Surface spraying device for road construction

Abstract

The present invention discloses a surface spraying device for road construction, which belongs to the technical field of spraying devices. The surface spraying device for road construction has a spray box for containing spray paint, and the spray box includes a box body with an opening at one end, a feed pipe, a discharge pipe, a sealing plate dynamically sealed with the inner side wall of the box body opening end, a rotating rod with a dynamic seal installed on the sealing plate and rotatable relative to the box body, and a stirring rod assembly that can be extended and retracted along the height direction of the box body; a containing chamber for containing the spray paint is formed between the inner side wall of the box body and the sealing plate; the feed pipe and the discharge pipe are both connected to the box body and communicated with the containing chamber. When the present invention extracts the spray paint or adds the spray paint into the spray box, as the space of the containing chamber becomes larger and smaller, the rotating rod rotates continuously, and drives the stirring rod assembly to stir the spray paint in the containing chamber, so that the sprayed material is more uniform during the road spraying process.

Description

Technical Field

[0001] The present invention relates to the technical field of spraying devices, and more particularly to a surface spraying device for road construction. Background Art

[0002] In recent years, my country's economy has developed rapidly, and the construction of expressways and roads at all levels has been continuously developed. Highway markings are the basic condition for ensuring vehicle safety. There are a large number of new roads that need new markings and old markings that need to be redrawn.

[0003] At present, in the market, during the road construction process, a marking device is usually used to mark the road. When the existing road construction marking device is used, the marking device is usually loaded on a frame, and the spraying parts on the marking device are moved by the vehicle, and the spraying parts are connected to the discharge port of the spray box. However, the existing spray box is currently only a container for storing spray paint. The existing spray box cannot stir the spray paint in the spray box during the process of extracting the spray paint, so that the sprayed spray paint is not uniform enough, which affects the marking effect. For this reason, a surface spraying device for road construction is proposed. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a surface spraying device for road construction. The surface spraying device for road construction provided by the present invention has a spray box on which, when extracting spray paint or adding spray paint into the spray box, as the space of the containing chamber expands and shrinks, the rotating rod continuously rotates and drives the stirring rod assembly to stir the spray paint in the containing chamber, so that in the process of road spraying, the sprayed material is more uniform, and further, the road surface spraying is high in quality.

[0006] 2. Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A surface spraying device for road construction, the surface spraying device for road construction having a spray box for accommodating spray paint, the spray box comprising a box body with an opening at one end, a feed pipe, a discharge pipe, a sealing plate dynamically sealed with the inner side wall of the box body open end, a rotating rod on which the dynamic seal is mounted on the sealing plate and can rotate relative to the box body, and a stirring rod assembly that can be extended and retracted along the height direction of the box body; a accommodating chamber for accommodating spray paint is formed between the inner side wall of the box body and the sealing plate; the feed pipe and the discharge pipe are both connected to the box body and communicated with the accommodating chamber; end a of the rotating rod is located in the accommodating chamber and connected to one end of the stirring rod assembly, and end b is located on the other side of the sealing plate away from the accommodating chamber An internal thread groove is provided on the outer surface of the b end of the rotating rod and along the length direction of the rotating rod, and a first limiting portion that can extend into the internal thread groove is fixedly installed on the other side of the sealing plate away from the accommodating chamber; when the spray paint in the accommodating chamber is extracted through the discharge pipe, the feed pipe is in a sealed state, and as the spray paint in the accommodating chamber gradually becomes less, the sealing plate moves up, and the first limiting portion cooperates with the internal thread groove, so that the rotating rod drives the stirring rod assembly to stir the spray paint in the accommodating chamber; when the spray paint is added to the accommodating chamber through the feed pipe, the sealing plate moves down, and the first limiting portion cooperates with the internal thread groove, so that the rotating rod drives the stirring rod assembly to stir the spray paint in the accommodating chamber.

[0009] Furthermore, the stirring rod assembly includes a plurality of stirring rods connected in sequence; the ends of adjacent stirring rods are rotationally connected, and the angle between adjacent stirring rods is an acute angle; a torsion spring is arranged between adjacent stirring rods, and the torsion spring is located at the connection between adjacent stirring rods.

