JP2016145600A - Connecting member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting member capable of connecting equipment with sealability and assemblability, without angle deviation.SOLUTION: A connection member for connecting primary side equipment and secondary side equipment each including a flange connection surface having an opening part, includes a cylindrical first insertion part 10 inserted into the opening part of the primary side equipment, and a cylindrical second insertion part 20 arranged coaxially with the first insertion part, and inserted into the opening part of the secondary side equipment. The first insertion part has at least one seal member around an axis, and the second insertion part has a thread 21 engaged to a screw groove provided in the opening part of the secondary side equipment.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a joining member for connecting two or more devices, and more particularly to a joining member for connecting a pressure regulator.

  The pressure regulator depressurizes high-pressure gas to a predetermined pressure. Speaking familiarly, pressure regulators that depressurize high pressure cylinder LP gas (liquid petrolium gas) to a pressure that can be used in household gas cooking utensils are widely used.

  A pressure regulator generally adjusts the pressure by a mechanical structure using a diaphragm or the like, and the outlet pressure (adjusted pressure) also varies when the inlet pressure (source pressure) varies due to structural limitations. . Therefore, a two-stage pressure regulator in which two stages of pressure regulators are arranged in series is known in order to suppress fluctuations in the regulation pressure (Patent Document 1).

  For connecting two pressure regulators, a method using a joining member called a nipple has been the mainstream. This nipple has a hollow cylindrical shape, and is formed with threads on both sides, and each thread is formed with a thread groove formed in the opening of the primary pressure regulator and a secondary pressure regulator. Engage with and connect to the thread groove formed in the opening of the.

  FIG. 7 is a diagram for explaining two pressure regulators 30 and 40 connected using a nipple 70. In general, the thread groove of the nipple has a tapered shape with a diameter that decreases toward the tip, and is tightly coupled to each pressure regulator as the screw is tightened, thus ensuring a sealing property. .

JP 2006-053727 A

  In the connection of the pressure regulator, the tightness of the connection is important. When the gas tightness (air tightness) is lowered, gas leakage occurs, which causes a safety problem when handling a gas toxic to the human body. In addition, when the sealing property (liquid tightness) of the liquid that stops the entry of water from the outside is low, moisture enters from the outside, and the airtightness and durability of the device are affected by corrosion and the like. In particular, since the pressure regulator for LP gas and the like are often installed outdoors, the entry of moisture becomes a more serious problem.

  However, in the connection using the nipple described above, a taper screw is used. It was a cause of shrinking. In addition, since the screws are tightened by twisting each pressure regulator itself, it takes time and effort to assemble, and further, the two pressure regulators are assembled with angular deviation. There was also a risk of being.

The joining member according to the present invention is
A joining member for connecting a primary side device and a secondary side device each having a flange connection surface having an opening,
A cylindrical first insertion portion inserted into the opening of the primary device;
A cylindrical second insertion portion that is coaxial with the first insertion portion and is inserted into the opening of the secondary device,
The first insertion portion has at least one seal member around an axis;
The second insertion portion has a thread that engages with a thread groove provided in an opening of the secondary device.

  According to such a configuration, it is possible to connect devices without angular deviation and with good assembling and sealing properties.

  In addition, “sealability” in this specification means airtightness and liquid tightness, and prevents the target gas and liquid from leaking from the inside (seal part) to the outside, and entering the inside from the outside. It shall mean the performance to prevent.

  In the above configuration, the first insertion portion has two seal members, the distal end side of the first insertion portion is an airtight seal member, and the other is a liquid-tight seal member. Also good.

  According to such a configuration, high liquid tightness and air tightness can be realized by arranging seal members having different characteristics at appropriate locations.

  In the above configuration, the second insertion portion may include a circular contact portion formed around the axis of the distal end surface.

  According to such a configuration, the second insertion portion comes into contact with the inside of the secondary device at the contact portion, and the gas pressure can be controlled at the location.

