Leakage backflow structure of pump
By installing a level gauge and an overflow port inside the pump casing, the problems of large pump leakage and poor level control were solved, thus achieving stable pump operation and media recycling.
Patent Information
- Application Number
- CN202520092731.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-01-15
AI Technical Summary
Large leakage and poor liquid level control in the pump design lead to unstable pump operation.
A level gauge and an overflow port are installed inside the pump casing. The liquid leaking from the pump casing through the overflow port flows back to the connecting frame cavity. The liquid is then sent back to the pump inlet through the drain port and pipeline, thus realizing the recycling of the medium and the balance of the liquid level.
Stable control of pump level was achieved, ensuring stable pump operation and enabling the recycling of the medium.
Smart Images
Figure CN223578239U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a backflow structure, particularly relates to a pump's backflow structure which can realize the recycling of medium, guarantee the balance of pump liquid level and make the pump run stably. BACKGROUND
[0002] The pump is designed as a cantilever pump installed vertically, and the pump and the pump cylinder are designed integrally. When the pump is running, the medium enters the pump cylinder through the dynamic and static clearance. Since the leakage is large, the liquid level is not easy to control. In order to guarantee the balance of the liquid level in the pump cylinder, a backflow structure is designed, so that the pump can run stably. SUMMARY
[0003] In view of the above problems, the main purpose of the utility model is to provide a pump's backflow structure which can realize the recycling of medium, guarantee the balance of pump liquid level and make the pump run stably.
[0004] The utility model discloses a pump's backflow structure which solves the above technical problems through the following technical scheme: a pump's backflow structure comprises a pump cylinder, a liquid level meter, a motor, a motor base and a connecting frame.
[0005] The motor is installed on the motor base, the pump cylinder and the motor base are connected by bolts, the upper end of the liquid level meter is fixed on the connecting frame, and the liquid leaks into the cavity of the connecting frame through the gap between the impeller and the port ring of the pump body. An overflow port is arranged on the wall of the connecting frame, a liquid discharge port is arranged on the pump cylinder, and the liquid discharge port is connected to the pump inlet by a liquid discharge pipeline.
[0006] In the embodiment of the utility model, the liquid level meter is welded on the liquid level meter flange, and the liquid level meter flange is fixed on the connecting frame by bolts.
[0007] In the embodiment of the utility model, a boss is arranged on the connecting frame, a circular hole through which the liquid level meter passes is arranged in the boss, a threaded hole is formed in the boss, and the boss is connected to the liquid level meter flange above by screwing.
[0008] In the embodiment of the utility model, the pump cylinder, the motor base and the connecting frame are fixed by screwing.
[0009] In the embodiment of the utility model, the overflow port is a semicircular port with a diameter of 5-10 mm.
[0010] In the embodiment of the utility model, there are several liquid level meters, and the lengths of the liquid level meters are different. The bottom of one of the liquid level meters is slightly higher than the uppermost end of the overflow port.
[0011] In the embodiment of the utility model, the diameter of the liquid discharge pipeline is 10-20 mm.
[0012] The positive progress effect of the utility model lies in: the utility model provides the pump's leakage backflow structure, which has the following advantages compared with common technology: the utility model sets several liquid level meters in the pump barrel, which can detect the liquid level in the pump barrel in real time, and when the liquid level reaches a certain height, the liquid in the pump barrel is discharged through the liquid discharge port. The liquid discharge port is connected to the pump inlet pipeline through a pipeline, and the liquid is sent back to the pump body, realizing the recycling of the medium. The utility model ensures the balance of the pump liquid level, so that the pump can run stably. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is the overall structure schematic view of the utility model.
[0014] Figure 2 It is the partial enlarged view of Figure 1
[0015] The following is the name corresponding to the label in the utility model:
[0016] Pump barrel 1, liquid level meter 2, motor 3, motor base 4, connecting frame 5, impeller 6, guide vane 7, guide vane cover plate 8, overflow port 9, liquid discharge port 10, pump inlet 11, boss 12, liquid level meter flange 13. DETAILED DESCRIPTION
[0017] The following gives the preferred embodiment of the utility model in combination with the drawings to explain the technical scheme of the utility model in detail.
