JP3522389B2 - Gas supply device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas supply device for a pressure vessel having a gas valve. In particular, the present invention relates to a gas supply device for supplying a gas to a pressure vessel by pressing a valve stem of a gas valve to open the valve. 2. Description of the Related Art As a prior art relating to the present invention, there is a gas supply device shown in FIG. FIG. 4 is a sectional view of the gas supply device. In FIG. 4, a through hole is formed in the apparatus main body 50 in the axial direction. The through hole has an upper end formed in the engagement screw 51 and a lower side formed in the small-diameter guide hole 52. Further below,
The passage 53 has a larger diameter than the guide hole 52. In addition, an inflow hole 54 is formed in the apparatus main body 50 and communicates with the passage 53 at right angles. The inflow hole 54 is connected to an inflow hole 54 of a pipe joint 55. The pipe joint 55 is connected to a hose joint connected to an external gas supply source. Further, a snap ring groove 56 is formed in the upper part of the engagement screw 51 of the apparatus main body 50. or,
On the outer periphery of the lower end, there is a locking portion 57 formed in a flange shape. The snap ring 73 is attached to the snap ring groove 56 to prevent the moving screw 58 from coming off outward. The adjusting screw 60 inserted into the through hole of the apparatus main body 50 moves forward when the moving screw 58 is screwed into the engaging screw 51 and the handle 59 provided at the rear end is rotated.
It is configured to retreat. The lower side of the moving screw 58 is formed in the guide rod 61 and fits into the guide hole 52, and seals between the fitting surfaces via the O-ring 63. Further, the lower side is formed in the push rod 62 and is fitted to the passage 53 with a gap. A union nut 65 in which a contact portion 64 at one end is engaged with a locking portion 57 at a lower end of the apparatus main body 50 has a tightening screw 66 formed on an inner peripheral surface. This tightening screw 66
The connecting portion 68 having the screw portion 67 screwed with the
On the lower side, a female screw portion 78 that is screwed with the joint male screw portion 71 of the pressure vessel 70 is formed. Note that a packing 72 is interposed between the device main body 50 and the connection portion 68. [0007] The gas supply device configured as described above,
The adjusting screw 6 is attached to the engaging screw 51 of the apparatus main body 50.
The adjustment screw 60 is stopped by a snap ring 73 so that the adjusting screw 60 does not come off. Then, the female thread portion 7 of the connection portion 68
8 is engaged with the external thread portion 71 of the pressure vessel. At the same time, the union nut 65 is tightened to connect
8 is compressed to seal the gap therebetween. In this state, while the pressure fluid is caused to flow from the pipe joint 55 side, the adjustment screw 60 is advanced by turning the handle 59, and the valve rod 75 of the gas valve attached to the pressure vessel 70 is pressed to open the valve. The pressurized fluid is supplied to the inside of 70. [0008] However, when the handle 59 is turned to open the gas valve by the adjusting screw 60, the female thread 78 of the connecting portion 68 and the joint male thread 71 of the pressure vessel 70 are tightened. Since there is an error in the attached dimension and an error in the dimension between the device main body 50 in which the packing 72 is compressed and the connecting portion 68 due to the tightening of the union nut 65, the valve stem 75 of the gas valve is pushed too much. This causes problems such as breakage of the gas valve, and conversely, the opening of the gas valve is too small to supply the fluid pressure to the set pressure. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to supply a set fluid pressure to a pressure vessel on time without causing a gas valve to fail. . [0010] The present invention has been made to solve the above-mentioned problems, and its technical means has a passage opened at one end and communicates with the passage. An apparatus main body having an inflow hole for supplying a fluid, and having a measurement passage communicating with the passage and the gas pressure gauge, a push rod which fits into the passage of the apparatus main body and whose distal end is disposed on the opening side. The apparatus main body and the pressure vessel are connected so that the valve opening / closing rod and the passage having the moving means for moving the tip portion forward and backward to the opening and the supply hole provided with the gas valve of the pressure vessel for supplying the fluid can be communicated. With a connecting portion, the tip portion is a protruding portion that presses the valve stem of the gas valve,
