A steam backflow prevention feeder

Abstract

The present application belongs to the technical field of feed production equipment, and particularly relates to a feeding device capable of preventing steam backflow. The present application comprises: a conveying pipe, a spiral shaft arranged in the conveying pipe; a discharging cavity arranged at the rear end of the conveying pipe and in communication with the conveying pipe; the spiral shaft comprises: a shaft body, the rear end of the shaft body extending into the discharging cavity, and the rear end of the shaft body being provided with an air outlet vane assembly; a spiral blade assembly arranged on the shaft body, the spiral blade assembly comprising a first spiral blade and a second spiral blade, the first spiral blade extending from the front end of the conveying pipe to the inner side wall of the discharging cavity, the second spiral blade extending from the inner side wall of the discharging cavity to the front end of the conveying pipe, and the second spiral blade being arranged in a staggered manner with the first spiral blade; a steam discharge device arranged above the discharging cavity, and a discharging port arranged below the discharging cavity. The present application is used to solve the technical problem that the feeding device in the prior art cannot prevent steam backflow, which causes steam to enter the feeding device or the material bin, and causes the material to be hardened or deteriorated.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of feed production equipment, and particularly relates to a feeding device capable of preventing steam backflow. BACKGROUND

[0002] In the prior art, a steam generating device, such as a dryer, an expander, a granulator, etc., is connected to the rear end of the feeding device. The rear end device is often connected to steam during daily production. Therefore, during the feeding process, steam is easily backflowed into the feeding device, thereby causing the material in the feeding device to be bonded or caked, forming pot-bread material (commonly known as material caking), which not only affects uniform discharging, but also increases the resistance of the screw shaft to rotate, causing the current of the driving motor system at the rear end of the screw shaft to abnormally fluctuate, resulting in monitoring alarm. In severe cases, after a period of use, the accumulated material directly blocks the feeding device, or steam enters the material bin from the feeding device, causing the material in the bin to arch, making the material difficult to discharge, and there is a risk of material deterioration. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and to provide a feeding device capable of preventing steam backflow, which solves the technical problem that the feeding device in the prior art cannot prevent steam backflow, causing steam to enter the feeding device or the material bin, and causing material caking or material deterioration.

[0004] The technical solution of the present application to solve the above technical problem is as follows: a feeding device capable of preventing steam backflow, comprising:

[0005] A conveying pipe is provided with a screw shaft.

[0006] A discharging cavity is arranged at the rear end of the conveying pipe and is in communication with the conveying pipe.

[0007] The screw shaft comprises:

[0008] A shaft body, the rear end of the shaft body extends into the discharging cavity, and the rear end of the shaft body is provided with an air outlet blade assembly.

[0009] A spiral blade assembly is arranged on the shaft body, the spiral blade assembly comprises a first spiral blade and a second spiral blade, the first spiral blade extends from the front end of the conveying pipe to the inner side wall of the discharging cavity, the second spiral blade extends from the inner side wall of the discharging cavity to the front end of the conveying pipe, and the second spiral blade is arranged in a staggered manner with the first spiral blade.

[0010] A steam discharge device is arranged above the discharging cavity, and a discharging port is arranged below the discharging cavity.

[0011] The present application is to avoid steam backflow to the feeder, mainly provided with a spiral piece assembly and an exhaust blade assembly in the feeder; wherein the first spiral piece in the spiral piece assembly is used for conveying materials, and the second spiral piece can reduce the lead after being combined with the first spiral piece, can compact the materials about to reach the discharge chamber, reduce the steam flow gap, and cooperate with the exhaust blade assembly to guide the steam upward to the steam exhaust device; the combination of the two can effectively prevent the steam from backflowing into the feeder.

[0012] Further, a driving assembly is arranged at the front end of the conveying pipe, and the driving assembly comprises a motor fixedly connected to the front end of the spiral shaft through a shaft coupling.

[0013] The shaft body is a hollow pipe, both ends of the hollow pipe are provided with rotating shafts, and the rotating shafts at both ends are fixedly connected to the shaft couplings and movably connected to the bearing seats of the outer sidewalls of the discharge chambers.

[0014] The rotating shafts can be welded or screwed to the shaft body, or pin shaft holes corresponding to each other can be formed in the hollow pipe and the rotating shafts, and the pin shafts are connected.

[0015] The hollow shaft body can reduce the self-weight, and the matching motor power can be reduced, thereby achieving energy saving.

