An integrated mechanical seal internal circulation cooling alarm system

Abstract

An integrated mechanical seal internal circulation cooling alarm system includes a mechanical seal filter water supply tank that circulates with the mechanical seal inlet and outlet of a centrifugal pump, and a control box for automatically replenishing the mechanical seal filter water supply tank. The mechanical seal filter water supply tank is equipped with a water supply pipe, a mechanical seal return pipe, and a radar level gauge electrically connected to the control box. The mechanical seal water supply inlet of the mechanical seal filter water supply tank is connected to the mechanical seal inlet of the centrifugal pump via a first multi-stage pump. A pressure sensor electrically connected to the control box is installed on the mechanical seal inlet of the centrifugal pump. The control box integrates a signal transmitter for real-time transmission of level / pressure data to a DCS system. The advantages of this invention are: significantly improved coolant recovery rate, water saving, reduced risk of seal failure due to dual-pump redundancy design, improved reliability, and remote alarm control to avoid unplanned downtime losses.

Description

Technical Field

[0001] This utility model relates to the field of industrial equipment sealing technology, specifically to an integrated mechanical seal internal circulation cooling alarm system. Background Technology

[0002] Traditional mechanical seal cooling systems have the following drawbacks:

[0003] 1. Direct discharge of cooling medium: The single-pass flow cooling design results in low water / coolant utilization.

[0004] 2. Risk of operational interruption: Lack of a rapid response mechanism in the event of a sudden insufficient liquid level or pressure drop, leading to seal failure due to dry running.

[0005] 3. Lagging operation and maintenance: Relying on manual inspections, it is impossible to monitor abnormal liquid levels and pressures in real time.

[0006] While existing technologies have independent fluid replenishment or pressure control devices, they have not achieved system integration and closed-loop intelligent control. Utility Model Content

[0007] The purpose of this invention is to address the above-mentioned shortcomings by providing an integrated mechanical seal internal circulation cooling alarm system.

[0008] This utility model includes a mechanical seal filter water replenishment tank that is circulated and connected to the mechanical seal inlet and mechanical seal outlet of a centrifugal pump, and a control box for automatically replenishing the mechanical seal filter water replenishment tank.

[0009] The mechanical seal filter water supply tank is equipped with a water supply pipe, a mechanical seal return water pipe, and a radar level gauge electrically connected to the control box. The mechanical seal water inlet of the mechanical seal filter water supply tank is connected to the mechanical seal water inlet of the centrifugal pump through the first multi-stage pump. A pressure sensor electrically connected to the control box is installed on the mechanical seal water inlet of the centrifugal pump. The control box integrates a signal transmitter for transmitting liquid level / pressure data to the DCS system in real time.

[0010] The mechanical seal filter water supply tank includes a tank body and a filter cartridge. The filter cartridge is rotatably mounted on the upper part of the tank body via a support frame and is connected to the mechanical seal return water pipe. One end of the water supply pipe extends into the tank body, and the outlet of the water supply pipe faces the side wall of the filter cartridge.

[0011] A connecting plate is detachably connected to the top of the filter cartridge. The connecting plate is rotatably connected to the support frame via a bearing. The connecting plate is provided with a clearance hole for the mechanical seal return water pipe. One end of the mechanical seal return water pipe passes through the clearance hole and extends into the filter cartridge.

[0012] The outlet of the water supply pipe is deviated from the axis of the filter cartridge.

[0013] A second multistage pump is installed between the mechanical seal water inlet of the mechanical seal filter water supply tank and the mechanical seal water inlet of the centrifugal pump, which is connected in parallel with the first multistage pump. Both the first and second multistage pumps are equipped with check valves at their outlets.

[0014] The water supply pipe is equipped with a solenoid valve that is electrically connected to the control box.

[0015] The advantages of this invention are: significantly improved coolant recovery rate, water saving, reduced risk of seal failure through dual-pump redundancy design, improved reliability, and remote alarm control to avoid unplanned downtime losses. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the mechanical seal filter water replenishment tank.

[0018] Figure 3 This is a schematic diagram of the layout structure of the water supply pipe and filter cartridge. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0021] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the utility model. Furthermore, if terms such as "first" or "second" appear in the description of this utility model, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] As shown in the attached drawings, this utility model includes a mechanical seal filter water replenishment tank 2 that is circulated and connected to the mechanical seal inlet and mechanical seal outlet of the centrifugal pump 1, and a control box 3 for automatically replenishing the mechanical seal filter water replenishment tank 2.

[0024] The mechanical seal filter water supply tank 2 is equipped with a water supply pipe 4, a mechanical seal return water pipe 5, and a radar level gauge 6 electrically connected to the control box 3. The mechanical seal water inlet of the mechanical seal filter water supply tank 2 is connected to the mechanical seal water inlet of the centrifugal pump 1 through the first multistage pump 7. A pressure sensor 8 electrically connected to the control box 3 is provided on the mechanical seal water inlet of the centrifugal pump 1. The control box 3 integrates a signal transmitter for transmitting liquid level / pressure data to the DCS system in real time. The water supply pipe 4 is equipped with a solenoid valve 19 electrically connected to the control box 3.

