Method and device for manufacturing concrete precast block from sea sand

Abstract

The invention discloses a method and device for manufacturing a concrete precast block from sea sand, and the method specifically comprises the following steps: preparing raw materials: using 300 parts of sea sand as fine aggregate, and selecting proper 200 parts of coarse aggregate, 800 parts of gravel, 150 parts of admixture, 130 parts of water, 400 parts of cement, 15 parts of water reducing agent and 10 parts of reinforcing steel bar corrosion inhibitor additive; wherein the admixture comprises a mixture of fly ash and slag, plant fibers and silica fume, and the coarse aggregate is river sand; and purification treatment of the sea sand: carrying out purification treatment on the sea sand before use. According to the method and device for manufacturing the concrete precast block through the sea sand, the coal ash and the slag act at the same time, the chloride ion permeation resisting effect on the sea sand concrete in the later period is higher, the sea sand can improve the impermeability and carbonization resistance of the concrete, the crack resistance and freezing resistance of the concrete can be finitely improved by adding the fibers, and the concrete precast block has the advantages of being simple in structure and convenient to use. The silica fume can improve the freezing resistance of the sea and mountain concrete to a certain extent.

Description

Technical Field

[0001] The invention relates to the technical field of concrete, and in particular to a method and a device for making prefabricated concrete blocks with sea sand. Background Art

[0002] The use of sea sand in concrete has become an unavoidable reality in coastal areas. Currently, the technical treatment methods for reducing the salt concentration of sea sand are relatively weak, and mainly rely on the desalination treatment carried out by sea sand suppliers.

[0003] With the growing development of the construction industry, the amount of river sand mined has increased day by day, and river sand resources have gradually become increasingly scarce, even directly leading to the suspension of work at some construction sites and the doubling of river sand prices.

[0004] However, concrete suppliers only have the single method of adding a certain amount of steel bar rust inhibitor during mixing. This often makes the quality of concrete uncontrollable due to the fluctuation of the dilution effect of the sea sand supplier. For concrete in contact with water, such as the underground structure of buildings or structures, chloride ions often cause corrosion of steel bars, and alkaline aggregate reactions caused by alkaline metal ions such as sodium ions and potassium ions, resulting in damage or even collapse of underground structures at a time far below the service life of the buildings or structures, with very serious consequences. Summary of the invention

[0005] The invention discloses a method and a device for making a prefabricated concrete block by using sea sand, aiming to solve the technical problems raised in the background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A method for making prefabricated concrete blocks using sea sand, comprising the following steps:

[0008] Step 1: Raw material preparation: Use 300 parts of sea sand as fine aggregate, and select appropriate 200 parts of coarse aggregate, 800 parts of crushed stone, 150 parts of admixture, 130 parts of water, 400 parts of cement, 15 parts of water reducer and 10 parts of steel bar rust inhibitor additive, wherein the admixture includes fly ash and slag mixture, plant fiber and silica fume, and the coarse aggregate is river sand;

[0009] Step 2: Purification of sea sand: Sea sand should be purified before use, and the salt and impurities in it should be removed by washing with fresh water to ensure the performance of concrete;

[0010] Step 3: Mix design: Determine the optimal mix ratio of concrete, with a water-cement ratio of 0.44-0.47 to ensure the strength and durability of the concrete;

[0011] Step 4: Concrete mixing: Use a twin-shaft forced mixer to mix to ensure the uniformity of the concrete. The mixing time is controlled within 60-90 seconds to ensure the slump and workability of the concrete.

[0012] Step 5: pouring and molding: pouring the mixed concrete into the twisted king-shaped mold (2), vibrating or compacting it to remove air bubbles using a defoaming mechanism to form the desired prefabricated block shape;

[0013] Step 6: Curing and quality inspection: After pouring, the precast concrete blocks are cured to promote hardening and quality inspection is carried out in accordance with relevant standards, including tests on durability, carbonation resistance and frost resistance;

[0014] Step 7: Anti-rust treatment: Take anti-rust measures for steel bars that need to be exposed.

