JP2016079999A - Exhaust gas recovery type pressure gas supply auxiliary device and pressure gas supply system using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure gas supply auxiliary device capable of re-utilizing all the gas energy discharged by a pressure increasing valve while using this pressure increasing valve helpful for energy saving, improving durability of a compressor and attaining energy-saving at the pressure gas supply source.SOLUTION: This invention comprises a pressure increasing valve 10 for pressurizing pressure gas got from a pressure gas supply source 200 by discharging gas from an exhaust port 12 when pressure gas from the pressure gas supply source 200 is received through a suction port 11 to cause a piston to reciprocate in the cylinder; a compressor 20 for sucking all discharged gas from the exhaust port 12 of the pressure increasing valve 10, pressurizing the sucked exhaust gas to a pressure supplied to the suction port 11 of the pressure increasing valve 10, then supplying it to the suction port 11; and a tank device once storing the pressurized gas pressurized by the pressure increasing valve 10 and capable of supplying it toward a pressure gas device 300.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a pressure gas supply auxiliary device of a type that completely recovers exhaust gas from a pressure increasing valve, and a pressure gas supply system using the same.

  For example, when manufacturing a printed wiring board, various devices using compressed air are used in each process such as processing, transport, and cleaning, and compressed air, that is, compressed air or pressurized gas is used for each device. Have been supplied. Moreover, in the packaging processing apparatus, whether it is a line type or a rotary type, pressurized gas is used and supplied for each processing step.

  In the above representative apparatus, in any case, the pressure of the pressure gas sent from the air source of the gas supply device always has a "decompression loss" due to passage through the pipe, and remains removed from the pipe. In many cases, the pressure gas does not function. For this reason, the pressure gas sent into each device is “increased” or “increased” by an “intensification valve” as proposed in, for example, Patent Document 1 or Patent Document 2 disposed in front of each device. In general, it is generally supplied to the equipment side.

  In addition, if gas is supplied to a plurality of gas appliances that use compressed or pressurized gas by a long pipe from a single main supply device, the above-mentioned "pipe decompression loss" naturally increases, so the gas pressure Must be “pressure-increasing” or “pressure-increasing” by “pressure-increasing valve” and then sent to each device.

  The “pressure increasing valve” for increasing or increasing the pressure gas as described above is, for example, a residual gas that has been sent from an air source through a pipe through a pipe and has lost pressure reduction as described in Patent Document 1 and the like. Since it operates using the pressure difference between pressure and atmospheric pressure and does not require a special power source, it is excellent as an energy-saving device.

  By the way, in the general pressure gas apparatus (for example, industrial robot) which operates using pressure gas as a power source, the pressure of the pressure gas required for the operation is 0.7 to 0.9 MPa (hereinafter the same). Therefore, if this pressure unit is simply described as M), the pressure of the pressure gas to be created by the original pressure gas supply device (main compressor) is also set to the same level of 0.7 to 0.9M. There is a need. Even if it is made larger than this, not only is it necessary to apply extra energy in the main compressor, it is not only useless, but also the pressure gas equipment may be damaged.

  On the other hand, when the pressure gas is sent from the pressure gas supply device to the target device, the "pipe" must be used. However, in this pipe, the above-mentioned "pipe decompression loss" occurs, and the specific numerical value is as follows. Although it depends on the length, in this example, it is about 0.3 to 0.5M. Therefore, in order to eliminate this “pipe decompression loss” and increase the pressure without applying energy to the 0.7 to 0.9M required for pressure gas equipment, an “energy booster valve” with excellent energy saving is used. -ing

Japanese Patent Laid-Open No. 2002-39105, abstract, representative figure, 0007 Japanese Patent No. 3705730 Patent No. 5453136

  As shown in FIG. 7, the “pressure booster” proposed in Patent Document 1 is “having a first pressure booster valve 10 and a second pressure booster valve 20, and the first pressure booster valve 10 includes an air source P. And the first booster valve 10 and the second booster valve 20 are connected in series. The final exhaust air from the second booster valve 20 passes through the exhaust port 1d into the atmosphere. Are discharged.

  In addition, the “pneumatic cylinder exhaust recovery device” proposed in Patent Document 2 is, as described in the claims and the like, “of the exhaust air discharged from the pneumatic cylinder, the pressure is lower than a predetermined pressure. Is provided with a three-port valve that discharges the exhaust air into the atmosphere and outputs exhaust air having a pressure higher than a predetermined pressure.

  In short, both the “pressure booster” in Patent Document 1 and the “pneumatic cylinder exhaust recovery device” in Patent Document 2 operate using the pressure difference between the residual pressure of the gas that has been decompressed and the atmospheric pressure. Because it does not require a special power source, it is excellent as an energy-saving device. However, in order to perform the function as a “pressure increasing valve”, “the final exhaust air is discharged from the exhaust port 1d into the atmosphere. Or “exhaust air having a pressure lower than a predetermined pressure out of exhaust air discharged from the pneumatic cylinder” must be discharged into the atmosphere.

