CN209818875U

CN209818875U - Normally open type pneumatic column unloading valve

Info

Publication number: CN209818875U
Application number: CN201920370211.2U
Authority: CN
Inventors: 陶志钢
Original assignee: Rongjie Bioengineering (suzhou) Co Ltd
Current assignee: Rongjie Bioengineering (suzhou) Co Ltd
Priority date: 2019-03-22
Filing date: 2019-03-22
Publication date: 2019-12-20
Anticipated expiration: 2029-03-22

Abstract

The utility model discloses a normally open type pneumatic column discharging valve, which comprises a valve body, wherein a valve body screw is hermetically connected below a chromatography column bottom plate, a discharging pipe is longitudinally arranged in the valve body in a penetrating way, a channel is formed between the outer wall of the discharging pipe and the inner wall of the valve body, the top end of the discharging pipe is fixedly provided with a sealing plug matched and connected with the central hole of the chromatography column bottom plate, the bottom end of the discharging pipe is fixedly provided with a bottom joint connected with a lower cleaning water pipe, one side of the valve body is provided with an inclined joint communicated with a filtrate collecting hole, the other side of the valve body is provided with a vertical joint communicated with the channel, the bottom end of the valve body is provided with a, and the bottom joint extends out of the bottom end of the air cylinder assembly, the end surface of the bottom of the valve body is transversely provided with a groove, a ventilation blind hole is longitudinally arranged in the groove, and the side surface of the bottom of the valve body is provided with a pneumatic quick-plugging joint communicated with the ventilation blind hole. The column unloading valve is simple in structure, convenient and fast to operate, labor-saving, good in sealing performance, capable of reducing failure rate and improving production efficiency.

Description

Normally open type pneumatic column unloading valve

Technical Field

The utility model relates to a bioengineering technical field, concretely relates to post valve is unloaded in pneumatics of open in usual.

Background

The chromatographic column is the main body in gel chromatography technology and needs to be matched with a column unloading valve for use. The existing column unloading valve is mostly a manual column unloading valve, trapezoidal threads of a screw rod and a screw sleeve are screwed by rotating a handle, so that the screw sleeve is driven to move up and down (the screw rod is static relative to a valve body), and then the sealed plug is driven to move up and down, so that the column unloading valve is opened and closed. However, as the handle is fixed on the fixed plate, when the handle rotates, the fixed plate and the discharge pipe rotate relatively, and debris is easily generated due to friction between the fixed plate and the discharge pipe, the mechanical lifting mechanism is blocked, the failure rate of the column discharge valve is increased, and the working efficiency of the chromatographic column is influenced; in addition, the column discharge valve is usually installed below the bottom plate of the chromatographic column, the space below the bottom of the chromatographic column is limited, an operator needs to squat down to rotate the handle, and the operation is very inconvenient.

Disclosure of Invention

To the above defect of prior art or improve the demand, the utility model provides a column valve is unloaded in pneumatics of open always, simple structure, simple operation, laborsaving, and the leakproofness is good, has reduced the fault rate, has improved production efficiency.

The purpose of the utility model is to realize through the following technical scheme:

the utility model discloses a normally open pneumatic column unloading valve, which comprises a valve body, wherein a valve body screw is connected below a chromatography column bottom plate in a sealing way, a central hole is arranged in the middle of the chromatography column bottom plate, a discharge pipe is longitudinally arranged in the valve body in a penetrating way, a channel is formed between the outer wall of the discharge pipe and the inner wall of the valve body, the top end of the discharge pipe is fixedly provided with a sealing plug matched with the central hole, the bottom end is fixedly provided with a bottom joint connected with a lower cleaning water pipe, one side of the valve body is provided with an inclined joint communicated with a filtrate collecting hole, the other side of the valve body is provided with a vertical joint communicated with the channel, the bottom end of the valve body is provided with a cylinder component for driving the discharge pipe and further driving the sealing plug to move up and down, the discharge pipe penetrates through the inside of the cylinder component, and the, the end face of the bottom of the valve body is transversely provided with a groove, the groove is internally and longitudinally provided with a ventilation blind hole, and the side face of the bottom of the valve body is provided with a pneumatic quick connector communicated with the ventilation blind hole.

Further, the air cylinder assembly comprises a hollow cylinder body, a piston and a spring, the piston and the spring are arranged in the cylinder body, the cylinder body is in sealing threaded connection with the bottom end face of the valve body, the piston is fixedly welded on the outer wall of the discharge pipe and moves in the cylinder body in a sealing reciprocating mode, and the spring is sleeved outside the discharge pipe and arranged between the piston and the bottom end of the cylinder body in a supporting mode.

Furthermore, a limit stop for limiting the motion stroke of the piston is arranged in the cylinder body, and the maximum stroke of the piston is the same as the height of the sealing plug extending out of the bottom plate.

