Small-rod-diameter long-spray-rod sand blasting head provided with annular brush supporting mechanism

Abstract

The invention discloses a small-rod-diameter long-spray-rod sand blasting head provided with an annular brush supporting mechanism. The small-rod-diameter long-spraying-rod sand blasting head provided with the annular brush auxiliary supporting mechanism is adopted, it can be guaranteed that the sand blasting head is located in the center of an inner cavity of a workpiece to conduct sand blasting operation smoothly, only a smaller radial space size can be occupied, and therefore the superiority of sand blasting operation in a small-size long pipe hole of the workpiece is not reduced. On the premise that the surface of a workpiece is not damaged, the sand blasting head can rotate and move back and forth.

Description

[0001] field:

[0002] The present invention discloses a small-rod-diameter long-spray-rod sandblasting head equipped with an annular brush support mechanism. The small-rod-diameter long-spray-rod sandblasting head equipped with an annular brush auxiliary support mechanism can ensure that the sandblasting head is located at the center of the inner cavity of the workpiece for smooth sandblasting operations, and can only occupy a smaller radial space size, so the superiority of the sandblasting operation inside the small-sized long tube hole of the workpiece is not reduced. The sandblasting head is provided with the ability to rotate and move forward and backward without scratching the surface of the workpiece. The technology belongs to the field of pneumatic sandblasting technology and is applied to surface engineering. Background technology:

[0003] Sandblasting the inner wall of a small-sized pipe hole in a workpiece has always been a difficult problem in the application of sandblasting technology. The existing sandblasting technology for the inner wall of a pipe hole is difficult to use for a pipe hole smaller than 100 mm, especially difficult to implement sandblasting on the inner wall of a deeper pipe hole.

[0004] The so-called small-rod-diameter long-spray-rod sandblasting head is a small-rod-diameter sandblasting head equipped with a relatively long high-pressure sand flow delivery spray rod (patent number 202223061049.7 small-rod-diameter sandblasting head). This small-rod-diameter long-spray-rod sandblasting head can penetrate into the long tube hole of the workpiece to implement sandblasting, but it cannot avoid collision with the wall when sandblasting the inner wall of the long tube hole, and a support mechanism that provides centering and movement capabilities needs to be installed. However, the support mechanism of the prior art is difficult to meet the requirements.

[0005] The existing inner wall sandblasting support mechanism for pipe holes includes a frame caster mechanism and a screw support rod caster adjustment mechanism. The frame caster mechanism and the screw support rod caster mechanism control and change the opening degree of multiple support casters through a threaded adjustment mechanism to adapt to different pipe hole diameters. They have two functions: one is to maintain the sandblaster (sandblasting head) in the central position of the support mechanism, that is, the central support function in the long pipe hole; the other is to provide low resistance for the sandblaster (sandblasting head) when moving, that is, the low resistance movement function.

[0006] The existing support mechanism for sandblasting the inner wall of a long tube hole cannot enter the small-sized tube hole because the structural parts occupy a large radial dimension. Therefore, the support mechanism of the prior art cannot support the sandblasting operation of the inner wall of a long tube hole of a small size (within 100 mm) of the workpiece with a small rod diameter and long spray rod sandblasting head. Summary of the invention:

[0007] The present invention proposes a small-rod-diameter long-spray-rod sandblasting head equipped with an annular brush support mechanism, which not only provides the required centering support function and low-resistance motion function, but also greatly reduces the complexity of the mechanism, and more importantly, reduces the radial size. The annular brush support mechanism can enter the small-sized tube hole of the workpiece together with the small-rod-diameter long-spray-rod sandblasting head; the small-sized tube hole is a circular or non-circular tube hole less than 100 mm (collectively referred to as a tube hole in this case).

