Anti-condensation device for powder selection machine

Abstract

The utility model relates to an anti-condensation device for a powder selection machine, comprising a powder selection machine, a heating mechanism and an air pump; the heating mechanism comprises a box, a bearing tube and a connecting tube, three bearing tubes are arranged in the box, a heating rod is arranged in the bearing tube, a heat-conducting spiral sheet is arranged on the outer cover of the heating rod, and the heating rod is connected to the mains; the left and right ends of the middle bearing tube are connected to a connecting tube, the upper end of the connecting tube at the left end opens to the right and connects to the upper bearing tube, the lower end of the connecting tube at the right end opens to the left and connects to the lower bearing tube, and each connecting tube is arranged with a spoiler ring at intervals; the lowermost bearing tube is connected to an air inlet pipe whose end passes through the box, and the uppermost bearing tube is connected to an air outlet pipe whose end passes through the box, and the air outlet pipe is connected to the air inlet of the powder selection machine via an air pump. The utility model solves the problems of low air temperature entering the powder selection machine, easy condensation in the powder selection machine, and uneven heating of the air entering the powder selection machine.

Description

Technical Field

[0001] The utility model relates to the technical field of proppant production, in particular to an anti-condensation device for a powder selector. Background Art

[0002] When producing proppants, raw materials such as bauxite need to be crushed first, then ground, and then a powder selection device is used to screen out particles of different particle sizes. The powder selection machine can grade and screen the raw materials to meet the needs of different oil well fracturing operations.

[0003] When the powder classifier is in use, condensation is likely to form inside the powder classifier. The reason is that when the difference between the internal temperature of the powder classifier and the external ambient temperature is large, the external air with a lower temperature may enter the powder classifier, causing condensation on the internal materials or equipment surface. Currently, a heating device is generally used to heat the air entering the powder classifier. However, due to the rapid air flow, it is difficult to fully heat the air while passing through the heating device. It is difficult for the heating device to heat the flowing air evenly. Inconsistent air temperature may cause uneven distribution of airflow inside the powder classifier, thereby affecting the classification and separation of particles. Summary of the invention

[0004] The utility model provides an anti-condensation device for a powder classifier to solve the problems of low temperature of air entering a powder classifier, easy condensation in the powder classifier, and uneven heating of the air entering the powder classifier. The utility model can increase the temperature of the air entering the powder classifier, make the air temperature uniform, and improve the classification quality of the proppant particles.

[0005] In order to solve the above problems, the technical solution of the utility model is:

[0006] A dew condensation prevention device for a powder selection machine comprises a powder selection machine, a heating mechanism and an air pump; the heating mechanism comprises a box body, a supporting tube and a connecting tube, three supporting tubes are arranged at intervals in the box body, a heating rod is arranged in each supporting tube, a heat-conducting spiral sheet is arranged on the outer sleeve of the heating rod, the outer edge of the heat-conducting spiral sheet is fixedly connected to the inner wall of the supporting tube, and the heating rod is connected to the mains; the left and right ends of the middle supporting tube are connected to a connecting tube, the upper end of the connecting tube at the left end opens to the right and is connected to the upper supporting tube, and the lower end of the connecting tube at the right end opens to the left and is connected to the lower supporting tube, and spoiler rings are arranged at intervals in each connecting tube; the lowermost supporting tube is connected to an air inlet pipe whose end passes through the box body, and the uppermost supporting tube is connected to an air outlet pipe whose end passes through the box body, and the air outlet pipe is connected to the air inlet of the powder selection machine via an air pump.

[0007] Furthermore, the heating rod is connected with a wire, and the free end of the wire passes through the supporting tube and the box in sequence and is connected to the mains.

[0008] Furthermore, the connecting pipe is a C-shaped pipe formed by bending a circular tube, and the three supporting pipes are connected to form an S-shaped pipe via the connecting pipe.

[0009] Furthermore, the spoiler ring is a semi-cylindrical curved annular body connected end to end, the inner side of the spoiler ring has an arc-shaped protrusion facing the central axis of the connecting pipe, and the other side is fixedly connected to the inner wall of the connecting pipe.

[0010] Furthermore, the heat-conducting spiral sheet is a sheet-like body made of copper, and a heat-insulating layer is provided in the box outside the S-shaped pipe formed by connecting a plurality of the supporting tubes.

