Dedusting and spraying device for constructional engineering

Abstract

The invention relates to the technical field of dust removal spraying devices, and particularly discloses a dust removal spraying device for constructional engineering. A plurality of spraying holes are formed in the bottom of the spraying pipe; the adjusting mechanism is located on the inner wall of the spraying pipe; a water pump; the conveying mechanism is respectively connected with the water pump and the spraying pipe; according to the dust removal spraying device for the constructional engineering, water is conveyed to the spraying pipe through the arranged conveying mechanism, the conveying mechanism detects the water flow speed in real time and controls the adjusting mechanism to work when the water flow speed is increased, the adjusting mechanism increases the hole diameter of the spraying holes, and the spraying holes are evenly distributed in the spraying pipe; the diameter of the spraying holes is increased, so that water flow resistance in a pipeline is reduced, water flows out more smoothly, continuous pressure of fluid dynamic pressure on the pipeline is reduced, the impact damage risk of a water hammer on the pipeline and equipment is reduced, the pressure stabilizing mechanism absorbs pressure wave energy of the water hammer when spraying is stopped, and the influence on the structural stability of the tower arm is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal spraying devices, and particularly to a dust removal spraying device for construction projects. Background Technique

[0002] The dust removal spraying device for construction projects is a device used to reduce dust pollution during construction. Water is pressurized by a high-pressure water pump, and the water forms fine water mist particles through a special atomizing nozzle. These water mist particles have a large surface area and can fully contact with dust particles in the air. Through inertial collision, interception, aggregation and other effects, the dust particles adhere to the water mist particles, thereby increasing the weight of the dust particles and accelerating their sedimentation to achieve the purpose of dust removal. The types are divided into tower crane spraying systems, enclosure spraying systems and fog guns.

[0003] Among them, the tower crane spraying system generally installs equipment such as pipes and nozzles on the boom and tower body of the tower crane, and evenly sprays water to all corners of the construction area through the boom of the tower crane, which is suitable for dust removal in large construction sites.

[0004] However, in the tower crane spraying system, there is a direct positive correlation between the water pressure and the height of the tower arm. That is, when the height of the tower arm increases, the water pressure also increases. According to the principle of water hammer effect, when the valve is suddenly closed, the water flow velocity instantly becomes zero, and its kinetic energy is converted into pressure energy, generating water hammer pressure. The increase in the height of the tower arm increases the water pressure, and under the same valve closing action, the water hammer pressure will further increase.

[0005] The large water hammer pressure will be transmitted to the tower arm through the pipeline, generating an impact force on the tower arm. The tower arm is designed according to certain load and balance conditions, and the additional impact force may break the original balance state. Especially when the water hammer pressure acts repeatedly, it will cause fatigue stress in the tower arm structure. In the long run, it may lead to loosening and deformation of the connection parts of the tower arm, and even affect the stability of the entire tower arm, increasing the risk of tower arm tilt or imbalance. For this reason, we propose a dust removal spraying device for construction projects. Summary of the Invention

[0006] The purpose of the present invention is to provide a dust removal spraying device for construction projects to solve the problem that when the water hammer pressure acts repeatedly, it will cause fatigue stress in the tower arm structure, which may lead to loosening and deformation of the connection parts of the tower arm in the long run, and even affect the stability of the entire tower arm, increasing the risk of tower arm tilt or imbalance as mentioned in the above background technique.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A dust removal spraying device for construction projects, including a water storage tank; it also includes a spraying pipe, and a plurality of spraying holes are opened at the bottom of the spraying pipe; Adjusting mechanism, which is located on the inner wall of the spray pipe and adjusts the size of the spray holes according to the water pressure and the height of the tower arm; Water pump, which is connected to the water storage tank; Delivery mechanism, which is connected to the water pump and the spray pipe respectively. The delivery mechanism sends water to the spray pipe, detects the water flow velocity in real time, and controls the adjusting mechanism to work when the water flow velocity increases. The adjusting mechanism increases the size of the spray holes. Moreover, the delivery mechanism adaptively adjusts the water delivery height when the tower arm rises, and the delivery mechanism controls the adjusting mechanism to work when adjusting the water delivery height; Voltage stabilizing mechanism, which is connected to the spray pipe and absorbs the energy of the water hammer pressure wave when spraying stops.

[0008] Among them, the adjusting mechanism includes a baffle plate slidably connected to the inner wall of the spray pipe. The baffle plate blocks part of the spray holes. A connecting rod is fixedly connected to the outside of the baffle plate. A traction member is provided at one end of the connecting rod away from the baffle plate. A return spring is arranged outside the connecting rod. One end of the return spring is fixed to the baffle plate, and the other end of the return spring is fixed to the inner wall of the spray pipe.

