KR102576195B1 - Replaceable housing for air dryer cartridge - Google Patents

Abstract

The present invention relates to an air dryer cartridge for commercial vehicles, which includes a pressure adjustment unit capable of adjusting the force applied to the filter body by a spring member and a lifting element so that only the filter body inside the cartridge can be selectively replaced. it's about

Description

REPLACEABLE HOUSING FOR AIR DRYER CARTRIDGE

The present invention relates to a housing for an air dryer cartridge applied to a compressed air treatment system for a commercial vehicle, and more particularly, to a housing for an air dryer cartridge applied to a compressed air treatment system for supplying compressed air to a commercial vehicle.

In commercial vehicles, various operating systems using pneumatic pressure are provided to control the operation of large and heavy commercial vehicles. Examples of such pneumatic systems include service brake systems, pneumatic suspension systems, parking brake systems, and the like. To drive these pneumatic systems, high-pressure compressed air is required, and this compressed air is generated through a compressor driven by an engine or drive motor and then delivered to the reservoirs of the respective compressed air consuming systems.

On the other hand, the compressed air supplied through the compressor contains foreign substances including oil and moisture. Foreign substances such as oil and moisture in the compressed air have a negative effect on the system, such as causing failure of the pneumatic system or reducing durability. do.

Therefore, in a system for generating and supplying compressed air, a dryer unit including a filter cartridge is provided to filter foreign substances such as oil from the generated compressed air and absorb moisture to produce dry air.

1 shows an example of a compressed air treatment system in which a conventional dryer unit is installed.

As shown in FIG. 1 , oil and moisture are removed from the high-pressure compressed air generated by the compressor 10 while passing through the dryer unit 20 . In particular, compressed air introduced into the dryer unit 20 is treated while passing through the filter cartridge 21, and the treated compressed air is supplied to each consumption circuit side through the valve assembly 22.

On the other hand, when the dehumidifying agent in the dryer unit reaches saturation or the like does not exhibit sufficient dehumidifying performance, a regeneration process may be performed to recover the performance of the dehumidifying agent by returning the dried compressed air to the dryer unit. In this case, the compressed air flow shows a flow in generally the opposite direction to that at the time of supply.

For example, Korean Patent Publication No. 10-2018-0118715 (Patent Document 1) and Korean Patent Registration No. 10-2248424 (Patent Document 2) disclose an air dryer cartridge of a compressed air treatment system.

The air dryer cartridges disclosed in Patent Documents 1 and 2 above are fixed by directly fastening the dryer cartridge itself onto the valve unit. On the other hand, when the performance of the internal dehumidifier and oil absorbent paper is deteriorated, the entire air dryer cartridge is replaced. At this time, the existing air dryer cartridge had difficulties in operation in that the dryer cartridge had to be replaced from the air treatment unit after removing the air treatment unit from the vehicle.

Korean Patent Publication No. 10-2018-0118715 (2018. 10. 31.) Korean Patent Registration No. 10-2248424 (2021. 04. 29.)

An object of the present invention is to provide an air dryer cartridge in which only parts related to dehumidification and filtering performance that need to be replaced due to expendability among the components of the air dryer cartridge are selectively replaceable.

In particular, in the present invention, an air dryer cartridge that can easily self-replace consumables by a method in which a worker simply removes a part of the housing by releasing the coupling of a fixing device fastened to fix the separated housing without using a special tool. It has another purpose to provide.

In order to achieve the above object, in a preferred embodiment of the present invention, a separate and replaceable housing for an air dryer cartridge of a commercial vehicle includes a first open end on one side and a first flange protruding outward from the first open end. a cylindrical upper housing with a portion formed thereon; a cylindrical lower housing including a second open end on one side and having a second flange portion protruding outward from the second open end; a main sealing member inserted between the first flange portion and the second flange portion; and a fastening mechanism for engaging the upper housing and the lower housing while pressing the upper housing and the lower housing inward in a radial direction while surrounding the first flange portion and the second flange portion. .

In addition, the main sealing member is an O-ring, and the fastening mechanism is a semicircular first clamping portion, another semicircular second clamping portion, and a bolting groove formed in the first clamping portion and the second clamping portion. It includes bolts to be fastened, and the outer diameter of the first flange portion may be larger than the outer diameter of the second flange portion.

The upper housing includes a first flange portion extending radially outward from an end of the housing and a first connecting end extending downward in an axial direction from the first flange portion, and the lower housing extends radially outward from the housing end. A second flange portion formed and a second connecting end portion extending downward in an axial direction from the second flange portion, wherein the main sealing member is an O-ring, provided between the outer side of the main sealing member and the fastening mechanism An auxiliary sealing member may be further included.

