CN114233903A - Hierarchical relief valve is used in oil production - Google Patents
Hierarchical relief valve is used in oil production Download PDFInfo
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- CN114233903A CN114233903A CN202111322441.XA CN202111322441A CN114233903A CN 114233903 A CN114233903 A CN 114233903A CN 202111322441 A CN202111322441 A CN 202111322441A CN 114233903 A CN114233903 A CN 114233903A
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- valve body
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- spring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to the technical field of petroleum production equipment, in particular to a grading safety valve for petroleum production, which comprises a valve body, wherein the right side of the valve body is fixedly connected with a pressure relief pipe, a piston is connected in the valve body in a sliding manner, the upper end of the piston is fixedly connected with a supporting rod, the rod wall of the supporting rod is sleeved with a first spring, the valve body is provided with a continuous pressure relief mechanism, the continuous pressure relief mechanism comprises a liquid storage bin, a thread groove, a one-way bearing and a baffle blade, the liquid storage bin is fixedly connected to the upper end of the valve body, the thread groove is formed in the position, close to the upper end, of the rod wall of the supporting rod, the one-way bearing is rotatably connected to the inner center of the liquid storage bin, the piston can be slowly closed after the valve body is opened through the continuous pressure relief mechanism, and therefore, the opening and closing times of the piston are reduced when petroleum with unstable pressure is transported, the mechanical loss of the piston is reduced, the service life of the valve body is prolonged, and the practicability of the device is improved.
Description
Technical Field
The invention relates to the technical field of petroleum production equipment, in particular to a grading safety valve for petroleum production.
Background
As is well known, petroleum equipment plays an important role in the petroleum industry, because of the particularity of petroleum, a large number of various valves are needed in the production process of petroleum, safety valves are generally used in the production process of petroleum and used for guaranteeing safety, and in the aspect of safety valves, the main function of the safety valves is pressure relief to protect the equipment.
The present invention relates to a safety valve of the prior art (CN 108431471B), and more particularly, to a safety valve having a simple device structure and a valve body that is automatically and appropriately operated by gas pressure, and a device including the safety valve. In the valve body 4, the pressure of the gas flowing in from the valve hole 2j is received by the first pressure receiving surface portion 4f in the valve-opened state, and the valve body is smoothly opened, and at the opening position after the valve is opened, the pressure receiving area is increased to the second pressure receiving surface portion 4g, and the first pressure receiving surface portion 4f and the second pressure receiving surface portion 4g are surrounded by the peripheral wall portion 4c formed on the inner surface of the valve body 4.
Just can open the relief valve when reaching the pressure of settlement in above-mentioned case, but in the oil transportation, often can lead to the pressure of oil to fluctuate because of many factors, then can lead to the relief valve to be in the state of opening repeatedly in the pipe wall like this, has certain influence to the life-span of relief valve like this, does not have the practicality:
therefore, a grading safety valve for petroleum production is provided.
Disclosure of Invention
The invention aims to provide a grading safety valve for petroleum production, which can slowly close a piston after a valve body is opened through a continuous pressure relief mechanism, so that the opening and closing times of the piston are reduced, the mechanical loss of the piston is reduced, the service life of the valve body is prolonged, and the practicability of the device is improved in the process of petroleum transportation with unstable pressure, so that the problems in the background art are solved.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a hierarchical relief valve is used in oil production, includes the valve body, the right side fixedly connected with pressure release pipe of valve body, the inside sliding connection of valve body has the piston, the upper end fixedly connected with bracing piece of piston, the pole wall of bracing piece has cup jointed first spring, being equipped with of valve body lasts pressure release mechanism.
When the pressure of the pipeline of carrying oil increased, oil was the piston upwards top this moment, and the piston drove bracing piece rebound and compress first spring this moment, and oil carries out the pressure release through the pressure release pipe this moment, can open the back at the valve body through lasting pressure release mechanism, and slow is closed the piston, like this in the unstable oil transportation of some pressure, has reduced opening and the closed number of times of piston.
