WO2018196479A1 - Pneumatic conveying feeder and transfer pipe connecting structure - Google Patents

Abstract

Disclosed is a pneumatic conveying feeder, comprising a middle circular cylinder (2), an upper flange (1), a lower flange (4), an impeller (3) and a transmission device. By means of arranging at least two feed inlets (14) on the upper flange (1), making the number of feed outlets (41) the same as the number of feed inlets (14) and arranging the feed outlets (41) and the feed inlets (14) in a staggered manner, the invention realises an increase in space utilization rate of the device, so as to increase the feeding ability of a single device. By means of arranging a groove-shaped air distribution cavity (12) at the positions of a lower surface of the upper flange (4) corresponding to each feed outlet (41), the invention changes the blowing method, so as to increase the blowing ability and blowing concentration of a single device with the same diameter with regard to materials, and reduce operating costs of the device. Further disclosed is a transfer pipe connecting structure, which, by means of changing the connection relationship between transfer pipelines, while ensuring the flow precision for blowing materials, can not only realise a feeder blowing a reactor in a traditional manner, but can also realise a feeder blowing two reactors, thereby saving on costs for a user.

Description

Pneumatic conveying feeder and conveying pipe connecting structure Technical field

The invention belongs to the field of bulk material pneumatic conveying equipment, and particularly relates to a pneumatic conveying feeder and a conveying pipe connecting structure.

Background technique

In the metallurgical and other industries, the pneumatic conveying of bulk materials has high requirements on conveying capacity and conveying precision. Usually, it is transported by a vertical rotary feeder, which can achieve higher conveying precision than the ordinary fluidized pressing method. The Chinese patents that are commonly used in vertical feeders currently used in engineering are: 201220205422.9, 201020619756.1, 201220673793.X, 201320480948.2, 201620306364.7, 201620622572.8. From the published information, the feeding and discharging of a single feeder Each port is one, and adopts a 180° phase-displacement arrangement to form a single-channel material conveying mode in the feeder. The main disadvantages are: the space utilization rate of the single-channel structure is low, and the equipment feeding capacity is insufficient. The investment cost is relatively high; in order to improve the single-outlet discharging capacity, the outlet opening is large, resulting in a large waste of blowing gas, and the user operating cost is high; the single-channel structure inlet and outlet are 180° different, causing the injection tank to be blanked. Eccentricity, unable to form a stable overall unloading; uneven layout of the blowing port also caused a certain amount of gas consumption. Since a single-channel structure can only be blown corresponding to one reactor, at least one feeder is required for one reactor, and it is often necessary to configure multiple feeders for one reactor to achieve the blowing capability.

Published patents 201320485328.8 and 201310346847.0 show that there are multiple inlets and outlets, but the shape of the inlet and outlet and the form of the blade or the material in the feeder are larger than those of the conventional vertical rotary feeder. Differently, its solution is mainly to solve the accuracy problem of the traditional fluidized pressurization method. Due to the shape of the inlet and outlet, the shape of the blade, and the setting of the conveying mode, compared with the ordinary vertical feeder, the equipment capacity and equipment space The utilization rate has not been improved, and the supporting blowing and conveying method described above is relatively simple.

The disclosed patent 201210217828.3 is a two-channel star feeder, which is quite different from the traditional vertical rotary feeder in and out of the form and working mode. It is mainly in the form of a horizontal star valve, and the public information shows that Inherent characteristics, this form is less used in applications where accuracy is required.

Summary of the invention

In view of the above, an object of the present invention is to provide a pneumatic conveying feeder with high conveying precision, high conveying density, compact and efficient structure, and flexible and convenient control. The invention also provides a conveying pipe connecting structure suitable for a pneumatic conveying feeder, which can be adapted to various working conditions by improving the piping mode.

In order to achieve the above object, the present invention provides the following technical solution: a pneumatic conveying feeder comprising an intermediate cylinder, an upper flange and a lower flange correspondingly disposed at two ends of the intermediate cylinder, an impeller disposed in the intermediate cylinder, and a sealing bearing seat disposed under the lower flange; the upper flange and the lower flange are correspondingly provided with a feeding port and a discharging port, and the discharging port is correspondingly connected with a discharging pipe, the impeller and the through-sealing The rotating shaft of the bearing seat is connected and driven to rotate by a transmission connected to the other end of the rotating shaft; the feeding port has at least two, evenly spaced around the circumferential direction of the flange, the number of the discharging port and the feeding port The same and the discharge port and the feed port are staggered; the lower surface of the upper flange is provided with a grooved cloth air chamber at a position corresponding to each discharge port, and the air groove of the grooved cloth is arranged at the side of the upper flange The air inlet holes communicated with each other, and the cross-sectional shape of the groove-shaped air chamber is the same as the shape of the discharge port.

