JP4269365B2 - Safety device for pressurized containers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a safety device for a pressurized container.
[0002]
[Prior art]
In a pressurized container such as a filter device or a tank in which internal pressure acts, the case and the cover are prevented from being separated by the internal pressure of the container by tightening the outer periphery of the attachment portion between the case and the cover and tightening the band.
However, when the tightening band is removed for inspection or replacement of internal parts, the case and the cover are separated by the internal pressure and the case falls or the cover scatters. It is dangerous for the person.
[0003]
In addition, in a pressurized container with a pipe for supplying and discharging a fluid such as compressed air to the cover, such as a filter device, remove the pipe attached to the case for inspection and replacement of internal parts. Since it is cumbersome, the case is attached to and detached from the cover to which the piping is attached.
However, when the case is attached to or detached from the cover of the filter device, it is difficult to remove the tightening band while preventing the heavy case from falling or to tighten the tightening band while pressing the case toward the cover. For this reason, attaching and detaching the case to / from the cover requires two workers, a person who supports the case and a person who attaches and detaches the tightening band.
[0004]
In order to solve these problems, the pressurized container is provided with a locking means for locking the case and the cover.
6 to 10 show the pressurizing container locking means disclosed in Japanese Patent Application Laid-Open No. 7-328333. The pressurizing container configured as the filter device 1 is attached to the cover 2 and the cover 2. A case 3 that can be attached to the case 3 and a filter element 4 that is attached to the case 3 in a replaceable manner are provided.
The cover 2 has an inverted cup shape, and an inlet tube portion 6 and an outlet tube portion 7 in which a supply pipe and a discharge pipe (not shown) for a fluid to be filtered are screwed into openings in a side wall opened in a diametrical direction. Is attached by welding or the like, and an element attachment portion 8 that opens downward is attached to the outlet tube portion 7 via an adapter 7a.
[0005]
A plurality of, preferably three, protrusions 9 projecting inwardly are formed on the side wall of the cover 2 at equal intervals in the circumferential direction, and near the lower end thereof, taper that inclines downward and outward. 10 is formed.
Further, flat portions 11 and 11 and a vent hole 12 for attachment are formed on the upper wall of the cover 2, and tightening described later in a direction above the taper 10 and perpendicular to the attaching direction of the tube portions 6 and 7. A band mounting bracket 14 for mounting a band (V band in the illustrated example) 13 is mounted (see FIG. 9).
[0006]
The case 3 that opens upward has the same number of substantially L-shaped locking recesses 16 that are open at the top and that are locked with the protrusions 9 inserted into the upper portion of the side wall at equal intervals in the circumferential direction. (See FIG. 6), a bulging portion 17 having a substantially triangular cross section is formed in the circumferential direction below, and a plurality (four in the illustrated example) of finger rests 18 are further formed below the bulging portion. The horizontal portion of each locking recess 16 is slightly inclined downward.
A drain member 20 having a drain port is attached to a cylindrical portion formed at the bottom of the case 3 by an appropriate means such as welding, and a seal that tightly seals between the upper surface of the bulging portion 17 and the cover 2. A ring 21 is fitted.
[0007]
The element holder 23 provided at the bottom of the case 3 has a plurality of holding pieces 23 a that elastically hold the filter element on the periphery, and a spring seat 24 attached to the central portion of the holder 23 and the drain member 20. In the meantime, a spring 25 for biasing the filter element 4 toward the cover 2 is contracted.
Further, a notch-shaped ring 26 is fitted to the bulging portion 17, and a plurality of arc-shaped support pieces 27 that elastically support the axial intermediate portion of the filter element 4 swing on the ring 26. Installed as possible.
[0008]
The filter element 4 is formed in a hollow cylindrical shape from polypropylene fiber or non-woven fabric, and has a cylindrical mounting portion 30 that is closely inserted into the opening of the element mounting portion 8 at the upper end, and the lower end of the hollow portion is closed. Closely closed by the member 31.
[0009]
The band mounting bracket 14 has pin insertion holes 34 and 34 into which the heads of the mounting pins 38 and 38 of the tightening band 13 are loosely inserted, and the heads of the mounting pins 38 and 38 are narrower than this. Circumferential pin locking holes 35, 35 are formed.