In particular, the auxiliary sealing member is made of a ring-shaped packing including a concave inner surface capable of being in close contact with the main sealing member and a flat outer surface capable of being in close contact with the clamping part of the fastening mechanism, and the clamping part of the fastening mechanism is the auxiliary sealing member. Pressing protrusions may be formed to press the flat outer surface of the sealing member toward the inside of the housing in a radial direction.

In addition, the auxiliary sealing member is composed of a first auxiliary sealing member and a second auxiliary sealing member disposed vertically, the first auxiliary sealing member has a concave inner surface capable of being in close contact with the main sealing member, and clamping of the fastening mechanism. The second auxiliary sealing member has a structure symmetrical to that of the first auxiliary sealing member, and has a concave inner surface capable of being in close contact with the main sealing member, and the fastening mechanism. It is made of a ring-shaped packing including an outer inclined surface capable of being in close contact with the clamping part, and the clamping part has a pair of inclined surfaces so as to be pressed in close contact with each inclined surface of the first auxiliary sealing member and the second auxiliary sealing member. A pressing protrusion may be formed.

A flat unloading surface is formed in the center of the pressing protrusion of the clamping part, the protruding height of the central unloading surface is higher than the upper and lower ends of the pressing protrusion, and the first auxiliary sealing member and the second auxiliary sealing member The sealing member may be spaced apart while forming a predetermined gap as it is pressed by the pressing protrusion, and may come into close contact with the first flange portion and the second flange portion, respectively.

It further includes a third auxiliary sealing member inserted between the upper housing and the lower housing, wherein the third auxiliary sealing member is between the first connecting end of the upper housing and the second connecting end of the lower housing. a plate-shaped base portion to be inserted; a pair of fixing protrusions protruding upward and downward on the base portion; And a lip portion including an upper lip and a lower lip extending from the base portion to an outer inclined surface of the first connecting end and an outer inclined surface of the second connecting end, respectively, wherein the third auxiliary sealing member comprises The pair of fixing protrusions may be seated and fixed to a pair of protrusion seating grooves respectively formed at the first connection end and the second connection end.

According to the present invention, among the main parts of the air dryer cartridge, only the filter body including the oil absorbent paper and the dehumidifying agent, which are directly related to the actual performance, can be selectively replaced, so parts such as the relatively expensive housing can be reused as they are. This has the advantage of reducing replacement costs.

In addition, according to the present invention, as the fixing device fixing the separated housing is released, consumables can be replaced immediately without removing the air dryer cartridge, so the replacement can be simplified and the user can easily replace the filters by himself. There are advantages to being able to

In addition, according to a preferred embodiment of the present invention, since it is possible to effectively secure airtightness between housings configured separately, there is an advantage in that reduction in purification efficiency due to leakage of compressed air can be prevented.

1 shows an example of a compressed air treatment system in which a conventional dryer unit is installed.
2 is a cross-sectional view of an embodiment of a cartridge for an air dryer including a separate and replaceable housing according to a preferred embodiment of the present invention.
FIG. 3 is a cross-sectional view of a coupling portion A of the separate and replaceable housing of FIG. 2 .
Figure 4 is an exploded perspective view of the main components of a separate replaceable housing for an air dryer cartridge according to a preferred embodiment of the present invention.
Figures 5a and 5b are cross-sectional views of a coupling part of a separate and replaceable housing for an air dryer cartridge according to another preferred embodiment of the present invention, Figure 5a shows before fastening, Figure 5b shows after fastening.
Figures 6a and 6b is a cross-sectional view of the coupling portion of the separate and replaceable housing for an air dryer cartridge according to another preferred embodiment of the present invention, Figure 6a shows before fastening, Figure 6b shows after fastening.
Figure 7a is a cross-sectional view of a coupling part of a separate and replaceable housing for an air dryer cartridge according to another preferred embodiment of the present invention, and Figure 7b is an enlarged view of its detailed configuration.

The embodiments described below are only intended to be described in detail so that those skilled in the art can easily practice the invention, which does not mean that the scope of protection of the present invention is limited. don't Therefore, substitution or change of some elements may be made without departing from the essential scope of the present invention.

In the following description, when a part is said to be 'connected' to another part, this includes not only the case where it is directly connected but also the case where it is connected with another element or device in between. In addition, when a certain part 'includes' a certain component, this means that it may further include other components without excluding other components unless otherwise stated.

