CN101837879A

CN101837879A - Screw sealing feeder

Info

Publication number: CN101837879A
Application number: CN 201010174331
Authority: CN
Inventors: 曹志德; 杨东进; 米志刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-17
Filing date: 2010-05-17
Publication date: 2010-09-22

Abstract

The invention relates to a screw sealing feeder. The screw sealing feeder comprises a screw blade, a main shaft, a machine body and a driving device, wherein the main shaft is arranged in the machine body; both ends of the main shaft are arranged in a bearing base, and one end is connected with the driving device; and the main shaft is fixedly connected with the screw blade, and the front edge of the screw blade is arranged on the back part of the material facing surface of a feeing port of the machine body. The screw sealing feeder has the advantages that: large-size materials are not blocked between the screw blade and the inner wall of the machine body; the front edge of the screw blade is of a curved surface, so that the operating resistance is small, and the driving energy consumption is low; the wear resistance is good, the service life is greatly prolonged, and the continuous operation time is over 4,000 hours; and a cooling water hole is formed in a cavity of the main shaft, so that the screw sealing feeder is suitable for processing the high-temperature bulk materials. The screw sealing feeder also has the advantages of simple and compact structure, high sealing property and reliable operation, and can be widely applied to the feeding of the solid bulk materials in industries such as metallurgy, electric power, coal, chemical engineering, building materials and the like.

Description

A kind of screw sealing feeder

Technical field

The invention belongs to the load transfer device field, relate to a kind of screw sealing feeder that is used for the conveying solid substance bulk material.

Background technology

Screw feeder is widely used in the solid bulk material feed of industries such as metallurgy, electric power, coal, chemical industry, building materials.Bulk material enters the spiral space that is made of helicallobe, main shaft and body inwall from inlet point, main shaft and helicallobe rotate under the driving of actuating device, helicallobe promotes material and advances, when feed end and discharge end have sealing requirements, the cavity of body inwall is circular, and the gap that the external diameter of its diameter and helicallobe constitutes is less, is called screw sealing feeder.

At present, the common weak point of prior art existence is:

1. be not suitable for the feed of bulk materials, particularly the material lumpiness is bigger and when hard, jam is serious, can't the long-term safety operation.Its reason is a material when entering inlet point and be subjected to helicallobe to promote to advance, meet the intersection of charge level and body inner chamber at inlet point, consult shown in Figure 1, A is the back of the body charge level of the inlet point 302 of body 3 among the figure, it is the material of the inlet point reciprocal one side of advancing, B is the charge level of meeting of inlet point 302, it is the one side of the material working direction of inlet point, because the gap of circle is less in helicallobe 1 outer rim and the body 3, bulk materials is easy to be blocked by the charge level B lower edge of meeting of blade outer rim and inlet point, in this case, there are two kinds of possibilities: the one, block the propulsive effort of the resistance of material greater than screw feeder, screw feeder main shaft 2 shuts down, and causes the interruption of production process; The 2nd, block the propulsive effort of the resistance of material less than screw feeder, bulk materials is squeezed broken, produces extra powder and makes helicallobe 1 and the aggravation of body 3 inner wall abrasion, and shorten service life.

2. resistance to abrasion is bad, is difficult to guarantee that long-time continuous runs without interruption, and when being used for systems such as chemical industry, metallurgy, requires screw feeder to turn round continuously for a long time, and service life, the screw feeder of prior art was difficult to meet the demands more than 4000 hours.

3. be not suitable for the higher bulk material feed of temperature.

Summary of the invention

The objective of the invention is to overcome above-mentioned the deficiencies in the prior art part and a kind of screw sealing feeder is provided, avoid the bulk materials jam, wear resisting property is good, increase the service life, continuous operation time is long, and reliable operation is suitable for the higher bulk material feed of temperature.

The technical solution used in the present invention: a kind of screw sealing feeder, comprise helicallobe, main shaft, body, actuating device, its main shaft is arranged in the body, two ends are arranged in the bearing seat, wherein an end connects with actuating device, be connected with helicallobe on the main shaft, the inlet point that the leading edge of described helicallobe is positioned at body is met the rear of charge level.

Described main shaft is a hollow structure, is provided with the cooling limber hole in the cavity of main shaft.

Described body, bearing seat are installed on the base, and body upper is provided with nitrogen inlet, inlet point, and underpart is provided with discharging opening, and the body two ends are equipped with end cap, and the body inwall is provided with abrasion-proof backing block.

On the main shaft in the body of described helicallobe between inlet point and discharging opening, helicallobe surface spraying weld wearing layer, the leading edge of helicallobe is a curved surface.

Described main shaft is provided with the additional thrust blade.

Described main shaft is obliquely installed, and its axis and horizon angle α are 5～30 °.

The present invention's advantage compared with prior art is:

1. because the leading edge of helicallobe is positioned at the rear of inlet point B face, so thoroughly eliminated the possibility of bulk materials jam between helicallobe and body inwall, bulk materials can be between helicallobe and body inwall jam, avoided the interruption of production process, reliable operation.

2. be provided with abrasion-proof backing block owing to the body inwall, and helicallobe surface spraying weld wearing layer, improved resistance to abrasion, prolonged service life greatly, make the screw feeder continuous operation time more than 4000 hours.

3. because main shaft is a hollow structure, and is provided with the limber hole carries out water flowing cooling in spindle cavity, serviceability temperature reaches 350 ℃, makes the screw feeder can the higher material of treatment temperature.

4. because the helicallobe leading edge is designed to curved surface, make the running resistance of screw feeder littler, it is lower to drive energy consumption.