[0010] Furthermore, a movable through groove is provided on the side wall of the stirring rod connected to the end a of the rotating rod on the stirring rod assembly; a U-shaped groove is provided on the top of the end a of the rotating rod, and a guide rod passing through the movable through groove is installed between the two inner side walls of the U-shaped groove.

[0011] Furthermore, the first limiting portion includes a mounting rod and a limiting block; the mounting rod is connected to the limiting block, and one end of the limiting block away from the mounting rod extends into the internal thread groove on the rotating rod.

[0012] Furthermore, a fixing plate is installed in the box body; the fixing plate is located on the other side of the sealing plate away from the accommodating chamber.

[0013] Furthermore, a second through hole is opened on the sealing plate through which the b end of the rotating rod passes; the first limiting part is a limiting ball, which is fixedly installed on the inner wall of the second through hole, and one end of the limiting ball away from the inner wall of the second through hole extends into the internal thread groove on the rotating rod.

[0014] Furthermore, a telescopic device that can be telescoped only along the distance direction between the fixed plate and the sealing plate is fixedly arranged between the fixed plate and the sealing plate; there are multiple first limiting parts; the telescopic device includes a plurality of connecting rods that are sleeved with increasing diameters from the inside to the outside, and the adjacent connecting rods are the first connecting rod and the second connecting rod; the first connecting rod is located on the inner side of the second connecting rod; a first through hole that matches the first connecting rod and is passed through by the first connecting rod is provided on the top of the second connecting rod; a rectangular groove is provided on the inner wall of the first through hole, and a slider that moves along the length direction of the rectangular groove is fixedly connected to the outer wall of the first connecting rod; the top end of the connecting rod located in the innermost layer is fixed to the sealing plate, and the first fixing rod is fixedly arranged on the outer wall of the connecting rod located in the innermost layer; multiple first limiting parts are respectively connected to the connecting rods away from the innermost layer. The outer side walls of multiple connecting rods of the layer are fixed; the opposite side walls of two adjacent first limiting parts are respectively provided with first magnetic attraction parts and second magnetic attraction parts that are attracted to each other; the top end of the connecting rod adjacent to the innermost connecting rod is provided with a first placement groove matching the bottom end of the first fixed rod; the top ends of the third layer connecting rods from the inside to the outside and the other connecting rods from the third layer connecting rods to the outside are all provided with a second placement groove matching the bottom end of the first limiting part; the first fixed rod is provided with a third magnetic attraction part, and the first limiting part closest to the first fixed rod is provided with a fourth magnetic attraction part attracted to the third magnetic attraction part; the first limiting parts connected to the inner layer connecting rods can be inserted into the second placement groove opened at the top end of the outer layer connecting rod; the bottom end of the connecting rod located at the outermost layer is fixed to the fixed plate.

[0015] Furthermore, the angle between the length direction of the first limiting portion and the length direction of the rectangular groove is greater than.

[0016] Furthermore, the stirring rod assembly is compressed along the height direction of the box body, and when compressed to the limit, both ends of the stirring rod are in close contact with the side wall of the box body.

[0017] Furthermore, a spring is fixedly arranged between the fixing plate and the sealing plate.

[0018] Furthermore, the distance between the two inner side walls of the U-shaped groove is the same as the thickness of the stirring rod.

[0019] Furthermore, the feed pipe opening of the feed pipe connected to the accommodating chamber and the discharge pipe opening of the discharge pipe connected to the accommodating chamber are at the same height.

[0020] Furthermore, a spring is fixedly arranged between the fixing plate and the sealing plate.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] (1) The present invention arranges a sealing plate, a rotating rod, a stirring rod assembly, a first limiting portion, and an internal thread groove. When the sealing plate moves up and down along the height direction of the box body, the rotating rod cooperates with the first limiting portion to drive the rotating rod to rotate, so that the rotating rod drives the stirring rod assembly to stir the sprayed paint, so that during the process of road spraying, the sprayed material is more uniform, and further, the road surface is sprayed and painted with high quality.