Further, cylinder body top terminal surface through a plurality of O type circle with valve body bottom end face seal spiro union in an organic whole, the seal groove of piston passes through UN circle sealed just the piston with the sealed movable connection of cylinder body inner wall.

Further, a wear-resistant gasket is arranged between the bottom of the spring and the bottom end of the cylinder body.

Further, the wear-resistant gasket is a plastic gasket, a nylon gasket or a stainless steel gasket.

Furthermore, the external thread at one end of the pneumatic quick connector is in threaded connection with the inside of the valve body, and the other end of the pneumatic quick connector is connected with a compressed gas source.

Further, the filtrate collecting holes are uniformly distributed on the chromatography column bottom plate, and a filter plate is arranged above the chromatography column bottom plate.

Compared with the prior art, the technical scheme of the utility model has following advantage:

the normally open type pneumatic column discharging valve provided by the utility model is integrally connected in a sealing way, and has good sealing performance; the structure cooperation with cylinder assembly and pneumatic quick connector realizes the quick lift of sealed end cap and the quick opening and shutting of valve body, simple structure, and simple operation, laborsaving has reduced the fault rate, has improved production efficiency.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the specific embodiments. The drawings are only for purposes of illustrating the particular embodiments and are not to be construed as limiting the invention. In the drawings:

FIG. 1 is a sectional view of the structure of the present invention;

wherein: 10. a chromatography column base plate; 20. a valve body; 30. a cylinder assembly; 11. a central bore; 12. a filter plate; 13. a filtrate collection well; 21. a discharge pipe; 22. a channel; 23. sealing the plug; 24. a bottom joint; 25. an inclined interface; 26. a vertical interface; 27. a groove; 28. a blind ventilation hole; 29. a pneumatic quick connector; 31. a cylinder body; 32. a piston; 33. a spring; 34. a limiting gear; 35. and (7) circling UN.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Examples of the embodiments are illustrated in the accompanying drawings, and the specific embodiments described in the following embodiments of the present invention are merely illustrative of the specific embodiments of the present invention, and are intended to be used for explaining the present invention, and not to constitute limitations of the present invention.

A normally open type pneumatic column unloading valve is shown in figure 1 and comprises a valve body 20 and an air cylinder assembly 30, wherein the valve body 20 is in screw sealing connection with the lower part of a chromatography column bottom plate 10, and the air cylinder assembly 30 is arranged at the bottom end of the valve body 20.

The middle part of the chromatographic column bottom plate 10 is provided with a central hole 11, a filter plate 12 is arranged above the chromatographic column bottom plate 10, and filtrate collecting holes 13 are uniformly distributed on the chromatographic column bottom plate 10 to form an outflow channel of filtrate.

Inside vertical the running through of valve body 20 is equipped with a discharge tube 21, forms a passageway 22 between the outer wall of discharge tube 21 and the inner wall of valve body 20, and the fixed sealed end cap 23 that is provided with in top of discharge tube 21, sealed end cap 23 and centre bore 11 join in marriage each other and connect, and cylinder assembly 30 is used for driving discharge tube 21, and then drives sealed end cap 23 and reciprocate to realize opening and closing of valve body 20, the bottom mounting of discharge tube 21 is provided with the bottom joint 24 that is connected with lower washing water pipe.

One side of the valve body 20 is provided with an inclined joint 25 communicated with the filtrate collecting hole 13, and the other side is provided with a vertical joint 26 communicated with the channel 22; when the column discharging valve is closed, the plasma filtrate can only flow out of the column discharging valve from the inclined connector 25 through the filter plate collecting hole 13 after being filtered by the filter plate 12; when the column unloading valve is closed, the bottom connector 24 is communicated with the vertical connector 26, pure water is pumped into the bottom connector 24 through the lower cleaning water pipe to clean the internal flow passage of the valve body 20, and the waste water flows out through the vertical connector 26.

The discharge tube 21 runs through the inside of the cylinder assembly 30, and the bottom joint 24 extends out of the bottom end of the cylinder assembly 30, the bottom end face of the valve body 20 is transversely provided with a groove 27, the groove 27 is longitudinally provided with a ventilation blind hole 28, the side face of the bottom of the valve body 20 is provided with a pneumatic quick-connection plug 29 communicated with the ventilation blind hole 28, in the figure 1, one end of the pneumatic quick-connection plug 29 is in threaded connection with the inside of the valve body 20 through external threads, and the other end of the pneumatic quick-connection plug 29 is connected with.

As shown in fig. 1, the cylinder assembly 30 includes a hollow cylinder 31, and a piston 32 and a spring 33 disposed in the cylinder 31, the cylinder 31 is screwed to the bottom end face of the valve body 20 in a sealing manner, that is, the top end face of the cylinder 31 is screwed to the bottom end face of the valve body 20 in a sealing manner through a plurality of O-rings, the piston 32 is fixedly welded to the outer wall of the discharge pipe 21, a sealing groove of the piston 32 is sealed by a UN ring 35, the piston 32 reciprocates in the cylinder 31, the spring 33 is sleeved outside the discharge pipe 21 and is disposed between the piston 32 and the bottom end of the cylinder 31 in a supporting manner, and a wear-resistant gasket is disposed between the bottom end of the spring 33 and the bottom end of the cylinder 31, and may be a plastic gasket or a.