  Further, in the above configuration, the contact portion may have a shape with a sharp tip in an axial cross-sectional shape.

  According to such a configuration, the sealing performance at the contact portion can be made better.

  Further, in the above configuration, the screw may be a straight type.

  According to such a configuration, it is possible to prevent deterioration of the sealing performance due to the loosening of the screw as compared with the taper type.

  In the above configuration, the first insertion portion may include a protruding portion that is adjacent to the second insertion portion and protrudes in the axial direction in a predetermined section in the axial direction.

  According to such a configuration, when the second insertion portion is inserted into the opening of the secondary device, the projecting portion abuts on the flange connection surface of the secondary device, and thereby the inside of the opening. It is possible to accurately manage the length of the second insertion portion inserted into the.

  As described above, by connecting devices using the joining member according to the present invention, it is possible to connect devices without angular misalignment and with good assembling and sealing properties.

It is the figure which looked at the joining member concerning a 1st embodiment from the front. It is the figure which looked at the joining member concerning a 1st embodiment from (a) the left direction, and (b) the figure seen from the right direction. It is AA sectional drawing in Fig.2 (a). It is explanatory drawing of the primary side apparatus connected by the joining member concerning 1st Embodiment. It is explanatory drawing of the secondary side apparatus connected by the joining member concerning 1st Embodiment. It is explanatory drawing of the pressure regulator connected by the joining member concerning 1st Embodiment. It is explanatory drawing of the pressure regulator connected using the nipple. It is explanatory drawing of the pressure regulator connected by the general flange connection.

  Hereinafter, the joining member according to the present embodiment will be described in detail. However, all of these embodiments are illustrative and do not give a limited interpretation of the present invention. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

(First embodiment)
Drawing 1 is a figure which looked at the connecting member concerning a 1st embodiment from the front.

  The joining member 1 includes a first insertion portion 10 and a second insertion portion 20 that are each formed in a cylindrical shape on the same axis. The first insertion part 10 has two grooves 11a and 11b for the seal member on the surface around the axis, and these are arranged in parallel to the axial direction. Further, the first insertion portion 10 has a protruding portion 12 that is adjacent to the second insertion portion 20 and protrudes in the axial direction in a predetermined section in the axial direction. The second insertion portion 20 includes a screw thread 21 formed on the surface around the axis, and a seal member groove 22 formed on the surface around the axis.

  A general O-ring-shaped seal member can be fitted in the grooves 11a, 11b, and 22 for the seal member. Depending on the application, a seal member having a specialized function such as liquid-tight or air-tight can be used. Furthermore, these seal members can be appropriately arranged and used in combination.

  FIG. 2A is a view of the joining member 1 viewed from the left direction, and FIG. 2B is a view of the joining member 1 viewed from the right direction. Moreover, FIG. 3 is AA sectional drawing of the joining member 1 in Fig.2 (a). As shown in FIG. 3, the joining member 1 includes a hollow portion 2 inside. Thereby, each opening part of the primary side apparatus 30 (FIG. 4) and the secondary side apparatus 40 (FIG. 5) communicates via the hollow part 2 of the joining member 1 shown in FIG. Is possible.

  Moreover, the 2nd insertion part 20 of the joining member 1 is provided with the circular contact part 23 formed around the axis | shaft of the front end surface. The contact portion 23 is also referred to as a nozzle, and has a shape with a pointed end in an axial cross-sectional shape. Moreover, the 2nd insertion part 20 of the joining member 1 is further equipped with the hollow part 24 in the outer periphery of the contact part 23 of the front end surface.

  As the material of the joining member 1, brass or the like can be used, and the joining member 1 can be manufactured by machining or the like.

(Use state)
Next, the use state of the joining member 1 concerning this embodiment is demonstrated.

