JPH0682304B2 - Gas amount regulator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Object of the Invention (Field of Industrial Application) The present invention relates to a gas amount regulator that can be used in a simple oxygen scavenger or the like and can supply gas at a constant flow rate.

(Prior Art) The "lightweight oxygen scavenger" (Japanese Patent Application No. 60-78264) and the "simple oxygen scavenger" (Japanese Patent Application No. 60-176841) are related to the applicant of the present patent application. In these gas amount adjusting mechanisms, the flow rate of gas is controlled by the cooperation of the primary valve pin or valve and the sealing member, and the structure is such that the primary pressure is not applied to the spinal surface of this sealing member. There is.

(Problems to be solved by the invention) When gas flows out, depending on the throttle or the consumption situation on the demand side,
The pressure applied to the primary valve pin of the seal member or the joint surface with the valve from the outflow gas changes. Therefore, the sealing member is deformed from the sealing surface side to the opposite surface side, and the flow passage cross section is changed, so that the gas flow rate cannot be kept constant.

(B) Configuration of the Invention (Means for Solving the Problems) The pressure on the primary side applied to the seal surface of the seal member is also applied to the surface opposite to the seal surface of the seal member.

(Operation) In the gas amount regulator according to the present invention, when an external force is applied to the dial, the lever, the knob, or the like, and as a result, the valve is pressed down, the large diameter portion and the seal member are separated from each other, and the gas of the primary pressure is Begins to leak. At this time, pressure on the primary side is applied to the seal side surface of this seal member, and the seal material tries to deform, but this seal member simultaneously applies pressure on the seal side to the side opposite to the seal side. The pressure balance is obtained and the deformation from the sealing surface side to the opposite surface side is prevented. As a result, the cross section of the flow channel was unchanged and the flow rate was constant.

(Example) In the drawings, the same reference numerals indicate the same or corresponding parts.

The main body 1 has a cylindrical shape. A cylinder cutting device 2, a valve 4, and a pressure adjusting mechanism 6 are arranged on the axis of the main body 1. In the cylinder cutting device 2, a needle body 23 having a sealing plate cutting needle 21 protruding at the lower end and having a gas passage hole 22 including this needle is screwed into the lower portion of the main body 1, and the upper surface of the needle body 23 is located above the needle body 23. The packing 26 is placed on the lower surface of the needle body 23 around the needle 21 by contacting the stepped surface 25 at the lower end of the reduced diameter chamber 24.
A cylindrical screw plug 28 having a mounting screw 27 for the cylinder B.
It is fixed to the main body 1 by being screwed into the lower part of the. Through hole
A filter 30 is provided on the enlarged portion 29 at the upper end of 22. Further, the chamber 24 communicates with the upper outside through a gas passage hole 31 having a further reduced diameter.

The valve 4 has a collar 41, a large diameter portion 42, and a small diameter portion 43 formed in this order from the lower end portion to the upper portion. This valve 4 is a through hole on the primary pressure side of the gas of the valve housing 44 fitted in the chamber 24.
The large diameter portion 42 including the collar 41 is inserted into 45, and is constantly pushed upward by a spring interposed between the collar 41 and the filter 30,
The flange 41 at the lower end abuts the step surface 48 at the lower end of the reduced diameter portion 47 that fits into the through hole 31 at the upper part of the through hole 45, and moves upward from that.
Cannot move. In this state, the small diameter portion 43 of the valve 4 is separated from the seal member 49 inserted in the annular groove 47 'at the upper end of the reduced diameter portion 47 of the housing 44, and the valve 4 has the large diameter portion 42 of the seal member 49. Close out the gas outflow by closely contacting the surface 49 '(Fig. 2) on the side that controls the opening and closing of the gas outflow passage. As described above, the valve 4 is for communicating or blocking the primary pressure side and the secondary pressure side of the gas in cooperation with the seal member 49, and the large diameter portion 42
The boundary between the small diameter portion 43 and the small diameter portion 43 is preferably an inclined surface type so as not to damage the surface 49 ′ of the seal member 49 when the valve 4 moves. Further, a pressure receiving collar 49a may be provided on the upper end of the valve 4.

A primary gas pressure is applied to the surface 49 'of the sealing member 49 on the side that controls the opening and closing of the gas outflow passage while the valve 4 is pushed in and the gas is flowing out. Therefore, the primary pressure is also applied to the surface 49 ″ of the sealing member 49 opposite to the surface 49 ′. As a result, the primary gas pressure is applied to both surfaces 49 ′ and 49 ″ of the sealing member 49, and the pressure balance is maintained. can get. Therefore, even if the pressure applied to the surface 49 'of the seal member 49 changes, the surface 49' can be prevented from being distorted toward the surface 49 ". Therefore, between the small diameter portion 43 of the valve 4 and the surface 49 'of the seal member 49. The gap is kept constant, and the gas outflow rate is also constant.

To guide the primary gas pressure to the surface 49 "of the seal member 49, the housing 44 is provided with a conduit 51, one end of which communicates with the through hole 45 and the other end of which communicates with the annular groove 47 '. Fig. 3 shows conduit 51
Is a lateral hole 52 that is formed in the middle of the housing in the radial direction to connect the through hole 45 to the outside, and is provided on the outer surface of the housing 44. The groove 53, which is provided at the upper end of the housing 44 in the radial direction, is constituted by a lateral groove 54 which communicates with the vertical groove 53 at the outer end and communicates with the annular hole 47 'at the inner end. If there is a primary gas pressure in the through hole 45, this pressure acts on the face 49 ″ of the sealing member 49 via the conduit 51 and pushes this member towards its center.

