WO2020098285A1

WO2020098285A1 - Structure employing dry ice for online cleaning of air duct

Info

Publication number: WO2020098285A1
Application number: PCT/CN2019/093300
Authority: WO
Inventors: 吴俊斌; 张辉城; 谢定宇
Original assignee: 厦门佰欧环境智能科技有限公司
Priority date: 2018-11-12
Filing date: 2019-06-27
Publication date: 2020-05-22
Also published as: CN109365439B; CN109365439A

Abstract

A structure employing dry ice for online cleaning of an air duct, comprising a crawling mechanism, a nozzle mechanism, an electrical control box (80), and a dry ice storage tank (90). The dry ice storage tank (90) is connected to the nozzle mechanism via a dry ice delivery pipe (91). The electrical control box (80) is used to control forward and backward movement of the crawling mechanism, and starting and stopping of the nozzle mechanism. The crawling mechanism is used to carry the nozzle mechanism and to crawl in the air duct, such that the air duct is cleaned by the nozzle mechanism. The structure employing dry ice for online cleaning of an air duct crawls in the air duct by means of the crawling mechanism, and while crawling, sprays dry ice onto the inner wall of the air duct by means of the nozzle mechanism. The dry ice makes strong contact with smoke and tar on the inner wall of the air duct under normal pressure; and accordingly, sublimates so as to cause rapid freezing and expansion, such that the smoke and tar instantaneously freezes until the smoke and tar becomes brittle, shatters after busting, and is then blown away by compressed air. The invention facilitates rapid stripping of the smoke and tar from the inner wall of the air duct, and avoids inconvenience and waste resulting from regularly replacing the air ducts in a tobacco plant.

Description

Structure for online cleaning of air pipe by using dry ice

Technical field

The invention relates to a pipeline cleaning structure, in particular to a structure that uses dry ice to clean an air pipe online.

Background technique

In the process of flue-cured tobacco leaves, the flue-cured tobacco industry needs to discharge harmful gases out of the workshop. During this process, a large amount of smoke tar and its carbide will adhere to the exhaust duct. It will cause an increase in wind resistance due to the adhesion of smoke tar and dust mixture, which will lead to an increase in energy consumption until the air duct is blocked. This is a stubborn problem that the flue-cured tobacco industry urgently needs to solve.

The traditional treatment method is to periodically stop working to remove the air pipe and replace it with a new one or to remove and use physical methods to polish and clean. Every time the work is stopped, removed and replaced, the pipeline causes a huge waste of manpower and material resources, and manual physical cleaning causes damage to the air pipe. Therefore, a method that does not affect production and does not require regular replacement of new air pipes will produce huge economic benefits.

technical problem

In view of this, the object of the present invention is to provide a structure for online cleaning of air ducts using dry ice, which can facilitate the clearing of the smoke tar in the air ducts and avoid the trouble and waste of regularly replacing the air ducts.

Technical solution

To achieve the above objectives, the technical solutions adopted by the present invention are:

A structure for using dry ice to clean an air duct on-line. The structure includes a crawling mechanism, a nozzle mechanism, an electrical appliance control box, and a dry ice storage tank. The dry ice storage tank is connected to the nozzle mechanism through a dry ice delivery pipe. The electrical appliance control box and the crawling mechanism , The nozzle mechanism is electrically connected; the crawling mechanism includes a mounting frame, a supporting component, a driving component, and a tension adjusting component, the nozzle mechanism is disposed at one end of the mounting frame, the supporting component is disposed on the mounting frame, and the driving component It is set on the support assembly, the tension adjustment assembly is set on the mounting bracket, and connected to the support assembly;

The tension adjustment assembly includes a transmission structure and at least one movable ring, the transmission structure is connected to the movable ring, and the movable ring is sleeved outside the mounting bracket;

The support assembly includes at least one set of support arms, and each set of support arms includes two tilted support arms, namely a first support arm and a second support arm, the first support arm, the second support arm, and the center of the mounting bracket The axes are on the same plane, and the inclination direction of the first support arm is opposite to the inclination direction of the second support arm; one end of the first support arm is fixed on the movable ring or cylindrical housing, and the other end is connected to the drive assembly. The body between the two ends of a support arm is fixed to the cylindrical housing or the movable ring through a telescopic member; one end of the second support arm is fixed to the movable ring or the cylindrical housing, and the other end is connected to a drive assembly, the second support arm The body between the two ends is fixed on the cylindrical shell or movable ring through the telescopic member;