  The joint member 1 according to the present embodiment is used as a joint for connecting the primary side device 30 and the secondary side device 40, and thus the device can be connected with good assembling property and sealing property. In the present embodiment, both the primary side device 30 and the secondary side device 40 are pressure regulators, and further, the primary side device 40 is a primary side pressure regulator, and the secondary side device 40 is 2 It is a secondary pressure regulator. Thus, by making a pressure regulator into a two-stage type, the fluctuation | variation of the adjustment pressure with respect to the fluctuation | variation of the original pressure can be suppressed compared with a one-stage type pressure regulator. The joining member 1 according to the present embodiment also has a function as a nozzle that appropriately transmits the pressure of the input gas to the pressure adjusting member of the secondary pressure regulator 40.

  In this embodiment, the primary side device 30 and the secondary side device 40 are both diaphragm type pressure regulators, but the pressure regulator connected by the joining member 1 according to this embodiment is a diaphragm type pressure regulator. The present invention is not limited to this, and can be applied to devices other than the pressure regulator.

  FIG. 4 is an explanatory diagram of the primary side device (primary side pressure regulator) 30, and FIG. 5 is an explanatory diagram of the secondary side device (secondary side pressure regulator) 40. As shown in FIG. 4, the primary device 30 includes a flange connection surface 31, and the flange connection surface 31 has an opening 32. As shown in FIG. 5, the secondary device 40 includes a flange connection surface 41, the flange connection surface 41 has an opening 42, and a screw groove 43 is formed inside the opening 42. .

  Here, the structure of the diaphragm pressure regulator will be briefly described with reference to FIG. When the gas is not used, the gas flowing into the pressure regulator is sealed in a rubber member called a valve rubber 51. In general, the gas is supplied by a hollow cylindrical member (hereinafter referred to as “gas supply member”), and this member is pressed against the valve rubber 51 when the gas is not used. Yes.

  The valve rubber 51 is provided at the tip of the valve body 52, and the valve body 52 is interlocked with the interlock member 54 via the arm 53.

  The interlock 54 is connected to the diaphragm 55. The diaphragm 55 is a rubber member for adjusting the outlet pressure, and is coupled to a pressure receiving plate 56 that is a metal or resin plate member. The diaphragm 55 and the pressure receiving plate 56 are urged downward in the drawing by a pressure adjusting spring 57a, and the diaphragm 55 and the pressure receiving plate 56 are displaced in the vertical direction of the drawing in accordance with the outlet pressure of the pressure regulator.

  When the gas is used, the elastic force of the pressure adjusting spring 57a interlocking with the diaphragm 55 and the pressure receiving plate 56 is transmitted to the valve rubber 51 through the interlocking element 54, the arm 53, etc., and the valve rubber 51 is displaced in the horizontal direction of the drawing. The clearance between the valve rubber 51 and the gas supply member increases and decreases, and the amount of gas supplied to the outlet side changes, whereby the outlet pressure is adjusted.

  When the gas is used, for example, when the outlet pressure decreases, a downward force is applied to the diaphragm 55 and the pressure receiving plate 56 urged by the pressure adjusting spring 57a. The direction of this force is changed by the interlock 54 and the arm 53, and the valve rubber 51 attached to the tip of the valve body 52 moves to the right in the drawing. As a result, the gap between the valve rubber 51 and the gas supply member widens, and more input gas flows to the outlet side via the recess 24 of the joining member 1 shown in FIG. Is adjusted so that a predetermined outlet pressure is obtained.

  The pressure regulator includes a safety valve 58, and the safety valve 58 is urged by a safety valve spring 57b. When the outlet pressure rises unexpectedly, the pressure regulator opens the safety valve 58 to release the gas to the atmosphere and avoid an abnormal rise in pressure. The operating pressure of the safety valve 58 is adapted according to the strength of the safety valve spring 57b.

  The assembled pressure regulator measures the actual adjustment pressure in order to ensure the accuracy of the outlet pressure. If there is a deviation from the design value, the pressure adjustment screw 59 in FIG. Proofread).