[0011] Furthermore, the free end of the air outlet pipe is connected to the input end of the air pump, and the output end of the air pump is connected to the air inlet of the powder selector via the air delivery pipe.

[0012] Through the above technical solution, the beneficial effects of the utility model are:

[0013] The utility model is driven by an air pump and, when external air passes through the heating mechanism, can extend the flow path of the air in the carrying tube, so that the air can be in contact with more heat-conducting spiral sheets and the heating rod, thereby increasing the air temperature and the heating efficiency. Moreover, when the air passes through the connecting tube, the air can be disturbed by the spoiler ring to form a vortex, thereby promoting the mixing of the air passing through the connecting tube, thereby making the temperature of the heated air uniform and improving the powder selection quality of the powder selection machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a sectional front view of the heating mechanism of the utility model (the heating rod and the heat-conducting spiral sheet are not cut);

[0016] Figure 3 It is a cross-sectional top view of the heating rod of the utility model connected to the carrying tube and the wire (the heating rod and the heat-conducting spiral sheet are not cut);

[0017] Figure 4 It is a sectional top view of the connecting pipe connected to the spoiler ring of the utility model.

[0018] The numbers in the attached figure are: 1, powder classifier, 2, air pump, 3, box body, 4, supporting tube, 5, connecting tube, 6, heating rod, 7, heat-conducting spiral sheet, 8, spoiler ring, 9, air inlet pipe, 10, air outlet pipe, 11, wire, 12, insulation layer, 13, air supply pipe. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0020] like Figure 1 to Figure 4As shown, an anti-condensation device for a powder selection machine includes a powder selection machine 1, a heating mechanism and an air pump 2; the heating mechanism includes a box body 3, a supporting tube 4 and a connecting tube 5, the box body 3 is a hollow rectangular parallelepiped with an opening at the lower end blocked by a sealing plate, three supporting tubes 4 are arranged at intervals from top to bottom in the box body 3, the supporting tube 4 is a circular tube with openings at both ends, a heating rod 6 is coaxially arranged in each of the supporting tubes 4, the heating rod 6 is covered with a heat-conducting spiral sheet 7, and the outer edge of the heat-conducting spiral sheet 7 is fixedly connected to the inner wall of the supporting tube 4 , the heating rod 6 is connected to the mains; the left and right ends of the middle supporting tube 4 are connected to a connecting tube 5, the upper end of the connecting tube 5 at the left end is opened to the right and connected to the upper supporting tube 4, and the lower end of the connecting tube 5 at the right end is opened to the left and connected to the lower supporting tube 4, and each connecting tube 5 is provided with a spoiler ring 8 at intervals; the lowermost supporting tube 4 is connected to an air inlet pipe 9 whose end passes through the left side plate of the box body 3, and the uppermost supporting tube 4 is connected to an air outlet pipe 10 whose end passes through the right side plate of the box body 3, and the air outlet pipe 10 is connected to the air inlet of the powder selector 1 through the air pump 2.

[0021] The heating rod 6 is connected with a wire 11, and the free end of the wire 11 passes through the supporting tube 4 and the box body 3 in sequence and is connected to the mains.

[0022] The connecting pipe 5 is a C-shaped pipe formed by bending a round pipe, and the three supporting pipes 4 are connected to form an S-shaped pipe via the connecting pipe 5 .

[0023] The spoiler ring 8 is a semi-cylindrical curved torus connected end to end, the inner side of the spoiler ring 8 is arc-shaped and convex toward the central axis of the connecting pipe 5, and the other side is fixedly connected to the inner wall of the connecting pipe 5.

[0024] The heat-conducting spiral sheet 7 is a sheet made of copper. A heat-insulating layer 12 is arranged in the box body 3 outside the S-shaped pipe formed by connecting a plurality of the supporting tubes 4. The heat-insulating layer 12 is a layered structure made of calcium carbonate material.

[0025] The free end of the air outlet pipe 10 is connected to the input end of the air pump 2 , and the output end of the air pump 2 is connected to the air inlet of the powder selector 1 via the air delivery pipe 13 .

