JPH0523106U - Filter device - Google Patents

Abstract

(57) [Summary] [Structure] The filter device of the present invention comprises an upper body 21 fixed in position, a lower fixed body 24 concentrically fixed to the lower main body 24 at a predetermined distance, and a center hole from the bottom surface. A lower main body 27 slidably and airtightly fitted in the protruding straight pipe portion 30 and facing the upper main body 21, a lever 31 having an intermediate portion pivotally supported by a lower fixed body 24, and one end at one end of this lever. Link 32 that is pin-coupled to the lower body 27 at the other end and the upper body
The filter case 7 is airtightly mounted between the lower body 27 and the lower body 27. [Effect] By moving the lower body by operating the lever,
The filter case can be switched between a state in which the filter case is airtightly mounted between the upper and lower bodies and a state in which the filter case is released from the tightening and can be removed, and the operability of attaching and detaching the filter case is improved. Further, since the outer surface of the filter case does not come into contact with the sample gas, dust in the sample gas does not adhere, and exposure of fingers and the like and deterioration of measurement accuracy are eliminated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a filter device for collecting dust and iodine floating in air sampled in a nuclear power generation facility or the like.

[0002]

[Prior Art]

 A conventional filter device is shown in FIGS. 2 (a), (b) and FIG. As shown in FIGS. 2 (a) and 2 (b), a main body having a cylindrical bottomed pipe-shaped suction port 14 communicating with the inside on the bottom surface and a pipe-shaped dust suction port 15 communicating with the inside on the side surface. By inserting the filter case 7 into 9 and fixing the lid 10 with the tightening band 11, the bottom of the filter case 7 and the inside of the main body 9 are inserted through the elastic pressing metal fitting 16 inserted between the lid 10 and the filter case 7. The structure is such that the gasket 13 arranged on the bottom surface is pressed and the O-ring 12 arranged on the upper end of the main body 7 is pressed.

As shown in FIG. 3, the filter case 7 has a cylindrical shape with a bottom, a large ventilation hole 7a on the bottom surface, and a screw portion 7b on the outer surface of the upper end portion. A lid 8 having a large vent hole is screwed into the upper open end. Inside the filter case 7, the gasket 3, the charcoal cartridge 2, the gasket 3, the charcoal cartridge 2, the gasket 3, the net 4, the filter paper 1, the O-ring 5, and the holding ring 6 are stacked in this order from the bottom. The lid 8 can be screwed and pressed.

In the conventional filter device shown in FIGS. 2 (a) and 2 (b), a suction pump is connected to the suction port 14 and a sampling pipe is connected to the dust suction port 15 to take in the sample gas, and the inside of the filter case 7 is introduced. The filter paper 1 and charcoal cartridge 2 are allowed to flow through and dust is collected.

[0005]

[Problems to be solved by the device]

 The airtightness of the main body 9 is important for correct dust collection. In the conventional filter device, the airtightness depends on the attachment state of the lid 10 and the tightening band 11. The tightening band 11 is of a screw type for secure mounting, but its operability is not good and improvement is desired. In addition, since the entire filter case 7 is housed in the main body 9, dust in the sample gas adheres to the surface of the filter case 7 and adheres to fingers and the like during removal, which causes exposure and lowers measurement accuracy. .

[0006] Therefore, an object of the present invention is to improve the operability of attaching and detaching the filter case and prevent dust from adhering to the surface of the filter case.

[0007]

[Means for Solving the Problems]

 The filter device of the present invention has a disk-shaped center hole, and an O-ring is concentrically attached to the center hole, and a pipe-shaped dust suction port is provided on the other surface so as to communicate with the center hole. The fixed upper body and the cylindrical O-ring mounted on the inner surface of the center hole are concentric with the upper body and are fixed at a predetermined distance from the O-ring mounting surface. A lower fixed body that functions as a suction port and has a protruding portion that protrudes in the radial direction on one side surface of the end facing the upper body, and a disk-shaped center hole that has a center hole on the surface facing the upper body. An O-ring is mounted concentrically with the boss, and a boss is formed on the opposite surface, and a step is formed on the boss to slidably and air-tightly fit a straight pipe portion in the center hole of the lower fixed body. A lower book protruding concentrically with And a lever having an intermediate portion pivotally supported by the protruding portion of the lower fixed body, one end of which is pin-coupled to the end of the lever facing the lower body and the other end of which is pin-coupled to the boss of the lower body. And a cylindrical bottomed vent hole on the bottom, the filter paper and charcoal cartridge are concentrically stacked and stored inside the cylinder, and a lid with a vent hole is attached to the top end. A filter case that is concentrically mounted between the O-ring mounting surface of the upper body and the O-ring mounting surface of the lower body, and is sealed by the O-ring of the lower body moved by the operation of the lever and the O-ring of the upper body. It is a configuration provided with.

