KR20070063515A - Pressure control device - Google Patents

Abstract

A method for at least providing at least a first and a second assembly for manufacturing, respectively, a first reference pressure chamber (1A) which in use in a pressure control device encloses a gas such that the gas is held under a first reference pressure, and a second reference pressure chamber (1B) which in use in a pressure control device encloses a gas such that the gas is held under a second reference pressure, wherein the first reference pressure differs from the second reference pressure, and wherein the pressure control device is suitable for feeding through, on the basis of the reference pressure, a fluid from a first space (I) in which a relatively high pressure prevails to a second space (II) in which a relatively low pressure prevails, the method comprising providing the first and the second assembly such that each assembly for forming the respective reference pressure chamber comprises a casing (3A, 3B) and a plunger part (11A, 11B), while the casing is closed at a first end and the plunger part can at least partly connect with the casing in or adjacent a second end of the casing and is then movable relative to the casing.

Description

Manufacturing method of pressure control device {Pressure control device}

The present invention provides at least the first reference pressure chamber used in the pressure control apparatus surrounding the gas holding the first reference pressure and the second reference pressure chamber used in the pressure control apparatus surrounding the gas maintaining the second reference pressure, respectively. A method comprising a step of having a first assembly and a second assembly, wherein the first reference pressure is different from the second reference pressure, and the pressure control device to be used is based on the reference pressure. The fluid can be supplied from the one space portion to the second space portion in a relatively low pressure state.

Providing a first assembly and a second assembly, each assembly forming a respective reference pressure chamber consisting of a casing and a plunger portion, while the casing is sealed at the first end and the plunger portion is at or near the second end of the casing; It can be at least partially connected adjacently and then moved relative to the casing.

The above-mentioned first and second reference pressure chambers are provided in a pressure control device for controlling pressure to supply fluid from the first space portion in a relatively high pressure state to the second space portion in a relatively low pressure state based on the reference pressure. It is provided with the type of reference pressure chamber to be equipped. The first space portion may be, for example, a reservoir for the propellant or a space in which the product to be discharged by the spraying operation may be stored. In addition, the first space may be a pipe located upstream of the pressure control device. The second space may be, for example, a space in which the propellant is pressurized and the product is discharged out of the second space or the other space as the discharge of the propellant. The second space part may be, for example, the discharge channel of the aerosol can. The second space may be made of a pipe located downstream of the pressure control device.

In general, when the pressure of the second space portion in the pressure control device is lower than the reference pressure of the reference pressure chamber, the plunge portion is released from the first end of the casing, the passage between the first space portion and the second space portion is opened The liquid flows from the first space portion to the second space portion. When the pressure of the second space portion is higher than the reference pressure of the reference pressure chamber, the plunge portion is moved in the direction of the first end of the casing and the passage between the first space portion and the second space portion is closed.

The reference pressure to be provided to the reference pressure chamber is critical to the function of the pressure control device. The provision of a reference pressure in the reference pressure chamber may be accomplished by connecting the plunger to the casing, opening the sealable opening provided in the casing, and then adding gas through the opening until the desired reference pressure is reached in the reference pressure chamber. Can be formed. The disadvantage of this method is that when the sealable opening is closed, the gas still flows out of the reference pressure chamber, so that once the reference pressure chamber is closed through the closure of the sealable opening, the reference pressure is lower.

It is possible to assemble the reference pressure chamber and the pressure control device with a gas having the same ambient pressure as that made in the reference pressure chamber. This requires a labor intensive and costly method, which is more undesirable.

A method of providing an assembly for manufacturing a reference pressure chamber is described in WO 93/22222. In the above known method, the reference pressure chamber is formed of gas at atmospheric pressure, and the plunge portion and the casing are sized so that, when in use, the reference pressure of the preferred reference pressure chamber is formed when the plunge portion reaches the position with respect to the casing, When the plunger portion reaches a position relative to the casing, the passage between the high pressure space portion and the low pressure space portion is closed during use.

