JP2016160974A - Gas supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas supply device capable of easily selecting gas in any one of a plurality of gas cylinders that should be preferentially consumed.SOLUTION: A gas supply device 101 comprises first and second cylinder connection parts 11, 12, a first pressure reduction unit 13 for decreasing pressure down to a first pressure, a second pressure reduction unit 14 for reducing gas down to a second pressure lower than the first pressure, a changing-over valve 10 capable of changing-over to a first passage 81 and a second passage 82 through operation from outside, a third pressure reducer 15 in the midway part of the second passage 82 for reducing pressure to a third pressure lower than the second pressure, a third passage 83 for guiding gas flowed in from a first confluent part 17 to a second confluent part 18 through a first check valve 21, a fourth passage 84 for merging gas flowed in from the second pressure reducer 14 to the second confluent part 18 through a second check valve 22, a fourth pressure reducer 16 for decreasing gas to a fourth pressure lower than the third pressure, and a gas outlet 9 for feeding out gas outside.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a gas supply device.

  A gas supply device used in a field that requires gas may have a plurality of cylinders connected to ensure a sufficient amount of gas. A decompressor is disposed at the connection from each cylinder, and the pressure in each cylinder is once lowered to some pressure and then used. Also, especially in the medical field, if the gas supply is interrupted, it may cause a serious situation. Therefore, in the part where the gas from each cylinder joins, adopt a form that joins via a check valve. The flow from the supplier with the highest pressure is automatically selected and consumed. Therefore, even when the pressure of one cylinder is lowered and cannot be used, the gas can be continuously supplied from another cylinder automatically.

  However, there is a case where it is desired to preferentially consume gas stored in any one of the plurality of cylinders. For example, generally, when one of the cylinders has just been replaced, it is desirable to preferentially consume the gas of another cylinder over the cylinder immediately after the replacement.

  In such a case, by changing the set value of the decompressor provided for each cylinder so that the gas from the desired cylinder has the highest pressure, the gas from the cylinder It can be preferentially consumed.

  An example of such a switcher is “Medical Gas Safety Management Engineer Continuing Workshop Text” (2012 revision issued, edited / issued by Medical Device Center), pages 166-169 (Non-patent Document 1). Have been described.

“Medical Gas Safety Management Engineer Continuing Workshop Text” (Revised in 2012, edited / published by Medical Device Center) pp. 166-169

  Generally, a strong force is required to change the set values of the decompressors, and in order to change the magnitude relationship between the gas pressures from multiple cylinders, the set values of the multiple decompressors must be changed. In other words, it was a heavy burden on the user. Non-Patent Document 1 describes a device that can reverse the magnitude relationship of pressure by collectively switching set values of a plurality of decompressors by rotating one handle. However, since the rotation of the handle is linked to the adjustment of the set value of the decompressor, the operation of the handle itself requires a strong force, which is a burden on the user.

  Therefore, an object of the present invention is to provide a gas supply device that can easily select which cylinder gas among a plurality of cylinders should be preferentially consumed.

  In order to achieve the above object, a gas supply apparatus according to the present invention includes a first cylinder connecting portion that receives a first cylinder, a second cylinder connecting portion that receives a second cylinder, and a gas obtained from the first cylinder connecting portion. From the first pressure reducer, the second pressure reducer to reduce the gas obtained from the second cylinder connection part to a second pressure lower than the first pressure, and the first pressure reducer. A switching valve capable of switching an outflow destination of the inflowing gas to the first path and the second path by an external operation, and a third gas whose pressure is lower than the second pressure in the middle of the second path. A third decompressor for reducing the pressure to a pressure; a first joining part for joining the gas obtained from the first path and the gas flowing in from the second path through the third decompressor; and the first joining part Gas flowing in from the first check valve A third path that leads to the second junction, a fourth path that joins the gas flowing in from the second pressure reducer to the second junction through the second check valve, and a second path that flows in from the second junction A fourth pressure reducer for reducing the gas to a fourth pressure lower than the third pressure; and a gas outlet for sending the gas obtained from the fourth pressure reducer to the outside.

  According to the present invention, it is possible to easily select which cylinder gas should be preferentially consumed among a plurality of cylinders.

