JPS60106736A - Device for adjusting quantity of bulk cargo - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention is a device for metering bulk material into at least one pneumatic conveying conduit, which comprises a connecting part for the conveying conduit in the form of a cylinder. an impeller rotatable about a vertical axis in a casing, into which a primary air conduit opens from the bottom parallel to the axis of the impeller, and the casing is to be conveyed to the top. It relates to a type having an opening for feeding bulk material in free fall.

BACKGROUND OF THE INVENTION Bulk materials can be conveyed continuously from a pressure chamber of any height into a pneumatic conveying conduit against a relatively high or low pressure established in the conveying conduit. A so-called impeller-type sluice gate is well known as a metering device. The impeller is arranged so as not to be rotatable relative to the horizontal axis and consists of a ferrule and radial vanes, which, depending on the shape of the boss and the vanes, delimit a wedge-shaped or trapezoidal impeller compartment. The bulk material reaches each impeller compartment through the upper inlet opening and, after a rotation of approximately 180', optionally aided by compressed air, is introduced through the outlet into the conveying conduit. The amount of bulk material metered in this manner increases once as the impeller rotational speed increases, but decreases again as the rotational speed increases further. This reduction in bulk material is due to centrifugal force. Therefore, meter each time unitii
The maximum load capacity that can be achieved is only achieved at rotational speeds of approximately 20 to 40 revolutions per minute. As a result, another disadvantage becomes noticeable when a relatively high pressure is built up in the conveying conduit on the inlet side of the impeller-type sluice gate. Due to the gas flow in the opposite direction to the rose Takehara to be metered, and due to the inevitable structural gap between the impeller and the leg, In the case of bulk particles, the filling of the impeller compartment is prevented. Problems also arise with bulk materials that have a high tendency to flow and form nests. This is because the relatively narrow inlet cross section which is necessary due to the construction prevents continuous filling of the impeller compartment.

Devices of the type mentioned at the outset, ie devices with an impeller rotatable about a vertical axis, are likewise already prior art. The bulk material is fed through an eccentric opening that corresponds approximately to the cross-section of one impeller compartment and, after a further transport of approximately 180° lfG, is connected to the connection for the conveying conduit from the respective impeller compartment. It is blown out to the department. This connection is coaxially aligned with the opening of the primary air conduit. The disadvantage of this device is that the narrow inlet cross section prevents a continuous inflow of the bulk material to be metered, especially in the case of highly cohesive bulk materials. It is.

Problem to be Solved by the Invention The problem to be solved by the invention is to provide a device of the type mentioned at the outset by making it possible to obtain high metering efficiency even for bulk materials that are difficult to flow. be.

Means for solving the problem A solution to the above-mentioned problem is that the supply volume is approximately the same as the upper end surface of the casing, and the connection for the conveying conduit is connected to the opening of the primary air conduit ( radially departing from the casing on the side of It covers the compartment space.

Embodiment In an arrangement which is particularly advantageous and possibly necessary in the case of bulk materials that do not flow easily, a pushing device extending in two directions through the feed opening is connected in a relatively rotationally fixed manner to the impeller. has been done.

The complete filling of the impeller compartment, especially in the case of large impeller diameters, can be further facilitated by the fact that the Jζ space of the impeller carries a deflection cone.

Furthermore, the device according to the invention offered the possibility of simultaneously metering equal bulk quantities into several conveying conduits. In the configuration of this embodiment, the casing has a plurality of openings distributed over the periphery of the casing for the primary air, a plurality of connections for the conveying conduits and a plurality of plates covering the corresponding spaces. are doing.

In a further advantageous embodiment, the impeller is not mounted on the drive shaft, but the drive shaft is supported in two bearings arranged at a distance from each other in the housing for rotational rotation of 11 J. , two of the bearings are knolled by a seal part 4'l disposed above the bearing, and the lower bearing is knolled by a 7l member disposed below the bearing. By being able to supply scavenging air to the two bearings via compressed air channels, it is possible to obtain an externally accessible and dust-proof bearing for the impeller.

