Nitrogen sealing purging device

Abstract

The utility model relates to the field of design and use of glasses valve equipment, and particularly discloses a nitrogen sealing and purging device which comprises a nitrogen system, a gas supply system and a gas supply system, the nitrogen sealing cavity is arranged in the compensator corrugated ring and is connected with a nitrogen system; the nitrogen purging pipe is arranged on the walking mechanism and is connected with a nitrogen system; nitrogen is introduced into the nitrogen sealing cavity and the nitrogen purging pipe through the nitrogen system, so that blast furnace ash is prevented from being deposited in the compensator corrugated ring and the walking mechanism. The utility model can effectively solve the problem of blast furnace ash scale deposition in the corrugated ring of the compensator and the walking mechanism during the operation of the glasses valve, prolong the service life of the glasses valve, and save a large amount of equipment funds.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of glasses valve equipment design and use, concretely relates to a nitrogen seal purging device. BACKGROUND

[0002] As the key cutting equipment of the blast furnace gas dust removal system and the blast furnace gas pressure recovery power generation system (TRT, Blast Furnace Top Gas Recovery Turbine Unit) in the metallurgical industry, the sealing performance of the glasses valve is crucial for the safe operation of the system. However, the glasses valve often has a valve sealing failure during use, which is mainly caused by the dust accumulation in the compensator bellows and the guide rail of the walking mechanism. The compensator bellows play a certain role in expansion and compensation in the blast furnace gas system, but due to long-term contact with the gas, dust and impurities are easily accumulated in the bellows. The bellows after dust accumulation may be hindered during expansion, causing the valve plate sealing part to fail to effectively seal the gas pipeline, and thus causing the sealing failure of the glasses valve. The walking mechanism is one of the important components of the glasses valve, which is responsible for driving the movement and positioning of the valve plate. However, dust and impurities are also easily accumulated in the guide rail, and the guide rail after dust accumulation may block the movement of the valve plate, so that the valve plate base cannot be loosened and pressed, and thus causing the sealing failure of the valve plate. The above sealing failure easily causes the opening and closing of the glasses valve to be inoperable, and the glasses valve cannot seal the gas pipeline, which seriously threatens the safety of the equipment.

[0003] Therefore, there is still room for improvement in the existing glasses valve system. SUMMARY

[0004] The main purpose of the utility model is to provide a nitrogen seal purging device, which effectively solves the problem of dust accumulation in the compensator bellows and the walking mechanism of the glasses valve during operation, prolongs the service life of the glasses valve, and saves a lot of equipment funds.

[0005] According to one aspect of the utility model, a nitrogen seal purging device is provided, which is applied to a glasses valve, the glasses valve includes a compensator bellows and a walking mechanism, and the device includes:

[0006] A nitrogen system for storing nitrogen;

[0007] A nitrogen seal cavity arranged in the compensator bellows, the nitrogen seal cavity is connected with the nitrogen system;

[0008] A nitrogen purging pipe arranged on the walking mechanism, the nitrogen purging pipe is detachably connected with the nitrogen system;

[0009] The nitrogen gas system is connected with the nitrogen sealing cavity and the nitrogen purging pipe, and nitrogen is introduced into the nitrogen sealing cavity and the nitrogen purging pipe through the nitrogen gas system to prevent the blast furnace ash from depositing inside the compensator corrugated ring and inside the walking mechanism.

[0010] According to one embodiment of the present application, the nitrogen sealing pipe is detachably connected to the nitrogen sealing cavity and the nitrogen gas system through a joint or a flange.

[0011] According to one embodiment of the present application, the nitrogen purging pipe is detachably fixed to at least one end of the walking guide rail in the walking mechanism, and is used for introducing nitrogen into the walking mechanism to purge the blast furnace ash inside the walking mechanism through nitrogen.

[0012] According to one embodiment of the present application, the nitrogen sealing cavity is configured as:

[0013] The internal pressure is higher than the external environment pressure under the action of the continuously introduced nitrogen, so as to prevent the blast furnace ash from entering the compensator corrugated ring.