Preferably, last pressure release mechanism includes stock solution storehouse, non-Newton liquid, thread groove, one-way bearing and fender leaf, stock solution storehouse fixed connection is in the upper end of valve body, the thread groove is seted up in the pole wall of bracing piece and is close to the position of upper end, one-way bearing rotates the inside center department of connecting in stock solution storehouse, fender leaf fixed connection is in one-way bearing's the left and right sides, non-Newton liquid is placed in the inside in stock solution storehouse, the outside of thread groove and one-way bearing's inside screw drive.
When the bracing piece rebound, one-way bearing is in the rotation of activity this moment, so can not lead to one-way bearing to rotate when moving on the thread groove of seting up on the bracing piece, it explains very much here, when the pressure release to a definite value, this moment under the effect of first spring, the piston rebound, the piston drives the bracing piece rebound this moment, the bracing piece is to when moving, one-way bearing is in the dead state of lock this moment, the one-way bearing that beats when the thread groove rebound this moment rotates, one-way bearing rotates and drives the fender leaf and rotate, when fender leaf rotates, the dress can produce certain reaction force at the inside non-Newton liquid of stock solution storehouse, block the fender leaf and rotate, lead to bracing piece pivoted speed to descend like this, also can make the decline of bracing piece slow like this, make the time length of side of pressure release like this.
Preferably, the inside upper end threaded connection of bracing piece has first threaded rod, the rectangle opening has been seted up in the inside center department of bracing piece, the lower extreme of first threaded rod rotates and is connected with the horizontal pole, the lower extreme of horizontal pole contacts with the upper end of first spring, the upper end fixedly connected with knob of first threaded rod.
At the extrusion and the reseing that first spring relapse, the elastic coefficient of first spring can receive certain influence, drive first threaded rod through rotating the knob this moment and rotate, first threaded rod rotates and makes it can reciprocate for the bracing piece, the bracing piece drives the horizontal pole this moment and reciprocates, can adjust the former length of first spring when the horizontal pole reciprocates, through the regulation to first spring, the loss energy when can compensateing the long-term use of first spring, manual pressure release pressure to the valve body like this.
Preferably, the lower extreme of piston is rotated and is connected with the second threaded rod, the inner wall of valve body is close to the position fixedly connected with filter screen of lower extreme, the lower extreme center department of filter screen rotates and is connected with first nut, the inside of first nut and the pole wall screw drive of second threaded rod, the equal fixedly connected with scraper blade of the left and right sides of first nut.
Oil is in the transportation, and inside has some impurity tiny particle, can influence the leakproofness of piston like this, filters the impurity in the oil through the filter screen this moment, drives second threaded rod rebound this moment in piston rebound, and the second threaded rod is when reciprocating, makes to rotate the first nut of connection on the filter screen and takes place to rotate, drives two fixed connection's scraper blade rotation when first nut rotates, gets rid of the impurity granule on filter screen surface when the scraper blade rotates.
Preferably, the cavity is formed in the lower end of the interior of the valve body, the second spring is fixedly connected to the left side of the cavity, the baffle is fixedly connected to the right side of the second spring, and the dirt collecting box is sleeved at the lower end of the valve body.
After the scraper blade strikes off impurity granule from the filter screen, impurity granule falls to the inside of long-pending dirty box, and after a terminal time, when getting rid of long-pending dirty box, the inside second spring of cavity promotes the baffle left this moment, seals the lower extreme of valve body like this.
Preferably, the lower extreme of baffle is the slope design, the upper end of long-pending dirty box is the slope design.
Can be more convenient when the dirt box is taken out again.
Preferably, the right side fixedly connected with sawtooth pole of piston, the inner wall left side fixed connection montant of pressure release pipe, the center department of montant rotates and is connected with clean pole, the left side fixedly connected with gear of clean pole, the outside of gear is connected in the sawtooth pole meshing.
After the scraper blade strikes off impurity granule from the filter screen, impurity granule falls to the inside of long-pending dirty box, and after a terminal time, when getting rid of long-pending dirty box, the inside second spring of cavity promotes the baffle left this moment, seals the lower extreme of valve body like this, avoids a large amount of oil to spill, can not need get rid of the cleanness with long-pending dirty box under the condition of exhausting the inside oil of valve body like this.
