Liquid sealing leakage recovery device

Abstract

The invention relates to a liquid seal leakage recovery device which comprises a lubricating oil mechanical seal recovery system, a medium mechanical seal recovery system, a pressure regulating filter and an explosion-proof control cabinet, and the lubricating oil mechanical seal recovery system comprises a first filtering and collecting tank, a first diaphragm pump, a first switch and a first electromagnetic valve; the medium mechanical seal recovery system comprises a second filtering and collecting tank, a second switch, a second diaphragm pump and a second electromagnetic valve, when the liquid level reaches the high liquid level, the switches are closed, the explosion-proof control cabinet controls the electromagnetic valve to be opened, and gas in the pressure regulating filter drives the diaphragm pump to pump leaked liquid in the filtering and collecting tank back to target equipment; according to the invention, automatic collection and treatment of leaked liquid can be realized, the reliability of equipment operation is improved, and the environmental protection requirement is met.

Description

Technical Field

[0001] The invention belongs to the field of high-speed pump mechanical seals, and in particular relates to a liquid seal leakage recovery device. Background Art

[0002] High-risk chemical media usually contain flammable, explosive or toxic fluids, including high-temperature hot oil pumps, hydrocarbon pumps and toxic and harmful pumps. If leakage occurs on site, it is very likely to cause various dangerous accidents or serious environmental pollution. Relevant fields stipulate that pump equipment must strictly comply with the leakage allowable value of mechanical seal specifications, that is, the leakage per hour is not more than 4ml. However, for high-risk chemical pumps, the working requirement of zero leakage of mechanical seals is usually proposed. Whether the mechanical seal is reliable is an important indicator of whether the rotating equipment can operate normally, but in many cases it is difficult for mechanical seals to achieve zero leakage. Summary of the invention

[0003] The purpose of the present invention is to provide a liquid seal leakage recovery device, which can be used for high-speed pump single-end mechanical seal rotating equipment. When the mechanical seal leaks, this system can collect, filter and pump the leaked medium or lubricating oil, etc., to achieve zero leakage of lubricating oil and pumping medium to the environment and no pump maintenance due to mechanical seal leakage during an overhaul cycle.

[0004] The above-mentioned purpose of the present invention is mainly achieved through the following technical solutions:

[0005] A liquid seal leakage recovery device comprises a lubricating oil mechanical seal recovery system, a medium mechanical seal recovery system, a pressure regulating filter and an explosion-proof control cabinet, wherein the lubricating oil mechanical seal recovery system comprises a first filter collection tank, a first diaphragm pump, a first switch and a first solenoid valve, and the medium mechanical seal recovery system comprises a second filter collection tank, a second switch, a second diaphragm pump and a second solenoid valve; an inlet pipeline of the first filter collection tank is connected to a lubricating oil mechanical seal leakage port, an outlet pipeline is connected to the first diaphragm pump, a first switch is connected to the explosion-proof control cabinet and the first filter collection tank, and the pressure regulating filter is connected to an external gas source; when the first switch is closed, the explosion-proof control cabinet controls the first solenoid valve to open, and the gas in the pressure regulating filter drives the first diaphragm pump to pump the leaked liquid in the first filter collection tank back to a target device; an inlet pipeline of the second filter collection tank is connected to a medium mechanical seal leakage port, and an outlet pipeline is connected to the second diaphragm pump, and the second switch is connected to the explosion-proof control cabinet and the second filter collection tank, and when the second switch is closed, the explosion-proof control cabinet controls the second solenoid valve to open, and the gas in the pressure regulating filter drives the second diaphragm pump to pump the leaked liquid in the second filter collection tank back to the target device.

[0006] The first filter collection tank and the second filter collection tank liquid level sight glasses are marked with low liquid level and high liquid level. When the liquid level reaches the high liquid level, the first switch and the second switch are closed, the explosion-proof control cabinet is connected, and the leaked liquid is pumped back to the target equipment. When the liquid level drops below the low liquid level, the double-level float liquid level switch is disconnected to stop pumping the leaked liquid.

[0007] The first switch and the second switch are double-liquid-level float liquid level switches.

[0008] The first filter collection tank and the second filter collection tank are also marked with a maximum liquid level on the liquid level sight glasses. Ball valves are respectively provided on the inlet pipelines of the first filter collection tank and the second filter collection tank. When the liquid level reaches the maximum liquid level, the ball valve is closed to stop the leakage liquid input.

[0009] The first filter collection tank and the second filter collection tank are provided with leakage liquid outlets at the bottom, and needle valves are provided at the outlets. The needle valves can be opened manually to drain the leakage liquid in the first filter collection tank and the second filter collection tank.

