Handheld high-pressure spray gun for hydraulic stand column

Abstract

The utility model relates to a handheld high-pressure spray gun for a hydraulic stand column, which comprises a spray gun main body, a spray gun cover and a spray gun cover, the two arc-shaped plates can be hinged to the front end of the spray gun body in a mutually rotating opening and closing mode and can be kept fixed at any position within the rotating range so as to surround the peripheral walls of the hydraulic stand columns with different diameters; the spray heads are arranged on the opposite surfaces of the arc-shaped plate, communicate with the high-pressure air cavity and the coating cavity and are used for spraying the coating to the peripheral wall of the hydraulic stand column; the handle can be rotatably connected with the rear end of the spray gun body around the horizontal axis so as to adjust the included angle between the handle and the horizontal axis. The hydraulic stand column paint spraying device has the beneficial effects that the spray heads on the two arc-shaped plates can spray paint on the peripheral walls of hydraulic stand columns with different diameters at the same time, so that the adaptability is expanded, the single-time spraying coverage range is widened, and the spraying efficiency is improved; operation is convenient, and paint spraying quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to spray gun technical field especially relates to a handheld high pressure spray gun for hydraulic column. BACKGROUND

[0002] For the paint spraying operation of the hydraulic column, the traditional method is to use the handheld spray gun to move along the circumferential and axial direction of the hydraulic column for spraying, and the single spraying range is limited, and the spraying efficiency is low. Since the hydraulic column has a large height, when the staff holds the handle of the handheld spray gun and moves along the axial direction of the hydraulic column, it is difficult for the spray gun nozzle to be perpendicular to the column wall when spraying at the upper and lower parts of the hydraulic column, which affects the spraying thickness and quality. When manually holding the spray gun and moving along the axial direction, the body posture needs to be frequently adjusted to adapt to different height positions, and the operation difficulty is large. SUMMARY

[0003] (I) Technical problem to be solved

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a handheld high pressure spray gun for hydraulic column, which solves the technical problems of low spraying efficiency, large operation difficulty and poor spraying quality of the traditional handheld spray gun.

[0005] (II) Technical scheme

[0006] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the utility model comprises:

[0007] The utility model embodiment provides a handheld high pressure spray gun for hydraulic column, which comprises:

[0008] The spray gun body is internally provided with a high pressure cavity and a paint cavity;

[0009] Two arc-shaped plates, the two arc-shaped plates can be hingedly connected to the front end of the spray gun body and can be fixed at any position within the rotation range, so as to surround the circumferential wall of the hydraulic column with different diameters;

[0010] The spray head is arranged on the opposite surface of the arc-shaped plate, and the spray head is connected with the high pressure cavity and the paint cavity, and is used for spraying paint to the circumferential wall of the hydraulic column;

[0011] The handle is rotatably connected to the rear end of the spray gun body around the horizontal axis, so as to adjust the included angle between the handle and the horizontal axis.

[0012] According to the utility model, the arc-shaped plate opening and closing mechanism comprises:

[0013] The four connecting rods are horizontally arranged, two adjacent connecting rods are fixedly connected with a first hinge seat and a second hinge seat respectively, the first hinge seat and the second hinge seat are fixedly connected with two arc-shaped plates respectively, and the first hinge seat and the second hinge seat are both rotationally connected with a first hinge shaft vertically arranged, and the first hinge shaft is rotationally connected with the spray gun body; the other two adjacent connecting rods are fixedly connected with a third hinge seat and a fourth hinge seat respectively, and the third hinge seat and the fourth hinge seat are both rotationally connected with a second hinge shaft vertically arranged;

[0014] The screw rod is horizontally arranged and is threadedly connected with the second hinge shaft;

[0015] When the screw rod rotates, the second hinge shaft can be driven to move along the axis of the screw rod, and the first hinge seat and the second hinge seat can drive the two arc-shaped plates to rotate to open and close.

[0016] According to the utility model, the screw rod is rotationally connected with the spray gun body;

[0017] A guide groove extending along the axial direction of the screw rod is formed in the spray gun body, and the guide groove is used for sliding the fourth hinge seat.

