Purging device and purging system in channel

Abstract

The invention provides a purging device in a channel and a purging system, and relates to the technical field of aero-engine cleaning. The in-channel purging device comprises a purging pipe and a protective cover. The purging pipe is provided with a near end and a far end which are opposite to each other, a purging hole is formed in the far end of the purging pipe, and the purging hole is used for spraying a purging medium in the purging pipe outwards, so that redundant substances in the channel are purged and cleaned. The protective cover comprises protective supports and protective parts arranged between the adjacent protective supports, the protective cover is used for being switched between an open state and a recovery state under the action of the purging medium, when the protective cover is in the recovery state, the protective supports are close to the outer wall of the purging pipe, and when the protective cover is in the open state, the protective parts are close to the outer wall of the purging pipe. The other end of the protection support is used for facing the inner wall of the channel so that the blowing medium can be prevented from moving towards the far end of the blowing pipe through the protection part, and then the problem that redundant materials carried in the blowing medium continue to go deep into the channel is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft engine cleaning, and in particular to an in-channel purge device and a purge system. Background Art

[0002] Aircraft engines are extremely complex systems engineering with tens of thousands of parts. With the continuous improvement of engine performance requirements and the continuous enhancement of functions, their structures are becoming more and more complex. The production, processing, assembly and other processes involved are becoming increasingly cumbersome, and waste may be generated and carried in each link. For aircraft engines, among the many factors that affect their quality, waste is often a major hidden danger that causes quality accidents, which has a great impact on the performance, safety, reliability and life of the engine, and even causes engine accidents in severe cases. For example, waste in the flow channel will cause damage to the engine blades, affect the aerodynamic performance, and even penetrate the casing, causing air parking; waste in the pipeline may cause pipeline blockage, interruption of gas and liquid supply, and in severe cases, excessive system pressure will cause pipeline or accessory explosion; waste in the lubricating oil system will not only block the pipeline, making it unable to supply oil normally, but also cause serious wear of engine accessories, and even cause major failures such as shaft seizure and engine burnout. Therefore, the control and cleaning of waste is extremely important.

[0003] The methods commonly used to clean up the excess materials include: wiping - wiping the surface of the product and accessible parts with a cloth; blowing - using compressed air to blow away the excess materials inside the pipe; sucking - using a magnet to suck away the iron filings attached to the surface; washing - using special solvents and effective methods such as ultrasonic cleaning; vibration - placing the open part of the product at the bottom, hitting the product appropriately with a rubber hammer, and using vibration to discharge the excess materials, etc. However, for the cleaning of the excess materials attached to the inner wall of the pipe / cavity where the excess materials need to be prevented from continuing to penetrate, especially the small particles of excess materials attached to the inner wall of the pipe / cavity through viscous oil, the above methods cannot solve the problem. Direct blowing will cause the excess materials to continue to penetrate into the cavity, and the vibration method has little effect on the excess materials attached to the pipe wall, but this situation is extremely common and the cost of decomposition cleaning is high, so it is urgent to find a suitable cleaning method. Summary of the invention

[0004] The object of the present invention is to provide a channel purging device which can improve the problem of excess matter continuing to penetrate into a cavity or a tube (collectively referred to as a channel) during purging.

[0005] Another object of the present invention is to provide a purging system that can improve the problem of excess matter continuing to penetrate into a cavity or a tube during purging.

[0006] The embodiments of the present invention can be implemented in the following ways:

[0007] A purge device in a channel, comprising a purge pipe, wherein the purge pipe has a proximal end and a distal end opposite to each other, and a purge hole is provided at the distal end of the purge pipe, wherein the purge hole is used to spray out a purge medium in the purge pipe; and

[0008] A protective cover, comprising a plurality of protective brackets and a protective portion arranged between two adjacent protective brackets; one end of the protective bracket is hinged to the outer wall of the purge tube, and the hinge position of the protective bracket and the purge tube is farther away from the proximal end than the purge hole; the protective cover is used to switch between an open state and a recovery state under the action of the purge medium; when the protective cover is in the recovery state, the protective bracket is close to the outer wall of the purge tube, and when the protective cover is in the open state, the other end of the protective bracket is used to face the inner wall of the channel to block the purge medium from moving toward the distal end of the purge tube through the protective portion.