In WO 93/22222, the casing is sized so that the reference pressure is obtained in the reference pressure chamber during use when the plunge portion is positioned relative to the casing so that the passage is closed. The problem is that when the casing forms a size capable of realizing the desired reference pressure in the reference pressure chamber, the size of the reference pressure chamber depends on the desired reference pressure. Therefore, the size of the pressure control device is subordinated as it is dependent on the preferred reference pressure of the reference pressure chamber. Bonding the pressure control device to a device, such as a pipe or package that stores the product to be sprayed, requires that multiple devices be manually operated so that supplemental reference pressures are desirable because most of the components to be used need to be manufactured and used for each individual device. Make it. Indeed, expensive equipment is required for each device, which in turn includes manufacturing methods for a series of devices for different expensive reference pressures.

In order to operatively obtain the desired reference pressure in the reference chamber, the two parts need to be sized by mutual adjustment of the casing and the plunger. This results in a cost increase for the manufacture of the pressure control device.

It is an object of the present invention to include a method of coping with at least one of the above-mentioned problems. This object can be achieved by the method described in the preamble of the present invention, in addition to the present invention,

Providing the first and second assemblies with substantially the same first and second casings;

Comprising separate first and second plunge portions in the first and second assemblies, wherein during use the first plunge portion is formed in the first reference pressure chamber, and the first reference pressure is defined relative to the first casing. It is possible to reach the first position of the one plunge portion, the second plunge portion is formed in the second reference pressure chamber during use, the second reference pressure can reach the position of the second plunge portion with respect to the second casing, When forming the first reference pressure chamber, the first reference pressure chamber generates a gas having an ambient pressure equal to the ambient pressure of the gas generated in the second reference pressure chamber, while the first and second positions are respectively in a predetermined closed position. In accordance with this, the pressure control device uses a passage between the first space portion and the second space portion, characterized in that the passage is sealed by a separate plunge portion and opened by moving each plunge portion slightly away from the casing. .

According to the present invention, the first reference pressure obtained during use and the second reference pressure obtained during use differently from the first reference pressure may be dependent only on the plunge portion, if desired with any other part of the individual assembly. Any other part of the individual pressure control device remains the same.

This makes it possible to fabricate a reference pressure chamber that can make other reference pressures inexpensively in use. The reference pressure obtained in the reference pressure chamber may be coupled to one component of the reference pressure chamber, that is, the plunger portion. Moreover, all reference pressure chambers and all pressure control devices can be manufactured, contributing to the low cost manufacturing process for pressure control devices that control on the basis of other reference pressures at atmospheric pressure.

In one embodiment of the method according to the invention, the method comprises using the same mold to provide the first and second plunge portions. Independently of the reference pressure to be obtained in the reference pressure chamber formed in the plunger portion, the manufacture of the plunger portion is relatively inexpensive because such a plunger portion can be produced by, for example, injection molding. In this method, the price of the mold usually determines the price of the product formed by casting. When a significant plunge can be produced using a single mold, the price of the mold has an effect on reducing the price of the manufactured product.

In addition, the method according to the invention comprises the use of two plunge portions which are identical to each other at any time in the manufacturing process. Therefore, multiple identical plunge portions can be manufactured using a single mold. As will be explained later, optionally other reference pressures can be obtained to provide a difference between the plungers. For example, a plunge portion of another shape can be made by removing material.

A preferred embodiment of the method according to the invention comprises the step of seating at least one formation or one dimension in a mold. Therefore, for example, a series of first plungers are first manufactured using a single mold, and a series of second plungers are manufactured by having one forming portion or one dimension part in the mold using successive identical molds.

In one embodiment of the method according to the invention, the method further comprises providing the first and second plunger portions, wherein the first plunger portion and the second plunger portion have the same contour with at least one recess. Here, the size of the recess of the first plunge portion is different from the size of the recess of the second plunge portion, and the position of the recess of the first plunge portion is different from the position of the recess of the second plunge portion. Since the first and second plunge portions have the same outer shape, the two first and second plunge portions can be connected to the same casing and can optionally be connected to the same pressure control device. When at least one recess is located on the side of the plunge portion operatively adjacent to the first end of the casing, the recess size limits the volume of the reference pressure chamber when the plunge portion is taken to the closed position described above with respect to the casing. can do. This offers the possibility of assembling other pressure control devices, and the plunge portion has the same closed position with respect to the casing to hold each pressure control device. Except for the recess, the casing, the pressure control device and the plunger part are the same for each pressure control device. Only the size of the recess is determined as the reference pressure when the size of the reference pressure chamber and the reference pressure chamber are assembled at the same ambient pressure, respectively.