[0009] Among them, the traction member includes an iron sheet fixedly connected to one end of the connecting rod away from the baffle plate. An electromagnet is installed on the inner wall of the spray pipe, and the electromagnet is located outside the iron sheet.

[0010] Among them, the delivery mechanism includes a water inlet pipe connected to the water pump. A support is provided on the outside of one end of the water inlet pipe away from the water pump. A fixed cylinder is fixedly connected to the inner wall of the support. The fixed cylinder is connected to the water inlet pipe. A rotating frame is rotatably connected to the inner wall of the support. A connecting pipe is fixedly connected to the inner wall of the rotating frame. The connecting pipe is L-shaped. One end of the connecting pipe is hermetically and rotatably connected to the inner wall of the fixed cylinder. A water delivery pipe is threadedly connected to the outside of the other end of the connecting pipe. The water delivery pipe is spirally wound around the outside of the rotating frame. One end of the water delivery pipe away from the connecting pipe is connected to the spray pipe. A flow velocity detection member for detecting the water flow velocity is provided on the inner wall of the fixed cylinder, and a tower height detection member for detecting the height of the tower arm is provided on the outside of the rotating frame.

[0011] Among them, the flow velocity detection member includes an impeller located on the inner wall of the fixed cylinder. The impeller is rotatably and hermetically connected to the inner wall of the fixed cylinder. One end of the impeller passes through the inner wall of the fixed cylinder and is fixedly connected to a rotating rod. A fixed disk is fixedly connected to the outside of the rotating rod. Swing arms are rotatably connected to both sides of the fixed disk. Centrifugal counterweight balls are fixedly connected to one ends of the swing arms away from the fixed disk. A moving disk is slidably connected to the outside of the rotating rod. Pulling rods are rotatably connected to both sides of the moving disk. One ends of the pulling rods away from the moving disk are rotatably connected to the swing arms. An adjusting member for adjusting the magnetic field size of the electromagnet according to the displacement amount of the moving disk is provided at the bottom of the moving disk.

[0012] Among them, the adjusting member includes a transmission cylinder fixedly connected to the bottom of the moving disk, a pulling rope fixedly connected to the outside of the transmission cylinder, a guide frame fixedly connected to the outside of the fixed cylinder, the pulling rope is slidably connected to the inner wall of the guide frame, one end of the pulling rope away from the transmission cylinder is fixedly connected with an insulating plate I, a placement box is fixedly connected to the outside of the fixed cylinder, the insulating plate I is slidably connected to the inner wall of the placement box, a compression spring is fixedly connected to the outside of the insulating plate I, the compression spring is fixed to the inner wall of the placement box, a sliding rheostat I is installed on the inner wall of the placement box, the insulating plate I is fixed to the sliding piece of the sliding rheostat I, and the sliding rheostat I is connected in series in the circuit where the electromagnet is located.

[0013] Among them, the tower height detection member includes a rotating shaft fixedly connected to the outside of the rotating frame, the rotating shaft is rotatably connected to the inner wall of the support, the rotating shaft is installed at the central part of the rotating frame, a transmission gear I is fixedly connected to the outside of the rotating shaft, a transmission gear II is arranged outside the transmission gear I, a transmission gear III is fixedly connected to the end of the transmission gear II, the transmission gear III rotates coaxially with the transmission gear II, a transmission plate is meshed with the outside of the transmission gear III, the transmission plate is slidably connected to the inner wall of the support, an insulating plate II is fixedly connected to the outside of the transmission plate, a sliding rheostat II is installed on the inner wall of the support, the insulating plate II is connected to the sliding piece in the sliding rheostat II, and the sliding rheostat II is connected in series in the circuit where the electromagnet is located.

[0014] Among them, the number of teeth of the transmission gear II is more than that of the transmission gear I, and the number of teeth of the transmission gear III is less than that of the transmission gear II.

[0015] Among them, the voltage stabilizing mechanism includes two storage tanks, which are respectively located at the tail end and the middle of the spray pipe, the storage tanks are communicated with the spray pipe, a rubber air bag is installed inside the storage tank, the rubber air bag divides the inside of the storage tank into upper and lower parts, the upper part of the storage tank is an air cavity, and the lower part of the storage tank is a water cavity communicated with the spray pipe.

[0016] Among them, a solenoid valve is installed at the connection between the storage tank located in the middle and the spray pipe, and a travel switch is installed on the inner wall of the support.

