JPH08135589A - Crushing pump - Google Patents

Abstract

PURPOSE: To perform regulation of a gap between a crushing impeller and a lattice-form fixed blade simply and high-precisely from the front side of a casing body. CONSTITUTION: A crushing pump 21 comprises a crushing impeller 27 rotated integrally with an impeller 26 on the suction passage 25 side of a casing body 22; and a lattice-form fixed blade 30 fixed on the suction passage 25 side at the back of the crushing impeller 27. An intermediate case 28. An intermediate case 28 is provided to support the lattice-form fixed blade 30 on the suction passage 25 side of the casing body 22 of the crushing pump and at the back of the crushing impeller 27. A regulating means 33 to cause access and separation of the lattice-form fixed blade 30 to and from the crushing impeller 27 is arranged on the outer periphery of the intermediate case 28 and the intermediate case 28 is fixed to the casing body 22 by means of a fastening bolt 29.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing pump for crushing, stirring and mixing solids, powders, etc. contained in a fluid.

[0002]

2. Description of the Related Art Generally, a crushing pump is used in various facilities such as wastewater treatment, general chemical industry, earthmoving industry, food industry, etc. that handle liquids containing solids or semi-solids, and clogging or flow in piping equipment. In order to eliminate troubles such as road blockage,
The solid material in the fluid is cut and crushed to a uniform size so as not to be clogged as a uniform solid-liquid mixture, and crushing and pressure feeding are performed simultaneously.

As a conventional crushing pump of this type, those shown in FIGS. 3 and 4 are known. This crushing pump comprises a pump body 1 provided on the upper part of a base, and a motor 5 connected to a rotary shaft 3 supported by a bearing mechanism 2 at the rear portion of the pump body 1 via a coupling 4. There is.

As shown in FIG. 4, the pump main body 1 includes an impeller 7 which is rotated by a rotary shaft 3 inside a casing main body 6, and an impeller 7 which is attached to the tip of the rotary shaft 3 and is located on the suction passage side of the casing main body 6. Between the crushing impeller 8 rotating integrally, the intermediate case 9 fixed by a bolt in the suction passage of the casing body 6, and the rear surface of the crushing impeller 8 on the inner peripheral surface side of the intermediate case 9. A lattice-shaped fixed blade 10 fixed with a gap, a shroud ring 11 similarly provided between the inner peripheral surface of the intermediate case 9 and the crushing impeller 8, and an upstream side of the suction passage of the casing body 6. Suction casing 1 provided in the vehicle and fixed to the intermediate case with bolts
2 and a cutting blade 13 which penetrates the upper portion of the suction casing 12 and has a tip arranged at the front surface of the crushing impeller 8 with a slight gap therebetween.

This crushing pump drives a drive motor 5, and the rotational force of this drive motor 5 is transmitted to a rotary shaft 3 supported by a bearing mechanism 2 of a pump body 1 via a coupling 4 and the rotary shaft 3 By rotating the impeller 7 and the crushing impeller 8, solid materials in the fluid are crushed by the crushing impeller 8 and the like, and the impeller 7 is pressure-fed.

In this crushing pump, the gap between the crushing impeller 8 and the grid-shaped fixed blade 10 is adjusted according to the size and material of the crushed material mixed in the fluid, the crushing conditions, and the like. ing. To perform this clearance adjustment, refer to FIG.
By rotating the adjusting handle 14 provided on the rear part of the bearing mechanism 2 of the tool using a tool, the intermediate case 15 screwed into the inside of the adjusting handle 14 is moved in the axial direction by the screw action. The rotating shaft 3 supported by the intermediate case 15 is thrust-moved, and the crushing impeller 8 fixed to the tip end side of the rotating shaft 3 is brought into contact with and separated from the grid-shaped fixed blade 10, thereby crushing the impeller 8 and the grid. Fixed blade 10
I am trying to adjust the gap between.