[0024] (2) The present invention provides a telescopic device and a first magnetic attraction portion and a second magnetic attraction portion. When the sealing plate moves upward along the height direction of the box body, the multiple first limit portions are displaced relative to the rotating rod in turn along the height direction of the box body, so that when the sealing plate moves upward, the rotating rod and the first limit portions can cooperate to drive the rotating rod to rotate, so that the rotating rod drives the stirring rod assembly to stir the spray paint, thereby solving the problem of one end of the rotating rod being too long.

[0025] (3) The present invention fixes a spring between the fixed plate and the sealing plate to solve the problem that the sealing plate cannot move along the height direction of the box body when extracting the spray paint due to insufficient sealing of the accommodating chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of a three-dimensional structure from a first viewing angle of a first embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of a three-dimensional structure of the first embodiment of the present invention from a second viewing angle;

[0028] Figure 3 It is a partial cross-sectional three-dimensional structural schematic diagram of the first embodiment of the present invention;

[0029] Figure 4 A partial cross-sectional plan view of a first embodiment of the present invention;

[0030] Figure 5 For the present invention Figure 4 The structural diagram at A in the middle;

[0031] Figure 6 It is a three-dimensional structural schematic diagram of the stirring rod assembly, the sealing plate and the rotating rod of the present invention;

[0032] Figure 7 It is a structural schematic diagram of the sealing plate and the rotating rod of the present invention;

[0033] Figure 8 is a partial cross-sectional plan view of a second embodiment of the present invention;

[0034] Fig. 9 For the present invention Figure 8The structural diagram at B in the middle;

[0035] Fig.10 It is a schematic cross-sectional structure diagram of the sealing plate in the process of moving upwards in the second embodiment of the present invention;

[0036] Fig.11 is a schematic structural diagram of a telescopic device in a second embodiment of the present invention;

[0037] Fig.12 It is a schematic cross-sectional structure diagram of the telescopic device in the second embodiment of the present invention.

[0038] Description of the numbers in the figure:

[0039] 1 box, 1a containing chamber,

[0040] 2 feeding pipe, 3 discharging pipe, 4 sealing plate,

[0041] 5 rotating rod, 5a internal thread groove, 5c guide rod, 5d U-shaped groove,

[0042] 6 stirring rod assembly, 6a stirring rod, 6a1 moving slot,

[0043] 7 first limiting part, 701 mounting rod, 702 limiting block, 7-1 first magnetic attraction part, 7-2 second magnetic attraction part,

[0044] 8Fixed plate,

[0045] 9 telescopic device, 901 first connecting rod, 902 second connecting rod, 902a rectangular groove, 902b first through hole, 9-1 first fixing rod, 9-2 first placement groove, 9-3 second placement groove;

[0046] 10 restricted balls. DETAILED DESCRIPTION

[0047] Example 1: Please refer to Figure 1-7 A surface spraying device for road construction, the surface spraying device for road construction has a spray box for accommodating spray paint, the spray box includes a box body 1 with an opening at one end, a feed pipe 2, a discharge pipe 3, a sealing plate 4 dynamically sealed with the inner side wall of the open end of the box body 1, a rotating rod 5 dynamically installed on the sealing plate 4 and rotatable relative to the box body 1, and a stirring rod assembly 6 that can be extended and retracted along the height direction of the box body 1; a accommodating chamber 1a for accommodating spray paint is formed between the inner side wall of the box body 1 and the sealing plate 4.

[0048] The feed pipe 2 and the discharge pipe 3 are both connected to the box body 1 and communicate with the accommodating chamber 1a; the a end of the rotating rod 5a is located in the accommodating chamber 1a and is connected to one end of the stirring rod assembly 6, and the b end is located on the other side of the sealing plate 4 away from the accommodating chamber 1a, and an internal thread groove 5a is provided on the outer surface of the b end of the rotating rod 5 and along the length direction of the rotating rod 5, and a first limiting portion 7 that can extend into the internal thread groove 5a is fixedly installed on the other side of the sealing plate 4 away from the accommodating chamber 1a.

