CN219796466U

CN219796466U - Safety valve

Info

Publication number: CN219796466U
Application number: CN202321107327.XU
Authority: CN
Inventors: 项乾; 顾海峰; 李艾梅
Original assignee: Yancheng Precision Casting Co ltd
Current assignee: Yancheng Precision Casting Co ltd
Priority date: 2023-05-10
Filing date: 2023-05-10
Publication date: 2023-10-03
Anticipated expiration: 2033-05-10

Abstract

The utility model relates to a safety valve, which comprises a communication pipeline, wherein the upper end of the communication pipeline is provided with a valve body, the valve body is mutually matched with the communication pipeline, the valve body is provided with an upper flange, the communication pipeline is provided with a lower flange matched with the upper flange, the upper flange is connected with the lower flange through bolts, the outer end of the upper flange is fixedly connected with a connecting block, the lower flange is provided with a connecting frame matched with the connecting block, the connecting block is provided with a fixing pin matched with the connecting frame, the upper end of the valve body is provided with an adjusting nut, a valve cap is arranged above the valve body, the valve body is provided with a threaded wall matched with the valve cap, the equipment is stable in connecting structure and convenient for long-term use, the sealing structure is protected, the long-term use stability is ensured, the exposed adjusting structure is protected, and the normal operation of the functions of the equipment is ensured.

Description

Safety valve

Technical Field

The utility model relates to the technical field of valves, in particular to a safety valve.

Background

The safety valve is a special equipment for overpressure protection of pressure system, its opening and closing member is in normally closed state under the action of external force, when the pressure of medium in equipment or pipeline is raised, and exceeds a defined value, the opening and closing member is automatically opened, and the medium is discharged to outside of system so as to prevent the medium pressure in system from exceeding a predefined safety value, after the pressure is recovered to normal, the opening and closing member is automatically closed so as to prevent the medium in the interior from continuously flowing out.

The existing safety valve mounting structure is single, generally, can cooperate through the flange to be connected, fix through common bolt, but the safety valve is as a valve, the during operation can bear great pressure, and the flow direction of medium is the same with the fixed direction of bolt, along with the extension of operating time, the safety valve receives the thrust of separation direction for a long time, fixing bolt can become loose, make the connection between safety valve and the pipeline become loose, need often overhaul, and the untimely outflow that probably leads to the medium of discovery, cause the loss, if the medium contains the pollutant, still can pollute the environment, and in the connection cooperation between the flange, generally, can seal the junction through the sealing washer, guarantee the stability of medium transportation, but the operational environment of some safety valves is in the outdoor, bad weather often appears in the external environment, the anticorrosive of sealing washer, receive bad weather to influence and damage easily, the medium of transmission has corrosivity, then the life of sealing washer can further shorten, increase the risk of medium reveal, in addition, have the valve rod that is used for adjusting the pressure preset value in the present valve rod, through rotating the adjusting structure of valve rod upper end, thereby change the pressure of inside spring, the pressure of adjusting valve rod is the valve rod has the normal, the pollution is all exposed outside the valve rod, the normal, the long-term is polluted outside the normal, and can be polluted outside the outdoor, and cause the dust is polluted, and accumulated under the normal condition, and long-term.

Disclosure of Invention

(one) solving the technical problems

Aiming at the defects of the prior art, the utility model provides a safety valve to solve the problems that the common safety valve in the background art is simple in structure, easy to damage after long-term use and incapable of being used normally.

(II) technical scheme

In order to achieve the above object, the present utility model provides the following technical solutions: the utility model provides a relief valve, includes the communication pipeline, the communication pipeline upper end is equipped with the valve body, the valve body is mutually supported with the communication pipeline, be equipped with the flange on the valve body, be equipped with on the communication pipeline with last flange complex lower flange, go up flange and lower flange and pass through bolted connection, it is equipped with the connecting block to go up flange outer end fixed connection, be equipped with on the lower flange with connecting block complex connecting frame, be equipped with on the connecting block with connecting frame complex fixed pin, valve body upper end is equipped with adjusting nut, valve body top is equipped with the valve cap, be equipped with on the valve body with valve cap complex screw thread wall.

Preferably, a sealing ring is arranged between the upper flange and the lower flange, and anti-corrosion layers are arranged at the upper end and the lower end of the sealing ring respectively, so that a high-performance sealing structure is provided, and the stable operation of the safety valve is ensured.