[0007]

However, in the conventional crushing pump described above, the crushing impeller 8 is moved by thrusting the rotary shaft 3 in order to adjust the clearance according to the crushing conditions.
Is connected to and separated from the lattice-shaped fixed blade 10, the gap cannot be adjusted after the rotary shaft 3 of the pump body 1 is connected to the rotary shaft 3 of the drive motor 5 by the coupling 4. Also, it has a large processing capacity for pumps in the wastewater treatment and general chemical industries, etc., and is suitable for applications with limited applications and infrequent maintenance, but it has a large processing capacity for the objects to be treated, such as in the food industry. However, it is unsuitable for those that must process many kinds of objects, and the total length of the rotary shaft 3 depends on the size of the gap between the crushing impeller 8 and the grid-shaped fixed blade 10. Since the length is comparatively long, when the object to be processed is a high temperature fluid, the thermal expansion of the rotary shaft 3 after the clearance adjustment affects the adjusted clearance and it is difficult to maintain an appropriate clearance. , Frequent crush pump activation The performs stop and clearance adjustment making it impossible corresponding point.

Further, in order to prevent the crushing impeller 8 from moving in the axial direction, a bearing having a large thrust strength is required.

The present invention has been made to solve the above problems, and even if a drive pump is connected to the rotary shaft, the crushing impeller and the grid-like fixing can be easily and accurately performed from the front side of the casing body. It is an object of the present invention to provide a crushing pump capable of adjusting the clearance between the blade and the blade.

[0010]

In order to solve the above problems, the present invention provides a casing body and a crushing impeller that rotates integrally with an impeller on the suction passage side of the casing body.
A crushing pump having a lattice-shaped fixed blade fixed to the suction passage side on the back surface of the crushing impeller, wherein the lattice-shaped fixed blade is supported on the suction passage side of the casing body on the back surface of the crushing impeller. An intermediate case is provided, and an adjusting means for separating and contacting the lattice-shaped fixed blade with respect to the crushing impeller is provided on the outer periphery of the intermediate case, and the intermediate case is fixed to the casing body with a tightening bolt. I am trying.

According to a second aspect of the present invention, the adjusting means comprises an annular adjusting handle having an inner screw threaded to an outer thread formed on the outer circumference of the intermediate case.

[0012]

According to the present invention, the grid-shaped fixed blade is fixed to the rotary shaft by supporting the grid-shaped fixed blade by the intermediate case provided on the suction passage side of the casing body and thrust-moving the intermediate case by the adjusting means. Adjustment is performed by bringing the crushing impeller into contact with and separating from the crushed impeller and fastening the intermediate case to the casing body with a fastening bolt.

According to the second aspect of the present invention, the adjusting means is formed of an annular body having an internal thread formed therein, and the annular case is rotatably engaged with the external thread of the intermediate case to move the intermediate case in the thrust direction. Let For example, if the adjusting means is turned to the right, the intermediate case moves to the suction passage side by the screw action. Then, tighten the intermediate case to the casing body with the tightening bolts to move the screw backlash to the casing body side.

When the present invention is applied to the mixing of powder and liquid in the food industry, for example, it is more crushed as compared with the case of simply stirring and mixing by hand or mixing and stirring with a conventional stirrer. The material to be processed is cut and mixed in the minute gaps between the impeller and the grid-shaped fixed blades, and mixing is performed at the particle level, improving the quality and taste of foods, and also for producing a wide variety of products in small quantities. Optimal.

[0015]

Next, the present invention will be described in detail with reference to the drawings. 1 and 2 show a crushing pump according to an embodiment of the present invention. In the figure, the same parts as those shown in the conventional figure are designated by the same reference numerals and the description thereof will be omitted.

