CN212633084U

CN212633084U - Low-dust concrete spray gun

Info

Publication number: CN212633084U
Application number: CN202021172756.1U
Authority: CN
Inventors: 范丹莺; 姚利忠
Original assignee: Zhejiang Ruixin Building Material Co ltd
Current assignee: Zhejiang Ruixin Building Material Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-03-02
Anticipated expiration: 2030-06-22

Abstract

The utility model provides a low dust concrete spray gun, which comprises a spray head, the barrel, left side casing and right casing, the tip threaded connection of shower nozzle one end and barrel, the other end of shower nozzle is provided with expansion shape spout, still be provided with first spiral sand grip on the passageway inner wall of shower nozzle, the barrel outside is provided with annular boss, one side of annular boss is provided with left casing, the opposite side of annular boss is provided with right casing, left side casing and barrel outer wall threaded connection, right side casing and barrel outer wall threaded connection, left side casing and right casing form a confined annular cavity, be provided with water spray channel on the annular boss, water spray channel switches on annular cavity and barrel inner chamber, the last spray pipe that has arranged of water spray channel, be provided with second spiral sand grip in the spray pipe, still be provided with the inlet tube on the casing of the right. The utility model has the advantages of less sprayed concrete dust and strong adhesive force.

Description

Low-dust concrete spray gun

Technical Field

The utility model relates to a spray gun technical field especially relates to a low dust concrete spray gun.

Background

The spray gun of the dry spraying method shotcrete machine is generally adopted at home, and the spray gun introduces water into the gun tube, mixes with the dry powder material of the concrete that moves in the gun tube, then spouts from the spout, because the dry powder material of concrete functioning speed is fast for water and dry powder material of concrete mix the effect poor, cause spun concrete dust more, moreover spun concrete adhesive force on the wall is not strong.

SUMMERY OF THE UTILITY MODEL

To the more and not strong problem of adhesive force of the concrete gun spun concrete dust that exists among the prior art, the utility model provides a low dust concrete gun.

According to the embodiment of the utility model, a low dust concrete spray gun comprises a spray head, a gun barrel, a left shell and a right shell, wherein one end of the spray head is connected with the end part of the gun barrel through screw threads, the other end of the spray head is provided with an expansion-shaped nozzle, the inner wall of a channel of the spray head is also provided with a first spiral raised line, the outer part of the gun barrel is provided with an annular boss, one side of the annular boss is provided with the left shell, the other side of the annular boss is provided with the right shell, the left shell is in threaded connection with the outer wall of the gun barrel, the right shell is in threaded connection with the outer wall of the gun barrel, the left shell and the right shell form a closed annular cavity, the annular boss is provided with a water spraying channel, the water spraying channel is communicated with the inner cavity of the gun barrel, a water spraying pipe is arranged on the, and a water inlet pipe is also arranged on the right shell.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the sprayed concrete dust is less. The water spraying pipes are arranged, and the second spiral raised lines are arranged in the water spraying pipes, so that water can still rotate under the interference of the spiral raised lines when flowing in the water spraying pipes, and the water sprayed out of the water spraying pipes at a high speed can impact the dry concrete powder while rotating, so that the dry concrete powder can be more fully wetted; when the concrete material passes through the spray head, the first spiral raised line in the spray head disturbs the concrete material again, and the mixing uniformity is further enhanced; the negative pressure at the nozzle can be reduced by the aid of the expanding nozzle, and the amount of sprayed dust is further reduced.

2. The sprayed concrete has strong adhesion. The first spiral sand grip in the nozzle enables the sprayed concrete to generate rotary motion, and better adhesive force can be obtained when the spray coating is carried out on the wall surface.

Drawings

Fig. 1 is a schematic sectional structural view of a low-dust concrete spray gun according to an embodiment of the present invention.

Fig. 2 is an enlarged view of a point a in fig. 1.

Fig. 3 is a schematic cross-sectional view of a low-dust concrete gun according to another embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of a low-dust concrete gun according to another embodiment of the present invention.

In the above drawings: 1. a barrel; 2. a spray head; 3. a left housing; 4. a right housing; 5. a water inlet pipe; 6. sealing the rubber gasket; 7. a water spray pipe; 11. a water spray channel; 12. an annular boss; 21. a first spiral rib; 22. an expanded spout; 71. a second spiral rib.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

As shown in figures 1 and 2, the embodiment of the utility model provides a low dust concrete gun, the tip threaded connection of 2 one ends of shower nozzle and barrel 1 to can take off the shower nozzle or install, the operation is very simple, is convenient for maintain the maintenance. The other end of the nozzle 2 is provided with an expansion-shaped nozzle 22, which can reduce the negative pressure at the outlet and reduce the power of dust escape. The inner wall of the channel of the nozzle 2 is also provided with a first spiral convex strip 21.

