CN108372111A - A kind of wedge-shaped fast tensioning device of plate and frame sieve - Google Patents

Abstract

The present invention relates to a kind of wedge-shaped fast tensioning devices of plate and frame sieve, it is made of wedge block, open rectangle pipe, wedge-shaped rack, gear shaft, plate and frame sieve, sieve supporting beam, gear shaft support base and sieve box side plate etc., wherein wedge block and sieve supporting beam are fixedly connected on sieve box side plate and the two is a certain included angle, gear shaft support base is fixedly mounted outside side plate, and gear shaft is mounted on gear shaft support base；Open rectangle pipe is welded below wedge block, wedge-shaped rack is mounted on by groove in open rectangle pipe.When tensioning apparatus works, the gear teeth on gear shaft are engaged with wedge-shaped rack, are realized wedge-shaped rack movement by turning gear wheel shaft, are thus met wedge-shaped rack and compress or loosen sieve, to achieve the purpose that quickly to be tensioned sieve.A kind of more traditional voussoir pressing device of wedge-shaped fast tensioning device of plate and frame sieve of the present invention, have many advantages, such as simple operation, tensile force controllably, be suitable for narrow space position.

Description

A wedge-shaped fast tensioning device for plate and frame screen

technical field

The invention relates to a wedge-shaped fast tensioning device for a plate and frame screen on a vibrating screen used in petroleum, mining, metallurgy and other industries.

Background technique

The sieve is the main part of the vibrating sieve to sieve solid phase particles, which plays the role of throwing particles and grading and screening. The screen surface of the screen is easy to wear during the screening process, and the screen needs to be replaced frequently. Therefore, the fast tensioning device has an important impact on improving the working efficiency of the vibrating screen. Traditional screen tensioning methods are roughly divided into three types: bolt tensioning, wedge compression and shaft winding. Among them, wedge compression is the most widely used. This tensioning method usually uses manual percussion to promote the wedge The block moves and the screen is fixed by wedge pressure. In the double-layer vibrating screen or the vibrating screen in the form of stepped screen arrangement, the lower screen adopts the wedge compression type, and it is difficult to perform wedge tightening and disassembly operations.

In order to solve the problems existing in the wedge pressing method, patent 2015204924371 discloses a tensioning wedge pressing device suitable for vibrating screens. Wedges are installed on the inner wall of the side plate of the vibrating screen, and the bolts are tightened to make the wedges produce a wedge against the inclined surface. The pressure realizes the pressing of the screen surface, but fixing one side of the screen requires multiple pressing devices, so this design is inconvenient when disassembling and assembling on site. Patent 201510007094.X is a frame screen fixing device for drilling fluid shale shaker. A rotating driving wheel is installed outside the screen box. The driving wheel drives the rack and wedge to move, and the pressing seat forces the wedge to move down to compress the frame screen. , The upper rack of the wedge block designed by this patent is arc-shaped. During the assembly and disassembly process, the center distance between the gear and the rack is not fixed, the wedge block will fall off, and the wedge block must be reinstalled every time it is assembled and disassembled. Patent 2016203066005 proposes a quick-pressing device for vibrating screen frame and screen. The working principle is to install a clamping claw on the outside of the eccentric shaft, and rotate the eccentric shaft so that the clamping claw drives the wedge to move to further fix the frame screen. This method ignores the clamping device Anti-loose design, the exciting force of the vibrating screen will make the eccentric shaft loose when the vibrating screen works for a long time, and finally the screen cannot be tightened.

In order to overcome the disadvantages of the above-mentioned wedge-shaped block tensioning device, a wedge-shaped fast tensioning device of the plate and frame screen of the present invention is proposed.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a wedge-shaped fast tensioning device for plate and frame screens. By optimizing the structure of the wedge-shaped fast tensioning device, the existing tensioning device has low working efficiency and poor firming effect. And other issues.

In order to achieve the above object, the present invention adopts the following technical solutions.

The present invention is a wedge-shaped fast tensioning device for a plate-and-frame screen, which consists of a wedge seat, an open rectangular tube, a wedge-shaped rack, a gear shaft, a plate-and-frame screen, a screen support beam, a gear shaft support seat, and a side of a screen box. board composition.

The wedge base and the screen support beam are fixedly connected to the side plate of the screen box, and the opening of the rectangular tube is welded on the wedge base downwards; there is a certain angle between the wedge base and the screen support beam. The maximum value shall not exceed the allowable friction angle between the wedge rack and the wedge seat and the screen support beam; the wedge angle adopted by the wedge rack is the same as the angle between the wedge seat and the screen support beam, and the small end of the upper slope shall be The gear teeth are set on the side, and the length of the tooth opening section must ensure that the wedge rack can be wedged tightly. Symmetrical grooves are set on both sides of the wedge rack, and the upper plane of the groove is parallel to the upper slope of the wedge rack; the opening is rectangular The pipe snaps into grooves on both sides of the wedge rack, and the grooves keep the wedge rack at a relatively fixed center distance from the gear shaft during movement.

The gear shaft support base is fixedly connected to the side plate of the screen box, the gear shaft is installed on the gear shaft support base, and its gear teeth mesh with the gear teeth on the wedge rack. When the gear shaft rotates clockwise, it drives the wedge gear The bar moves to the left, and the wedge rack is wedged tightly, so that the plate and frame screen is pressed by the wedge rack; when the gear shaft rotates counterclockwise, it drives the wedge rack to move to the right, and the wedge rack is released, so that the plate and frame The frame screen is loosened.