[0008]

[Action]

 In the filter device of the present invention, switching between a state in which the filter case is airtightly mounted between the upper body and the lower body and a state in which the filter case can be removed by being tightened by the upper body and the lower body can be performed only by operating the lever. Be done. This improves the operability of attaching and detaching the filter case. Moreover, since the outer surface of the filter case does not touch the sample gas, dust in the sample gas does not adhere, and the deterioration of measurement accuracy due to exposure of fingers and the like and contamination of filter paper and charcoal cartridge is eliminated.

[0009]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

1A and 1B show a filter device according to an embodiment of the present invention. The filter device includes an upper body 21, a lower fixed body 24, a lower body 27, a lever 31, a link 32, and a filter case 7.

The upper main body 21 has a disk shape, and a receiving surface for the lid of the filter case 7 is formed in a concave shape on one surface, and a countersink-shaped central hole 22 having an expanded diameter is formed on the surface. An O-ring 33 is provided concentrically with the center hole 22, and a pipe-shaped dust suction port 23 is provided so as to communicate with the center hole 22 on the surface opposite to the seat surface. The upper body 21 is supported and fixed in position, for example, by a wall.

The lower fixed body 24 has a cylindrical shape that is concentrically spaced apart from the upper main body 21 by a predetermined distance and is fixedly supported by a wall or the like, and has an O-ring 34 mounted on the inner surface of the center hole. The end farther from the upper main body 21 functions as a suction port 25, and a protruding portion 26 protruding in the radial direction is formed on one side surface of the end portion facing the upper main body 21.

The lower main body 27 has a disc shape, and a seating surface for the bottom of the filter case 7 is formed in a concave shape on one surface, and a countersink-shaped central hole 28 having an expanded diameter is formed on the surface. An O-ring 33 is mounted concentrically with the center hole 28, and a boss 29 is formed on the surface opposite to the seating surface, and a step is formed on the boss 29 so that the lower fixing body 24 A straight pipe portion 30 slidably and airtightly fitted in the center hole is provided so as to communicate with the center hole 28 concentrically.

A U-shaped lever 31 is provided on the protrusion 26 of the lower fixed body 24 with its middle portion pivotally supported, and one end of each lever 31 is pin-connected to each end of the lower body 27 facing the lower main body 27. A pair of held links 32 are pin-connected to the bosses 29 of the lower body 27 at their other ends.

The filter case 7 is the same as that of FIG. 3 described in the conventional example, as shown in FIG. 3, it has a cylindrical shape with a bottom, a large ventilation hole 7a on the bottom surface, and a screw portion 7b on the outer surface of the upper end portion. To have. A lid 8 having a large vent hole is screwed into the upper open end. Inside the filter case 7, the gasket 3, the charcoal cartridge 2, the gasket 3, the charcoal cartridge 2, the gasket 3, the net 4, the filter paper 1, the O-ring 5, and the pressing ring 6 are stacked in this order from the bottom. The lid 8 can be screwed and pressed.

To mount the filter case 7, the lever 32 is pushed up as shown by the chain double-dashed line in FIG. 1 (a), so that the link 32 pulls down the lower body 27 and the space between the upper body 21 and the upper body 21 is expanded. . In this state, position the filter case 7 on the lower body 27, and push down the lever 31 to the position shown by the solid line to raise the lower body 27, and the filter case 7 will move to the O-ring 33 of the upper body 21 and the lower body. The lid 8 and the bottom surface are sealed by the O-ring 33 of 27 and are airtightly attached.

In the filter device of one embodiment of the present invention configured as described above, the suction pump pipe-connected to the suction port 25 in the airtightly mounted state of the filter case 7 shown by the solid line in FIG. 1A. When the filter is activated, the sample gas is introduced into the filter device from the desired point through the sampling pipe connected to the dust suction port 23, and is allowed to flow through the filter case 7 into the filter paper 1 and the charcoal cartridge 2 into the sample gas. It can collect floating dust and iodine.

