JP2017136575A - Box type filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a box type filter device undisconnected from a pipe, without sliding a sleeve, even when receiving vibration such as an earthquake.SOLUTION: In a box type filter device 1, in a sleeve 70 inserted into a housing nozzle 30, at least one ball plunger 72 projects outward in the radial direction to an end part 70b on the opposite side of an end part 70a inserted into the housing nozzle 30, and in a piping nozzle 50 for inserting the sleeve 70, a groove 53 for passing the ball plunger 72 is formed toward the circumferential direction on an inner surface of the piping nozzle 50, and a latch 54 for shallowing the depth of the groove 53 is formed on one end 53a side of the groove 53 formed in the circumferential direction, and a groove 52 for passing the ball plunger 72 is formed in the direction for separating from the end 50a for inserting the sleeve 70 from the other end 53b of the groove 53 formed in the circumferential direction.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a box-type filter device in which a sleeve provided between connection pipes for filter replacement does not come off from the pipes even during an earthquake.

  From the viewpoint of removing radioactive particles generated during the manufacturing and reprocessing processes of fuel rods used in nuclear power plants and protecting the surrounding environment, particle removal filter devices are used. Since the particle removal filter from which radioactive particles have been removed has a higher dose due to the collected radioactive particles, the filter itself can be a contaminant. Therefore, a box-type filter device having a sealed exchange type structure called a self-contained type is used as a filter for removing radioactive particles. However, during filter replacement work, radioactive contaminants may be scattered from the filter or piping connected to the filter to the periphery. Therefore, in the box-type filter device, it is required that the filter can be replaced while being sealed. In such a filter device, the filter is exchanged while being sealed with a plastic bag (see, for example, Patent Document 1).

  In the invention disclosed in Patent Literature 1, the filter 2 replacement bag mounting port 6 is provided on the side of the housing 1 of the filter 2, the bag 5 is mounted on the bag mounting port 6, and the bag mounting port 6 is opened from the opening. Replace filter 2.

  In the box-type filter device, a type that is connected to a pipe via a slide sleeve (hereinafter simply referred to as “sleeve”) has been used. The sleeve is positioned between the filter housing and the pipe and slides so as to be accommodated in the pipe. The space between the filter housing and the pipe is sealed with a plastic bag covering the sleeve. The sleeve retains the shape so that the plastic bag that becomes the pressure boundary during operation does not deflate in the negative pressure in the tube, and secures the flow path. At the time of filter replacement, the sleeve is stored in the pipe, and at both ends of the filter, the plastic bag attached covering the sleeve between the filter housing and the pipe is welded in the circumferential direction, and cut at the welded place, Seal the filter housing and piping, perform containment to prevent leakage of contaminants, and replace the filter. This containment filter replacement is used not only for radioactive contaminants but also for contaminant filters that need to be prevented from being released into the atmosphere, such as asbestos.

Japanese Patent Publication No. 7-63576

  In the box-type filter device using the sleeve as described above, the sleeve is used for maintaining the shape of the plastic bag in the negative pressure pipe, and moves freely with respect to the pipe without being fixed. Therefore, there is a possibility of disconnecting from the piping due to vibration such as an earthquake. In order to easily move the sleeve into the pipe, there is a gap of about 1.5 to 2.0 mm between the inner side of the pipe and the outer periphery of the sleeve, and it does not function as a pressure boundary.

  Therefore, an object of the present invention is to provide a box-type filter device in which a sleeve does not slide and does not come off a pipe even when subjected to vibration such as an earthquake. It is another object of the present invention to provide a box-type filter device having a sleeve that functions as a pressure boundary.

