Steel grit separating device
By designing a steel and sand separation device with specific sand inlet direction and reinforcement plate, the problem of local cyclone air flow and steel sand breakage during sand blasting is solved, the effect of stable sand blasting flow and efficient steel sand recovery is achieved, and the service life of the device is extended.
Patent Information
- Application Number
- CN202421360593.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-06-14
AI Technical Summary
The existing steel and sand separation devices easily form local cyclone air flow during the sandblasting process, which affects the stability of the sandblasting flow. The steel sand is easily broken when it hits the side wall, reducing recycling efficiency, and at the same time, the side walls are seriously worn, increasing maintenance costs.
A steel sand separation device is designed, including a cylinder, a sand inlet and a sand outlet. The direction of the sand inlet is the same as the tangent direction of the cyclone air flow in the cylinder, and the sand outlet is perpendicular to the bottom or top surface of the cylinder. At the same time, a reinforcement plate is added at the sand inlet, and a filter net is installed in the cylinder to achieve secondary filtration.
It effectively avoids the formation of local cyclone air flow, stabilizes the air pressure of the sand outlet, and improves the stability of the sandblasting flow; reduces the secondary crushing of steel sand, and improves the recovery rate; strengthens the plate to improve wear resistance and extends the service life; the filter screen increases the secondary filtration function, which improves the separation effect.
Smart Images
Figure CN222768148U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of particle separation equipment, in particular to a steel sand separation device. Background Art
[0002] The working principle of the sandblasting machine is: using compressed air as the power, the abrasive (steel sand, steel shot, corundum, ceramic materials, etc.) is accelerated and then sprayed at high speed through the spray gun to hit the surface of the workpiece, thereby removing rust, oxide scale, dirt, etc. on the surface of the workpiece, and finally obtaining a clean and rough surface. During the sandblasting process, the abrasive will be broken into finer powder after multiple collisions with the workpiece. In the subsequent circulation process, the steel sand that is too fine and the oxide scale, dust and other substances carried after sandblasting cannot be effectively used again, and affect the efficiency of the sandblasting process. In order to remove the above impurities, a steel sand separation device is required to separate, screen and reuse the effective steel sand, thereby reducing the waste of steel sand, reducing operating costs, and ensuring the stability of the sandblasting machine.
[0003] There are two main methods for separating steel sand: screening method and cyclone separation method. The screening method uses screens with different apertures to screen the steel sand. The steel sand that meets the requirements continues to be used after screening, and the steel sand that is too fine and impurities are intercepted. The cyclone separation method uses the principle of centrifugal force. When the airflow carries particles of different masses through the cyclone separator, the steel sand with larger mass is thrown to the wall due to the centrifugal force and falls into the recovery device, and the dust and scale with lighter mass follow the airflow into the dust removal and filtration system, thereby completing the effective separation of steel sand.
[0004] The existing sand separation method has the following disadvantages: (1) During sandblasting, the high-speed airflow from the air inlet directly hits the side wall of the sand separation device and then diverges to the surroundings. The divergent airflow interacts with the incident airflow from the air inlet, and finally forms a local swirling airflow inside the sand separation device. Figure 1 As shown in the figure, the swirling airflow will affect the stability of the air pressure at the sand return port, thereby affecting the stability of the sandblasting flow rate, which is not conducive to the consistency of the sandblasting process; (2) The high-speed airflow carries the steel sand and directly hits the front side wall. On the one hand, the steel sand carries a large kinetic energy and is prone to secondary crushing after colliding with the side wall, which affects the recovery efficiency of the steel sand. On the other hand, during long-term work, the repeated collision of the steel sand with the front side wall is likely to cause side wall wear and breakdown, increasing the maintenance cost of the tooling.
[0005] Based on this, it is necessary to improve the existing steel sand separation device. Utility Model Content
[0006] Technical purpose: In order to overcome the deficiencies in the prior art, the utility model provides a steel sand separation device.
