A kind of exhaust type barrel capable of preventing overflow

Abstract

A venting barrel capable of preventing overflowing includes a barrel, a barrel recess is provided in the middle of the barrel, exhaust holes are provided on the bottom surface of the barrel recess, the exhaust holes are connected to the inner hole of the barrel, an anti-overflow device is detachably connected in the barrel recess, a ventilation cavity penetrating the anti-overflow device is provided in the anti-overflow device, a first opening of the ventilation cavity is located on the bottom surface of the anti-overflow device and is connected to the corresponding exhaust holes, a second opening of the ventilation cavity is located on the top surface of the anti-overflow device, the ventilation cavity is an inclined cavity whose air outlet direction is opposite to the forward direction of the material in the barrel, the inclined cavity is formed by the first cavity, the second cavity and the third cavity being connected end to end in sequence, the slope of the second cavity is smaller than the slopes of the first cavity and the third cavity, the first opening is located at the bottom of the first cavity, and the second opening is located at the top of the third cavity. The advantage of the present invention is that it can prevent material overflowing.

Description

Technical Field

[0001] The invention relates to a barrel, in particular to an exhaust type barrel capable of preventing overflow. Background Art

[0002] There is a Chinese utility model patent with application number CN201320594288.0 and the name of "A conical twin-screw extruder barrel" that discloses a conical twin-screw extruder barrel, including a barrel body with a screw cavity arranged inside, the screw cavity is a conical cavity, the barrel body includes three sections, namely a feeding section, an exhaust section and a metering section, the feeding section is provided with a circular feeding port, the exhaust section is provided with an exhaust hole, and the exhaust hole is a double exhaust hole. The conical twin-screw extruder barrel provided by the invention has a simple and reasonable structure, low manufacturing cost, good mixing and plasticizing effect, high product quality, high production efficiency, and long service life. However, when the barrel is exhausted, there is a hidden danger that some materials overflow from the exhaust hole, so the structure of the barrel needs to be further improved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a venting barrel which can prevent materials from overflowing from the vent hole when conveying materials, has a simple structure and is easy to manufacture, in view of the above-mentioned existing technical status.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a venting barrel capable of preventing overflow, comprising a barrel, a feed port is arranged at one end of the barrel, a discharge port is arranged at the other end of the barrel, a barrel recess is arranged in the middle of the barrel, and exhaust holes are arranged on the bottom surface of the barrel recess, and the exhaust holes are connected to the inner hole of the barrel, characterized in that: an anti-overflow device is detachably connected in the barrel recess, a ventilation cavity penetrating the anti-overflow device is arranged in the anti-overflow device, and the first opening of the ventilation cavity is located at the anti-overflow The bottom surface of the material device is connected with the corresponding exhaust hole, the second opening of the ventilation cavity is located on the top surface of the anti-overflow device, the ventilation cavity is an inclined cavity whose exhaust direction is opposite to the forward direction of the material in the barrel, the distance between the second opening and the feed port is smaller than the distance between the first opening and the feed port, the inclined cavity is formed by the first cavity, the second cavity and the third cavity being connected end to end in sequence, the slope of the second cavity is smaller than the slopes of the first cavity and the third cavity, the first opening is located at the bottom of the first cavity, and the second opening is located at the top of the third cavity.

[0005] As an improvement, a horizontal distance covered by a top projection of the upper side wall of the second cavity is greater than half of a horizontal width of the upper opening of the first cavity.

[0006] As a further improvement, the first cavity and the third cavity have the same slope.

[0007] As a further improvement, the inclination angle of the vertical section of the second cavity is 10-20°, and the inclination angles of the vertical section of the first cavity and the vertical section of the third cavity are both 45°.

[0008] As an improvement, the anti-overflow device is an integral structure composed of a first block, a second block and a third block, and there are two ventilation chambers. The first ventilation chamber is formed by the first recess on the side of the first block and the second recess on the second block, and the second ventilation chamber is formed by the third recess on the side of the second block and the fourth recess on the third block.

[0009] As a further improvement, connecting screw holes are distributed on the first block, the second block and the third block, and fixing screw holes corresponding to the connecting screw holes are distributed on the bottom surface of the cylinder recess around the exhaust hole, and the connecting screw holes are connected to the corresponding fixing screw holes by screws.

[0010] As a further improvement, limiting screw holes penetrating the overall structure are distributed on the side walls of the overall structure, and the assembled first block, second block and third block are fixed together by limiting screws or limiting bolts passing through the limiting screw holes.

[0011] As a further improvement, the horizontal cross-section of the ventilation cavity is circular, and the diameter of the first opening is the same as the diameter of the exhaust hole.

[0012] As an improvement, the barrel includes barrel section one, barrel section two and barrel section three, a first flange is arranged at the tail end of barrel section one, a second flange is arranged at the head end of barrel section two, a first notch is arranged at the top of the first flange, a second notch is arranged at the top of the second flange, the bottom surface of the first notch is flush with the bottom surface of the second notch, the barrel body recess is a recess formed by the first notch and the second notch, and the exhaust hole is formed by the first side wall recess on the first flange and the second side wall recess on the second flange.

