Dry burning prevention structure of submersible pump

Abstract

The utility model belongs to the technical field of submersible pumps, and particularly relates to a dry burning prevention structure of a submersible pump, which comprises a pump body and a pump cover, the pump cover is fixedly connected to the right end of the pump body, the middle position of the right end of the pump cover is fixedly connected with a liquid inlet pipe, and the outer side of the pump body is fixedly connected with an outer frame. The inner end and the outer end of the pump body are connected with a water pumping mechanism, the water pumping mechanism comprises a bunching unit and a water pumping unit, the bunching unit is arranged at the outer end of the pump body, and the water pumping unit is arranged in the pump body. When the dry burning preventing structure of the submersible pump is used, the pull rope is taken down from the outer end of the cylinder, then the submersible pump is put into a river for pumping water, then the motor in the submersible pump is started, an output shaft of the motor rotates to drive the sealing plate and the impeller to rotate together, water is pumped into the pump cover from the liquid inlet pipe and then flows into the connecting pipe, and then the water is discharged into the river. And then the water flows into the outer frame at the outer end of the pump body and is discharged from the water outlet pipe at the other end for water pumping.

Description

Technical Field

[0001] The utility model relates to the technical field of submersible pumps, in particular to a dry burning prevention structure of a submersible pump. Background Art

[0002] Submersible pumps are important equipment for extracting water from deep wells. When in use, the entire unit dives into the water to extract groundwater to the surface. It is used for domestic water, mine rescue, industrial cooling, farmland irrigation, seawater lifting, ship loading, and can also be used for fountain landscapes.

[0003] The currently used submersible well pumps often have the problem that the stainless steel impeller will be corroded during use, and the service life of the product is short.

[0004] For example, a submersible pump disclosed in Chinese patent CN206329508U has a groove on the side wall of the boss, and a seal is provided in the groove. The setting of the seal can achieve a tight seal between the boss and the motor sleeve, thereby preventing water from penetrating into the interior of the motor sleeve through the gap, thereby preventing the drive shaft from being corroded. The materials of the impeller cooperate with each other, which can, on the one hand, avoid wear of the impeller, and on the other hand, play a corrosion-resistant role, thereby increasing the service life of the impeller.

[0005] However, the existing submersible pumps have certain drawbacks when in use. The submersible pumps are cooled by water during operation. When the water supply is cut off, the pump itself cannot be cooled. If the time is too long, the coil insulation will not meet the standards due to high temperature and will eventually burn out.

[0006] For this reason, we urgently need to provide a submersible pump dry-burning prevention structure that is easy to take out. Utility Model Content

[0007] The purpose of the utility model is to provide a structure for preventing dry burning of a submersible pump, so as to solve the problem that the existing submersible pumps mentioned in the above background technology have certain disadvantages when in use. The submersible pumps are cooled by water during operation. When the water supply is cut off, the water pump itself cannot be cooled. If the time is too long, the coil insulation will not meet the standard due to high temperature and will eventually burn out.

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a dry-burning prevention structure for a submersible pump, comprising a pump body and a pump cover, wherein the pump cover is fixedly connected to the right end of the pump body, a liquid inlet pipe is fixedly connected to the middle position of the right end of the pump cover, an outer frame is fixedly connected to the outer side of the pump body, a pumping mechanism is connected to the inner and outer ends of the pump body, and the pumping mechanism comprises a wire harness unit and a pumping unit, the wire harness unit is arranged at the outer end of the pump body, and the pumping unit is arranged inside the pump body.

[0009] The wiring unit includes a cylinder, a sliding plate, a pressure plate, a threaded rod, a rocker and a pull rope. The cylinder is fixedly connected to the middle position of the outer front end of the outer frame, the sliding plate is connected to the inside of the cylinder, the pressure plate is fixedly connected to the outer end of the sliding plate, the threaded rod is fixedly connected to the middle position of the inner right end of the cylinder, the rocker is fixedly connected to the right end of the threaded rod, and one end of the pull rope is fixedly connected to the outside of the cylinder.

[0010] The pumping unit includes a motor, a sealing plate, an impeller, a connecting pipe and a water outlet pipe. The motor is fixedly connected to the inner side of the pump body, the sealing plate is fixedly connected to the right end of the output shaft of the motor, the impeller is fixedly connected to the right side of the sealing plate at an equal distance, the connecting pipe is fixedly connected to the inner upper end of the pump cover, and the water outlet pipe is fixedly connected to the left side of the inner upper end of the outer frame.

[0011] A further improvement is that a sliding groove is opened at the upper and lower ends of the interior of the cylinder, a circular hole is opened at the middle position of the interior of the pressure plate, the outer sides of the upper and lower ends of the sliding plate are slidingly connected to the inner side of the sliding groove, and the outer side of the cylinder is slidingly connected to the inner side of the circular hole, so that when the sliding plate moves, it can only slide along the inner side of the sliding groove.

[0012] A further improvement is that a threaded hole is opened in the middle position of the inner front end of the cylinder, and the outer side of the threaded rod is threadedly connected to the inner side of the threaded hole, so that when the rocker is rotated to drive the threaded rod in the threaded hole to rotate, the threaded rod can move relative to the cylinder.

