JPS645676B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a ring-shaped or cylindrical filter drum whose end surface side is pressed against an opening in a partition wall in a housing formed to divide an inflow chamber and an outflow chamber of the housing. and a pivotable lid for filter replacement, the lid being configured to press against the housing and at the same time press the filter drum into close contact with the bulkhead opening, with the lid and lid closing arm A toggle lever mechanism consisting of two pressing fittings for controlling the lock release operation and the suppressing operation is provided between the two. The present invention relates to a filter housing for separating radioactive hazardous substances from a gas stream, which is actuated by the piston rod of a hydraulic cylinder eccentrically mounted against the filter housing.

BACKGROUND OF THE INVENTION In order to filter exhaust gases in nuclear installations, particularly reprocessing installations, there is a need for a filter housing that is suitable for accommodating a variety of filter loads and that can be replaced by remote control using a battery hoist. In case of failure of the hydraulic system required for the housing lid, it must be operable by means of a battery hoist. Critical components in nuclear installations require dual operation. When handling components, prolonging contamination must be avoided as much as possible. In order to guarantee the safety and reliability of equipment components, it is necessary to make them robust and consist of as few parts as possible. The filter housing must be able to accommodate the filter load with relatively loose manufacturing tolerances without compromising the sealing of the lid periphery.

The object of the present invention is to improve the twisting strength and overall stability of the fixing of the lid, the precision of the fit, the tightness of the filter, and the closeness of the filter in a filter housing as described at the beginning. In that case, the coupling must be able to transmit very strong actuation and locking forces and, to a certain extent, be able to tolerate a distorted installation of the lid.

In order to achieve the above object, the present invention, in the filter housing described at the beginning, forms the upper pressing fitting in an inverted U shape, and the upper joint shaft is rotatably inserted into the bottom of the pressing fitting. Both legs of the press fitting are pivotally supported by the toggle joint shaft,
In that case, both legs of the lower pressing fitting, which is formed into an upward U-shape and whose bottom is formed by the lower joint shaft, are surrounded by the two legs from the outside on the torgue joint shaft, and the bearing It is proposed that the lower joint shaft is rotatably and partially pivotably supported between both legs of the lower press fitting 15 by a spherical bearing fixed to the lid by the casing. Furthermore, in this case, the invention provides, in a preferred manner, two control strips for locking and releasing the pawls in a position on the axis of the toggle joint symmetrical about the center between the legs of the lower push-piece. It is proposed to fit them in pairs, fit the eyelet of the piston rod of the cylinder on the axis in the middle, and fit the two arms of the hook-shaped end of the emergency operation pull arm on the outside of the leg. are doing. Finally, the present invention provides an upper pressing fitting with the upper joint shaft and other components of the toggle lever joint inside the lid closing arm or pivot arm with a U-shaped cross section, and the upper joint shaft is It is proposed to be fixed to the arm.

The toggle lever mechanism for operating the lid according to the invention consists of three axes: an intermediate toggle joint shaft, an upper joint shaft and a lower joint shaft. Only rotational movements occur around these three axes. However, in order to compensate for certain dimensional tolerances when installing the lid, the bearings that fasten the lid to the lower joint shaft are designed as spherical bearings. At that time, "swivel freely"
This means that the spherical bearing is capable of performing not only rotational movements but also certain angular tolerances from the vertical or pivoting movements from the vertical. In this way, the lid aligns itself with the filter housing to certain dimensional tolerances.

Such a mechanism, operated by a single reciprocating hydraulic cylinder, lifts the housing lid vertically, unlatches, opens, and locks it, forces the filter charge against the packing piece, and closes the filter housing. It can be sealed airtight from the surrounding atmosphere. In that case, in particular, this structure is not susceptible to dimensional errors of the components or to distorted mounting of the lid on the housing. The precision and sealing properties of the fitting as well as the twisting strength of the fixing of the lid are improved. Next, the present invention will be explained in more detail with reference to FIGS. 1 and 2.