[0016] Further, the conveying pipe comprises an open section at the front end and a closed section at the rear end, and the upper portion of the open section is provided with a feeding port.

[0017] The feeding port is directly connected to the material bin to realize automatic feeding.

[0018] Further, the upper portion of the closed section is provided with a movable door, one side of the movable door is hingedly connected to the conveying pipe, and the other side of the movable door is fixed through a plurality of rotating locks.

[0019] The movable door is mainly used for daily maintenance and cleaning of the inside of the conveying pipe.

[0020] Further, the other side of the movable door is further provided with a safety lock, the safety lock comprises a limiting plate and a limiting switch, the limiting plate is arranged on the movable door, the limiting switch is arranged on the conveying pipe, and the limiting plate is used for abutting against the limiting switch when the movable door is closed.

[0021] The beneficial effect of the present step is that the limit switch is connected with the control system of the motor. When the movable bin door is closed, the limit switch provides a normally open / closed electrical signal, and the motor can normally start and stop. When the movable bin door is opened, the electrical signal of the limit switch changes, and the motor is in a state where it cannot start. In this way, the motor can be prevented from starting in the case of accidental touch, causing harm to the employee who is performing maintenance work on the opened movable bin door.

[0022] Further, the first spiral piece is a gradually changing lead.

[0023] The beneficial effect of the present step is that the lead of the first spiral piece gradually increases. The lead of the first spiral piece located in the open section is smaller, which is to quickly stir the material falling from the material bin when the spiral shaft rotates, so that the material falls from the top of the spiral shaft to the bottom of the spiral shaft and the advancing speed is accelerated, so that the gap between the spiral shaft and the material bin is maintained, and the falling speed of the material in the material bin is accelerated. The lead of the first spiral piece in the closed section is larger, so that the advancing speed of the material is slowed down, and the material is more likely to fill the conveying pipe.

[0024] Further, a scraping piece is provided between the first spiral piece and the second spiral piece, and the outer side of the scraping piece is flush with the outer edge of the first spiral piece and the second spiral piece.

[0025] The beneficial effect of the present step is that the scraping piece can scrape off the material attached to the wall of the conveying pipe, avoiding the material sticking to the pipe wall for a long time, which causes the material to deteriorate, and then the deteriorated material affects the product quality.

[0026] Further, the air exhaust blade assembly includes a plurality of blades and a baffle, and the baffle is arranged between the blades and the spiral piece assembly.

[0027] The plurality of blades are uniformly distributed in the radial direction of the shaft body, and the blades have an inclination angle.

[0028] The beneficial effect of the present step is that the blades guide the steam upward as the shaft body rotates, and the baffle can isolate the material to prevent the blades from being contaminated by the material.

[0029] Further, the baffle is two hollow semicircular plates, and a clamping sleeve is arranged at the inner circle of the hollow semicircular plate, and the clamping sleeve is matched with the shaft body.

[0030] The blade is connected with the clamping sleeve, the blade is connected with the baffle, or the blade is simultaneously connected with the clamping sleeve and the baffle.

[0031] The beneficial effect of the present step is that the blade is fixed on the baffle, and the baffle with a half structure is convenient to install and disassemble, and is easy to process.

[0032] Further, the steam discharging device comprises an exhaust pipe and a conical top cover, the top cover is suspended above the exhaust pipe;

[0033] The outer diameter of the top cover is larger than the diameter of the exhaust pipe;

[0034] The exhaust pipe is further provided with a water collecting cover below the pipe opening, the diameter of the water collecting cover is larger than the outer diameter of the top cover.

[0035] The beneficial effects of the present application are that the top cover can prevent sundries from falling into the material from the exhaust pipe, avoiding the pollution of the material, and the water collecting cover can collect the condensed water generated on the top cover, avoiding the condensed water from flowing everywhere.

[0036] The beneficial effects of the present application are:

[0037] 1. When the feeder is normally used, the material is conveyed to the rear-end equipment through the screw shaft, the screw shaft adopts a double helical blade structure to improve the material filling rate of the rear section of the conveying pipe, and the end of the screw shaft is further provided with a scraping blade, which can clean the material when sporadic material adhesion occurs on the inner wall, thereby ensuring the quality of the material.

[0038] 2. The discharge cavity is further provided with an exhaust blade assembly and a steam discharging device, when the steam of the rear-end equipment rises to the discharge cavity, the exhaust blade assembly guides the steam to rise to the steam discharging device, and the steam is discharged, avoiding the pollution of the material. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0040] Figure 1 A perspective view of a steam anti-backflow feeder is provided.

