CN216975798U

CN216975798U - Switching type three-way valve flow-limiting column

Info

Publication number: CN216975798U
Application number: CN202220526850.5U
Authority: CN
Inventors: 袁波; 孙民; 马安利; 翟乃哲; 文世锋
Original assignee: Shandong Danfor Medical Technology Co ltd
Current assignee: Shandong Danfor Medical Technology Co ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-07-15
Anticipated expiration: 2032-03-11

Abstract

The utility model relates to a switching type three-way valve flow-limiting column, which comprises a flow-limiting column body, wherein an inner hole is arranged in the flow-limiting column body, the upper end surface and the lower end surface of the flow-limiting column body are respectively an upper supporting plane and a lower supporting plane, the outer diameters of the upper end and the lower end of the flow-limiting column body are unequal, an annular groove is arranged on the outer diameter of the flow-limiting column body, and a flow-guiding inclined plane is arranged at the joint of the upper end and the lower end of the annular groove and the outer diameter of the flow-limiting column body. According to the utility model, the outer diameters of the upper end and the lower end of the flow limiting column body are unequal, the annular groove is arranged on the outer diameter of the flow limiting column body in a matched manner, and the piston is supported by the large end of the flow limiting column body, so that the middle diameter of the flow limiting device is reduced, the space for air intake and nitrogen discharge is enlarged under the condition of not influencing the service life of the flow limiting column body, and the large-flow gas with smaller pressure can be obtained.

Description

Switching type three-way valve flow-limiting column

Technical Field

The utility model relates to a switching type three-way valve flow limiting column, and belongs to the technical field of oxygen generation flow limiting parts.

Background

The adsorption tower is the key part of molecular sieve system oxygen, and the molecular sieve adsorption tower passes through the three-way valve and controls business turn over gas and arrange nitrogen, and current like product, the upper and lower diameter that the restriction lived is the same big, and he can obtain higher pressure and less flow like this, is suitable for liquid to carry like this and switches control, but when making oxygen, needs to obtain less atmospheric pressure and great flow, and air admission and row nitrogen are obstructed otherwise, and especially row nitrogen is obstructed influences oxygen concentration and improves.

SUMMERY OF THE UTILITY MODEL

The utility model provides a switching type three-way valve flow limiting column, which solves the problems that air entering and nitrogen discharging are easily blocked due to the current flow limiting of a three-way valve, and particularly the oxygen concentration is improved due to the blockage of the nitrogen discharging.

The utility model relates to a switching type three-way valve flow-limiting column, which comprises a flow-limiting column body, wherein an inner hole is arranged in the flow-limiting column body, the upper end surface and the lower end surface of the flow-limiting column body are respectively an upper supporting plane and a lower supporting plane, the outer diameters of the upper end and the lower end of the flow-limiting column body are unequal, an annular groove is arranged on the outer diameter of the flow-limiting column body, and a flow-guiding inclined plane is arranged at the joint of the upper end and the lower end of the annular groove and the outer diameter of the flow-limiting column body.

The included angle between the flow guide inclined plane and the horizontal plane is 45-60 degrees, and the distance between the outer end part of the flow guide inclined plane and the end face of the flow limiting column body is not more than 0.8 cm. The space for air intake and nitrogen exhaust can be enlarged as much as possible, and the smoothness of air intake and nitrogen exhaust is ensured.

The upper end and the lower end of an inner hole of the flow limiting column body are provided with a first annular sealing groove, and a first sealing ring is arranged in the first sealing groove. When can prevent the denitrogenation, nitrogen gas passes through the hole and discharges from the air inlet, influences system oxygen effect.

And a second sealing groove is formed in the upper supporting plane and the lower supporting plane outside the inner hole, and a second sealing ring is arranged in the second sealing groove. Further increasing the sealing effect.

The utility model has the following beneficial effects:

through the external diameter inequality at the upper and lower both ends of current-limiting post body to the cooperation is equipped with the annular groove on current-limiting post body external diameter, through current-limiting post body main aspects support piston, under the condition that does not influence current-limiting post body life, reduces the diameter in the middle of the current-limiting device, increases the space of admitting air and nitrogen exhaust, can obtain the large-traffic gas of less pressure.

Drawings

FIG. 1 is a schematic structural view of embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of embodiment 2 of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

FIG. 4 is a state diagram of use of embodiment 1;

in the figure: 1. an annular groove; 2. a current-limiting column body; 3. an inner bore; 4. a diversion bevel; 5. an upper support plane; 6. a lower support plane; 7. sealing the second groove; 8. sealing the first groove; 9. a first sealing ring; 10. a second sealing ring 11, a plug 12, a guide rod 13 and a piston.

