Carbon ring sealing structure of circulating gas fan of pressure filter of PTA (pure terephthalic acid) device

Abstract

The utility model discloses a carbon ring sealing structure of a circulating gas fan of a PTA (pure terephthalic acid) device pressure filter, and relates to the technical field of sealing structures. The device comprises a first connector and a second connector, a blocking mechanism and a sealing mechanism are arranged on the first connector, and the blocking mechanism comprises a connecting assembly and a detecting assembly; the connecting assembly comprises a liquid outlet formed in the outer wall of the first connector in a communicating mode, a first guide pipe is arranged at the right end of the liquid outlet in a communicating mode, a sealing tank is fixedly connected to the right end of the first guide pipe, and a second guide pipe is arranged on the bottom face of the sealing tank in a communicating mode; the end, away from the sealing tank, of the second guide pipe is fixedly connected with a second connector, and the outer wall of the second guide pipe is fixedly connected with a liquid pump. By arranging the blocking mechanism, the pressure intensity generated by liquid circulation can be balanced with the pressure intensity in the pipeline by adjusting the power of the liquid pump, so that poisonous gas in the pipeline is prevented from leaking out.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing structures, in particular to a carbon ring sealing structure of a circulating air fan of a pressure filter of a PTA device. Background Art

[0002] In the prior art, after searching, it was found that a Chinese patent disclosed "a carbon ring sealing structure for circulating air blower of pressure filter of PTA device", and its application number is "CN201721898702.1". This patent mainly changes the flushing medium to injected nitrogen. After nitrogen enters the system, it will not cause the temperature to drop, and methyl benzoic acid will not crystallize and block the pipeline and blade channel; carbon ring seal is adopted, and the shell deformation is not sensitive to the carbon ring seal, which reduces the failure rate and improves the stability of fan operation; the cost of carbon ring seal spare parts is low, the installation accuracy requirements are reduced, and the technical ability requirements of workers are also reduced accordingly, the spare parts cost is reduced, and the carbon ring adopts a split structure, which saves the replacement time of the carbon ring and improves work efficiency. After the transformation, the number of forced maintenance of shaft seal leakage is significantly reduced, making the equipment operation more stable and the process system more stable. The workload of equipment maintenance is reduced, and the split structure does not need to remove the bearing and fan housing, inlet and outlet connecting pipelines, etc. when replacing the carbon ring seal. The sealing carbon ring can be replaced by simply separating the housing of the carbon ring seal. The carbon ring seal is a radial seal, and the deformation and axial movement of the fan housing have almost no effect on the carbon ring seal, and the damage frequency is greatly reduced. Mechanical seal spare parts are about 19,000 yuan / set, and carbon ring seal spare parts are about 9,000 yuan / set, and the spare parts cost is significantly reduced.

[0003] After long-term use of the pipeline, the joints are likely to age, causing trace gas leakage from the joints. The existing nitrogen circulation fan shaft end seal is a carbon ring seal, which has a trace leakage problem due to structural reasons. The leaked gas during the vulcanization of the conversion furnace catalyst contains toxic gases, which poses a risk of poisoning to personnel and a major safety hazard in production. Utility Model Content

[0004] The utility model aims to provide a carbon ring sealing structure for a circulating air fan of a pressure filter of a PTA device. By providing a barrier mechanism, the pressure generated by the liquid circulation is balanced with the pressure inside the pipeline, thereby preventing the toxic gas in the pipeline from leaking out. The utility model solves the problem that the shaft end seal of the existing nitrogen circulating fan is a carbon ring seal, which has a trace leakage problem due to structural reasons, and the problem that toxic gas is leaked in the gas during the vulcanization of the catalyst in the conversion furnace.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model discloses a carbon ring sealing structure for a circulating air blower of a pressure filter of a PTA device, comprising a first connector and a second connector, wherein a blocking mechanism and a sealing mechanism are arranged on the first connector, and the blocking mechanism comprises a connecting component and a detecting component;

[0007] The connecting assembly includes a liquid outlet connected to the outer wall of a first connecting head, a first conduit is connected to the right end of the liquid outlet, a sealing tank is fixedly connected to the right end of the first conduit, the right end of the first conduit extends to the interior of the sealing tank, a second conduit is connected to the bottom surface of the sealing tank, a liquid inlet is connected to the outer wall of the second connecting head, an end of the second conduit away from the sealing tank is fixedly connected to the left end of the liquid inlet, the interior of the second conduit is connected to the interior of the liquid inlet, and a liquid pump is fixedly connected to the outer wall of the second conduit.

