CN110836284A

CN110836284A - Vacuum negative pressure safety valve

Info

Publication number: CN110836284A
Application number: CN201911116492.XA
Authority: CN
Inventors: 冯森蕾
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-02-25

Abstract

The invention discloses a vacuum negative pressure safety valve which comprises a device main body, wherein the lower end of the device main body is in threaded connection with a pipeline through a fastening bolt, a circular plate is sleeved on the outer wall of the lower end of the device main body, a vertical rod is fixedly arranged at the lower end of the circular plate, the lower end of the vertical rod penetrates through the lower end of the device main body, a rubber cushion is fixedly arranged at the lower end of the vertical rod, the lower end of the rubber cushion is attached to the upper end of the pipeline, the outer wall of the upper end of the device main body is in threaded connection with a cover body, a sealing plate is arranged on the inner wall of the device main body, the peripheral side of the sealing plate is embedded into. According to the invention, the vertical rods are matched with the rubber cushion, so that the device main body is always in a vertically mounted state when the device main body is mounted, the stability of the device is improved, and meanwhile, the sealing property of the device is improved.

Description

Vacuum negative pressure safety valve

Technical Field

The invention relates to the technical field of safety valves, in particular to a vacuum negative pressure safety valve.

Background

The relief valve plays the safety protection effect in the system, when system pressure exceedes the specified value, the relief valve is opened, partly gaseous atmosphere of going into in the system, make system pressure no longer exceed the allowable value, thereby guarantee the system not because of the too high emergence accident of pressure, traditional vacuum negative pressure relief valve is when installing, because the piston rod is vertical installation with the closing plate, when pressure resumes to the normal value, can the piston rod will be under the effect of gravity and spring, close with the closing plate together again, but when vacuum negative pressure relief valve is not vertical installation, when the piston rod descends, the skew takes place easily, lead to leaving the gap between piston rod and the closing plate, can not play the guard action, consequently, need a vacuum negative pressure relief valve to solve above-mentioned problem of proposing urgently.

Disclosure of Invention

The invention aims to provide a vacuum negative pressure safety valve, which aims to solve the problem that when the vacuum negative pressure safety valve is not vertically installed, a piston rod is easy to deviate when descending, so that a gap is reserved between the piston rod and a sealing plate, and the protection effect cannot be achieved.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a vacuum negative pressure relief valve, includes the device main part, fastening bolt and pipeline threaded connection are passed through to the lower extreme of device main part, the circular slab has been cup jointed to the lower extreme outer wall of device main part, the lower extreme fixed mounting of circular slab has the montant, the lower extreme of montant passes the lower extreme of device main part, the lower extreme fixed mounting of montant has the rubber cushion, the lower extreme of rubber cushion and the upper end laminating of pipeline, the upper end outer wall and the lid threaded connection of device main part, the closing plate is installed to the inner wall of device main part, the week side embedding of closing plate is at the inner wall of fixed slot, install the vertical open-ended piston rod that passes on the closing plate, the intermediate position at the closing plate is seted up to the opening, the outer wall fixed mounting of piston rod.

Preferably, the inner wall of the device body is provided with a projection protruding inward, and the projection is mounted at the lower end of the sealing plate.

Preferably, the outer wall fixed mounting of montant has the stopper, the stopper embedding is at the inner wall of spacing groove, the lower extreme inner wall at the device main part is seted up to the spacing groove, through first spring fixed connection between the inner wall of stopper and spacing groove.

Preferably, the lower end of the sealing plate is attached to the movable plate, the lower end of the movable plate is embedded into the inner wall of the clamping groove, the movable plate is fixedly connected with the inner wall of the clamping groove through a second spring, and the clamping groove is formed in the inner wall of the device main body and can be matched with the fixing groove.

Preferably, the outer wall of the sealing plate is uniformly provided with a convex fixing block, and the size of the outer wall of the fixing block is the same as that of the inner wall of the upper end of the fixing groove.

Preferably, the fixing groove is formed on a projection on the inner wall of the device body, and the lower end of the fixing groove is annular.

Compared with the prior art, the invention has the beneficial effects that:

1. this vacuum negative pressure relief valve, mutually support through setting up the montant and rubber cushion, can be when the installation device main part, make the device main part be in the state of vertical installation all the time, thereby avoided when the vacuum negative pressure relief valve is not vertical installation, when the piston rod descends, the skew takes place easily, lead to leaving the gap between piston rod and the closing plate, can not play the guard action's problem, the stability of device has been improved, simultaneously, through the rubber cushion, make installation more firm between device main part and the pipeline, avoid the direct gap that passes through between device main part and the pipeline of air to enter into the inside of pipeline, thereby lead to the problem that the pipeline was revealed, the leakproofness of device has been improved.