[0017] The present invention has at least the following beneficial effects: When the present application is in use, water is sent to the spray pipe through the arranged conveying mechanism, and the conveying mechanism detects the water flow velocity in real time and controls the adjusting mechanism to work when the water flow velocity increases. The adjusting mechanism increases the aperture of the spray holes, and increasing the aperture of the spray holes reduces the water flow resistance in the pipeline, making the water flow out more smoothly, reducing the continuous pressure of the fluid dynamic pressure on the pipeline, and reducing the risk of impact damage to the pipeline, valve and equipment caused by water hammer. The voltage stabilizing mechanism absorbs the energy of the water hammer pressure wave when the spraying stops, reducing the impact on the structural stability of the tower arm. And the conveying mechanism will also adaptively adjust the water delivery height when the tower arm rises. When the conveying mechanism adjusts the water delivery height, it controls the adjusting mechanism to work. The adjusting mechanism increases the aperture of the spray holes when the tower arm rises, and increasing the aperture can increase the droplet diameter, improve the wind drift resistance of the droplets, and more effectively adsorb the dust in the air. Brief Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the spraying structure of the present invention; Figure 3 It is a schematic front sectional view of the storage tank structure of the present invention; Figure 4 It is a schematic front sectional view of the adjusting mechanism structure of the present invention; Figure 5 It is a schematic diagram of the conveying mechanism structure of the present invention; Figure 6 It is a schematic side sectional view of the tower height detection member of the present invention; Figure 7 It is a schematic diagram of the connection relationship between the transmission gear three and the transmission plate of the present invention; Figure 8 It is Figure 7 the enlarged schematic diagram of area A in Figure 9 It is a schematic diagram of the connection relationship between the water inlet pipe and the fixed cylinder of the present invention; Figure 10 It is a schematic separated view of the flow velocity detection member structure of the present invention; Figure 11 It is a schematic side sectional view of the fixed cylinder of the present invention; Figure 12 It is a schematic front sectional view of the adjusting member of the present invention.

[0019] In the figure: 1. Water storage tank; 2. Spraying pipe; 20. Spraying holes; 3. Adjusting mechanism; 30. Baffle; 31. Connecting rod; 32. Towing member; 33. Return spring; 34. Iron sheet; 35. Electromagnet; 4. Water pump; 5. Conveying mechanism; 50. Water inlet pipe; 51. Support; 52. Fixed cylinder; 53. Rotating frame; 54. Connecting pipe; 55. Water delivery pipe; 56. Flow velocity detection member; 57. Tower height detection member; 58. Impeller; 59. Rotating rod; 510. Fixed disk; 511. Swing arm; 512. Centrifugal counterweight ball; 513. Moving disk; 514. Pull rod; 515. Adjusting member; 516. Transmission cylinder; 517. Pulling rope; 518. Guide frame; 519. Insulating plate one; 520. Placing box; 521. Compression spring; 522. Slide rheostat one; 523. Rotating shaft; 524. Transmission gear one; 525. Transmission gear two; 526. Transmission gear three; 527. Transmission plate; 528. Insulating plate two; 529. Slide rheostat two; 6. Voltage stabilizing mechanism; 60. Storage tank; 61. Rubber airbag; 62. Air cavity; 63. Water cavity; 64. Solenoid valve; 65. Travel switch. Detailed Description of the Invention

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment 1 Please refer to Figures 1 to 12 The present invention provides a technical solution: a dust removal spraying device for construction engineering, including a water storage tank 1; further including a spraying pipe 2, a plurality of spraying holes 20 are opened at the bottom of the spraying pipe 2; an adjusting mechanism 3, the adjusting mechanism 3 is located inside the spraying pipe 2, and the adjusting mechanism 3 adjusts the size of the spraying holes 20 according to the water pressure and the height of the tower arm; a water pump 4, the water pump 4 is communicated with the water storage tank 1; a conveying mechanism 5, the conveying mechanism 5 is respectively connected with the water pump 4 and the spraying pipe 2, the conveying mechanism 5 sends water to the spraying pipe 2, the conveying mechanism 5 detects the water flow velocity in real time, and controls the adjusting mechanism 3 to work when the water flow velocity increases, the adjusting mechanism 3 increases the size of the spraying holes 20, and the conveying mechanism 5 adaptively adjusts the water delivery height when the tower arm rises, and the conveying mechanism 5 controls the adjusting mechanism 3 to work when adjusting the water delivery height; a pressure stabilizing mechanism 6, the pressure stabilizing mechanism 6 is communicated with the spraying pipe 2, and the pressure stabilizing mechanism 6 absorbs the energy of the water hammer pressure wave when spraying stops.