The tightening band 13 shown in detail in FIGS. 8 to 10 includes an inverted channel-shaped connecting bracket 37 and tightening members 13a and 13b rotatably mounted on the connecting bracket 37 by mounting pins 38 and 38. These fastening members 13a and 13b having a substantially circular arc shape as viewed are provided with an inverted V-shaped cross section in which both walls that are slightly expanded are engaged with the tapers 10 and 19.
[0010]
A frame body 39 that is loosely fitted to the distal end of the fastening member 13b is rotatably attached to the distal end of the fastening member 13a by a pin 40. The distal end of the fastening member 13b is pressed against the frame body 39 to tighten the fastening band. A screw 41 for tightening 13 is screwed.
When the heads of the mounting pins 38 and 38 are inserted into the pin insertion holes 34 and 34 of the band support bracket 14 and slightly moved in the circumferential direction, the heads of these pins are pinned. It is locked to the holes 35, 35 and attached to the band fitting 14, and can be removed from the band attachment fitting 14 by the opposite operation.
Reference numeral 43 in FIG. 6 is a plug screwed into the vent hole 12 and the drain port of the drain member 20.
[0011]
The cover 2 is fixed by screwing attachment bolts 45, 45 passing through attachment holes of a bracket 44 attached to an appropriate member into spacers 46, 46 attached to the flat portions 11, 11. However, the fixing means of the cover 2 is not limited to this.
[0012]
In the case 3, the upper opening of the locking recess 16 is opposed to the protrusion 9 of the cover 2, and the mounting portion 30 of the filter element 4 is opposed to the opening of the mounting portion 8. When it is rotated in a predetermined direction while being pressed, the projection 9 and the locking recess 16 are locked to attach the case 3 to the cover 2, and the mounting portion 30 of the filter element 4 is in the opening of the element mounting portion 8. The upper surface of the filter element 4 is pressed against the opening edge by the biasing force of the spring 25.
When the case 3 is grasped and rotated in the direction opposite to the above direction, the projection 9 and the locking recess 16 are unlocked by the biasing force of the spring 25, so that the case 3 can be separated from the cover 2.
Therefore, the cover 2 and the case 3 can be locked by the locking recess 16 and the protrusion 9, and the cover 2 and the case 3 can be tightened by the tightening band 13 in this state. 2 and the case 3 can be easily attached and detached.
[0013]
However, the locking of the cover 2 and the case 3 by the projection 9 and the locking recess 16 having the above-described configuration is lacking in consideration of the locking, and the locking recess 16 is substantially L-shaped. The case 3 is locked to the cover 2 even when the rotation of the case 3 is insufficient and the protrusion 9 is not inserted all the way into the locking recess 16.
Even if the cover 2 and the case 3 are not completely locked by the protrusion 9 and the locking recess 16, the outer periphery of the mounting portion of the cover 2 and the case 3 is tightened by the tightening band 13. Even if the internal pressure is applied, the cover 2 and the case 3 are not separated.
[0014]
For this reason, when the engagement between the cover 2 and the case 3 is not complete, or when the engagement between the projection 9 and the engagement recess 16 is loosened for some reason, the inspection and replacement of internal parts are required. When the fastening band 13 is removed, the case 3 may be separated from the cover 2 and fall due to the fluid pressure in the filter device 1.
Since the fall of the case 3 during work such as inspection is dangerous for the operator, in a pressurized container such as a filter device, when the fastening band 13 is removed, the cover 2 and the case 3 are reliably separated by the internal pressure. It is necessary to prevent it.
[0015]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to provide a safety device for a pressurized container capable of reliably locking a case and a cover and preventing separation of these cases due to internal pressure.
[0016]
[Means for Solving the Problems]
To solve the above problem, the safety device of the pressurized vessel of the present invention includes a case where the upper is open, and a cover attached to the opening of the case, both by tightening the outer circumference of the mounting portion between the case and the cover in pressurized container and a band tightening coupling, the upper side wall of the case, to one of the portions overlapping the upper portion of the side wall during installation of the case in the cover, provided with a plurality of locking projections, The other side is provided with a locking groove into which these locking projections are inserted, the locking groove opens at the end of the case or cover provided with the locking projection, and the locking projection is provided when the case and the cover are attached. It is formed in the communicating part of the inclined part that slides to the engaging part that it engages, the horizontal engaging part that finally locks the engaging protrusion, and the inclined part of the engaging part, In the locking part And a locking projection to prevent the escape of the inclined portion of the sealed with the locking projection, the inclined portion, to the extent that leads to the locking portion from the end portion opening, are opposed it locking projection When pressed against each other, the locking projection slides on the inclined portion and is inserted to the locking portion .