[0018] According to the utility model, the handle driving mechanism comprises:

[0019] The rotating rod is fixedly connected with the upper end of the handle and rotationally connected with the rear end of the spray gun body, and the first end extends out of the first side of the spray gun body;

[0020] The locking piece is connected with the first end of the rotating rod and is used for locking and unlocking the rotating rod;

[0021] When the locking piece locks the rotating rod, the handle is locked on the spray gun body.

[0022] When the locking piece unlocks the rotating rod, the handle can drive the rotating rod to rotate relative to the spray gun body around the horizontal axis.

[0023] According to the utility model, the locking piece is a screw sleeve threadedly connected with the first end of the rotating rod;

[0024] When the locking piece rotates to abut against the first side of the spray gun body, the rotating rod can be locked;

[0025] When the locking piece rotates to be away from the first side of the spray gun body, the rotating rod can be unlocked.

[0026] According to the utility model,

[0027] The second end of the rotating rod extends from the second side of the spray gun body and is provided with an indicating block on the peripheral wall;

[0028] The second side of the spray gun body is provided with a scale line around the rotating rod;

[0029] The scale indicated by the indicating block corresponds to the included angle of the handle and the horizontal axis.

[0030] According to the utility model, the included angle of the handle and the horizontal axis is 90°-135°.

[0031] According to the utility model, the high-pressure air cavity and the paint cavity of the spray gun body are respectively communicated with the spray head through pipelines.

[0032] According to the utility model, the first joint and the second joint for respectively communicating the high-pressure air cavity and the paint cavity are arranged on the spray gun body.

[0033] The first joint and the second joint communicate the spray head through external pipelines and deliver high-pressure air and paint to the spray head.

[0034] According to the utility model, a plurality of spray heads in multiple rows and columns are arranged on each arc-shaped plate.

[0035] (Three) beneficial effects

[0036] The hand-held high-pressure spray gun of the hydraulic column of the utility model has the following beneficial effects:

[0037] Wide adaptability and high paint spraying efficiency: the two arc-shaped plates are arranged to be opened and closed by rotating each other, so that the two arc-shaped plates can be adapted to the hydraulic columns with different diameters, and the spray heads on the two arc-shaped plates can simultaneously spray paint on the peripheral walls of the hydraulic columns with different diameters, so as to expand the adaptability, improve the single spraying coverage, and improve the spraying efficiency.

[0038] Convenient operation and guaranteed paint spraying quality: when the hydraulic columns at different heights need to be sprayed, the handle can be rotated around the horizontal axis to adjust the included angle of the upper end of the handle and the horizontal axis, so as to facilitate hand-held operation. For example, when a higher position needs to be sprayed, the included angle of the upper end of the handle and the horizontal axis can be relatively adjusted to be smaller, and when a lower position needs to be sprayed, the included angle of the upper end of the handle and the horizontal axis can be relatively adjusted to be larger. By adjusting the handle, the horizontal nature of the spray gun body can be conveniently maintained when the hydraulic columns at higher and lower positions are sprayed, so that the spray heads can be perpendicular to the peripheral walls of the hydraulic columns, the consistency of the spraying thickness is guaranteed, and the spraying quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is a three-dimensional schematic view of the two arc-shaped plates of the hand-held high-pressure spray gun of the utility model at a first included angle.

[0040] Figure 2 A three-dimensional schematic diagram of the two arc-shaped plates of a handheld high-pressure spray gun when they are at the second included angle;

[0041] Figure 3 Figure 1 A bottom view;

[0042] Figure 4 for Figure 1 A partial schematic diagram;

[0043] Figure 5 for Figure 4 A partial schematic diagram;

[0044] Figure 6 for Figure 1 A schematic diagram of the decomposition process;

[0045] Figure 7 for Figure 6 A partial schematic diagram;

[0046] Figure 8 for Figure 1 A sectional view.