[0009] Optionally, the in-channel purging device also includes a driving member, which includes a piston portion and an elastic support arm connected to each other; the piston portion is arranged in the purging tube, and is used to slide relative to the purging tube under the pressure of the purging medium; the purging tube has a through hole for the elastic support arm to move; the elastic support arm is used to extend from the through hole and support the protective bracket to rotate from the retracted state to the open state, or to retract the purging tube from the through hole to switch the protective bracket from the open state to the retracted state.

[0010] Optionally, the elastic support arm includes a first arm portion and a second arm portion, one end of the first arm portion is fixedly connected to the piston portion, and the first arm portion extends along the axis of the purge tube; the second arm portion is connected to the other end of the first arm portion, and the second arm portion is inclined relative to the first arm portion; the through hole is inclined relative to the radial direction of the purge tube.

[0011] Optionally, one end of the second arm away from the first arm has a snap-in groove, and the snap-in groove is used to snap-in and limit the protective bracket.

[0012] Optionally, the piston portion is used to cover the purge hole when the protective cover is in the recovery state to close the purge hole; the piston portion is also used to be staggered with the purge hole when the protective cover is in the open state to open the purge hole.

[0013] Optionally, the distal end of the purging tube has an end wall, and the in-channel purging device further comprises an elastic member arranged between the piston portion and the end wall, and the elastic member is used to apply an elastic force pointing to the proximal end to the piston portion.

[0014] Optionally, a boss is provided on one of the end wall and the piston part, and one end of the elastic member is sleeved on the boss; a groove is provided on the other of the end wall and the piston part, and the other end of the elastic member is accommodated in the groove.

[0015] Optionally, a plurality of the purge holes are distributed along the circumference of the purge tube, and the axial direction of the purge hole is inclined relative to the radial direction of the purge tube toward the proximal end of the purge tube, and the projection of the axial direction of the purge hole on the cross-section of the purge tube is inclined relative to the radial direction of the purge tube, so that the ejected purge medium flow is spiral.

[0016] Optionally, the protective part is made of elastic material.

[0017] A purging system comprises a power device and the above-mentioned in-channel purging device, wherein the power device is connected to a purging pipe of the in-channel purging device so as to form a purging medium flow in the purging pipe through the power device.

[0018] The beneficial effects of the channel purge device and the purge system provided by the embodiments of the present invention include:

[0019] The embodiment of the present invention provides a channel purging device including a purging tube and a protective cover. The purging tube has a relative proximal end and a distal end, and a purging hole is provided at the distal end of the purging tube, and the purging hole is used to spray the purging medium in the purging tube outward, so as to purge and clean the excess materials in the channel (i.e., in the tube or in the cavity). The protective cover includes a protective bracket and a protective portion arranged between adjacent protective brackets. One end of the protective bracket is hinged outside the purging tube, and the hinge position of the protective bracket and the purging tube is farther from the proximal end than the purging tube. The protective cover is used to switch between an open state and a retracted state under the action of the purging medium. When the protective cover is in the retracted state, the protective bracket is close to the outer wall of the purging tube. When the protective cover is in the open state, the other end of the protective bracket is used to face the inner wall of the channel to block the purging medium from moving toward the distal end of the purging tube through the protective portion, thereby avoiding the problem of the excess materials carried in the purging medium continuing to penetrate into the channel.

[0020] An embodiment of the present invention further provides a purging system, which includes the above-mentioned in-channel purging device, and thus can also block the purging medium from moving toward the far end of the purging tube, thereby avoiding the problem of excess matter carried in the purging medium continuing to penetrate deeper into the channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0022] Figure 1 It shows a schematic diagram of the overall structure of the channel purge device provided according to one aspect of the present invention;

[0023] Figure 2 A schematic diagram of the structure of a protective cover in a channel purge device provided according to one aspect of the present invention when the protective cover is in an open state;

[0024] Figure 3 It shows a cross-sectional structural schematic diagram of the channel purge device provided according to one aspect of the present invention when it is working;

[0025] Figure 4 It shows a schematic cross-sectional structure diagram of a protective cover in a channel purge transposition when the protective cover is in a recovery state according to one aspect of the present invention;

[0026] Figure 5 A schematic structural diagram of a driving member of a channel purge device provided according to one aspect of the present invention is shown;

[0027] Figure 6 Shows Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle.