  The primary pressure regulator 30 shown in FIG. 4 also operates by the same mechanism as the secondary pressure regulator 40. When the diaphragm 65 is displaced in the vertical direction of the drawing, the opening / closing amount of a valve rubber portion (not shown) connected to the diaphragm 65 is changed, and the amount of gas supplied to the outlet side is increased or decreased. The diaphragm 65 is urged downward by a pressure adjusting spring 67a, and the outlet pressure is adjusted by balancing the elastic force of the pressure adjusting spring 67a with the force by which the outlet gas pushes up the diaphragm 65 by the pressure. . The primary pressure regulator 30 shown in FIG. 4 receives gas from the back side of the drawing and outputs gas from the right side of the drawing. The same applies to FIGS. 6, 7, and 8 to be described later.

  As described above, the tubular member 51 into which the input gas flows is pressed against the valve rubber 51. In this case, it is important that the member is brought into contact with the valve rubber 51 with good sealing performance in the assembled state (when the gas is not used) and the contact size is managed.

  Generally, the sealing property is better when the surface is in contact with the surface than the surface is in contact with the surface. The joining member 1 according to the present embodiment includes a circular contact portion 23 formed around the axis of the distal end surface of the second insertion portion 20, and the contact portion 23 is The shape has a sharp tip. Therefore, the contact portion 23 of the joint member 1 comes into contact with the surface of the valve rubber 51 with a line, and the sealing performance is better than in the case of making contact with the surface.

  Moreover, when connecting using the joining member 1, the length of the joining member 1 inserted in a secondary side pressure regulator is also important. Since the contact portion 23 is assumed to be assembled so as to push the valve rubber 51 at a predetermined pressure when assembled (when gas is not used), the joining member 1 is inserted too much, or If the insertion is insufficient, the initial position of the valve rubber 51 changes, which affects the pressure regulation value.

  In addition, since the pressure regulator is provided with the adjusting screw 59 for finely adjusting the adjustment pressure, the deviation of the pressure adjustment value due to the assembly can be adjusted if it is very small. However, since adjustment with the adjusting screw requires time and labor for assembly, it is preferable to manage the contact size with the valve rubber 51 with high accuracy.

  In connection using a conventional nipple, the nipple employs a taper screw, and therefore, when assembled, the nipple is tightened until the tightening torque of the screw becomes sufficiently high. Although the length of the nipple inserted into the device is considered in the design, it is easily affected by variations in the thread shape and the like, and the length of the nipple inserted into the device cannot be accurately controlled.

  On the other hand, in the connection using the joining member 1 according to the present embodiment, the thread 21 of the second insertion portion 20 of the joining member 1 is a straight screw, and the joining member 1 is connected to the first insertion portion 10. A protrusion 12 is provided. For this reason, when inserting the 2nd insertion part 20 in the secondary side apparatus 40, this protrusion part 12 is inserted in the inside of the secondary side apparatus 40 by contact | abutting to the flange connection surface 41 of the secondary side apparatus 40. The length of the joining member 1 to be managed is accurately controlled, and variation in the contact dimension with the valve rubber 51 is reduced, so that the pressure regulation value deviation due to the assembly can be suppressed.

  In the joining member 1 according to the present embodiment, the gas flows inside the hollow portion 2. In this case, since the diameter of the valve rubber 51 of the secondary pressure regulator is determined, the diameter of the contact portion 23 of the joining member 1 is smaller than the diameter of the valve rubber 51, and accordingly, the contact The diameter of the hollow portion 2 adjacent to the portion 23 is also determined.

  Here, since the one where the diameter of the hollow part 2 is wider is advantageous from the viewpoint of the pressure loss (pressure loss) of the gas, the hollow part of the joining member 1 is formed from the distal end surface of the second insertion part 20 including the contact part 23. You may have a shape which spreads toward the front end surface of the 1st insertion part 10 of the other side. Specifically, as shown in FIG. 3, it can have a gradually diverging shape, or it can have a continuously diverging shape.

