CN210106190U

CN210106190U - Submerged pump

Info

Publication number: CN210106190U
Application number: CN201920094858.7U
Authority: CN
Inventors: 王金鑫
Original assignee: Jingjiang Huanyu Chemical Equipment Factory
Current assignee: Jingjiang Huanyu Chemical Equipment Factory
Priority date: 2019-01-21
Filing date: 2019-01-21
Publication date: 2020-02-21
Anticipated expiration: 2029-01-21

Abstract

The utility model discloses a submerged pump, including driving motor, motor cabinet, pump cover, the pump body, stay tube, pump shaft, bearing box and drain pipe, the lower extreme of pump shaft is provided with double-deck double-screw bolt, the impeller passes through nut and double-deck double-screw bolt fixed connection, double-deck double-screw bolt includes first layer screw thread post and second floor screw thread post, range upon range of setting of first layer screw thread post and second floor screw thread post, second floor screw thread post sets up the below at first layer screw thread post, second floor screw thread post radius is less than first layer screw thread post. The utility model has the advantages that: fix pump shaft and impeller through double-deck double-screw bolt, double-deck double-screw bolt is two-layer adopts opposite direction's screw respectively, fixes the impeller through the nut to can effectually prevent that the impeller that the pump shaft reversal caused from taking off, and set up to 2 through the submerged partial length of pump shaft and the submerged partial length ratio: 1, can effectual increase pump shaft stability in the rotation process, improve the stability in use of submerged pump.

Description

Submerged pump

Technical Field

The utility model relates to a fluid conveying equipment, in particular to submerged pump.

Background

Submerged pump among the prior art is by each field such as wide application in chemical industry, petroleum, municipal administration and blowdown, and submerged pump has the characteristics that can effectively prevent blockking up, however submerged pump among the prior art leads to stability relatively poor because the continuous increase of lift in the use to submerged pump among the prior art is owing to can take place the condition of reversal in the use, and the impeller takes place the pine easily and takes off, and the setting leads to the condition of droing to take place.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a stability is good, can effectually prevent submerged pump that the impeller drops.

In order to solve the technical problem, the utility model discloses a technical scheme does: a submerged pump comprises a driving motor, a motor base, a pump cover, a pump body, a supporting tube, a pump shaft, a bearing box and a liquid outlet pipe, wherein the driving motor is fixed through the motor base, the lower end of the motor base is fixedly connected with the bearing box, the pump shaft is arranged between the driving motor and the pump body, the pump cover covers the pump body, an impeller is arranged inside the pump body, the upper end and the lower end of the pump shaft are respectively and fixedly connected with a transmission structure inside the driving motor and the impeller inside the pump body, the supporting tube is sleeved outside the pump shaft, the upper end and the lower end of the supporting tube are respectively and fixedly connected with the bearing box and the pump body, the lower end of the liquid outlet pipe is communicated with the pump body, a double-layer stud is arranged at the lower end of the pump shaft, the impeller is fixedly connected with the double-layer stud through a nut, the double-layer stud comprises a first layer of threaded column, the second layer of threaded columns are arranged below the first layer of threaded columns, and the radius of the second layer of threaded columns is smaller than that of the first layer of threaded columns.

Further, the length ratio of the pump shaft liquid lower part to the pump shaft liquid upper part of the pump shaft is 2: 1.

Further, the lower extreme of the pump body is provided with the filter screen.

Furthermore, a connecting support is arranged between the supporting tube and the pump body, and the supporting tube is fixedly connected with the pump body through the connecting support.

Furthermore, an elbow is arranged between the lower end of the liquid outlet pipe and the pump body, and the liquid outlet pipe is communicated with the pump body through the elbow.

Furthermore, a bottom plate is arranged below the bearing box, the upper part of the liquid outlet pipe is fixedly connected with the bottom plate, and the bottom plate is fixedly connected with the supporting pipe and the bearing box respectively.

Furthermore, a first bearing and a second bearing which are sleeved on the pump shaft are arranged in the bearing box, and the first bearing and the second bearing are movably arranged between the pump shaft and the inside of the bearing box respectively.

Possibly, the supporting tube is provided with three sections, and the pump shaft is provided with a shaft sleeve.

Adopt above-mentioned technical scheme, owing to fix pump shaft and impeller through double-deck double-screw bolt, double-deck double-screw bolt is two-layer adopts opposite direction's screw respectively, fixes the impeller through the nut to can effectually prevent that the impeller that the pump shaft reversal caused from taking off, and set up to 2 through the submerged part length and the submerged part length ratio with the pump shaft: 1, can effectual increase pump shaft stability in the rotation process, improve the stability in use of submerged pump.

Drawings

Fig. 1 is a schematic structural diagram of a pump according to the present invention;

fig. 2 is a schematic structural diagram of a three-stage pump in the present invention;

fig. 3 is a schematic structural diagram of a double-layer stud of the present invention.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1-3, the present embodiment discloses a submerged pump, which comprises a driving motor 1, a motor base 2, a pump cover 3, a pump body 4, a support tube 5, a pump shaft 6, a bearing box 7 and a liquid outlet pipe 8, wherein the driving motor 1 is fixed by bolts through the motor base 2, the lower end of the motor base 2 is fixedly connected with the bearing box 7 through bolts, the pump shaft 6 is arranged between the driving motor 1 and the pump body 4, the pump cover 4 is covered by the pump body 4, an impeller 42 is arranged inside the pump body 4, the upper and lower ends of the pump shaft 6 are respectively fixedly connected with a transmission structure inside the driving motor 1 and the impeller 42 inside the pump body 4 through bolts, the support tube 5 is sleeved outside the pump shaft 6, the upper and lower ends of the support tube 5 are respectively fixedly connected with the bearing box 7 and the pump body 4 through bolts, the lower end of the liquid outlet pipe 8 is communicated with the pump body 4, impeller 42 passes through nut cooperation fixed connection through nut and double-deck bolt 9 includes first layer screw thread post 91 and second layer screw thread post 92, and first layer screw thread post 91 and the range upon range of setting of second layer screw thread post 92, second layer screw thread post 92 radius are less than. Feasible, the screw thread direction of first layer screw thread post 91 and second layer screw thread post 92 is opposite, like this, all be provided with not equidirectional nut cooperation screw thread fixed on two rotation directions, can effectually prevent that the impeller that the pump shaft reversal caused from taking off. It is feasible that the ratio of the length of the pump shaft submerged portion to the pump shaft submerged portion of the pump shaft 6 in this embodiment is preferably 2: 1. The stability of pump shaft in rotatory in-process can effectual increase, improve the stability in use of submerged pump.

