CN110238026A - trommel screen - Google Patents

Abstract

The invention discloses a kind of rotary screens, the screen drum mounting base being oppositely arranged including two, the screen drum of tubular is installed between two screen drum mounting bases, it is equipped on the arrival end inner wall of screen drum several band-like and is in the entrance scraping blade being arranged circumferentially, it is equipped on the outlet end inner wall of screen drum several band-like and is in the outlet scraping blade being arranged circumferentially, entrance scraping blade, outlet scraping blade twist extends respectively along inboard wall of riddle drum, and the two is oppositely oriented, entrance scraping blade, it is close to inboard wall of riddle drum in the side for exporting scraping blade, the other side is hanging, and entrance scraping blade, it reverses in the opposite direction the rear and front end for exporting the hanging side of scraping blade.Additional ports scraping blade of the present invention and outlet scraping blade, are capable of increasing banana dasheen with the drop in screen drum rotary course, keep the soil on banana dasheen surface more easily separated；Effectively control desilts the time, makes to desilt effect more preferable.

Description

trommel screen

technical field

The invention belongs to the field of agricultural equipment, and in particular relates to a drum screen.

Background technique

Trommel screen is a kind of machinery widely used in sorting technology. It controls the sorting by particle size, and the sorting accuracy is high. When the material enters the screen cylinder, due to the inclination and rotation of the screen cylinder, the material on the screen surface is turned and rolled, the product under the screen is discharged from the screen hole of the screen cylinder, and the product on the screen is discharged through the discharge port at the tail of the screen cylinder.

In the field of modern agriculture, people use drum sieves to remove the sticky soil on the surface of canna taro to save manpower, but there are the following defects when using traditional drum sieves for desilting: 1. Due to the inclined placement of the screen drum, the banana taro stays in the screen drum The desilting time is too short to control the desilting time according to the actual situation; 2. The quality of the canna taro is relatively large, and it mainly stays in the lower part of the screen cylinder. During the rotation with the screen cylinder, the drop is small, and the soil is not easy to separate from the surface of the canna taro. The above problems lead to When the drum sieve is used to remove the mud from the plantain taro, the mud removal is not complete and the effect is poor.

Contents of the invention

In view of the above technical problems, the present invention aims to provide a trommel screen that can fully mix materials during the screening process to make the screening more thorough.

For this reason, the technical solution adopted by the present invention is: a trommel screen, comprising two oppositely arranged sieve cylinder mounting seats, a cylindrical sieve cylinder is installed between the two sieve cylinder mounting seats, On the inner wall of the inlet end of the sieve drum, several strip-shaped and uniformly arranged inlet scrapers are installed on the inner wall of the outlet end of the screen cylinder, and several strip-shaped and uniformly arranged outlet scrapers are installed on the inner wall of the outlet end of the screen cylinder. The scraper and the outlet scraper extend spirally along the inner wall of the sieve cylinder respectively, and the direction of rotation of the two is opposite. The front and rear ends of the impending side of the inlet scraper and the outlet scraper are twisted in opposite directions.

Preferably, the suspended side edges of the inlet scraper and the outlet scraper are arc-shaped, and the suspended side edge of each inlet scraper is projected into a circle in the axial direction of the screen cylinder, and the suspended side edge of each outlet scraper is in the The axial projection of the screen drum is circular. With the above structure, the width of the inlet scraper and the outlet scraper is uniform, and at the same time, the edge of the suspended side is prevented from being too sharp and scratching the plantain.

Preferably, the outlet scraper is longer than the inlet scraper. By adopting the above structure, the outlet scraper is more suitable for the banana taro with higher density near the outlet end of the screen drum.

Preferably, the cross-section of the screen cylinder is a regular polygon. With the above structure, the friction force between the canna and the inner wall of the screen cylinder is increased, so that the soil is easier to separate.

Preferably, the sieve drum is enclosed by several radially extending screens, and the screen holes at the joints of the screens are sparser than those at other positions. The above structure is adopted to ensure the strength of the joints of the screens and make the connection between the screens more stable and reliable.

