JPH0278477A - Collector for harmful material and device for temporarily storing and discharging granular material - Google Patents

Abstract

PURPOSE: To safely and effectively treat asbestos-contg. materials by adopting the constitution to collect the asbestos material discharged from a hopper into a bag without polluting the atmosphere by shutting off a slide gate valve from the outdoor air when the bag is mounted at a discharge port. CONSTITUTION: The liquid pressure unit of a vehicle is activated to raise the hopper 3, a housing 5 and the discharge port 7 to an operation position. The port of the asbestos bag 45 is put on the discharge port 7 and a bag clamp 47 is closed. The bag is supported in a drum 15. When a control function of a hopper vacuum system or the like is started, vacuum is generated in the hopper to suck the asbestos material into the hopper 3. A hopper port 16 is opened for the purpose of discharging the hopper 3. When the material is filled in the bag 45, the gate 53 is closed under the hopper port 16. Next, water is supplied to spray nozzles 103, 105, 107 and after the interior of the housing 5 is cleaned, the bag is closed under the discharge port 7 and is tightly sealed.

Description

[Detailed Description of the Invention] Industrially superior! TECHNICAL FIELD The present invention relates to material handling equipment, and more particularly to a storage and discharge equipment for hazardous materials.

The dangers associated with asbestos are well known. Unfortunately, this danger was not recognized in the past.

Many building components such as duct and piping covers contain ashesto. Asbestos-containing materials must be removed from existing buildings due to the potential for future health problems.

Asbestos is equally hazardous to workers removing asbestos materials from buildings and to personnel within the building. Workers must wear special clothing.

Asbestos materials should be removed from ductwork and other equipment with extreme care to prevent asbestos-containing dust and particles from contaminating the building. Asbestos-containing materials must be collected and disposed of in a manner that does not pose a hazard to asbestos removal workers and personnel working in or visiting the building.

Skin development summer photography required According to the present invention, an asbestos collection device is provided.

To provide an apparatus capable of processing asbestos-containing materials more safely and effectively than known apparatuses. To this end, a self-cleaning valve is included to control the flow of material from the collection hopper to the disposable container.

Asbestos collection equipment has large closed hoppers that temporarily store asbestos-containing materials. The hopper forms part of the vacuum system that collects asbestos material from within the building. The shape of the hopper is an inverted cone, with one conical point serving as the mouth, and the material is discharged in a controllable manner.

1 to control the flow of asbestos material from the hopper
A sliding gate valve is provided according to the invention. A sliding gate valve includes a valve gate that slides across the hopper mouth.

When the gate is in the first position, the gate closes the hopper mouth and blocks vertical flow of asbestos material from the hopper. In the second position, the gate opens the hopper mouth and the material in the hopper falls by gravity into the container below.

The gate slides horizontally between open and closed positions within a substantially enclosed housing mounted at the lower end of the hopper.

The dimensions of the housing accommodate the valve gate in both open and closed positions, and the valve gate is completely isolated from the outside atmosphere. To control the valve gate, the slide gate valve has an operating shaft and a lever mounted on the outside of the housing. The operating shaft operates a drive mechanism to horizontally move the valve gate between open and closed positions. The lever operates a mechanism that selectively moves the gate up and down relative to the hopper mouth. The seal between the hopper mouth and the hopper mouth shall be a combination of a wiper and a seal attached to the hopper mouth. When the gate is in the latched position, a vacuum is applied within the hopper to collect asbestos material into the hopper. The housing housing the slide gate valve has a vertical outlet directly below the hopper mouth. The outlet opening in the housing shall be smaller than the diameter of the asbestos-containing bag.

A bag clamp surrounding the circumference of the spout releasably secures the asbestos bag to the spout. For a positive seal between the spout and the asbestos bag, the bag clamp has an inwardly directed circumferential flange overlapping the free end of the spout. When an asbestos bag is attached to the discharge port, the inside of the hopper and housing, as well as the slide gate valve, are isolated from the outside air.

