CN217491157U

CN217491157U - Reclaimed sand production equipment

Info

Publication number: CN217491157U
Application number: CN202221447868.2U
Authority: CN
Inventors: 贾洪祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-09-27
Anticipated expiration: 2032-06-10

Abstract

The utility model discloses reclaimed sand production equipment, which comprises a hopper, an extrusion crushing unit, a hammering unit, a screening unit, a grinding unit and a dewatering screen which are arranged in sequence, wherein a discharge port below the hopper is provided with a vibrating plate, and the vibrating plate is used for feeding materials into the extrusion crushing unit for primary crushing; the hammering unit is used for further crushing the primarily crushed material; the screening unit comprises at least one layer of separating screen, and is used for screening stones, sand grains and cement powder in the crushed materials; the grinding unit is used for further separating cement on the surface of sand grains; the dewatering screen is used for separating cement powder mixed among sand grains; and driving belts are arranged between the hammering unit and the screening unit, between the screening unit and the grinding unit, and between the grinding unit and the dewatering screen. This reclaimed sand production facility helps the recovery and reuse of construction waste, has the beneficial effect that is favorable to environmental protection.

Description

Reclaimed sand production equipment

Technical Field

The utility model relates to a system sand equipment technical field, concretely relates to reclaimed sand production facility.

Background

Sands are generally classified into natural sands and artificial sands. Rock particles having a particle size of 5mm or less, which are formed by the action of natural conditions (mainly weathering of rocks), are called natural sand. Natural sand can be classified into sea sand, river sand and mountain sand according to its source. The sand has rough surface, multi-edge angle, high sand content, high organic impurity content and poor quality. The sea sand and river sand have smooth surfaces, but the sea sand has high salt content, has certain influence on concrete and mortar, and is relatively clean and widely applied. Along with the increasing use, natural resources are less and less, so artificial sand making is urgently needed at present.

SUMMERY OF THE UTILITY MODEL

For overcoming the above-mentioned not enough among the prior art, the utility model provides a reclaimed sand production facility that helps recycling of construction waste and be favorable to environmental protection.

The technical scheme of the utility model is that:

a reclaimed sand production device comprises a hopper, an extrusion crushing unit, a hammering unit, a screening unit, a grinding unit and a dewatering screen which are sequentially arranged, wherein a discharge port is arranged below the hopper, a vibration plate is arranged at the discharge port, and the vibration plate is used for feeding materials into the extrusion crushing unit; the extrusion crushing unit is used for crushing the material for the first time; the hammering unit is used for further crushing the primarily crushed material; the screening unit comprises at least one layer of separating screen, and is used for screening stones, sand grains and cement powder in the crushed materials; the grinding unit is used for further separating cement on the surface of sand grains; the dewatering screen is used for separating cement powder mixed among sand grains;

and driving belts are arranged between the hammering unit and the screening unit, between the screening unit and the grinding unit and between the grinding unit and the dewatering screen.

Preferably, the vibration plate comprises a vibration plate body, a first spring and a first vibration device, and the vibration plate body is connected with the hopper or the bracket through the first spring;

the extrusion crushing unit comprises a first rack, a static jaw, a movable jaw, a first driving motor, a connecting rod, a first push rod and two thrust rods, wherein the static jaw is fixedly connected with the first rack, one end of the movable jaw is hinged with the first rack, an eccentric shaft is rotatably connected at the first rack, one end of the connecting rod is connected with the eccentric shaft, one end of the first push rod is hinged with one end of the movable jaw, the other end of the first push rod is hinged with the end part of the connecting rod, one end of the second push rod is hinged with the first rack, and the other end of the second push rod is hinged with the end part of the connecting rod;

the hammering unit comprises a second rack, a hammering shaft, hammers, a crushing plate, a grate and a second driving motor, the hammering shaft is rotatably connected with the second rack, the hammers are uniformly distributed on the peripheral surface of the hammering shaft, the crushing plate and the grate are connected with the second rack, and the second driving motor is used for providing power for the hammering shaft;

the screening unit comprises a third rack and a plurality of separating screens, each separating screen is connected with the third rack through a second spring, and a second vibrating device is arranged at each separating screen;

the grinding unit comprises a fourth rack, a cylinder and a third driving motor, wherein through shafts are arranged at two ends of the cylinder, the cylinder is rotatably connected with the fourth rack through the through shafts, a plurality of steel balls are arranged in the cylinder, driven gears are arranged on the peripheral surface of the cylinder, and a driving gear matched with the driven gears is arranged on a rotating shaft of the third driving motor;

the dewatering screen comprises a fifth rack and a dewatering screen, the dewatering screen is connected with the fifth rack through a third spring, and a third vibrating device is arranged at the position of the dewatering screen.

