A kind of house building wall spraying equipment

Abstract

The present invention relates to the technical field of building wall spraying equipment, and specifically discloses a house building wall spraying equipment, including a booster pump and a spray gun; also including a fixed extension rod; a movable extension rod, a hose section is provided in the middle of the movable extension rod; a limiting mechanism; a guide mechanism, the guide mechanism is located on the outside of the movable extension rod; and an expansion mechanism. When encountering a curved wall, this house building wall spraying equipment adjusts the inclination angle of the end of the movable extension rod according to the curvature of the spraying surface, so that the nozzle is roughly in a direction perpendicular to the tangent of the spraying point, thereby reducing the difficulty of operation for the staff. As the inclination amplitude of the movable extension rod increases, the expansion mechanism synchronously adjusts the curvature of the hose section, so that the curvature of the hose section matches the inclination angle at the nozzle of the movable extension rod, thereby preventing the sprayed paint from impacting the inner wall of the hose section due to the small bending angle of the hose section, preventing the hose section from being broken or blocked, and ensuring the smoothness of wall spraying.

Description

Technical Field

[0001] The invention relates to the technical field of building wall spraying equipment, in particular to a building wall spraying equipment. Background Art

[0002] House building wall spraying equipment is a mechanized tool designed specifically for house building wall construction. It is used to evenly spray paint, putty, mortar, waterproof coating and other materials onto the wall to achieve decoration, protection and other functions.

[0003] There are many types of wall spraying equipment. Among them, the high-pressure airless sprayer is a device that uses a high-pressure pumping system to give the paint powerful kinetic energy, thereby achieving efficient spraying. The equipment uses a plunger pump or diaphragm pump to pressurize the paint to 10-15MPa (about 100-350 times atmospheric pressure). The high-pressure paint is transported to the spray gun through a hose. The pressurized paint is sprayed from the nozzle in a high-speed fluid state (at a speed of up to 200-300m / s). The moment it leaves the nozzle, it expands violently due to the sudden drop in pressure, and atomizes into fine particles that evenly adhere to the surface of the substrate.

[0004] In house construction, domes and the outer sides of spiral staircases are usually curved surfaces. When workers use high-pressure airless sprayers to spray the curved surfaces, no matter whether the curved surface is convex or concave, they need to keep the spray gun perpendicular to the tangent direction of the spraying point (that is, the muzzle points to the center of the curved surface) to ensure vertical adhesion of the paint and avoid uneven coating thickness caused by oblique spraying. However, in actual operation, in order to ensure personal safety, the workers' center of gravity needs to be stabilized first, resulting in a limited range of workers' activities. In some areas, it is difficult to keep the spray gun perpendicular to the tangent direction of the spraying point. The paint hits the curved surface at an oblique angle, and the curved surface changes the paint spraying angle, resulting in "piling" at the edge or "thin coating" in the middle, affecting the spraying quality. For this reason, we propose a wall spraying equipment for house construction. Summary of the Invention

[0005] The purpose of the present invention is to provide a wall spraying equipment for building construction, so as to solve the problem proposed in the above background technology that in order to ensure personal safety, the center of gravity of the workers needs to be stabilized first, resulting in a limited range of movement of the workers. In some areas, it is difficult to keep the spray gun perpendicular to the tangent direction of the spraying point. The paint hits the curved surface at an inclined angle, and the curved surface changes the spray angle of the paint, causing "piling" at the edge or "thin coating" in the middle, affecting the spraying quality.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a building wall spraying device, comprising a booster pump and a spray gun, wherein a feed pipe is connected between the spray gun and the booster pump; a fixed extension rod, which is threadedly connected to the nozzle of the spray gun; a movable extension rod, which is rotatably and sealingly connected to the end of the fixed extension rod, and a hose section is provided in the middle of the movable extension rod;

[0007] A limiting mechanism is located outside the connection between the movable extension rod and the fixed extension rod, and the limiting mechanism limits the movable extension rod from freely rotating on the surface of the fixed extension rod;

[0008] The guide mechanism is located outside the movable extension rod, and the guide mechanism adjusts the inclination angle of the end of the movable extension rod according to the curvature of the spraying surface;

[0009] The expansion mechanism is connected to the guide mechanism. The greater the inclination of the movable extension rod, the greater the curvature of the hose section that is synchronously adjusted by the expansion mechanism.

[0010] Among them, the limiting mechanism includes an adjusting handle fixedly connected to the outside of the movable extension rod, the adjusting handle is rotatably connected to the outside of the fixed extension rod, the adjusting handle is slidingly connected to a plurality of limiting beads on the inner wall near one end of the fixed extension rod, a spring sheet is fixedly connected to the outside of the limiting beads, and the end of the spring sheet away from the limiting beads is fixed to the inner wall of the adjusting handle, and a plurality of limiting grooves that are engaged with the limiting beads are opened on the surface of the fixed extension rod, and the plurality of limiting grooves are evenly spaced on the surface of the fixed extension rod.

[0011] Among them, the guide mechanism includes a support frame fixed to the surface of the movable extension rod, an axis rod is fixedly connected to the outer side of the end of the movable extension rod, a fixing frame is provided on the outer side of the axis rod, the axis rod is rotatably connected to the inner wall of the fixing frame, the inner wall of the fixing frame is provided with an adjusting part for pushing the nozzle at the end of the movable extension rod to move, and a detection part is provided on the outer side of the fixing frame for controlling the distance the adjusting part pushes the movable extension rod.

[0012] Among them, the adjusting part includes an electric telescopic rod installed on the surface of the fixed frame, a button battery pack is installed on the surface of the fixed frame, the button battery pack is connected to the electric telescopic rod, a slider is fixedly connected to the output end of the electric telescopic rod, and a sliding groove is opened on the surface of the movable extension rod to be slidably connected to the slider.

