CN212300736U - Sealing performance detection system for rotary joint of cut tobacco dryer - Google Patents

Abstract

The utility model relates to a cut-tobacco drier rotary joint's leakproofness detecting system, it includes: a swivel joint, comprising: the cylinder is internally provided with an inner shaft and a sealing element, and an input channel and an output channel are arranged inside the inner shaft; an input tube in communication with the input channel; and an output pipe communicated with the output channel; and an auxiliary device comprising: the support is connected with the cylinder; the heat exchange tube is arranged on the support, the first end of the heat exchange tube is connected with the input channel, and the second end of the heat exchange tube is connected with the output channel; and the heat exchange box is internally preset with a heat exchange medium, and at least part of the heat exchange tube is configured to enter the heat exchange medium. The utility model discloses an operating condition of auxiliary assembly simulation rotary joint on the cylinder of cut-tobacco drier detects rotary joint then and whether leaks, convenient operation, and labour saving and time saving is sealed good at the definite rotary joint, does not have the back of leaking, installs rotary joint on the cut-tobacco drier again, can not influence the production operation.

Description

Sealing performance detection system for rotary joint of cut tobacco dryer

Technical Field

The utility model relates to a tobacco equipment field especially relates to a cut-tobacco drier rotary joint's leakproofness detecting system.

Background

The sheet cut tobacco dryer adopts a composite drying technology to remove part of moisture in cut tobacco, meets the processing requirements of subsequent procedures and improves and enhances the sensory quality of the cut tobacco. The rotary joint is a device for steam and condensed water to enter and exit the roller, and the stability of the steam pressure in the roller and the moisture content of cut tobacco at an outlet can be directly influenced if the rotary joint can normally and effectively operate. However, after the cut-tobacco drier runs for a certain time, because steam pressure impact and rotation coaxiality along with the roller are difficult to guarantee, the graphite ring in the rotary joint is often worn and abraded, so that the problems that: 1) the rotary joint leaks water or steam emits outwards, and even abnormal sound and vibration are generated; 2) part of steam flees into the condensate water pipeline, and because of the great steam pressure, the condensate water in the drum can not be discharged in time, and the drum wall temperature drops, and the dry pipe tobacco ability reduces, and export pipe tobacco moisture content fluctuation is great and surpasss the technological requirement, causes the technology accident.

At present, the maintenance operation of the rotary joint is mainly to replace graphite seal. However, the repaired rotary joint is subjected to tightness inspection without detection equipment, so that the leakage of the repaired rotary joint still occurs after the repaired rotary joint is installed on a tobacco dryer, and the rotary joint has to be disassembled again and repaired again. Because the quality of the rotary joint reaches hundreds of kilograms and is positioned at the high position of the cut tobacco dryer, the installation and disassembly operations are very complicated, time and labor are wasted, and the production operation and the maintenance operation are seriously influenced.

Disclosure of Invention

Some embodiments of the utility model provide a cut-tobacco drier rotary joint's leakproofness detecting system for alleviate the unable problem that detects of rotary joint's leakproofness.

Some embodiments of the utility model provide a cut-tobacco drier rotary joint's leakproofness detecting system, it includes:

a swivel joint, comprising:

a cylinder body, an inner shaft and a sealing element are arranged in the cylinder body, and an input channel is arranged in the inner shaft

And an output channel;

an input tube in communication with the input channel; and

an output pipe communicated with the output channel; and

an auxiliary device comprising:

the support is connected with the cylinder;

a heat exchange tube arranged on the support, the first end of the heat exchange tube is connected with the input channel

A second end of the channel is connected with the output channel; and

the heat exchange box is internally preset with a heat exchange medium, and at least part of the heat exchange tube is configured to enter the heat exchange medium.

In some embodiments, the rotary joint further comprises a flange connecting the support and the cylinder, the flange comprises a sealing part, the sealing part is provided with a first through hole and a second through hole, the first through hole communicates the first end of the heat exchange tube with the input channel, and the second through hole communicates the second end of the heat exchange tube with the output channel.

In some embodiments, the auxiliary device further includes a rotating shaft rotatably disposed on the support, a first end of the rotating shaft is connected to the inner shaft, a second end of the rotating shaft is connected to the heat exchange tube, a first connecting channel and a second connecting channel are disposed in the rotating shaft, the first connecting channel connects the first end of the heat exchange tube and the input channel, and the second connecting channel connects the second end of the heat exchange tube and the output channel.

