Relief valve of rectifying tower

Abstract

The utility model discloses a relief valve for a rectifying tower, which relates to the technical field of rectifying towers and particularly comprises a valve body, a connecting pipe connected with a relief port of the rectifying tower is arranged in the middle of the bottom of the valve body, a permanent magnet ring is connected to an outer ring of the bottom of the valve body, and a relief pipe is arranged on one side of the bottom end of the valve body. An inner cavity of the valve body is connected with a sealing assembly through a spring, and the sealing assembly comprises a center pipe, a side sealing gasket connected with the side, close to the discharging pipe, of the center pipe and an upper sealing plate connected with the top of the center pipe. According to the relief valve of the rectifying tower, the sealing assembly is protected through the protective scraper, the situation that the sealing assembly is corroded and abraded directly by a relief medium is avoided, the service life of the sealing assembly is prolonged, and in the downward moving process of the sealing assembly, the protective scraper can scrape away impurities attached to the inner wall of the valve body, so that the safety of the rectifying tower is improved. Impurities are prevented from affecting the sealing effect of the sealing assembly on the valve body.

Description

TECHNICAL FIELD

[0001] The utility model relates to rectifying tower technical field, concretely is a kind of rectifying tower relief safety valve. BACKGROUND

[0002] The rectifying tower relief safety valve is a safety device for protecting the rectifying tower system from overpressure damage. When the pressure in the tower exceeds the set value, the safety valve automatically opens to release the medium, thereby preventing equipment explosion or structural failure. However, there is a significant technical defect in the conventional safety valve during use: the release medium directly impacts the sealing contact surface of the safety valve. This direct contact can cause two major problems: one is the chemical erosion of the corrosive medium to the sealing surface, and the other is the physical accumulation of solid particles carried in the medium on the sealing surface. Both of these situations can seriously affect the sealing performance and service life of the safety valve, and may cause valve leakage, abnormal opening and closing, etc. safety hazards, ultimately threatening the safe and stable operation of the entire rectifying system. Based on this, the present application proposes a rectifying tower relief safety valve. SUMMARY

[0003] The utility model provides a kind of rectifying tower relief safety valve, solve the problem that release medium directly impacts the sealing contact surface of safety valve in the above background technology, easy to affect the sealing performance and service life of safety valve.

[0004] The utility model provides the following technical scheme: a kind of rectifying tower relief safety valve, including valve body, the middle part of the bottom of the valve body is provided with the connecting pipe connected with rectifying tower blow-off port, the outer ring of the bottom of the valve body is connected with permanent magnet ring, the side of the bottom end of the valve body is provided with blow-off pipe, the inner chamber of the valve body is connected with sealing assembly by spring, the sealing assembly includes center pipe, the side sealing gasket connected with the side of center pipe close to blow-off pipe, the upper sealing plate connected with the top of center pipe, the upper sealing air bag of the outer ring of the upper sealing plate is sleeved, the lower sealing plate connected with the bottom of center pipe, the lower sealing air bag of the outer ring of the lower sealing plate is sleeved and the protective scraper connected with the bottom of lower sealing plate, the bottom of the inner chamber of the sealing assembly is provided with air bag adjusting structure, and the air bag adjusting structure is in magnetic attraction with permanent magnet ring.

[0005] Preferably, the top of the upper sealing plate is connected with a spring in the middle, the other end of the spring is fixedly connected with the top of the inner chamber of the valve body, and the top of the inner chamber of the valve body is uniformly provided with a guide telescopic rod, and the bottom of the guide telescopic rod is fixedly connected with the upper sealing plate.

[0006] Preferably, the lower sealing air bag is designed as double sealing, and the lower sealing air bag includes a first sealing air bag connected with the outer ring of the bottom end of the lower sealing plate and a second sealing air bag connected with the outer ring of the bottom end of the lower sealing plate.

[0007] Preferably, the lower sealing plate is a hollow structure, the air bag adjusting structure comprises a lifting rod movably connected with the middle part of the inner cavity of the lower sealing plate, a magnetic plate connected with the bottom of the lifting rod, a lifting plate connected with the top of the lifting rod and a clamping column connected with the top of the lifting plate; the bottom end of the inner cavity of the lower sealing plate is connected with an elastic sheet, the elastic sheet is located below the magnetic plate, the magnetic plate is magnetically attracted to the permanent magnet ring; the lifting plate is movably connected with the inner cavity of the center pipe, a deflation gap is arranged between the lifting plate and the lower sealing plate, and a clamping groove matched with the clamping column is arranged at the top of the inner cavity of the center pipe.

