Discharging screw assembly of slaking machine

Abstract

The utility model discloses a discharging screw assembly of a slaking machine. The discharging screw assembly comprises a screw shaft, a feeding section, a conveying section, an extruding section and a discharging section are sequentially arranged on the screw shaft; the extrusion section is provided with a single thread; the discharging section is provided with a double-end thread; the screw pitch of the discharging section is Ia; the screw pitch of the extrusion section is Ib; the ratio of Ia to Ib is 1 / 2-3 / 5; the thread thickness Ea of the discharge section is 2-5mm thicker than the thread thickness Eb of the extrusion section; the ratio of the thread height Ha of the discharging section to the outer diameter Da of the discharging section is 1 / 5-1 / 4, and the thread height Ha of the discharging section is 3-6 mm smaller than the thread height Hb of the extrusion section. According to the proportional relation and the parameter relation, under the condition that the feed gelatinization degree is good, machine blockage can be prevented as much as possible, and meanwhile it is guaranteed that the yield of the slaughtering machine is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion and puffing, in particular to a discharging screw assembly of a Shuhua machine. Background Art

[0002] The Shuhua machine is mainly used to process mixed raw materials mainly composed of corn and soybean meal. Under the action of expansion heat treatment, the starch in the material is gelatinized and the protein is denatured, the anti-nutritional factors in the material are completely eliminated, and the Salmonella and E. coli in the raw materials are killed. The suckling pigs will not have diarrhea after eating, and the production is fast. The coarse crumb block material processed by the Shuhua machine can be packaged and sold as a finished product, or it can be granulated by a granulator at low temperature. The processed material is crispy on the outside and soft on the inside. The suckling pigs are very fond of eating, and the production is fast.

[0003] At present, there are many types of discharge screws in existing Shuhua machines, and the manufacturing methods, processing techniques and heat treatment processes are also different. According to long-term use observation, it is found that the discharge screws of existing Shuhua machines not only generally have poor wear resistance, short service life, poor feed expansion effect, but also easily cause material blocking and low production efficiency.

[0004] Therefore, it is necessary to design a discharging screw assembly of a Shuhua machine to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the deficiencies of the prior art and to provide a discharging screw assembly for a chemical machine.

[0006] The technical solution of the utility model is: a discharging screw assembly of a Shuhua machine, comprising a screw shaft; a feeding section, a conveying section, an extrusion section and a discharging section are arranged on the screw shaft in sequence; the extrusion section is a single-start thread; the discharging section is a double-start thread; the pitch of the discharging section is Ia; the pitch of the extrusion section is Ib; Ia / Ib is 1 / 2 to 3 / 5; the thread thickness Ea of the discharging section is 2 to 5 mm thicker than the thread thickness Eb of the extrusion section; the ratio of the thread height Ha of the discharging section to the outer diameter Da of the discharging section is 1 / 5 to 1 / 4, and the thread height Ha of the discharging section is 3 to 6 mm smaller than the thread height Hb of the extrusion section.

[0007] The thread of the discharge section is composed of a first spiral blade and a second spiral blade, and the first spiral blade and the second spiral blade have opposite rotation directions.

[0008] The screw shaft is provided with two raised flat keys equidistantly distributed along the circumferential direction on the inclined surface at one end of the discharge section.

[0009] The included angle between the flat key and the horizontal direction is X, and the range of X is 10-30°.

[0010] The ratio of the width Wa of the flat key to the thread thickness Ea of the discharge section is 2 / 5 to 1 / 2.

[0011] The second spiral blade adopts a three-dimensional Archimedean spiral line spiral surface structure.

[0012] The feeding section, the conveying section and the extrusion section are composed of the same thread.

[0013] The material of the first spiral blade and the second spiral blade is 38CrMoAl.

[0014] The outer surfaces of the first spiral blade and the second spiral blade of the discharge section are treated by a heat treatment process of vacuum sintering nickel-based tungsten carbide.