  In order to solve the above problems, the box-type filter device according to the first aspect of the present invention is a hollow housing 10 that is fixedly installed, for example, as shown in FIGS. A housing 10 having a housing nozzle 30 for introducing gas or discharging a filtered gas, a filter 12 disposed in the housing 10, and a sleeve 70 inserted into the housing nozzle 30, and inserted into the housing nozzle 30. A sleeve 70 in which at least one ball plunger 72 projects radially outward at an end portion 70b opposite to the end portion 70a, and a piping nozzle 50 into which the sleeve 70 is inserted. A groove 53 through which the jar 72 passes is formed on the inner surface of the pipe nozzle 50 in the circumferential direction, and the groove 53 formed in the circumferential direction. A latch 54 for reducing the depth of the groove 53 is formed on the one end 53a side, and the sleeve 70 is rotated with respect to the piping nozzle 50 until the ball plunger 72 exceeds the latch 54, whereby the ball plunger 72 is connected to the latch 54. The circumferential rotation of the sleeve 70 with respect to the pipe nozzle 50 is prevented by being sandwiched between one end 53a of the groove, and the ball is away from the end 50a into which the sleeve 70 is inserted from the other end 53b of the groove 53 formed in the circumferential direction. And a piping nozzle 50 in which a groove 52 through which the plunger 72 passes is formed.

  If comprised in this way, since the ball plunger of a sleeve enters the groove | channel of a piping nozzle and is pinched | interposed by a latch and one end of a groove | channel, since a sleeve does not move with respect to a piping nozzle, a sleeve can be fixed. That is, even if it vibrates due to an earthquake or the like, the sleeve does not slide and does not come off the piping nozzle or piping. Also, when replacing the filter, the sleeve is rotated with such a force that the ball plunger can pass over the latch, and then the sleeve is placed on the piping nozzle side so that the ball plunger passes through the groove away from the end where the sleeve is inserted. The sleeve can be accommodated in the piping nozzle and the filter can be exchanged.

  In order to solve the above-described problem, a box-type filter device according to a second aspect of the present invention is a hollow housing that is fixedly installed, and is a housing nozzle that introduces a filtered gas or discharges a filtered gas A filter disposed in the housing, a sleeve inserted into the housing nozzle, and a piping nozzle into which the sleeve is inserted, wherein at least one ball plunger is provided at an end portion into which the sleeve is inserted. A pipe nozzle that protrudes inward in the radial direction, and the sleeve is formed with a groove through which a ball plunger protruding from the pipe nozzle passes in a circumferential direction on the outer surface of the sleeve. A latch for reducing the depth of the groove is formed on one end side of the groove, and the ball plunger of the piping nozzle passes the latch over the sleeve. The ball plunger is sandwiched between the latch and one end of the groove to prevent the sleeve from rotating in the circumferential direction with respect to the pipe nozzle. A groove through which the ball plunger passes is formed in a direction away from the end inserted into the piping nozzle from the other end of the groove.

  Thus, even if the ball plunger is formed on the inner surface of the piping nozzle and the groove through which the ball plunger passes is formed on the outer periphery of the sleeve, the same operation as that of the first aspect can be realized.

  For example, as shown in FIG. 1, the box-type filter device according to the third aspect of the present invention is an inlet housing nozzle that introduces gas to be filtered by the housing 10 in the box-type filter device 1 of the first or second aspect. 20 and an outlet housing nozzle 30 for discharging filtered gas, the sleeve being an inlet sleeve 60 inserted into the inlet housing nozzle 20 and the sleeve being inserted into the outlet housing nozzle 30 The outlet sleeve 70, the piping nozzle, the inlet piping nozzle 40 into which the inlet sleeve 60 is inserted, and the outlet piping nozzle 50, which is the piping nozzle and into which the outlet sleeve 70 is inserted, are provided.

  If comprised in this way, it becomes a box-type filter apparatus which can accommodate a sleeve in a piping nozzle at the time of filter replacement | exchange at the inlet side of a filtration gas, or an outlet side, and the sleeve was fixed.

  For example, as shown in FIGS. 2 and 3, the box-type filter device according to the fourth aspect of the present invention has a sleeve 70 inserted into the housing nozzle 30 in the box-type filter device 1 of the first or second aspect. Seal members 76 and 56 are further provided at the end portion 70 a and the end portion 70 b inserted into the piping nozzle 50.

  If comprised in this way, since a sealing member is provided between a sleeve and a housing nozzle and between a sleeve and a piping nozzle, between a sleeve becomes airtight and a sleeve functions as a pressure boundary.