Further in accordance with the invention, the housing of the sliding gate valve includes a series of water jets. The jets direct water against the inner walls of the housing, washing asbestos fines and particles into the asbestos bag. The inner wall of the housing is lined with a non-stick surface to simplify the cleaning process. Thus, very little asbestos remains within the housing and is not dispersed into the outside air when the asbestos bag is replaced.

The asbestos collection device of the present invention can be mounted on a vehicle, making the system portable. Further, the hopper is vertically movable on the vehicle between an upper operative position and a lower inoperative position. In the non-operating position, the discharge port is at a position slightly above the ground.

In the upper operating position an asbestos bag can be clamped below the outlet.

Embodiments and drawings illustrating the present invention will be described.

Figure 1.2 shows an asbestos collection device according to the invention.

Although the collection device 1 is particularly advantageous for collecting and disposing of asbestos-containing materials, the invention is not limited to applications involving hazardous materials.

The asbestos collection device 1 is a homper 3. The collection device, including the housing 5 and the discharge lower, is mounted on a vehicle 9, for example,
Facilitates transportation between workplaces. The device 1 is attached to the vehicle 9 via a structural support member 11 connected to the upper end of the hopper 3 by means not shown. The support member 11 is rotated and extended by a hydraulic device (not shown) attached to the vehicle, and is moved to the hopper 3. The housing 5 and the discharge lower are moved vertically. In the lower inoperative position shown in FIG. 1, the discharge lower is close to the ground 13 with a clearance of approximately 1.5 feet (45 cm). Second
In the upper operating position shown, the apparatus 1 is sufficiently spaced from the ground 13 to permit placement of a large container, such as a 55 gallon (20011) drum 15, below the discharge lower.

In FIG. 3, the hopper 3 is an airtight, thin-walled, generally frustoconical container. The small diameter part of hopper 3 is the hopper mouth 16
form. The hopper 3 is connected to the top plate 17 of the housing 5 by the necessary fasteners 23.

The flange 21 is airtightly connected to the lower end of the hopper. The central portion 25 of the tube 19 passes through an opening in the top plate 17 of the housing.

The lower end of the tube has an outwardly directed annular flange 27. tube 19
An annular combination seal 31 is mounted within the bottom surface 29 of the lower flange 27 of the. The combination seal 31 is a combination of an O-ring 33 and a wiper 35.

The housing 5 includes a top plate 17 and opposing end walls 37, 39 . front wall 4
It has a 1° rear wall 42 and an inclined bottom wall 43. The discharge lower is approximately cylindrical, and the housing walls 37, 41, 42, 43
be integrally joined to the bottom edge of the The housing is sealed except for the discharge lower and the hopper 16. The diameter of the discharge lower is smaller than that of a normal asbestos bag 45, and a bag clamp 47 is attached around the discharge lower. The clamp 47 is in the mounting position in Figure 3, but for clarity in Figure 0,
The gap between the clamp part, the bag 45 and the discharge lower is exaggerated. When the clamp 47 is attached, the compressible ring 48 extends below and surrounds the outlet end face 52 to ensure a secure seal between the outlet lower and the bag 45, and when the inner surface of the bag 45 is washed, the compressible ring 48 extends under and surrounds the outlet end face 52, and when the inner surface of the bag 45 is washed, the compressible ring 48 extends under and surrounds the outlet end face 52. Make sure that no material remains.

Thus, when the bar knob is removed, no harmful substances remain on the closing part.

A slide gate valve 51 is mounted within the housing 5 to control the flow of material 49 collected within the hopper 3. Slide gate valve 51 includes a flat gate 53 that is horizontally reciprocatable within the housing in the direction of arrow 55. A series of vertical openings 57 are formed in the gate 53 for reciprocating the gate. The opening 57 meshes with the teeth of the gear 59,
The gear 59 is rotated about a horizontal axis 61. Bracket 62 attached to opposite front and rear walls 41, 42 of the housing
A shaft 61 is rotatably supported. If the shaft 61 is rotated clockwise in FIG. 3, the gate 53 will move to the left and will be positioned below the bulge 16 and tube 19.

