Efficient electric box surface spraying equipment

Abstract

The utility model discloses efficient electric box surface spraying equipment which comprises a spraying mechanism, the spraying mechanism comprises a spraying gun, a spraying head, an adjusting mechanism, a conveying pipe and an external pipe, and the spraying head is connected to the top end of the spraying gun; the adjusting mechanism comprises a connecting pipe, an adjusting sleeve, an outer sleeve, a linkage sleeve, a center rod, a matching sleeve, a matching block, a control sleeve, a sealing sleeve, a through hole, a spiral groove and a positioning mechanism, the connecting pipe is fixed to the feeding end of the spray gun, when the coating flow needs to be adjusted, the adjusting sleeve is rotated to drive the linkage sleeve to enable the center rod to rotate, and the center rod rotates to drive the matching sleeve to rotate; and the matching block on the matching sleeve forms screw-thread matching movement in the spiral groove, so that the matching sleeve drives the control sleeve to generate accurate axial displacement relative to the sealing sleeve, thereby changing the plugging area of the sealing sleeve on the through hole and realizing accurate control on a coating flowing gap.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment manufacturing technology, and more specifically, it relates to a high-efficiency electrical box surface spraying equipment. Background Technology

[0002] In the field of electrical equipment manufacturing, the quality of the protective coating on the surface of electrical boxes is directly related to the weather resistance, insulation performance and service life of the products, and puts forward strict requirements for the production process. Modern electrical box manufacturers need efficient, uniform and precise coating processes to ensure that the coating thickness on the product surface is consistent, the appearance is smooth and flat, and at the same time meets various protection level standards. However, the electrical box surface spraying equipment commonly used in the industry at present has obvious shortcomings, especially in the lack of an effective mechanism for precise control of paint spraying flow. Traditional spraying systems mostly use simple pressure regulation or mechanical valve control, which makes it difficult to achieve precise flow management for different specifications of electrical boxes and various paint characteristics. This leads to problems such as uneven coating thickness, insufficient coverage of corners or corners, or material waste caused by over-spraying, which seriously affects the consistency of product quality and production efficiency.

[0003] On mass production lines for electrical boxes, operators often need to frequently adjust spraying parameters according to different box models, materials, and coating types to adapt to changing production demands. Existing equipment often requires repeated trial spraying and manual fine-tuning during parameter switching, which not only prolongs production preparation time but also increases reliance on the technical experience of operators. At the same time, due to the lack of a precise flow monitoring and feedback system, real-time adjustments during the spraying process are almost impossible, resulting in low coating efficiency and environmental pollution. Especially when dealing with complex-shaped electrical boxes or applying special functional coatings, the adjustment mechanism of existing equipment is particularly crude and cannot meet the refined requirements of high-quality coating. This not only increases the product defect rate and rework costs but also hinders the pace of intelligent and lean development in the electrical box manufacturing industry. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the problems existing in the prior art, this utility model provides a high-efficiency electrical box surface spraying equipment to solve the technical problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency electrical box surface spraying device, comprising a spraying mechanism, wherein the spraying mechanism includes a spray gun, a nozzle, an adjusting mechanism, a conveying pipe, and an outer connecting pipe. The nozzle is connected to the top of the spray gun. The adjusting mechanism includes a connecting pipe, an adjusting sleeve, an outer sleeve, a linkage sleeve, a central rod, a mating sleeve, a mating block, a control sleeve, a sealing sleeve, a through hole, a spiral groove, and a positioning mechanism. The connecting pipe is fixed to the feed end of the spray gun. The adjusting sleeve is rotatably installed at the bottom end of the connecting pipe. The outer sleeve is rotatably connected to the bottom end of the adjusting sleeve. The linkage sleeve is fixed inside the adjusting sleeve. The central rod slides inside the linkage sleeve. The mating sleeve is fixed at the bottom end of the central rod. Multiple sets of mating blocks are provided on the outer wall of the mating sleeve. The control sleeve is fixed on the bottom surface of the mating sleeve. The sealing sleeve is fixed inside the outer sleeve and slidably connected to the control sleeve. Multiple sets of through holes are provided on the outer wall of the control sleeve. The spiral groove is provided on the inner wall of the outer sleeve and slidably connected to multiple sets of mating blocks. The conveying pipe is fixed at the bottom end of the outer sleeve. The outer connecting pipe is fixed at the bottom end of the conveying pipe.