In a further preferred embodiment, the anticorrosive layer includes a fluororubber layer, the fluororubber layer contacts with the sealing ring, a nitrile rubber layer is arranged on one side of the fluororubber layer, a chlorohydrin rubber layer is arranged on one side of the nitrile rubber layer, a fluorocarbon coating is arranged on one side of the chlorohydrin rubber layer, and the protective capability is improved, so that the complex working environment is adapted.

In a further preferred embodiment, the two ends of the connecting block are respectively provided with a sliding groove, the fixed pin is slidably connected with the sliding grooves, and the connecting frame is provided with a pin groove matched with the fixed pin, so that the fixing is convenient.

In a further preferred embodiment, a thrust spring is disposed in the sliding groove, the thrust spring is located between the inner wall of the sliding groove and the fixing pin, the fixing pin is fixedly connected with a pushing block, and the connecting block is provided with a pushing groove matched with the pushing block, so that the operation is more convenient, and the installation of workers is facilitated.

In a further preferred embodiment, the valve body is provided with a protective cover, the protective cover is matched with the upper flange and the lower flange, the protective cover is in sliding fit with the valve body, the lower end of the protective cover is provided with a bottom sealing strip, the bottom sealing strip is made of elastic materials, the connecting structure is protected, and normal operation of the structure is guaranteed.

In a further preferred mode, the valve cap is provided with an observation port, a perspective shell is arranged in the observation port, and the state of the safety valve is conveniently observed and is convenient to use.

(III) beneficial effects

Compared with the prior art, the utility model provides a safety valve, which has the following beneficial effects:

1. according to the utility model, the upper flange and the lower flange are matched for the communication of the valve body and the communicating pipeline, the upper flange and the lower flange are fixed through bolts, the connecting block, the connecting frame and the fixing pin are also matched, the fixing pin is transversely positioned in the connecting block and the connecting frame, a fixing structure perpendicular to the flowing direction of a medium is provided, the structure is not influenced by the pressure of the medium, the looseness caused by the pressure pushing of the medium is avoided, and the safety valve is ensured to be in a long-term stable working state.

2. Through setting up anticorrosive coating and sealing washer cooperation, when the sealing washer provides sealing capability, protect the sealing washer, provide high temperature resistant, radiation resistant and acid and alkali resistant protection effect through fluororubber layer, through the nitrile rubber layer through resistant oil, wear-resisting, ageing resistant protection effect, provide corrosion-resistant ability through the chlorohydrin rubber layer, provide wear-resisting and anti-adhesion's effect through the fluorocarbon coating, guarantee the steady operation of sealing washer, provide the life of sealing washer, make relief valve job stabilization.

3. Through setting up the valve cap and cover valve body upper end, through screw thread wall and valve cap cooperation, make things convenient for the installation and the dismantlement of valve cap, protect valve body upper end and valve rod upper end complex adjusting nut through the valve cap, avoid the valve rod to receive external environment's influence with the cooperation structure of valve body, guarantee adjusting structure's stability, guarantee the normal use to equipment regulation.

Drawings

FIG. 1 is a schematic diagram of a front structure of a safety valve according to the present utility model;

FIG. 2 is a schematic diagram of the mating structure between the communication pipe, the valve body and the valve cap of the present utility model;

FIG. 3 is a schematic diagram showing the cooperation structure of the communication pipeline and the valve body in the utility model;

FIG. 4 is a schematic diagram of the fit structure between the upper flange, the lower flange and the seal ring in the present utility model;

FIG. 5 is a schematic diagram of the structure of the upper flange and the lower flange of the present utility model in a separated and matched manner;

FIG. 6 is a cross-sectional view of the internal structure of the connecting block of the present utility model;

FIG. 7 is a cross-sectional view of the inner structure of the anticorrosive coating according to the utility model;

FIG. 8 is a schematic view of the bottom structure of the protective cover of the present utility model.