[0015] By purifying the sea sand and then adding the sea sand particles to the concrete mixture, the chloride ions contained in the sea sand are reduced, making it less likely to affect the strength and durability of the concrete mixture, thereby making the strength and durability of the concrete using sea sand as aggregate better; by simultaneously acting on fly ash and slag, the sea sand concrete will have a stronger resistance to chloride ion penetration in the later stage, sea sand will improve the concrete's impermeability and carbonization resistance, the addition of fibers can improve the concrete's crack resistance and frost resistance to a limited extent, and silica fume can improve the frost resistance of seamount concrete to a certain extent.

[0016] The pre-treatment of sea sand only requires the use of concrete additives such as cement, water, reducing agents, and steel bar rust inhibitor additives as treatment materials. It is low-cost and conducive to improving economic value. The treated sea sand particles are not likely to have compatibility problems with the cement in the concrete mixture, so it is not easy to affect the strength performance of the concrete. As a result, sea sand can be directly used to replace river sand, which is conducive to better alleviating the problem of shortage of river sand resources.

[0017] In a preferred embodiment, a twisting W-shaped mold is included, and the outer walls at both ends of the twisting W-shaped mold are respectively fixedly connected with side support plates, and the side support plates are penetrated with observation ports, the outer walls of the side support plates are connected with side sealing plates through hinges, and the side sealing plates cover the outer walls of the observation ports and are connected to the side support plates through bolts, the side support plates at both ends can be connected to side limit mechanisms and driving mechanisms, one of the side support plates can be connected to a spraying mechanism and a defoaming mechanism through a driving mechanism, the outer periphery of the twisting W-shaped mold is provided with an edge seal, The screw holes on the edge seal are movably interspersed with a hanger, and can be connected to the crane arm through the hanger, the top of the twist king-shaped mold is covered with a covering plate, a leakage hole is penetrated at one end of the twist king-shaped mold, and the leakage hole is fixedly covered with a first sealing plate by bolts, the driving mechanism includes a bearing seat, and a stepper motor is fixed on the bearing seat, the output end of the stepper motor is fixedly connected to a gear, and a gear ring is meshed outside the gear, the spraying mechanism includes a liquid pipe, and a plurality of nozzles are equidistantly arranged around the outer circumference of the liquid pipe, and the liquid pipe The tube is connected in the bearing seat, and the gear ring is fixed to the outer wall of the liquid pipe, one end of the liquid pipe is tightly connected to a hose through a rotating connecting seat, and the hose is connected to a liquid storage tank, one end of the hose extends into the liquid storage tank and is connected to a water pump, the outer wall of one of the side support plates is covered with a first support plate, and the top inner wall of the first support plate is provided with a first clamping hole, a first limiting plug rod is movably clamped in the first clamping hole, and the top of the first limiting plug rod is fixedly connected to a first L-shaped connecting frame, and the first L-shaped connecting frame is connected to the first limiting plug frame The first support plate is connected to the side support plate, the bottom end of the first support plate is fixedly connected to a fixing seat, and the bearing seat is placed on the fixing seat, the side limiting mechanism includes a second support plate, and the top inner wall of the second support plate is provided with a second clamping hole, a second limiting bracket is movably clamped in the second clamping hole, and a second L-shaped connecting frame is fixedly connected to the top of the second limiting bracket, the second L-shaped connecting frame is connected to the other side support plate through the second limiting bracket, the inner wall of the second support plate is fixedly connected to a limiting sleeve, and one end of the liquid passing tube extends into the limiting sleeve.

[0018] By providing a side limiting mechanism, a driving mechanism and a spraying mechanism, generally before using the twist king-shaped mold for concrete pouring, it is necessary to open the twist king-shaped mold and apply a release agent on its inner wall with a brush. Since the twist king-shaped mold is generally large in size, the coating work is relatively cumbersome. The present invention is installed on the side support plate for limiting by the side limiting mechanism and the driving mechanism. The limiting sleeve in the side limiting mechanism provides support for one end of the liquid passing tube. The driving mechanism drives the liquid passing tube to rotate in the twist king-shaped mold and draws out the release agent from the liquid storage tank and sprays it on the inner wall of the twist king-shaped mold. The twist king-shaped mold is tilted by pulling one side of the twist king-shaped mold through the crane arm, so that excess release agent is discharged from the leakage hole, and the automatic coating of the release agent can be completed. Under this structure, while ensuring the uniformity of coating, it also reduces the difficulty of manual operation, effectively improving the coating efficiency.

