KR20110070191A - Structure of relief valve for hydrogen compressor - Google Patents

Abstract

PURPOSE: A relief valve structure for hydrogen compressor is provided to the damage and abrasion of housing inlet due to frequent reciprocating motions by reducing the closing speed of an inlet. CONSTITUTION: A relief valve structure for hydrogen compressor comprises an inlet(20), an outlet(21), an elastic member adjusting screw(30), a valve member(50), and a cushion ring(60). The elastic member adjusting screw is fixed and coupled in one end of the housing. An elastic member(40), which is built-in in a housing, is connected to the other end of the elastic member adjusting screw. One end of the valve member is put in the elastic member. The other end of the valve member is touched with the inlet to open and close the inlet. The cushion ring reduces an oil flow path of the inlet.

Description

Structure of Relief Valve for Hydrogen Compressor

The present invention relates to a relief valve structure for a hydrogen compressor, in which a relief valve used in a hydrogen compressor can reduce internal noise and abrasion caused by rapid response.

Hydrogen gas compressor is a device that compresses and stores hydrogen generated in oil refining and chemical process to gas supplier through gas pipe and compresses and stores in gas transportation cartridge vehicle in gas supplier. One stage suction pressure (20 ~ 25KG / CM2G). It is a device that boosts to (200KG / CM2G.) By receiving two-stage gas and supplies it to automobiles or fuel cells by compressing hydrogen supplied from hydrogen gas manufacturing facility to high pressure. Alternatives developed to prevent rising energy prices due to reduced fuel reserves and increased consumption, the need for alternative energy development due to the crisis of energy supply and demand, and the increase of environmental pollution index due to transportation energy, which accounts for a large part of domestic energy demand. It is a device for increasing the efficiency of hydrogen gas which is energy.

Referring to the driving principle of the hydrogen gas compressor with reference to Figures 1 to 2, Figure 1 is a schematic diagram of an embodiment showing a conventional hydrogen compressor driving mechanism when the piston is the highest point, Figure 2 is a conventional hydrogen compressor when the piston is the lowest point As a schematic diagram of an embodiment showing a driving mechanism, as shown in the figure, when the crankshaft rotates like an engine of an automobile, the piston 111 in the administration chamber 110 moves up and down, wherein the piston 111 is When the pressure rises to the highest point, when the pressure of oil between the diaphragm 112 and the piston 111 rises, the low pressure hydrogen gas introduced is compressed, and the piston 111 in the hydrogen compressor drops to the lowest point. The opposite happens.

However, as mentioned above, when the piston 111 rises to the highest point, since the pressure of the oil between the diaphragm 112 and the piston 111 rises, in order to keep the pressure of the said oil constant, the relief valve 100 is required.

Normally, the pressure of the hydrogen compressor required at the hydrogen station is required to be ultra high pressure of at least 450 kg / cm 2 G and up to 700 kg / cm 2 G to 1,000 kg / cm 2 G, in order to maintain this pressure. Since the set pressure of the relief valve to be used should be more than 1,000㎏ / ㎠G, it is necessary to develop an ultra-high pressure relief valve.

That is, as described above, the relief valve used in the hydrogen compressor should be excellent in response because it is used at very high pressure. However, stability should be achieved before responsiveness and noise should be avoided.

In the case of the relief valve 100 conventionally used in the hydrogen compressor due to the rapid response and negative pressure generated, as shown in Figure 3, the valve member 101 to reciprocate in the relief valve 100 is When the inlet 102 is closed, abrasion and damage occurs in the contact portion (P) with the inlet, there was a problem that also causes severe noise.

Therefore, it is possible to secure the stability of the relief valve used in the hydrogen compressor, the situation is developing a structure of the relief valve that can reduce the noise.

The present invention has been made to solve the above problems, an object of the present invention is the valve member in the relief valve reciprocating in the longitudinal direction by the high pressure oil pressure flowing from the hydrogen compressor, frequent reciprocating motion and fast Due to the responsiveness, hydrogen is generated between the valve member and the inlet portion of the housing in contact with the valve member to reduce the problem of shortening the life of the relief valve and the generation of severe noise at the contact portion. A relief valve structure for a compressor is provided.

Other objects and advantages of the present invention will be described hereinafter and will be understood by the embodiments of the present invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the claims.

The present invention is a means for solving the above problems, in the hydrogen compressor which compresses the diaphragm through the reciprocating motion of the piston, converts the low-pressure hydrogen gas intake to a high pressure state, discharge the piston to reach the highest point In the structure of the relief valve for the hydrogen compressor for releasing the rising pressure of the oil in the hydrogen compressor, the inlet and outlet through which the high-pressure oil compressed between the diaphragm and the piston flows in and out; An elastic member adjusting screw part connected to one end of the housing and connected to the other end of the elastic member; A valve member having one end embedded in the elastic member and the other end contacting the oil inlet to open and close the inlet; A cushioning ring installed at an inner circumference of the inlet to reduce an oil flow path in the inlet; Characterized in that consists of.