Detailed Description

The present invention will be further described with reference to the following examples.

Embodiment 1, as shown in fig. 1 and 4, the present invention is a switching three-way valve flow-limiting column, including a flow-limiting column body 2, an inner hole 3 is provided in the flow-limiting column body 2, upper and lower end surfaces of the flow-limiting column body 2 are respectively an upper support plane 5 and a lower support plane 6, outer diameters of upper and lower ends of the flow-limiting column body 2 are unequal, an annular groove 1 is provided on the outer diameter of the flow-limiting column body 2, and a flow-guiding inclined plane 4 is provided at a connection between the upper and lower ends of the annular groove 1 and the outer diameter of the flow-limiting column body 2.

The included angle between the diversion inclined plane 4 and the horizontal plane is 45-60 degrees, and the distance between the outer end part of the diversion inclined plane 4 and the end surface of the current-limiting column body 2 is not more than 0.8 cm.

During installation, the current-limiting column body 2 is sleeved on the guide rod 12 of the piston 13, the upper supporting plane 5 of the current-limiting column body 2 is in contact with the plug 11, and the lower supporting plane 6 of the current-limiting column body 2 is in contact with the piston 13, so that the large end face of the current-limiting column body 2 can support the piston 13 and cannot influence the service life.

The theory of operation is through the external diameter inequality at the upper and lower both ends of current-limiting post body 2 to the cooperation is equipped with annular groove 1 on current-limiting post body 2 external diameter, through current-limiting post body 2 main aspects support piston 13, under the condition that does not influence current-limiting post body 2 life, reduces the diameter in the middle of the current-limiting device, increases the space of admitting air and nitrogen discharging, can obtain the large-traffic gas of less pressure.

In embodiment 2, as shown in fig. 2 and 3, on the basis of embodiment 1, annular first sealing grooves 8 are formed at the upper and lower ends of an inner hole 3 of a flow limiting column body 2, and first sealing rings 9 are arranged in the first sealing grooves 8.

And a second sealing groove 7 is formed in the upper supporting plane 5 and the lower supporting plane 6 on the outer side of the inner hole 3, and a second sealing ring 10 is arranged in the second sealing groove 7.

Before installing current-limiting post body 2, put into sealed recess 8 to compress tightly sealing washer one 9, put into sealed recess two 7 to compress tightly sealing washer two 10, then overlap current-limiting post body 2 on guide arm 12 again, and the last supporting plane 5 and the end cap 11 contact of current-limiting post body 2, the lower supporting plane 6 and the piston 13 contact of current-limiting post body 2, seal, when gas outlet department blowback carries out the nitrogen extraction, as shown in figure 4, gas is discharged from the nitrogen extraction mouth, can not get into the clearance between guide arm 12 and the end cap 11 through hole 3 and discharge from the air inlet.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are for convenience only to describe the present invention without requiring the present invention to be necessarily constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Claims

1. The utility model provides a switching formula three-way valve current-limiting post, includes current-limiting post body (2), its characterized in that: be equipped with hole (3) in current-limiting post body (2), the upper and lower terminal surface of current-limiting post body (2) is last supporting plane (5) and lower support plane (6) respectively, and the external diameter inequality at the upper and lower both ends of current-limiting post body (2) is equipped with annular groove (1) on the current-limiting post body (2) external diameter, and the upper and lower both ends of annular groove (1) are equipped with water conservancy diversion inclined plane (4) with current-limiting post body (2) external diameter junction.

2. The switching three-way valve flow restriction column of claim 1, wherein: the included angle between the diversion inclined plane (4) and the horizontal plane is 45-60 degrees, and the distance between the outer end part of the diversion inclined plane (4) and the end surface of the current-limiting column body (2) is not more than 0.8 cm.

3. The switching three-way valve flow restriction column of claim 1, wherein: an annular first sealing groove (8) is formed in the upper end and the lower end of an inner hole (3) of the flow limiting column body (2), and a first sealing ring (9) is arranged in the first sealing groove (8).

4. A switching three-way valve flow restricting column according to claim 3, characterized in that: and an upper supporting plane (5) and a lower supporting plane (6) on the outer side of the inner hole (3) are respectively provided with a second sealing groove (7), and a second sealing ring (10) is arranged in the second sealing groove (7).