  The box-type filter device according to the fifth aspect of the present invention includes an end 71 a into which the sleeve 71 is inserted into the housing nozzle 31 and an end 71 b into which the pipe nozzle 51 is inserted, as shown in FIGS. The housing nozzle 31 has a recess 31c that fits with the projection 71c, the piping nozzle 51 has a recess 51c that fits with the projection 71c, and the projection 71c and the recesses 31c, 51c. To form a seal.

  With this configuration, the convex portion and the concave portion are fitted to form a seal between the sleeve and the housing nozzle and between the sleeve and the piping nozzle, thereby forming a seal between the sleeve and the sleeve functioning as a pressure boundary. To do.

  According to the present invention, since the ball plunger of the sleeve enters the groove of the piping nozzle and is sandwiched between the latch and one end of the groove, the sleeve does not move relative to the piping nozzle. A box-type filter device that does not slide and does not come off the piping can be provided.

  Also, a seal member is provided between the sleeve and the housing nozzle and between the sleeve and the piping nozzle, or the convex portion and the concave portion are fitted between the sleeve and the housing nozzle and between the sleeve and the piping nozzle to form a seal. Therefore, it is possible to provide a box-type filter device having a sleeve that functions as a pressure boundary.

FIG. 1 is a side view showing a box-type filter device as one embodiment of the present invention. FIG. 2 is a side view showing a sleeve of the box-type filter device shown in FIG. FIG. 3 is a side view showing a piping nozzle of the box-type filter device shown in FIG. 1, and shows one groove through. FIG. 4 is a cross-sectional view showing a state in which the sleeve of the box-type filter device shown in FIG. 1 is inserted into the piping nozzle. FIG. 5 is a side view showing a housing nozzle different from that in FIG. FIG. 6 is a side view showing a pipe nozzle different from that shown in FIG. FIG. 7 is a side view showing a sleeve different from FIG. 8a to 8c are diagrams for illustrating a filter replacement procedure. FIG. 8a shows the sleeve being housed in the piping nozzle. FIG. 8b shows the plastic bag being welded and cut. FIG. 8c shows the housing and filter sealed and replaced with a new housing filter.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or corresponding devices are denoted by the same reference numerals, and redundant description is omitted. FIG. 1 shows a side view of a box-type filter device 1 as an embodiment of the present invention. The gas to be filtered flows from the left side to the right side in FIG. 1 as indicated by arrows.

  The box-type filter device 1 includes a housing 10 having an inlet housing nozzle 20 and an outlet housing nozzle 30, a filter 12 housed in the housing 10, an inlet pipe nozzle 40 connected to an upstream pipe, and a downstream side. An outlet pipe nozzle 50 connected to the pipe, an inlet sleeve 60 installed between the inlet housing nozzle 20 and the inlet pipe nozzle 40, and an outlet sleeve 70 installed between the outlet housing nozzle 30 and the outlet pipe nozzle 50. With.

  The housing 10 is a hollow container and has a rectangular parallelepiped shape. In addition, the shape of the housing 10 is not limited to a rectangular parallelepiped, and is arbitrary such as a cylindrical body or an elliptic cylinder base. Regardless of the shape of the housing 10, the type of filter in which the filter 12 is sealed with the housing 10 is referred to as a box-type filter device 1. The housing 10 is fixed to a frame (not shown) with a bolt or the like via the bracket 14. A filter 12 is disposed inside the housing 10. Since the filter 12 may be a known filter, detailed description thereof is omitted.

  The housing 10 has an inlet housing nozzle 20 for introducing a gas to be filtered into the housing 10 and an outlet housing nozzle 30 for discharging the filtered gas from the housing 10. The inlet housing nozzle 20 and the outlet housing nozzle 30 typically have the same structure and are installed on opposite sides of the housing 10. Here, the outlet housing nozzle 30 will be described. The name “housing nozzle” means either the inlet housing nozzle 20 or the outlet housing nozzle 30.