In any of the above schemes, preferably, the screening unit and the dewatering screen are provided with a leaching device, and the leaching device is used for washing out dust particles in the process link.

In any of the above schemes, preferably, each of the transmission belts is provided with an iron removal device, the iron removal device includes a sixth frame and a magnetic belt, two ends of the sixth frame are provided with rotating shafts, the magnetic belt is rotatably connected with the rotating shafts, and the sixth frame is provided with a scraper for scraping off attachments on the surface of the magnetic belt.

In any of the above schemes, preferably, the first driving motor, the second driving motor, and the third driving motor are variable frequency motors.

In any of the above solutions, preferably, the surface of the side of the static jaw and the movable jaw, which contacts with the material, is movably connected with a lining plate.

In any of the above aspects, preferably, the surface of the lining plate is provided with a plurality of protrusions.

In any one of the above schemes, preferably, the reclaimed sand production facility further comprises a buffer bin, and the buffer bin is arranged between the screening unit and the grinding unit.

In any of the above schemes, preferably, the reclaimed sand production equipment further comprises a grit chamber, wherein collecting tanks are arranged below the screening unit and the dewatering screen, and the collecting tanks are communicated with the grit chamber.

In any one of the above schemes, preferably, the reclaimed sand production facility further includes a control unit, the first drive motor, the second drive motor, the third drive motor, the first vibration device, the second vibration device and the third vibration device are all connected in parallel with the power supply through relays respectively, the control unit is electrically connected with the relays in a wired or wireless manner, and the control unit is used for controlling the on/off of the relays.

The utility model discloses a regeneration sand production facility through retrieving the dumped construction waste of building site, through flows such as feed, extrusion breakage, hammer brokenly, screening, grinding, washed-out sand, finally obtains the finished product sand. The reclaimed sand production equipment is beneficial to recycling of construction waste and has the beneficial effect of being beneficial to environmental protection.

Drawings

Fig. 1 is a process flow diagram of the reclaimed sand production equipment of the utility model.

Fig. 2 is a schematic view of an embodiment of the hopper of the reclaimed sand production apparatus of the present invention.

Fig. 3 is a schematic view of an embodiment of the vibration plate of the reclaimed sand production apparatus of the present invention.

Fig. 4 is a schematic cross-sectional view of an embodiment of the crushing unit of the reclaimed sand production apparatus according to the present invention.

Fig. 5 is a schematic cross-sectional view of an embodiment of the hammering unit of the reclaimed sand production apparatus of the present invention.

Fig. 6 is a schematic diagram of an embodiment of the sieving unit of the reclaimed sand production facility according to the present invention.

Fig. 7 is a schematic diagram of an embodiment of the grinding unit of the reclaimed sand production apparatus according to the present invention.

Fig. 8 is a schematic view of an embodiment of a dewatering screen of the reclaimed sand production apparatus of the present invention.

Fig. 9 is a schematic view of an embodiment of the driving belt and the iron removing device of the reclaimed sand production equipment of the present invention.