If the shaft 61 is rotated counterclockwise in FIG. 3, the gate will move to the right and will be at a position of -53° as shown by the dashed line, opening the E-7 paro.

To rotate shaft 61 and gear 59 to move gate 53, shaft 61 is extended through housing front wall 41. A handle 83 is attached to the outside of the housing 5 of the shaft 61. Rotating the handle 83 outside the housing moves the valve gate within the housing.

The sliding gate valve 51 has a series of rollers to support the valve gate 53 within the housing 5.

The rollers are supported on the front and rear walls of the housing 41,42.

At least three sets of rollers 63 are used near the hopper tube 19 and at least two sets of rollers 65 are used near the housing end wall 39 remote from the tube 19. roller 6
3 is attached to a polarizing shaft 67 extending through the front and rear walls of the housing. When the shaft 67 is in the position shown in FIG. 4, the roller center line 69 is below the shaft center 1i171. Under this condition, the gate is in an unlatched position, resting on the roller and forming a gap C between the seal 31 and the top surface 73 of the gate. Rotating the shaft 67 by the mechanism described above causes the roller 63 to move upwards in FIG. 3.4. The roller raises the gate a small amount in the direction of arrow 75. When the gate is raised to the latched position, the first gap C disappears and the top surface 73 of the first gate is pressed against the seal 31, as shown in FIG. 3. Only when the gate is in the lower position shown in FIG. 4 away from the seal 31 can the shaft 61 gear 59 be rotated to move the gate in the direction of arrow 55.

The roller 65 is mounted on a stub shaft 77, which is mounted on the housing front l&wall 41.42. The axis 77 and the center line of the roller 65 coincide, and this center line is the same as the center line 6 of the roller 63 when the roller 63 is in the lower position shown in FIG.
Matches 9. The gate 53 that is not latched when the roller 63 is in the lower position is moved by the gear 59 to the roller 63.
．． 65.

A control linkage 76 is used to rotate the eccentric shaft 67 for latching and releasing the valve gate 53. Control linkage 76 includes a short lever 78 mounted on one end of an outwardly extending shaft 67 of housing wall 41,42.

The free end of lever 78 is pivoted to a common tie rod 80. Another lever 109 connected to one end of the tie rod 80 is pivoted on a shaft 85 in a bearing block 87. One end of a short arm 89 is fixed to the shaft 85. The other end of arm 89 is pivoted to one corner of triangular link 91. The second triangular link 91
The corners of are pivoted to blocks 93 on the housing top plate 17 by short pins 95. A third corner of link 91 pivots to one end of rod 97. The other end of the rod 97 is a lever 99
The lever 99 is rotatably supported on the top plate 17 of the housing about a vertical axis. When the handle 101 of the lever 99 is pushed forward toward the hopper 3, the lever 78 pivots to lower the roller 63 and release the valve gate 53 from the seal 31 of the hopper tube 19. This state is shown in Figure 1.4. Pushing the handle 101 away from the hopper moves the lever 78 to place the valve gate 53 in a sealing position against the hopper seal 31. This latched state is shown in FIG. 2-3. Arm 89. Link 91 and block 93 form an over-center lock to ensure that valve gate 53 remains in the latched position when handle 101 is in the rearward position.

To control the operation of the asbestos collection device 1 according to the invention, various devices can be used which operate in response to the performance of other components. For example, a first limit switch 79 is mounted on the housing wall 37 and a valve gate 53 is hopper mouth 16
The closed position 1 can be sensed under the closed position 1. Activating the limit switch 79 with the closing gate activates the vacuum system to collect material 47 in the hopper 3. Another mint switch 81 may be used to sense the opening of the gate and actuate a mechanical loading device, not shown, to force material 49 through the hopper mouth and tube I9 into asbestos bag 45.

According to the invention, the housing 5 of the asbestos collection device 1
has the self-cleaning function of asbestos materials. For this purpose, the inner surfaces of the walls 37.39, 41, 42.43 are coated with a non-adhesive material. Internal motion members shall be stainless steel. Use a water scrubber to remove as much asbestos as possible from within the housing. Front nozzle 103
is directed toward the wall 37, and the nozzle 105 is located near the end wall 39.

