CN210716216U

CN210716216U - Vacuum valve

Info

Publication number: CN210716216U
Application number: CN201921180701.2U
Authority: CN
Inventors: 李立其; 李宝华; 徐勤朴; 徐亮
Original assignee: JIANGSU TEYI MACHINERY CO Ltd
Current assignee: JIANGSU TEYI MACHINERY CO Ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-06-09
Anticipated expiration: 2029-07-25

Abstract

The utility model relates to a vacuum valve, which comprises a valve body, the one end of valve body is for getting into the cavity, the other end is the discharge cavity, the last cavity of arranging about the middle part forms in the valve body, lower cavity, it forms the intercommunication with last cavity to get into the cavity, discharge cavity and lower cavity form the intercommunication, go up the cavity, be equipped with the disk seat between the lower cavity, it passes the valve body to be equipped with case and upper end in the cavity to go up, the lower extreme is in the valve body in with case fixed connection's valve rod, the pneumatic cylinder of being connected with the valve rod upper end is equipped with on the valve body, be fixed with the sealing washer on the disk seat, the sealing washer lower part is the dovetail, the dovetail that supplies the sealing washer lower part to put into is seted up to the disk seat upper surface. When the valve is used, the hydraulic cylinder drives the valve rod to drive the valve core to only fall to half height in the valve body, so that the occupied space on the height of the valve body is reduced; through the cooperation of sealing ring, storage tank between case and the disk seat, can promote the sealing performance between disk seat and the case.

Description

Vacuum valve

Technical Field

The utility model relates to the technical field of valves, concretely relates to vacuum valve.

Background

The vacuum valve is used in evacuation equipment, and when the evacuation, the vacuum valve is in the off-state to avoid during the external gas gets into vacuum equipment, and when need not the evacuation, the vacuum valve is opened, and for the medium circulation, current vacuum valve is when the off-state, and owing to structural design's defect between case and the disk seat, lead to the leakproofness poor, and the structure of conventional vacuum valve is mostly: the bottom and the side part of the valve body are provided with inlet and outlet cavities for medium circulation, the bottom in the valve body is provided with a valve seat, an oil cylinder above the valve body drives the valve core to descend from the top in the valve body to the valve seat at the bottom to form contact sealing, so that the valve is in a closed state, when the valve is opened, the oil cylinder drives the valve core to ascend from the bottom of the valve body to the top in the valve body, the movement stroke of the valve core is large, accurate butt joint of the valve core and the valve seat cannot be guaranteed, the height of the valve body is high, and.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a vacuum valve with good sealing performance and small overall occupied space.

Realize the technical scheme of the utility model as follows

The vacuum valve comprises a valve body, wherein one end of the valve body is an inlet cavity, the other end of the valve body is an outlet cavity, an upper cavity and a lower cavity which are arranged up and down are formed in the middle of the valve body through a partition, the inlet cavity is communicated with the upper cavity, the outlet cavity is communicated with the lower cavity, a valve seat is arranged between the upper cavity and the lower cavity, a valve core is arranged in the upper cavity, the upper end of the valve core penetrates through the valve body, the lower end of the valve core is arranged in the valve body and fixedly connected with the valve rod, a hydraulic cylinder connected with the upper end of the valve rod is assembled on the valve body, a sealing ring is fixedly arranged on the valve seat, the lower portion of the sealing ring is in a dovetail shape, a dovetail groove for placing the lower portion of the sealing ring is.

When the technical scheme is adopted, the valve body is internally provided with an upper cavity and a lower cavity, the upper cavity is communicated with the inlet cavity, the discharge cavity is communicated with the lower cavity, and the valve seat is positioned between the upper cavity and the lower cavity; the descending stroke of the valve rod is only half of the inner height of the valve body, so that the occupied space of the valve body in height is reduced; through the cooperation of sealing ring, storage tank between case and the disk seat, can promote the sealing performance between disk seat and the case.