[0028] Reference numerals:

[0029] 100-in-channel purge device; 110-purge pipe; 111-proximal end; 112-distal end; 113-purge hole; 114-end wall; 115-boss; 116-side wall; 117-through hole; 120-protective cover; 121-protective bracket; 122-protective part; 130-driving member; 131-piston part; 132-groove; 133-elastic support arm; 134-first arm part; 135-second arm part; 136-clamping groove; 140-elastic member; 200-channel; 210-excess material. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0031] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", "vertical" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] At the same time, it should be noted that the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Figure 1 is a schematic diagram of the overall structure of the channel purge device 100 provided in this embodiment, and Figure 1 The protective cover 120 is in a reclaimed state. Figure 2 This is a schematic diagram of the structure of the protective cover 120 in the channel purge device 100 provided in this embodiment when it is in an open state. Figure 3 This is a cross-sectional structural diagram of the channel purge device 100 provided in this embodiment when it is working. Figure 1-Figure 3 , this embodiment provides a channel purge device 100, and correspondingly, also provides a purge system (not shown).

[0035] The purge system includes an in-channel purge device 100, and the purge system also includes a power device (not shown), which is connected to the purge pipe 110 of the in-channel purge device 100, so that a purge medium flow is formed in the purge pipe 110 through the power device. Optionally, in this embodiment, the purge medium flow is a purge air flow, and accordingly, the power device can be optionally set as an air pump. It can be understood that the purge medium can also use other substances, such as a purge liquid.

[0036] Please continue to refer to Figure 1-Figure 3The in-channel purging device 100 provided in this embodiment includes a purging tube 110 and a protective cover 120. The purging tube 110 has a proximal end 111 and a distal end 112 relative to each other. The distal end 112 of the purging tube 110 is provided with a purging hole 113. The purging hole 113 is used to spray the purging medium in the purging tube 110 outward, thereby purging and cleaning the excess material 210 in the channel 200 (i.e., including the inside of the tube or the inside of the cavity). The protective cover 120 includes a protective bracket 121 and a protective portion 122 arranged between adjacent protective brackets 121. One end of the protective bracket 121 is hinged to the outside of the purging tube 110, and the hinge position of the protective bracket 121 and the purging tube 110 is farther away from the proximal end 111 than the purging tube 110. The protective cover 120 is used to switch between an open state and a recovery state under the action of a purging medium. When the protective cover 120 is in the recovery state, the protective bracket 121 is close to the outer wall of the purging tube 110. When the protective cover 120 is in the open state, the other end of the protective bracket 121 is used to face the inner wall of the channel 200 to block the purging medium from moving toward the distal end 112 of the purging tube 110 through the protective part 122, thereby avoiding the problem of excess matter 210 carried in the purging medium continuing to penetrate into the channel 200.

[0037] It should be noted that, in the description of this embodiment, the "distal end 112" and the "proximal end 111" are two relative parts, the "proximal end 111" is the end of the purge pipe 110 close to the power device along its own axial direction (that is, the length direction of the purge pipe 110), or the end of the purge pipe 110 close to the outlet of the channel 200, and correspondingly, the "distal end 112" is the end of the purge pipe 110 away from the power device along its own axial direction (that is, the length direction of the purge pipe 110), or the end of the purge pipe 110 close to the inside of the channel 200. At the same time, in the description of this embodiment, the "proximal end 111" and the "distal end 112" are parts within a certain length range including the end of the purge pipe 110, and the certain length range may be 5% of the length of the purge pipe 110.