The crushing pump 21 penetrates the center of the casing body 22 having the discharge nozzle 22a formed therein, and rotates the rotary shaft 2
3 is provided, and the central portion of the rotary shaft 23 is supported by a bearing portion 24 that is attached to the center of the casing body 22 and also serves as a mechanical seal. An impeller 26, which rotates inside the casing main body 22 and pressure-feeds the fluid from the discharge nozzle 22a, is attached via a key to the tip end side of the rotating shaft 23, that is, the suction passage 25 side in the present embodiment, and further to the tip end side thereof. The impeller 26 in the suction passage 25 of the casing body 22.
A crushing impeller 27 that rotates integrally with the above is attached via the key. The end of the crushing impeller 27 on the suction path side is fixed by a fixing nut 23b screwed onto the tip of the rotary shaft 23.

On the suction passage 25 side of the casing body 22,
The intermediate case 28 is fixed by tightening bolts 29. In this embodiment, six tightening bolts 29 are provided at equal intervals along the circumferential direction of the intermediate case 28. Intermediate case 28 is O
It is attached to the suction passage side inner peripheral surface of the casing body 22 via a ring. A grid-shaped fixed blade 30 is fitted on the inner peripheral side of the intermediate case 28.
And a rear surface of the crushing impeller 27, a slight gap is formed for cutting and crushing by sandwiching solid matter in the fluid.
The solid matter caught in the gaps between the grid-shaped fixed blades 30 is cut between the rotating crushing impeller 27 and the back surface thereof.

The lattice-shaped fixed blade 30 of this embodiment constitutes a shroud ring 30a by forming the shroud ring 30a so that its outer peripheral portion projects forward so as to cover the outer peripheral end of the crushing impeller 27, and this shroud ring 30a. Inside and the crushing impeller 2
The solid material in the fluid sandwiched between the outer blade formed on the outer periphery of the outer peripheral portion 7 and the outer peripheral portion is cut and crushed. Intermediate case 28
A suction casing 31 that forms a suction passage 25 between the suction casing 31 and the casing body 22 is fixed to the front surface of the with a bolt 32. In this embodiment, four bolts 32 are arranged at equal intervals in the circumferential direction. On the flange surface of the suction casing 31 on the intermediate case 28 side, the peripheral end portion of the shroud ring 30a is formed so as to be fitted via a seal portion.

Further, on the outer peripheral side of the intermediate case 28, there is provided an adjusting handle 33 as an adjusting means for axially positioning the intermediate case 28 with respect to the casing body 22. The adjustment handle 33 is formed in an annular shape and has an inner thread formed on an inner peripheral surface thereof to be screwed with an outer thread formed on an outer peripheral surface of the intermediate case 28. A plurality of fitting recesses 33a for rotating are formed along the circumferential direction. Then, by rotating the adjusting handle 33 with a tool, the intermediate case 28 is brought into contact with and separated from the front flange surface 22b of the casing body 22, whereby the grid-shaped fixed blades 30 fixed to the intermediate case 28 and the rotary shaft 23 are fixed. The gap between the crushing impeller 27 and the attached crushing impeller 27 is adjusted.

For example, with the tightening bolt 29 loosened,
When the adjustment handle 33 is turned to the right, the direction in which the intermediate case 28 is separated from the casing body 22 by a predetermined pitch by a screw action from the contact surface of the adjustment handle 33 with the casing body 22 as a starting point, that is, the suction passage 25 side Move to. At this time, the grid-shaped fixed blades 30 fixed to the intermediate case 28 move to the back side of the crushing impeller 27 and come into contact with the crushing impeller 27, so that the adjustment handle 33 does not rotate. From this state, by tightening the intermediate case 28 to the casing body 22 side with the tightening bolts 29, the outer screw surface of the intermediate case 28, which was in contact with one surface of the inner screw of the adjustment handle 33, is adjusted to the inside of the adjustment handle 33. By being pushed back to the other surface side of the screw, the backlash is returned.

Therefore, by utilizing this action,
It is possible to adjust the clearance of the screw processing tolerance. In the crushing pump of the present embodiment, it is preferable that the gap between the crushing impeller 27 and the grid-shaped fixed blade 30 is adjusted to be about 0.05 mm to 5 mm. Further, by using different materials for the intermediate case 28 and the adjustment handle 33, it is possible to prevent galling of the screw portion.

