Asymmetric biradial suction type high-performance liquid sand blasting gun

Abstract

The utility model relates to the field of surface sand blasting, and particularly discloses an asymmetric double-radial suction type high-performance liquid sand blasting gun which at least comprises an expansion injection pipe, an air inlet channel, a mixing cavity, a first sand inlet channel and a second sand inlet channel, the first sand inlet channel is communicated to the mixing cavity at a first inclination angle with the axis, and the second sand inlet channel is communicated to the mixing cavity at a second inclination angle with the axis. The second sand inlet channel is communicated to the mixing cavity at a second inclination angle with the axis; wherein a first sand inlet communicated with the first sand inlet channel and a second sand inlet communicated with the second sand inlet channel are formed in the mixing cavity, and the first sand inlet is closer to the expansion injection pipe than the second sand inlet. According to the result, the two asymmetric sand inlet channels are arranged, the suction force of the two sand inlet channels is different, a main sand inlet channel and an auxiliary sand inlet channel are formed, mortar with different sand-water ratios is mixed again after entering the mixing cavity, the sand-water ratio can be balanced, the sand production amount of the expansion injection pipe is more stable, and the sand blasting cutting capacity is higher.

Description

Technical Field

[0001] The utility model relates to the field of surface sandblasting, is suitable for pretreatment of wires and other surface spraying projects, and specifically relates to an asymmetric double radial suction type high-performance liquid sandblasting gun. Background Art

[0002] Pneumatic sandblasting technology is a technology that uses compressed air as a power source to mix with mortar to form a sandblasting jet. This technology has begun to be valued and applied in the pretreatment of coating surface engineering, etc. The sand pipe access form in liquid sandblasting equipment can be divided into radial sand suction and axial sand suction.

[0003] like Figure 1 As shown, in an existing radial suction sandblasting gun, high-pressure gas enters the speed-increasing tube 1-4 axially from the air pipe joint 1-3, and the high-speed gas jet formed by the speed-increasing tube enters the mixing chamber of the sandblasting gun body, and a vacuum is formed in the radial sand inlet pipe 1-2, and the mortar formed by the mixture of water and sand in the sand bucket is sucked into the mixing chamber through the sand pipe joint 1-1, and the high-speed jet is used as kinetic energy, and is accelerated again through the nozzle 1-5 and sprayed on the surface of the workpiece to achieve a pretreatment effect.

[0004] The defects of the above radial suction sandblasting gun include: 1. The sealing of the sand suction tube is poor, and the vacuum degree in the cavity is unstable, resulting in more water and less sand when sucking sand, and a low sand-to-water ratio; 2. Before entering the mixing chamber, there is an angle between the radial suction and the axis, which affects the smoothness of the channel; 3. When the high-speed gas is mixed with the mortar, the kinetic energy is reduced due to the existence of three forms of gas, water and solid, and the cutting ability is general, and it is used in manual or semi-automatic production.

[0005] like Figure 2 As shown, in an existing axial suction sandblasting gun, high-pressure gas radially enters the air inlet pipe 2-2 from the air pipe joint 2-1, and a conical surface is designed on the end face of the sand inlet pipe 2-4 to form an annular speed-increasing structure with the inlet end of the speed-increasing pipe 2-6, so as to increase the air flow velocity in the speed-increasing pipe 2-6, and at the same time, a vacuum is formed in the axial sand inlet pipe 2-4, and the water and sand in the sand bucket are sucked into the sand inlet pipe 2-4 through the sand pipe joint 2-3. After entering the speed-increasing pipe, the mortar is mixed with the air flow to form a sand, water and gas mixed jet, which is sprayed on the surface of the workpiece to achieve a pretreatment effect.

[0006] The above axial sand feeding structure solves the problem Figure 1 The radial sand inlet mixing chamber shown in the figure has problems such as the unsmooth sand path caused by the angle between the radial suction and the axis. However, the annular speed increaser has a much worse effect on the gas speed increase, and it is difficult to form a high-speed jet. The surface treatment degradation is far inferior to the radial sand suction, and it is mainly used in occasions where the sand blasting efficiency and effect are not required to be high.