It is a conceptual diagram of the gas supply apparatus in Embodiment 1 based on this invention. It is a conceptual diagram of the gas supply apparatus in Embodiment 2 based on this invention. It is a conceptual diagram of the gas supply apparatus in Embodiment 3 based on this invention. It is a conceptual diagram of the gas supply apparatus in Embodiment 4 based on this invention. It is a front view of the gas supply apparatus in Embodiment 5 based on this invention. It is a side view of the gas supply apparatus in Embodiment 5 based on this invention. It is a top view of the gas supply apparatus in Embodiment 5 based on this invention.

(Embodiment 1)
(Constitution)
With reference to FIG. 1, the gas supply apparatus in Embodiment 1 based on this invention is demonstrated.

  The gas supply apparatus 101 according to the present embodiment is configured to supply the gas obtained from the first cylinder connection unit 11 that receives the first cylinder 31, the second cylinder connection unit 12 that receives the second cylinder 32, and the first cylinder connection unit 11. A first pressure reducer 13 for reducing the pressure to the first pressure, a second pressure reducer 14 for reducing the gas obtained from the second cylinder connection portion 12 to a second pressure lower than the first pressure, and a first pressure reducer 13 The switching valve 10 that can switch the outflow destination of the gas flowing in from the first path 81 and the second path 82 by an external operation, and the pressure of the gas flowing in the middle of the second path 82 is the second pressure. A third pressure reducer 15 for reducing the pressure to a lower third pressure, a first joining portion 17 for joining the gas obtained from the first path 81 and the gas flowing in from the second path 82 via the third pressure reducer 15; , 1st junction 7, a third path 83 that guides the gas flowing in from 7 through the first check valve 21 to the second merging section 22, and the gas flowing in from the second pressure reducer 14 through the second check valve 22, the second merging section 18. A fourth path 84 for merging with the second merging section 18, a fourth decompressor 16 for depressurizing the gas flowing in from the second merging portion 18 to a fourth pressure lower than the third pressure, and a gas obtained from the fourth decompressor 16 to the outside And a gas outlet 9 to be sent out.

  Assuming that the first to fourth pressures are P1, P2, P3, and P4, respectively, P1> P2> P3> P4. For example, P1 = 0.75 MPa. For example, P2 = 0.6 MPa. For example, P3 = 0.5 MPa. For example, P4 = 0.38 MPa. It is conceivable that the fourth pressure is a value determined by a standard or the like as a pressure during use.

  The first cylinder 31 and the second cylinder 32 are connected to or attached to the gas supply apparatus 101, but are not part of the gas supply apparatus 101.

(Operation)
For convenience of explanation, it is assumed that the gas pressure of the first cylinder 31 is PX and the gas pressure of the second cylinder 32 is PY. In a new state of the first cylinder 31, PX> P1. In a new state of the second cylinder 32, PY> P2. As the remaining amount of gas in each cylinder decreases, PX and PY decrease. Depending on the type of gas, there may be a slow decrease, and there may be a sudden decrease at any stage along the way.

(If you want to use the gas in the first cylinder with priority)
When it is desired to use the gas in the first cylinder 31 with priority over the gas in the second cylinder 32, the switching valve 10 is operated in advance so that the first path 81 is selected from the first path 81 and the second path 82. Just set it up. When set in this way, the gas in the first cylinder 31 is decompressed from the pressure PX to the first pressure P1 by the first decompressor 13, and passes through the first path 81 while maintaining the pressure P1. 17, and further to the first check valve 21. On the other hand, the gas in the second cylinder 32 is depressurized from the pressure PY to the second pressure P2 by the second decompressor 14, and reaches the second check valve 22 through the fourth path 84 while maintaining the pressure P2. Since the first pressure P1 on the upstream side of the first check valve 21 is larger than the second pressure P2 on the upstream side of the second check valve 22, the second merging portion 18 is connected to the first cylinder 31 from the first cylinder 31. Gas flows in at the first pressure P1, and the gas from the second cylinder 32 does not flow in. This gas is then depressurized by the fourth decompressor 16 to a fourth pressure P4. The gas at the fourth pressure P4 can be taken out from the gas outlet 9. In this state, the gas in the first cylinder 31 continues to be consumed.

