JPH0826459A - Scraper type belt cleaner device - Google Patents

Abstract

PURPOSE:To provide a device for keeping the press force of a scraping plate constant regardless of the wear of the scraping plate and a belt and further using no other utilities. CONSTITUTION:In a belt conveyer scraper type belt cleaner device for pressing a scraping plate 21 through an elastic body 18 against the surface of a belt B to remove deposits on the belt, an elastic rubber spring 18 having a fixed reaction region on a reaction characteristic curve relative to a compression amount is used for the elastic rubber body 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scraper type belt cleaner device for scraping transported materials and the like adhering to the surface of a belt conveyor.

[0002]

2. Description of the Related Art Generally, when a powdered raw material is transported by a belt conveyor, there is a difference in the amount depending on the nature of the raw material, but adhesion of the raw material to the belt surface is an unavoidable phenomenon. This adhered substance falls over the entire length of the belt, which causes environmental problems due to dust generation and an increase in cost due to recovery processing work.

To prevent this phenomenon, belt cleaners have been conventionally installed, but there are many types of belt cleaners.
There are merits and demerits in terms of performance, and we are still not in a satisfactory situation.

By the way, the existing methods of maintaining the pressure of the cleaner can be roughly classified into two types. One is a spring type shown in FIG. 2, which is a U type fixed to the rotary shaft 1.
The die scraper main body 2 is configured to maintain the pressing force on the belt by pulling the end of the arm 3 protruding from the rotary shaft 1 with a spring 4. The other is the cushion rubber type shown in FIG. 3, in which the cushion rubber 6 is attached to the shaft 5.
The support piece of the cleaner tip 7 is fixed via the shaft, and the shaft 5 is clamped while the cleaner tip is pressed against the belt B by a predetermined pressing force to maintain the pressing force. Further, in addition to these two types, there is one that employs an air tube system as the pressure maintaining mechanism shown in FIG. 4 (Japanese Patent Laid-Open No. 4-182212). This is to maintain the pressing force by pressing the member 8 having the cleaner tip 7 at the tip with the air tube 9. The pressurized fluid is supplied to the air tube 9 from the supply port 9a.

[0005]

In the conventional scraper type belt cleaner, since the cushion rubber and the spring as described above are used, it is initially set due to the wear of the tip and the belt due to its characteristics. The pressing force sharply decreases from the target setting pressing force, and the scraping efficiency of the transported material or the like adhering to the belt surface sharply deteriorates.

As a method for preventing such deterioration of the scraping efficiency, Manual adjustment of the cleaner body 2. It is possible to increase the maintenance of pressing force by the air tube, etc. However, 1 requires a lot of labor and time, and the work environment is bad, and 2 has the problem that equipment cost and operating cost are high. is there.

Further, in the conventional method, since the allowable compression displacement for obtaining the target pressing force is small, it takes time to install or adjust the cleaner, and it is possible to measure the pressing force. The problem is that it is extremely difficult.

This pressing force is closely related to the scraping efficiency, and it is necessary to grasp the pressing force for maintenance. Further, as a problem of the conventional cleaner, a low pressing force (initial setting) is also a problem. This pressing force and the scraping efficiency are in a proportional relationship, and increasing the pressing force results in increasing the scraping efficiency.However, if the pressing force is increased too much, the belt surface will be worn or damaged, The upper limit has been determined in terms of equipment protection. In the case of conventional cleaners, equipment protection is prioritized, and the pressing force often becomes insufficient, which causes deterioration of scraping efficiency.

The present invention has been made in order to solve the above-mentioned problems, and obtains a device in which the pressing force of the cleaner is kept constant regardless of the wear of the tip and the wear of the belt, and no other utility is used. Is intended.

[0010]

The scraper type belt cleaner device of the present invention is a scraper type belt cleaner device for a belt conveyor for removing a belt deposit by pressing a scraping plate against a belt surface through an elastic body.
An elastic rubber spring made of rubber or a rubber-like elastic material having a constant reaction force region in a reaction force characteristic curve with respect to the amount of compression is used as the elastic body.

A slide shaft holding one or a plurality of scraping plates at one end, a push plate mounted at a right angle to the slide shaft, and a bearing portion containing a plurality of linear bearings for guiding the slide shafts. An elastic rubber spring made of rubber or a rubber-like elastic material sandwiched between the push plate and the end surface of the bearing portion, and the slide shaft linearly moves according to expansion and contraction of the elastic rubber spring, whereby the scraping is performed. It is characterized in that the plate always maintains a predetermined cutting edge angle with respect to the belt.

