CN103801123B - The discharge method of the scalable circular slab filter press of high pressure, automatically scraping mechanism and automatically scraper - Google Patents

Abstract

The invention relates to a material unloading method of a high-pressure retractable circular plate filter press, an automatic material scraping mechanism capable of realizing the method, and an automatic material scraper equipped with the automatic material scraper mechanism. The unloading method of the high-pressure retractable circular plate filter press includes the following steps: ①Preparation for unloading; ②Precise positioning; ③Up and down scraping; ④Rotary scraping. The unloading method of "shoveling with straight shovel first, then rotary scraping with scraper" proposed by the present invention has had a profound impact on the unloading of the high-pressure retractable circular plate filter press, changing the current situation that can only rely on manual unloading. Backward mode; the automatic unloading mechanism provided by the invention not only unloads cleanly, but also has high efficiency, and has the function of one delivery and two up when unloading; there is also a micro-motion spring between the large and small scrapers of the present invention, which can realize the scraper and the circular feeder. The soft contact of the shaped plate is beneficial to the protection of the filter cloth on the surface of the circular plate.

Description

Unloading method, automatic scraping mechanism and automatic scraping machine of high-pressure retractable circular plate filter press

technical field

The present invention relates to a discharge method of a high-pressure retractable circular plate filter press, an automatic scraper mechanism capable of realizing the method, and an automatic scraper equipped with the automatic scraper mechanism.

Background technique

The high-pressure retractable circular plate filter press is a large-scale intermittent pressurized filtration equipment with good filtration effect and low moisture content of filter cake. After the material is squeezed, it forms a filter cake on the surface of the filter cloth between the partitions, and it needs to be unloaded before it can be squeezed again. The filter press unit of the high-pressure retractable circular plate filter press is a filter press chamber, and each press filter chamber is composed of a circular flat plate and a cavity plate, and the cavity plate has a ring-shaped protrusion near its edge. When the high-pressure retractable circular plate filter press is filtering, the material is pumped into the filter chamber through the hole in the middle of the circular plate, and then the purpose of pressing is achieved by the mutual extrusion of the flat plate and the cavity plate. Sometimes the filter cake is produced on a flat plate, sometimes on a plate with a cavity. When the filter cake is on a flat plate, it is more convenient to handle. When the filter cake is produced on a plate with a cavity, due to the obstruction of the ring protrusion, the filter cake fits very tightly. , the traditional unloading method is almost impossible to handle. At present, most of the enterprises that use high-pressure retractable circular plate filter presses use manual scraping.

Contents of the invention

One of the objectives of the present invention is to provide a discharge method for a high-pressure retractable circular plate filter press.

The present invention achieves the above object technical scheme as follows:

The unloading method of a high-pressure retractable circular plate filter press includes the following steps:

①Unloading preparation: the filter chamber of the high-pressure retractable circular plate filter press is opened;

②Precise positioning: The unloading mechanism extends into the opened filter chamber and gradually approaches the circular plate covered with filter cake. When the unloading mechanism is attached to the circular plate, the force detection device of the unloading mechanism detects Force signal, when the value of the force signal reaches the set value, the microcomputer control chip makes an instruction to stop the mechanism that adjusts the position of the unloading mechanism, thereby completing precise positioning;

③Up and down scraping: After the positioning is completed, the lifting scraper blade of the unloading mechanism is inserted into the initial gap between the circular plate and the filter cake, and with the downward scraping action of the lifting scraper blade, the filter cake is partially separated from the circular plate At the same time, with the completion of the downward scraping action of the lifting scraper blade, the positioning of the rotary scraper of the unloading mechanism is also realized;

④ Rotary scraping: The rotary scraper rotates, and the remaining filter cake on the surface of the circular plate is scraped off.