  When the pressure PX decreases due to the decrease in the remaining amount of the first cylinder 31 and P2 <PX <P1, the following occurs. Since PX <P1, the gas from the first cylinder 31 is not decompressed by the first decompressor 13 and reaches the first check valve 21 with the pressure PX as it is. Since PX> P2, the gas from the first cylinder 31 flows into the second junction 18 at the pressure PX, and the gas from the second cylinder 32 does not flow in. This gas is then depressurized by the fourth decompressor 16 to a fourth pressure P4. The gas at the fourth pressure P4 can be taken out from the gas outlet 9. In this state, the gas in the first cylinder 31 continues to be consumed.

  When PX <P2 due to a further decrease in the remaining amount of the first cylinder 31, the following occurs. Since PX <P2, the gas from the first cylinder 31 does not flow into the second junction 18, and instead the gas from the second cylinder 32 starts to flow at the second pressure P2. This gas is then depressurized by the fourth decompressor 16 to a fourth pressure P4. The gas at the fourth pressure P4 can be taken out from the gas outlet 9. Thereafter, the gas in the second cylinder 32 continues to be consumed.

  When the pressure PY decreases due to the decrease in the remaining amount of the second cylinder 32 and PY <P2, the following occurs. Since PY <P2, the gas from the second cylinder 32 is not decompressed by the second decompressor 14 and reaches the second check valve 22 with the pressure PY as it is. Since the pressure PX is on the upstream side of the first check valve 21 and the pressure PY is on the upstream side of the second check valve 22, the functions of the first check valve 21 and the second check valve 22 are the same. Thus, the higher gas of PX and PY is automatically selected and flows into the second junction 18. Hereinafter, the gas in the first cylinder 31 and the second cylinder 32 continues to be consumed until both the pressures PX and PY have decreased below the fourth pressure P4.

(If you want to use the gas in the second cylinder with priority)
When it is desired to use the gas in the second cylinder 32 with priority over the gas in the first cylinder 31, the switching valve 10 is operated in advance so that the second path 82 is selected from the first path 81 and the second path 82. Just set it up. When set in this way, the gas in the first cylinder 31 is depressurized from the pressure PX to the first pressure P1 by the first decompressor 13, and flows into the second path 82 with the pressure P1 maintained. There is a third decompressor 15 in the middle of the second path 82, and since P1> P3, the pressure is reduced from P1 to P3. This gas reaches the first junction 17 at the pressure P3 and further reaches the first check valve 21. On the other hand, the gas in the second cylinder 32 is depressurized from the pressure PY to the second pressure P2 by the second decompressor 14, and reaches the second check valve 22 through the fourth path 84 while maintaining the pressure P2. Since the second pressure P2 on the upstream side of the second check valve 22 is larger than the first pressure P3 on the upstream side of the first check valve 21, the second merging portion 18 is provided with a second cylinder 32. Gas flows in at the second pressure P2, and the gas from the first cylinder 31 does not flow in. This gas is then depressurized by the fourth decompressor 16 to a fourth pressure P4. The gas at the fourth pressure P4 can be taken out from the gas outlet 9. In this state, the gas in the second cylinder 32 continues to be consumed.

  When the pressure PY decreases due to the decrease in the remaining amount of the second cylinder 32 and P3 <PY <P2, the following occurs. Since PY <P2, the gas from the second cylinder 32 is not decompressed by the second decompressor 14 and reaches the second check valve 22 with the pressure PY as it is. Since PY> P3, the gas from the second cylinder 32 flows into the second merging portion 18 at the pressure PY, and the gas from the first cylinder 31 does not flow in. This gas is then depressurized by the fourth decompressor 16 to a fourth pressure P4. The gas at the fourth pressure P4 can be taken out from the gas outlet 9. In this state, the gas in the second cylinder 32 continues to be consumed.

  When PY <P3 due to a further decrease in the remaining amount of the second cylinder 32, the following occurs. Since PY <P3, the gas from the second cylinder 32 does not flow into the second junction 18 and instead the gas from the first cylinder 31 starts to flow at the third pressure P3. This gas is then depressurized by the fourth decompressor 16 to a fourth pressure P4. The gas at the fourth pressure P4 can be taken out from the gas outlet 9. Thereafter, the gas in the first cylinder 31 continues to be consumed.