[0022] During use, connect the water pump 4 to the water tank, the water tank is installed outside the tower crane, install the spraying pipe 2 on the tower arm of the tower crane, drive the spraying pipe 2 to move above the construction site by rotating the tower arm of the tower crane, and the staff starts the water pump 4 to pump the water in the water tank into the adjusting mechanism 3, and the spraying liquid entering is sent into the spraying pipe 2 through the adjusting mechanism 3, and the spraying liquid entering the spraying pipe 2 is sprayed on the construction site through the spraying holes 20.

[0023] When dust reduction is carried out on the construction site in windy weather, in order to avoid too fine droplets being blown away by the wind and interfering with the dust reduction range, the staff will increase the working power of the water pump 4, so that the flow velocity and pressure of the spraying liquid in the spraying pipe 2 will increase, and the conveying mechanism 5 will detect the water flow velocity in real time and control the adjusting mechanism 3 to work when the water flow velocity increases. The adjusting mechanism 3 increases the aperture of the spraying holes 20, increases the aperture of the spraying holes 20 to reduce the water flow resistance in the pipeline, makes the water flow out more smoothly, reduces the continuous pressure of the fluid dynamic pressure on the pipeline, and reduces the risk of impact damage to the pipeline, valve and equipment by the water hammer. The pressure stabilizing mechanism 6 absorbs the energy of the water hammer pressure wave when spraying stops, reducing the impact on the structural stability of the tower arm.

[0024] When the height of the tower crane boom increases, the water pressure of the tower crane spraying system will show a linear growth trend with the increase of the boom height. For every 10-meter increase in height, the static water pressure increases by about 0.1 MPa. At the same time, the superposition effect of pipeline resistance and dynamic pressure needs to be considered. Thus, the conveying mechanism 5 will adaptively adjust the water delivery height. When the conveying mechanism 5 adjusts the water delivery height, it controls the regulating mechanism 3 to work. When the boom rises, the regulating mechanism 3 increases the aperture of the spray holes 20. For example, when the height < 30 meters, nozzles with an aperture of 2 - 2.5 mm are used; when the height > 50 meters: the aperture is increased to 3 - 3.5 mm. Increasing the aperture can increase the droplet size, improve the wind drift resistance of the droplets, and more effectively adsorb dust in the air.

[0025] The regulating mechanism 3 includes a baffle 30 slidably connected to the inner wall of the spray pipe 2. The baffle 30 blocks part of the spray holes 20. A connecting rod 31 is fixedly connected to the outer side of the baffle 30. A traction member 32 is provided at one end of the connecting rod 31 away from the baffle 30. A return spring 33 is arranged outside the connecting rod 31. One end of the return spring 33 is fixed to the baffle 30, and the other end of the return spring 33 is fixed to the inner wall of the spray pipe 2.

[0026] The traction member 32 includes an iron sheet 34 fixedly connected to one end of the connecting rod 31 away from the baffle 30. An electromagnet 35 is installed on the inner wall of the spray pipe 2, and the electromagnet 35 is located outside the iron sheet 34.

[0027] When the regulating mechanism 3 works, the current intensity of the electromagnet 35 increases, thereby increasing the magnetic field intensity of the electromagnet 35, increasing the attraction force of the electromagnet 35 on the iron sheet 34. The electromagnet 35 attracts the iron sheet 34 to move closer. The iron sheet 34 pulls the connecting rod 31 to move, and the connecting rod 31 pulls the baffle 30. The movement of the baffle 30 will compress the return spring 33, making the elastic force generated by the deformation of the return spring 33 equal to the attraction force of the electromagnet 35 on the iron sheet 34. The movement of the baffle 30 reduces the area blocking the spray holes 20, realizing the adjustment of the aperture of the spray holes 20.

[0028] The conveying mechanism 5 includes a water inlet pipe 50 communicated with a water pump 4. A support 51 is provided outside one end of the water inlet pipe 50 away from the water pump 4. A fixed cylinder 52 is fixedly connected to the inner wall of the support 51. The fixed cylinder 52 is communicated with the water inlet pipe 50. A rotating frame 53 is rotatably connected to the inner wall of the support 51. A connecting pipe 54 is fixedly connected to the inner wall of the rotating frame 53. The connecting pipe 54 is L-shaped. One end of the connecting pipe 54 is hermetically and rotatably connected to the inner wall of the fixed cylinder 52. A water delivery pipe 55 is threadedly connected to the outside of the other end of the connecting pipe 54. The water delivery pipe 55 is spirally wound around the outside of the rotating frame 53. One end of the water delivery pipe 55 away from the connecting pipe 54 is communicated with the spray pipe 2. A flow velocity detection member 56 for detecting the water flow velocity is provided on the inner wall of the fixed cylinder 52, and a tower height detection member 57 for detecting the boom height is provided outside the rotating frame 53.