  The outlet housing nozzle 30 is a cylindrical nozzle. A rubber ring groove 32 is formed on the outer periphery of the outlet housing nozzle 30 on the front end side (right side in FIG. 1). A plurality of grooves 32 for rubber rings may be formed side by side. The groove 32 is formed between the outlet housing nozzle 30 and the outlet vinyl bag 90 by attaching a sealing outlet vinyl bag 90 to the outlet housing nozzle 30 and fitting a rubber ring from the outside in the filter replacement procedure described later. Used for airtightness. The inner surface of the outlet housing nozzle 30 is preferably finished to be smooth and easily kept airtight by an O-ring 76 (see FIG. 2) attached to the outlet sleeve 70 described later. For example, airtightness can be maintained under pressure of 1000 to 1500 Pa or under reduced pressure.

  Next, the outlet sleeve 70 will be described with reference to FIG. In addition, since the inlet sleeve 60 has the same structure, the overlapping description is omitted. The name “sleeve” means either the inlet sleeve 60 or the outlet sleeve 70. FIG. 2 is a side view of the outlet sleeve 70. The outlet sleeve 70 is a cylindrical sleeve. The outer diameter of the outlet sleeve 70 is smaller than the inner diameter of the outlet housing nozzle 30 and the inner diameter of the outlet pipe nozzle 50, for example, 0.5 to 2.0 mm smaller so as to be easily slid. Therefore, the outer diameter of the end portion 70a inserted into the outlet housing nozzle 30 and the end portion 70b opposite to the end portion 70a inserted into the outlet housing nozzle 30, that is, the end portion 70b inserted into the outlet pipe nozzle 50 are slightly different. It is made large and it is made easy to keep airtightness with the inner surface of the outlet housing nozzle 30 and the inner surface of the outlet piping nozzle 50. A groove 74 for mounting an O-ring 76 as a seal member is formed on the outer periphery of the end portion 70a. The outer surface of the end portion 70b is preferably finished smoothly, and is preferably kept airtight by an O-ring 56 (see FIG. 3) attached to the outlet pipe nozzle 50 described later. Further, the end portion 70b is provided with a ball plunger 72 so as to protrude outward in the radial direction. The ball plunger 72 may be a known ball plunger that retracts when the protruding portion is pressed and returns to its original height when the pressing force is lost. The protruding portion is generally formed in a round shape, but the shape is not limited. The number of ball plungers 72 may be one or more, and typically includes three ball plungers 72 at equal intervals (center angle 120 °).

  The outlet piping nozzle 50 will be described with reference to FIG. In addition, since the inlet piping nozzle 40 is also the same structure, the overlapping description is abbreviate | omitted. The name “pipe nozzle” means either the inlet pipe nozzle 40 or the outlet pipe nozzle 50. FIG. 3 is a side view of the outlet piping nozzle 50 and shows through one of the grooves 52 and 53 through which the ball plunger 72 passes. The outlet piping nozzle 50 is a cylindrical nozzle. A flange 59 is formed at one end of the outlet pipe nozzle 50 and is fixed to a pipe (not shown) through which the filtered gas flows. The piping is fixed by a stand or the like, and thus the outlet piping nozzle 50 is also fixed immovably. A rubber ring groove 58 is formed on the tip of the outlet pipe nozzle 50, that is, on the outer periphery on the end 50a side (left side in FIG. 3) into which the outlet sleeve 70 is inserted. A plurality of rubber ring grooves 58 may be formed side by side. The groove 58 is formed by attaching a sealing outlet vinyl bag 90 to the outlet pipe nozzle 50 and fitting a rubber ring from the outside in the filter replacement procedure described later, and between the outlet pipe nozzle 50 and the outlet vinyl bag 90. Used for airtightness. On the inner surface of the outlet pipe nozzle 50, an O-ring 56 as a seal member that is in airtight contact with the end portion 70b of the outlet sleeve 70 is attached.