[0041] Figure 2 A sectional view of a steam anti-backflow feeder is provided.

[0042] Figure 3 A perspective view of a screw shaft in a steam anti-backflow feeder is provided.

[0043] Figure 4 A perspective view of an exhaust blade assembly in a steam anti-backflow feeder is provided.

[0044] REFERENCE NUMERALS:

[0045] 1-conveying pipe; 2-spiral shaft; 3-discharge cavity; 4-motor; 5-bearing seat; 6-exhaust vane assembly;

[0046] 11-open section; 12-closed section; 21-shaft body; 22-first spiral blade; 23-second spiral blade; 24-scraping blade; 31-discharge port; 32-steam exhaust device; 41-coupling; 61-baffle; 62-vane; 63-clamp sleeve;

[0047] 111-feeding port; 121-movable door; 122-rotary lock; 123-limiting plate; 124-limiting switch; 211-rotating shaft; 321-exhaust pipe; 322-top cover; 323-water collecting cover; 631-clamp. DETAILED DESCRIPTION

[0048] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0049] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meanings understood by the skilled in the art to which the present application belongs.

[0050] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0051] In addition, the terms "first", "second", and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0052] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connected", "connecting", "fixed", and the like, should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0054] Embodiments

[0055] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the steam anti-backflow feeding device provided by the present application comprises:

[0056] A conveying pipe 1, wherein a spiral shaft 2 is arranged in the conveying pipe 1;

[0057] A discharging cavity 3, wherein the discharging cavity 3 is arranged at the rear end of the conveying pipe 1 and communicates with the conveying pipe 1;

[0058] The spiral shaft 2 comprises:

[0059] A shaft body 21, wherein the rear end of the shaft body 21 extends into the discharging cavity 3, and the rear end of the shaft body 21 is provided with an air exhaust blade assembly 6, which rotates with the spiral shaft 2 to guide the steam upward;

[0060] A spiral blade assembly, wherein the spiral blade assembly is arranged on the shaft body 21, the spiral blade assembly comprises a first spiral blade 22 and a second spiral blade 23, the first spiral blade 22 extends from the front end of the conveying pipe 1 to the inner side wall of the discharging cavity 3, and the second spiral blade 23 extends from the inner side wall of the discharging cavity 3 to the front end of the conveying pipe 1, the second spiral blade 23 is arranged in a staggered manner with the first spiral blade 22, wherein the lead of the second spiral blade 23 is the same as or similar to the lead of the first spiral blade 22, and the length of the second spiral blade 23 is two to three times the lead;

[0061] The upper portion of the discharging cavity 3 is provided with a steam exhaust device 32 for exhausting steam, and the lower portion is provided with a discharging port 31 connected with a rear-end device.

[0062] In order to avoid the backflow of steam into the feeder, the feeder is mainly provided with a spiral blade assembly and an air exhaust blade assembly 6; wherein the first spiral blade 22 in the spiral blade assembly is used for conveying materials, and the second spiral blade 23 can reduce the lead after being combined with the first spiral blade 22, can compact the materials about to reach the discharging cavity 3, reduce the gap of steam flow, and then cooperate with the air exhaust blade assembly 6 to guide the steam upward to the steam exhaust device 32; the combination of the two can effectively prevent the backflow of steam into the feeder.

[0063] On the basis of the above technical solution, a driving assembly is further included, which is arranged at the front end of the conveying pipe 1, and the driving assembly includes a motor 4, the motor 4 is fixedly connected with the front end of the spiral shaft 2 through a shaft coupling 41, and the rotating speed of the motor 4 is generally reduced through a frequency converter or a speed reducer to match the actual conveying speed; the specific speed reduction mode is selected according to the type of the motor 4.

[0064] The shaft body 21 is a hollow pipe, both ends of the hollow pipe are provided with rotating shafts 211, the rotating shafts 211 at both ends are respectively fixedly connected with the shaft coupling 41 and movably connected with the bearing seat 5 of the outer side wall of the discharging cavity 3, and the same bearing seat 5 can be further arranged at the rear end of the shaft coupling 41 to enable the spiral shaft 2 to rotate more stably.

[0065] The rotating shaft 211 can be welded or screwed with the shaft body 21 (it should be noted that when the spiral shaft 2 is right-handed, in order to prevent the screwing from loosening, the thread of the screwing is left-handed thread), or a pin shaft hole corresponding to each other can be formed on the hollow pipe and the rotating shaft 211, and the pin shaft is connected.