In this field, there are direct scraping method and varicose vibration method for unloading by machinery. The direct scraping method is only suitable for the situation where the filter cake is produced on a flat plate, and the filter cake of the high-pressure retractable circular plate filter press is prolific. For the plate with a cavity, and the plate with a cavity has a ring-shaped protrusion near its edge, the direct scraping method is not applicable due to the obstruction of the ring-shaped protrusion; The structure of the plate filter press is modified, which means that the enterprise suspends production and increases additional expenses. Therefore, how to solve the problem of fast unloading in the field of high-pressure retractable circular plate filter presses has become an urgent problem in this field. And the blanking mode of "shovel straight shovel first, scraper rotary scrape later" that the present invention proposes in good time has become a guiding light to solve the above-mentioned difficult problem.

In the above technical solution of the present invention, the unloading mechanism needs to continuously enter and exit between the opened filter chambers, that is, to repeatedly send and receive the knife, and the time consumption of feeding and closing the knife determines the efficiency of unloading. In the above-mentioned technical solution of the present invention, especially the transition connection between the upper and lower scraping materials and the rotating scraping materials is particularly efficient. To achieve the goal of "one delivery, two delivery", that is, the action of scraping up and down is coupled with the preparation process of rotary scraping. When the downward scraping action of the lifting scraper blade is completed, the positioning of the rotating scraper is also completed, which greatly improves the production efficiency.

In the above technical solution of the present invention, the circular plate is described from the perspective of shape. From the structural point of view, it can be divided into a flat plate and a cavity plate. Both the flat plate and the cavity plate are circular, and both can be called circular plates. . Two adjacent circular plates must have a flat plate and a cavity plate, therefore, when the two adjacent circular plates are closed, they form a press filter cavity.

In the above technical solution of the present invention, when the filter cake is not processed on the circular plate, there will be a gap between the edge of the filter cake and the circular plate, and when a shovel is inserted from the gap, the filter cake is most likely to be completely removed; this gap is called the initial gap. Because when the filter cake is being unloaded, because the edge is constantly being changed, its gap is also changing; so the gap in the initial state of unloading is called the initial gap.

As a preference of the above technical solution, when the up and down scraping steps are completed, the lifting scraper blade moves to the limit position; when the lifting scraper blade is at the limit position, the rotating scraper is at the radius position of the circular plate; The length of the rotating scraper is not greater than the radius of the circular plate.

In the above-mentioned technical scheme of the present invention, the circular plate can be a flat plate or a plate with a cavity. When the circular plate is a plate with a cavity, the radius of the circular plate does not include the annular protrusion on its edge; at the same time, the length of the rotary scraper It refers to the length of the effective section of the rotary scraper. From the attached figure, we can see that the rotary scraper extends in two directions at its connection, and the longer part is defined as the effective section. The existence of the other section not only guarantees In addition to the connection strength, there is also a certain balance effect when rotating.

The second object of the present invention is to provide an automatic scraping mechanism suitable for the above-mentioned unloading method.

The technical scheme that the present invention realizes second purpose is as follows:

An automatic scraper mechanism suitable for the above unloading methods, including a scissor scraper assembly and a rotary scraper assembly;

The scissor-type scraper assembly includes a pair of hinged scissor-type lifting pieces, a fixed piece that provides a limit groove for the hinge point of the hinged scissor-type lifting pieces, and a pair of connecting pieces to control the lifting of the scissor-type lifting piece telescoping rod and a pair of lifting scraper blades; the scissor lifting piece has a scissors mouth and a scissor handle because of being hinged, one end of the connecting piece is hinged on the fixed piece to form the starting point of the scissor lifting, and the other end is hinged on the On the scissor handle; the lifting scraper blade is set on the scissor nozzle; driven by the telescopic rod, the lifting scraper blade scrapes material up and down relying on the scissor movement of the scissor lifting piece;

The rotary scraper assembly includes a rotary motor and a rotary scraper arranged on an output shaft of the rotary motor; the rotary scraper is driven by the rotary motor to rotate and scrape materials.