The reference numbers in the figures illustrate:

101-a hopper; 201-vibration plate body; 202-a first spring; 301-static jaw; 302-a liner plate; 303-an eccentric shaft; 304-a first rack; 305-a first drive motor; 306-a second push rod; 307-connecting rod; 308-a first push rod; 309-moving jaw; 401-hammer breaking the shaft; 402-a hammer head; 403-a breaker plate; 404-a second rack; 405-grate bars; 501-a third rack; 502-separation screen; 503-a second spring; 601-a fourth gantry; 602-a through mandrel; 603-cylinder body; 604-a third drive motor; 605-driven gear; 606-a drive gear; 701-a dewatering screen; 702-a fifth gantry; 703-a third spring; 801-transmission belt; 802-magnetic band; 803-sixth gantry; 804-Screed.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientation or positional relationship is based on that shown in the drawings, and is only for convenience of description and simplicity of description, and does not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1:

a reclaimed sand production device is shown in figure 1-2 and comprises a hopper 101, an extrusion crushing unit, a hammering unit, a grinding unit and a dewatering screen which are sequentially arranged, wherein a discharge hole is formed below the hopper 101, a vibration plate is arranged at the discharge hole and used for feeding materials into the extrusion crushing unit; the extrusion crushing unit is used for crushing the material for the first time; the hammering unit is used for further crushing the primarily crushed material; the screening unit comprises at least one layer of screen, and is used for screening stones, sand grains and cement powder in the crushed materials; the grinding unit is used for further separating cement on the surface of sand grains; the dewatering screen is used for separating cement powder mixed among sand grains; and transmission belts 801 are arranged between the hammering unit and the screening unit, between the screening unit and the grinding unit, and between the grinding unit and the dewatering screen.

In this embodiment, the raw material of the reclaimed sand production facility is construction waste (concrete block), and the construction concrete includes: cement, sand, stone, water and additives, and the components are solidified to form a hard building material. The concrete is solidified essentially because cement and water are subjected to chemical reaction, the hydration product of the concrete has gelling property, the reacted cement is coated on the surfaces of sand and stone, and the strength of the solidified concrete is improved due to the irregular shapes of the sand and the stone. It can be understood that the strength of the cement after hydration is weaker than that of the sand and the stone, and the hydration product of the cement after the concrete is solidified is connected with the outer surfaces of the sand and the stone in a physical mode, so that the small concrete fragments are easy to separate the sand and the stone from the cement after hydration under the actions of extrusion and beating. The utility model discloses it makes sand, stone obtain the separation from the construction waste based on this principle.

Hopper 101 is used for holding construction waste. Specifically, when the construction waste collecting device is used, construction waste can be conveyed into the hopper 101 through equipment such as a forklift, a discharge hole is formed in the bottom of the hopper 101, and the construction waste in the hopper 101 falls into the vibrating plate through the discharge hole.

The vibration plate receives construction waste falling from the hopper 101, and feeds the waste into the crushing unit at a certain speed. As shown in fig. 3, the diaphragm includes a diaphragm body 201, a first spring 202 and a first vibration device, and a protective edge is disposed at an upper edge of the diaphragm body 201. The vibrating plate can be arranged below the hopper 101 in an independent unit, namely, the vibrating plate body 201 is arranged on the support through the first spring 202, the first vibrating device is arranged at the position of the vibrating plate body 201, and under the action of the first vibrating device, concrete waste at the position of the vibrating plate body 201 is sent into the extrusion crushing unit. The vibration plate body 201 can also be directly connected with the hopper 101 through the first spring 202, and under the action of the first vibration device, the concrete waste at the vibration plate body 201 can be fed into the extrusion crushing unit.

The crushing unit is used for crushing the concrete waste for the first time, the crushing unit can adopt a jaw crusher, as shown in fig. 4, the crushing unit comprises a first frame 304, a static jaw 301, a movable jaw 309, a first driving motor 305, a connecting rod 307, a first push rod 308 and a second push rod 306, and the first frame 304 is used for installing each component of the crushing unit. Specifically, the stationary jaw 301 is fixedly connected to the first frame 304, and one end of the movable jaw 309 is hinged to the first frame 304. The eccentric shaft 303 is rotatably connected to a first frame 304, and the first driving motor 305 is used for providing power for the eccentric shaft 303. One end of the connecting rod 307 is rotatably connected with the eccentric shaft 303, the other end of the connecting rod 307 is provided with a support, the end parts of one ends of the first push rod 308 and the second push rod 306 are hinged with the end part of the other end of the connecting rod 307 through the support, and the end parts of the other ends of the first push rod 308 and the second push rod 306 are respectively hinged with the other end of the movable jaw 309 and the first frame 304. Driven by the eccentric shaft 303, the mechanism consisting of the connecting rod 307, the first push rod 308, the second push rod 306 and the first frame 304 drives the movable jaw 309 to swing along the hinge point of the movable jaw 309 and the frame 304. The movable jaw 309 cooperates with the stationary jaw 301 to complete the primary breaking of the concrete waste.