Preferably, the sieve cylinder installation seat includes a cylinder and an annular positioning sleeve sleeved on the cylinder, and positioning protrusions are respectively provided on opposite sides of the two annular positioning sleeves, and the sieve cylinder is installed on the inner wall of the cylinder On the positioning seat, the inlet end of the sieve cylinder extends beyond the corresponding cylinder, the outlet end of the sieve cylinder is located in the cylinder, and the cylinder at the outlet end is longer than the cylinder at the inlet end. With the above structure, the annular positioning sleeve facilitates the installation and positioning of the screen cylinder; the inlet end of the screen cylinder extends beyond the corresponding cylinder, so that the banana can directly enter the screen cylinder, preventing the banana potato from being stuck in the installation seat of the screen cylinder; the screen cylinder The outlet end of the cylinder is located in the cylinder, and the cylinder at the outlet end is longer than the cylinder at the inlet end. When the banana taro is pushed out by the outlet scraper, the cylinder at the outlet end acts as a buffer to prevent the banana taro from being thrown out directly.

The beneficial effects of the present invention are: 1. Adding the inlet scraper and the outlet scraper can increase the drop of the canna during the rotation of the screen cylinder, making it easier to separate the soil on the surface of the canna; 2. The inlet scraper and the outlet scraper The direction of rotation is opposite. When the screen cylinder rotates in a specific direction, the inlet scraper and the outlet scraper can jointly push the canna to the middle of the screen cylinder, prolonging the desilting time of the canna in the screen cylinder. When the desilting is completed, the screen cylinder When rotating in the opposite direction, the outlet scraper can push the banana taro out of the screen cylinder, effectively controlling the desilting time and making the desilting effect better; 3. The front and rear ends of the suspended side of the inlet scraper and the outlet scraper Reversing in the opposite direction acts as a guide for the canna, and simultaneously prevents the canna from being stuck when moving between adjacent inlet scrapers or adjacent outlet scrapers.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural representation of the present invention (except part screen cloth);

Fig. 3 is the right view of Fig. 2;

Fig. 4 is the left view of Fig. 2;

Fig. 5 is a schematic diagram of the structure of the inlet scraper.

Detailed ways

Below by embodiment and in conjunction with accompanying drawing, the present invention will be further described:

As shown in Figures 1 to 5, a trommel screen consists of a screen cylinder 2 and two screen cylinder mounting bases 1, the two screen cylinder mounting bases 1 are arranged oppositely, the screen cylinder 2 is cylindrical, and is installed on two screen cylinder mounting bases 1. Between the cylinder mounting bases 1, a number of belt-shaped inlet scrapers 3 arranged evenly in the circumferential direction are installed on the inner wall of the inlet end of the screen cylinder 2; To the evenly arranged outlet scrapers 4, the inlet scrapers 3 and the outlet scrapers 4 extend in a spiral shape along the inner wall of the screen drum 2 respectively, and the direction of rotation of the two is opposite, and one side of the inlet scrapers 3 and the outlet scrapers 4 are tightly connected to each other. Paste the inner wall of the screen cylinder 2, and the other side is suspended, and the front and rear ends of the suspended side of the inlet scraper 3 and the outlet scraper 4 are twisted in opposite directions. In this embodiment, according to the average volume of the canna taro, four inlet scrapers 3 and four outlet scrapers 4 are provided. It can make the canna enter the sieve cylinder 2 evenly, and the canna can fully contact with the inner wall of the sieve cylinder 2, and enter with a certain height difference, so that the large pieces of soil can be separated more easily; the outlet scraper 4 can control the desilting of the canna in the sieve cylinder 2 Time: Only scrapers are set at the inlet and outlet ends of the screen cylinder 2, without occupying the inner space of the screen cylinder 2, and the cannas can fully rub against each other or the inner wall of the screen cylinder 2, so that the desilting effect is better.