In some embodiments, the auxiliary device further comprises:

the motor is arranged on the support;

the driving wheel is arranged on an output shaft of the motor;

the driven wheel is arranged on the rotating shaft; and

and the belt is connected with the driving wheel and the driven wheel.

In some embodiments, the rotary joint further includes a flange connecting the support and the cylinder, the flange includes a sealing portion, the sealing portion is provided with a first through hole and a second through hole, the first through hole communicates the first connecting channel and the input channel, and the second through hole communicates the second connecting channel and the output channel.

In some embodiments, the auxiliary equipment further includes a hanger provided on the support and located above the rotary joint, the hanger suspending the rotary joint.

In some embodiments, the hanger comprises a spring hanger.

In some embodiments, a first annular chamber and a second annular chamber are provided in the barrel, the first annular chamber communicates with the input pipe and the input channel, the second annular chamber communicates with the output pipe and the output channel, and the seal is provided between the first annular chamber and the second annular chamber and configured to isolate the first annular chamber and the second annular chamber.

In some embodiments, the input tubes comprise first and second input tubes, the output tubes comprise first and second output tubes, and the heat exchange tubes comprise first and second heat exchange tubes; the input channels comprise a first input channel and a second input channel, and the output channels comprise a first output channel and a second output channel;

the first end of the first heat exchange tube is connected with the first input channel, the first input channel is connected with the first input tube, the second end of the first heat exchange tube is connected with the first output channel, and the first output channel is connected with the first output tube;

the first end of the second heat exchange tube is connected with the second input channel, the second input channel is connected with the second input tube, the second end of the second heat exchange tube is connected with the second output channel, and the second output channel is connected with the second output tube.

In some embodiments, two first annular chambers and two second annular chambers are provided in the barrel;

one of said first annular chambers communicating said first inlet pipe with said first inlet passage, and the other of said first annular chambers communicating said second inlet pipe with said second inlet passage;

one of the second annular chambers communicates with the first output tube and the first output passage, and the other of the second annular chambers communicates with the second output tube and the second output passage;

the seals are disposed between the two first annular chambers, between the two second annular chambers, and between the first annular chambers and the second annular chambers, respectively, and are configured to isolate the annular chambers.

Based on the technical scheme, the utility model discloses following beneficial effect has at least:

in some embodiments, the working state of the rotary joint on the roller of the cut-tobacco drier is simulated through the auxiliary equipment, whether the rotary joint leaks or not is detected, the operation is convenient, time and labor are saved, and after the rotary joint is determined to be well sealed and not leak, the rotary joint is installed on the cut-tobacco drier, so that the production operation cannot be influenced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic view of a system for leak testing a rotary joint of a cut-tobacco dryer according to some embodiments of the present invention;

fig. 2 is a schematic perspective view of a rotary joint of a cut-tobacco drier according to some embodiments of the present invention;

fig. 3 is a schematic cross-sectional view of a rotary joint of a cut-tobacco dryer according to some embodiments of the present invention;

fig. 4 is a schematic view of an auxiliary device provided in accordance with some embodiments of the present invention;

fig. 5 is a schematic partial cross-sectional view of an auxiliary device provided in accordance with some embodiments of the present invention.

The reference numbers in the drawings illustrate the following:

10-a rotary joint; 11-a barrel body; 12-an input tube; 121-a first input pipe; 122-a second input pipe; 13-an output pipe; 131-a first output pipe; 132-a second output pipe; 14-an inner shaft; 15-input channel; 151-first input channel; 152-a second input channel; 16-an output channel; 17-a flange; 170-sealing part; 171-a first via; 172-second via; 18-a seal; 191-a first ring cavity; 192-a second ring cavity;

20-auxiliary equipment; 21-a support; 22-heat exchange tubes; 221-a first heat exchange tube; 222-a second heat exchange tube; 23-a heat exchange box; 24-a rotating shaft; 25-a motor; 26-a driving wheel; 27-a driven wheel; 28-a belt; 29-a hanger; 210-bearing seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the invention.

As shown in fig. 1, some embodiments provide a system for detecting the sealing performance of a rotary joint of a cut-tobacco drier, which includes a rotary joint 10 and an auxiliary device 20.

