CN219444780U - Split type mixed flow pipe and sand blasting gun - Google Patents
Split type mixed flow pipe and sand blasting gun Download PDFInfo
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- CN219444780U CN219444780U CN202320080176.7U CN202320080176U CN219444780U CN 219444780 U CN219444780 U CN 219444780U CN 202320080176 U CN202320080176 U CN 202320080176U CN 219444780 U CN219444780 U CN 219444780U
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Abstract
The utility model relates to the technical field of sand blasting, and particularly discloses a split type mixed flow pipe and a sand blasting gun. The split type mixed flow pipe comprises an inlet section mixed flow pipe and an outlet section mixed flow pipe which are coaxially arranged along the axial direction, the mutually adjacent end surfaces of the inlet section mixed flow pipe and the outlet section mixed flow pipe are attached, and the length of the inlet section mixed flow pipe is smaller than that of the outlet section mixed flow pipe; the split type mixed flow pipe of the second scheme is formed by splicing at least two mixed flow pipe units along the circumferential direction, the mixed flow pipe units are provided with two joint surfaces and an open type mixed flow groove which is arranged between the two joint surfaces and penetrates through the mixed flow pipe units along the axial direction, and mixed flow grooves of all the mixed flow pipe units are spliced to form a mixed flow pipe inner cavity. The split type mixed flow pipe with the structure solves the defects that an integral mixed flow pipe in the prior art is easy to jump and break and easy to wear, remarkably prolongs the service life of the mixed flow pipe, and reduces the cost of the mixed flow pipe.
Description
Technical Field
The utility model relates to the technical field of sand blasting, in particular to a split type mixed flow pipe and a sand blasting gun.
Background
The sand blasting gun adopts compressed air as power, accelerates the compressed air by using a Laval principle, ejects the sprayed material (copper ore sand, quartz sand, iron sand, sea sand, silicon carbide and the like) by using a Venturi negative pressure adsorption principle, so that the air and the sand flow are mixed, and the air and the sand flow are sprayed to the surface of a workpiece to be treated through a mixing pipe at high speed, and rust, stains and the like on the surface of the workpiece are removed due to the impact and cutting action of the high-speed sand flow on the surface of the workpiece.
Fig. 1 is a sand blasting gun in the prior art, which mainly comprises a gun body 1, a sand inlet pipe 2, an air inlet pipe 3, a speed increasing spray head 4, a mixed flow pipe 5 and a protective sleeve 6. The gun body 1 is of a Y-shaped structure, an air inlet pipe 3 is connected in the axis direction of a central line of an inlet section, a sand inlet pipe 2 is connected to a cavity of the inlet section at a certain angle with a central axis, a speed increasing spray head 4 is arranged in the central area of the gun body 1 and connected with the air inlet pipe 3, a protective sleeve 6 is connected to an outlet section of the gun body 1, a mixed flow pipe 5 is arranged in an inner cavity of the protective sleeve 6, and axes of the mixed flow pipe 5, the speed increasing spray head 4 and the air inlet pipe 3 are coincident.
During operation, high-pressure compressed air enters the air inlet pipe 3, is sprayed through the Laval acceleration effect of the acceleration nozzle 4, the spraying airflow speed exceeds the local sonic speed, and as the high-speed airflow passes through the center of the gun body 1, the inner cavity of the sand inlet pipe 2 forms negative pressure to adsorb and jet sand materials, so that the sand materials flow into the sand inlet pipe 2, the sand flow is gradually accelerated in the inner cavity of the gun body 1, a sand flow field 21 is formed in the center of the gun body 1, the sand flow field 21 and the airflow field 31 are intersected at the inlet 511 of the mixed flow pipe, a gas-sand mixed flow is formed at the throat 512 of the mixed flow pipe, a gas-sand mixed flow 53 is formed in the middle of the inner cavity of the mixed flow pipe 5, and the high-speed air is sprayed outwards to the surface of a workpiece to be processed.