[0066] The hollow shaft body 21 can reduce the self-weight, and the power of the matched motor 4 can be reduced, thereby achieving the effect of energy saving.

[0067] On the basis of the above technical solution, the conveying pipe 1 includes an open section 11 at the front end and a closed section 12 at the rear end, and the upper portion of the open section 11 is provided with a feeding port 111 connected with a material bin.

[0068] The feeding port 111 is directly connected with the material bin to realize automatic feeding, and the feeding port 111 is wide to facilitate the entry of materials.

[0069] On the basis of the above technical scheme, the upper side of the closed section 12 is provided with a movable door 121, one side of the movable door 121 is hinged to the conveying pipe 1, and the other side of the movable door 121 is fixed through a plurality of rotating buckles 122.

[0070] The movable door 121 is mainly used for daily maintenance and cleaning the inside of the conveying pipe 1.

[0071] On the basis of the above technical scheme, the other side of the movable door 121 is also provided with a safety lock, the safety lock comprises a limiting plate 123 and a limiting switch 124, the limiting plate 123 is arranged on the movable door 121, the limiting switch 124 is arranged on the conveying pipe 1, and the limiting plate 123 is used for abutting against the limiting switch 124 when the movable door 121 is closed.

[0072] The limiting switch 124 is connected with the control system of the motor 4, when the movable door 121 is closed, the limiting switch 124 provides a normally open / closed electrical signal, and the motor 4 can be normally started and stopped; when the movable door 121 is opened, the electrical signal of the limiting switch 124 changes, and the motor 4 is in a state of being unable to start; in this way, the motor 4 can be prevented from starting in a mistaken manner, and an employee working on the maintenance of the opened movable door 121 is prevented from being injured.

[0073] On the basis of the above technical scheme, the first spiral piece 22 is a gradually changing lead, and the lead of the first spiral piece 22 gradually increases in the direction from the front end to the rear end of the conveying pipe 1, if the lead of the front end of the first spiral piece 22 is L, then the lead of the rear end of the first spiral piece 22 is 3-5 times of L.

[0074] The lead of the first spiral piece 22 gradually increases, and the lead of the first spiral piece 22 located in the open section 11 is relatively small, which is used for quickly stirring the material falling from the material bin when the spiral shaft 2 rotates, so that the material falls into the lower side of the spiral shaft 2 from the upper side of the spiral shaft 2 and the advancing speed of the material is accelerated, so that the gap between the spiral shaft 2 and the material bin is kept, and the falling speed of the material in the material bin is accelerated; and the lead of the first spiral piece 22 in the closed section 12 is relatively large, so that the advancing speed of the material is slowed down, and the material is more likely to fill the conveying pipe 1.

[0075] On the basis of the above technical scheme, a scraping piece 24 is arranged between the first spiral piece 22 and the second spiral piece 23, and the outer side of the scraping piece 24 is flush with the outer edges of the first spiral piece 22 and the second spiral piece 23.

[0076] The scraping piece 24 can scrape the scattered material adhering to the wall of the conveying pipe 1, so that the material is not adhered to the wall for a long time, the material is not deteriorated, and then the deteriorated material is not mixed into the good material, and finally the product quality is not affected.

[0077] On the basis of the above technical solutions, the air exhaust vane assembly 6 comprises a plurality of vanes 62 and baffles 61, the baffles 61 are arranged between the vanes 62 and the spiral vane assembly;

[0078] The plurality of vanes 62 are evenly distributed in the radial direction of the shaft body 21, and the vanes 62 have an inclination angle, and are inclined in the rotation direction of the spiral shaft 2, and the angle is 30°-60°.

[0079] The vanes 62 are rotated with the shaft body 21, and steam is guided upward, and the baffles 61 can isolate materials to prevent the vanes 62 from being contaminated by the materials.

[0080] On the basis of the above technical solutions, the baffle 61 is a hollow semicircular plate, a clamping sleeve 63 is arranged at the inner circle of the hollow semicircular plate, and a clamping opening 631 of the clamping sleeve 63 is matched with the shaft body 21.

[0081] The vane 62 is connected with the clamping sleeve 63, the vane 62 is connected with the baffle 61, or the vane 62 is simultaneously connected with the clamping sleeve 63 and the baffle 61.