[0013] Among them, the detection part includes a fixed tube 1 and a fixed tube 2 located on the outside of the fixed frame. The fixed tube 1 and the fixed tube 2 are respectively fixed to the surface of the fixed frame, and the fixed tube 1 and the fixed tube 2 are symmetrically distributed on both sides of the fixed frame. The top of the fixed tube 1 is fixedly connected to an adjustment seat, the adjustment seat is fixed to the support frame, and the expansion mechanism is connected to the adjustment seat.

[0014] Among them, the inner wall of the fixed cylinder is slidably connected to a guide rod, the top of the guide rod is fixedly connected to a piston plate, the piston plate is slidably and sealedly connected to the inner wall of the fixed cylinder, the top of the piston plate is fixedly connected to a compression spring, the compression spring is fixed to the inner wall of the fixed cylinder, a sliding rheostat is installed on the inner wall of the fixed cylinder, a current sensor is provided on the outside of the sliding rheostat, the sliding rheostat includes a resistor body and a slider, an insulating sheet is fixed to the outside of the slider, the insulating sheet is fixed to the guide rod, the outside of the sliding rheostat is connected to a voltage sensor, a controller is installed on the surface of the support frame, and the controller is connected to the voltage sensor.

[0015] Among them, the inner wall of the fixed cylinder is slidably connected to the guide rod 2, the top of the guide rod 2 is fixedly connected to the compression spring 2, the compression spring 2 is fixed to the inner wall of the fixed cylinder 2, the inner wall of the fixed cylinder 2 is installed with a sliding rheostat 2, the sliding rheostat 2 includes a resistor body 2 and a slider 2, the outer side of the slider 2 is fixedly connected to an insulating sheet 2, the insulating sheet 2 is fixed to the guide rod 2, the outer side of the sliding rheostat 2 is connected to a voltage sensor 2, and the voltage sensor 2 is connected to the controller.

[0016] Among them, the expansion mechanism includes an expansion block that is slidably connected to the inner wall of the adjustment seat, the expansion block is fixedly connected to a piston plate 2 near one end of the adjustment seat, an air guide hole is opened on the inner wall of the adjustment seat, the piston plate 2 is slidably and sealedly connected to the inner wall of the air guide hole, the air guide hole is connected to the fixed cylinder 1, a return spring is fixedly connected to the outer side of the piston plate 2, the return spring is fixed to the inner wall of the air guide hole at one end away from the piston plate 2, a placement cavity is opened on the inner wall of the expansion block, and an expansion component is provided on the inner wall of the placement cavity. The expansion component adjusts the expansion amplitude according to the moving distance of the guide rod 1 and the guide rod 2.

[0017] The cam is provided with a plurality of expansion plates, and one end of the two expansion plates is rotatably connected to the inner wall of the placement chamber. A rotating rod is provided between the two expansion plates, and the rotating rod is rotatably connected to the inner wall of the placement chamber. A winding wheel is fixedly connected to the outer side of the rotating rod, and a pull rope is wrapped around the outer side of the winding wheel. A fixed box is fixedly connected to the inner wall of the placement chamber, and an iron sheet is slidably connected to the inner wall of the fixed box. The iron sheet is fixed to the pull rope, and an electromagnet is installed on the inner wall of the fixed box. The position of the electromagnet corresponds to the iron sheet. The sliding rheostat 1 and the sliding rheostat 2 are connected in series in the circuit where the electromagnet is located. A vortex spring is fixedly connected to the outer side of one end of the rotating rod. The vortex spring is installed on the inner wall of the expansion block. The two ends of the rod are respectively fixedly connected with a transmission gear 1, a transmission gear 2 is meshed above one transmission gear 1, and a transmission gear 3 is meshed below the other transmission gear 1, and the transmission gear 2 and the transmission gear 3 are respectively rotatably connected to the inner wall of the placement cavity, and the outer side of the transmission gear 2 is meshed with a transmission tooth plate 1, and the transmission tooth plate 1 is slidably connected to the inner wall of the placement cavity, and the upper part of the transmission tooth plate 1 is rotatably connected to a sliding seat 1, and the sliding seat 1 is slidably connected to the inner wall of the expansion plate located above, and the outer side of the transmission gear 3 is meshed with a transmission tooth plate 2, and the transmission tooth plate 2 is slidably connected to the inner wall of the placement cavity, and the lower part of the transmission tooth plate 2 is rotatably connected to the sliding seat 2, and the sliding seat 2 is slidably connected to the inner wall of the expansion plate located below.

[0018] The bottoms of the guide rod 1 and the guide rod 2 are rotatably connected with balls.

[0019] The present invention has at least the following beneficial effects:

[0020] When spraying, the worker holds the spray gun and aims the nozzle at the end of the movable extension rod at the wall spraying area. When encountering a curved wall, the guide mechanism adjusts the inclination angle of the end of the movable extension rod according to the curvature of the spraying surface, so that the nozzle is roughly perpendicular to the tangent of the spraying point. Compared with manual control, it is more precise and reduces the difficulty of operation for the worker. As the inclination amplitude of the movable extension rod increases, the expansion mechanism synchronously adjusts the curvature of the hose section to match the curvature of the hose section with the inclination angle of the nozzle of the movable extension rod, so as to avoid the sprayed paint from impacting the inner wall of the hose section due to the small bending angle of the hose section, avoid rupture or blockage of the hose section, and ensure smooth wall spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the main view of the spray gun structure of the present invention;

[0023] Figure 3 This is a schematic cross-sectional view of the structural limiting mechanism of the present invention;