[0029] When the height of the tower arm of the tower crane remains unchanged, if the wind speed at the construction site changes, in order to avoid the influence of the airflow on the spray droplets, the staff will increase the power of the water pump 4. The increase in the power of the water pump 4 increases the flow rate of the spray liquid in the water inlet pipe 50. The flow rate detection component 56 detects the water flow rate in the fixed cylinder 52. When the water flow rate increases, the flow rate detection component 56 increases the current intensity in the circuit where the electromagnet 35 is located, so that the electromagnet 35 attracts the baffle 30 and increases the aperture of the spray hole 20.

[0030] When the height of the tower arm of the tower crane increases, the tower height detection component 57 detects the rising height of the tower arm. Since the static water pressure is proportional to the height, when the tower arm rises, the static water pressure will also increase. Therefore, the tower height detection component 57 also increases the current intensity in the circuit where the electromagnet 35 is located, so that the electromagnet 35 attracts the baffle 30 and increases the aperture of the spray hole 20. And when the height increases, the power of the water pump 4 also increases, so that the flow rate of the water in the fixed cylinder 52 also changes. The flow rate detection component 56 assists in increasing the current intensity in the circuit where the electromagnet 35 is located to jointly adjust the aperture of the spray hole 20.

[0031] The flow rate detection component 56 includes an impeller 58 located on the inner wall of the fixed cylinder 52. The impeller 58 is rotationally and sealingly connected to the inner wall of the fixed cylinder 52. One end of the impeller 58 penetrates through the inner wall of the fixed cylinder 52 and is fixedly connected with a rotating rod 59. A fixed disk 510 is fixedly connected to the outside of the rotating rod 59. Swing arms 511 are rotationally connected to both sides of the fixed disk 510. A centrifugal counterweight ball 512 is fixedly connected to the end of the swing arm 511 away from the fixed disk 510. A moving disk 513 is slidably connected to the outside of the rotating rod 59. Pull rods 514 are rotationally connected to both sides of the moving disk 513. One end of the pull rod 514 away from the moving disk 513 is rotationally connected to the swing arm 511. An adjusting component 515 for adjusting the magnetic field size of the electromagnet 35 according to the displacement amount of the moving disk 513 is provided at the bottom of the moving disk 513.

[0032] When the power of the water pump 4 increases, the water flow rate in the fixed cylinder 52 increases. When the water flow impacts the impeller 58, the rotation speed of the impeller 58 increases. The impeller 58 drives the rotation speed of the rotating rod 59 to increase. When the rotation speed of the rotating rod 59 increases, the rotating rod 59 drives the centrifugal counterweight ball 512 to rotate through the swing arm 511. Since the rotation speed of the rotating rod 59 increases, the rotation speed of the centrifugal counterweight ball 512 increases, and the centrifugal force when the centrifugal counterweight ball 512 rotates increases. The centrifugal counterweight ball 512 changes the inclination angle of the swing arm 511. The swing arm 511 drives the pull rod 514 to move. The pull rod 514 pulls the moving disk 513 to move upward along the surface of the rotating rod 59. When the moving disk 513 moves upward, it drives the adjusting component 515 to work. The adjusting component 515 changes the current intensity in the circuit where the electromagnet 35 is located, so as to adjust the attraction force of the electromagnet 35 on the iron sheet 34.

[0033] The adjusting member 515 includes a transmission cylinder 516 fixedly connected to the bottom of the moving disk 513, a pull rope 517 fixedly connected to the outer side of the transmission cylinder 516, a guide frame 518 fixedly connected to the outer side of the fixed cylinder 52. The guide frame 518 adjusts the running direction of the pull rope 517, and the pull rope 517 is slidably connected to the inner wall of the guide frame 518. One end of the pull rope 517 away from the transmission cylinder 516 is fixedly connected with an insulating plate 519. A placement box 520 is fixedly connected to the outer side of the fixed cylinder 52. The insulating plate 519 is slidably connected to the inner wall of the placement box 520. A compression spring 521 is fixedly connected to the outer side of the insulating plate 519, and the compression spring 521 is fixed to the inner wall of the placement box 520. A first sliding rheostat 522 is installed on the inner wall of the placement box 520. The insulating plate 519 is fixed to the sliding piece of the first sliding rheostat 522. The first sliding rheostat 522 is connected in series in the circuit where the electromagnet 35 is located.