[0014] According to one embodiment of the present application, the nitrogen gas system further comprises an on-off valve and a pressure stabilizing valve, the on-off valve and the pressure stabilizing valve are detachably fixed to the nitrogen gas system, the on-off valve has an open state and a closed state, in the open state, the nitrogen is controlled to be introduced into the nitrogen sealing cavity and the nitrogen purging pipe, in the closed state, the nitrogen is stopped to be introduced into the nitrogen sealing cavity and the nitrogen purging pipe, and the pressure stabilizing valve is used for controlling the flow and pressure of the nitrogen.

[0015] According to one embodiment of the present application, the nitrogen gas system is in communication connection with the spectacle valve, and is controlled by the opening and closing signals of the spectacle valve to drive the nitrogen purging valve to be opened or closed.

[0016] According to one embodiment of the present application, the nitrogen sealing pipe is detachably connected to the nitrogen sealing cavity and the nitrogen gas system through a joint or a flange.

[0017] According to one embodiment of the present application, the nitrogen purging pipe is detachably fixed to the walking mechanism and the nitrogen gas system through a joint or a flange at both ends.

[0018] According to one embodiment of the present application, the on-off valve and the pressure stabilizing valve are detachably fixed to the nitrogen gas system through a joint and a flange.

[0019] According to one embodiment of the present application, further comprising a sealing filler, the sealing filler is arranged in the nitrogen sealing cavity.

[0020] In the technical scheme of the utility model, nitrogen sealed cavity is additionally arranged in the corrugated ring, positive pressure is formed inside by inputting nitrogen, which effectively prevents external blast furnace ash from entering the inside of the corrugated ring, fundamentally solves the problem of corrugated ring jam caused by blast furnace ash, nitrogen blowing pipe is additionally arranged on the walking mechanism, nitrogen is blown into the inside of the walking mechanism to remove the blast furnace ash inside, and the smooth movement of the spectacle valve is ensured. The nitrogen sealed blowing device is reasonably arranged on the compensator corrugated ring and the walking mechanism, effectively solves the problem of blast furnace ash fouling, ensures the smooth and reliable sealing when the spectacle valve switches the valve position, prolongs the service life of the spectacle valve, and reduces the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and obviously, the drawings in the following description are only some implementation cases of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0022] Figure 1 A schematic view of the nitrogen sealed blowing device according to the embodiments of the utility model is shown.

[0023] Figure 2 Another schematic view of the nitrogen sealed blowing device according to the embodiments of the utility model is shown.

[0024] Explanation of reference signs:

[0025] 1, compensator corrugated ring, 2, walking mechanism, 3, nitrogen sealed cavity, 4, nitrogen blowing pipe, 5, nitrogen sealed pipe, 6, sealing filler, 7, walking guide rail, 8, "through hole" position, 9, valve plate body, 10, "blind plate" position, 11, chain wheel, 12, walking guide wheel, 13, chain. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will be further described in detail according to specific embodiments and referring to the drawings.

[0027] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0028] The nitrogen sealing and blowing device is used for compensator bellows and guide rail of a walking mechanism, and is used for preventing the deposition of blast furnace dust in the compensator bellows and the walking mechanism. Figure 1 The nitrogen sealing and blowing device is used for compensator bellows and guide rail of a walking mechanism, and is used for preventing the deposition of blast furnace dust in the compensator bellows and the walking mechanism.

[0029] In some embodiments, the nitrogen sealing and blowing device is used for preventing the deposition of blast furnace dust in the compensator bellows and the walking mechanism.

[0030] In some embodiments, the nitrogen sealing and blowing device is used for preventing the deposition of blast furnace dust in the compensator bellows and the walking mechanism.

[0031] The utility model discloses a technical scheme, through the above technical transformation and the daily operation maintenance of standard, make the glasses valve reach the opening and closing normal use requirement, reduce the daily maintenance difficulty, avoid the glasses valve walking mechanism's guide rail dust and compensator corrugated ring dust jamming accident, ensure the safe operation of gas pipe network.

[0032] In some embodiments, also comprising nitrogen sealing pipe 5, nitrogen sealing pipe 5 both ends are detachable connection in nitrogen sealing cavity 3 and nitrogen system respectively, for the nitrogen into nitrogen sealing cavity 3. Wherein, can install one or more nitrogen sealing pipe 5 in the nitrogen sealing cavity 3 cavity four around arbitrary position.

