Pump machine seal water leakage detection control device

Abstract

The utility model discloses a pump mechanical seal water leakage detection control device which comprises a cooling water inlet pipeline detection system, a cooling water outlet pipeline detection system and a mechanical seal water circulation system, and the cooling water inlet pipeline detection system comprises a pressure transmitter (1), a first electromagnetic flowmeter (2) and a thermal resistor (3), the water outlet pipeline detection system comprises a second electromagnetic flowmeter (4) in flange connection and a PH meter (5) in threaded connection, the mechanical seal water circulation system comprises a mechanical seal water tank (6) with a flange connection port formed in the top, a circulating pump (7) and a radar liquid level meter (8) installed through a flange, and all detection elements are connected into the DCS. Cooling water flow difference, pressure fluctuation, temperature change and PH value abnormity are monitored in real time through the multi-parameter sensor, automatic leakage alarm and circulation control are achieved in combination with the DCS, the operation safety of the mechanical seal is effectively improved, the service life of the mechanical seal is effectively prolonged, and manual inspection cost is reduced.

Description

Technical Field

[0001] This utility patent pertains to the mechanical seal of pumps and relates to a pump seal water leakage detection and control device. Background Technology

[0002] Pumps are used frequently and for various purposes in industrial processes, primarily for the transportation and transfer of liquids. When transporting corrosive media or slurries, the mechanical seal of the pump requires cooling water to protect it. However, the flow rate of the cooling water varies depending on the pump model and the specific mechanical seal, so the flow rate must be adjusted for each pump to meet the cooling requirements of the mechanical seal. A mechanical seal leak could result in either cooling water leaking into the medium or the medium leaking into the cooling water, causing contamination.

[0003] While some improvements exist in existing technologies for monitoring mechanical seal leakage, shortcomings remain. For example, CN219978324U employs flow indicators and conductivity monitoring, but lacks dynamic temperature compensation; CN109282559A's differential pressure and temperature interlock scheme does not consider the applicability of the gas state equation under extreme temperatures; and CN215805253U suffers from response lag due to its intermittent detection method, making it unsuitable for continuous production requirements. Utility Model Content

[0004] The purpose of this invention is to provide a pump sealing water leakage detection and control device to solve the problems mentioned in the background art.

[0005] The technical solution of this utility model to achieve the above objectives is as follows:

[0006] A pump seal water leakage detection and control device, characterized in that it includes a cooling water inlet pipe detection system, a cooling water outlet pipe detection system, and a mechanical seal water circulation system; the cooling water inlet pipe detection system includes a pressure transmitter (1), a first electromagnetic flowmeter (2), and a thermal resistor (3), wherein the pressure transmitter (1) is connected to the cooling water pipe through a pressure tap, and the electromagnetic flowmeter (2) and the thermal resistor (3) are respectively connected to the cooling water inlet pipe through flanges; the cooling water outlet pipe detection system includes a second electromagnetic flowmeter (4) and a pH meter (5), wherein the electromagnetic flowmeter (4) is connected to the cooling water outlet pipe through a pressure tap, and the first electromagnetic flowmeter (2) and the second electromagnetic resistor (3) are respectively connected to the cooling water inlet pipe through flanges; the second electromagnetic flowmeter (4) and the third electromagnetic resistor (5) are connected to the cooling water outlet pipe through a pressure tap, and the first electromagnetic flowmeter (2) and the third electromagnetic resistor (3) are respectively connected to the cooling water inlet pipe through flanges. The magnetic flow meter (4) is connected to the cooling water outlet pipe via a flange, and the pH meter (5) is connected to the cooling water outlet pipe via a thread. The mechanical seal water circulation system includes a mechanical seal water tank (6), a circulation pump (7), and a radar level gauge (8). The mechanical seal water tank (6) has a flange connection port on its top, and the radar level gauge (8) is installed on the mechanical seal water tank (6) through the flange connection port. The pressure transmitter (1), the first electromagnetic flow meter (2), the thermal resistor (3), the second electromagnetic flow meter (4), the pH meter (5), and the radar level gauge (8) are all connected to the DCS system.

[0007] According to the above-mentioned pump sealing water leakage detection and control device, the characteristic is that a root valve is provided between the pressure transmitter (1) and the cooling water pipeline, and the pressure tapping pipe is connected to the cooling water pipeline through the root valve.

[0008] According to the above-mentioned pump sealing water leakage detection and control device, the first electromagnetic flowmeter (2) and the second electromagnetic flowmeter (4) are respectively provided with flange sealing surfaces that match the pipeline at their flange connection points.

[0009] According to the above-mentioned pump sealing water leakage detection and control device, the characteristic is that the thermal resistor (3) adopts a Pt100 type thermal resistor element.

[0010] According to the above-mentioned pump sealing water leakage detection and control device, the characteristic is that the threaded connection of the pH meter (5) adopts NPT tapered pipe thread, and its electrode probe extends to the central axis position of the cooling water outlet pipe.

[0011] According to the above-mentioned pump seal water leakage detection and control device, the top flange connection port of the mechanical seal water tank (6) is located on the right side of the tank body.