After the concrete waste is crushed for the first time, the large concrete waste is crushed into small blocks, and materials are provided for the next hammering procedure.

The hammering unit is used for further crushing the small concrete blocks in the previous process. Specifically, as shown in fig. 5, the hammering unit includes a second frame 404, a hammering shaft 401, a hammer head 402, a crushing plate 403, a grate bar 405, and a second driving motor, wherein the hammering shaft 401 is rotatably connected to the second frame 404, and the second driving motor is used for providing power for the hammering shaft 401. The hammers 402 are a plurality of hammers 402, each hammer 402 is uniformly distributed on the circumferential surface of the hammer breaking shaft 401, and when materials enter the hammer breaking unit, each hammer 402 drives the materials to do high-speed circular motion in the second rack 404, the materials are thrown out under the action of centrifugal force and impact on the crushing plate 403, and at the moment, the concrete blocks are further crushed. The grate bars 405 are used for leaking out materials with qualified sizes, wherein gaps of the grate bars 405 can be selected to be matched with the particle size of stones in the concrete. The stripping of stones and concrete in the concrete can be realized through the procedure, and meanwhile, the concrete fragments without stones are beaten into fragments with the diameter of 0.2-0.5 CM.

The material in the previous process is fed to the sieving unit through a conveyor belt 801. As shown in fig. 6, the screening unit includes a third frame 501, a plurality of separating screens 502, each separating screen 502 is connected to the third frame 501 through a second spring 503, and a second vibrating device is disposed at the separating screen 502; each of the separation screens 502 is distributed at the third frame 501 from top to bottom. The upper layer of separating screen 502 can be selected to have 2cm aperture for separating stones from concrete fragments. The lower separation screen 502 may have a 0.2cm aperture for separating concrete fragments and fine cement dust from the previous process. The cement dust can escape from the lower separating screen 502 and the non-stone-containing concrete fragments separated by the lower separating screen 502 are fed to the grinding unit via the conveyor belt 801.

The concrete fragments without stones are further crushed by the grinding unit, so that sand grains are thoroughly separated from the cement. Specifically, as shown in fig. 7, the grinding unit includes a fourth frame 601, a cylinder 603, and a third driving motor 604, through shafts 602 are provided at two ends of the cylinder 603, the cylinder 603 is rotatably connected to the fourth frame 601 through the through shafts 602, a plurality of steel balls are provided in the cylinder 603, a driven gear 605 is provided at a circumferential surface of the cylinder 603, and a driving gear 606 adapted to the driven gear 605 is provided at a rotation shaft of the third driving motor 604. When the device is used, materials are guided into the barrel 603 through the through mandrel 602 on one side of the barrel 603, when the barrel 603 rotates, the inner wall of the barrel 603 drives the steel ball to move upwards, and when the steel ball moves to a certain height, the steel ball falls down and impacts fragments which do not contain concrete, so that cement adhered to the surface of sand grains is separated, and simultaneously, the cement is crushed into particles with the diameter smaller than 0.6 mm. After the separation is completed, the material is led out through the through-core shaft 602 on the other side of the cylinder 603. After the process is completed, the material is introduced into the dewatering screen.

As shown in fig. 8, the dewatering screen includes a fifth frame 702 and a dewatering screen 701, the dewatering screen 701 is connected to the fifth frame 702 through a third spring 703, and a third vibrating device is disposed at the dewatering screen 701. Wherein, the dewatering screen 701 can be selected from 1.2mm aperture.

In this embodiment, the screening unit and the dewatering screen are both provided with a leaching device, and the leaching device is used for washing out dust particles in the process link. The water can be sprayed down from the upper parts of the screening unit and the dewatering screen through the leaching device, and cement dust particles in the corresponding process links can be efficiently washed out through the leaching device. Making the separation more complete.