[0034] When the moving disk 513 moves upward along the surface of the rotating rod 59, the moving disk 513 drives the transmission cylinder 516 to move upward. The transmission cylinder 516 pulls the pull rope 517, and the pull rope 517 drives the insulating plate 519 to slide along the inner wall of the placement box 520. The insulating plate 519 stretches the compression spring 521. When the insulating plate 519 slides along the inner wall of the placement box 520, it drives the sliding piece in the first sliding rheostat 522 to move, thereby adjusting the resistance value of the first sliding rheostat 522. And multiple electromagnets 35 are connected in parallel with each other, and the first sliding rheostat 522 is connected in series in the circuit where multiple electromagnets 35 are connected in parallel. Thus, when the moving disk 513 moves upward, the resistance value of the first sliding rheostat 522 decreases, and the current intensity input to the electromagnet 35 increases, so that the electromagnet 35 attracts the iron sheet 34 to approach, increasing the aperture of the spray hole 20.

[0035] The tower height detector 57 includes a rotating shaft 523 fixed to the outer side of the rotating frame 53. The rotating shaft 523 is rotatably connected to the inner wall of the support 51. The rotating shaft 523 is installed at the central part of the rotating frame 53. A first transmission gear 524 is fixedly connected to the outer side of the rotating shaft 523. A second transmission gear 525 is arranged outside the first transmission gear 524. A third transmission gear 526 is fixedly connected to the end of the second transmission gear 525. The third transmission gear 526 rotates coaxially with the second transmission gear 525. The number of teeth of the second transmission gear 525 is more than that of the first transmission gear 524. The number of teeth of the third transmission gear 526 is less than that of the second transmission gear 525. A transmission plate 527 is meshed with the outside of the third transmission gear 526. The transmission plate 527 is slidably connected to the inner wall of the support 51. An insulating plate two 528 is fixedly connected to the outside of the transmission plate 527. A second sliding rheostat 529 is installed on the inner wall of the support 51. The insulating plate two 528 is connected to the sliding piece in the second sliding rheostat 529. The second sliding rheostat 529 is connected in series in the circuit where the electromagnet 35 is located. The second sliding rheostat 529 is connected in series in the circuit where the first sliding rheostat 522 is located. The first sliding rheostat 522 adjusts the resistance value according to the water flow speed. The second sliding rheostat 529 adjusts the resistance value according to the tower arm height. After the two are connected in series, they jointly control the input current intensity of the electromagnet 35 to achieve multi-factor linkage adjustment.

[0036] When the height of the tower arm of the tower crane increases, the height of the spray pipe 2 increases, which pulls the water delivery pipe 55. Since the water delivery pipe 55 is spirally wound around the outer side of the rotating frame 53, when the height of the spray pipe 2 increases, the water delivery pipe 55 will pull the rotating frame 53 to rotate, thereby releasing the water delivery pipe 55 spirally wound around the outer side of the rotating frame 53. The rotation of the rotating frame 53 drives the connecting pipe 54 to rotate. The connecting pipe 54 rotates on the inner wall of the fixed cylinder 52. The rotation of the rotating frame 53 drives the rotating shaft 523 to rotate. The rotating shaft 523 drives the first transmission gear 524 to rotate. The first transmission gear 524 drives the second transmission gear 525 meshed with the outside to rotate.

[0037] On the tower arm with a height of 30 meters, the normal working water pressure of the spraying system is 0.3 MPa, and the water hammer pressure that may be generated when the valve is closed is 1 MPa; when the tower arm rises to 50 meters, the working water pressure becomes 0.5 MPa, and the water hammer pressure generated when the valve is closed may reach 1.5 MPa or even higher. Therefore, in this application, the number of teeth of the second transmission gear 525 is more than that of the first transmission gear 524. So when the rotating frame 53 rotates multiple circles, the second transmission gear 525 can rotate one circle. The rotation of the second transmission gear 525 drives the coaxial third transmission gear 526 to rotate. The third transmission gear 526 drives the transmission plate 527 to slide on the inner wall of the support 51. The transmission plate 527 drives the second insulating plate 528 to move. The second insulating plate 528 drives the slide plate in the second rheostat 529 to move. Since the static water pressure is proportional to the height, when the height of the tower arm increases, the resistance value of the second rheostat 529 decreases, causing the current in the circuit to increase, the aperture of the spray hole 20 to increase, reducing the continuous pressure of the fluid dynamic pressure on the pipeline, and reducing the risk of impact damage to the pipeline, valve and equipment caused by water hammer.