[0047] [Explanation of Labels in the Attached Image]

[0048] 1: Spray gun body; 11: Scale line; 12: First connector; 13: Guide groove; 14: Trigger; 15: High-pressure air chamber; 16: Paint chamber; 17: Second connector;

[0049] 2: Curved plate;

[0050] 3: Spray nozzle;

[0051] 4: Handle;

[0052] 5: Arc-shaped plate opening and closing mechanism; 51: Four-bar linkage; 511: First hinge seat; 512: Second hinge seat; 513: Third hinge seat; 514: Fourth hinge seat; 515: First hinge shaft; 516: Second hinge shaft; 52: Screw;

[0053] 6: Handle drive mechanism; 61: Rotating rod; 611: Slot; 62: Locking element; 63: Indicator block;

[0054] 7: External pipeline;

[0055] 8: Flow valve. Detailed Implementation

[0056] To better explain and facilitate understanding of this utility model, a detailed description of the present utility model is provided below with reference to the accompanying drawings and specific embodiments. The terms "upper" and "lower" are used herein.

[0057] With reference to Figures 1-8 The utility model discloses a hand -held high -pressure spray gun for hydraulic column, including spray gun main body 1, two arc plate 2, spray head 3 and handle 4.

[0058] The spray gun main body 1 is internally provided with a high-pressure gas cavity and a paint cavity. The two arc plates 2 are hingedly connected to the front end of the spray gun main body 1 and can be fixed at any position within the rotation range, so as to surround the circumferential wall of the hydraulic column with different diameters. The spray head 3 is arranged on the opposite surface of the arc plate 2, and the spray head 3 is connected to the high-pressure gas cavity and the paint cavity, and is used for spraying paint to the circumferential wall of the hydraulic column. The handle 4 is rotatably connected to the rear end of the spray gun main body 1 around a horizontal axis, so as to adjust the included angle between the handle 4 and the horizontal axis.

[0059] It should be noted that the hand-held high-pressure spray gun applies the working principle of the high-pressure spray gun. When in use, the compressed air in the high-pressure gas cavity can atomize the liquid paint in the paint cavity into fine particles and uniformly spray the target surface by the spray head 3.

[0060] Based on the above setting, the advantages of the hand-held high-pressure spray gun are as follows:

[0061] Wide adaptability and high paint spraying efficiency: the two arc plates 2 are arranged to be rotatable relative to each other, so that the two arc plates 2 can be adapted to surround the hydraulic column with different diameters, and the spray heads 3 on the two arc plates 2 can simultaneously spray paint to the circumferential wall of the hydraulic column with different diameters, so as to expand the adaptability, improve the single spraying coverage, and improve the spraying efficiency.

[0062] Convenient operation and guarantee of paint spraying quality: when it is necessary to spray the hydraulic column at different heights, the handle 4 can be rotated around the horizontal axis to adjust the included angle between the upper end of the handle 4 and the horizontal axis, so as to facilitate the hand-held operation. For example, when it is necessary to spray the higher position, the included angle between the upper end of the handle 4 and the horizontal axis can be relatively adjusted to be smaller, and when it is necessary to spray the lower position, the included angle between the upper end of the handle 4 and the horizontal axis can be relatively adjusted to be larger. By adjusting the handle 4, the horizontal nature of the spray gun main body can be conveniently maintained when spraying the hydraulic column at the higher position and the lower position, so that the spray heads can be perpendicular to the circumferential wall of the hydraulic column, the consistency of the spraying thickness is guaranteed, and the spraying quality is improved.

[0063] Preferably, a plurality of spray heads 3 in multiple rows and columns are arranged on each arc plate 2, so as to improve the single spraying range and improve the spraying efficiency.

[0064] With reference to Figure 1 , 3 And 8, specifically, to realize the delivery of high-pressure gas and paint to the spray head 3, the spray gun main body 1 is provided with a first joint 12 and a second joint 17 which respectively communicate with the high-pressure gas cavity 15 and the paint cavity 16.

[0065] The first joint 12 and the second joint 17 are connected to the spray head 3 through the external pipe 7 and deliver high-pressure gas and paint to the spray head 3.

[0066] More specifically, a gas delivery cavity 43 is arranged in the handle 4, the high-pressure gas cavity 15 on the spray gun body 1 is connected to the gas delivery cavity 43 in the handle 4 through the external pipe 7, and a third joint 41 is arranged on the handle 4 to connect the gas delivery cavity 43 to an external high-pressure gas source.