The present invention creatively proposes the blanking method of "shoveling straight shovel first, then rotary scraping with scraper", so that the scissor scraper assembly and the rotary scraper assembly are combined together to complete the pressing of the high-pressure retractable circular plate. The unloading of the filter has obvious technical effects. In the present invention, the scraper connected to the scissor-type lifting piece is equivalent to a spatula, which can separate the filter cake from the cavity plate, and the residual filter cake on the cavity plate can be scraped away by the rotation of the rotary scraper. The rotation is based on the hole in the center of the plate with a cavity as the center, and the blade of the rotary scraper is used as a radius to rotate in the filter press chamber with a plate cavity. Through this rotation, the filter cake of the high-pressure retractable circular plate filter press scraped off.

As a preference of the above technical solution, the end of the telescopic rod is fixed at the hinge of the scissor nozzle or the scissor lift piece.

As a preference of the above technical solution, the telescopic rod is an air cylinder.

As a preference of the above technical solution, the rotary scraper assembly further includes a compression spring; the compression spring is arranged between the rotary scraper and the rotary motor body, enabling the rotary scraper to swim along the output shaft of the rotary motor move.

As a preference of the above technical solution, the lifting scraper blade includes a large scraper, a small scraper hinged to the large scraper, a micro-motion spring and a bolt;

The large scraper is fixed on the scissors;

The bolt connects the large scraper and the small scraper, and the fretting spring is placed at the position where the bolt covers the washer, so as to realize the flexible connection between the large scraper and the small scraper.

As a preference of the above technical solution, the large scraper and the small scraper are connected by a hinge, the blade surface of the small scraper is an isosceles trapezoid, and the working end and the connecting end of the small scraper form the isosceles trapezoid. The upper and lower bottom edges, the working end is narrower than the connecting end.

In the above technical solution of the present invention, the working end of the small scraper refers to the side of the small scraper used to contact the filter cake, and the connecting end of the small scraper is the side where the small scraper is connected to the large scraper.

As a preference of the above technical solution, a force detection device is also included, the small scraper is subjected to force due to contact, and the force detection device is used to detect the magnitude of the force.

The third object of the present invention is to provide an automatic scraper.

The technical scheme that the present invention realizes the third purpose is as follows:

An automatic scraper with the above-mentioned automatic scraper mechanism.

In summary, the present invention has the following technical effects:

1. The unloading method of "first shovel straight shovel, then rotary scraper scraper" proposed by the present invention has had a profound impact on the unloading of the high-pressure retractable circular plate filter press, changing the current situation that can only rely on manual unloading. The backward way of materials;

2. The automatic unloading mechanism provided by the present invention not only unloads cleanly, but also has high efficiency, and has the function of one delivery and two delivery when unloading;

3. A micro-motion spring is also arranged between the large and small scrapers of the present invention, which can realize the soft contact between the scraper and the circular plate, and is beneficial to the protection of the filter cloth on the surface of the circular plate.

Description of drawings

Fig. 1 is a schematic diagram of the front view of the present invention;

Fig. 2 is a schematic side view of the present invention;

Fig. 3 is a schematic diagram of scraping material up and down in the present invention;

Fig. 4 is a schematic diagram of the rotary scraping material of the present invention.

In the figure, 1-circular plate, 21-scissor, 22-scissor handle, 3-fixed piece, 4-connecting piece, 5-telescopic rod, 61-big scraper, 62-small scraper, 63-micro spring, 64-bolt, 65-hinge, 7-rotary motor, 8-rotary scraper, 9-compression spring, 10-force detection device, 11-complete filter cake, 12-residual filter cake.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

This specific embodiment is only an explanation of the present invention, but not a limitation of the present invention. Any modifications made by those skilled in the art after reading the description of the present invention will be protected by the patent law as long as they are within the protection scope of the claims.