Like conventional dryer cartridges, the air dryer cartridge described herein is configured to remove oil in compressed air, dry compressed air, and supply the compressed air in one direction, while supplying compressed air to regenerate the cartridge according to certain conditions. It means that it is configured to perform the process of flowing in the opposite direction and then discharging to the atmosphere. In particular, the air dryer cartridge in the present specification refers to an assembly in which a filter configured to remove foreign substances and moisture contained in compressed air is embedded, and refers to a device configured to allow inflow and outflow of compressed air toward the filter. In addition, in the present specification, the filter body refers to all parts including filters for dehumidification and/or removal of foreign substances, and the filter body refers to a part that is replaceably installed in the housing of the air dryer cartridge. Accordingly, in the present specification, the filter body is one of the components constituting the air dryer cartridge, and may refer to a filter assembly component that is detachable and replaceably mounted.

The air dryer cartridge according to the present invention is configured to include an inlet port through which compressed air is introduced and an outlet port through which compressed air is discharged. The terms 'inflow' and 'outflow' used herein refer to the operating state of the compressed air treatment system. It is a concept that is relatively determined according to the flow direction of compressed air. However, in this specification, for convenience of description, 'inflow' and 'outflow' are defined based on a state in which compressed air is supplied, that is, a state in which air generated by a compressor flows into the air dryer cartridge and then flows out toward the valve assembly. Explain. For reference, since the air flows in the opposite direction inside the cartridge during regeneration, the fact that 'inflow' and 'outflow' are opposite to those when compressed air is supplied is known to those skilled in the art. If so, you will be able to fully understand.

In addition, in the present specification, compressed air being 'treated' means that oil, moisture, and foreign substances in the compressed air are filtered while the compressed air passes through the filter cartridge.

Hereinafter, a separate and replaceable housing for an air dryer cartridge according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

2 is a cross-sectional view of an example of a cartridge for an air dryer including a separate and replaceable housing according to a preferred embodiment of the present invention, and in FIG. 3, an enlarged view of a coupling portion A of the separate and replaceable housing of FIG. 2 is shown. . In addition, Figure 4 is an exploded perspective view of the main components of the separate replaceable housing according to a preferred embodiment of the present invention.

As shown in FIG. 2, the air dryer cartridge according to a preferred embodiment of the present invention is formed substantially rotationally symmetrical with respect to a central axis in a vertical direction, and a generally cylindrical housing 100 is filled with a desiccant 230. The filter body has a housed shape.

As shown in FIG. 2 , the cylindrical housing 100 has a structure divided into two vertically, forming a cylindrical structure having an internal storage space by the upper housing 110 and the lower housing 120 . A filter body filled with a desiccant 230 may be accommodated in the internal storage space, and only the filter body may be replaced after the upper housing 110 and the lower housing 120 are separated.

In the present specification, the filter body may mean the entire container in which the desiccant 230 is accommodated, and for example, as shown in FIG. A filter body cover 220 covering the opening may be included. The filter body cover 220 functions as a lid that prevents the desiccant 230 from being discharged to the outside, and a discharge port may be formed in the center so that compressed air passing through the desiccant 230 inside the filter body can be discharged. .

The desiccant filled in the filter body may be a powdery desiccant having a dehumidifying function, such as zeolite, or a structure impregnated with the desiccant. The desiccant 230 is completely filled in the inner space of the filter body, and as the filter body is pressurized by the desiccant 230 at the top, the density of the desiccant 230 can be sufficiently increased.

As shown in FIG. 2 , the spring member 240 may be positioned on the upper spring seating groove of the filter body storage unit 210, and may be a top-down structure that presses the filter body downward at the top of the inner space of the housing 100. can Conversely, the spring member 240 may be configured to be located at the lower end of the inner space of the housing so that the filter body containing the desiccant 230 is pushed upward by the spring member 240.

Meanwhile, a pre-filter 250 for primarily filtering foreign substances such as oil may be installed inside the air dryer cartridge. The pre-filter in the present invention is a filter member installed upstream of the filter body in which the desiccant 230 is stored, that is, before the compressed air passes through the desiccant 230 (based on the step of supplying (processing) the compressed air). can

The pre-filter 250 is for adsorbing and removing oil contained in compressed air, and may be, for example, an oil absorption paper made of a porous material or a non-woven material. However, the pre-filter 250 is not limited to the one exemplified above, and may be used without limitation as long as it can pre-filter the compressed air before the compressed air is introduced into the desiccant during the compressed air treatment process.