Combination nozzle 107 is mounted below valve gate 53. Each nozzle scrubs asbestos dust and particles from all interior surfaces of the housing.

In operation, the vehicle's hydraulic unit is actuated to drive the structural support member 11 and the hopper 3. Raise the housing 5 and discharge lower to the operating position shown in FIG.

Open the bag clamp 47. Place the mouth of the asbestos bag 45 over the discharge lower and close the bag clamp.

The bag is supported within the drum 15.

For safety reasons, the controlled snowmaking of the asbestos collection device is such that the slide gate valve 51 is reciprocated before activation of the hopper vacuum system. To do this, push the handle 101 of the control linkage 78 forward towards the hopper 3 and press the link 91 .
Release the over center lock including 89. The valve gate 53 is released and turning the handle 83 counterclockwise relative to FIG. 1.2 moves the valve gate and activates the rear control limit switch 8I. , and move the gate below the hopper mouth. This actuates limit switch 79 and initiates control functions such as the hopper vacuum system. When the control ring handle 101 is rotated away from the hopper, the gate latches onto the tube seal 31 and a vacuum is created within the hopper to draw asbestos material into the hopper.

To discharge the hopper 3, push the handle 101 forward to release the over-center lock, and then
3 counterclockwise to open the hopper mouth 16 (when the bag 45 is full or when the hopper 3 is empty,
Rotate the gate handle 83 clockwise to close the gate 53 below the hopper mouth 16 and latch it with the handle 101. Next, a control valve (not shown) is opened to supply water to the spray nozzles 103, 105, 107. The nozzle cleans the inside of the housing 5. Continue spraying water until only clean water enters the asbestos bag 45. Close the bag under the discharge lower and seal tightly. Remove the bag clamp 47, remove the filled bag, and install new bags and 2 bags. To prepare for operation, attach the bar knob to the outlet, place the slide gate valve in the latched position, and place the control linkage handle 101 in the overcenter lock position. Thus: 1. The slide gate valve and other housing interiors are isolated from the hopper interior and outside air.

As stated above, a slide gate valve arrangement for an asbestos collection device according to the present invention satisfies the aforementioned objects and advantages. Although the present invention has been described with reference to preferred embodiments, the present invention can be modified in various ways, and the embodiments and drawings are merely illustrative and do not limit the invention.

[Brief explanation of the drawing]

1 is a perspective view of the asbestos collection device of the present invention in the inoperative position, FIG. 2 is a front view of the device in the operative position, FIG. 3 is an enlarged sectional view taken along line 3-3 of FIG. 1, and FIG. The figure is an enlarged sectional view taken along line 4-4 in FIG. 100. Asbestos collection equipment 300. Hopper 518.
Housing 788. Discharge port 908. Vehicle 161. Hopper mouth 190. Pipe 3109 combination seal 450. Asbestos bag 471. Clamp 513. Slide gate valve 530. Valve gate 591. Gear 63.65.
,,roller 670. Eccentric shaft 761. Control link device 918. Triangular link 79.81. ,,Limit switch

Claims (1)