When the protruding portion opens the gas valve, it contacts the opposing portion on the side on which the gas valve is mounted and stops the advancing portion of the protruding portion, and a supply hole traversing the partition portion where the abutment surface is joined and partitioned. And a communication passage for communicating the passage. In the gas supply apparatus of the present invention, when the valve opening / closing rod 13 is advanced by the moving means 24, the protruding portion 20 of the distal end portion 18 moves the valve rod 37 of the gas valve 36 by a set distance to open the valve. I do. In this state, the contact surface 22 of the distal end portion 18 contacts the gas valve 36 to stop the valve opening / closing rod 13 from moving forward. As a result, the gas valve 36
Without opening the valve any more and increasing the flow rate,
In addition, there is no possibility of damage due to excessive pressing. Then, the pressure fluid flowing from the inflow hole 8 flows into the opened pressure vessel. At the same time, the pressure in the pressure vessel flows into the gas pressure gauge 33 through the communication passage 23 traversing the contact surface 22, and the pressure can be measured. Can be. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A gas supply apparatus according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a gas supply device 1 of the present invention. In FIG. 1, reference numeral 2 denotes an apparatus main body. A through hole 3 penetrating in the axial direction is formed in the apparatus main body 2.
The through hole 3 has an engagement screw surface 4 formed on the upper end side and a small diameter guide hole 5 formed below the engagement screw surface 4. Further, the lower side is formed in a passage 6 having a larger diameter than the guide hole 5 and has an opening 7 on the lower surface. An inflow hole 8 is formed in the apparatus main body 2 so as to be orthogonal to the passage 6 (see FIG. 3). One end of the inflow hole 8 has a valve seat (not shown) and a pipe screw (not shown). A connection port 9 is formed. The joint 31 screwed to the connection port 9 is configured to be connectable to a hose. The valve section that opens and closes the valve seat is configured to be opened and closed by a driver 28 on the opposite side, and opens and introduces the pressurized fluid flowing from the hose. Further, a snap ring groove 10 is formed at the upper end of the engagement screw surface 4, and a snap ring 32 is fitted into the snap ring groove 10 to prevent the valve opening / closing rod 13 from coming off. . At the lower end of the apparatus main body 2, a flange-shaped engaging portion 11 is provided. The locking portion 11 engages with the projection 30a of the union nut 30. Further, a mounting hole 12 a for a pipe screw is formed on a side surface of the apparatus main body 2 and communicates with the passage 6.
A pipe joint 34 is screwed into the pipe thread of the mounting hole 12a. A gas pressure gauge 33 is mounted on the pipe joint 34. In addition, the gas pressure gauge 33 and the passage 6 are communicated with each other by the measurement passage 12. The valve opening / closing rod 13 penetrating through the through hole 3 of the apparatus main body 2 has a moving screw 14 screwed to the engaging screw surface 4. The moving screw 14 is engaged with the engaging screw surface 4 and the handle 19 is rotated to move the valve opening / closing rod 13 forward and backward. The moving means 24 is configured to move the three members. The valve opening / closing rod 13 has a guide rod 15 formed below the moving screw 14, and an O-ring groove 16 is formed in the guide rod 15. Furthermore, O-ring groove 1