Preferably, the inner wall surface of the valve body is coated with a corrosion resistant film.
The damage of corrosive substances contained in the petroleum to the valve body is avoided.
Compared with the prior art, the invention has the beneficial effects that:
1. the piston can be slowly closed after the valve body is opened through the continuous pressure relief mechanism, so that the opening and closing times of the piston are reduced, the mechanical loss of the piston is reduced, the service life of the valve body is prolonged, and the practicability of the device is improved in the process of oil transportation with unstable pressure;
2. the former length of first spring can be adjusted when the horizontal pole reciprocates, through the regulation to first spring, loss energy when can compensateing the long-term use of first spring, and manual pressure release pressure to the valve body has increased the device's practicality like this.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of a front plan view of the present invention;
FIG. 3 is an enlarged view taken at A of FIG. 2 in accordance with the present invention;
FIG. 4 is an enlarged view of the invention at B of FIG. 2;
FIG. 5 is a schematic view of a support bar according to the present invention;
fig. 6 is a schematic view of the cross bar structure of the present invention.
In the figure: 1. a valve body; 2. a thread groove; 3. a first spring; 4. a support bar; 5. a piston; 6. a pressure relief pipe; 7. a continuous pressure relief mechanism; 8. a vertical rod; 9. a cleaning rod; 10. a serrated bar; 11. a gear; 12. a dirt accumulation box; 13. a first threaded rod; 14. a knob; 15. a liquid storage bin; 16. a one-way bearing; 17. blocking the leaf; 18. a cross bar; 19. a non-Newtonian liquid; 20. A second spring; 21. a baffle plate; 22. a cavity; 23. a second threaded rod; 24. filtering with a screen; 25. a first nut; 26. a squeegee; 27. a rectangular opening.
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 to 6, the present invention provides a technical solution:
a grading safety valve for petroleum production, as shown in fig. 1 to 4, comprising a valve body 1, wherein a pressure relief pipe 6 is fixedly connected to the right side of the valve body 1, a piston 5 is slidably connected inside the valve body 1, a support rod 4 is fixedly connected to the upper end of the piston 5, a first spring 3 is sleeved on the rod wall of the support rod 4, and a continuous pressure relief mechanism 7 is arranged on the valve body 1;
the during operation, when the pressure increase of the pipeline of carrying oil, oil was moved piston 5 top upwards this moment, piston 5 drove bracing piece 4 and upwards removed and compress first spring 3 this moment, oil carries out the pressure release through pressure release pipe 6 this moment, can open the back at valve body 1 through lasting pressure release mechanism 7 mechanism, slowly carry out the closure with piston 5, in the time of the unstable oil transportation of some pressure like this, the opening and closed number of times of piston 5 have been reduced, the mechanical loss of piston 5 has been reduced, the service life of valve body 1 has been improved, the practicality of the device is improved.
As an embodiment of the present invention, as shown in fig. 2 and 5, the continuous pressure relief mechanism 7 includes a liquid storage tank 15, a non-newtonian fluid 19, a threaded groove 2, a one-way bearing 16, and a blocking blade 17, wherein the liquid storage tank 15 is fixedly connected to the upper end of the valve body 1, the threaded groove 2 is formed on the rod wall of the support rod 4 near the upper end, the one-way bearing 16 is rotatably connected to the inner center of the liquid storage tank 15, the blocking blade 17 is fixedly connected to the left and right sides of the one-way bearing 16, the non-newtonian fluid 19 is placed in the liquid storage tank 15, and the outer side of the threaded groove 2 is in screw transmission with the inner side of the one-way bearing 16;
when the support rod 4 moves upwards, the one-way bearing 16 is movably rotated, so that the one-way bearing 16 cannot rotate when the thread groove 2 formed in the support rod 4 moves upwards, what is described in particular here is that the one-way bearing 16 is internally provided with threads matched with the thread groove 2, when the pressure is released to a certain value, the piston 5 moves downwards under the action of the first spring 3, the piston 5 drives the support rod 4 to move downwards, when the support rod 4 moves downwards, the one-way bearing 16 is in a locked state, when the thread groove 2 moves downwards, the one-way bearing 16 is driven to rotate, the one-way bearing 16 rotates to drive the baffle vane 17 to rotate, when the baffle vane 17 rotates, the non-Newton liquid 19 arranged in the liquid storage bin 15 generates a certain reaction force to block the baffle vane 17 from rotating, so that the rotating speed of the support rod 4 is reduced, therefore, the descending of the support rod 4 is slowed, the time side length of pressure relief is prolonged, the up-and-down moving times of the piston 5 can be reduced, and the service life is prolonged.