On the other hand, a flange 22c is formed on the rear surface side of the casing body 22, and a drive motor 35 is directly fixed to the flange 22c with a bolt 36.
Further, in this embodiment, the impeller 26 and the crushing impeller 27 are used.
The rotary shaft 23 for rotating the drive motor 35 is formed integrally with the rotary shaft of the drive motor 35, and the other end side of the rotary shaft 23 projects outward from the rear part of the drive motor 35. Handle 3 for hand rotation during assembly
7 is attached. The rotating shaft 23 may be configured such that the casing body 22 side and the drive motor 35 side are separate bodies, and these are integrated by a coupling.

As described above, the crushing pump 2 of this embodiment
According to 1, by rotating the adjustment handle 33 provided on the front surface of the casing main body 22 in the gap between the crushing impeller 28 and the grid-shaped fixed blade 30, the grid-shaped fixed blade 30 is changed to the crushing impeller 28. Since the adjustment is performed by contacting and separating from the casing main body 22, the gap can be easily adjusted from the front surface of the casing main body 22 even when the drive pump 35 is connected to the casing main body 22. Therefore, the processing capacity of the object to be processed is not so large, and it is suitable for use in equipment where a large number of kinds of objects to be processed must be processed.

The temperature conditions of the crushing impeller, the grid-shaped fixed blades, and the adjusting handle are almost constant, and there is no change in the clearance after adjustment depending on the temperature condition of the object to be treated, and the optimum adjusted condition is obtained. The cutting and mixing process of the object to be processed can be performed in the gap. Further, the clearance dimension to be adjusted can be finely adjusted for the screw backlash.

Therefore, in the crushing pump of this embodiment, the pump can be downsized to handle a wide variety of products with a small volume and to be handled and maintained easily.

[0026]

According to the crushing pump of the present invention, an intermediate case is provided on the suction passage side of the casing body for supporting the grid-shaped fixed blade on the back surface of the crushing impeller, and the grid-shaped fixed blade is crushed on the outer periphery of the intermediate case. Since the intermediate case is fixed to the casing main body with the tightening bolts together with the adjusting means for separating and contacting the impeller, the crushing impeller and the grid-shaped fixed blade are easily and accurately arranged from the front side of the casing main body. The gap can be adjusted.

According to the second aspect of the present invention, since the adjusting means is constituted by the annular adjusting handle having the inner screw threaded to the outer thread formed on the outer circumference of the intermediate case, the adjusting handle is rotated. By doing so, it is possible to adjust the gap between the crushing impeller and the lattice-shaped fixed blade, and to finely adjust the gap size of the screw backlash.

[Brief description of drawings]

FIG. 1 is a side view in which a main part of a crushing pump of the present invention is sectioned.

FIG. 2 is a front view of FIG.

FIG. 3 is a side view of a conventional crushing pump.

FIG. 4 is a sectional side view of a conventional crushing pump.

[Explanation of symbols]

 21 Crush Pump 22 Casing Main Body 23 Rotating Shaft 25 Suction Path 26 Impeller 27 Crush Impeller 28 Intermediate Case 29 Tightening Bolt 30 Lattice Fixed Blade 33 Adjusting Means

Claims (2)

[Claims] 1. A casing body, and a crushing impeller that rotates integrally with an impeller on the suction passage side of the casing body.
A crushing pump having a lattice-shaped fixed blade fixed to the suction passage side on the back surface of the crushing impeller, wherein the lattice-shaped fixed blade is supported on the suction passage side of the casing body on the back surface of the crushing impeller. An intermediate case is provided, and an adjusting means for separating and contacting the lattice-shaped fixed blade with respect to the crushing impeller is provided on the outer periphery of the intermediate case, and the intermediate case is fixed to the casing body with a tightening bolt. And a crushing pump. 2. The crushing pump according to claim 1, wherein the adjusting means comprises an annular adjusting handle having an inner screw threaded to an outer screw formed on the outer circumference of the intermediate case.