The nozzle mechanism includes a nozzle motor, a first gear, a second gear, a rotary joint, an elbow, and a nozzle. The nozzle motor is provided in the mounting frame, and the first gear is provided outside the mounting frame and connected to the nozzle motor through the transmission shaft; The dry ice conveying pipe runs through the installation frame, one end of which extends out of the installation frame to connect with the dry ice storage tank, and the other end extends out of the installation frame and connects to the rotary joint, and the rotary joint is connected to the elbow and the elbow is connected to the nozzle; The second gear is sleeved outside the elbow and meshes with the first gear.

The transmission mechanism includes a screw motor, a screw, and a screw nut. The screw motor is fixed in a mounting frame and is connected to the screw; the screw nut is cooperatively connected to the outer periphery of the screw, and the screw nut is connected and movable ring.

The transmission mechanism includes a cylinder and a push rod. The cylinder is fixed in the mounting frame and connected to one end of the push rod, while the other end of the push rod is connected to the movable ring.

The transmission mechanism includes a turbine motor and a turbine worm. The turbine motor is fixed in the mounting frame and connected to one end of the turbine worm, while the other end of the turbine worm is connected to the movable ring.

The tension adjusting assembly further includes an optical axis guide rail, the optical axis guide rail is fixed in the mounting frame and is threaded in the movable ring.

The telescopic member is a hydraulic shock absorber; the mounting frame includes a cylindrical housing and fixed end covers connected to both ends of the cylindrical housing.

The driving assembly includes a driving wheel and a driving motor, the driving motor is fixed on the support arm, and the driving wheel is connected to the driving motor through a speed reducer.

The rotary joint of the nozzle mechanism includes an outer tube and an inner tube connected to the outer tube and rotatable relative to the outer tube, the outer tube is connected to a dry ice conveying tube, and the inner tube is connected to a curved tube.

A first flange is fixed at one end of the dry ice conveying pipe connected to the rotary joint, and a fixing plate extends on the side wall of the first flange, and the fixed plate is fixed on the mounting frame; the outer pipe of the rotary joint is close to the bend A second flange is fixed at the pipe, and a fixing plate extends on the side wall of the second flange, and the fixing plate is fixed on the mounting frame through a connecting plate.

A fixing bracket is installed on the nozzle motor, the transmission shaft and the first gear, and the fixing bracket is fixed on the mounting bracket.

Beneficial effect

After adopting the above solution, the present invention utilizes the structure of dry ice online cleaning duct to support the crawling mechanism on the inner wall of the pipeline through the support assembly, drive the crawling mechanism to crawl in the pipeline through the driving assembly, and adjust the contraction or support of the support assembly through the tension adjustment assembly Open, so that crawling can be applied to air ducts with different pipe diameters, and at the same time ensure that the drive assembly connected to one end of the support assembly can be in a compressed state with the pipe wall, so that the crawling mechanism has sufficient friction to carry the nozzle mechanism for horizontal crawling and vertical crawling Creeping, slanting crawling or curved pipe crawling. At the same time, in the present invention, by forming the support arms of the support assembly into a double umbrella-shaped structure with opposite directions, when the crawling mechanism crawls in a horizontal pipe, a vertical pipe, an inclined pipe or even a curved pipe, at least one support arm and pipe in each group of support arms The wall is in a compressed state, which ensures the stable crawling of the crawling mechanism in different types of pipelines such as horizontal pipes, vertical pipes, inclined pipes and curved pipes.

On the basis of the stable crawling mechanism of the crawling mechanism, the present invention utilizes the structure of the dry ice online cleaning duct to transport the dry ice in the dry ice storage tank to the nozzle mechanism through the dry ice delivery pipe. The nozzle motor of the nozzle mechanism drives the first gear to rotate, and the first gear drives The second gear rotates, and the second gear drives the elbow and the rotary joint to rotate, and finally drives the nozzle to rotate 360 °. In this way, the dry ice in the dry ice conveying pipe enters the rotary joint and the elbow, and is finally ejected by the nozzle at a 360 ° rotation. The ejected dry ice violently contacts the smoke tar on the inner wall of the air pipe under normal pressure and sublimates to produce rapid freezing and rapid expansion. , Instantly freezes the smoke tar until it is brittle, and then splits under the detonation and is blown away by compressed air, so as to achieve the purpose of removing the smoke tar on the inner wall of the air duct.