In addition, the inlet is perforated in the housing so as to form a right angle with the outlet, the opening and closing in accordance with the movement of the valve member having the same center line as the inlet, characterized in that the communication with the outlet and disconnected.

In addition, the valve member has a base portion one end is fitted in the longitudinal direction to the elastic means; An inboard portion extending from the other end of the base portion to have a diameter smaller than that of the base portion, corresponding to a through hole formed in the center of the cushioning ring, and having a predetermined length embedded therein; An opening part protruding from the outer periphery of the base part and contacting or separating one end of the inlet according to whether oil is introduced through the inlet; . ≪ / RTI >

In addition, the valve member when the oil is increased through the inlet is increased in pressure, the valve member is reversed, the opening and closing portion is spaced from the inlet to compress the elastic member, so that the high-pressure oil can be discharged with the inlet When the outlet port is communicated and the pressure of the oil is released, the valve member is reversed, and the elastic member is brought back into contact with the inlet and the inlet, and the inlet and the outlet are disconnected.

In addition, the cushioning is formed by forming a through hole corresponding to the other end of the valve member in the center, so that when the inlet is closed by the valve member, the oil flowing to the outlet is returned through the through hole having a smaller diameter than the inlet. By reducing the inlet closing speed of the valve member by the amount of oil fed back to the through-hole, it is characterized in that the noise and abrasion generated during contact between the valve member and the inlet end.

In addition, the cushion ring is formed through the through hole corresponding to the other end of the valve member in the center, and formed a plurality of communication holes along the circumferential surface, when the inlet is closed by the valve member, the oil flowed to the outlet By returning only through the through hole and the communication hole having a smaller diameter than the inlet, the inlet closing speed of the valve member is slowed down by the amount of oil fed back to the through hole and the communication hole, and occurs when the valve member and the inlet end contact each other. Characterized in that noise and wear are reduced.

As described above, the present invention is a relief valve for maintaining a constant oil pressure in the hydrogen compressor when the piston in the hydrogen compressor reaches the highest point, in the inlet having the same center line as the valve member in the relief valve Cushioning is formed at the periphery to reduce the flow path of the oil, thereby slowing the inlet closing speed of the valve member by the oil flowing into the reduced flow path, resulting in the quick response of the relief valve and the occurrence of negative pressure. There is an effect that wear / damage and friction noise are not generated between the valve member and the inlet portion inside the valve.

Before describing the various embodiments of the present invention in detail, it will be appreciated that the application is not limited to the details of construction and arrangement of components described in the following detailed description or shown in the drawings. The invention may be embodied and carried out in other embodiments and carried out in various ways. It should also be noted that the device or element orientation (e.g., "front," "back," "up," "down," "top," "bottom, Expressions and predicates used herein for terms such as "left," " right, "" lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation.

The present invention has the following features to achieve the above object.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

Hereinafter, the relief valve structure for the hydrogen compressor according to the preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5.

As shown, the relief valve structure for the hydrogen compressor according to the present invention is the housing 10, the inlet 20, the outlet 21, the elastic member adjusting screw portion 30, the valve member 50, cushioning 60 It includes.

In the hydrogen compressor in which the relief valve 1 of the present invention is used, the internal piston is reciprocated, and when the piston reaches its highest point, when the pressure of oil between the diaphragm and the piston increases, the hydrogen compressor is used. The introduced low-pressure hydrogen gas is compressed and converted into a high-pressure hydrogen gas, which is well known as described in the background art, and no further detailed description will be given.

The inlet 20 is formed at one end of the housing 10 serving as a body of the relief valve, and since the housing 10 forms a perforation of the installation hole 11 in the longitudinal direction, the inlet 20 ) Denotes an open end of the installation hole 11, and the valve member 50 and the cushioning 60 to be described later are also formed inside the housing 10.

The inlet 20 is the pressure of the oil between the piston and the diaphragm reaching the highest point when the piston of the hydrogen compressor reaches the highest point (assuming that the piston is located at the top when assuming the up and down reciprocating motion) This rises and compresses the low pressure hydrogen gas, which is the place where the oil with increased pressure flows between the piston and the diaphragm.

The outlet 21 is for discharging the oil of the high pressure state introduced from the inlet 20 to a low pressure tank (not shown), and forms a right angle with the inlet 20 so as to communicate at one end. In addition, the communication between the outlet 21 and the inlet 20 is made by the valve member 50 inside the relief valve, which will be described in detail below.