  However, even in the exhaust gas discharged into the atmosphere in these Patent Documents 1 and 2, pressure that can be discharged into the atmosphere, that is, energy remains, and this residual pressure or energy is the air supply source. Therefore, “final exhaust air is discharged into the atmosphere from the exhaust port 1d” or “exhaust air that is lower than a predetermined pressure out of the exhaust air discharged from the pneumatic cylinder is discharged into the atmosphere. “Removing into” is like throwing away the energy added by the air supply.

  Therefore, the present inventor has stated that “the final exhaust air is discharged into the atmosphere from the exhaust port 1d” or “of the exhaust air discharged from the pneumatic cylinder, the exhaust air having a pressure lower than a predetermined pressure is discharged into the atmosphere. As a result of various studies on how to effectively use the energy remaining in the exhausted gas, the compressor technology such as Patent Document 3 already proposed by the present applicant is used. The present invention has been completed by newly finding that a good result can be obtained by combining them.

  That is, the first object of the present invention is to use a pressure increasing valve useful for energy saving, while being able to reuse all of the gas energy discharged by this pressure increasing valve, to improve the durability of the compressor, An object of the present invention is to provide a pressure gas supply auxiliary device that can achieve energy saving in a gas supply source.

  In addition, the second object of the present invention is that while using a booster valve useful for energy saving, all of the gas energy discharged by this booster valve can be reused, improving the durability of the compressor, An object of the present invention is to provide a pressure gas supply system using a pressure gas supply auxiliary device capable of achieving energy saving in a gas supply source.

In order to solve the above problems, first, the means taken by the invention according to claim 1 will be described with reference numerals used in the description of the best mode described below.
“A pressure gas auxiliary supply device 100 connected via a pipe 210 between a pressure gas supply source 200 and a pressure gas device 300 operated by the pressure gas from the pressure gas supply source 200,
When the pressure gas from the pressure gas supply source 200 is received from the intake port 11 and the piston in the cylinder is reciprocated, the pressure gas from the pressure gas supply source 200 is pressurized by exhausting from the exhaust port 12. A pressure valve 10;
The compressor 20 supplies all the exhaust from the exhaust port 12 of the pressure increasing valve 10 to the pressure supplied to the intake port 11 of the pressure increasing valve 10 and then supplies the exhaust to the intake port 11 side. When,
The pressure gas auxiliary supply device 100 includes a tank device 30 that can temporarily store the pressurized gas pressurized by the pressure increasing valve 10 and then supply the pressurized gas to the pressure gas device 300.
It is.

  The pressure gas auxiliary supply device 100 according to the first aspect has a configuration as shown in FIGS. 1 and 2, and the basic configuration is as follows. A pressure-increasing valve 10 that pressurizes the pressure gas in which a pressure loss has occurred, a compressor 20 that takes in and presses up all of the exhaust discharged when the pressure-increasing valve 10 pressurizes, and then sends the exhaust gas to the pressure-increasing valve 10 again. The pressure gas pressurized in step 1 is temporarily stored, and the pressure gas device 300 includes the tank device 30 that supplies the pressure gas when necessary.

  The pressure gas supply source 200 may be any gas that is used in the pressure gas device 300, for example, air, nitrogen gas, or hydrogen gas or helium gas necessary for “leak inspection”. However, in the embodiment to be described later, a pressure gas of 0.8 M to 0.9 M required by the pressure gas device 300 can be supplied. The pressure gas supplied from the pressure gas supply source 200 is described above with respect to the pipe 210 although it depends on the size of the pressure gas supply source 200, the pressure gas equipment 300, and the like and the length of the pipe 210. Although decompression loss occurs, in the embodiment described later, it is assumed that the pressure of the pressure gas after decompression is 0.4M to 0.6M.

  The pressure increasing valve 10 takes in the pressure gas from the pressure gas supply source 200 from the intake port 11, and uses only the pressure energy of 0.4M to 0.6M that the pressure gas itself has, and the pressure gas pressure 0.4M. -0.6M is increased to 0.8M-0.9M which the pressure gas apparatus 300 requires, and it discharges from the discharge port 13 to the tank apparatus 30 mentioned later. The pressure increasing valve 10 may be any type as long as such pressure increase can be performed. For example, the pressure increasing valve 10 may be one proposed in Patent Documents 1 and 2. However, in order to ensure that the entire amount of exhaust discharged from the exhaust port 12 by the pressure increasing valve 10 can be reliably sent to the compressor 20 described later, the exhaust port 12 of the pressure increasing valve 10 has a pipe 64 shown in FIGS. It is necessary to be able to discharge in a single pipe.

