JPH0628171Y2 - Compressed air dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a compressed air drying device used for an air brake pressure source of a vehicle or the like.

[Conventional technology]

As a compressed air drying device of this type, there is a conventional Japanese Patent Laid-Open No.
There is one disclosed in Japanese Patent Publication No. 44022. This compressed air drying device introduces the compressed air discharged from the air compression device into the drying cylinder through an inlet formed in the base member, and the compressed air is filled in the drying cylinder while the compressed air passes through the drying cylinder. The water contained in the compressed air is removed with a different adsorbent, and the compressed air is allowed to flow out to the air storage tank (regeneration air storage tank) formed between the drying cylinder and the cover member covering the drying cylinder to form the base member from the air storage tank. It is configured to supply to the outside through an outlet, and a discharge valve that connects and disconnects the discharge port and the inside of the drying cylinder is provided in the base member.

[Problems to be solved by the device]

By the way, in this conventional compressed air drying device, the upper surface of the base member is covered with a plate-shaped member with a plurality of sealing members (seal rings) interposed, and the drying cylinder and the cover are placed on the plate-shaped member. The cover member and the plate member are hermetically mounted and fixed by welding the cylinder member to which the opening of the cover member is externally fitted to the plate member by sealing the cover member and the plate member. This is done by forming a small space between the opening and the corner of the flange, and disposing a sealing member in the space. Therefore, there is an operation of welding the tubular member, which is troublesome and time-consuming.

In addition, a sealing structure in which a peripheral groove is formed on a surface of the plate-shaped member which is in contact with the outer surface of the flange portion of the cover member and which is closed by the flange portion, and a sealing member is fitted into the peripheral groove. However, in this case, in order to form the circumferential groove, the plate thickness of the plate-shaped member must be increased correspondingly, which causes a problem that the material cost increases.

The present invention has been made to solve the above-mentioned problems, and it is not necessary to make the plate member thicker than necessary, and the compressed air does not require any special work to make a space for housing the sealing member. An object is to provide a drying device.

(Means for Solving the Problems) In order to achieve the above object, the present invention arranges the plate-shaped member in a recess provided in the base member, and the inner peripheral surface and the bottom surface of the recess and the plate-shaped member. The sealing member is disposed in an annular space defined by the outer peripheral surface of the and the outward flange portion.

[Action]

In the present invention, a cavity for accommodating a sealing member for sealing the space between the cover member and the plate-like member to the outside is formed by the base member, the plate-like member and the cover member to form the cavity. Since it is not necessary to attach a special member, the assembly work of the device can be simplified as compared with the conventional one, and since it is not necessary to form the circumferential groove in the plate member, the plate member The plate thickness can be reduced.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a base member, which has a recessed portion 3 that opens to an upper surface 2 in a central portion, and a cylindrical portion 4 that concentrically opens upward in the recessed portion 3 is a recessed portion. An inlet passage (longitudinal passage) 5 is defined between the inner peripheral surface of the outer peripheral surface 3 and the inner peripheral surface of the outer peripheral surface 3, and an outer peripheral portion 6 is formed with a radial inlet 7 and an outlet 8 opening to the peripheral surface, and in the lower portion. A discharge cylinder portion 10 having a discharge port 9 is formed. A plurality of radial passages 4A communicating with the inlet passage 5 are formed at the base of the tubular portion 4. A circulating passage 11 is provided between the inlet 7 and the inlet passage 5, and the circulating passage 11 is a multiple curved passage formed of a plurality of arcuate wall portions 12 having different radii from the center of the base member 1. , Has the effect of cooling the introduced compressed air. The outlet 8 communicates with an outlet passage 13 opening on the upper surface 2. A circumferential protrusion 14 protruding from the upper surface 2 is formed on the outer peripheral portion 6 of the base member 1, and a stepped recess 15 including a large diameter portion 15A and a small diameter portion 15B is formed on the circumferential protrusion 14. This small diameter part 15B
Referring to the shape of the sealing member 18 shown in FIG. 2 (a) on the bottom surface of the peripheral groove 16 at the position where the receiving portion 14A remains.
A is formed and the circumferential groove 16 surrounding the outlet passage 13 is formed.
B is formed by connecting two grooves 16C to the circumferential groove 16A. A peripheral groove 17 is also formed on the upper surface of the tubular portion 4. An integrally molded sealing member 18 (FIGS. 2 (a) and 2 (b)) is fitted into the circumferential grooves 16A, 16B and 16C, and the circumferential groove 17
A sealing member 19 is fitted in the.

The upper surface 2 side of the base member 1 is covered with a plate-shaped member 20, and the plate-shaped member 20 communicates with the inlet passage 5.
It has a through hole 22 and a screw hole 23 communicating with the outlet passage 13, and is fitted into the small diameter portion 15B of the recess 15.

A bottomed drying cylinder 24 is vertically mounted on the plate-shaped member 20 and fixed to the plate-shaped member 20 with a screw 26 screwed into the bottom 25 through a screw hole 23. This bottom 25
The outer peripheral portion of the is formed to have a slightly smaller diameter, and the sealing member 2
7 is fitted. The drying cylinder 24 has a through hole 28 communicating with the through hole 21 in the bottom 25 thereof, and a filter device 29 is fixed to the boss portion 30 projecting inward from the center of the bottom 25 with a screw 31 on the bottom side thereof. I am storing it. The inside of the drying cylinder 24 is covered with a lid 35 having a throttle hole 32 and an outlet hole 34 which is closed by a check valve 33. In a space above the filter device 29, a perforated plate is provided between the filter device 29 and the filter device 29. A resorbable adsorbent 38 is filled through the filter member 36 and the filter member 37, and the layer of the adsorbent 38 is pressed by the spring 41 via the porous member 39 and the filter member 40. Reference numeral 42 denotes a cover member, which is a tubular body having a diameter larger than that of the drying cylinder 24 and has an outward flange portion 43.
4 is placed over the upper surface 2 of the base member 1 and the plate-like member 20 and fixed to the upper surface 2 of the base member 1 with a screw (not shown), so that the regeneration storage tank is provided between the drying cylinder 24 and the drying cylinder 24. Which defines a void 44 which becomes a recess 15 of the circumferential projection 14 and a large-diameter portion 15A
The outer peripheral surface of the plate-shaped member 20 and the outer peripheral surface of the plate-shaped member 20 are formed with an opening of a peripheral groove 45 which faces the outward flange portion 43.
To form a void for housing the sealing member 46.