[0008] Preferably, the side sealing gasket is matched with the inner cavity of the relief pipe, and the inner cavity of the side sealing gasket is communicated with the inner cavity of the deflation gap through a connecting hole one; a connecting hole two is arranged on the lower sealing plate, and the inner cavity of the lower sealing gas bag is communicated with the inner cavity of the deflation gap through the connecting hole two.

[0009] Preferably, the bottom end of the deflation gap is provided with a communication pipe, and the other end of the communication pipe extends to the inner cavity of the upper sealing gas bag.

[0010] Compared with the prior art, the utility model has the advantages of the following beneficial effects:

[0011] 1、The rectifying tower relief safety valve utilizes the protective scraper to protect the sealing assembly, avoids that the relief medium directly corrodes and wears the sealing assembly, prolongs the service life of the sealing assembly, and in the downward movement process of the sealing assembly, the protective scraper can scrape off the impurities adhered to the inner wall of the valve body, so that the sealing effect of the sealing assembly on the valve body is avoided.

[0012] 2、The rectifying tower relief safety valve is provided with the side sealing gasket, the upper sealing gas bag and the lower sealing gas bag, the sealing assembly can realize multiple sealing of the valve body, the sealing performance of the valve body is improved, and under the action of the air bag adjusting structure, when the sealing assembly moves, the side sealing gasket, the upper sealing gas bag and the lower sealing gas bag are separated from the valve body, the moving friction of the sealing assembly is reduced, and the response speed of the safety valve is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a front view of the structure of the utility model;

[0014] Figure 2 It is a bottom view of the structure of the utility model;

[0015] Figure 3 It is an internal view of the structure of the utility model;

[0016] Figure 4 It is a structure Figure 3 bottom view of the utility model;

[0017] Figure 5The utility model discloses structure sealing assembly section view schematic drawing.

[0018] In the drawing: 1, valve body;2, connecting pipe;3, release pipe;4, permanent magnet ring;5, spring;6, guide telescopic rod;7, upper sealing air bag;8, center pipe;9, second sealing air bag;10, lower sealing plate;11, protective scraper;12, side sealing gasket;13, upper sealing plate;14, first sealing air bag;15, magnetic attraction plate;16, connecting hole two;17, communication pipe;18, lifting rod;19, clamping groove;20, elastic sheet;21, clamping column;22, connecting hole one;23, lifting plate;24, deflation gap. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0020] The utility model provides an embodiment: Figures 1-5 A kind of rectifying column release safety valve, including valve body 1, the middle part of the bottom of valve body 1 is provided with the connecting pipe 2 connected with rectifying column release port, the outer ring of the bottom of valve body 1 is connected with permanent magnet ring 4, the side of the bottom end of valve body 1 is provided with release pipe 3, the inner cavity of valve body 1 is connected with sealing assembly by spring 5, sealing assembly includes center pipe 8, upper sealing plate 13 connected with the top of center pipe 8 and lower sealing plate 10 connected with the bottom of center pipe 8, the middle part of the top of upper sealing plate 13 is connected with spring 5, the other end of spring 5 is fixedly connected with the top of the inner cavity of valve body 1, the top of the inner cavity of valve body 1 is uniformly provided with guide telescopic rod 6, the bottom of guide telescopic rod 6 is fixedly connected with upper sealing plate 13, by the setting of spring 5, in the release process, the release medium in rectifying column can extrude sealing assembly, so that release pipe 3 is in open state, the release of excess medium in rectifying column is realized, and spring 5 is in compressed state, after release, under the action of spring 5 resilience, sealing assembly can reset, realize the simultaneous plugging of connecting pipe 2 and release pipe 3, improve the sealing property of the application, and in the movement process of sealing assembly, guide telescopic rod 6 guides sealing assembly, guide telescopic rod 6 is prior art, and here is not described.

[0021] The bottom of the lower sealing plate 10 is connected with a protective scraper 11. The protective scraper 11 can protect the sealing assembly, avoid the corrosion and wear of the sealing assembly by the leakage medium, prolong the service life of the sealing assembly, and the material of the protective scraper 11 can be set according to the requirement, which is not limited here. In addition, the protective scraper 11 can scrape off the impurities adhered to the inner wall of the valve body 1 during the downward movement of the sealing assembly, facilitating the use of the sealing assembly. The bottom end of the inner cavity of the valve body 1 is conical, which facilitates the removal of the impurities scraped off by the protective scraper 11.