[0038] The voltage stabilizing mechanism 6 includes two storage tanks 60, which are respectively located at the tail end and the middle of the spray pipe 2. The storage tanks 60 are communicated with the spray pipe 2. A rubber air bag 61 is installed inside the storage tank 60. The rubber air bag 61 divides the inside of the storage tank 60 into upper and lower parts. The upper part of the storage tank 60 is an air chamber 62, and the lower part of the storage tank 60 is a water chamber 63 communicated with the spray pipe 2.

[0039] When the water pump 4 is closed, the water flow velocity instantly becomes zero, and its kinetic energy is converted into pressure energy, generating water hammer pressure. The water flow generates an instantaneous high-pressure shock wave due to inertia. The high-pressure water in the spray pipe 2 will rush into the water chamber 63 of the storage tank 60, pushing the rubber air bag 61 to expand towards the air chamber 62. The rubber air bag 61 squeezes the air chamber 62, and the air is compressed with a reduced volume. The kinetic energy of the water flow is converted into the elastic potential energy of the air, thereby absorbing the energy of the pressure wave and reducing the peak pressure in the pipeline. When the water hammer pressure wave decays, the compressed air expands, pushing the rubber air bag 61 to reset and slowly releasing the stored energy back into the pipeline to avoid a secondary water hammer caused by a sudden drop in pressure and reducing the impact force transmitted to the root of the tower arm.

[0040] Embodiment 2 In the second embodiment, other structures remain unchanged. Different from the first embodiment, an electromagnetic valve 64 is installed at the connection between the storage tank 60 in the middle and the spray pipe 2, and a travel switch 65 is installed on the inner wall of the support 51. Since the outer circumference of the rotating frame 53 is fixed, the rotation speed of the rotating frame 53 is associated with the height of the tower crane boom. Therefore, when the number of rotations of the rotating frame 53 makes the height of the boom reach 50 meters, the number of rotations of the rotating frame 53 drives through the transmission gear one 524, the transmission gear two 525, and the transmission gear three 526, so that the moving distance of the transmission plate 527 just triggers the travel switch 65. After the travel switch 65 is triggered, it controls the electromagnetic valve 64 to open, so that the storage tank 60 in the middle is connected to the spray pipe 2. When the height is less than 50 meters, only the storage tank 60 at the end of the boom is in a connected state, avoiding the problem that when the boom height is low, the total volume of the air chamber 62 is too large, the water hammer pressure wave is overly dispersed and absorbed, which instead reduces the stability of the water flow in the pipeline and causes the problem of "excessive air pressure fluctuation".

[0041] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust removal spraying device for construction engineering, comprising: Water storage tank; It is characterized in that: it further includes a spray pipe, and a plurality of spray holes are opened at the bottom of the spray pipe; An adjustment mechanism, the adjustment mechanism is located inside the spray pipe, and the adjustment mechanism adjusts the size of the spray holes according to the water pressure and the height of the tower arm; A water pump, the water pump is communicated with the water storage tank; A conveying mechanism, the conveying mechanism is respectively connected with the water pump and the spray pipe, the conveying mechanism sends water to the spray pipe, the conveying mechanism detects the water flow speed in real time, and controls the adjustment mechanism to work when the water flow speed increases, the adjustment mechanism increases the size of the spray holes, and the conveying mechanism adaptively adjusts the water delivery height when the tower arm rises, and the conveying mechanism controls the adjustment mechanism to work when adjusting the water delivery height; A pressure stabilizing mechanism, the pressure stabilizing mechanism is communicated with the spray pipe, and the pressure stabilizing mechanism absorbs the energy of the water hammer pressure wave when spraying stops.

2. The dust removal spraying device for construction engineering according to claim 1, wherein: The adjustment mechanism includes a baffle plate slidably connected to the inner wall of the spray pipe, the baffle plate blocks part of the spray holes, a connecting rod is fixedly connected to the outside of the baffle plate, a traction member is provided at one end of the connecting rod far away from the baffle plate, a return spring is arranged outside the connecting rod, one end of the return spring is fixed to the baffle plate, and the other end of the return spring is fixed to the inner wall of the spray pipe.

3. The dust removal spraying device for construction engineering according to claim 2, characterized in that: The traction member includes an iron sheet fixedly connected to one end of the connecting rod far away from the baffle plate, and an electromagnet is installed on the inner wall of the spray pipe, and the electromagnet is located outside the iron sheet.