[0024] Figure 4 for Figure 3Enlarged schematic diagram of area A in the middle;

[0025] Figure 5 This is a schematic structural diagram of the guide mechanism of the present invention;

[0026] Figure 6 This is a schematic cross-sectional view of the guide mechanism of the present invention;

[0027] Figure 7 for Figure 6 Enlarged schematic diagram of area B in the middle;

[0028] Figure 8 for Figure 6 Enlarged schematic diagram of area C in the middle;

[0029] Figure 9 is a cross-sectional schematic diagram of the expansion mechanism of the present invention;

[0030] Figure 10 for Figure 9 Enlarged schematic diagram of the middle D area;

[0031] Figure 11 This is a schematic cross-sectional view of the expansion block of the structure of the present invention;

[0032] Figure 12 This is a schematic diagram of the structure of the expansion piece of the present invention;

[0033] Figure 13 This is a simplified diagram of the calculation principle of the present invention.

[0034] In the figure: 1. Booster pump; 2. Spray gun; 3. Feed pipe; 4. Fixed extension rod; 5. Movable extension rod; 50. Hose section; 6. Limiting mechanism; 60. Adjusting handle; 61. Limiting bead; 62. Spring sheet; 63. Limiting slot; 7. Guide mechanism; 70. Support frame; 71. Shaft rod; 72. Fixed frame; 73. Adjusting member; 74. Detecting member; 75. Electric telescopic rod; 76. Button battery pack; 77. Slider; 78. Slide slot; 79. Fixed cylinder 1; 710. Fixed cylinder 2; 711. Adjusting seat; 712. Guide rod 1; 713. Piston plate 1; 714. Compression spring 1; 715. Sliding rheostat 1; 716. Current sensor; 717. Resistor 1; 718. Slider 1; 719. Insulating sheet 1; 720. Voltage sensor Device one; 721. Controller; 722. Guide rod two; 723. Compression spring two; 724. Sliding rheostat two; 725. Resistor two; 726. Slide two; 727. Insulation sheet two; 728. Voltage sensor two; 8. Expansion mechanism; 80. Expansion block; 81. Piston plate two; 82. Air guide hole; 83. Reset spring; 84. Placement chamber; 85. Expanding piece; 86. Expanding plate; 87. Rotating rod; 88. Winding wheel; 89. Pull rope; 810. Fixed box; 811. Iron sheet; 812. Electromagnet; 813. Vortex spring; 814. Transmission gear one; 815. Transmission gear two; 816. Transmission gear three; 817. Transmission gear plate one; 818. Sliding seat one; 819. Transmission gear plate two; 820. Sliding seat two; 9. Ball bearing. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] Example 1

[0037] See also Figures 1 to 13The present invention provides a technical solution: a wall spraying equipment for building construction, comprising a booster pump 1 and a spray gun 2, wherein a feed pipe 3 is connected between the spray gun 2 and the booster pump 1; the equipment also comprises a fixed extension rod 4, which is threadedly connected to the nozzle of the spray gun 2; a movable extension rod 5, which is rotatably and sealedly connected to the end of the fixed extension rod 4, and a hose section 50 is provided in the middle of the movable extension rod 5; a limiting mechanism 6, which is located outside the connection between the movable extension rod 5 and the fixed extension rod 4, and the limiting mechanism 6 limits the free rotation of the movable extension rod 5 on the surface of the fixed extension rod 4; a guide mechanism 7, which is located outside the movable extension rod 5, and the guide mechanism 7 adjusts the inclination angle of the end of the movable extension rod 5 according to the curvature of the spraying surface; an expansion mechanism 8, which is connected to the guide mechanism 7, and the greater the inclination amplitude of the movable extension rod 5, the greater the curvature of the hose section 50 is synchronously adjusted by the expansion mechanism 8.

[0038] When in use, the booster pump 1 is connected to the spray gun 2 through the feed pipe 3 to ensure that the paint delivery system is sealed and leak-free. The fixed extension rod 4 is threadedly connected to the nozzle of the spray gun 2. Since the movable extension rod 5 is rotatably sealed and connected to the end of the fixed extension rod 4, it is ensured that the movable extension rod 5 can rotate freely and has good sealing. The rotation angle of the movable extension rod 5 is limited by the limit mechanism 6. The movable extension rod 5 and the fixed extension rod 4 are kept fixed to adapt to spraying on convex arc walls or concave arc wall surfaces. When spraying, the staff holds the spray gun 2 and points the nozzle at the end of the movable extension rod 5 at the wall. In the spraying area, when encountering a curved wall, the guide mechanism 7 adjusts the inclination angle of the end of the movable extension rod 5 according to the curvature of the spraying surface, so that the nozzle is roughly in a direction perpendicular to the tangent of the spraying point. Compared with manual control, it is more accurate and reduces the difficulty of operation for the staff. As the inclination amplitude of the movable extension rod 5 increases, the expansion mechanism 8 synchronously adjusts the curvature of the hose section 50 so that the curvature of the hose section 50 matches the inclination angle at the nozzle of the movable extension rod 5, thereby avoiding the sprayed paint from impacting the inner wall of the hose section 50 due to the small bending angle of the hose section 50, avoiding the hose section 50 from rupturing or clogging, and ensuring the smoothness of wall spraying.

[0039] The limiting mechanism 6 includes an adjusting handle 60 fixedly connected to the outside of the movable extension rod 5, and the adjusting handle 60 is rotatably connected to the outside of the fixed extension rod 4. The adjusting handle 60 is slidingly connected to a plurality of limiting beads 61 on the inner wall of one end close to the fixed extension rod 4, and a spring sheet 62 is fixedly connected to the outside of the limiting bead 61. The spring sheet 62 is fixed to the inner wall of the adjusting handle 60 at one end away from the limiting bead 61, and a plurality of limiting grooves 63 that are engaged with the limiting beads 61 are provided on the surface of the fixed extension rod 4, and the plurality of limiting grooves 63 are evenly spaced on the surface of the fixed extension rod 4.