[0067] The high-pressure gas source delivers high-pressure gas to the high-pressure gas cavity 15 through the gas delivery cavity 43.

[0068] More specifically, flow valves 8 are arranged on the second joint 17 and the third joint 41 to adjust the flow of paint and the flow of gas, respectively.

[0069] Further, a trigger 14 is arranged on the spray gun body 1 to connect or disconnect the gas delivery cavity 43 and the high-pressure gas cavity 15 to deliver or stop delivering high-pressure gas to the spray head 3.

[0070] The trigger 14 is rotatably connected to the spray gun body 1 about a horizontal axis, a horizontally oriented switching rod is rotatably connected to the trigger 14, the switching rod is movably inserted into the spray gun body 1 along the length direction of the trigger 14 and is horizontally movable, a through hole is arranged on the switching rod, and a spring is arranged on the switching rod.

[0071] In the initial state, the through hole on the switching rod is away from the high-pressure gas cavity 15 and blocks the connection between the high-pressure gas cavity 15 and the gas delivery cavity 43.

[0072] When the trigger 14 is pressed, the trigger 14 rotates about the horizontal axis, the switching rod moves horizontally and along the length direction of the trigger 14, the through hole on the switching rod can connect the high-pressure gas cavity 15 to connect the high-pressure gas cavity 15 and the gas delivery cavity 43, and the spring is in a contracted state.

[0073] When the trigger 14 is released, the spring rebounds, drives the switching rod to move reversely, so that the through hole on the switching rod is away from the high-pressure gas cavity 15 and blocks the connection between the high-pressure gas cavity 15 and the gas delivery cavity 43, and drives the trigger 14 to return.

[0074] Referring to Figure 4 and 5 Further, to adjust the opening angle of the two arc-shaped plates 2, the handheld high-pressure spray gun further comprises an arc-shaped plate opening and closing mechanism 5. The arc-shaped plate opening and closing mechanism 5 comprises a four-link mechanism 51 and a screw rod 52. The four-link mechanism 51 is a hinged four-bar mechanism.

[0075] The four-bar linkage 51 is horizontally arranged, and the ends of two adjacent links in the four-bar linkage 51 are fixedly connected with a first hinged seat 511 and a second hinged seat 512 respectively, the first hinged seat 511 and the second hinged seat 512 are fixedly connected with the two arc-shaped plates 2 respectively, and the first hinged seat 511 and the second hinged seat 512 are both rotatably connected with a first hinged shaft 515 vertically oriented, the first hinged shaft 515 is rotatably connected with the spray gun body 1. The ends of the other two adjacent links in the four-bar linkage 51 are fixedly connected with a third hinged seat 513 and a fourth hinged seat 514 respectively, and the third hinged seat 513 and the fourth hinged seat 514 are both rotatably connected with a second hinged shaft 516 vertically oriented. The screw 52 is horizontally oriented, and the screw 52 is threadedly connected with the second hinged shaft 516.

[0076] When the screw 52 rotates, the second hinged shaft 516 can be driven to move along the axis of the screw 52 to make the second hinged shaft 516 approach or move away from the first hinged shaft 515, and drive the third hinged seat 513 and the fourth hinged seat 514 to rotate around the second hinged shaft 516, the first hinged shaft 515 is limited from moving by the spray gun body 1, the first hinged seat 513 and the second hinged seat 514 rotate around the first hinged shaft 515, and drive the two arc-shaped plates 2 to open and close.

[0077] Specifically, the screw 52 is threadedly connected with the spray gun body 1, and the screw 52 can rotate relative to the spray gun body 1.

[0078] A guide groove 13 extending along the axial direction of the screw 52 is formed in the spray gun body 1, and the guide groove 13 is used for sliding the fourth hinged seat 514 to limit the second hinged shaft 516 connected with the fourth hinged seat 514 from moving along the axial direction of the screw 52 when the screw 52 rotates.

[0079] Referring to Figure 6 and 7 , further, to achieve the angle adjustment of the handle 4, the handheld high-pressure spray gun further comprises a handle driving mechanism 6. The handle driving mechanism 6 comprises a rotating rod 61 horizontally oriented and a locking member 62.