[0010] Check valves are arranged on the first diaphragm pump and the second diaphragm pump to prevent the leaked liquid from flowing back.

[0011] It also includes a bracket, which is a shell structure. The lubricating oil mechanical seal recovery system, the medium mechanical seal recovery system, the pressure regulating filter and the explosion-proof control cabinet are placed in the bracket shell.

[0012] After the device is assembled, connect the power supply of the pressure regulating filter and explosion-proof control cabinet. Turn the knob of the pressure regulating filter until the pressure gauge reading is the main pump inlet medium pressure + 1 bar, turn the power switch of the explosion-proof control cabinet until the power indicator light is on, and the system will enter the automatic operation state.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects:

[0014] (1) When the mechanical seal leaks, the present invention can collect, filter, and pump the leaked medium or lubricating oil, thereby achieving zero leakage of lubricating oil and pumping medium to the environment and no pump maintenance due to mechanical seal leakage within an overhaul cycle, thereby improving the reliability of equipment operation and meeting environmental protection requirements.

[0015] (2) The present invention can uniformly collect and process the leakage of mechanical seals of on-site pump equipment, eliminating the potential safety hazards or mechanical failures caused by leakage of high-risk fluids in the past, and ensuring the safety, continuity, environmental protection and economy of the main machine operation.

[0016] (2) The present invention can operate automatically. When the high-speed pump is working normally, no human intervention is required. If the high-speed pump body is operating abnormally, the system will issue an alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the liquid sealing recovery device of the present invention;

[0018] Figure 2 This is the PID diagram of the liquid sealing recovery device of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] like Figure 1 and Figure 2 As shown, a liquid seal leakage recovery device includes a lubricating oil mechanical seal recovery system, a medium mechanical seal recovery system, a pressure regulating filter 11 and an explosion-proof control cabinet 9, the lubricating oil mechanical seal recovery system includes a first filter collection tank 1, a first diaphragm pump 3, a first switch 5 and a first solenoid valve 7, the medium mechanical seal recovery system includes a second filter collection tank 2, a second switch 6, a second diaphragm pump 4 and a second solenoid valve 8; the inlet pipeline of the first filter collection tank 1 is connected to the lubricating oil mechanical seal leakage port, and the outlet pipeline is connected to the first diaphragm pump 3, the first switch 5 is connected to the explosion-proof control cabinet 9 and the first filter collection tank 1, and the pressure regulating filter 11 is connected to the explosion-proof control cabinet 9 and the first filter collection tank 1. The filter 11 is connected to an external gas source; when the first switch 5 is closed, the explosion-proof control cabinet 9 controls the first solenoid valve 7 to open, and the gas in the pressure regulating filter 11 drives the first diaphragm pump 3 to pump the leaked liquid in the first filter collection tank 1 back to the target device; the inlet pipeline of the second filter collection tank 2 is connected to the medium mechanical seal leakage port, and the outlet pipeline is connected to the second diaphragm pump 4, and the second switch 6 is connected to the explosion-proof control cabinet 9 and the second filter collection tank 2. When the second switch 6 is closed, the explosion-proof control cabinet 9 controls the second solenoid valve 8 to open, and the gas in the pressure regulating filter 11 drives the second diaphragm pump 4 to pump the leaked liquid in the second filter collection tank 2 back to the target device.

[0021] The liquid level sight glasses of the first filter collection tank 1 and the second filter collection tank 2 are marked with low liquid level and high liquid level. When the liquid level reaches the high liquid level, the first switch 5 and the second switch 6 are closed, and the explosion-proof control cabinet 9 is connected to pump the leaked liquid back to the target equipment. When the liquid level drops below the low liquid level, the double liquid level float liquid level switch is disconnected to stop pumping the leaked liquid.

[0022] The first switch 5 and the second switch 6 are double-liquid-level float liquid level switches.

[0023] The maximum liquid level is also marked on the liquid level sight glasses of the first filter collection tank 1 and the second filter collection tank 2. Ball valves are respectively provided on the inlet pipelines of the first filter collection tank 1 and the second filter collection tank 2. When the liquid level reaches the maximum liquid level, the ball valve is closed to stop the leakage liquid input.

[0024] The first filter collection tank 1 and the second filter collection tank 2 are provided with leakage liquid outlets at the bottom, and needle valves are provided at the outlets. The needle valves can be opened manually to drain the leakage liquid in the first filter collection tank 1 and the second filter collection tank 2.