[0040] When spraying on a concave arc wall or a convex arc wall, the position of the guide mechanism 7 needs to be changed to adjust the end of the movable extension rod 5 to tilt in different directions, and the guide mechanism 7 is arranged on the outside of the movable extension rod 5. Therefore, when the position of the guide mechanism 7 needs to be adjusted, the staff rotates the adjustment handle 60, and the adjustment handle 60 drives the movable extension rod 5 to rotate. The movable extension rod 5 and the fixed extension rod 4 rotate relative to each other, and when the adjustment handle 60 is rotated, the adjustment handle 60 drives the internal limiting bead 61 to move together. Since the limiting bead 61 is initially stuck in the limiting groove 63 on the surface of the fixed extension rod 4, the limiting bead 61 is pre-pressed by the spring sheet 62 to provide engagement resistance, so that the adjustment handle 60 drives the internal When the limiting bead 61 moves, the limiting bead 61 and the surface of the limiting groove 63 squeeze each other, so that the limiting bead 61 squeezes the spring sheet 62, causing the spring sheet 62 to deform, and the limiting bead 61 slides into the inner wall of the adjusting handle 60 and separates from the limiting groove 63. At this time, the staff can rotate the adjusting handle 60 on the surface of the fixed extension rod 4. When the limiting bead 61 rotates to correspond to the position of other limiting grooves 63, the spring sheet 62 in a compressed state will push the limiting bead 61 to move outward, so that the limiting bead 61 is stuck in the limiting groove 63, and the limiting bead 61 is pre-pressed by the spring sheet 62 to provide engagement resistance, thereby realizing the limitation of the adjusting handle 60. Therefore, the staff can adjust the position of the guide mechanism 7 by repeating the above process.

[0041] The guide mechanism 7 includes a support frame 70 fixed to the surface of the movable extension rod 5, a shaft 71 is fixedly connected to the outer side of the end of the movable extension rod 5, a fixing frame 72 is provided on the outer side of the shaft 71, the shaft 71 is rotatably connected to the inner wall of the fixing frame 72, an adjusting member 73 is provided on the inner wall of the fixing frame 72 for pushing the nozzle at the end of the movable extension rod 5 to move, and a detection member 74 is provided on the outer side of the fixing frame 72 for controlling the distance pushed by the adjusting member 73 to push the movable extension rod 5.

[0042] When the guide mechanism 7 adjusts the inclination angle of the port of the movable extension rod 5, the detection part 74 detects the curvature of the walls on both sides of the movable extension rod 5, and establishes an inclined plane model according to the changes in the curvature on both sides of the movable extension rod 5. The adjustment part 73 pushes the movable extension rod 5 close to the position of the hose section 50 according to the established inclined plane model. Since the hose section 50 is made of rubber material, it will deform when it is pushed by the adjustment part 73, so that the end of the movable extension rod 5 rotates around the shaft 71, and then the direction of the nozzle of the movable extension rod 5 is adjusted so that the nozzle is roughly in a direction perpendicular to the tangent of the spraying point. Compared with manual control, it is more accurate and reduces the difficulty of operation for staff.

[0043] The adjusting member 73 includes an electric telescopic rod 75 mounted on the surface of the fixing frame 72, a button battery pack 76 is mounted on the surface of the fixing frame 72, the button battery pack 76 is connected to the electric telescopic rod 75, a slider 77 is fixedly connected to the output end of the electric telescopic rod 75, and a sliding groove 78 is provided on the surface of the movable extension rod 5 to be slidably connected to the slider 77.

[0044] The button battery pack 76 is a battery combination with specific electrical properties such as voltage, current and capacity formed by connecting multiple button batteries in series, parallel or a combination of series and parallel. It is a mature existing technology on the market. The button battery pack 76 is used to power the electric telescopic rod 75, and the electric telescopic rod 75 is a mature existing technology on the market. It is a mechanical device that realizes linear telescopic motion through electric drive. It is powered by a built-in motor (such as a stepper motor). The rotational motion of the motor is converted into linear extension and contraction of the telescopic rod through transmission mechanisms such as gears, screws, and racks. The stepper motor accurately controls the number of rotations through pulse signals, which directly corresponds to the movement distance of the telescopic rod (for example, the screw advances 1 mm for each rotation).

[0045] When the adjustment mechanism is working, the button battery pack 76 powers the stepper motor in the electric telescopic rod 75. When the electric telescopic rod 75 extends, it drives the slider 77 to move along the extension direction of the electric telescopic rod 75. When the slider 77 moves, it squeezes the movable extension rod 5, causing the slider 77 to slide on the inner wall of the slide groove 78 on the surface of the movable extension rod 5. The movable extension rod 5 is pushed to rotate around the shaft 71. The rotation angle control principle is as follows:

[0046] Since the slider 77 moves only along the extension direction of the electric telescopic rod 75, and the extension direction of the electric telescopic rod 75 is perpendicular to the rod body of the fixed extension rod 4, the initial position of the slider 77 and the position of the shaft rod 71 can be approximately considered to be on the same straight line. That is, let the distance between the slider 77 and the shaft rod 71 be L, let the distance moved by the slider 77 in the extension direction of the electric telescopic rod 75 be X, and let the angle of rotation of the movable extension rod 5 around the shaft rod 71 be a (0 < a < 90°), then:

[0047] tan(a)=X / L.