6 is provided with an O-ring 35. The guide rod 15 is slidably fitted in the guide hole 5 of the apparatus main body 2 and is regulated so that there is no play in the radial direction. Further, the valve opening / closing rod 13 has a push rod 17 below the guide rod 15, and this push rod 17 is fitted to the passage 6 of the apparatus main body 2 with a gap formed therebetween. This gap serves as a flow path for the fluid from the inflow hole 8 to the pressure vessel 70 (for example, an accumulator), and a flow path for communicating the pressure fluid in the pressure vessel 70 with the gas pressure gauge 33. The distal end portion 18 of the push rod 17 has a protruding portion 20 having a smaller diameter than the push rod 17. A collar 21 is fitted to the protruding portion 20, and an abutting surface 22, which is an end surface of the collar 21, is an upper end of the supply hole 27 in which the gas valve 36 of the pressure vessel 70 shown in FIG. 1 or 2 is fitted. It is configured to come into contact with the part surface 38. Further, a communication passage 23 formed in a plurality of grooves is formed in the contact surface 22 so that the inside of the pressure vessel 70 and the gas pressure gauge 33 can communicate with each other. The projecting portion 20, the collar 21, the contact surface 22, and the communication passage 23 allow the tip 18
Is configured. The union nut 30 having a projection 30a engaged with the engaging portion 11 at the lower end of the apparatus main body 2 has an internal thread formed on the inner peripheral surface. This union nut 30
Is screwed with the joint 25. The joint portion 25 and the union nut 30 form a connecting portion 29. The joint 25 has a thread formed on a projection 25b projecting from the flange 25a. This male screw is screwed with the female screw of the union nut 30. The joint 25 is provided with a through hole, and a female screw is formed below the through hole to be screwed with the external thread of the connecting portion 26 of the pressure vessel 70. And the through-hole is formed in the inside diameter with which the collar 21 fits.
Since the collar 21 is guided by the through hole, it is more preferable to form a groove for the fluid passage in the axial direction of the outer periphery. FIG. 2 is a half sectional view of the connecting portion 26 which is not integrated as in FIG. 1 but is screwed to the pressure vessel. A gas valve 36 is screwed into the supply hole 27 of the connection portion 26. The gas valve 36 has a valve rod 37, and the supply hole 2 is moved by moving the valve rod 37 inward.
7 is opened. In addition, 39 is a cap. Reference numeral 40 denotes a packing for the cap 39. When supplying gas, these two parts are removed. The main body 2 and the joint 25 are hermetically connected by tightening the union nut 30 with a packing 40 interposed between the main body 2 and the joint 25, and the passage 6 and the gas valve 36. And the supply hole 27 on the side. Gas supply device 1 configured as described above
Is screwed and fixed to the joint part 25 to the connecting part 26 attached to the pressure vessel 70. Further, the union nut 30
To connect the joint portion 25 and the apparatus main body 2. This constitutes the connecting portion 29, and in this state, the gas supply device 1 is attached to the pressure vessel 70. FIG. 3 is a plan view of the gas supply device 1 of FIG. The operation and effect will be described below with reference to FIGS. First, in order to introduce the pressure fluid into the pressure vessel 70, the driver 28 is turned to open the valve. When the valve is opened, the pressure fluid introduced by the hose flows through the valve into the passage 6. Next, when the handle 19 is rotated to move the valve opening / closing rod 13 downward, the protruding portion 20 of the distal end portion 18 moves the valve rod 37 of the gas valve downward to open the valve. At the same time, the abutting surface 22 of the collar 21 abuts on the end surface 38 of the connecting portion 26, so that the tip portion 18 does not move below that. As a result, the gas valve 3
Since the valve stem 37 of No. 6 is not further lowered, the valve opening flow rate is kept constant, and the valve stem 37 is not pressed to cause damage. At the same time, the pressure in the pressure vessel 70 is
The gas reaches the gas pressure gauge 33 from the passage 6 through the communication passage 23 provided on the first contact surface 22, and the pressure in the pressure vessel 70 can be measured. As another embodiment of the present invention, although not shown, the moving means 24 is of a lever type. That is, the valve opening / closing rod 13 is connected to the upper end of the valve opening / closing rod 13 near the fulcrum of one end, and the free end is lowered by leverage to move the valve opening / closing rod 13 downward and open the gas valve 36. It is. Other configurations are shown in FIG.