  Grooves 52 and 53 through which the ball plunger 72 passes are formed on the inner surface of the outlet pipe nozzle 50. The groove 53 is formed in the circumferential direction. A latch 54 for reducing the depth of the groove 53 is formed on the end 53 a side of the groove 53. That is, the latch 54 is a convex portion formed at the bottom of the groove 53. The interval between the latch 54 and the one end 53a is an interval at which the ball plunger 72 is fitted and becomes difficult to move. The position of the groove 53 in the longitudinal direction is a position closer to the flange 59 (right side in FIG. 3) than the O-ring 56 attached to the inner surface of the outlet pipe nozzle 50, but closer to the tip 50a (left side in FIG. 3). Is preferred. The other end 53 b of the groove 53 is connected to the groove 52. The groove 52 is formed from the other end 53 b of the groove 53 toward the flange 59. The groove 53 may not be parallel to the axis, or may not be a straight line. The groove 53 is preferably formed up to the end on the flange 59 side. This is because the outlet sleeve 70 having the ball plunger 72 can be easily assembled to the outlet pipe nozzle 50. The grooves 52 and 53 have such a width and depth that the ball plunger 72 can pass through without looseness and without detaching from the grooves 52 and 53.

  Next, a method of fixing the outlet sleeve 70 to the outlet pipe nozzle 50 and storing it will be described. It is the same method that the inlet sleeve 60 is fixed to the inlet piping nozzle 40 and stored. In order to fix the outlet sleeve 70 to the outlet pipe nozzle 50, first, the outlet sleeve 70 is pulled out from the outlet pipe nozzle 50 in the direction of the tip 50a (left side in FIG. 3) so that the ball plunger 72 passes through the groove 52. When the ball plunger 72 hits the end of the groove 52, that is, the groove 53, the outlet sleeve 70 can no longer be pulled out.

  FIG. 4 is a cross-sectional view showing a state where the ball plunger 72 hits the groove 53. From this state, the outlet sleeve 70 is rotated in the circumferential direction with respect to the outlet pipe nozzle 50. In the example of FIG. 4, the outlet sleeve 70 is rotated clockwise so that the ball plunger 72 passes through the groove 53. Then, the ball plunger 72 passes through the latch 54, hits one end 53a of the groove 53, and can no longer turn the outlet sleeve 70. This position is a position where the outlet sleeve 70 is fixed to the outlet pipe nozzle 50. That is, the ball plunger 72 is sandwiched between the latch 54 and the one end 53a and cannot be rotated in the circumferential direction, and the ball plunger 72 cannot be displaced from the groove 53, and therefore does not move in the longitudinal direction. . In this way, by fixing the outlet sleeve 70 to the outlet pipe nozzle 50, the outlet sleeve 70 is fixed to a pipe (not shown) fixed to a gantry or the like even if vibration occurs due to an earthquake or the like. Since it is fixed to the outlet pipe nozzle 50, it does not move. The latch 54 is used to reduce the depth of the groove 53. The latch 54 is lower than the depth of the groove 53. If a large force is applied, the ball plunger 72 is retracted by that amount and passed. Even if an external force is applied to the box-type filter device 1 due to an earthquake or the like, the housing is fixed to the gantry, the outlet pipe nozzle 50 is fixed to the pipe, and a large force is required to rotate the outlet sleeve 70 in the axial direction. Never happen. Therefore, the outlet sleeve 70 is prevented from moving.

  Next, a method for accommodating the outlet sleeve 70 in the outlet piping nozzle 50 when replacing the filter will be described. In order to store the outlet sleeve 70 in the outlet piping nozzle 50, first, the outlet sleeve 70 is rotated in the circumferential direction with respect to the outlet piping nozzle 50. In the example of FIG. 4, the outlet sleeve 70 is rotated counterclockwise so that the ball plunger 72 passes through the groove 53. Then, the ball plunger 72 passes through the latch 54, hits the other end 53b of the groove 53, and can no longer turn the outlet sleeve 70. That is, the state shown in FIG. 4 is obtained. From this position, the outlet sleeve 70 is inserted deeply into the outlet piping nozzle 50 so that the ball plunger 72 passes through the groove 52. When there is a sufficient gap between the outlet sleeve 70 and the outlet housing nozzle 30 to replace the filter, the movement of the outlet sleeve 70 is completed. As described above, in the box-type filter device 1 of the present invention, the sleeves 60 and 70 are fixed to the piping nozzles 40 and 50 except when the filter is replaced. The sleeves 60 and 70 do not move and the sleeves 60 and 70 are not detached from the pipe nozzles 40 and 50 or the pipes. When replacing the filter, the sleeves 60 and 70 are easily accommodated in the pipe nozzles 40 and 50 and between the housing nozzles 20 and 30. A gap can be provided.

