Floating type liquid level meter sealing device for vertical ammonia water storage tank

Abstract

The floating type liquid level meter sealing device comprises an inner cylinder, a middle cylinder, an outer cylinder, a flange cover and a steel wire, a mounting hole is formed in the flange cover, the bottom end of the inner cylinder is fixedly connected with the mounting hole of the flange cover, and the top end of the inner cylinder is fixedly connected with a fixed pulley; a middle cylinder and an outer cylinder are sequentially arranged outside the inner cylinder; the middle cylinder and the outer cylinder are fixedly connected with the flange cover, pulley blocks are connected to the side walls of the middle cylinder and the outer cylinder, one end of a steel wire is connected with the floating ball, the other end of the steel wire is connected with an identification part arranged outside the outer cylinder through a fixed pulley and the pulley blocks, and through holes allowing the steel wire to pass through are formed in the middle cylinder and the outer cylinder. The sealing device has the advantages that the sealing problem of the floating type liquid level meter of the vertical ammonia water storage tank is solved, the sealing device can be independently manufactured, can be directly fixed on an upper cover flange of the vertical ammonia water storage tank through a bolt, can be replaced without special operations such as production halt and fire operation, and is convenient to transform the existing floating type liquid level meter.

Description

Technical Field

[0001] The utility model belongs to the field of liquid level measurement, in particular to a floating type liquid level meter sealing device used for an ammonia water vertical storage tank. Background Art

[0002] At present, the direct-reading level gauge installed in the vertical ammonia storage tank of a coking plant is a float-type level gauge, which displays the liquid level on the mark part by pulling the float through the connecting wire. There is a gap between the connecting wire and the tank top cover, which makes the vertical ammonia storage tank unable to be effectively closed. According to the "Opinions on Promoting the Implementation of Ultra-low Emissions in the Steel Industry" issued by the Ministry of Ecology and Environment and other five ministries and commissions, and the "Technical Guidelines for the Formulation of Emergency Emission Reduction Measures for Key Industries in Heavy Pollution Weather" issued by the Ministry of Ecology and Environment, VOCs waste gas emitted from each storage tank, tank, and pool of the coal gas purification (chemical production) and deep processing system is collected and effectively treated in a closed manner. The existing installation structure of the float-type level gauge cannot meet the closure requirements.

[0003] In the prior art, patent application number: CN201020578878.0 discloses a fully sealed float level gauge, which uses a guide component to limit the movement direction of the float and the external weight, and uses conventional fillers to achieve full sealing of the tank body. The moving part of the transmission wire is also sealed, which is not conducive to the movement of the transmission wire. In addition, the overall structure of the level gauge is complex and is not conducive to on-site modification. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a floating liquid level gauge sealing device for a vertical ammonia storage tank, which ensures that the vertical ammonia storage tank is effectively closed and avoids the overflow of waste gas. At the same time, the floating liquid level gauge can be modified without stopping production.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A floating type liquid level gauge sealing device for a vertical ammonia storage tank comprises an inner cylinder, a middle cylinder, an outer cylinder, a flange cover and a steel wire. The flange cover is provided with a mounting hole. The bottom end of the inner cylinder is fixedly connected to the mounting hole of the flange cover, and the top end is fixedly connected to a fixed pulley. A middle cylinder and an outer cylinder are sequentially arranged outside the inner cylinder. Both the middle cylinder and the outer cylinder are fixedly connected to the flange cover. The side walls of the middle cylinder and the outer cylinder are connected with a pulley block. One end of the steel wire is connected to a float, and the other end is connected to an identification part arranged on the outside of the outer cylinder via the fixed pulley and the pulley block. The middle cylinder and the outer cylinder are provided with through holes for the steel wire to pass through.

[0007] The flange cover is fixedly connected to the upper cover flange of the vertical ammonia water storage tank by bolts.

[0008] The top of the middle cylinder is connected with a sealing cover.

[0009] The top of the inner cylinder is connected with a cover plate, and a small hole is opened on the cover plate.

[0010] The inner cylinder, the middle cylinder and the outer cylinder are coaxially arranged.

[0011] The lower part of the middle cylinder is fixedly connected with a pulley block.

[0012] The pulley block comprises a fixed pulley 1 and a fixed pulley 2, and the fixed pulley 1 and the fixed pulley 2 are respectively fixed on the inner wall and the outer wall of the middle cylinder.

[0013] A bracket is welded on the outer cylinder, and a fixed pulley is connected to the end of the bracket.

[0014] Lubricating oil is arranged in the outer cylinder.

[0015] The top of the outer cylinder is connected with a dust cover.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model solves the sealing problem of the float type liquid level gauge of the vertical storage tank of ammonia water. The sealing device can be made separately and can be directly fixed to the upper cover flange of the vertical storage tank of ammonia water by bolts. It can be replaced without stopping production and performing special operations such as hot work, avoiding safety risks in the operation and facilitating the transformation of the existing float type liquid level gauge.