As shown in fig. 2 and 3, the rotary joint 10 includes a cylinder 11, an inlet pipe 12, and an outlet pipe 13.

As shown in fig. 3, an inner shaft 14 and a seal 18 are provided in the cylinder 11, and an input passage 15 and an output passage 16 are provided in the inner shaft 14.

The inlet pipe 12 communicates with an inlet passage 15. The output pipe 13 communicates with the output passage 16.

As shown in fig. 4 and 5, the auxiliary equipment 20 includes a support 21, a heat exchange pipe 22, and a heat exchange tank 23.

The holder 21 is connected to the cylinder 11. The heat exchange tube 22 is arranged on the support 21, a first end of the heat exchange tube 22 is connected with the input channel 15, and a second end of the heat exchange tube 22 is connected with the output channel 16.

A heat exchange medium is preset in the heat exchange tank 23, and at least part of the heat exchange tubes 22 is configured to enter the heat exchange medium.

In some embodiments, the auxiliary device 20 is provided for simulating the operation of the rotary joint 10 on the cylinder of a cut-tobacco dryer. Before detection, the cylinder 11 of the rotary joint 10 is fixed on a support 21, the input channel 15 of the inner shaft 14 is respectively communicated with the input pipe 12 and the heat exchange pipe 22, and the output channel 16 is respectively communicated with the output pipe 13 and the heat exchange pipe 22.

In the detection process, steam is sent to the input channel 15 through the input pipe 12, the steam reaches the heat exchange pipe 22 through the input channel 15, the steam generates condensed water after the heat exchange pipe 22 exchanges heat with a heat exchange medium in the heat exchange box 23, the generated condensed water is discharged through the output channel 16 and the output pipe 13 in sequence, in the process, if the steam overflows from the output pipe 13, it is determined that the sealing element 18 inside the rotary joint 10 is invalid, the rotary joint 10 is maintained at the moment, and the detection process is convenient to operate. The method of determining failure of the seal 18 inside the rotary joint 10 may be observed manually.

Because rotary joint 10 weighs hundreds of kilograms to the cut-tobacco drier is located the eminence, and installation rotary joint 10 is inconvenient, and if install on the cut-tobacco drier at rotary joint 10, when discovering rotary joint 10 and leaking in the course of the work, then need dismantle rotary joint 10, install to the cut-tobacco drier again after carrying out the maintenance, the installation dismantlement process is very complicated, takes trouble hard, seriously influences production operation.

This is disclosed simulates the operating condition of rotary joint 10 on the cylinder of cut-tobacco drier through auxiliary equipment 20, then detects whether rotary joint 10 leaks, convenient operation, labour saving and time saving, and after confirming that rotary joint 10 is sealed well and does not have the leakage, installs rotary joint 10 on the cut-tobacco drier again, can not influence the production operation.

In some embodiments, the rotary joint 10 further includes a flange 17, the flange 17 connects the support 21 with the cylinder 11, the flange 17 includes a sealing portion 170, the sealing portion 170 is provided with a first through hole 171 and a second through hole 172, the first through hole 171 communicates the first end of the heat exchange tube 22 with the input channel 15, and the second through hole 172 communicates the second end of the heat exchange tube 22 with the output channel 16.

In the detection process, if steam or condensate water overflows from the joint of the flange 17 between the support 21 and the cylinder 11, the sealing failure of the joint of the flange 17 between the support 21 and the cylinder 11 is determined, at the moment, the rotary joint 10 can be maintained, and the detection process is convenient to operate. The method of determining failure of the seal at the flange 17 connection between the support 21 and the barrel 11 includes manual observation.

In some embodiments, the auxiliary device 20 further comprises a rotating shaft 24, the rotating shaft 24 is rotatably disposed on the support 21, a first end of the rotating shaft 24 is connected to the inner shaft 14, a second end of the rotating shaft 24 is connected to the heat exchange tube 22, a first connecting channel and a second connecting channel are disposed in the rotating shaft 24, the first connecting channel connects the first end of the heat exchange tube 22 and the input channel 15, and the second connecting channel connects the second end of the heat exchange tube 22 and the output channel 16.