  When the pressure PX decreases due to a decrease in the remaining amount of the first cylinder 31 and PX <P3, the following occurs. Since PX <P3 <P1, the gas from the first cylinder 31 is not depressurized not only in the first pressure reducer but also in the third pressure reducer 15, and reaches the first check valve 21 with the pressure PX as it is. Since the pressure PX is on the upstream side of the first check valve 21 and the pressure PY is on the upstream side of the second check valve 22, the functions of the first check valve 21 and the second check valve 22 are the same. Thus, the higher gas of PX and PY is automatically selected and flows into the second junction 18. Hereinafter, the gas in the first cylinder 31 and the second cylinder 32 continues to be consumed until both the pressures PX and PY have decreased below the fourth pressure P4.

(Action / Effect)
According to the present embodiment, it is possible to determine which of the two cylinders is to be used preferentially depending on which of the two paths is selected by operating the switching valve 10. If you select the cylinder that you want to use for the first time, as the gas pressure from the cylinder decreases as the gas is used, the supply source to the unselected cylinder from the selected cylinder Switching is done automatically.

  In the present embodiment, the cylinder can be selected not by adjusting the set value of the decompressor, but by selecting the gas flow path, so the target to be operated by the user is not the adjusting screw of the decompressor, etc. This is a switch of the switching valve. Therefore, it can be easily operated without requiring a strong force. Therefore, in the gas supply apparatus according to the present embodiment, it is possible to easily select which cylinder gas among the plurality of cylinders should be preferentially consumed.

  Here, for convenience of explanation, the description has been made up to the stage where both the pressure of the first cylinder 31 and the pressure of the second cylinder 32 are reduced below the fourth pressure P4. It is preferable to finish the gas use work at an earlier stage. Alternatively, when it is necessary to continue the gas use work for a longer time, it is desirable to replace any cylinder at an appropriate timing.

(Embodiment 2)
(Constitution)
With reference to FIG. 2, the gas supply apparatus in Embodiment 2 based on this invention is demonstrated. The gas supply apparatus 102 in the present embodiment is the same as the gas supply apparatus 101 described in the first embodiment with respect to the basic configuration, but differs in the following points.

  The gas supply device 102 in the present embodiment includes a pressure gauge 8 between the fourth pressure reducer 16 and the gas outlet 9.

(Action / Effect)
Also in the present embodiment, the effect described in the first embodiment can be obtained. Furthermore, since the gas supply apparatus 102 in the present embodiment includes the pressure gauge 8 at a position downstream of the fourth pressure reducer 16 that performs the final pressure reduction and upstream of the gas outlet 9, the gas supply device 102 currently takes out from the gas outlet 9. The gas pressure that can be obtained can be clearly grasped. Therefore, the user can use the gas with peace of mind.

(Embodiment 3)
(Constitution)
With reference to FIG. 3, the gas supply apparatus in Embodiment 3 based on this invention is demonstrated. The gas supply apparatus 103 in the present embodiment is the same as the gas supply apparatus 101 described in the first embodiment with respect to the basic configuration, but differs in the following points.

  In the gas supply apparatus 103 according to the present embodiment, the first pressure switch 23 disposed between the first pressure reducer 13 and the switching valve 10 and the pressure detected by the first pressure switch 23 are lower than a certain reference. A first alarm device 25 that sometimes issues an alarm is provided.

(Action / Effect)
The “certain standard” for the first alarm device 25 to issue an alarm is preferably a pressure slightly higher than the second pressure P2. If set in this way, when the pressure of the gas from the first cylinder 31 decreases and approaches the second pressure P2, the first alarm device 25 can issue an alarm. This is because it is possible to know that the first cylinder 31 should be replaced.

  According to the present embodiment, the user can accurately grasp the time when the first cylinder 31 should be replaced. When the first cylinder 31 is removed for replacement, the gas from the second cylinder 32 continues to flow into the second junction 18 due to the action of the first check valve 21 and the second check valve 22. The supply of gas from the gas outlet 9 to the outside does not stop.