[0018] 2. The utility model adopts a three-layer straight cylinder structure to ensure the effective closure of the vertical ammonia storage tank. At the same time, the holes for passing the steel wire are not set in the same direction and height to reduce gas overflow. At the same time, the lubricating oil is filled in the outer cylinder to cover the holes for passing the steel wire, so as to achieve hole sealing, prevent the VOCs waste gas generated in the tank from overflowing, and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 .

[0020] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 .

[0021] In the figure: 1-inner cylinder 2-middle cylinder 3-outer cylinder 4-flange cover 5-steel wire 6-fixed pulley 1 7-pulley block 1 8-pulley block 2 9-through hole 10-identification part 11-sealing cover 12-cover plate 13-fixed pulley 2 14-bracket 15-lubricating oil 16-dust cover. DETAILED DESCRIPTION

[0022] The present invention is described in detail below in conjunction with the accompanying drawings of the specification, but it should be noted that the implementation of the present invention is not limited to the following embodiments. Example

[0023] See Figure 1 A floating type liquid level gauge sealing device for a vertical ammonia storage tank comprises an inner cylinder 1, a middle cylinder 2, an outer cylinder 3, a flange cover 4, and a steel wire 5. The flange cover 4 is provided with a mounting hole. The bottom end of the inner cylinder 1 is fixedly connected to the mounting hole of the flange cover 4, and the top end is fixedly connected to a fixed pulley 6. The inner cylinder 1 is provided with a middle cylinder 2 and an outer cylinder 3 in sequence on the outside. The inner cylinder 1, the middle cylinder 2, and the outer cylinder 3 are coaxially arranged. The middle cylinder 2 and the outer cylinder 3 are welded to the flange cover 4. The side walls of the middle cylinder 2 and the outer cylinder 3 are respectively connected to a pulley block 7 and a pulley block 8. One end of the steel wire 5 is connected to a floating ball, and the other end is connected to a marking part 10 arranged on the outside of the outer cylinder 3 through a fixed pulley and a pulley block. The middle cylinder 2 and the outer cylinder 3 are provided with a through hole 9 for the steel wire 5 to pass through. A sealing cover 11 is welded on the top of the middle cylinder 2 to prevent the gas in the storage tank from overflowing.

[0024] The sealing device can be first manufactured as a whole in a safe area, and then installed as a whole on the upper cover flange of the vertical ammonia storage tank. The flange cover 4 of the sealing device is fixedly connected with the upper cover flange of the vertical ammonia storage tank by bolts to complete the overall installation. Example

[0025] See Figure 2 On the basis of Example 1, the lower part of the middle cylinder 2 is fixedly connected with a pulley block 7. The pulley block 7 includes two fixed pulleys, which are respectively fixed on the inner wall and the outer wall of the middle cylinder 2 and installed on the same horizontal plane. The steel wire 5 passes through the through hole 9 at the lower part of the middle cylinder 2 and is supported and turned by the two fixed pulleys to ensure that the steel wire 5 does not scrape the middle cylinder 2 when passing through the through hole 9. Lubricating oil 15 is injected into the outer cylinder 3, and the liquid level of the lubricating oil 15 is higher than the through hole 9 on the middle cylinder 2, which completely prevents gas from overflowing.

[0026] A bracket 14 is welded on the outer tube 3 , and a second fixed pulley 13 is connected to the end of the bracket 14 . The steel wire 5 led out from the wall of the outer tube 3 is supported by the second fixed pulley 13 and turned downward, and the bottom end is fixedly connected to the identification part 10 .

[0027] In addition, a cover plate 12 is connected to the top of the inner cylinder 1, and a small hole is opened on the cover plate 12, through which the steel wire 5 can pass, and at the same time, the gas in the storage tank can be reduced from overflowing. A dust cover 16 is connected to the top of the outer cylinder 3 to prevent dust from contaminating the lubricating oil 15.

