Flushing device for mechanical seal of chemical centrifugal pump

Abstract

The utility model discloses a flushing device for a mechanical seal of a chemical centrifugal pump, which belongs to the technical field of centrifugal pumps and comprises a liquid sealing tank, a buffer solution inlet and a buffer solution outlet are arranged on the liquid sealing tank, the mechanical seal is arranged on the centrifugal pump, a flushing inlet and a flushing outlet are arranged on the upper side and the lower side of the mechanical seal, and the flushing inlet is connected with the buffer solution inlet. The flushing outlet is connected with the buffer solution outlet, a pressure gauge for detecting mechanical seal leakage is arranged on the liquid sealing tank, a pressure source and an exhaust port are arranged at the top of the liquid sealing tank, and a liquid discharging outlet is formed in the bottom of the liquid sealing tank. The sealing liquid tank is connected to the centrifugal pump, lubricating, cooling, temperature adjusting, flushing, purifying, diluting and flushing away leaked media of the mechanical seal are achieved, the working environment of the mechanical seal is improved, the mechanical seal has the advantages of being efficient, capable of saving energy, stable in operation and the like, the requirements for fluid conveying and pressurizing in the production process of chemical engineering and the like are effectively met, and the working efficiency is improved. The problems that in the material pumping process of a centrifugal pump, a mechanical seal is prone to damage, and on-site leakage is serious are solved.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal pump technology, and in particular relates to a flushing device for the mechanical seal of a chemical centrifugal pump. Background Technology

[0002] Mechanical seals are essential components in power machinery and equipment. In petrochemical transportation systems, media leakage not only affects production but also pollutes the environment, harms human health, and may even lead to major accidents such as fires and explosions. Therefore, reliable and reasonable sealing flushing solutions are needed to maintain equipment operation.

[0003] However, current flushing devices cannot effectively remove heat from the pump or effectively flush out internal sediment, which can easily damage the mechanical seal and cause leakage problems during the centrifugal pump's material delivery process. Utility Model Content

[0004] The purpose of this invention is to provide a flushing device for the mechanical seal of a chemical centrifugal pump, which addresses the problem that current flushing devices cannot effectively remove heat from the pump or effectively flush away internal sediment, leading to easy damage to the mechanical seal and leakage during the pumping process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a flushing device for a mechanical seal of a chemical centrifugal pump, comprising a sealing liquid tank with a buffer inlet and a buffer outlet, a mechanical seal on the centrifugal pump, a flushing inlet and a flushing outlet on the upper and lower sides of the mechanical seal, the flushing inlet being connected to the buffer inlet, the flushing outlet being connected to the buffer outlet, a pressure gauge for detecting leakage of the mechanical seal being provided on the sealing liquid tank, a pressure source and an exhaust port being provided at the top of the sealing liquid tank, and a drain outlet being provided at the bottom of the sealing liquid tank.

[0006] As a further description of the above technical solution:

[0007] The bottom of the sealing tank is provided with a cooling water inlet and a cooling water outlet on both sides.

[0008] As a further description of the above technical solution:

[0009] The sealing tank is provided with a liquid replenishment port on its side, and a valve is provided on the liquid replenishment port.

[0010] As a further description of the above technical solution:

[0011] A pressure transmitter is installed on the side opposite to the exhaust port.

[0012] As a further description of the above technical solution:

[0013] The sealing liquid tank is equipped with a fixed base.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0015] In this invention, a sealing liquid tank is connected to a centrifugal pump. A buffer solution inlet / outlet is installed on the sealing liquid tank for the piping system of flushing, lubrication, and cooling of the mechanical seal. A replenishment port is located at a high position in the sealing liquid tank. Instruments and valves such as level transmitters, pressure gauges, pressure transmitters, and manual replenishment pumps are used to detect mechanical seal leakage. A pressure source inlet / vent is located at the top, and a drain outlet is located at the bottom. A process medium coolant inlet and coolant outlet are also provided. The process medium transfers the cooling buffer solution through the maximum contact surface of the coil inside the sealing liquid tank, achieving lubrication, cooling, temperature regulation, flushing, purification, dilution, and removal of leaked media from the mechanical seal. This improves the working environment of the mechanical seal, giving it advantages such as high efficiency, energy saving, and stable operation. It effectively meets the needs of fluid transportation and pressurization in chemical and other production processes, solving the problems of easy damage to mechanical seals and serious on-site leakage during centrifugal pumping. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of a flushing device for the mechanical seal of a chemical centrifugal pump.

[0018] Figure 2 This is a side view of a flushing device for the mechanical seal of a chemical centrifugal pump.

[0019] Figure 3 This is a cross-sectional view of a flushing device for the mechanical seal of a chemical centrifugal pump.

