JP5897860B2 - LP gas supply device - Google Patents

Description

  The present invention relates to an LP gas supply device.

  Conventionally, an LP gas supply device that supplies gas in an LP gas container to a consumer side includes an LP gas container, a high-pressure hose, a pressure regulator, an intermediate gas stopper, a rising pipe, and a gas meter. . In this apparatus, the gas in the LP gas container is supplied to the pressure regulator via the high-pressure hose and depressurized by the pressure regulator. The gas decompressed by the pressure regulator reaches the gas meter via the rising pipe when the intermediate gas plug is opened, and is supplied to the consumer after the flow rate is integrated in the gas meter (see, for example, Patent Document 1).

JP 2002-89827 A

  However, in the LP gas supply device described in Patent Document 1, a high-pressure hose, a pressure regulator, an intermediate gas stopper, a rising pipe, and a gas meter are individually arranged under the restriction of the relative positional relationship. Requires a large facility space. Furthermore, since the service life of these individual equipment is different, replacement of the individual equipment must be performed individually, and the replacement work becomes troublesome.

  The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide an LP gas supply device capable of saving space and reducing the labor of replacement work. It is to provide.

An LP gas supply apparatus according to the present invention includes a connecting pipe type high pressure hose that determines a priority direction of LP gas supply from a plurality of LP gas containers, and a pressure regulator that decompresses LP gas supplied from the connecting pipe type high pressure hose. And a gas meter for integrating and displaying the flow rate of LP gas decompressed by the pressure regulator, and the connecting pipe type high pressure hose, the pressure regulator and the gas meter are integrally held from the back side to form a unit. An attachment member, a connecting pipe type high-pressure hose, the pressure regulator, and a resin cover which is provided on the front side of the gas meter and houses these together with the attachment member, and is housed in the casing. A gas detector that issues an alarm when LP gas of a predetermined concentration or more is detected based on a signal from the sensor unit, and the connecting pipe type high-pressure hose has a cross-sectional circle It is substantially T-shaped in plan view, and is arranged so that the upper side of the T-shape is directed to the back side and the lower end of the T-shape is directed forward, and the attachment member is the connection pipe type high-pressure hose. The rising tip is cut out in a circular shape from the back side, and the circular portion has two standing pieces fitted into the connecting pipe type high pressure hose, and a vent hole formed between the two standing pieces. To do.

  According to this LP gas supply device, since the pressure regulator and the gas meter are integrally held by the mounting member and unitized, the pressure regulator and the gas meter are unitized as compared with the case where the pressure regulator and the gas meter are individually installed. As a result, it does not take up installation space such as rising pipes, and space can be saved. In addition, because it is a unit, when replacing the pressure regulator or gas meter, it is only necessary to replace the entire mounting member. Compared with the case where both are replaced individually, the labor required for replacement is reduced. Can be greatly reduced, saving space and reducing the labor of replacement.

In addition , since the casing is constituted by the mounting member and the resin cover, and the gas detector is housed in the casing, there has been a gas leak from the pressure regulator, the gas meter, or the connecting piping connecting them. Even so, a gas leak can be detected by the gas detector. In particular, since the casing is constituted by the mounting member and the resin cover, the leaked gas is not easily diffused and is easily detected by the gas detector. Thereby, gas leak can be grasped correctly.

  Further, in the LP gas supply device of the present invention, a base, a plurality of legs extending from one side and the other side of the base, and a plurality of legs extending from each of the one side and the other side are provided at the respective distal end sides. The connecting pipe type high pressure hose receives the LP gas from the LP gas container via the high pressure hose and the hose joint, and at the end where the hose joint is connected. It is preferable that a circumferentially extending groove is formed, and at least one of the foot portions is fitted into the groove, and the other foot portion fastens the hose joint.

  In the LP gas supply device of the present invention, a decompression mechanism assembly interposed between the connecting pipe type high pressure hose and the pressure regulator, a base, and a plurality of legs extending from one side and the other side of the base. And a clip member provided with a connecting portion for connecting a plurality of foot portions extending from one side and the other side at each tip side, and a connecting pipe type high pressure hose, a pressure reducing mechanism assembly, and a pressure The adjuster is preferably formed with a circumferentially extending groove, and at least one foot is fitted into the groove.

  Further, in the LP gas supply device of the present invention, a union collar interposed between the pressure regulator and the gas meter, a base, a plurality of legs extending from one side and the other side of the base, and one side And a clip member provided with a connecting portion for connecting a plurality of legs extending from each of the other sides on the tip side, and the pressure regulator is formed with a circumferentially extending groove. It is preferable that at least one foot part is fitted to the union collar, a step part is formed on the union collar, the other leg part is caught by the step part, and the union collar and the gas meter are coupled by nut tightening.

  These LP gas supply devices reduce the possibility of damage over time of piping and equipment due to mistakes such as excessive tightening of screws by construction workers, without using screws at the connection points of piping and equipment. Can be made. In particular, the number of LP gas accidents in recent years has remained at a high level of more than 200 annually, and accidents due to gas leaks at the connection points of LP gas supply devices (joint before and after high pressure hoses, join riser pipes, etc.) It can be said that the ratio of accidents due to gas leaks is reduced.

  ADVANTAGE OF THE INVENTION According to this invention, while aiming at space saving, the LP gas supply apparatus which can reduce the effort of replacement work can be provided.