[0033] In some embodiments, nitrogen blowing pipe 4 is detachable fixed in at least one end of walking mechanism 2 both ends, for the nitrogen into walking mechanism 2 to pass through nitrogen blowing walking mechanism 2 internal blast furnace ash.

[0034] In some embodiments, nitrogen sealing cavity 3 is configured: under the action of the continuous nitrogen into its internal gas pressure is higher than the external environment gas pressure, to prevent blast furnace ash into compensator corrugated ring 1.

[0035] In some embodiments, nitrogen sealing cavity 3 is a closed space for isolating compensator corrugated ring 1 and surrounding environment, for protecting the running environment of compensator corrugated ring 1 is not influenced by blast furnace ash. Nitrogen sealing cavity 3 is introduced nitrogen through nitrogen sealing pipe 3 to maintain its internal gas pressure is higher than the external environment gas pressure in the structure design, that is, nitrogen sealing cavity 3 keeps the positive pressure state. In the positive pressure state, blast furnace ash is difficult to overcome the positive pressure and flow into the inside of compensator corrugated ring 1, so as not to cause the blast furnace ash accumulation in the inside of compensator corrugated ring 1.

[0036] In some embodiments, the nitrogen system also includes on-off valve and pressure stabilizing valve, and the on-off valve and the pressure stabilizing valve are detachably fixed to the nitrogen system. The on-off valve has an open state and a closed state. In the open state, the nitrogen is controlled to flow into the nitrogen sealing cavity 3 and the nitrogen blowing pipe 4. In the closed state, the nitrogen is stopped from flowing into the nitrogen sealing cavity 3 and the nitrogen blowing pipe 4. The pressure stabilizing valve is used to control the flow and pressure of the nitrogen.

[0037] In some embodiments, the pipeline layout of the nitrogen system is consistent with the structure of the glasses valve and the on-site environment. The pipeline is connected to the nitrogen sealing cavity 3 and the nitrogen blowing pipe 4, respectively. The on-off valve, the pressure stabilizing valve, and the pipeline are all arranged to be replaceable and fixed by a movable joint or a flange.

[0038] In some embodiments, the nitrogen system is in communication connection with the glasses valve and is controlled by the opening and closing signals of the glasses valve to drive the on-off valve to open or close.

[0039] In some embodiments, as Figure 2As shown, the walking mechanism 2 realizes the opening and closing of the spectacle valve by switching between the "through hole" position 8 and the "blind plate" position 10. The walking guide rail 7 provides a sliding path for the valve plate body 9, and cooperates with the walking guide wheel 12 to support and guide the movement of the valve plate body 9. The chain 13 and the chain wheel 11 are the transmission system of the walking mechanism 2, which moves the valve plate body 9 to the "through hole" position 8 or the "blind plate" position 10 through driving force. During the opening and closing of the spectacle valve, the opening and closing valve of the nitrogen system is opened at the same time, and the opening and closing valve controls the flow direction of the nitrogen to the nitrogen purging pipe 4 and the nitrogen sealing pipe 5, so as to remove the blast furnace ash in the walking mechanism 2 while preventing the blast furnace ash from entering the nitrogen sealing cavity 3, avoid the failure of the spectacle valve, and ensure the safe operation of the spectacle valve. After the spectacle valve completes the opening and closing action, the opening and closing valve of the nitrogen system is closed, and the nitrogen supply is stopped.

[0040] In some embodiments, the nitrogen sealing pipe 5 is detachably connected to the nitrogen sealing cavity 3 and the nitrogen system through a loose joint or a flange.

[0041] In some embodiments, the nitrogen purging pipe 4 is detachably fixed at both ends to the walking mechanism 2 and the nitrogen system through a loose joint or a flange.

[0042] In some embodiments, the opening and closing valve and the pressure stabilizing valve are detachably fixed to the nitrogen system through a loose joint and a flange.

[0043] In some embodiments, the sealing filler 6 is further included, and the sealing filler 6 is arranged in the nitrogen sealing cavity 3.

