discharge belt conveyor (6.4) and the collection conveyor belt conveyor (6.6) in sequence; the sixth openable discharge trough is connected to the bidirectional belt conveyor (13) via the dry sand discharge belt conveyor (6.5) and the collection conveyor belt conveyor (6.6) in sequence.

9. The multi-mode adjustable hydraulic aggregate preparation system according to any one of claims 1 to 8, characterized in that, It also includes a gravel vibrating screen (14) and a gravel finished product silo (15); the gravel vibrating screen (14) is set in the small stone finished product silo (10) and is used to screen small stone sand with a particle size of 5~20mm into gravel sand with a particle size of 5~15mm and sand with a particle size of 15~20mm; the discharge end of the gravel vibrating screen (14) includes a gravel discharge end and a sand discharge end with a particle size of 15~20mm; the gravel discharge end is connected to the gravel finished product silo (15) through a gravel discharge belt conveyor and is used to transport the gravel sand with a particle size of 5~15mm to the gravel finished product silo (15); the sand discharge end with a particle size of 15~20mm is connected to the sand making mechanism (7) through a transfer belt conveyor and is used to transport the sand with a particle size of 15~20mm to the sand making mechanism (7) for crushing and sand making.

10. The multi-mode adjustable hydraulic aggregate preparation system according to claim 9, characterized in that, A closable discharge port is provided at the bottom of the large stone finished material silo (8), the medium stone finished material silo (9), the small stone finished material silo (10), the dry sand silo (11), the wet sand silo (12), and the rice stone finished material silo (15); the discharge end of the discharge port is connected to the mixing station through a weighing and metering feeder.

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