  In the case of the above example, the pressure of the exhaust gas discharged from the exhaust port 12 of the pressure increasing valve 10 is as follows as a result of increasing the pressure gas from 0.8 M to 0.9 M required by the pressure gas device 300. The pressure is reduced from 2M to 0.4M.

  All the exhaust from the exhaust port 12 of the pressure increasing valve 10 as described above is taken in, and the exhausted air is pressurized to the pressure supplied to the intake port 11 of the pressure increasing valve 10 and then supplied to the intake port 11 side. The compressor 20 may be of the type proposed by the applicant in Patent Document 3, but any compressor 20 that satisfies the condition of intake of all exhaust from the exhaust port 12 of the pressure increasing valve 10 can be used. Such a type may be used.

  The compressor 20 sucks all the exhaust from the exhaust port 12 whose pressure has been reduced to 0.2 M to 0.4 M by the pressure increasing valve 10, and the exhaust of the pressure increasing valve 10 is operated by the operation of the motor 21. After the pressure supplied to the intake port 11 is increased, the pressure is supplied to the intake port 11 side of the pressure increasing valve 10 via, for example, a pipe 65.

  What is important in the compressor 20 constituting the pressure gas auxiliary supply device 100 is to suck all the exhaust from the exhaust port 12. Exhaust from the exhaust port 12 of the pressure increasing valve 10 has a pressure drop of 0.2M to 0.4M when viewed from the first pressurized gas supply source 200, for example, atmospheric pressure (0.0 Pa). ) Still contains sufficient pressure energy. In the case of this pressure gas auxiliary supply device 100, 0.2 M to 0.4 M exhaust gas supplied to the compressor 20 is added to about 0.4 M to 0.6 M supplied to the intake port 11 of the pressure increasing valve 10. Since it is the work of the compressor 20 to press, the compressor 20 is hardly subjected to an extreme load.

  The fact that an extreme load due to the pressure gas is not applied to the compressor 20 means that almost no load is applied to each member of the compressor 20, so that the compressor 20 has little failure and maintenance. It will be less. As a result, the compressor 20 has improved durability.

  Now, the pressure gas boosted by the compressor 20 is supplied again to the intake port 11 side of the pressure increasing valve 10 through the pipe 65, as shown in FIG. As described above, the pressure gas from the pressure gas supply source 200 is sent to the intake port 11 of the pressure increasing valve 10 through the pipe 210 in a state where a pressure loss of about 0.4 M to 0.6 M is lost. Since the pressure gas is fed from the compressor 20 in addition to this, the supply amount of the pressure gas required by the pressure gas supply source 200 is reduced. That is, energy saving on the pressure gas supply source 200 side is achieved.

  On the other hand, as described above, the pressure gas produced by the pressure increasing valve 10 is pressurized to 0.8 M to 0.9 M required by the pressure gas device 300, and the pipe 62 in FIG. The valve 31 is interposed between the tank device 30 and the pressure gas device 300, and the pressure gas to the pressure gas device 300 is opened and closed by opening and closing the valve 31. Is controlled. In addition, since the pressure gas is stored in the tank device 30 until the pressure gas is supplied to the pressure gas device 300 or while the pressure gas is sent from the pressure increasing valve 10, the pressure from the pressure increasing valve 10 is stored. The pressure gas is supplied to the pressure gas device 300 in a state where the gas pulsation is eliminated.

  Therefore, the pressure gas auxiliary supply device 100 according to claim 1 can reuse all of the gas energy discharged from the pressure increasing valve 10 while using the pressure increasing valve 10 useful for energy saving. Thus, the durability can be improved and the energy saving in the pressure gas supply source 200 can be achieved.

Moreover, in order to solve the said subject, the means which the invention which concerns on Claim 2 took about the pressure gas auxiliary supply apparatus 100 of the said Claim 1,
“The tank device 30 is integrated with the booster valve 10, the compressor 20, and the check valve and other devices necessary for them”
It is.

  The invention according to claim 2 is that the pressurized gas auxiliary supply device 100 according to the invention is as shown in FIG. 1, and all the components shown in FIG. 2 are mounted on the tank device 30. It is characterized by this. As shown in FIG. 1, if devices such as the pressure increasing valve 10, the compressor 20, and a check valve necessary for these are integrated in the tank device 30, the pressure gas auxiliary supply device 100 can be newly installed and transported. As a matter of course, the pressure gas supply source 200 can be easily connected to or connected to the pressure gas auxiliary supply device 100 by connecting the pipe 210 from the pressure gas supply source 200 and the pipe 63 from the pressure gas device 300 to the pressure gas auxiliary supply device 100. Energy saving can be achieved more effectively.

  Further, by integrating the pressure increasing valve 10 and the compressor 20 into the tank device 30, not only the piping 61 to the piping 67 necessary as the pressure gas auxiliary supply device 100 can be greatly reduced, but also the pressure increasing valve 10 and the compressor 20. Furthermore, the operation and maintenance of the tank device 30 and the like can be performed immediately near the tank device 30.