[0044] In some embodiments, the sealing filler 6 prevents the blast furnace ash from entering the nitrogen sealing cavity 3 and the compensator bellows 1, and is arranged in the nitrogen sealing cavity 3 to enhance the sealing performance of the nitrogen sealing cavity 3 and the compensator bellows 1.

[0045] In the technical scheme of the utility model, the nitrogen sealing cavity is additionally arranged in the bellows, nitrogen is introduced to form positive pressure inside, which effectively prevents the blast furnace ash from entering the bellows, and fundamentally solves the problem of the bellows being blocked by the blast furnace ash. The nitrogen purging pipe is additionally arranged in the walking mechanism, nitrogen is blown into the walking mechanism to remove the blast furnace ash inside, and the smooth movement of the spectacle valve is ensured. The nitrogen sealing and purging device is reasonably arranged on the compensator bellows and the walking mechanism, the problem of the blast furnace ash accumulation is effectively solved, the spectacle valve is switched smoothly and reliably, the service life of the spectacle valve is prolonged, and the maintenance cost is reduced.

[0046] Those skilled in the art should understand that the discussion of any above-mentioned embodiment is merely exemplary and is not intended to suggest that the scope (including claims) of the present embodiments is limited to these examples; under the thought of the present embodiments, the above-mentioned embodiments or technical features in different embodiments can also be combined, and there are many other changes of different aspects of the present embodiments as above. In order to be brief, they are not provided in details. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiments should be included in the protection scope of the present embodiments.

Claims

1. A nitrogen seal purging apparatus characterized by, The application is applied to a spectacle valve, which comprises a compensator bellow (1) and a walking mechanism (2), and the device comprises: a nitrogen system for storing nitrogen; a nitrogen sealed cavity (3) arranged inside the compensator bellow (1), which is connected with the nitrogen system; a nitrogen blowing pipe (4) arranged on the walking mechanism (2), which is detachably connected with the nitrogen system; wherein the nitrogen system is used to introduce nitrogen into the nitrogen sealed cavity (3) and the nitrogen blowing pipe (4) to prevent the deposition of blast furnace ash inside the compensator bellow (1) and the walking mechanism (2).

2. The apparatus of claim 1, wherein, a nitrogen sealed pipe (5) which is detachably connected with the nitrogen sealed cavity (3) and the nitrogen system at both ends, and is used to introduce nitrogen into the nitrogen sealed cavity (3).

3. The apparatus of claim 1, wherein, the nitrogen blowing pipe (4) is detachably fixed on at least one end of the walking mechanism (2), and is used to introduce nitrogen into the walking mechanism (2) to blow the blast furnace ash inside the walking mechanism (2) by nitrogen.

4. The apparatus of claim 1, wherein, the nitrogen sealed cavity (3) is configured as: under the action of continuously introduced nitrogen, the internal pressure is higher than the external environment pressure, so as to prevent the blast furnace ash from entering the compensator bellow (1).

5. The apparatus of claim 1, wherein, the nitrogen system further comprises an opening and closing valve and a pressure stabilizing valve, which are detachably fixed on the nitrogen system, the opening and closing valve has an open state and a closed state, in the open state, the nitrogen is controlled to be introduced into the nitrogen sealed cavity (3) and the nitrogen blowing pipe (4), in the closed state, the nitrogen is stopped to be introduced into the nitrogen sealed cavity (3) and the nitrogen blowing pipe (4), and the pressure stabilizing valve is used to control the flow and pressure of the nitrogen.

6. The apparatus of claim 5, wherein, the nitrogen system is in communication connection with the spectacle valve, and is controlled by the opening and closing signal of the spectacle valve to drive the nitrogen blowing valve to be opened or closed.

7. The apparatus of claim 2, wherein, the nitrogen sealed pipe (5) is detachably connected with the nitrogen sealed cavity (3) and the nitrogen system by a joint or a flange.

8. The apparatus of claim 3, wherein, the nitrogen blowing pipe (4) is detachably fixed on the walking mechanism (2) and the nitrogen system by a joint or a flange at both ends.

9. The apparatus of claim 5, wherein, the opening and closing valve and the pressure stabilizing valve are detachably fixed on the nitrogen system by a joint and a flange.

10. The apparatus of claim 1, wherein, a sealing filler (6) is further arranged in the nitrogen sealed cavity (3).

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