JPS6235909Y2 - - 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 sewage treatment plants, etc., and transporting the solid matter without clogging.

Generally, in this type of crushing pump, a rotatable impeller is provided in the flow path, a crushing lattice plate is provided adjacent to one side of the impeller, and a plurality of radial shapes penetrating both sides of the crushing lattice plate are provided. The solid material is crushed between the respective edges of the corresponding impeller and the grid holes of the crushing grid plate, and the crushed solid material is sent through the grid holes. Conventionally, this solid material was compressed and forced into the grid holes at the moment of crushing, so it could return due to elasticity and clog the inner walls of the grid holes at the moment the crushing was completed.

In the present invention, the circumferential width of the lattice holes of the crushing lattice plate is gradually increased from the side facing the impeller at the inlet to the side opposite to the outlet. The circumferential width of the lattice holes increases in the direction in which the material passes through the lattice holes, so even if the solid material after crushing returns due to elasticity, the compressive force between it and the side wall is reduced. The purpose is to make it easier for solids to separate and eliminate clogging.

In addition, the "width dimension of the lattice hole in the circumferential direction" as used in the present invention refers to the width dimension of the lattice hole in the circumferential direction of a circle centered on the center of the crushing lattice plate, that is, the center of the rotation axis. , the direction of relative movement between the crushing grid plate and the impeller, and the direction in which the solid material is sheared and crushed.

In addition, "increasing size gradually from the side surface on the impeller side to the side surface on the opposite side" means that the crushed solids gradually increase in size from the side surface on the impeller side, where the crushed edge of the crushed lattice plate is located, to the side surface on the opposite side. This refers to a gradual change in the width of the lattice hole in the direction in which it passes through the hole, and includes shapes that suddenly become larger in stages and shapes that gradually become larger with an incline. Therefore, this also includes the fact that there is no part where the width becomes smaller on the way from the entrance to the exit of the lattice hole.

In addition, in the case of a crushed lattice plate that is divided into a front plate and a rear plate as shown in Figs. 10 and 11, "the side surface on the impeller side" refers to the side surface of the front plate on the impeller side. It is.

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

In Figures 1 to 5, 1 is a crushing pump;
It is structured as follows. That is, 3 is a main body, a suction casing 5 is fixed to the side part by bolts 7, and a discharge casing part 9 is provided upward perpendicular to the suction casing 5. The sewage sucked into the suction casing 5 passes through the suction passage 11, passes through the main body 3, and is discharged to the outside from the discharge passage 13. In the suction passage 11, a crushing grid plate 15 is sandwiched between the suction casing 5 and the main body 3, and is detachably fixed to the crushing grid plate 15. An impeller 17 for crushing solid materials and the like is rotatably provided. The impeller 17 has a bolt 2 in the hole 19 in the center.
1. It is fixed to the rotating shaft 25 via the key 23. The rotating shaft 25 is provided on the discharge side of the impeller 17 in the axial direction of the suction casing 5 . Rotating shaft 25
is a bearing body 2 fixed to the main body 3 via a bearing 27
It is pivoted by 9. In addition, the suction casing 5
An outer ring 31 is fitted to the outer circumference of the impeller 17 with an appropriate gap therebetween. The blade portion 35 of the impeller 17 is provided at the front edge of the blade 33, and corresponds to a cutting blade 37 provided close to the suction side of the impeller 17 to crush large solids. The cutting blade 37 projects obliquely into the suction casing 5 in a slidable manner in a direction corresponding to the blade portion 35, and its outer end is covered by a cap nut 39 and fixed in an appropriate position by a bolt 41. Furthermore, a blade portion 43 for crushing solid matter is provided at the rear edge portion of the blade 33 in correspondence with the crushing grid plate 15 . The rotating shaft 25 is attached to the main body 3 and the suction casing 5
The bearing 4 is fixed to the bearing tube 45 on the opposite side.
7, and a flange 49 connected to a drive shaft (not shown) is fixed to the outer end. Inside the bearing tube 45 is a bearing case 5.
1 is fitted to be slidable in the axial direction, and a bearing 47 is fixed inside by a bearing holder 53. The bearing cylinder 45 is attached to the main body 3 by bolts 55, 55.
is fixed to. An adjustment handle 59 is screwed into a threaded portion 57 provided on the outer periphery of the bearing case 51, and by rotating the adjustment handle 59, the gap between the impeller 17, the cutting blade 37, and the crushing lattice plate 15 is adjusted. be. Also bearing case 51
is clamped and fixed in any position by stud bolts 61 and bolts 63. The crushing lattice plate 15 is provided with a plurality of radial lattice holes 65 passing through both side surfaces, and the width dimension of the lattice holes 65 in the circumferential direction is sequentially adjusted from the side surface on the impeller 17 side to the opposite side surface. Largely formed.

