KR102441797B1 - Regeneration sequence valve assembly for compressed air processing system in commercial vehicle - Google Patents

Abstract

The present invention provides a compressed air processing apparatus which can efficiently control compressed air supply and regeneration operations of the compressed air processing apparatus by an electronic control device. In particular, the present invention relates to a regeneration sequence valve which is interlocked by an input of a control valve and can delay regeneration in time, and to a regeneration sequence valve for the compressed air processing apparatus of a commercial vehicle, which can adjust operation speeds differently when the valve is open and when the valve is closed by an internal damping chamber.

Description

REGENERATION SEQUENCE VALVE ASSEMBLY FOR COMPRESSED AIR PROCESSING SYSTEM IN COMMERCIAL VEHICLE

The present invention relates to a regeneration sequence valve device for a compressed air treatment device of a commercial vehicle, and more particularly, it processes and supplies compressed air used in a braking system, a suspension system, etc. of a commercial vehicle, and re-flows the compressed air to regenerate the dryer. It relates to a regeneration sequence valve device installed in a compressed air treatment device.

The invention was made with the support of the Automotive Convergence Technology Institute's business diversification technology development and high-end support project for securing its own products (research project name), "Research project name: Localization technology development of electronic APU module for large commercial vehicles (task number: JIAT213657)" lost.

In a commercial vehicle, various actuation systems using pneumatic pressure are provided to control the operation of a large and heavy commercial vehicle. Examples of such pneumatic systems include a service brake system, a pneumatic suspension system, a parking brake system, and the like. To drive these pneumatic systems, high-pressure compressed air is required, which 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 may cause a malfunction of the pneumatic system or adversely affect the system, such as lowering durability. do.

In order to remove oil and moisture contained in the compressed air, a dryer unit including a filter cartridge containing a desiccant is included in the compressed air treatment apparatus. Such a dryer unit is installed on the compressed air supply line and is configured to filter oil contained in the compressed air flowing in from the compressor, as well as remove moisture and discharge dry, clean air to each system side.

On the other hand, the efficiency of treating compressed air inside the filter cartridge decreases over time, and in order to improve the efficiency of the filter cartridge, especially the moisture removal efficiency of the desiccant, a regeneration process of counter-flowing the already-treated compressed air is required. Through this regeneration process, the already treated compressed air flows back to the filter cartridge, and moisture and contaminants existing inside the filter cartridge are discharged to the outside.

In performing the compressed air supply and regeneration process, the compressed air supply or regeneration process is selectively performed by controlling a plurality of valves installed on each flow path.

The recent trend of the automobile industry is focused on improving fuel efficiency through weight reduction and optimal control, and in particular, in the case of commercial vehicles, technology to improve energy efficiency is gradually increasing for price competitiveness of logistics and transportation. This is absolutely required. As part of this, technologies are being applied in which the ECU electronically controls the system under optimal conditions for air supply based on vehicle information received from the ECU through vehicle communication.

In such an electronically controlled compressed air processing apparatus, a technique for preventing the compressor from consuming unnecessary compressed air and driving efficiency by implementing an optimal regeneration operation is required.

In the compressed air treatment apparatus, it is necessary to perform the regeneration process by the compressed air stored in the internal storage according to the situation, and a plurality of control valves for controlling this is included. In particular, a check valve is installed in the compressed air supply line to prevent a reverse flow of the compressed air. During regeneration, a bypass line for supplying the compressed air for regeneration to the filter cartridge side by bypassing the check valve may be formed. This bypass line is provided with a regeneration valve so that it can be opened only during regeneration.

On the other hand, in the case of such a regeneration valve, as the valve opening and closing by the high-pressure compressed air is repeated, a large shock is generated inside the valve, and the durability problem in which the valve is damaged by the shock occurs.

Korean Patent Registration No. 10-2248426 (April 29, 2021) Korean Patent Registration No. 10-2248427 (April 29, 2021)

The present invention has been devised to solve the above problems, and in the present invention, in configuring a compressed air processing apparatus capable of efficiently controlling compressed air supply and regeneration operations of the compressed air processing apparatus by an electronic control device, An object of the present invention is to provide a regeneration sequence valve that can effectively operate to control the opening and closing of such a solenoid valve.

In particular, in the present invention, the valve opening and closing operation is improved to prevent valve damage due to impact or at least greatly reduce the amount of shock that can cause valve damage despite repeated opening and closing operations in an environment where high-pressure compressed air flows in and out. It is an object of the present invention to provide a regenerative sequence valve device having a

In order to achieve the above object, in a preferred embodiment of the present invention, there is provided a regeneration sequence valve device installed on a regeneration line of a compressed air treatment apparatus for a commercial vehicle, comprising: a valve body having an internal space; a valve shaft assembly that is inserted and fixed in the internal space of the valve body and operates to open and close by receiving a control input by compressed air; and a valve cover fixedly mounted on the upper end of the valve body, wherein the piston part of the valve shaft assembly is vertically inserted into the lower groove of the valve cover, so that the internal volume of the valve shaft assembly is variable according to the opening and closing operation of the damping one or more openings for connecting the damping chamber to the outside are formed in the valve cover, and at least a part of the one or more openings is closed when the valve shaft assembly operates to close again in an open state A regenerative sequence valve device for a compressed air treatment device for a commercial vehicle is provided.

The regeneration sequence valve device includes: a first control input unit for receiving a first control input of compressed air for valve opening according to an operation of the first control valve; A second control input unit receiving a second control input of compressed air for opening the valve according to the operation of the second control valve is formed, and the valve shaft assembly is configured to receive a control input inputted to the first control input unit and the second control input unit. can be opened by

The valve shaft assembly includes: a valve shaft movable up and down in the inner space of the valve body; a hollow housing installed in the valve body to guide the vertical movement of the valve shaft; an adapter fixedly mounted to the valve shaft and operated integrally with the valve shaft within the housing; and a spring member mounted between the adapter and the valve housing and biased in response to a control input by the first control input and the second control input.

In order to control the flow path formed between the valve shaft and the housing according to the vertical movement of the valve shaft, the valve shaft has a shaft head extending in a radial direction at a lower end thereof, and the first control input applied by the first control input unit is A second control input applied by the second control input may be configured to act on the shaft head portion in a descending direction of the valve shaft, and may be configured to act on the adapter in a descending direction of the valve shaft.

The valve shaft assembly further includes a fixing clip for fixing the adapter to the shaft, the adapter has a ring shape inserted into the valve shaft, and the adapter inserted into the valve shaft is seated on the shoulder of the valve shaft with the fixing clip may be fixed to the valve shaft by

The housing may be formed to have a first guide surface for guiding the outer circumferential surface of the valve shaft and a second guide surface for guiding the outer circumferential surface of the adapter.

A first chamber into which the compressed air of the first control input is introduced is formed in the housing, and the first chamber is closed by the shaft head part when the first control input and the second input are not applied, and is disposed between the housing bottom and the valve body A discharge chamber connected to the outlet port is formed in the evacuation chamber, and as the valve shaft descends, the first chamber may communicate with the discharge chamber.