The sand blasting gun with the structure has the following technical defects:
(1) A common material for the mixing tube 5 is boron carbide or quenched steel. The boron carbide material is hard and brittle, and is easy to break at the inlet 511 of the mixed flow pipe and is easy to wear at the throat 512 of the mixed flow pipe under the impact of a high-speed sand flow field. The toughness of the quenched steel material is better than that of boron carbide, and the quenched steel material is difficult to break, but has lower hardness than that of the boron carbide material, is easy to wear under the impact of a high-speed sand flow field, and is easy to rust especially under the condition of wet spraying. As is well known, the size and shape parameters of the inlet of the mixed flow pipe and the throat of the mixed flow pipe are designed in a matched manner with those of the accelerating spray head, when the size and shape of the inlet of the mixed flow pipe and the throat of the mixed flow pipe are changed due to damage or abrasion, the negative pressure formed by an airflow field can be reduced, the injection effect on sand flow is reduced, the injection speed of the air-sand mixed flow is reduced, and the sand blasting effect and efficiency are affected.
(2) In order to achieve both hardness and wear characteristics, solutions known to those skilled in the art generally include:
firstly, hardening a metal material by heat treatment, and coating a wear-resistant layer on the surface. However, since the above-mentioned mixed flow pipe 5 is an elongated member, the inner cavity of the mixed flow pipe 3 is an elongated hole, and the ratio of the length to the inner diameter of the elongated hole is generally greater than 2, it is difficult to uniformly coat the wear-resistant layer on the inner surface of the elongated hole by the prior art process.
Secondly, the mixed flow pipe 5 is made of high-hardness and high-wear-resistance materials, such as high-speed steel materials of SKH9, M42, PM60 and the like. However, the price of the above materials is relatively high, which results in a significant increase in the cost of the mixing tube 5, and is not an optimal choice for the user.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a split type mixed flow pipe which is applied to a sand blasting machine to solve the corresponding technical defects in the prior art.
In order to solve the technical problems, the first technical scheme provided by the utility model is as follows: the utility model provides a split type mixed flow pipe, includes the entrance section mixed flow pipe and the exit section mixed flow pipe of following the coaxial setting of axial, the terminal surface laminating that entrance section mixed flow pipe and exit section mixed flow pipe adjoined each other, entrance section mixed flow pipe's length is less than exit section mixed flow pipe's length, entrance section mixed flow pipe has set gradually mixed flow pipe entry, mixed flow pipe throat and entrance section mixed flow hole along axial direction, exit section mixed flow pipe has set gradually exit section mixed flow hole and exit section expansion hole along axial direction.
In a preferred embodiment, the inlet section mixed flow pipe is made of metal, is hardened through heat treatment, and is coated with a wear-resistant layer on the surface.
In a preferred embodiment, the material of the inlet section mixed flow pipe is any one of Cr12, cr12MoV, cr12W, DC or W18Cr4V, the hardness reaches more than HRC58 through heat treatment quenching treatment, and the wear-resistant layer is any one of a nitriding layer, a carbonitriding layer, a titanium compound layer or a diamond-like coating.
In a preferred embodiment, the wear-resistant layer is any one of a nitrided layer, a carbonitriding layer, a titanium compound layer or a diamond-like coating.
In a preferred embodiment, the axial length of the inlet section mixed flow pipe is L, and the outer diameter of the inlet section mixed flow pipe is D, wherein L: d is less than 2.
In a preferred embodiment, the inlet section mixed flow pipe is made of high-hardness and high-wear-resistance materials.
In a preferred embodiment, the material of the inlet section mixed flow pipe is any one of SKH9, M42 or PM 60.
In a preferred embodiment, the outer wall of the inlet section mixed flow pipe and the outer wall of the outlet section mixed flow pipe are both provided with positioning grooves.