[0049] A sealing ring is provided on the outer sleeve of the sealing plate 4, and the sealing ring is located between the sealing plate 4 and the inner wall of the box body 1. A sealing baffle is provided on the outer sleeve of the rotating rod 5a end, and the sealing baffle is tightly attached to the sealing plate 4. A third through hole is opened on the sealing plate 4 for the rotating rod 5 to pass through, and a rolling bearing is installed on the rotating rod 5, and the rolling bearing is located between the rotating rod 5 and the sealing plate 4.

[0050] When adding the spray paint to the containing chamber 1a through the feed pipe 2, the discharge pipe 3 can be sealed, and the spray paint can be added from the feed pipe 2 to the containing chamber 1a by using a water pump.

[0051] When spray paint is added to the accommodating chamber 1a, as the amount of spray paint in the accommodating chamber 1a gradually increases and the gravity of the spray paint in the accommodating chamber 1a gradually increases, the spray paint pushes the lower sealing plate 4 to move downward along the height direction of the box body 1.

[0052] The stirring rod assembly 6 includes a plurality of stirring rods 6a connected in sequence; the ends of adjacent stirring rods 6a are rotatably connected by pins, and the angle between adjacent stirring rods 6a is an acute angle; a torsion spring is arranged between adjacent stirring rods 6a, and the torsion spring is located at the connection between adjacent stirring rods 6a. The torsion spring enables adjacent stirring rods 6a on the stirring rod assembly 6 to open, or gradually close, so that the stirring rod assembly can be extended and retracted along the height direction of the box body 1; when the sealing plate 4 gradually moves downward, the angle between adjacent stirring rods 6a is driven by the torsion spring, and the opening amplitude gradually increases; when the sealing plate 4 gradually moves downward, the torsion spring is compressed and deformed, and the angle between adjacent stirring rods 6a gradually decreases.

[0053] Furthermore, a movable through groove 6a1 is provided on the side wall of the stirring rod 6a connected to the end of the rotating rod 5a on the stirring rod assembly 6; a U-shaped groove 5d is provided on the top of the rotating rod 5a end, and a guide rod 5c passing through the movable through groove 6a1 is installed between the two inner walls of the U-shaped groove 5d. When the rotation speed of the rotating rod 5a changes, the guide rod 5c can move in the movable through groove 6a1. At this time, the stirring rod assembly 6 will swing to a certain extent, so that the spray paint in the accommodating chamber 1a can be more fully stirred.

[0054] Furthermore, a fixing plate 8 is installed in the box body 1; the fixing plate 8 is located on the other side of the sealing plate 4 away from the accommodating chamber 1a; and a second through hole is opened on the fixing plate 8 for the end of the rotating rod 5b to pass through.

[0055] Furthermore, the first limiting portion 7 is a limiting ball 10; the limiting ball 10 is fixedly mounted on the inner wall of the second through hole, and one end of the limiting ball 10 away from the inner wall of the second through hole extends into the internal thread groove 5a on the rotating rod 5, and is used to drive the rotating rod 5 to rotate when the rotating rod 5 moves up and down along the height direction of the box body 1 relative to the limiting ball 10.

[0056] Furthermore, the first limiting portion 7 may also be of the following structure; the first limiting portion 7 includes a mounting rod 701 and a limiting block 702; the mounting rod 701 is connected to the limiting block 702, and one end of the limiting block 702 away from the mounting rod 701 extends into the internal thread groove 5a on the rotating rod 5, and the rotating rod 5 moves relative to the limiting block 702 along the height direction of the box body 1, so that when the rotating rod 5 moves relative to the limiting block 702 along the height direction of the box body 1, the rotating rod 5 cooperates with the limiting block 702, so that the rotating rod 5 drives the stirring rod assembly 6 to rotate; one end of the first limiting portion 7 away from the limiting block 702 is fixedly installed at a position on the other side of the sealing plate 4 away from the accommodating chamber 1a.

[0057] Furthermore, the distance between the two inner walls of the U-shaped groove 5d is the same as the thickness of the stirring rod 6a, so that the stirring rod 6a can stir the material in the accommodating chamber 1a to the maximum extent; and increase the force application area of ​​the rotating rod 5 to drive the stirring rod assembly 6 to rotate.

[0058] Furthermore, the feed pipe opening of the feed pipe 2 communicating with the accommodating chamber 1a and the discharge pipe opening of the discharge pipe 3 communicating with the accommodating chamber 1a are at the same height.