The elastic member adjusting screw portion 30 is one end of the housing 10 is fitted to the other end, that is, the other end of the installation hole 11 is fixedly coupled, the elastic member adjusting screw portion 30 is a spring-shaped elastic member ( 40 is coupled to allow the elastic member 40 to be inserted into the installation hole 11 of the housing 10.

The valve member 50 has the same center line as the inlet 20 and is installed in the longitudinal direction inside the installation hole 11, and the elastic member 40 embedded in the installation hole 11 is wound around the outer circumference. Preferably, the base portion 51 is inserted into the elastic member 40 in the longitudinal direction, and the inner portion extending from the one end of the base portion 51 having a diameter relatively smaller than the diameter of the base portion 51 ( 52 and protruded from the outer periphery of the base portion 51 to support one end of the elastic member 40 fitted to the outer periphery of the base portion 51, and the elastic member 40 is tensioned to provide a valve. When the member 50 is moved to the inlet 20 side, the member 50 is formed of an opening and closing part 53 to seal the inlet 20.

That is, the valve member 50 is when the oil flowing through the inlet 20 is a high pressure and exceeds a predetermined pressure, as shown in Figure 4, to enter into the relief valve through the inlet 20 At this time, the valve member 50 is retracted in the longitudinal direction while pushing the opening / closing portion 53 on the side where the inner inlet is formed, and at the same time, the elastic member 40 is compressed.

In this case, the outlet 21 formed in the housing 10 in a right angle with the inlet 20 is in communication with the inlet 20 through the backward of the valve member 50, the inlet 20 The high pressure oil introduced into) is discharged into the low pressure tank through the outlet 21.

After that, if the pressure of the oil is kept constant, as shown in Figure 5, the amount of oil flowing into the inlet 20 is reduced, thereby, the pressure to reverse the valve member 50 also The elastic member 40, which has been compressed, is tensioned to return to its original shape, and the valve member 50 is also advanced to the inlet 20 to seal the inlet 20.

(However, as described above, since the responsiveness at the moment when the valve member 50 seals the inlet 20 is fast and negative pressure is generated therein, the inlet that collides with the valve member 50 and the valve member 50. In the contact portion T of 20, due to the quick opening and closing of the inlet opening 20 by the valve member 50, wear and damage of the contact portions T occur and friction noise (mechanical noise) at the contact portions. It is also a cushioning (60) to solve this, which will be described later.)

4 to 5, the cushioning ring 60 is formed on the inner periphery of the inlet 20, to reduce the flow path (R) of the oil flowing through the inlet 20 In this case, the cushioning ring 60 is formed by drilling a through hole 61 in the center, and forming a plurality of communication holes 62 along the circumferential surface to be formed on the inner circumference of the inlet 20, The oil flowing through the inlet 20 is allowed to flow only through the through hole 61 and the communication hole 62.

(In addition, at the moment when the valve member 50 comes into contact with one end of the inlet port 20 and closes the inlet port 20, the inner part 52 of the valve member 50 is loosely inserted into the through hole 61. .)

The cushioning ring 60 plays a role in the valve member 50 after the high pressure oil flows through the relief valve, rather than the moment when the high pressure oil flows into the relief valve. To be applied at the moment the inlet 20 is sealed by,

When the cushioning ring 60 is absent, the high pressure oil flowing in the width of the inlet 20 and discharged through the outlet 21 is released at the moment when the inlet 20 is closed by the valve member 50. Predetermined oils flowing in the valve are returned immediately through the inlet 20 due to the forward operation of the valve member 50. However, at this time, wear and noise occurs in the contact portion of the valve member 50 and the oil inlet 20,

When there is a cushioning ring 60, as shown in FIG. 5, the high pressure oil introduced by the width of the inlet 20 and discharged through the outlet 21 is inlet 20 by the valve member 50. Is closed, predetermined oils flowing in the relief valve are returned immediately through the inlet 20 due to the forward operation of the valve member 50, but the flow becomes smaller than the case without the cushioning 60 In other words, since only the through-hole 61 and the plurality of communication holes 62 have to be returned to the inlet 20 again, the amount of oil to be discharged through the through-holes 61 and the communication holes 62 is increased. The sealing speed of the valve member 50 is slowed down.

In other words, when the cushioning ring 60 does not exist, a problem occurs because the valve member 50 opens and closes the inlet 20 quickly. However, the cushioning ring 60 exists to reduce the flow path of oil. In this case, since the oil can flow only in the reduced portion, the oil returned back to the inlet 20 through the through hole 61 and the communication hole 62 is between the valve member 50 and the inlet 20. The gap is formed in the valve member 50 is quickly in contact with the contact portion (T) of the inlet 20 will not generate noise and wear.