Is the same as Further, in another embodiment of the present invention, a mounting hole is provided at the lower end of the push rod 17, and a pin-shaped projecting portion 20 is fitted into the mounting hole. Then, a plurality of communication paths 23 are radially provided on the lower end surface of the push rod 17. That is, in the case of FIG. 1, the opening amount of the gas valve is set by exchanging the collar 21 having a different length, whereas in the present embodiment, the pin-shaped projecting portion 20 having a different length is used. This is to set the valve opening amount by replacement. According to the gas supply apparatus of the present invention, the distal end of the valve opening / closing rod has a protruding portion so that the valve stem of the gas valve can be pressed, and the contact surface has the gas valve. Since the gas valve is configured so as to abut on a reference plane of the connection part provided with the gas valve, the opening amount of the gas valve can be set by the length of the protruding portion protruding from the abutting surface. At the same time, the flow setting valve opening can also be changed by changing and changing the length of the protruding portion. As a result, the valve stem of the gas valve does not move too much and is not damaged. Further, the valve opening amount can be opened as set. Further, the contact surface stops the movement of the valve opening / closing rod and contacts the connection portion side to cut off the communication between the pressure vessel and the gas pressure gauge, but since the communication groove is provided on the contact surface, the pressure is reduced. The pressure in the container can be measured immediately by a gas pressure gauge, and does not exceed the set pressure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a gas supply device according to one embodiment of the present invention. FIG. 2 is a sectional view of a connecting portion according to another embodiment of the present invention. FIG. 3 is a plan view of the gas supply device of FIG. FIG. 4 is a sectional view of a conventional gas supply device. [Description of Signs] 1 ... gas supply device 2, 50 ... device body 3, 69 ... through hole 4 ... engagement screw surface 5, 52 ... guide hole 6, 53 ... passage 7 ... opening 8 .., 54... Inflow hole 9... Connection port 10, 56... Snap ring groove 11, 57. Screw 15, 61 Guide rod 16, O-ring groove 17, 62 Push rod 18, Tip 19, 59 Handle 20, Projecting portion 21, Collar 22, Contact surface 23 ... Communication passage 24... Moving means 25... Joint part 25 a... Flange part 25 b... Convex parts 26 and 68. Nut 30a Protrusion 31 Joint 32, 73 Snap ring 33 Gas pressure gauge 34 Pipe fittings 35 and 63 O-ring 36 Gas valves 37 and 75 Valve stem 38 End face 39 Caps 40 and 72 Packing 51 Engagement screw 55 ... Piping joint 60 ... Adjust screw 64 ... Abutment part 66 ... Tightening screw 67 ... Screw part 70 ... Pressure vessel 71 ... Fitting male thread part 78 ... Female thread part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F17C 5/00-5/06 F17C 13/00 301,13 / 04 F25B 45/00

Claims (1)

(57) Claims 1. An end (6) having an opening (7) at one end and an inflow hole (8) communicating with the passage (6) to supply a fluid, And the passage (6) and the gas pressure gauge (3
3) a main body (2) having a measurement passage (12) communicating with the main body (2), and a front end (18) is disposed on the opening (7) side to fit in the passage (6) of the main body (2). The push rod (17) and the tip (18)
Moving means (24) for moving back and forth into the opening (7)
And a gas valve (3) of a pressure vessel for supplying a fluid with a valve opening / closing rod (13) having
6) a connecting portion (2) for connecting the apparatus main body (2) and the pressure vessel so as to be able to communicate with a supply hole (27);
9), wherein the tip (18) has a protruding portion (20) for pressing a valve stem (37) of the gas valve (36).
When the protruding portion (20) opens the gas valve (36), the protruding portion (20) comes into contact with an opposing portion on the side on which the gas valve (36) is mounted to stop the advancing of the protruding portion (20). ) And a communication passage (23) for communicating the supply hole (27) with the passage (6) across a partition part partitioned by the contact surface (22). apparatus.