In this embodiment, as shown in fig. 9, each of the transmission belts 801 is provided with an iron removing device, the iron removing device includes a sixth frame 803 and a magnetic belt 802, two ends of the sixth frame 803 are provided with a rotating shaft, the magnetic belt 802 is rotatably connected to the rotating shaft, and one end of the sixth frame 803 is provided with a scraper 804 for scraping off attachments on the surface of the magnetic belt 802. The iron blocks mixed in the concrete can be removed through the iron removing device, and the quality of the finished sand is ensured. When in use, the magnetic belt 802 of the iron removing device is arranged above the transmission belt 801, and the distance between the magnetic belt 802 and the transmission belt 801 is preferably 20-30 cm. The iron blocks are attracted to the magnetic belt 802 by the attraction of the magnetic belt 802, and when the iron blocks travel to the scraper 804, the iron blocks are scraped by the scraper 804 and fall into the lower part for centralized processing.

In this embodiment, the first driving motor 305, the second driving motor, and the third driving motor 604 are variable frequency motors. The variable frequency motor can adjust power according to the conformity of the motor, and can reduce the production cost when in use. In which the inverter motor is used as the prior art and will not be described too much again.

In this embodiment, the lining plate 302 is movably connected to the surface of the static jaw 301 and the movable jaw 309 contacting with the material. The lining plate 302 can prevent the static jaw 301 and the movable jaw 309 from being damaged on the side contacting with the material. The lining plate 302 adopts the mode of swing joint, when the lining plate 302 takes place to damage, facilitates the change to the lining plate 302.

In order to increase the crushing efficiency of the movable jaw 309 and the fixed jaw 301 and prevent the material from bouncing up when the movable jaw 301 and the movable jaw 309 crush the material, a plurality of protrusions may be arranged on the surface of the lining plate 302.

In this embodiment, still include the buffer feed bin, the buffer feed bin sets up between screening unit and grinding unit. When the productivity of the grinding unit is insufficient, the materials generated by the screening unit can be temporarily stored to the buffer bin.

Example 2:

on the basis of embodiment 1, this embodiment adds the grit chamber, the screening unit, the below of dewatering screen all are provided with the collecting vat, each the collecting vat with the grit chamber converges. Specifically, the waste water mixed with dust generated at the screening unit and the dewatering screen can be collected to the grit chamber through a device such as a mortar pump or a self-flowing mode. And the dust in the grit chamber is settled to the bottom through natural settling, and the supernatant is drained to each leaching device, so that the water resource is recycled.

Example 3:

on the basis of embodiment 1 or embodiment 2, a control unit is added in this embodiment, the first driving motor 305, the second driving motor, the third driving motor 604, the first vibration device, the second vibration device, and the third vibration device are respectively connected in parallel with a power supply through relays, the control unit is electrically connected with the relays in a wired or wireless manner, and the control unit is used for controlling the on/off of the relays.

Specifically, the first driving motor 305, the second driving motor, the third driving motor 604, the first vibration device, the second vibration device, and the third vibration device are respectively connected in parallel to the power supply through a relay. And each relay is respectively connected with the I/O interface of the control unit. And the control unit controls the opening and closing of each motor or each vibration device by controlling the opening and closing of the corresponding relay. Through the control unit, the opening and closing of each driving motor and each vibration device can be realized through the central control room, so that the field operation of workers is avoided.

The above-mentioned embodiments are only specific embodiments of the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is within the technical scope of the present invention, and according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be covered in the protection scope of the present invention.

Claims

1. The reclaimed sand production equipment is characterized by comprising a hopper (101), an extrusion crushing unit, a hammering unit, a screening unit, a grinding unit and a dewatering screen which are sequentially arranged, wherein a discharge port is arranged below the hopper (101), and a vibration plate is arranged at the discharge port and used for feeding materials into the extrusion crushing unit; the extrusion crushing unit is used for crushing the material for the first time; the hammering unit is used for further crushing the primarily crushed material; the screening unit comprises at least one layer of separating screen (502), and is used for screening stones, sand grains and cement powder in the crushed materials; the grinding unit is used for further separating cement on the surface of sand grains; the dewatering screen is used for separating cement powder mixed among sand grains;

and transmission belts (801) are arranged between the hammering unit and the screening unit, between the screening unit and the grinding unit and between the grinding unit and the dewatering screen.