[0007] In addition, Chinese utility model patent CN219426570U discloses an abrasive water jet nozzle having two mortar inlet channels. However, the two mortar inlet channels are symmetrically designed without distinction between the main and auxiliary channels, and still have the defects of low mortar sand-water ratio and easy blockage of the sand inlet channels. Summary of the invention

[0008] The technical problem to be solved by the utility model is to provide an asymmetric double radial suction type high-performance liquid sandblasting gun, which has the technical advantages of good sand suction stability, high sand-to-water ratio and significant improvement on the problem of easy blockage of the sand inlet channel.

[0009] In order to solve the above technical problems, the technical solution provided by the utility model is as follows: an asymmetric double radial suction type high performance liquid sandblasting gun, comprising at least:

[0010] expansion jet pipe;

[0011] An air intake passage, wherein the air intake passage is coaxially arranged with the expansion injection pipe, an air intake pipe is arranged at one end of the air intake passage, and a speed increasing pipe is arranged at one end close to the expansion injection pipe;

[0012] A mixing chamber, the mixing chamber is located between the expansion injection pipe and the speed increasing pipe;

[0013] a first sand inlet channel, the first sand inlet channel being connected to the mixing chamber at a first inclination angle with the axis;

[0014] a second sand inlet passage, the second sand inlet passage being connected to the mixing chamber at a second inclination angle with the axis;

[0015] Wherein, a first sand inlet communicating with the first sand inlet channel and a second sand inlet communicating with the second sand inlet channel are arranged in the mixing chamber, and the first sand inlet is closer to the expansion injection pipe than the second sand inlet.

[0016] In a preferred embodiment, the inner diameter of the first sand feeding channel is greater than the inner diameter of the second sand feeding channel.

[0017] In a preferred embodiment, the first inclination angle is greater than the second inclination angle.

[0018] In a preferred embodiment, the inlet end of the first sand inlet channel and / or the second sand inlet channel is flexibly sealed and connected to the sand inlet pipe via a sand pipe joint and a T-shaped sealing ring.

[0019] In a preferred embodiment, an inlet end of the first sand inlet channel and / or the second sand inlet channel is provided with an internal thread interface, and a step surface is provided at the bottom of the internal thread interface.

[0020] In a preferred embodiment, the sand pipe joint is provided with an axially through-going connection hole, the inner diameter of the connection hole is larger than the outer diameter of the sand inlet pipe, one end of the sand pipe joint is provided with an external threaded joint adapted to be screwed with the internal threaded interface, and the end of the sand pipe joint away from the external threaded joint is provided with a bearing portion for bearing the screwing force applied to the sand pipe joint.

[0021] In a preferred embodiment, the T-shaped sealing ring includes an axial sealing section and an annular convex portion arranged at one end of the axial sealing section, the axial sealing section is provided with an axially through-going sealing hole, one end of the sand inlet pipe is inserted into the sealing hole and has an interference fit with the sealing hole, and the annular convex portion is clamped between the end face of the external threaded joint and the step surface.

[0022] Compared with the prior art, the asymmetric dual radial suction high-performance liquid sandblasting gun of this embodiment has the following beneficial effects:

[0023] (1) Two sand inlet channels are set, and the distances between the two sand inlet channels and the expansion jet pipe are different. The asymmetric design makes the suction of the two sand inlet channels different, forming a main and an auxiliary sand inlet channel. The mortars with different sand-to-water ratios are mixed again after entering the mixing chamber, which can balance the sand-to-water ratio, making the sand output of the expansion jet pipe more stable and the sandblasting cutting ability stronger.

[0024] (2) The inner diameter of the first sand inlet channel is larger than the inner diameter of the second sand inlet channel, which further increases the suction difference between the main and auxiliary channels, prioritizes sand inlet into the main channel, and improves the sand-to-water ratio.

[0025] (3) The first inclination angle α is greater than the second inclination angle β. The smaller the axial inclination angle of the auxiliary channel is and the closer it is to the axis, the better the acceleration performance of the auxiliary channel is. When the main channel is blocked, the vacuum suction of the auxiliary channel increases and the flow rate accelerates, which is conducive to flushing the sand blockage in the main pipeline, thereby improving the technical problem of easy blockage of the main channel.