[0008] The present invention is further configured such that the central rod is a polygonal shape and slidably connected to the inner side of the linkage sleeve. This polygonal central rod and the inner side of the linkage sleeve form a matching sliding connection, ensuring efficient transmission of rotational force, preventing slippage, and simultaneously restricting the central rod to slide only along the axial direction without rotating on its own, thus improving the accuracy and stability of the entire adjustment mechanism.

[0009] This invention is further configured such that multiple sets of mating sleeves have mounting grooves on their outer walls, and multiple sets of mounting grooves are provided with compression springs connected to their inner walls. The tops of the multiple sets of compression springs are respectively connected to multiple sets of mating blocks. The design of the compression springs and mounting grooves provides elastic support for the mating blocks, enabling them to maintain close contact with the spiral groove while having a certain buffering capacity, reducing wear and impact during movement, extending the service life of the components, and ensuring a smoother and more reliable adjustment process.

[0010] This invention is further configured such that all sets of mating blocks are spherical and slide within the spiral groove to form a threaded fit. The spherical mating block design increases the contact area with the spiral groove, reduces local stress concentration, and allows the spherical structure to roll rather than slide within the spiral groove, effectively reducing frictional resistance, improving adjustment sensitivity and operating feel, and making flow regulation smoother and more precise.

[0011] The present invention is further provided with a connecting spring connecting the bottom surface of the mating sleeve and the inner wall of the outer sleeve. The connecting spring provides a return force after the mating sleeve moves, ensuring that the mating sleeve can be stably positioned in a preset position when no external force is applied, preventing positional deviation caused by vibration or other interference. At the same time, it provides appropriate damping during operation, making the adjustment process more controllable.

[0012] This invention is further configured such that the positioning mechanism includes a separator block, a fixing ring, a slide bar, a positioning block, a telescopic spring, and a limiting sleeve. Multiple sets of separator blocks are distributed on the outer wall of the outer sleeve. The fixing ring is fixed to the bottom surface of the adjusting sleeve. Multiple sets of slide bars are distributed on the bottom surface of the fixing ring. The positioning block slides on the outer wall of the multiple sets of slide bars. Multiple sets of telescopic springs are provided and connected to the multiple sets of positioning blocks. The limiting sleeve slides on the outer wall of the outer sleeve and abuts against the outer wall of the multiple sets of positioning blocks. The positioning mechanism achieves precise positioning of the adjustable position through the coordinated work of multiple components. The sliding cooperation of the positioning block on the slide bar and the elastic support of the telescopic spring ensure that the positioning process is both accurate and has a buffering characteristic. The separator block provides a clear reference point for the gear position, enabling the operator to quickly and accurately position the preset flow rate level.

[0013] This invention is further configured such that each of the multiple sets of positioning blocks has a movable groove on its inner side, and a limiting ring is fixedly provided on the outer wall of the outer sleeve. The multiple sets of positioning blocks are slidably connected to the limiting ring via sliding grooves. This sliding connection design between the movable grooves and the limiting rings ensures that the positioning blocks can only move along a predetermined trajectory, preventing deviation and shaking, thus enhancing the stability and accuracy of the positioning system. It also reasonably limits the movement range of the positioning blocks, avoiding damage to the mechanism caused by excessive extension or compression.

[0014] The present invention is further configured such that a push spring is provided between the bottom surface of the limiting sleeve and the outer sleeve, and multiple sets of push springs are provided. The multiple sets of push springs provide a uniform thrust between the limiting sleeve and the outer sleeve, so that the limiting sleeve can stably abut against the outer wall of the positioning block, ensuring the consistency and reliability of the positioning action. At the same time, the design of the push springs also provides the operator with appropriate tactile feedback, making the adjustment operation more intuitive.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a high-efficiency electrical box surface spraying device, which has the following beneficial effects:

[0017] 1. The spraying mechanism forms a complete paint delivery system through spray guns, nozzles, delivery pipes, and external connecting pipes. This solves the problem of low efficiency in the construction of protective layers on the surface of electrical boxes using traditional spraying equipment. The mechanism connects the external connecting pipe to an external high-pressure pump paint delivery device. The paint is transported to the spray gun through the delivery pipe and finally sprayed evenly through a specially designed nozzle, achieving efficient coverage of the electrical box surface. This ensures uniform coating thickness and a smooth appearance, while improving construction efficiency and paint utilization, effectively meeting the stringent requirements for high-quality surface treatment in electrical equipment manufacturing.