[0008] Furthermore, the detection component includes a sliding rod slidably connected to the top surface of the sealed can, the bottom end of the sliding rod extends to the interior of the sealed can, the bottom end of the sliding rod is fixedly connected to a piston, the piston is slidably connected to the inner wall of the sealed can, a first spring is wound around the sliding rod, the top end of the first spring is fixedly connected to the inner wall of the sealed can, and the bottom end of the first spring is fixedly connected to the top surface of the piston.

[0009] Furthermore, the sealing mechanism includes a positioning assembly, a sealing assembly and a clamp assembly. The positioning assembly is provided with a plurality of slots on the first connector and the second connector. The inner walls of the plurality of slots are slidably connected with the first carbon ring and the second carbon ring.

[0010] Furthermore, the second carbon ring and the first carbon ring are both in a semicircular ring shape.

[0011] Furthermore, a bolt is threadedly connected between the first connecting head and the second connecting head.

[0012] Furthermore, the sealing assembly includes hinge shafts that penetrate the first carbon ring, the hinge shafts are fixedly connected to the first carbon ring, the second carbon ring is rotatably connected to the hinge shaft, and several of the first carbon rings and the second carbon rings are provided with connecting grooves, and the two connecting grooves are adapted to each other.

[0013] Furthermore, the clamp assembly includes grooves formed on a plurality of first carbon rings and second carbon rings, a second spring is fixedly connected between the first carbon rings and the second carbon rings, and the second spring is located inside the grooves.

[0014] The utility model has the following beneficial effects:

[0015] 1. By setting up a barrier mechanism, the power of the liquid pump can be adjusted to balance the pressure generated by the liquid circulation with the pressure inside the pipeline, thereby avoiding the leakage of toxic gases in the pipeline, thereby ensuring that the staff can carry out their work normally and safely. When a leak occurs in the pipeline, it is often not discovered in time. At this time, the height of the slide bar can be observed. When the air pressure increases, the slide bar will drive the slide bar to move upward, so that the gas leakage can be detected in time.

[0016] 2. By providing a sealing mechanism, the two groups of carbon rings can produce a sealing effect on the connection between the two pipes. In conjunction with the liquid inlet, the barrier liquid in the liquid inlet can wrap the connection between the two pipes after flowing between the two groups of carbon rings, so that the barrier liquid can perform a barrier treatment on the connection, thereby ensuring the sealing of the entire device.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a front cross-sectional structural schematic diagram of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the second connector of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the first carbon ring of the utility model;

[0023] Figure 5 For this utility model Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1. First connector; 2. Blocking mechanism; 3. Sealing mechanism; 4. Bolt; 11. Second connector; 21. Liquid outlet; 22. Sealing tank; 23. First conduit; 24. Liquid pump; 25. Second conduit; 26. Liquid inlet; 27. Sliding rod; 28. Piston; 29. ​​First spring; 31. Slot; 32. First carbon ring; 33. Second carbon ring; 34. Articulated shaft; 35. Groove; 36. Second spring; 37. Connecting groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-5 As shown, the utility model is a carbon ring sealing structure of a circulating air blower of a pressure filter of a PTA device, comprising a first connector 1 and a second connector 11, a blocking mechanism 2 and a sealing mechanism 3 are arranged on the first connector 1, and the blocking mechanism 2 comprises a connecting component and a detecting component;