As shown in Figure 3-4, the unloading method of the high-pressure retractable circular plate filter press includes the following steps:

①Unloading preparation: the filter chamber of the high-pressure retractable circular plate filter press is opened, and the complete filter cake 11 is produced on the cavity plate (circular plate 1);

②Precise positioning: The unloading mechanism extends into the opened filter chamber and gradually approaches the cavity plate (circular plate 1) covered with filter cake. When the unloading mechanism is attached to the cavity plate (circular plate 1) When the force detection device of the unloading mechanism detects the force signal, when the value of the force signal reaches the set value, the microcomputer control chip makes an instruction to stop the mechanism that adjusts the position of the unloading mechanism, thereby completing precise positioning. ;

③Up and down scraping: After the positioning is completed, the small scraper 62 of the unloading mechanism is inserted into the initial gap between the cavity plate (circular plate 1) and the filter cake. With the downward scraping action of the small scraper 62, the filter cake is large The part is separated from the cavity plate (circular plate 1); at the same time, with the completion of the scraping action of the small scraper 62, the positioning of the rotary scraper 8 is also completed;

④ Rotary scraping: The rotary scraper 8 rotates, and the remaining filter cake 12 on the surface of the cavity plate (circular plate 1) is scraped off.

When the upper and lower scraping steps are completed, the small scraper 62 moves to the limit position; when the small scraper 62 is at the limit position, the rotary scraper is at the radius position of the cavity plate (circular plate 1); the rotary scraper The length of 8 is not greater than the radius of the cavity plate (circular plate 1).

The direction shown by the arrow in Figure 3 is the direction of scraping up and down; the direction shown by the arrow in Figure 4 is the direction of rotating scraping.

As shown in Figure 1-2, the automatic scraping mechanism includes a scissor-type scraper assembly and a rotary scraper assembly; the scissor-type scraper assembly includes a pair of hinged scissor-type lifting pieces, which are hinged The hinge point of the sheet provides the fixed sheet 3 of the limit groove, a pair of connecting sheets 4, a telescopic rod 5 for controlling the lifting of the scissor lifting sheet and a pair of lifting scraper blades; the scissor lifting sheet has a scissor mouth due to hinge 21 and scissor handle 22, one end of the connecting piece 4 is hinged on the fixed piece 3 to form the starting point of the scissor lift, and the other end is hinged on the scissor handle 22; the lifting scraper blade is arranged on the scissors Nozzle 21; the lifting scraper blade is driven by the telescopic rod 5, relying on the scissor movement of the scissor lift sheet to scrape up and down; the rotary scraper assembly includes a rotary motor 7 and is arranged on the rotary motor The rotary scraper 8 on the output shaft of 7; the rotary scraper 8 rotates scraping material driven by the rotary motor 7. The end of the telescopic rod 5 is fixed at the hinge of the scissors 21 or the scissor lift piece. The telescopic rod 5 is an air cylinder. The rotary scraper assembly also includes a compression spring 9; the compression spring 9 is arranged between the rotary scraper 8 and the body of the rotary motor 7, enabling the rotary scraper 8 to swim along the output shaft of the rotary motor 7 . The lifting scraper blade includes a large scraper 61, a small scraper 62 hinged to the large scraper 61, a micro spring 63 and a bolt 64; the large scraper 61 is fixed to the scissors 21; the bolt 64 is connected to the The large scraper 61 and the small scraper 62 are described, and the fretting spring 63 is placed at the position where the bolt 64 covers the washer, so as to realize the flexible connection between the large scraper 61 and the small scraper 62 . The large scraper 61 and the small scraper 62 are connected by a hinge 65, the blade surface of the small scraper 62 is an isosceles trapezoid, and the working end and the connecting end of the small scraper 62 form the upper and lower bottoms of the isosceles trapezoid edge, the working end is narrower than the connecting end. It also includes a force detection device 10, the small scraper 62 is subjected to force due to contact, and the force detection device 10 is used to detect the magnitude of this force.

An automatic scraper with the above-mentioned automatic scraper mechanism.