[0018] 2. The adjustment mechanism adopts a combination design of connecting pipe, adjustment sleeve, outer sleeve, linkage sleeve, central rod, mating sleeve, mating block, control sleeve, sealing sleeve, through hole, and spiral groove. It innovatively solves the problem of difficulty in accurately adjusting the paint flow rate in traditional technology. When the paint flow rate needs to be adjusted, rotating the adjustment sleeve drives the linkage sleeve to rotate the central rod. The rotation of the central rod drives the mating sleeve to rotate. The mating block on the mating sleeve forms a threaded engagement movement in the spiral groove, causing the mating sleeve to drive the control sleeve to produce a precise axial displacement relative to the sealing sleeve. This changes the sealing area of ​​the sealing sleeve on the through hole, thereby achieving precise control of the paint flow gap. At the same time, the mating block is designed as a sphere and connected to the mounting groove through a compression spring, which enhances the stability of the movement. The connecting spring between the bottom surface of the mating sleeve and the outer sleeve provides a return function, ensuring the accuracy and repeatability of the adjustment process, and greatly improving the efficiency of paint use and the consistency of coating quality.

[0019] 3. The positioning mechanism, through the precise coordination of the separator block, fixing ring, slide bar, positioning block, telescopic spring, and limiting sleeve, provides a reliable positioning function for the adjustment mechanism. When the adjusting sleeve rotates to the predetermined position, multiple sets of push springs push the limiting sleeve against the outer wall of the positioning block, causing the positioning block to slide along the slide bar and limiting ring and compress the telescopic spring. When the positioning block abuts against the outer wall of the separator block, the entire adjustment system is fixed in a precise preset position. The movable groove on the inner side of the positioning block forms a sliding connection with the limiting ring on the outer sleeve, further ensuring precise guidance during the positioning process. The design of multiple positioning structures allows the equipment to quickly switch between multiple preset flow levels, greatly improving the adjustment efficiency between different specifications of electrical boxes or different coating types. This enables operators to quickly and accurately set parameters according to production needs, reducing debugging time and reliance on operational experience, and providing technical support for the automated and standardized production of electrical box surface treatment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency electrical box surface spraying device according to the present invention;

[0021] Figure 2 This is a schematic diagram of the spray gun structure in this utility model;

[0022] Figure 3 This is a schematic diagram of the adjustment mechanism in this utility model;

[0023] Figure 4 This is a cross-sectional view of the positioning mechanism in this utility model.

[0024] Figure 5 This is a cross-sectional view of the mating sleeve in this utility model.