111) In the configuration 11jIj, which is a further variation of the above-mentioned embodiment, the - side knob part and the lower sealing member can each be post-tensioned from the 1st part by means of a post-adjustable holding ring. .

It often occurs that it is necessary to be able to vary the bulk material Jd to be metered into the conveying conduit from time to time over a wide range. For this purpose, as is known,
Instead of using a steplessly adjustable speed-setting drive for the impeller, especially in a device of the type proposed by the present invention, the throughflow regulation can be achieved by: (
each) is connected to the conveying conduit via a piston conduit, and at least one of the cooking air conduit and the conveying conduit and the It can be done at a small cost by having a.

According to an advantageous embodiment of the aforementioned proposal, the valve is a three-way valve arranged in the primary air conduit or in the conveying conduit.

FIRST EMBODIMENT The device shown in FIGS. 1 and 2 consists of an impeller having a hose I and radial blades 2. The device shown in FIGS. This impeller is arranged in the casing 3 so as not to be able to rotate relative to the drive shaft 4.

The casing 3 has on its two sides an inlet opening extending over the entire cross-section of the end face for supplying bulk materials, into which the bulk materials can flow, for example, from the hollow lower part 12. For feeding the bulk material, the casing 3 is screwed via a flank 10 to a corresponding flank 11 of the bottom outlet of the hopper.

A stirring device i;t] 3, which is non-rotatably connected to the impeller, protrudes into this bottom outlet.

The casing 3 has an eccentric opening 1-1 on the lower side, into which primary air 6 is supplied via a primary air conduit 7. An opening 1-1 is provided in the circumferential wall of the casing 3 with a radius equal to the inlet 1 of this secondary air conduit 7, from which a connection 9 extends in the radial direction. . A conveying conduit (not shown) is connected to the connecting portion 9 for guiding the bulkhead in its position of use.

Output 11 from the primary air conductor l"!" to the connection 9 with the person "I"
The range of and is covered by the play 1-5 on the -[- side of the -c F)U. As shown in FIG.
``Tsubun'': The rim is wider in the circumferential direction.

With this 1'trj configuration, the bulk material inlet cross section can be made almost as large as a, and as a result, the bulk material can form a nest on the inlet side. t
If possible, the effect of Song will be obtained. Therefore, the stirring device 13
can be omitted for most bulk materials.

Furthermore, in this structure, if a relatively higher pressure is created in the primary air conduit 7 than in the hollow ξ in which the bulk goods are stored, the flow of leakage air will prevent the normal supply of bulk goods. There isn't. This is because the flow of leakage air takes place approximately in the direction of the arrow 14, i.e. in the opposite direction with respect to the drive shaft 4 to the bulk material flowing into the vane wheel compartment downwards in the direction of the arrow 14a. be.

Even at high rotational speeds of the impeller, the supply of bulk material is not impeded due to centrifugal forces. On the contrary, the centrifugal force actually assists the removal of the bulk material from the impeller. This is because the bulk material is accelerated in the direction of the connection 9. As confirmed by measurements, if a sluice gate with a diameter of 300 mm is provided, even at a drive speed of 50 revolutions per minute, 5
A filling efficiency of 0% or more can be obtained. Under similar conditions, the filling efficiency of the wheel-shaped sluice gate reaches only about 20%.

FIG. 3 shows a sectional view of a disadvantageous embodiment of the bearing of the drive shaft 4. FIG. The drive shafts 4 are ball bearings arranged at intervals]
, 5, and 16. In order to avoid the ingress of dust into the bearing, on one side of the ball bearing 15 and below the ball bearing 16 a knob iη11)l'A 18 or 21 is arranged. Furthermore, ball bearings], 5, 16
Scavenging air can be fed into the compressed air passages 23 , 24 , 25 , 26 .