The filter body container portion 210 of the filter body may have a cylindrical structure concentric with the cylindrical housing 100, and thus may form a gap G between the cylindrical housing and the cylindrical housing.

The gap G between the housing and the filter body is a passage through which compressed air introduced into the cartridge moves. Accordingly, when the compressed air is processed, the compressed air introduced into the cartridge passes through the gap G and moves toward the desiccant in the filter body storage part. On the other hand, when the compressed air is regenerated, the compressed air introduced into the cartridge may pass through the desiccant and be discharged to the outside through the gap G.

Also, due to the gap G, the filter body can be removed through the open surface of the housing in a state where the two divided housings are removed.

On the other hand, according to one embodiment of the present invention, the pre-filter may be composed of an oil adsorption paper attached and fixed to the filter mounting part of the filter body container by wrapping, so that the separation of the oil adsorption paper can be effectively prevented. A holder 260 may be installed.

Meanwhile, a pre-filter holder 260 may be installed between the outer surface of the pre-filter 250 and the housing, and as shown in FIG. 2, the pre-filter holder 260 is disposed on the inner surface of the housing at the outer end in the outer circumferential direction. On the other hand, the inner end may be in close contact with the outer circumferential surface of the pre-filter 250.

Accordingly, the pre-filter may be supported by the pre-filter holder 260 to the outside in the radial direction of the housing, and retreated by the movement of the compressed air as it is supported by the filter body container 210 to the inside of the housing radial direction. Behavior can be prevented.

This pre-filter holder includes an arcuate support portion circumferentially directed toward the housing, and the pre-filter holder can be supported while contacting the housing by the arcuate support portion.

In addition, in each component inside the air dryer cartridge, sealing members such as O-rings and grooves for inserting and fixing them are formed between the separated components in order to sufficiently secure airtightness on the flow path through which the compressed air moves. can However, in the present invention, a detailed description of these sealing elements will be omitted.

In addition, although not shown, a pressure adjusting unit interlocking with the spring member may be installed to adjust the pressing force of the spring member 240. For example, this pressure adjusting unit may be fixed to the upper housing 110. . To this end, a hole for installing the pressure adjustment unit 200 may be formed in the upper housing 110, and a boss part capable of maintaining airtightness may be installed in the hole.

Meanwhile, in another example, the air dryer cartridge may be configured without a separate pressure control unit, and in this case, the upper housing 110 may have a closed structure without forming a separate hole.

The lower housing 120 may be connected to the valve assembly side of the air treatment device, and may preferably communicate with the valve assembly side to form an inlet port and an outlet port through which compressed air is introduced or discharged.

As defined above, the term 'filter body' in this specification may be defined as meaning all parts replaceably installed in the housing, including filters for dehumidifying and/or removing foreign substances. Therefore, the 'filter body' in the present specification includes the filter body container portion 210 filled with the desiccant, the filter body cover 220, and a pre-filter and pre-filter holder installed on the outer periphery of the filtering body, which are integrally removable. /May mean the entire dehumidifying part.

The filter body having such a configuration is accommodated in a housing, and the housing is configured to provide airtightness in the remaining areas except for the inlet port and the outlet port.

According to a preferred embodiment of the present invention, it is characterized in that the housing is provided in a structure divided into two vertically, and the divided structure of the housing is divided in the most ideal position to form an airtight seal in consideration of the pressure distribution of the compressed air in the housing. structure can be configured. Specifically, the risk of leakage is high in the upper and lower parts that function as chambers for compressed air due to the basic structure of the cylindrical housing, whereas the risk of leakage of compressed air is relatively high in the central part where compressed air moves up and down through the narrow gap (G). little. Therefore, according to a preferred embodiment of the present invention, the upper housing 110 and the lower housing 120 at the central portion forming a predetermined gap between the filter body, preferably at 1/2 of the total height of the housing It can be configured so that the interface of

2 to 4, the housing has a two-part structure including an upper housing 110 and a lower housing 120, and the lower end of the upper housing 110 and the upper end of the lower housing 120 have a radius of the housing. Flange portions protruding outward in the direction may be formed, respectively.

A sealing member 130 such as an O-ring may be seated between the flange portion of the upper housing 110 and the flange portion of the lower housing 120, and a fastening mechanism outside the upper and lower flange portions to provide effective airtightness. (140) may be installed.

