阅读说明：本技术 一种偏转喷头 (Deflection spray head ) 是由 刘成 于 2020-08-25 设计创作，主要内容包括：本发明涉及一种偏转喷头,包括喷头壳体和喷芯,所述喷芯安装于所述喷头壳体内,所述喷芯内开有流道,所述流道包括依次连接的锥型缩口流道段、转角流道段和直筒流道段,所述锥型缩口流道段的小端与所述转角流道段连接。用以解决现有的高压水射流喷头无法进行狭小空间的混凝土破碎、无法打击到钢筋后面的混凝土的技术问题。(The invention relates to a deflection spray head which comprises a spray head shell and a spray core, wherein the spray core is arranged in the spray head shell, a flow channel is formed in the spray core, the flow channel comprises a conical necking flow channel section, a corner flow channel section and a straight cylinder flow channel section which are sequentially connected, and the small end of the conical necking flow channel section is connected with the corner flow channel section. The high-pressure water jet nozzle is used for solving the technical problems that the existing high-pressure water jet nozzle cannot crush concrete in a narrow space and cannot hit the concrete behind a reinforcing steel bar.)

1. The utility model provides a shower nozzle deflects, includes the shower nozzle casing and spouts the core, spout the core install in the shower nozzle casing its characterized in that: the spray core is internally provided with a flow passage, the flow passage comprises a conical necking flow passage section, a corner flow passage section and a straight-tube flow passage section which are sequentially connected, and the small end of the conical necking flow passage section is connected with the corner flow passage section.

2. The deflection spray head of claim 1, wherein: the spray head shell is in a straight cylinder shape, one end of the spray head shell is provided with a high-pressure pipe connecting groove, the bottom of the high-pressure pipe connecting groove is provided with a spray core mounting cavity for mounting the spray core, and the spray head shell is internally provided with a nozzle communicated with the spray core mounting cavity and the outside of the spray head shell; after the spray core is installed, the tapered necking runner section is communicated with the high-pressure pipe connecting groove, and the straight barrel runner section is communicated with the spray nozzle.

3. The deflection spray head of claim 2, wherein: the value range of an included angle alpha between the central axis of the straight-cylinder runner section and the central axis of the high-pressure pipe connecting groove is more than 0 and less than or equal to 175 degrees.

4. The deflection spray head of claim 1, wherein: and the joints among the tapered necking runner sections, the corner runner sections and the straight-barrel runner sections are in smooth transition.

5. The deflection spray head of claim 4, wherein: and the large end fillet of the tapered necking runner section is in transition arrangement.

6. The deflection spray head of claim 2, wherein: the straight cylinder flow passage section is coaxial with the nozzle, and the radius of the nozzle is not less than that of the straight cylinder flow passage section.

7. The deflection spray head of claim 2, wherein: the one end that the shower nozzle casing kept away from high-pressure pipe spread groove is opened has the bracing piece spread groove, the bracing piece spread groove can be connected with the bracing piece.

8. The deflection spray head of claim 1, wherein: the spray core is made by 3D printing.

Technical Field

The invention relates to the field of high-pressure water jet crushing, in particular to a deflection nozzle.

Background

The high-pressure water jet technology is used to eliminate degraded concrete from concrete structure with high-pressure water jet to repair the building structure. The working principle is that high-pressure water is pressurized by a high-pressure pump and conveyed to an actuating mechanism, the actuating mechanism sprays high-speed water flow to act on the surface of concrete, the high-speed water flow penetrates into micropores on the surface of the concrete, the speed is converted into pressure, and when the pressure is greater than the tensile strength of the concrete, the concrete is crushed. Because the surface of the steel bar is compact and has no micropores, high-pressure water cannot be drilled into the steel bar, and the steel bar is not damaged.