Further, an orifice plate is arranged below the grooved air chamber, and the orifice plate is arranged with a plurality of gas jet holes.

Further, the feed port has two inlets disposed on the upper flange at an angle of 180°; the discharge port has two, and the projection angle between the two adjacent feed ports and the discharge port is 90°. .

Further, the two feed ports are fan-shaped holes of the same size, and the feed port is provided with a rectangular strip-shaped strip, and the strip-shaped plate center line does not pass through the center of rotation of the impeller.

Further, the transmission device comprises a transmission reducer connected to the rotating shaft, and a variable frequency motor connected to the transmission reducer; the lower part of the sealed bearing seat is provided with a cavity, and the circumferential direction of the sealed bearing seat corresponding to the cavity A detecting element is arranged on the side wall, and an induction plate is arranged on the rotating shaft in the cavity.

Further, a hard alloy layer is fixed by surfacing on the portion of the feeder that is easily worn by the material.

Further, the intermediate cylinder is provided with a pressure equalizing exhaust pipe, and the equalizing exhaust pipe correspondingly flows through the channel side of the discharge port; the pressure equalizing exhaust pipe is connected with the spray can A check valve is provided on the pipeline.

Further, an arched guiding surface is disposed on the upper surface of the upper flange.

Further, the cross-sectional area of the cavity formed between the impeller blades is decreased from top to bottom.

The invention also discloses a conveying pipe connecting structure suitable for the pneumatic conveying feeder as described above, which comprises a conveying pipe which is connected with the discharging pipe and the reactor in one-to-one correspondence, and a gas source is connected to the front end of each conveying pipe; any conveying pipe The pipes are respectively connected with the remaining conveying pipes through the branch pipes, and the material cutting valves are arranged on each conveying pipe and each branch pipe, and the material shut-off valve disposed on each conveying pipe is located between the branch pipe outlet and the inlet of the conveying pipe.

The utility model has the beneficial effects that the feeder has at least two feeding ports and a discharging port, and forms a multi-channel material conveying structure with the rotating impeller, thereby improving the space utilization of the device under the premise of ensuring the feeding precision. The rate, thereby increasing the feeding capacity of a single device, in order to increase the feed filling rate of the inlet, the operating speed of the impeller can be appropriately reduced, thereby making the operation of the device more reliable. The feeding port is provided with a strip plate and a round table-shaped impeller hub, so that the material is thoroughly mixed and filled with the material of the impeller cavity at the feeding port to prevent bridging. The air blown orifice plate is used to effectively increase the blowing efficiency and the blowing concentration, which saves the gas consumption for the injection and saves the operation cost for the user. The speed detecting component is arranged in the cavity position of the sealed bearing housing to facilitate sealing, which can effectively prevent signal interference and improve the control precision of the device. The wear-resistant position is fixed with cemented carbide by surfacing, which improves the service life and stability of the equipment. The connection structure of the conveying pipe suitable for the feeder has various communication forms, which provides a more economical and flexible configuration mode for the feeding of the multi-reactor, and saves the investment cost for the user.

DRAWINGS

In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for explanation:

Figure 1 is a schematic view of the overall arrangement of the present invention;

Figure 2 is a schematic view showing the transportation process of materials inside the feeder;

Figure 3 is a cross-sectional view showing the internal structure of the feeder;

Figure 4 is a top plan view of the feeder.

detailed description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in the figure, the pneumatic conveying feeder of the present invention comprises an intermediate cylinder 2, an upper flange 1 and a lower flange 4 correspondingly disposed at both ends of the intermediate cylinder 2, and an impeller 3 disposed in the intermediate cylinder 2. And a sealing bearing seat 5 disposed under the lower flange 4; the upper flange 1 and the lower flange 4 are correspondingly provided with a feeding port 14 and a discharging port 41, and the discharging port 41 is correspondingly connected with a discharging material a tube 42, the impeller 3 is connected to a rotating shaft 51 passing through the sealed bearing housing 5, and is driven to rotate by a transmission connected to the other end of the rotating shaft 51; at least two of the feeding ports 14 are wound around the flange 1 The circumferential direction is evenly spaced, the discharge port 41 is the same as the feed port 14, and the discharge port 41 and the feed port 14 are alternately arranged; the lower surface of the upper flange 1 corresponds to each discharge port 41. A trough-shaped air chamber 12 is disposed at the side of the upper flange 1 and an air inlet hole 11 communicating with the air chamber 12 of the trough-shaped cloth is provided. The cross-sectional shape of the trough-shaped air chamber 12 and the discharge port 41 are provided. The shape is the same.