[0038] Figure 4 FIG. 1 shows a schematic cross-sectional structure diagram of the protective cover 120 in the channel 200 provided in this embodiment when the protective cover 120 is in a recovery state during the purge transfer. Figure 1-Figure 4 In this embodiment, a plurality of protective brackets 121 are evenly distributed along the circumference of the protective cover 120, and the protective portion 122 is disposed between two adjacent protective brackets 121. One end of the protective bracket 121 is hinged to the outer wall of the purge tube 110, and the other end of the protective bracket 121 is a free end. By rotating the protective bracket 121 around the hinged position with the purge tube 110, the protective cover 120 can be opened in the open position (such as Figure 2 and Figure 3 as shown) and the recovery location (as Figure 1 and Figure 4The protective cover 120 is switched between the proximal end 111 and the proximal end 112 of the purge tube 110, specifically, when the plurality of protective brackets 121 rotate to be close to the outer wall of the purge tube 110, that is, when the protective brackets 121 are roughly parallel to the axis of the purge tube 110, the protective cover 120 is in a recovered state. When the plurality of protective brackets 121 rotate to the free ends toward the inner wall of the channel 200, that is, when the protective brackets 121 extend roughly along the radial direction of the purge tube 110, the protective cover 120 is in an open state, and at this time, the protective cover 120 is in an open umbrella shape as a whole. Since the hinged position of the protective bracket 121 and the purge tube 110 is farther from the proximal end 111 than the purge hole 113, the protective cover 120 is shielded on the side closer to the inside of the channel 200 than the purge hole 113, preventing the purge airflow blown out from the purge hole 113 from carrying excess matter 210 deep into the channel 200.

[0039] Optionally, the number of the protective brackets 121 is at least six, which can not only ensure effective support for the protective cover 120, but also make the outer contour of the protective cover 120 closer to a circle when it is opened, ensuring that it fits the circular contour of the channel 200, thereby ensuring the shielding effect. Specifically, in this embodiment, the number of the protective brackets 121 is six, and the six protective brackets 121 are evenly distributed along the circumference of the purge pipe 110. It can be understood that in some other embodiments, the number of protective brackets 121 can also be set according to needs.

[0040] Furthermore, the free end of the protective bracket 121 is in an arc-shaped structure, which bends toward the proximal end 111 of the purge tube 110 when the protective cover 120 is in an open state, thereby increasing the fitting area between the protective cover 120 and the channel 200 and the protective effect.

[0041] Optionally, in this embodiment, the protective portion 122 is made of elastic material, so that when the protective cover 120 switches to the open state, the protective portion 122 is stretched and the area is expanded. It is understandable that in some other embodiments, the protective portion 122 can also be made of inelastic material, for example, a structure similar to an umbrella surface is used as the protective cover 120.

[0042] Figure 5 This is a schematic diagram of the structure of the driving member 130 of the channel purge device 100 provided in this embodiment. Figure 1-Figure 5In this embodiment, the in-channel purge device 100 further includes a driving member 130, which is used to push the protective cover 120 to switch from the recovered state to the opened state under the action of the air pressure of the purge gas. Specifically, the driving member 130 includes a piston portion 131 and an elastic support arm 133 that are connected to each other. The piston portion 131 is disposed in the purge tube 110, and is used to slide relative to the purge tube 110 under the action of the air pressure of the purge gas. The purge tube 110 is provided with a through hole 117 for the elastic support arm 133 to move. The elastic support arm 133 is used to extend from the through hole 117 and support the protective bracket 121 to rotate from the recovered state to the opened state, or to retract the purge tube 110 from the through hole 117, so that the protective cover can be switched from the opened state to the recovered state.

[0043] Optionally, the elastic support arm 133 includes a first arm portion 134 and a second arm portion 135, one end of the first arm portion 134 is fixedly connected to the piston portion 131, the first arm portion 134 extends along the axis of the purge tube 110, the second arm portion 135 is connected to the other end of the first arm portion 134, and the second arm portion 135 is inclined relative to the first arm portion 134, so that the second arm portion 135 can pass through the through hole 117 and extend to the outside of the purge hole 113. Accordingly, the through hole 117 is inclined relative to the radial direction of the purge tube 110, ensuring that when the piston portion 131 moves along the radial direction of the purge tube 110, the second arm portion 135 can smoothly pass through the through hole 117 and extend out of the through hole 117.

[0044] Specifically, the piston portion 131 is in the shape of a cylindrical block, which is adapted to the inner diameter of the purge hole 113 and slidably matched with the purge hole 113. The first arm portion 134 and the second arm portion 135 are both in the shape of strips, the first arm portion 134 is arranged parallel to the axis of the piston portion 131, and one end of the first arm portion 134 is fixedly connected to the piston portion 131, one end of the second arm portion 135 is fixedly connected to the other end of the first arm portion 134, and the second arm portion 135 extends in a direction close to the radial outer side of the piston portion 131, so that the first arm portion 134 is inclined relative to the first arm portion 134. The first arm portion 134 and the second arm portion 135 form an elastic support arm 133, that is, the angle formed between the first arm portion 134 and the second arm portion 135 is variable under the action of external force.