  The gas supply device 103 in the present embodiment issues a warning when the second pressure switch 24 arranged in the middle of the fourth path 84 and the pressure detected by the second pressure switch 24 are lower than a certain reference. The second alarm device 26 is preferably provided.

  At this time, the “certain standard” for the second alarm device 26 to issue an alarm is preferably a pressure slightly higher than the third pressure P3. If set in this way, the second alarm device 26 can issue an alarm when the pressure of the gas from the second cylinder 32 decreases and approaches the third pressure P3. This is because it is possible to know that the second cylinder 32 should be replaced.

  As with the gas supply device 103 shown in FIG. 3, it is preferable to include all of the first pressure switch 23, the first alarm device 25, the second pressure switch 24, and the second alarm device 26. This is because, with this configuration, even when any cylinder is preferentially used, the replacement timing of each cylinder can be known by an alarm.

  The “alarm” here is preferably one that informs the user by sound, light, or both. As shown in FIG. 3, the first alarm device 25 preferably includes a first alarm lamp 25a. The second alarm device 26 preferably includes a second alarm lamp 26a. The alarm device may be one that visually informs the user by means other than the lamp. The alarm device may notify the user by an electrical signal, digital information, radio waves, vibration, or the like.

(Embodiment 4)
(Constitution)
With reference to FIG. 4, the gas supply apparatus in Embodiment 4 based on this invention is demonstrated. The gas supply apparatus 104 in the present embodiment is the same as the gas supply apparatus 103 described in the third embodiment with respect to the basic configuration, but differs in the following points.

  The gas supply device 104 according to the present embodiment includes a first load sensor 28 that detects the weight of the first cylinder 31, and the first alarm device 25 detects the weight of the first cylinder 31 that is detected by the first load sensor 28. Alerts when becomes lighter than a certain standard.

(Action / Effect)
In the present embodiment, in detecting that the remaining amount of the first cylinder 31 is decreasing, not only the pressure detected by the first pressure switch 23 but also the first cylinder 31 detected by the first load sensor 28 is used. Since the weight of the first cylinder 31 is monitored to a certain extent, it can be detected more reliably.

  The configuration may be such that the weight of the first cylinder 31 is monitored only by detection by the first load sensor 28 without being detected by the first pressure switch 23, but between the first pressure switch 23 and the first load sensor 28. It is more preferable to monitor the remaining amount of the first cylinder 31 by using both.

  As shown in FIG. 4, the gas supply device 104 according to the present embodiment includes a second load sensor 29 that detects the weight of the second cylinder 32, and the second alarm device 26 includes the second load sensor 29. It is preferable to issue an alarm when the weight of the second cylinder 32 detected by the above becomes lighter than a certain reference. The monitoring of the remaining amount of the second cylinder 32 is the same as the monitoring of the remaining amount of the first cylinder 31. That is, the second pressure switch 24 and the second load sensor 29 may be configured such that the weight of the second cylinder 32 is monitored only by the detection by the second load sensor 29 without being detected by the second pressure switch 24. It is more preferable to monitor the remaining amount of the second cylinder 32 by using both of them.

  In addition, although it can be said that it is common in several embodiment demonstrated so far, it is preferable that both the 1st cylinder 31 and the 2nd cylinder 32 are cylinders of medical gas. Examples of the medical gas include oxygen, carbon dioxide, and laughter. It is preferable that the 1st cylinder 31 and the 2nd cylinder 32 are accommodated in a cylinder in a liquid state, and are used at a work site. When the gas stored in the cylinder is in a liquid state, the rate of decrease in the gas pressure during the process in which the remaining amount of the cylinder decreases as the gas is used is not constant. When the gas in the cylinder is exhausted, the pressure tends to suddenly drop. Therefore, it is important to specify the priority order of the cylinders and grasp the time when the cylinders should be exchanged, and the benefits from the effects described in the above embodiments are remarkable. For example, in the case of carbon dioxide and laughing gas, since it is contained in a cylinder in a liquid state and used at the work site, the first cylinder 31 and the second cylinder 32 are carbon dioxide or laughing gas cylinders. The advantages of the effects described in the above embodiments are remarkable.