Reference numeral 47 denotes a discharge valve, which is fitted in the discharge cylinder 10 and is housed in a plug 49 which is prevented from coming off by a retaining ring 48, and its piston 50 is urged upward by a valve spring 51 to be a cylinder portion. 4, and a control chamber 52 communicating with a control port (not shown) is defined between the control chamber 52 and the plate member 20. At the lower end of the piston 50, a valve element 54 having a valve seat formed around the periphery of a valve hole 53 formed in the plug 49 is attached to the bolt 5
It is installed in 5.

In this configuration, compressed air from an air compressor (not shown) is supplied to the inlet 6, and the supplied compressed air passes through the circulation passage 11, the inlet passage 5, the through hole 21, and the through hole 28 to the drying cylinder 24. Enter, filter device 29, perforated plate 36,
Passing through the filter member 37 to rise the layer of the adsorbent 38,
Water is removed by the adsorbent 38, flows out from the outlet hole 34 into the air storage tank 44, fills the air storage tank 44, passes through the outlet passage 13 through the outlet 8, and is not shown through a pipe connected to this outlet. It is supplied to the air storage tank (main air storage tank). An air pressure signal is sent from the governor device for monitoring the pressure in the air storage tank through the control port to the control chamber 52.
When it is supplied to, the discharge valve 47 opens, the drain accumulated at the bottom of the recess 3 is discharged, and the dry compressed air flows backward from the air storage tank 44 through the throttle hole 32 into the drying cylinder 24, Regeneration of the adsorbent 38 is performed.

In the present embodiment, the upper surface 2 of the base member 1 has a peripheral projection 14, and the peripheral projection 14 is formed with a recess 15 having a depth equal to the thickness of the plate member 20. 20 in this recess 15
By having a size that fits inside the small-diameter portion 15B, a peripheral groove 45 that opens upward is formed between the outer peripheral surface of the plate member 20 and the inner peripheral surface 15a and the bottom surface 15b of the recess 15,
Since the opening of the circumferential groove 45 is covered by the outward flange portion 43 of the cover member 42, by fitting the sealing member 46 into the circumferential groove 45, the space between the cover member 42 and the plate member 20 is covered. By sealing between the member 42 and the base member 1, it is possible to seal to the outside, and the peripheral projection 14 can be integrally formed when the base member 1 is molded, so that the device is assembled. At the same time, the work of forming a space for accommodating the sealing member 46 is not required, and the peripheral groove for fitting the sealing member 46 is not provided in the plate-shaped member 20. You don't have to increase it.

[Effect of device]

As described above, the present invention provides a space for accommodating a sealing member that seals the space between the cover member and the plate member from the outside.
Since the base member, the plate member, and the cover member are formed, and it is not necessary to attach a special member to form the above-mentioned void, the device assembling work can be simplified as compared with the related art. it can.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 (a),
(b) is a side view of the sealing member used in the above-mentioned embodiment. 1 ... Base member, 5 ... Entrance passage, 7 ... Entrance, 8 ... Exit, 10 ... Discharge port, 13 ... Exit passage, 14 ... Circumferential projection, 15 ... Recess, 15a ... Inner peripheral surface, 15b ... bottom surface, 18, 19, 27 ... sealing member, 20 ... plate member, 24 ... drying cylinder, 38 ... adsorbent, 42 ... cover member, 43 ... outward flange Part, 46 ... Sealing member.

Claims (1)

[Scope of utility model registration request] 1. An inlet having a base member formed with an inlet communicating with an air compressor and an outlet communicating with an air storage tank, the inlet having one end communicating with the inlet and the other end opening on the upper surface of the base member. An outlet passage formed in the base member, one end of which communicates with the outlet and the other end of which opens on the upper surface of the base member, a discharge passage formed in the base member, which communicates the inlet passage with the outside air, and the discharge passage are provided in the discharge passage. A discharge valve that opens according to a command from the outside, a plate-shaped member that is arranged on the upper surface of the base member and has an opening that communicates with the inlet passage and the outlet passage, and one end that is arranged on the opposite side of the plate-shaped member from the base member. Is connected to the inlet passage through the opening of the plate member, the other end is connected to the surrounding space and the outlet passage through the opening of the plate member, and a resorbable adsorbent housed in the inner space of the drying cylinder. And a cover member surrounding the drying cylinder and the cover. An outward flange portion provided on the member and fixed to the upper surface of the base member, a sealing means for blocking communication between the outlet passage and the inlet passage arranged between the plate-shaped member and the base member, and outside air, and a plate In a compressed air drying device having a sealing member for sealing between a plate-shaped member and an outward flange portion of a cover member, the plate-shaped member is arranged in a recess provided in the base member, and an inner peripheral surface of the recess is provided. And a compressed air drying device in which the sealing member is arranged in an annular space defined by the bottom surface, the outer peripheral surface of the plate-shaped member, and the outward flange portion.