[0007] Technical solution: To achieve the above-mentioned purpose, the utility model discloses a steel sand separation device, comprising a cylinder for accommodating steel sand, the cylinder being provided with a sand inlet and a sand outlet, the sand inlet having a sand inlet direction which is the same as the tangent direction of the swirling airflow in the cylinder, and the sand outlet being oriented in a direction perpendicular to the bottom surface or the top surface of the cylinder.
[0008] Preferably, the cylinder is connected to a feed pipe, which forms the sand inlet; the feed pipe includes a straight pipe section, a first curved pipe section and a second curved pipe section which are connected end to end in sequence, the first curved pipe section is tangentially connected to the straight pipe section, and the second curved pipe section is tangentially connected to the first straight pipe section; the height of the cylinder is defined as d7, and the height of the axis of the straight pipe section from the bottom surface of the cylinder is defined as d8, wherein d8=(0.14~0.2)*d7.
[0009] Preferably, the cross section of the cylinder is circular, the center of the cross section of the cylinder is defined as O, and the bending center of the second curved pipe section is defined as O', wherein the center O and the center O' coincide with each other.
[0010] Preferably, the cylinder is connected with a discharge pipe, the discharge pipe forms a sand outlet, the discharge pipe is connected to the top of the cylinder, and the feed pipe is connected to the middle or lower part of the cylinder.
[0011] Preferably, the inner diameter of the feed pipe is defined as d1, and the inner diameter of the discharge pipe is defined as d2, wherein d2:d1=1-1.2.
[0012] Preferably, the inner diameter of the cylinder is defined as d3, wherein d3:d2=4-6.
[0013] Preferably, a filter screen is connected to the cylinder through a support, and a distance d4 between the filter screen and the top surface of the cylinder is defined, wherein d4=(0.14-0.2)*d7; and the mesh number of the filter screen is between 60-80 meshes.
[0014] Preferably, the inner wall of the cylinder is connected with a reinforcing plate, the reinforcing plate is made of high manganese steel or wear-resistant alloy steel, and the reinforcing plate is arranged at the sand inlet.
[0015] Preferably, the height of the reinforcing plate is defined as d5, the inner diameter of the feed pipe is defined as d1, d5:d1=1.4-2; the center line of the reinforcing plate in the height direction is located in the plane where the axis of the second bend section is located.
[0016] Preferably, the angle between the end cross section of the second curved pipe section and the tangent line of the cylinder is 90°.
[0017] The steel sand separation device disclosed in the utility model has the following technical effects:
[0018] (1) In the process of separating steel sand by using the utility model, based on the design of the sand inlet and the sand outlet, no local swirling airflow will be generated in the cylinder, which is conducive to stabilizing the air pressure at the sand outlet, thereby ensuring the stability of the sandblasting flow rate; at the same time, it also avoids secondary crushing after the steel sand directly collides with the inner wall of the cylinder, thereby improving the recovery rate of the steel sand.
[0019] (2) A reinforcing plate is added at the sand inlet inside the cylinder to improve the strength and wear resistance of the cylinder at the sand inlet and extend its service life.
[0020] (3) A filter is added inside the cylinder to increase the secondary filtration function. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of airflow simulation when an existing steel sand separation device separates steel sand;
[0022] Figure 2 It is a schematic diagram of airflow simulation when the steel sand separation device of the utility model separates steel sand;
[0023] Figure 3 This is a structural schematic diagram of the steel sand separation device of the utility model;
[0024] Figure 4 It is a top view of the steel sand separation device of the utility model;
[0025] Figure 5 It is a structural schematic diagram of the feed pipe of the utility model.
[0026] In the figure, 1, cylinder; 2, feed pipe; 201, straight pipe section; 202, first curved pipe section; 203, second curved pipe section; 3, support; 4, filter screen; 5, reinforcement plate; 6, discharge pipe. DETAILED DESCRIPTION
[0027] The following is combined with Figure 1 To Attachment Figure 5 The principles and features of the present invention are described, and the examples given are only used to explain the present invention, and are not used to limit the scope of the present invention.