In this scheme, split type mixed flow pipe includes the entrance section mixed flow pipe and export section mixed flow pipe of following axial coaxial setting, and wherein, the length of entrance section mixed flow pipe is shorter, can adopt only to carry out the mode of strengthening to the hardness and the wearability of entrance section mixed flow pipe to promote and improve mixed flow pipe's life, compare with prior art, have following beneficial effect:
(1) When the inlet mixed flow pipe is made of metal, hardening can be carried out through heat treatment, and the surface of the inlet mixed flow pipe is coated with the wear-resistant layer, and the wear-resistant layer coating process in the prior art is sufficient for realizing uniformity of the wear-resistant layer due to the short length of the inlet mixed flow pipe.
(2) The inlet section mixed flow pipe can also be made of high-hardness and high-wear-resistance materials, and because the length of the inlet section mixed flow pipe is short, compared with the whole mixed flow pipe made of high-hardness and high-wear-resistance materials, the cost is greatly reduced, and the inlet section mixed flow pipe is more easily accepted by users.
(3) Because the inlet section mixed flow pipe is directly impacted by the high-speed sand flow, even if the inlet section mixed flow pipe is damaged or worn, only the inlet section mixed flow pipe can be replaced, and the outlet section mixed flow pipe can be continuously used, so that the replacement cost is remarkably reduced.
The second technical scheme provided by the utility model is as follows: the split type mixed flow pipe is formed by splicing at least two mixed flow pipe units along the circumferential direction, wherein each mixed flow pipe unit is provided with two joint surfaces and an open type mixed flow groove which is arranged between the two joint surfaces and penetrates through the mixed flow pipe units along the axial direction, and the mixed flow grooves of all the mixed flow pipe units are spliced to form a mixed flow pipe inner cavity; the mixed flow pipe unit is made of metal, hardening is carried out through heat treatment, and the surface of the mixed flow pipe unit is coated with a wear-resistant layer.
In a preferred embodiment, the material of the mixed flow pipe unit is any one of Cr12, cr12MoV, cr12W, DC or W18Cr4V, the hardness reaches HRC58 or more by quenching treatment through heat treatment, and the wear-resistant layer is any one of a nitriding layer, a carbonitriding layer, a titanium compound layer or a diamond-like coating.
In a preferred embodiment, the mixed flow groove includes an inlet groove, a throat groove, an equal-diameter groove, and an expansion groove in this order in the axial direction.
In a preferred embodiment, the outer wall of the mixed flow pipe unit is provided with a positioning groove.
In this scheme, split type mixed flow pipe is formed by two at least mixed flow pipe units along the circumferencial direction amalgamation, compares with prior art. Has the following beneficial effects:
when the metal material is adopted, the surface of the split type mixed flow pipe is hardened through heat treatment, and the abrasion-resistant layer is coated on the surface of the split type mixed flow pipe, because the mixed flow pipe unit is an open mixed flow groove and is not an elongated hole, the abrasion-resistant layer coating process in the prior art is sufficient for realizing the uniformity of the abrasion-resistant layer, so that the integral cost of the split type mixed flow pipe is lower, and the service life of the split type mixed flow pipe is longer.
Drawings
FIG. 1 is a schematic view of a prior art sand blasting gun;
FIG. 2 is a schematic view of a sand blasting gun according to the first embodiment;
FIG. 3 is a schematic view showing the external structure of a mixed flow pipe at the inlet section in the first embodiment;
FIG. 4 is a left side view of the inducer mixing tube of FIG. 3;
FIG. 5 is a cross-sectional view A-A of the inducer mixing tube of FIG. 3;
FIG. 6 is a schematic view showing the external structure of an outlet section mixing pipe in the first embodiment;
FIG. 7 is a B-B cross-sectional view of the outlet section mixing tube of FIG. 6;
FIG. 8 is a schematic view of a sand blasting gun according to a second embodiment;
FIG. 9 is a C-C cross-sectional view of the gun of FIG. 8;
FIG. 10 is a schematic view of the external structure of a split-type mixing tube in the second embodiment;
FIG. 11 is a left side view of the split mixing tube of FIG. 10;
fig. 12 is a schematic structural diagram of a mixed flow pipe unit in the second embodiment.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, integrally connected, or detachably connected; may be a communication between the interiors of two elements; may be directly or indirectly through an intermediate medium, and the specific meaning of the terms in the present utility model will be understood by those skilled in the art in specific cases.