The valve cover is equipped with a cover member for an opening so as to open and close at least a part of the opening, and when the opening is closed by the cover member for the opening, it is possible to restrict the air inside the damping chamber from being discharged through the closed opening. have.

The opening cover member is mounted on the relay shaft passing through the valve cover, and the relay shaft may open at least a portion of the opening while moving downward when both the first control valve and the second control valve are opened.

The opening is formed to connect the outside air side and the damping chamber, the piston part is a sealing member forming an airtight seal with the inner wall of the lower groove of the valve cover, and the opening cover member may be made of a flexible member.

When the internal pressure of the damping chamber decreases as the valve shaft assembly descends, the opening cover member is configured to introduce outside air through the opening while being depressed downward, and when the valve shaft assembly descends and rises again, the opening cover The member may be configured to close against the valve cover and close at least a portion of the opening.

The opening cover member can open and close the whole opening.

The opening may be formed of two or more openings, and a cover member for the opening may be formed so as not to close the opening of at least one of the openings.

The opening is made of two or more openings, and the cover member for the opening may be formed so as not to close a partial area of the opening of one of the openings.

The valve cover has an auxiliary opening formed to connect the outside air side and the damping chamber, the auxiliary opening having a smaller cross-sectional area compared to the total cross-sectional area of the opening, and the auxiliary opening is separated from the opening cover member so as not to be closed by the opening cover member. It may be formed spaced apart.

According to a preferred embodiment of the present invention, filter cartridge regeneration can be performed at a desired time by configuring a regeneration sequence valve controlled by two control valves and controlling the opening and closing timing of these control valves.

In particular, according to a preferred embodiment of the present invention, an auxiliary chamber having a plurality of openings is formed on the upper cover side of the valve shaft, and the auxiliary chamber opening is blocked by a relay cover member. Through this, by providing additional resistance inside the valve against the closing movement of the valve shaft, the valve is closed relatively slowly, and there is an advantage in that it is possible to reduce the impact caused by the closing of the valve.

On the other hand, in the regeneration sequence valve device according to the preferred embodiment of the present invention, when the valve shaft is driven, the auxiliary chamber opening is opened by the relay cover member, so that the valve shaft is opened at a desired time without lowering the opening speed when the valve shaft is opened. There are advantages to being open.

Therefore, according to a preferred embodiment of the present invention, while maintaining an effective regeneration speed, the regeneration valve is prevented from being damaged by impact despite repeated regeneration operations, or at least the durability of the regeneration valve can be greatly improved. have.

1 shows an example of a compressed air treatment device to which a regeneration sequence valve device according to the present invention is applied.
2 is an exploded view showing the main configuration of a regeneration sequence valve device according to a preferred embodiment of the present invention;
3 to 5 show an example of a regenerative sequence valve device according to a preferred embodiment of the present invention. FIG. 3 shows a closed state of the regenerative sequence valve device, and FIG. 4 shows the regeneration sequence valve device fully open. 5 shows a state in which the regeneration sequence valve device is opened and then closed again.
6 shows a regenerative sequence valve device according to another preferred embodiment of the present invention.
7 to 10 show examples of a cover member for an opening for intermitting a damping chamber of a regenerative sequence valve device according to a preferred embodiment of the present invention;
7 shows an example of a cover member for an opening that closes the entire opening;
8 shows an example in which a part of one of the openings is not closed by the cover member for the opening;
9 shows an example in which any one of the openings is not closed by the opening cover member;
Fig. 10 shows an example including a cover member for opening that closes the entire opening, and an auxiliary opening that is not closed by the cover member for opening.

Hereinafter, a regeneration sequence valve device for a compressed air treatment device of a commercial vehicle according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

The embodiments described below are only for explaining in detail enough that those of ordinary skill in the art to which the present invention pertains can easily carry out the invention, which does not mean that the protection scope of the present invention is limited. does not Accordingly, substitutions or changes may be made to some components without departing from the essential scope of the present invention.

In the following description, when a part is 'connected' to another part, it includes not only a case in which it is directly connected, but also a case in which another element or device is interposed therebetween. In addition, when a part 'includes' a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

The compressed air treatment apparatus described herein includes a filter cartridge for removing oil and moisture contained in compressed air supplied from the compressor, like the conventional system. As used herein, compressed air being 'treated' means that the compressed air is passed through the filter cartridge to filter out oil, moisture, and foreign substances in the compressed air.

In addition, the compressed air treatment apparatus described in this specification may be supplied in one direction through a filter, and the compressed air that has been treated may be regenerated by counterflowing the compressed air that has already been treated under certain conditions.

In the present specification, the supply step means a process in which air compressed by the compressor is processed through the filter cartridge and then supplied to the compressed air consumption system, and the regeneration step returns the already-treated compressed air to the filter cartridge side to the inside of the filter cartridge. refers to the process of playing

1 shows an example of a compressed air treatment device to which a regeneration sequence valve device according to the present invention is applied.

A compressed air treatment device 1 equipped with a regeneration sequence valve device according to a preferred embodiment of the present invention includes a dryer unit 10 and a valve assembly 70, and a portion indicated by a broken line on the left in FIG. 1 is compressed from the compressor. The dryer unit 10 for receiving air, drying it through the filter cartridge 14 and supplying it to the valve assembly 70 side is indicated. In addition, the compressed air treatment device 1 includes the remaining parts of FIG. 1 , that is, the part indicated by the dashed-dotted line, which includes valves supplying each compressed air consumption system downstream of the first supply line 43 at the junction 57 . It may be configured to include a valve assembly 70 that

As shown in FIG. 1 , the compressed air processing device to which the regeneration sequence valve device according to the preferred embodiment of the present invention is applied receives the compressed air introduced through the compressed air inlet connected to the compressor (not shown) through the filter cartridge 14 . After processing through, it is configured to supply compressed air to the side of the valve assembly 70 connected to each compressed air consumption system.

A compressor (not shown) is a device for sucking in, compressing, and then discharging surrounding air, and the compressed air inlet is an inlet port for delivering compressed air discharged from the compressor to the compressed air treatment device according to the present invention. In addition, as in FIG. 1 , it may include another compressed air inlet in addition to the compressed air inlet 11 , and the compressed air auxiliary inlet 12 is generated from another compressed air inlet to the outside for the purpose of vehicle maintenance, etc. It can be used for the purpose of supplying compressed air into the system.

The compressed air supplied through the compressed air inlet 11 may be supplied to the filter cartridge 14 through the compressed air supply line 41 . The filter cartridge 14 is a filter structure containing a desiccant, and a desiccant for securing dehumidification performance is accommodated in the cartridge, and an oil adsorption filter is installed at the compressed air inlet side to remove oil.

Accordingly, the compressed air supplied through the compressed air inlet 11 is processed while passing through the filter cartridge 14 . The treated compressed air may be supplied to the central main supply line 42 through the main check valve 15 . The main check valve 15 is provided to prevent the treated compressed air present in the central main supply line 42 from flowing back to the filter cartridge 14 side.