[0028] The connection component includes a liquid outlet 21 connected to the outer wall of the first connector 1, a first conduit 23 is connected to the right end of the liquid outlet 21, a sealing tank 22 is fixedly connected to the right end of the first conduit 23, the right end of the first conduit 23 extends to the inside of the sealing tank 22, a second conduit 25 is connected to the bottom surface of the sealing tank 22, a liquid inlet 26 is connected to the outer wall of the second connector 11, an end of the second conduit 25 away from the sealing tank 22 is fixedly connected to the left end of the liquid inlet 26, the interior of the second conduit 25 is connected to the interior of the liquid inlet 26, and the outer wall of the second conduit 25 is fixedly connected to a liquid pump 24, and a detection component It includes a slide bar 27 slidably connected to the top surface of the sealed tank 22, the bottom end of the slide bar 27 extends to the inside of the sealed tank 22, the bottom end of the slide bar 27 is fixedly connected to a piston 28, the piston 28 is slidably connected to the inner wall of the sealed tank 22, a first spring 29 is wound around the slide bar 27, the top end of the first spring 29 is fixedly connected to the inner wall of the sealed tank 22, and the bottom end of the first spring 29 is fixedly connected to the top surface of the piston 28. By providing a blocking mechanism 2, the pressure generated by the liquid circulation is balanced with the pressure inside the pipeline, thereby preventing the toxic gas in the pipeline from leaking out, thereby ensuring that the staff can work normally and safely;

[0029] The sealing mechanism 3 includes a positioning component, a sealing component and a clamp component. The positioning component is provided with a plurality of slots 31 on the first connector 1 and the second connector 11. The inner walls of the plurality of slots 31 are slidably connected with a first carbon ring 32 and a second carbon ring 33. The second carbon ring 33 and the first carbon ring 32 are both semicircular ring-shaped. A bolt 4 is threadedly connected between the first connector 1 and the second connector 11. The sealing component includes a hinge shaft 34 that passes through the first carbon ring 32. The hinge shaft 34 is fixedly connected to the first carbon ring 32. The second carbon ring 33 is rotatably connected to the hinge shaft 34. The plurality of first carbon rings 32 and the second carbon rings 33 are provided with a plurality of slots 31. A connecting groove 37 is provided, and the two connecting grooves 37 are adapted to each other. The clamp assembly includes grooves 35 that are all opened on a plurality of first carbon rings 32 and second carbon rings 33. A second spring 36 is fixedly connected between the first carbon ring 32 and the second carbon ring 33. The second spring 36 is located inside the groove 35. By providing a sealing mechanism 3, the two groups of carbon rings produce a sealing effect on the connection between the two pipes. In conjunction with the liquid inlet 26, the barrier liquid in the liquid inlet 26 can wrap the connection between the two pipes after flowing between the two groups of carbon rings, so that the barrier liquid performs a barrier treatment on the connection, thereby ensuring the sealing of the overall device.

[0030] A specific application of this embodiment is as follows: by providing a barrier mechanism 2, the sealing tank 22 is filled with a barrier liquid. After the two pipes are welded, the second connector 11 and the first connector 1 are sleeved on the outer walls of the two pipes, and the connection is installed at the liquid inlet 26. After the pipes are used for a long time, the connection is likely to age, resulting in a trace amount of gas leaking from the connection. At this time, the liquid pump 24 can be adjusted to allow the liquid in the sealing tank 22 to be introduced into the second conduit 25 through the liquid pump 24. After the barrier liquid flows through the liquid inlet 26, the second connector 11 and the first connector 1, it is introduced into the first conduit 23 through the liquid outlet 21 and returns to the inside of the sealing tank 22 through the first conduit 23 to form a circulation system. The ring effect, at this time, the power of the liquid pump 24 can be adjusted to balance the pressure generated by the liquid circulation with the pressure inside the pipeline, so as to avoid the leakage of toxic gases in the pipeline, thereby ensuring that the staff can carry out their work normally and safely. When a pipeline leaks, it is often not possible to find it in time. At this time, the height of the slide bar 27 can be observed. When the air pressure increases, the slide bar will drive the slide bar 27 to move upward, so as to detect the gas leakage in time, and the piston 28 and the first spring 29 cooperate with each other. When the air pressure is balanced, the first spring 29 will reset, so that the air pressure difference between the inside of the pipeline and the external barrier liquid can be judged according to the height of the slide bar 27, so that the power of the liquid pump 24 can be accurately adjusted;

