Dredging device for oil outlet of vacuum pump

Abstract

The utility model discloses a dredging device for an oil outlet of a vacuum pump, relates to the technical field of dredging devices for oil outlets, and aims to solve the problems that in the using process of an existing device, the dredging work of the oil outlet is completed in the mode that a stirring rod is inserted into the oil outlet to smash EVA (Ethylene Vinyl Acetate) blockages, but the mode greatly abrades the inner wall of the oil outlet, so that the oil outlet cannot be dredged. And the fragmented blockages are small in particle, so that subsequent separation and recycling are not facilitated. The two ceramic electric heating jackets are installed on the two sides of the outer wall of the oil outlet pipe correspondingly. The electric control three-way valve is installed at one end of the oil outlet pipe, an oil discharge port is formed in the upper end of the electric control three-way valve, a waste liquid port is formed in the lower end of the electric control three-way valve, an electric heating wire is installed in the ceramic electric heating jacket, and a heat conduction aluminum sheet is arranged on the inner wall of the ceramic electric heating jacket; and a power connection port is formed in the outer wall of the ceramic electric heating jacket on one side.

Description

Technical Field

[0001] The utility model relates to the technical field of oil outlet dredging devices, in particular to a dredging device for the oil outlet of a vacuum pump. Background Art

[0002] The photovoltaic laminator needs to be evacuated with a vacuum pump. The EVA in the cavity of the photovoltaic laminator melts and gasifies, enters the pump body, cools and solidifies, and is mixed with grease, causing the oil outlet of the vacuum pump to be blocked and the grease filter device to fail, which in turn causes the vacuum pump to malfunction. Therefore, the oil outlet needs to be dredged using a dredging device;

[0003] Existing dredging devices, such as the one with announcement number CN213223601U, are named as a dredging device for the oil outlet of a vacuum pump and a vacuum pump. The dredging device includes a stirring rod and a motor for driving the stirring rod to rotate. One end of the stirring rod is inserted into the oil outlet of the vacuum pump, and the other end is connected to the output end of the motor. The vacuum pump of the present application includes a vacuum pump body, a vacuum pump oil outlet connected to the vacuum pump body, and a dredging device arranged at the vacuum pump oil outlet. The dredging device is the above-mentioned dredging device.

[0004] During the use of the above-mentioned device, the oil outlet is unblocked by inserting a stirring rod into the oil outlet to crush the EVA blockage. However, this method causes great wear on the inner wall of the oil outlet, and the crushed blockage particles are small, which is not conducive to subsequent separation and reuse. Therefore, we propose a vacuum pump oil outlet unblocking device to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of the utility model is to provide a device for unclogging the oil outlet of a vacuum pump, so as to solve the problem that in the process of use of the existing device proposed in the above-mentioned background technology, a stirring rod is inserted into the oil outlet to crush the EVA blockage to complete the unclogging work of the oil outlet, but this method causes greater wear on the inner wall of the oil outlet, and the crushed blockage particles are small, which is not conducive to subsequent separation and reuse.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dredging device for the oil outlet of a vacuum pump, comprising an oil outlet pipe;

[0007] Also includes:

[0008] Two ceramic electric heating jackets are provided and are respectively installed on both sides of the outer wall of the oil outlet pipe;

[0009] An electrically controlled three-way valve is installed at one end of the oil outlet pipe, an oil discharge port is arranged at the upper end of the electrically controlled three-way valve, and a waste liquid port is arranged at the lower end of the electrically controlled three-way valve.

[0010] Preferably, an electric heating wire is installed inside the ceramic electric heating jacket, a heat-conducting aluminum sheet is provided on the inner wall of the ceramic electric heating jacket, and an electrical connection port is installed on the outer wall of the ceramic electric heating jacket on one side.

[0011] Preferably, connecting plates are installed on the upper ends of the ceramic electric heating jackets on both sides, the connecting plates are connected by screws, and the lower ends of the ceramic electric heating jackets on both sides are rotatably connected by hinges.

[0012] Preferably, a pressure sensor is installed on the outer wall of the oil drain port.

[0013] Preferably, a waste liquid tank is provided at the lower end of the waste liquid outlet.

[0014] Preferably, an external threaded joint is installed at the upper end of the waste liquid tank, and an internal threaded joint is installed at the connection between the waste liquid port and the external threaded joint.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. When the utility model is in use, when the pressure sensor at the oil discharge port detects abnormal pressure, it indicates that the oil outlet pipe is blocked. At this time, the pressure sensor feeds back a signal to the controller, drives the electronically controlled three-way valve to switch to the waste liquid outlet passage, and controls the electric heating wire in the ceramic electric heating jacket to operate, heats the temperature in the oil outlet pipe to degrees Celsius, so that it reaches the melting point of EVA, thereby avoiding blockage. This solves the problem that during the use of the existing device, the oil outlet is unblocked by inserting a stirring rod into the oil outlet to crush the EVA blockage, but this method causes greater wear on the inner wall of the oil outlet.