[0028] Embodiment 1
[0029] As the most basic embodiment, a steel sand separation device includes a cylinder 1 for containing steel sand, and a sand inlet and a sand outlet are arranged in the cylinder 1, wherein the sand inlet has a sand inlet direction that is the same as the tangent direction of the swirling airflow in the cylinder 1. The swirling airflow here can be seen in the attached Figure 2 , refers to the cylindrical fluid form formed by the steel sand in the cylinder 1 due to the centrifugal force. The sand outlet is perpendicular to the bottom or top surface of the cylinder 1. Based on this design, when separating the steel sand, the local swirling airflow of the cylinder 1 can be improved.
[0030] Embodiment 2
[0031] As an improvement to the above embodiment, in order to achieve better technical effects, the above sand inlet is formed by the feed pipe 2, and the above sand outlet is formed by the discharge pipe 6. Specifically, the feed pipe 2 and the discharge pipe 6 are respectively connected to the cylinder 1, wherein the feed pipe 2 includes a straight pipe section 201, a first curved pipe section 202 and a second curved pipe section 203 which are connected end to end in sequence, the first curved pipe section 202 is tangentially connected to the straight pipe section 201, and the second curved pipe section 203 is tangentially connected to the first curved pipe section 202. The discharge pipe 6 is connected to the top of the cylinder 1, and the feed pipe 2 is connected to the middle or lower part of the cylinder 1. The cylinder 1 is cylindrical, that is, the cross section is circular, the center of the cross section of the cylinder 1 is defined as o, and the center of the bending circle of the second curved pipe section 203 is defined as 0', wherein the center O coincides with the center O'.
[0032] Embodiment 3
[0033] As a further improvement to Example 2, the absolute dimensions and dimension ratios of different technical features will affect the distribution and pressure difference of the airflow of the cylinder 1. In order to achieve a better technical effect, the dimensions of the relevant technical features need to be defined. The inner diameter of the feed pipe 2 is defined as d1, the inner diameter of the discharge pipe 6 is defined as d2, the inner diameter of the cylinder 1 is defined as d3, the height of the cylinder 1 is defined as d7, and the height of the axis of the straight pipe section 201 from the bottom surface of the cylinder 1 is defined as d8, wherein d2:d1=1~1.2, d3:d2=4~6, d8=(0.14~0.2)*d7, and the angle between the end section of the second curved pipe section 202 and the tangent of the cylinder 1 is 90°.
[0034] Embodiment 4
[0035] In order to further improve the separation effect of steel sand, a filter screen 4 is connected to the cylinder 1 through the support 3, and the distance between the filter screen 4 and the top surface of the cylinder 1 is defined as d4, wherein d4=(0.14-0.2)*d7, and the mesh number of the filter screen 4 is between 60-80.
[0036] Embodiment 5
[0037] Steel sand is ejected from the discharge port, so the steel sand has greater kinetic energy at the discharge port and has a greater impact on the cylinder 1. Therefore, a reinforcing plate 5 is connected to the inner wall of the cylinder 1. The reinforcing plate 5 is made of high manganese steel or wear-resistant alloy steel and is arranged at the sand inlet. Specifically, the center line of the reinforcing plate 5 in the height direction is located in the plane where the axis of the second curved pipe section 203 is located, and the height of the reinforcing plate 5 is defined as d5, d5: d1 = 1.4~2.
[0038] The common inner diameter of the cylinder 1 (ie, d3) is generally between 300-360 mm, and the height of the cylinder 1 (ie, d3) is generally between 300-400 mm.