In the figure: 1. a communication pipe; 2. a valve body; 3. an upper flange; 4. a lower flange; 5. a connecting block; 6. a connection frame; 7. a fixing pin; 8. an adjusting nut; 9. a valve cap; 10. a threaded wall; 11. a seal ring; 12. an anti-corrosion layer; 13. a fluororubber layer; 14. a nitrile rubber layer; 15. a chloroether rubber layer; 16. a fluorocarbon coating; 17. a sliding groove; 18. a pin slot; 19. a thrust spring; 20. a pushing block; 21. a pushing groove; 22. a protective cover; 23. a bottom sealing strip; 24. an observation port; 25. and (5) perspective the shell.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1:

referring to fig. 1, 2, 3 and 5, a safety valve comprises a communication pipeline 1, wherein a valve body 2 is arranged at the upper end of the communication pipeline 1, the valve body 2 is mutually matched with the communication pipeline 1, an upper flange 3 is arranged on the valve body 2, a lower flange 4 matched with the upper flange 3 is arranged on the communication pipeline 1, the upper flange 3 is connected with the lower flange 4 through bolts, a connecting block 5 is fixedly connected with the outer end of the upper flange 3, a connecting frame 6 matched with the connecting block 5 is arranged on the lower flange 4, a fixing pin 7 matched with the connecting frame 6 is arranged on the connecting block 5, an adjusting nut 8 is arranged at the upper end of the valve body 2, a valve cap 9 is arranged above the valve body 2, and a threaded wall 10 matched with the valve cap 9 is arranged on the valve body 2.

Referring to fig. 4 and 7, in this embodiment, a sealing ring 11 is disposed between an upper flange 3 and a lower flange 4, two ends of the sealing ring 11 are respectively provided with an anti-corrosion layer 12, the anti-corrosion layer 12 includes a fluororubber layer 13, the fluororubber layer 13 contacts with the sealing ring 11, a nitrile rubber layer 14 is disposed on one side of the fluororubber layer 13, a chlorohydrin rubber layer 15 is disposed on one side of the nitrile rubber layer 14, a fluorocarbon coating 16 is disposed on one side of the chlorohydrin rubber layer 15, sealing capability is provided by the sealing ring 11, internal communication with the outside is avoided, high temperature resistance, radiation resistance and acid and alkali resistance are provided by the fluororubber layer 13, oil resistance, wear resistance and aging resistance are provided by the nitrile rubber layer 14, and further air tightness is provided by the chlorohydrin rubber layer 15, the sealing gasket and the connecting structure are protected, transportation stability of the safety valve is ensured, wear resistance and adhesion resistance are provided by the fluorocarbon coating 16, and the anti-corrosion layer 12 contacts with the corresponding upper flange 3 and lower flange 4 are stable.

Referring to fig. 4-6, in this embodiment, two ends of the connection block 5 are respectively provided with a sliding groove 17, the fixing pin 7 is slidably connected with the sliding groove 17, the connection frame 6 is provided with a pin groove 18 matched with the fixing pin 7, a thrust spring 19 is arranged in the sliding groove 17, the thrust spring 19 is located between the inner wall of the sliding groove 17 and the fixing pin 7, the fixing pin 7 is fixedly connected with a pushing block 20, the connection block 5 is provided with a pushing groove 21 matched with the pushing block 20, the pushing block 20 slides in the pushing groove 21 through moving the pushing block 20 to drive the fixing pin 7 to move, the fixing pin 7 slides into the pin groove 18 completely, the connection block 5 is inserted into the connection frame 6 to align the sliding groove 17 with the pin groove 18, the pushing block 20 is released, the fixing pin 7 is pushed to slide outside the sliding groove 17 under the action of the thrust spring 19, the front end of the fixing pin 7 is inserted into the pin groove 18, and the connection block 5 and the connection frame 6 are fixed together through the fixing pin 7.

Referring to fig. 1 and 8, in this embodiment, a protection cover 22 is disposed on a valve body 2, the protection cover 22 is matched with an upper flange 3 and a lower flange 4, the protection cover 22 is slidably matched with the valve body 2, a bottom sealing strip 23 is disposed at the lower end of the protection cover 22, the bottom sealing strip 23 is made of elastic material, when the upper flange 3 and the lower flange 4 are connected, the protection cover 22 is slid down after the upper flange 3 and the lower flange 4 are connected and fixed, the protection cover 22 covers the upper flange 3, the lower flange 4, the connecting block 5 and the connecting frame 6, and when the protection cover 22 is slid down, the bottom sealing strip 23 is pulled outwards, the bottom sealing strip 23 is not contacted with the upper flange 3, the movement of the protection cover 22 is not influenced, after the protection cover 22 is tightly adhered to the upper flange 3, the bottom sealing strip 23 is loosened, the elastic material of the bottom sealing strip 23 is recovered to be in contact with the lower flange 4 and the connecting frame 6, and the protection of the upper flange 3, the lower flange 4, the connecting block 5 and the connecting frame 6 is prevented from moving.