The axial direction of the outlet of the conventional high-pressure water jet nozzle is consistent with the axial direction of the high-pressure hard pipe. When the high-pressure water jet breaks the concrete, because the steel bars are pre-embedded in the concrete, the water jet can be hindered by the steel bar structure in space when being stricken linearly, and can not directly strike the concrete behind the steel bars along the original axial direction of the gun rod or the nozzle. Especially to the reservation reinforcing bar breakage of narrow and small space concrete, because the reinforcing bar net blocks, current high-pressure water jet spray gun can't stretch into the reinforcing bar net to the concrete breakage in narrow and small space is demolishd.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a deflection spray head for solving the technical problems that the existing high-pressure water jet spray head cannot crush concrete in a narrow space and cannot hit the concrete behind a steel bar.

The purpose of the invention is realized by the following technical scheme:

the utility model provides a shower nozzle deflects, includes the shower nozzle casing and spouts the core, spout the core install in the shower nozzle casing, it has the runner to spout the interior division of core, the runner is including the tapered throat runner section, corner runner section and the straight section of thick bamboo runner section that connect gradually, the tip of tapered throat runner section with corner runner section is connected.

As an embodiment of the present invention, the nozzle body housing is a straight cylinder, one end of the nozzle body housing is provided with a high-pressure pipe connecting groove, the bottom of the high-pressure pipe connecting groove is provided with a spray core mounting cavity for mounting the spray core, and the nozzle body housing is provided with a nozzle communicating the spray core mounting cavity with the outside of the nozzle body housing; after the spray core is installed, the tapered necking runner section is communicated with the high-pressure pipe connecting groove, and the straight barrel runner section is communicated with the spray nozzle.

As an embodiment of the present invention, an included angle α between a central axis of the straight-tube flow channel section and a central axis of the high-pressure tube connecting groove has a value range of 0 < α ≦ 175 °.

As an embodiment of the present invention, the connection between the tapered necking flow passage section, the corner flow passage section and the straight flow passage section is in smooth transition.

In an embodiment of the present invention, the large end of the tapered flow passage section is in a rounded transition.

In an embodiment of the present invention, the straight cylindrical flow path segment is coaxial with the nozzle, and a radius of the nozzle is not smaller than a radius of the straight cylindrical flow path segment.

As an embodiment of the present invention, a support rod connection groove is formed at an end of the spray head housing away from the high pressure pipe connection groove, and the support rod connection groove may be connected to a support rod.

As an embodiment of the present invention, the nozzle core is made by 3D printing.

The invention has the following beneficial effects:

1. compared with the existing linear spray head, the spray head can change the spraying direction of high-pressure water jet, namely the direction of the sprayed water flow is different from the axial direction of a high-pressure water pipe, so that the aim of striking the concrete behind the reinforcing steel bar can be fulfilled by changing the direction of the water flow;

2. the invention has the scheme that the spray core in the spray head shell is provided with the flow channel with the tapered necking flow channel section, the corner flow channel section and the straight flow channel section, so that the change of the water flow direction can be realized in a narrow space without increasing the volume of the spray head shell, and the spray head can extend into the narrow space to break and dismantle the concrete;

3. in the flow channel arranged in the spray core, the conical necking flow channel section can converge water flow, so that the pressure of the ejected high-pressure water jet can be increased, the direction of the water flow can be changed by the corner flow channel section, and the radius of the straight cylinder flow channel section is constant, so that the direction, the flow speed and the pressure of the ejected water flow can be ensured to be constant, therefore, the spray head can avoid the phenomenon that the ejected water flow is changed into a turbulent state and is prematurely scattered to lose the hitting power while the direction of the water flow is changed in a very small space, so that the ejected high-pressure water jet has high focusing performance and high hitting power, and the concrete can be effectively crushed;

4. the spray core and the spray head shell are combined, and the tapered necking flow passage section for collecting flow and the corner flow passage section for changing the direction are both arranged in the spray core, so that the spray core only needs to be processed with high precision during production and manufacturing, the processing precision requirement of the spray head shell is much lower than that of the spray core, and the combined mode can reduce the whole processing cost due to the small volume of the spray core; and the spray head shell and the spray core can be prepared from different raw materials, and the requirement on the material of the spray head shell is low, so that the material cost can be saved.