4 shows a clamp provided as such a fastening mechanism 140 . Referring to FIG. 4 , the fastening mechanism 140 includes a first clamping portion 141 having a semicircular shape surrounding upper and lower flange portions and a second clamping portion 142 having a semicircular shape, and the first clamping portion 141 ) and the second clamping part 142 may be provided with a coupling element 143 . This coupling element 143 may be composed of a plurality of bolts as shown in FIG. 4, and the bolts are fastened by screwing into bolting grooves formed in the first clamping part 141 and the second clamping part 142, respectively. Accordingly, the first clamping part 141 and the second clamping part 142 can be firmly fixed. As shown in FIG. 2, the first clamping part 141 and the second clamping part 142 may each have a 'c'-shaped cross-sectional structure, and the housing escapes while surrounding the upper and lower flange parts by this cross-sectional structure. will prevent

In particular, as the two clamping parts are assembled by the coupling element 143 in a state where the first clamping part 141 and the second clamping part 142 are placed outside the flange part, the inner diameter of the fastening mechanism 140 is reduced. While tightening the upper housing 110 and the lower housing 120, it is possible to prevent the upper and lower housing parts from being separated. Therefore, the fastening mechanism 140 is configured to provide a predetermined pressing force toward the inside of the housing in the radial direction, and effective airtightness can be achieved by the pressing force provided by the fastening mechanism 140 toward the inside in the radial direction. .

On the other hand, the fastening mechanism 140 shown in FIGS. 2 to 4 is an example, and integrally connects the first clamping part 141 and the second clamping part 142 to be rotatable by a pivot shaft, and each Both ends of the clamping part may be configured in a structure capable of being coupled by the coupling element 143, and the fastener effectively covers the upper housing 110 and the lower housing while providing pressing force inward in the radial direction and effectively covering the flange portion of the housing. Other types of structures capable of preventing the departure of 120 may be employed.

2 to 4, according to a preferred embodiment of the present invention, an annular groove may be formed in the first flange portion of the upper housing 110 so that the sealing member 130 can be inserted. The sealing member 130 may be seated in the groove. At this time, the outer diameter of the first flange portion of the upper housing 110 may be formed slightly larger than the outer diameter of the second flange portion of the lower housing 120. The radial pressing force of the second clamping parts 141 and 142 induces the first flange part to generate fine deformation, and through this, airtight performance through the sealing member 130 in the annular groove can be improved.

Meanwhile, contrary to FIGS. 2 to 4, an annular groove may be formed on the second flange of the lower housing 120, and the outer diameter of the first flange may be slightly larger than the outer diameter of the second flange. there is.

An example of a separate and replaceable housing for a cartridge for an air dryer according to another preferred embodiment of the present invention will be described with reference to FIGS. 5A and 5B. In this regard, the basic structure of the upper housing and the lower housing 520 and the fastening mechanism is common to the example of FIG. 4 described above, and in the example of FIGS. And since the fastening structure shows a difference from the previous example of FIG. 3 , the description will be made based on the cross section of the connecting portion indicated by area A in FIG. 3 .

In this regard, FIG. 5A shows the upper housing 510 and the lower housing 520 before they are fastened by the fastening mechanism, and FIG. 5B shows them after they are fastened by the fastening mechanism.

As shown in FIG. 5A , the upper housing 510 may include a first flange portion extending outward in a radial direction from the housing end forming the connecting portion and a first connecting end portion extending downward in the axial direction. Similarly, the lower housing 520 may include a second flange portion extending outwardly in the radial direction from the housing end forming the connecting portion and a second connecting end portion extending downward in the axial direction.

The upper housing 510 and the lower housing 520 have a 'c' shape capable of accommodating the sealing members by the first and second flange portions 511 and 521 and the first and second connecting ends 512 and 522. It is possible to provide recesses for sealing members while forming a cross-sectional structure.

As shown in FIG. 5A, the sealing members in this embodiment are inserted into the grooves between the first and second flange parts, and the main seals inwardly adhere to the first and second connecting ends 512 and 522. As shown in the member 531 and FIG. 5B, it consists of an auxiliary sealing member 532 that is in close contact with the fastening mechanism to the outside.

The main sealing member 531 may be made of a general O-ring with a curved surface, and the auxiliary sealing member 532 is in close contact with the O-ring and presses the main sealing member 531 and the main sealing member 531 by the pressing force provided by the fastening mechanism. It may be made of packing in close contact with the upper and lower first and second flange portions. In addition, both the main sealing member 531 and the auxiliary sealing member 532 may be composed of sealing elements such as elastically deformable rubber.