[0025] In the diagram: 1. Spray gun; 2. Nozzle; 3. Delivery pipe; 4. Outer pipe; 5. Connecting pipe; 6. Adjusting sleeve; 7. Outer sleeve; 8. Linkage sleeve; 9. Center rod; 10. Mating sleeve; 11. Mating block; 12. Control sleeve; 13. Sealing sleeve; 14. Through hole; 15. Spiral groove; 16. Mounting groove; 17. Compression spring; 18. Connecting spring; 19. Separator block; 20. Fixing ring; 21. Sliding bar; 22. Positioning block; 23. Telescopic spring; 24. Limiting sleeve; 25. Movable groove; 26. Restricting ring; 27. Push spring. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Please see Figures 1-5 A high-efficiency electrical box surface spraying device includes a spraying mechanism, which comprises a spray gun 1, a nozzle 2, an adjusting mechanism, a conveying pipe 3, and an external connecting pipe 4. The nozzle 2 is connected to the top of the spray gun 1. The adjusting mechanism includes a connecting pipe 5, an adjusting sleeve 6, an external sleeve 7, a linkage sleeve 8, a center rod 9, a mating sleeve 10, a mating block 11, a control sleeve 12, a sealing sleeve 13, a through hole 14, a spiral groove 15, and a positioning mechanism. The connecting pipe 5 is fixed to the feed end of the spray gun 1. The adjusting sleeve 6 is rotatably mounted on the bottom end of the connecting pipe 5. The external sleeve 7 is rotatably connected to the bottom end of the adjusting sleeve 6. The moving sleeve 8 is fixed inside the adjusting sleeve 6, the central rod 9 slides inside the linkage sleeve 8, the mating sleeve 10 is fixed at the bottom of the central rod 9, the mating blocks 11 are provided in multiple sets distributed on the outer wall of the mating sleeve 10, the control sleeve 12 is fixed on the bottom surface of the mating sleeve 10, the sealing sleeve 13 is fixed inside the outer sleeve 7 and slidably connected to the control sleeve 12, the through holes 14 are provided in multiple sets distributed on the outer wall of the control sleeve 12, the spiral groove 15 is provided on the inner wall of the outer sleeve 7 and slidably connected to multiple sets of mating blocks 11, the conveying pipe 3 is fixed at the bottom of the outer sleeve 7, and the outer pipe 4 is fixed at the bottom of the conveying pipe 3.

[0030] The center rod 9 is set as a polygon and slides in the inner side of the linkage sleeve 8. The polygonal center rod 9 and the inner side of the linkage sleeve 8 form a shape-matching sliding fit. When the adjusting sleeve 6 rotates and drives the linkage sleeve 8 to rotate, the rotational force can be accurately transmitted to the center rod 9. At the same time, the center rod 9 is restricted to move only along the axis and will not rotate on its own, ensuring the accuracy and stability of the movement.

[0031] The outer wall of the multiple sets of mating sleeves 10 is provided with mounting grooves 16. The mounting grooves 16 are provided with multiple sets and the inner wall is connected with compression springs 17. The top of the multiple sets of compression springs 17 are respectively connected to multiple sets of mating blocks 11. The compression springs 17 provide elastic support for the mating blocks 11, so that the mating blocks 11 can always maintain close contact with the spiral groove 15. At the same time, they have appropriate elastic buffering performance to reduce the impact and wear during the movement process and ensure that the mating blocks 11 move smoothly and reliably in the spiral groove 15.

[0032] Multiple sets of mating blocks 11 are all spherical and slide in the spiral groove 15 to form a threaded fit. The spherical mating blocks 11 form point contact in the spiral groove 15, which reduces frictional resistance and increases the contact area to disperse stress. When the mating sleeve 10 rotates with the central rod 9, the mating blocks 11 move along the spiral trajectory of the spiral groove 15, converting the rotational motion into the axial movement of the mating sleeve 10, thereby achieving precise displacement control.

[0033] A connecting spring 18 is provided between the bottom surface of the mating sleeve 10 and the inner wall of the outer sleeve 7. The connecting spring 18 provides a return spring force to ensure that the mating sleeve 10 remains in the preset position when there is no external force, preventing position displacement caused by equipment vibration. At the same time, it provides appropriate damping for adjustment operation, making the adjustment process smoother and more controllable.

[0034] The positioning mechanism includes a separator 19, a fixing ring 20, a slide bar 21, a positioning block 22, a telescopic spring 23, and a limiting sleeve 24. Multiple sets of separator blocks 19 are distributed on the outer wall of the outer sleeve 7. The fixing ring 20 is fixed to the bottom surface of the adjusting sleeve 6. Multiple sets of slide bars 21 are distributed on the bottom surface of the fixing ring 20. The positioning block 22 slides on the outer wall of the multiple sets of slide bars 21. Multiple sets of telescopic springs 23 are provided and connected to the multiple sets of positioning blocks 22 respectively. The limiting sleeve 24 slides on the outer wall of the outer sleeve 7 and abuts against the outer wall of the multiple sets of positioning blocks 22. When the adjusting sleeve 6 rotates to a preset position, the limiting sleeve 24, under the action of the push spring 27, pushes the positioning block 22 to slide along the slide bar 21. When the positioning block 22 contacts the separator block 19, a physical block is formed, achieving precise positioning of the adjusting sleeve 6. The design of multiple sets of positioning blocks 22 and separator blocks 19 allows the device to have multiple preset positions.