  O-rings 76 and 56 are hermetically sealed between the outlet housing nozzle 30 and the outlet sleeve 70 and between the outlet sleeve 70 and the outlet pipe nozzle 50. Therefore, the outlet sleeve 70 functions as a pressure boundary. Similarly, the inlet sleeve 60 functions as a pressure boundary. Therefore, it is not necessary to connect the housing nozzle and the piping nozzle in an airtight manner with a plastic bag that has been used in a conventional box-type filter device. As will be described later, the plastic bag is used for filter replacement. However, since the sleeves 60 and 70 function as pressure boundaries except when the filter is replaced, for example, even when a small part or the like flies and collides during an earthquake. The gas to be filtered can be prevented from flowing out. Therefore, the reliability as a pressure boundary is remarkably increased.

  The movement of the outlet sleeve 70 may cause damage to the O-rings 76 and 56, and it is expected that the O-rings 76 and 56 need to be replaced. In order to replace the O-rings 76 and 56, the O-ring 56 is attached to the groove 56 before the outlet sleeve 70 is assembled to the outlet pipe nozzle 50, and the outlet sleeve 70 is assembled to the outlet pipe nozzle 50 and pulled out. An O-ring 76 is attached to 74. When the O-rings 76 and 56 are mounted in this way, it is preferable because the mounting becomes easy. The O-ring 76 may be mounted on the inner surface of the housing nozzle, and the mounting method is not limited to the above method. Further, as long as it is a seal member that can keep confidentiality, it is not limited to an O-ring, and a metal ring, a rubber ring with cloth, or the like may be used.

  Next, a configuration in which a seal is formed between the sleeve, the housing nozzle, and the piping nozzle without using a seal member will be described with reference to FIGS. Since the other structure is the same as that of the box-type filter apparatus 1 shown in FIGS. Although only the outlet side will be described, the same applies to the inlet side. FIG. 5 is a side view of the outlet housing nozzle 31 in which a circumferential recess 31c is formed on the inner surface, and the inner recess 31c is also seen through. FIG. 6 is a side view of the outlet pipe nozzle 51 in which a circumferential recess 51c is formed on the inner surface, and also shows the recess 51c on the inner surface. FIG. 7 is a side view of the outlet sleeve 71 in which convex portions 71c in the circumferential direction are formed on the outer peripheral surfaces of the one end portion 71a and the other end portion 71b. The convex portion 71c of the outlet sleeve 71 is formed so as to fit the concave portion 31c and the concave portion 51c or slightly larger than the concave portion 31c, and the convex portion 71c is formed of, for example, a thin plate and is elastically recessed. Is done. The outlet sleeve 71 is inserted into the outlet housing nozzle 31, and the convex portion 71c is fitted into the concave portion 31c to form a seal. Further, the seal is formed by inserting the outlet sleeve 71 into the outlet pipe nozzle 51 and fitting the convex portion 71c into the concave portion 51c. Therefore, the outlet sleeve 71 functions as a pressure boundary like the outlet sleeve 70.

  In the box-type filter device 1, it is also possible to use a plastic bag as a pressure boundary as in the prior art without using a seal member. Even in this case, even when subjected to vibration such as an earthquake, there is an advantage that the sleeve does not move and does not come off the pipe.

  In the above description, the ball plunger is installed on the outer periphery of the sleeve and the groove through which the ball plunger passes is formed on the inner surface of the piping nozzle. However, the ball plunger is installed on the inner surface of the piping nozzle, Even if the groove through which the plunger passes is formed on the outer periphery of the sleeve, the same effect can be obtained.

  In the above description, the housing nozzle, the piping nozzle, and the sleeve according to the present invention are used on the inlet side and the outlet side of the box-type filter device 1. However, according to the present invention only on one of the inlet side and the outlet side. A housing nozzle, a piping nozzle, and a sleeve may be used. That is, the housing nozzle and the pipe may be directly connected by the flange without using the sleeve on the other side.