2. This vacuum negative pressure relief valve, mutually support through setting up fixed slot and piston rod, can conveniently install the dismantlement to the closing plate, avoided because produce some water droplets easily between piston rod lower extreme and the closing plate, the outer wall that leads to the piston rod produces the gap, need regularly dismantle piston rod and closing plate and wash and clean, cause the problem that the leakproofness reduces between closing plate and the device main part easily, made things convenient for the inside to the device to clear up the maintenance, the inside cleanness of device has been improved, the leakproofness and the stability of device have been improved simultaneously.

Drawings

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

FIG. 2 is a schematic top sectional view of a portion of the present invention;

fig. 3 is an enlarged view of the structure at a in fig. 1 according to the present invention.

In the figure: 1. a device main body; 2. fastening a bolt; 3. a pipeline; 4. a circular plate; 5. a vertical rod; 6. a rubber cushion; 7. a limiting block; 8. a limiting groove; 9. a first spring; 10. a cover body; 11. a sealing plate; 12. fixing grooves; 13. an opening; 14. a movable plate; 15. a card slot; 16. a second spring; 17. a piston rod; 18. and a support plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, an embodiment of the present invention is shown:

the utility model provides a vacuum negative pressure relief valve, including device main part 1, fastening bolt 2 and 3 threaded connection of pipeline are passed through to the lower extreme of device main part 1, the inner wall of device main part 1 is provided with the inside convex lug, and the lug is installed at the lower extreme of closing plate 11, can play the effect of supporting closing plate 11, cooperation fixed slot 12 simultaneously, can fix closing plate 11 at the inner wall of device main part 1, thereby make the lower extreme of device main part 1 form a sealed cavity, the lower extreme outer wall of device main part 1 has cup jointed circular slab 4, the lower extreme fixed mounting of circular slab 4 has montant 5.

The outer wall of the vertical rod 5 is fixedly provided with a limiting block 7, the limiting block 7 is embedded into the inner wall of the limiting groove 8, the limiting groove 8 is arranged on the inner wall of the lower end of the device main body 1, the limiting block 7 is fixedly connected with the inner wall of the limiting groove 8 through a first spring 9, the vertical rod 5 can be extruded downwards all the time, the sealing performance between the device main body 1 and the pipeline 3 is better, the problem that gas can directly enter the pipeline 3 through a gap between the device main body 1 and the pipeline 3, so that the safety protection effect cannot be achieved is solved, the sealing performance of the device is improved, meanwhile, the vertical rod 5 is matched, the device main body 1 can be kept in a vertical state all the time when being installed at the upper end of the pipeline 3, the device main body 1 is prevented from being installed vertically, a second spring 16 can be clamped, so that the protection effect cannot be achieved, and the stability, the lower extreme of montant 5 passes the lower extreme of device main part 1, and the lower extreme fixed mounting of montant 5 has rubber cushion 6, and the lower extreme of rubber cushion 6 laminates with the upper end of pipeline 3.

The upper end outer wall and the 10 threaded connection of lid of device main part 1, closing plate 11 is installed to the inner wall of device main part 1, convex fixed block is evenly installed to the outer wall of closing plate 11, and the outer wall size of fixed block is the same with the size of fixed slot 12 upper end inner wall, can imbed closing plate 11 in the inner wall of fixed slot 12, thereby the convenience is installed and is dismantled closing plate 11, while can also avoid traditional when passing through the bolt fastening, long-term after using, the bolt can produce not hard up, thereby can lead to the phenomenon of gas leakage at the in-process that uses, cause the problem of device damage, the stability and the leakproofness of device have been improved.

The week side embedding of closing plate 11 is at the inner wall of fixed slot 12, the lower extreme of closing plate 11 and the laminating of fly leaf 14, the lower extreme embedding of fly leaf 14 is at the inner wall of draw-in groove 15, through second spring 16 fixed connection between the inner wall of fly leaf 14 and draw-in groove 15, the inner wall at device main part 1 is seted up to draw-in groove 15, can cooperate with fixed slot 12, when fixing closing plate 11, can also avoid outside gas directly to enter into the cavity that device main part 1 lower extreme formed through the gap between closing plate 11 and the fixed slot 12, thereby lead to the device can not play the problem of guard action, the leakproofness and the stability of device have been improved.