[Claims] 1. A hazardous material collection device comprising: a. a closed hopper holding asbestos-containing material and having a discharge port; b. a substantially closed housing mounted near the mouth of the hopper; c. , a discharge port attached to the housing for directing material to be discharged from the hopper mouth; d. a slide attached to the housing for selectively closing or opening the hopper mouth to control the discharge of material from the hopper mouth; a gate valve; and e. clamping means for releasably clamping the asbestos bag to the outlet so that when the bag is attached to the outlet, the sliding gate valve is isolated from outside air and the asbestos material discharged from the hopper. A hazardous material collection device characterized in that the materials are collected in a bag without polluting the atmosphere. 2. The slide gate valve comprises: a. a valve gate installed in the housing; b. gear means for reciprocating the valve gate between positions for closing and opening the hopper mouth; c. a valve gate installed in the housing; d. a first roller means mounted within the housing for supporting the valve gate when the valve gate is in a position to open the hopper mouth; d. a second roller means mounted within the housing for supporting the valve gate when the valve gate is in a position to open the hopper mouth; roller means; e. a control linkage for actuating the first roller means to selectively latch the valve gate into sealing contact with the hopper mouth or open the valve gate out of sealing contact with the hopper mouth; 2. The apparatus of claim 1, comprising: 3. forming a plurality of openings in the valve gate, the gear means comprising: i. at least one gear rotatably mounted within the housing and meshing with the opening of the valve gate; and ii. a gear mounted outside the housing. 3. The apparatus of claim 2, further comprising handle means for rotating the means, wherein rotation of the handle means causes the valve gate to reciprocate within the housing. 4. The first roller means comprises: a. a plurality of eccentric shafts rotatably mounted on the housing; and b. a first roller mounted on each eccentric shaft for supporting the valve gate. equipment. 5. The control linkage device includes: a) a plurality of levers each having one end fixed to an eccentric shaft; b) a coupling means pivotally supporting the other end of each lever; c) attached to the housing and having a latched position and a released position. d. a handle for selectively pivoting between the coupling means, the lever, the eccentric shaft and the coupling means by selectively moving the handle between the latched and released positions; and d. 5. The apparatus of claim 4, wherein the valve gate is brought into sealing contact with the hopper mouth in the latched position and away from the hopper mouth in the released position. 6. Link means connecting the handle to the coupling means,
6. The apparatus of claim 5 including an overcenter lock for positively locking the valve gate into latched, sealing contact when the handle is in the latched position. 7. The apparatus of claim 1, further comprising spray means mounted within the housing for cleaning asbestos material from within the housing and directing water and material into the asbestos bag. 8. A device for temporarily storing and discharging granular materials, which includes: a. a nearly closed hopper with a discharge port; b. a housing installed near the hopper mouth; and c. a valve gate installed in the housing. d. gear means for reciprocating the valve gate within the housing between a first position in which the valve gate covers the hopper mouth and a second position remote from the hopper mouth; e. moving the valve gate within the housing; , link means for moving between a latched position in which the valve gate is in sealing contact with the hopper mouth and a released position in which the valve gate is not in sealing contact with the hopper mouth; f linkage means coupled to the housing below the hopper mouth to remove material discharge from the hopper; g, clamping means surrounding the outlet means and releasably clamping to the outlet a container for receiving material discharged from the hopper mouth, wherein the material discharged from the hopper is exposed to the ambient atmosphere. A device for temporarily storing and discharging granular material, characterized in that it enters a container without contaminating the granular material. 9. The valve gate has a plurality of openings, and gear means for reciprocating the valve gate includes: i. at least one gear rotatably mounted within the housing and meshing with the opening of the valve gate; and ii. 9. The apparatus of claim 8, further comprising handle means for rotating the gear at the housing, the handle means being rotated outside the housing to reciprocate the valve gate within the housing. 10. The linking means comprises: a. a first roller means mounted within the housing for supporting the valve gate when the valve gate is in a position to close the hopper mouth; and b. c. second roller means mounted outside the housing for supporting the valve gate when in a position for opening the hopper mouth; c. and a control linkage for moving between: i. a plurality of eccentric shafts rotatably mounted to the housing and extending between the housing walls; ii. a roller mounted on each eccentric shaft within the housing to support the valve gate, the control linkage including lever means for selectively rotating the eccentric shaft, and wherein the roller mounted on the eccentric shaft raises the valve gate. 11. The apparatus of claim 10, wherein the valve gate is in a latched position relative to the hopper mouth and the valve gate is lowered into a released position away from the hopper mouth. 12. The apparatus of claim 11, wherein the control linkage further includes an over-center lock for positively locking the valve gate in the latched position. 13. The apparatus of claim 8, further comprising means mounted within the housing for cleaning particulate material from within the housing into a bag clamped at the outlet for self-cleaning the apparatus. 14. The apparatus of claim 8, wherein the hopper is mounted on a vehicle for transport, the vehicle having structural means for positioning the hopper in a predetermined vertical position relative to the vehicle.