CN210623603U

CN210623603U - Double-eccentric butterfly valve for pressure swing adsorption

Info

Publication number: CN210623603U
Application number: CN201921731472.9U
Authority: CN
Inventors: 张振华
Original assignee: Suzhou Duer Oxygen Equipment Co Ltd
Current assignee: Suzhou Duer Oxygen Equipment Co Ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-05-26
Anticipated expiration: 2029-10-16

Abstract

The utility model discloses a double-eccentric butterfly valve for pressure swing adsorption, which comprises a valve body, a valve rod rotationally connected to the bottom of the valve body is longitudinally inserted into the inner cavity of the valve body, the top end of the valve rod passes through the top of the valve body and is connected with a coupler, the top of the coupler is connected with a driving device fixedly connected to a sleeve, a butterfly plate hermetically connected with the valve body is sleeved on the outer wall of the valve rod inside the valve body, the axis in the vertical direction of the valve rod is collinear with the axis in the vertical direction of the valve body and deviates from the central line of the butterfly plate in the vertical direction and lags behind the sealing plane of the butterfly plate, one side of the butterfly plate is sequentially provided with a valve seat and an insert which are; one side inner wall of valve body is equipped with the dog, and the dog contacts with the butterfly plate rear side under the complete closure state, the utility model discloses, have the characteristics that damage little and the switching speed of valve is fast to the disk seat.

Description

Double-eccentric butterfly valve for pressure swing adsorption

Technical Field

The utility model relates to a VPSA system oxygen technical field specifically is a pressure swing adsorption uses double-eccentric butterfly valve.

Background

The VPSA oxygen producing apparatus is usually applied to pressure swing adsorption technology, and pressure swing adsorption is used as one new type of gas adsorption and separation technology, and has the advantages of high product purity, low work pressure, etc. In pressure swing adsorption, a butterfly valve is often required to control gas inlet and outlet.

The existing butterfly valve applied to pressure swing adsorption has abrasion points when the opening speed is slow during tight sealing, and is fast in abrasion or loose in sealing when the opening speed is fast, so that the valve seat is seriously damaged, and the service life of the valve is shortened; meanwhile, the existing butterfly valve is slow in opening and closing speed, cannot meet the requirement of pressure swing adsorption on fast opening and closing of the valve, and the opening and closing state of the butterfly valve is easy to change during opening and closing, so that the good constant opening and closing state cannot be guaranteed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pressure swing adsorption uses two eccentric butterfly valves to solve the problem that proposes among the above-mentioned background art.

In order to solve the technical problem, the utility model provides a following technical scheme: a double-eccentric butterfly valve for pressure swing adsorption comprises a valve body, wherein a valve rod rotatably connected to the bottom of the valve body is longitudinally inserted into an inner cavity of the valve body, the top end of the valve rod penetrates through the top of the valve body and is connected with a coupler, the top of the coupler is connected with a driving device fixedly connected to a sleeve, a butterfly plate hermetically connected with the valve body is sleeved on the outer wall of the valve rod in the valve body, the axis in the vertical direction of the valve rod is collinear with the axis in the vertical direction of the valve body and deviates from the central line in the vertical direction of the butterfly plate and lags behind the sealing plane of the butterfly plate, a valve seat and an insert which are embedded into the inner cavity of the valve body are; and a stop block is arranged on the inner wall of one side of the valve body and is in contact with the rear side of the butterfly plate in a completely closed state.

Further, the driving device comprises a rotating shaft which is fixedly connected to the coupler and is rotatably arranged on the bottom wall of the sleeve, and a first exhaust port and a second exhaust port which are arranged on the outer wall of one side of the sleeve, the top end of the rotating shaft and the outer wall of one side of the rotating shaft, which is close to the bottom wall of the sleeve, are respectively sleeved with turbine fans with opposite rotation directions of blades, the rotating shaft penetrates through two pistons which are slidably connected with the inner wall of the sleeve and are positioned between the two turbine fans, two supporting rods are connected between the two pistons, two sliding rods which penetrate through the outer wall of the two pistons and are respectively fixed with the top wall and the bottom wall of the sleeve at two ends are connected with the two pistons in a sliding manner, a disc is sleeved outside the rotating shaft between the two pistons, the piston which is close to the top wall of the sleeve and the top wall of the sleeve are connected with a telescopic spring sleeved outside the, and a second air inlet pipe fixedly connected to the sleeve and penetrating through the bottom wall of the sleeve is arranged below the turbine fan close to the bottom of the sleeve in an inclined manner.