[0031] By providing the sealing mechanism 3, the slot 31 cooperates with the first carbon ring 32 and the second carbon ring 33. After the first connector 1 and the second connector 11 are fixed by the bolts 4, the slot 31 and the first carbon ring 32 can be clamped inside the slot 31. At this time, a small gap will be left at the connection between the slot 31 and the first carbon ring 32 and the second carbon ring 33. After the pipe is inserted between the first carbon ring 32 and the second carbon ring 33, the outer diameter of the pipe is larger than the inner diameter of the first carbon ring 32 and the second carbon ring 33, so that the two can be stretched apart. The hinge shaft 34 is closed to open the connection groove 37 at the connection between the first carbon ring 32 and the second carbon ring 33. The tension of the second spring 36 is cooperated to make the first carbon ring 32 and the second carbon ring 33 fit tightly on the outer wall of the pipe, so that the two groups of carbon rings have a sealing effect on the connection between the two pipes. The liquid inlet 26 is cooperated to make the barrier liquid in the liquid inlet 26 wrap the connection between the two pipes after flowing into the two groups of carbon rings, so that the barrier liquid performs a barrier treatment on the connection, thereby ensuring the sealing of the overall device.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A carbon ring sealing structure for a circulating air blower of a pressure filter of a PTA device, comprising a first connector (1) and a second connector (11), characterized in that: The first connector (1) is provided with a blocking mechanism (2) and a sealing mechanism (3), wherein the blocking mechanism (2) comprises a connecting component and a detecting component; The connection assembly comprises a liquid outlet (21) arranged in communication with the outer wall of the first connector (1); the right end of the liquid outlet (21) is arranged in communication with a first conduit (23); the right end of the first conduit (23) is fixedly connected with a sealed tank (22); the right end of the first conduit (23) extends to the interior of the sealed tank (22); a second conduit (25) is arranged in communication with the bottom surface of the sealed tank (22); the outer wall of the second connector (11) is arranged in communication with a liquid inlet (26); one end of the second conduit (25) away from the sealed tank (22) is fixedly connected to the left end of the liquid inlet (26); the interior of the second conduit (25) is communicated with the interior of the liquid inlet (26); and the outer wall of the second conduit (25) is fixedly connected with a liquid pump (24).

2. The carbon ring sealing structure of the circulating air blower of the pressure filter of the PTA device according to claim 1 is characterized in that: The detection assembly comprises a slide rod (27) slidably connected to the top surface of the sealing can (22), the bottom end of the slide rod (27) extends to the inside of the sealing can (22), the bottom end of the slide rod (27) is fixedly connected to a piston (28), the piston (28) is slidably connected to the inner wall of the sealing can (22), a first spring (29) is wound around the slide rod (27), the top end of the first spring (29) is fixedly connected to the inner wall of the sealing can (22), and the bottom end of the first spring (29) is fixedly connected to the top surface of the piston (28).

3. The carbon ring sealing structure of the circulating air blower of the pressure filter of the PTA device according to claim 1 is characterized in that: The sealing mechanism (3) comprises a positioning assembly, a sealing assembly and a clamp assembly. The positioning assembly is provided with a plurality of slots (31) on the first connector (1) and the second connector (11). The inner walls of the plurality of slots (31) are slidably connected with a first carbon ring (32) and a second carbon ring (33).

4. A carbon ring sealing structure for circulating air blower of a pressure filter of a PTA device according to claim 3, characterized in that: The second carbon ring (33) and the first carbon ring (32) are both semicircular.

5. The carbon ring sealing structure of the circulating air blower of the pressure filter of the PTA device according to claim 1 is characterized in that: A bolt (4) is threadedly connected between the first connecting head (1) and the second connecting head (11).

6. A carbon ring sealing structure for circulating air blower of a pressure filter of a PTA device according to claim 4, characterized in that: The sealing assembly comprises a hinge shaft (34) penetrating through the first carbon ring (32), the hinge shaft (34) being fixedly connected to the first carbon ring (32), a second carbon ring (33) being rotatably connected to the hinge shaft (34), and a plurality of the first carbon rings (32) and the second carbon rings (33) are provided with connecting grooves (37), and the two connecting grooves (37) are adapted to each other.

7. A carbon ring sealing structure for circulating air blower of a pressure filter of a PTA device according to claim 6, characterized in that: The clamp assembly comprises grooves (35) each formed on a plurality of first carbon rings (32) and second carbon rings (33); a second spring (36) is fixedly connected between the first carbon ring (32) and the second carbon ring (33); and the second spring (36) is located inside the groove (35).

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