Further, since the recess can be located in the plunger, the recess can determine the position of the plunger with respect to the closed position and the casing so that the reference pressure can be obtained in the individual reference pressure chamber. In this closed position, the passage between the relatively high pressure first space and the relatively low pressure second space is sealed and in some embodiments is not obstructed so that no further movement of the plunger in the direction of the casing occurs. In this case, the at least one recess will be located on the side of the plunger portion which is operably separated from the casing. In this case the position and size of the recess is determined by the position of the plunger with respect to the casing which has reached the closed position. The position of the plunger portion relative to the casing is determined as the reference pressure when the volume of the reference pressure chamber and the reference pressure chamber are assembled at a lower ambient pressure than the desired reference pressure. In this case, except for the position and size of the recess, the casing, the pressure control device and the plunger portion can be manufactured in the same shape.

In an embodiment of the method according to the invention, at least one recess is located on the side of the plunger portion in operative contact with the first end of the casing. In this case, in order to achieve a plurality of pressure control devices having mutually different reference pressures in separate reference pressure chambers, initially, a plunger portion having the same shape as the same pressure control device having the same shape is used. In order to obtain a difference between the plunger portions and to obtain a different reference pressure in the reference pressure chamber, the recessed portion can be provided with a volume material. The plunge consists of at least two parts. The plunger portion also consists of at least three parts. The at least one portion then at least partially determines the size of the recess.

In an embodiment of the method according to the invention, the method comprises the steps of forming a first reference pressure in a gas having a first peripheral pressure and a second reference pressure in a gas having a second peripheral pressure. The ambient pressure and the second peripheral pressure are equal to each other. This makes it possible to simply assemble the reference pressure chambers each provided to be operable in gases having different reference pressures.

In an embodiment of the method according to the invention, the method comprises forming at least a first reference pressure chamber or a second reference pressure chamber under an ambient pressure equal to atmospheric pressure. This facilitates the method of forming at least the first reference pressure chamber or the second reference pressure chamber.

The invention will be explained in more detail with reference to the accompanying drawings.

Figure 1a schematically shows a first reference pressure chamber according to a first embodiment of the method according to the invention.

Figure 1b schematically shows a second reference pressure chamber according to a first embodiment of the method according to the invention.

FIG. 1C is a view schematically showing the external shape of the plunger portion shown in FIGS. 1A and 1B.

Figure 2a schematically shows a first reference pressure chamber according to a second embodiment of the method according to the invention.

Figure 2b schematically shows a second reference pressure chamber according to a second embodiment of the method according to the invention.

Figure 3a schematically shows a first reference pressure chamber according to a third embodiment of the method according to the invention.

Figure 3b schematically shows a second reference pressure chamber according to a third embodiment of the method according to the invention.

Figure 4a schematically shows a first reference pressure chamber according to a fourth embodiment of the method according to the invention.

Figure 4b schematically shows a second reference pressure chamber according to a fourth embodiment of the method according to the invention.

5 schematically illustrates an example of a plunger portion according to a fifth embodiment of the method according to the invention.

6 schematically shows an example of the plunger portion according to the sixth embodiment of the method according to the invention.

Figure 7a schematically shows a first pressure control device according to a fifth embodiment of the method according to the invention.

Fig. 7b schematically shows a second pressure control device according to the fifth embodiment of the method according to the invention.

In the accompanying drawings, like elements bear like reference numerals.

