Liquid pump device for heat treatment

Abstract

The utility model relates to a kind of liquid below pump devices for heat treatment, vertical installation is on mounting plate, including motor above installation plate and the shaft coupling of connecting motor, pump shaft below installation plate is connected with shaft coupling and the main body is extended in liquid below, main body is connected with oil outlet pipe, and mounting plate is equipped with oil tank, the motor and shaft coupling are installed in oil tank, and oil tank is communicated with oil outlet pipe by oil pipe, and the upper end of oil tank is also communicated with overflow pipe, and one end of overflow pipe is extended in liquid below. The utility model improves the existing liquid below pump, sets up oil tank, part of component is sealed by outside, and oil tank is injected by using its own extraction oil, the utility model structure is simple and reasonable, and air can be avoided well.

Description

Technical Field

[0001] This utility model relates to a submersible pump device. Background Technology

[0002] During the heat treatment of bearings, the oil in the quenching tank splashes up and vaporizes into gas, requiring an oil curtain to seal it below. This necessitates a submersible pump continuously drawing oil to convert it into an oil curtain. A submersible pump is a common fluid transport device, mainly consisting of a motor, pump shaft, and a main body extending below the liquid. The pump shaft is connected to the motor via a coupling. The main body houses the impeller connected to the pump shaft. The motor's rotation, through the coupling and pump shaft, drives the impeller, generating power to propel the liquid flow and draw it to the outlet pipeline for transport. The pump body is equipped with sealing rings and other seals to prevent air or other impurities from entering the pump body. To improve sealing performance, various sealing mechanisms are employed in existing technologies, placing higher demands on the manufacturing of submersible pumps and increasing production costs. However, in actual use, due to prolonged use and aging, some air can still enter, affecting performance. Generally, air easily enters at the coupling and the connection between the coupling and the pump shaft. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings in the prior art, this utility model provides a submersible pump device for heat treatment with improved sealing performance.

[0004] This utility model is achieved through the following technical solution: A submersible pump device for heat treatment includes a mounting plate and a motor, a coupling, a pump shaft, and a pump body, which are mounted on the mounting plate and arranged sequentially from top to bottom. The motor and the coupling that drives the motor are located above the mounting plate, while the pump shaft and the pump body that drives the coupling are located below the mounting plate. The pump body is connected to an oil outlet pipe, and the pump body and part of the pump shaft extend into the oil. The device is characterized in that: an oil storage tank is provided on the mounting plate, the coupling is installed in the oil storage tank, the oil storage tank is connected to the oil outlet pipe through an oil pipe, and one end of an overflow pipe is also connected to the upper end of the oil storage tank. The other end of the overflow pipe extends into the oil.

[0005] Preferably, a valve is provided on the oil pipe.

[0006] Preferably, the oil storage tank is equipped with a liquid level sensor, and the liquid level sensor and the valve are electrically connected to the controller.

[0007] Preferably, the height of the overflow pipe port is lower than the motor position, matching the height of the coupling.

[0008] Preferably, the upper end of the oil tank is covered with a cover, and the cover has a cutout for the coupling to pass through. The beneficial effects of this utility model are as follows: This utility model improves the existing submersible pump by setting up an oil storage tank, sealing some components with external oil seals, and using its own pumping oil to fill the oil storage tank. This utility model has a simple and reasonable structure and can effectively prevent air from entering. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the utility model. Detailed Implementation

[0010] The utility model will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0011] like Figure 1 As shown, a submersible pump device for heat treatment is installed on an oil tank to draw oil into a quenching chamber. It includes a mounting plate 10, and a motor 1, a coupling 2, a pump shaft 5, and a pump body 6, mounted on the mounting plate and arranged sequentially from top to bottom. The motor 1 and the coupling 2, which drives the motor, are located above the mounting plate. The pump shaft 5 and the pump body 6, which drive the coupling, are located below the mounting plate. The pump body is connected to an oil outlet pipe, and the pump body and part of the pump shaft extend below the oil. An impeller is installed inside the pump body. The motor output is transmitted to the pump shaft 5 via the coupling 2, and then to the impeller via the pump shaft. The impeller rotates, pushing the liquid to flow and drawing the liquid to the oil outlet pipe for delivery. Although the submersible pump itself has a sealing structure, the sealing effect deteriorates after prolonged use, allowing some air to enter and affecting its performance. Air is particularly prone to entering at the coupling and the connection between the coupling and the pump shaft. Replacing the sealing mechanism or even the submersible pump in this case would be costly. This invention provides a new solution for modifying existing submersible pumps.