[0017] 2. When the EVA blockage in the heating tube is used, the electric three-way valve is switched to the waste liquid outlet passage, and part of the oil mixed with the EVA melt after heating will flow into the waste liquid tank, thus avoiding the influence of the oil mixed with the EVA melt on the subsequent recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the ceramic electric heating jacket of the utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure between the waste liquid port and the waste liquid tank of the utility model;

[0021] In the figure: 1. Oil outlet pipe; 2. Ceramic electric heating jacket; 3. Electrical connection port; 4. Connecting plate; 5. Screws; 6. Hinge; 7. Electric three-way valve; 8. Oil drain port; 9. Pressure sensor; 10. Waste liquid port; 11. Waste liquid tank; 12. Thermal conductive aluminum sheet; 13. Electric heating wire; 14. Internal threaded joint; 15. External threaded joint. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] See also Figure 1-3 , the utility model provides an embodiment: a dredging device for an oil outlet of a vacuum pump, comprising an oil outlet pipe 1;

[0024] Also includes:

[0025] Two ceramic electric heating jackets 2 are provided and are respectively installed on both sides of the outer wall of the oil outlet pipe 1;

[0026] The electrically controlled three-way valve 7 is installed at one end of the oil outlet pipe 1 . An oil discharge port 8 is disposed at the upper end of the electrically controlled three-way valve 7 , and a waste liquid port 10 is disposed at the lower end of the electrically controlled three-way valve 7 .

[0027] See also Figure 2 An electric heating wire 13 is installed inside the ceramic electric heating jacket 2, and a heat-conducting aluminum sheet 12 is arranged on the inner wall of the ceramic electric heating jacket 2. An electrical connection port 3 is installed on the outer wall of the ceramic electric heating jacket 2 on one side. When the inside of the oil outlet pipe 1 is blocked by the cooled and solidified EVA particles, the ceramic electric heating jacket 2 can rely on the internal electric heating wire 13 to heat the temperature inside the oil outlet pipe 1 to 80 degrees Celsius, so that it reaches the melting point of EVA, allowing it to melt again to avoid blockage. The setting of the heat-conducting aluminum sheet 12 can improve the heat conduction efficiency.

[0028] See also Figure 2 The upper ends of the ceramic electric heating jackets 2 on both sides are installed with connecting pieces 4, and the connecting pieces 4 are connected by screws 5. The lower ends of the ceramic electric heating jackets 2 on both sides are rotatably connected by hinges 6. The ceramic electric heating jackets 2 are hinged 6 opening and closing structures, which are easy to disassemble, maintain and replace.

[0029] See also Figure 1 A pressure sensor 9 is installed on the outer wall of the oil discharge port 8. The pressure sensor 9 can detect the oil discharge pressure of the oil discharge port 8, thereby determining whether the oil outlet pipe 1 is blocked.

[0030] See also Figure 1 A waste liquid tank 11 is provided at the lower end of the waste liquid port 10, and the waste liquid tank 11 is used to hold the oil mixed with the EVA solution after blocking and heating.

[0031] See also Figure 3 An external threaded joint 15 is installed at the upper end of the waste liquid tank 11, and an internal threaded joint 14 is installed at the connection between the waste liquid port 10 and the external threaded joint 15. The waste liquid tank 11 is a threaded detachable structure, which is convenient for regular disassembly to remove internal residual materials.

[0032] Working principle: During normal oil discharge, the electronically controlled three-way valve 7 remains in the oil discharge port 8 passage, and the discharged oil is sent to the circulation recovery device by the pumping device. When the pressure sensor 9 at the oil discharge port 8 detects abnormal pressure, it indicates that the oil outlet pipe 1 is blocked. At this time, the pressure sensor 9 feeds back a signal to the controller, driving the electronically controlled three-way valve 7 to switch to the waste liquid port 10 passage, and controls the electric heating wire 13 in the ceramic electric heating jacket 2 to operate, heating the temperature in the oil outlet pipe 1 to 80 degrees Celsius to reach the melting point of EVA, allowing the re-melted EVA to flow into the waste liquid tank 11 with the oil. After completion, the controller switches the electronically controlled three-way valve 7 to the oil discharge port 8 passage again, and the pumping device continues to operate to recover the oil.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A device for dredging an oil outlet of a vacuum pump, comprising an oil outlet pipe (1); Features: Also includes: Two ceramic electric heating jackets (2) are provided and are respectively installed on both sides of the outer wall of the oil outlet pipe (1); An electrically controlled three-way valve (7) is installed at one end of the oil outlet pipe (1); an oil discharge port (8) is provided at the upper end of the electrically controlled three-way valve (7); and a waste liquid port (10) is provided at the lower end of the electrically controlled three-way valve (7).

2. The dredging device for the oil outlet of a vacuum pump according to claim 1, characterized in that: An electric heating wire (13) is installed inside the ceramic electric heating jacket (2), a heat-conducting aluminum sheet (12) is arranged on the inner wall of the ceramic electric heating jacket (2), and an electrical connection port (3) is installed on the outer wall of one side of the ceramic electric heating jacket (2).

3. The dredging device for the oil outlet of a vacuum pump according to claim 1, characterized in that: The upper ends of the ceramic electric heating jackets (2) on both sides are installed with connecting plates (4), and the connecting plates (4) are connected by screws (5). The lower ends of the ceramic electric heating jackets (2) on both sides are rotatably connected by hinges (6).

4. The dredging device for the oil outlet of a vacuum pump according to claim 1, characterized in that: A pressure sensor (9) is installed on the outer wall of the oil discharge port (8).

5. The dredging device for the oil outlet of a vacuum pump according to claim 1, characterized in that: A waste liquid tank (11) is provided at the lower end of the waste liquid outlet (10).

6. The dredging device for the oil outlet of a vacuum pump according to claim 5, characterized in that: An external threaded joint (15) is installed at the upper end of the waste liquid tank (11), and an internal threaded joint (14) is installed at the connection between the waste liquid port (10) and the external threaded joint (15).

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