It is a perspective view which shows the structure of the LP gas supply apparatus which concerns on this embodiment. It is a disassembled perspective view which shows the detail of the LP gas supply apparatus shown in FIG. It is an enlarged view which shows the clip part of the set metal fitting shown in FIG. It is a top view which shows the outline of the connection pipe type high pressure hose shown in FIG. It is an enlarged view which shows the detail of the 1st clip member shown in FIG. It is an enlarged view which shows the detail of the 2nd clip member shown in FIG. It is sectional drawing which shows the connection state of the union collar 57 shown in FIG. It is sectional drawing which shows the detail of the connection structure and internal structure of the pressure-reduction mechanism assembly shown in FIG. FIG. 2 is a first sectional view showing details of the pressure regulator shown in FIG. 1. FIG. 3 is a second sectional view showing details of the pressure regulator shown in FIG. 1. It is a perspective view which shows the structure of the LP gas supply apparatus shown in FIG. 1, Comprising: The perspective view from the back side of the LP gas supply apparatus is shown. It is a figure which shows the relationship between gas concentration and the time after gas leak generation | occurrence | production. It is a figure which shows the operation | movement condition at the time of the normal time and abnormality of a safety valve.

  First, an LP gas supply device according to an embodiment of the present invention will be described. FIG. 1 is a perspective view showing a configuration of an LP gas supply apparatus according to the present embodiment. As shown in FIG. 1, the LP gas supply apparatus 1 generally includes a pressure regulator 10, a gas meter 20, a mounting member 30, a gas detector 40, and a connecting pipe type high-pressure hose (reference numerals in FIG. 2 described later). 52).

  The pressure regulator 10 introduces LP gas from a plurality of LP gas containers, depressurizes this, and supplies it to the gas meter 20. In this embodiment, the pressure regulator 10 is a two-stage pressure-reducing pressure regulator. Note that the pressure regulator 10 may be an automatic switching regulator. The gas meter 20 measures and integrates and displays the flow rate of LP gas used on the consumer side. Further, the gas meter 20 supplies LP gas obtained by integrating the flow rate to the consumer side through the outlet pipe 21. In the present embodiment, the gas meter 20 is, for example, a microcomputer gas meter.

  The attachment member 30 is a unit that holds the pressure regulator 10 and the gas meter 20 together. The mounting member 30 is formed by die cutting, folding, welding, and the like of a metal plate, and has a substantially half-box shape by a substantially L-shaped metal plate and two metal plates serving as side walls. It has become. The gas detector 40 issues an alarm when LP gas having a predetermined concentration or more is detected. When the gas detector 40 detects LP gas having a predetermined concentration or more, the gas detector 40 emits an alarm sound or notifies a gas management center or the like through a communication line or the like.

  Thus, since the pressure regulator 10 and the gas meter 20 are integrally held by the mounting member 30, they are unitized as compared with the case where the pressure regulator 10 and the gas meter 20 are individually installed. As a result, it does not take up installation space such as rising pipes, and space can be saved. Further, since the pressure regulator 10 and the gas meter 20 are replaced, the mounting member 30 may be replaced when replacing the pressure regulator 10 and the gas meter 20. It is reduced. Hereinafter, the configuration of each part will be described in detail.

  FIG. 2 is an exploded perspective view showing details of the LP gas supply device 1 shown in FIG. As shown in FIG. 2, the LP gas supply device 1 includes a plurality of (two) high-pressure hoses 51, a connecting pipe-type high-pressure hose 52, and a set fitting 53 in addition to the above configuration. The high-pressure hose 51 is composed of, for example, a rubber hose that can withstand high pressure, and each is connected to an LP gas container.

  The connecting pipe type high-pressure hose 52 selects one of a plurality (two) of LP gas containers in principle, and the high-pressure gas flowing from the selected LP gas container via the high-pressure hose 51 and the hose joint 51a is downstream. It is what you shed. The connecting pipe type high-pressure hose 52 can maintain the high-pressure gas supply by causing the gas to flow downstream from the LP gas container on the opposite side as the pressure on the selected LP gas container side decreases. The connecting pipe type high pressure hose 52 has a circular cross section and is formed in a substantially T shape when viewed from above, so that the upper side of the T shape faces rearward and the lower end of the T shape faces frontward. Is arranged. Further, the connecting pipe type high pressure hose 52 is configured to introduce a high pressure gas by connecting a hose joint 51a to both ends of the upper side of the T shape, and to discharge the high pressure gas from the lower end portion of the T shape. Yes.

  Further, the mounting member 30 is formed with two standing pieces 31 rising from the rear surface. The two standing pieces 31 are cut out in a substantially circular shape on the front side, and a T-shaped upper side portion of the connecting pipe type high-pressure hose 52 is fitted into the circular portion. Furthermore, the connecting pipe type high pressure hose 52 is formed with two grooves 52a extending circumferentially at both ends of the upper side of the T-shape. In addition, the connecting pipe type high-pressure hose 52 is formed with a single groove 52a extending circumferentially at the lower end of the T-shape.

  The set metal fitting 53 is a metal member composed of a flat plate portion (base portion) 53a and clip portions 53b formed at both ends of the flat plate portion 53a. The clip portion 53b is configured in a substantially semicircular shape, and is configured to bend in a cantilever manner with the flat plate portion 53a as a fulcrum.