2. Reclaimed sand production equipment according to claim 1, wherein the vibration plate comprises a vibration plate body (201), a first spring (202) and a first vibration device, the vibration plate body (201) is connected with the hopper (101) or the bracket through the first spring (202);

the squeezing and crushing unit comprises a first rack (304), a static jaw (301), a movable jaw (309), a first driving motor (305), a connecting rod (307), a first push rod (308) and a second push rod (306), wherein the static jaw (301) is fixedly connected with the first rack (304), one end of the movable jaw (309) is hinged with the first rack (304), the first rack (304) is rotatably connected with an eccentric shaft (303), one end of the connecting rod (307) is connected with the eccentric shaft (303), one end of the first push rod (308) is hinged with one end of the movable jaw (309), the other end of the first push rod is hinged with the end of the connecting rod (307), one end of the second push rod (306) is hinged with the first rack (304), and the other end of the second push rod is hinged with the end of the connecting rod (307);

the hammering unit comprises a second rack (404), a hammering shaft (401), hammers (402), crushing plates (403), grate bars (405) and a second driving motor, the hammering shaft (401) is rotatably connected with the second rack (404), the hammers (402) are uniformly distributed on the peripheral surface of the hammering shaft (401), the crushing plates (403) and the grate bars (405) are connected with the second rack (404), and the second driving motor is used for providing power for the hammering shaft (401);

the screening unit comprises a third rack (501) and a plurality of separating screens (502), each separating screen (502) is connected with the third rack (501) through a second spring (503), and a second vibrating device is arranged at each separating screen (502);

the grinding unit comprises a fourth rack (601), a cylinder (603) and a third driving motor (604), through shafts (602) are arranged at two ends of the cylinder (603), the cylinder (603) is rotatably connected with the fourth rack (601) through the through shafts (602), a plurality of steel balls are arranged in the cylinder (603), driven gears (605) are arranged on the peripheral surface of the cylinder (603), and a driving gear (606) matched with the driven gears (605) is arranged on a rotating shaft of the third driving motor (604);

the dewatering screen comprises a fifth frame (702) and a dewatering screen (701), the dewatering screen (701) is connected with the fifth frame (702) through a third spring (703), and a third vibrating device is arranged at the position of the dewatering screen (701).

3. The reclaimed sand production apparatus according to claim 2, wherein a washing device is arranged at each of the sieving unit and the dewatering screen, and the washing device is used for washing out dust particles in the process.

4. The reclaimed sand production apparatus according to claim 2, wherein each conveyor belt (801) is provided with an iron removal device, the iron removal device comprises a sixth frame (803) and a magnetic belt (802), rotating shafts are arranged at two ends of the sixth frame (803), the magnetic belt (802) is rotatably connected with the rotating shafts, and a scraper (804) for scraping off surface attachments of the magnetic belt (802) is arranged at the sixth frame (803).

5. A reclaimed sand production apparatus according to claim 2 wherein the first drive motor (305), the second drive motor, and the third drive motor (604) are variable frequency motors.

6. A reclaimed sand production facility according to claim 2, wherein the surfaces of the material-contacting sides of the static jaw (301) and the movable jaw (309) are movably connected with the lining plate (302).

7. Reclaimed sand production equipment according to claim 6, wherein the surface of the liner plate (302) is provided with a plurality of protrusions.

8. The reclaimed sand production apparatus according to claim 1, further comprising a buffer bin provided between the sieving unit and the grinding unit.

9. The reclaimed sand production apparatus according to claim 1, further comprising a grit chamber, wherein collecting tanks are provided below the sieving unit and the dewatering screen, and each collecting tank communicates with the grit chamber.

10. The reclaimed sand production apparatus according to claim 2, further comprising a control unit, wherein the first drive motor (305), the second drive motor, the third drive motor (604), the first vibration device, the second vibration device and the third vibration device are respectively connected in parallel with a power supply through relays, the control unit is electrically connected with each relay in a wired or wireless manner, and the control unit is used for controlling the on/off of each relay.