  Next, an example of a procedure for replacing the filter 12 of the box-type filter device 1 will be described with reference to FIGS. 8a to 8c. Here, the description will be made using the housing nozzle 30, the piping nozzle 50 and the sleeve 70 on the outlet side, but the same applies to the housing nozzle 31, the piping nozzle 51 and the sleeve 71, and the same applies to the inlet side. As shown in FIG. 8 a, the outlet vinyl bag 90 is placed over the outlet housing nozzle 30. By fitting the rubber ring 93 into the rubber ring groove 32 (see FIG. 1) with the outlet plastic bag 90 interposed therebetween, the space between the outlet housing nozzle 30 and the rubber ring 93 is sealed. Similarly, the outlet plastic bag 90 is put on the outlet pipe nozzle 50, and the rubber ring 95 is fitted into the rubber ring groove 58 (see FIG. 3) with the outlet plastic bag 90 interposed therebetween, so Seal the gap. Here, in the box-type filter device 1, the plastic bag 90 is required only when the filter is replaced. Therefore, the outlet plastic bag 90 surrounds, for example, the vinyl sheet around the outlet housing nozzle 30, the outlet piping nozzle 50, and the outlet sleeve 70. Thus, it may be formed in a tubular shape and welded in the longitudinal direction. The outlet plastic bag 90 is preferably formed with a glove 90a convenient for moving the outlet sleeve 70 by hand. The rubber rings 93 and 95 are not limited to rubber, and may be formed of a polymer material having elasticity such as polyvinyl chloride or other elastic materials.

  A hand is put in the glove 90a, and the exit sleeve 70 is rotated around the axis. When the ball plunger 72 (see FIG. 2) passes through the groove 53 (see FIG. 3) and passes over the latch 54 (see FIG. 3) and hits the groove end 53b (see FIG. 3), the rotation stops. A groove 52 (see FIG. 3) through which the ball plunger 72 passes is formed from an end 53b of the groove. The outlet sleeve 70 is moved into the outlet pipe nozzle 50 so that the ball plunger 72 passes through the groove 52. Thereby, a gap is formed between the outlet housing nozzle 30 and the outlet sleeve 70.

  As shown in FIG. 8b, at the position of the gap between the outlet pipe nozzle 30 and the outlet sleeve 70, the plastic bag 90 is welded at three locations, and the space on the outlet housing nozzle 30 side and the outlet pipe nozzle 50 (the outlet sleeve 70) are welded. ) Shut off the side space. In FIG. 8b, the welded portion is indicated by the hatched portion. The plastic bag 90 is cut at the central welded portion of the three welds. Therefore, the outlet housing nozzle 30 side, that is, the filter 12 side and the outlet piping nozzle 50 side are sealed and separated. It should be noted that welding is not limited to three places, but two places may be welded, and the gap between them may be cut, or one place may be welded wide, and the filter 12 side and the outlet pipe nozzle 50 side may be What is necessary is just to isolate | separate after sealing each.

  As shown in FIG. 8c, the inlet plastic bag 80 is similarly separated after the filter 12 side and the inlet piping nozzle 40 side are sealed. Therefore, the housing 10 and the filter 12 are sealed. Then, the bolt which fixes the housing 10 to a mount via the bracket 14 (refer FIG. 1) is removed, and the sealed housing 10 and the filter 12 are removed. And the new housing 10-1 and filter 12-1 which covered the inlet housing nozzle 20 and the outlet housing nozzle 30 with the vinyl bags 81 and 91 are attached to a mount frame. The inlet sleeve 60 and the outlet sleeve 70 are inserted into the inlet housing nozzle 20 and the outlet housing nozzle 30 of the new housing 10-1 without releasing the gas in the inlet piping nozzle 40 and the outlet piping nozzle 50 to the atmosphere. Since the procedure for connecting the inlet piping nozzle 40 and the outlet piping nozzle 50 to the housing 10 is known, the description thereof is omitted.

  The filter replacement method is not limited to the above method. When the box-type filter device 1 is used for collecting indoor air, the housing 10 and the filter 12 may be exchanged by sliding the sleeves 60 and 70 without sealing with a plastic bag or the like.

  According to the box-type filter device of the present invention, the ball plunger passes through the groove, so that it is easy to insert the sleeve into the housing nozzle by a predetermined length. Further, the ball plunger can be easily positioned at a predetermined position where it is difficult to move (between the latch 54 and the groove end 53a).