[0012] An oil reservoir 3 is mounted on the mounting plate 10, and the coupling 2 is installed inside the oil reservoir 3. The oil reservoir is connected to the oil outlet pipe 9 via an oil pipe 7, and a valve 8 is installed on the oil pipe. A liquid level sensor is installed inside the oil reservoir. The liquid level sensor and the valve are electrically connected to a controller. The controller determines whether the valve is open or closed based on the liquid level sensed by the liquid level sensor. While the pump body draws oil to the oil outlet pipe 9, it also injects oil into the oil reservoir 3. To prevent excessive oil in the oil reservoir, one end of an overflow pipe 4 is connected to the upper end of the oil reservoir. The other end of the overflow pipe extends below the oil level, so that if there is too much oil, it will be automatically discharged into the oil pool. The height of the end of the overflow pipe 4 is lower than the position of the motor, matching the position of the coupling.

[0013] The components of the submersible pump are arranged from top to bottom, vertically mounted on a mounting plate. The pump body is immersed in the oil tank to draw oil to the outlet pipe. An oil reservoir 3 is located on the mounting plate, connected to the outlet pipe via an oil pipe 7. The oil reservoir is filled with oil drawn by the submersible pump and is used in conjunction with a valve 8. When the oil level is sufficient, the valve can be closed. An overflow pipe 4 is also located at the top of the oil reservoir. When there is excess oil, the excess oil is returned to the oil tank through the overflow pipe 4. The coupling 2 is installed inside the oil reservoir, with the overflow pipe end height matching the coupling position. This means the coupling and its connection to the pump shaft are all immersed in the oil without affecting the motor, thus completely preventing air from entering. Furthermore, the submersible pump's own liquid-drawing function is utilized to inject a portion of the drawn oil into the oil reservoir, and excess oil in the reservoir is discharged through the overflow pipe.

[0014] This invention improves upon existing submersible pumps by incorporating an oil reservoir, sealing some components with external oil seals, and using the pump's own pumping mechanism to fill the reservoir with oil. This invention features a simple and reasonable structure that effectively prevents air from entering.

Claims

1. A submersible pump device for heat treatment, comprising a mounting plate, and a motor, a coupling, a pump shaft, and a pump body mounted on the mounting plate and arranged sequentially from top to bottom, wherein the motor and the coupling driving the motor are located above the mounting plate, the pump shaft driving the coupling and the pump body are located below the mounting plate, the pump body is connected to an oil outlet pipe, and the pump body and part of the pump shaft extend below the oil, characterized in that: The mounting plate is equipped with an oil reservoir, the coupling is installed inside the oil reservoir, the oil reservoir is connected to the oil outlet pipe through an oil pipe, and one end of the oil overflow pipe is also connected to the upper end of the oil reservoir, the other end of the oil overflow pipe extends into the oil.

2. The submersible pump device for heat treatment according to claim 1, characterized in that: A valve is installed on the oil pipe.

3. The submersible pump device for heat treatment according to claim 2, characterized in that: The oil storage tank is equipped with a liquid level sensor, and the liquid level sensor and the valve are electrically connected to the controller.

4. The submersible pump device for heat treatment according to claim 1, characterized in that: The height of the overflow pipe port is lower than the motor position, matching the height of the coupling.

5. A submersible pump device for heat treatment according to claim 1, characterized in that: The oil storage tank is covered with a lid, and the lid has a perforation for the coupling to pass through.

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