Novel self-contained purging device of cryogenic liquid pump
By designing a self-sufficient purge device in a low-temperature liquid pump, the rotation of the magnetic block generates current to drive fan sweep, the problem of low-temperature liquid leakage to the motor is solved, and the protection of motor components and the normal operation of the pump is achieved.
Patent Information
- Application Number
- CN202420343567.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-23
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-02-23
AI Technical Summary
When the existing low-temperature liquid pumps are running for a long time, the low-temperature liquid will leak from the gap between the transmission shaft, sealer, and volute and spread to the motor, causing the motor components to be easily damaged at low temperatures and cannot work normally.
A new self-sufficient purge device for low temperature liquid pump is designed. By rotating the magnetic blocks installed on the transmission shaft, the induction coil generates current, drives the external fan to rotate, blows the room temperature air to the low temperature, gasifies and blows out leakage. low temperature liquid.
It effectively prevents low-temperature liquid from leaking into the motor, avoids damage to the motor components, improves the normal working life of the pump, and improves the purge effect through the fan-shaped structure of the magnetic block and the shaft sleeve.
Smart Images
Figure CN222502036U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cryogenic liquid pumps, in particular to a novel self-contained purge device for a cryogenic liquid pump. Background Art
[0002] A cryogenic liquid pump (cryo pump for short) is a special pump used to transport cryogenic liquids (such as liquid oxygen, liquid nitrogen, liquid argon, etc.) in petroleum, air separation and chemical plants. In air separation, it is mainly used to transport liquid products, such as liquid oxygen pumps, liquid nitrogen pumps, liquid argon pumps and other product pumps. A cryogenic liquid pump is used to transport cryogenic liquids. However, when the existing cryogenic liquid pump runs for a long time, the cryogenic liquid leaks from the gaps between the drive shaft, sealer, and volute, and spreads to the motor, causing the motor components to be easily damaged at low temperatures and unable to work normally. Utility Model Content
[0003] In view of the problems existing in the above-mentioned background technology, the utility model proposes a novel self-contained purge device for a cryogenic liquid pump. The utility model solves the problem that when the cryogenic liquid pump runs for a long time, the cryogenic liquid leaks from the gap between the transmission shaft, the sealer and the volute and spreads to the motor, causing the motor components to be easily damaged at low temperatures and unable to work normally.
[0004] To this end, the utility model adopts the following technical scheme: a new type of self-contained purge device for a cryogenic liquid pump, the new type of self-contained purge device for a cryogenic liquid pump includes a drive motor, a transmission shaft, an intermediate frame, a volute and an impeller, the drive shaft is connected and installed on the motor shaft of the drive motor through a transmission interlocking mechanism, the intermediate frame is installed on the side of the drive motor, the volute is installed on one side of the intermediate frame, and the impeller is arranged in the volute and is transmission-connected to the drive shaft.
[0005] The structure of the transmission interlocking mechanism is as follows: a positioning hole and a shoulder are provided on the transmission shaft, a slotted sleeve is installed on the transmission shaft, the slotted sleeve has 6 evenly distributed inclined grooves, a magnetic block is installed on each inclined groove, the magnetic block and the sleeve are fan-shaped as a whole, one end face of the slotted sleeve is against the shoulder of the transmission shaft, and the other end is fixed to the transmission shaft by a set screw.
[0006] The utility model can achieve the following beneficial effects: the motor of the utility model drives the impeller to rotate through the transmission shaft, and the magnetic block arranged on the transmission shaft rotates, so that the induction coil generates current, drives the external fan to rotate, blows the normal temperature air outside the equipment to the low temperature, vaporizes the leaked low-temperature liquid, and blows it out. The magnetic block and the shaft sleeve form an overall fan-shaped structure, which can greatly improve the blowing effect even at high-speed rotation. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1It is a structural schematic diagram of the utility model.
[0008] Figure 2 It is a schematic diagram of the structure of the utility model in a side view direction.
[0009] Figure 3 for Figure 1 Schematic diagram of the structure at point A in the middle.
[0010] Figure 4 Schematic diagram of the shaft sleeve structure. DETAILED DESCRIPTION
[0011] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings. The described embodiments are only for illustration and explanation of the present invention and do not constitute the sole limitation of the present invention.
[0012] like Figure 1-Figure 4 As shown, the utility model includes a driving motor 6, a transmission shaft 5, an intermediate frame 2, a volute 1 and an impeller 3. The transmission shaft 5 is connected and installed on the motor shaft of the driving motor 6 through a transmission interlocking mechanism, the intermediate frame 2 is installed on the side of the driving motor 6, the volute 1 is installed on one side of the intermediate frame 2, and the impeller 3 is arranged in the volute 1 and is transmission-connected to the transmission shaft 5.
[0013] The structure of the transmission interlocking mechanism of this embodiment is as follows: a positioning hole and a shoulder are provided on the transmission shaft 5, a slotted sleeve 8 is installed on the transmission shaft, and the slotted sleeve 8 has 6 evenly distributed inclined grooves, and a magnetic block 7 is installed on each inclined groove. The magnetic block 7 and the sleeve 8 are fan-shaped as a whole, and one end face of the slotted sleeve 8 is against the shoulder of the transmission shaft 5, and the other end is fixed to the transmission shaft 5 by a set screw 10. A sealer 4 is provided between the impeller 3 and the intermediate frame 2. An induction coil 11 is provided on each support shaft located in the middle of the intermediate frame 2. Each induction coil 11 is connected to a connection switch 13 through a wire 14, and is connected to an external fan 12.
[0014] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A new type of cryogenic liquid pump self-contained purge device, characterized in that: The novel self-contained purge device for a cryogenic liquid pump comprises a drive motor (6), a transmission shaft (5), an intermediate frame (2), a volute (1) and an impeller (3); the drive shaft (5) is connected and installed on the motor shaft of the drive motor (6) through a transmission interlocking mechanism; the intermediate frame (2) is installed on the side of the drive motor (6); the volute (1) is installed on one side of the intermediate frame (2); and the impeller (3) is arranged in the volute (1) and is transmission-connected to the drive shaft (5).
2. According to claim 1, a novel cryogenic liquid pump self-contained purge device is characterized in that: The structure of the transmission interlocking mechanism is as follows: a positioning hole and a shoulder are provided on the transmission shaft (5), a slotted sleeve (8) is installed on the transmission shaft, the slotted sleeve (8) has 6 evenly distributed inclined grooves, a magnetic block (7) is installed on each inclined groove, the magnetic block (7) and the sleeve (8) are fan-shaped as a whole, one end face of the slotted sleeve (8) is against the shoulder of the transmission shaft (5), and the other end is fixed to the transmission shaft (5) by a set screw (10).
3. A novel cryogenic liquid pump self-contained purge device according to claim 2, characterized in that: A sealer (4) is provided between the impeller (3) and the intermediate frame (2).
4. A novel cryogenic liquid pump self-contained purge device according to claim 3, characterized in that: Each supporting shaft located in the middle of the intermediate frame (2) is provided with an induction coil (11).
5. A novel cryogenic liquid pump self-contained purge device according to claim 4, characterized in that: Each of the induction coils (11) is connected to a connection switch (13) via a conductor (14), and is connected to an external fan (12).