The wedge base has an L-shaped structure, and its vertical part is fixedly connected with the side plate of the screen box. A gap of a certain width is opened in the middle section of the lower horizontal part. Notches of the same length to ensure that the gear shaft and the tooth portion of the wedge rack can mesh.

The advantages of the present invention are: (1) During the fastening process, the tensioning pressure required by the wedge can be controlled more accurately by controlling the torque of the rotating gear shaft. (2) During the assembly and disassembly process, the wedge-shaped block will not fall off, and it can ensure a relatively fixed center distance between the gear and the rack. The operation is easy and the screen replacement efficiency is high. (3) The structure is simple and compact, it takes up less space, and it is easy to install and disassemble, especially suitable for vibrating screens with small space in the screen box.

Description of drawings

Fig. 1 is the front view of the structural schematic diagram of the wedge-shaped quick tensioning device of the plate and frame screen of the present invention.

Fig. 2 is the right view of the structural schematic diagram of the wedge-shaped quick tensioning device of the plate and frame screen of the present invention.

In the picture: 1. Wedge seat, 2. Open rectangular tube, 3. Wedge rack, 4. gear shaft, 5. Plate and frame screen, 6. Screen support beam, 7. Gear shaft support seat, 8. Screen box side panels.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. The schematic embodiments of the present invention and their descriptions are only used to explain the present invention, and are not intended as an explanation of the present invention. limited.

As shown in Figure 1 and Figure 2, a wedge-shaped fast tensioning device for a plate-and-frame screen of the present invention consists of a wedge seat 1, an open rectangular tube 2, a wedge-shaped rack 3, a gear shaft 4, and a plate-and-frame screen 5. The screen support beam 6, the gear shaft support seat 7, and the screen box side plate 8 are composed.

The wedge base 1 and the screen support beam 6 are fixedly connected to the screen box side plate 8, and the opening of the rectangular pipe 2 is welded on the wedge base 1 downward; the wedge base 1 and the screen support beam 6 have a certain The included angle and the maximum value of the included angle shall not exceed the friction angle allowed by the material of the wedge rack 3 and the wedge seat 1 and the screen support beam 6; The included angles between them are the same, and gear teeth are provided on the side of the small end of the upper inclined surface. The length of the teeth opening section must ensure that the wedge rack 3 can be wedged tightly, and symmetrical grooves are provided on both sides of the wedge rack 3. The upper plane of the groove is parallel to the upper slope of the wedge rack 3; the open rectangular tube 2 snaps into the grooves on both sides of the wedge rack 3, and the groove keeps the wedge rack 3 relatively close to the pinion shaft 4 during the movement. Fixed center distance.

The gear shaft support seat 7 is fixed on the outside of the screen box side plate 8, the gear shaft 4 is installed on the gear shaft support seat 7, and its gear teeth mesh with the gear teeth on the wedge rack 3. When the gear shaft 4 rotates clockwise , which drives the wedge rack 3 to move to the left, and the wedge rack 3 is wedged tightly, so that the plate and frame screen 5 is pressed tightly by the wedge rack 3; when the gear shaft 4 rotates counterclockwise, it drives the wedge rack 3 to Moving to the right, the wedge-shaped rack 3 is loosened, so that the plate-and-frame screen 5 is loosened.

The wedge base 1 has an L-shaped structure, its vertical part is welded to the side plate 8 of the screen box, and a gap of a certain width is opened in the middle section of the lower horizontal part. The position offers the breach of same length, to guarantee that the gear tooth part of pinion shaft 4 and wedge rack 3 can engage.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (4)

1. A wedge-shaped fast tensioning device for a plate-and-frame screen, which consists of a wedge seat (1), an open rectangular tube (2), a wedge-shaped rack (3), a gear shaft (4), and a plate-and-frame screen (5 ), the screen support beam (6), the gear shaft support seat (7), and the screen box side plate (8), and it is characterized in that the wedge seat (1) and the screen support beam (6) are fixedly connected to the screen box side On the plate (8), the open rectangular tube (2) opens downward and is welded on the wedge seat (1), the gear shaft support seat (7) is fixed on the outside of the side plate (8) of the screen box, and the gear shaft (4) is Installed on the gear shaft support seat (7), the gear and the wedge rack (3) mesh with each other, and the two sides of the wedge rack (3) are provided with symmetrical grooves, and the upper plane of the groove and the upper part of the wedge rack (3) The slopes are parallel, and the wedge-shaped rack (3) is embedded in the open rectangular tube (2), and its groove keeps the wedge-shaped rack (3) at a relatively fixed center-to-center distance from the gear shaft (4) during movement. 2. A wedge-shaped fast tensioning device for a plate-and-frame screen according to claim 1, characterized in that: there is a certain angle between the wedge seat (1) and the screen support beam (6), and the included angle The maximum value does not exceed the allowable friction angle between the wedge rack (3) and the wedge seat (1) and screen support beam (6). 3. A wedge-shaped fast tensioning device for a plate-and-frame screen according to claim 1, characterized in that: the wedge angle used by the wedge rack (3) is compatible with the wedge seat (1) and the screen support beam (6) ) have the same angle. 4. A wedge-shaped fast tensioning device for a plate-and-frame screen according to claim 1, characterized in that: a gap of a certain width is opened in the middle section of the lower part of the wedge seat (1), which is connected with the open rectangular tube (2). The upper gaps are the same length.