  Therefore, the pressure gas auxiliary supply device 100 according to the second aspect of the present invention exhibits the same function as that of the first aspect of the present invention, and can be easily installed, transported, operated and maintained.

Furthermore, in order to solve the above problem, the means taken by the invention according to claim 3 will be described with reference numerals used in the embodiments described later.
“A plurality of pressure gas devices 300 operated by the pressure gas from the pressure gas supply source 200 are connected in parallel to one pressure gas supply source 200 via a pipe 210, and immediately before each pressure gas device 300. A pressure gas supply system in which each pressure gas auxiliary supply device 100 is interposed in a pipe 210 positioned,
Each pressure gas auxiliary supply device 100 receives the pressure gas from the pressure gas supply source 200 from the intake port 11 and exhausts it from the exhaust port 12 when reciprocating the piston in the cylinder. The pressure increasing valve 10 that pressurizes the pressure gas from 200 and all the exhaust from the exhaust port 12 of the pressure increasing valve 10 are sucked, and this exhausted exhaust is added to the pressure supplied to the intake port 11 of the pressure increasing valve 10. The compressor 20 is supplied to the intake port 11 side after being pressurized, and the tank device 30 is configured so that the pressurized gas pressurized by the pressure increasing valve 10 can be temporarily stored and then supplied to the pressure gas device 300. Pressure gas supply system characterized by having
It is.

  As shown in FIG. 6, the pressurized gas supply system according to the third aspect includes a plurality of the pressurized gas auxiliary supply devices 100 according to the first or second aspect described above, and a piping 210 connected to a single pressurized gas supply source 200. And the energy saving effect by each pressure gas auxiliary supply device 100 is effectively exhibited in the entire system.

  Since the configuration of the pressure increasing valve 10, the compressor 20 or the tank device 30 constituting each of the pressure gas auxiliary supply devices 100 is described in detail in the description of claim 1, the description and FIGS. 1 and 2 are incorporated. At the same time, the reference numerals of the pressure gas auxiliary supply device 100, the pressure gas supply source 200, and the pressure gas device 300 in FIG. 6 are made the same as those in FIG.

  Therefore, in the system of claim 3, while using a plurality of pressure increasing valves 10 useful for energy saving, all of the gas energy discharged from the pressure increasing valve 10 can be reused, and the durability of the compressor 30 is improved. Thus, energy can be saved at the pressure gas supply source 200.

As described above, in the invention of claim 1 or claim 2,
“A pressure gas auxiliary supply device 100 connected via a pipe 210 between a pressure gas supply source 200 and a pressure gas device 300 operated by the pressure gas from the pressure gas supply source 200,
When the pressure gas from the pressure gas supply source 200 is received from the intake port 11 and the piston in the cylinder is reciprocated, the pressure gas from the pressure gas supply source 200 is pressurized by exhausting from the exhaust port 12. A pressure valve 10;
The compressor 20 supplies all the exhaust from the exhaust port 12 of the pressure increasing valve 10 to the pressure supplied to the intake port 11 of the pressure increasing valve 10 and then supplies the exhaust to the intake port 11 side. When,
And a tank device 30 that can store the pressurized gas pressurized by the pressure increasing valve 10 and then supply the pressurized gas toward the pressure gas device 300. "
The main feature of the compressor is that it is possible to reuse all of the gas energy discharged from the booster valve 10 while using the booster valve 10 useful for energy saving. Therefore, it is possible to provide the pressure gas supply auxiliary device 100 that can also achieve energy saving in the pressure gas supply source.

In the invention according to claim 3,
“A plurality of pressure gas devices 300 operated by the pressure gas from the pressure gas supply source 200 are connected in parallel to one pressure gas supply source 200 via a pipe 210, and immediately before each pressure gas device 300. A pressure gas supply system in which each pressure gas auxiliary supply device 100 is interposed in a pipe 210 positioned,
Each pressure gas auxiliary supply device 100 receives the pressure gas from the pressure gas supply source 200 from the intake port 11 and exhausts it from the exhaust port 12 when reciprocating the piston in the cylinder. The pressure increasing valve 10 that pressurizes the pressure gas from 200 and all the exhaust from the exhaust port 12 of the pressure increasing valve 10 are sucked, and this exhausted exhaust is added to the pressure supplied to the intake port 11 of the pressure increasing valve 10. The compressor 20 is supplied to the intake port 11 side after being pressurized, and the tank device 30 is configured so that the pressurized gas pressurized by the pressure increasing valve 10 can be temporarily stored and then supplied to the pressure gas device 300. What I did "
Therefore, it is possible to reuse all of the gas energy discharged from the pressure increasing valve 10 while using a plurality of pressure increasing valves 10 useful for energy saving. Therefore, it is possible to provide a pressure gas supply system that can improve the performance and can save energy in the pressure gas supply source 200.