[0013] According to a further improvement, the barrel is a conical double barrel.

[0014] Compared with the prior art, the advantages of the present invention are: the anti-overflow device plays a certain buffering role, prolonging the residence time of the material overflowing from the exhaust hole in the anti-overflow device, so that the overflowed material can flow back into the barrel due to its own gravity when the pressure in the barrel is weakened, while ensuring the exhaust of the barrel, reducing the overflow of the barrel; the inclination direction of the ventilation cavity of the anti-overflow device is opposite to the forward direction of the barrel material, so the upward overflow of the material can be reduced, and at the same time, the ventilation cavity is composed of three sections of cavities with changing slopes, which can prolong the flow time of the material, and play a certain capping effect on the material through the side wall of the middle section of the cavity, reducing the probability of the material continuing to overflow upward. In summary, this barrel realizes the function of preventing the material from overflowing from the exhaust hole when conveying the material by adding the anti-overflow device, and the structure is simple and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of an embodiment of the present invention;

[0016] Figure 2 for Figure 1 The structural breakdown diagram of

[0017] Figure 3 yes Figure 2 A top view of the middle anti-overflow device;

[0018] Figure 4 yes Figure 3 Sectional view along line AA;

[0019] Figure 5 yes Figure 2 Further structural decomposition diagram of ;

[0020] Figure 6 yes Figure 1 Front projection of the rear end surface of the middle barrel section. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings.

[0022] like Figures 1 to 6 As shown, the venting barrel capable of preventing overflow of the present embodiment comprises a barrel 1, a feed port is arranged at one end of the barrel 1, a discharge port is arranged at the other end of the barrel 1, a barrel recess 11 is arranged in the middle of the barrel 1, exhaust holes 12 are arranged on the bottom surface of the barrel recess 11, the exhaust holes 12 are connected with the barrel inner hole 13, an anti-overflow device 2 is detachably connected in the barrel recess 11, a ventilation cavity penetrating the anti-overflow device 2 is arranged in the anti-overflow device 2, and a first opening 211 of the ventilation cavity is located on the bottom surface of the anti-overflow device 2 and is connected with the corresponding exhaust hole 1 2, the second opening 231 of the ventilation cavity is located on the top surface of the overflow prevention device 2, the ventilation cavity is an inclined cavity whose gas outlet direction is opposite to the forward direction of the material in the barrel 1, the distance between the second opening 231 and the feed port is smaller than the distance between the first opening 211 and the feed port, the inclined cavity is formed by the first cavity 21, the second cavity 22 and the third cavity 23 being connected end to end in sequence, the slope of the second cavity 22 is smaller than the slopes of the first cavity 21 and the third cavity 23, the first opening 211 is located at the bottom of the first cavity 21, and the second opening 231 is located at the top of the third cavity 23. The horizontal distance L covered by the top projection of the upper side wall of the second cavity 22 is greater than half of the horizontal width S of the upper opening of the first cavity 21. The first cavity 21 and the third cavity 23 have the same slope. The inclination angle b of the vertical section of the second cavity is 10-20°, and the inclination angle a of the vertical section of the first cavity and the inclination angle c of the vertical section of the third cavity are both 45°.

[0023] The anti-overflow device 2 is an integral structure composed of a first block 201, a second block 202 and a third block 203. There are two ventilation cavities. The first ventilation cavity is formed by the first concave portion on the side of the first block 201 and the second concave portion on the second block 202, and the second ventilation cavity is formed by the third concave portion on the side of the second block 202 and the fourth concave portion on the third block 203. Connecting screw holes 204 are distributed on the first block 201, the second block 202 and the third block 203. Fixing screw holes corresponding to the connecting screw holes 204 are distributed on the bottom surface of the cylinder concave portion 11 around the exhaust hole 12. The connecting screw holes 204 are connected to the corresponding fixing screw holes by screws. Limiting screw holes 205 that penetrate the overall structure are distributed on the side wall of the overall structure. The first block 201, the second block 202 and the third block 203 after being assembled are fixed together by limiting screws or limiting bolts passing through the limiting screw holes 205. The horizontal cross section of the ventilation cavity is circular, and the diameter of the first opening 211 is the same as the diameter of the exhaust hole 12 .

[0024] The barrel 1 includes a barrel section 101, a barrel section 2 102 and a barrel section 3 103. A first flange is provided at the tail end of the barrel section 101, a second flange is provided at the head end of the barrel section 2 102, a first notch is provided at the top of the first flange, a second notch is provided at the top of the second flange, the bottom surface of the first notch is flush with the bottom surface of the second notch, the barrel body recess 11 is a recess formed by the first notch and the second notch, and the exhaust hole 12 is formed by the first side wall recess on the first flange and the second side wall recess on the second flange. The barrel 1 is a conical double barrel.

[0025] The barrel specifications are D60~D150, material: 38CrMoAl, the surface hardness of the barrel inner hole is HV900~HV1000. The straightness of the barrel inner hole is 0.03~0.05. The production capacity is increased by 10% compared with similar barrels.

