Pre-pressing spiral feeding device

Abstract

The utility model particularly relates to a prepressing spiral feeding device which solves the problems that when an existing conveying pump conveys high-concentration and high-viscosity materials, feeding is difficult, conveying is not smooth, and conveying efficiency is low. The utility model discloses a prepressing spiral feeding device which comprises a driving device, a stock bin and a spiral set arranged in the stock bin. The stock bin comprises an open section and a closed section; a feeding hole is formed in the top of the open section; a discharge hole is formed in the bottom of the closed section; the spiral group comprises a first spiral shaft and a second spiral shaft; one end of the first spiral shaft and one end of the second spiral shaft are rotationally connected with the stock bin respectively; the other end of the first spiral shaft and the other end of the second spiral shaft are respectively connected with an output shaft of the driving device; the screw pitch of the first screw shaft and the screw pitch of the second screw shaft are used for conveying materials; the material conveying device is suitable for high-concentration and low-fluidity materials, solves the problem of unsmooth material conveying, and improves the material conveying efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pre-pressing screw feeding device. BACKGROUND

[0002] In the conveying pump conveying system of high concentration and viscous material, the conveying pump often faces the problem of difficult feeding due to high medium concentration and high viscosity, which greatly restricts the conveying efficiency of the conveying pump, and even causes the problem of difficult material conveying.

[0003] In order to ensure that the conveying pump can stably and efficiently convey the material, it is necessary to ensure that the feeding device upstream of the conveying pump has sufficient pressure when feeding. Only in this way can the feeding of the conveying pump always be kept full and sufficient. The currently available feeding devices are all normal pressure conveying materials, and they cannot effectively solve this problem. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problems of difficult feeding, poor conveying and low conveying efficiency of the existing conveying pump when conveying high concentration and high viscosity materials, and provides a pre-pressing screw feeding device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A pre-pressing screw feeding device, which is characterized by comprising a driving device, a bin, and a screw group arranged inside the bin;

[0007] The bin comprises an open section and a closed section; the open section is provided with a feeding port at the top; the closed section is provided with a discharging port at the bottom;

[0008] The screw group comprises a first screw shaft and a second screw shaft; one end of the first screw shaft and one end of the second screw shaft are respectively rotatably connected with the inner side wall of the bin; the other end of the first screw shaft and the other end of the second screw shaft are respectively connected with the output shaft of the driving device; the pitch of the first screw shaft and the pitch of the second screw shaft gradually increase from one end to the other end, or the part close to one end gradually increases, and the part close to the other end is equal, and the increased size and regularity of the two are the same, so as to realize the conveying of the material.

[0009] Further, the pitch of the part corresponding to the open section of the first screw shaft and the second screw shaft gradually increases, which is used for realizing the step-by-step compression and pre-pressing of the material; the pitch of the part corresponding to the closed section of the first screw shaft and the second screw shaft is equal, which is used for realizing the smooth falling and conveying of the material.

[0010] Further, the driving device comprises a driving motor, a speed reducer and a gear transmission device, the gear transmission device comprises a first output shaft sleeved with a driving gear and a second output shaft sleeved with a driven gear;

[0011] The output shaft of the driving motor is connected with one end of the first output shaft through the speed reducer, and the other end of the first output shaft is connected with the other end of the first spiral shaft.

[0012] The other end of the second spiral shaft is connected with the second output shaft, and the driven gear on the second output shaft is engaged with the driving gear to realize the common rotation of the first spiral shaft and the second spiral shaft.

[0013] Further, in order to monitor the discharging state in real time and ensure the stable operation of the equipment, a position sensor is arranged on the closed section.

[0014] Further, a slag holding chamber is arranged in the closed section, which is used for collecting and storing the generated impurities to ensure the smoothness of the discharge port; a sealing door is arranged on the outside of the slag holding chamber and is used for cleaning; and a slag removal net is arranged in the slag holding chamber and corresponds to the position of the discharge port, which is used for isolating the impurities.

[0015] Further, the pitch of the first spiral shaft and the pitch of the second spiral shaft gradually and uniformly increase in the part corresponding to the open section, and the helical blades are arranged in an interlaced and staggered manner.

[0016] Further, in order to further improve the passing property and pre-pressing effect of the material, through holes are arranged on the helical blades of the first spiral shaft and the helical blades of the second spiral shaft, and tooth-shaped notches are arranged on the edges of the helical blades.

[0017] Further, the transmission ratio of the driving gear and the driven gear is 1:1.

[0018] Further, in order to facilitate daily maintenance and observation, an observation window is arranged on the top of the closed section.

[0019] Further, the slag removal net is grate-shaped, and the position sensor is a pressure sensor or a material level sensor.