FIG. 3 is an enlarged view showing the clip portion 53b of the set fitting 53 shown in FIG. As shown in FIG. 3, the clip portion 53b has two foot portions 53b1 extending from the flat plate portion 53a on both sides of the flat plate portion 53a, and the distal ends of the two foot portions 53b1 are connected portions 53b2. It is connected by. Thus, the clip portion 53b will have a single gap S between the two legs portions 53b1.

  Refer to FIG. 2 again. As shown in FIG. 2, the set fitting 53 is attached to the connecting pipe type high pressure hose 52, and prevents the hose joint 51 a from coming off from the connecting pipe type high pressure hose 52.

  FIG. 4 is a top view schematically showing the connecting pipe type high pressure hose 52 shown in FIG. As shown in FIG. 4, the connecting pipe type high-pressure hose 52 has one groove 52a at each of the T-shaped ends. As described above, the clip portion 53b of the set fitting 53 has the two foot portions 53b1, and one of the two foot portions 53b1 fits into the groove 52a, and the remaining one foot portion 53b1 The hose joint 51a is sandwiched. Thereby, the situation where the high pressure hose 51 comes off from the connecting pipe type high pressure hose 52 is prevented. In particular, when the clip 53b is set in the connecting pipe type high-pressure hose 52, a force is slightly applied in a direction in which both the two foot portions 53b1 are separated, and in the set state, both the two foot portions 53b1 are The connecting pipe type high pressure hose 52 is tightened to return to the original position. Thereby, the situation where the high-pressure hose 51 comes off from the connection pipe type high-pressure hose 52 is further prevented.

  Reference is again made to FIG. As shown in FIG. 2, the connecting pipe type high pressure hose 52 has a screw hole 52b formed at the center of the T-shape, and the set fitting 53 has a through hole 53c formed in the flat plate portion 53a. Further, the connecting pipe type high-pressure hose 52 and the set fitting 53 are fixedly coupled by inserting a screw 54 into the screw hole 52b through the through hole 53c.

  In addition, the LP gas supply device 1 includes a pressure reducing mechanism assembly 55 and a first clip member 56 between the downstream side of the connecting pipe type high pressure hose 52 and the upstream side of the pressure regulator 10.

  The decompression mechanism assembly 55 is a flow path for guiding the high pressure gas from the connecting pipe type high pressure hose 52 to the pressure regulator 10, and has a substantially cylindrical shape as shown in FIG. The decompression mechanism assembly 55 has an enlarged diameter portion having a larger diameter than other portions in the central portion of the cylinder, and a single groove 55a extending in a circumferential shape is formed in the enlarged diameter portion. Further, a single groove 10 a extending in a circumferential shape is formed in the gas inlet channel of the pressure regulator 10.

  The first clip member 56 is a metal member for connecting the connecting pipe type high pressure hose 52, the pressure reducing mechanism assembly 55, and the pressure regulator 10, similarly to the clip portion 53 b of the set fitting 53.

  FIG. 5 is an enlarged view showing details of the first clip member 56 shown in FIG. As shown in FIG. 5, the first clip member 56 has a configuration similar to that of the clip portion 53b of the set fitting 53, and has a base portion 56c having a U-shaped cross section instead of the flat plate portion 53a. Three foot portions 56a extend from the respective distal ends of the U-shape of the base portion 56c, and the distal ends of the three foot portions 56a are connected by a connecting portion 56b. A gap S is formed between each of the three legs 56a.

  Reference is now made to FIG. As shown in FIG. 4, the connecting pipe type high pressure hose 52 has a single groove 52a formed at the lower end of the T-shape, and the pressure reducing mechanism assembly 55 has a single groove 55a formed at the enlarged diameter portion. Further, a single groove 10 a is formed in the gas inlet channel of the pressure regulator 10. Each foot part 56a of the first clip member 56 is adapted to fit into these grooves 52a, 55a, 10a. Thereby, the connection from the connection pipe type high pressure hose 52 to the pressure regulator 10 is maintained. The first clip member 56, like the clip 53b, tightens the connecting pipe type high pressure hose 52 and the like so that both three feet 56a return to the original position. The situation of falling out will be further prevented.

  Refer to FIG. 2 again. As shown in FIG. 2, the pressure regulator 10 introduces high-pressure gas through a connecting pipe type high-pressure hose 52 and a pressure-reducing mechanism assembly 55 provided on the rear side of the LP gas supply device 1 to reduce the pressure. LP gas is supplied to the gas meter 20 from the gas outlet channel located below. In the gas outlet channel of the pressure regulator 10, a single groove 10b is formed in a circumferential shape.

  Here, the LP gas supply device 1 includes a union collar 57 and a second clip member 58 between the pressure regulator 10 and the gas meter 20. The union collar 57 is a substantially cylindrical member and has a function as a connection part between the pressure regulator 10 and the gas meter 20. Moreover, the union brim 57 is formed with a first enlarged-diameter portion 57a and a second enlarged-diameter portion 57b that are larger in diameter than other portions.