Since the rotary joint 10 is mounted on the cut-tobacco drier, the roller of the cut-tobacco drier continuously rotates during the cut-tobacco drying process, and the inner shaft 14 of the rotary joint 10 also rotates along with the roller, in some embodiments of the present disclosure, the rotating shaft 24 is disposed on the support 21, and the heat exchange pipe 22 and the inner shaft 14 are driven to rotate by the rotating shaft 24, so as to simulate the working state of the rotary joint 10 on the cut-tobacco drier more truly. In the process that the rotating shaft 24 drives the heat exchange tube 22 and the inner shaft 14 to rotate, the tightness of the rotary joint 10 is detected, and the detection result is more accurate.

In some embodiments, as shown in fig. 5, the auxiliary device 20 further includes a motor 25, a drive pulley 26, a driven pulley 27, and a belt 28.

The motor 25 is arranged on the support 21; the driving wheel 26 is arranged on the output shaft of the motor 25; the driven wheel 27 is arranged on the rotating shaft 24; a belt 28 connects the driving pulley 26 and the driven pulley 27. The motor 25 provides power to drive the driving wheel 26 to rotate, the driving wheel 26 drives the driven wheel 27 to rotate through the belt 28, and the driven wheel 27 drives the rotating shaft 24 to rotate.

After the rotary joint 10 is installed in place and the steam pipeline is connected, the motor 25 transmits power to the rotating shaft 24 through the driving wheel 26, the belt 28 and the driven wheel 27. And one end of the rotating shaft 24 is connected with the heat exchange tube 22, and the other end is connected with the inner shaft 14 of the rotary joint 10, so that the heat exchange tube 22 and the inner shaft 14 can be driven to rotate at the same time.

The heat exchange tubes 22 may enclose an annular shape, for example: the heat exchange tubes 22 can be enclosed into a square ring, and part of the heat exchange tubes 22 are positioned in the heat exchange medium in the heat exchange box 23 to exchange heat with the heat exchange medium in the process of rotating along with the rotating shaft 24.

Of course, the driving mechanism of the rotary shaft 24 is not limited to the forms of the motor 25, the driving pulley 26, the driven pulley 27, and the belt 28 described above.

In some embodiments, the auxiliary device 20 includes a bearing seat 210 and a bearing disposed in the bearing seat 210, the bearing supports the rotation of the rotation shaft 24, and the cylinder 11 of the rotary joint 10 is fixedly disposed on the bearing seat 210.

In some embodiments, the rotary joint 10 further includes a flange 17, the flange 17 connects the support 21 with the cylinder 11, the flange 17 includes a sealing portion 170, the sealing portion 170 is provided with a first through hole 171 and a second through hole 172, the first through hole 171 communicates with the first connecting passage and the input passage 15, and the second through hole 172 communicates with the second connecting passage and the output passage 16.

Steam or condensate overflows at the flange 17 joint between the support 21 and the barrel 11, and the sealing failure at the flange 17 joint between the support 21 and the barrel 11 is determined.

In some embodiments, the auxiliary equipment 20 further comprises a hanger 29, the hanger 29 is disposed on the support 21 and above the rotary joint 10, and the hanger 29 hangs the rotary joint 10.

In some embodiments, hangers 29 comprise spring hangers. The hook of the spring hanger hooks the lifting lug on the cylinder 11 of the rotary joint 10 and can adjust the spring tension to a specified value.

In some embodiments, a first annular chamber 191 and a second annular chamber 192 are provided in the barrel 11, the first annular chamber 191 communicates with the input pipe 12 and the input channel 15, the second annular chamber 192 communicates with the output pipe 13 and the output channel 16, and a seal 18 is provided between the first annular chamber 191 and the second annular chamber 192 and configured to isolate the first annular chamber 191 and the second annular chamber 192.

In some embodiments, the rotating structure 10 includes two flow path paths. The input pipe 12 includes a first input pipe 121 and a second input pipe 122, and the output pipe 13 includes a first output pipe 131 and a second output pipe 132. Correspondingly, the heat exchange pipe 22 comprises a first heat exchange pipe 221 and a second heat exchange pipe 222; the input channels 15 include a first input channel 151 and a second input channel 152, and the output channels 16 include a first output channel and a second output channel.

In the first flow path: the first end of the first heat exchange tube 221 is connected to the first input channel 151, the first input channel 151 is connected to the first input tube 121, the second end of the first heat exchange tube 221 is connected to the first output channel, and the first output channel is connected to the first output tube 131.