[0028] When making the sealing device of the floating level gauge for the vertical storage tank of ammonia water: first, open a ø50mm through hole in the center of the flange cover 4 (DN150 PN16). Use a 20# steel pipe ø57×3mm to make an inner cylinder 1 with a height of 200mm. A fixed pulley 6 is fixedly installed on the top of the inner cylinder 1 to connect the steel wire 5 and change the running direction of the steel wire 5. The height of the inner cylinder 1 is the effective sealing height of the sealing device, which can ensure zero leakage of the device. The bottom of the inner cylinder 1 is welded to the through hole in the middle of the flange cover 4 to ensure that there is no leakage in the welding. Use a 20# steel pipe ø108×3.5mm to make the middle cylinder 2 with a height of 250mm. Open a through hole 9 at the bottom of the middle cylinder 2 to pass the steel wire 5 and ensure that the middle cylinder 2 cavity can be connected with the inner cavity of the outer cylinder 3. Two fixed pulleys are installed on the inner and outer walls on the same horizontal plane near the through hole 9 to ensure that when the steel wire 5 passes through the through hole 9 of the middle cylinder 2, it will run without obstruction and will not scrape the middle cylinder 2, and at the same time change the movement direction of the steel wire 5. A cover 11 is welded on the top of the middle cylinder 2. The outer cylinder 3 is made of a 20# steel pipe ø133×3.5mm with a height of 300mm. A pulley block 8 is installed on the upper part of the inner wall of the outer cylinder 3, and a through hole 9 is opened at the corresponding position for the steel wire 5 to pass through the outer cylinder 3. The steel wire 5 passes through all fixed pulleys and pulley blocks, and is connected to the original float and identification part 10. Finally, the flange cover 4 is fixed with the flange bolts of the upper cover of the ammonia vertical storage tank, and it is checked and confirmed that the steel wire 5 slides freely. Inject lubricating oil 15 into the outer cylinder 3 until the lubricating oil 15 submerges the through hole 9 at the bottom of the middle cylinder 2. Check the oil level of the lubricating oil 15 during inspection to ensure that the lubricating oil 15 submerges the through hole 9 at the bottom of the middle cylinder 2.

[0029] The utility model solves the sealing problem of the floating level gauge of the vertical ammonia storage tank, ensures the effective sealing of the vertical ammonia storage tank, and prevents the VOCs waste gas generated in the tank from overflowing. At the same time, considering that there are flammable and explosive media inside the vertical ammonia storage tank, it cannot be modified online with fire, and the vertical ammonia storage tank is in 24-hour uninterrupted production operation. The sealing device only needs to be fixed to the upper cover flange of the vertical ammonia storage tank by bolts to complete the installation, which is convenient for non-stop operation and modification. After using the sealing device, the vertical ammonia storage tank operates reliably and is effectively sealed.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Through the above specific implementations, those skilled in the art can easily implement the utility model. However, it should be understood that the utility model is not limited to the above specific implementations. On the basis of the disclosed implementations, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

Claims

1. A floating level gauge sealing device for a vertical ammonia storage tank, characterized in that: It includes an inner cylinder, a middle cylinder, an outer cylinder, a flange cover, a steel wire, a fixed pulley and a pulley block. The flange cover is provided with a mounting hole. The bottom end of the inner cylinder is fixedly connected to the mounting hole of the flange cover, and the top end is fixedly connected to the fixed pulley. The outer side of the inner cylinder is sequentially provided with a middle cylinder and an outer cylinder. The middle cylinder and the outer cylinder are both fixedly connected to the flange cover. The side walls of the middle cylinder and the outer cylinder are both connected with a pulley block. One end of the steel wire is connected to a floating ball, and the other end is connected to an identification part arranged on the outer side of the outer cylinder via the fixed pulley and the pulley block. The middle cylinder and the outer cylinder are both provided with through holes for the steel wire to pass through.

2. A floating type liquid level gauge sealing device for a vertical ammonia water storage tank according to claim 1, characterized in that: The flange cover is fixedly connected to the upper cover flange of the vertical ammonia water storage tank by bolts.

3. The sealing device of a floating level gauge for a vertical ammonia water storage tank according to claim 1, characterized in that: The top of the middle cylinder is connected with a sealing cover.

4. A sealing device for a floating level gauge for a vertical ammonia water storage tank according to claim 1, characterized in that: The top of the inner cylinder is connected with a cover plate, and a small hole is opened on the cover plate.

5. The sealing device of a float type liquid level gauge for a vertical ammonia water storage tank according to claim 1, characterized in that: The inner cylinder, the middle cylinder and the outer cylinder are coaxially arranged.

6. The sealing device of a float type liquid level gauge for a vertical ammonia water storage tank according to claim 1, characterized in that: The lower part of the middle cylinder is fixedly connected with a pulley block.

7. The sealing device of a float type liquid level gauge for a vertical ammonia water storage tank according to claim 1, characterized in that: The pulley block comprises a fixed pulley 1 and a fixed pulley 2, and the fixed pulley 1 and the fixed pulley 2 are respectively fixed on the inner wall and the outer wall of the middle cylinder.

8. The sealing device of a float type liquid level gauge for a vertical ammonia water storage tank according to claim 1, characterized in that: A bracket is welded on the outer cylinder, and a fixed pulley is connected to the end of the bracket.

9. The sealing device of a float type liquid level gauge for a vertical ammonia water storage tank according to claim 1, characterized in that: Lubricating oil is arranged in the outer cylinder.

10. The sealing device of a float type liquid level gauge for a vertical ammonia water storage tank according to claim 1, characterized in that: The top of the outer cylinder is connected with a dust cover.

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