JPS592839Y2 - Hammer crusher for mineral samples - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hammer crusher for crushing mineral sample materials such as coal.

Coal unloaded at a coal storage yard is operated under optimal conditions that match the composition of the coal, so sampled coal is crushed into approximately 9 mm pieces using a hammer crusher and analyzed.

However, in the conventional hammer crusher, as shown in FIG. 3, the lower half circumferential wall 27 of the crushing chamber 3 has a rostrum shape in which a large number of gaps 26 are formed at equal intervals.

Further, a stepped contact surface 62 is formed on one side of the upper half circumference,
A sample input port 24 is opened on the other side.

A striking body 4 equipped with a hammer piece 5 is rotated in the crushing chamber 3, and the sample collides with the contact surface 62 to efficiently crush the sample. The resulting particles and powder of the sample stick to the inner wall of the crushing chamber 3, and further clog the gap 26 in the lower half circumferential wall 27 of the Rosdle shape.

If a bond with crushed particles stuck to the peripheral wall 27 is left unattended, the adhesive layer will peel off when the next sample is crushed, and the crushed particles in the adhesive layer will mix with the newly introduced sample, making it difficult to perform a correct analytical test. Can not.

For this reason, the peripheral wall of the crushing chamber must be cleaned every time the crushing operation is completed, which is extremely time-consuming.

Purpose of the present invention The purpose of the present invention is to prevent samples from sticking to the surrounding wall and to simplify cleaning work.

Structure of the present invention The inner wall 20 of the crushing chamber 3 is formed into a circular arc surface with no irregularities, which is on the same level as the center of rotation of the striking body 4 and approaches the tip of each hammer piece 5 with a distance of 15 mm or less. There is.

The inner wall 20 has only one sample input port 24 at the top and one downward sample discharge port 25 at the bottom.
There are no openings except for 4 and outlet 25.

Functions and Effects of the Present Invention Since the inner wall 20 of the crushing chamber 3 is formed into an arcuate surface with no irregularities, the crushed sample hardly sticks to the inner wall due to vibrations when the crusher is operating. Even in the event of sticking, the tip of the hammer is close to the inner wall with a distance of 15 mm or less, so the glue layer will be scraped off before it gets thicker. There is almost no need for cleaning as it peels off.

The present invention will be specifically described below based on embodiments shown in the drawings.

As is well known, the hammer crusher has a hollow housing frame 1.
A cylindrical casing 2 made of high manganese steel is placed inside with its axis horizontal, and a crushing chamber 3 is surrounded by the casing.
The striking body 4 is rotatably disposed at the center.

The frame 1 and the casing 2 are vertically separable on a plane including the axis of the casing 2, and the frame 1 has connection pieces 13.1 protruding from the upper and lower frame members 11.12.
4 and the connecting pin 15 is removably fitted into the assembly.

The upper and lower casing members 21.22 are fixed to the upper and lower frame members 11.12 by stays 23, respectively.

In the upper casing member 21, an input port 24 is opened extending from just above the center of rotation of the striking body 4 to one side over approximately the entire width of the casing, and a chute 6 is connected to the input port 24. Ru.

The chute 6 is formed to expand downward with a gently sloped abutment plate 62 facing a steeply sloped guide plate 61.

A discharge port 25 is provided approximately at the center of the lower casing 22 and extends over approximately the entire width of the casing, and a discharge guide tube 7 is connected to the discharge port 25 .

The rotating body 4 is rotatably mounted between a rotating shaft 41 that freely rotates through both side walls of the frame 1, a disc-shaped support plate 8 fitted into the rotating shaft 41, and supporting plates 8, 8. It is composed of a hammer piece 5.

The support plate 8 has short bosses 81.81 on both sides of the plate around a central shaft hole 80, and two virtual circles 84.85 concentric with the axis on the outer circumferential side of the plate at 90° intervals. 4 pin holes 82
．． 83 have been established.

The difference in radius between the inner virtual circle 85 and the outer virtual circle 84 is 10 to 1
It is 5mm.

The hammer piece 5 is made of high manganese steel like the casing 2, and has a pin hole 51 having the same diameter as the pin holes 82 and 83 of the support plate 8 at its base end.

Two types of hammer pieces 5, long and short, are prepared, and long hammer pieces 5
When the bottle hole 51 is aligned with the bottle hole 82 on the axis side of the support plate 8 and oriented in the radial direction, the gap 9 between the tip of the hammer piece 5 and the inner wall 20 of the casing 2 is 1 mm or less, and the short hammer In the piece 5a, a gap 91 formed between the tip end surface and the inner surface of the casing is 10 to 15 mm.

Two types of hammer pieces 5, 5a, long and short, are arranged on each support plate 8, 8 on the rotating shaft 41, and each hammer piece 5,
The rotary body 4 is constructed by aligning the bottle holes 51 of 5a with the inner bottle holes 82 on the support plate 8, and inserting the connecting shafts 42 in a series in a detachable manner.

When a sample is introduced from the chute 6 while rotating the rotary body 4, the sample falls into the crushing chamber 3 and is crushed by the blows of the rotating hammer pieces 5, 5a. It collides with the inner wall 20 of the casing 2 and rebounds, and is further struck by the hammer piece 5 to be broken into pieces and discharged from the discharge port 25.

The inner wall 20 of the crushing chamber 3 is formed into an arcuate surface with no irregularities, and the sample hardly sticks to the inner wall 20 due to vibrations during operation of the hammer crusher.

Even in the event of a stalemate, the tip of the hammer will be attached to the inner wall 20 of the crushing chamber 3.
Because they are close to each other with a narrow gap of 15 mm or less, the adhesive layer is scraped off before it becomes thick, and at that time, the vibration peels off the adhesive layer from the inside surface, which eliminates most of the time-consuming cleaning work. It has an excellent effect that you don't need it often.

It should be noted that the present invention is not limited to the above-mentioned configuration, and it goes without saying that various modifications can be made within the technical scope described in the claims of the utility model registration.

[Brief explanation of drawings]

Figure 1 is a partially cutaway front view, Figure 2 is Figure 1 II-
A sectional view taken along line II, and FIG. 3, is a sectional view of a conventional example. 3...Crushing chamber, 20...Inner wall, 5...
...Hammer piece.

Claims (1)

[Scope of utility model registration request] A rotary impacting body 4 having a plurality of hammer pieces 5 protruding from the crushing chamber 3
In the hammer crusher which crushes the material in the crushing chamber 3 by rotating the hammer crusher, the inner wall 20 of the crushing chamber 3 is in the same layer as the center of rotation of the striking body 4 and is 15 mm away from the tip of each hammer piece 5. The inner wall 20 has only one material input port 24 at the top and one downward material discharge port 25 at the bottom. A hammer crusher for crushing mineral samples, characterized in that there are no openings except for the outlet 25.