[0026] (4) The sand inlet pipe is flexibly sealed to the first sand inlet channel and the second sand inlet channel. In different working conditions, the angle of the sand inlet pipe can be swung at will without any sealing problems, which can better adapt to the working environment of the automated production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an existing radial suction sandblasting gun;

[0028] Figure 2 It is a structural schematic diagram of an existing axial suction type sandblasting gun;

[0029] Figure 3 This is a schematic diagram of the structure of the asymmetric double radial suction high-performance liquid sandblasting gun of this embodiment;

[0030] Figure 4 Schematic diagram of the partial structure of the inlet end of the second sand inlet channel in this embodiment;

[0031] Figure 5 This is a schematic diagram of the structure of the sand pipe joint in this embodiment;

[0032] Figure 6 Schematic diagram of the structure of the T-shaped sealing ring in this embodiment. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0034] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] like Figure 3 As shown, an asymmetric dual radial suction type high-performance liquid sandblasting gun of this embodiment includes an expansion jet tube 10, an air inlet channel 20, a mixing chamber 50, and a radial sand inlet channel for sucking sand. The air inlet channel 20 is coaxially arranged with the expansion jet tube 10, and an air inlet pipe 22 is arranged at one end of the air inlet channel 20 for introducing compressed air; an increaser tube 21 is arranged at one end of the air inlet channel 20 close to the expansion jet tube 10 for increasing the speed of the airflow, and the mixing chamber 50 is located between the expansion jet tube 10 and the increaser tube 21. After the high-speed airflow and the mortar are mixed in the mixing chamber, they are ejected from the expansion jet tube 10 to perform sandblasting on the surface of the parts.

[0037] As a special feature of this embodiment, the radial sand feeding channel includes a first sand feeding channel 30 and a second sand feeding channel 40. The first sand feeding channel 30 is connected to the mixing chamber 50 at a first inclination angle α with the axis, and a first sand feeding port 31 is formed in the mixing chamber 50; the second sand feeding channel 40 is connected to the mixing chamber 50 at a second inclination angle β with the axis, and a second sand feeding port 41 is formed in the mixing chamber 50.

[0038] As a special feature of this embodiment, the first sand inlet 31 is closer to the expansion injection pipe 10 than the second sand inlet 41. The purpose of such a setting is that when the sandblasting gun is sandblasting, the first sand inlet channel 30 and the second sand inlet channel 40 have different suction forces on the mortar. The first sand inlet channel 30, which is closer to the expansion injection pipe 10, serves as the main channel for sucking sand, and the sand content in the mortar entering from the first sand inlet channel 30 is higher; the second sand inlet channel 40 serves as an auxiliary channel, and the sand content in the mortar entering from the second sand inlet channel 40 is lower than that of the first sand inlet channel 30. In this way, after the mortars with different sand-water ratios entering through the two channels are mixed again, the sand-water ratio can be balanced, the sand output of the expansion injection pipe 10 is more stable, and the sandblasting cutting ability is stronger.

[0039] Furthermore, as a special feature of this embodiment, the inner diameter of the first sand inlet channel 30 is greater than the inner diameter of the second sand inlet channel 40. The purpose of such a setting is to further increase the suction difference between the main and auxiliary channels, give priority to the main channel to feed sand, and improve the sand-water ratio.

[0040] Furthermore, as a special feature of this embodiment, the first inclination angle α is greater than the second inclination angle β. The purpose of such a setting is that the smaller the axial inclination angle of the auxiliary channel is and the closer it is to the axis, the better the acceleration performance of the auxiliary channel is. When the main channel is blocked, the vacuum suction of the auxiliary channel increases and the flow rate is accelerated, which is conducive to flushing the sand blockage of the main pipeline, thereby improving the technical problem of easy blockage of the main channel.

[0041] As a special feature of this embodiment, the inlet ends of the first sand inlet channel 30 and the second sand inlet channel 40 are flexibly sealed and connected to the sand inlet pipe 70 through a sand pipe joint 50 and a T-shaped sealing ring 60. In this embodiment, the second sand inlet channel 40 is used as an example for description.

[0042] like Figure 4 As shown, the inlet end of the second sand inlet channel 40 of this embodiment is provided with an internal thread interface 42 , and the bottom of the internal thread interface 42 is provided with a step surface 43 .