  The second clip member 58 is a member similar to the first clip member 56 and has a structure in which the number of legs is different from that of the first clip member 56. FIG. 6 is an enlarged view showing details of the first clip member 56 shown in FIG. As shown in FIG. 6, the second clip member 58 has a configuration similar to that of the clip portion 53b of the set fitting 53, and has a base portion 58c having a U-shaped cross section instead of the flat plate portion 53a. Two foot portions 58a extend from the respective distal ends of the U-shaped base portion 58c, and the distal ends of the two foot portions 58a are connected by a connecting portion 58b. A gap S is formed between the two legs 58a.

  Reference is again made to FIG. As described above, one groove 10 b is formed in the circumferential shape in the gas outlet flow path of the pressure regulator 10. Moreover, the union brim 57 has the 1st enlarged diameter part 57a. The foot part 58a of the second clip member 58 is fitted into the groove 10b of the gas outlet channel, and is hooked on the first enlarged diameter part 57a. Thereby, the coupling | bonding of the pressure regulator 10 and the union collar 57 will be maintained. The second clip member 58, like the clip 53b, tightens the union flange 57 and the like so that both the two foot portions 58a return to the original position, thereby further preventing the union flange 57 from coming off. Will be.

  Specifically, the union collar 57 is coupled to the pressure regulator 10 and the gas meter 20 as follows. FIG. 7 is a cross-sectional view showing a connection state of the union flange 57 shown in FIG. As shown in FIG. 7, on the pressure regulator 10 side of the union collar 57, there are two grooves 57c extending in a circumferential shape, and an O-ring 59 made of an elastic member is provided in these two grooves 57c. It is inserted. Here, the purpose of providing two grooves 57c and providing two O-rings 59 is to ensure the structural redundancy and to use the O-rings 59 according to the purpose. Since the O-ring 59 fitted in the upper direction in FIG. 7 contacts the LP gas, the O-ring 59 fitted in the lower direction in FIG. In this case, the weather resistance is good, and even if gas leakage from the upper O-ring 59 occurs, confidentiality can be maintained by the lower O-ring 59. As a result, the O-ring 59 made of an elastic member is in close contact with the inner wall of the gas outlet channel of the pressure regulator 10 to maintain airtightness.

  On the other hand, the union flange 57 and the gas meter 20 are connected as follows. First, the union collar 57 and the gas meter 20 are connected by a nut member 60. Further, a rubber packing 61 is interposed between the second enlarged diameter portion 57b of the union flange 57 and the gas inlet channel of the gas meter 20, so that airtightness is maintained. Further, the nut member 60 has a recess 60a on the inner surface, and the second enlarged diameter portion 57b and the rubber packing 61 are fitted into the recess 60a. As a result, the union collar 57 is prevented from coming off from the gas meter 20, and the airtightness is maintained.

  In addition, although illustration is abbreviate | omitted in FIG. 2, also about the gas outlet flow path of the gas meter 20, with the structure similar to the downward side (gas meter 20 side) of the union collar 57, while maintaining airtightness, piping omission is prevented. Has been.

  Here, the connection structure and internal structure of the pressure reducing mechanism assembly 55 will be described in detail. FIG. 8 is a cross-sectional view showing details of the connection structure and internal structure of the pressure reducing mechanism assembly 55 shown in FIG.

  As described above, the pressure reducing mechanism assembly 55 has the groove 55a, and this groove 55a is fastened by the first clip member 56 together with the groove 52a of the connecting pipe type high pressure hose 52 and the groove 10a of the pressure regulator 10 to prevent the removal. Has been.

  As shown in FIG. 8, the pressure reducing mechanism assembly 55 has two grooves 55b extending circumferentially on the rear side, and an O-ring 62 made of an elastic member is fitted in the grooves 55b. As a result, the O-ring 62 made of an elastic member is brought into close contact with the inner peripheral wall of the connecting pipe type high-pressure hose 52 so that airtightness is maintained.

  Similarly, the pressure reducing mechanism assembly 55 has two grooves 55c extending circumferentially on the front side, and an O-ring 63 made of an elastic member is fitted into the grooves 55c. As a result, the O-ring 63 made of an elastic member is kept in close contact with the inner peripheral wall of the gas inlet channel of the pressure regulator 10 so that airtightness is maintained. Here, the purpose of providing two grooves 55b and 55c and two O-rings 62 and 63, respectively, is to use an O-ring according to the meaning and purpose of securing structural redundancy as described above. is there. The O-rings 62 and 63 fitted in the outer direction in FIG. 8 are preferentially used with a member having good oil resistance and less permanent distortion because they are in contact with LP gas, and the O-rings 62 and 63 fitted in the inner direction in FIG. Since the possibility of contact with outside air is high, the weather resistance is good, and even if gas leakage from the outer O-ring occurs, the inner O-ring can be kept airtight.

  Further, the pressure reducing mechanism assembly 55 includes a valve restraining spring 55d, an intermediate pressure valve assembly 55e, an intermediate pressure case 55f, and an operating rod 55g. The valve restraining spring 55d is a spring that biases the intermediate pressure valve assembly 55 forward from the rear side of the pressure reducing mechanism assembly 55. The intermediate pressure valve assembly 55e has an elastic member 55e1 at the front, and is in close contact with the intermediate pressure case 55f provided at the front by being urged by a valve restraining spring 55d from the rear.