[0017]
In order to solve the same problem, the pressurized container is a filter device having a filter element.
[0018]
[Operation and effect of the invention]
When a plurality of locking protrusions provided on either the cover or the case are opposed to the openings of the locking grooves provided on the other of these, and one of them is pressed toward the other, the locking protrusions are locked. The cover and the case are attached by sliding the inclined portion provided in the groove and engaging the engaging portion. When the outer periphery of these attaching portions is tightened by the tightening band, the cover and the case are firmly attached.
In this case, since the inclined portion is provided in the locking groove, the cover and the case are not locked unless the locking protrusion is inserted into the locking portion through the inclined portion of the locking groove. Locking can be prevented.
[0019]
Even if the tightening band is removed while internal pressure is applied to the pressurized container, the locking projection is locked to the locking projection provided on the locking portion, and movement to the inclined portion side is prevented. The separation of the cover and the case due to the internal pressure can be reliably prevented.
Therefore, it is safe to attach and detach the cover and the case in the pressurized container, and these can be attached and detached by one worker.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show the configuration of the main part of a first embodiment of the present invention, and the above-described embodiment constituting the filter device 51 as an example of a pressurized container includes a cover 52 and a case 53. This filter device 51 has the same configuration as the filter device 1 shown in FIGS. 6 to 10 except for a locking projection (pin) 55 and a locking groove 56 that constitute locking means for a cover 52 and a case 53 to be described later. I have.
Accordingly, the same portions in the drawings are denoted by the same reference numerals, and detailed description thereof is omitted.
[0021]
As shown in FIG. 1, an inward pin as an example of a locking projection is provided on the side wall of the cover 52 in a plurality of mounting holes formed at equal intervals in the circumferential direction instead of the projection 9. 55 are each closely attached by welding. However, like the cover 2 of the previously proposed filter device, the locking protrusion can be an inward protrusion.
On the other hand, the same number of the locking grooves 56 as the pins 55 formed at equal intervals in the circumferential direction on the upper portion of the case 53 are connected to the inclined portions 57 opened at the upper end of the case 53 and the pins 55 continuously therewith. Prevention of slipping out of the locking portion 58 of the pin 55 locked to the locking portion 58 formed at the upper edge of the communication portion between the horizontal locking portion 58 to be stopped and the inclined portion 57 of the locking portion 58. And a downwardly protruding locking projection 59.
[0022]
In the first embodiment, when the upper end opening of the locking groove 56 provided in the case 53 is pressed upward while facing the pin 55 provided in the cover 52, the pin 55 is inclined to the inclined portion 57 of the locking groove 56. , And the case 53 is attached to the cover 52.
In this case, since the pin 55 slides on the inclined portion 57 of the locking groove 56 and is inserted into the locking portion 58, the case 53 is locked to the cover 52 unless the pin 55 is locked to the locking portion 58. Therefore, the cover 52 and the case 53 are securely attached by the pin 55 and the locking groove 56.
After the case 53 is attached to the cover 52 by the locking of the pin 55 to the locking groove 56, the tightening band 13 is tightened around the outer periphery of the tapers 10 and 19 in the same manner as the previously proposed filter device 1.
[0023]
When the case 53 is separated from the cover 52 for inspection or replacement of internal parts such as the filter element 4, etc., when the fastening band 13 is removed, fluid pressure such as air pressure is applied to the filter device 51. In addition to the biasing force of the spring 25, a force in the direction of separating the cover 52 and the case 53 by the internal pressure acts, but the pin 55 is formed at the upper edge of the communicating portion with the inclined portion 57 of the locking portion 58. This prevents the pin 55 from coming out of the locking portion 58, so that the cover 52 and the case 53 can be separated by the action of internal pressure or the like even if the fastening band 13 is removed. It can be surely prevented.
Therefore, the case 53 can be attached to and detached from the cover 52 by a single operator as in the proposed filter device 1, and the operation is safe.
[0024]
The filter device 51 and the tightening band 13 are not limited to those shown in the drawings except for locking by the pin 55 and the locking groove 56.
[0025]
3 to 5 show a second embodiment of the present invention, and the illustrated embodiment constituting the tank 61 as an example of a pressurizing device includes a case 63 and a cover 62 attached to the opening of the case 63. I have.