(Assembly procedure)
Next, a procedure for connecting the primary device 30 and the secondary device 40 using the joining member 1 according to the present embodiment will be described. As in the above description, the primary device 30 is a primary pressure regulator, and the secondary device 40 is a secondary pressure regulator.

  First, the second insertion portion 20 of the joining member 1 is inserted into the opening 42 of the secondary device 40. In this case, the thread 21 of the joining member 1 is engaged with and inserted into the thread groove 43 formed in the opening 42 of the secondary device 40.

  When the joining member 1 according to the present embodiment is screwed into the opening 42 of the secondary device 40, the protruding portion 12 provided in the first insertion portion 10 of the joining member 1 becomes the secondary device 40. It contacts the flange connection surface 41. This completes the insertion process of the second insertion portion.

  As described above, it is important to accurately manage the contact size of the valve rubber 51 when connecting the pressure regulator. In this regard, if the joint member 1 in the present embodiment is used, the length of the joint member 1 inserted into the secondary device 40 is defined by the protruding portion 12, and therefore, the contact dimension variation in the valve rubber 51 is varied. Can be suppressed, and the labor of calibration of the pressure regulation value in the assembly of the pressure regulator can be reduced.

  Note that an adhesive may be applied to the thread 21 of the second insertion portion 20 and / or the thread groove 43 of the secondary device 40 as necessary, and further an adhesive having a sealing property. Can also be applied. As a result, it is possible to prevent loosening of the screw, improve the durability of the connection, and expect an improvement in sealing performance. An anaerobic adhesive agent etc. can be used as an adhesive agent. Further, by attaching a liquid-tight seal member to the seal member groove 22 closer to the flange connection surface than the thread 21, it is possible to effectively prevent water droplets from entering the flange connection surface.

  Next, the first insertion portion 10 of the joining member 1 is inserted into the opening 32 of the primary side device 30. Here, it is preferable to attach an airtight seal member and a liquid-tight seal member to the seal member grooves 11a and 11b of the first insertion portion 10, respectively. By attaching the seal members having different characteristics as described above, high air tightness and liquid tightness can be realized. In particular, the groove 11b near the flange connection surface is preferably provided with a liquid-tight seal member. By doing in this way, the infiltration of the water droplet from a flange connection surface can be prevented effectively.

  Finally, the flange connection surface 31 of the primary device 30 and the flange connection surface 41 of the secondary device 40 are joined by a general method using bolts or the like. Thereby, the connection of the primary side apparatus 30 and the secondary side apparatus 40 via the joining member 1 is completed.

(Effect of this embodiment)
FIG. 7 is a view for explaining the primary side pressure regulator 71 and the secondary side pressure regulator 72 connected by using the nipple 70. As described above, in this nipple connection, there is a possibility that the angle is shifted, there is also a possibility that the service life is shortened due to deterioration of the sealing performance due to loosening of the screw, and corrosion of the equipment due to water intrusion. On the other hand, in the connection using the joining member according to the present embodiment, there is no fear of angular deviation, and the assembling property and the sealing property are good. Moreover, since the joining member 1 concerning this embodiment functions also as a nozzle of the secondary side pressure regulator 72, it is not necessary for the secondary side pressure regulator 72 to provide a nozzle, and can simplify a structure.

  FIG. 8 is a view for explaining a primary side pressure regulator 81 and a secondary side pressure regulator 82 which are connected by using a general flange body 80. Since the connection is made by the flange connection surface, there is no concern about the angle shift as in the case of the nipple connection, but since the sealing property can be secured only at the flange connection surface, water or the like easily enters, and there is a problem such as corrosion of the equipment.

