Compressed air purging and cutting device
By introducing a temperature sensor and linkage control device into the melt booster pump, the problem of excessive cooling of the mechanical seal when the melt booster pump is unexpectedly shut down is solved, ensuring safe and rapid recovery of production.
Patent Information
- Application Number
- CN202520529493.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-24
AI Technical Summary
In existing polyester production, when the melt booster pump unexpectedly stops, the compressed air purging cannot be stopped in time, leading to excessive cooling of the mechanical seal, melt solidification, delay in accident handling, and the risk of escalating the accident.
Design a compressed air purging and shut-off device. The device detects the mechanical seal temperature using a temperature sensor and controls a solenoid valve to shut off the compressed air, preventing the mechanical seal temperature from dropping too quickly. The device achieves automatic control through linkage control.
It enables automated shut-off of compressed air purging in the event of an unexpected shutdown of the melt booster pump, preventing melt solidification and promoting rapid production recovery.
Smart Images
Figure CN223894368U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of polyester production technology, specifically to a compressed air purging and cutting device. Background Technology
[0002] In polyester production, melt booster pumps operate in high-temperature environments and deliver high-temperature melts. To protect the equipment, the mechanical seals of the pumps need to be purged with compressed air to prevent overheating and damage. However, compressed air purging typically lacks remote or automatic control capabilities and can only be performed manually. If the melt booster pump unexpectedly stops and the compressed air is not stopped in time, the mechanical seal may overcool, causing the melt inside the pump to solidify. This makes it difficult to restart the booster pump, delaying the handling of the accident and posing a potential risk of escalation.
[0003] Based on the above, this utility model proposes a compressed air purging and cutting device, which can effectively solve the above problems. Utility Model Content
[0004] The purpose of this invention is to provide a compressed air purging and shut-off device. This device allows a temperature sensor to detect the real-time temperature of the mechanical seal when the melt booster pump unexpectedly stops. When the real-time temperature falls below a safety threshold, the linkage control device immediately closes the solenoid valve, thereby cutting off the compressed air and stopping the purging process. This prevents the temperature of the mechanical seal from dropping too quickly, which could cause the melt inside the pump to solidify due to cooling, thus facilitating rapid production recovery.
[0005] This utility model is achieved through the following technical solution:
[0006] A compressed air purging and cutting-off device includes a melt booster pump, the melt booster pump is provided with an output shaft, one end of the output shaft is equipped with a mechanical seal device, the mechanical seal device is connected to a temperature sensor, one side of the mechanical seal device is connected to an air inlet pipe, the air inlet pipe is connected to a solenoid valve, and both the temperature sensor and the solenoid valve are electrically connected to a linkage control device.
[0007] According to the above technical solution, as a further preferred technical solution, the linkage control device is equipped with a control panel.
[0008] According to the above technical solution, as a further preferred technical solution, the mechanical seal device is provided with an air inlet, and the air inlet is connected to an air inlet pipe.
[0009] According to the above technical solution, as a further preferred technical solution, the temperature sensor includes a temperature probe that extends into the interior of the mechanical seal device.
[0010] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0011] This utility model provides a compressed air purging and shut-off device. When the melt booster pump stops unexpectedly, the temperature sensor can detect the real-time temperature of the mechanical seal device. When the real-time temperature is lower than the safety threshold, the linkage control device can immediately control the solenoid valve to close, thereby cutting off the compressed air and stopping the purging. This avoids the temperature of the mechanical seal device dropping too quickly, which would cause the melt in the pump body to solidify due to cooling, thus facilitating the rapid recovery of production. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation
[0013] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.
[0014] A compressed air purging and cutting-off device includes a melt booster pump 1, the melt booster pump 1 is provided with an output shaft 2, one end of the output shaft 2 is equipped with a mechanical seal device 3, the mechanical seal device 3 is connected to a temperature sensor 4, one side of the mechanical seal device 3 is connected to an air inlet pipe 5, the air inlet pipe 5 is connected to a solenoid valve 6, and both the temperature sensor 4 and the solenoid valve 6 are electrically connected to a linkage control device 7.
[0015] Furthermore, in another embodiment, the linkage control device 7 is provided with a control panel 71. By providing the control panel, users can easily monitor and adjust the equipment's operating status (such as temperature thresholds), improving the convenience and accuracy of operation.
[0016] Furthermore, in another embodiment, the mechanical seal device 3 has an air inlet 31, which is connected to the air inlet pipe 5.
[0017] Furthermore, in another embodiment, the temperature sensor 4 includes a temperature probe 41 that extends into the interior of the mechanical seal 3.
[0018] Based on the description and drawings of this utility model, those skilled in the art can easily manufacture or use the compressed air purging and cutting device of this utility model, and can produce the positive effects described in this utility model.
[0019] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "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 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, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.
[0020] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model 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.
[0021] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A compressed air purging and cutting device, characterized in that: The device includes a melt booster pump (1), which is equipped with an output shaft (2). One end of the output shaft (2) is fitted with a mechanical seal device (3). The mechanical seal device (3) is connected to a temperature sensor (4). One side of the mechanical seal device (3) is connected to an air inlet pipe (5). The air inlet pipe (5) is connected to a solenoid valve (6). The temperature sensor (4) and the solenoid valve (6) are both electrically connected to a linkage control device (7).
2. The compressed air purging and cutting-off device according to claim 1, characterized in that: The linkage control device (7) is equipped with a control panel (71).
3. The compressed air purging and cutting-off device according to claim 1, characterized in that: The mechanical sealing device (3) has an air inlet (31), which is connected to the air inlet pipe (5).
4. The compressed air purging and cutting-off device according to claim 1, characterized in that: The temperature sensor (4) includes a temperature probe (41) that extends into the interior of the mechanical seal (3).