[0018] Figure 1 It is the overall structure schematic view of the utility model, Figure 2 It is the partial enlarged view of Figure 1 as shown in Figure 1 and Figure 2 : the utility model provides a pump's leakage backflow structure, which comprises: pump barrel 1, liquid level meter 2, motor 3, motor base 4, connecting frame 5, impeller 6, guide vane 7, guide vane cover plate 8; the motor 3 is installed on the motor base 4, the pump barrel 1 and the motor base 4 are bolted, the upper end of the liquid level meter 2 is fixed on the connecting frame 5, the liquid is leaked to the connecting frame 5 cavity after passing through the impeller rear port ring gap of the pump body, the overflow port 9 is arranged on the wall of the connecting frame 5, the liquid discharge port 10 is arranged on the pump barrel 1, and the liquid discharge port 10 is connected to the pump inlet 11 through a liquid discharge pipeline.
[0019] In the specific implementation process of the utility model, the liquid level meter 2 can be fixed on the connecting frame 5 in multiple ways. Specifically, the liquid level meter 2 is welded on the liquid level meter flange 13, and the liquid level meter flange 13 is fixed on the connecting frame 5 through bolts.
[0020] The following connecting mode can also be used: the connecting frame 5 is provided with a boss 12, a circular hole through which the liquid level meter 2 passes is arranged in the boss 12, a threaded hole is formed in the boss 12, and the boss 12 is connected with the upper liquid level meter flange 13 in a threaded connection mode.
[0021] The liquid level meter has a plurality of liquid level meters, the lengths of the liquid level meters are different, each liquid level meter is provided with a wire, data is transmitted to a central control system, and real-time liquid levels are displayed. The pump cylinder body 1, the motor base 4 and the connecting frame 5 are fixed in a bolt connection mode, and other modes can also be used for fixation.
[0022] The lowest end of the liquid level meter 2 is not lower than the uppermost end of the overflow port 9. In the utility model, the overflow port 9 is a semicircular port, the diameter ranges from 5 mm to 10 mm, and the diameter of the liquid discharge pipeline ranges from 10 mm to 20 mm. In the specific implementation process, the above parameter ranges can be replaced by other data ranges according to specific on-site use requirements.
[0023] The utility model effectively solves the problem that the liquid level is not easy to control due to large leakage of the pump, thereby ensuring that the liquid level in the pump body is stable and being conducive to stable operation of the pump.
[0024] Liquid is leaked to the connecting frame cavity through the gap between the impeller and the ring after the liquid, and the overflow port is designed on the connecting frame wall, so that the liquid can flow into the pump cylinder body at any time, and the liquid level meter of the utility model can detect the liquid level height of the liquid in the pump cylinder body in real time.
[0025] The pump cylinder body is provided with a liquid discharge port, liquid in the pump cylinder body is discharged through the liquid discharge port, and the leakage backflow in the pump cylinder body is realized. The liquid discharge port is connected with an inlet pipeline, liquid discharged from the liquid discharge port is sent back to the pump inlet through pipeline connection, the liquid reenters the pump body, and the recycling of the medium is realized.
[0026] The utility model adopts a novel balance structure, ensures the balance of the liquid level in the pump body, and is conducive to stable operation of the pump.
[0027] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only used to illustrate the principle of the utility model, various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed, and the scope of protection of the utility model is defined by the appended claims and their equivalents.
Claims
1. A leak back structure for a pump, characterized by: The leakage return structure of the pump comprises a pump cylinder, a liquid level meter, a motor, a motor base and a connecting frame; The motor is installed on the motor base, the pump cylinder and the motor base are bolted, the upper end of the liquid level meter is fixed on the connecting frame, liquid leaks into the cavity of the connecting frame through the gap between the back port ring of the impeller of the pump body, an overflow port is arranged on the wall of the connecting frame, a liquid discharge port is arranged on the pump cylinder, and the liquid discharge port is connected to the pump inlet through a liquid discharge pipeline.
2. The leak return structure of a pump according to claim 1, characterized by: The liquid level meter is welded on the liquid level meter flange, and the liquid level meter flange is fixed on the connecting frame through bolts.
3. The leak return structure for a pump according to claim 1, wherein: A boss is arranged on the connecting frame, a circular hole through which the liquid level meter passes is arranged in the boss, a threaded hole is punched on the boss, and the boss is connected to the liquid level meter flange above in a threaded connection manner.
4. The leak return structure for a pump according to claim 1, characterized by: The pump cylinder, the motor base and the connecting frame are fixed in a bolted manner.
5. The leak return structure for a pump according to claim 1, wherein: The overflow port is a semicircular port with a diameter ranging from 5 mm to 10 mm.
6. The leak return structure of a pump according to claim 1, characterized by: There are several liquid level meters, and the lengths of the liquid level meters are different, wherein the bottom of one of the liquid level meters is slightly higher than the uppermost end of the overflow port.
7. The leak return structure of a pump according to claim 1, characterized by: The diameter of the liquid discharge pipeline ranges from 10 mm to 20 mm.