CN214274498U

CN214274498U - Vacuum sampling valve

Info

Publication number: CN214274498U
Application number: CN202120161339.5U
Authority: CN
Inventors: 项光远
Original assignee: Wenzhou 100 Class Machinery Manufacturing Co ltd
Current assignee: Baiji Pipe Valve Zhejiang Co ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-09-24
Anticipated expiration: 2031-01-20

Abstract

The utility model relates to a vacuum sampling valve, including valve body and the piston rod of setting in the piston cavity of valve body, still including setting up the pipe box in the piston cavity, follow pipe box length direction is equipped with the constant head tank, be equipped with the stroke locating pin on the piston rod, stroke locating pin head stretches into in the constant head tank and can follow constant head tank length direction action under the piston rod drives. The utility model discloses an add pipe box and stroke locating pin to set up the constant head tank on the pipe box, the stroke locating pin moves in the constant head tank, realizes stroke locate function, and its structural design is ingenious, avoids causing the problem of the risk of leaking and polluting the material easily because of external design.

Description

Vacuum sampling valve

Technical Field

The utility model relates to a sample valve technical field, concretely relates to vacuum sample valve.

Background

The vacuum sampling valve is suitable for sampling powder and liquid, and the valve adopts a plunger full cavity to push the powder, so that the cleanness and no detention in the cavity are ensured, and the vacuum sampling valve is an ideal device for sampling in a vacuum environment. Existing sampling valves lack a positioning design, such as the vacuum sampling valve disclosed in application No. CN 201720241251.8. And the part has the stroke location and sets up in the valve body outside more, and external design has the risk that causes easily leaking and polluting the material, and the structure is complicated.

SUMMERY OF THE UTILITY MODEL

To the not enough in the background art, the utility model provides a vacuum sampling valve.

The utility model adopts the technical proposal that: the utility model provides a vacuum sampling valve, includes the valve body and sets up the piston rod in the piston cavity of valve body, still includes the pipe box that sets up in the piston cavity, follows pipe box length direction is equipped with the constant head tank, be equipped with the stroke locating pin on the piston rod, stroke locating pin head stretches into in the constant head tank and can follow constant head tank length direction action under the piston rod drives.

Further, the pipe sleeve is fixed on the valve body through a pipe sleeve positioning pin.

Further, the outer wall of the pipe sleeve is provided with at least one outer sealing groove, the inner wall of the pipe sleeve is provided with at least one inner sealing groove, and sealing rings are arranged in the outer sealing groove and the inner sealing groove.

Furthermore, the valve further comprises a valve core, a hand wheel and a bearing cover, one end of the piston rod extends into the piston cavity to be connected with the valve core, the other end of the piston rod penetrates through the bearing cover to be arranged outside the valve body to be connected with the hand wheel, and a bearing is arranged between the bearing cover and the piston rod.

Further, be equipped with the sampling tube with piston chamber intercommunication on the valve body, be equipped with the blowoff valve in the sampling tube, be connected with the sampling bottle on the sampling tube.

Furthermore, a connecting flange is arranged on the outer wall of the valve body at the left end of the sampling tube.

Furthermore, a feeding opening is formed in the left end of the valve body, and a sealing inclined opening is formed in the feeding opening.

The utility model has the advantages that: the utility model discloses an add pipe box and stroke locating pin to set up the constant head tank on the pipe box, the stroke locating pin moves in the constant head tank, realizes stroke locate function, and its structural design is ingenious, avoids causing the problem of the risk of leaking and polluting the material easily because of external design.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages.

The present invention will be described in further detail with reference to the drawings.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged schematic view at a in fig. 1.

Fig. 3 is a schematic view of the structure of the pipe sleeve.

In FIGS. 1-3: 1. a valve body; 2. a piston cavity; 3. a piston rod; 4. pipe sleeve; 5. positioning a groove; 6. a travel positioning pin; 7. a pipe sleeve positioning pin; 8. an outer seal groove; 9. an inner seal groove; 10. a valve core; 11. a hand wheel; 12. a bearing cap; 13. a bearing; 14. a sampling tube; 15. an evacuation valve; 16. sampling a bottle; 17. connecting a flange plate; 18. a feeding port; 19. And sealing the bevel opening.