The pressure regulator connected by using the joining member 1 according to the present embodiment can not only avoid the risk of angular deviation such as nipple connection, but also can ensure sufficient sealing performance via the engaging member 1. Therefore, the durability of the device can be improved. Furthermore, since the contact dimension of the secondary pressure regulator 40 to the valve rubber 51 can be accurately managed by the joining member 1, adjustment during assembly is easy and the assembly is excellent. .

DESCRIPTION OF SYMBOLS 1 Joint member 2 Hollow part 10 1st insertion part 11a, b Groove 12 for sealing members Protrusion part 20 2nd insertion part 21 Thread 22 Groove 23 for sealing members Contact part (nozzle)
24 Depression 30, 71, 81 Primary side device 31 Flange connection surface 32 Opening 40, 72, 82 Secondary side device 41 Flange connection surface 42 Opening 43 Thread groove 51 Valve rubber 52 Valve body 53 Arm 54 Interlock 55 , 65 Diaphragm 56 Pressure receiving plates 57a, 57b, 67a Spring 58 Safety valve 59 Pressure adjusting screw 70 Nipple 80 Flange body

Claims (14)

A joining member for connecting a primary side device and a secondary side device each having a flange connection surface having an opening,
A cylindrical first insertion portion inserted into the opening of the primary device;
A cylindrical second insertion portion that is coaxial with the first insertion portion and is inserted into the opening of the secondary device,
The first insertion portion has at least one seal member around an axis;
The said 2nd insertion part is a joining member which has a screw thread engaged with the thread groove provided in the opening part of the said secondary side apparatus. The joint member according to claim 1, wherein the first insertion portion has two seal members around an axis. The joint member according to claim 2, wherein the two seal members are an airtight seal member on a distal end side of the first insertion portion, and the other is a liquid tight seal member. The joining member according to any one of claims 1 to 3, wherein the second insertion portion includes a seal member adjacent to the first insertion portion. The joining member according to any one of claims 1 to 4, wherein the second insertion portion includes a circular contact portion formed around an axis of a distal end surface thereof. The joining member according to claim 5, wherein the abutting portion has a shape in which a tip of the abutting portion is sharp in an axial sectional shape. The joint member according to claim 5 or 6, wherein the second insertion portion further includes a recess portion on an outer periphery of the contact portion on a tip surface thereof. The said screw is a straight type, The joining member of any one of Claims 1-7. The first insertion portion includes a protrusion that is adjacent to the second insertion portion and protrudes in a direction around the axis in a predetermined section in the axial direction.
The protrusion comes into contact with the flange connection surface of the secondary device when the second insertion portion is inserted into the opening of the secondary device, and thereby the second insertion portion is inserted into the opening. The joining member according to claim 1, wherein a length of the joint member is defined. The joining member according to any one of claims 1 to 9, wherein at least one of the primary device and the secondary device is a pressure regulator. The primary device and the secondary device are two-stage pressure regulators,
The primary device is a primary pressure regulator,
The joint member according to claim 10, wherein the secondary device is a secondary pressure regulator.   The primary side apparatus and secondary side apparatus which were connected by the joining member of any one of Claims 1-11. It is a method of connecting the primary side apparatus and secondary side apparatus each provided with the flange connection surface which has an opening part using the splicing member of any one of Claims 1-11,
Engaging the screw thread of the second insertion portion with the screw groove in the opening of the secondary device, and inserting the second insertion portion;
Inserting the first insertion portion into the opening of the primary device;
Joining the primary side device and the secondary side device at the flange connection surface;
A connection method comprising: A method for connecting a primary side device and a secondary side device each having a flange connection surface having an opening using a joint member having a protruding portion according to claim 9,
The thread of the second insertion portion is engaged with the screw groove in the opening of the secondary device, and the second insertion portion is inserted until the protruding portion contacts the flange connection surface of the secondary device. Process,
Inserting the first insertion portion into the opening of the primary device;
Joining the primary side device and the secondary side device at the flange connection surface;
A connection method comprising:

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