  The intermediate pressure case 55f is a substantially cylindrical member disposed inside the decompression mechanism assembly 55, and is disposed in close contact with the inner peripheral wall of the decompression mechanism assembly 55 by an O-ring 55f1 in the same manner as other portions. . In this case, the purpose of providing two O-rings 55f1 is only to ensure structural redundancy. The operation rod 55g is a rod-shaped member having one end connected to the intermediate pressure valve assembly 55e and the other end disposed in the pressure regulator 10.

  Here, the pressure regulator 10 pushes the operating rod 55g backward when the internal pressure decreases. The operation rod 55g moves the intermediate pressure valve assembly 55e rearward against the urging force of the valve restraining spring 55d. For this reason, the high pressure gas from the connecting pipe type high pressure hose 52 is introduced into the pressure regulator 10 via the pressure reducing mechanism assembly 55 every time the internal pressure of the pressure regulator 10 decreases.

  Next, the internal structure of the pressure regulator 10 will be described. FIG. 9 is a first sectional view showing details of the pressure regulator 10 shown in FIG. 1, and FIG. 10 is a second sectional view showing details of the pressure regulator 10 shown in FIG. 9 shows a cross section when the pressure regulator 10 is cut in the front-rear direction so as to pass through the pressure reducing mechanism assembly 52, and FIG. 10 shows a cross section when the pressure regulator 10 is cut in the left-right direction. ing.

  As shown in FIGS. 9 and 10, the pressure regulator 10 includes a lower housing 11 and an upper housing 12, and these are assembled to form a housing. In the lower housing 11, a gas inlet channel 11a and a gas outlet channel 11b are formed. The gas inlet channel 11 a is a channel that is connected to the decompression mechanism assembly 55 and introduces high-pressure gas from the decompression mechanism assembly 55. The gas outlet channel 11 b is a channel that is formed in a direction orthogonal to the gas inlet channel 11 a and supplies fuel gas decompressed by the pressure regulator 10 to, for example, the gas meter 20.

  The pressure regulator 1 includes an intermediate pressure decompression unit 13 that decompresses, for example, a high-pressure gas of 0.1 to 1.56 MPa introduced from the gas inlet channel 11a to about 0.06 MPa, and 2.55 to And a low-pressure decompression unit 14 that decompresses to about 3.3 kPa.

  The intermediate pressure reducing unit 13 includes an intermediate pressure reducing chamber 13a, an atmospheric pressure chamber 13b, an intermediate pressure spring 13c, an intermediate pressure diaphragm receiving plate 13d, an intermediate pressure diaphragm 13e, a bearing member 13f, and a shaft core part 13g. It has.

  The intermediate pressure decompression chamber 13a is a portion that is formed between the lower housing 11 and the upper housing 12, and temporarily holds the high-pressure gas introduced from the gas inlet channel 11a. The atmospheric pressure chamber 13b is a portion where the inside becomes an atmospheric pressure by communicating with the outside. 9 and 10, illustration of communication with the outside of the atmospheric pressure chamber 13b is omitted.

  The intermediate pressure diaphragm 13e has a peripheral edge sandwiched and fixed between the lower housing 11 and the upper housing 12, and airtightly separates the intermediate pressure decompression chamber 13a and the atmospheric pressure chamber 13b. Further, the intermediate pressure diaphragm 13e is urged toward the intermediate pressure decompression chamber 13a side by the intermediate pressure spring 13c through the intermediate pressure diaphragm receiving plate 13d.

  The bearing member 13f is coaxially fixed to the axial center portion of the intermediate pressure diaphragm 13e. The shaft portion 13g is a member inserted into the bearing member 13f, and moves in the axial direction together with the intermediate pressure diaphragm 13e as the gas pressure in the intermediate pressure decompression chamber 13a varies.

  Further, the intermediate pressure reducing unit 13 includes a gas introduction control rod 13h and a drain reservoir structure 13i. The gas introduction control rod 13h has one end in contact with the tip of the shaft portion 13g and the other end in contact with the tip of the operating rod 55g. More specifically, the gas introduction control rod 13h is a substantially L-shaped metal member, and has a structure that rotates around an L-shaped folded portion.

  For this reason, when the pressure in the intermediate pressure decompression chamber 13a becomes low, the intermediate pressure diaphragm 13e moves to the intermediate pressure decompression chamber 13a side by the biasing force of the intermediate pressure spring 13c. As a result, the gas introduction control rod 13h rotates counterclockwise in FIG. 9 to push the operating rod 55g toward the pressure reducing mechanism assembly 55, and the high pressure gas from the pressure reducing mechanism assembly 55 flows into the pressure regulator 10. It will be.

  Further, when the high pressure gas flows from the decompression mechanism assembly 55, the pressure in the intermediate pressure decompression chamber 13a increases. As a result, the intermediate pressure diaphragm 13e moves toward the atmospheric pressure chamber 13b against the urging force of the intermediate pressure spring 13c. At this time, the gas introduction control rod 13h rotates clockwise in FIG. 9, and the operation rod 55g moves to the left in the drawing. Therefore, inflow of high-pressure gas is controlled to the pressure regulator 10.

  The low-pressure decompression unit 14 includes a low-pressure decompression chamber 14a, an atmospheric pressure chamber 14b, a low-pressure spring 14c, a low-pressure diaphragm receiving plate 14d, a low-pressure diaphragm 14e, an operating rod 14f, a spring receiving washer 14g, and a safety valve adjustment. A spring 14h, an opening / closing lever 14i, a pin 14j, a low pressure valve 14k, a nozzle part 141, a valve body 14m of a safety valve, and a vent hole 14n are provided.

