JPH0213087Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a crushing pump for cutting and crushing solid matter mixed in liquid in a sewage treatment plant, etc., and transporting the solid matter without clogging.

Generally, in this type of crushing pump, a rotatable impeller is installed in the vicinity of the crushing grid, but conventionally, this crushing grid has crushing holes machined through a thick circular plate, and the crushing holes are machined through the crushing grid. The solid material is crushed between the blade and the edge of the impeller, but since this crushing grid was thick for strength reasons, it was heavy and it took time to form the crushing holes, making it difficult to manufacture the crushing grid. Costs were becoming high.

In this invention, the outer peripheral edge and the inner diameter edge of a thin plate-shaped crushing grid are bent in the same direction, and crushing holes are provided in the center surface of the grid, and a thin metal plate is press-formed. It can be manufactured by punching and cutting, which shortens processing time and can be manufactured at low cost, and also aims to reduce material costs and weight by reducing the thickness of the plate.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 to 5, the crushing pump 1 is constructed as follows. That is, a discharge casing part 5 is provided at the upper part of the main body 3, and a suction casing 7 is fixed to the main body 3 with bolts 9 in a direction perpendicular to the discharge casing part 5. The dirty water sucked into the suction casing part 5 passes through the suction passage 11, passes through the inside of the main body 3, passes through the discharge passage 13 of the discharge casing part 5, which is orthogonal to the suction passage 11, and is discharged to the outside. In the suction passage 11, a crushing grid 15 is provided between the suction casing 7 and the main body 3, and is detachably fixed thereto.
Crushing holes 17, 17, . . . are provided through the central surface portion 16 between the outer circumferential edge and the inner circumferential edge of 5. The crushing grid 15 is formed by press forming a steel plate, and has reinforcing ribs 19 on the outer peripheral edge and the inner diameter edge, respectively.
21 are bent in the same direction. Further, an impeller 23 for crushing solid matter is rotatably provided adjacent to the suction side of the crushing grid 15.
The impeller 23 is fixed to the rotating shaft 29 with a nut 27 via a key 25. The rotating shaft 29 is provided on the discharge side of the impeller 23 in the axial direction of the suction casing 7 . The rotating shaft 29 is supported by a bearing portion 33 that protrudes into the main body 3 via a bearing 31 . Further, an outer ring 35 is fitted into the main body 3 with an appropriate gap from the outer periphery of the impeller 23. Impeller 23
As shown in FIGS. 2 and 3, a blade portion 39 is provided on the leading edge (intake side) of a blade 37, and corresponds to a cutting blade 41 to crush solid materials. The cutting blade 41 protrudes obliquely into the suction casing 7 in a slidable manner in a direction corresponding to the blade portion 39, and its outer end is covered with a cap nut 43 and fixed in an appropriate position by a bolt 45. . Further, a blade portion 47 is provided on the trailing edge (discharge side) of the blade 37, and corresponds to the crushing grid 15 to crush the solid material. The rotating shaft 29 is connected to the main body 3
It is rotatably supported via a bearing 51 by a bearing sleeve 49 fixed at a position opposite to the suction casing 7, and a flange 53 connected to a drive shaft (not shown) is fixed to the outer end. There is. Bearing tube 4
A bearing case 55 is fitted into the inside of the bearing case 9 so as to be slidable in the axial direction, and a bearing 51 is fixed inside by a bearing holder 57. Bearing tube 49
is fixed to the main body 3 with bolts 59, 59. An adjustment handle 63 is screwed into a threaded portion 61 provided on the outer periphery of the bearing case 55, and by rotating the adjustment handle 63, the impeller 23 and the cutting blade 4 are adjusted.
1. To adjust the gap with the crushing grid 15. In addition, the bearing case 55 has a stud bolt 6
5. It is clamped and fixed in any position by bolts 67.

In the above embodiments, a drive device (not shown)
When actuated, the rotating shaft 2 is connected via the flange 53.
9 rotates, and as the impeller 23 rotates, liquid is sucked into the suction passage 11 of the suction casing 7, passes through the main body 3, and is discharged to the outside from the discharge passage 13. During this operation, solid matter mixed into the liquid, etc.
The solid material that is crushed between the cutting blade 41 and the blade portion 39 of the rotating impeller 23 and passed through the impeller 23 is further crushed into fine particles between the crushing grid 15 and the blade portion 47 of the impeller 23. , passes through the crushing holes 17, 17, and is discharged through the discharge passage 13.

Since the present invention has the configuration as described in the claims, it is possible to process the crushing grid by press forming and punching a thin metal plate, thereby reducing the thickness of the material of the crushing grid. This reduces the machining time for the crushing holes, makes it possible to manufacture the material at low cost, and reduces the weight.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented in other embodiments as well. Further, the symbols described in the claims do not limit the technical scope of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of one embodiment of the present invention, Fig. 2 is a front explanatory view of the main parts, Fig. 3 is a perspective view of the main parts, and Fig. 4 is a front explanatory view of other main parts. , FIG. 5 is a side sectional view of the same essential part. Explanation of symbols representing main parts of the drawings, 15...
...Crushing grid, 16...Central surface section, 23...Impeller.

Claims (1)

[Scope of utility model registration request] An impeller 23 rotatable near the crushing grid 15
In the crushing pump provided with this, the outer peripheral edge and the inner diameter edge of the thin plate-like crushing grid 15 are bent in the same direction, and the crushing holes 17 are provided in the central surface part 16 to penetrate. Features of the crushing pump.