Referring to fig. 1-3, in this embodiment, an observation port 24 is formed in the valve cap 9, a perspective shell 25 is disposed in the observation port 24, the state of the adjusting nut 8 in the valve cap 9 is observed through the observation port 24 through the perspective shell 25, the state of the safety valve pressure value is conveniently judged, the observation port 24 is blocked by the perspective shell 25, and the perspective shell 25 is matched with the valve cap 9 to protect the internal space and parts.

Example 2:

referring to fig. 1 to 8, when the apparatus is used, the safety valve is installed on the communication pipe 1, the upper flange 3 is aligned with the lower flange 4, the connection block 5 is inserted into the corresponding connection frame 6, the upper flange 3 and the lower flange 4 are fixedly connected through bolts, wherein the bolts are of a common fixed structure, the cooperation mode with the flanges belongs to a common pipe communication apparatus, the specific structure and principle method are not described in detail herein, when the connection block 5 and the connection frame 6 are installed, the pushing block 20 is moved to slide in the pushing groove 21 to drive the fixing pin 7 to move, the fixing pin 7 is completely slid into the pin groove 18 to prevent the fixing pin 7 from interfering with the connection block 5 to be inserted into the connection frame 6, after the connection block 5 is inserted into the connection frame 6, the sliding groove 17 is aligned with the pin groove 18, then the pushing block 20 is released, after restriction is lost, the elastic spring is stretched, the fixing pin 7 is pushed by the pushing force spring 19 to slide to the outside of the sliding groove 17, the front end of the fixing pin 7 is inserted into the pin groove 18, the connecting block 5 and the connecting frame 6 are fixed together through the fixing pin 7, in addition, before the upper flange 3 and the lower flange 4 are connected, the protecting cover 22 is slid upwards to avoid influencing the installation, after the upper flange 3 and the lower flange 4 are connected and fixed, the protecting cover 22 is slid down, the protecting cover 22 covers the upper flange 3, the lower flange 4, the connecting block 5 and the connecting frame 6, and when the protecting cover 22 is slid down, the bottom sealing strip 23 is pulled outwards, the bottom sealing strip 23 is not contacted with the upper flange 3, the protecting cover 22 is not influenced to move, after the protecting cover 22 is tightly adhered to the upper flange 3, the bottom sealing strip 23 is loosened, the elastic material of the bottom sealing strip 23 can be restored, at the moment, the bottom sealing strip 23 is contacted with the lower flange 4 and the connecting frame 6, the protection cover 22 is prevented from moving, the back cover strip 23 is matched with the protection cover 22, the upper flange 3, the lower flange 4, the connecting block 5 and the connecting frame 6 are wrapped, the matched connection structure is protected, when the safety valve works, besides the fixing capability of bolts on the upper flange 3 and the lower flange 4, the fixing pin 7 also provides the fixing capability for the upper flange 3 and the lower flange 4, the fixing direction of the fixing pin 7 is perpendicular to the pressure direction of the valve body 2 under long-term pressure and vibration, the affected pin is received, the front end of the fixing pin 7 is located in the pin groove 18 under the action of the thrust spring 19, the possibility of looseness does not exist, and stable matching between the valve body 2 and the communication pipeline 1 is ensured.

Example 3:

referring to fig. 1 to 7, based on the above-described embodiment 2, when the upper flange 3 and the lower flange 4 are installed, the gasket 11 is placed between the upper flange 3 and the lower flange 4, bolts are passed through the gasket 11, the gasket 11 is fixed between the upper flange 3 and the lower flange 4, after the upper flange 3 and the lower flange 4 are connected, the gasket 11 provides sealing ability under the pressure of the upper flange 3 and the lower flange 4, the inside of the junction of the valve body 2 and the communication pipe 1 is prevented from communicating with the outside, the stability of the valve body is ensured, and the effects of high temperature resistance, radiation resistance and acid and alkali resistance are provided through the fluororubber layer 13, the effects of oil resistance, wear resistance and aging resistance are provided through the nitrile rubber layer 14, and further the air tightness is provided, the gasket and the connection structure are protected through the effect of the chlorohydrin rubber layer 15, the effects of wear resistance and adhesion resistance are provided through the fluorocarbon coating 16, the anti-corrosion layer 12 is contacted with the corresponding upper flange 3 and lower flange 4 stably, the connection sealing capability between the upper flange 3 and the lower flange 4 is kept stable under the external weather environment, the transportation stability of the safety valve is ensured, in addition, the valve cap 9 is positioned at the upper end of the valve body 2, the adjusting nut 8 is covered, the adjusting nut 8 and related structures are protected, wherein the adjusting nut 8 is a part of the valve body 2 and is used for adjusting the pressure of the spring in the valve body 2, thus adjusting different thresholds, the structure and principle in the valve body 2 are not different from those of the safety valve commonly used in the market, the internal structure and the using method are not repeated here, some safety valves in the market are provided with reading devices and can also be placed in the valve cap 9 for protection, the state of the adjusting nut 8 or other devices in the valve cap 9 is observed through the perspective shell 25, the state of relief valve pressure value is conveniently judged, and perspective shell 25 optional plastics or glass material is plugged up with viewing aperture 24, and with the cooperation of valve cap 9 protect inside space and part, rotate valve cap 9 and dismantle it, can adjust adjusting nut 8, accomplish the regulation after, install valve cap 9 on valve body 2, install fixedly through screw thread wall 10 and valve cap 9 cooperation.

In all the above mentioned solutions, in which the connection between two components can be chosen according to the actual situation, a welded, bolt-and-nut-fitted connection, a bolt-or-screw connection or other known connection means, which are not described in detail herein, where reference is made to a written fixed connection, the preferred consideration is welding, although embodiments of the utility model have been shown and described, it will be understood by those skilled in the art that numerous variations, modifications, substitutions and alterations can be made to these embodiments without departing from the principle and spirit of the utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. The utility model provides a relief valve, includes communicating pipe (1), communicating pipe (1) upper end is equipped with valve body (2), valve body (2) mutually support with communicating pipe (1), its characterized in that: be equipped with flange (3) on valve body (2), be equipped with on communicating pipeline (1) with flange (3) complex lower flange (4), go up flange (3) and lower flange (4) through bolted connection, go up flange (3) outer end fixed connection and be equipped with connecting block (5), be equipped with on lower flange (4) with connecting block (5) complex connecting frame (6), be equipped with on connecting block (5) with connecting frame (6) complex fixed pin (7), valve body (2) upper end is equipped with adjusting nut (8), valve body (2) top is equipped with valve cap (9), be equipped with on valve body (2) with valve cap (9) complex screw thread wall (10).

2. A safety valve according to claim 1, wherein: a sealing ring (11) is arranged between the upper flange (3) and the lower flange (4), and anti-corrosion layers (12) are arranged at the upper end and the lower end of the sealing ring (11).

3. A safety valve according to claim 2, wherein: the anti-corrosion layer (12) comprises a fluororubber layer (13), the fluororubber layer (13) is in contact with the sealing ring (11), a nitrile rubber layer (14) is arranged on one side of the fluororubber layer (13), a chlorohydrin rubber layer (15) is arranged on one side of the nitrile rubber layer (14), and a fluorocarbon coating (16) is arranged on one side of the chlorohydrin rubber layer (15).

4. A safety valve according to claim 1, wherein: the two ends of the connecting block (5) are respectively provided with a sliding groove (17), the fixed pin (7) is in sliding connection with the sliding grooves (17), and the connecting frame (6) is provided with a pin groove (18) matched with the fixed pin (7).

5. A safety valve according to claim 4, wherein: the sliding groove (17) is internally provided with a thrust spring (19), the thrust spring (19) is positioned between the inner wall of the sliding groove (17) and the fixed pin (7), the fixed pin (7) is fixedly connected with a pushing block (20), and the connecting block (5) is provided with a pushing groove (21) matched with the pushing block (20).

6. A safety valve according to claim 1, wherein: the valve is characterized in that a protective cover (22) is arranged on the valve body (2), the protective cover (22) is matched with the upper flange (3) and the lower flange (4), the protective cover (22) is in sliding fit with the valve body (2), a bottom sealing strip (23) is arranged at the lower end of the protective cover (22), and the bottom sealing strip (23) is made of elastic materials.

7. A safety valve according to claim 1, wherein: an observation port (24) is formed in the valve cap (9), and a perspective shell (25) is arranged in the observation port (24).