The central main supply flow path includes a junction 57, at which junction 57 provides a first supply line 43 for supplying compressed air to the valve assembly 70 side connected to each consumption system side and regeneration control. A second supply line 44 connected to the electronic control valve side for

A number of consumption systems are connected to the first supply line 43 , for example, as in FIG. 1 , these consumption systems include first and second service brake systems 81 , 82 , parking brake system 84 . , an air suspension system 83 , a trailer supply system 85 , and an auxiliary supply system 86 . Overflow valves 71 , 72 , 73 , 74 and 75 for protecting circuits may be installed on the flow path to each system. The overflow valves 71 , 72 , 73 , 74 , and 75 may apply pressure to each system side only when an opening pressure for opening the flow path is set and exceeds a preset opening pressure.

The opening pressure of the overflow valves (71, 72, 73, 74, 75) connected to each circuit is set according to the priority of each consumption circuit, and preferably, the overflow valves (71, 72) on the service brake system side By setting the opening pressure of the valve to the lowest, compressed air can be supplied to the service brake side first. Accordingly, when compressed air is sufficiently supplied to the service brake to increase the pressure inside the line, the valves are sequentially opened according to the opening pressure of each overflow valve, and compressed air can be supplied to each consumption circuit. Also, check valves for preventing backflow may be installed in the valve assembly 70 .

On the other hand, the second supply line 44 corresponds to a supply line of compressed air for the regeneration process, and the compressed air passing through the second supply line 44 may be used as a control input for regeneration control, and the regeneration line ( 45) is also used as the compressed air for regeneration supplied to the filter cartridge 14 through the side.

On the other hand, the second supply line 44 corresponds to a supply line of compressed air for the regeneration process, and the compressed air passing through the second supply line 44 may be used as a control input for regeneration control, and the regeneration line ( 45) is also used as the compressed air for regeneration supplied to the filter cartridge 14 through the side. The regeneration line 45 refers to the line between the junction 55 and the filter cartridge 14 .

To this end, the compressed air treatment device according to the present invention comprises two electronic control valves, and an electronic control device 21 for electronically controlling the electronic control valves is provided. The electronic control device 21 can be electrically connected to other controllers or sensors in the vehicle, and is preferably configured to receive various state information of the vehicle from these controllers or sensors in real time. For example, as in FIG. 1 , the electronic control device 21 may be connected to pressure sensors 22 , 23 , 24 for measuring the pressure at a specific location in the compressed air treatment device. In addition, the electronic control device 21 is configured to enable switching control of the electronic control valve according to vehicle state information input from other controllers or sensors such as pressure sensors.

Since these electronic control valves can selectively control the supply mode and the regeneration mode, in the present invention, by the electronic control device 21, the supply step or the regeneration step is selectively performed in conjunction with the current state of the vehicle. it is possible

The two electronic control valves may be electrically operated solenoid valves, and are referred to herein as the first electronic control valve 31 and the second electronic control valve 35 . The two electronic control valves may be commonly used to perform the regeneration step, and preferably, the regeneration step may be completed by switching the two valves simultaneously or sequentially.

In particular, according to a preferred embodiment of the present invention, the first electronic control valve 31 and the second electronic control valve 35 may be configured as a 3-port 2-position valve as shown in FIG. 1 . For example, the first electronic control valve 31 includes a first port 32 connected to the compressor control outlet 51 side, a second port 33 and a vent 53 connected to the second supply line 44 side. It may include a third port 34 connected to the side. In addition, the first electronic control valve 31 has a first position where the first port 32 and the third port 34 are connected, and a second position where the first port 32 and the second port 33 are connected. can have a location. In a state in which power is not supplied, that is, in an OFF state of the first electronic control valve 31 , the first electronic control valve 31 is placed in the first position as shown in FIG. 1 , and thus the second supply line 44 ) side is closed, and the compressor control outlet 51 is connected to the vent 53 side. On the other hand, in the state in which power is supplied, that is, in the ON state of the first electronic control valve 31, the first electronic control valve 31 is switched to the second position, and thus the second supply line 44 is placed in the second position. 1 It is connected to the compressor control outlet (51) side through the electronic control valve (31). Accordingly, at the second position of the first electronic control valve 31 , compressed air is delivered to the compressor control outlet 51 side, and accordingly, it can function as a control input for controlling the driving state of the compressor.

In addition, according to a preferred embodiment of the present invention, the first port 32 of the first electronic control valve 31 is branched from the branch point 56 of the line connected to the compressor control outlet 51 to the regeneration line 45 . ) is configured so that compressed air can be supplied to the regeneration sequence valve 16 side. Accordingly, as the first electronic control valve 31 is switched and controlled to the second position, a control input is applied to the compressor control outlet 51 and, at the same time, the main supply is supplied to the third control input line 26 of the regeneration sequence valve 16 . Line compressed air can be supplied. In addition, the regeneration sequence valve 16 is connected to a fourth control input line 27 connected to the second electronic control valve 35, and the pressure of compressed air applied through the two control input lines 26 and 27 is When a predetermined set pressure is reached, the internal flow path of the regeneration sequence valve is configured to open. In this regard, the second electronic control valve 35 may also be configured as a three-port, two-position valve, like the first electronic control valve 31 .

Like the first electronic control valve 31 , the second port 37 may be connected to the second supply line 44 , and the third port 38 may be connected to the vent 53 . Meanwhile, the first port 36 of the second electronic control valve 35 is transmitted as a control input for controlling the opening and closing of the unloader valve 13 . Accordingly, as shown in FIG. 1 , the first port 36 is connected to the control inlet side of the unloader valve 13 .

The unloader valve 13 is installed on the exhaust line 47 , and is for discharging compressed air to the atmosphere through the exhaust port 52 . The unloader valve 13 may be configured as a 2-port 2-position valve, and may be configured to be pneumatically driven by receiving a control input through the second electronic control valve 35 . Accordingly, as the compressed air that has passed through the second electromagnetic control valve 35 is applied to the control inlet side of the unloader valve 13, it overcomes the spring force of the unloader valve 13 and the unloader valve 13 is It moves from the 1st position to the 2nd position. Here, the first position is the first port 13a branched from the compressed air supply line 41 between the compressor and the filter cartridge 14 and the second port 13b connected to the exhaust port 52 side, as shown in FIG. 1 . means a disconnected state, and the second position means a valve position in which the two ports are connected to each other and the compressed air supply line 41 side air can be discharged to the exhaust port 52 .

In addition, the unloader valve 13 is configured to be opened by receiving another control input from the compressed air supply line 41, and when the pressure of the compressed air supply line 41 exceeds a preset pressure It is configured to discharge the air of the compressed air supply line 41 to the outside. Through this, the unloader valve 13 can be opened automatically even when an unacceptable pressure rise occurs, thereby preventing overpressure from being formed on the compressed air supply line 41 . In this regard, the unloader valve 13 may be configured to open according to the maximum supply pressure of the compressed air supply line 41 .