1A shows a product of a method for providing a first assembly A for fabricating a first reference pressure chamber 1A that is used in a pressure control device 2A and surrounds a gas maintained at a first reference pressure P1. do. FIG. 1B shows a product of a method of providing a second assembly B for producing a second reference pressure chamber 2B used in the pressure control device 2B to enclose a gas maintained at a second reference pressure P. FIG. do. The first reference pressure P1 is different from the second reference pressure P2. The illustrated pressure control device is suitable for penetrating and supplying the fluid from the relatively high pressure first space I to the relatively low pressure second space II based on the individual reference pressure in the reference pressure chamber. The method of making the assemblies A and B shown in FIGS. 1A and 1B comprises providing the first and second assemblies A and B, each forming a separate reference pressure chamber 1A and 1B. The assemblies A and B consist of casings 3A and 3B and plunger portions 4A and 4B. Each casing 3A, 3B is sealed with first ends 5A, 5B. As shown, the plunger portion may be at least partially connected adjacent to the casings 3A, 3B or the second ends 6A, 6B of the respective casings 3A, 3B and then movable relative to the casing. . For each assembly (A, B), when the position of the individual plunger portions (4A, 4B) with respect to the individual casings (3A, 3B) reaches the individual pressure control devices (2A, 2B) in use, the first and the first The passages 7A and 7B are sealed between the two space parts I and II. Since the plunger portions 4A and 4B move slightly in the direction away from the casings 3A and 3B, the passages 7A and 7B are opened. As is apparent in the state shown in Figs. 1A and 1B, the passages 7A and 7B between the first and second space portions I and II are sealed. In other words, in the assemblies A and B shown in Figs. 1A and 1B, the plunger portions 4A and 4B are respectively positioned in the closed position. The method of providing the assemblies A and B shown in FIGS. 1A and 1B comprises providing separate first and second casings 3A and 3B to the first and second assemblies A and B. FIGS. As shown schematically, the first and second casings 3A, 3B are actually identical to each other. In addition, the method includes providing separate first and second plunger portions 4A, 4B to the first and second assemblies A, B, the first reference pressure chamber forming a first reference pressure. The first plunge portion used in 1A can reach the first position of the first plunge portion predetermined with respect to the first casing, and is used in the second reference pressure chamber 2A for forming a second reference pressure. The second plunger portion 4B may reach a predetermined second position when the first reference pressure chamber 1A generates a gas having an ambient pressure equal to the ambient pressure of the gas generated in the second reference pressure chamber 2A. . The first and second positions correspond to the closed position.

As described above, the method includes providing separate first and second casings 3A, 3B which are actually identical to each other. The casings 3A, 3B must be identical to each other, and the same plunger portion forms the reference pressure chambers 1A, 1B with the aid of the casings 3A, 3B, and when the use of these assemblies occurs in the same pressure controller, the reference pressure chamber The reference pressures reached are equal to each other when the first reference pressure chamber generates a gas having an ambient pressure equal to the ambient pressure of the gas generated in the second reference pressure chamber. In practice, the casings 3A and 3B are made as identical and cup-shaped as possible. The manufacturing material of the casing should be very thin in order to maintain the airtightness and to secure the compactness of the formed pressure control device. As far as possible the casing is formed from aluminum.

1A and 1B, the method by which such an assembly is to be obtained includes providing first and second plunger portions 4A, 4B, the first plunger portion 4A and the second plunger portion ( 4B has the same contour with at least one recess 8A, 8B. In the plunger portions 4A, 4B shown in Figs. 1A and 1B, the recesses are located on the sides of the plunger portions 4A, 4B which abut the first ends 5A, 5B of the casings 3A, 3B. The size of the recess 8A of the first plunger portion 4A is different from the size of the recess 8B of the second plunger portion 4B. For clarity, FIG. 1C shows the outline BC of the plunger portions 4A, 4B. The recess U is indicated by a dotted line.

The method of making such an assembly includes using two plungers that are identical to each other at any time in a manufacturing process. Therefore, the recess 8B has the same size as the recess 8A. In this case, the plunger portions 4A and 4B are identical to each other. Before, during or after the formation of the reference pressure chamber 1B, one or more parts 9B and 10B are provided in the recess 8B so that the size of the recess 8B is different from the size of the recess 8A. .

The plunger portions 4A and 4B may be made of plastic. The same mold can be used to produce the plunger portions 4A and 4B. This provides a significant advantage for producing reference chambers that lead to other reference pressures, which are made as cheaply as possible. In practice, all parts require fabrication, and the first reference pressure chamber 1A can be used for the second reference pressure chamber 1B. For example, the inexpensive and simple components 9B and 10B may use other reference pressures superior in the reference pressure chamber 1B than the reference pressure chamber 1A when the two reference pressure chambers form a gas having the same ambient pressure.

In addition, the two plunger portions are made of the same mold, but, for example, the forming portion and the dimension portion are used in the formation of the first plunger portion 4A, whereas the forming portion and the dimension portion are used for the formation of the plunger portion 4B in the same mold. Not used. In essence, in the formation of the two plunger portions 4A and 4B, the forming portion and the dimension portion can be used, while the forming portion and the dimension portion forming the first plunger portion are different from the dimension portion and the forming portion of the second plunger portion. The use of formations and dimensions in casting can be optimized with the calculations and experience of those skilled in the art.

