Mechanical seal cooling system

Abstract

The utility model discloses a mechanical seal cooling system, and belongs to the technical field of pump cooling. The mechanical seal cooling system comprises a material conveying pump, a mechanical seal structure is arranged on the material conveying pump, a cooling cavity is formed in the outer side of the mechanical seal structure, one end of the cooling cavity is connected with a liquid inlet pipe, the other end of the cooling cavity is connected with a liquid outlet pipe, and the liquid inlet pipe is communicated with the liquid outlet pipe through a cooling water tank. A cooling water pump is arranged between the liquid inlet pipe and the cooling water tank; a current sensor is arranged on the cooling water pump and electrically connected with the controller, the controller is electrically connected with the alarm and the relay, and the relay is electrically connected with the material conveying pump. The starting control of the material conveying pump is linked to the mechanical seal cooling water pump, so that the material conveying pump can be started after the cooling water pump is started, the mechanical seal is prevented from being damaged by high temperature, and the normal operation of production is ensured.

Description

Technical Field

[0001] This application relates to a mechanical seal cooling system, belonging to the field of pump cooling technology. Background Technology

[0002] In the metallurgical and chemical industries, material transfer pumps account for more than 50% of the entire production equipment. To reduce the impact of pump water entering the process on the product and to lower production costs, pump shaft seals have gradually transitioned from packing seals to mechanical seals. However, in actual operation, mechanical seals have a relatively short service life. This is because the mechanical seals of material transfer pumps rely entirely on an external cooling water system for cooling. In actual production, situations frequently arise where the material transfer pump is running, but the cooling water pump for the mechanical seal is not running or has malfunctioned and stopped. This leads to the failure of the cooling water system for the mechanical seal, causing high-temperature damage to the mechanical seal, increasing pump operating costs, and affecting production efficiency. Utility Model Content

[0003] To address the aforementioned issues, this application proposes a mechanical seal cooling system. By interlocking the start-up control of the material conveying pump with the mechanical seal cooling water pump, the material conveying pump can only start after the cooling water pump is turned on, thus preventing high-temperature damage to the mechanical seal and ensuring normal production operation.

[0004] This utility model provides the following technical solution:

[0005] A mechanical seal cooling system includes a material conveying pump, on which a mechanical seal structure is provided, and a cooling chamber is provided on the outer side of the mechanical seal structure. One end of the cooling chamber is connected to an inlet pipe, and the other end is connected to an outlet pipe. The inlet pipe and the outlet pipe are connected through a cooling water tank, and a cooling water pump is provided between the inlet pipe and the cooling water tank.

[0006] The cooling water pump is equipped with a current sensor, which is electrically connected to the controller. The controller is electrically connected to the alarm and the relay, and the relay is electrically connected to the material conveying pump.

[0007] Optionally, a thermoelectric cooling fin is provided on the outside of the cooling water tank, and the cold end of the thermoelectric cooling fin is in contact with the cooling water tank.

[0008] Optionally, a fan is also provided on the outside of the cooling water tank, and the thermoelectric cooling fins are located between the cooling water tank and the fan.

[0009] Optionally, the cooling chamber is provided with a throttling orifice plate, a first partition plate and a second partition plate. The throttling orifice plate is radially arranged between the cooling chamber and the mechanical seal structure, and the first partition plate and the second partition plate are staggered along the axial direction of the mechanical seal structure.

[0010] Optionally, the first baffle is perpendicular to the orifice plate, one end of the first baffle passes through the orifice plate and is connected to the cooling cavity, and the other end of the first baffle has a gap with the cooling cavity.

[0011] Optionally, the second baffle is perpendicular to the orifice plate, one end of the second baffle is connected to the orifice plate, and the other end is connected to the cooling chamber.

[0012] Optionally, a filter is provided between the cooling water pump and the cooling water tank.

[0013] Optionally, the mechanical seal structure includes a stationary ring and a rotating ring, wherein a graphite ring is disposed on the stationary ring, and the end face of the rotating ring slides in contact with the end face of the graphite ring.

[0014] Optionally, the mechanical seal structure further includes a bellows connected to the end of the rotating ring away from the stationary ring.

[0015] Optionally, the alarm may include a sound player and / or a warning light.

[0016] The beneficial effects that this application may produce include, but are not limited to:

[0017] The mechanical seal cooling system provided in this application includes a cooling chamber, an inlet pipe, an outlet pipe, a cooling water tank, and a cooling water pump. It can continuously remove the heat generated during the operation of the mechanical seal, preventing material aging, deformation, or wear caused by high temperatures and extending the service life of the mechanical seal structure. By setting up a current sensor, controller, alarm, and relay, the operating current of the cooling water pump can be monitored in real time to determine whether the cooling water pump is in normal operating condition. If it is operating normally, the alarm will not sound, the relay will remain closed, and the material conveying pump will be powered on and running normally. If it is not operating normally, the alarm will sound and the power supply to the material conveying pump will be cut off through the relay, so that the material conveying pump can only start after the cooling water pump is turned on, thus solving the safety problem of mechanical seals under high-temperature conditions. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the material conveying pump involved in the embodiments of this application;