On the other hand, the compressed air introduced through the first port 36 of the second electronic control valve is branched at the branch point 58 and is characterized in that it is supplied to the second control input line 27 . This second control input line 27 is another control input that connects to the regeneration sequence valve, so that as the second electronic control valve is switched to the second position, the compressed air in the regeneration supply line is switched to the second electronic control valve. is supplied to the second control input line through Therefore, a preferred embodiment of the present invention is characterized in that compressed air is supplied via two control input lines connected to the regeneration sequence valve, namely a first control input line 26 and a second control input line 27 . .

Basically, a regenerative sequence valve device according to a preferred embodiment of the present invention includes a valve structure whose opening/closing operation is controlled by two control inputs. The regeneration sequence valve may be set to open only when a control input is applied through both the first control input line 26 and the second control input line 27 . Accordingly, the regeneration sequence valve 16 in the present invention can selectively open the regeneration line 45 by control inputs by two electronic control valves, and is preferably installed on the upstream side of the regeneration line 45 . It may be a normally closed valve.

Looking at the basic structure of the regeneration sequence valve 16 in relation to this, the regeneration sequence valve 16 in the present invention includes a spring that closes the internal flow path in a normal state, and the spring is closed by the air pressure introduced from the input side. It is configured so that the valve can be opened by pressing. The air supplied to the regeneration sequence valve 16 through the previous first control input line 26 and the second control input line 27 is configured to press the spring, and when the spring force of the spring is overcome, It is configured to open the flow path inside the valve by pushing the spring. For example, in the regeneration sequence valve, in consideration of the pressure condition through the first control input line 26 and the condition of the second control input line 27 during regeneration, pressure is applied from only one of the two input lines. It is preferably set to be opened only when the pressure of both input lines is applied. At this time, the two electronic control valves may be opened at the same time, and more preferably, pressure is applied through the first control input line 26 so that the pressure is primarily introduced into the valve (ie, the first electronic control valve 31 ). ) is first opened), and then pressure is introduced through the second control input line 27 (that is, the second electronic control valve 31 is opened in a second order). In this case, since the pressure increase of the regeneration sequence valve is performed in stages, it is possible to improve the durability of the valve.

Accordingly, when the valve internal flow path is opened when the set pressure of the regeneration sequence valve is reached, the compressed air that has passed through the first electronic control valve 31 and the second electronic control valve 35 respectively passes through the first and second control input lines. It may be introduced into the internal flow path of the regeneration sequence valve through 26 and 27 , and may be supplied to the regeneration line 45 .

The opening conditions of the regeneration sequence valve are as follows. First, when the electronic control device 21 switches and controls the first electronic control valve 31 and the compressed air from the main supply line 42 flows into the control line 48 , the Part of the compressed air is supplied to the regeneration sequence valve 16 through the first control input line 26 . On the other hand, the set pressure of the regeneration sequence valve 16 is set higher than the pressure of the air introduced through the control line 48. Therefore, the pressure applied to the regeneration sequence valve gradually increases to exceed the set pressure until the spring is pressurized to open the flow path inside the valve. For example, when compressed air flows into the control input side of the regeneration sequence valve 16 , the regeneration sequence valve 16 is not opened unless another control is performed.

At this time, when the second control input line 27 is opened by switching the second electronic control valve 35 , a pressure exceeding the set pressure of the regeneration sequence valve 16 is formed, so that the regeneration sequence valve (16) is opened.

In this regard, the regeneration sequence valve may have a structure in which the flow path in the valve may be opened by maintaining a constant pressure according to the initial pressure level of the compressed air and then gradually increasing the pressure in the valve to the set pressure of the valve. To this end, the regeneration sequence valve 16 is set to a set pressure higher than the pressure of the compressed air in the main supply passage, and preferably after a predetermined time delay after the opening of the first electronic control valve 31, the regeneration sequence valve ( 16) can be set to open.

In addition, the regeneration sequence valve 16 is connected to the regeneration line 45 in which the regeneration check valve 17 is installed, and the filter cartridge 14 flows back through the regeneration line 45 . The regeneration check valve 17 is configured to prevent the backflow of air in the regeneration line 45 , and the compressed air that has passed through the filter cartridge 14 in the supply stage does not flow back through the regeneration line 45 and is the main It functions to be supplied only to the check valve 15 side. In the regeneration process, the air flowing back through the filter cartridge 14 flows toward the compressed air supply line 41 , passes through the unloader valve 13 , and is discharged to the atmosphere through the exhaust port 52 . In addition, a throttle 18 may be disposed on the regeneration line 45 , and the throttle 18 is configured as a conduit for narrowing a portion of the tube diameter of the regeneration line 45 . As it passes through the throttle 18, the pressure of the compressed air flowing into the filter cartridge 14 is reduced.

In addition, the regeneration line 45 may include a junction 55, which may be connected to a sep cooler through a sep cooler exhaust line 46 and a sep cooler inlet port 54 connected to the junction 55. . The sep cooler is for filtering foreign substances such as oil contained in the air flowing into the compressor. Therefore, after compressed air is supplied through the sep cooler exhaust line 46 branched between the regeneration check valve 17 and the regeneration sequence valve 16, through the inside of the sep cooler and through the exhaust port of the sep cooler is emitted Therefore, while regenerating the filter cartridge 14 in the regeneration step, it is possible to simultaneously discharge the foreign substances remaining in the sep cooler.

In addition, the second electronic control valve 35 is controlled by the electronic control device 21 to pre-open the unloader valve 13 before the regeneration sequence valve 16 opens the regeneration line 45 . It is desirable to be controlled. Through this, regeneration is performed in a state in which the compressed air on the compressed air supply line 41 is sufficiently exhausted, so that regeneration efficiency can be improved.

For example, the electronic control device 21 may switch and control the first electronic control valve 31 and the second electronic control valve 35 at the same time, and through this, before the regeneration sequence valve 16 is opened , the opening of the unloader valve 13 and the transition of the compressor to the unloaded state can be completed.

Hereinafter, an operation of the compressed air processing apparatus according to the present invention will be described with reference to FIG. 1 according to the first embodiment of the present invention.

First, in FIG. 1 , the first electronic control valve 31 and the second electromagnetic control valve 35 are respectively positioned at the first positions, and the compressed air is supplied.

In FIG. 1 , since the two electronic control valves 31 and 35 are both operated, the regeneration line is in a deactivated state. Specifically, in a state in which power is not applied to the first electronic control valve 31 , the first port 32 of the first electronic control valve 31 is connected to the vent 53 through the third port 34 , , because the pressure between the first port 32 and the regeneration sequence valve 16 does not reach the set pressure of the regeneration sequence valve 16, the regeneration sequence valve 16 is closed, that is, the regeneration line 45 is closed. It is kept closed by the regeneration sequence valve 16 .

On the other hand, when cartridge regeneration is required, by opening the first and second electronic control valves 31 and 25 simultaneously or sequentially, the regeneration sequence valve 16 is opened to the filter cartridge side through the regeneration line. Regeneration is performed by supplying compressed air.