4. The dust removal spraying device for construction engineering according to claim 3, wherein: The conveying mechanism includes a water inlet pipe communicated with the water pump, a support is arranged on the outer side of one end of the water inlet pipe far away from the water pump, a fixed cylinder is fixedly connected to the inner wall of the support, the fixed cylinder is communicated with the water inlet pipe, a rotating frame is rotatably connected to the inner wall of the support, a connecting pipe is fixedly connected to the inner wall of the rotating frame, the connecting pipe is L-shaped, one end of the connecting pipe is hermetically and rotatably connected to the inner wall of the fixed cylinder, a water delivery pipe is threadedly connected to the outer side of the other end of the connecting pipe, the water delivery pipe is spirally wound around the outside of the rotating frame, one end of the water delivery pipe far away from the connecting pipe is communicated with the spray pipe, a flow velocity detecting member for detecting the water flow speed is arranged on the inner wall of the fixed cylinder, and a tower height detecting member for detecting the height of the tower arm is arranged on the outside of the rotating frame.

5. The dust removal spray device for construction engineering according to claim 4, characterized in that: The flow velocity detecting member includes an impeller located on the inner wall of the fixed cylinder, the impeller is rotatably and hermetically connected to the inner wall of the fixed cylinder, one end of the impeller penetrates through the inner wall of the fixed cylinder and is fixedly connected with a rotating rod, a fixed disk is fixedly connected to the outside of the rotating rod, swing arms are rotatably connected to both sides of the fixed disk, a centrifugal counterweight ball is fixedly connected to one end of the swing arm far away from the fixed disk, a moving disk is slidably connected to the outside of the rotating rod, pull rods are rotatably connected to both sides of the moving disk, one end of the pull rod far away from the moving disk is rotatably connected to the swing arm, and an adjusting member for adjusting the magnetic field strength of the electromagnet according to the displacement amount of the moving disk is arranged at the bottom of the moving disk.

6. The dust removal spray device for construction engineering according to claim 5, characterized in that: The adjusting member includes a transmission cylinder fixedly connected to the bottom of the moving disk, a pulling rope fixedly connected to the outer side of the transmission cylinder, a guide frame fixedly connected to the outer side of the fixed cylinder, the pulling rope is slidably connected to the inner wall of the guide frame, one end of the pulling rope away from the transmission cylinder is fixedly connected with an insulating plate I, a placement box is fixedly connected to the outer side of the fixed cylinder, the insulating plate I is slidably connected to the inner wall of the placement box, a compression spring is fixedly connected to the outer side of the insulating plate I, the compression spring is fixed to the inner wall of the placement box, a sliding rheostat I is installed on the inner wall of the placement box, the insulating plate I is fixed to the sliding piece of the sliding rheostat I, and the sliding rheostat I is connected in series in the circuit where the electromagnet is located.

7. The dust removal spraying device for construction engineering according to claim 4, wherein: The tower height detection member includes a rotating shaft fixedly connected to the outer side of the rotating frame, the rotating shaft is rotatably connected to the inner wall of the support, the rotating shaft is installed at the central part of the rotating frame, a transmission gear I is fixedly connected to the outer side of the rotating shaft, a transmission gear II is arranged outside the transmission gear I, a transmission gear III is fixedly connected to the end of the transmission gear II, the transmission gear III rotates coaxially with the transmission gear II, a transmission plate is engaged with the outer side of the transmission gear III, the transmission plate is slidably connected to the inner wall of the support, an insulating plate II is fixedly connected to the outer side of the transmission plate, a sliding rheostat II is installed on the inner wall of the support, the insulating plate II is connected to the sliding piece in the sliding rheostat II, and the sliding rheostat II is connected in series in the circuit where the electromagnet is located.

8. The dust removal spraying device for construction engineering according to claim 7, wherein: The number of teeth of the transmission gear II is more than that of the transmission gear I, and the number of teeth of the transmission gear III is less than that of the transmission gear II.

9. The dust removal spraying device for construction engineering according to claim 7, wherein: The voltage stabilizing mechanism includes two storage tanks, the two storage tanks are respectively located at the tail end and the middle of the spray pipe, the storage tanks are communicated with the spray pipe, a rubber air bag is installed inside the storage tanks, the rubber air bag divides the inside of the storage tanks into upper and lower parts, the upper part of the storage tank is an air cavity, and the lower part of the storage tank is a water cavity communicated with the spray pipe.

10. The dust removal spray device for construction engineering according to claim 9, wherein: A solenoid valve is installed at the connection between the storage tank located in the middle and the spray pipe, and a travel switch is installed on the inner wall of the support.

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