The fixed slot 12 is seted up on the lug of device main part 1 inner wall, and the lower extreme of fixed slot 12 sets up to the annular, can imbed closing plate 11 in the inner wall of fixed slot 12, then through rotating closing plate 11, make closing plate 11 imbed in the ring channel of fixed slot 12 lower extreme, thereby fix closing plate 11, when having avoided producing the problem between closing plate 11 and second spring 16, closing plate 11 dismantles very trouble problem, made things convenient for to install and dismantle closing plate 11, the cost of maintenance of device has been reduced, the life of device has been improved, install vertical piston rod 17 that passes opening 13 on closing plate 11, opening 13 is seted up at closing plate 11's intermediate position, the outer wall fixed mounting of piston rod 17 has backup pad 18, the lower extreme fixed mounting of backup pad 18 is in the upper end of closing plate 11.

The working principle is as follows: when the apparatus body 1 is mounted. First, the apparatus body 1 is placed on the pipe 3 to be installed, and then the fastening bolt 2 is turned so that the fastening bolt 2 is installed to the upper end of the pipe 3, and the vertical rod 5 is pressed by the pipe 3 when the apparatus body 1 is installed. Thereby make montant 5 drive stopper 7 upwards to slide, stopper 7 upwards slides to extrude first spring 9, make first spring 9 take place elastic deformation, because circular slab 4 level is fixed in the upper end of montant 5, so the lower extreme of montant 5 can remain parallel throughout, thereby install the back with device main part 1, device main part 1 can remain vertical state throughout.

When water drops are generated between the piston rod 17 and the sealing plate 11, the cover body 10 can be rotated, the upper end of the device body 1 of the cover body 10 is separated, then the sealing plate 11 is rotated, the sealing plate 11 rotates in the annular groove at the lower end of the fixing groove 12 until the fixing block on the peripheral side of the sealing plate 11 corresponds to the groove at the upper end of the fixing groove 12, due to the fact that the upper end of the sealing plate 11 does not have the effect of extrusion force, the second spring 16 restores elastic deformation, the movable plate 14 slides upwards to extrude the sealing plate 11, the sealing plate 11 is separated from the inner wall of the fixing groove 12, the whole sealing plate 11 is detached, the sealing plate 11 and the piston rod 17 are cleaned and wiped, and finally, the operation is repeated, and the sealing.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. Vacuum negative pressure relief valve, including device main part (1), its characterized in that: the lower end of the device main body (1) is in threaded connection with the pipeline (3) through a fastening bolt (2), the outer wall of the lower end of the device main body (1) is sleeved with a circular plate (4), a vertical rod (5) is fixedly installed at the lower end of the circular plate (4), the lower end of the vertical rod (5) penetrates through the lower end of the device main body (1), a rubber cushion (6) is fixedly installed at the lower end of the vertical rod (5), the lower end of the rubber cushion (6) is attached to the upper end of the pipeline (3), the outer wall of the upper end of the device main body (1) is in threaded connection with a cover body (10), a sealing plate (11) is installed on the inner wall of the device main body (1), the peripheral side of the sealing plate (11) is embedded into the inner wall of a fixing groove (12), a piston rod (17) vertically penetrating through an opening (13) is installed on the sealing plate (11), the outer wall of the piston rod (17) is fixedly provided with a supporting plate (18), and the lower end of the supporting plate (18) is fixedly arranged at the upper end of the sealing plate (11).

2. The vacuum relief valve of claim 1, wherein: the inner wall of the device main body (1) is provided with a convex block which protrudes inwards, and the convex block is arranged at the lower end of the sealing plate (11).

3. The vacuum relief valve of claim 1, wherein: the outer wall fixed mounting of montant (5) has stopper (7), stopper (7) embedding is at the inner wall of spacing groove (8), the lower extreme inner wall at device main part (1) is seted up in spacing groove (8), through first spring (9) fixed connection between the inner wall of stopper (7) and spacing groove (8).

4. The vacuum relief valve of claim 1, wherein: the lower extreme and the fly leaf (14) laminating of closing plate (11), the lower extreme embedding of fly leaf (14) is at the inner wall of draw-in groove (15), through second spring (16) fixed connection between the inner wall of fly leaf (14) and draw-in groove (15), draw-in groove (15) are seted up at the inner wall of device main part (1), can cooperate with fixed slot (12).

5. The vacuum relief valve of claim 1, wherein: the outer wall of closing plate (11) is evenly installed convex fixed block, and the outer wall size of fixed block is the same with the size of fixed slot (12) upper end inner wall.

6. The vacuum relief valve of claim 1, wherein: the fixing groove (12) is formed in the protruding block of the inner wall of the device body (1), and the lower end of the fixing groove (12) is annular.