  The low-pressure decompression chamber 14 a is a portion that is formed between the lower housing 11 and the upper housing 12 and temporarily holds the medium-pressure gas introduced from the medium-pressure decompression unit 13. The atmospheric pressure chamber 14b is a part where the inside becomes an atmospheric pressure by communicating with the outside.

  The periphery of the low pressure diaphragm 14e is sandwiched and fixed between the lower housing 11 and the upper housing 12, and the low pressure decompression chamber 14a and the atmospheric pressure chamber 14b are hermetically separated. The low-pressure diaphragm 14e is urged toward the low-pressure decompression chamber 14a by a low-pressure spring 14c through a low-pressure diaphragm receiving plate 14d.

  The operating rod 14f is a member provided in the axial direction through the center of the low-pressure diaphragm 14e, and an opening / closing lever 14i is provided at the tip of the low-pressure decompression chamber 14a side. A pin 14j is provided at the tip of the opening / closing lever 14i (the tip on the opposite side of the operating rod 14f). For this reason, the opening / closing lever 14i is rotatable about the pin 14j.

  Here, in the low-pressure depressurizing unit 14, the gas in the low-pressure depressurizing chamber 14a is depressurized by using gas on the consumer side. Thereby, the low pressure diaphragm 14e is displaced to the lower housing 11 side by the biasing force of the low pressure spring 14c. Then, the opening / closing lever 14i rotates counterclockwise in the figure with the pin 14j as a fulcrum. By this rotation, the low-pressure valve 14k moves in the right direction in the figure and opens the low-pressure nozzle 14l. As a result, the gas on the intermediate pressure decompression chamber 14a side flows to the gas outlet channel 11b side.

  On the other hand, when the pressure in the low pressure decompression chamber 14a rises, the low pressure diaphragm 14e is displaced toward the upper housing 12 against the biasing force of the low pressure spring 14c, and the low pressure valve 14k moves to the left in the drawing. Thereby, the flow path of the low pressure nozzle 14l is closed, and the inflow of gas into the low pressure decompression chamber 14a is controlled. Thereafter, when gas is used on the consumer side, the pressure in the low-pressure decompression chamber 14a is reduced, and the above operation is repeated.

  When the pressure in the low-pressure decompression chamber 14a exceeds a predetermined pressure and becomes abnormally high, further movement of the low-pressure diaphragm 14e is blocked by the safety valve adjusting spring 14h, and the valve body 14m of the safety valve opens, The gas in the decompression chamber 14a is released to the outside through the atmospheric pressure chamber 14b and the vent hole 14n.

  Refer to FIG. 2 again. As shown in FIG. 2, the attachment member 30 has four attachment holes 32 formed at the end of a substantially L-shaped metal plate. By attaching the attachment member 30 to the wall surface with a bolt or the like through the attachment hole 32, the LP gas supply device 1 is installed on the wall surface or the like.

  Further, the attachment member 30 can be inserted with a screw 59 from the lower side of the substantially L-shaped metal plate, and the gas meter 20 is fixed to the attachment member 30 by tightening the screw 59.

  FIG. 11 is a perspective view showing the configuration of the LP gas supply device 1 shown in FIG. 1, and shows a perspective view from the rear side of the LP gas supply device 1. As shown in FIG. 11, the LP gas supply device 1 includes a resin cover 70. The resin cover 70 includes a substantially L-shaped resin plate that covers the front surface of the LP gas supply device 1 and a planar substantially J-shaped resin plate provided on both sides of the substantially L-shaped resin plate. The screw 71 is screwed to the attachment member 30. For this reason, the resin cover 70 has a role of a casing that houses the pressure regulator 10 and the gas meter 20 together with the mounting member 30.

  Here, the gas detector 40 is accommodated in a casing constituted by the attachment member 30 and the resin cover 70. For this reason, even if a gas leak has occurred from the pressure regulator 10, the gas meter 20, or a connecting pipe connecting them, the gas detector 40 can detect the gas leak. In particular, since the casing is constituted by the mounting member 30 and the resin cover 70, the leaked gas is not easily diffused and is easily detected by the gas detector 40.

  Two vent holes 33 are formed on the rear surface of the mounting member 30. Further, the attachment member 30 and the resin cover 70 form the vent holes 34 on both side surfaces of the LP gas supply device 1. For this reason, when a gas leak occurs in the LP gas supply device 1 or LP gas flows out through the vent hole 14n of the pressure regulator 10, the gas is discharged to the outside through the vent holes 33 and 34. Will be. As a result, the leaked gas is not continuously enclosed in the casing, but is discharged to the outside after the detection by the gas detector 40, and the gas detector 40 detects the gas leak even after the improvement of the gas leak abnormality. This will prevent the situation.

  The reason why the gas detector 40 is attached to the upper part of the LP gas supply device 1 in FIG. 1 is that internal convection occurs at the time of gas leakage, and LP gas tends to flow through the upper part of the LP gas supply device 1. .