[0019] In a preferred embodiment, the defoaming mechanism is connected to the outside of one of the side support plates through a driving mechanism, the defoaming mechanism includes a buffer sleeve, the gear ring in the driving mechanism is fixed to the buffer sleeve, and the buffer sleeve is connected to the bearing seat, one end of the buffer sleeve is connected to a vibration rod, one end of the buffer sleeve is fixedly connected to a vibrator, and the output end of the vibrator passes through the buffer sleeve and is connected to the vibration rod, an extension frame is fixedly connected to an outer wall of one side of the bearing seat, and the vibrator is fixed on the extension frame, the end of the vibration rod is fixedly connected to a vibration bent rod, and a plurality of extended vibration blades are equidistantly distributed on the vibration bent rod.

[0020] By providing a defoaming mechanism, which is also fixed to the outside of the side support plate through a driving mechanism, starting the vibrator can drive the vibration rod and the vibration bent rod to vibrate, and at the same time, the transmission area of ​​the vibration bent rod can be expanded by rotating the vibration bent rod with the vibration rod as the axis, thereby achieving the effect of defoaming inside the concrete. In addition, under the action of the extended vibrating blade, while the transmission area is synchronously expanded, based on its thin sheet shape, when the vibration bent rod rotates, it can play a role in breaking the concrete, thereby reducing the resistance of the concrete to the vibration bent rod.

[0021] As can be seen from the above, the method and device for making prefabricated concrete blocks with sea sand provided by the present invention purifies the sea sand and then adds the sea sand particles to the concrete mixture, so that the chloride ions contained in the sea sand are reduced, and it is less likely to affect the strength and durability of the concrete mixture, so that the strength and durability of the concrete using sea sand as aggregate are better; by simultaneously acting on fly ash and slag, the sea sand concrete has a stronger resistance to chloride ion penetration in the later stage, the sea sand will improve the concrete's impermeability and carbonization resistance, the addition of fiber can improve the concrete's crack resistance and frost resistance to a limited extent, and silica fume can improve the frost resistance of seamount concrete to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention provides a flow chart of a method for making prefabricated concrete blocks using sea sand.

[0023] Figure 2 The present invention provides a schematic diagram of the overall structure of a device for making prefabricated concrete blocks using sea sand.

[0024] Figure 3 The present invention provides a schematic diagram of the disassembled structure of the side limiting mechanism of the device for making prefabricated concrete blocks using sea sand.

[0025] Figure 4 This is a schematic diagram of the disassembled structure of the driving mechanism and the spraying mechanism of the device for making prefabricated concrete blocks with sea sand proposed by the present invention.

[0026] Figure 5This is a schematic diagram of the disassembled structure of the defoaming mechanism of the device for making precast concrete blocks with sea sand proposed by the present invention.

[0027] In the figure: 1, cover plate; 2, twisting king-shaped mold; 3, crane arm; 4, spraying mechanism; 5, driving mechanism; 6, leakage hole; 7, first sealing plate; 8, side limit mechanism; 9, side support plate; 10, side sealing plate; 11, observation port; 12, rack; 13, edge sealing; 401, liquid pipe; 402, nozzle; 403, rotating connection seat; 404, hose; 405, liquid storage tank; 501, gear ring; 502, bearing seat; 503, stepping motor; 504, gear; 505, first support plate; 506, first snap-in hole; 507, first limit rod; 508, first L-shaped connecting frame; 509, first limit rack; 510, fixing seat; 1401, extended vibrating blade; 1402, vibrating bending rod; 1403, vibrating rod; 1404, buffer sleeve; 1405, vibrator; 1406, extension frame; 801, second L-shaped connecting frame; 802, second limit rod; 803, second limit rack; 804, second snap-in hole; 805, second support plate; 806, limit sleeve. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Reference Figure 1 A method for making prefabricated concrete blocks using sea sand, comprising the following steps:

[0030] Step 1: Raw material preparation: Use 300 parts of sea sand as fine aggregate, and select appropriate 200 parts of coarse aggregate, 800 parts of crushed stone, 150 parts of admixture, 130 parts of water, 400 parts of cement, 15 parts of water reducer and 10 parts of steel bar rust inhibitor additive, wherein the admixture includes fly ash and slag mixture, plant fiber and silica fume, and the coarse aggregate is river sand;

[0031] Step 2: Purification of sea sand: Sea sand should be purified before use, and the salt and impurities in it should be removed by washing with fresh water to ensure the performance of concrete;

[0032] Step 3: Mix design: Determine the optimal mix ratio of concrete, with a water-cement ratio of 0.44-0.47 to ensure the strength and durability of the concrete;

[0033] Step 4: Concrete mixing: Use a twin-shaft forced mixer to mix to ensure the uniformity of the concrete. The mixing time is controlled within 60-90 seconds to ensure the slump and workability of the concrete.

[0034] Step 5: pouring and molding: pouring the mixed concrete into the twisted king-shaped mold (2), vibrating or compacting it to remove air bubbles using a defoaming mechanism to form the desired prefabricated block shape;

[0035] Step 6: Curing and quality inspection: After pouring, the precast concrete blocks are cured to promote hardening and quality inspection is carried out in accordance with relevant standards, including tests on durability, carbonation resistance and frost resistance;

[0036] Step 7: Anti-rust treatment: Take anti-rust measures for steel bars that need to be exposed.

[0037] Reference Figure 2 and Figure 4 A device for making prefabricated concrete blocks with sea sand includes a twisted king-shaped mold 2, the outer walls of the two ends of the twisted king-shaped mold 2 are respectively fixedly connected with side support plates 9, and the side support plates 9 are penetrated with an observation port 11, the outer walls of the side support plates 9 are connected with side sealing plates 10 through hinges, and the side sealing plates 10 cover the outer walls of the observation ports 11 and are connected to the side support plates 9 through bolts, the side support plates 9 at both ends can be connected to side limiting mechanisms 8 and driving mechanisms 5 respectively, and one of the side support plates 9 can be connected to a spraying mechanism 4 and a defoaming mechanism respectively through the driving mechanism 5.

[0038] Reference Figure 4 In a preferred embodiment, a sealing edge 13 is provided on the outer periphery of the twisting king-shaped mold 2, a hanger 12 is movably inserted through the screw hole on the sealing edge 13, and the hanger 12 can be connected to the crane arm 3, the top of the twisting king-shaped mold 2 is covered with a covering plate 1, and a leakage hole 6 is penetrated at one end of the twisting king-shaped mold 2, and the leakage hole 6 is covered with a first sealing plate 7 fixed by bolts.

[0039] Reference Figure 4 In a preferred embodiment, the driving mechanism 5 includes a bearing seat 502, and a stepper motor 503 is fixed on the bearing seat 502, and an output end of the stepper motor 503 is fixedly connected to a gear 504, and a gear ring 501 is meshed externally with the gear 504.

[0040] Reference Figure 4 In a preferred embodiment, the spraying mechanism 4 includes a liquid pipe 401, and a plurality of nozzles 402 are equidistantly arranged around the outer circumference of the liquid pipe 401, the liquid pipe 401 is connected to the bearing seat 502, and the gear ring 501 is fixed to the outer wall of the liquid pipe 401, one end of the liquid pipe 401 is tightly connected to a hose 404 through a rotating connecting seat 403, and the hose 404 is connected to a liquid storage tank 405, and one end of the hose 404 extends into the liquid storage tank 405 and is connected to a water pump.