[0020] Legend:

[0021] 1-Sealing tank; 2-Buffer solution inlet; 3-Buffer solution outlet; 4-Centrifugal pump; 5-Mechanical seal; 6-Flush inlet; 7-Flush outlet; 8-Pressure gauge; 9-Pressure source; 10-Exhaust port; 11-Drain outlet; 12-Cooling water inlet; 13-Cooling water outlet; 14-Replenishment port; 15-Valve; 16-Pressure transmitter; 17-Fixed base. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] 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.

[0024] 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.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of the embodiments of this utility model, it should be noted that the terms "upper" and "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 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.

[0028] Please see Figure 1-3This utility model provides a technical solution: a flushing device for the mechanical seal of a chemical centrifugal pump, including a sealing liquid tank 1, which is provided with a buffer inlet 2 and a buffer outlet 3. A mechanical seal 5 is installed on the centrifugal pump 4. The mechanical seal 5 has flushing inlets 6 and flushing outlets 7 on its upper and lower sides. The flushing inlet 6 is connected to the buffer inlet 2, and the flushing outlet 7 is connected to the buffer outlet 3. A pressure gauge 8 is installed on the sealing liquid tank 1 to detect leakage of the mechanical seal 5. A pressure source 9 and an exhaust port 10 are installed at the top of the sealing liquid tank 1, and a drain outlet 11 is installed at the bottom of the sealing liquid tank 1. The pressure source inlet also serves as an exhaust port; on the one hand, it provides a pressure source to fill the sealing liquid tank with pressurized gas, providing pressure for the mechanical seal; on the other hand, it can discharge gas from the tank to balance the pressure inside the tank.

[0029] The sealing tank 1 has cooling water inlets 12 and cooling water outlets 13 on both sides of its bottom. A process medium coolant is introduced to cool the liquid inside the sealing tank. The coolant exchanges heat with the liquid inside the tank through coils, carrying away heat.

[0030] The sealing tank 1 has a liquid replenishment port 14 on its side, and a valve 15 is installed on the liquid replenishment port 14. This is used to replenish liquid into the sealing tank. The liquid replenishment port is located at a high position in the sealing tank to facilitate the addition of replenishing liquid and ensure an adequate supply of liquid within the tank.

[0031] A pressure transmitter 16 is installed on the corresponding side of the exhaust port 10. This transmitter converts the pressure signal inside the sealing tank into an electrical signal and transmits it to the control system. This helps to accurately control and monitor the pressure inside the sealing tank, ensuring the normal operation of the mechanical seal.

[0032] The sealing liquid tank 1 is provided with a fixed base 17.

[0033] Working Principle: The flushing device includes a 12L sealing liquid tank system. The sealing liquid tank is equipped with a buffer solution inlet / outlet piping system for flushing, lubricating, and cooling the mechanical seal. A replenishment port is located at a high position within the sealing liquid tank, along with level transmitters, pressure gauges, pressure transmitters, a manual replenishment pump, and other instruments and valves for detecting mechanical seal leakage. A pressure source inlet / vent is located at the top, and a drain outlet is located at the bottom. Simultaneously, a process medium coolant inlet and outlet are provided. The process medium transfers the cooling buffer solution through the maximum contact surface of the coils inside the sealing liquid tank, which is used for on-site coolant connection, facilitating operation and forming another closed loop. During operation, it effectively removes heat, lowers the sealing cavity temperature, prevents liquid film vaporization, improves lubrication conditions, prevents dry operation, impurity sedimentation, and air pocket formation, effectively and reliably controls temperature changes, and extends the life of the mechanical seal; it provides reliable assurance for the long-term stable operation of the pump unit.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A flushing device for the mechanical seal of a chemical centrifugal pump, characterized in that, The device includes a sealing tank with a buffer inlet and a buffer outlet, a centrifugal pump with an organic seal, a flushing inlet and a flushing outlet on the upper and lower sides of the organic seal, the flushing inlet being connected to the buffer inlet and the flushing outlet being connected to the buffer outlet, a pressure gauge for detecting leakage of the organic seal being installed on the sealing tank, a pressure source and an exhaust port being installed on the top of the sealing tank, and a drain outlet being installed at the bottom of the sealing tank.

2. The flushing device for the mechanical seal of a chemical centrifugal pump according to claim 1, characterized in that, The bottom of the sealing tank is provided with a cooling water inlet and a cooling water outlet on both sides.

3. The flushing device for the mechanical seal of a chemical centrifugal pump according to claim 2, characterized in that, The sealing tank is provided with a liquid replenishment port on its side, and a valve is provided on the liquid replenishment port.

4. The flushing device for the mechanical seal of a chemical centrifugal pump according to claim 1, characterized in that, A pressure transmitter is installed on the side opposite to the exhaust port.

5. The flushing device for the mechanical seal of a chemical centrifugal pump according to claim 4, characterized in that, The sealing liquid tank is equipped with a fixed base.

Images