[0022] The side sealing gasket 12 is arranged on one side of the center pipe 8 close to the leakage pipe 3, and the side sealing gasket 12 is matched with the inner cavity of the leakage pipe 3. The outer circle of the upper sealing plate 13 is sleeved with the upper sealing air bag 7, and the outer circle of the lower sealing plate 10 is sleeved with the lower sealing air bag. The lower sealing air bag is a double sealing design, which includes the first sealing air bag 14 connected with the outer circle of the bottom end of the lower sealing plate 10 and the second sealing air bag 9 connected with the outer circle of the bottom end of the lower sealing plate 10. Through the arrangement of the side sealing gasket 12, the upper sealing air bag 7 and the lower sealing air bag, the sealing assembly can realize multiple sealing of the valve body 1, and improve the sealing performance of the valve body 1.

[0023] The bottom end of the inner cavity of the sealing assembly is provided with an air bag adjusting structure, and the air bag adjusting structure is magnetically attracted to the permanent magnet ring 4. The lower sealing plate 10 is a hollow structure, and the air bag adjusting structure includes a lifting rod 18 movably connected with the middle part of the inner cavity of the lower sealing plate 10, a magnetic plate 15 connected with the bottom of the lifting rod 18, a lifting plate 23 connected with the top of the lifting rod 18, and a clamping column 21 connected with the top of the lifting plate 23. The bottom end of the inner cavity of the lower sealing plate 10 is connected with an elastic sheet 20, which is located below the magnetic plate 15. The elastic sheet 20 is used to intercept the leakage medium to prevent the leakage medium from entering the inner cavity of the lower sealing plate 10. The magnetic plate 15 is magnetically attracted to the permanent magnet ring 4. The lifting plate 23 is movably connected with the inner cavity of the center pipe 8, and a gas leakage gap 24 is arranged between the lifting plate 23 and the lower sealing plate 10. The top of the inner cavity of the center pipe 8 is provided with a clamping groove 19 matched with the clamping column 21. The inner cavity of the side sealing gasket 12 is communicated with the inner cavity of the gas leakage gap 24 through a connecting hole 22, and the lower sealing plate 10 is provided with a connecting hole 16. The inner cavity of the lower sealing air bag is communicated with the inner cavity of the gas leakage gap 24 through the connecting hole 16. The bottom end of the gas leakage gap 24 is provided with a communication pipe 17, and the other end of the communication pipe 17 extends to the inner cavity of the upper sealing air bag 7.

[0024] When the pressure at the relief port of the rectification tower is greater than the magnetic attraction force between the magnetic plate 15 and the permanent magnet ring 4, the relief medium will press upward the lifting rod 18, the lifting rod 18 drives the magnetic plate 15 and the lifting plate 23 to move, until the clamping column 21 is clamped with the clamping groove 19, at this time the volume of the air gap 24 is increased, the gas in the inner cavities of the upper sealing air bag 7, the lower sealing air bag and the side sealing gasket 12 can enter the air gap 24, and then the sealing between the three and the valve body is released, so that the relief medium presses the sealing assembly, the sealing assembly moves upward, and then the safety valve can realize the relief function. After the safety valve realizes the relief, under the action of the spring 5, the sealing assembly resets, at this time under the action of the magnetic attraction force between the magnetic plate 15 and the permanent magnet ring 4, the magnetic plate 15 moves downward, the magnetic plate 15 drives the lifting plate 23 to move downward through the lifting rod 18, until the magnetic plate 15 resets, at this time the volume of the air gap 24 is reduced, the gas in the air gap 24 reenters the inner cavities of the upper sealing air bag 7, the lower sealing air bag and the side sealing gasket 12, and the sealing assembly reseals the valve body 1.

[0025] In one embodiment of the present application, the material of the magnetic plate 15 is ferromagnetic metal, the material of the permanent magnet ring 4 is permanent magnet, and the materials of the upper sealing air bag 7, the lower sealing air bag, the side sealing gasket 12 and the elastic sheet 20 can be set according to requirements, which are not limited here.

[0026] In summary: when the rectification tower relief safety valve is used, the sealing assembly seals the connecting pipe 2 and the relief pipe 3 at the same time, and under the action of the magnetic attraction force between the permanent magnet ring 4 and the magnetic plate 15, the lifting plate 23 presses the air gap 24, so that the gas in the air gap 24 enters the side sealing gasket 12 through the connecting hole 22, the side sealing gasket 12 can realize the plugging of the inner cavity of the relief pipe 3, the gas in the air gap 24 enters the lower sealing air bag through the connecting hole 16, the lower sealing air bag and the inner wall of the valve body 1 can realize tight fit, the gas in the air gap 24 enters the inner cavity of the upper sealing air bag 7 through the connecting pipe 17, the upper sealing air bag 7 and the valve body 1 are tightly fitted, and the upper sealing air bag 7 and the lower sealing air bag are used together to realize the sealing of the valve body 1.