[0025] Check valves are arranged on the first diaphragm pump 3 and the second diaphragm pump 4 to prevent the leaked liquid from flowing back.

[0026] It also includes a bracket 10, which is a shell structure. The lubricating oil mechanical seal recovery system, the medium mechanical seal recovery system, the pressure regulating filter 11 and the explosion-proof control cabinet 9 are placed in the shell of the bracket 10.

[0027] After the device is assembled, connect the power supply of the pressure regulating filter 11 and the explosion-proof control cabinet 9. Turn the knob of the pressure regulating filter 11 until the pressure gauge reading is the main pump inlet medium pressure + 1 bar, turn the power switch of the explosion-proof control cabinet 9 until the power indicator light is on, and the system enters the automatic operation state.

[0028] The above description is only the best specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

[0029] The contents not described in detail in the specification of the present invention belong to the common knowledge of the professionals in this field.

Claims

1. A liquid seal leakage recovery device, characterized in that: The invention comprises a lubricating oil mechanical seal recovery system, a medium mechanical seal recovery system, a pressure regulating filter (11) and an explosion-proof control cabinet (9). The lubricating oil mechanical seal recovery system comprises a first filter collection tank (1), a first diaphragm pump (3), a first switch (5) and a first solenoid valve (7). The medium mechanical seal recovery system comprises a second filter collection tank (2), a second switch (6), a second diaphragm pump (4) and a second solenoid valve (8). The inlet pipeline of the first filter collection tank (1) is connected to the leakage port of the lubricating oil mechanical seal, and the outlet pipeline is connected to the first diaphragm pump (3). The first switch (5) is connected to the explosion-proof control cabinet (9) and the first filter collection tank (1). The pressure regulating filter (11) is connected to an external Gas source; when the first switch (5) is closed, the explosion-proof control cabinet (9) controls the first solenoid valve (7) to open, and the gas in the pressure regulating filter (11) drives the first diaphragm pump (3) to pump the leaked liquid in the first filter collection tank (1) back to the target device; the inlet pipeline of the second filter collection tank (2) is connected to the leakage port of the medium mechanical seal, and the outlet pipeline is connected to the second diaphragm pump (4); the second switch (6) connects the explosion-proof control cabinet (9) and the second filter collection tank (2); when the second switch (6) is closed, the explosion-proof control cabinet (9) controls the second solenoid valve (8) to open, and the gas in the pressure regulating filter (11) drives the second diaphragm pump (4) to pump the leaked liquid in the second filter collection tank (2) back to the target device.

2. A liquid seal leakage recovery device according to claim 1, characterized in that: The first filter collection tank (1) and the second filter collection tank (2) are marked with a low liquid level and a high liquid level on the liquid level sight glasses. When the liquid level reaches the high liquid level, the first switch (5) and the second switch (6) are closed, and the explosion-proof control cabinet (9) is connected to pump the leaked liquid back to the target device. When the liquid level drops below the low liquid level, the double liquid level float liquid level switch is disconnected to stop pumping the leaked liquid.

3. A liquid seal leakage recovery device according to claim 2, characterized in that: The first switch (5) and the second switch (6) are double-liquid-level float liquid level switches.

4. A liquid seal leakage recovery device according to claim 2, characterized in that: The first filter collection tank (1) and the second filter collection tank (2) are also marked with a limit high liquid level on the liquid level sight glass. The first filter collection tank (1) and the second filter collection tank (2) are respectively provided with a ball valve on the inlet pipeline. When the liquid level reaches the limit high liquid level, the ball valve is closed to stop the leakage liquid from entering.

5. A liquid seal leakage recovery device according to claim 1, characterized in that: The first filter collection tank (1) and the second filter collection tank (2) are provided with leakage liquid outlets at the bottom, and needle valves are provided at the outlets. The needle valves can be opened manually to drain the leakage liquid in the first filter collection tank (1) and the second filter collection tank (2).

6. A liquid seal leakage recovery device according to claim 1, characterized in that: Check valves are provided on the first diaphragm pump (3) and the second diaphragm pump (4) to prevent the leaked liquid from flowing back.

7. A liquid seal leakage recovery device according to claim 1, characterized in that: It also includes a bracket (10), which is a shell structure, and a lubricating oil mechanical seal recovery system, a medium mechanical seal recovery system, a pressure regulating filter (11) and an explosion-proof control cabinet (9) are placed in the shell of the bracket (10).

8. A liquid seal leakage recovery device according to claim 1, characterized in that: A pressure gauge is provided on the pressure regulating filter (11). When the system is working, the pressure gauge reading is the main pump inlet medium pressure + 1 bar.

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