[0035] Multiple positioning blocks 22 are provided with movable grooves 25 on their inner sides, and a limiting ring 26 is fixed on the outer wall of the outer sleeve 7. Multiple positioning blocks 22 are slidably connected to the limiting ring 26 through sliding grooves. The movable grooves 25 and the limiting ring 26 form a guide sliding mechanism to ensure that the positioning blocks 22 can only move in the radial direction, preventing deviation and shaking, and improving positioning accuracy and stability. At the same time, the limiting ring 26 also limits the range of motion of the positioning blocks 22 to prevent them from detaching from the slide bar 21 or overstretching.

[0036] A push spring 27 is provided between the bottom surface of the limiting sleeve 24 and the outer sleeve 7. Multiple sets of push springs 27 are provided to provide a uniform axial thrust to the limiting sleeve 24, so that the limiting sleeve 24 can stably abut against the outside of the positioning block 22. When the adjusting sleeve 6 rotates, the limiting sleeve 24 needs to overcome the elastic force of the push spring 27 to move axially along the outer sleeve 7. This design provides clear tactile feedback to the operator and ensures the reliability of the positioning system.

[0037] In this embodiment, the external pipe 4 is connected to an external high-pressure pump coating delivery device, and the coating is delivered through the delivery pipe 3. Then, the coating is sprayed onto the surface of the meter box through the spray gun 1 and the nozzle 2. When it is necessary to adjust the flow rate of the coating, the rotating adjustment sleeve 6 drives the central rod 9 to rotate through the linkage sleeve 8. The central rod 9 drives the mating sleeve 10 to rotate. The mating sleeve 10 forms a threaded fit along the spiral groove 15 through multiple sets of mating blocks 11. The mating sleeve 10 drives the control sleeve 12 to slide along the sealing sleeve 13, thereby changing the sealing area of ​​the sealing sleeve 13 on the multiple sets of through holes 14. By changing the sealing area of ​​the sealing sleeve 13 on the through holes 14, the flow gap of the coating is adjusted, thereby adjusting the flow rate of the coating.

[0038] More specifically, the limiting sleeve 24 is then pushed against the outer wall of the multiple positioning blocks 22 by multiple sets of push springs 27, so that the multiple positioning blocks 22 slide along the slide bar 21 and the limiting ring 26 respectively and squeeze the telescopic spring 23. Then, the multiple positioning blocks 22 abut against the outer wall of the multiple sets of partition blocks 19 respectively to position and fix the adjusting sleeve 6.

[0039] In summary, during use or operation of the overall equipment: the external pipe 4 is connected to the external high-pressure pump paint delivery device, and the paint is delivered through the delivery pipe 3. Then, the paint is sprayed onto the surface of the meter box through the spray gun 1 and the nozzle 2. When it is necessary to adjust the paint flow rate, the rotating adjustment sleeve 6 drives the central rod 9 to rotate through the linkage sleeve 8. The central rod 9 drives the mating sleeve 10 to rotate. The mating sleeve 10 forms a threaded fit along the spiral groove 15 through multiple sets of mating blocks 11. The mating sleeve 10 drives the control sleeve 12 to slide along the sealing sleeve 13, thereby changing the sealing area of ​​the sealing sleeve 13 on the multiple sets of through holes 14. By changing the sealing area of ​​the sealing sleeve 13 on the through holes 14, the flow gap of the paint is adjusted, thereby adjusting the paint flow rate.

[0040] Subsequently, multiple sets of push springs 27 push the limiting sleeve 24 to abut against the outer wall of multiple sets of positioning blocks 22, so that the multiple sets of positioning blocks 22 slide along the slide bar 21 and the limiting ring 26 respectively and squeeze the telescopic spring 23. Then, the multiple sets of positioning blocks 22 abut against the outer wall of multiple sets of partition blocks 19 respectively to position and fix the adjusting sleeve 6.