[0059] When the spray paint in the accommodating chamber 1a is extracted through the discharge pipe 3, the feed pipe 2 is in a sealed state. At this time, the accommodating chamber 1a is a sealed accommodating chamber. As the spray paint in the accommodating chamber 1a gradually decreases, the pressure in the accommodating chamber 1a gradually becomes less than the external atmospheric pressure. The external atmospheric pressure pushes the sealing plate 4 upward, and pushes the sealing plate 4 to drive the rotating rod 5 to move upward relative to the first limiting portion 7. The first limiting portion 7 cooperates with the internal thread groove 5a, and the rotating rod 5 rotates. The rotating rod 5 drives the stirring rod assembly 6 to stir the spray paint in the accommodating chamber 1a; the torsion spring between adjacent stirring rods 6a on the stirring rod assembly 6 is compressed and deformed, and the angular amplitude of adjacent stirring rods 6a becomes smaller.

[0060] When the spray paint is added into the accommodating chamber 1a through the feeding pipe 2, the spray paint is added into the accommodating chamber 1a, the spray paint in the accommodating chamber 1a gradually increases, the sealing plate 4 moves downward, and the sealing plate 4 drives the rotating rod 5 to move downward relative to the first limiting portion 7. The first limiting portion 7 cooperates with the internal thread groove 5a, so that the rotating rod 5 drives the stirring rod assembly 6 to stir the spray paint in the accommodating chamber 1a.

[0061] Example 2: Please refer to Figure 8-Figure 12 , Embodiment 2 is different from Embodiment 1 in that it is a further improvement of Embodiment 1 to solve the problem that the length of the rotating rod 5 is too long. A fixing plate 8 is installed in the box body 1; the fixing plate 8 is located on the other side of the sealing plate 4 away from the accommodating chamber 1a; a telescopic device 9 is fixedly arranged between the fixing plate 8 and the sealing plate 4, which is telescopic only along the distance direction between the fixing plate 8 and the sealing plate 4; the number of the first limiting parts 7 is multiple; the telescopic device 9 includes a plurality of multi-layer connecting rods with increasing diameters from the inside to the outside, and the adjacent connecting rods are first connecting rods 90 1 and a second connecting rod 902; the first connecting rod 901 is located on the inner side of the second connecting rod 902; a first through hole 902b matching the first connecting rod 901 and allowing the first connecting rod 901 to pass through is provided on the top of the second connecting rod 902; a rectangular groove 902a is provided on the inner side wall of the first through hole 902b, and a slider 901a moving along the length direction of the rectangular groove 902a is fixedly connected to the outer side wall of the first connecting rod 901; a friction layer is provided in the rectangular groove 902a, and the slider 901a slides in the rectangular groove 902a,

[0062] The top end of the connecting rod located in the innermost layer is fixed to the sealing plate 4, and a first fixing rod 9-1 is fixedly arranged on the outer wall of the connecting rod located in the innermost layer; multiple first limiting parts 7 are respectively fixed to multiple connecting rod outer side walls away from the innermost layer of the connecting rod, and the first limiting part 7 extends into the internal thread groove 5a away from one end of the connecting rod; the opposite side walls of two adjacent first limiting parts 7 are respectively provided with first magnetic attraction parts 7-1 and second magnetic attraction parts 7-2 that adsorb each other; the purpose of setting the first magnetic attraction part 7-1 and the second magnetic attraction part 7-2 is that when the telescopic device 9 is extended along the telescopic direction, the multiple telescopic rods on the telescopic device 9 can be telescoped from the outside to the inside in sequence, and the telescopic rod located in the outer layer moves downward relative to the other telescopic rods in the inner layer. At this time, there is no relative position change between the other telescopic rods in the inner layer, and further, the first limiting parts 7 on the telescopic rods located in the outer layer can be moved out of the internal thread groove 5a in sequence.

[0063] The plurality of first limiting portions 7 are linearly arranged along the length direction of the rotating rod 5 .

[0064] The end of the first limiting portion 7 on the second layer of connecting rods, counted from the inside to the outside, away from the connecting rods is always located in the internal thread groove 5a.