Example 1
The sand blasting gun of the embodiment, as shown in fig. 2, mainly comprises a gun body 1, a sand inlet pipe 2, an air inlet pipe 3, a speed increasing spray head 4, a mixed flow pipe 5 and a protective sleeve 6. The gun body 1 is of a Y-shaped structure, an air inlet pipe 3 is connected in the axis direction of a central line of an inlet section, a sand inlet pipe 2 is connected to a cavity of the inlet section at a certain angle with a central axis, a speed increasing spray head 4 is arranged in the central area of the gun body 1 and connected with the air inlet pipe 3, a protective sleeve 6 is connected to an outlet section of the gun body 1, a mixed flow pipe is arranged in an inner cavity of the protective sleeve 6, and axes of the mixed flow pipe, the speed increasing spray head 4 and the air inlet pipe 3 are coincident.
As a feature of this embodiment, the mixing pipe is a split mixing pipe, and includes an inlet-section mixing pipe 51 and an outlet-section mixing pipe 52 coaxially disposed along the axial direction, end surfaces of the inlet-section mixing pipe 51 and the outlet-section mixing pipe 52 adjacent to each other are attached, and the length of the inlet-section mixing pipe 51 is smaller than the length of the outlet-section mixing pipe 52.
As shown in fig. 2, 3 and 6, the outer walls of the inlet section mixed flow pipe 51 and the outer wall of the outlet section mixed flow pipe 52 are respectively provided with a positioning groove 54, after the screw 7 penetrates through the outer wall of the protective sleeve 6, the end surface of the screw 7 is attached to the positioning groove 54, so that the inlet section mixed flow pipe 51 and the outlet section mixed flow pipe 52 are prevented from moving in the axial direction and the radial direction, the coaxiality of the inlet section mixed flow pipe 51 and the outlet section mixed flow pipe 52 is ensured, and the attaching degree of the end surfaces of the inlet section mixed flow pipe 51 and the outlet section mixed flow pipe 52 adjacent to each other is ensured.
As shown in fig. 3 to 5, the inlet section mixed flow pipe 51 of the present embodiment is provided with a mixed flow pipe inlet 511, a mixed flow pipe throat 512, and an inlet section mixed flow hole 513 in this order in the axial direction.
As a possible implementation manner of this embodiment, the inlet section mixing pipe 51 is made of a metal material, for example, any one of Cr12, cr12MoV, cr12W, DC53, or W18Cr 4V. The above materials are used in the art by the brand name. In addition, the materials listed above are not limited to the present application, and other materials having corresponding characteristics can be used in the present embodiment.
The inlet mixed flow pipe 51 made of the metal material is quenched by heat treatment until the hardness reaches more than HRC58, and after hardening, the surface of the inlet mixed flow pipe 51 is coated with a wear-resistant layer. The wear-resistant layer commonly used in the prior art may be a nitride layer, a carbonitriding layer, a titanium compound layer, a DLC (diamond like carbon) layer, or the like, and of course, the wear-resistant layer described in this embodiment is not limited to the above examples, and other possible wear-resistant layers may be applied in this embodiment.
In this embodiment, since the inlet section mixed flow pipe 51 has a short length, and is not an elongated component, the existing mature wear-resistant layer coating process can realize uniform coating of the wear-resistant layer. Preferably, in this embodiment, the axial length of the inlet section mixing pipe 51 is L, and the outer diameter is D, where L: d is less than 2.
In the present embodiment, since the inlet mixed flow pipe 51 receives direct impact of the high-speed sand flow, even if breakage or abrasion occurs, only the inlet mixed flow pipe can be replaced, and the outlet mixed flow pipe is continued to be used, so that replacement cost is remarkably reduced.