(Embodiment 5)
(Constitution)
With reference to FIGS. 5-7, the gas supply apparatus in Embodiment 5 based on this invention is demonstrated. A front view, a side view, and a plan view of the gas supply apparatus 105 in the present embodiment are shown in FIGS. The gas supply device 105 in the present embodiment is the same as the gas supply device 103 described in the third embodiment with respect to the basic configuration, but differs in the following points.

  The gas supply apparatus 105 in the present embodiment includes a cylinder holding unit 1 that holds the first cylinder and the second cylinder, and a caster 2 that can move the cylinder holding unit 1 and the gas outlet 9 integrally.

  As shown in FIG. 5, the front plate 3 is arranged on the front side, so that the cylinder cannot be seen from the front. A display unit 5 is provided on the upper side of the front plate 3 as a flat portion facing obliquely upward. The display unit 5 is provided with a pressure gauge 8, a first alarm lamp 25a, and a second alarm lamp 26a. A changeover switch 6 and a gas outlet 9 are arranged on the front plate 3. The changeover switch 6 is included in the changeover valve 10. The changeover switch 6 is a switch for operating the changeover valve 10. The first alarm lamp 25 a is included in the first alarm device 25. The second alarm lamp 26 a is included in the second alarm device 26. For example, when an alarm is issued by each alarm device, each alarm lamp blinks and a sound is emitted. Each of the first alarm lamp 25a and the second alarm lamp 26a may also serve as a release button. When the 1st warning lamp 25a and the 2nd warning lamp 26a serve also as a cancellation | release button, the mechanism which will be in a lighting state after being pushed as a cancellation | release button may be sufficient. For example, the first alarm lamp 25a and the second alarm lamp 26a may be in a constantly lit state during normal operation before an alarm is issued. By always lighting in this way during normal operation, it can be shown to the user that the alarm device is functioning normally.

  As shown in FIGS. 6 and 7, the gas supply apparatus 105 includes an apparatus main body 27. The apparatus main body 27 is disposed so as to occupy the front position in the entire gas supply apparatus 105. The display unit 5, the changeover switch 6 and the gas outlet 9 are provided in the apparatus main body 27.

  6 and 7 show the gas supply device 105 in a state where no cylinder is attached. The first cylinder connection part 11 and the second cylinder connection part 12 are connected to the apparatus main body 27 by a gas pipe 19. The gas pipe 19 is flexible, and when the cylinder is not attached, the first cylinder connecting part 11 and the second cylinder connecting part 12 actually hang down from the upper part of the apparatus main body 27. However, in FIG. 6 and FIG. 7, for the convenience of explanation, the first cylinder connection part 11 and the second cylinder connection part 12 are displayed at the positions when the cylinders are mounted.

  As shown in FIGS. 6 and 7, the two cylinders are attached to the cylinder holding portion 1 so as to be seen from the upper side and the side. Frames 4 are arranged on the left and right sides so as to sandwich the cylinder holding portion 1 to protect the cylinder. A power cable 7 extends rearward from the apparatus main body 27.

  The casters 2 are provided at the four corners of the lower surface in this example, and the entire gas supply device 105 can be smoothly moved by the casters 2.

(Action / Effect)
In this Embodiment, since the caster 2 which can move the cylinder holding | maintenance part 1 and the gas outlet 9 integrally is provided, a user can move easily at the time of use. Therefore, it can be set as the gas supply apparatus excellent in portability.

  Here, the four casters 2 on the lower surface of one gas supply device 105 are provided, but the number of the casters 2 may be other than four. In FIG. 5, one caster 2 is displayed so as to include two wheels, but this is only an example, and the structure of the caster 2 is not limited to this.

  The appearance of the gas supply apparatus 105 shown in this embodiment is merely an example, and the present invention is not limited to this.

  In addition, although it can be said that it is common in several embodiment demonstrated so far, it is preferable that the gas outlet 9 is provided with the connector by which what was called gas specification was carried out. In other words, the gas outlet 9 preferably includes a connector having a shape corresponding to the type of gas. Here, the “shape corresponding to the type of gas” is a predetermined shape so as to correspond one-to-one with the type of gas. The "shape corresponding to the type of gas" can be connected only when the connectors for different types of gas cannot be geometrically connected even if they are connected, but only when the connectors are for the same type of gas. It is a shape that takes into account. By adopting this configuration, it is possible to prevent connection mistakes at the gas use site.