(Of course, in the above description, the through-hole 61 and the communication hole 62 are used at the same time, but according to the embodiment of the user, only the through-hole 61 or only the plurality of the communication holes 62 are used to form perforations, respectively. Of course, the number of perforations of the communication hole 62 may also be adjustable by the user.

As mentioned above, although this invention was demonstrated by the limited embodiment and drawing, this invention is not limited by this, The person of ordinary skill in the art to which this invention belongs, Various modifications and changes may be made without departing from the scope of the appended claims.

1 is a schematic diagram of one embodiment showing a conventional hydrogen compressor drive mechanism when the piston is at its highest point.

Figure 2 is a schematic diagram of one embodiment showing a conventional hydrogen compressor drive mechanism when the piston is at its lowest point.

Figure 3 is a cross-sectional view of one embodiment showing a conventional relief valve.

Figure 4 is a cross-sectional view showing an embodiment of the inlet opening of the relief valve for hydrophobic compressor according to the present invention.

Figure 5 is a cross-sectional view showing an embodiment of the inlet closing time of the relief valve for hydrophobic compressor according to the present invention.

<Indication of symbols for main parts of drawing>

10: housing 11: mounting hole

20: inlet 21: outlet

30: elastic member adjusting screw portion 40: elastic member

50: valve member 51: base portion

52: internal part 53: opening and closing part

60: cushioning 61: through hole

62: communication hole

Claims (6)

In the hydrogen compressor that compresses the diaphragm by reciprocating the piston and converts the low pressure hydrogen gas into high pressure and discharges it, when the piston reaches the highest point, it is necessary to relieve the rising pressure of the oil in the hydrogen compressor. In the structure of the relief valve for the hydrogen compressor, An inlet and outlet 21 through which high pressure oil compressed between the diaphragm and the piston flows in and out; An elastic member adjusting screw part 30 coupled to one end of the housing 10 and having an elastic member 40 connected to the housing 10 at the other end thereof; One end is inserted into the elastic member 40, the other end is in contact with the inlet 20 and the valve member 50 for opening and closing the inlet 20; A cushioning ring (60) installed at an inner circumference of the inlet port (20) to reduce an oil flow path in the inlet port (20); Relief valve structure for a hydrogen compressor, characterized in that consisting of. The method of claim 1, The inlet 20 is Perforated in the housing 10 to form a right angle with the outlet 21, the opening and closing in accordance with the movement of the valve member 50 having the same center line as the inlet 20, and communicates with the outlet 21 and Relief valve structure for a hydrogen compressor, characterized in that the disconnection. The method of claim 1, The valve member 50 is A base portion 51 into which one end is fitted in the longitudinal direction to the elastic means; At the other end of the base portion 51, the diameter is formed to be relatively smaller than the base portion 51, corresponding to the through-hole 61 is formed in the center of the cushioning ring 60 and embedded in a predetermined length Section 52; An opening part 53 protruding from an outer circumference of the base part 51 to be in contact with or separated from one end of the inlet port 20 according to whether oil is introduced through the inlet port 20; Relief valve structure for a hydrogen compressor, characterized in that consisting of. The method of claim 3, The valve member 50 is If oil with increased pressure flows through the inlet, The valve member 50 is reversed to compress the elastic member 40 while the opening and closing portion 53 is spaced apart from the inlet 20, and the inlet 20 and the outlet 21 to discharge the high pressure oil. ), When the oil pressure is released The valve member 50 is reversed, while the elastic member 40 is returned to its original state, the opening and closing portion 53 is in contact with the inlet 20, hydrogen characterized in that the inlet 20 and outlet 21 are disconnected. Relief valve structure for compressor. The method of claim 1, The cushioning 60 is By forming a through hole 61 corresponding to the other end of the valve member 50 in the center, When the inlet 20 is closed by the valve member 50, the oil flowing into the outlet 21 is returned through the through hole 61 having a diameter smaller than that of the inlet 20. By lowering the closing speed of the inlet 20 of the valve member 50 by the amount of the feedback oil, it is characterized in that the noise and wear generated during contact between the end of the valve member 50 and the inlet 20 is reduced. Relief valve structure for hydrogen compressor. The method of claim 1, The cushioning 60 is The through hole 61 corresponding to the other end of the valve member 50 is formed in the center, and the plurality of communication holes 62 are formed along the circumferential surface. When the inlet 20 is closed by the valve member 50, the oil flowing into the outlet 21 is returned only through the through hole 61 and the communication hole 62 having a diameter smaller than that of the inlet 20. When the inlet port 20 of the valve member 50 is closed by the amount of oil fed back to the through hole 61 and the communication hole 62, the end of the contact between the valve member 50 and the inlet port 20 ends Relief valve structure for a hydrogen compressor, characterized in that to reduce the noise and wear generated.

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