[0013] A further improvement is that the front side of the sliding plate abuts against the rear end of the threaded rod, the pull rope is wrapped around the outside of the cylinder, and the rear side of the pressure plate abuts against the outer front end of the pull rope, so that when the threaded rod is driven backward by rotating the rocker to push the sliding plate backward, the pressure plate can be driven backward along the outside of the cylinder.

[0014] A further improvement is that the outer edge of the sealing plate is slidably connected to the inner left end of the pump cover, so that when the motor is started and its output shaft rotates, the sealing plate is driven to rotate, so that when the impeller on the right end rotates together, the water at the outer end of the pump body can be sucked into the space between the impellers from the liquid inlet pipe, and then flows into the connecting pipe under the action of centrifugal force.

[0015] A further improvement is that the end of the connecting pipe away from the pump cover is fixedly connected to the right upper end of the inner outer frame, so that water entering the connecting pipe will flow into the outer frame again and then be discharged from the water outlet pipe at the other end.

[0016] In summary, the present application discloses a dry burning prevention structure for a submersible pump.

[0017] According to the technical solution, during the operation of the submersible pump, the output shaft of the starting motor rotates to drive the sealing plate to rotate, so that the impeller at the right end rotates together, and the water at the outer end of the pump body can be sucked into the space between the impellers from the liquid inlet pipe, and then flows into the connecting pipe under the action of centrifugal force, and then flows into the outer frame at the outer end of the pump body, and then is discharged from the water outlet pipe at the other end. Therefore, when no water enters the submersible pump from the liquid inlet pipe, the water in the outer frame will not be discharged from the water outlet pipe, so that some water will remain in the outer frame, which plays a role in cooling and dissipating heat for the submersible pump and preventing the submersible pump from drying out.

[0018] Furthermore, before the submersible pump is put into water as a whole, the pull rope is removed from the outside of the cylinder, and then the submersible pump is put into water, while the end of the pull rope away from the outer frame is left on the ground, so that when taking the submersible pump, the submersible pump can be pulled out of the water by only pulling up the pull rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0020] Figure 2 This is a structural diagram of the wiring unit of the present invention;

[0021] Figure 3 This is a schematic diagram of the cylinder structure of the utility model;

[0022] Figure 4 It is a cross-sectional view of the main structure of the utility model.

[0023] In the figure: 1. Pump body; 2. Pump cover; 3. Liquid inlet pipe; 4. Outer frame; 501. Cylinder; 502. Sliding plate; 503. Pressure plate; 504. Threaded rod; 505. Rocker; 506. Pull rope; 601. Motor; 602. Sealing plate; 603. Impeller; 604. Connecting pipe; 605. Outlet pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figures 1-4 , the utility model provides a technical solution: Example

[0026] A dry burning prevention structure for a submersible pump includes a pump body 1 and a pump cover 2. The pump cover 2 is fixedly connected to the right end of the pump body 1. A liquid inlet pipe 3 is fixedly connected to the middle position of the right end of the pump cover 2. The outer side of the pump body 1 is fixedly connected to an outer frame 4. The inner and outer ends of the pump body 1 are connected to a pumping mechanism. The pumping mechanism includes a wire harness unit and a pumping unit. The wire harness unit is arranged at the outer end of the pump body 1, and the pumping unit is arranged inside the pump body 1.

[0027] The harness unit includes a cylinder 501, a sliding plate 502, a pressure plate 503, a threaded rod 504, a rocker 505, and a pull rope 506. The cylinder 501 is fixedly connected to the middle position of the outer front end of the outer frame 4, the sliding plate 502 is connected to the inside of the cylinder 501, and the pressure plate 503 is fixedly connected to the outer end of the sliding plate 502. The upper and lower ends of the cylinder 501 are provided with a chute, and the middle position of the pressure plate 503 is provided with a circular hole. The upper and lower ends of the sliding plate 502 are slidably connected to the inner side of the chute, and the outer side of the cylinder 501 is slidably connected to the inner side of the circular hole. Therefore, when the sliding plate 502 moves, it can only slide along the inner side of the chute, and at the same time, the sliding plate 502 will slide along the outer side of the cylinder 501, thereby limiting the movement of the sliding plate 502 and the pressure plate 503.

[0028] Threaded rod 504 is fixedly connected to the center of the right end of cylinder 501. Rocker 505 is fixedly connected to the right end of threaded rod 504. One end of pull cord 506 is fixedly connected to the outside of cylinder 501. A threaded hole is defined in the center of the front end of cylinder 501. The outside of threaded rod 504 is threadedly connected to the inside of the hole. Rotating rocker 505 drives threaded rod 504 in the hole, causing it to move relative to cylinder 501.