It is a perspective view of the pressure gas auxiliary supply device 100 concerning the present invention. It is a piping diagram which shows each member which comprises the same pressure gas auxiliary supply apparatus 100, and the connection state by piping 61 etc. with these each members, the pressure gas supply source 200, and the pressure gas apparatus 300. It is a front view of the compressor 20 which comprises the same pressure gas auxiliary supply apparatus 100. FIG. The compressor 20 is shown, (a) is an enlarged longitudinal sectional view excluding the motor 21, (b) is a sectional view taken along the pressure gas supply source 200-pressure gas supply source 200 line in (a). . The compressor 20 is shown in an exploded view, (a) is a longitudinal exploded view excluding the motor 21, and (b) is taken along the pressure gas auxiliary supply device 100-pressure gas auxiliary supply device 100 line in (a). It is sectional drawing. It is a piping diagram showing the pressure gas supply system of the present invention. It is sectional drawing which shows the technique shown by patent document 1. FIG.

  Next, the pressure gas auxiliary supply device 100 according to the embodiment shown in the drawings will be described for the invention according to each claim configured as described above. The pressure gas auxiliary supply device 100 according to this embodiment is as shown in FIG. 1 to FIG. 5, but from the pressure gas supply system using a plurality of the pressure gas auxiliary supply devices 100, FIG. Will be described with reference to FIG. In addition, although the pressure unit of the pressure gas demonstrated in this embodiment is MPa (megapascal), in order to avoid the redundancy of description, this unit is only described as "M" below.

  In FIG. 6, a plurality of pressure gas devices 300 such as industrial robots that operate mainly with pressure gas energy are installed, and each pressure gas device 300 is connected to one pressure gas supply source 200 via a pipe 210. A schematic plan view of a pressure gas supply system according to the present invention, that is, a factory in which pressure gas can be supplied is shown. Each pressure gas device 300 is connected in parallel to the pressure gas supply source 200 via a pipe 210, and immediately before each pressure gas device 300, the pressure gas auxiliary supply device 100 according to the present invention is connected in series. Arranged.

  In the present embodiment, the pressure gas used in each pressure gas apparatus 300 is assumed to have a pressure of 0.8M to 0.9M. In order to create such a pressure gas, the pressure gas supply source 200 is used. However, a pressure gas of 0.8M to 0.9M can be created. And such a pressure gas is supplied to each pressure gas apparatus 300 via the piping 210, The pressure loss by the piping 210 generate | occur | produces in that case, and it reaches the pressure gas auxiliary supply apparatus 100 which concerns on this invention. In this case, the pressure drops to about 0.2M to 0.4M.

  Therefore, in the pressure gas supply system shown in FIG. 6, in the pressure gas auxiliary supply device 100 according to the present invention, the pressure of the pressure gas lost by depressurization by the pressure increasing valve 10 constituting the pressure gas auxiliary supply device 100 is 0.8 M to. While the pressure is increased to 9M, the entire amount of the exhaust gas discharged from the pressure increasing valve 10 is taken in by the compressor 20 and boosted, and then sent again to the intake port 11 on the pressure increasing valve 10 side. Of course, from the discharge port 13 of the pressure increasing valve 10, the pressure gas of 0.8 M to 0.9 M is sent toward the corresponding pressure gas device 300 through the tank device 30 constituting the pressure gas auxiliary supply device 100. I have to.

  As shown in FIGS. 1 and 2, the pressure gas auxiliary supply device 100 receives the pressure gas from the pressure gas supply source 200 from the intake port 11 and reciprocates the piston in the cylinder. By exhausting from the port 12, the pressure increasing valve 10 that pressurizes the pressure gas from the pressure gas supply source 200 and all the exhaust from the exhaust port 12 of the pressure increasing valve 10 are sucked, and this sucked exhaust is boosted. After the pressure supplied to the intake port 11 is increased to 10, the compressor 20 supplied to the intake port 11 side and the pressurized gas pressurized by the pressure increasing valve 10 are temporarily stored and then directed to the pressure gas device 300. And a tank device 30 that can be supplied.

  As schematically shown in FIG. 2, the pressure increasing valve 10 is a general one having an intake port 11, an exhaust port 12, and a discharge port 13, and the intake port 11 is connected via a pipe 61. The solenoid valve 41 is connected to a pipe 210 from the pressure gas supply source 200 side. The pressure gas boosted by the pressure increasing valve 10 is connected from the discharge port 13 via the pipe 62 to the tank device 30 side constituting the pressure gas auxiliary supply device 100 via the check valve 51. When the pressure gas is increased in the pressure increasing valve 10, the exhaust from the exhaust port 12 of the pressure increasing valve 10 is on the side of the compressor 20 constituting the pressure gas auxiliary supply device 100 via the pipe 64. Sent to. In this embodiment, the pressure of the pressure gas sent to the intake port 11 of the pressure increasing valve 10 is about 0.4 M to 0.6 M, and the pressure is increased by the pressure increasing valve 10 to the tank device 30 side. When it is sent to the pressure gas device 300, it is required to be 0.8M to 0.9M. Further, the pressure of the exhaust discharged from the exhaust port 12 of the pressure increasing valve 10 is about 0.2M to 0.4M.