[0041] Reference Figure 4In a preferred embodiment, the outer wall of one of the side support plates 9 is covered with a first support plate 505, and the top inner wall of the first support plate 505 is provided with a first clamping hole 506, a first limiting plug rod 507 is movably clamped in the first clamping hole 506, and the top of the first limiting plug rod 507 is fixedly connected with a first L-shaped connecting frame 508, the first L-shaped connecting frame 508 is connected to the side support plate 9 through the first limiting plug rack 509, the bottom end of the first support plate 505 is fixedly connected with a fixing seat 510, and the bearing seat 502 is placed on the fixing seat 510.

[0042] Reference Figure 3 In a preferred embodiment, the side limiting mechanism 8 includes a second support plate 805, and the top inner wall of the second support plate 805 is provided with a second clamping hole 804, and the second clamping hole 804 is movably clamped with a second limiting bracket 802, and the top of the second limiting bracket 802 is fixedly connected with a second L-shaped connecting frame 801, and the second L-shaped connecting frame 801 is connected to the other side support plate 9 through the second limiting bracket 803, and the inner wall of the second support plate 805 is fixedly connected with a limiting sleeve 806, and one end of the liquid pipe 401 extends into the limiting sleeve 806. Generally, before using the twist king-shaped mold 2 for concrete pouring, it is necessary to open the twist king-shaped mold 2 and apply a release agent on its inner wall with a brush. Since the twist king-shaped mold 2 is generally large in size, the coating work is relatively cumbersome. The present invention is installed on the side support plate 9 through the side limiting mechanism 8 and the driving mechanism 5 for limiting. , both of which are spanned over the top of the side support plate 9 through an L-shaped connecting frame, and are inserted into the holes of the side support plate 9 and the first support plate 505 at the same time through the limiting plug-in frame to achieve quick installation. The installation structure is simple to operate and has a stable connection, which can avoid structural displacement. The limiting sleeve 806 in the side limiting mechanism 8 provides support for one end of the liquid passing tube 401, and in the driving mechanism 5, the stepping motor 503 drives the gear ring 510 to rotate through the gear 504 to make the liquid passing tube 401 rotate in the twisting king-shaped mold 2 and extract the release agent from the liquid storage tank 405 to spray on the inner wall of the twisting king-shaped mold 2. The crane arm 3 pulls one side of the twisting king-shaped mold 2 to drive it to tilt, so that the excess release agent is discharged from the leakage hole 6, and the automatic coating of the release agent can be completed. Under this structure, while ensuring the uniformity of coating, it also reduces the difficulty of manual operation and effectively improves the coating efficiency.

[0043] Reference Figure 5 In a preferred embodiment, the defoaming mechanism is connected to the outside of one of the side support plates 9 through a driving mechanism 5, and the defoaming mechanism includes a buffer sleeve 1404. The gear ring 501 in the driving mechanism 5 is fixed to the buffer sleeve 1404, and the buffer sleeve 1404 is connected to the bearing seat 502. One end of the buffer sleeve 1404 is connected to a vibration rod 1403.

[0044] Reference Figure 5In a preferred embodiment, one end of the buffer sleeve 1404 is fixedly connected to a vibrator 1405, and the output end of the vibrator 1405 passes through the buffer sleeve 1404 and is connected to the vibration rod 1403. An extension frame 1406 is fixedly connected to the outer wall of one side of the bearing seat 502, and the vibrator 1405 is fixed on the extension frame 1406. The end of the vibration rod 1403 is fixedly connected to a vibration bent rod 1402, and a plurality of extended vibration blades 1401 are evenly distributed on the vibration bent rod 1402. The defoaming mechanism is also fixed to the outside of the side support plate 9 through the driving mechanism 5, and is also detachable, and can be inserted into the vibration bent rod 140 through the observation port 11. 2 and the vibration rod 1403 are made to penetrate into the concrete, and the vibrator 1405 can be started to drive the vibration bent rod 1402 to vibrate in the concrete through the transmission of the vibration rod 1403. At the same time, the driving mechanism 5 drives the vibration bent rod 1402 to rotate with the vibration rod 1403 as the axis, which can expand the transmission area of ​​the vibration bent rod 1402, thereby achieving the effect of defoaming inside the concrete. In addition, under the action of the extended vibration blade 1401, while the transmission area is synchronously expanded, based on its thin sheet shape, when the vibration bent rod 1402 rotates, it can play a role in breaking the concrete, thereby reducing the resistance of the concrete to the vibration bent rod 1402.