Furthermore, a pressing block for pressing the lower part of the sealing ring in the dovetail groove is fixedly arranged on the valve seat, and the size of the sealing ring is matched with that of the accommodating groove.

Further, the periphery of the lower surface of the valve core is lower than the lower surface of the valve core to form an annular sinking surface, and the sealing ring is fixedly arranged on the sinking surface.

Furthermore, the valve body is arranged above the upper cavity and is provided with a valve cover, the valve cover is fixedly provided with a shaft sleeve, a valve rod penetrates through the shaft sleeve, a first filler, a first spacer ring, a second filler, a second spacer ring and a third filler are sequentially arranged between the inside of the shaft sleeve and the outside of the valve rod from bottom to top, and the lower end of the filler is inserted into the shaft sleeve and abuts against a filler pressing sleeve above the third filler.

Furthermore, a pressing plate positioned above the packing pressing sleeve is sleeved on the valve rod in the air, the pressing plate is assembled at the upper end of the shaft sleeve through a bolt, and an elastic part is arranged between the pressing plate and the packing pressing sleeve.

Furthermore, a support is fixedly arranged on the valve body, the hydraulic cylinder is fixedly assembled on the support, a piston rod of the hydraulic cylinder is fixedly connected with the upper end of the valve rod through a connector, the connector comprises a first connecting block and a second connecting block, an assembling space for inserting the lower end of the piston rod of the hydraulic cylinder and the upper end of the valve rod is formed between the first connecting block and the second connecting block, and a locking screw rod for locking the piston rod and the valve rod is formed by penetrating and connecting the two connecting blocks; the support is internally and fixedly provided with a guide plate which is vertically arranged, guide wheels which are respectively arranged at two sides of the guide plate are assembled on the connector, and the guide wheels are in rolling contact with the side surface of the guide plate.

Furthermore, a pressure relief bypass pipe for communicating the inlet chamber and the outlet chamber is arranged on the valve body, and a pressure relief valve is assembled on the pressure relief bypass pipe.

Drawings

Fig. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is a side schematic view of FIG. 1;

fig. 3 is a schematic top view of the present invention;

FIG. 4 is a cross-sectional view taken at A-A of FIG. 1;

FIG. 5 is an enlarged view of FIG. 1 at B;

FIG. 6 is an enlarged view at C of FIG. 1;

in the drawing, 1 is a valve body, 2 is an inlet chamber, 3 is an outlet chamber, 4 is an upper chamber, 5 is a lower chamber, 6 is a first inclined support plate, 7 is a second inclined support plate, 8 is a valve seat, 9 is a valve core, 10 is a valve rod, 11 is a hydraulic cylinder, 12 is a seal ring, 13 is a dovetail groove, 14 is a containing groove, 15 is a seal ring, 16 is a press block, 17 is a sinking surface, 18 is a valve cover, 19 is an ash cleaning port, 20 is an ash cleaning cover, 21 is a hollow support plate, 22 is a shaft sleeve, 23 is a first filler, 24 is a first spacer ring, 25 is a second filler, 26 is a second spacer ring, 27 is a third filler, 28 is a filler press sleeve, 29 is a press plate, 30 is a bolt, 31 is an elastic member, 32 is a bracket, 33 is a first connecting block, 34 is a second connecting block, 35 is a screw, 36 is an assembly space, 37 is a locking screw, 38 is a guide plate, 39 is a guide wheel, 40 is a pin shaft, 41 is a pressure relief, and 42 is a pressure relief valve.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.

As shown in fig. 1 to 6, the vacuum valve includes a valve body 1, one end of the valve body is an inlet chamber 2, the other end of the valve body is an outlet chamber 3, an upper chamber 4 and a lower chamber 5 which are arranged up and down are formed in the middle of the valve body through a partition, the inlet chamber is communicated with the upper chamber, the outlet chamber is communicated with the lower chamber, a first inclined support plate 6 is fixed on the lower left side of the valve body, a second inclined support plate 7 is fixed on the upper right side of the valve body, and the terms of fixing, assembling and the like which are fixed and mentioned below can be selected from common fixing modes such as welding, screw, bolt connection and the like.

