Self-priming emergency rescue pump

Abstract

The utility model relates to the technical field of water pumps, and provides a self-priming emergency rescue pump which comprises a pump body, a pump cover, a main impeller, an auxiliary impeller, a filler box and a shaft. A main impeller is arranged in the pump body, is arranged on a shaft, and is fixed through an impeller nut which rotates reversely; the pump body is fixedly connected with the pump cover, the auxiliary impeller is installed in the pump cover, and the auxiliary impeller is fixedly connected with the shaft; the pump cover is fixedly connected with the packing box body, and packing seal is arranged in the packing box body. The auxiliary impeller is fixedly connected with the shaft through the shaft sleeve. The auxiliary impeller is welded to a shaft sleeve, and the shaft sleeve is fixed to a shaft through a key. The self-suction type rescue device has the forced self-suction function and the vacuumizing function, manual water injection is not needed, the rescue pump can be directly started during rescue, and the rescue efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pump technical field especially relates to a self-priming emergency rescue pump. BACKGROUND

[0002] In recent years, the development speed of the emergency rescue pump for coal mine is faster, and the emergency rescue pump plays a vital role in the production of coal mine. When the water disaster accident of coal mine occurs, the emergency rescue pump can timely remove the accumulated water in the underground, ensure the normal operation of the ventilation system in the underground, and thus ensure the safety of the miners; the emergency rescue pump can quickly restore the production order of the coal mine by removing the accumulated water, reduce the loss caused by the water disaster, and protect the normal operation of the coal mine.

[0003] The emergency rescue pump for coal mine is usually designed as a submersible pump, which can stably operate in the high-temperature and high-humidity environment of the mine, and adapt to various complex environments; the emergency rescue pump has the characteristics of large displacement and high efficiency, and can remove a large amount of accumulated water in a short time, thereby gaining valuable time for rescue and disaster relief; in the emergency situation such as water leakage in the mine, the emergency rescue pump can quickly reduce the water level, reduce the damage of the disaster to the facilities and production of the coal mine, and reduce the loss.

[0004] However, the current emergency rescue pump for coal mine still has many deficiencies, such as: the performance of part of the emergency rescue pump is unstable in complex environment, the emergency rescue pump needs to be installed on the rescue vehicle during rescue, and does not have the ability of self-priming and vacuum pumping, the pump body needs to be filled with water before starting the rescue pump, the operation is complex, which greatly reduces the rescue efficiency; the emergency rescue pump does not have the ability of vacuum pumping or has insufficient ability of vacuum pumping, the existence of air will reduce the efficiency of the pump, because the gas will occupy the space of the liquid, affect the flow of the liquid, and easily cause the occurrence of cavitation phenomenon, which will cause damage to the flow parts. In addition, under the condition of high lift or large flow, the wear resistance and corrosion resistance of the equipment may be insufficient, resulting in high equipment failure rate. UTILITY MODEL CONTENTS

[0005] The utility model mainly solves the technical problems that the performance of part of the emergency rescue pump is unstable in complex environment, the emergency rescue pump needs to be installed on the rescue vehicle during rescue, and does not have the ability of self-priming and vacuum pumping, the pump body needs to be filled with water before starting the rescue pump, the operation is complex, which greatly reduces the rescue efficiency, and provides a self-priming emergency rescue pump, which has the functions of forced self-priming and vacuum pumping, does not need manual water injection, and can directly start the rescue pump during rescue, thereby improving the rescue efficiency.

[0006] The utility model provides a self-priming emergency rescue pump, which comprises a pump body, a pump cover, a main impeller, an auxiliary impeller, a packing box and a shaft.

[0007] The pump body is internally provided with the main impeller, the main impeller is installed on the shaft, and the main impeller is fixed through the counter-rotating impeller nut;

[0008] The pump body is fixedly connected to the pump cover, an auxiliary impeller is installed in the pump cover, and the auxiliary impeller is fixedly connected to the shaft;

[0009] The pump cover is fixedly connected to the stuffing box body, and the stuffing box body is equipped with a stuffing seal.

[0010] Preferably, the auxiliary impeller is fixedly connected to the shaft via a shaft sleeve.

[0011] Preferably, the auxiliary impeller is welded to the shaft sleeve, and the shaft sleeve is fixed to the shaft by a key.

[0012] Preferably, the gap between the auxiliary impeller and the pump cover and the gap between the auxiliary impeller and the stuffing box are 0.2-0.3 mm.

[0013] Preferably, the stuffing box is fixedly connected to the bearing frame, and the bearing frame is equipped with a bearing.

[0014] The utility model provides a self-priming emergency rescue pump, the shaft of which can drive the main impeller and the auxiliary impeller to rotate, and cooperate with the flow velocity of water to form a vacuum in the pump body, thereby sucking in liquid to achieve the purpose of self-priming and vacuuming. When in use, the staff only needs to place the emergency rescue pump in the designated position, put the inlet pipe into the water, and directly start the motor to drain the water for rescue. The emergency rescue pump has its own vacuuming and self-priming effects, which avoids the occurrence of artificial water injection, can reduce the installation, disassembly and maintenance costs of the staff at work, save rescue time, and reduce the difficulty and risk of manual operation. The utility model can ensure that there is no gas in the pump by vacuuming, thereby improving the working efficiency of the rescue pump, avoiding the occurrence of cavitation, preventing component damage, and ensuring the stable operation of the emergency rescue pump.

