CN222746308U - A BB1 pump cover - Google Patents

Abstract

The utility model belongs to the technical field of centrifugal pumps, and discloses a BB1 pump cover, comprising a cover body provided with a stuffing cavity, wherein the cover body is provided with an impeller cavity and a rotating shaft cavity, wherein the impeller cavity is used to accommodate an impeller, and the rotating shaft cavity is used to accommodate a rotating shaft, and the stuffing cavity is communicated with the rotating shaft cavity; a plurality of ribs are provided on the cover body, and straight holes are opened in the ribs, one end of the straight hole is communicated with the impeller cavity, and the other end of the straight hole is communicated with the stuffing cavity; the utility model solves the problems that the cooling device of the sealing stuffing of the existing pump cover is easy to be damaged and the potential risk of liquid leakage is high.

Description

BB1 pump cover

Technical Field

The utility model relates to the technical field of centrifugal pumps, in particular to a BB1 pump cover.

Background

BB1 pumps are axially split stage 1 and stage 2 two-port centrifugal pumps, where the pumped fluid is commonly referred to as the medium, most commonly water. The centrifugal pump is a mechanical device for pumping water by utilizing centrifugal motion of water, and its main components include pump shell, pump cover, impeller, pump shaft and pump frame. The centrifugal pump works in the principle that the impeller rotating at high speed drives water to perform centrifugal motion, so that the water is pumped from a low place to a high place. Before the centrifugal pump is started, water needs to be filled into the pump, after the centrifugal pump is started, the rotating impeller can drive the water in the pump to rotate at a high speed to generate centrifugal motion, the water is thrown out and pressed into the water outlet pipe under the action of the centrifugal force, after the water is thrown out, the pressure near the impeller can be reduced, a low-pressure area is formed near the rotating shaft, the pressure of the low-pressure area is far lower than the atmospheric pressure, therefore, external water enters the pump through the bottom valve under the action of the atmospheric pressure, and the water entering the pump is thrown out again in the process of rotating at a high speed along with the impeller and is pressed into the water outlet pipe.

The BB1 pump has the advantages that the shell and the cover body of the BB1 pump are in sealing connection with the rotating shaft, so that liquid outflow is avoided, when the existing sealing is realized by adopting a packing seal, the packing must be tightly pressed for increasing the sealing effect, but if the packing is tightly pressed, dry grinding and high-temperature burning out are easy to occur, so that high-pressure parts on two sides of the pump are needed to be respectively connected with pipes, the liquid in the pump is connected with the middle of the packing, the packing is lubricated and cooled while the sealing performance is ensured, the external pipes are directly exposed, the external pipes are knocked and damaged in the transportation and use processes, the wall thickness of the external pipes is thinner, the service life is short, and each external pipe has two interfaces, so that hidden danger of leakage is indicated.

Disclosure of utility model

The utility model aims to provide a BB1 pump cover so as to solve the problems that the cooling device of the sealing filler of the existing pump cover is easy to damage and the hidden danger of liquid leakage is high.

In order to achieve the above object, the present utility model provides the following technical solutions:

the basic technical scheme provided by the utility model is as follows:

The BB1 pump cover comprises a cover body provided with a filling cavity, an impeller cavity and a rotating shaft cavity are arranged in the cover body, the impeller cavity is used for accommodating an impeller, the rotating shaft cavity is used for accommodating a rotating shaft, the filling cavity is communicated with the rotating shaft cavity, a plurality of rib plates are arranged on the cover body, straight holes are formed in the rib plates, one ends of the straight holes are communicated with the impeller cavity, and the other ends of the straight holes are communicated with the filling cavity.

Further, the straight hole comprises an upper straight hole and a lower straight hole which are communicated with each other, one end of the upper straight hole is communicated with the impeller cavity, the other end of the upper straight hole penetrates through the side wall of the rib plate, a blocking piece is arranged at one end, away from the impeller cavity, of the upper straight hole, and one end, away from the upper straight hole, of the lower straight hole is communicated with the packing cavity.