[0025] A second multistage pump 17 is provided between the mechanical seal water inlet of the mechanical seal filter water supply tank 2 and the mechanical seal water inlet of the centrifugal pump 1, and is connected in parallel with the first multistage pump 7. A one-way valve 18 is provided on the outlet of both the first multistage pump 7 and the second multistage pump 17.

[0026] The mechanical seal water of centrifugal pump 1 flows back to the mechanical seal filter water supply tank 2 for filtration and cooling. Then, after being pressurized by the first multi-stage pump 7, it re-enters centrifugal pump 1 for cooling, thus realizing the recycling of the cooling medium.

[0027] The liquid level in the mechanical seal filter water replenishment tank 2 is automatically replenished. The radar level gauge 6 is used to monitor the liquid level in the mechanical seal filter water replenishment tank 2. When the liquid level is ≤30%, the solenoid valve 19 opens to control the replenishment of water. When the liquid level is ≤15%, the audible and visual alarm of the DCS system is triggered to remind the staff that a fault has occurred and to carry out timely inspection and maintenance. When the liquid level is ≥90%, the solenoid valve 19 closes to stop the replenishment.

[0028] Pressure compensation mechanism: When the pressure sensor 8 detects that the main pipeline pressure is <0.2MPa, the second multi-stage pump 17 is automatically started to achieve seamless switching of pressure supply.

[0029] Specifically, the mechanical seal filter water supply tank 2 includes a tank body 10 and a filter cartridge 11. The filter cartridge 11 is rotatably installed in the upper part of the tank body 10 through a support frame 12 and is connected to the mechanical seal return water pipe 5. One end of the water supply pipe 4 extends into the tank body 10, and the outlet of the water supply pipe 4 faces the side wall of the filter cartridge 11.

[0030] A connecting plate 14 is detachably connected to the top of the filter cartridge 11. The connecting plate 14 is rotatably connected to the support frame 12 via a bearing. The connecting plate 14 is provided with a mechanical seal return water pipe clearance hole. One end of the mechanical seal return water pipe 5 passes through the mechanical seal return water pipe clearance hole and extends into the filter cartridge 11.

[0031] The filter cartridge 11 is detachably connected to the connecting plate 14, making it easy to remove the filter cartridge 11 for cleaning the internal dirt.

[0032] The outlet of the water supply pipe 4 is offset from the axis of the filter cartridge 11.

[0033] The top of the tank 10 is open for heat dissipation. The filter cartridge 11 is a movable part that can rotate. When water is added, the water sprayed from the water supply pipe 4 washes the side wall of the filter cartridge 11, causing the filter cartridge 11 to rotate. This uniformly washes the side wall of the filter cartridge 11, removing the dirt clogging it and ensuring the normal filtration function of the filter cartridge 11. In this case, the outlet of the water supply pipe 4 has a flat structure to increase the washing area and washing force.

Claims

1. An integrated mechanical seal internal cooling alarm system, characterized by It includes a mechanical seal filter water replenishment tank (2) that is circulated with the mechanical seal inlet and mechanical seal outlet of the centrifugal pump (1), and a control box (3) for automatically replenishing the mechanical seal filter water replenishment tank (2). The mechanical seal filter water supply tank (2) is equipped with a water supply pipe (4), a mechanical seal return water pipe (5), and a radar level gauge (6) electrically connected to the control box (3). The mechanical seal water supply port of the mechanical seal filter water supply tank (2) is connected to the mechanical seal water inlet of the centrifugal pump (1) through the first multi-stage pump (7). A pressure sensor (8) electrically connected to the control box (3) is provided on the mechanical seal water inlet of the centrifugal pump (1). The control box (3) is equipped with a signal transmitter for transmitting liquid level / pressure data to the DCS system in real time.

2. An integrated mechanical seal internal cooling alarm system as claimed in claim 1, wherein The mechanical seal filter water supply tank (2) includes a tank body (10) and a filter cartridge (11). The filter cartridge (11) is rotatably installed above the tank body (10) via a support frame (12) and is connected to the mechanical seal return water pipe (5). One end of the water supply pipe (4) extends into the tank body (10), and the outlet of the water supply pipe (4) faces the side wall of the filter cartridge (11).

3. The integrated mechanical seal internal circulation cooling alarm system according to claim 2, characterized in that... The top of the filter cartridge (11) is detachably connected to a connecting plate (14). The connecting plate (14) is rotatably connected to the support frame (12) via a bearing. The connecting plate (14) is provided with a mechanical seal return water pipe clearance hole. One end of the mechanical seal return water pipe (5) passes through the mechanical seal return water pipe clearance hole and extends into the filter cartridge (11).

4. The integrated mechanical seal internal circulation cooling alarm system according to claim 2, characterized in that... The outlet direction of the water supply pipe (4) is deviated from the axis of the filter cartridge (11).

5. An integrated mechanical seal internal circulation cooling alarm system according to claim 1, characterized in that... A second multistage pump (17) is connected in parallel with the first multistage pump (7) between the mechanical seal water supply port of the mechanical seal filter water supply tank (2) and the mechanical seal water inlet of the centrifugal pump (1). A one-way valve (18) is provided on the outlet of both the first multistage pump (7) and the second multistage pump (17).

6. The integrated mechanical seal internal circulation cooling alarm system according to claim 1, characterized in that... The water supply pipe (4) is equipped with a solenoid valve (19) that is electrically connected to the control box (3).

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