BRIEF DESCRIPTION

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

2 is a schematic structural diagram of a crawling mechanism according to an embodiment of the invention;

3 is a schematic structural diagram of a nozzle mechanism according to an embodiment of the invention.

Embodiments of the invention

As shown in FIGS. 1 to 3, the present invention discloses a structure that uses dry ice to clean the air duct on-line, which includes a crawling mechanism, a nozzle mechanism, an electrical control box 80, and a dry ice storage tank 90, wherein the dry ice storage tank 90 passes through the dry ice The conveying pipe 91 is connected to the nozzle mechanism; the electrical control box 80 is electrically connected to the crawling mechanism and the nozzle mechanism, used to control the forward and backward of the crawling mechanism, and to control the start and stop of the nozzle mechanism; the crawling mechanism is used to carry the nozzle mechanism and crawl in the air pipe, In order to clean the air duct of the nozzle mechanism.

The invention controls the crawling mechanism to crawl in the wind pipe through the electric appliance control box 80. While crawling, the nozzle mechanism is activated, and the dry ice in the dry ice storage tank 90 is transported to the nozzle mechanism through the dry ice delivery pipe 91, and the nozzle mechanism sprays the dry ice to the inner wall of the wind pipe , Using dry ice to contact with the smoke tar on the inner wall of the air duct under normal pressure and then sublimate to produce rapid freezing and rapid expansion, which forms a detonation effect, instantaneously freezes the smoke tar until it is brittle, and is compressed under the detonation and then compressed When the air is blown away, the tobacco tar can be quickly peeled off from the inner wall of the air pipe, and a clean and bright inner wall of the air pipe can be obtained in a short time, avoiding the trouble and waste of regularly replacing the air pipe in the flue-cured tobacco factory.

The above crawling mechanism includes a mounting frame, a supporting component, a driving component and a tension adjusting component, wherein the nozzle mechanism is provided at one end of the mounting frame for cleaning the inner wall of the pipeline; the supporting component is provided on the mounting frame to support the crawling mechanism at In the pipeline; the driving component is set on the support component to drive the crawling mechanism to crawl in the pipeline; the tension adjustment component is set on the mounting bracket and connected to the support component, the tension adjustment component is used to maintain the support component and the inner wall of the pipeline Tension.

The mounting bracket includes a cylindrical housing 11 and fixed end 12 covers connected to both ends of the cylindrical housing 11. A receiving space is formed in the cylindrical housing 11.

The above tension adjustment assembly includes a screw motor 21, a screw 23, a screw nut 24, an optical axis guide 26 and a movable ring 25, wherein the screw motor 21 is fixed in the cylindrical housing 11 and its motor shaft passes through a coupling 22 is connected to the screw rod 23; the screw nut 24 is cooperatively connected to the outer periphery of the screw rod 23, and the screw nut 24 is connected to the movable ring 25, and the movable ring 25 is sleeved outside the cylindrical housing 11;

The optical axis guide 26 is axially fixed in the cylindrical housing 11 and penetrates the movable ring 25. When the screw motor 21 drives the screw 23 to rotate, the screw nut 24 can drive the movable ring 25 to move along the optical axis guide 26. In order to ensure the stability of the movement of the movable ring 25, the number of optical axis guides 26 may be set at more than two.

The screw motor 21, the screw 23 and the screw nut 24 cooperate to form a transmission structure for driving the movable ring 25. The transmission structure may also be formed by using a cylinder in combination with a push rod, wherein the cylinder is fixed in the cylindrical housing 11 and is connected by The shaft is connected to the push rod, and the push rod is connected to the movable ring 25. The transmission mechanism can also be realized by using a turbine motor and a turbine worm. The turbine motor is fixed in the cylindrical housing 11 and connected to one end of the turbine worm, and the other end of the turbine worm is connected to the movable ring 25.