[0026] This barrel has the following notable features: ordinary extruder barrels have problems such as the need to dry plastics before extruding products, low output, and poor plasticizing effect. Ordinary exhaust barrels have the risk of plastics overflowing from the exhaust port. The anti-overflow exhaust barrel does not need to dry plastics. The special exhaust structure design ensures that plastics will not overflow from the exhaust port. The production capacity can be increased by about 10% compared with similar barrels. Plastics do not need to be dried, the plasticizing efficiency is high, and plastics will not overflow from the exhaust port. It can improve production efficiency and save costs for customers, and has a good market prospect.

[0027] Working principle: A wear-resistant sleeve can be installed on the inner hole 13 of the barrel. The specific structure of the barrel and the wear-resistant sleeve belongs to the prior art, so it will not be repeated. The innovation of the present invention is that an anti-overflow device is added to the existing exhaust-type barrel. The ventilation cavity of the device is opposite to the forward direction of the material in the barrel, so the upward flow of the material can be reduced. At the same time, since the slope of the middle section of the ventilation cavity is smaller than the slope of the first section and the tail section, the top side wall of the middle section plays a certain pressure cover role, which can make the material overflowing upward along the inner wall of the ventilation cavity automatically flow back to the inner hole of the barrel due to gravity. At the same time, the change in the slope of the cavity can prolong the residence time of the overflowing material in the anti-overflow device, play a certain buffering role, and also prevent the material from overflowing the barrel from the second opening.

Claims

1. A venting barrel capable of preventing overflow, comprising a barrel (1), a feed port being arranged at one end of the barrel (1), a discharge port being arranged at the other end of the barrel (1), a barrel recess (11) being arranged in the middle of the barrel (1), vent holes (12) being arranged on the bottom surface of the barrel recess (11), the vent holes (12) being connected to an inner hole (13) of the barrel, characterized in that: An anti-overflow device (2) is detachably connected to the concave portion (11) of the barrel, a ventilation cavity penetrating the anti-overflow device (2) is provided in the anti-overflow device (2), a first opening (211) of the ventilation cavity is located on the bottom surface of the anti-overflow device (2) and is connected to the corresponding exhaust hole (12), a second opening (231) of the ventilation cavity is located on the top surface of the anti-overflow device (2), the ventilation cavity is an inclined cavity whose exhaust direction is opposite to the forward direction of the material in the barrel (1), the spacing between the second opening (231) and the feed port is smaller than the spacing between the first opening (211) and the feed port, and the inclined cavity is formed by the first cavity The first cavity (21), the second cavity (22) and the third cavity (23) are connected end to end in sequence, the slope of the second cavity (22) is smaller than the slopes of the first cavity (21) and the third cavity (23), the first opening (211) is located at the bottom of the first cavity (21), and the second opening (231) is located at the top of the third cavity (23); the horizontal distance (L) covered by the top projection of the upper side wall of the second cavity (22) is greater than half of the horizontal width (S) of the upper opening of the first cavity (21); the first cavity (21) and the third cavity (23) have the same slope; the inclination angle (b) of the vertical section of the second cavity is 10 to The first cavity has a vertical section angle (a) of 20° and the third cavity has a vertical section angle (c) of 45°. The anti-overflow device (2) is an integral structure composed of a first block (201), a second block (202) and a third block (203). There are two ventilation chambers. The first ventilation chamber is formed by the first concave portion of the side of the first block (201) and the second concave portion of the second block (202). The second ventilation chamber is formed by the third concave portion of the side of the second block (202) and the fourth concave portion of the third block (203). The side wall of the integral structure is provided with limiting screw holes (205) penetrating the integral structure. The first block (201), the second block (202) and the third block (203) after being assembled are fixed together by limiting screws or limiting bolts passing through the limiting screw holes (205). The barrel (1) is a conical double barrel.

2. The exhaust barrel according to claim 1, characterized in that: Connecting screw holes (204) are distributed on the first block (201), the second block (202) and the third block (203), and fixing screw holes corresponding to the connecting screw holes (204) are distributed on the bottom surface of the cylindrical recess (11) around the exhaust hole (12), and the connecting screw holes (204) are connected to the corresponding fixing screw holes by screws.

3. The exhaust barrel according to claim 2, characterized in that: The horizontal cross-section of the ventilation cavity is circular, and the diameter of the first opening (211) is the same as the diameter of the exhaust hole (12).

4. The exhaust barrel according to any one of claims 1 to 3, characterized in that: The barrel (1) comprises a barrel section (101), a barrel section (102) and a barrel section (103); a first flange is arranged at the rear end of the barrel section (101), a second flange is arranged at the head end of the barrel section (102); a first notch is arranged at the top of the first flange, a second notch is arranged at the top of the second flange, the bottom surface of the first notch is flush with the bottom surface of the second notch; the barrel body recess (11) is a recess formed by the first notch and the second notch being matched; and the exhaust hole (12) is formed by the first side wall recess on the first flange and the second side wall recess on the second flange being matched.

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