In the second flow path: a first end of the second heat exchange tube 222 is connected to the second input channel 152, the second input channel 152 is connected to the second input tube 122, a second end of the second heat exchange tube 222 is connected to the second output channel, and the second output channel is connected to the second output tube 132.

Steam is fed into the two heat exchange pipes 22 through the two flow paths, so that the situation that two groups of heat exchange pieces are arranged in the roller of the cut tobacco dryer for improving the cut tobacco drying effect under the condition of larger volume of the cut tobacco dryer is simulated.

In some embodiments, two first annular chambers 191 and two second annular chambers 192 are provided within the barrel 11.

One of the first annular chambers 191 communicates the first inlet conduit 121 with the first inlet passage 151, and the other of the first annular chambers 191 communicates the second inlet conduit 122 with the second inlet passage 152.

One of the second annular chambers 192 communicates with the first outlet pipe 131 and the first outlet passage, and the other second annular chamber 192 communicates with the second outlet pipe 132 and the second outlet passage.

The sealing members 18 are respectively disposed between the two first annular cavities 191, between the two second annular cavities 192, and between the first annular cavities 191 and the second annular cavities 192, and the sealing members 18 are configured to isolate the annular cavities and prevent the steam pipeline and the condensed water pipeline from mixing with each other.

Some embodiments provide a method for detecting the sealing performance of a rotary joint of a cut-tobacco drier, which uses the system for detecting the sealing performance of the rotary joint of the cut-tobacco drier, and the method for detecting the sealing performance comprises the following steps:

a first detection process: the steam is sent to the input channel 15 through the input pipe 12, the steam reaches the heat exchange pipe 22 through the input channel 15, the steam generates condensed water after heat exchange of the heat exchange pipe 22, and the generated condensed water is discharged through the output channel 16 and the output pipe 13 in sequence.

During the first test, if there is a steam overflow in the outlet pipe 13, it is determined that the seal 18 inside the rotary joint 10 is failed.

In some embodiments, the rotary joint 10 further comprises a flange 17, the flange 17 connects the support 21 with the cylinder 11, the flange 17 comprises a sealing portion 170, the sealing portion 170 is provided with a first through hole 171 and a second through hole 172, the first through hole 171 communicates the first end of the heat exchange tube 22 with the input channel 15, and the second through hole 172 communicates the second end of the heat exchange tube 22 with the output channel 16;

in the first test, if steam or condensed water overflows from the flange 17 connection between the holder 21 and the drum 11, it is determined that the sealing at the flange 17 connection between the holder 21 and the drum 11 is failed.

In some embodiments, the auxiliary device 20 further comprises a rotating shaft 24, the rotating shaft 24 is rotatably disposed on the support 21, a first end of the rotating shaft 24 is connected to the inner shaft 14, a second end of the rotating shaft 24 is connected to the heat exchange tube 22, a first connecting channel and a second connecting channel are disposed in the rotating shaft 24, the first connecting channel connects the first end of the heat exchange tube 22 and the input channel 15, and the second connecting channel connects the second end of the heat exchange tube 22 and the output channel 16;

the sealing performance detection method further includes:

and a second detection process: the rotating shaft 24 drives the inner shaft 14 and the heat exchange tube 22 to rotate, steam is sent to the input channel 15 through the input tube 12 and reaches the heat exchange tube 22 through the input channel 15, the steam generates condensed water after heat exchange of the heat exchange tube 22, and the generated condensed water is discharged through the output channel 16 and the output tube 13 in sequence;

during the second test, if there is a steam overflow in the outlet pipe 13, it is determined that the seal 18 inside the rotary union 10 is failed.

In some embodiments, the rotary joint 10 further includes a flange 17, the flange 17 connects the support 21 with the cylinder 11, the flange 17 includes a sealing portion 170, the sealing portion 170 is provided with a first through hole 171 and a second through hole 172, the first through hole 171 communicates with the first connecting passage and the input passage 15, and the second through hole 172 communicates with the second connecting passage and the output passage 16;

in the second test, if steam or condensed water overflows from the flange 17 connection between the holder 21 and the drum 11, it is determined that the sealing at the flange 17 connection between the holder 21 and the drum 11 is failed.