The above support assembly includes at least one set of support arms, and each set of support arms includes two tilted support arms, namely a first support arm 311 and a second support arm 312, a first support arm 311, a second support arm 312, and a cylindrical housing The center axis of 11 is on the same plane, and the tilt direction of the first support arm 311 is opposite to the tilt direction of the second support arm 312. One end of the first support arm 311 is fixed to the movable ring 25 or the cylindrical housing 11, and the other end is connected to a driving assembly. The body between the two ends of the first support arm 311 is fixed to the cylindrical housing 11 or the movable ring 25 through a telescopic member The second support arm 312 is fixed at one end to the movable ring 25 or the cylindrical housing 11, and the other end is connected to the drive assembly. The body between the two ends of the second support arm 312 is fixed to the cylindrical housing 11 or the movable ring through a telescopic member 25 on.

The above drive assembly includes a drive wheel 42 and a drive motor 41. The drive motor 41 is fixed to the support arms 311 and 312, and the drive wheel 42 is connected to the drive motor 41 through a reduction gear. Among them, the driving wheel 42 may adopt a wheel structure or a track structure. The driving motor 41 drives the driving wheel 42 to rotate through deceleration, the driving motor 41 rotates forward, the driving wheel 42 moves forward, the driving motor 41 rotates backward, and the driving wheel 42 moves backward. The crawling speed of the driving wheel 42 can be controlled by adjusting the rotational speed of the driving motor 41.

The above nozzle mechanism includes a nozzle motor 51, a transmission shaft 52, a first gear 53, a second gear 54, a rotary joint 61, an elbow 62, and a nozzle 63, wherein the nozzle motor 51 is disposed in the accommodating space of the cylindrical housing 11, The first gear 53 is connected to the nozzle motor 51 through the transmission shaft 52; the dry ice conveying pipe 91 penetrates into the cylindrical housing 11, one end of the dry ice conveying pipe 91 is provided with a fixed end cover 12 and connected to the dry ice storage tank 90, and the other end is passed through The other fixed end cover 12 is provided and connected to the rotary joint 61; one end of the rotary joint 61 is connected to the dry ice conveying pipe 91, the other end is connected to the elbow pipe 62, and the elbow pipe 62 is connected to the nozzle 63; the second gear 54 is sleeved outside the elbow pipe 62 And mesh with the first gear 53. The nozzle motor 51 drives the first gear 53 to rotate through the transmission shaft 52, the first gear 53 drives the second gear 54 to rotate, and the second gear 54 drives the elbow 62 and the rotary joint 61 to rotate, and finally drives the nozzle 63 to rotate at 360 °.

In the disclosed embodiment of the present invention, the support assembly is composed of three sets of support arms, and the telescopic member in the support assembly uses a hydraulic shock absorber 32, which in addition to the telescopic effect, also has the effect of shock absorption for stability The crawling mechanism crawls in the pipeline, and the three sets of support arms are fixed to the cylindrical housing 11 through a fixing ring 33. The telescopic tension adjustment component is composed of a screw motor 21, a screw 23, a screw nut 24, three optical axis guides 26, and a movable ring 25, and the three optical axis guides 26 are all penetrated in the movable ring 25.

Specifically, one end of the first support arm 311 of the three sets of support arms is fixed to the movable ring, and the other end is connected to the drive assembly. The bodies at both ends of the first support arm 311 are fixed to the fixed ring 33 through the hydraulic shock absorber 32; One end of the two support arms 312 is fixed to the fixed ring 33, and the other end is connected to the driving assembly. The body between the two ends of the second support arm 312 is fixed to the movable ring 25 through the hydraulic shock absorber 32. The first support arm 311 of the three sets of support arms forms an umbrella-shaped structure, and the second support arm 312 forms another umbrella-shaped structure, and the directions of the two umbrella-shaped structures are opposite.

The invention utilizes the structure of dry ice online cleaning duct to support the crawling mechanism on the inner wall of the pipeline through the support assembly, drive the crawling mechanism to crawl in the pipeline through the driving assembly, and adjust the contraction or expansion of the support assembly by the tension adjustment assembly, so that the crawling can Suitable for air ducts with different pipe diameters, and at the same time ensure that the drive assembly connected to one end of the support assembly can be pressed against the pipe wall, so that the crawling mechanism has sufficient friction to carry the nozzle mechanism for horizontal crawling, vertical crawling, inclined crawling or Bent pipe crawling. At the same time, in the present invention, by forming the support arms of the support assembly into a double umbrella type structure with opposite directions, when the crawling mechanism crawls in a horizontal pipe, a vertical pipe, an inclined pipe or even a curved pipe, at least one support arm 311 in each group of support arms 312 is in a compact state with the pipe wall, which ensures the stable crawling of the crawling mechanism in different types of air ducts such as horizontal pipes, vertical pipes, inclined pipes and curved pipes.