That is, in this embodiment, the width of the lattice hole 65 in the circumferential direction is such that it connects and communicates from the smaller-width hole to the larger-width hole from the side surface on the side of the impeller 17 at the inlet to the side surface on the opposite side to the outlet. It is formed as follows.

In the above embodiments, a drive device (not shown)
When actuated, the rotating shaft 25 is rotated through the flange 49.
The rotation of the impeller 17 causes the liquid to be sucked into the suction passage 11 of the suction casing 5, and the liquid is sucked into the suction passage 11 of the suction casing 5.
It passes through the inside and is discharged to the outside from the discharge passage 13.
The solids mixed into the liquid are removed by the cutting blade 37 and the impeller 1.
The solids crushed between the blade portion 35 of the blade 7 and passed through the impeller 17 are further finely crushed between the blade portion 43 and the edges of the lattice holes 65 of the crushing lattice plate 15, and then passed through the lattice holes 65. It passes through and is discharged from the discharge passage 13. When the solid material is crushed between the blade portion 43 and the edge of the grid hole 65, it is compressed and deformed, and the solid material is crushed into the grid hole 6.
The deformation returns within the lattice hole 65 and it is pressed against the inner wall, but since the width of the inner wall of the lattice hole 65 is set larger than the width of the entrance, it will not become clogged, or even if it is clogged, the pressing force will be reduced. It is small and easily detached by the flow of liquid.

Since the present invention has the configuration as described in the claims, the crushed solids do not clog the grid holes and can be smoothly pumped.

In addition, Figures 6 to 11 show the cross-sectional shapes of various lattice holes of the present invention. Figure 6 shows the width dimension on the exit side increased only on one side, and Figure 7 shows the width dimension from the entrance to the exit. Fig. 8 shows a model in which it is inclined from the middle, Fig. 9 shows a model in which only one side is inclined, and Fig. 10 shows a model in which the crushing grid plate 15 is connected to a front plate 67 and a rear plate 69 for crushing. The lattice holes 65 of the front plate 67 are formed in sections, and the width of the lattice holes 65 of the front plate 67 is smaller than the width of the rear plate 69. In FIG. 11, the lattice holes 65 of the rear plate 69 are similarly provided at an angle.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of one embodiment of the present invention, Fig. 2 is a front view of the main parts, Fig. 3 is a perspective explanatory view of the main parts, Fig. 4 is a front view of other main parts, and Fig. 5 is a front view of the main parts. The figures are enlarged sectional views of main parts, Figures 6, 7, 8, 9, and 10.
11 are enlarged sectional views of the second, third, fourth, fifth, sixth, and seventh embodiments, respectively. Explanation of symbols representing main parts of the drawings, 15...
...Crushed lattice plate, 17... Impeller, 65... Grid hole.

Claims (1)

[Scope of utility model registration request] A crushing lattice plate 15 is provided adjacent to one side of an impeller 17 rotatably provided in the flow path, a plurality of radial lattice holes 65 are provided in the crushing lattice plate 15 passing through both sides, and the lattice holes 65 The width dimension in the circumferential direction of the impeller 17 is gradually increased from the side surface on the side facing the impeller 17 to the side surface on the opposite side.
fracturing pump.