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 efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

The utility model provides a vacuum sampling valve.

In this embodiment, referring to fig. 1 to 3, the vacuum sampling valve includes a valve body 1, a piston rod 3 disposed in a piston cavity 2 of the valve body, and a tube sleeve 4 disposed in the piston cavity, wherein a positioning groove 5 is disposed along a length direction of the tube sleeve, a stroke positioning pin 6 is disposed on the piston rod, and a head of the stroke positioning pin extends into the positioning groove and can move along the length direction of the positioning groove under the driving of the piston rod.

Among the above-mentioned technical scheme, through addding pipe box and stroke locating pin to set up the constant head tank on the pipe box, the stroke locating pin moves in the constant head tank, realizes the stroke locate function, and its structural design is ingenious, avoids causing the problem of the risk of leaking and polluting the material easily because of external design.

Specifically, the pipe sleeve is fixed on the valve body through a pipe sleeve positioning pin 7.

Specifically, the outer wall of the pipe sleeve is provided with at least one outer sealing groove 8, the inner wall of the pipe sleeve is provided with at least one inner sealing groove 9, and sealing rings are arranged in the outer sealing groove and the inner sealing groove.

The sealing rings are arranged on the inner wall and the outer wall of the pipe sleeve, so that the sealing performance of the valve body is ensured.

Specifically, the valve further comprises a valve core 10, a hand wheel 11 and a bearing cover 12, wherein one end of the piston rod extends into the piston cavity to be connected with the valve core, the other end of the piston rod penetrates through the bearing cover to be arranged outside the valve body to be connected with the hand wheel, and a bearing 13 is arranged between the bearing cover and the piston rod. The smooth degree of valve rod action is improved through setting up the bearing, reduces the jamming phenomenon.

Specifically, a sampling tube 14 communicated with the piston cavity is arranged on the valve body, an emptying valve 15 is arranged in the sampling tube, and a sampling bottle 16 is connected to the sampling tube; a connecting flange plate 17 is arranged on the outer wall of the valve body at the left end of the sampling tube; the left end of the valve body is provided with a feeding port 18, and a sealing bevel opening 19 is arranged in the feeding port.

The sealing bevel opening is added, so that the original axial sealing is changed into a plane, and the sealing performance is better.

The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.

Claims

1. The utility model provides a vacuum sampling valve, includes valve body and the piston rod of setting in the piston cavity of valve body, its characterized in that: the piston rod is provided with a stroke positioning pin, and the head of the stroke positioning pin extends into the positioning groove and can move along the length direction of the positioning groove under the driving of the piston rod.

2. The vacuum sampling valve of claim 1, wherein: the pipe sleeve is fixed on the valve body through a pipe sleeve positioning pin.

3. The vacuum sampling valve of claim 1 or 2, wherein: the outer wall of the pipe sleeve is provided with at least one outer sealing groove, the inner wall of the pipe sleeve is provided with at least one inner sealing groove, and sealing rings are arranged in the outer sealing groove and the inner sealing groove.

4. The vacuum sampling valve of claim 1, wherein: the valve further comprises a valve core, a hand wheel and a bearing cover, one end of the piston rod extends into the piston cavity to be connected with the valve core, the other end of the piston rod penetrates through the bearing cover to be arranged outside the valve body to be connected with the hand wheel, and a bearing is arranged between the bearing cover and the piston rod.

5. The vacuum sampling valve of claim 1, wherein: the valve body is provided with a sampling tube communicated with the piston cavity, an emptying valve is arranged in the sampling tube, and the sampling tube is connected with a sampling bottle.

6. The vacuum sampling valve of claim 5, wherein: and a connecting flange is arranged on the outer wall of the valve body at the left end of the sampling tube.

7. The vacuum sampling valve of claim 1, wherein: the left end of the valve body is provided with a feeding port, and a sealing bevel opening is arranged in the feeding port.