Be provided with disk seat 8 between upper chamber, lower chamber, the left end of disk seat is fixed in the upper end of first bearing diagonal board, and the right-hand member of disk seat is fixed in the lower extreme of second bearing diagonal board, for better forming the support to the disk seat, has fretwork extension board 21 to support in the welding of disk seat top and below. The upper cavity is internally provided with a valve core 9, the upper end of the valve rod penetrates through the valve body, the lower end of the valve rod is positioned in the valve body and fixedly connected with the valve core 10, the valve body is provided with a hydraulic cylinder 11 connected with the upper end of the valve rod, a sealing ring 12 is fixedly arranged on the valve seat, the lower part of the sealing ring is in a dovetail shape, the upper surface of the valve seat is provided with a dovetail groove 13 for the lower part of the sealing ring to be placed in, the upper surface of the sealing ring is provided with a containing groove 14, a sealing ring 15 inserted into the containing groove is fixedly arranged on the lower.

The valve seat is fixedly welded with a pressing block 16 which presses the lower part of the sealing ring in the dovetail groove, the size of the sealing ring is matched with that of the accommodating groove, and after the sealing ring is inserted into the accommodating groove, the bottom wall and the inner walls on two sides of the accommodating groove are respectively contacted with the lower end face and the two side faces of the sealing ring to form triple sealing, so that the sealing capacity of the valve core and the valve seat is ensured.

In order to better enable the sealing ring to be inserted into the containing groove and enable the sealing ring and the containing groove to be better combined, the periphery of the lower surface of the valve core is lower than the lower surface of the valve core to form an annular sinking surface 17, and the sealing ring is fixedly arranged on the sinking surface.

A valve cover 18 is assembled above the upper cavity of the valve body, an ash cleaning port 19 and an ash cleaning cover 20 which is arranged below the ash cleaning port and forms a sealing cover for the ash cleaning port are arranged below the lower cavity of the valve body, and when the valve body needs to be cleaned, the ash deposited in the valve body can be discharged by opening the ash cleaning cover; the valve cover is fixedly provided with a shaft sleeve 22, a valve rod passes through the shaft sleeve, a first filler 23, a first spacer ring 24, a second filler 25, a second spacer ring 26 and a third filler 27 are sequentially arranged between the inside of the shaft sleeve and the outside of the valve rod from bottom to top, and a filler pressing sleeve 28 with the lower end inserted into the shaft sleeve and propped against the upper part of the third filler is arranged on the lower end of the filler pressing sleeve. The bottom in the shaft sleeve is stepped to form a gear for the filler. And the dynamic seal between the shaft and the shaft sleeve is ensured by a plurality of fillers, and the fillers adopt graphite fillers.

The upper part of the valve rod is sleeved with a pressure plate 29 which is arranged above the packing pressing sleeve, the pressure plate is assembled at the upper end of the shaft sleeve through a bolt 30, and an elastic part 31 is arranged between the pressure plate and the packing pressing sleeve and uses a disc spring. Through the locking degree of the bolt, the pressure of the disc spring on the pressing plate can be adjusted, so that the locking degree between the filler and the spacer ring is adjusted.

The valve body is fixedly provided with a support 32, the hydraulic cylinder is fixedly assembled on the support, a piston rod of the hydraulic cylinder is fixedly connected with the upper end of the valve rod through a connector, the connector comprises a first connecting block 33 and a second connecting block 34, the two connecting blocks are fixedly connected through a screw 35, an assembling space 36 for inserting the lower end of the piston rod of the hydraulic cylinder and the upper end of the valve rod is formed between the first connecting block and the second connecting block, and a locking screw 37 penetrates through the two connecting blocks to lock the piston rod and the valve rod, namely the locking screw abuts against the outer wall of the valve rod to form locking, or a blind hole for inserting the locking screw is formed in the valve rod; two guide plates 38 which are vertically arranged are fixedly arranged in the support, the two guide plates are respectively arranged on two sides of the connector, guide wheels 39 are respectively arranged at two ends of the first connecting block and two ends of the second connecting block, and the guide wheels are assembled on the corresponding connecting blocks through pin shafts 40. The leading wheel is located one side of deflector, forms the roll formula contact with the side of deflector, like this when the pneumatic cylinder drives the valve rod up-and-down motion in-process, through the cooperation of leading wheel with the deflector, forms the direction of vertical direction, guarantees the precision of valve rod and below case motion.