The elastic rubber spring is cylindrical and has an annular groove having an arc-shaped cross section formed on the outer peripheral surface near both ends thereof. One elastic rubber spring or a plurality of elastic rubber springs connected in the compression direction are used. It is characterized by that.

Further, the blade edge angle of the scraping plate with respect to the belt is set to a constant angle between 120 ° and 150 °, and the pressing force of the scraping plate with respect to the belt is set to 6 to 8 kg per 100 mm of the scraping plate. It is what

[0014]

Since the scraping plate is pressed against the belt by using the elastic rubber spring having the constant reaction force region in the reaction force characteristic curve with respect to the amount of compression, the scraping plate is not affected by the wear of the scraping plate or the belt. The belt is pressed with a substantially constant pressing force. In this way, a high scraping efficiency can be obtained with a constant pressing force for a long period of time.

Further, the slide shaft holding the scraping plate is linearly moved in accordance with the expansion and contraction of the elastic rubber spring interposed between the push plate attached to the slide shaft and the end surface of the bearing portion of the slide shaft. By doing so, the angle of the scraping plate with respect to the belt is kept constant, and the slide shaft can move smoothly in response to wear of the scraping plate.

By using one elastic rubber spring or a plurality of elastic rubber springs connected in the compression direction, a substantially constant pressing force can be obtained within the range of the wear margin of the scraping plate and the belt. High scraping efficiency can be maintained without changing the plates frequently.

Further, by setting the blade edge angle of the scraping plate with respect to the belt to a constant angle between 120 ° and 150 °, optimum scraping efficiency can be obtained. Then, the pressing force of the scraping plate against the belt is set to the length 1 of the scraping plate.
By setting 6-8 kg per 00 mm, high scraping efficiency can be obtained without damaging the belt.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. An L-shaped arm 13 is attached to the device body 11 via a rubber spring 14. Device body 11
Further, the stopper 12 is provided so that its position can be adjusted, and the arm 13 can rotate in the clockwise direction against the force of the rubber spring 14, but cannot rotate in the counterclockwise direction. When a pressure equal to or higher than the set pressure of the rubber spring is applied, the arm is rotated clockwise around the rubber spring portion to prevent the belt from being damaged by the cleaner.

A box-shaped bearing portion 15 is fixed to the tip of the arm 13. In the bearing portion 15, the slide shaft 17 has a plurality of linear bearings 16 made of stainless steel.
Is slide-guided through. The slide shaft 17 is prevented from rotating with respect to the bearing portion 15 by the rotation stopper 19. Thus, the slide shaft 17
Is designed to smoothly move linearly.

A supporting piece 20 of a scraping plate (cleaner chip) 21 is detachably fixed to the tip of the slide shaft 17 through a bolt. In this example, two sets of cleaner chips are provided facing each other in the traveling direction of the belt B.
Cleaner chips are superalloy chips with excellent wear resistance.

The entire apparatus is covered with a vinyl sheet 22 in order to prevent dust and scraped transported materials from adhering to the movable parts. The push plate 17 is attached to the end of the slide shaft 17.
a is attached at a right angle, and a hollow cylindrical elastic rubber spring 18 is interposed between the push plate 17a and the end surface of the bearing portion 15. The elastic rubber spring 18 has, for example, the configuration shown in FIG. 5, and as shown in FIG. 6, has a constant reaction force region in the reaction force characteristic curve with respect to the compression amount. This elastic rubber spring is made of rubber or a rubber-like elastic material.

The elastic rubber spring 18 is, as shown in FIG.
An annular groove 18b having a semicircular cross section is formed near both ends of the outer peripheral surface of the cylindrical body 18a, and legs 18c are formed outside the annular groove. The flanges 18d are provided at both ends.

The annular groove 18b is for always producing stable buckling, and when an elastic compression force acts on the elastic rubber spring 18, the buckling deformation starts from the groove 18b. ing.

FIG. 7 shows a reaction force and a deformed state when the compression force in the axial direction acts on the elastic rubber spring 18. When the amount of compression is small (a), the elastic rubber spring is compressed almost uniformly as a whole, so that the amount of compression and the reaction force show a linear relationship.