[0039] When sandblasting is used, the high-speed airflow carries steel sand, oxide scale, dust and other materials into the cylinder 1 from the sand inlet, forming a high-speed swirling airflow. The airflow rotates in a circumferential direction along the inner wall of the cylinder, and at the same time, it is an upward airflow with decreasing pressure from bottom to top. During the movement, the steel sand with larger mass carried in the airflow is thrown to the inner wall of the sand separation bucket under the action of centrifugal force and falls to the bottom of the sand separation bucket. The oxide scale, dust and other materials with smaller mass continue to move with the rising airflow, and flow into the filtration system through the sand outlet after passing through the filter 4. The filter 4 mainly plays a secondary filtering role, which is used to filter the steel sand with larger mass that is not separated under the action of the cyclone separation, and at the same time does not affect the passage of impurities with smaller particle size, thereby improving the recovery efficiency of steel sand. The reinforcing plate 5 mainly plays a role in buffering the wear of the high-speed steel sand at the outlet and extending the service life of the components.
[0040] 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, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A steel sand separation device, comprising a cylinder (1) for containing steel sand, wherein the cylinder (1) is provided with a sand inlet and a sand outlet, and is characterized in that: The sand inlet has a sand inlet direction that is the same as the tangent direction of the swirling airflow in the cylinder (1), and the sand outlet faces a direction perpendicular to the bottom surface or the top surface of the cylinder (1).
2. The steel sand separation device according to claim 1, characterized in that: The cylinder (1) is connected to a feed pipe (2), and the feed pipe (2) forms the sand inlet; the feed pipe (2) comprises a straight pipe section (201), a first curved pipe section (202), and a second curved pipe section (203) which are connected end to end in sequence, the first curved pipe section (202) is tangentially connected to the straight pipe section (201), and the second curved pipe section (203) is tangentially connected to the first curved pipe section (202); the height of the cylinder (1) is defined as d7, and the height of the axis of the straight pipe section (201) from the bottom surface of the cylinder (1) is defined as d8, wherein d8=(0.14-0.2)*d7.
3. The steel sand separation device according to claim 2, characterized in that: The cross section of the cylinder (1) is circular, the center of the cross section of the cylinder (1) is defined as O, and the bending center of the second curved pipe section (203) is defined as O', wherein the center O and the center O' coincide with each other.
4. The steel sand separation device according to claim 2, characterized in that: The cylinder (1) is connected to a discharge pipe (6), the discharge pipe (6) forms a sand outlet, the discharge pipe (6) is connected to the top of the cylinder (1), and the feed pipe (2) is connected to the middle or lower part of the cylinder (1).
5. The steel sand separation device according to claim 4, characterized in that: The inner diameter of the feed pipe (2) is defined as d1, and the inner diameter of the discharge pipe (6) is defined as d2, wherein d2:d1=1-1.
2.
6. The steel sand separation device according to claim 5, characterized in that: The inner diameter of the cylinder (1) is defined as d3, wherein d3:d2=4-6.
7. The steel sand separation device according to claim 2, characterized in that: A filter screen (4) is connected to the cylinder (1) via a support (3), and a distance d4 between the filter screen (4) and the top surface of the cylinder (1) is defined, wherein d4=(0.14-0.2)*d7; the mesh number of the filter screen (4) is between 60 and 80.
8. The steel sand separation device according to claim 2, characterized in that: The inner wall of the cylinder (1) is connected with a reinforcing plate (5), the reinforcing plate (5) is made of high manganese steel or wear-resistant alloy steel, and the reinforcing plate (5) is arranged at the sand inlet.
9. The steel sand separation device according to claim 8, characterized in that: The height of the reinforcing plate (5) is defined as d5, and the inner diameter of the feed pipe (2) is defined as d1, wherein d5:d1=1.4-2; the center line of the reinforcing plate (5) in the height direction is located in the plane where the axis of the second curved pipe section (203) is located.
10. The steel sand separation device according to claim 2, characterized in that: The angle between the end section of the second curved pipe section (203) and the tangent line of the cylinder (1) is 90°.