[0020] The beneficial effects of the utility model are as follows:

[0021] 1. The pre-pressing spiral feeding device is suitable for high-concentration and low-flowability materials, solves the problem of poor material conveying, and improves the material conveying efficiency.

[0022] 2. The pre-pressing spiral feeding device is suitable for high-concentration and low-flowability materials, solves the problem of poor material conveying, and improves the material conveying efficiency.

[0023] 3、The pre-pressing screw feeding device, the pitch of the first screw shaft and the second screw shaft gradually increases, realizing gradual compression and pre-pressing of the material; the pitch of the first screw shaft and the second screw shaft is equal, realizing smooth falling and conveying of the material. The spiral blade of the first screw shaft and the spiral blade of the second screw shaft are provided with through holes, and the edges of the spiral blades are provided with tooth-shaped notches, further improving the passability and pre-pressing effect of the material.

[0024] 4、The pre-pressing screw feeding device, the position sensor can monitor the discharging state in real time, ensuring stable operation of the equipment.

[0025] 5、The pre-pressing screw feeding device is provided with a slag holding chamber which can collect and store generated impurities, so as to ensure smooth discharge of the discharge port; the airtight door can conveniently open the slag holding chamber for cleaning; the slag removal net can better isolate impurities, ensuring that impurities cannot enter the discharge port.

[0026] 6、The pre-pressing screw feeding device, the transmission ratio of the driving gear and the driven gear is 1:1, realizing the same rotating speed of the two screw shafts, and ensuring that the material is uniformly extruded and conveyed to the discharge port. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 is a structure schematic view of an embodiment of the pre-pressing screw feeding device of the utility model;

[0028] Fig. 2 is a top view of an embodiment of the pre-pressing screw feeding device of the utility model.

[0029] MARKING OF THE DRAWINGS:

[0030] 1 - material bin, 21 - first screw shaft, 22 - second screw shaft, 3 - driving device, 4 - discharge port, 5 - slag holding chamber, 6 - observation window, 7 - position sensor, 8 - feeding port. DETAILED DESCRIPTION

[0031] As Figs. 1-2As shown, a pre-pressing screw feeding device includes a driving device 3, a bin 1, and a screw group arranged inside the bin 1; the bin 1 includes an open section and a closed section; the open section is provided with a feeding port 8 at the top; the closed section is provided with a discharging port 4 at the bottom; the screw group includes a first screw shaft 21 and a second screw shaft 22; one end of the first screw shaft 21 and one end of the second screw shaft 22 are rotatably connected with the inner side wall of the bin 1 respectively; the other end of the first screw shaft 21 and the other end of the second screw shaft 22 are connected with the output shaft of the driving device 3 respectively; the pitch of the screw blades on the first screw shaft 21 and the pitch of the screw blades on the second screw shaft 22 gradually increase from one end to the other end, or the part close to one end gradually increases, and the part close to the other end is equal, and the increased size and regularity of the two are the same, so as to realize the conveying of the material.

[0032] Preferably, the pitch of the corresponding part of the first screw shaft 21 and the second screw shaft 22 with the open section gradually increases, so as to promote the gradual compression and pre-pressing of the material; the pitch of the corresponding part of the first screw shaft 21 and the second screw shaft 22 with the closed section is equal, so as to realize the smooth falling and conveying of the material.

[0033] In order to drive the first screw shaft and the second screw shaft to rotate and keep a certain rotating relationship, a set of driving device is adopted, wherein the driving device 3 includes a driving motor, a speed reducer, and a gear transmission device; the gear transmission device includes a first output shaft sleeved with a driving gear and a second output shaft sleeved with a driven gear; the output shaft of the driving motor is connected with one end of the first output shaft through the speed reducer, and the other end of the first output shaft is connected with the other end of the first screw shaft 21; the other end of the second screw shaft 22 is connected with the second output shaft, and the driven gear on the second output shaft is engaged with the driving gear for realizing the common rotation of the first screw shaft 21 and the second screw shaft 22.

[0034] The other end of the first screw shaft 21 is connected with the output shaft of the driving device 3, and the other end of the first screw shaft 21 is sleeved with a driving gear; the other end of the second screw shaft 22 is sleeved with a driven gear engaged with the driving gear, and the driving gear is engaged with the driven gear for realizing the common rotation of the first screw shaft 21 and the second screw shaft 22; preferably, the transmission ratio of the driving gear and the driven gear is 1:1, which can realize the uniform extrusion and transmission of the material. The pitch of the corresponding part of the first screw shaft 21 and the second screw shaft 22 with the open section gradually and uniformly increases, and the screw blades are arranged in an interlaced and staggered manner, which avoids the problem of uneven stress and deflection of the material. The screw blades of the first screw shaft 21 and the screw blades of the second screw shaft 22 are provided with through holes, and the edges of the screw blades are provided with tooth-shaped notches, which are used for improving the passability and pre-pressing effect of the material.