  Exhaust gas having a pressure of about 0.2M to 0.4M discharged from the exhaust port 12 of the pressure increasing valve 10 is sent to the compressor 20 side shown in FIGS. The compressor 20 in the present embodiment is proposed by the applicant in Patent Document 3, but the compressor 20 is not limited to this, and the pressure increasing valve 10 having a pressure of about 0.2M to 0.4M. As long as the exhaust gas can be pressurized to a pressure of about 0.4 M to 0.6 M supplied to the intake port 11 of the pressure increasing valve 10, it may be anything.

  Although the compressor 20 shown in FIGS. 3 to 5 in this embodiment has excellent sealing performance equivalent to that of a diaphragm pump against various special air supply gases, it cannot be achieved by a conventional compressor. It is intended to be a compact reciprocating two-stage compression type that can be increased in pressure and has excellent durability, and has the following configuration.

  In the case of this embodiment, the compressor 20 connected to the exhaust port 12 of the booster valve 10 as described above includes a common base 22, a motor 21, a cup, as shown in FIGS. 3 to 5. The ring 23 and the compressor main body 24 are configured such that the compressor main body 24 is driven by the motor 21 via the coupling 23.

  The compressor main body 24 includes a casing 25 having a hollow interior fixed on the common base 22, a drive unit 26 built in the casing 25, and a cylinder head unit 27 fixed to the upper portion of the casing 25.

  Next, the configuration of each part of the compressor body 24 will be described in detail with reference to FIGS. 4 to 5. FIG. 4 is a partial cross-sectional view of the compressor body 24 of FIG. 5, and FIG. FIG. 4B is a cross-sectional view of the compressor main body 24 of FIG. 4A as viewed from the arrow of the pressure gas supply source 200 to the pressure gas supply source 200 of the drive unit 26 and the cylinder head unit 27. In addition, in FIG.4 (b), illustration is abbreviate | omitting parts other than the piston 28. FIG. 3 and 4 both show the case where the piston 28 is in the bottom dead center state.

  FIG. 5A is an exploded view of the drive unit 26 and the cylinder head portion 27 of FIG. 4A, and FIG. 5B is an exploded view of the piston pin guide guide 28 portion. In FIG. 4A, a casing 25 serves as a base for the compressor body 24, and is a strong casing having a hollow inside. The side surface is provided with a gas suction port 25a from a target device (not shown) that communicates with the intake chamber and an air supply hole 25b that opens into the intake chamber.

  Further, in the intake chamber on the upper surface of the casing 25, an open / close valve 25c for opening and closing the air supply hole 25b is fixed with a screw 5d each time a piston 28 described later moves up and down. The on-off valve 25c is a copper tongue-shaped piece, and the other end is a cantilever that covers the air supply hole 25b.

  The drive unit 26 is a part that causes a piston 28 described later to cause a crank motion. A key groove 11 that receives a drive force from the coupling 23 is provided at the right end of the crankshaft, and a ball mounted on the casing 25. It is supported horizontally by a bearing so that it can rotate. As shown in the cross-sectional view of FIG. 4B, the crankshaft is eccentric with respect to the rotation center by a displacement distance to the displacement center.

  In the longitudinal direction of the crankshaft, ball bearings 22 are mounted at predetermined intervals, and two plate-like connecting rods that swing around the center of displacement are fitted into the outer ring of the ball bearing 22. Yes. A balance weight is fixed to both sides of the two connecting rods. Although not shown in the drawings, the balance weight is formed in a shape that cancels out the displacement mass displaced from the connecting rod toward the piston pin and the displacement mass from the center of rotation generated by the eccentric distance of the crankshaft.

  A piston pin for pin coupling with a piston shaft 29 suspended from the piston 28 is horizontally inserted in the upper part of the two connecting rods via a cylindrical bearing metal. The bearing structure of the piston pin uses a bearing metal in the present embodiment, but a needle bearing (not shown) may be mounted between the piston pin and the connecting rod in a high discharge pressure type compressor.

  A piston pin holding block for guiding the piston pin so as to be movable up and down is fixed to the lower end of the piston shaft 29 with a bolt at a central portion in the axial direction of the piston pin. That is, as shown in FIG. 4B and FIG. 5B, the piston pin holding block is a block whose longitudinal section has a horizontally long shape, and a bolt through hole for fixing the piston pin holding block in the center. And two guide holes for vertically sliding and guiding the piston pin guide rods on both sides of the bolt through hole.