A limit stop 34 for limiting the movement stroke of the piston 32 is arranged in the cylinder 31, the limit stop 34 is located at the middle position of the cylinder 31, and the maximum stroke of the piston 32 is the same as the height of the sealing plug 23 extending out of the bottom plate 10. When the pneumatic quick connector is in operation, compressed gas is directly introduced into the pneumatic quick connector 29, the piston 32 starts to move downwards due to the pressure of the compressed gas and compresses the spring 33, when the piston 32 presses the limiting stopper 34, the piston 32 moves to the maximum stroke position, the top of the sealing plug 23 is flush with the bottom plate 10, and at the moment, the sealing plug 23 just plugs the central hole 11 of the bottom plate 10, so that quick closing of the central hole 11 is realized, namely quick closing of the valve body 20 is realized. Similarly, the pressure gas of the pneumatic quick connector is discharged, the external compression force disappears, the spring 33 recovers deformation, the piston 32 moves upwards under the pushing of the self elasticity of the spring 33 and drives the discharge pipe 21 and the sealing plug 23 to ascend, and at the moment, the central hole 11 of the bottom plate 10 is opened, so that the valve body 20 is quickly opened.

In summary, the normally open type pneumatic column discharging valve provided by the utility model is integrally sealed and connected, and has good sealing performance; the structure cooperation with cylinder assembly and pneumatic quick connector realizes the quick lift of sealed end cap and the quick opening and shutting of valve body, simple structure, and simple operation, laborsaving has reduced the fault rate, has improved production efficiency.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, the word "comprising" does not exclude the presence of data or steps not listed in a claim.

Claims

1. The utility model provides a pneumatic post valve of unloading of open in usual, includes the valve body, valve body screw sealing connection is in chromatography column bottom plate below chromatography column bottom plate middle part is opened there is the centre bore, the valve body is inside vertically to run through and is equipped with a discharge tube, the outer wall of discharge tube with form a passageway between the inner wall of valve body, the top of discharge tube fixed be equipped with sealed end cap that the centre bore matches and connects, bottom mounting are equipped with the bottom joint that is connected with lower washing water pipe, valve body one side be equipped with the oblique interface that communicates mutually with filtrating collection hole, the opposite side be equipped with the perpendicular interface that the passageway is linked together, its characterized in that: the bottom end of the valve body is provided with a cylinder assembly which drives the discharge pipe and further drives the sealing plug to move up and down, the discharge pipe penetrates through the inside of the cylinder assembly, the bottom connector extends out of the bottom end of the cylinder assembly, a groove is transversely formed in the end face of the bottom of the valve body, a ventilation blind hole is longitudinally formed in the groove, and a pneumatic quick-plugging connector communicated with the ventilation blind hole is arranged on the side face of the bottom of the valve body.

2. The normally open pneumatic unloader column valve of claim 1, wherein: the air cylinder assembly comprises a hollow cylinder body, a piston and a spring, the piston and the spring are arranged in the cylinder body, the cylinder body is in threaded connection with the bottom end face of the valve body in a sealing mode, the piston is fixedly welded on the outer wall of the discharging pipe and moves in the cylinder body in a sealing and reciprocating mode, the spring is sleeved outside the discharging pipe and arranged between the piston and the bottom end of the cylinder body in a supporting mode.

3. A normally open pneumatic unloader column valve according to claim 2, wherein: and a limiting stopper for limiting the motion stroke of the piston is arranged in the cylinder body, and the maximum stroke of the piston is the same as the height of the sealing plug extending out of the bottom plate.

4. A normally open pneumatic unloader column valve according to claim 2, wherein: the cylinder body top terminal surface through a plurality of O type circles with valve body bottom end face seal spiro union in an organic whole, the seal groove of piston passes through the UN circle sealed just the piston with the sealed movable connection of cylinder body inner wall.

5. A normally open pneumatic unloader column valve according to claim 2, wherein: and a wear-resistant gasket is arranged between the bottom of the spring and the bottom of the cylinder body.

6. The normally open pneumatic unloader column valve of claim 5, wherein: the wear-resistant gasket is a plastic gasket, a nylon gasket or a stainless steel gasket.

7. The normally open pneumatic unloader column valve of claim 1, wherein: and one end of the pneumatic quick connector is in threaded connection with the valve body through external threads, and the other end of the pneumatic quick connector is connected with a compressed gas source.

8. The normally open pneumatic unloader column valve of claim 1, wherein: the filtrate collecting holes are uniformly distributed on the chromatographic column bottom plate, and a filter plate is arranged above the chromatographic column bottom plate.