The following examples are an embodiment in which a rotary joint has two flow paths, and a sealing performance detection system and a sealing performance detection method for detecting the sealing performance of the rotary joint.

As shown in fig. 2 and 3, the rotary joint 10 of the tobacco dryer includes a cylinder 11, a first input pipe 121, a second input pipe 122, a first output pipe 131 and a second output pipe 132; an inner shaft 14 is axially arranged in the cylinder 11, and a first input channel 151, a second input channel 152, a first output channel and a second output channel which are parallel to each other are formed in the inner shaft 14 in parallel along the axial direction.

Formed in the cylinder 11 are a first annular chamber 191 communicating the first inlet pipe 121 and the first inlet passage 151, another first annular chamber 191 communicating the second inlet pipe 122 and the second inlet passage 152, a second annular chamber 192 communicating the first outlet pipe 131 and the first outlet passage, and another second annular chamber 192 communicating the second outlet pipe 132 and the second outlet passage.

The two first annular cavities 191, the two second annular cavities 192, and the first annular cavities 191 and the second annular cavities 192 are provided with sealing members 18, and the sealing members 18 are used for sealing and isolating the annular cavities from each other to avoid leakage of steam or condensed water.

As shown in fig. 4 and 5, the auxiliary device 20 includes a support 21, a first heat exchanging pipe 221, a second heat exchanging pipe 222, a rotation shaft 24, and a heat exchanging case 23.

The rotating shaft 24 is rotatably disposed on the support 21, and the rotating shaft 24 is supported by a bearing disposed in a bearing seat 210 on the support 21. A first end of the rotating shaft 24 is connected with the inner shaft 14, a second end of the rotating shaft 24 is connected with the first heat exchanging pipe 221 and the second heat exchanging pipe 222, and two first connecting channels and two second connecting channels are arranged in the rotating shaft 24.

The rotary joint 10 further includes a flange 17, the flange 17 connects the bearing housing 210 and the cylinder 11, the flange 17 includes a sealing portion 170, and the sealing portion 170 is provided with two first through holes 171 and two second through holes 172.

Wherein the first input pipe 121, the first input channel 151, one of the first through holes 171 of the flange 17, one of the first connection channels of the rotation shaft 24, the first heat exchange pipe 221, one of the second connection channels of the rotation shaft 24, one of the second through holes 172 of the flange 17, the first output channel, and the first output pipe 131 form a first flow path.

The first path of steam sequentially passes through the first input pipe 121, the first input channel 151, the flange 17 and the rotating shaft 24 to reach the first heat exchange pipe 221, the first path of steam exchanges heat with a heat exchange medium in the heat exchange box 24 in the first heat exchange pipe 221 to generate condensed water, and the generated condensed water is discharged sequentially through the rotating shaft 24, the flange 17, the first output channel and the first output pipe 131.

The second input pipe 122, the second input channel 152, another of the first through holes 171 of the flange 17, another of the first connection channels of the rotation shaft 24, the second heat exchange pipe 222, another of the second connection channels of the rotation shaft 24, another of the second through holes 172 of the flange 17, the second output channel, and the second output pipe 132 form a second flow path.

The second path of steam sequentially passes through the second input pipe 122, the second input channel 152, the flange 17 and the rotating shaft 24 to reach the second heat exchange pipe 222, the second path of steam exchanges heat with a heat exchange medium in the heat exchange box 24 in the second heat exchange pipe 222 to generate condensed water, and the generated condensed water is discharged sequentially passes through the rotating shaft 24, the flange 17, the second output channel and the second output pipe 132.

In the flow paths of the first path of steam and the second path of steam, if steam overflows from the output pipe, or steam or condensed water overflows from the joint of the end part of the cylinder 11 and the support 21, the sealing failure of the inside of the rotary joint 10 or the end part of the rotary joint 10 is determined, and the rotary joint 10 needs to be maintained.

The rotary joint tightness detection system is suitable for detecting the rotary joint 10 of the one-stage or two-stage cut-tobacco drier. A rotary utility test, a static seal test, and a dynamic seal test may be performed to verify the reliability of the rotary joint 10 structure.

A first detection process: static seal detection

The steam is sent to the input channel 15 through the input pipe 12, the steam reaches the heat exchange pipe 22 through the input channel 15, and condensed water generated after the heat exchange of the steam in the heat exchange pipe 22 is discharged through the output channel 16 and the output pipe 13 in sequence.