[0020] Figure 2 This is a schematic diagram of the mechanical seal cooling system according to an embodiment of this application;

[0021] Figure 3This is a block diagram illustrating the working principle of the mechanical seal cooling system according to an embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the cooling cavity structure involved in the embodiments of this application;

[0023] List of components and reference numerals:

[0024] 1. Material conveying pump; 2. Mechanical seal structure; 3. Cooling chamber; 4. Inlet pipe; 5. Outlet pipe; 6. Cooling water tank; 7. Cooling water pump; 8. Thermoelectric cooling fins; 9. Fan; 10. Throttling orifice plate; 11. First baffle; 12. Second baffle; 13. Filter; 14. Stationary ring; 15. Dynamic ring; 16. Graphite ring; 17. Bellows. Detailed Implementation

[0025] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0026] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0028] Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0032] Reference Figure 1-4 This application describes a mechanical seal cooling system according to the present application.

[0033] The mechanical seal cooling system according to this embodiment includes a material conveying pump 1, a mechanical seal structure 2 is provided on the material conveying pump 1, and a cooling chamber 3 is provided on the outer side of the mechanical seal structure 2 to solve the safety problem of the mechanical seal under high temperature conditions; one end of the cooling chamber 3 is connected to an inlet pipe 4, and the other end is connected to an outlet pipe 5. The inlet pipe 4 and the outlet pipe 5 are connected through a cooling water tank 6. A cooling water pump 7 is provided between the inlet pipe 4 and the cooling water tank 6, which can continuously remove the heat generated during the operation of the mechanical seal, prevent material aging, deformation or wear caused by high temperature, thereby extending the service life of the mechanical seal structure 2 and ensuring its sealing performance.

[0034] A current sensor is installed on the cooling water pump 7 to monitor its operating current in real time, thereby determining whether it is operating normally. The current sensor is electrically connected to the controller to receive the signals collected by the current sensor. The controller is electrically connected to the alarm and relay. The relay is electrically connected to the material conveying pump 1. The controller analyzes the current data. If a fault is detected, it will trigger the alarm to alert the operator to check and handle the problem in time. On the other hand, the controller will cut off the power supply to the material conveying pump 1 through the relay, forcibly stopping the machine to prevent high temperature damage to the mechanical seal. If no fault is detected, the alarm will not sound, the relay will remain closed, and the material conveying pump 1 will operate normally. By interlocking the start-up control of the material conveying pump 1 with the mechanical seal cooling water pump 7, the material conveying pump 1 can only start after the cooling water pump 7 is turned on. The entire system operates stably, providing reliable cooling protection for the mechanical seal of the material conveying pump 1 and avoiding equipment damage or other malfunctions caused by overheating.

[0035] In this embodiment, the controller is preferably a PLC controller, but other devices with computing and control capabilities can also be selected. Those skilled in the art can make the selection according to the actual situation.

[0036] This invention does not limit the type of material conveying pump 1.

[0037] In one implementation, a thermoelectric cooling fin 8 is provided on the outside of the cooling water tank 6. The cold end of the thermoelectric cooling fin 8 is in contact with the cooling water tank 6. Through the Peltier effect, it actively absorbs heat and directly and rapidly cools the liquid in the cooling water tank 6, so that the temperature of the cooling water tank 6 can be maintained within a suitable range, thereby improving the cooling capacity of the entire cooling system.

[0038] As one implementation, a fan 9 is also provided on the outside of the cooling water tank 6, and the thermoelectric cooling fin 8 is located between the cooling water tank 6 and the fan 9. This can accelerate the airflow at the hot end of the thermoelectric cooling fin 8, thereby more effectively removing heat and avoiding a decrease in cooling performance due to excessively high hot end temperature.

[0039] In one embodiment, a throttling orifice plate 10, a first baffle plate 11, and a second baffle plate 12 are provided inside the cooling chamber 3. The throttling orifice plate 10 is radially arranged between the cooling chamber 3 and the mechanical seal structure 2. The first baffle plate 11 and the second baffle plate 12 are staggered along the axial direction of the mechanical seal structure 2. On the one hand, this can throttle the cooling medium entering the cooling chamber 3, so that the cooling medium is evenly distributed in the cooling chamber 3, avoiding the cooling medium from directly rushing towards the mechanical seal structure 2, causing local over-cooling or uneven cooling. On the other hand, it guides the cooling medium to form an S-shaped flow path in the cooling chamber 3, increasing the residence time and flow path of the cooling medium in the cooling chamber 3, so that the cooling medium can fully absorb the heat generated by the mechanical seal structure 2 and improve the cooling effect.

[0040] In one embodiment, the first partition 11 is perpendicular to the orifice plate 10. One end of the first partition 11 passes through the orifice plate 10 and is connected to the cooling chamber 3. The other end of the first partition 11 has a gap with the cooling chamber 3, which can guide the cooling medium to flow in an orderly manner in the cooling chamber 3, improve the cooling efficiency, and effectively reduce the temperature of the mechanical seal structure 2.