[0065] The bottom end of the second placement groove 9 - 3 on the connecting rod connected to the first limiting portion 7 is flush with the upper end surface of the first limiting portion 7 on the connecting rod.

[0066] A locking structure is provided between adjacent telescopic rods, and the locking structure includes a mounting groove, a spring column and a fixing groove; the mounting groove is provided on the outer side wall of the first connecting rod 901, the spring column is installed in the mounting groove, and the fixing groove is provided on the inner side wall of the second connecting rod 902; the spring column extends into the fixing groove at one end away from the mounting groove, and is a spherical structure; when the second connecting rod 902 and the first connecting rod 901 are extended along the telescopic direction of the telescopic device 9, the spring column on the first connecting rod 901 is moved out of the fixing groove on the second connecting rod 902; when the second connecting rod 902 and the first connecting rod 901 are contracted along the telescopic direction of the telescopic device 9, the spring column is stuck in the fixing groove; so that when the telescopic device 9 is contracted along the telescopic direction, multiple telescopic rods can be regularly telescoped, and when the telescopic rods located in the inner layer move downward, they can move downward relative to the telescopic rods in the outer layer, and the positions of the other telescopic rods in the outer layer do not change, so that multiple telescopic rods can regularly complete telescoping, and further the first limiting portion 7 moved out of the rotating rod 5 can be moved in again.

[0067] A first placement groove 9-2 matching the bottom end of the first fixed rod 9-1 is provided at the top end of the connecting rod adjacent to the innermost connecting rod; a second placement groove 9-3 matching the bottom end of the first limiting portion 7 is provided at the top end of the third connecting rod from the inside to the outside and other connecting rods from the third connecting rod to the outside; the first fixed rod 9-1 has a third magnetic attraction portion, and the first limiting portion 7 closest to the first fixed rod 9-1 is provided with a fourth magnetic attraction portion attracted to the third magnetic attraction portion; the first limiting portion 7 connected to the inner connecting rod can be inserted into the second placement groove 9-3 provided at the top end of all outer connecting rods located outside the connecting rod; the bottom end of the connecting rod located at the outermost layer is fixed to the fixed plate 8; the functions of the third magnetic attraction portion and the fourth magnetic attraction portion are the same as those of the second magnetic attraction portion and the first magnetic attraction portion; the purpose of setting the first placement groove 9-2 and the second placement groove 9-3 is to ensure that the first limiting portion 7 does not affect the extension and retraction of multiple connecting rods of the telescopic device 9 when limiting the rotating rod 5.

[0068] Reference Fig. 9 and 10When the sealing plate 4 moves upward, the outermost connecting rod is driven by other connecting rods in the inner layer, and the first limiting portion 7 connected to the outermost connecting rod is disengaged from the first limiting portion 7 on the connecting rod of the inner layer that is most adjacent to it; when the other connecting rods move upward under the drive of the sealing plate 4, the connecting rod located on the outermost layer first moves downward relative to the other connecting rods, so that the first limiting portion 7 on the connecting rod located on the outermost layer moves downward relative to the rotating rod 5 on the sealing plate 4, so that the first limiting portion 7 drives the rotating rod 5 to rotate until the first limiting portion 7 on the connecting rod located on the outermost layer moves out of the rotating rod 5; as the sealing plate 4 gradually moves upward, the multiple connecting rods sleeved from the outside to the inside, and the multiple connecting rods from the outside to the inside in turn, the first limiting portion 7 connected to the corresponding connecting rods are gradually moved out of the rotating rod 5; the first limiting portion 7 on the second layer of connecting rods counted from the inside to the outside moves from the upper part of the b end of the rotating rod 5 to the rotating rod 5. At the lower part of end b, when the second layer of connecting rods cannot move relative to the first layer of connecting rods counted from the inside to the outside, the sealing plate 4 no longer moves upward.

[0069] When the sealing plate 4 moves downward, the sealing plate 4 drives the rotating rod 5 to move downward. Driven by the sealing plate 4, the multiple connecting rods on the extended telescopic device 9 are telescoped from the inside to the outside in sequence, and the end of the first limiting portion 7 on the outer connecting rod gradually moves into the rotating rod 5, thereby driving the rotating rod 5 to rotate.