  Next, the function of the gas detector 40 will be described. The gas detector 40 shown in FIG. 1 issues an alarm when LP gas having a predetermined concentration or more is detected. At this time, the sensor part of the gas detector 40 will break down if exposed to an excessively high concentration of LP gas. FIG. 12 is a diagram showing the relationship between the gas concentration and the time from the occurrence of gas leakage.

  Even when the same amount of gas leaks, the ventilation rate varies depending on the size of the vent holes 33 and 34. As shown in FIG. 12, when the ventilation rate is low, the gas in the LP gas supply device 1 Concentration increases greatly. For this reason, there may be a gas concentration far exceeding the threshold at which the gas detector 40 issues an alarm.

  Therefore, in this embodiment, the gas detector 40 energizes the sensor unit intermittently so that the sensor unit does not fail even with abnormally-concentrated LP gas. Specifically, the gas detector 40 is energized for 1 second at intervals of 10 seconds to prevent failure of the sensor unit. In addition, energy can be saved by intermittent energization. Note that when the gas concentration at which the gas detector 40 issues an alarm is 4500 ppm, an alarm can be issued if energization is performed for about 45 milliseconds when a gas leak occurs from the experimental results. Therefore, the energization time is not limited to 1 second and may be 45 milliseconds or more and 1 second or less.

  If the vent holes 33 and 34 are too large, as shown in FIG. 12, the gas concentration may not exceed the threshold value at the time of gas leakage, so the vent holes 33 and 34 need to be appropriately sized. There is.

  Furthermore, the above-described pressure regulator 10 transmits the operation state of the safety valve to the gas detector 40, and the gas detector 40 issues an alarm when the operation of the safety valve is abnormal. The operating status of the safety valve is, for example, by providing a position sensor inside the pressure regulator 10 to detect the position of the safety valve, or by providing a gas sensor in the vent hole 14n to detect the gas discharge status by the safety valve. To be judged. Further, the operating state of the safety valve may be detected by other methods.

  FIG. 13 is a diagram illustrating an operation state when the safety valve is normal and abnormal. As shown in FIG. 13, when the pressure in the low pressure decompression chamber 14a reaches or exceeds the operating pressure, the safety valve operates to release the LP gas in the low pressure decompression chamber 14a to the outside. Here, normally, the LP gas is discharged to the outside, so that the pressure in the low-pressure decompression chamber 14a becomes less than the operating pressure. For this reason, the opening time of the safety valve is less than the normal operation time shown in FIG.

  However, when a foreign object is caught in the safety valve or a gas pressure abnormality occurs due to reliquefaction in the high-pressure unit and the regulator, the opening time of the safety valve exceeds the normal operation time. Therefore, when the opening time of the safety valve becomes three times or more of the normal operation time, the gas detector 40 determines that the safety valve is operating abnormally and issues an alarm. The reason for the triple is that it is appropriate as the shortest time that does not cause false alarms.

  Next, the state of replacement work of the LP gas supply apparatus 1 according to the present embodiment will be described. First, conventionally, a high-pressure hose, a pressure regulator, an intermediate gas stopper, a rising pipe, and a gas meter have been individually arranged. For this reason, the worker has exchanged each device / part when performing the exchange work.

  On the other hand, in the LP gas supply device 1 according to the present embodiment, the worker removes, for example, a bolt inserted into the wall surface or the like via the attachment hole 32 and replaces the LP gas supply device 1 together with the attachment member 30. Will be. For this reason, compared with individual exchange, the labor of exchange work is remarkably reduced.

  In particular, the conventional LP gas supply device performs inspections such as failure and breakage, and performs replacement work when a failure or breakage occurs. The LP gas supply device 1 according to the present embodiment is Since the gas detector 40 is provided inside, the LP gas supply device 1 itself determines a failure or the like, and the labor related to the inspection can be reduced.

  Thus, according to the LP gas supply device 1 according to the present embodiment, the pressure regulator 10 and the gas meter 20 are integrally held by the mounting member 30 and unitized. Compared with the case where the gas meter 20 is individually installed, the space is saved without taking up space because the unit is unitized. Further, since the pressure regulator 10 and the gas meter 20 are replaced, the mounting member 30 may be replaced when replacing the pressure regulator 10 and the gas meter 20. It is reduced. Therefore, it is possible to save space and reduce the labor of replacement work.

  Moreover, since the casing is comprised by the attachment member 30 and the resin cover 70, and the gas detector 40 is accommodated in the casing, gas leaks from the pressure regulator 10, the gas meter 20, or the connection piping connecting these. Even if this occurs, the gas detector 40 can detect a gas leak. In particular, since the casing is constituted by the mounting member 30 and the resin cover 70, the leaked gas is not easily diffused and is easily detected by the gas detector 40. Thereby, gas leak can be grasped correctly.

  Moreover, without using a screw at the connection location of piping, equipment, etc., the possibility of damage over time of piping, equipment, etc. due to mistakes such as excessive screw tightening by the construction worker can be reduced. In particular, the number of LP gas accidents in recent years has remained at a high level of more than 200 annually, and accidents due to gas leaks at the connection points of LP gas supply devices (joint before and after high pressure hoses, join riser pipes, etc.) It can be said that the ratio of accidents due to gas leaks is reduced.

  As described above, the present invention has been described based on the embodiment, but the present invention is not limited to the above embodiment, and may be modified without departing from the gist of the present invention.