Drawings

FIG. 1 is a schematic cross-sectional view of a deflection spray head of the present invention;

FIG. 2 is a schematic cross-sectional view of a spray core of the present invention;

FIG. 3 is a schematic cross-sectional view of a connection structure of a deflection nozzle according to the present invention;

FIG. 4 is a schematic cross-sectional view of another angle-of-deflection showerhead according to the present invention;

FIG. 5 is a side view of an application example;

fig. 6 is a front cross-sectional view of an application example.

The specific structure in the figure illustrates that: 1 spray core, 11 flow channels, 12 taper type necking flow channel sections, 13 corner flow channel sections, 14 straight flow channel sections, 2 spray head shells, 21 high-pressure pipe connecting grooves, 22 spray core mounting cavities, 23 spray nozzles, 24 support rod connecting grooves, 3 high-pressure pipes, 31 sealing rings, 4 support rods, 5 track base plates, 6 track base plates, 7 supporting devices, 8 pre-penetration seams and 9 reinforcing mesh.

Detailed Description

The present invention will be described in further detail with reference to the following examples, which are given in the accompanying drawings.

Referring to fig. 1-2, a deflection nozzle comprises a nozzle shell 2 and a spray core 1, wherein the spray core 1 is installed in the nozzle shell 2, a flow channel 11 is formed in the spray core 1, the flow channel 11 comprises a tapered and reduced flow channel section 12, a corner flow channel section 13 and a straight flow channel section 14 which are sequentially connected, and the small end of the tapered and reduced flow channel section 12 is connected with the corner flow channel section 13. When water flows in, the water flows in from the large end (namely, the end with the larger diameter) of the tapered necking runner section 12, and the cross section area of the tapered necking runner section 12 is gradually reduced, so that the water flow speed is accelerated, and the water pressure is increased; after entering the corner runner section 13, because the corner runner section 13 is a curved channel, the direction of the water flow can be changed under the guidance of the corner runner section 13, and in order to reduce the energy loss of the water flow in the corner runner section 13, the curved position of the corner runner section 13 is preferably in arc transition; then the water flow flows into the straight cylinder flow passage section 14 again, because the radius of the straight cylinder flow passage section 14 is constant, the direction, the flow speed and the pressure of the water flow can be constant through the straight cylinder flow passage section 14, thereby avoiding that the water flow sprayed out after the direction of the water flow is changed into a turbulent flow state and is scattered too early to lose the hitting power, ensuring that the sprayed high-pressure water jet has high focusing performance and high hitting power, and ensuring that the concrete can be effectively crushed.

As an embodiment of the present invention, the nozzle housing 2 is a straight cylinder, one end of the nozzle housing 2 is provided with a high-pressure pipe connecting groove 21, the bottom of the high-pressure pipe connecting groove 21 is provided with a spray core mounting cavity 22 for mounting the spray core 1, and the nozzle housing 2 is internally provided with a nozzle 23 communicating the spray core mounting cavity 22 with the outside of the nozzle housing 2; after the spray core 1 is installed, the tapered necking runner section 12 is communicated with the high-pressure pipe connecting groove 21, and the straight barrel runner section 14 is communicated with the nozzle 23. The structure of the nozzle shell 2 is a straight cylinder, namely the nozzle shell is similar to a conventional straight nozzle, so that the width of the nozzle shell 2 is small, and the nozzle shell can extend into a thin seam between concretes to be broken and dismantled; in order to prevent water leakage, after the high-pressure pipe 3 is installed, a sealing ring 31 is arranged between the front end of the high-pressure pipe 3 and the bottom of the high-pressure pipe connecting groove 21, so that the impact force of water jet flow, which is influenced by water leakage, can be avoided; offer in high-pressure tube connecting groove 21 bottom and spout core installation cavity 22, only need during the installation to pack into and spout core installation cavity 22 with spouting core 1, screw up high-pressure tube 3 again, utilize high-pressure tube 3 to lean on spouting core 1 to fix with spouting the core, this structure easy dismounting, and the installation back simple structure is firm reliable.