  Therefore, when the piston pin holding block fixing bolt inserted from below the piston pin holding block is screwed into the female screw 9a provided at the lower part of the piston shaft 29, the piston pin holding block is integrated with the lower end of the piston shaft 29. Can be fixed. Further, as shown in FIG. 4A, the piston pins are formed in a cantilevered manner in the horizontal direction from both side surfaces of the piston pin holding block, and are connected to the connecting rod via a bearing metal.

  As shown in FIGS. 4B and 5B, the piston shaft guide rod is inserted into the two recesses 23 formed in the back surface of the casing 25 across the center line at a support interval. And a pipe fixing bolt b for fixing the pipe by screwing it into a female screw c inserted into the pipe from below and screwed at the tip of the concave portion of the casing 25. The piston shaft guide rod may be a simple guide bolt (not shown) in which a pipe is omitted.

  Further, the casing 25 penetrating portion of the piston shaft 29 is shaft-sealed by an oil seal 20 located on the connecting rod side and a gas seal 21 located on the piston 28 side. Therefore, according to the drive unit 26 described above, when the crankshaft is driven by the motor 21 to perform the crank motion, the connecting rod swings in the vertical direction in the figure. As a result, the two piston pins move up and down, and at the same time, the piston pin holding block also reciprocates in the vertical direction.

  In this case, the piston pin holding block slides in the vertical direction in the figure using the piston pin guide rod as a guide, and moves up and down with a stroke twice the displacement distance. When the piston pin holding block moves up and down, the piston shaft 29 is fixed to the lower portion of the piston 28 integrally with the piston 28, so that the piston 28 also moves up and down within the stroke range at the same time.

  At this time, if the casing 25 described above is a sealed crankcase, an oil supply reservoir (not shown) can be provided therein, and the entire drive unit 26 can be splashed and a lubricating structure of an oil supply system can be obtained. .

  Next, the configuration of the cylinder head portion 27 will be described in detail with reference to FIG. As shown in FIG. 5, the cylinder head portion 27 used in the compressor of the present invention has a different diameter piston 28, a large diameter cylinder that surrounds the large diameter portion 28 a from the outer peripheral surface, and a small diameter portion 28 b. And a valve body fixed to the upper surface of the small diameter portion 28b, and an uppermost cylinder head.

  Among these, as shown in FIG. 4, the different-diameter piston 28 has a large-diameter portion 28a having a large outer diameter and an uppermost small-diameter portion having a smaller outer diameter than the large-diameter portion 28a. 28b and a cooling connection portion that connects both of them and has an outer diameter smaller than that of the small diameter portion 28b. Piston seal grooves are formed on the outer peripheral surfaces of the large diameter portion 28a and the large diameter portion 28a, respectively. ing. That is, due to the outer diameter relationship of these parts, the different diameter piston 28 is a two-stage piston having different diameters.

  Further, a plurality of piston ring mounting grooves are formed on the outer circumferences of the large-diameter portion 28a and the small-diameter portion 28b, respectively, and the piston shaft fixing bolt 29 (see FIG. 4B) is formed on the inner center line. (See)), a bolt head accommodation hole in the upper part, and an upper insertion hole in the piston shaft 29 in the lower part.

  In addition, the piston 28 is lowered to the position eccentric from the through hole, so that the first-stage compression is performed on the gas formed in the intake chamber (see FIG. 5C) formed below the large-diameter portion 28a. And a first-stage compressed gas supply hole for supplying the compressed gas to a compression chamber formed above the small-diameter portion 28b.

  Further, on the upper surface of the small-diameter portion 28b of the different-diameter piston 28, the first-stage compressed gas supply hole is opened and closed each time the different-diameter piston 28 moves up and down. The valve (see FIG. 5A) is fixed with a screw (not shown).

  A plurality of cooling fins are formed on the upper outer peripheral surface of the small-diameter cylinder, and a recycle gas discharge port for guiding the gas in the cooling chamber to the outside is provided at the lower portion.

  The cylinder head 27 is a member that closes the opening of the small-diameter cylinder via a valve body, and has a compressed gas reservoir chamber and a compressed gas discharge port provided therein. As shown in FIG. 4A, the above-described members are stacked on the casing 25 and fixed on the cylinder head 27 and the valve body casing 25 with a small diameter cylinder and a fixing bolt that penetrates the large diameter cylinder.

  With the above configuration, the outer peripheral surface from the large-diameter portion 28a to the small-diameter portion 28b of the different-diameter piston 28 is provided between the different-diameter piston 28 and the large-diameter cylinder and the small-diameter cylinder. And a cooling chamber defined by the large diameter cylinder and the inner peripheral surface of the small diameter cylinder.

  The compressor 20 configured as described above pressurizes the exhaust supplied through the pipe 64 to the pressure supplied to the intake port 11 of the pressure increasing valve 10, that is, 0.4M to 0.6M. Then, the air is supplied from the exhaust port (not shown) to the intake port 11 side of the pressure increasing valve 10 through the pipe 65 and the pipe 66.