[0048] The detection part 74 includes a fixed cylinder 1 79 and a fixed cylinder 2 710 located on the outside of the fixed frame 72. The fixed cylinder 1 79 and the fixed cylinder 2 710 are respectively fixed to the surface of the fixed frame 72, and the fixed cylinder 1 79 and the fixed cylinder 2 710 are symmetrically distributed on both sides of the fixed frame 72. The top of the fixed cylinder 1 79 is fixedly connected to an adjustment seat 711, the adjustment seat 711 is fixed to the support frame 70, and the expansion mechanism 8 is connected to the adjustment seat 711.

[0049] The inner wall of the fixed cylinder 79 is slidably connected to a guide rod 712, and the top of the guide rod 712 is fixedly connected to a piston plate 713. The piston plate 713 is slidably and sealedly connected to the inner wall of the fixed cylinder 79. The top of the piston plate 713 is fixedly connected to a compression spring 714, which is fixed to the inner wall of the fixed cylinder 79. A sliding rheostat 715 is installed on the inner wall of the fixed cylinder 79. A current sensor 716 is provided on the outside of the sliding rheostat 715. The current sensor 716 is connected in series to the circuit composed of the sliding rheostat 1 715 and the sliding rheostat 2 724. The sliding rheostat 715 includes a resistor 717 and a slider 718. An insulating sheet 719 is fixed to the outside of the slider 718. The insulating sheet 719 is fixed to the guide rod 712. The outside of the sliding rheostat 715 is connected to a voltage sensor 720. A controller 721 is installed on the surface of the support frame 70. The controller 721 is connected to the voltage sensor 720.

[0050] The inner wall of the fixed cylinder 710 is slidably connected to a guide rod 722, and the top of the guide rod 722 is fixedly connected to a compression spring 723, which is fixed to the inner wall of the fixed cylinder 710. The inner wall of the fixed cylinder 710 is installed with a sliding rheostat 724, which includes a resistor 725 and a slider 726. The outer side of the slider 726 is fixedly connected to an insulating sheet 727, which is fixed to the guide rod 722. The outer side of the sliding rheostat 724 is connected to a voltage sensor 728, and the voltage sensor 728 is connected to the controller 721.

[0051] The controller 721 is a single-chip microcomputer of the Arduino series in the prior art, which has real-time computing capabilities. The controller 721 is connected to the stepping motor in the electric telescopic rod 75.

[0052] Guide rod 1 712 and guide rod 2 722 are respectively on both sides of the movable extension rod 5. Guide rod 1 712 and guide rod 2 722 are the same length and symmetrical about the movable extension rod 5. The distance between guide rod 1 712 and guide rod 2 722 is 20 cm. When using a high-pressure airless spray gun to spray the wall, the spraying fan is 30 to 40 cm. When spraying, adjacent fan surfaces need to overlap by 1 / 3-1 / 2 (for example, if the fan surface is 30 cm wide, the overlap is 10 to 15 cm) to avoid missing spraying or uneven coating. Therefore, when the detection part 74 is in use, the staff adjusts the position of guide rod 1 712 and guide rod 2 722 so that the height of the wall contacted by guide rod 1 712 is higher than the wall contacted by guide rod 2 722.

[0053] The length of guide rod 1 712 and guide rod 2 722 is longer than the length of movable extension rod 5, so when movable extension rod 5 is close to the wall, guide rod 1 712 and guide rod 2 722 have already contacted with the wall and squeezed, that is, guide rod 1 712 slides on the inner wall of fixed cylinder 1 79, guide rod 1 712 drives piston plate 1 713 to slide along the inner wall of fixed cylinder 1 79, piston plate 1 713 squeezes compression spring 1 714, and when guide rod 1 712 slides on the inner wall of fixed cylinder 1 79, guide rod 1 712 drives insulating sheet 1 719 to move, insulating sheet 1 719 drives slider 1 718 to move on the surface of resistor body 1 717 of sliding rheostat 1 715. The greater the distance slider 1 718 moves on the surface of resistor body 1 717, the smaller the resistance value of sliding rheostat 1 715 in the circuit.

[0054] When the guide rod 2 722 slides on the inner wall of the fixed cylinder 2 710, the guide rod 2 722 squeezes the compression spring 2 723. When the guide rod 2 722 moves, it also drives the insulating sheet 2 727 to move. The insulating sheet 2 727 drives the slider 2 726 to slide on the surface of the resistor body 2 725 of the sliding rheostat 2 724. The greater the distance that the slider 2 726 slides on the surface of the resistor body 2 725, the greater the resistance value of the sliding rheostat 2 724 in the circuit.

[0055] A voltage sensor is an electronic device used to detect voltage signals in a circuit and convert them into electrical signals (such as current, voltage, digital signals, etc.) that are easy to measure, process, or transmit. Voltage sensor 1 720 is connected in parallel to the circuit composed of sliding rheostat 1 715 and sliding rheostat 2 724. Thus, voltage sensor 1 720 detects the potential difference between the two ends of sliding rheostat 1 715 after guide rod 1 712 slides on the inner wall of fixed cylinder 1 79, and sends the voltage signal to controller 721.

[0056] The current sensor 716 is an electronic component in the prior art that is used to detect the current size in a circuit and convert the current signal into an electrical signal (such as voltage, digital signal, etc.) that is easy to measure, process or transmit. Since the current sensor 716 is connected in series to the circuit composed of the sliding rheostat 1 715 and the sliding rheostat 2 724, the current intensity in the circuit composed of the sliding rheostat 1 715 and the sliding rheostat 2 724 can be measured. The current sensor 716 is connected to the controller 721 and sends the detected information to the controller 721.