If steam or condensed water leaks from the flange joint of the rotary joint 10, the end flange seal of the rotary joint 10 fails.

If the output pipe of the rotary joint 10 has steam overflow, the internal sealing of the rotary joint 10 is failed.

And a second detection process: dynamic seal detection

The rotating shaft 24 drives the inner shaft 14 and the heat exchange tube 22 to rotate, steam is sent to the input channel 15 through the input tube 12, the steam reaches the heat exchange tube 22 through the input channel 15, and condensed water generated after the steam exchanges heat in the heat exchange tube 22 is discharged through the output channel 16 and the output tube 13 in sequence.

If steam or condensed water leaks from the flange joint of the rotary joint 10, the end flange seal of the rotary joint 10 fails.

If the output pipe of the rotary joint 10 has steam overflow, the sealing failure inside the rotary joint 10 is indicated.

After the cut-tobacco drier operates for a certain time, because of steam pressure impact and the difficulty in ensuring the coaxiality along with the rotation of the roller, a sealing element arranged in the rotary joint 10 is abraded, so that the problem of water leakage or steam leakage at a sealing flange of the rotary joint 10 is caused, or the problem that part of steam in the rotary joint 10 flows into a condensation water pipeline, and the condensed water in the roller cannot be discharged in time due to high steam pressure is caused.

Based on this, the sealing performance detection system of cut-tobacco drier rotary joint that this disclosed embodiment provided for detect rotary joint 10's sealing performance, solved because of there is not check-out test set to its sealing performance, lead to the condition that appears leaking after rotary joint 10 installs the cut-tobacco drier, prevented that repeated dismantlement, it is time-consuming and laborious, the phenomenon that seriously influences production operation and maintenance operation takes place.

The tightness detection system of the rotary joint of the cut-tobacco drier provided by the embodiment of the disclosure detects the tightness of the rotary joint 10, so that the situation that no detection equipment is used and only the cut-tobacco drier can be installed for detection is changed; static or dynamic leak tightness testing of the rotary joint 10 may be performed; the maintenance level is improved and the maintenance strength is reduced obviously.

The system for detecting the sealing performance of the rotary joint of the cut-tobacco drier provided by the embodiment of the disclosure can detect rotary joints 10 with different types and sizes, and has wide popularization and universality.

The system for detecting the sealing performance of the rotary joint of the cut-tobacco drier provided by the embodiment of the disclosure is used for detecting the sealing performance of the rotary joint 10 adopting steam as a heat conduction medium, and is particularly suitable for detecting the sealing performance of the rotary joint 10 of the cut-tobacco drier in the tobacco industry.

The sheet cut tobacco dryer adopts a composite drying technology to remove part of moisture in cut tobacco so as to meet the processing requirements of subsequent procedures and improve the sensory quality of the cut tobacco.

In the description of the present invention, it should be understood that the terms "first", "second", "third", etc. are used to define the components, and are only used for the convenience of distinguishing the components, and if not stated otherwise, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present invention.

Furthermore, the technical features of one embodiment may be combined with one or more other embodiments advantageously without explicit negatives.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims (10)

1. A system for detecting the sealing performance of a rotary joint of a cut-tobacco drier is characterized by comprising:

swivel joint (10) comprising:

the cylinder (11) is internally provided with an inner shaft (14) and a sealing element (18), and an input channel (15) and an output channel (16) are arranged inside the inner shaft (14);

an input tube (12) communicating with the input channel (15); and

an output duct (13) communicating with said output channel (16); and

auxiliary device (20) comprising:

a support (21) connected to the cylinder (11);

the heat exchange tube (22) is arranged on the support (21), the first end of the heat exchange tube (22) is connected with the input channel (15), and the second end of the heat exchange tube is connected with the output channel (16); and

the heat exchange box (23) is internally provided with a heat exchange medium, and at least part of the heat exchange tubes (22) can enter the heat exchange medium.

2. The system for detecting the tightness of a rotary joint of a cut-tobacco drier as claimed in claim 1, wherein said rotary joint (10) further comprises a flange (17), said flange (17) connects said support (21) with said cylinder (11), said flange (17) comprises a sealing portion (170), said sealing portion (170) is provided with a first through hole (171) and a second through hole (172), said first through hole (171) communicates said first end of said heat exchange pipe (22) with said inlet channel (15), said second through hole (172) communicates said second end of said heat exchange pipe (22) with said outlet channel (16).