[0035] In this embodiment, the closed section is provided with a position sensor 7, which is a pressure sensor or a material level sensor, for real-time monitoring of the discharging state to ensure stable operation of the equipment. The inside of the closed section is provided with a slag holding chamber 5 for collecting and storing the generated impurities to ensure the smoothness of the discharge port 4; the outside of the slag holding chamber 5 is provided with airtight doors which can be easily opened for cleaning; the inside of the slag holding chamber 5 is provided with a slag removal net corresponding to the discharge port 4, which is grate-shaped, isolated by the grate-shaped slag removal net, and ensures that the impurities will not enter the discharge port 4. The top of the closed section is provided with an observation window 6 for daily maintenance and observation. The driving device 3 can be a motor reducer or a hydraulic motor to adapt to different working environments and needs.

[0036] The working process of the pre-pressing screw feeding device is as follows:

[0037] The screw groups installed inside the silo 1 have a certain rotational relationship, ensuring that they can work cooperatively. The material is gradually compressed and pre-pressed from the feed inlet 8 to the closed section because the pitch of each screw shaft gradually increases. When reaching the sealing section, the pitch of each screw shaft becomes equal, allowing the material to smoothly fall and be conveyed to the discharge port 4.

Claims

1. A pre-compressed screw feeder, characterized in that: Includes a drive unit (3), a hopper (1), and a screw assembly installed inside the hopper (1); The hopper (1) includes an open section and a closed section; the top of the open section is provided with a feed inlet (8); the bottom of the closed section is provided with a discharge outlet (4); The spiral assembly includes a first spiral shaft (21) and a second spiral shaft (22); one end of the first spiral shaft (21) and one end of the second spiral shaft (22) are rotatably connected to the inner wall of the hopper (1); the other end of the first spiral shaft (21) and the other end of the second spiral shaft (22) are connected to the output shaft of the drive device (3); the pitch of the first spiral shaft (21) and the pitch of the second spiral shaft (22) gradually increase from one end to the other end, or the portion near one end gradually increases while the portion near the other end is equal, and the increase in size and pattern of both is the same, so as to realize the conveying of materials.

2. The pre-compression screw feeder according to claim 1, characterized in that: The pitch of the first spiral shaft (21) and the second spiral shaft (22) corresponding to the open section gradually increases, which is used to realize the gradual compression and pre-compression of the material; The pitch of the first spiral shaft (21) and the second spiral shaft (22) corresponding to the closed section is equal, which is used to realize the smooth falling and conveying of materials.

3. The pre-compression screw feeder according to claim 2, characterized in that: The drive device (3) includes a drive motor, a reducer and a gear transmission device, wherein the gear transmission device includes a first output shaft with a drive gear and a second output shaft with a driven gear. The output shaft of the drive motor is connected to one end of the first output shaft via a reducer, and the other end of the first output shaft is connected to the other end of the first helical shaft (21). The other end of the second spiral shaft (22) is connected to the second output shaft. The driven gear on the second output shaft meshes with the driving gear to enable the first spiral shaft (21) and the second spiral shaft (22) to rotate together.

4. The pre-compression screw feeder according to claim 3, characterized in that: A position sensor (7) is installed on the closed section to monitor the discharge status in real time.

5. The pre-compression screw feeder according to claim 4, characterized in that: The enclosed section is equipped with a slag chamber (5) to collect and store the generated impurities, so as to ensure that the discharge port (4) is unobstructed; The outer side of the slag chamber (5) is equipped with a sealed door for cleaning; A slag removal screen is installed inside the slag chamber (5) at a position corresponding to the discharge port (4) to isolate impurities.

6. The pre-compression screw feeder according to claim 5, characterized in that: The pitch of the first helical shaft (21) and the second helical shaft (22) corresponding to the open section gradually increases uniformly, and their helical blades are arranged alternately and staggered.

7. A pre-compression screw feeder according to any one of claims 1 to 6, characterized in that: Both the spiral blades of the first spiral shaft (21) and the spiral blades of the second spiral shaft (22) are provided with through holes, and the edges of the spiral blades are provided with toothed notches to improve the material flow and pre-compression effect.

8. The pre-compression screw feeder according to claim 3, characterized in that: The transmission ratio between the driving gear and the driven gear is 1:

1.

9. The pre-compression screw feeder according to claim 4, characterized in that: An observation window (6) is provided at the top of the closed section for daily maintenance and observation.

10. The pre-compression screw feeder according to claim 5, characterized in that: The slag removal mesh is grate-shaped; The position sensor (7) is a pressure sensor or a material level sensor.

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