Further, the blocking piece is a plug, one end of the upper straight hole, which is far away from the impeller cavity, is provided with an internal thread, the plug is connected with the upper straight hole through a pipe thread, and a sealing medium is arranged at the pipe thread connection position.

Further, the blocking piece is a plug, and the plug is connected with the upper straight hole through welding.

Further, the number of the rib plates is two, the two rib plates are symmetrically arranged, and the length direction of the rib plates is parallel to the axis direction of the rotating shaft cavity.

The basic technical scheme has the principle and beneficial effects that:

(1) The rotating shaft cavity of the cover body is used for installing the rotating shaft; the packing cavity of the cover body is used for accommodating packing, so that the cover body is connected with the rotating shaft through packing in a sealing way, and liquid leakage is avoided; the pump cover eliminates external fragile pipe connection type cooling and changes the external fragile pipe connection type cooling into a difficult-to-damage rib plate internal drilling mode, and the added rib plate can increase the strength of the pump cover, promote the bearing capacity, namely promote the service life of the pump cover, cancel two leakage points of the original pipe connection type and reduce the leakage hidden trouble;

(2) The straight holes adopt an upper straight hole and a lower straight hole, two times of drilling are adopted during processing, through holes are drilled from the side wall of the rib plate to the impeller cavity, and then the upper straight hole is drilled upwards from the filling chamber, so that the processing is convenient, the efficiency is increased, and the cost is saved; if the plug is connected with the upper straight hole through a pipe thread, a sealing medium is arranged at the joint of the pipe thread, the sealing effect is improved, the cooling flow can be regulated through screwing depth, the cooling flow is required to be reduced, the plug is screwed deeper, the communication area of the upper straight hole and the lower straight hole is reduced, the overflow area is reduced, and the cooling flow is required to be increased;

(3) The two rib plates are symmetrically arranged, and the length direction of the rib plates is parallel to the axis direction of the rotating shaft cavity, so that the strength of the pump cover is further improved, the bearing capacity is improved, and the service life is prolonged.

Drawings

FIG. 1 is a schematic diagram of a BB1 pump cap according to the present utility model;

FIG. 2 is a front view of a BB1 pump cap of the present utility model;

FIG. 3 is a view in the A-A direction of FIG. 2;

FIG. 4 is a schematic diagram of the assembly of a BB1 pump cap and a pump body;

FIG. 5 is a partial schematic view of FIG. 4;

The names of the corresponding marks in the drawings are:

pump frame 1, pump shell 2, lid body 3, rib plate 31, upper straight hole 32, plug 33, lower straight hole 34, packing cavity 35, packing 4, packing ring 5, pivot 6, impeller 7, impeller cavity 8.

Detailed Description

The utility model is described in further detail below with reference to the attached drawings and embodiments:

As shown in fig. 1 to 5, a BB1 pump cover comprises a cover body 3 provided with a packing cavity 35, wherein an impeller cavity 8 and a rotating shaft cavity are arranged in the cover body 3, the impeller cavity 8 is used for accommodating an impeller 7, the rotating shaft cavity is used for accommodating a rotating shaft 6, the packing cavity 35 is communicated with the rotating shaft cavity, two ribs 31 which are symmetrically arranged are arranged on the cover body 3, the length direction of each rib 31 is parallel to the axial direction of the corresponding rotating shaft cavity, the two ribs 31 are distributed along the axial direction of the corresponding rotating shaft cavity, a straight hole is formed in each rib 31, one end of each straight hole is communicated with the impeller cavity 8, the other end of each straight hole is communicated with the corresponding packing cavity 35, in this embodiment, the straight hole comprises an upper straight hole 32 and a lower straight hole 34 which are mutually communicated, one end of each straight hole 32 is communicated with the impeller cavity 8, the other end of each straight hole 32 penetrates through the side wall of each rib 31, the upper straight hole 32 forms an opening on the side wall of each rib 31, one end of each lower straight hole 34 far away from the corresponding straight hole 32 is communicated with the corresponding packing cavity 35, a blocking piece is arranged at one end of each upper hole 32 far away from the impeller cavity 8, one end of each straight hole 33 is also connected with each straight hole 33 through a thread plug pipe through a thread seal, and the thread plug pipe is connected with the straight hole 33 in a thread seal pipe through the thread plug hole 33.