[0070] Furthermore, the angle between the length direction of the first limiting portion 7 and the length direction of the rectangular groove 902a is greater than 0, thereby preventing the second placement groove 9-3 from being connected to the rectangular groove 902a or the first placement groove 9-2 from being connected to the rectangular groove 902a, which would affect the telescopic device 9 from telescoping along the height direction of the box body 1.

[0071] Furthermore, the stirring rod assembly 6 is compressed along the height direction of the box body 1. When compressed to the limit, both ends of the stirring rod 6a are tightly attached to the side walls of the box body 1, so that when the stirring rod assembly 6 is rotated by the rotating rod 5, one side of the stirring rod assembly 6 can contact the inner wall of the box body 1, so that the spray paint in the accommodating chamber 1a can be stirred more fully.

[0072] Example 3: Implementation 3 is further improved on the basis of Example 2 or Example 1, in which a spring is fixedly arranged between the fixed plate 8 and the sealing plate 4, and when the sealing plate 4 is below the feed pipe opening connected to the accommodating chamber 1a by the feed pipe 2 and the discharge pipe opening connected to the accommodating chamber 1a by the discharge pipe 3, the spring is always in a compressed state.

[0073] When the spray paint in the accommodating chamber 1a is extracted and the accommodating chamber 1a is not sufficiently sealed, the spring in a compressed state can drive the sealing plate 4 to move away from the fixed plate 8, so that the first limiting portion 7 can drive the rotating rod 5 to rotate to stir the spray paint in the accommodating chamber 1a.

[0074] When spray paint is added into the accommodating chamber 1a, the sealing plate 4 moves toward the fixed plate 8 under the force of the spray paint gravity, so that the first limiting portion 7 can drive the rotating rod 5 to rotate to stir the spray paint in the accommodating chamber 1a.

Claims

1. A surface spraying device for road construction, characterized in that: The surface spraying device for road construction has a spraying box for containing spray paint, the spraying box comprising a box body (1) with an opening at one end, a feed pipe (2), a discharge pipe (3), a sealing plate (4) dynamically sealed to the inner side wall of the open end of the box body (1), a rotating rod (5) mounted on the sealing plate (4) and rotatable relative to the box body (1), and a stirring rod assembly (6) that can be extended and retracted along the height direction of the box body (1); A containing chamber (1a) for containing spray paint is formed between the inner side wall of the box body (1) and the sealing plate (4); The feed pipe (2) and the discharge pipe (3) are both connected to the box body (1) and communicate with the accommodating chamber (1a); The a end of the rotating rod (5) is located in the accommodating chamber (1a) and is connected to one end of the stirring rod assembly (6); the b end is located on the other side of the sealing plate (4) away from the accommodating chamber (1a); an internal thread groove (5a) is provided on the outer surface of the b end of the rotating rod (5) and along the length direction of the rotating rod (5); and a first limiting portion (7) that can extend into the internal thread groove (5a) is fixedly installed on the other side of the box body (1) away from the accommodating chamber (1a); When the spray paint in the accommodating chamber (1a) is extracted through the discharge pipe (3), the feed pipe (2) is in a sealed state, and as the amount of spray paint in the accommodating chamber (1a) gradually decreases, the sealing plate (4) moves upward, and the first limiting portion (7) cooperates with the internal thread groove (5a), so that the rotating rod (5) drives the stirring rod assembly (6) to stir the spray paint in the accommodating chamber (1a); When spray paint is added into the accommodating chamber (1a) through the feed pipe (2), the sealing plate (4) moves downward, and the first limiting portion (7) cooperates with the internal thread groove (5a), so that the rotating rod (5) drives the stirring rod assembly (6) to stir the spray paint in the accommodating chamber (1a).

2. A surface spraying device for road construction according to claim 1, characterized in that: The stirring rod assembly (6) comprises a plurality of stirring rods (6a) connected in sequence; The ends of adjacent stirring rods (6a) are rotatably connected, and the angle between adjacent stirring rods (6a) is an acute angle; A torsion spring is provided between adjacent stirring rods (6a), and the torsion spring is located at the connection between adjacent stirring rods (6a).

