Screw pump protection device

Abstract

The utility model discloses a screw pump protection device, which belongs to the technical field of screw pumps, and comprises a pump body and a material storage box, a first material conveying pipe is fixed at the output end of the pump body, a spherical groove is arranged at the intersection of the inner side of the first material conveying pipe, a motor is fixed on the outer side of the first material conveying pipe, and the spherical groove is communicated with the spherical groove. The output end of the motor penetrates through the outer side of the first conveying pipe, extends to the inner side of the first conveying pipe and is fixedly provided with a baffle, a second conveying pipe is fixed to the input end of the pump body, a flowmeter is fixed to the position, close to the end, of the outer side of the second conveying pipe, and an electric valve is fixed to one end of the second conveying pipe; and a third conveying pipe is fixed at one end of the electric valve. When the flowmeter detects that the second conveying pipe does not convey materials, the materials on the inner side of the storage box enter the pump body through the third conveying pipe and the second conveying pipe, so that the pump body is lubricated, dry running of the stator of the single-screw pump can be effectively avoided, abrasion is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of screw pumps, and more specifically, particularly relates to a screw pump protection device. Background Art

[0002] Once a screw pump runs dry, the wear between its rotor and stator rubber bushing will increase sharply. In the case of fluid medium lubrication, the wear will be very slow, but once there is no fluid medium lubrication, after dry running, the stator rubber bushing and the rotor will be severely worn. In the existing screw pump protection device, when the single screw pump stator runs dry, the temperature sensor will detect that the stator temperature continues to rise. When the stator temperature reaches the alarm temperature set by the temperature display controller, a control signal is given to control the on and off of the motor. When overheating is detected, severe wear has already occurred. Therefore, a screw pump protection device is proposed. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a screw pump protection device. When the flow meter detects that the second feed pipe is not delivering feed, the material inside the storage box enters the pump body through the third feed pipe and the second feed pipe, thereby lubricating the pump body to solve the problem of severe wear already occurring when overheating is detected in the above-mentioned background technology.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a screw pump protection device, including a pump body and a storage box, a first material delivery pipe is fixed to the output end of the pump body, a spherical groove is provided at the inner intersection of the first material delivery pipe, a motor is fixed to the outer side of the first material delivery pipe, the output end of the motor passes through the outer side of the first material delivery pipe and extends to the inner side and is fixed with a baffle, a second material delivery pipe is fixed to the input end of the pump body, a flow meter is fixed to the outer side of the second material delivery pipe near the end, an electric valve is fixed to one end of the second material delivery pipe, a third material delivery pipe is fixed to one end of the electric valve, a vent is provided on the top surface of the storage box, a filter block is fixed to the inner side of the vent, and a liquid level meter is fixed to the inner side of the storage box.

[0005] As a preferred technical solution of the present utility model, the first material conveying pipe is a three-way pipe structure, and the interior of the first material conveying pipe is connected with the interior of the material storage box.

[0006] As a preferred technical solution of the utility model, the baffle is a circular structure, and the diameter of the baffle is equal to the diameter of the spherical groove.

[0007] As a preferred technical solution of the utility model, the center of the baffle coincides with the center of the spherical groove, and the outer side of the circumference of the baffle is in sliding contact with the inner side of the spherical groove.

[0008] As a preferred technical solution of the present utility model, the second material conveying pipe is in a T-shaped structure.

[0009] As a preferred technical solution of the present utility model, the interior of the third material conveying pipe is connected with the interior of the material storage box.

[0010] As a preferred technical solution of the present utility model, the interior of the vent is communicated with the interior of the storage box.

[0011] The utility model provides a screw pump protection device, which has the following beneficial effects:

[0012] 1. The screw pump protection device, when the flow meter detects that the second feed pipe does not deliver feed, the material inside the storage box enters the pump body through the third feed pipe and the second feed pipe, thereby lubricating the pump body, which can effectively avoid dry operation of the single screw pump stator, reduce wear and increase service life.

[0013] 2. The screw pump protection device has a reasonable and compact structure design and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic diagram of the overall structure of a screw pump protection device.

[0015] Figure 2 The utility model is a schematic diagram of the disassembled structure of a screw pump protection device.

[0016] Figure 3 The utility model is a screw pump protection device Figure 2 A is an enlarged schematic diagram.

[0017] In the figure: 1. pump body; 2. storage box; 3. first feed pipe; 4. spherical tank; 5. motor; 6. baffle; 7. second feed pipe; 8. flow meter; 9. electric valve; 10. third feed pipe; 11. vent; 12. filter block; 13. liquid level meter. DETAILED DESCRIPTION