As an embodiment of the present invention, as shown in fig. 6, a first threaded rod 13 is connected to the inner upper end of the support rod 4 through a thread, a rectangular opening 27 is formed in the inner center of the support rod 4, a cross rod 18 is rotatably connected to the lower end of the first threaded rod 13, the lower end of the cross rod 18 contacts with the upper end of the first spring 3, and a knob 14 is fixedly connected to the upper end of the first threaded rod 13;
the during operation, extrusion and the reseing at first spring 3 relapse, first spring 3's coefficient of elasticity can receive certain influence, drive first threaded rod 13 through rotating knob 14 this moment and rotate, first threaded rod 13 rotates and makes it reciprocate for bracing piece 4, bracing piece 4 drives horizontal pole 18 this moment and reciprocates, can adjust first spring 3's former length when horizontal pole 18 reciprocates, through the regulation to first spring 3, can compensate the loss energy when first spring 3's long-term the use, manual pressure release pressure to valve body 1 like this, the device's practicality has been increased.
As an embodiment of the present invention, as shown in fig. 4, a second threaded rod 23 is rotatably connected to a lower end of the piston 5, a filter screen 24 is fixedly connected to a position of an inner wall of the valve body 1 near the lower end, a first nut 25 is rotatably connected to a center of the lower end of the filter screen 24, an inner portion of the first nut 25 is in screw transmission with a rod wall of the second threaded rod 23, and scrapers 26 are fixedly connected to both left and right sides of the first nut 25;
during operation, the oil is in the transportation, inside has some impurity tiny particle, can influence piston 5's leakproofness like this, impurity in with the oil through filter screen 24 filters this moment, drive second threaded rod 23 rebound when piston 5 rebound this moment, second threaded rod 23 is when reciprocating, the first nut 25 that rotates the connection on making filter screen 24 takes place to rotate, drive two fixed connection's scraper blade 26 and rotate when first nut 25 rotates, get rid of the impurity particle on filter screen 24 surface when scraper blade 26 rotates, piston 5's sealed effect has been protected, the practicality of the device has been improved.
As an embodiment of the present invention, as shown in fig. 2, a cavity 22 is formed at the lower end of the interior of the valve body 1, a second spring 20 is fixedly connected to the left side of the cavity 22, a baffle 21 is fixedly connected to the right side of the second spring 20, a dirt collecting box 12 is sleeved at the lower end of the valve body 1, the lower end of the baffle 21 is in an inclined design, and the upper end of the dirt collecting box 12 is in an inclined design;
during operation, scraper blade 26 strikes off the back with the foreign particles from filter screen 24, and the foreign particles falls the inside of long-pending dirty box 12, and after a period of time, when getting rid of long-pending dirty box 12, cavity 22 inside second spring 20 promotes baffle 21 left this moment, seals the lower extreme of valve body 1 like this, avoids a large amount of spills of oil, can not need to get rid of long-pending dirty box 12 under the condition of exhausting the inside oil of valve body 1 to the greatest extent like this and clean, has improved the device's whole practicality like this.
As an embodiment of the present invention, as shown in fig. 2, a sawtooth rod 10 is fixedly connected to the right side of the piston 5, a vertical rod 8 is fixedly connected to the left side of the inner wall of the pressure relief pipe 6, a cleaning rod 9 is rotatably connected to the center of the vertical rod 8, a gear 11 is fixedly connected to the left side of the cleaning rod 9, and the outer side of the gear 11 is engaged with the sawtooth rod 10;
the during operation, under the condition that asphaltene and paraffin composition are many, the phenomenon that solidifies can appear in the oil, under the non-mobile condition of oil, the oil that contains above-mentioned composition appears solidifying more easily, in the inside of pressure release pipe 6 like this, if the oil solidifies then can lead to the pressure release effect not good, drive sawtooth pole 10 upward movement when piston 5 upwards moves, make gear 11 take place to rotate when sawtooth pole 10 upward movement, gear 11 drives clean pole 9 when the pivoted and rotates, clean pole 9 rotates and stirs the coagulum on the pressure release pipe 6 inner wall, the pressure release effect has been increased.