[0045] Optionally, the number of the elastic support arms 133 is adaptively set to multiple according to the number of the protective brackets 121, and the multiple elastic support arms 133 support the multiple protective brackets 121 one by one, that is, in this embodiment, the number of the elastic support arms 133 is six. The six elastic support arms 133 are evenly distributed along the circumference of the piston part 131.

[0046] In this embodiment, when the driving member 130 is in the Figure 4When the piston portion 131 is in the position shown, the second arm portion 135 is restricted by the side wall 116 of the purge tube 110, so that the elastic support arm 133 is deformed. At this time, the angle between the first arm portion 134 and the second arm portion 135 is relatively large. Figure 4 The position shown slides relative to the purge tube 110 toward the distal end 112 of the purge tube 110 to Figure 3 When the second arm 135 moves in the position shown, the second arm 135 gradually approaches the through hole 117 with the movement of the piston 131, and when the upper end of the second arm 135 reaches the through hole 117, the limiting effect of the side wall 116 of the purge tube 110 on the second arm 135 disappears, and the second arm 135 gradually returns to its original position under the action of its own elastic force, and the angle between the first arm 134 and the second arm 135 decreases, and the second arm 135 extends out of the through hole 117. Thus, the protective bracket 121 is driven to rotate relative to the purge tube 110 through the second arm 135, so that the protective cover 120 is opened.

[0047] Furthermore, the second arm 135 has a clamping groove 136 at one end away from the first arm 134, and the clamping groove 136 is used to clamp the position-limiting protection bracket 121 to ensure the support reliability of the second arm 135 to the protection bracket 121. Specifically, the groove shape of the clamping groove 136 is adapted to the shape of the protection bracket 121.

[0048] In the present embodiment, the in-channel purging device 100 further includes an elastic member 140. The elastic member 140 is used to push the driving member 130 to reset when the air pressure in the purging tube 110 decreases, thereby switching the protective cover 120 from an open state to a retracted state. Specifically, the distal end 112 of the purging tube 110 has an end wall 114, so that the purging tube 110 forms a structure with the distal end 112 closed. Therefore, in the present embodiment, the "direction close to the distal end 112" is the direction close to the end wall 114, and correspondingly, the "direction close to the proximal end 111" is the direction away from the end wall 114. The elastic member 140 is disposed between the piston portion 131 and the end wall 114. When the piston portion 131 is moved to the position as shown in the figure below by the air pressure in the purging tube 110, the piston portion 131 is moved to the position as shown in the figure below. Figure 3 In the position shown, the elastic member 140 is compressed. When the air pressure in the purge tube 110 is lower than the elastic force of the elastic member 140, the piston portion 131 slides relative to the purge tube 110 toward the proximal end 111 of the purge tube 110 under the action of the elastic restoring force of the elastic member 140. During this process, the protective cover 120 switches to a recovery state.

[0049] Optionally, the elastic member 140 is a spring. It is understandable that in other embodiments, other structures may be provided to achieve the resetting of the driving member 130 and the protective cover 120 , such as providing a torsion spring at the hinge between the protective bracket 121 and the purge tube 110 .

[0050] Optionally, a boss 115 extending toward the piston portion 131 is provided on the end wall 114, and one end of the elastic member 140 is sleeved on the boss 115 and fixedly connected to the end wall 114, thereby fixing and limiting one end of the elastic member 140 to ensure that the deformation direction of the elastic member 140 is stable. A groove 132 is provided on the piston portion 131, and the other end of the elastic member 140 is accommodated in the groove 132 and fixedly connected to the piston portion 131, thereby fixing and limiting the other end of the elastic member 140. It can be understood that in some other embodiments, the boss 115 can also be provided on the piston portion 131, and the groove 132 can be provided on the end wall 114. Specifically, the groove 132 is located at the center of the piston portion 131, and a plurality of elastic support arms 133 are distributed around the groove 132.