[0082] Firstly, a plurality of vanes 62 are fixed on the baffle 61 or the clamping sleeve 63 at intervals to form an integral whole, and the baffle 61 with a half structure is convenient to install and disassemble, and is easy to add tools; secondly, when the vane 62 with an inclination angle is connected with the baffle 61, a closed sector is formed, the pressure difference on both sides of the vane 62 is large, and the steam flow is better driven, and the drainage effect is better.

[0083] On the basis of the above technical solutions, the steam exhaust device 32 comprises an exhaust pipe 321 and a conical top cover 322, and the top cover 322 is suspended above the exhaust pipe 321.

[0084] The outer diameter of the top cover 322 is greater than the diameter of the exhaust pipe 321.

[0085] A water collecting cover 323 is further arranged below the pipe opening of the exhaust pipe 321, and the diameter of the water collecting cover 323 is greater than the outer diameter of the top cover 322.

[0086] The top cover 322 can prevent sundries from falling into the materials from the exhaust pipe 321, so as to avoid contaminating the materials, and the water collecting cover 323 can collect the condensed water generated on the top cover 322, so as to avoid the condensed water from flowing everywhere.

[0087] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A feeder for preventing steam backflow, characterized in that, include: The conveying pipe contains a spiral shaft; The discharge chamber is located at the rear end of the conveying pipe and is connected to the conveying pipe; The helical shaft includes: A shaft body, the rear end of which extends into the discharge chamber, and the rear end of the shaft body is provided with an exhaust blade assembly; A spiral blade assembly is disposed on the shaft body. The spiral blade assembly includes a first spiral blade and a second spiral blade. The first spiral blade extends from the front end of the conveying pipe to the inner wall of the discharge chamber, and the second spiral blade extends from the inner wall of the discharge chamber to the front end of the conveying pipe. The second spiral blade is offset from the first spiral blade. The discharge chamber is equipped with a steam exhaust device above and a discharge port below; The conveying pipe includes an open section at the front and a closed section at the rear, with a feeding port provided above the open section; The first spiral blade has a gradually changing lead; the lead of the first spiral blade located in the open section is L, and the lead of the first spiral blade located in the closed section is 3 to 5 times L. The exhaust blade assembly includes multiple blades and a baffle, wherein the baffle is disposed between the blades and the spiral blade assembly; The plurality of blades are evenly distributed in the radial direction of the shaft, and the blades have an inclination angle.

2. The feeder for preventing steam backflow according to claim 1, characterized in that, It also includes a drive assembly, which is located at the front end of the conveying pipe. The drive assembly includes a motor, which is fixedly connected to the front end of the screw shaft via a coupling. The shaft is a hollow tube, and the two ends of the hollow tube are provided with rotating shafts. The rotating shafts at both ends are fixedly connected to the coupling and movably connected to the bearing seats on the outer wall of the discharge chamber, respectively. The rotating shaft is welded or screwed to the shaft body, or corresponding pin holes are opened on the hollow tube and the rotating shaft for connection by pins.

3. The feeder for preventing steam backflow according to claim 1, characterized in that, A movable door is provided above the closed section. One side of the movable door is hinged to the conveying pipe, and the other side of the movable door is fixed by multiple rotary latches.

4. The feeder for preventing steam backflow according to claim 3, characterized in that, A safety lock is also provided on the other side of the movable compartment door. The safety lock includes a limit plate and a limit switch. The limit plate is located on the movable compartment door, and the limit switch is located on the conveying pipe. The limit plate is used to abut against the limit switch when the movable compartment door is closed.

5. The feeder for preventing steam backflow according to claim 1, characterized in that, A scraper is provided between the first spiral blade and the second spiral blade, and the outer side of the scraper is flush with the outer edge of the first spiral blade and the second spiral blade.

6. The feeder for preventing steam backflow according to claim 1, characterized in that, The baffle consists of two hollow semicircular plates, and a retainer is provided on the inner circle of the hollow semicircular plates. The retainer's slot is adapted to the shaft. The blade is connected to the sleeve, the blade is connected to the baffle, or the blade is connected to both the sleeve and the baffle simultaneously.

7. The feeder for preventing steam backflow according to claim 1, characterized in that, The steam exhaust device includes an exhaust pipe and a conical top cover, the top cover being suspended above the exhaust pipe; The outer diameter of the top cover is larger than the diameter of the exhaust pipe; A water collection hood is also provided below the outlet of the exhaust pipe, and the diameter of the water collection hood is larger than the outer edge diameter of the top cover.

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