In particular, the auxiliary sealing member 532 has a contact surface with the main sealing member 531 and a contact surface with the fastening mechanism. Preferably, as shown in FIG. 5A, the inner surface is a curved surface for effective contact with the main sealing member 531. It has a shape, and the outer surface may be a packing of a ring-shaped structure made of a flat surface to effectively transmit the pressing force from the fastening mechanism.

The fastening mechanism has basically the same structure as the previous example of FIG. 4 , but is characterized in that a pressing protrusion 541 for pressing the auxiliary sealing member 532 is formed at the inner center. The pressing protrusion 541 is formed over the entire inner area of the clamping portion 540 of the fastening mechanism, and may have a shape such as a ring-shaped band protruding from the inner surface of the clamping portion 540 of the fastening mechanism toward the housing side. . As shown in FIGS. 5A and 5B, the protruding surface of the pressing protrusion 541 is formed to correspond to the shape of the outer surface of the auxiliary sealing member 532, that is, the flat surface of the auxiliary sealing member 532, through which the housing It is possible to provide a uniform pressing force to the inside. 5B shows a state in which the upper and lower housings are fixed by the coupling element while the clamping portion of the fastening mechanism is placed as shown in FIG. 5A, and the auxiliary sealing member is provided in a state in which it can be constantly pressed by the pressing protrusion of the clamping portion. .

Therefore, as the housing according to the present embodiment provides a tightening force by the coupling element of the fastening mechanism, the housing coupling is completed in a state in which the pressing protrusion 541 of the fastening mechanism sufficiently presses the auxiliary sealing member 532, Airtight performance provided between the upper housing 510 and the lower housing 520 by the sealing member 531 may be enhanced. In addition, since airtightness can be additionally reinforced by the auxiliary sealing member 532, more effective airtight performance can be secured.

In this regard, the auxiliary sealing member 532 has an inwardly concave structure, and such a concave cross-sectional structure can effectively prevent pressure leakage inside the housing. Specifically, as shown in FIG. 5A, the inner curved portion of the auxiliary sealing member 532 is formed to face the direction in which the compressed air leaks and flows out, even if the compressed air leaks through the main sealing member 531. In the state supported by the fastening mechanism, it is possible to form an additional airtightness by resisting compressed air leaking. Therefore, when a fine leak occurs due to damage to the main sealing member 531, for example, even if high-pressure compressed air leaks in the area around the upper and lower flanges, which are the main leak occurrence point, the auxiliary sealing member 532 having a concave structure ), compressed air leakage can be effectively suppressed by the additional air tightness provided at the upper and lower end sides. In addition, since the pressing force of the fastening mechanism can be effectively buffered and supported by the auxiliary sealing member 532, the upper housing 510 and the lower housing 520 can be more firmly fastened.

Figures 6a and 6b is a cross-sectional view of the coupling portion of the separate and replaceable housing for an air dryer cartridge according to another preferred embodiment of the present invention, Figure 6a shows before fastening, Figure 6b shows after fastening.

The examples of FIGS. 6A and 6B have a similar basic configuration to the examples of FIGS. 5A and 5B, but unlike FIG. 5A, the auxiliary sealing member is divided into two structures, and the pressing protrusion of the clamping part and the outer surface of the auxiliary sealing member. It is characterized by having this inclined surface.

Specifically, as shown in FIG. 6A, the upper housing 610 has a first flange portion 611 extending radially outward from the housing end forming the connecting portion and a first connecting end portion 612 extending downward in the axial direction. ) may be included. Similarly, the lower housing 620 may include a second flange portion 621 extending radially outward from an end portion of the housing forming the connecting portion and a second connecting end portion 622 extending downward in the axial direction.

The upper housing 610 and the lower housing 620 have a 'c' shape capable of accommodating the sealing members by the first and second flange portions 611 and 621 and the first and second connecting ends 612 and 622. It is possible to provide recesses for sealing members while forming a cross-sectional structure.

As shown in FIG. 6A, the sealing members in this embodiment are inserted into the groove between the first flange portion 611 and the second flange portion 621, and the first and second connecting ends 612 and 622 inwardly. ) It consists of a main sealing member 631 in close contact with and an auxiliary sealing member 632 in close contact with the fastening mechanism to the outside, as shown in FIG. 6B.

The main sealing member 531 may be made of a general O-ring with a curved surface, and two auxiliary sealing members 632 and 633 are located behind the main sealing member. The two auxiliary sealing members 632 and 633 may be made of packing capable of being in close contact with the main sealing member 631 and the upper and lower first and second flange portions by the pressing force provided by the fastening mechanism while in close contact with the O-ring. . In addition, both the main sealing member 631 and the auxiliary sealing members 632 and 633 may be composed of sealing elements such as elastically deformable rubber.