[0041] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency electrical box surface spraying device, comprising a spraying mechanism, characterized in that: The spraying mechanism includes a spray gun (1), a nozzle (2), an adjustment mechanism, a delivery pipe (3), and an outer pipe (4). The nozzle (2) is connected to the top of the spray gun (1). The adjustment mechanism includes a connecting pipe (5), an adjustment sleeve (6), an outer sleeve (7), a linkage sleeve (8), a center rod (9), a mating sleeve (10), a mating block (11), a control sleeve (12), a sealing sleeve (13), a through hole (14), a spiral groove (15), and a positioning mechanism. The connecting pipe (5) is fixed to the feed end of the spray gun (1). The adjustment sleeve (6) is rotatably installed at the bottom end of the connecting pipe (5). The outer sleeve (7) is rotatably connected to the bottom end of the adjustment sleeve (6). The linkage sleeve (8) is fixed. Inside the adjusting sleeve (6), the center rod (9) slides inside the linkage sleeve (8), the mating sleeve (10) is fixed at the bottom of the center rod (9), the mating block (11) is provided in multiple sets distributed on the outer wall of the mating sleeve (10), the control sleeve (12) is fixed on the bottom surface of the mating sleeve (10), the sealing sleeve (13) is fixed inside the outer sleeve (7) and slidably connected to the control sleeve (12), the through hole (14) is provided in multiple sets distributed on the outer wall of the control sleeve (12), the spiral groove (15) is provided on the inner wall of the outer sleeve (7) and slidably connected to multiple sets of mating blocks (11), the conveying pipe (3) is fixed at the bottom of the outer sleeve (7), and the outer pipe (4) is fixed at the bottom of the conveying pipe (3).

2. The high-efficiency electrical box surface spraying equipment according to claim 1, characterized in that: The central rod (9) is configured as a polygon and is slidably connected to the inner side of the linkage sleeve (8).

3. The high-efficiency electrical box surface spraying equipment according to claim 2, characterized in that: multiple sets The outer wall of the fitting sleeve (10) is provided with an installation groove (16), and the installation groove (16) is provided with multiple sets and the inner wall is connected with a compression spring (17). The top of the multiple sets of compression springs (17) are respectively connected to multiple sets of fitting blocks (11).

4. The high-efficiency electrical box surface spraying equipment according to claim 3, characterized in that: multiple sets The mating blocks (11) are all spherical and slide in the spiral grooves (15) to form a threaded fit.

5. The high-efficiency electrical box surface spraying equipment according to claim 4, characterized in that: A connecting spring (18) is provided between the bottom surface of the mating sleeve (10) and the inner wall of the outer sleeve (7).

6. The high-efficiency electrical box surface spraying equipment according to claim 5, characterized in that: The positioning mechanism includes a partition block (19), a fixing ring (20), a slide bar (21), a positioning block (22), a telescopic spring (23), and a limiting sleeve (24). The partition block (19) is provided in multiple sets distributed on the outer wall of the outer sleeve (7). The fixing ring (20) is fixed on the bottom surface of the adjusting sleeve (6). The slide bar (21) is provided in multiple sets distributed on the bottom surface of the fixing ring (20). The positioning block (22) slides on the outer wall of the multiple sets of slide bars (21). The telescopic spring (23) is provided in multiple sets and is respectively connected to the multiple sets of positioning blocks (22). The limiting sleeve (24) slides on the outer wall of the outer sleeve (7) and abuts against the outer wall of the multiple sets of positioning blocks (22).

7. The high-efficiency electrical box surface spraying equipment according to claim 6, characterized in that: Each of the multiple positioning blocks (22) has an active groove (25) on its inner side, and a limiting ring (26) is fixedly provided on the outer wall of the outer sleeve (7). The multiple positioning blocks (22) are slidably connected to the limiting ring (26) through the sliding groove.

8. The high-efficiency electrical box surface spraying equipment according to claim 7, characterized in that: A push spring (27) is provided between the bottom surface of the limiting sleeve (24) and the outer sleeve (7), and multiple sets of push springs (27) are provided.

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