The working principle is as follows:
when the device works, when the pressure of a pipeline for conveying oil is increased, the piston 5 is pushed upwards by the oil, the piston 5 drives the support rod 4 to move upwards and compress the first spring 3, the oil is decompressed through the decompression pipe 6, the piston 5 can be slowly closed after the valve body 1 is opened through the continuous decompression mechanism 7, so that the opening and closing times of the piston 5 are reduced during oil transportation with unstable pressure, the mechanical loss of the piston 5 is reduced, the service life of the valve body 1 is prolonged, the practicability of the device is improved, when the support rod 4 moves upwards, the one-way bearing 16 is movably rotated, so that the rotation of the one-way bearing 16 cannot be caused when the threaded groove 2 formed in the support rod 4 moves upwards, when a certain value is reached, the decompression is carried out under the action of the first spring 3, the piston 5 moves downwards, the piston 5 drives the support rod 4 to move downwards at the moment, when the support rod 4 moves downwards, the one-way bearing 16 is in a locked state, when the thread groove 2 moves downwards, the one-way bearing 16 is driven to rotate, the one-way bearing 16 rotates to drive the baffle blade 17 to rotate, when the baffle blade 17 rotates, the non-Newtonian liquid 19 filled in the liquid storage bin 15 generates a certain reaction force to block the baffle blade 17 from rotating, so that the rotating speed of the support rod 4 is reduced, the descending of the support rod 4 is slowed, the time side length of pressure relief is made, the up-and-down movement times of the piston 5 can be reduced, the service life is prolonged, when the first spring 3 repeatedly extrudes and resets, the elastic coefficient of the first spring 3 is influenced to a certain degree, at the moment, the first threaded rod 13 is driven to rotate by rotating the knob 14, the first threaded rod 13 rotates to enable the first threaded rod 13 to move up and down relative to the support rod 4, the supporting rod 4 drives the cross rod 18 to move up and down, the original length of the first spring 3 can be adjusted when the cross rod 18 moves up and down, the energy loss caused by long-term use of the first spring 3 can be compensated through adjustment of the first spring 3, so that the manual pressure relief pressure on the valve body 1 is increased, the practicability of the device is improved, small particles of impurities are generated inside the oil during transportation, the sealing performance of the piston 5 is affected, impurities in the oil are filtered through the filter screen 24 at the moment, the second threaded rod 23 is driven to move upwards when the piston 5 moves upwards, the first nut 25 which is connected with the filter screen 24 in a rotating mode is rotated when the second threaded rod 23 moves up and down, the two scraper blades 26 which are fixedly connected with the first nut 25 are driven to rotate when the first nut 25 rotates, and the particles of the impurities on the surface of the filter screen 24 are removed when the scraper blades 26 rotate, the sealing effect of the piston 5 is protected, the practicability of the device is improved, after impurity particles are scraped from the filter screen 24 by the scraper 26, the impurity particles fall into the dirt accumulation box 12, when the dirt accumulation box 12 is removed after a period of time, the baffle 21 is pushed leftwards by the second spring 20 in the cavity 22, the lower end of the valve body 1 is sealed, a large amount of oil is prevented from leaking, the dirt accumulation box 12 can be removed and cleaned without exhausting the oil in the valve body 1, the overall practicability of the device is improved, the oil can be solidified under the condition that the components of the oil are more, the oil containing the components is more easily solidified under the condition that the oil is not flowing, the pressure relief effect is poor under the condition that the oil is solidified, and the serrated rod 10 is driven to move upwards when the piston 5 moves upwards, when the sawtooth rod 10 moves upwards, the gear 11 rotates, the gear 11 drives the cleaning rod 9 to rotate when rotating, the cleaning rod 9 rotates to stir concretions on the inner wall of the pressure relief pipe 6, and the pressure relief effect is improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a grading safety valve for oil production, includes valve body (1), its characterized in that, the right side fixedly connected with pressure release pipe (6) of valve body (1), the inside sliding connection of valve body (1) has piston (5), the upper end fixedly connected with bracing piece (4) of piston (5), first spring (3) have been cup jointed to the pole wall of bracing piece (4), being equipped with of valve body (1) lasts pressure release mechanism (7).