[0051] like Figure 4 As shown, in this embodiment, the piston portion 131 is also used to block the purge hole 113 when the protective cover 120 is in the recovery state, so that the purge hole 113 is closed to prevent the purge medium in the purge pipe 110 from leaking; Figure 3 As shown, the piston portion 131 is also used to be staggered with the purge hole 113 when the protective cover 120 is in the open state. Specifically, at this time, the purge portion is farther away from the proximal end 111 than the purge hole 113, so that the purge hole 113 is opened, and the purge medium in the purge tube 110 is ejected from the purge hole 113, thereby purging and cleaning the excess 210 in the channel 200. Since the opening and closing of the purge hole 113 and the state switching of the protective cover 120 are controlled by the movement of the driving member 130, it is effectively ensured that the opening or retracting time of the protective cover 120 matches the purge time, avoiding the problem of delayed shielding.

[0052] Moreover, since the piston part 131 needs to overcome the elastic force of the elastic member 140 when it moves relative to the purge tube 110 toward the distal end 112 under the action of air pressure, the purge intensity of the purge medium can be controlled by setting the pre-tightening force of the elastic member 140 to ensure the purge effect.

[0053] Figure 6 for Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle. Figure 3 , Figure 4 as well as Figure 6 The arrow in the figure indicates the direction of movement of the purge medium. Figure 3 and Figure 6In this embodiment, a plurality of purge holes 113 are distributed along the circumference of the purge tube 110. The axial direction of the purge hole 113 is inclined relative to the radial direction of the purge tube 110 toward the proximal end 111 of the purge tube 110, and the projection of the axial direction of the purge hole 113 on the cross section of the purge tube 110 is inclined relative to the radial direction of the purge tube 110, so that the ejected purge medium flow is spiral. In the description of this embodiment, the "cross section of the purge tube 110" is a plane cut by a plane perpendicular to the axis L of the purge tube 110, and the "projection of the axial direction of the purge hole 113 on the cross section of the purge tube 110" is as follows: Figure 6 The direction of the air flow when it blows away from the purge hole 113 is shown in FIG.

[0054] Specifically, the axial direction of the purge hole 113 is inclined at an angle of about 1:1 relative to the radial direction of the purge tube 110 toward the proximal end 111 of the purge tube 110. Figure 3 As shown in θ, the angle of inclination of the axial projection of the purge hole 113 on the cross section of the purge tube 110 relative to the radial direction of the purge tube 110 is Figure 6 Optionally, in this embodiment, θ=30°. It can be understood that in some other embodiments, the angles of θ and β can also be specifically set according to requirements.

[0055] By setting the opening direction of the purge hole 113, the purge airflow ejected from the purge hole 113 is made to flow in a spiral reverse direction, where "reverse" means the direction away from the distal end 112, in other words, the direction close to the proximal end 111. Thus, the purge airflow generates a tangential purge force on the excess matter 210 attached to the inner wall of the channel 200, greatly improving the cleaning effect. At the same time, the spiral airflow in the channel 200 will reduce the airflow loss and increase the purge range along the way.

[0056] The channel purge device 100 and the purge system provided by the embodiment of the present invention are used by first extending the distal end 112 of the purge tube 110 into the channel 200 until the distal end 112 of the purge tube 110 is located at the portion to be purged in the channel 200, and then generating a purge airflow through a power device, and the air pressure of the purge airflow acts on the piston portion 131. When the air pressure is greater than the preload force of the elastic member 140 and is sufficient to push the elastic member 140 to be compressed, the piston portion 131 moves along the axial direction of the purge tube 110 toward the end wall 114 of the purge tube 110 (i.e., Figure 4When the end of the elastic support arm 133 moves to the position of the through hole 117, the limiting effect of the side wall 116 of the purge tube 110 on the elastic support arm 133 disappears, the elastic support arm 133 extends out of the through hole 117, and the protective bracket 121 is clamped in the clamping groove 136. As the elastic support arm 133 extends out of the through hole 117, the protective bracket 121 rotates relative to the purge tube 110, and the protective part 122 is opened, thereby forming an umbrella shape, as shown in FIG. Figure 2 and Figure 3 As shown, the protective cover 120 is switched to the open state, and the piston portion 131 moves to the side of the purge hole 113. At this time, the purge hole 113 is opened, and the purge air flow in the purge pipe 110 is ejected from the purge hole 113, as shown in FIG. Figure 3 and Figure 6 The spiral shape shown is sprayed into the channel 200, thereby cleaning the excess 210 in the channel 200, and the excess 210 leaves the channel 200 from the end of the channel 200 close to the proximal end 111 of the purge tube 110. Due to the shielding effect of the protective cover 120 and the orientation of the purge hole 113, the excess 210 is effectively prevented from penetrating into the channel 200.