As another possible implementation manner of this embodiment, the inducer mixed flow pipe is made of a high-hardness and high-wear-resistance material, for example, the inducer mixed flow pipe is made of high-speed steel materials such as SKH9, M42, PM60, etc. Although the high-speed steel material has higher cost, the length of the inlet section mixed flow pipe 51 is shorter, so that the cost is remarkably reduced compared with the traditional integrated mixed flow pipe which integrally adopts the high-speed steel material, and the cost requirement of a user can be met.
As shown in fig. 6 to 7, the outlet-stage mixed flow pipe 52 in the present embodiment is provided with an outlet-stage mixed flow hole 521 and an outlet-stage expansion hole 522 in order in the axial direction. Since the inlet section mixed flow pipe 51 receives direct impact of high-speed sand flow, and the outlet section mixed flow pipe 52 receives very small impact of sand flow, the requirements of the outlet section mixed flow pipe 52 on hardness and wear resistance are far lower than those of the inlet section mixed flow pipe 51, and the cost can be controlled to be lower. The adoption of the split-type mixed flow pipe reduces the overall cost obviously.
Preferably, in this embodiment, the material of the protective sleeve 6 is polyurethane.
It should be noted that, the cross-section of the inner hole of the split-type mixed flow pipe may be circular or shaped, which is not limited in this embodiment.
Example two
As shown in fig. 8 to 12, the split type mixed flow pipe of the present embodiment is different from the first embodiment in that it is formed by splicing two mixed flow pipe units 501, 502. As shown in fig. 10 to 12, taking the mixed flow pipe unit 501 as an example, two joint surfaces 505 and an open mixed flow groove that is disposed between the two joint surfaces 505 and penetrates the mixed flow pipe unit 501 in the axial direction are provided, where the mixed flow groove sequentially includes an inlet groove 506, a throat groove 507, an equal diameter groove 503 and an expansion groove 504 in the axial direction. After the two mixing pipe units 501 and 502 are spliced, the mixing grooves of all the mixing pipe units are spliced to form a mixing pipe inner cavity 55.
In this embodiment, the outer walls of the mixed flow pipe units 501 and 502 are provided with positioning grooves 54, as shown in fig. 8, after the screw 7 penetrates through the outer wall of the protective sleeve 6, the end surface of the screw 7 is attached to the positioning grooves 54, so as to prevent the mixed flow pipe units 501 and 502 from moving in the axial direction and the radial direction, and ensure the attachment degree between the attachment surfaces 505 of the mixed flow pipe units 501 and 502.
In this embodiment, the mixed flow pipe unit is made of metal, for example, any one of Cr12, cr12MoV, cr12W, DC, or W18Cr 4V. The above materials are used in the art by the brand name. In addition, the materials listed above are not limited to the present application, and other materials having corresponding characteristics can be used in the present embodiment.
The inlet section mixed flow pipe 51 made of the metal material is quenched by heat treatment until the hardness reaches more than HRC58, and after hardening, the surface of the mixed flow pipe unit is coated with a wear-resistant layer. Preferably, the wear-resistant layer commonly used in the prior art may be a nitride layer, a carbonitriding layer, a titanium compound layer, a DLC (diamond like carbon) coating, or the like, and of course, the wear-resistant layer described in the present embodiment is not limited to the above example, and other possible wear-resistant layers may be applied in the present embodiment.
In this embodiment, since the mixed flow pipe unit is an open mixed flow groove, and is not an elongated hole, the wear-resistant layer coating process in the prior art is sufficient to achieve uniformity of the wear-resistant layer, so that the cost of the whole split mixed flow pipe is lower, and the service life is longer.
In this embodiment, the split-type mixed flow pipe is formed by splicing two mixed flow pipe units 501 and 502. As a possible embodiment, the number of the mixed flow pipe units may be more than two, and the split mixed flow pipe may be formed by splicing three or more mixed flow pipe units in the circumferential direction.
In summary, the foregoing description is only of the preferred embodiments of the utility model, and is not intended to limit the utility model to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.