/-Role part A: A] 8 and the knoll member 21 are configured so that they can be tensioned back. In order to allow the knoll member 18 to be tensioned from the 1st part, the +Ir part 1 of the impeller is constructed as a hollow body, and furthermore, the knoll member 18 is constructed as a hollow body.
iAA'] 8 to ring J1it"' of casing 3
1lS1.7 and crimp it and through the screw 20, -CJ1i'? After the ls, the l1rh section uJ function holding ring 19 is accommodated (-C.
<In collaboration with Material 21'*)7. , the other retaining ring 22 is formed by a cannub 3-note (111), and thus, like the retaining ring 19, rf#i can be simply post-adjusted.

Second Embodiment A device for observing the fIQ configuration shown schematically in FIGS. 4 and 5 has the power (capable of For example, it is applicable that pulverized coal is supplied to multiple units of coal combustion equipment (j [: i). ζJG-1-SAA
It has a relatively large diameter! J5J with 1" with 41
41i! It has a turret and a short blade or impeller web 42. The boss 41 is rounded by a conical part 428 having a stirring mechanism 413. Six connecting parts 4'9 are arranged evenly distributed over one circumference.
A, 49b, 49c, 49d, , 49e, 49f are respectively below G Koichi Fubuki 22L guide t4147 a, 4
7 b, lI 7 c, 47 d, 47
e, 47f is open to 1. Besides, 1 and 4 feathers
On the −1: side of j0(, the same number of plates 45 are placed at the relevant position.
a, 45b, 45c, 45d, 45e, 45f7 Uzu
1 [father i:, 1+i has been given.

Third Embodiment In the embodiment having the configuration shown in FIG. is the throttle valve 51
is located. If the drive speed of the impeller is constant, the amount of bulk material introduced into the conveying line 9a can be varied over a wide range by adjusting the throttle valve 51. As shown in FIG. 7, another throttle valve 52 can be arranged in the secondary air conduit 7 1-' of the branch point of the bypass conduit 50. This makes it possible to adjust the distribution of the amount of cooking air relatively accurately.

However, the use of a three-way valve is relatively advantageous compared to the use of two throttle valves 51 and 52 as shown in FIG. This three-way valve can be located either in the primary air conduit 7, as indicated by 53 in FIG. 8, or in the conveying conduit 9a, as indicated by 54 in FIG.

FIG. 1O shows an embodiment of a three-way valve 53 in the form of a movable throttle. FIG. 11 shows an embodiment of the three-way valve 54 as a pivotable flap.

The configuration in which the flow rate adjustment ρ17 can be performed continuously via the NOS pipe 50 shown in FIGS. 6 to 11 is the configuration shown in FIGS. 4 and 5. This is a significant advantage in equipment. This is because, in contrast to controlling the drive speed of the impeller, in the regulation via piston lines, the quantity of bulk material metered into the individual outgoing conveyor lines can be adjusted relative to each other. This is because they can be adjusted and changed independently. This adjustment via the space conduit becomes essential if, for example, the device 6 for bulk loading is used in a device for supplying pulverized coal to a pulverized coal burner. I can do it.