As shown in FIG. 1, a filter housing 1 consisting of a cylindrical tank is divided into two spaces 3 and 4 by a partition 2 having a communication opening 5. As shown in FIG. A cylindrical filter drum 6 with a ring-shaped cross-section is provided in the upper space 3, into which the gas flow to be cleaned flows from the circumference and is directed axially through holes in the bottom of the drum. It is starting to leak again. The filter drum 6 is operated by a special mechanism of the lid 7 of the housing 1 and is pressed airtight against the partition 2, so that the internal space of the drum communicates with the opening 5 through a hole on its axis. It's summery. The upper space 3 is provided with a gas inlet pipe 8 for contaminated air, and the lower space 4 is provided with a gas outlet pipe 9 for clean air, thus providing a space for the gas flow that needs to be cleaned. 3 passes through the filter drum 6 into the space 4
The gas is guided from the gas inlet 8 to the gas outlet 9.

As mentioned above, the partition 2 of the filter drum 6
The pressure on the filter drum 6 is carried out by the lid 7, which is provided with a spring-loaded element 10 which applies pressure to the upper surface of the filter drum 6 when the lid 7 is closed. For the seal between clean air and contaminated air, a seal is provided which is rigidly connected to the filter drum 6.

A mechanism for pressing the lid 7 consisting of a hydraulic cylinder and a lid closing arm, that is, a pivoting arm 12 is rotatably supported, and is connected to the filter housing 1 via a toggle lever joint 13 mainly consisting of an upper pressing fitting 14 and a lower pressing fitting 15. It is connected to the lid 7 of. A spring 16 is connected between the lid 7 and the pivoting arm 12, and this spring 16 is adapted to be lifted up together with the lid 7 toward the pivoting arm 12 when the press fittings 14 and 15 are in good condition. In order to transmit pressure from the toggle lever joint 13 to the lid 7, the pivot arm 12 is locked to the housing 1 by means of a pawl 17. At the end of the pressing operation of the lid 7, the toggle lever joint 13 is pushed to the left beyond the dead center and self-locks, and the hydraulic cylinder 11
By releasing the pressure, the pressure of the lid 7 against the housing 1 is maintained as it is. An emergency operating lever 18 is provided for emergency operation of the lid 7, which is pivoted by pulling the mushroom-shaped handle 19, thereby releasing the locking of the pull arm 20 for emergency operation of the lid 7.
The lid can be opened using a hoist.

The peculiarity of the invention lies in the structure of the toggle lever joint 13, which is shown in the enlarged cross-sectional view of FIG. As mentioned above, this toggle lever joint mainly consists of two push fittings 14 and 15, both of which are made up of two U-shaped legs. These legs are rotatably supported in common by a toggle joint shaft 21, so that the legs 22 of the upper press fitting 14 surround the legs 23 of the lower press fitting 15 from the outside in pairs, Both legs are intertwined. The upper press fitting 14 has a U-shape with a thick bottom 24, into which an upper joint shaft 25 is rotatably inserted. This shaft 25 is held from both sides by the side wall of the U-shaped pivot arm 12, and is screwed 27
etc., to the side wall. The lower joint shaft 26 passes through both legs 23 of the lower press fitting 15 and is fixed, thereby forming a U-shape similar to the upper press fitting 14. The joint shaft 26 is connected to the leg portion 23
It is supported in the middle part by a spherical bearing 28, the casing 29 of which is firmly connected to the lid 7.

A toggle lever mechanism is thus formed, and its toggle joint shaft 21 serves as the point of action of the force and control action on the lock pawl 17 and the pull arm 20 for emergency operation. The elements related to this are leg 2
2 and 23 or on the outside in a special manner. That is, the pulling arm 31 (first
Two control strips 30 for operating the lower press fitting 15 are inserted in pairs symmetrically about the center between the legs 23 of the lower press fitting 15. Furthermore, the control strip 3
The eyelet 32 of the piston rod 33 of the hydraulic cylinder 11 is inserted into the center between the two. Both legs 14 and 15 on the toggle joint shaft 21
is surrounded from the outside by both arms of the fork-shaped end 34 of the emergency operating pull arm 20. All these parts are provided inside the side wall of the pivot arm 12, so that even though they are configured to be rotatable on the toggle joint shaft 21, the side surface is fixed in its position. ing.

Next, the operation of the toggle lever joint mechanism and the opening/closing operation of the lid will be explained.

Opening the lid: The lid 7 is movably suspended on a pivoting arm 12.
Two compression springs 16 assist in the lifting action of the lid 7. The lifting action is performed by a reciprocating hydraulic cylinder 11 via toggle lever joints 13, 14, 15.
During the lifting operation, the pawl 17 is unlocked by the pull arm 31 and the pivot arm 12 rests on the projection 35. The pivoting movement by the rotary shaft 37 acts on the toggle joint shaft 21 by means of the tensile force of the hydraulic cylinder 11 and is terminated when the piston reaches the end point of the hydraulic cylinder 11.