In the present embodiment, the regeneration sequence valve 16 is configured such that when the air that has passed through the first electronic control valve 31 flows into the third control input line 26 of the regeneration sequence valve 16, the introduced air enters the regeneration sequence. The valve 16 is configured to transmit pressure in the direction of compressing the inner spring 25 . In addition, as the second electronic control valve 35 is switched to the second position and controlled to be switched, air is introduced through the fourth control input line 27 of the regeneration sequence valve 16 , and similarly, the The pressure is transmitted in the direction that compresses the inner spring. If the preset operating pressure of the regeneration sequence valve 16 is reached, that is, the set pressure, a flow path in the valve connected to the regeneration line 45 is formed while overcoming the restoring force of the spring. Therefore, through the regeneration sequence valve 16, a time delay is generated by the time required to reach the set pressure, so that the unloader valve 13 is first opened by the second electronic control valve 35 playback takes place in

For example, when the two electronic control valves 31 and 35 are sequentially controlled, when the first electronic control valve 31 is switched and controlled to the second position, the control input is transmitted to the compressor control outlet 51 side. At the same time, compressed air is also supplied to the third control input line 26 of the regeneration sequence valve 16 . However, even at this time, since the pressure of the regeneration sequence valve 16 does not reach the set pressure, the regeneration line 45 is not opened.

Thereafter, when additional pressure is supplied through the fourth control input line 27 as the second electronic control valve 35 is opened, as the pressure to the control input line 26 of the regeneration sequence valve 16 increases, the set pressure is reached. Accordingly, the regeneration sequence valve 16 is opened and the regeneration step is carried out while compressed air is supplied to the filter cartridge 14 side. At this time, as the second electronic control valve is switched to the second position, the unloader valve 13 is already open.

Therefore, according to a preferred embodiment of the present invention, the second electronic control valve 35 first opens the unloader valve 13 according to the switching control by the electronic control device 21, and then the regeneration sequence The time delay of the valve 16 is operative to open the regeneration line 45 .

On the other hand, when regeneration is finished, the electronic control device 21 may be configured to perform a return control for maintaining the system internal pressure. This return control can be executed in such a way as to delay the point in time when the first electronic control valve returns to the first position. Preferably, upon completion of regeneration, the second electronic control valve 35 is turned off to restore the second electronic control valve to the first position, while the first electronic control valve 31 is in an on state, that is, the second position. This is achieved by implementing control to maintain. In this case, since the unloader valve 13 is closed again according to the closing of the second electronic control valve 35, it suppresses the compressed air discharge through the compressed air supply line 41, so that the pressure inside the system can be quickly increased have.

Hereinafter, a specific example of a regeneration sequence valve device according to a preferred embodiment of the present invention will be described with reference to FIGS. 2 to 10 . In this regard, FIG. 2 is an exploded view showing the main configuration of a regeneration sequence valve device according to a preferred embodiment of the present invention, and FIGS. 3 to 5 show an example of a regeneration sequence valve device according to the first preferred embodiment of the present invention. will show In particular, FIGS. 3 to 5 are all cross-sectional views of the regeneration sequence valve device having the same configuration, in which FIG. 3 shows a state in which the regeneration sequence valve device is closed, and FIG. 4 is a state in which the regeneration sequence valve device is fully opened. will show Also, FIG. 5 shows an internal cross-section of the regeneration sequence valve device in a state in which the regeneration sequence valve device is opened and then closed again.

The regeneration sequence valve device according to a preferred embodiment of the present invention is a valve body 100 having an internal space, inserted and fixed in the internal space of the valve body 100, and a valve shaft assembly that opens and closes by receiving a control input by compressed air 200 and the valve cover 300 fixedly mounted on the upper end of the valve body 100 .

2 is an exploded perspective view of these main components, showing the valve shaft assembly 200 and the valve cover 300 excluding the valve body 100 .

Referring to FIG. 2 , the valve shaft assembly 200 includes a housing 220 inserted into the valve body 100 , a valve shaft 210 accommodated in the housing 220 , and fixed on the housing 220 . and an adapter 230 mounted on the valve shaft 210 for urging the spring member 240 to be formed. In addition, a piston member for forming the damping chamber C3 is mounted on the valve shaft 210 , and a fixing clip 250 for fixing the adapter 230 may be installed. A shaft head part 211 for opening and closing the regeneration sequence valve device is formed below the valve shaft 210 to extend in the radial direction of the shaft, and the spring member 240 is formed by a control input applied to the shaft head part 211 . can be compressed. A first chamber C1 and a second chamber C2 to which control inputs input according to the opening of two control valves can be respectively input are formed in the valve shaft assembly 200, and two chambers input to these chambers are formed. The valve shaft 210 is configured to be lowered while compressing the spring member 240 by the control input. In addition, the damping cover 310 for controlling the pressure of the damping chamber C3 may be mounted on the valve cover 300 . In particular, in the regeneration sequence valve device, the first control input unit 16a that receives a first control input of compressed air for valve opening according to the operation of the first electronic control valve, and the second electronic control valve open according to the operation of the valve A second control input unit 16b for receiving a second control input of compressed air for It can be configured to be opened by a control input. Both the first electronic control valve and the second electronic control valve used in driving control of the regeneration sequence valve device according to the preferred embodiment of the present invention may be electronically controlled valves. It may also be a mechanically controlled valve in conjunction. Hereinafter, the valve 31 and the valve 35 are referred to as a first control valve and a second control valve, respectively.

Hereinafter, a detailed configuration of a regeneration sequence valve device according to a preferred embodiment of the present invention will be described with reference to FIGS. 3 to 5 , and an opening/closing operation of the regeneration sequence valve device will be described.

First, each configuration constituting the regeneration sequence valve device will be described with reference to FIG. 3 showing the closed valve state of the regeneration sequence valve device.

The valve body 100 and the valve cover 300 in the present invention function as an outer case of the regeneration sequence valve device. The valve body 100 may be a structure integrally manufactured on the compressed air processing apparatus, or may be manufactured as a separate product and mounted on the compressed air processing apparatus.

The valve body 100 has an inner space to accommodate the valve shaft assembly 200, and the bottom of the inner space is connected to the outlet port 16c of the regeneration sequence valve device. In addition, a first inlet connected to the first control pressure line 26 may be formed in the valve body 100 so that compressed air may be introduced from the side of the first control valve. This first inlet is an inlet of compressed air for applying a control input to the first control input 16a.

In addition, a second inlet connected on the second control pressure line 27 may be formed so that compressed air from the second control valve side may be introduced. This second inlet is an inlet of compressed air for applying a control input to the second control input unit 16b.

Accordingly, into the internal space of the valve body 100, two types of compressed air control inputs for lowering the valve shaft 210 through the first inlet and the second inlet are applied to the first chamber C1 and the second chamber C2. can be introduced into

Preferably, the inner space of the valve body 100 has a cylindrical structure, and the housing 220 of the valve shaft assembly 200 may be inserted into the inner surface of the cylindrical inner space.