At least one of the two plunge portions 4A, 4B consists of at least two components. Therefore, the first part has piston parts 11A and 11B, which have stems 12A and 12B attached thereto. In the second part, a part of the plunger portions 4A and 4B is formed of O-shaped rubber rings 13A and 13B, while in use, the O-shaped rings 13A and 13B are partially formed by the plunger portions 4A and 4B. Since it slides with movement, it maintains the seal | sticker between plunger part 4A, 4B and casing 3A, 3B, and gas does not leak from reference pressure chamber 1A, 1B. On the other hand, the plunge portions 4A and 4B are made of one component structure and are formed by two component injection molding processes. Since the core portion is made of a relatively hard plastic material and the outer side is made of rubber, an O shape The ring is no longer needed.

The plunger portions 4A and 4B may also be composed of two parts when the facility for operatively restricting the closed position is not arranged until after the reference pressure chamber has been formed and is not provided in the pressure control device. Therefore, the blocking portions 14A and 14B can be mounted to the stems 12A and 12B which are part of the plunger portions 4A and 4B, for example, using a fastening machine such as a threading machine.

As shown in Fig. 1A, the plunger portion 4A is formed of one component, so that the plunger portion 4A has the same component 9B as two component shapes, and in this case, the plunger portion having three components ( 4B has components 9B and 10B. The parts 9B and 10B are determined by the size of the recess 8B.

1A to 4B, reference pressure chambers 1A and 1B formed with the help of plunger portions 4A and 4B and casings 3A and 3B are schematically located in pressure control devices 2A and 2B. In this schematic drawing, the first space portion I in which the fluid is held under relatively high pressure is the wall W provided in the passages 7A and 7B and the second space portion II in which the fluid is held under relatively low pressure. ). The first space part I comprises, for example, a storage space for the product to be injected and a storage space for the propellant. In addition, the first space I includes a pipe located upstream of the pressure control device. The second space part (II) is generally in communication with the pressure control device in an open state with the downstream part of the pipe to which gas is to be transported so that it can be the discharge channel of the aerosol can. The dashed lines shown in FIGS. 1A and 1B show that gas, in some cases liquid, flows from the first space portion I to the second space portion II. In addition, this is only schematically shown as an example. Many variations are possible. 1A-4B, the plunger portion is in the closed position. The dashed lines shown in FIGS. 1A and 1B show passages of fluid supplied through the pressure control device as the individual plungers move slightly away from the individual casings in the closed position.

The pressure control device shown in FIGS. 1A-4B is briefly formulated as follows. When the pressure in the individual reference pressure chambers 1A, 1B is higher than the pressure in the individual second space part II, the individual plungers 4A, 4B move slightly apart from the individual casings 3A, 3B, ie the individual casings. Will move slightly apart from the respective first ends 5A, 5B of 3A, 3B. As a result, the individual passages 7A and 7B will open as passages of the fluid from the respective first space portion I to the respective second space portion II. When the pressure in the individual second space portion II is higher than the reference pressure in the reference pressure chambers 1A and 1B, the individual plunger portions 4A and 4B are the individual first ends 5A and 5B of the individual casings 3A and 3B. Will move in the direction of). As a result, the individual passages 7A and 7B will be closed again, thus not allowing passage of fluid from the first space portion I to the second space portion II.

The reference pressures in the individual reference pressure chambers 1A and 1B are obtained as follows. When an ambient pressure below the desired reference pressure is obtained, the individual plunger portions are "connected" to the individual casings. In the illustrated embodiment, the "connecting" inserts an individual plunger portion into an individual casing, where the individual plunger portion and the individual casing enclose a gas having an ambient pressure, and the individual plunger portion without the gas which can be released from the reference pressure chamber obtained. The casing can be moved. In other embodiments, other connections of individual plungers and individual casings may be possible. When the obtained reference pressure chamber is inserted into the individual pressure control device or the individual pressure control device is arranged around the obtained reference pressure chamber, the individual stems 12A, 12B pass through the passages 7A, 7B and the respective first space parts I. ), Then the individual blocking portions 14A, 14B are arranged in the fluid having high pressure in the respective first space I, the individual plunge portions of the first end of the individual casing until the closed position is reached. Will be moved at high pressure in the direction. In the closed position, the passage from the first space portion (I) to the second space portion (II) is closed. When the plunger portion reaches the position with respect to the casing and the closed position reaches, the reference pressure spreads in the reference pressure chamber. Then, when the pressure in the second space portion II is lower than the reference pressure in response to the individual plunger portion, the passage will be opened again. Therefore, the reference pressure reaches the reference pressure chamber when the high pressure fluid appears in the pressure control device during the first time. Since the reference pressure chamber does not need to be filled with relatively high pressure gas at the time of forming the reference pressure chamber, the gas leakage in the reference pressure chamber is reduced during the period compared with the period when the reference pressure spreads in the reference pressure chamber. In the following, it will be described in more detail that a particular embodiment of the method according to the invention can be made with this phenomenon.