Furthermore, four positioning holes distributed in a circumferential array are formed in the disc, and two positioning columns matched with the positioning holes are fixedly welded on one sides, opposite to the two pistons, of the two pistons.

Furthermore, the vertical height between the top end of the first exhaust port and the bottom end of the disk is the same as the thickness of the piston, and the vertical height between the top ends of the disks at the bottom end of the second exhaust port is the same as the thickness of the piston.

Furthermore, one side of the first air inlet pipe and one side of the second air inlet pipe are respectively provided with an electromagnetic control valve.

Furthermore, the bottom of the sleeve is fixed with a mounting bracket which can be fixed with the top of the valve body through a bolt through a screw.

Furthermore, two screws are symmetrically fixed at the top of the valve body, and pressing plates are arranged outside the two screws.

Compared with the prior art, the utility model discloses the beneficial effect who reaches is: the utility model discloses, through setting up the valve rod that deviates from butterfly plate vertical direction central line, lags behind the butterfly plate seal plane, make the in-process of switching this valve, eliminate the butterfly plate and usually in the wearing and tearing point of valve seat top and bottom, effectively lengthen valve life, and make the butterfly plate only rotate along an ninety degrees eccentric arc, satisfy the quick requirement of pressure swing adsorption to valve switch action; through being provided with drive arrangement and coming the drive valve switch, adopt the gas drive mode to realize the butterfly plate fast revolution, realize the fast switch of valve, and keep good valve open or closed state.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 is an overall exploded view of the present invention;

fig. 2 is a schematic structural view of the driving device of the present invention;

fig. 3 is a schematic structural view of the positioning column of the present invention;

fig. 4 is a schematic view of the positioning hole structure of the present invention;

fig. 5 is a schematic view of the piston installation of the present invention;

fig. 6 is a schematic structural view of the stopper of the present invention;

FIG. 7 is a schematic view of the valve seat installation of the present invention;

fig. 8 is a schematic view of the installation of the driving motor of the present invention;

in the figure: 1. a valve body; 11. a stopper; 12. a screw; 2. a valve stem; 3. a sleeve; 31. mounting a bracket; 4. a drive device; 41. a first exhaust port; 42. a second exhaust port; 43. a turbo fan; 44. a first intake pipe; 45. a piston; 451. a positioning column; 46. a disc; 461. positioning holes; 47. a support bar; 471. a tension spring; 48. a slide bar; 49. a rotating shaft; 410. a second intake pipe; 5. a coupling; 6. pressing a plate; 7. a butterfly plate; 8. a valve seat; 9. an insert; 10. an insert spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-8, the present invention provides a technical solution: the valve comprises a valve body 1, a valve rod 2 which is rotatably connected to the bottom of the valve body 1 is longitudinally inserted into an inner cavity of the valve body 1, the top end of the valve rod 2 penetrates through the top of the valve body 1 to be connected with a coupler 5, the top of the coupler 5 is connected with a driving device 4 which is fixedly connected to a sleeve 3, a butterfly plate 7 which is hermetically connected with the valve body 1 is sleeved on the outer wall of the valve rod 2 in the valve body 1, the axis of the valve rod 2 in the vertical direction is collinear with the axis of the valve body 1 in the vertical direction, deviates from the central line of the butterfly plate 7 in the vertical direction and lags behind the sealing plane of the butterfly plate 7, a valve seat 8 and an insert 9 which are embedded into the; a stop block 11 is arranged on the inner wall of one side of the valve body 1, and the stop block 11 is contacted with the rear side of the butterfly plate 7 in the completely closed state.