DESCRIPTION OF SYMBOLS 1 Box type filter apparatus 10, 10-1 Housing 12, 12-1 Filter 14 Bracket 20 Inlet housing nozzle 30, 31 Outlet housing nozzle 31c Recess 32 Rubber ring groove 40 Inlet piping nozzle 50, 51 Outlet piping nozzle 50a Sleeve Inserted end (tip)
51c Recess 52 Groove 53 in a direction away from the end where the sleeve is inserted Circumferential groove 53a One end of the groove 53b The other end of the groove 54 Latch 56 Seal member (O-ring)
58 Rubber ring groove 59 Flange 60 Inlet sleeves 70, 71 Outlet sleeves 70a, 71a Ends 70b, 71b inserted into housing nozzles Opposite ends (inserted into piping nozzles) inserted into housing nozzles End 71c Convex 72 Ball plunger 74 Groove 76 for O-ring Seal member (O-ring)
80 Entrance plastic bag 90 Exit plastic bag 93, 95 Rubber ring

Claims (5)

A hollow housing fixedly installed, the housing having a housing nozzle for introducing or filtering out the gas to be filtered;
A filter disposed within the housing;
A sleeve inserted into the housing nozzle, wherein at least one ball plunger projects radially outward at an end opposite to the end inserted into the housing nozzle;
A pipe nozzle into which the sleeve is inserted, wherein a groove through which a ball plunger protruding from the sleeve passes is formed in an inner surface of the pipe nozzle in a circumferential direction, and is one end side of the groove formed in the circumferential direction. A latch is formed to reduce the depth of the groove, and the sleeve is rotated with respect to the piping nozzle until the ball plunger exceeds the latch, so that the ball plunger is placed between the latch and one end of the groove. The groove is sandwiched to prevent circumferential rotation of the sleeve with respect to the pipe nozzle, and a groove through which the ball plunger passes from the other end of the groove formed in the circumferential direction away from the end into which the sleeve is inserted. Formed with a piping nozzle,
Box type filter device. A hollow housing fixedly installed, wherein a housing nozzle that introduces a gas to be filtered or discharges the filtered gas;
A filter disposed within the housing;
A sleeve inserted into the housing nozzle;
A pipe nozzle into which the sleeve is inserted, wherein at least one ball plunger protrudes radially inward at an end where the sleeve is inserted;
In the sleeve, a groove through which the ball plunger protruding from the piping nozzle passes is formed in the circumferential direction on the outer surface of the sleeve, and the depth of the groove is reduced on one end side of the groove formed in the circumferential direction. A latch is formed, and the sleeve is rotated with respect to the pipe nozzle until the ball plunger of the pipe nozzle exceeds the latch, so that the ball plunger is sandwiched between the latch and one end of the groove. The sleeve is prevented from rotating in the circumferential direction with respect to the pipe nozzle, and a groove is formed through which the ball plunger passes in a direction away from the end inserted into the pipe nozzle from the other end of the groove formed in the circumferential direction. The
Box type filter device. The housing has an inlet housing nozzle for introducing the gas to be filtered and an outlet housing nozzle for discharging the filtered gas;
An inlet sleeve inserted into the inlet housing nozzle;
The sleeve, wherein the outlet sleeve is inserted into the outlet housing nozzle;
An inlet piping nozzle into which the inlet sleeve is inserted, the piping nozzle;
The piping nozzle, comprising an outlet piping nozzle into which the outlet sleeve is inserted;
The box-type filter apparatus of Claim 1 or Claim 2. The sleeve further includes a seal member at an end inserted into the housing nozzle and an end inserted into the piping nozzle.
The box-type filter apparatus of any one of Claim 1 thru | or 3. The sleeve has a convex portion at an end inserted into the housing nozzle and an end inserted into the piping nozzle,
The housing nozzle has a recess for fitting with the projection,
The piping nozzle has a recess that fits into the projection,
A seal is formed by fitting the convex portion and the concave portion,
The box-type filter apparatus of any one of Claim 1 thru | or 3.

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