  For example, the number of grooves and the number of feet are not limited to the above and can be changed as appropriate. Various shapes and dimensions are not limited to those shown in the drawings, and can be changed as appropriate.

  Moreover, in this embodiment, although the LP gas supply apparatus 1 has the gas detector 40 inside, not only this but the gas detector 40 does not need to be provided. This is also because space can be saved and the labor of replacement work can be reduced. In particular, the casing is constituted by the mounting member 30 and the resin cover 70 so that it is difficult to be exposed to wind and rain, and the pressure regulator 10 and the gas meter 20 can be protected.

DESCRIPTION OF SYMBOLS 1 LP gas supply apparatus 10 Pressure regulator 10a, 10b Groove 11 Lower housing 11a Gas inlet flow path 11b Gas outlet flow path 12 Upper housing 13 Medium pressure pressure reduction part 13a Medium pressure pressure reduction chamber 13b Atmospheric pressure room 13c Medium pressure spring 13d Medium pressure Diaphragm receiving plate 13e Medium pressure diaphragm 13f Bearing member 13g Shaft core portion 13h Gas introduction control rod 13i Drain pool structure 14 Low pressure reducing portion 14a Low pressure reducing chamber 14b Atmospheric pressure chamber 14c Low pressure spring 14d Low pressure diaphragm receiving plate 14e Low pressure diaphragm 14f Actuating rod 14g Spring washer 14h Safety valve adjustment spring 14i Open / close lever 14j Pin 14k Low pressure valve 14l Nozzle part 14m Safety valve disc 14n Ventilation hole 20 Gas meter 21 Outlet piping 30 Mounting member 31 Standing piece 32 Mounting hole 33 34 vent holes 40 gas detector 51 high-pressure hose 52 connected tube type high pressure hose 52a groove 52b screw holes 53 set bracket 53a flat portion (base portion)
53b clip part 53b1 foot part 53b2 connecting part 53c through hole 54 screw 55 pressure reducing mechanism assembly 55a to 55c groove 55d valve restraining spring 55e intermediate pressure valve assembly 55e1 elastic member 55f intermediate pressure case 55f1 O-ring 55g operating rod 56 clip member 56a foot part 56b Connecting part 56c Base part 57 Union flange 57a First enlarged part 57b and second enlarged part 57c Groove 58 Clip member 58a Foot part 58b Connecting part 58c Base part 59 O-ring 60 Nut member 60a Recess 61 Rubber packing 62, 63 O-ring 70 Resin cover 71 Screw S Air gap

Claims (5)

A connecting pipe type high-pressure hose for discriminating the priority direction of LP gas supply from a plurality of LP gas containers;
A pressure regulator for depressurizing LP gas supplied from the connecting pipe type high pressure hose;
A gas meter for integrating and displaying the flow rate of LP gas decompressed by the pressure regulator;
An attachment member that unitizes the connecting pipe type high-pressure hose, the pressure regulator, and the gas meter from the back side thereof ;
A resin cover which is provided on the front side of the connecting pipe type high-pressure hose, the pressure regulator and the gas meter and houses them together with the mounting member to form a casing;
A gas detector which is housed in the casing and issues an alarm when LP gas having a predetermined concentration or more is detected based on a signal from the sensor unit,
The connecting pipe type high-pressure hose has a circular cross section and is substantially T-shaped in plan view, and is arranged so that the upper side of the T-shape faces the back side and the lower end of the T-shape faces the front,
The attachment member has a leading end cut out in a circular shape from the back side of the connecting pipe type high pressure hose, and this circular portion is formed between the two standing pieces that fit into the connecting pipe type high pressure hose and the two standing pieces. LP gas supply device, characterized in that it comprises a vent hole that is, a. The LP gas supply device according to claim 1, wherein the gas detector intermittently energizes the sensor unit. A clip part comprising a base, a plurality of legs extending from one side and the other side of the base, and a connecting part for connecting a plurality of legs extending from the one side and the other side at the respective distal ends. Further comprising
The connecting pipe type high-pressure hose receives LP gas from the LP gas container via a high-pressure hose and a hose joint, and a groove extending circumferentially is formed at an end to which the hose joint is connected. at least one with fits, LP gas supply device according to claim 1 or claim 2 other of said leg portions, characterized in that the tightening the hose coupling of the foot. A pressure reducing mechanism assembly interposed between the connecting pipe type high pressure hose and the pressure regulator;
A clip member comprising a base, a plurality of legs extending from one side and the other side of the base, and a connecting part for connecting a plurality of legs extending from each of the one side and the other side at the respective distal ends. And further comprising
The connecting pipe type high-pressure hose, the pressure-reducing mechanism assembly, and the pressure regulator are each formed with a circumferentially extending groove, and at least one foot portion is fitted into the groove. Or the LP gas supply apparatus in any one of Claim 2 . A union brim interposed between the pressure regulator and the gas meter;
A clip member comprising a base, a plurality of legs extending from one side and the other side of the base, and a connecting part for connecting a plurality of legs extending from each of the one side and the other side at the respective distal ends. And further comprising
The pressure regulator is formed with a circumferentially extending groove, and at least one of the feet fits into the groove,
The union brim is formed with a stepped portion, and the other foot is caught by the stepped portion,
LP gas supply device according to claim 1 or claim 2, characterized in that it is coupled by a nut tightening said union flange with gas meter.