[0057] After the purge is completed, the power device is turned off, the pressure of the purge air flow in the purge pipe 110 is reduced, and the elastic member 140 pushes the piston portion 131 along the axial direction of the purge pipe 110 in a direction away from the end wall 114 of the purge pipe 110 (i.e. Figure 3 The elastic support arm 133 retracts into the purge tube 110 and is elastically deformed by the limitation of the purge tube 110. The protective cover 120 switches to the recovery state. At the same time, with the movement of the piston part 131, the purge hole 113 is blocked and the purge operation is completed.

[0058] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A channel purge device, characterized in that: The channel purge device comprises: A purge pipe, the purge pipe having a proximal end and a distal end opposite to each other, the distal end of the purge pipe being provided with a purge hole, the purge hole being used to spray out a purge medium in the purge pipe; and A protective cover, comprising a plurality of protective brackets and a protective portion arranged between two adjacent protective brackets; one end of the protective bracket is hinged to the outer wall of the purge tube, and the hinge position of the protective bracket and the purge tube is farther away from the proximal end than the purge hole; the protective cover is used to switch between an open state and a recovery state under the action of the purge medium; when the protective cover is in the recovery state, the protective bracket is close to the outer wall of the purge tube, and when the protective cover is in the open state, the other end of the protective bracket is used to face the inner wall of the channel to block the purge medium from moving toward the distal end of the purge tube through the protective portion.

2. The channel purge device according to claim 1, characterized in that: The in-channel purging device also includes a driving member, which includes a piston portion and an elastic support arm that are connected to each other; the piston portion is arranged in the purging tube, and is used to slide relative to the purging tube under the pressure of the purging medium; the purging tube has a through hole for the elastic support arm to move; the elastic support arm is used to extend from the through hole and support the protective bracket to rotate from a recovered state to an open state, or to retract the purging tube from the through hole to switch the protective bracket from an open state to a recovered state.

3. The channel purge device according to claim 2, characterized in that: The elastic support arm comprises a first arm portion and a second arm portion, one end of the first arm portion is fixedly connected to the piston portion, and the first arm portion extends along the axis of the purge pipe; The second arm portion is connected to the other end of the first arm portion, and the second arm portion is inclined relative to the first arm portion; the through hole is inclined relative to the radial direction of the purge pipe.

4. The channel purge device according to claim 3, characterized in that: One end of the second arm away from the first arm has a clamping groove, and the clamping groove is used for clamping and limiting the protective bracket.

5. The channel purge device according to claim 2, characterized in that: The piston portion is used to cover the purge hole when the protective cover is in the recovery state to close the purge hole; the piston portion is also used to be staggered with the purge hole when the protective cover is in the open state to open the purge hole.

6. The channel purge device according to claim 2, characterized in that: The distal end of the purge tube has an end wall, and the in-channel purge device further comprises an elastic member arranged between the piston portion and the end wall, and the elastic member is used to apply an elastic force directed to the proximal end to the piston portion.

7. The channel purge device according to claim 6, characterized in that: A boss is arranged on one of the end wall and the piston part, and one end of the elastic member is sleeved on the boss; a groove is arranged on the other of the end wall and the piston part, and the other end of the elastic member is accommodated in the groove.

8. The channel purge device according to claim 1, characterized in that: There are multiple purge holes distributed along the circumference of the purge tube, and the axial direction of the purge hole is inclined toward the proximal end of the purge tube relative to the radial direction of the purge tube, and the projection of the axial direction of the purge hole on the cross-section of the purge tube is inclined relative to the radial direction of the purge tube, so that the ejected purge medium flow is spiral.

9. The channel purge device according to any one of claims 1 to 8, characterized in that: The protective part is made of elastic material.

10. A purge system, characterized in that: The purging system comprises a power device and the in-channel purging device according to any one of claims 1 to 9, wherein the power device is connected to a purging pipe of the in-channel purging device so as to form a purging medium flow in the purging pipe through the power device.

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