When the filter case 7 is taken out when the collection is completed, the lever 32 is pushed up as shown by the chain double-dashed line so that the link 32 pulls down the lower body 27 and the space between the upper body 21 is expanded. Since the filter case 7 descends together with the lower body 27 and is released from the tightened state, it can be easily taken out.

In the filter device of one embodiment of the present invention, the filter case 7 is airtightly mounted between the upper body 21 and the lower body 27 only by operating the lever, and the filter case 7 is constituted by the upper body 21 and the lower body 27. It is possible to switch from the tightened state to the removable state, which greatly improves the operability of attaching / detaching the filter case 7 as compared with the prior art. Further, since the outer surface of the filter case 7 does not come into contact with the sample gas, dust in the sample gas does not adhere, and the deterioration of measurement accuracy due to exposure of fingers and the like and contamination of filter paper and charcoal cartridge are eliminated.

Although the lower body 27 is moved by using the lever 31 and the link 32 in the embodiment shown in FIGS. 1A and 1B, the rotation of the protrusion 26 serving as the fulcrum of the lever 31 An eccentric cam may be attached and fixed to the shaft, and the lower body 27 may be moved by rotating the eccentric cam with a lever attached and fixed to the rotating shaft.

[0021]

[Effect of the device]

 As described above in detail, according to the present invention, a position-fixed upper body, a cylindrical lower fixing body which is concentrically spaced apart by a predetermined distance, and is position-fixed, and a central hole projecting from the bottom surface thereof. A lower body slidably and airtightly fitted in the straight pipe portion and facing the upper body, a lever having an intermediate portion pivotally supported by the lower fixed body, and one end of which is pin-coupled to one end of the lever. By implementing a filter device that includes a link whose other end is pin-connected to the lower body and a filter case that is airtightly mounted between the upper body and the lower body, By moving the main body, it is possible to switch between the state where the filter case is airtightly mounted between the upper and lower main bodies and the state in which the filter case is removable from the tightening by the upper and lower main bodies. Operation of the attachment and detachment of Rutakesu is improved. Moreover, since the outer surface of the filter case does not come into contact with the sample gas, dust in the sample gas does not adhere, and the deterioration of measurement accuracy due to exposure of fingers and the like and contamination of filter paper and charcoal cartridge is eliminated.

[Brief description of drawings]

1 shows a filter device according to an embodiment of the present invention, and FIG.
1A is a vertical cross-sectional view, and FIG. 1B is A of FIG.
It is an arrow view.

FIG. 2 shows a conventional filter device, FIG. 1 (a) is a plan view, and FIG. 1 (b) is a side view showing a cross section of a main part.

FIG. 3 is a side view showing a cross section of a main part of a filter case of the filter device.

[Explanation of symbols]

 1 ... Filter paper 2 ... Charcoal cartridge 7 ... Filter case 21 ... Upper body 22 ... Center hole 23 ... Dust inlet 24 ... Lower fixed body 25 ... Suction port 26 ... Projection 27 ... Lower body 28 ... Center hole 29 ... Boss 30 ... Straight Pipe 31 ... Lever 32 ... Link

Claims (1)

[Scope of utility model registration request] 1. A disk-shaped central hole having an O-ring attached concentrically with the central hole, and a pipe-shaped dust suction port projecting from the other surface and communicating with the central hole to fix the whole position. The upper body is a cylinder that is concentric with the upper body and is fixed at a predetermined distance from the O-ring mounting surface, and the O-ring is mounted on the inner surface of the central hole and the end far from the upper body is a suction port. And a lower fixing body having a protrusion protruding in the radial direction on one side surface of the end portion facing the upper body, and having a disk-shaped center hole and being concentric with the center hole on the surface facing the upper body. An O-ring is attached and a boss is formed on the opposite surface. A step is formed on the boss, and a straight pipe portion that is slidably and airtightly fitted in the central hole of the lower fixed body is concentric with the central hole. A lower main body that is projected in communication with the lower fixed body A lever whose middle portion is axially supported by the protruding portion of the lever, a link whose one end is pin-coupled to the end of the lever facing the lower body, and the other end is pin-coupled to the boss of the lower body; A cylindrical shape with a ventilation hole in the bottom, filter paper and charcoal cartridges are concentrically stacked inside the cylinder, and a lid with a ventilation hole is attached to the upper end and the O-ring mounting surface of the upper body and the lower body And a filter case that is concentrically mounted between the O-ring mounting surface and the O-ring mounting surface and is sealed by the O-ring of the lower main body and the O-ring of the upper main body moved by the operation of the lever.