[0027] When the medium pressure at the distillation column vent exceeds the magnetic attraction between the permanent magnet ring 4 and the magnetic suction plate 15, the venting medium will push the lifting rod 18 upward. The lifting rod 18 will drive the lifting plate 23 to move upward until the locking pin 21 engages with the locking groove 19. At this time, the volume of the venting gap 24 increases, and the gas in the inner cavities of the upper sealing airbag 7, the lower sealing airbag, and the side sealing gasket 12 enters the venting gap 24. The volume of the upper sealing airbag 7, the lower sealing airbag, and the side sealing gasket 12 decreases, releasing the interference seal between the sealing assembly and the valve body 1. The venting medium can then push the sealing assembly upward until the venting pipe 3 is in the open state, and the venting medium is discharged through the venting pipe 3. After the release is completed, the sealing assembly is reset under the action of the spring 5. Under the action of the magnetic attraction between the permanent magnet ring 4 and the magnetic suction plate 15, the lifting rod 18 drives the lifting plate 23 to reset. The gas in the venting gap 24 is squeezed into the inner cavity of the upper sealing airbag 7, the lower sealing airbag and the side sealing gasket 12. The sealing assembly and the valve body 1 achieve a new interference seal to prevent the safety valve from leaking.

[0028] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each structure adopt conventional technical means such as bolt connection that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A relief safety valve for a rectification column comprising a valve body (1), characterized in that: The middle part of the bottom of the valve body (1) is provided with a connecting pipe (2) connected with the relief port of the rectifying tower, the outer ring of the bottom of the valve body (1) is connected with a permanent magnet ring (4), one side of the bottom end of the valve body (1) is provided with a relief pipe (3), the inner cavity of the valve body (1) is connected with a sealing assembly through a spring (5), the sealing assembly comprises a center pipe (8), a side sealing gasket (12) connected with the center pipe (8) on the side close to the relief pipe (3), an upper sealing plate (13) connected with the center pipe (8) on the top, an upper sealing air bag (7) sleeved on the outer ring of the upper sealing plate (13), a lower sealing plate (10) connected with the center pipe (8) on the bottom, a lower sealing air bag sleeved on the outer ring of the lower sealing plate (10) and a protective scraper (11) connected with the bottom of the lower sealing plate (10), the bottom end of the inner cavity of the sealing assembly is provided with an air bag adjusting structure, and the air bag adjusting structure is magnetically attracted to the permanent magnet ring (4).

2. A relief valve for a distillation column according to claim 1, characterized in that: The middle part of the top of the upper sealing plate (13) is connected with a spring (5), the other end of the spring (5) is fixedly connected with the top of the inner cavity of the valve body (1), and the top of the inner cavity of the valve body (1) is uniformly provided with a guide telescopic rod (6), and the bottom of the guide telescopic rod (6) is fixedly connected with the upper sealing plate (13).

3. A relief valve for a distillation column according to claim 1, wherein: The lower sealing air bag is a double sealing design, and the lower sealing air bag comprises a first sealing air bag (14) connected with the outer ring of the bottom end of the lower sealing plate (10) and a second sealing air bag (9) connected with the outer ring of the bottom end of the lower sealing plate (10).

4. A relief valve for a distillation column according to claim 1, wherein: The lower sealing plate (10) is a hollow structure, and the air bag adjusting structure comprises a lifting rod (18) movably connected with the middle part of the inner cavity of the lower sealing plate (10), a magnetic attraction plate (15) connected with the bottom of the lifting rod (18), a lifting plate (23) connected with the top of the lifting rod (18) and a clamping column (21) connected with the top of the lifting plate (23); the bottom end of the inner cavity of the lower sealing plate (10) is connected with an elastic sheet (20), the elastic sheet (20) is located below the magnetic attraction plate (15), the magnetic attraction plate (15) is magnetically attracted to the permanent magnet ring (4); the lifting plate (23) is movably connected with the inner cavity of the center pipe (8), the lifting plate (23) and the lower sealing plate (10) are provided with a gas leakage gap (24), and the top of the inner cavity of the center pipe (8) is provided with a clamping groove (19) matched with the clamping column (21).

5. A relief valve for a distillation column according to claim 4, wherein: The side sealing gasket (12) is matched with the inner cavity of the relief pipe (3), the inner cavity of the side sealing gasket (12) is communicated with the inner cavity of the gas leakage gap (24) through a connecting hole (22), and the lower sealing plate (10) is provided with a connecting hole (16), and the inner cavity of the lower sealing air bag is communicated with the inner cavity of the gas leakage gap (24) through the connecting hole (16).

6. A relief valve for a distillation column according to claim 4, wherein: The bottom end of the gas leakage gap (24) is provided with a communication pipe (17), and the other end of the communication pipe (17) extends to the inner cavity of the upper sealing air bag (7).

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