[0008] The object of the present invention is achieved in this way: a small-rod-diameter long-spray-rod sandblasting head equipped with an annular brush support mechanism, characterized in that it consists of a small-rod-diameter long-spray-rod sandblasting head and an annular brush support mechanism installed thereon; wherein the small-rod-diameter long-spray-rod sandblasting head consists of a long spray rod for conveying high-pressure sand flow and a small-rod-diameter sandblasting head; the small-rod-diameter sandblasting head consists of a boron carbide sandblasting nozzle with a lateral sandblasting port and a sandblasting nozzle metal seat (used to fix the sandblasting nozzle and the thread processed by the sandblasting nozzle to connect with the thread of the long spray rod); the annular brush support mechanism is installed on the sandblasting head; the sandblasting head is composed of a long spray rod for conveying high-pressure sand flow and a small-rod-diameter sandblasting head; the small-rod-diameter sandblasting head is composed ... sandblasting head is composed of a boron carbide sandblasting nozzle with a lateral sand The brush support mechanism is composed of an annular brush mounted on a long spray rod and a limiting ring fixed on the long spray rod by positioning screws; the annular brush is composed of a base ring and the planted hairs thereon; the base ring and the planted hairs are preferably made of nylon material with low friction resistance and good toughness; the planted hairs are short nylon straight wires that are planted vertically and bonded to the base ring; the inner hole of the base ring is slightly larger than the outer diameter of the long spray rod, so that the annular brush is a so-called clearance fit after being mounted on the long spray rod, which is convenient for providing low-resistance relative rotation. The outer contour of the cross section of the annular brush matches the cross-sectional shape of the workpiece tube hole, in order to satisfy the function of centering support and provide low-resistance conditions for the movement of the sandblasting head; the limiting rings are located on both sides of the annular brush and are fixed to the long spray rod by positioning screws. When the limit ring is installed, a gap needs to be left between it and the end surface of the annular brush base ring so that the annular brush can rotate freely; the small-rod-diameter long-spray-rod sandblasting head equipped with an annular brush support mechanism is also characterized in that the annular brush mechanism should be installed close to the sand outlet of the small-rod-diameter sandblasting head, so that the sandblasting head can more accurately maintain the center position and the rotation axis of the sandblasting port is closer to the center line of the workpiece tube hole; a longer workpiece tube hole requires a correspondingly long small-rod-diameter long-spray-rod sandblasting head equipped with an annular brush support mechanism, and a longer spray rod needs to be equipped with multiple annular brush mechanisms, so as to keep the rotation axis of the sandblasting head spray rod and the center axis of the workpiece tube hole better coincident; during sandblasting, a manual or automatic motion device drives the small-rod-diameter long-spray-rod sandblasting head to move forward and backward and rotate around the longitudinal axis, and the annular brush mechanism supports the sandblasting head to rotate in the center and continuously sandblast during the forward and backward movement, and meets the needs of the sandblasting head for low-resistance rotation and forward and backward movement.

[0009] Beneficial effects:

[0010] The small-rod-diameter long-spray-rod sandblasting head equipped with an annular brush support mechanism is characterized in that the sandblasting head not only has the function of centering support and low-resistance movement, but more importantly, the annular brush mechanism has a small radial dimension, and can follow the small-rod-diameter long-spray-rod sandblasting head to enter the small-sized long tube hole of the workpiece, and can perform the sandblasting task of the inner wall of the small-sized (within 100mm) tube hole. Other beneficial effects include: 1) simple structure and small size, low use and maintenance cost; 2) easy installation and replacement; 3 good air permeability, does not affect the normal flow of airflow and normal operation of sandblasting. 4) long service life. Description of the drawings:

[0011] Attached Figure 1 The utility model is a partial longitudinal section view of the assembly drawing of the sand outlet end of a small-rod-diameter long-rod sandblasting head equipped with an annular brush supporting mechanism. In conjunction with the instruction manual Figure 1 Further explanation is as follows:

[0012] 1——Boron carbide sandblasting nozzle with side sand outlet for small diameter sandblasting head