[0041] In one embodiment, the second partition 12 is perpendicular to the orifice plate 10. One end of the second partition 12 is connected to the orifice plate 10, and the other end is connected to the cooling chamber 3. This further optimizes the flow path of the cooling medium in the cooling chamber 3, making the flow path of the cooling medium in the cooling chamber 3 longer, so that it can fully exchange heat with the mechanical seal structure 2 and improve the cooling effect.

[0042] As one implementation, a filter 13 is provided between the cooling water pump 7 and the cooling water tank 6 to intercept impurities, particles and other contaminants in the cooling water, preventing them from entering the cooling water pump 7 and other components of the cooling system, thus ensuring the normal operation of the cooling system.

[0043] In this embodiment, the cooling water pump 7 is a circulating pump, which has good sealing effect and low requirements for the quality of the working fluid. However, in other embodiments, the selection of the cooling water pump 7 is not limited to this, and a suitable type can be selected according to actual needs.

[0044] It should be noted that the cooling water pump 7 adopts an isobaric design to ensure a constant pressure value within the system, making it easier for operators to control the pressure value during operation.

[0045] In one embodiment, the mechanical seal structure 2 includes a stationary ring 14 and a rotating ring 15. A graphite ring 16 is provided on the stationary ring 14. The end face of the rotating ring 15 slides in contact with the end face of the graphite ring 16, which can form a good fit, effectively prevent media leakage, and ensure the sealing performance of the mechanical seal structure 2.

[0046] In one embodiment, the mechanical seal structure 2 also includes a bellows 17, which is connected to the end of the rotating ring 15 away from the stationary ring 14. The elasticity of the bellows 17 compensates for the pressure between the rotating ring 15 and the stationary ring 14, ensuring that the stationary ring 14 and the rotating ring 15 are always tightly fitted, thereby improving the sealing reliability and service life.

[0047] In one implementation, the alarm includes a sound player and / or a warning light, which can emit an alarm sound and / or illuminate or flash the warning light when a malfunction occurs, alerting staff to handle the situation promptly.

[0048] When in use, the cooling water pump 7 is started. The current sensor collects the current information in the power supply harness of the cooling water pump 7 and transmits the current information to the controller. The controller converts the current information into data. When the data is less than or greater than a preset threshold, it indicates that the current in the power supply harness is too low or too high, and the cooling water pump 7 is not operating normally. The controller then sends a command to the alarm, the alarm starts to sound, and the power supply to the material conveying pump 1 is cut off through the relay, forcing it to stop. When the cooling water pump 7 is operating normally, the alarm will not sound, the relay will remain closed, and the material conveying pump 1 will operate normally with power.

[0049] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0050] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A mechanical seal cooling system comprising a material transfer pump provided with a mechanical seal structure, characterized by, A cooling chamber is provided on the outside of the mechanical seal structure. One end of the cooling chamber is connected to an inlet pipe, and the other end is connected to an outlet pipe. The inlet pipe and the outlet pipe are connected through a cooling water tank. A cooling water pump is provided between the inlet pipe and the cooling water tank. The cooling water pump is equipped with a current sensor, which is electrically connected to the controller. The controller is electrically connected to the alarm and the relay, and the relay is electrically connected to the material conveying pump.

2. The mechanical seal cooling system of claim 1, wherein, The outside of the cooling water tank is provided with a thermoelectric cooling fin, and the cold end of the thermoelectric cooling fin is in contact with the cooling water tank.

3. The mechanical seal cooling system of claim 2, wherein, A fan is also installed on the outside of the cooling water tank, and the thermoelectric cooling fins are located between the cooling water tank and the fan.

4. The mechanical seal cooling system of claim 1, wherein, The cooling chamber is provided with a throttling orifice plate, a first partition plate and a second partition plate. The throttling orifice plate is radially arranged between the cooling chamber and the mechanical seal structure, and the first partition plate and the second partition plate are staggered along the axial direction of the mechanical seal structure.

5. The mechanical seal cooling system of claim 4, wherein, The first baffle is perpendicular to the orifice plate. One end of the first baffle passes through the orifice plate and is connected to the cooling cavity. There is a gap between the other end of the first baffle and the cooling cavity.

6. The mechanical seal cooling system of claim 4, wherein, The second baffle is perpendicular to the orifice plate. One end of the second baffle is connected to the orifice plate, and the other end is connected to the cooling chamber.

7. The mechanical seal cooling system of claim 1, wherein, A filter is installed between the cooling water pump and the cooling water tank.

8. The mechanical seal cooling system of claim 1, wherein, The mechanical seal structure includes a stationary ring and a rotating ring. A graphite ring is disposed on the stationary ring, and the end face of the rotating ring slides in contact with the end face of the graphite ring.

9. The mechanical seal cooling system of claim 8, wherein, The mechanical seal structure also includes a bellows, which is connected to the end of the rotating ring away from the stationary ring.

10. The mechanical seal cooling system of claim 1, wherein, The alarm includes a sound player and / or a warning light.

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