  Although it is assumed that the gas supply device shown in the above embodiments is used as a supply device for medical gas, it can also be used for gases other than medical gas. Although the gas supply apparatus shown in each of the above embodiments is suitable for use in a medical field, it may be used outside a medical field.

In addition, you may employ | adopt combining suitably two or more among the said embodiment.
In addition, the said embodiment disclosed this time is an illustration in all the points, Comprising: It is not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and includes all modifications within the scope and meaning equivalent to the terms of the claims.

  1 cylinder holding part, 2 casters, 3 front plate, 4 frame, 5 display part, 6 selector switch, 7 power cable, 8 pressure gauge, 9 gas outlet, 10 selector valve, 11 first cylinder connecting part, 12 second cylinder Connection part, 13 1st decompressor, 14 2nd decompressor, 15 3rd decompressor, 16 4th decompressor, 17 1st junction part, 18 2nd junction part, 19 Gas pipe, 21 1st check valve, 22 second check valve, 23 first pressure switch, 24 second pressure switch, 25 first alarm device, 25a first alarm lamp, 26 second alarm device, 26a first alarm lamp, 27 device main body, 28 first Load sensor, 29 2nd load sensor, 31 1st cylinder, 32 2nd cylinder, 81 1st path, 82 2nd path, 83 3rd path, 84 4th path, 101, 102, 103, 104, 105 Supply device.

Claims (9)

A first cylinder connection for receiving the first cylinder;
A second cylinder connection for receiving the second cylinder;
A first pressure reducer for reducing the gas obtained from the first cylinder connection part to a first pressure;
A second pressure reducer for reducing the gas obtained from the second cylinder connection part to a second pressure lower than the first pressure;
A switching valve capable of switching an outflow destination of gas flowing in from the first pressure reducer to a first path and a second path by an external operation;
A third pressure reducer for reducing the pressure of the flowing gas to a third pressure lower than the second pressure in the middle of the second path;
A first merging section for merging the gas obtained from the first path and the gas flowing in from the second path via the third decompressor;
A third path for guiding the gas flowing in from the first merging portion to the second merging portion via the first check valve;
A fourth path for joining the gas flowing in from the second pressure reducer to the second junction through the second check valve;
A fourth pressure reducer that depressurizes the gas flowing in from the second junction to a fourth pressure lower than the third pressure;
A gas supply device comprising: a gas outlet for sending gas obtained from the fourth pressure reducer to the outside.   The gas supply device according to claim 1, further comprising a pressure gauge between the fourth decompressor and the gas outlet. A first pressure switch disposed between the first pressure reducer and the switching valve;
The gas supply device according to claim 1, further comprising a first alarm device that issues an alarm when a pressure detected by the first pressure switch is lower than a certain reference. A second pressure switch disposed in the middle of the fourth path;
The gas supply device according to any one of claims 1 to 3, further comprising a second alarm device that issues an alarm when a pressure detected by the second pressure switch is lower than a certain reference.   A first load sensor for detecting a weight of the first cylinder, wherein the first alarm device issues an alarm when the weight of the first cylinder detected by the first load sensor becomes lighter than a certain reference. The gas supply device according to any one of claims 1 to 3, wherein the gas supply device emits.   A second load sensor for detecting a weight of the second cylinder, wherein the second alarm device issues an alarm when the weight of the second cylinder detected by the second load sensor becomes lighter than a certain reference. The gas supply device according to claim 1, wherein the gas supply device emits the gas.   The gas supply device according to any one of claims 1 to 6, wherein each of the first cylinder and the second cylinder is a cylinder for medical gas. A cylinder holding part for holding the first cylinder and the second cylinder;
The gas supply device according to any one of claims 1 to 7, further comprising a caster capable of integrally moving the cylinder holding part and the gas outlet.   The gas supply device according to claim 1, wherein the gas outlet includes a connector having a shape corresponding to a type of gas.

Images