Closing the lid: The lid 7 pivots downward due to the pressing force of the hydraulic cylinder 11. The pivot arm 12 rests on the protrusion 35.
The piston rod 33 has toggle lever joints 13, 14,
15 to the left in FIG.
descends downward, and the pull arm 31 fitted into the shaft 36
As a result, the claw 17 is locked with the protrusion 35. At the end of the piston, the lid 7 presses against the filter drum 6, the lid 7 is pressed against the filter housing 1, the toggle lever couplings 13, 14, 15 move beyond the dead center to the right in FIG. will be released. Thereupon, the preparation for operation of this device is completed.

Emergency opening/closing operation of the lid: The lever arm rotating around the shaft 37 is driven by the emergency operating lever 18. This lever arm is mainly connected to the toggle lever joints 13 and 1 by the pull arm 20.
4 and 15 are connected. Emergency operation lever 18
By pivoting, the pull arm 20 acts like a piston rod of the hydraulic cylinder 11, and the lid 7 is opened and closed.

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AB in FIG. 1... Filter housing, 2... Partition,
3... Upper space, 4... Lower space, 5... Communication opening, 6... Filter drum, 7... Lid, 8
... Gas inflow pipe, 9 ... Gas outflow pipe, 10 ... Spring built-in element, 11 ... Water pressure cylinder, 12 ... Lid closing arm (swivel arm), 13 ... Toggle lever joint,
14... Upper press fitting, 15... Lower press fitting,
16... Spring, 17... Claw, 18... Emergency operation lever, 19... Mushroom-shaped handle, 20... Emergency pull arm, 21... Toggle joint shaft, 22... Upper press fitting leg, 23... ...Lower press fitting leg, 24...
Upper press fitting leg, 25... Upper joint shaft, 26...
... lower joint shaft, 27 ... fixing screw, 28 ... spherical bearing, 29 ... casing, 30 ... control band plate,
31...Pulling arm, 32...Piston rod eyelet, 33
...Piston rod, 34...Fork-like end for emergency operation, 35...Protrusion, 36...Shaft, 37...Swivel arm rotation axis.

Claims (1)

[Scope of Claims] 1. A ring-shaped or cylindrical filter drum whose end surface side can be pressed against an opening of a partition wall in a housing formed to divide an inflow chamber and an outflow chamber of the housing, and a filter drum. a pivotable lid for carrying out the exchange, the lid being configured to simultaneously press the filter drum into close contact with the bulkhead opening by pressing against the housing, with the lid and the lid closing arm being connected to each other; A toggle lever mechanism consisting of two pressing fittings is provided between the two for controlling the lock release operation and the suppressing operation. In a filter housing for separating radioactive hazardous substances from a gas flow, the filter housing is actuated by a piston rod of a hydraulic cylinder eccentrically supported by a cylinder. The upper joint shaft 25 is rotatably inserted into the bottom 24 of the press fitting, and both legs 22 of this press fitting are pivotally supported by the toggle joint shaft 21 . Lower press fitting 1 formed by
Both legs 23 of the toggle joint shaft 21 are surrounded by the two legs from the outside on the toggle joint shaft 21, and the lower joint shaft 26 is connected to the lower press fitting 15 by a spherical bearing 28 fixed to the lid 7 by a bearing casing 29. A filter housing for separating radioactive hazardous substances from a gas flow, characterized in that the filter housing is rotatably and partially pivotably supported between both legs 23 of the filter housing. 2. A claw 1 is located on the toggle joint shaft 21 symmetrically with respect to the center between both legs 23 of the lower press fitting 15.
The two control strips 30 for locking and releasing No. 7 are fitted in a pair, and the eyelet 32 of the piston shaft 33 of the cylinder 11 is fitted onto the intermediate shaft 21, and the 2. The filter housing according to claim 1, wherein two arms of the fork-shaped end portion 34 of the emergency operation pull arm 20 are fitted into the filter housing. 3 Upper press fitting 1 with upper joint shaft 25 and other components of toggle lever joint 13
4 is provided inside a lid closing arm, that is, a pivot arm 12 having a U-shaped cross section, and an upper joint shaft 15 is fixed to said arm.
The filter housing according to item 1 or 2.