When the compression reaches a certain level, the buckling deformation starts in the state of (b), that is, the main body part escapes (bends) outward from the annular groove as a starting point. Thus, when buckling occurs, the reaction force is dispersed outward. In other words,
A large amount of deformation occurs with a small force, and the constant reaction force region shown in (c) is present while the escape to the outside occurs.

Then, the compression further progresses, the escape in the outward direction disappears, and the buckling deformation disappears. After the time point shown in (d), the compression amount and the reaction force have a linear relationship. In this embodiment, the cleaner tip 21 is set so that a predetermined reaction force acts on the belt B in a state where the elastic rubber spring 18 is compressed corresponding to the wear allowance of the cleaner tip 21 of 10 mm. ing.

The state at this time is shown in FIG. The elastic rubber spring 18 is compressed by about 16 mm so that the pressing force of the cleaner tip 21 against the belt becomes about 7 kg / 100 mm. Then, even when the compression amount of the elastic rubber spring 18 becomes 6 mm according to the wear of the tip 21,
The pressing force is kept at about 7kg / 100mm.

Although the constant reaction force range and reaction force of the elastic rubber spring are approximately 7 kg / 100 mm in the range of 10 mm of 6 to 16 mm in the above embodiment, the constant reaction force range and reaction force of the elastic rubber spring are Can be changed according to its shape and dimensions (height, outer diameter, inner diameter, etc.). Further, when it is necessary to increase the width of the compression amount within the constant reaction force range, a plurality of elastic rubber springs may be connected in the compression direction. The reaction force is rubber,
It can also be changed by the rubber hardness.

Further, the cleaner tip 21 in this case
The blade edge angle with respect to the belt B is kept at 135 °. The scraping efficiency changes depending on the tip angle of the tip with respect to the belt. Here, the scraping efficiency is the ratio of the adhered amount of transported material before scraping to the adhered amount of transported material before scraping. The results of measuring the scraping efficiency at various angles are shown in FIG. 120 ° to 150 ° showed very high efficiency, and among them, the maximum value was shown at 135 °. Therefore, in the present invention, the tip angle of the tip relative to the belt is 120 ° to 1
It was constant within the range of 50 °.

Next, the pressing force of the chip against the belt will be described. As shown in FIG. 9, the relationship between the pressing force and the scraping efficiency has a tendency that the scraping efficiency increases almost in proportion to the pressing force regardless of whether the tip angle of the tip is 60 degrees or 120 degrees. . Therefore, from the viewpoint of scraping efficiency, it is clear that the higher the pressing force is, the better. Especially, when the tip angle used in this device is 120 degrees, it is almost 6kg / 100mm.
Since a scraping efficiency of 90% has been achieved with this device, the lower limit of the pressing force was 6 kg / 100 mm in this device.

On the other hand, when the pressing force is increased, there is a problem that the wear of the belt is accelerated, and from this point, the upper limit is naturally limited. FIG. 10 shows the result of an experimental investigation on the relationship between the amount of wear of the belt and the pressing force at a predetermined time. From this figure, it can be seen that the wear is rapidly accelerated when the pressing force is about 8 kg / 100 mm. Therefore, in this device, the pressing force is 6 to 6 in order to achieve both scraping efficiency and belt wear (protection).
Within the range of 8kg / 100mm.

[0032]

【The invention's effect】

1) The cleaner adjustment cycle could be extended from once every three to three months to once every year. 2) The cleaning efficiency of the cleaner is 60% when one conventional cleaner is installed, and 8 even when two cleaners are installed.
What was 0% was significantly improved to 88% with only one cleaner according to the present invention. Furthermore, when the cleaner according to the present invention and the conventional cleaner are used together, it is possible to improve the efficiency to 97%.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a conventional spring type cleaner.

FIG. 3 is an explanatory view of a conventional cushion / rubber type cleaner.

FIG. 4 is an explanatory diagram of a conventional air tube type cleaner.

FIG. 5 is an explanatory diagram of an example of an elastic rubber spring.

FIG. 6 is an explanatory diagram of an example of characteristics of an elastic rubber spring.

FIG. 7 is an explanatory diagram showing a relationship between a deformed state of an elastic rubber spring and a reaction force.