The specific implementation process is as follows:

The pump frame 1, the pump shell 2, the rotating shaft 6, the impeller 7 and the pump cover are assembled, a packing cavity 35 between the pump cover and the rotating shaft 6 is filled with packing 4, a packing ring 5 is installed, the position of a plug 33 is adjusted according to the required liquid flow, a power supply is turned on, liquid in the impeller cavity 8 flows into the packing cavity 35 through an upper straight hole 32 and a lower straight hole 34, and the liquid is uniformly distributed in the circumferential direction through the packing ring 5, so that the packing 4 is lubricated and cooled while the sealing performance is ensured.

The pump cover is characterized in that a rotating shaft cavity of a cover body 3 is used for installing a rotating shaft 6, a packing cavity 35 of the cover body 3 is used for accommodating packing 4, the cover body 3 and the rotating shaft 6 are connected in a sealing mode through the packing 4 to avoid liquid leakage, a rib plate 31 is arranged on the cover body 3, a straight hole is arranged in the rib plate 31, an impeller cavity 8 is used for accommodating an impeller 7, one end of the straight hole is communicated with the impeller cavity 8, the other end of the straight hole is communicated with the packing cavity 35, the impeller 7 rotates at a high speed, liquid in the impeller cavity 8 flows into the packing cavity 35 through the straight hole, packing rings 5 are arranged in the packing cavity 35, the packing rings 5 uniformly distribute the liquid in the circumferential direction, so that cooling packing 4 can be lubricated, the pump cover cancels external fragile pipe connection type cooling, and is changed into a difficult-damaged rib plate internal drilling mode, and the added rib plate can increase the strength of the pump cover, the bearing capacity is improved, namely the service life of the pump cover is prolonged, two hidden danger of leakage of an original pipe connection type are eliminated.

The foregoing is merely exemplary embodiments of the present utility model, and detailed technical solutions or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present utility model, and these should also be regarded as the protection scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the practical applicability of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (5)

1. A BB1 pump cover is characterized by comprising a cover body (3) provided with a filling cavity (35), wherein an impeller cavity (8) and a rotating shaft cavity are arranged in the cover body (3), the impeller cavity (8) is used for accommodating an impeller (7), the rotating shaft cavity is used for accommodating a rotating shaft (6), the filling cavity (35) is communicated with the rotating shaft cavity, a plurality of rib plates (31) are arranged on the cover body (3), straight holes are formed in the rib plates (31), one end of each straight hole is communicated with the impeller cavity (8), and the other end of each straight hole is communicated with the filling cavity (35).

2. The BB1 pump cover of claim 1, wherein said straight hole comprises an upper straight hole (32) and a lower straight hole (34) which are communicated with each other, one end of said upper straight hole (32) is communicated with said impeller cavity (8), the other end of said upper straight hole (32) penetrates through the side wall of said rib plate (31), a blocking member is arranged at one end of said upper straight hole (32) away from said impeller cavity (8), and one end of said lower straight hole (34) away from said upper straight hole (32) is communicated with said filler cavity (35).

3. The BB1 pump cover of claim 2, wherein said blocking member is a plug (33), an inner thread is provided at an end of said upper straight hole (32) away from said impeller cavity (8), said plug (33) is connected to said upper straight hole (32) by a pipe thread, and a sealing medium is provided at the pipe thread connection.

4. The BB1 pump cap of claim 2, wherein said blocking member is a plug (33), and said plug is welded to said upper straight hole (32).

5. The BB1 pump cap of claim 1, wherein said number of ribs (31) is two, and said ribs (31) are symmetrically disposed, and the longitudinal direction of said ribs (31) is parallel to the axial direction of said shaft cavity.