Claims (10)

1. The unloading method of the high-pressure retractable circular plate filter press includes the following steps: ①Unloading preparation: the filter chamber of the high-pressure retractable circular plate filter press is opened; ②Precise positioning: The unloading mechanism extends into the opened filter press chamber and gradually approaches the circular plate (1) covered with filter cake. When the unloading mechanism is attached to the circular plate (1), the unloading mechanism The force detection device detects the force signal, and when the value of the force signal reaches the set value, the microcomputer control chip makes an instruction to stop the mechanism that adjusts the position of the unloading mechanism, thereby completing precise positioning; ③Up and down scraping: After the positioning is completed, the lifting scraper blade of the unloading mechanism is inserted into the initial gap between the circular plate (1) and the filter cake. With the downward scraping action of the lifting scraper blade, the filter cake is partially separated from the Circular plate (1); at the same time, with the completion of the downward scraping action of the lifting scraper blade, the positioning of the rotary scraper of the unloading mechanism is also completed; ④Rotary scraping: The rotary scraper rotates, and the remaining filter cake on the surface of the circular plate (1) is scraped off. 2. The unloading method of a high-pressure retractable circular plate filter press according to claim 1, characterized in that: when the upper and lower scraping steps are completed, the lifting scraper blade moves to the limit position; when the lifting scraper blade is in the When the above limit position is reached, the rotary scraper is at the radius position of the circular plate (1); the length of the rotary scraper is not greater than the radius of the circular plate (1). 3. The automatic scraping mechanism applicable to the unloading method as claimed in claim 1 or 2, comprising a scissor scraper assembly and a rotary scraper assembly; The scissor-type scraper assembly includes a pair of hinged scissor-type lifting pieces, a fixed piece (3) that provides a limit groove for the hinge point of the hinged scissor-type lifting pieces, a pair of connecting pieces (4), and a control unit The telescopic rod (5) for lifting and lowering the scissor lifting piece and a pair of lifting scraper blades; the scissor lifting piece has a scissor mouth (21) and a scissor handle (22) due to hinged connection, and one end of the connecting piece (4) It is hinged on the fixed piece (3) to form the starting point of scissor lifting, and the other end is hinged on the scissor handle (22); the lifting scraper blade is set on the scissor nozzle (21); the lifting scraper Driven by the telescopic rod (5), the piece relies on the scissor movement of the scissor lifting piece to scrape up and down; The rotary scraper assembly includes a rotary motor (7) and a rotary scraper (8) arranged on the output shaft of the rotary motor (7); the rotary scraper (8) is driven by the rotary motor (7) Rotate scraper. 4. The automatic scraping mechanism according to claim 3, characterized in that: the end of the telescopic rod (5) is fixed at the hinge of the scissors (21) or the scissor lift piece. 5. The automatic scraping mechanism according to claim 3, characterized in that: the telescopic rod (5) is an air cylinder. 6. The automatic scraping mechanism according to claim 3, characterized in that: the rotary scraper assembly further includes a compression spring (9); the compression spring (9) is arranged on the rotary scraper (8) Between the body of the rotary motor (7), the rotary scraper (8) can move along the output shaft of the rotary motor (7). 7. The automatic scraping mechanism according to claim 3, characterized in that: the lifting scraper blade includes a large scraper (61), a small scraper (62) hinged to the large scraper (61), a micro-motion spring (63) and bolt (64); The large scraper (61) is fixed on the scissors (21); The bolt (64) connects the large scraper (61) and the small scraper (62), and the fretting spring (63) is placed at the position where the bolt (64) sleeves the washer, thereby realizing the A flexible connection between the large scraper (61) and said small scraper (62). 8. The automatic scraping mechanism according to claim 7, characterized in that: the large scraper (61) and the small scraper (62) are connected by a hinge (65), and the knife of the small scraper (62) The surface is an isosceles trapezoid, the working end and the connecting end of the small scraper (62) constitute the upper and lower bottom edges of the isosceles trapezoid, and the working end is narrower than the connecting end. 9. The automatic scraping mechanism according to claim 7, characterized in that it further comprises a force detection device (10), the small scraper (62) is subjected to force due to contact, and the force detection device (10) uses to detect the magnitude of this force. 10. An automatic scraper with an automatic scraper mechanism according to claims 3-8.