In addition, the valve cover 300 is configured to be mounted on the upper portion of the valve body 100 , and according to an embodiment of the present invention, a spiral groove is formed on the upper inner surface of the valve body 100 , and this spiral The valve cover 300 may be configured to be screwed into the groove. Although not shown in FIG. 3 , a sealing member (not shown) may be inserted between the valve cover 300 and the valve body 100 to form airtightness between the two elements.

The valve cover 300 is provided to form a damping chamber C3 to provide different pressure behaviors of the valve shaft assembly 200 when the regeneration sequence valve device is opened and closed, respectively. Specifically, the valve cover 300 is configured such that a cylindrical lower groove 301 is formed, and a portion of the valve shaft assembly 200 can be inserted into the lower groove 301 . As shown in FIG. 3 , the piston part 260 may be mounted on the upper portion of the valve shaft assembly 200 , and the piston part 260 is a seal forming an airtight seal with the inner wall of the lower groove 301 of the valve cover 300 . may be absent. The piston 260 forms an inner space while in contact with the inner outer peripheral surface of the lower groove 301 of the valve body 100 . Specifically, the piston part 260 of the valve shaft assembly 200 is vertically inserted into the lower groove 301 of the valve cover 300 to increase the internal volume according to the opening and closing operation of the valve shaft assembly 200 . A variable damping chamber C3 may be formed.

The damping chamber C3 is a space formed by the lower groove 301 and the piston part 260 of the valve cover 300 , and is connected to the outside air side by one or more openings 320 formed in the valve cover 300 . can The openings 320 formed on the valve cover 300 may be opened and closed by the damping cover 310 , and when the damping chamber C3 is opened by the openings 320 , the damping chamber C3 . The internal pressure can be calibrated to atmospheric pressure.

In this regard, the damping cover 310 may have a structure in which a cover member 312 for an opening capable of covering the opening 320 and a relay shaft 311 are combined, and the opening ( When the 320 is closed, the air inside the damping chamber C3 may be restricted from being discharged through the closed opening 320 . As shown in FIG. 3 , the relay shaft 311 may be a shaft inserted into an insertion hole formed in the valve cover, and preferably, the mounting position of the opening cover member 312 may be fixed by the fixing protrusion 313 . have. A detailed operation of the damping cover 310 will be described later.

On the other hand, according to a preferred embodiment of the present invention, when the valve shaft assembly 200 operates to be closed again in an open state, at least a portion of the opening 320 of the valve cover 300 is closed. When the opening 320 of the valve cover 300 is closed, compared to when the valve is opened, the cross-sectional area of the opening 320 through which the pressure inside the damping chamber C3 escapes is reduced, so that only a small amount of air can be discharged to the outside air. have. This may act as a resistance to the elevation of the valve shaft assembly 200 , prevent the sudden elevation of the valve shaft assembly 200 , and contribute to improving the durability of the regeneration sequence valve device.

Here, the term “at least a part of the openings” may mean some openings among the plurality of openings in an example in which a plurality of openings are formed. have.

Also, even when a plurality of openings are formed, it may mean that any one of these openings or a partial region of two or more openings is closed. Accordingly, in the present invention, when at least a part of the opening is closed means all cases in which the opening area is further reduced when the regeneration sequence valve device is closed compared to when the regeneration sequence valve device is opened.

At least one opening for communicating the damping chamber C3 with outside air may be formed on the valve cover 300 , and preferably, two or more openings may be formed to allow outside air to flow smoothly.

On the other hand, the valve shaft assembly 200 includes a hollow housing 220 installed in the valve body 100 to guide the vertical movement of the valve shaft 210 , and the housing 220 in the internal space of the valve body 100 . It may include a valve shaft 210 that can move up and down while being guided. In addition, the valve shaft assembly 200 is fixedly mounted to the valve shaft 210 , and an adapter 230 and the adapter 230 and the valve housing 220 that operate integrally with the valve shaft 210 in the housing 220 . and a spring member 240 mounted therebetween and biased in response to a control input by the first control input 16a and the second control input 16b.

First, the housing 220 of the valve shaft assembly 200 may have a hollow cylinder shape having a multi-stage structure having different inner diameters. In particular, according to a preferred embodiment, the housing 220 is opened to form the upper guide portion 221 for guiding the valve shaft 210 and the adapter 230 , and the first chamber C1 . It has a structure, and may include an opening 222 of the middle portion communicating with the first inlet of the valve body 100 . In addition, the housing 220 may include a lower valve seat portion 223 to which the shaft head portion 211 of the valve shaft 210 may be closely or spaced apart according to the elevation of the valve shaft 210 .

The guide part 221 of the housing 220 corresponds to the outer circumferential surface of the adapter 230 and the outer circumferential surface of the valve shaft 210, respectively, as shown in FIG. It may be formed to have a first guide surface 221a and a second guide surface 221b for guiding the outer peripheral surface of the adapter 230 . At this time, the adapter 230 is additionally attached to the outer circumferential surface of the valve shaft 210, and preferably, the second guide surface 221b is smaller than the inner circumferential surface of the housing 220 forming the first guide surface 221a. The inner diameter of the inner circumferential surface of the housing 220 to be formed may be smaller.

In addition, a seating surface is formed on the bottom surface of the guide part 221 of the housing 220 so that one end of the spring member 240 can be seated, and at this time, the other end of the spring member 240 is predetermined by the adapter 230 . may be configured to be compressed according to a bias amount of .

Sealing members for forming airtightness with the valve body 100 side may be mounted on the outer circumferential surface of the housing 220, and preferably, as shown in FIG. 3, with the first chamber C1 interposed therebetween, the housing ( One sealing member 272 may be installed in the valve seat part 223 of 220 , and another sealing member 271 may be installed in the guide part 221 of the housing 220 .

In addition, since the compressed air flowing into the first chamber C1 must be configured to pressurize the shaft head portion 211 of the valve shaft 210 , for this purpose, the valve seat portion 223 of the housing 220 and the valve A flow path for providing the first control input unit 16a may be formed between the shafts 210 . In addition, a discharge chamber C4 connected to the outlet port 16c is formed between the bottom of the housing 220 and the valve body 100, and as the valve shaft 210 is lowered, the first chamber C1 is discharged into the discharge chamber ( C4) can be communicated.

Next, the valve shaft 210 has a shaft shape that is movable up and down in the housing 220, and is engaged with the valve seat portion 223 of the housing at the lower portion of the housing 220 to regulate the air flow from the first chamber C1. A shaft head portion 211 for this may be formed. The shaft head part 211 has a disk-shaped structure extending from the lower end of the valve shaft 210 in the radial direction, and a sealing member 275 for forming airtightness with the valve seat may be mounted thereon. Accordingly, the first chamber C1 may be closed by the sealing member 275 of the shaft head part 211 in a normal state to which a control input is not applied.