3. The system for detecting the tightness of a rotary joint of a cut-tobacco drier as claimed in claim 1, wherein said auxiliary device (20) further comprises a rotating shaft (24), said rotating shaft (24) is rotatably disposed on said support (21), a first end of said rotating shaft (24) is connected to said inner shaft (14), a second end of said rotating shaft (24) is connected to said heat exchanging pipe (22), a first connecting channel and a second connecting channel are disposed in said rotating shaft (24), said first connecting channel connects a first end of said heat exchanging pipe (22) with said input channel (15), and said second connecting channel connects a second end of said heat exchanging pipe (22) with said output channel (16).

4. The system for detecting the tightness of a rotary joint of a cut-tobacco drier according to claim 3, wherein said auxiliary equipment (20) further comprises:

a motor (25) provided to the support (21);

a drive wheel (26) provided on an output shaft of the motor (25);

a driven wheel (27) provided to the rotary shaft (24); and

and a belt (28) connecting the driving pulley (26) and the driven pulley (27).

5. The system for detecting the tightness of a rotary joint of a cut-tobacco drier according to claim 3, wherein said rotary joint (10) further comprises a flange (17), said flange (17) connects said support (21) with said cylinder (11), said flange (17) comprises a sealing portion (170), said sealing portion (170) is provided with a first through hole (171) and a second through hole (172), said first through hole (171) communicates said first connecting channel with said inlet channel (15), said second through hole (172) communicates said second connecting channel with said outlet channel (16).

6. The system for detecting the sealing performance of the rotary joint of the cut-tobacco drier as claimed in claim 1, wherein said auxiliary equipment (20) further comprises a hanger (29), said hanger (29) is arranged on said support (21) and is located above said rotary joint (10), and said hanger (29) hangs said rotary joint (10).

7. The system of claim 6, wherein said hanger (29) comprises a spring hanger.

8. The system for detecting the tightness of a rotary joint of a cut-tobacco drier according to claim 1, wherein a first annular chamber (191) and a second annular chamber (192) are provided in the cylinder (11), the first annular chamber (191) communicating the input pipe (12) and the input channel (15), the second annular chamber (192) communicating the output pipe (13) and the output channel (16), and the sealing member (18) is provided between the first annular chamber (191) and the second annular chamber (192) and configured to isolate the first annular chamber (191) from the second annular chamber (192).

9. The system for detecting the tightness of a rotary joint of a tobacco dryer according to claim 1, wherein said input pipe (12) comprises a first input pipe (121) and a second input pipe (122), said output pipe (13) comprises a first output pipe (131) and a second output pipe (132), and said heat exchange pipe (22) comprises a first heat exchange pipe (221) and a second heat exchange pipe (222); the input channel (15) comprises a first input channel (151) and a second input channel (152), the output channel (16) comprises a first output channel and a second output channel;

the first end of the first heat exchange tube (221) is connected with the first input channel (151), the first input channel (151) is connected with the first input tube (121), the second end of the first heat exchange tube (221) is connected with the first output channel, and the first output channel is connected with the first output tube (131);

the first end of the second heat exchange tube (222) is connected with the second input channel (152), the second input channel (152) is connected with the second input tube (122), the second end of the second heat exchange tube (222) is connected with the second output channel, and the second output channel is connected with the second output tube (132).

10. The system for detecting the tightness of a rotary joint of a cut-tobacco drier according to claim 9, wherein said cylinder (11) is provided with two first annular chambers (191) and two second annular chambers (192);

one of said first annular chambers (191) communicating said first inlet duct (121) and said first inlet channel (151), the other of said first annular chambers (191) communicating said second inlet duct (122) and said second inlet channel (152);

one of said second annular chambers (192) communicating with the first outlet pipe (131) and said first outlet passage, and the other of said second annular chambers (192) communicating with the second outlet pipe (132) and said second outlet passage;

the seals (18) are respectively disposed between two first annular cavities (191), between two second annular cavities (192), and between the first annular cavity (191) and the second annular cavity (192), and are configured to isolate the annular cavities.

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