[0015] By adopting the above technical scheme, the utility model has the following beneficial effects: (1) the screw shaft of the utility model is provided with a feed section, a conveying section, an extrusion section and a discharge section in sequence, the extrusion section is a single-start thread, the discharge section is a double-start thread, and the ratio of the pitch of the discharge section to the pitch of the extrusion section is 1 / 2 to 3 / 5, the thread thickness Ea of the discharge section is 2 to 5 mm thicker than the thread thickness Eb of the extrusion section, the ratio of the thread height Ha of the discharge section to the outer diameter Da of the discharge section (5) is 1 / 5 to 1 / 4, and the thread height Ha of the discharge section is 3 to 6 mm smaller than the thread height Hb of the extrusion section; according to the above proportional relationship and parameter relationship, it can be ensured that when the degree of gelatinization of the feed is good, the machine blockage can be prevented to the greatest extent possible, and at the same time, the output of the gelatinizer can be greatly improved.

[0016] (2) The thread of the discharge section of the utility model is composed of a first spiral blade and a second spiral blade, which is easy to process.

[0017] (3) In the utility model, two raised flat keys are arranged equidistantly along the circumference on the inclined surface of one end of the discharge section of the new screw shaft, which is conducive to the rapid discharge of the feed after expansion by the Shuhua machine and increases the output by preventing the machine from being blocked.

[0018] (4) The second spiral blade of the utility model adopts a three-dimensional Archimedean spiral spiral surface structure, which can ensure that the feed is quickly gelatinized and agglomerated after the machine is turned on.

[0019] (5) The feed section, conveying section and extrusion section of the utility model are composed of the same thread, which is more convenient to process and has a lower processing cost.

[0020] (6) The material of the first spiral blade and the second spiral blade of the utility model is 38CrMoAl, which has higher structural strength.

[0021] (7) The outer surfaces of the first spiral blade and the second spiral blade of the utility model are treated by a vacuum sintering nickel-based tungsten carbide heat treatment process, so that the wear-resistant tungsten carbide layer can reach 1.5-2mm on a single side, which can greatly improve the wear resistance of the screw shaft and greatly increase the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0023] Figure 1 It is a structural schematic diagram of the utility model.

[0024] Figure 2 It is a side view of the utility model.

[0025] Figure 3 It is a schematic diagram of the distribution structure of the flat key of the utility model.

[0026] The reference numerals in the accompanying drawings are:

[0027] Screw shaft 1, feed section 2, conveying section 3, extrusion section 4, discharge section 5, first spiral blade 6, flat key 7, second spiral blade 8. DETAILED DESCRIPTION

[0028] (Example 1)

[0029] See Figures 1 to 3 A discharging screw assembly of a Shuhua machine in this embodiment includes a screw shaft 1; a feeding section 2, a conveying section 3, an extrusion section 4 and a discharging section 5 are sequentially arranged on the screw shaft 1; the extrusion section 4 is a single-start thread; the discharging section 5 is a double-start thread; the pitch of the discharging section 5 is Ia; the pitch of the extrusion section 4 is Ib; Ia / Ib is 1 / 2 to 3 / 5; the thread thickness Ea of the discharging section 5 is 2 to 5 mm thicker than the thread thickness Eb of the extrusion section 4; the ratio of the thread height Ha of the discharging section 5 to the outer diameter Da of the discharging section 5 is 1 / 5 to 1 / 4, and the thread height Ha of the discharging section 5 is 3 to 6 mm smaller than the thread height Hb of the extrusion section 4.

[0030] Furthermore, the thread of the discharge section 5 is composed of a first spiral blade 6 and a second spiral blade 8 , and the first spiral blade 6 and the second spiral blade 8 have opposite rotation directions.

[0031] Furthermore, the screw shaft 1 has two raised flat keys 7 equidistantly distributed along the circumferential direction on the inclined surface at one end of the discharge section 5, which is conducive to the rapid discharge of the feed after expansion by the Shuhua machine and increases the output by preventing machine blockage.

[0032] Preferably, the included angle between the flat key 7 and the horizontal direction is X, and the range of X is 10 to 30°.

[0033] Preferably, the ratio of the width Wa of the flat key 7 to the thread thickness Ea of the discharge section 5 is 2 / 5 to 1 / 2.

[0034] Furthermore, the second spiral blade 8 adopts a three-dimensional Archimedean spiral spiral surface structure, which can ensure that the feed is quickly gelatinized and agglomerated after the machine is turned on.