[0045] Working principle: Before using the twisted king-shaped mold 2 for concrete pouring, it is necessary to open the twisted king-shaped mold 2 and apply a release agent on its inner wall with a brush. Since the twisted king-shaped mold 2 is generally large in size, the coating work is relatively cumbersome. The present invention is installed on the side support plate 9 for limiting by means of a side limit mechanism 8 and a drive mechanism 5, both of which are spanned over the top of the side support plate 9 through an L-shaped connecting frame, and are simultaneously inserted into the holes of the side support plate 9 and the first support plate 505 through a limit plug-in frame to achieve rapid installation. The installation structure is simple to operate and has a stable connection, which can avoid structural displacement. The side limit mechanism The limiting sleeve 806 in the structure 8 provides support for one end of the liquid passing tube 401, and in the driving mechanism 5, the stepping motor 503 drives the gear ring 510 to rotate through the gear 504, so that the liquid passing tube 401 rotates in the twisting king-shaped mold 2 and the release agent is drawn out from the liquid storage tank 405 and sprayed on the inner wall of the twisting king-shaped mold 2. The crane arm 3 pulls one side of the twisting king-shaped mold 2 to drive it to tilt, so that the excess release agent is discharged from the leakage hole 6, and the automatic coating of the release agent can be completed. Under this structure, while ensuring the uniformity of coating, it also reduces the difficulty of manual operation and effectively improves the coating efficiency.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for making prefabricated concrete blocks using sea sand, characterized in that: The specific steps include: Step 1: Raw material preparation: Use 300 parts of sea sand as fine aggregate, and select appropriate 200 parts of coarse aggregate, 800 parts of crushed stone, 150 parts of admixture, 130 parts of water, 400 parts of cement, 15 parts of water reducer and 10 parts of steel bar rust inhibitor additive, wherein the admixture includes fly ash and slag mixture, plant fiber and silica fume, and the coarse aggregate is river sand; Step 2: Purification of sea sand: Sea sand should be purified before use, and the salt and impurities in it should be removed by washing with fresh water to ensure the performance of concrete; Step 3: Mix design: Determine the optimal mix ratio of concrete, with a water-cement ratio of 0.44-0.47 to ensure the strength and durability of the concrete; Step 4: Concrete mixing: Use a twin-shaft forced mixer to mix to ensure the uniformity of the concrete. The mixing time is controlled within 60-90 seconds to ensure the slump and workability of the concrete. Step 5: pouring and molding: pouring the mixed concrete into the twisted king-shaped mold (2), vibrating or compacting it to remove air bubbles using a defoaming mechanism to form the desired prefabricated block shape; Step 6: Curing and quality inspection: After pouring, the precast concrete blocks are cured to promote hardening and quality inspection is carried out in accordance with relevant standards, including tests on durability, carbonation resistance and frost resistance; Step 7: Anti-rust treatment: Take anti-rust measures for steel bars that need to be exposed.

2. A device for making prefabricated concrete blocks from sea sand, applied to the method for making prefabricated concrete blocks from sea sand as claimed in claim 1, characterized in that: The outer walls at both ends of the twisted W-shaped mold (2) are respectively fixedly connected with side support plates (9), and the side support plates (9) are penetrated by an observation port (11). The outer walls of the side support plates (9) are connected with side sealing plates (10) through hinges, and the side sealing plates (10) cover the outer walls of the observation port (11) and are connected to the side support plates (9) through bolts. The side support plates (9) at both ends can be connected to the side limit mechanisms (8) and the driving mechanisms (5) respectively, and one of the side support plates (9) is connected to the spraying mechanism (4) and the defoaming mechanism through the driving mechanism (5).