The valve body is provided with a pressure relief bypass pipe 41 for communicating the inlet chamber and the outlet chamber, and a pressure relief valve 42 is attached to the pressure relief bypass pipe. When pressure is required to be relieved, the pressure relief valve is opened, so that the inlet chamber is directly communicated with the discharge chamber.

Claims

1. The vacuum valve comprises a valve body and is characterized in that one end of the valve body is an inlet chamber, the other end of the valve body is an outlet chamber, the middle part in the valve body forms an upper chamber and a lower chamber which are arranged up and down through a partition, the inlet chamber is communicated with the upper chamber, the outlet chamber is communicated with the lower chamber,

a valve seat is arranged between the upper chamber and the lower chamber, a valve core and a valve rod with the upper end passing through the valve body and the lower end being positioned in the valve body and fixedly connected with the valve core are arranged in the upper chamber, a hydraulic cylinder connected with the upper end of the valve rod is assembled on the valve body,

the valve seat is fixedly provided with a sealing ring, the lower part of the sealing ring is in a dovetail shape, a dovetail groove for placing the lower part of the sealing ring is formed in the upper surface of the valve seat, an accommodating groove is formed in the upper surface of the sealing ring, and a sealing ring inserted into the accommodating groove is fixedly arranged on the lower surface of the valve core.

2. The vacuum valve according to claim 1, wherein a pressing block for pressing the lower portion of the sealing ring into the dovetail groove is fixedly provided on the valve seat, and the size of the sealing ring is adapted to the size of the receiving groove.

3. The vacuum valve of claim 1, wherein the periphery of the lower surface of the valve core is lower than the lower surface of the valve core to form an annular sinking surface, and the sealing ring is fixedly arranged at the sinking surface.

4. The vacuum valve as claimed in claim 1, wherein the valve body is provided with a valve cover above the upper chamber, the valve cover is fixedly provided with a shaft sleeve, the shaft sleeve is internally provided with the valve rod for passing through, a first packing, a first spacer ring, a second packing, a second spacer ring and a third packing are sequentially arranged between the inside of the shaft sleeve and the outside of the valve rod from bottom to top, and a packing pressing sleeve with the lower end inserted into the shaft sleeve and pressed against the upper side of the third packing.

5. The vacuum valve according to claim 4, wherein a pressing plate is sleeved on the valve rod above the packing pressing sleeve, the pressing plate is assembled at the upper end of the shaft sleeve through a bolt, and an elastic element is arranged between the pressing plate and the packing pressing sleeve.

6. The vacuum valve according to claim 1, wherein a support is fixedly arranged on the valve body, the hydraulic cylinder is fixedly assembled on the support, a piston rod of the hydraulic cylinder is fixedly connected with the upper end of the valve rod through a connector, the connector comprises a first connecting block and a second connecting block, an assembling space for inserting the lower end of the piston rod and the upper end of the valve rod of the hydraulic cylinder is formed between the first connecting block and the second connecting block, and a locking screw rod passes through the two connecting blocks to lock the piston rod and the valve rod;

the support is internally and fixedly provided with a guide plate which is vertically arranged, guide wheels which are respectively arranged at two sides of the guide plate are assembled on the connector, and the guide wheels are in rolling contact with the side surface of the guide plate.

7. The vacuum valve according to any one of claims 1 to 6, wherein a pressure relief bypass pipe for communicating the inlet chamber and the outlet chamber is provided in the valve body, and a pressure relief valve is provided in the pressure relief bypass pipe.