The two auxiliary sealing members are disposed vertically and may have a structure symmetrical to each other. Referring to FIG. 6A, the first auxiliary sealing member 632 has a contact surface with the main sealing member 631 and a contact surface with the fastening mechanism. Preferably, as shown in FIG. 6A, the inner surface is the main sealing member 631 It has a concave curved inner surface 632a for effective contact with the inner surface 632a, and the outer surface 632b may be a packing having a ring-shaped structure made of an inclined surface so as to effectively transmit the pressing force from the fastening mechanism. The outer inclined surface of the first auxiliary sealing member 632 is matched with the inclined surface of the pressing projection of the clamping part of the fastening mechanism, and the pressing projection 641 presses the first auxiliary sealing member 632 as the clamping part 640 is tightened. As it rises along the inclined surface, as shown in FIG. 6B, the upper surface 632c of the first auxiliary sealing member 632 can function in close contact with the first flange portion 611 of the upper housing 610. Accordingly, as shown in FIG. 6B , the lower surface 632d of the first auxiliary sealing member 632 may be spaced apart from the upper surface of the second auxiliary sealing member 633 to form a predetermined gap.

In addition, the second auxiliary sealing member 633 has a structure symmetrical to the first auxiliary sealing member 632, and thus may be configured to have a concave curved inner surface and an inclined surface like the first auxiliary sealing member. The second auxiliary sealing member 633 may also come into close contact with the second flange portion 621 of the lower housing 620 like the first auxiliary sealing member while being pressed by the clamping portion of the fastening mechanism.

The fastening mechanism has basically the same structure as the example of FIG. 5A, but the inner center pressing protrusion 641 may have an inclined surface for pressing the first and second auxiliary sealing members 632 and 633. In particular, the pressure protrusion is formed with an inclined surface so that the protruding height of the center is higher than the upper and lower sides, and the central portion has a flat unloading structure to facilitate the behavior of the first and second auxiliary sealing members 632 and 633. side may be provided. The unloading surface of the pressing protrusion functions not to restrict the movement of each auxiliary sealing member without contacting the first and second auxiliary sealing members. The pressing protrusion 641 is formed over the entire inner area of the clamping portion 640 of the fastening mechanism, and may have a shape such as a ring-shaped band protruding from the inner surface of the clamping portion 640 of the fastening mechanism toward the housing side. .

According to the embodiment of FIGS. 6A and 6B, the first and second auxiliary sealing members 632 and 633 and the inclined surface of the pressure protrusion 641 can effectively reinforce the weak point of airtightness, resulting in more improved airtight performance. can provide

Figure 7a is a cross-sectional view of a coupling part of a separate and replaceable housing for an air dryer cartridge according to another preferred embodiment of the present invention, and Figure 7b is an enlarged view of its detailed configuration.

7A is substantially the same as the example of FIGS. 6A and 6B except that a third auxiliary sealing member is added. That is, as shown in FIG. 7A, the separable and replaceable housing according to the present embodiment includes an upper housing 710 including a first flange portion and a first connecting end portion, and a second flange portion and a second connecting end portion. The lower housing 720, the main sealing member 731 inserted into the groove between the upper housing 710 and the lower housing 720, the first and second auxiliary sealing members 732 and 733, and the pressing protrusion 741 ) may include a fastening mechanism including a clamping portion 740 formed thereon.

On the other hand, as shown in FIG. 7B, the third auxiliary sealing member is a ring-shaped sealing element inserted between the first connecting end of the upper housing and the second connecting end of the lower housing, and provides a gap between the connection portion between the upper housing and the lower housing. It may be configured to include a flat base portion 751 and a first fixing protrusion 752 and a second fixing protrusion 753 protruding vertically on the base portion so as to be fixed in the gap.

Meanwhile, the first connecting end of the upper housing and the second connecting end of the lower housing may each be configured to provide an outer inclined surface toward the main sealing member, and the third auxiliary sealing member extends from the base portion 751, It may include lip portions 744 and 755 composed of an upper lip 754 and a lower lip 755 that can come into close contact with the outer inclined surface. As shown in FIG. 7A, these lip portions 754 and 755 may provide enhanced airtight performance as they come into close contact with the main sealing member. The third auxiliary sealing member may be formed of a sealing element such as elastically deformable rubber, and the protrusion seating groove 713 of the upper housing in a state where the second fixing protrusion 753 is seated in the protrusion seating groove 723 of the lower housing. After the first fixing protrusion 752 is accurately positioned in ), it can be fixed by a fastening mechanism together with other airtight elements.