Further, an annular groove 55 is provided on the outer surface of the housing 44 so as to communicate with the outer end of the lateral hole 52, and a plurality of vertical grooves 53 are provided at equal center angles so as to communicate with this groove, and their upper ends are provided with different lateral grooves 54. And centripetically communicate with the annular groove 47 '. In this case, the pressure is applied to the seal member 49 evenly, and the distortion of the cross section of the flow path can be prevented more reliably.

In this case, since the housing 44 is provided with the gas conduit, the work is easy.

When the O-ring R between the needle body 23 and the housing 44 shown in FIG. 1 is unnecessary as shown in FIGS.
As a modification of the guide path 51 of 44, by providing a longitudinal groove 53 on the outer surface over the entire length and then providing radial lateral grooves 54 and 52 'at the upper and lower ends, it is not necessary to form the lateral hole 52 in the housing 44. , Processing becomes easier.

Reference numeral 6 denotes a pressure adjusting mechanism, which is composed of a compression spring 61 and a main piston 62 and a follower piston 63 which are slidably disposed on the compression spring 61 and repel each other. Since the valve 4 comes into contact with the driven piston 63 in the secondary pressure side space portion 8 communicating with the gas supply port 7 with the throttle 71, when the driven piston is lowered, it is pushed and lowered, and when it is raised, the spring 46 And rises due to gas pressure. It is also possible to assemble the driven piston and the valve.

64 is a cover screwed to the main body 1, and 65 is a rod body slidably fitted to this cover, the lower end of which is in contact with the upper surface of the driving piston 62. Of course, the rod body 65 and the driving piston 62 can be integrally formed or screwed together. Further, the rod body 65 may be operated by connecting it to a lever, and if the rod body 65 is screwed to the cover 64, the pressure is adjusted by adjusting the vertical position of the cover 64. In the case shown,
The rod body 65 can be moved downward by a finger (usually a thumb) holding the main body 1 until the lower surface of the head portion 65a thereof comes into contact with the cover 64, thereby stopping the driving piston 62 at a fixed position. You will get it.

By changing the degree of screwing of the main body 1 and the bar 64, it is possible to change the relative movable range d of the rod body 65 with respect to the main body 1. Therefore, the fixed position where the driving piston 62 should stop can be freely adjusted. It is possible to

When the gas cylinder B is attached to the mounting screw 27 with the adjuster shown and screwed in, and the sealing plate is cut by the perforation needle 21, gas flows from the through hole 22 into the through hole 45. Here, the rod body 65 of the pressure adjusting mechanism 6 is pushed until the lower surface of the head portion 65a contacts the upper surface of the cover 64. Then, the valve 4 is pushed down against the spring 46, and the large diameter portion 42 of the valve 4 is separated from the surface 49 ′ of the sealing material 49 and the small diameter portion 42.
43 faces the surface 49 ′ of the seal portion 49. Therefore, the primary pressure gas flows into the secondary pressure side space portion 8, and the pressure adjusting mechanism 6
It is supplied to the demand side from the supply port 7 with the secondary pressure adjusted by. Since the detailed description of the above operation has been given in the specification of the above-mentioned prior application, only a brief description will be given here.

During the gas supply, the gas having the primary pressure that has flowed into the through hole 45 acts on the surface 49 ′ of the seal member 49 when flowing out to the secondary space 8. Therefore, the seal member 49 has a surface opposite to the surface 49 '.
Attempts to distort in the 49 'direction. However, since the primary gas pressure acts on this surface 49 ″ through the gas conduit 51,
The surface 49 'does not distort toward the surface 49 ". Therefore, the distance between the small diameter portion 43 of the valve 4 and the surface 49' of the seal member 49 is kept constant, and the gas flow rate is kept constant.

(Effect of the invention) According to the present invention, the surface of the seal member that cooperates with the valve to control the gas flow path and the surface of the seal member that cooperates with the valve, and the surface opposite to this surface, at least during the gas flow, have the primary gas pressure. It is possible to balance the pressure applied to the seal member,
Therefore, it is possible to prevent distortion of the seal member and keep the gas flow rate constant.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view showing a specific example of a gas amount regulator according to the present invention by cutting off a valve, FIG. 2 is a half-cut side view of a valve housing, FIG. 3 is a plan view of the same, and FIG. The figure is a half-cut side view of another embodiment of the valve housing, and FIG. 5 is a plan view of the same. 1 ... Main body, 2 ... Cylinder cutting device, 4 ... Valve,
41 …… Tsuba, 42 …… Large diameter part, 43 …… Small diameter part, 44 …… Valve housing, 45 …… Through hole, 46 …… Spring, 49 …… Seal member, 49 ′ …… Opening and closing The surface on the palm side, 49 ″ ... the surface on the opposite side, 51 ... the guideway.

Claims (3)

[Claims] 1. A cylinder cutting device on the axis of a cylindrical main body, and a large diameter part of the cylinder itself cooperates with a seal member by a spring and gas pressure to shut off an outflow gas passage to a primary pressure side and a secondary pressure side. In a gas amount regulator with a built-in valve that tends to open, the surface of the sealing member that cooperates with the valve to open and close the gas outflow passage and the surface opposite to this surface are at least the gas outflow. A gas amount regulator, which is sometimes connected to the primary pressure side of this gas. 2. The connection between the opposite surface and the primary pressure side comprises:
A gas conduit provided in a valve housing in which a lower end portion of the valve is slidably fitted, one end of which communicates with a through hole and the other end of which communicates with an annular groove. The gas amount regulator described in the item. 3. A gas amount regulator according to claim 2, wherein the gas guide passage is opened centripetically with respect to the seal member and at a plurality of positions at equal intervals on the circumference.