  A check valve 52 is provided between the pipe 65 and the pipe 66 connecting the exhaust port of the compressor 20 and the intake port 11 of the pressure increasing valve 10, and the pressure increasing valve from the pressure gas supply source 200 is provided. When the pressure gas pressure to 10 is high, the pressure gas is prevented from entering the compressor 20 side. Further, the piping 65 is provided with an electromagnetic valve 42 in parallel with the check valve 52 and the muffler 22 in the piping 67 on the downstream side. These mufflers 22 and solenoid valves 42 exhaust the pressure in the pipe 65 on the exhaust side of the compressor 20 higher than 0.4M to 0.5M so that the compressor 20 can operate within the rated range. It is for making.

  On the other hand, as described above, the pressure gas produced by the pressure increasing valve 10 is pressurized to 0.8 M to 0.9 M required by the pressure gas device 300, and the pipe 62 in FIG. The valve 31 is interposed between the tank device 30 and the pressure gas device 300, and the pressure gas to the pressure gas device 300 is opened and closed by opening and closing the valve 31. Is controlled. In addition, since the pressure gas is stored in the tank device 30 until the pressure gas is supplied to the pressure gas device 300 or while the pressure gas is sent from the pressure increasing valve 10, the pressure from the pressure increasing valve 10 is stored. The pressure gas is supplied to the pressure gas device 300 in a state where the gas pulsation is eliminated.

  In the tank device 30 of the present embodiment, the pressure gas is supplied to the pressure gas device 300 by releasing the valve 31 shown in FIG. 2, but when the pressure in the tank device 30 becomes a predetermined value or less, the pressure is supplied. The switch 32 is actuated, and the booster valve 10 and the compressor 20 are actuated by a signal from the pressure switch 32.

  The pressure gas auxiliary supply device 100 configured as described above may be applicable even when the pressure gas device 300 is a “leak tester”, for example. In the leak inspection, a gas that is easy to detect, such as nitrogen gas or helium gas, is used. In order to use these gases effectively, from the pressure gas apparatus 300 of a gas that is easy to detect such as nitrogen gas or helium gas. The exhaust gas is sent to the compressor 20 described above, and the gas from the pressurized gas supply source 200 such as a cylinder is increased by the pressure increasing valve 10. When these gas pressures are less than or equal to the pressure required by the leak tester or when the gas in the cylinder is low, if the pressure increasing valve 10 or the compressor 20 is operated, nitrogen gas, helium gas, etc. This is because the amount of leak detection gas used can be reduced.

DESCRIPTION OF SYMBOLS 100 Pressure gas auxiliary supply apparatus 10 Booster valve 11 Intake port 12 Exhaust port 13 Discharge port 20 Compressor 21 Motor 22 Muffler 30 Tank apparatus 31 Valve 32 Pressure switch 41/42 Solenoid valve 51/52 Check valve 61-67 Piping 200 Pressure gas Supply source 300 Pressure gas equipment

Claims (3)

A pressure gas auxiliary supply device connected via a pipe between a pressure gas supply source and a pressure gas device operated by the pressure gas from the pressure gas supply source,
A pressure increasing valve that pressurizes the pressure gas from the pressure gas supply source by receiving the pressure gas from the pressure gas supply source from the intake port and exhausting from the exhaust port when reciprocating the piston in the cylinder; ,
A compressor that sucks all the exhaust from the exhaust port of the booster valve, pressurizes the sucked exhaust to a pressure supplied to the intake port of the booster valve, and then supplies the compressor to the intake port side;
A pressure gas auxiliary supply device comprising: a tank device configured to temporarily store pressurized gas pressurized by the pressure increasing valve and then supply the pressurized gas to the pressure gas device.   The pressure gas auxiliary supply device according to claim 1, wherein the tank device is integrated with devices such as the pressure increasing valve, a compressor, and a check valve necessary for these. A plurality of pressure gas devices operated by the pressure gas from the pressure gas supply source are connected in parallel through a pipe to one pressure gas supply source, and each of the pipes located immediately before each pressure gas apparatus is connected to the pressure gas supply source. A pressure gas supply system provided with a pressure gas auxiliary supply device,
Each of the pressure gas auxiliary supply devices receives the pressure gas from the pressure gas supply source from the intake port and exhausts it from the exhaust port when reciprocating the piston in the cylinder. A pressure-increasing valve that pressurizes the pressure gas, and all the exhaust from the exhaust port of the pressure-increasing valve, and the exhausted air is pressurized to the pressure supplied to the intake port of the pressure-increasing valve, A compressor that is supplied to the intake port side, and a tank device that can temporarily store the pressurized gas pressurized by the pressure increasing valve and then supply the pressurized gas to the pressure gas device. Pressure gas supply system.

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