In the above, the present invention has been described in detail based on examples and accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the content described in the claims below.

100: housing
110: upper housing 120: lower housing
130: sealing member 140: fastening mechanism
141, 142: clamping part 143: coupling element
210: filter body container 220: filter body cover
230: desiccant 240: spring member
250: pre-filter 150: pre-filter holder
G: gap

Claims (7)

It is a removable and replaceable housing for air dryer cartridges in commercial vehicles.
a cylindrical upper housing including a first open end at one side and having a first flange portion protruding outward from the first open end;
a cylindrical lower housing including a second open end on one side and having a second flange portion protruding outward from the second open end;
a main sealing member inserted between the first flange portion and the second flange portion; and
A fastening mechanism for fastening the upper housing and the lower housing while pressing them radially inward while surrounding the first flange portion and the second flange portion; includes,
The first flange portion of the upper housing extends radially outwardly from an end of the housing, and the upper housing further includes a first connection end extending downward from the first flange portion in an axial direction,
The second flange portion of the lower housing extends radially outwardly from an end of the housing, and the lower housing further includes a second connection end extending downward from the second flange portion in an axial direction,
The main sealing member is an O-ring,
A separate and replaceable housing for an air dryer cartridge, characterized in that it further comprises an auxiliary sealing member provided between the outside of the main sealing member and the fastening mechanism.
The method of claim 1,
The fastening mechanism has a semicircular first clamping portion having a 'c'-shaped cross-section structure surrounding the first flange portion and the second flange portion, and a 'c' portion surrounding the first flange portion and the second flange portion. The first clamping part and the second clamping part can be fixed by being fastened to another semicircular second clamping part having a cross-sectional structure and bolting grooves respectively formed in the first clamping part and the second clamping part. A separate replaceable housing for an air dryer cartridge, characterized in that it comprises a bolt in the.
The method of claim 2,
The auxiliary sealing member is made of a ring-shaped packing including a concave inner surface capable of being in close contact with the main sealing member and a flat outer surface capable of being in close contact with the first clamping part and the second clamping part,
Separation for an air dryer cartridge, characterized in that the first clamping part and the second clamping part of the fastening mechanism are formed with pressing protrusions for pressing the flat outer surface of the auxiliary sealing member toward the inner side in the radial direction of the housing. Replaceable housing.
The method of claim 2,
The auxiliary sealing member is composed of a first auxiliary sealing member and a second auxiliary sealing member disposed vertically,
The first auxiliary sealing member is made of a ring-shaped packing including a concave inner surface capable of being in close contact with the main sealing member and an outer inclined surface capable of being in close contact with the first clamping part and the second clamping part of the fastening mechanism,
The second auxiliary sealing member has a structure symmetrical to that of the first auxiliary sealing member, and has a concave inner surface capable of being in close contact with the main sealing member, and an outer surface capable of being in close contact with the first clamping part and the second clamping part of the fastening mechanism. It consists of a ring-shaped packing including an inclined surface,
Air characterized in that the first clamping portion and the second clamping portion are formed with a pressing protrusion having a pair of inclined surfaces so as to be pressed in close contact with each inclined surface of the first auxiliary sealing member and the second auxiliary sealing member, respectively. Detachable replaceable housing for dryer cartridges.
The method of claim 4,
A flat unloading surface is formed in the center of each pressing protrusion of the first clamping part and the second clamping part, and the protruding height of the central unloading surface is higher than the upper and lower end sides of the pressing protrusion,
The first auxiliary sealing member and the second auxiliary sealing member,
Separable and replaceable housing for air dryer cartridge, characterized in that the first flange portion and the second flange portion are in close contact with each other while forming a predetermined gap as they are pressed by the pressing protrusion portion.
The method of claim 5,
Further comprising a third auxiliary sealing member inserted between the upper housing and the lower housing,
The third auxiliary sealing member,
a flat base portion inserted between the first connection end of the upper housing and the second connection end of the lower housing;
a pair of fixing protrusions protruding upward and downward on the base portion; and
A lip portion including an upper lip and a lower lip extending from the base portion to an outer inclined surface of the first connecting end portion and an outer inclined surface of the second connecting end portion, respectively,
The third auxiliary sealing member is separated and replaced for an air dryer cartridge, characterized in that the pair of fixing protrusions are seated and fixed to a pair of protrusion receiving grooves respectively formed at the first connecting end and the second connecting end. mold housing.

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