[0057] Since both sliding rheostat 1 715 and sliding rheostat 2 724 are linear sliding rheostats, and sliding rheostat 1 715 and sliding rheostat 2 724 are of the same model, but have different wiring methods in the circuit, the resistor body material adopts linear resistor material with uniform cross-sectional area (such as constantan wire, nickel-chromium alloy wire), whose resistivity is uniform and the resistance value per unit length is constant. When the slider moves, the length of the resistance wire connected to the circuit changes uniformly, and the resistance value is directly proportional to the moving distance (R=K*S, K is the resistance per unit length, and S is the connection length).

[0058] Assume that the current intensity detected by the current sensor 716 is I, the potential difference across the sliding resistor 1 715 detected by the voltage sensor 1 720 is U1, and the potential difference across the sliding resistor 2 724 detected by the voltage sensor 2 728 is U2;

[0059] Therefore, the resistance of the sliding rheostat 715 after the guide rod 712 moves is: R1=U1 / I;

[0060] The resistance of the sliding rheostat 724 after the guide rod 722 moves: R2 = U2 / I;

[0061] Therefore, the sliding distance of the guide rod 712 on the inner wall of the fixed cylinder 79 is: S1=U1 / (K*I);

[0062] Sliding distance of the second guide rod 722 on the inner wall of the second fixed cylinder 710: S2 = U2 / (K*I);

[0063] In the inclined plane formed by the ends of guide rod 1 712 and guide rod 2 722, the initial distance between guide rod 1 712 and guide rod 2 722 is M (M = 20 cm). If the end 5 of the movable extension rod is rotated to a direction perpendicular to the inclined plane formed by the ends of guide rod 1 712 and guide rod 2 722, the rotation angle is a. In the triangular model formed by the initial and post-movement positions of the ends of guide rod 1 712 and guide rod 2 722, tan(a) = (S1 - S2) / M.

[0064] In the above text, it is proposed that tan (a) = X / L;

[0065] Therefore, the extension and contraction amount of the electric telescopic rod 75 is: X = (S1-S2) * L / M (assuming M = 20 cm, L is a fixed value);

[0066] The controller 721 receives data from the voltage sensor 1 720 , the voltage sensor 2 728 and the current sensor 716 , and calculates the extension and contraction amount of the electric telescopic rod 75 after each movement, thereby controlling the operation of the stepping motor in the electric telescopic rod 75 .

[0067] The larger the difference between S1 and S2, the steeper the slope, and the end of the movable extension rod 5 is located above the middle of the slope. Although during actual spraying, there is an arc surface between the end of the guide rod 1 712 and the end of the guide rod 2 722, the distance between the guide rod 1 712 and the guide rod 2 722 is smaller than the spray fan of the end of the movable extension rod 5. Therefore, even if it is not completely consistent, the spray material sprayed from the end of the movable extension rod 5 will be roughly in a direction perpendicular to the tangent of the spraying point, which is more accurate than manual control and reduces the difficulty of operation for staff.

[0068] The expansion mechanism 8 includes an expansion block 80 that is slidably connected to the inner wall of the adjustment seat 711. The expansion block 80 is fixedly connected to a piston plate 2 81 at one end close to the adjustment seat 711. An air guide hole 82 is provided on the inner wall of the adjustment seat 711. The piston plate 2 81 is slidably and sealedly connected to the inner wall of the air guide hole 82. The air guide hole 82 is connected to the fixed cylinder 1 79. A return spring 83 is fixedly connected to the outer side of the piston plate 2 81. The return spring 83 is fixed to the inner wall of the air guide hole 82 at one end away from the piston plate 2 81. A placement cavity 84 is provided on the inner wall of the expansion block 80. An expansion component 85 is provided on the inner wall of the placement cavity 84. The expansion component 85 adjusts the expansion amplitude according to the moving distance of the guide rod 1 712 and the guide rod 2 722.

[0069] When the guide rod 1 712 slides on the inner wall of the fixed cylinder 1 79 and the guide rod 2 722 slides on the inner wall of the fixed cylinder 2 710, since the moving distance of the guide rod 1 712 is greater than the moving distance of the guide rod 2 722, that is, S1>S2, in the circuit where the sliding rheostat 1 715 and the sliding rheostat 2 724 are located, the sum of the resistance values ​​of the sliding rheostat 1 715 and the sliding rheostat 2 724 is (R1+R2). Since the greater the difference between S1-S2, the steeper the slope, the greater the extension of the electric telescopic rod 75, but the smaller the sum of the resistance values ​​of the sliding rheostat 1 715 and the sliding rheostat 2 724, that is, the circuit where the sliding rheostat 1 715 and the sliding rheostat 2 724 are located. The greater the current intensity in, the greater the expansion range of the expansion member 85, which prevents the sprayed paint from impacting the inner wall of the hose section 50 due to the small bending angle of the hose section 50, prevents the hose section 50 from breaking or clogging, and ensures the smoothness of wall spraying. When the guide rod 1 712 drives the piston plate to slide on the inner wall of the fixed cylinder 1 79, the piston plate 1 713 injects the gas in the fixed cylinder 1 79 into the air guide hole 82, and the air pressure in the air guide hole 82 increases, thereby pushing the piston plate 2 81 to move, and the piston plate 2 81 stretches the reset spring 83. When the piston plate 2 81 moves, it pushes the expansion block 80 to approach the hose section 50 of the movable extension rod 5, thereby preliminarily adjusting the bending curvature of the hose section 50.

