A canned pump internal gas detection device

Abstract

The present invention provides a device for detecting internal gas in a canned motor pump, belonging to the technical field of gas detection devices. The device comprises a canned motor pump interface, a circulating fluid outlet pipeline, a circulating fluid inlet pipeline a, a circulating pipe, an exhaust chamber, an exhaust pipeline, a flowmeter, and a circulating fluid inlet pipeline b. To address the problem of excessive internal gas entering the motor cavity during canned motor operation, leading to dry grinding of the bearings and the grinding pair, and ultimately damaging the canned motor pump, the device can detect the amount of gas inside the canned motor pump and promptly exhaust the gas before it becomes insufficient to cause damage, thereby preventing damage to the canned motor pump caused by excessive gas and ensuring its safe operation.

Description

Technical Field

[0001] The invention relates to a gas detection device inside a shielded pump, belonging to the technical field of gas detection devices. Background Art

[0002] A canned motor pump is a leak-proof pump consisting of a pump and a canned motor. The pump cavity communicates with the canned motor cavity. Due to its unique structural characteristics, the canned motor's bearings require lubrication and cooling via the fluid circulating in the motor cavity. Excessive gas within the canned pump can enter the motor cavity, causing dry grinding between the bearings and the grinding pair, leading to rapid wear and tear, ultimately damaging the canned pump. During operation, for various reasons, a certain amount of gas may be present in the pipeline conveying medium. This gas can enter the canned motor along with the circulating fluid, posing a significant threat to the safe operation of the canned motor. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art, and further provide a shielded pump internal gas detection device to detect the amount of gas inside the shielded pump and exhaust the gas in time before it causes damage to the shielded pump, so as to avoid damage to the shielded pump caused by excessive gas volume and ensure the safe operation of the shielded pump.

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

[0005] A canned motor pump internal gas detection device includes a canned motor pump interface, a circulating liquid outlet pipeline, a circulating liquid inlet pipeline a, a circulating pipe, an exhaust chamber, an exhaust pipeline, a flowmeter, and a circulating liquid inlet pipeline b. The canned motor pump interface connects the inflow end of the circulating liquid outlet pipeline, the outflow end of circulating liquid inlet pipeline a, and the outflow end of circulating liquid inlet pipeline b. The outflow end of the circulating liquid outlet pipeline and the inflow end of circulating liquid inlet pipeline a are connected to the inflow end of the circulating pipe. The outflow end of the circulating pipe is connected to the exhaust chamber. The top of the exhaust chamber is connected to one end of the exhaust pipeline. An exhaust valve is provided on the exhaust pipeline. The side wall of the exhaust chamber is also connected to the inflow end of the circulating liquid inlet pipeline b. The circulating liquid inlet pipeline b is also provided with a flowmeter. The interface between the outflow end of the circulating pipe and the exhaust chamber is located at the bottom of the exhaust chamber.

[0006] Beneficial effects of the present invention: The present invention determines the amount of gas present in the device by whether the circulating liquid inlet pipeline b mentioned above circulates liquid. When the gas amount reaches a certain level, the flow meter reading is zero, and measures are taken in time to exhaust the shielded pump to avoid damage to the shielded pump caused by excessive gas in the shielded pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is the front view of the internal gas detection device of the shielded pump of the present invention.

[0008] The reference numerals in the figure are: 1 for the shielded pump interface, 2 for the circulating liquid outlet pipeline, 3 for the circulating liquid inlet pipeline a, 4 for the circulating pipe, 5 for the exhaust chamber, 6 for the exhaust pipeline, 7 for the flow meter, and 8 for the circulating liquid inlet pipeline b. DETAILED DESCRIPTION

[0009] The present invention will be further described in detail below with reference to the accompanying drawings: This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method is given, but the protection scope of the present invention is not limited to the following embodiments.