5. complete machine structure is simply compact, and good leak tightness has the excellent technique performance, can be widely used in the solid bulk material feed of industries such as metallurgy, electric power, coal, chemical industry, building materials.

Description of drawings

Fig. 1 is the birds-eye view of the feeding inlet structure scheme drawing of existing screw sealing feeder;

Fig. 2 is the front view of the embodiment of the invention 1 structural representation;

Fig. 3 is a C-C cutaway view among Fig. 2;

Fig. 4 is a helicallobe leading edge shape of cross section scheme drawing among Fig. 2;

Fig. 5 is the front view of the embodiment of the invention 2 structural representations;

Fig. 6 is a D-D cutaway view among Fig. 5;

Fig. 7 is the front view of the embodiment of the invention 3 structural representations.

The specific embodiment

Embodiment 1

Consult Fig. 2, Fig. 3, shown in Figure 4, a kind of screw sealing feeder, mainly comprise parts and relevant control circuits such as helicallobe 1, main shaft 2, body 3, bearing seat 4, low-range reduction machine 5, reducing motor 6, base 7, end cap 8, abrasion-proof backing block 9, actuating devices such as its low-range reduction machine 5, reducing motor are prior art, buyable; Body 3, bearing seat 4 are installed on the described base 7, and main shaft 2 is arranged on body 3 centers, and two ends are arranged in the bearing seat 4, and wherein an end connects with low-range reduction machine 5 and reducing motor 6 output shafts by coupler; Body 3 tops are provided with nitrogen inlet 301, inlet point 302, body 3 bottoms are provided with discharging opening 303, and body 3 two ends are equipped with end cap 8, and body 3 inwalls are provided with abrasion-proof backing block 9, abrasion-proof backing block 9 can be selected the wear-resistant steel manufacturing for use, also can select non-metallic material manufacturings such as pottery for use; On the main shaft 2 in the body 3 between inlet point 302 and discharging opening 303, be welded with helicallobe 1, the effect of helicallobe 1 is to promote bulk material to advance, helicallobe 1 is formed through rolling or casting by steel, the surface spraying weld wearing layer, the leading edge 101 of helicallobe 1 is positioned at the rear that inlet point 302 is met charge level B, the leading edge 101 of helicallobe 1 is a curved surface, and the leading edge 101 of described helicallobe 1 is meant the end edge of helicallobe 1 in inlet point 302 directions; Described main shaft 2 is a hollow structure, is provided with cooling limber hole 201 in the cavity of main shaft 2.

The groundwork process of present embodiment 1: drive reducing motor 6, low-range reduction machine 5 by relevant control circuit, bulk material enters body 3 inner chambers from inlet point 302, body 3 inner chambers of inlet point 302 belows are filled up, and the lower edge of meeting charge level B from inlet point 302 is the front portion of boundary's landing at helicallobe 1 with the angle of rest (repose) oblique line E of its material, low-range reduction machine 5 drives main shaft 2 together with helicallobe 1 rotation, and helicallobe 1 promotion material advances to discharging opening 303 and finishes sealing feed process; When the feed end of screw sealing feeder or discharge end the two one of them are noxious gas, insert nitrogen at nitrogen inlet 301, leaking to body 3 inner chambers with small amount of nitrogen is that the thoroughly isolated noxious gas of cost leaks.

Embodiment 2

Consult Fig. 5, shown in Figure 6, have additional additional thrust blade 10 on the described main shaft 2, additional thrust blade 10 can make the material of body 3 inner chambers of inlet point 302 belows except advancing the helicallobe 1 according to material angle of rest (repose) oblique line E landing, also make material under the promotion of additional thrust blade 10, enter helicallobe 1, make the material ability of advancing stronger.All the other structures are with embodiment 1.

Embodiment 3

Consult shown in Figure 7, described main shaft 2 is obliquely installed, and its axis and horizon angle α are 5～30 °, makes the easier landing of material of body 3 inner chambers of inlet point 302 belows advance helicallobe 1, the material ability of advancing is stronger, and the propulsive effort of actuating device also can significantly reduce.All the other structures are with embodiment 1.

Claims

1. screw sealing feeder, comprise helicallobe, main shaft, body, actuating device, its main shaft is arranged in the body, two ends are arranged in the bearing seat, wherein an end connects with actuating device, be connected with helicallobe on the main shaft, the leading edge (101) that it is characterized in that described helicallobe (1) is positioned at the rear that the inlet point (302) of body (3) is met charge level (B).

2. screw sealing feeder according to claim 1 is characterized in that described main shaft (2) is a hollow structure, is provided with cooling limber hole (201) in the cavity of main shaft (2).

3. screw sealing feeder according to claim 1, it is characterized in that described body (3), bearing seat (4) are installed on the base (7), body (3) top is provided with nitrogen inlet (301), inlet point (302), body (3) bottom is provided with discharging opening (303), body (3) two ends are equipped with end cap (8), and body (3) inwall is provided with abrasion-proof backing block (9).

4. according to claim 1 or 3 described screw sealing feeder, it is characterized in that described helicallobe (1) is positioned on the main shaft (2) of the body (3) between inlet point (302) and the discharging opening (303), helicallobe (1) surface spraying weld wearing layer, the leading edge (101) of helicallobe (1) is a curved surface.

5. screw sealing feeder according to claim 1 is characterized in that described main shaft (2) is provided with additional thrust blade (10).

6. screw sealing feeder according to claim 1 is characterized in that described main shaft (2) is obliquely installed, and its axis and horizon angle α are 5～30 °.