Claims (12)
1. The utility model provides a split type mixed flow pipe, its characterized in that includes entrance mixed flow pipe (51) and exit section mixed flow pipe (52) that set up along axial coaxial, the terminal surface laminating that entrance mixed flow pipe (51) and exit section mixed flow pipe (52) adjoined each other, the length of entrance mixed flow pipe (51) is less than the length of exit section mixed flow pipe (52), entrance mixed flow pipe (51) have set gradually mixed flow pipe entry (511), mixed flow pipe throat (512) and entrance mixed flow hole (513) along axial direction, exit section mixed flow pipe (52) have set gradually exit section mixed flow hole (521) and exit section expansion hole (522) along axial direction.
2. The split type mixing pipe according to claim 1, wherein the inlet section mixing pipe is made of metal, hardening is performed through heat treatment, and the surface of the inlet section mixing pipe is coated with a wear-resistant layer.
3. The split type mixed flow pipe according to claim 2, wherein the material of the inlet section mixed flow pipe is any one of Cr12, cr12MoV, cr12W, DC53 or W18Cr4V, the hardness reaches more than HRC58 through heat treatment quenching treatment, and the wear-resistant layer is any one of a nitriding layer, a carbonitriding layer, a titanium compound layer or a diamond-like coating.
4. The split mixing tube of claim 2, wherein the inlet section mixing tube has an axial length L and an outer diameter D, wherein L: d is less than 2.
5. The split mixing tube of claim 1, wherein the inducer mixing tube is a high hardness, high wear resistant material.
6. The split manifold of claim 5, wherein the inlet manifold is any one of SKH9, M42, or PM 60.
7. The split mixing tube of any one of claims 1-6, wherein the outer wall of the inlet section mixing tube and the outer wall of the outlet section mixing tube are each provided with a positioning groove (54).
8. The split type mixed flow pipe is characterized by being formed by splicing at least two mixed flow pipe units along the circumferential direction, wherein the mixed flow pipe units are provided with two joint surfaces (505) and an open mixed flow groove which is arranged between the two joint surfaces and penetrates through the mixed flow pipe units along the axial direction, and mixed flow grooves of all the mixed flow pipe units are spliced to form a mixed flow pipe inner cavity (55); the mixed flow pipe unit is made of metal, hardening is carried out through heat treatment, and the surface of the mixed flow pipe unit is coated with a wear-resistant layer.
9. The split type mixed flow pipe according to claim 8, wherein the mixed flow pipe unit is made of any one of Cr12, cr12MoV, cr12W, DC53 or W18Cr4V, and is quenched by heat treatment until the hardness reaches more than HRC58, and the wear-resistant layer is any one of a nitriding layer, a carbonitriding layer, a titanium compound layer or a diamond-like coating.
10. The split-type flow mixing tube according to claim 8, wherein the flow mixing groove comprises an inlet groove (506), a throat groove (507), an equal diameter groove (503), and an expansion groove (504) in this order in the axial direction.
11. The split mixing tube of claim 8, wherein the outer wall of the mixing tube unit is provided with a positioning groove (54).
12. A sand blasting gun at least comprising a gun body (1), a sand inlet pipe (2), an air inlet pipe (3), a speed increasing spray head (4), a mixed flow pipe (5) and a protective sleeve (6), wherein the mixed flow pipe (5) adopts the split mixed flow pipe according to any one of claims 1-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320080176.7U CN219444780U (en) | 2023-01-13 | 2023-01-13 | Split type mixed flow pipe and sand blasting gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320080176.7U CN219444780U (en) | 2023-01-13 | 2023-01-13 | Split type mixed flow pipe and sand blasting gun |
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| Publication Number | Publication Date |
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| CN219444780U true CN219444780U (en) | 2023-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320080176.7U Active CN219444780U (en) | 2023-01-13 | 2023-01-13 | Split type mixed flow pipe and sand blasting gun |
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| CN (1) | CN219444780U (en) |
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- 2023-01-13 CN CN202320080176.7U patent/CN219444780U/en active Active
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