FIG. 8 is an explanatory view of the relationship between the angle of the tip with respect to the belt and the scraping efficiency.

FIG. 9 is an explanatory diagram of a relationship between pressing force and scraping efficiency.

FIG. 10 is an explanatory diagram of a relationship between pressing force and belt wear amount.

[Explanation of symbols]

15 ... Bearing part, 16 ... Linear bearing, 17 ... Slide shaft, 17a ... Push plate, 18 ... Elastic rubber spring, 20 ... Scraping plate (cleaner chip) support piece, 21 ... Scraping plate (cleaner chip).

 ─────────────────────────────────────────────────── ─── Continued Front Page (71) Applicant 000001199 Kobe Steel, Ltd. 1-3-18 Wakihama-cho, Chuo-ku, Hyogo Prefecture (71) Applicant 000005278 Bridgestone Corporation 1-10, Kyobashi, Chuo-ku, Tokyo No. 1 (72) Yutaka Ota, 1-2, Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Pipe Co., Ltd. (72) Nobuyoshi Sato, 1-2, Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Pipe Co., Ltd. (72) Inventor Shinichi Shibusawa, No. 3 in Hikari, Kashima-cho, Kashima-gun, Ibaraki Sumitomo Metal Industry Co., Ltd. Kashima Steel Works (72) Hiromitsu Ueki, No. 3 in Oshima, Kashima-machi, Kashima-gun, Ibaraki Kashima Co., Ltd. Inside the Steel Works (72) Hideki Ueda Inside the Kashima Works, Sumitomo Kinzoku Kogyo Co., Ltd. (72) Invention Akira Kato 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba Prefecture Kawasaki Steel Co., Ltd., Chiba Steel Works (72) Inventor Hiroyuki Fujikawa 1, Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture, Kawasaki Steel Co., Ltd. (72) Inventor Eiji Akimoto 2-3-2 Uchisaiwaicho, Chiyoda-ku, Tokyo Hibiya International Building, Kawasaki Steel Co., Ltd. (72) Kenji Miyazaki 1 Kanazawa-machi, Kakogawa-shi, Hyogo Kadogawa Works (72) ) Inventor Masayoshi Kato 2 Nadahamahigashi-cho, Nada-ku, Kobe-shi, Hyogo Stock Company Kobe Steel Works, Kobe Steel Works (72) Inventor Motosugi Sugisaki 1 Kashio-cho, Totsuka-ku, Yokohama, Kanagawa (72) Invention Person Masami Kojima 1 Kashio-cho, Totsuka-ku, Yokohama-shi, Kanagawa Within Bridgestone Co., Ltd. (72) Inventor Takao Yoshimoto 1 Kashio-cho, Totsuka-ku, Yokohama-shi, Kanagawa Within Bridgestone, Inc.

Claims (4)

[Claims] 1. In a scraper type belt cleaner device of a belt conveyor for removing a deposit on a belt by pressing a scraping plate against a belt surface through an elastic body, the elastic body has a reaction force characteristic curve with respect to a compression amount. A scraper type belt cleaner device using an elastic rubber spring made of rubber or a rubber-like elastic material having a reaction force region. 2. A slide shaft holding one or a plurality of scraping plates at one end, a push plate mounted at a right angle to the slide shaft, and a bearing portion containing a plurality of linear bearings for guiding the slide shafts. An elastic rubber spring made of rubber or a rubber-like elastic material sandwiched between the push plate and the end surface of the bearing portion, and the slide shaft linearly moves according to expansion and contraction of the elastic rubber spring,
The scraper type belt cleaner device according to claim 1, wherein the scraping plate always maintains a predetermined cutting edge angle with respect to the belt. 3. A rubber or rubber-like elastic material which is cylindrical and has a constant reaction force region in a reaction force characteristic curve with respect to a compression amount, which is formed by forming an annular groove having an arc-shaped cross section on the outer peripheral surface near both ends. 3. The scraper type belt cleaner device according to claim 2, wherein one elastic rubber spring is used or a plurality of elastic rubber springs are connected in the compression direction. 4. The blade edge angle of the scraping plate with respect to the belt is 12
A constant angle is set between 0 ° and 150 °, and the pressing force of the scraping plate against the belt is 6 per 100 mm of the scraping plate.
The scraper type belt cleaner device according to claim 3, wherein the scraper type belt cleaner device has a weight of 8 kg.