A discharge passage 224 is formed between the shaft head portion 211 of the valve shaft 210 and the valve seat portion 223, and when the valve is opened, the discharge passage is directed toward the discharge chamber C4 and the outlet port 16c through this discharge passage. Compressed air may be vented. That is, as shown in FIGS. 3 and 4 , the first control input applied by the first control input unit 16a acts on the shaft head unit 211 in the downward direction of the valve shaft 210 . However, the structure of the shaft head unit 211 is only an example, and if the flow path between the valve seat unit 223 and the shaft head unit 211 can be intercepted according to the descending of the valve shaft 210 , it is possible to It can be applied without limitation.

In addition, the adapter 230 may be assembled to the upper end of the valve shaft 210 . The adapter 230 may be integrally formed with the valve shaft 210 , but it is more preferable to be manufactured as a separate product in consideration of the assembling property of the valve shaft assembly 200 .

The adapter 230 may have a ring shape inserted into the valve shaft 210 , and the adapter 230 inserted into the valve shaft 210 is fixed while being seated on the shoulder portion 212 of the valve shaft 210 . The clip 250 may be fixed to the valve shaft 210 .

As shown in FIG. 2 , one side of the fixing clip 250 is open, and the adapter 230 can be fixed by inserting the open end of the fixing clip 250 into the groove of the valve housing 220 . Accordingly, the adapter 230 supported downward by the shoulder portion 212 of the valve shaft 210 is limited in movement by the fixing clip 250 , and thus the adapter 230 operates integrally with the valve shaft 210 . can do. In addition, a portion of the adapter 230 may be exposed toward the second chamber C2 through the open end of the fixing clip 250 , and thus the adapter 230 may be subjected to a second control input applied into the second chamber C2. ) can be lowered. In addition, the fixing clip 250 may be directly exposed in the second chamber C2, and through this, the fixing clip 250 itself may be configured to receive a force for lowering the valve shaft 210 by compressed air. Accordingly, the second control input applied by the second control input unit 16b may act on the adapter 230 in the downward direction of the valve shaft 210 either directly or indirectly through the fixing clip 250 .

In addition, a sealing member 273 for airtightness may be fitted between the adapter 230 and the housing 220 , and a sealing member 274 for forming airtightness also between the adapter 230 and the valve shaft 210 . can be inserted. These sealing members 273 and 274 provide airtightness to the first chamber C1, and thus function so that the first chamber C1 and the second chamber C2 can be physically separated. For reference, unexplained reference numerals 215, 225, 226, and 235 are grooves formed in the respective components so that the sealing member can be inserted.

The specific opening/closing operation of the regeneration sequence valve device having the above configuration will be described with reference to FIGS. 3 to 5 illustrating different operating states.

First, FIG. 3 shows a normal state in which the regeneration sequence valve device is closed. In this case, there may be no control input for opening the valve, that is, both the first control valve and the second control valve may be closed or only one of the two control valves may be open.

In this closed state, the control input provided through the first control input unit 16a and the second control input unit 16b cannot overcome the biased state of the spring member 240, and thus the valve maintains the closed normal state. will keep

Meanwhile, FIG. 4 shows a state in which the regeneration sequence valve device is fully opened, which means a state in which the spring member 240 is compressed because both the first control valve and the second control valve are opened. At this time, the second control input by the compressed air flowing into the second chamber C2 may be configured to lower the valve shaft 210 and not move toward the outlet port 16c.

On the other hand, the compressed air flowing into the first chamber C1 presses the shaft head 211 and moves toward the discharge chamber C4 through the discharge passage 224, and finally out through the outlet port 16c. is emitted 1, it is connected to the filter cartridge side through the regeneration line 45, thus regenerating the filter cartridge.

At this time, the damping cover 310 opens the opening 320 , and external air flows into the damping chamber through the open opening 320 , and thus the amount of air in the damping chamber may increase.

Referring to the example of FIG. 4 , the opening cover member 312 may be made of a flexible member.

When the valve is opened, as the piston part 260 mounted on the valve shaft 210 descends, the internal pressure of the damping chamber may decrease. Due to the decrease in pressure inside the damping chamber, the flexible opening cover member 312 fixed to the relay shaft 311 is pushed downward to open at least a portion of the opening 320, and the opened opening 320 is closed. outside air can be introduced through the

On the other hand, as in FIG. 5 , when the control input is lost and the valve shaft assembly 200 descends and then rises again, the opening cover member 312 is in close contact with the valve cover 300 again due to the increase in pressure inside the chamber. will do Accordingly, the opening 320 that was opened by the opening cover member 312 is closed again, and the air discharge is restricted due to the closed opening 320 , and the damping chamber restricts the upward movement of the valve shaft 210 . acts as a resistance.

Meanwhile, FIG. 6 is a cross-sectional view of a regenerative sequence valve device according to another preferred embodiment of the present invention. The example of FIG. 6 is an example in which a non-flexible opening cover member is used instead of a flexible opening cover member. . Accordingly, in the example of FIG. 6 , the opening cover member 312 cannot open the opening 320 in response to a pressure change in the damping chamber. Instead, in the example of FIG. 6 , the relay shaft 311 itself is configured to be raised and lowered. In one embodiment of the present invention, a separate actuator may be provided for raising and lowering the relay shaft 311. In this example, when both the first and second control valves are opened, the actuator moves the relay shaft 311. It is lowered, and when the lowering condition is finished, it can be controlled to raise the relay shaft 311 again.

Meanwhile, in another example of FIG. 6 , a portion of compressed air provided as a control input may be provided without a separate actuator and used as a power source for lowering the relay shaft 311 . In this case, an appropriate structure such as a throttle may be added to prevent direct entry of high-pressure compressed air. Unlike the lowering of the relay shaft 311 , no separate power is required during the ascending, and as in the example of FIG. 4 , the damping cover 310 by increasing the pressure in the damping chamber by the piston 260 . ) can be increased.

Next, with reference to FIGS. 7 to 10, preferred examples of the cover member for opening for intermittent damping chamber (C3) will be described. An example in which four openings 320 are formed is described in FIGS. 7 to 9 , and an example in which one auxiliary opening 330 is formed together with four openings 320 is described in FIG. 10 . Meanwhile, in the above example, the number of the opening and the auxiliary opening is only one example, and the number of each may be appropriately changed. However, in order to sufficiently obtain space efficiency and the damping effect of the damping chamber C3, it is preferable that four or more openings are formed. In addition, the cross-sectional area of the opening in each example is also only one example, and it may be configured to include a plurality of openings having different cross-sectional areas.

First, FIG. 7 shows an example of a cover member for an opening that closes the entire opening 320 . In the present embodiment, four openings 320 having the same cross-sectional area opened and closed by the opening cover member 312 are formed on the valve cover 300 . In the example of FIG. 7 , the opening cover member 312 covers all the four openings 320 , and in this embodiment, a separate auxiliary opening is not formed. In addition, it is preferable that the opening cover member 312 has a relatively small overlapping area with the opening 320 , and through this, when the valve is opened and then closed, the flexible opening cover member is folded and some air may function to be discharged to the outside. Through this, the damping chamber C3 may return to atmospheric pressure.