As an embodiment of the present invention, an included angle α between the central axis of the straight-tube flow passage section 14 and the central axis of the high-pressure pipe connecting groove 21 is greater than 0 and less than or equal to 175 °. (referring to fig. 3-4, the two deflection nozzles with different deflection angles) are provided, since the high-pressure pipe connecting groove 21 is used for connecting with the high-pressure pipe 3, the high-pressure pipe connecting groove 21 is coaxial with the high-pressure pipe 3 after the high-pressure pipe 3 is connected, the direction of the central axis of the straight cylinder flow passage section 14 is the direction of the ejected water flow, and therefore α is the water jet deflection angle. In the using process, for concrete buildings for breaking different structures, the angle of the water jet deflection angle possibly required can be different, so that under the teaching of the invention, in the actual using process, a person skilled in the art can set a deflection spray head with the appropriate angle of the water jet deflection angle alpha according to the actual requirement.

In one embodiment of the present invention, the junctions between the tapered and necked-down flow passage sections 12, the corner flow passage section 13 and the straight flow passage section 14 are smoothly transited. The joints between the flow channel sections are in smooth transition, so that energy loss caused by impact of water flow at the joints between the flow channel sections can be avoided.

In an embodiment of the present invention, the large end of the tapered flow passage section 12 is rounded. The big end of the tapered necking runner section 12 is one end connected with the high-pressure pipe 3, and the fillet is processed in a transition mode, so that the fillet can play a role in drainage, and the energy loss of water flow generated when the high-pressure pipe 3 is transited to the spray core 1 can be reduced.

In an embodiment of the present invention, the straight-tube flow path section 14 is coaxial with the nozzle 23, and a radius of the nozzle 23 is not smaller than a radius of the straight-tube flow path section 14. With this arrangement, the water jet does not strike the side wall of the nozzle 23 when being ejected, and therefore the striking energy of the water jet is not affected.

In an embodiment of the present invention, a support rod connection groove 24 is formed at an end of the spray head housing 2 away from the high pressure pipe connection groove 21, and the support rod connection groove 24 may be connected to the support rod 4. Referring to fig. 3 to 4, after the water jet is ejected, the reaction force f of the water jet on the nozzle is opposite to the ejection direction of the water jet. In the conventional linear spray head, the spraying direction of the water jet is positioned on the same straight line with the axis of the high-pressure pipe, so that the reaction force of the water jet on the spray head is positioned on the axis of the high-pressure pipe, and the high-pressure pipe cannot be bent by impact. However, in the deflection nozzle of the present invention, the direction of the jet of water is not aligned with the axis of the high-pressure pipe 3, so that the reaction force f of the jet of water against the nozzle gives a lateral thrust to the nozzle and the high-pressure pipe, and the high-pressure pipe 3 may be bent by impact. Therefore, the other end of the nozzle shell 2 is connected with the support rod 4, and the two ends of the nozzle shell are respectively supported by the high-pressure pipe 3 and the support rod 4, so that the transverse thrust received by the high-pressure pipe 3 can be reduced under the auxiliary support of the support rod 4, and the bending deformation of the high-pressure pipe 3 caused by impact can be avoided. Of course, under the condition that the auxiliary supporting rod 4 cannot be added, the supporting rod 4 is not needed, and the strength of the high-pressure pipe 3 is only required to be improved so as to improve the bending resistance.

As an embodiment of the present invention, the nozzle core 1 is made by 3D printing. The processing precision requirement of the runner 1 in the spray core 1 is high, the processing difficulty is high, the runner is difficult to process by adopting a conventional machining mode, the spray core 1 is arranged in the spray head shell 2, and the periphery of the spray core is supported by the spray head shell 2 in an enclosing manner, so that the strength requirement of the spray core 1 is not high, the spray core 1 suitable for the use function of the invention can be quickly printed by adopting 3D printing, the processing difficulty is reduced, and the processing cost is saved.