The driving device 4 comprises a rotating shaft 49 fixedly connected to the coupling 5 and rotatably arranged on the bottom wall of the sleeve 3, and a first exhaust port 41 and a second exhaust port 42 arranged on the outer wall of one side of the sleeve 3, the top end of the rotating shaft 49 and the outer wall of one side close to the bottom wall of the sleeve 3 are respectively sleeved with a turbofan 43 with opposite rotation directions of blades, the rotating shaft 49 penetrates through two pistons 45 which are slidably connected with the inner wall of the sleeve 3 and are positioned between the two turbofan 43, two support rods 47 are connected between the two pistons 45, two slide rods 48 which penetrate through the outer wall of the two pistons 45 and are respectively fixed with the top wall and the bottom wall of the sleeve 3 at two ends are connected between the two pistons 45, the sliding rods 48 and the two pistons 45 are both slidably connected, a disc 46 is sleeved outside the rotating shaft 49 between the two pistons 45, the piston 45 close to the top wall of the sleeve 3 and a top wall part of the sleeve 3 are connected with a telescopic spring 471 which is sleeved outside the slide rod, the second air inlet pipe 410 which is fixedly connected to the sleeve 3 and penetrates through the bottom wall of the sleeve 3 is arranged below the turbine fan 43 close to the bottom of the sleeve 3 in an inclined mode, the valve rod 2 and the butterfly plate 7 are driven to rotate 90 degrees fast through the driving device 4, and the valve is rapidly switched on and off. The driving device 4 can be replaced by a driving motor, and the driving motor directly drives the valve to be opened and closed conveniently, so that the control is convenient.

Four positioning holes 461 distributed in a circumferential array are formed in the disc 46, two positioning columns 451 matched with the positioning holes 461 are fixedly welded on one opposite sides of the two pistons 45, and the positioning columns 451 are driven to be inserted into the positioning holes 461 through the movement of the pistons 45, so that the on-off state of the valve can be conveniently fixed.

The vertical height between the top end of the first exhaust port 41 and the bottom end of the disk 46 is the same as the thickness of the piston 45, and the vertical height between the top ends of the disk 46 at the bottom end of the second exhaust port 42 is the same as the thickness of the piston 45, so that the gas introduced into the interior of the sleeve 3 can be exhausted.

Electromagnetic control valves are respectively arranged on one side of the first air inlet pipe 44 and one side of the second air inlet pipe 410, so that air inlet control is facilitated, and opening and closing of the valves are facilitated.

Two screws 12 are symmetrically fixed on the top of the valve body 1, and the pressing plates 6 are mounted outside the two screws 12, so that the valve rod 2 can be fixed and limited conveniently. The pressing plate 6 and the screw 12 are fixed through nuts, so that the pressing plate 6 can be conveniently mounted and dismounted.

When the valve is opened to be closed, external high-pressure gas is introduced into the first gas inlet pipe 44, the gas drives the turbine fan 43 close to the top wall of the sleeve 3 to rotate clockwise, so as to drive the rotating shaft 49 to rotate rapidly, the rotating shaft 49 drives the valve rod 2 to rotate, the axis of the valve rod 2 in the vertical direction is collinear with the axis of the valve body 1 in the vertical direction and deviates from the central line of the butterfly plate 7 in the vertical direction, and lags behind the sealing plane of the butterfly plate 7, and under the action of the stop block 11, the butterfly plate 7 rapidly rotates clockwise along an eccentric arc of ninety degrees, the rear side of the butterfly plate 7 is in contact with the stop block 11, and along with the continuous introduction of the gas, the pressure of the sealed space formed by the piston 45 close to the top wall of the sleeve 3 and the sleeve 3 is increased continuously, the extrusion piston 45 moves downwards, the piston 45 close to the top wall of the sleeve, the valve seat 8 is effectively prevented from being damaged due to the fact that the butterfly plate 7 is excessively closed, the piston 45 moves to the bottom of the second exhaust port 42 at the moment, gas can be exhausted through the second exhaust port 42, the telescopic spring 471 elastically deforms, the good closing state of the valve is kept, the sealing effect of the valve is improved, and the requirement of pressure swing adsorption on quick opening and closing of the valve is met; when the valve is opened from closing, the ventilation of the first air inlet pipe 44 is stopped, the piston 45 is driven to return to the original position under the elastic action of the telescopic spring 471, then external high-pressure air is introduced into the second air inlet pipe 410, the air drives the turbine fan 43 close to the bottom wall of the sleeve 3 to rotate anticlockwise so as to realize the anticlockwise rotation of the butterfly plate 7, the two pistons 45 are driven to move upwards to the bottom of the disc 46 along with the continuous charging of the air, the piston 45 close to the bottom of the sleeve 3 moves to the top of the first exhaust port 41, and the positioning column 451 on the piston is inserted into the positioning hole 461 to fix the opening state so as to ensure a good opening state.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a pressure swing adsorption uses double-eccentric butterfly valve, includes valve body (1), its characterized in that: a valve rod (2) rotatably connected to the bottom of the valve body (1) is longitudinally inserted into an inner cavity of the valve body (1), the top end of the valve rod (2) penetrates through the top of the valve body (1) and is connected with a coupler (5), the top of the coupler (5) is connected with a driving device (4) fixedly connected to the sleeve (3), a butterfly plate (7) hermetically connected with the valve body (1) is sleeved on the outer wall of the valve rod (2) inside the valve body (1), the axis of the valve rod (2) in the vertical direction is collinear with the axis of the valve body (1) in the vertical direction, deviates from the central line of the butterfly plate (7) in the vertical direction and lags behind the sealing plane of the butterfly plate (7), a valve seat (8) and an insert (9) embedded into the inner cavity of the valve body (1) are sequentially arranged on one side of the butterfly plate (7), and an insert spring (; a stop block (11) is arranged on the inner wall of one side of the valve body (1), and the stop block (11) is in contact with the rear side of the butterfly plate (7) in a completely closed state.