[0026] When in use, the heating rod 6 in each supporting tube 4 is energized for heating, and the heat of the heating rod 6 is transferred to the heat-conducting spiral sheet 7; when the powder selecting machine 1 selects powder, the air pump 2 is started, and the gas with a lower external temperature enters the supporting tube 4 at the lower end of the box body 3 through the air inlet pipe 9. When the gas passes through the supporting tube 4, since the outer edge of the heat-conducting spiral sheet 7 in the supporting tube 4 is connected to the inner wall of the supporting tube 4, the gas moves in a spiral shape in the supporting tube 4, thereby extending the flow path of the gas. The gas can contact more with the heat-conducting spiral sheet 7 and the heating rod 6, and heats faster. When the gas enters the connecting tube 5 connected to the right end of the lowermost supporting tube 4, since a plurality of spoiler rings 8 are arranged at intervals in the connecting tube 5, the diameter of the airflow channel in the connecting tube changes continuously. In the place where the air flows, a rotating flow, i.e., an eddy current, is formed. These eddies can mix the gas in the connecting pipe 5, making the air fluid temperature more uniform, and avoiding the low temperature of the air that is not in contact with the heat-conducting spiral sheet 7 and the heating rod 6 when the airflow is heated in the supporting pipe 4. The spoiler ring 8 in the connecting pipe 5 can reduce the temperature difference of the air entering the middle supporting pipe 4. Similarly, the air is heated when passing through the middle supporting pipe 4, and is mixed again when passing through the connecting pipe 5 at the left end of the middle supporting pipe 4. The air enters the upper end supporting pipe 4 and is heated again. Subsequently, the temperature of the air flowing into the powder selector 1 through the air pump 2 is increased, and condensation of the raw materials in the powder selector 1 is avoided. Moreover, the temperature of the air entering the powder selector 1 is uniform, and the classification quality of the proppant particles is improved.

[0027] The preferred implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings; however, the present invention is not limited to the above-mentioned embodiments. Without violating the spirit of the present invention, i.e., the disclosure scope, any equivalent or equivalent deformation or replacement of the technical solution of the present invention shall fall within the protection scope of the present invention.

Claims

1. A dew condensation prevention device for a powder classifier, comprising a powder classifier (1), characterized in that: It also includes a heating mechanism and an air pump (2); the heating mechanism includes a box body (3), a supporting tube (4) and a connecting tube (5); three supporting tubes (4) are arranged at intervals in the box body (3); each supporting tube (4) is provided with a heating rod (6); the heating rod (6) is covered with a heat-conducting spiral sheet (7); the outer edge of the heat-conducting spiral sheet (7) is fixedly connected to the inner wall of the supporting tube (4); the heating rod (6) is connected to the mains; the left and right ends of the middle supporting tube (4) are both connected to a connecting tube (5 ), the upper end of the connecting tube (5) at the left end opens to the right and is connected to the upper supporting tube (4), the lower end of the connecting tube (5) at the right end opens to the left and is connected to the lower supporting tube (4), and each connecting tube (5) is provided with a spoiler ring (8) at intervals; the lowermost supporting tube (4) is connected to an air inlet pipe (9) whose end passes through the box body (3), and the uppermost supporting tube (4) is connected to an air outlet pipe (10) whose end passes through the box body (3), and the air outlet pipe (10) is connected to the air inlet of the powder selection machine (1) through the air pump (2).

2. The anti-condensation device for a powder selector according to claim 1, characterized in that: The heating rod (6) is connected to a wire (11), and the free end of the wire (11) passes through the supporting tube (4) and the box (3) in sequence and is connected to the mains.

3. The anti-condensation device for a powder selector according to claim 1, characterized in that: The connecting pipe (5) is a C-shaped pipe formed by bending a circular tube, and the three supporting pipes (4) are connected to form an S-shaped pipe via the connecting pipe (5).

4. The anti-condensation device for a powder selector according to claim 3, characterized in that: The spoiler ring (8) is a circular ring body formed by bending a semi-cylinder and connecting end to end; the inner side surface of the spoiler ring (8) is arc-shaped and convex toward the central axis of the connecting pipe (5), and the other side surface is fixedly connected to the inner wall of the connecting pipe (5).

5. The anti-condensation device for a powder selector according to claim 3, characterized in that: The heat-conducting spiral sheet (7) is a sheet-shaped body made of copper, and a heat-insulating layer (12) is provided in the box (3) outside the S-shaped pipe formed by connecting a plurality of the supporting tubes (4).

6. The anti-condensation device for a powder selector according to claim 1, characterized in that: The free end of the air outlet pipe (10) is connected to the input end of the air pump (2), and the output end of the air pump (2) is connected to the air inlet of the powder selector (1) via the air delivery pipe (13).

Images