[0013] 2——Metal mounting base for boron carbide sandblasting nozzle

[0014] 3——Annular brush of the annular brush support mechanism

[0015] 4——Limiting ring of the annular brush support mechanism

[0016] 5——Long spray boom for delivering high-pressure sand flow

[0017] A small-rod-diameter long-spray-rod sandblasting head equipped with an annular brush support mechanism, characterized in that it consists of a small-rod-diameter long-spray-rod sandblasting head and an annular brush support mechanism installed thereon; wherein the small-rod-diameter long-spray-rod sandblasting head consists of a long spray rod 5 for conveying high-pressure sand flow and a small-rod-diameter sandblasting head; the small-rod-diameter sandblasting head consists of a boron carbide sandblasting nozzle 1 with a lateral sandblasting port and a sandblasting nozzle metal seat 2 (used to fix the sandblasting nozzle and connect the thread processed by the sandblasting nozzle with the thread of the long spray rod); the annular brush support mechanism It is composed of an annular brush 3 mounted on a long spray rod 5 and a limiting ring 4 fixed on the long spray rod 5 by positioning screws; the annular brush is composed of a base ring and planted hairs thereon; the base ring and the planted hairs are preferably made of nylon material with low friction resistance and good toughness; the planted hairs are short nylon straight wires that are planted vertically and bonded to the base ring; the inner hole of the base ring is slightly larger than the outer diameter of the long spray rod, so that the annular brush is a so-called clearance fit after being mounted on the long spray rod, which is convenient for providing low-resistance relative rotation. The outer contour of the cross section of the annular brush matches the cross-sectional shape of the workpiece tube hole, in order to satisfy the function of centering support and provide low-resistance conditions for the movement of the sandblasting head; the limiting ring 4 is located on both sides of the annular brush and is fixed to the long spray rod 5 by positioning screws. When the limit ring 4 is installed, a gap needs to be left between it and the base ring end surface of the annular brush 3 so that the annular brush can rotate freely; the small-rod-diameter long-spray-rod sandblasting head equipped with an annular brush support mechanism is also characterized in that the annular brush mechanism is installed near the sand outlet of the small-rod-diameter sandblasting head, so that the sandblasting head remains in a central position and the sandblasting outlet can rotate around the axis of the sandblasting head, that is, the center line of the workpiece tube hole: a longer workpiece tube hole requires a correspondingly long small-rod-diameter long-spray-rod sandblasting head equipped with an annular brush support mechanism, and a longer spray rod requires the addition of multiple annular brush mechanisms, so as to keep the rotation axis of the sandblasting head spray rod and the center axis of the workpiece tube hole basically coincident; during sandblasting, a manual or automated motion device drives the small-rod-diameter long-spray-rod sandblasting head to move forward and backward and rotate around the longitudinal axis, and the annular brush mechanism supports the sandblasting head to implement sandblasting in the center, and meets the needs of low-resistance rotation and forward and backward movement of the sandblasting head.

Claims

1. A small-diameter long-rod sandblasting head equipped with an annular brush support mechanism, characterized in that The utility model is composed of a small-rod-diameter long-spray-rod sandblasting head and an annular brush supporting mechanism installed thereon.

2. The small-rod-diameter long-spray-rod sandblasting head equipped with an annular brush support mechanism according to claim 1, characterized in that: The small-rod-diameter long-spray-rod sandblasting head is composed of a long spray rod 5 for conveying high-pressure sand flow and a small-rod-diameter sandblasting head; the small-rod-diameter sandblasting head is composed of a boron carbide sandblasting nozzle 1 with a lateral sandblasting port and a sandblasting nozzle metal seat 2 (used to fix the sandblasting nozzle and connect the thread processed by the sandblasting nozzle with the thread of the long spray rod).

3. The small-rod-diameter long-spray-rod sandblasting head equipped with an annular brush support mechanism according to claim 1, characterized in that: The annular brush support mechanism is composed of an annular brush 3 mounted on a long spray rod 5 and a limiting ring 4 fixed to the long spray rod 5 by positioning screws; the annular brush is composed of a base ring and planted bristles thereon; the base ring and the planted bristles are preferably made of nylon with low friction resistance and good toughness; the planted bristles are short nylon straight wires that are densely planted vertically and bonded to the base ring; the inner hole of the base ring is slightly larger than the outer diameter of the long spray rod, so that after the annular brush is mounted on the long spray rod, it is a so-called clearance fit, which is convenient for providing low-resistance relative rotation. The outer contour of the cross section of the annular brush matches the cross-sectional shape of the workpiece tube hole, with the purpose of satisfying the function of central support and providing low resistance conditions for the movement of the sandblasting head; the limit ring 4 is located on both sides of the annular brush and is fixed to the long spray rod 5 by positioning screws. When the limit ring 4 is installed and fixed, a gap is left between its end face and the base ring end face of the annular brush 3 so that the annular brush can rotate freely; the annular brush mechanism is installed close to the sand outlet of the small-rod diameter sandblasting head, with the purpose of making the rotating axis of the sandblasting head closer to the center line of the workpiece tube hole, which is beneficial to improving the sandblasting quality and uniformity.

4. The small-rod-diameter long-spray-rod sandblasting head equipped with an annular brush support mechanism according to claim 1 is further characterized in that: Longer workpiece tube holes require a correspondingly long small-rod-diameter long-spray-rod sandblasting head equipped with an annular brush support mechanism, while longer spray rods require the addition of multiple annular brush mechanisms in order to keep the rotation axis of the spray rod and the center axis of the workpiece tube hole better aligned and to ensure more stable rotation.

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