Effects of the Invention Due to the construction of the invention, centrifugal forces and any leakage outflow that may be present do not have any undesirable effect on the filling of the impeller compartment. Furthermore, due to the large cross section of the feed rate 1-J, the bulk material can be spread over a large rotational angle range of the impeller (jj!). Flows into the car compartment. This makes it possible to sufficiently fill this impeller compartment, especially due to the large cross section of the i-1 inlet opening 1.
Even in the case of highly cohesive bulk materials, it is possible to avoid nesting in the space located above the inlet opening.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of an apparatus for metering bulk materials according to a first embodiment of the present invention; FIG. 2 is a cross-sectional view of the apparatus of FIG. 3 is a longitudinal sectional view of the impeller support, and FIG.
A schematic side view of L, FIG. 5, shows the device of FIG.
Jlj1L schematic cross-sectional view along line -II, +i side, Figure 6, Figure 7, Figure 8, Figure 0, Figure 10, Figure 11
The figures are diagrams of various hole embodiments of a device having an adjustable Takehara vortex section.0 1... Boss, 2... Vane, 3... Casing, 4
... Drive shaft, 5. Plate, 6.-secondary air, 7.
・-Next air conduit, 9...Connection part, 9a・Transport conduit, 1
0...7 Ranno, 11...S J O Frank, 12.
・Lower part of hopper, 13... Stirring device, 14.14a・
・Arrow, 16...Ball bearing, 17...Ring shoulder, 1
8... Seal member, 19... Holder ring, 20...
・Screw, 21... Knoll part A122... Holder ring, 23.24.25.26', 27... Compressed air passage, 4]... Boss, 42... Impeller web, 43...
Casing, 44--Drive shaft, 45a, 45b, 45
c, 45d, 45e, 45f'... plate, 47a,
47b, 47c, 47d, 47e, 4'7f--Next air conduit, 49a, 49b, 49c. 49 cl +-490, 49f...Connection part, 50.
・Pinose ξ conduit, 51.52... Throttle valve, 53.5
4... Three-way valve, Cow 12... Hopper, 413... Stirring mechanism, Procedural amendment (method) December 18, 1980 Dear Commissioner of the Japan Patent Office 1 Indication of case 1982 Patent Application No. 166662 No. 2
, Title of Invention Device for measuring bulk materials 4 Agent November 27, 1981 (Date of shipment) 6. Subject to amendment

Claims (1)

[Claims:] Apparatus for metering bulk material to at least one pneumatic conveying conduit, rotating about a vertical axis in a cylindrical casing having a connection for the conveying conduit. an air conduit opening into said casing from the bottom parallel to the axis of the impeller, said casing supplying the top side with the bulk material to be conveyed in free fall; In the case of a type having an opening of 1", the supply amount 1-1 is almost the same as one end surface of the casing, and the connection part (9) for exclusive use of conveyance is used.
casing (3) above the opening of the secondary air conduit (7)
starting radially from , the supply volume ['' is covered by a plate (5) on the - side of the connection of the secondary air conduit (7), which plate (5) is connected to the impeller. Device for conveying bulk goods, characterized in that it covers at least one compartment space. 2. Device according to claim 1, characterized in that a pushing device (13) extending upwardly through the supply opening is connected to the impeller in a relatively rotationally fixed manner. 3 Impeller boss (1) deflects circle Φ [1 part (428)
3. A device according to claim 1 or claim 2, wherein the device retains the following: 11 The casing (43) has a plurality of openings distributed over the outer circumference of the casing (43) for next air.
l (47a, 47b, 47c, 47e. 47f) and a plurality of connections (49a, 47f) for conveying conduits.
49b, 49c, 49e, 49f) and a plurality of plates (45a, 45b, '45c, 45d, 45e, 45f) covering the corresponding spaces. Apparatus according to any one of the preceding clauses. 5. The impeller is mounted on a drive shaft (4) which has two bearings (1s, ,x) arranged at a distance from each other in the casing (3).
The upper bearing (15) is sealed by a sealing member (18) disposed on the two sides of the bearing (15), and the lower bearing (15) is rotatably supported on the bearing (15). 16) is knolled by a /-rule lever (21) arranged on the lower side of the bearing (16), and the two bearings (
15, 16) to compressed air passages (23, 24, 25, 26).
. 6.1: Upper knoll member (18) and lower knoll part 4;
6. The device according to claim 5, wherein each of the 4(2) and 4(2)) can be post-tensioned from the outside by means of a post-adjustable hold-down ring (19 or 22). A seventh air conduit (7) is connected to (each) the conveying conduit (9a) via a gas conduit (5o), and the seventh air conduit (7) and the conveying conduit (9a) and・At least one of the
0) for adjusting the amount of air flowing through the valve (51,
52). Apparatus according to any one of claims 1 to 6, having: 8. Device according to claim 7, characterized in that the valve is a three-way valve (53, 54) arranged in the secondary air conduit (7) or in the conveying conduit (9a).