[0043] like Figure 5As shown, the sand pipe joint 50 of this embodiment is provided with an axially through-hole 52, the inner diameter of the hole 52 is larger than the outer diameter of the sand inlet pipe 70, one end of the sand pipe joint 50 is provided with an external thread joint 51 adapted to be screwed with the internal thread interface 42, and one end of the sand pipe joint away from the external thread joint 51 is provided with a bearing portion 53 for bearing the screwing force applied to the sand pipe joint. Preferably, in this embodiment, the cross section of the bearing portion 53 is a regular hexagon, that is, a nut-shaped structure. Of course, this is only a preferred implementation of this embodiment, and other structures that are easy to apply screwing force can also be used.

[0044] like Figure 6 As shown, the T-shaped sealing ring 60 of this embodiment includes an axial sealing section 61 and an annular convex portion 62 provided at one end of the axial sealing section. The axial sealing section 63 is provided with an axially penetrating sealing hole 63, one end of the sand inlet pipe 70 is inserted into the sealing hole 63 and has an interference fit with the sealing hole 63, and the annular convex portion 62 is clamped between the end surface of the external thread joint 51 and the step surface 43.

[0045] In this embodiment, the sand inlet pipe 70 is sealed and connected with the T-shaped sealing ring 60 through interference fit, and the assembly formed by the sand inlet pipe 70 and the T-shaped sealing ring 60 is clamped between the end face of the external threaded joint 51 and the step surface 43 through the annular protrusion 62 to achieve sealing and connection. The advantage of this flexible sealing connection is that in different working conditions, the angle of the sand inlet pipe 70 can be swung at will without any sealing problems, and it can better adapt to the working environment of the automated production line.

[0046] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An asymmetric double radial suction high performance liquid sandblasting gun, characterized in that: At least: expansion jet pipe; An air intake passage, wherein the air intake passage is coaxially arranged with the expansion injection pipe, an air intake pipe is arranged at one end of the air intake passage, and a speed increasing pipe is arranged at one end close to the expansion injection pipe; A mixing chamber, the mixing chamber is located between the expansion injection pipe and the speed increasing pipe; a first sand inlet channel, the first sand inlet channel being connected to the mixing chamber at a first inclination angle with the axis; a second sand inlet passage, the second sand inlet passage being connected to the mixing chamber at a second inclination angle with the axis; Wherein, a first sand inlet communicating with the first sand inlet channel and a second sand inlet communicating with the second sand inlet channel are arranged in the mixing chamber, and the first sand inlet is closer to the expansion injection pipe than the second sand inlet.

2. The asymmetric dual radial suction high performance liquid sandblasting gun according to claim 1, characterized in that: The inner diameter of the first sand inlet channel is greater than the inner diameter of the second sand inlet channel.

3. The asymmetric dual radial suction high performance liquid sandblasting gun according to claim 1, characterized in that: The first inclination angle is greater than the second inclination angle.

4. The asymmetric dual radial suction high performance liquid sandblasting gun according to any one of claims 1 to 3, characterized in that: The inlet end of the first sand inlet channel and / or the second sand inlet channel is flexibly sealed and connected to the sand inlet pipe through a sand pipe joint and a T-shaped sealing ring.

5. The asymmetric dual radial suction high performance liquid sandblasting gun according to claim 4, characterized in that: An inlet end of the first sand inlet channel and / or the second sand inlet channel is provided with an internal thread interface, and a step surface is provided at the bottom of the internal thread interface.

6. The asymmetric dual radial suction high performance liquid sandblasting gun according to claim 5, characterized in that: The sand pipe joint is provided with an axially through-going connection hole, the inner diameter of the connection hole is larger than the outer diameter of the sand inlet pipe, one end of the sand pipe joint is provided with an external thread joint adapted to be screwed with the internal thread interface, and the end of the sand pipe joint away from the external thread joint is provided with a bearing portion for bearing the screwing force applied to the sand pipe joint.

7. The asymmetric dual radial suction high performance liquid sandblasting gun according to claim 6, characterized in that: The T-shaped sealing ring includes an axial sealing section and an annular convex portion arranged at one end of the axial sealing section. The axial sealing section is provided with an axially penetrating sealing hole. One end of the sand inlet pipe is inserted into the sealing hole and has an interference fit with the sealing hole. The annular convex portion is clamped between the end face of the external threaded joint and the step surface.

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