[0070] The unfolding member 85 includes an unfolding plate 86 located on the inner wall of the placement chamber 84. There are two unfolding plates 86, and one end of the two unfolding plates 86 is rotatably connected to the inner wall of the placement chamber 84. A rotating rod 87 is provided between the two unfolding plates 86. The rotating rod 87 is rotatably connected to the inner wall of the placement chamber 84. A reel 88 is fixedly connected to the outer side of the rotating rod 87. A pull rope 89 is wound around the outer side of the reel 88. A fixed box 810 is fixedly connected to the inner wall of the placement chamber 84. An iron sheet 811 is slidably connected to the inner wall of the fixed box 810. The iron sheet 811 is fixed to the pull rope 89. An electromagnet 812 is installed on the inner wall of the fixed box 810. The position of the electromagnet 812 corresponds to that of the iron sheet 811. A sliding rheostat 1 715 and a sliding rheostat 2 724 are connected in series in the circuit where the electromagnet 812 is located. A vortex spring 813 is fixedly connected to the outer side of one end of the rotating rod 87. The vortex spring 813 is installed on the inner wall of the expansion block 80. The two ends of the movable rod 87 are respectively fixedly connected with a transmission gear 1 814, a transmission gear 2 815 is meshed above one transmission gear 1 814, and a transmission gear 3 816 is meshed below the other transmission gear 1 814. The transmission gear 2 815 and the transmission gear 3 816 are respectively rotatably connected to the inner wall of the placement cavity 84, the outer side of the transmission gear 2 815 is meshed with a transmission tooth plate 1 817, and the transmission tooth plate 1 817 is slidably connected to the inner wall of the placement cavity 84, the upper part of the transmission tooth plate 1 817 is rotatably connected to a sliding seat 1 818, and the sliding seat 1 818 is slidably connected to the inner wall of the expansion plate 86 located above, the outer side of the transmission gear 3 816 is meshed with a transmission tooth plate 2 819, and the transmission tooth plate 2 819 is slidably connected to the inner wall of the placement cavity 84, the lower part of the transmission tooth plate 2 819 is rotatably connected to the sliding seat 2 820, and the sliding seat 2 820 is slidably connected to the inner wall of the expansion plate 86 located below.

[0071] The sliding rheostat 1 715, the sliding rheostat 2 724, and the electromagnet 812 are connected in series in the same circuit. As a result, the greater the difference between S1 and S2, the steeper the slope, and the greater the extension of the electric telescopic rod 75. However, the smaller the sum of the resistance values ​​of the sliding rheostat 1 715 and the sliding rheostat 2 724, the greater the current intensity of the electromagnet 812, and the greater the attraction of the electromagnet 812 to the iron sheet 811, thereby attracting the iron sheet 811 to slide along the inner wall of the fixed box 810. When the iron sheet 811 moves, it drives the pull rope 89, the pull rope 89 drives the winding wheel 88, and the winding wheel 88 drives the rotating rod 87 to rotate. The rotating rod 87 reels the vortex spring 813, and the vortex spring 813 deforms to cooperate with the electromagnet 812. When the magnetic field decreases, the rotating rod 87 is driven to reverse, and the rotating rod 87 simultaneously drives the two transmission gears 1 814 to rotate. The two transmission gears 1 814 respectively drive the transmission gear 2 815 and the transmission gear 3 816 to rotate, so that the rotation direction of the transmission gear 2 815 and the transmission gear 3 816 are opposite. Since the transmission gear plate 1 817 is engaged with the transmission gear 2 815, and the transmission gear plate 2 819 is engaged with the transmission gear 3 816, the movement directions of the transmission gear plate 1 817 and the transmission gear plate 2 819 are opposite, so that the transmission gear plate 1 817 and the transmission gear plate 2 819 respectively push the two expansion plates 86 to expand outward, dynamically adjust the curvature of the hose section 50, and maintain the stability and sealing of the paint delivery.

[0072] Example 2

[0073] In the second embodiment, other structures remain unchanged. The difference from the first embodiment is that the bottom of the guide rod 1 712 and the guide rod 2 722 are rotatably connected to the ball 9. When the guide rod 1 712 moves along the wall, the ball 9 rolls on the wall, allowing the staff to control the movement of the spray gun 2 more smoothly when spraying other positions on the curved wall, and flexibly adapt to curved walls such as domes and spiral staircases.

[0074] It should be noted that, in this document, relational terms such as first and second, etc., are used only 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 "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0075] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A building wall spraying device, comprising: A booster pump and a spray gun, wherein a feed pipe is connected between the spray gun and the booster pump; The invention is characterized in that: it further comprises a fixed extension rod, wherein the fixed extension rod is threadedly connected to the nozzle of the spray gun; A movable extension rod, the movable extension rod being rotatably and sealingly connected to the end of the fixed extension rod, and a hose section being provided in the middle of the movable extension rod; A limiting mechanism, the limiting mechanism being located outside the connection between the movable extension rod and the fixed extension rod, and the limiting mechanism limiting the movable extension rod from freely rotating on the surface of the fixed extension rod; A guide mechanism, the guide mechanism being located outside the movable extension rod and adjusting the inclination angle of the end of the movable extension rod according to the curvature of the spraying surface; an expansion mechanism connected to the guide mechanism, wherein the greater the inclination amplitude of the movable extension rod, the greater the curvature of the hose segment synchronously adjusted by the expansion mechanism; The guide mechanism includes a support frame fixed to the surface of the movable extension rod, a shaft rod fixedly connected to the outer side of the end of the movable extension rod, a fixing frame provided on the outer side of the shaft rod, the shaft rod being rotatably connected to the inner wall of the fixing frame, an adjusting member for pushing the nozzle at the end of the movable extension rod to move, and a detection member for controlling the distance the adjusting member pushes the movable extension rod is provided on the outer side of the fixing frame; The detection component includes a fixed cylinder 1 and a fixed cylinder 2 located outside the fixed frame, the fixed cylinder 1 and the fixed cylinder 2 are respectively fixed to the surface of the fixed frame, and the fixed cylinder 1 and the fixed cylinder 2 are symmetrically distributed on both sides of the fixed frame, the top of the fixed cylinder 1 is fixedly connected to an adjustment seat, the adjustment seat is fixed to the support frame, and the expansion mechanism is connected to the adjustment seat; The expansion mechanism includes an expansion block that is slidably connected to the inner wall of the adjustment seat, the expansion block is fixedly connected to a piston plate 2 near one end of the adjustment seat, an air guide hole is provided on the inner wall of the adjustment seat, the piston plate 2 is slidably and sealedly connected to the inner wall of the air guide hole, the air guide hole is communicated with a fixed cylinder 1, a return spring is fixedly connected to the outer side of the piston plate 2, the return spring is fixed to the inner wall of the air guide hole at one end away from the piston plate 2, a placement cavity is provided on the inner wall of the expansion block, and an expansion component is provided on the inner wall of the placement cavity, and the expansion component adjusts the expansion amplitude according to the moving distance of the guide rod 1 and the guide rod 2.