3. A surface spraying device for road construction according to claim 2, characterized in that: A moving through groove (6a1) is formed on the side wall of the stirring rod (6a) connected to the end a of the rotating rod (5) on the stirring rod assembly (6); A U-shaped groove (5d) is provided at the top of the a-end of the rotating rod (5), and a guide rod (5c) passing through the movable through groove (6a1) is installed between two inner side walls of the U-shaped groove (5d).

4. A surface spraying device for road construction according to claim 1, characterized in that: The first limiting portion (7) comprises a mounting rod (701) and a limiting block (702); The mounting rod (701) is connected to the limiting block (702), and one end of the limiting block (702) away from the mounting rod (701) extends into the internal thread groove (5a) on the rotating rod (5).

5. A surface spraying device for road construction according to claim 1, characterized in that: A fixing plate (8) is installed in the box body (1); The fixing plate (8) is located on the other side of the sealing plate (4) away from the accommodating chamber (1a).

6. A surface spraying device for road construction according to claim 5, characterized in that: The fixing plate (8) is provided with a second through hole through which the end b of the rotating rod (5) passes; the first limiting portion (7) is a limiting ball (10), which is fixedly mounted on the inner side wall of the second through hole, and one end of the limiting ball (10) away from the inner side wall of the second through hole extends into the internal thread groove (5a) on the rotating rod (5).

7. A surface spraying device for road construction according to claim 5, characterized in that: A telescopic device (9) is fixedly arranged between the fixed plate (8) and the sealing plate (4) and is telescopic only along the distance direction between the fixed plate (8) and the sealing plate (4); the number of the first limiting portions (7) is plural; The telescopic device (9) comprises a plurality of connecting rods which are sleeved with increasing diameters from the inside to the outside, wherein adjacent connecting rods are a first connecting rod (901) and a second connecting rod (902); the first connecting rod (901) is located on the inner side of the second connecting rod (902); A first through hole (902b) matching the first connecting rod (901) and allowing the first connecting rod (901) to pass through is formed on the top of the second connecting rod (902); A rectangular groove (902a) is provided on the inner side wall of the first through hole (902b), and a sliding block (901a) that moves along the length direction of the rectangular groove (902a) is fixedly connected to the outer side wall of the first connecting rod (901); The top end of the innermost connecting rod is fixed to the sealing plate (4), and a first fixing rod (9-1) is fixedly arranged on the outer wall of the innermost connecting rod; A plurality of first limiting portions (7) are respectively fixed to a plurality of connecting rod outer side walls away from the innermost connecting rod; The opposite side walls of two adjacent first limiting portions (7) are respectively provided with a first magnetic attraction portion (7-1) and a second magnetic attraction portion (7-2) that attract each other; A first placement groove (9-2) matching the bottom end of the first fixing rod (9-1) is formed at the top end of the connecting rod adjacent to the innermost connecting rod; The top ends of the third layer of connecting rods counted from the inside to the outside and the other connecting rods counted from the third layer of connecting rods to the outside are all provided with a second placement groove (9-3) matching the bottom end of the first limiting portion (7); The first fixing rod (9-1) is provided with a third magnetic attraction portion, and the first limiting portion (7) closest to the first fixing rod (9-1) is provided with a fourth magnetic attraction portion which is attracted to the third magnetic attraction portion; The first limiting portion (7) connected to the inner connecting rod can be inserted into the second placement groove (9-3) opened at the top end of the outer connecting rod; The bottom end of the outermost connecting rod is fixed to the fixing plate (8).

8. A surface spraying device for road construction according to claim 7, characterized in that: The angle between the length direction of the first limiting portion (7) and the length direction of the rectangular groove (902a) is greater than 0.

9. A surface spraying device for road construction according to claim 2, characterized in that: The stirring rod assembly (6) is compressed along the height direction of the box body (1), and when compressed to the limit, both ends of the stirring rod (6a) are in close contact with the side wall of the box body (1).

10. A surface spraying device for road construction according to claim 5 or 7, characterized in that: A spring is fixedly arranged between the fixing plate (8) and the sealing plate (4).

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