Meanwhile, FIG. 8 illustrates an example in which a cutout is formed in the opening cover member 312 so that a partial area of one of the four openings 320 is not closed by the opening cover member 312 . In this example, air may be discharged to the outside air only through a partial area of the opening 320 that is not closed by the opening cover member 312 .

In addition, FIG. 9 shows an example in which a cutout is formed in the cover member 312 for opening so that one of the four openings 320 is not closed by the cover member 312 for the opening. Likewise, in this example, air can be discharged to the outside air side only through one opening that is not closed by the opening cover member 312 .

Meanwhile, FIG. 10 shows an example including an opening cover member 312 that closes the entire opening 320 and an auxiliary opening 330 that is not closed by the opening cover member 312 .

The example of FIG. 10 is basically the same as the example of FIG. 7 , but an auxiliary opening 330 having a small diameter is additionally formed on the valve cover 300 . The auxiliary opening 330 is formed to connect the outside air side and the damping chamber C3 , and the auxiliary opening 330 is spaced apart from the opening cover member 312 so as not to be closed by the opening cover member 312 . can be formed. Accordingly, when the valve is opened and then closed, air can be discharged to the outside only through the auxiliary opening 330 , and the function of the damping chamber can be maximized through this example.

In the above, the present invention has been described in detail based on the embodiments and the 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 contents described in the claims described below.

1: compressed air handling unit 10: dryer unit
11: Compressed air inlet 12: Compressed air additional inlet
13: unloader valve 14: filter cartridge
15: main check valve 16: regeneration sequence valve
16a: first control input 16b: second control input
16c: exit port
17: regenerative check valve 18: throttle
21: electronic control unit 22, 23, 24: pressure sensor
31: first electronic control valve 35: second electronic control valve
41: compressed air supply line 42: main supply line
43: first supply line 44: second supply line
45: regeneration line 46: sep cooler exhaust line
47: exhaust line 51: compressor control outlet
52: exhaust port 53: vent
54: sep cooler inlet port 70: valve assembly
71, 72, 73, 74, 75: overflow valve
100: valve body 200: valve shaft assembly
210: valve shaft 211: shaft head portion
220: housing 230: adapter
240: spring member 250: retaining clip
260: piston part 300: valve cover
310: damping cover 320: opening
C1: first chamber C2: second chamber
C3: chamber for damping C4: exhaust chamber

Claims (15)

A regeneration sequence valve device installed on a regeneration line of a compressed air treatment device for a commercial vehicle,
a valve body having an internal space;
a valve shaft assembly which is inserted and fixed in the inner space of the valve body and opens and closes by receiving a control input by compressed air; and
Including; a valve cover fixedly mounted on the upper end of the valve body;
The piston part of the valve shaft assembly is vertically inserted into the lower groove of the valve cover to form a damping chamber whose internal volume is variable according to the opening and closing operation of the valve shaft assembly,
One or more openings for connecting the damping chamber to the outside are formed in the valve cover, and a cover member for openings is mounted on the valve cover to open and close at least a part of the opening,
When the valve shaft assembly operates to be closed again from an open state, as at least a portion of the opening is closed by the opening cover member, the cross-sectional area of the opening connecting the damping chamber to the outside is reduced to reduce the damping A regeneration sequence valve device for a compressed air treatment device of a commercial vehicle, characterized in that it restricts the air inside the chamber from being discharged to the outside through the opening.
The method according to claim 1,
In the regeneration sequence valve device,
a first control input unit receiving a first control input of compressed air for opening the valve according to an operation of the first control valve;
A second control input unit for receiving a second control input of compressed air for opening the valve according to the operation of the second control valve; is formed;
and the valve shaft assembly is opened by a control input inputted to the first control input unit and the second control input unit.
3. The method according to claim 2,
The valve shaft assembly comprises:
a valve shaft movable up and down in the inner space of the valve body;
a hollow housing installed in the valve body to guide the vertical movement of the valve shaft;
an adapter fixedly mounted to the valve shaft and operated integrally with the valve shaft in the housing; and
and a spring member mounted between the adapter and the housing and biased in response to a control input by the first control input unit and the second control input unit. Device.
4. The method according to claim 3,
A shaft head portion is formed extending radially at a lower end of the valve shaft so as to interrupt the flow path formed between the housing and the housing according to the vertical movement of the valve shaft,
the first control input applied by the first control input is configured to act on the shaft head in a descending direction of the valve shaft;
and the second control input applied by the second control input unit is configured to act on the adapter in a descending direction of the valve shaft.
4. The method according to claim 3,
the valve shaft assembly further comprises a retaining clip for securing the adapter to the shaft;
The adapter is formed in a ring shape that is inserted into the valve shaft,
The adapter inserted into the valve shaft is fixed to the valve shaft by the fixing clip while being seated on the shoulder of the valve shaft.
6. The method of claim 5,
The housing includes a first guide surface for guiding an outer circumferential surface of the valve shaft;
The regeneration sequence valve device for a compressed air treatment device of a commercial vehicle, characterized in that it is formed to have a second guide surface for guiding the outer circumferential surface of the adapter.
5. The method according to claim 4,
A first chamber into which the compressed air of the first control input is introduced is formed in the housing, and the first chamber is closed by the shaft head when the first control input and the second control input are not applied. ,
A discharge chamber connected to an outlet port is formed between the housing bottom and the valve body,
As the valve shaft descends, the first chamber communicates with the discharge chamber.
delete 3. The method according to claim 2,
The opening cover member is mounted on a relay shaft passing through the valve cover,
and the relay shaft opens at least a part of the opening while moving downward when both the first control valve and the second control valve are opened.
The method according to claim 1,
The opening is formed to connect the outside air side and the damping chamber,
The piston part is a sealing member forming an airtight seal with the inner wall of the lower groove of the valve cover,
The regeneration sequence valve device for a compressed air treatment device for a commercial vehicle, wherein the opening cover member is made of a flexible member.
11. The method of claim 10,
When the internal pressure of the damping chamber is lowered according to the descending of the valve shaft assembly, the opening cover member is configured to introduce external air through the opening while being depressed downward,
and when the valve shaft assembly descends and then rises again, the opening cover member is configured to close at least a portion of the opening by closely contacting the valve cover.
11. The method of claim 10,
The regeneration sequence valve device for a compressed air processing device for a commercial vehicle, wherein the opening cover member can open and close the entire opening.
12. The method of claim 11,
The opening consists of two or more,
The regeneration sequence valve device for a compressed air treatment device of a commercial vehicle, characterized in that the opening cover member is formed to prevent closing of at least one of the openings.
12. The method of claim 11,
The opening consists of two or more,
The regeneration sequence valve device for a compressed air treatment apparatus of a commercial vehicle, wherein the opening cover member is formed to prevent a partial area of one of the openings from being closed.
12. The method of claim 11,
In the valve cover,
An auxiliary opening is formed to connect the outside air side and the damping chamber, the auxiliary opening having a smaller cross-sectional area than the total cross-sectional area of the opening;
and the auxiliary opening is formed to be spaced apart from the opening cover member so as not to be closed by the opening cover member.

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