Specifically, the upper surface of the upper flange is connected to the bottom of the blowing tank 7, and the upper and lower surfaces of the intermediate cylinder are correspondingly connected with the lower surface of the upper flange and the lower flange, and the impeller 3 is installed in the middle cylinder and with the middle cylinder Concentric and high in height with the height of the middle cylinder, the sealed bearing housing 5 is disposed at the lower portion of the lower flange, the lower portion of the rotating shaft 51 is connected with the transmission reducer 52 in the transmission device, the transmission reducer 52 is connected with the variable frequency motor 53, and the upper portion of the rotating shaft 51 is passed The sealed bearing seat extends into the center of the impeller 3 and drives the impeller 3 to rotate together. Since the inside of the feeder is subjected to high pressure, a sealing ring (not shown) is also provided between the upper flange 1 and the intermediate cylinder 2 connecting surface, and between the intermediate cylinder 2 and the lower flange connecting surface, the sealing ring The compression is connected by bolts.

In the embodiment, there are two feed ports 14 disposed at an upper flange 1 at an angle of 180°; the discharge port 41 has two projection clamps between two adjacent feed ports and a discharge port. The angle is 90°. This structure can increase the space utilization of the equipment, thereby improving the feeding capacity of a single unit.

The material falling from the spray can enters the cavity between the blades of the impeller 3 through the two feed ports 14, respectively, and the material is respectively taken to the discharge port 41 at the most circumferential position through the rotation of the impeller 3, through two The feed port 14, the impeller chamber 31 and the two discharge ports 41 form a two-channel material delivery structure. Of course, in the case where the arrangement space satisfies the demand, three sets of staggered feed ports and discharge ports may be provided according to the situation to form a three-channel material conveying structure.

In this embodiment, the lower surface of the upper flange 1 is disposed at a position corresponding to each discharge port 41 of the lower flange 4, and a groove-shaped air chamber 12 matching the shape of the discharge port is provided, and the side surface of the upper flange 1 is provided with a groove shape. The air inlet hole 11 communicating with the air chamber 12 is provided with an orifice plate 13 at the lower portion of the grooved air chamber 12, and a plurality of gas injection holes are arranged in the array on the orifice plate 13, and the orifice plate 13 can be opposite to the groove of the groove-shaped air chamber 12. The plugging is performed so that the gas can only be sprayed through the gas injection holes in the orifice plate 13, so that the material at the discharge port 41 is injected by the high pressure gas from the orifice plate 13 through the discharge port and the discharge pipe. Corresponding to the connected material conveying pipe.

In this embodiment, the two feed ports 14 disposed on the upper flange are fan-shaped cross-section holes of the same size, and the fan-shaped cross-sectional hole size is calculated according to the flow property of the material to ensure that the material is sufficiently filled in the impeller cavity 31. . In order to distribute the material uniformly in the impeller cavity 31, two strip-shaped plates 15 may be disposed at each of the feed ports 14, and the center line of each of the strip-shaped plates 15 does not pass through the center of rotation of the impeller, so that the upper surface of the impeller cavity 31 The material is subjected to additional centripetal force or centrifugal force when moving relative to the strip plate 15, so that the material moves in the impeller cavity to achieve the purpose of mixing and filling the material in the impeller cavity. Here, the shape of the strip plate 15 is preferably a rectangular parallelepiped shape.

In this embodiment, a cavity is disposed at a position where the lower portion of the sealed bearing housing 5 is connected to the transmission reducer 52, and the cavity should be insulated from the bearing installed in the sealed bearing housing 5 to prevent lubricating oil from leaking into the cavity. An opening is formed on the circumferential side wall of the sealed bearing housing 5 corresponding to the cavity, and the detecting element 54 is disposed at the opening, and the sensing plate 55 is correspondingly disposed on the rotating shaft 51 in the cavity, and the detecting component 54 passes The induction plate 55 on the induction shaft 51 pulses to detect the rotational speed of the shaft 51.