On the basis of the crawling mechanism crawling stably in the air duct, the present invention utilizes the structure of online cleaning of the air duct with dry ice to transport the dry ice in the dry ice storage tank 90 to the nozzle mechanism through the dry ice delivery pipe 91, and the nozzle motor 51 of the nozzle mechanism drives the first gear 52 rotates, the first gear 52 drives the second gear 52 to rotate, and the second gear 52 drives the elbow 62 and the rotary joint 61 to rotate, and finally drives the nozzle 63 to rotate at 360 °. In this way, the dry ice in the dry ice conveying pipe 91 enters the rotary joint 61 and the elbow 62, and is finally ejected by the nozzle 63 in a 360 ° rotation. The ejected dry ice violently contacts the smoke tar on the inner wall of the air duct under normal pressure and is sublimated to produce Rapid freezing and rapid expansion, instantaneously freezing the smoke tar until it becomes brittle, and it is torn apart under detonation and then blown away by compressed air, so as to achieve the purpose of removing the smoke tar on the inner wall of the air duct.

In addition to the above embodiments, in actual use, the movable ring 25 of the tension adjustment assembly of the crawling mechanism may be set to two, and when the movable ring 25 is set to two, a screw motor 21 may be used to control simultaneously For the movement of the two movable rings 25, two screw motors 25 can also be used to control the movement of the two movable rings 25, respectively. When two screw motors 21 are used to control two movable rings 25, one screw motor 21 controls one movable ring 25, the other screw motor 21 controls the other movable ring 25, and one of the two movable rings 25 It is used to stretch or contract the first support arm 311, and another movable ring 25 is used to stretch or contract the second support arm 312. The crawling mechanism of this structure can still maintain stability in the curved pipe or the pipe whose diameter is changed. crawl.

The rotary joint 61 of the nozzle mechanism includes an outer tube 611 and an inner tube 612 disposed in the outer tube 611, the inner tube 612 can rotate relative to the outer tube 611, wherein the outer tube 611 is connected to the dry ice delivery tube 91, and the inner tube 612 is connected to the elbow 62 connections.

In order to ensure the cleaning effect in the air duct, the dry ice from the dry ice storage tank 90 to the rotary joint 61 of the nozzle mechanism is generally transported under high pressure, so that the stability of the nozzle mechanism will be affected. In order to improve the stability of the nozzle mechanism and further ensure the cleaning effect of the air pipe, a first flange 71 is fixed to the end of the dry ice conveying pipe 91 connected to the rotary joint 61, and a fixing plate 711 extends on the side wall of the first flange 71 The fixing plate 711 is fixed on the fixed end cover 12 of the mounting frame. A second flange 72 is fixed to the outer tube 611 of the rotary joint 61 near the elbow 62. A fixing plate 721 extends on the side wall of the second flange 72, and the fixing plate 721 is fixed to the mounting frame through a connecting plate 73端盖 12 上。 On the end cover 12. Through the first flange 71, the second flange 72 and the connecting plate 73, the dry ice conveying pipe 91 and the rotary joint 61 can be stably fixed on the fixed end cover 12 of the crawling mechanism to avoid being affected by the high pressure in the dry ice conveying pipe 91 .

Because the second gear 54 is sleeved on the elbow 62, and the first gear 53 is meshed with the second gear 54, the high pressure in the dry ice delivery pipe 91 may also affect the nozzle motor 51, the transmission shaft 52, and the first The connection stability of the gear 53.

To this end, the present invention is equipped with a fixing frame 74 on the nozzle motor 51, the transmission shaft 52 and the first gear 53, and the fixing frame 74 is fixed on the fixed end cover 12 of the mounting frame.

The above is only the embodiments of the present invention, and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and modifications to the above embodiments based on the technical essence of the present invention still belong to the present invention. Within the scope of technical solutions.