As shown in fig. 1 and 2, barrel 1 outside is provided with annular boss 12, one side of annular boss 12 is provided with left casing 3, the opposite side of annular boss 12 is provided with right casing 4, left casing 3 and 1 outer wall threaded connection of barrel, right casing 4 and 1 outer wall threaded connection of barrel, left casing 3 and right casing 4 form a confined toroidal cavity, can take off left casing 3 and right casing 4 respectively and wash, make the utility model discloses difficult jam and easily clearance. 12 water spray channels 11 are arranged on the annular boss 12, the water spray channels 11 conduct the annular cavity with the inner cavity of the gun barrel 1, and the preferable mode is as follows: the gun barrel is characterized in that 4 groups of water spraying channels are arranged as shown in figure 1, every two adjacent groups of water spraying channels are arranged at 90 degrees, each group of water spraying channels comprises 3 water spraying channels 11 arranged along the central line of the gun barrel, a water spraying pipe 7 is arranged on each water spraying channel 11, a second spiral raised line 71 is arranged in each water spraying pipe 7, and a water inlet pipe 5 is further arranged on the right shell 4. The joint surface of the left shell 3 and the right shell 4 is also provided with a sealing rubber gasket 6, the included angle between the center line of the water spray pipe 7 and the center line of the gun barrel 1 is b, b is more than or equal to 30 degrees and less than or equal to 70 degrees, the arrangement method has the advantages that water flows head on to the dry concrete powder at a certain angle, the dry concrete powder is mixed more uniformly after mutual impact, and the defect is that part of the kinetic energy of the concrete is lost.

As shown in fig. 3, according to another embodiment of the present invention, other structures are the same as those shown in fig. 1 and 2 except that the center line of the water spray pipe 7 is perpendicular to the center line of the gun barrel 1.

As shown in fig. 4, according to another embodiment of the present invention, the other structure is the same as fig. 1 and fig. 2, except that the included angle between the center line of the water spray pipe 7 and the center line of the gun barrel 1 is b, and b is more than or equal to 120 degrees and less than or equal to 150 degrees. The setting mode is an excellent setting mode, the loss of the kinetic energy of the concrete is small, and the mixing is uniform.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. A low dust concrete gun which characterized in that: comprises a spray head (2), a gun barrel (1), a left shell (3) and a right shell (4), one end of the spray head (2) is in threaded connection with the end part of the gun barrel (1), the other end of the spray head (2) is provided with an expansion nozzle (22), a first spiral raised line (21) is further arranged on the inner wall of a channel of the spray head (2), an annular boss (12) is arranged outside the gun barrel (1), one side of the annular boss (12) is provided with the left shell (3), the other side of the annular boss (12) is provided with the right shell (4), the left shell (3) is in threaded connection with the outer wall of the gun barrel (1), the right shell (4) is in threaded connection with the outer wall of the gun barrel (1), the left shell (3) and the right shell (4) form a closed annular cavity, a plurality of water spraying channels (11) are arranged on the annular boss (12), the water spraying channel (11) is used for communicating the annular cavity with the inner cavity of the gun barrel (1), a water spraying pipe (7) is arranged on the water spraying channel (11), a second spiral raised line (71) is arranged in the water spraying pipe (7), and a water inlet pipe (5) is further arranged on the right shell (4).

2. A low dust concrete gun as claimed in claim 1, characterized in that the joint surface of said left (3) and right (4) housings is provided with a sealing rubber gasket (6).

3. A low dust concrete gun as claimed in claim 1 or 2, characterized in that the centre line of the water lance (7) is at an angle b of 30 ° to 70 ° to the centre line of the lance tube (1).

4. A low dust concrete gun as claimed in claim 1 or 2, characterized in that the angle between the centre line of the water lance tube (7) and the centre line of the lance tube (1) is b, 120 ° ≦ b ≦ 150 °.

5. A low dust concrete gun according to claim 1 or 2, characterized in that the centre line of the water lance tube (7) is perpendicular to the centre line of the lance tube (1).