2. The double eccentric butterfly valve for pressure swing adsorption of claim 1, wherein: the driving device (4) comprises a rotating shaft (49) fixedly connected to the coupler (5) and rotatably arranged on the bottom wall of the sleeve (3) and a first exhaust port (41) and a second exhaust port (42) which are arranged on the outer wall of one side of the sleeve (3), a turbofan (43) with opposite rotating directions of blades is sleeved on the top end of the rotating shaft (49) and the outer wall of one side close to the bottom wall of the sleeve (3) respectively, the rotating shaft (49) penetrates through two pistons (45) which are connected with the inner wall of the sleeve (3) in a sliding manner and located between the two turbofan (43), two supporting rods (47) are connected between the two pistons (45), two sliding rods (48) which penetrate through the outer wall of the two pistons and are fixed with the top wall and the bottom wall of the sleeve (3) respectively are connected between the two pistons (45) in a sliding manner, a disc (46) is sleeved outside the rotating shaft (49) between the two pistons (45), piston (45) and sleeve (3) roof wall spare that are close to sleeve (3) roof are connected with cup joints at outside expanding spring (471) of slide bar (48), be equipped with rigid coupling in sleeve (3) and pass first intake pipe (44) of sleeve (3) roof directly over turbofan (43) that are close to sleeve (3) top, be close to turbine fan (43) oblique below of sleeve (3) bottom and be equipped with rigid coupling in sleeve (3) and pass second intake pipe (410) of sleeve (3) diapire.

3. The double eccentric butterfly valve for pressure swing adsorption of claim 2, wherein: four positioning holes (461) distributed in a circumferential array are formed in the disc (46), and two positioning columns (451) matched with the positioning holes (461) are fixedly welded on one sides of the two pistons (45) which are opposite to each other.

4. The double eccentric butterfly valve for pressure swing adsorption of claim 2, wherein: the vertical height between the top end of the first exhaust port (41) and the bottom end of the disc (46) is the same as the thickness of the piston (45), and the vertical height between the top ends of the disc (46) at the bottom end of the second exhaust port (42) is the same as the thickness of the piston (45).

5. The double eccentric butterfly valve for pressure swing adsorption of claim 2, wherein: electromagnetic control valves are respectively arranged on one sides of the first air inlet pipe (44) and the second air inlet pipe (410).

6. The double eccentric butterfly valve for pressure swing adsorption of claim 1, wherein: and the bottom of the sleeve (3) is fixed with a mounting bracket (31) which can be fixed with the top of the valve body (1) through a bolt through a screw.

7. The double eccentric butterfly valve for pressure swing adsorption of claim 1, wherein: the top of the valve body (1) is symmetrically fixed with two screws (12), and the outer parts of the two screws (12) are provided with pressing plates (6).