In order to improve the service life of the worn parts of the device, the lower surface of the upper flange 1 on the feeder, the upper surface of the lower flange 4, the inner surface of the intermediate cylinder 2, the outer surface of the impeller 3, the inner surface of the discharge port 41, The hard alloy layer 6 is fixed by surfacing in a position where the inner surface of the discharge pipe 42 is easily worn.

As a further improvement of the above solution, the intermediate cylinder 2 in the embodiment is provided with a pressure equalizing exhaust pipe 21, and the pressure equalizing exhaust pipe 21 corresponding to the non-material flowing through the discharge port 41 flows through the passage side (from the feed The material entering the impeller cavity is brought into the feed port by the rotating impeller. The rotating impeller pushes the material into the discharge port from the side of the discharge port in the direction of rotation. The push-in side is the material flowing through the channel side, and the other side Then, the non-material flows through the channel side; the pressure equalizing exhaust pipe 21 and the blowing blow tank 7 are connected through the communication line, and the check line D01 is arranged on the communication line. The pressure equalizing exhaust pipe 21 can prevent backflushing of the material of the feed port by the high pressure gas, prevent the material of the spray can 7 from entering the pressure equalizing exhaust pipe 21, and the check valve D01 can prevent the material from directly entering the feed through the connecting pipe. machine.

In order to enhance the fluidity of the material at the upper surface of the upper flange 1, the present embodiment fixes an arched guiding surface (not shown) on the upper surface of the upper flange 1 (not at the position of the feed port) to guide the material. Feed port 14. The fluidizing pores are arranged on the arched guiding surface so that the outlet direction of the air holes faces the feeding port 14, which further enhances the fluidity of the material at the upper surface of the upper flange 1.

As a further improvement of the above scheme, the cross-sectional area of the cavity 31 formed between the impeller blades is decreased from top to bottom. It facilitates the flow of material and the full filling of the cavity. The impeller hub in the embodiment is in the shape of a truncated cone, and the truncated bus bar can adopt a curved flow line shape such as a hyperbola which is favorable for material flow. In the specific implementation, the shape of the truncated bus bar can be selected according to the manufacturing difficulty balance.

As a further improvement of the above solution, a sealed bearing seat can be further fixed at the center of the upper flange 1, and the lubricating grease of the bearing can be supplied through the upper flange 1 (not shown) to enhance Stability of the operation of the impeller 3.

In order to prevent dust from entering the bearing, in addition to installing a sealed dust seal in the sealed bearing housing 5, a gas seal structure may also be provided, and the gas seal gas pressure should be slightly higher than the pressure of the spray can.

In order to enhance the fluidity of the material in the discharge pipe 42, fluidized pores may be arranged on the inner wall of the discharge port 41 or/and the discharge pipe 42. To facilitate fluidization uniformity, the pores shall be provided with a plurality of small holes and fluidized. The direction of gas injection should be close to the direction of material flow.

The utility model relates to a conveying pipe connecting structure suitable for the above pneumatic conveying feeder, which comprises a conveying pipe which is connected with the discharge pipe and the reactor one by one, and a gas source is connected to the front end of each conveying pipe; any one of the conveying pipes passes through the branch pipe respectively The other conveying pipes are correspondingly connected, and each material conveying pipe and each branch pipe are provided with a material shut-off valve, and the material shut-off valve disposed on each conveying pipe is located between the branch pipe outlet and the inlet of the conveying pipe.

In this embodiment, the connecting structure of the conveying pipe is connected with the outlet of the feeding machine by two material conveying pipes 01 and 02, and the gas source T01 and T02 for blowing and conveying are connected at the front end of each conveying pipe 01 and 02. The materials entering the two conveying pipes can be sprayed and conveyed in the direction of the reactors F1 and F2, and two conveying control modes can be adopted according to the use requirements;

In the first way, the two-channel pneumatic conveying feeder feeds only one reactor: two conveying pipes 01 and conveying pipes 02 are merged at a suitable position to a conveying pipe 01 or 02 through a branch pipe, and then the converging The conveying pipe 01 or 02 is connected to a reactor F1 or F2;