[0015] This self-priming emergency rescue pump features both forced self-priming and vacuum pumping functions. The pump can be activated directly during rescue operations, significantly improving rescue efficiency and making operation more convenient. This pump is also suitable for transporting highly corrosive media, and priming is not required before activation, minimizing damage to personnel and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the self-priming emergency rescue pump provided by the utility model;

[0017] Figure 2 This is a schematic diagram of the main impeller mechanism provided by the present utility model;

[0018] Figure 3 This is a schematic diagram of the auxiliary impeller mechanism provided by the utility model;

[0019] Figure 4 It is a side view of the auxiliary impeller mechanism provided by the utility model.

[0020] Figure numerals: 1, pump body; 2, pump cover; 3, stuffing box; 4, stuffing seal; 5, bearing frame; 6, bearing; 7, auxiliary impeller; 8, shaft sleeve; 9, impeller nut; 10, shaft; 11, main impeller. DETAILED DESCRIPTION

[0021] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, rather than all of its contents.

[0022] like Figure 1 As shown, an embodiment of the present invention provides a self-priming emergency rescue pump, comprising: a pump body 1, a pump cover 2, a main impeller 11, an auxiliary impeller 7, a stuffing box 3 and a shaft 10.

[0023] The pump body 1 adopts a double volute structure to reduce radial force and shaft deflection. Figure 2 As shown, the pump body 1 is equipped with a main impeller 11, which is mounted on the shaft 10 by a key and fixed by a counter-rotating impeller nut 9. The counter-rotating impeller nut 9 is set to achieve a self-locking effect. The faster the main impeller 11 rotates, the tighter the impeller nut 9 is, making the pump structure more stable and safer.

[0024] The pump body 1 is fixedly connected to the pump cover 2 by bolts, and the auxiliary impeller 7 is installed in the pump cover 2, and the auxiliary impeller 7 is fixedly connected to the shaft 10; Figures 3-4 As shown, the auxiliary impeller 7 is fixedly connected to the shaft 10 via a shaft sleeve 8. Specifically, the auxiliary impeller 7 is welded to the shaft sleeve 8, and the shaft sleeve 8 is fixed to the shaft 10 via a key. The rotation of the shaft 10 drives the shaft sleeve 8 and the auxiliary impeller 7 to rotate together.

[0025] The pump cover 2 is fixedly connected to the stuffing box 3 by bolts. The stuffing box 3 is equipped with a stuffing seal 4. During coal mine drainage and rescue, the sewage contains a lot of impurities, and the use of the stuffing seal 4 is more reliable. The stuffing box 3 is fixedly connected to the bearing frame 5, and the bearing frame 5 is equipped with a bearing 6.

[0026] The gap between the auxiliary impeller 7 and the pump cover 2, as well as the gap between the auxiliary impeller 7 and the stuffing box 3, is 0.2-0.3 mm. The setting of this gap is not only related to the stability of the emergency rescue pump, but also directly affects the efficiency of air extraction. Correct gap adjustment can avoid mechanical failures, improve equipment performance, extend the service life of the rescue pump, and reduce noise.

[0027] The working principle of the self-priming emergency rescue pump of the present invention is as follows: when the staff starts the pump, the shaft 10 drives the main impeller 11 and the auxiliary impeller 7 to rotate, and cooperates with the flow velocity of the water to form a vacuum in the pump body 1, thereby sucking in the liquid to achieve the purpose of self-priming and vacuuming. When in use, the staff only needs to place the emergency rescue pump in the designated position, put the inlet pipe into the water, and directly start the motor to drain the water for rescue. The emergency rescue pump has its own vacuuming and self-priming effects, which avoids the occurrence of artificial water injection, can reduce the installation, disassembly and maintenance costs of the staff at work, save rescue time, and reduce the difficulty and risk of manual operation. The utility model can ensure that there is no gas in the pump by vacuuming, thereby improving the working efficiency of the rescue pump, avoiding the occurrence of cavitation, preventing component damage, and ensuring the stable operation of the emergency rescue pump.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications to the technical solutions described in the above embodiments, or equivalent replacement of some or all of the technical features therein, do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-priming emergency rescue pump, characterized in that: include: Pump body (1), pump cover (2), main impeller (11), auxiliary impeller (7), stuffing box (3) and shaft (10); The pump body (1) is provided with a main impeller (11), which is mounted on a shaft (10) and fixed by an impeller nut (9) that rotates in opposite directions. The pump body (1) is fixedly connected to the pump cover (2), an auxiliary impeller (7) is installed in the pump cover (2), and the auxiliary impeller (7) is fixedly connected to the shaft (10); The pump cover (2) is fixedly connected to the stuffing box (3), and a stuffing seal (4) is installed in the stuffing box (3).

2. The self-priming emergency rescue pump according to claim 1, characterized in that: The auxiliary impeller (7) is fixedly connected to the shaft (10) via a shaft sleeve (8).

3. The self-priming emergency rescue pump according to claim 2, characterized in that: The auxiliary impeller (7) is welded to the shaft sleeve (8), and the shaft sleeve (8) is fixed to the shaft (10) via a key.

4. The self-priming emergency rescue pump according to claim 3, characterized in that: The gap between the auxiliary impeller (7) and the pump cover (2) and the gap between the auxiliary impeller (7) and the stuffing box (3) are 0.2-0.3 mm.

5. The self-priming emergency rescue pump according to claim 1, characterized in that: The stuffing box (3) is fixedly connected to the bearing frame (5), and the bearing frame (5) is equipped with a bearing (6).

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