[0010] like Figure 1 As shown, a canned pump internal gas detection device according to this embodiment includes a canned pump interface 1, a circulating liquid outlet pipeline 2, a circulating liquid inlet pipeline a3, a circulating pipe 4, an exhaust chamber 5, an exhaust pipeline 6, a flowmeter 7, and a circulating liquid inlet pipeline b8. The canned pump interface 1 connects the inflow end of the circulating liquid outlet pipeline 2, the outflow end of the circulating liquid inlet pipeline a3, and the outflow end of the circulating liquid inlet pipeline b8. The outflow end of the circulating liquid outlet pipeline 2 and the inflow end of the circulating liquid inlet pipeline a3 are connected to the inflow end of the circulating pipe 4. The outflow end of the circulating pipe 4 is connected to the exhaust chamber 5. The top of the exhaust chamber 5 is connected to one end of the exhaust pipeline 6, which is equipped with an exhaust valve. The side wall of the exhaust chamber 5 is also connected to the inflow end of the circulating liquid inlet pipeline b8, and the circulating liquid inlet pipeline b8 is also equipped with a flowmeter 7. The interface between the outflow end of the circulating pipe 4 and the exhaust chamber 5 is located at the bottom of the exhaust chamber 5.

[0011] When in use, the internal gas detection device of the shielded pump is installed above the shielded pump. During normal operation, the circulating fluid has two circulation paths in the circulation pipeline:

[0012] The first circulation path: The circulating fluid flows back to the shielded pump interface 1 through the shielded pump interface 1, the circulating fluid outlet pipeline 2, and the circulating fluid inlet pipeline a3.

[0013] The second circulation path: The circulating liquid flows back to the shielded pump interface 1 through the shielded pump interface 1, the circulating liquid outlet pipeline 2, the circulating pipe 4, the exhaust chamber 5, the flow meter 7, the circulating liquid inlet pipeline b8, and the shielded pump interface 1.

[0014] When the circulating fluid is circulating normally through the two circulation paths, the flowmeter 7 in the second circulation path indicates a reading greater than zero. If gas is present within the canned motor pump, it will accumulate in the exhaust chamber 5 above. When the gas accumulates to a certain volume, the liquid level in the exhaust chamber 5 drops below the interface between the circulating fluid inlet pipe b8 and the exhaust chamber 5, and the second circulation path is no longer able to participate in the circulation. At this point, the flowmeter 7 displays zero. The zero reading on flowmeter 7 is then used to determine the amount of gas in the exhaust chamber 5. The valve on the exhaust pipe 6 is then opened to vent the canned motor pump, thus preventing damage to the pump caused by the gas.

[0015] The invention determines the amount of gas in the device by whether the circulating liquid inlet pipe b is circulating liquid. When the gas amount reaches a certain level, the flow meter reading is zero, and timely measures are taken to exhaust the shielded pump to avoid damage to the shielded pump caused by excessive gas in the shielded pump.

[0016] The foregoing are merely preferred embodiments of the present invention. These embodiments are all different implementations based on the overall concept of the present invention. The scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A canned motor pump internal gas detection device, characterized in that: The invention comprises a shielded pump interface (1), a circulating liquid outlet pipeline (2), a circulating liquid inlet pipeline a (3), a circulating pipe (4), an exhaust chamber (5), an exhaust pipeline (6), a flow meter (7), and a circulating liquid inlet pipeline b (8). The shielded pump interface (1) is connected to the inflow end of the circulating liquid outlet pipeline (2), the outflow end of the circulating liquid inlet pipeline a (3), and the outflow end of the circulating liquid inlet pipeline b (8). The outflow end of the circulating liquid outlet pipeline (2) and the outflow end of the circulating liquid inlet pipeline a (3) are connected to each other. The inlet end is connected to the inflow end of the circulation pipe (4), the outflow end of the circulation pipe (4) is connected to the exhaust chamber (5), the top of the exhaust chamber (5) is connected to one end of the exhaust pipeline (6), the exhaust pipeline (6) is provided with an exhaust valve, the side wall of the exhaust chamber (5) is also connected to the inflow end of the circulation liquid inlet pipeline b (8), and the circulation liquid inlet pipeline b (8) is also provided with a flow meter (7); the interface between the outflow end of the circulation pipe (4) and the exhaust chamber (5) is located at the bottom of the exhaust chamber (5).

2. The canned motor pump internal gas detection device according to claim 1, characterized in that: During normal operation, the circulating fluid has two circulation paths in the circulation pipeline: the first circulation path is for the circulating fluid to flow back to the shielded pump interface (1) through the shielded pump interface (1), the circulating fluid outlet pipeline (2), the circulating fluid inlet pipeline a (3); the second circulation path is for the circulating fluid to flow back to the shielded pump interface (1) through the shielded pump interface (1), the circulating fluid outlet pipeline (2), the circulation pipe (4), the exhaust chamber (5), the flow meter (7), the circulating fluid inlet pipeline b (8).

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