2. The staged safety valve for petroleum production as claimed in claim 1, wherein the continuous pressure relief mechanism (7) comprises a reservoir (15), a non-Newtonian liquid (19), a threaded groove (2), a one-way bearing (16) and a blocking blade (17), the reservoir (15) is fixedly connected to the upper end of the valve body (1), the threaded groove (2) is arranged on the rod wall of the support rod (4) near the upper end, the one-way bearing (16) is rotatably connected to the inner center of the reservoir (15), the blocking blade (17) is fixedly connected to the left and right sides of the one-way bearing (16), the non-Newtonian liquid (19) is placed in the reservoir (15), and the outer side of the threaded groove (2) is in screw transmission with the inner part of the one-way bearing (16).
3. The staged safety valve for petroleum production as claimed in claim 2, wherein the inner upper end of the support rod (4) is connected with a first threaded rod (13) by screw thread, the inner center of the support rod (4) is provided with a rectangular opening (27), the lower end of the first threaded rod (13) is rotatably connected with a cross rod (18), the lower end of the cross rod (18) is in contact with the upper end of the first spring (3), and the upper end of the first threaded rod (13) is fixedly connected with a knob (14).
4. The staged safety valve for petroleum production as claimed in claim 3, wherein a second threaded rod (23) is rotatably connected to the lower end of the piston (5), a strainer (24) is fixedly connected to the inner wall of the valve body (1) near the lower end, a first nut (25) is rotatably connected to the center of the lower end of the strainer (24), the inner portion of the first nut (25) is in screw transmission with the rod wall of the second threaded rod (23), and scrapers (26) are fixedly connected to the left and right sides of the first nut (25).
5. The grading safety valve for petroleum production according to claim 2, characterized in that a cavity (22) is opened at the lower end of the interior of the valve body (1), a second spring (20) is fixedly connected to the left side of the cavity (22), a baffle (21) is fixedly connected to the right side of the second spring (20), and a dirt collecting box (12) is sleeved at the lower end of the valve body (1).
6. A grading safety valve for oil production according to claim 5, characterized in that the lower end of the baffle (21) is of inclined design and the upper end of the dirt accumulation box (12) is of inclined design.
7. The staged safety valve for petroleum production according to claim 1, wherein a sawtooth rod (10) is fixedly connected to the right side of the piston (5), a vertical rod (8) is fixedly connected to the left side of the inner wall of the pressure relief pipe (6), a cleaning rod (9) is rotatably connected to the center of the vertical rod (8), a gear (11) is fixedly connected to the left side of the cleaning rod (9), and the outer side of the gear (11) is meshed with the sawtooth rod (10).
8. A grading safety valve for oil production according to claim 1, characterized in that the inner wall surface of the valve body (1) is coated with a corrosion resistant film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111322441.XA CN114233903A (en) | 2021-11-09 | 2021-11-09 | Hierarchical relief valve is used in oil production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111322441.XA CN114233903A (en) | 2021-11-09 | 2021-11-09 | Hierarchical relief valve is used in oil production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114233903A true CN114233903A (en) | 2022-03-25 |
Family
ID=80748948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111322441.XA Withdrawn CN114233903A (en) | 2021-11-09 | 2021-11-09 | Hierarchical relief valve is used in oil production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114233903A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114790877A (en) * | 2022-06-15 | 2022-07-26 | 李奇伟 | Be applied to pressure build-up prevention device of production tree |
-
2021
- 2021-11-09 CN CN202111322441.XA patent/CN114233903A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114790877A (en) * | 2022-06-15 | 2022-07-26 | 李奇伟 | Be applied to pressure build-up prevention device of production tree |
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Application publication date: 20220325 |