2. The building wall spraying equipment according to claim 1 is characterized in that: The limiting mechanism includes an adjusting handle fixedly connected to the outside of the movable extension rod, the adjusting handle is rotatably connected to the outside of the fixed extension rod, the adjusting handle is slidingly connected to a plurality of limiting beads near the inner wall of one end of the fixed extension rod, a spring sheet is fixedly connected to the outside of the limiting bead, and the spring sheet is fixed to the inner wall of the adjusting handle at one end away from the limiting bead, and a plurality of limiting grooves that are engaged with the limiting beads are provided on the surface of the fixed extension rod, and the plurality of limiting grooves are evenly spaced on the surface of the fixed extension rod.

3. The building wall spraying equipment according to claim 1 is characterized in that: The adjusting part includes an electric telescopic rod mounted on the surface of a fixing frame, a button battery pack is mounted on the surface of the fixing frame, the button battery pack is connected to the electric telescopic rod, a slider is fixedly connected to the output end of the electric telescopic rod, and a sliding groove is provided on the surface of the movable extension rod to be slidably connected to the slider.

4. The building wall spraying equipment according to claim 1 is characterized in that: The inner wall of the fixed cylinder is slidably connected to a guide rod, the top of the guide rod is fixedly connected to a piston plate, the piston plate is slidably and sealedly connected to the inner wall of the fixed cylinder, the top of the piston plate is fixedly connected to a compression spring, the compression spring is fixed to the inner wall of the fixed cylinder, a sliding rheostat is installed on the inner wall of the fixed cylinder, the sliding rheostat is externally provided with a current sensor, the sliding rheostat includes a resistor and a slider, an insulating sheet is fixed to the outside of the slider, the insulating sheet is fixed to the guide rod, the sliding rheostat is connected to the outside of a voltage sensor, a controller is installed on the surface of the support frame, and the controller is connected to the voltage sensor.

5. The building wall spraying equipment according to claim 4 is characterized in that: The inner wall of the second fixed cylinder is slidably connected to a second guide rod, the top of the second guide rod is fixedly connected to a second compression spring, the second compression spring is fixed to the inner wall of the second fixed cylinder, the inner wall of the second fixed cylinder is installed with a second sliding rheostat, the second sliding rheostat includes a second resistor body and a second slider, the outer side of the second slider is fixedly connected to a second insulating sheet, the second insulating sheet is fixed to the second guide rod, the outer side of the second sliding rheostat is connected to a second voltage sensor, and the second voltage sensor is connected to a controller.

6. The building wall spraying equipment according to claim 1, characterized in that: The cam is provided with two cams, and one end of the cams is connected to the inner wall of the placement chamber, and a rotating rod is provided between the two cams, and the rotating rod is rotatably connected to the inner wall of the placement chamber. A winding wheel is fixedly connected to the outer side of the rotating rod, and a pull rope is wrapped around the outer side of the winding wheel. The inner wall of the placement chamber is fixedly connected to a fixing box, and an iron sheet is slidably connected to the inner wall of the fixing box, and the iron sheet is fixed to the pull rope. An electromagnet is installed on the inner wall of the fixing box, and the position of the electromagnet corresponds to the iron sheet. The sliding rheostat 1 and the sliding rheostat 2 are connected in series in the circuit where the electromagnet is located. A vortex spring is fixedly connected to the outer side of one end of the rotating rod, and the vortex spring is installed on the inner wall of the expansion block. The two ends of the rotating rod are respectively fixedly connected with a transmission gear 1, one of the transmission gear 1 is meshed with a transmission gear 2 on the top, and a transmission gear 3 is meshed with the other transmission gear 1 on the bottom. The transmission gear 2 and the transmission gear 3 are respectively rotatably connected to the inner wall of the placement cavity, and the outer side of the transmission gear 2 is meshed with a transmission tooth plate 1, and the transmission tooth plate 1 is slidably connected to the inner wall of the placement cavity. The transmission tooth plate 1 is rotatably connected to a sliding seat 1 above, and the sliding seat 1 is slidably connected to the inner wall of the expansion plate located above, and the transmission gear 3 is meshed with a transmission tooth plate 2 on the outer side, and the transmission tooth plate 2 is slidably connected to the inner wall of the placement cavity. The transmission tooth plate 2 is rotatably connected to the bottom with a sliding seat 2, and the sliding seat 2 is slidably connected to the inner wall of the expansion plate located below.

7. The building wall spraying equipment according to claim 5, characterized in that: The bottoms of the guide rod 1 and the guide rod 2 are rotatably connected with balls.

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