[0029] The front side of the sliding plate 502 abuts against the rear end of the threaded rod 504, the drawstring 506 is wound around the outside of the cylinder 501, and the rear side of the pressing plate 503 abuts against the front end of the outside of the drawstring 506. Thus, when the rocker 505 is rotated to move the threaded rod 504 backward, pushing the sliding plate 502 backward, the pressing plate 503 is driven backward along the outside of the cylinder 501, clamping and securing the drawstring 506 wound around the cylinder 501. Example

[0030] On the basis of Example 1: the pumping unit includes a motor 601, a sealing plate 602, an impeller 603, a connecting pipe 604 and a water outlet pipe 605. The motor 601 is fixedly connected to the inner side of the pump body 1, the sealing plate 602 is fixedly connected to the right end of the output shaft of the motor 601, the impeller 603 is fixedly connected to the right side of the sealing plate 602 at an equal distance, the connecting pipe 604 is fixedly connected to the inner upper end of the pump cover 2, and the water outlet pipe 605 is fixedly connected to the left side of the inner upper end of the outer frame 4. The outer edge of the sealing plate 602 is slidably connected to the inner left end of the pump cover 2. Thus, when the motor 601 is started, its output shaft rotates and drives the sealing plate 602 to rotate, so that when the impeller 603 at the right end rotates together, the water at the outer end of the pump body 1 can be sucked into the space between the impeller 603 from the liquid inlet pipe 3, and then flows into the connecting pipe 604 under the action of centrifugal force.

[0031] One end of the connecting pipe 604 away from the pump cover 2 is fixedly connected to the right side of the inner upper end of the outer frame 4. Thereby the water entering the connecting pipe 604 will flow into the outer frame 4 again and then be discharged from the water outlet pipe 605 at the other end.

[0032] Working principle: When in use, first remove the pull rope 506 from the outer end of the cylinder 501, then put the submersible pump into the river to be pumped, then start the motor 601 in the submersible pump, and the output shaft of the motor 601 rotates to drive the sealing plate 602 and the impeller 603 to rotate together, pumping water from the liquid inlet pipe 3 into the pump cover 2, and then flows into the connecting pipe 604, and then flows into the outer frame 4 at the outer end of the pump body 1, and then is discharged from the outlet pipe 605 at the other end to perform the pumping work.

[0033] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

Claims

1. A dry burning prevention structure for a submersible pump, comprising a pump body (1) and a pump cover (2), wherein the pump cover (2) is fixedly connected to the right end of the pump body (1), and is characterized in that: A liquid inlet pipe (3) is fixedly connected to the middle position of the right end of the pump cover (2), an outer frame (4) is fixedly connected to the outer side of the pump body (1), and a pumping mechanism is connected to the inner and outer ends of the pump body (1), the pumping mechanism comprises a wire harness unit and a pumping unit, the wire harness unit is arranged at the outer end of the pump body (1), and the pumping unit is arranged inside the pump body (1); The wiring unit comprises a cylinder (501), a sliding plate (502), a pressure plate (503), a threaded rod (504), a rocker (505) and a pull rope (506), wherein the cylinder (501) is fixedly connected to the middle position of the front end of the outer side of the outer frame (4), the sliding plate (502) is connected to the inside of the cylinder (501), the pressure plate (503) is fixedly connected to the outer end of the sliding plate (502), the threaded rod (504) is fixedly connected to the middle position of the right end of the inner side of the cylinder (501), the rocker (505) is fixedly connected to the right end of the threaded rod (504), and one end of the pull rope (506) is fixedly connected to the outer side of the cylinder (501); The pumping unit comprises a motor (601), a sealing plate (602), an impeller (603), a connecting pipe (604) and a water outlet pipe (605), wherein the motor (601) is fixedly connected to the inner side of the pump body (1), the sealing plate (602) is fixedly connected to the right end of the output shaft of the motor (601), the impeller (603) is fixedly connected to the right side of the sealing plate (602) at an equal distance, the connecting pipe (604) is fixedly connected to the inner upper end of the pump cover (2), and the water outlet pipe (605) is fixedly connected to the left side of the inner upper end of the outer frame (4).

2. The dry burning prevention structure of a submersible pump according to claim 1, characterized in that: The cylinder (501) has sliding grooves at its upper and lower ends, and the pressure plate (503) has a circular hole at its middle position. The outer sides of the upper and lower ends of the sliding plate (502) are slidably connected to the inner sides of the sliding grooves, and the outer side of the cylinder (501) is slidably connected to the inner side of the circular hole.

3. The dry burning prevention structure of a submersible pump according to claim 1, characterized in that: A threaded hole is provided at the middle position of the front end of the cylinder (501), and the outer side of the threaded rod (504) is threadedly connected to the inner side of the threaded hole.

4. The dry burning prevention structure of a submersible pump according to claim 1, characterized in that: The front side of the sliding plate (502) abuts against the rear end of the threaded rod (504), the pull rope (506) is wound around the outside of the cylinder (501), and the rear side of the pressing plate (503) abuts against the front end of the outside of the pull rope (506).

5. The dry burning prevention structure of a submersible pump according to claim 1, characterized in that: The outer edge of the sealing plate (602) is slidably connected to the inner left end of the pump cover (2).

6. The dry burning prevention structure of a submersible pump according to claim 1, characterized in that: One end of the connecting pipe (604) away from the pump cover (2) is fixedly connected to the right side of the upper inner end of the outer frame (4).

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