It is possible that the lower end of the pump body 4 is provided with a filter 41 through which the blockages that may cause blockages inside the pump under liquid can be filtered.

Possibly, a connecting bracket 51 is arranged between the support tube 5 and the pump body 4, the support tube 5 and the pump body 4 are fixedly connected through the connecting bracket 51, wherein the connecting bracket 51 is respectively fixed with the support tube 5 and the pump body 4 through a stud bolt in a nut fit manner, and a sealing structure, such as a sealing washer, can be arranged at the joint.

Feasible, be provided with elbow 81 between drain pipe 8 lower extreme and the pump body 4, drain pipe 8 passes through elbow 81 with the pump body 4 intercommunication, and the both ends of elbow 81 respectively with between drain pipe 8 and the pump body 4 through stud cooperation nut fixed, the junction can be provided with seal structure, for example set up seal ring etc..

In addition, a bottom plate 71 is arranged below the bearing box 7, the upper part of the liquid outlet pipe 8 is fixedly connected with the bottom plate 71 through a clamp or other fixing structures, and the position can be fixed in a retainer ring mode, and the bottom plate 71 is fixedly connected with the support pipe 5 and the bearing box 7 through bolts.

Possibly, a first bearing 73 and a second bearing 74 which are sleeved on the pump shaft 6 are arranged in the bearing box 7, and the first bearing 73 and the second bearing 74 are movably arranged between the pump shaft 6 and the inside of the bearing box 7 respectively. The first bearing 73 is located inside, and may adopt the key bearing, and the second bearing 74 is located the junction of bearing box 7 below, may adopt the ball bearing, and feasible, the first bearing 73 and the junction of second bearing 74 and bearing box all are provided with the sealing washer and seal the setting.

In other embodiments of the present invention, the support tube 5 may be provided with multiple sections, for example, three sections, and the pump shaft 6 is provided with a shaft sleeve when the multiple sections are provided.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. A submerged pump comprises a driving motor (1), a motor base (2), a pump cover (3), a pump body (4), a supporting pipe (5), a pump shaft (6), a bearing box (7) and a liquid outlet pipe (8), wherein the driving motor (1) is fixed through the motor base (2), the lower end of the motor base (2) is fixedly connected with the bearing box (7), the pump shaft (6) is arranged between the driving motor (1) and the pump body (4), the pump cover (3) covers the pump body (4), an impeller (42) is arranged inside the pump body (4), the upper end and the lower end of the pump shaft (6) are respectively fixedly connected with a transmission structure inside the driving motor (1) and the impeller (42) inside the pump body (4), the supporting pipe (5) is sleeved outside the pump shaft (6), the upper end and the lower end of the supporting pipe (5) are respectively fixedly connected with the bearing box (7) and the pump body (4), the lower extreme and the pump body (4) intercommunication of drain pipe (8), its characterized in that: the lower extreme of pump shaft (6) is provided with double-deck double-screw bolt (9), impeller (42) pass through nut and double-deck double-screw bolt (9) fixed connection, double-deck double-screw bolt (9) are including first layer screw thread post (91) and second floor screw thread post (92), first layer screw thread post (91) and the range upon range of setting of second floor screw thread post (92), second floor screw thread post (92) set up the below at first layer screw thread post (91), second floor screw thread post (92) radius is less than first layer screw thread post (91), the screw thread opposite direction of first layer screw thread post (91) and second floor screw thread post (92).

2. A submerged pump as claimed in claim 1, wherein: the length ratio of the pump shaft liquid lower part to the pump shaft liquid upper part of the pump shaft (6) is 2: 1.

3. A submerged pump as claimed in claim 1, wherein: the lower extreme of the pump body (4) is provided with filter screen (41).

4. A submerged pump as claimed in claim 1, wherein: a connecting support (51) is arranged between the supporting tube (5) and the pump body (4), and the supporting tube (5) and the pump body (4) are fixedly connected through the connecting support (51).

5. A submerged pump as claimed in claim 1, wherein: be provided with elbow (81) between drain pipe (8) lower extreme and the pump body (4), drain pipe (8) pass through elbow (81) intercommunication with the pump body (4).

6. A submerged pump as claimed in claim 1, wherein: bearing box (7) below is provided with bottom plate (71), drain pipe (8) top and bottom plate (71) fixed connection, bottom plate (71) respectively with stay tube (5) and bearing box (7) fixed connection.

7. A submerged pump as claimed in claim 1, wherein: a first bearing (73) and a second bearing (74) which are sleeved on the pump shaft (6) are arranged in the bearing box (7), and the first bearing (73) and the second bearing (74) are movably arranged between the pump shaft (6) and the inside of the bearing box (7) respectively.

8. A submerged pump as claimed in claim 1, wherein: the supporting tube (5) is provided with three sections, and the pump shaft (6) is provided with a shaft sleeve.