Figures 2a and 2b show a product of an embodiment of the method according to the invention, provided in a plant in which the first and second plungers 3A, 3B determine the closed position during use, while the size of the plant And the position is different between the first plunge portion 4A and the second plunge portion 4B. In this case, the installation consists of recesses 15A and 15B.

An embodiment of the method according to the invention, in which the plunge portion 4A, 4B shown in FIGS. 3A and 3B is provided, comprises the steps of providing the plunge portion 4A, 4B. 4B has the same contour with at least one recess 15A, 15B. The position where the recessed portion 15A of the plunger portion 4A shown in FIG. 2A is located is different from the position where the recessed portion 15B of the plunger portion 4B shown in FIG. 2B is located.

A product of another embodiment of the method according to the invention is shown in FIGS. 3A and 3B. The method of producing such a product includes providing plungers 4A, 4B, which have the same contour with at least one recess 16A, 16B. The size of the recessed portion 16A of the plunge portion 4A is different from the size of the recessed portion 16B of the plunge portion 4B.

2A-3B, the recess is located on the side of the plunger which is away from the casing during use.

2A and 2B, the first plunge portion 4A and the second plunge portion 4B are identical except for the position of the facility, in this case the recesses 15A, 15B.

In the product of the method according to the invention as shown in Figs. 3a and 3b, the first and second plunge portions 4A and 4B are the size of the installation, in this case the recesses 16A and 16B. Same as).

In addition, the plunge portions shown in FIGS. 2A to 3B are retained, with each plunge portion having stems 2A and 2B in which the facility is located. Alternatively or additionally, the described apparatus has recesses and the apparatus for operatively determining the closed position has a sealing surface. 4A and 4B, the sealing surface is formed of an O-shaped rubber ring, while in FIG. 4A it is disposed at the position of the plunge portion 4A to seal against the inner wall or wall of the passage 7A to seal the passage. In Fig. 4B, an O-shaped ring is arranged at the inner wall or the edge portion of the passage 7B. Therefore, the sealing surface is formed of the component 17 of the plunging portion 4B.

In essence a combination of the above-described embodiments of the method according to the invention is possible, wherein the plunge portion differs from the side of the plunge portion operably away from the casing and the side of the plunge portion operably apart from the first end of the casing. Therefore, parts 9B and 10B may be used as shown in FIG. 1B, while recesses 15A and 15B or recesses 16A and 16B may be used as shown in FIGS. 2A to 3B. .

5 shows a plunge portion P which can be used in an embodiment of the method according to the invention. At position 20, an O-shaped ring is arranged around the vertical wall 21. In addition, the O-shaped ring need not be enclosed in a ring shape. The slot 23 provided in the stem 22 extends in the axial direction of the stem 22. In this slot 23, optionally fastenings (not shown) can be fastened to form recesses based on the part of the slot that is not filled in the fastening. The position of the recess can be defined through the position of the fastening portion. The size of the recess can be defined through the size of the fastening.

6 shows a part of a plunge portion which can be used in an embodiment of the method according to the invention. In this case, the O-shaped ring 24 is further formed of the collar 25 of the plunging portion P, the vertical edge portion 21 of the plunging portion P, and the L-shaped ring 26. , L-shaped ring that can be fastened in the vertical edge portion 20 is closed by itself. The part 26 is connected to the plunger P by a weld joint or a glue joint. The size of the recess U can be defined using one or more inserts ID. 6 does not separately show a part of the stem operably separated from the casing.

The reference pressure chambers shown in FIGS. 1A-4A are each provided with the same type of pressure control device. The casings are identical to each other and the plunger portions are different.