3. The device for making prefabricated concrete blocks from sea sand according to claim 2, characterized in that: The outer periphery of the twisting W-shaped mold (2) is provided with an edge seal (13), a screw hole on the edge seal (13) is movably penetrated with a hanger (12), and can be connected to a crane arm (3) through the hanger (12), the top of the twisting W-shaped mold (2) is covered with a cover plate (1), and a leakage hole (6) is penetrated at one end of the twisting W-shaped mold (2), and the leakage hole (6) is covered with a first sealing plate (7) fixed by bolts.

4. The device for making prefabricated concrete blocks from sea sand according to claim 2, characterized in that: The driving mechanism (5) comprises a bearing seat (502), and a stepper motor (503) is fixed on the bearing seat (502). The output end of the stepper motor (503) is fixedly connected to a gear (504), and the gear (504) is externally meshed with a gear ring (501).

5. The device for making prefabricated concrete blocks from sea sand according to claim 4, characterized in that: The spraying mechanism (4) comprises a liquid passing pipe (401), and a plurality of spray heads (402) are arranged equidistantly around the outer circumference of the liquid passing pipe (401); the liquid passing pipe (401) is connected to the inside of a bearing seat (502), and a gear ring (501) is fixed to the outer wall of the liquid passing pipe (401); one end of the liquid passing pipe (401) is tightly connected to a hose (404) via a rotating connecting seat (403), and the hose (404) is connected to a liquid storage tank (405); one end of the hose (404) extends into the liquid storage tank (405) and is connected to a water pump.

6. The device for making prefabricated concrete blocks from sea sand according to claim 5, characterized in that: The outer wall of one of the side support plates (9) is covered with a first support plate (505), and the inner wall at the top end of the first support plate (505) is provided with a first clamping hole (506), a first limiting plug rod (507) is movably clamped in the first clamping hole (506), and the top end of the first limiting plug rod (507) is fixedly connected with a first L-shaped connecting frame (508), the first L-shaped connecting frame (508) is connected to the side support plate (9) through a first limiting plug rod (509), the bottom end of the first support plate (505) is fixedly connected with a fixing seat (510), and the bearing seat (502) is placed on the fixing seat (510).

7. The device for making prefabricated concrete blocks from sea sand according to claim 5, characterized in that: The side limiting mechanism (8) comprises a second support plate (805), and a second clamping hole (804) is provided on the inner wall at the top end of the second support plate (805), a second limiting bracket (802) is movably clamped in the second clamping hole (804), and a second L-shaped connecting frame (801) is fixedly connected to the top end of the second limiting bracket (802), the second L-shaped connecting frame (801) is connected to the other side support plate (9) through the second limiting bracket (803), the inner wall of the second support plate (805) is fixedly connected to the limiting sleeve (806), and one end of the liquid passage tube (401) extends into the limiting sleeve (806).

8. The device for making prefabricated concrete blocks from sea sand according to claim 6, characterized in that: The defoaming mechanism is connected to the outside of one of the side support plates (9) via a driving mechanism (5), the defoaming mechanism comprises a buffer sleeve (1404), a gear ring (501) in the driving mechanism (5) is fixed to the buffer sleeve (1404), and the buffer sleeve (1404) is connected to the inside of a bearing seat (502), and one end of the buffer sleeve (1404) is connected to a vibration rod (1403).

9. The device for making prefabricated concrete blocks from sea sand according to claim 8, characterized in that: One end of the buffer sleeve (1404) is fixedly connected to a vibrator (1405), and the output end of the vibrator (1405) passes through the buffer sleeve (1404) and is connected to the vibration rod (1403); an extension frame (1406) is fixedly connected to an outer wall of one side of the bearing seat (502), and the vibrator (1405) is fixed on the extension frame (1406); the end of the vibration rod (1403) is fixedly connected to a vibration bent rod (1402), and a plurality of extended vibration blades (1401) are evenly distributed on the vibration bent rod (1402).

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