[0035] Furthermore, in order to facilitate processing, the feed section 2, the conveying section 3, and the extrusion section 4 are composed of the same thread.

[0036] Furthermore, the material of the first spiral blade 6 and the second spiral blade 8 is 38CrMoAl, which ensures the structural strength of the screw shaft 1.

[0037] Furthermore, the outer surfaces of the first spiral blade 6 and the second spiral blade 8 are treated by a heat treatment process of vacuum sintering nickel-based tungsten carbide, which can greatly improve the wear resistance of the screw shaft 1 and greatly increase the service life.

[0038] The discharging screw assembly of the Shuhua machine in this embodiment is provided with a feed section 2, a conveying section 3, an extrusion section 4 and a discharging section 5 on the screw shaft 1 in sequence. The extrusion section 4 is a single-start thread, the discharging section 5 is a double-start thread, and the ratio of the pitch of the discharging section 5 to the pitch of the extrusion section 4 is 1 / 2-3 / 5, the thread thickness Ea of the discharging section 5 is 2-5 mm thicker than the thread thickness Eb of the extrusion section 4, the ratio of the thread height Ha of the discharging section 5 to the outer diameter Da of the discharging section 5 is 1 / 5-1 / 4, and the thread height Ha of the discharging section 5 is 3-6 mm smaller than the thread height Hb of the extrusion section 4. According to the above-mentioned proportional relationship and parameter relationship, it can be ensured that when the degree of gelatinization of the feed is good, the machine blockage can be prevented to the greatest extent possible, and at the same time, the output of the Shuhua machine is greatly improved.

[0039] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A discharging screw assembly for a Shuhua machine, characterized in that: The invention comprises a screw shaft (1); the screw shaft (1) is provided with a feed section (2), a conveying section (3), an extrusion section (4) and a discharge section (5) in sequence; the extrusion section (4) is a single-start thread; the discharge section (5) is a double-start thread; the pitch of the discharge section (5) is Ia; the pitch of the extrusion section (4) is Ib; Ia / Ib is 1 / 2 to 3 / 5; the thread thickness Ea of the discharge section (5) is 2 to 5 mm thicker than the thread thickness Eb of the extrusion section (4); the ratio of the thread height Ha of the discharge section (5) to the outer diameter Da of the discharge section (5) is 1 / 5 to 1 / 4, and the thread height Ha of the discharge section (5) is 3 to 6 mm smaller than the thread height Hb of the extrusion section (4).

2. A discharging screw assembly for a Shuhua machine according to claim 1, characterized in that: The thread of the discharge section (5) is composed of a first spiral blade (6) and a second spiral blade (8), and the first spiral blade (6) and the second spiral blade (8) have opposite rotation directions.

3. A discharging screw assembly for a Shuhua machine according to claim 1, characterized in that: The screw shaft (1) has two protruding flat keys (7) equidistantly distributed along the circumferential direction on an inclined surface at one end of the discharge section (5).

4. A discharging screw assembly for a Shuhua machine according to claim 3, characterized in that: The included angle between the flat key (7) and the horizontal direction is X, and the range of X is 10-30°.

5. The discharging screw assembly of a Shuhua machine according to claim 3, characterized in that: The ratio of the width Wa of the flat key (7) to the thread thickness Ea of the discharge section (5) is 2 / 5 to 1 / 2.

6. A discharging screw assembly for a Shuhua machine according to claim 2, characterized in that: The second spiral blade (8) adopts a three-dimensional Archimedean spiral line spiral surface structure.

7. The discharging screw assembly of a Shuhua machine according to claim 1, characterized in that: The feeding section (2), the conveying section (3) and the extrusion section (4) are composed of the same thread.

8. The discharging screw assembly of a Shuhua machine according to claim 2, characterized in that: The material of the first spiral blade (6) and the second spiral blade (8) is 38CrMoAl.

9. The discharging screw assembly of a Shuhua machine according to claim 1, characterized in that: The outer surfaces of the first spiral blade (6) and the second spiral blade (8) of the discharge section (5) are treated by a heat treatment process of vacuum sintering nickel-based tungsten carbide.

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