[0080] The rotating rod 61 is fixedly connected with the upper end of the handle 4 and rotatably connected with the rear end of the spray gun body 1, and the first end of the rotating rod 61 extends out of the first side of the spray gun body 1. The locking member 62 is connected with the first end of the rotating rod 61 and is used for locking and releasing the rotating rod 61.

[0081] When the locking member 62 locks the rotating rod 61, the handle 4 is locked on the spray gun body 1.

[0082] When the locking member 62 loosens the rotating rod 61, the handle 4 can drive the rotating rod 61 to rotate relative to the spray gun body 1 around the horizontal axis to adjust the included angle between the upper end of the handle 4 and the horizontal axis, and after the included angle is adjusted, the handle 4 is locked again by the locking member 62 to avoid displacement of the handle 4 and keep fixed at any position in the rotating range.

[0083] Specifically, the locking member 62 is a threaded sleeve screwed on the first end of the rotating rod 61.

[0084] When the locking member 62 is rotated to abut against the first side of the spray gun body 1, the locking member 62 drives the rotating rod 61 to abut against the second side of the spray gun body 1, and the rotating rod 61 is locked by being squeezed by the two sides of the spray gun body 1.

[0085] When the locking member 62 is rotated to be away from the first side of the spray gun body 1, the spray gun body 1 can loosen the rotating rod 61.

[0086] More specifically, the rotating rod 61 is inserted into the U-shaped groove formed at the rear end of the spray gun body 1.

[0087] When the locking member 62 abuts against the first side of the spray gun body 1 and drives the rotating rod 61 to abut against the second side of the spray gun body 1, the two side walls of the U-shaped groove can squeeze the rotating rod 61 to lock the rotating rod 61.

[0088] More specifically, the second end of the rotating rod 61 protrudes from the second side of the spray gun body 1, and the second end of the rotating rod 61 is a flat end to be driven by the locking member 62 to abut against the second side of the spray gun body 1 when the locking member 62 abuts against the first side of the spray gun body 1.

[0089] Specifically, the upper end of the handle 4 is provided with a through hole for inserting the rotating rod 61, and the inner wall of the through hole is provided with a protrusion 42 inserted into a slot 611 extending along the axis of the rotating rod 61 formed on the peripheral wall of the rotating rod 61 to achieve fixed connection of the handle 4 and the rotating rod 61, and the handle 4 can drive the rotating rod 61 to rotate relative to the spray gun body 1.

[0090] Further, to directly display the included angle between the handle 4 and the horizontal axis, the hand-held high-pressure spray gun is also provided with an angle indicating structure:

[0091] The second end of the rotating rod 61 protrudes from the second side of the spray gun body 1, and an indicating block 63 is arranged on the peripheral wall. The second side of the spray gun body 1 is provided with a scale line 11 surrounding the rotating rod 61.

[0092] The scale indicated by the indicating block 63 corresponds to the included angle between the upper end of the handle 4 and the horizontal axis, so as to facilitate the staff to adjust directly and improve the adjustment accuracy.

[0093] Preferably, the angle between the handle 4 and the horizontal axis is 90°-135°, which meets the spraying operation of most models of hydraulic columns.

[0094] Further, the high-pressure air cavity and the paint cavity of the spray gun body 1 are respectively communicated with the spray head 3 through pipelines.

[0095] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature, which can be directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature is "below", "under" and "under" the second feature, which can be directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0096] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0097] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can modify, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A hand-held high pressure lance for a hydraulic column, characterized in that The utility model relates to a kind of spray gun, including: Spray gun body (1), high-pressure air cavity (15) and coating cavity (16) are set inside; Two arc plates (2), two The arc plate (2) can be rotatably hinged to the front end of the spray gun body (1) and can be kept fixed at any position within the rotation range, to surround the circumferential wall of hydraulic column of different diameters; Spray head (3), the spray head (3) is arranged on the opposite surface of the arc plate (2), and the spray head (3) is communicated with the high-pressure air cavity (15) and the coating cavity (16), for spraying coating to the circumferential wall of the hydraulic column; Handle (4), the handle (4) can be rotatably connected to the rear end of the spray gun body (1) around horizontal axis, to adjust the included angle of the handle (4) and horizontal axis.