[0012] The technical advantages of this invention are as follows: All measuring points installed in the cooling water inlet and outlet pipes are connected to the DCS control system, enabling real-time monitoring of the cooling water pipes. When mechanical seal leakage occurs, timely action is taken to protect the normal operation of the pump. Flow meters are installed in the cooling water inlet and outlet pipes, and a pH meter is installed in the outlet pipe. When the flow difference increases or the pH value becomes abnormal, it can be determined whether the mechanical seal is leaking, thus improving the pump's service life and ensuring normal production operation. Attached Figure Description

[0013] Figure 1 Schematic diagram of the mechanical seal water circulation system;

[0014] Figure 2 This is a diagram of a DCS control system. Detailed Implementation

[0015] The structure of this utility model will now be further described with reference to the accompanying drawings.

[0016] See Figure 1 The pump seal water leakage detection and control device of this utility model includes a cooling water inlet pipe detection system, a cooling water outlet pipe detection system, and a mechanical seal water circulation system. The cooling water inlet pipe detection system includes a pressure transmitter 1, a first electromagnetic flowmeter 2, and a thermal resistor 3. The pressure transmitter 1 is connected to the cooling water pipe via a pressure tap, and the electromagnetic flowmeter 2 and thermal resistor 3 are respectively connected to the cooling water inlet pipe via flanges. The cooling water outlet pipe detection system includes a second electromagnetic flowmeter 4 and a pH meter 5. The electromagnetic flowmeter 4 is connected to the cooling water outlet pipe via a flange, and the pH meter 5 is connected to the cooling water outlet pipe via a thread. The mechanical seal water circulation system includes a mechanical seal water tank 6, a circulating pump 7, and a radar level gauge 8. The mechanical seal water tank 6 has a flange connection port on its top, through which the radar level gauge 8 is installed. The pressure transmitter 1, the first electromagnetic flowmeter 2, the thermal resistor 3, the second electromagnetic flowmeter 4, the pH meter 5, and the radar level gauge 8 are all connected to a DCS system. A root valve is installed between the pressure transmitter 1 and the cooling water pipeline, and the pressure tapping pipe is connected to the cooling water pipeline through this root valve. The flange connections of the first electromagnetic flowmeter 2 and the second electromagnetic flowmeter 4 are respectively equipped with flange sealing surfaces that match the pipeline. Preferably, the thermal resistor 3 uses a Pt100 type thermal resistor element. Preferably, the threaded connection of the pH meter 5 uses an NPT tapered pipe thread, and its electrode probe extends to the center axis of the cooling water outlet pipeline. Preferably, the top flange connection port of the mechanical seal water tank 6 is located on the right side of the tank body.

[0017] Figure 2The field instruments shown include pressure transmitter 1, first electromagnetic flowmeter 2, thermal resistance 3, second electromagnetic flowmeter 4, and pH meter 5. All of these instruments are connected to the DCS control system and, through programming configuration, enable centralized display and management of various real-time monitoring data at the operator station.

[0018] All measuring points installed in the cooling water inlet and outlet pipes of this invention are connected to the DCS control system, enabling real-time monitoring of the cooling water pipes. When mechanical seal leakage occurs, timely action is taken to protect the normal operation of the pump. Flow meters are installed in the cooling water inlet and outlet pipes, and a pH meter is installed in the outlet pipe. When the flow difference increases or the pH value is abnormal, it can be determined whether the mechanical seal is leaking, thereby improving the service life of the pump and ensuring normal production operation.

Claims

1. A pump sealing water leakage detection and control device, characterized in that, The system includes a cooling water inlet pipe detection system, a cooling water outlet pipe detection system, and a mechanical seal water circulation system. The cooling water inlet pipe detection system comprises a pressure transmitter (1), a first electromagnetic flowmeter (2), and a thermal resistor (3). The pressure transmitter (1) is connected to the cooling water pipe via a pressure tap, and the first electromagnetic flowmeter (2) and the thermal resistor (3) are respectively connected to the cooling water inlet pipe via flanges. The cooling water outlet pipe detection system comprises a second electromagnetic flowmeter (4) and a pH meter (5). The second electromagnetic flowmeter (4) is connected to the cooling water outlet pipe via a pressure tap. The pH meter (5) is connected to the cooling water outlet pipe via a flange and is connected to the cooling water outlet pipe via a thread. The mechanical seal water circulation system includes a mechanical seal water tank (6), a circulation pump (7), and a radar level gauge (8). The mechanical seal water tank (6) is provided with a flange connection port on its top, and the radar level gauge (8) is installed on the mechanical seal water tank (6) through the flange connection port. The pressure transmitter (1), the first electromagnetic flow meter (2), the thermal resistor (3), the second electromagnetic flow meter (4), the pH meter (5), and the radar level gauge (8) are all connected to the DCS system.

2. The pump sealing water leakage detection and control device according to claim 1, characterized in that, A root valve is provided between the pressure transmitter (1) and the cooling water pipeline, and the pressure tap is connected to the cooling water pipeline through the root valve.

3. The pump sealing water leakage detection and control device according to claim 1, characterized in that, The flange connection of the first electromagnetic flowmeter (2) and the second electromagnetic flowmeter (4) is respectively provided with a flange sealing surface that matches the pipeline.

4. The pump sealing water leakage detection and control device according to claim 1, characterized in that, The thermal resistor (3) is a Pt100 type thermal resistor element.

5. The pump seal water leakage detection and control device according to claim 1, characterized in that, The pH meter (5) uses NPT tapered pipe thread for its threaded connection, and its electrode probe extends to the central axis of the cooling water outlet pipe.

6. The pump sealing water leakage detection and control device according to claim 1, characterized in that, The top flange connection of the mechanically sealed water tank (6) is located on the right side of the tank body.

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