[0018] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0019] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] See also Figures 1 to 3 The utility model provides a technical solution: a screw pump protection device, including a pump body 1 and a storage box 2, a first material delivery pipe 3 is fixed to the output end of the pump body 1, a spherical groove 4 is opened at the inner intersection of the first material delivery pipe 3, a motor 5 is fixed to the outer side of the first material delivery pipe 3, the output end of the motor 5 passes through the outer side of the first material delivery pipe 3 and extends to the inner side and is fixed with a baffle 6, a second material delivery pipe 7 is fixed to the input end of the pump body 1, a flow meter 8 is fixed to the outer side of the second material delivery pipe 7 near the end, an electric valve 9 is fixed to one end of the second material delivery pipe 7, a third material delivery pipe 10 is fixed to one end of the electric valve 9, and the storage box 2 A vent 11 is provided on the top surface, a filter block 12 is fixed inside the vent 11, a liquid level gauge 13 is fixed inside the storage box 2, the first delivery pipe 3 is a three-way pipe structure, the interior of the first delivery pipe 3 is connected with the interior of the storage box 2, the baffle 6 is a circular structure, the diameter of the baffle 6 is equal to the diameter of the spherical groove 4, the center of the baffle 6 coincides with the center of the spherical groove 4, the outer circumference of the baffle 6 is in sliding contact with the inner side of the spherical groove 4, the second delivery pipe 7 is a T-shaped structure, the interior of the third delivery pipe 10 is connected with the interior of the storage box 2, and the interior of the vent 11 is connected with the interior of the storage box 2;

[0022] When the single screw pump stator runs dry, the flow meter 8 detects that the second feed pipe 7 does not deliver feed, and the flow meter 8 feeds back a signal to the external control box. The control box sends a signal to the electric valve 9 and the motor 5. The electric valve 9 opens, so that the third feed pipe 10 and the second feed pipe 7 are connected. Due to the suction force generated by the pump body 1, the material inside the storage box 2 enters the pump body 1 through the third feed pipe 10 and the second feed pipe 7, thereby lubricating the pump body 1. At the same time, the motor 5 drives the baffle 6 to rotate, so that the baffle 6 Plate 6 blocks one end of the first material delivery pipe 3 flowing to the outside, and the material flows back to the storage box 2 through the first material delivery pipe 3, and this cycle is repeated to avoid dry operation of the single-screw pump stator. At the same time, the pump body 1 can not necessarily operate and continue to generate suction. When the flow meter 8 detects that there is feeding in the second material delivery pipe 7, the motor 5 drives the baffle 6 back to its original position to block the passage to the storage box 2. At the same time, the electric valve 9 closes the third material delivery pipe 10. Through the above process, the dry operation of the single-screw pump stator can be effectively avoided, wear can be reduced, and the service life can be increased.

[0023] Specific usage and function of this embodiment: When the stator of the single screw pump is running dry, the flow meter 8 detects that the second feed pipe 7 does not deliver feed, and the flow meter 8 feeds back the signal to the external control box. The control box sends a signal to the electric valve 9 and the motor 5, and the electric valve 9 is opened, so that the third feed pipe 10 is connected to the second feed pipe 7. Due to the suction generated by the pump body 1, the material inside the storage box 2 enters the pump body 1 through the third feed pipe 10 and the second feed pipe 7, thereby lubricating the pump body 1. At the same time, the motor 5 drives the baffle 6 to rotate, so that the baffle 6 blocks one end of the first feed pipe 3 flowing to the outside, and the material flows back to the storage box 2 through the first feed pipe 3, so as to circulate back and forth to avoid the dry operation of the single screw pump stator. At the same time, the pump body 1 can not necessarily run and continue to generate suction. When the flow meter 8 detects that there is feed in the second feed pipe 7, the motor 5 drives the baffle 6 back to its original position to block the passage to the storage box 2. At the same time, the electric valve 9 closes the third feed pipe 10.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A screw pump protection device, comprising a pump body (1) and a material storage box (2), characterized in that: A first material delivery pipe (3) is fixed to the output end of the pump body (1), a spherical groove (4) is provided at the inner intersection of the first material delivery pipe (3), a motor (5) is fixed to the outer side of the first material delivery pipe (3), the output end of the motor (5) passes through the outer side of the first material delivery pipe (3) and extends to the inner side and is fixed with a baffle (6), a second material delivery pipe (7) is fixed to the input end of the pump body (1), a flow meter (8) is fixed to the outer side of the second material delivery pipe (7) near the end, an electric valve (9) is fixed to one end of the second material delivery pipe (7), and a third material delivery pipe (10) is fixed to one end of the electric valve (9), a vent (11) is provided on the top surface of the material storage box (2), a filter block (12) is fixed to the inner side of the vent (11), and a liquid level meter (13) is fixed to the inner side of the material storage box (2).

2. A screw pump protection device according to claim 1, characterized in that: The first material conveying pipe (3) is a three-way pipe structure, and the interior of the first material conveying pipe (3) is connected to the interior of the material storage box (2).

3. A screw pump protection device according to claim 1, characterized in that: The baffle plate (6) has a circular structure, and the diameter of the baffle plate (6) is equal to the diameter of the spherical groove (4).

4. A screw pump protection device according to claim 1, characterized in that: The center of the baffle (6) coincides with the center of the spherical groove (4), and the outer side of the circumference of the baffle (6) is in sliding contact with the inner side of the spherical groove (4).

5. A screw pump protection device according to claim 1, characterized in that: The second material conveying pipe (7) has a T-shaped structure.

6. A screw pump protection device according to claim 1, characterized in that: The interior of the third material conveying pipe (10) is connected to the interior of the material storage box (2).

7. A screw pump protection device according to claim 1, characterized in that: The interior of the vent (11) is communicated with the interior of the material storage box (2).

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