As shown in Figures 3 and 4, the suspended side edges of the inlet scraper 3 and the outlet scraper 4 are arc-shaped, and the suspended side edges of each inlet scraper 3 are projected circularly in the axial direction of the screen cylinder 2, each The projection of the suspended side edge of the outlet scraper 4 in the axial direction of the screen cylinder 2 is a circle. In this embodiment, the axial projected area of the inlet scraper 3 and the outlet scraper 4 on the screen cylinder 2 accounts for about one-third of the screen cylinder 2, which can avoid blockage of the canna at the inlet or outlet of the screen cylinder 2 .

As shown in FIG. 2 , the length of the outlet scraper 4 is greater than that of the inlet scraper 3 . The entrance scraper 3 mainly plays the role of introducing plantain taro. In order to avoid occupying the space in the screen cylinder 2, the length is relatively short, while the outlet scraper 4 mainly plays a role in propulsion, so the length is longer to ensure the realization of the function.

As shown in Figures 1 and 2, the cross section of the screen cylinder 2 is a regular polygon. In this embodiment, the screen cylinder 2 is welded by eight radially extending and plate-shaped screens 201, and its cross section is a regular polygon. In a polygonal shape, the sieve holes at the junction of the sieve cloth 201 are sparser than the sieve holes at the rest of the positions.

As shown in Figures 1 and 2, the screen cylinder mounting base 1 includes a cylinder 101 and an annular positioning sleeve 102 sleeved on the cylinder 101, and positioning protrusions 102a are respectively provided on opposite sides of the two annular positioning sleeves 102, The sieve cylinder 2 is installed on the positioning seat 101a on the inner wall of the cylinder 101, the inlet end of the sieve cylinder 2 extends beyond the corresponding cylinder 101, the outlet end of the sieve cylinder 2 is located in the cylinder 101, and the cylinder 101 at the outlet end The cylinder 101 is longer than the inlet end.

Claims (6)

1. a kind of rotary screen, the screen drum mounting base (1) being oppositely arranged including two are installed between two screen drum mounting bases (1) There is the screen drum (2) of tubular, it is characterised in that: be equipped with several band-like on the arrival end inner wall of the screen drum (2) and be in circumferential The entrance scraping blade (3) being evenly arranged is equipped with several band-like on the outlet end inner wall of the screen drum (2) and is in circumferential uniform cloth The outlet scraping blade (4) set, the entrance scraping blade (3), outlet scraping blade (4) twist extend respectively along screen drum (2) inner wall, and two Person's is oppositely oriented, and inboard wall of riddle drum (2) are close in the entrance scraping blade (3), the side for exporting scraping blade (4), and the other side is hanging, and institute State entrance scraping blade (3), the rear and front end for the hanging side for exporting scraping blade (4) is reversed in the opposite direction.

2. rotary screen according to claim 1, it is characterised in that: the entrance scraping blade (3) and outlet scraping blade (4) it is hanging Side edge is arc, and the hanging side edge of each entrance scraping blade (3) is circle in the axis projection of screen drum (2), and each outlet is scraped The hanging side edge of piece (4) is circle in the axis projection of screen drum (2).

3. rotary screen according to claim 1 or 2, it is characterised in that: the length of outlet scraping blade (4) is scraped greater than entrance The length of piece (3).

4. rotary screen according to claim 1, it is characterised in that: the section of the screen drum (2) is regular polygon.

5. rotary screen according to claim 4, it is characterised in that: the screen drum (2) is by several sieves radially extended (201) it encloses, the sieve pore for being located at the sieve (201) junction is negligent of the sieve pore of remaining position.

6. rotary screen according to claim 1, it is characterised in that: the screen drum mounting base (1) includes cylinder (101) and set The circular orientation set (102) being located on cylinder (101) is respectively arranged with positioning in the opposite side of two circular orientation sets (102) Raised (102a), the screen drum (2) are mounted on the positioning seat (101a) on cylinder (101) inner wall, the entrance of the screen drum (2) End extends beyond corresponding cylinder (101) outside, and the outlet end of the screen drum (2) is located in cylinder (101), and the institute of outlet end State the cylinder (101) that cylinder (101) is longer than arrival end.