To help understand the usage and application effect of the embodiment, an application example is listed below to help understand, and it should be noted that the scope of the present invention is not limited to the application scenario exemplified by the application example.

Application example:

referring to fig. 5-6, in a ballastless track for running high-speed rails, the ballastless track comprises a track base plate 6 and a track base plate 5 for supporting the track base plate 6, during the use of the track, the track base plate 6 or the track base plate 5 may have a certain running safety hazard due to the fact that a crack may be generated in the track base plate 6 or the track base plate 5, and therefore concrete at the crack needs to be crushed and then grouted again. In order to ensure that the re-grouted concrete can be firmly combined on the track structure, part of the concrete on the original track base plate 6 and the original track base plate 5 needs to be broken, so that the reinforcing mesh in the concrete is exposed, and the re-grouted concrete can be combined with the original reinforcing mesh.

Keep off track backing plate 6's lower surface or track bed plate 5 when the crack appears, need pour again after the original concrete is broken, because 6 superstructure of track backing plate does not appear the disease, can also normally lead to the car on the track this moment, and among the broken technique of current conventional concrete, generally can only follow the follow and down abolishes, pours again after breaking 6 structures of whole track backing plate promptly, will lead to the fact the influence to orbital normal traffic at this moment so. If the existing linear high-pressure water jet technology is adopted, local concrete can be broken from cracks at the lower part of the track base plate, but due to the blocking of the reinforcing mesh 9 in the track base plate 6, a high-pressure water jet gun cannot penetrate through the reinforcing mesh to break the concrete in the reinforcing mesh, and the purpose of breaking cannot be met.

In this regard, the application of the deflection nozzle of the present invention to this scenario may better address this issue. The specific breaking mode is as follows:

referring to fig. 5-6, a pre-perforated seam 8 which transversely penetrates through a track is firstly broken at the joint of a track base plate 6 and a track base plate 5 (without a dense reinforcing mesh) by using the existing breaking technology, the breaking mode can adopt the existing linear high-pressure water jet or other alternative modes, the height of the pre-perforated seam 8 is required to allow a high-pressure pipe 3 and a spray head shell 2 to freely pass through, then the high-pressure pipe 3 with a deflection spray head is penetrated into the pre-perforated seam 8, and the spraying direction of the deflection spray head faces to the upper surface or the lower surface of the pre-perforated seam 8, so that the concrete breaking operation can be carried out on the track base plate 6 or the track base plate 5. In the process of breaking the concrete, because the pre-perforated seam 8 is not blocked by the reinforcing mesh 9, the high-pressure pipe 3 can drive the deflection spray head to freely move in the pre-perforated seam 8, and the deflection spray head carries out spraying and breaking operation towards the concrete with the reinforcing mesh 9, so that the concrete in the reinforcing mesh 9 can be broken, and part of the reinforcing mesh 9 is exposed. After the crushing is finished, the new concrete can be firmly combined with the original structure after the grouting is carried out again.

In the process of crushing by using the deflection nozzle, one end of the deflection nozzle is connected with the high-pressure pipe 3, one end of the deflection nozzle is connected with the supporting rod 4, and the two sides of the pre-penetration seam 8 are respectively provided with the supporting devices 7 for supporting the high-pressure pipe 3 and the supporting rod 4, so that the high-pressure water jet can stably crush the concrete. In order to complete the full-area crushing, the deflecting spray head may need to move transversely, longitudinally or rotate in the crushing process, and the deflecting spray head can be moved by a person skilled in the art according to actual needs to complete the full-area crushing operation.

The above description is only a preferred embodiment of the present invention, but not intended to limit the scope of the invention, and all simple equivalent changes and modifications made in the claims and the description of the invention are within the scope of the invention.