2. The hand-held high-pressure lance for a hydraulic lift column according to claim 1, characterized in that It also includes arc plate opening and closing mechanism (5), the arc plate opening and closing mechanism (5) includes: Horizontally arranged four connecting rods (51), wherein the end of two adjacent connecting rods is fixedly connected with first hinged seat (511) and second hinged seat (512) respectively, the first hinged seat (511) and the second hinged seat (512) are fixedly connected with two arc plates (2) respectively, and the first hinged seat (511) and the second hinged seat (512) are rotatably connected on the first hinged shaft (515) vertically oriented, the first hinged shaft (515) is rotatably connected on the spray gun body (1);The end of other two adjacent connecting rods is fixedly connected with third hinged seat (513) and fourth hinged seat (514) respectively, the third hinged seat (513) and the fourth hinged seat (514) are rotatably connected on the second hinged shaft (516) vertically oriented; Horizontally oriented screw rod (52), the screw rod (52) is threadedly connected on the second hinged shaft (516); When the screw rod (52) rotates, the second hinged shaft (516) can be driven to move along the axis of the screw rod (52), and the first hinged seat (511) and the second hinged seat (512) can drive two arc plates (2) to rotate opening and closing.

3. The hand-held high-pressure lance for a hydraulic lift column according to claim 2, characterized in that The screw rod (52) is rotatably connected on the spray gun body (1); The guide groove (13) extending along the axial direction of the screw rod (52) is formed on the spray gun body (1), and the guide groove (13) is used for sliding the fourth hinged seat (514).

4. The hand-held high-pressure lance for a hydraulic lift column of claim 1, wherein, It also includes handle driving mechanism (6), the handle driving mechanism (6) includes: Horizontally oriented rotating rod (61), the rotating rod (61) is fixedly connected with the upper end of the handle and rotatably connected with the rear end of the spray gun body (1), and the first end protrudes from the first side of the spray gun body (1); Locking member (62), connected with the first end of the rotating rod (61), for locking and releasing the rotating rod (61); When the locking member (62) locks the rotating rod (61), the handle (4) is locked on the spray gun body (1); When the locking member (62) releases the rotating rod (61), the handle (4) can drive the rotating rod (61) to rotate around horizontal axis relative to the spray gun body (1).

5. The hand-held high-pressure lance for a hydraulic lift column according to claim 4, characterized in that The locking member (62) is a threaded sleeve connecting the first end of the rotating rod (61); When the locking member (62) is rotated to abut against the first side of the spray gun body (1), the rotating rod (61) can be locked; When the locking member (62) is rotated to be away from the first side of the spray gun body (1), the rotating rod (61) can be unlocked.

6. The handheld high-pressure spray gun for hydraulic stand column according to claim 4, wherein, The second end of the rotating rod (61) extends from the second side of the spray gun body (1), and an indicating block (63) is arranged on the peripheral wall; The second side of the spray gun body (1) is provided with a scale line (11) surrounding the rotating rod (61); The scale indicated by the indicating block (63) corresponds to the included angle between the handle (4) and the horizontal axis.

7. The hand-held high-pressure lance for a hydraulic lift column of claim 1, wherein, The included angle between the handle (4) and the horizontal axis is 90°-135°.

8. The hand-held high-pressure lance for a hydraulic lift column of claim 1, wherein, The high-pressure gas cavity and the paint cavity of the spray gun body (1) are respectively communicated with the spray head (3) through pipelines.

9. The hand-held high-pressure lance for a hydraulic lift column of claim 8, wherein, The spray gun body (1) is provided with a first joint (12) and a second joint (17) respectively communicating with the high-pressure gas cavity (15) and the paint cavity (16); The first joint (12) and the second joint (17) are communicated with the spray head (3) through an external pipeline (7) and deliver high-pressure gas and paint to the spray head (3).

10. The hand-held high-pressure lance for a hydraulic lift column of claim 1, wherein, Each of the arc-shaped plates (2) is provided with a plurality of rows and columns of the spray heads (3).

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