Another product of an embodiment of the method according to the invention is shown in FIGS. 7A and 7B. The casings 3A and 3B are fixed and the plunger portions 4A and 4B are identical to each other. Other reference pressures can be achieved in this example, the method comprising the step of seating the first assembly A in the first pressure control device 1A and the second assembly b in the second pressure control device 1B. And a step of seating, while the passage and the position with respect to the casing of the first pressure control device are formed differently with respect to the passage in the second pressure control device, such that It is based on the gas it has, two identical plungers, and two identical casings, and during use, the reference pressure in the first chamber is different from the reference pressure in the second chamber.

Preferably, an embodiment of the method according to the invention comprises the step of manufacturing a plurality of reference pressure chambers filled with gas, which reference chambers can be used as part of the pressure control device. For each reference pressure in multiple reference pressure chambers, the reference pressure obtained is different from the reference pressures obtained in other reference pressure chambers. In other words, the present invention is not limited to the way in which the two pressure control devices are formed, and can vary only with the reference pressure. The multiple pressure control devices are identical except for the reference pressure which will be caused by individual plungers which are slightly different from each other. One embodiment of the method according to the invention comprises the steps of forming a gas having a first peripheral pressure in a first reference pressure chamber and forming a second peripheral pressure in a second reference pressure chamber, wherein The two circumferential pressures are the same. In this case, the mutual difference at the reference pressure is accurately determined in advance based on the difference in the individual plunge portions.

An embodiment of the method according to the invention comprises the step of forming at least a first reference pressure chamber or a second reference pressure chamber under an ambient pressure equal to atmospheric pressure. In this case, there is no further need for the use of a mechanism for regulating pressure while the method is being executed.

As already described above, the method may comprise forming a first and a second pressure control device, wherein the first reference pressure is spread in the first reference pressure chamber and the second reference pressure is spread in the second reference pressure chamber. The first and second pressure control devices can be provided with a compression package, respectively, it is possible to discharge the fluid stored under a relatively high pressure using a pressure control device to a relatively low pressure.

On the other hand, at least one of the first and second pressure control devices has a pipe, which is located downstream of the pressure control device from a position where the fluid is located upstream to the pressure control device under relatively high pressure for the pressure control device. Can be supplied through a relatively low pressure.

The method is not limited to the embodiment described above.

Therefore, instead of using a recess on the side of the plunge portion which is operatively in contact with the first end of the casing, in order to define the volume, the reference pressure chamber is defined using a filling part operatively mounted to the volume in the reference pressure chamber. Limit the pressure. The closed position defines the position of the plunger portion with respect to the casing and the size of the reference pressure chamber achieved at the position defines the reference pressure. The charging unit may optionally be provided in the reference pressure chamber without being connected to the plunger portion. However, this situation is considered to be the product of an embodiment of the method according to the invention because the filling part is incorporated into the plunger part, such as the plunger part which is movable relative to the casing. In other words, the live part consists of a part of the plunger part.

In addition, the method according to the invention comprises the step of mounting an openable shutoff, wherein the high pressure fluid stored in the first space appears in the pressure controller when the openable shutoff is located in the "high pressure fluid discharge" position. . Here, it is possible to reduce the leakage of gas in the reference pressure chamber before the reference pressure is provided. This has the advantage of the so-called life of the reference pressure chamber. Examples of such openable closures are described in Dutch Patent No. 1022455.

In addition, a closed machine in which the passage is closed may have a shape different from that shown. For example, instead of the wall portion of the wall W away from the casing, the wall portion of the wall W adjacent to the casing can be used for sealing, for example covered with a plate. In this case, an inversion mechanism can be applied, where the direction of movement of the cover plate and the direction of the piston can be reversed. In certain cases, a cover membrane may be used in place of the stem.

It is noted that such modifications are within the basic structure of the present invention.