Claims

A structure for using dry ice to clean the air duct on line, characterized in that the structure includes a crawling mechanism, a nozzle mechanism, an electrical appliance control box and a dry ice storage tank, the dry ice storage tank is connected to the nozzle mechanism through a dry ice delivery pipe, and the electrical appliance controls The box is electrically connected with a crawling mechanism and a nozzle mechanism; the crawling mechanism includes a mounting frame, a supporting component, a driving component and a tension adjusting component, the nozzle mechanism is provided at one end of the mounting frame, and the supporting component is provided on the mounting frame, The drive assembly is provided on the support assembly, and the tension adjustment assembly is provided on the mounting bracket and connected to the support assembly;

The tension adjustment assembly includes a transmission structure and at least one movable ring, the transmission structure is connected to the movable ring, and the movable ring is sleeved outside the mounting bracket;

The support assembly includes at least one set of support arms, and each set of support arms includes two tilted support arms, namely a first support arm and a second support arm, the first support arm, the second support arm, and the center of the mounting bracket The axes are on the same plane, and the inclination direction of the first support arm is opposite to the inclination direction of the second support arm; one end of the first support arm is fixed on the movable ring or cylindrical housing, and the other end is connected to the drive assembly. The body between the two ends of a support arm is fixed to the cylindrical housing or the movable ring through a telescopic member; one end of the second support arm is fixed to the movable ring or the cylindrical housing, and the other end is connected to a drive assembly, the second support arm The body between the two ends is fixed on the cylindrical shell or movable ring through the telescopic member;

The nozzle mechanism includes a nozzle motor, a first gear, a second gear, a rotary joint, an elbow, and a nozzle. The nozzle motor is provided in the mounting frame, and the first gear is provided outside the mounting frame and connected to the nozzle motor through the transmission shaft; The dry ice conveying pipe runs through the installation frame, one end of which extends out of the installation frame to connect with the dry ice storage tank, and the other end extends out of the installation frame and connects to the rotary joint, and the rotary joint is connected to the elbow and the elbow is connected to the nozzle; The second gear is sleeved outside the elbow and meshes with the first gear.
A structure for online cleaning of air ducts using dry ice according to claim 1, characterized in that the transmission mechanism includes a screw motor, a screw and a screw nut, and the screw motor is fixed in a mounting frame, which The screw is connected; the screw nut is cooperatively connected on the outer periphery of the screw, and the screw nut is connected with the movable ring.
The structure of using dry ice to clean the air pipe according to claim 1, characterized in that the transmission mechanism includes a cylinder and a push rod, the cylinder is fixed in the mounting frame, and is connected to one end of the push rod, and the The other end of the push rod is connected to the movable ring.
The structure for online cleaning of air ducts using dry ice according to claim 1, characterized in that the transmission mechanism includes a turbine motor and a turbine worm, the turbine motor is fixed in the mounting frame, and is connected to one end of the turbine worm, The other end of the turbine worm is connected to the movable ring.
The structure for online cleaning of air ducts using dry ice according to claim 1, characterized in that: the tension adjustment assembly further comprises an optical axis guide rail, the optical axis guide rail is fixed in the mounting frame, and is worn on the mobile In the ring.
A structure for online cleaning of air ducts using dry ice according to claim 1, characterized in that: the telescopic member is a hydraulic shock absorber; the mounting bracket includes a cylindrical shell and fixed ends connected to both ends of the cylindrical shell End cap.
The structure of using dry ice to clean the air duct according to claim 1, characterized in that the drive assembly includes a drive wheel and a drive motor, the drive motor is fixed on the support arm, and the drive wheel is decelerated by The machine is connected to the drive motor.
The structure for online cleaning of air ducts using dry ice according to claim 1, characterized in that the rotary joint of the nozzle mechanism includes an outer tube and an inner tube connected to the outer tube and rotatable relative to the outer tube, the outer The tube is connected to the dry ice delivery tube, and the inner tube is connected to the bent tube.
A structure for using dry ice to clean an air pipe according to claim 8, wherein a first flange is fixed at one end of the dry ice conveying pipe connected to the rotary joint, and a side wall of the first flange extends A fixing plate, the fixing plate is fixed on the mounting frame; the outer tube of the rotary joint is fixed with a second flange near the elbow, and a fixing plate extends on the side wall of the second flange, and the fixing plate passes A connecting plate is fixed on the mounting frame.
The structure of using dry ice to clean the air pipe according to claim 9, characterized in that a fixing bracket is installed on the nozzle motor, the transmission shaft and the first gear, and the fixing bracket is fixed on the mounting bracket.