The case 63 includes a cylindrical body plate 65 and a bottom plate 66 attached by welding near the lower end thereof, and these members are formed of a steel plate having an appropriate thickness. Further, the opening of the body plate 65 is an inclined surface 65a that is inclined upward and outward, and in the diametrical direction below it, as in the first embodiment, the mounting holes and these mounting holes are densely welded. A plurality of (two in the illustrated example) inward pins 55 constituting the locking projections are provided.
[0026]
The heavy cover 62 formed of a casting is provided with an annular packing mounting groove 68 and a packing locking edge 69 below the periphery of the cover 62, and seals the case 63 by pressing the packing mounting groove 68 against the inclined surface 65a. A ring 70 is fitted, and two handles 71 are provided on the upper surface.
Further, a ring member 72 to be inserted into the case 63 is integrally provided below the inner side of the packing mounting groove 68, and the same number of locking grooves 74 as the pins 55 are provided on the ring member 72 in the circumferential direction. It is formed at equal intervals.
[0027]
As shown in detail in FIG. 5, the locking groove 74 includes an upward inclined portion 75 that opens at the lower end of the ring member 72, a horizontal locking portion 76 that is continuously locked by the pin 55, and An upward locking projection 77 formed at the lower edge of the communication portion between the locking portion 76 and the inclined portion 75 to prevent the pin 55 locked to the locking portion 76 from coming out of the locking portion 76. And.
Further, the fastening band 79 for fastening the cover 62 and the case 63 is configured as a base end of a pair of fastening members pivoted by appropriate means such as a pin.
Reference numeral 80 in FIG. 3 is an inspection hole for inserting a thermometer or the like, and is closed by a plug (not shown) when not in use.
[0028]
In the second embodiment, when the cover 62 is moved downward with the opening of the locking groove 74 provided in the ring member 72 of the cover 62 opposed to the pin 55 provided in the case 63, the pin 55 is lowered by its own weight. The mounting portion between the cover 62 and the case 63 is pressed against the inclined surface 65 a of the body plate 65 of the case 63. Sealed.
Next, the air tank 61 is assembled by tightening the tightening band 79 around the outer periphery of the attachment portion of the case 63 and the cover 62.
Since other functions and effects of the second embodiment are substantially the same as those of the first embodiment, detailed description thereof is omitted.
[Brief description of the drawings]
FIG. 1 is an enlarged view of a main part of a first embodiment.
FIG. 2 is a longitudinal side view of the same.
FIG. 3 is a half longitudinal sectional front view of a second embodiment.
FIG. 4 is a longitudinal sectional view of the cover.
FIG. 5 is an enlarged cross-sectional view of the main part.
FIG. 6 is a longitudinal side view of a previously proposed filter device.
FIG. 7 is a front view of the main part of the same.
FIG. 8 is a plan view of a state where a cover is attached.
FIG. 9 is a front view of a main part provided with a tightening band.
10 is a plan view of the main part of FIG. 9;
[Explanation of symbols]
4 Filter elements 13, 79 Clamping band 51 Filter device 52, 62 Cover 53, 63 Case 55 Pin 56, 74 Locking groove 57, 75 Inclined part 58, 76 Locking part 59, 77 Locking protrusion 61 Tank

Claims (2)

A case top is open, and a cover attached to the opening of the case, in a pressurized container and a band tightening connecting both tighten the outer periphery of the mounting portion between the case and the cover,
A plurality of locking protrusions are provided on one of the upper side wall of the case and a portion of the cover that overlaps the upper side wall when the case is attached , and the other locking protrusion is inserted into the other. Providing a groove,
The locking groove opens at an end of a case or cover provided with the inclined groove, and the locking protrusion slides to a locking portion to which the locking protrusion is locked when the case and the cover are attached , and the engagement The locking projection formed in the communicating portion between the locking portion in the horizontal direction for finally locking the locking projection and the inclined portion of the locking portion, and coming out to the inclined portion of the locking projection locked to the locking portion and a locking projection for preventing,
When the inclined portion is pressed against each other in the range from the end opening to the locking portion, the locking projection slides on the inclined portion to the locking portion. Supposed to be inserted,
A safety device for a pressurized container. The pressurized container was a filter device having a filter element.
The safety device for a pressurized container according to claim 1.

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