In the second way, the two-channel pneumatic conveying feeder feeds two reactors: two conveying pipes 01 and a conveying pipe 02 are respectively connected to the two reactors F1 and F2, and the conveying pipe 01 and the conveying pipe 02 are appropriately The positions are provided with branch pipes communicating with each other to form a branch pipe cross-converging conveying structure, and material shut-off valves S01 and S02 are respectively arranged near the branch pipe outlets of the conveying pipes 01 and 02, and material shut-off valves V01 are correspondingly arranged on the conveying pipes 01 and 02, V02, the material shut-off valves V01 and V02 are respectively located between the branch pipe outlets and the inlets of the conveying pipes 01 and 02. When the reactors F1 and F2 require materials at the same time, S01 and S02 are closed, V01 and V02 are opened, and the reactors F1 and F2 are respectively sprayed and conveyed by the conveying pipes 01 and 02; when only one of the reactors F1 and F2 requires materials, By feeding S01, S02, V01, V02, the material discharged from the feeder is fed to only one reactor.

It is to be understood that the above-described preferred embodiments are only illustrative of the technical solutions of the present invention, and are not intended to be limiting, although the present invention has been described in detail by the foregoing preferred embodiments, those skilled in the art Various changes are made in the details without departing from the scope of the invention as defined by the appended claims.

Claims (10)

A pneumatic conveying feeder comprising an intermediate cylinder, an upper flange and a lower flange correspondingly disposed at two ends of the intermediate cylinder, an impeller disposed in the intermediate cylinder, and a sealed bearing seat disposed under the lower flange; The upper flange and the lower flange are correspondingly provided with a feeding port and a discharging port, and the discharging port is correspondingly connected with a discharge pipe, and the impeller is connected with a rotating shaft passing through the sealed bearing seat, and is connected to the rotating shaft The transmission device at the other end drives the rotation; the utility model is characterized in that: at least two inlet ports are evenly spaced around the circumferential direction of the flange, the discharge port has the same number of inlet ports and the discharge port and the feed port a staggered arrangement; a groove-shaped air chamber is disposed at a position corresponding to each of the discharge ports on the lower surface of the upper flange, and an air inlet hole communicating with the air chamber of the groove-shaped cloth is disposed at a side surface of the upper flange, The cross-sectional shape of the grooved air chamber is the same as the shape of the discharge port. The pneumatic conveying feeder according to claim 1, wherein an orifice plate is disposed below the grooved air chamber, and the orifice plate is provided with a plurality of gas jet holes. The pneumatic conveying feeder according to claim 1, wherein the feed port has two inlets disposed at an upper angle of 180°; the discharge port has two, two adjacent The projection angle between the feed port and the discharge port is 90°. The pneumatic conveying feeder according to claim 3, wherein the two feeding ports are fan-shaped holes of the same size, the feeding port is provided with a strip plate, and the center line of the strip plate does not rotate through the impeller. center. The pneumatic conveying feeder according to claim 1, wherein the transmission device comprises a transmission reducer connected to the rotating shaft, and a variable frequency motor connected to the transmission reducer; the lower part of the sealed bearing housing is provided The cavity, the circumferential side wall corresponding to the cavity on the sealed bearing seat is provided with a detecting component, and the rotating shaft located in the cavity is correspondingly provided with an induction plate. The pneumatic conveying feeder according to claim 1, wherein the portion of the feeder that is easily worn by the material is fixed by a weld overlay with a cemented carbide layer. The pneumatic conveying feeder according to claim 1, wherein the intermediate cylinder is provided with a pressure equalizing exhaust pipe, and the equalizing exhaust pipe corresponds to a non-material flowing through the discharging port. a side; a check valve is arranged on the communication line between the pressure equalizing exhaust pipe and the blowing blow tank. The pneumatic conveying feeder according to claim 1, wherein an upper surface of the upper flange is provided with an arched guiding surface. The pneumatic conveying feeder according to claim 1, wherein a cross-sectional area of the cavity formed between the impeller blades is decreased from top to bottom. A conveying pipe connecting structure suitable for the pneumatic conveying feeder according to any one of claims 1 to 9, characterized in that the conveying pipe comprises a conveying pipe which is connected to the discharge pipe and the reactor in one-to-one correspondence, and each conveying pipe The front end is connected with a gas source; any one of the conveying pipes is respectively connected with the remaining conveying pipes through the branch pipes, and each of the conveying pipes and each branch pipe is provided with a material shut-off valve, and the material shut-off valve disposed on each conveying pipe is located at the conveying pipe. Between the branch outlet and the entrance.

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