Claims (23)

At least the first and the first to produce a first reference pressure chamber used in the pressure control apparatus surrounding the gas holding the first reference pressure and a second reference pressure chamber used in the pressure control apparatus surrounding the gas maintaining the second reference pressure. And a second assembly, wherein the first reference pressure is different from the second reference pressure, and the pressure control device used is a relatively low pressure in a relatively high pressure first space based on the reference pressure. To supply fluid to the second space portion, To form a separate reference pressure chamber having a casing and a plunger portion, the casing is hermetically sealed to a first end, the plunger portion being at least partially connected to or near the second end of the casing, being movable relative to the casing. In a method comprising the steps of: providing a first and a second assembly, Providing the first and second casings with substantially the same first and second casings; And providing the first and second plungers to the first and second assemblies, wherein the first reference pressure chamber generates a gas having an ambient pressure equal to the ambient pressure of the gas formed in the second reference pressure chamber. At this time, the first plunger portion being used in the first reference pressure chamber for forming the first reference pressure can be obtained at a first position of the first plunger portion with respect to the first casing, and forms the second reference pressure. The second plunger portion being used in the second reference pressure chamber may be obtained at a second position of the second plunger portion with respect to the second casing, while the first and second positions are separately provided to the pressure control device. Corresponding to each other in a predetermined closed position in use, the passage between the first space portion and the second space portion is sealed with a separate plunger portion and the individual plungers in a direction away from the casing. A manufacturing method of a pressure control device characterized in that to move slightly. The method of claim 1, wherein the method comprises providing the first and second plunger portions, wherein the first and second plunger portions are identical to each other. The method of claim 1, wherein the method comprises providing the first and second plunger portions, wherein the first plunger portion is different from the second plunger portion. 4. The method of claim 3 including providing the first and second plunger portions using the same mold. 5. A method according to claim 3 or 4, comprising placing at least one formation and dimension in the mold. A method according to any one of claims 3 to 5, comprising using two identical plungers at any time during the fabrication process. The method of any one of claims 3 to 6, wherein the method further comprises providing the first and second plunger portions, wherein the first plunger portion and the second plunger portion have at least one recess. It has the same outer shape, the size of the recess of the first plunger portion is different from the size of the recess of the second plunger portion, wherein the recess of the first plunger portion is positioned differently from the position where the recess of the second plunger portion is located. How to. 8. The method of claim 7, wherein the at least one recess is located on the side of the plunger portion used adjacent to the first end of the casing. The method of claim 8, wherein the plunger portion is comprised of at least two parts. 10. The method of claim 9, wherein the plunger portion is comprised of at least three parts. The method of claim 9 or 10, wherein at least one of the components determines at least partially the size of the recess. 8. The method of claim 7, wherein the at least one recess is located on the side of the plunger portion used away from the casing. 13. The apparatus of any one of claims 3 to 12, wherein the first and second plunger portions each have a facility for determining a closed position during use, wherein the size and location of the facility are determined by the second plunger portion and the first. The plunger portion being different. The method of claim 13, wherein the first plunger portion and the second plunger portion are identical except for the location and size of the facility. 15. The method of claim 13 or 14, wherein the first plunger portion and the second plunger portion each have a stem on which the facility is to be located. The method according to any one of claims 13 to 15, wherein the facility has a sealing surface. 17. The method according to any one of claims 1 to 16, wherein the method further comprises fabricating a plurality of reference pressure chambers filled with gas, the plurality of reference pressure chambers being pressure controlled as described in claim 1. Is a part of an apparatus and is retained in each reference chamber of a plurality of reference pressure chambers, wherein the reference pressure obtained is different from the reference pressure obtained in any other reference pressure chamber. 18. The method of any one of claims 1 to 17, wherein the method comprises the steps of forming a gas having a first peripheral pressure in the first reference pressure chamber and forming a gas having a second peripheral pressure in the second reference pressure chamber. Including, wherein the first peripheral pressure and the second peripheral pressure are the same. 19. The method of any one of claims 1 to 18, wherein the method comprises forming at least a first reference chamber or a second reference chamber under ambient pressure equal to atmospheric pressure. 20. The method according to any one of the preceding claims, wherein the method comprises the steps of forming a first pressure control device with a first reference pressure chamber and forming a second pressure control device with a second reference pressure chamber. Method comprising a. 21. The method of claim 20, wherein the method includes forming the first and second pressure control devices, wherein the first reference pressure is spread in a first reference pressure chamber and the second reference pressure is spread in a second reference pressure chamber. How to characterized. 22. The method of claim 20 or 21, wherein the at least one first and second pressure control device is provided with a pressure package capable of discharging relatively high pressure fluid at a relatively low pressure using the pressure control device. How to. 23. The method of any of claims 20 to 22, wherein the at least one first and second pressure control device uses a pressure control device to control the pressure at a position upstream to the pressure control device using a pressure control device. And a pipe capable of supplying at a relatively low pressure to a downstream position relative to the device.

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