Portable plug blowing device for pressure transmitter sampling tube

Abstract

The present application relates to the field of pipeline blowing and plugging, and particularly relates to a portable blowing and plugging device for a pressure transmitter sampling tube, which comprises a gas conveying assembly, a closing assembly and a plugging assembly, wherein the gas conveying assembly comprises a protective shell, a first gas conveying pipe arranged at one end of the protective shell, a first thread arranged on the inner wall of the protective shell, a sliding rod arranged in the protective shell, and a second thread arranged on the outer wall of the sliding rod; the closing assembly comprises a rotating disc arranged on the outer wall of the first gas conveying pipe and a closing block arranged on the outer wall of the rotating disc; and the plugging assembly comprises a first intercepting plate arranged in the protective shell, a second gas conveying pipe arranged on the outer wall of the first intercepting plate, a second intercepting plate arranged on the inner wall of the protective shell, and a ball head arranged on the outer wall of the second intercepting plate. The present application can realize blowing and plugging of the inside of the sampling tube without a gas source, and the whole device can realize protection and portability in a non-working condition.

Description

Technical Field

[0001] This invention relates to the field of pipeline purging, and in particular to a portable purging device for a pressure transmitter sampling tube. Background Technology

[0002] During the operation of pressure transmitters, dust inevitably gets trapped in the working gas. If the operating conditions of the production system change significantly or it is frequently started and stopped, dust will gradually accumulate and block the pressure transmitter pipelines over a long period of time, causing the transmitter to fail, the system pressure parameters to become distorted, and posing a great hidden danger to the production system.

[0003] In reality, pressure transmitters in power plants often need to be purged. Previously, purging required a gas source connected to the instrument, but sometimes there might not be a gas source available on-site, necessitating the use of compressed oxygen cylinders. Therefore, purging instrument lines is quite troublesome; at the same time, the equipment required for purging is numerous and inconvenient to carry. Summary of the Invention

[0004] In view of the existing problems, the present invention is proposed.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a portable purging device for a pressure transmitter sampling tube, comprising a gas supply assembly, including a protective shell, a first gas supply pipe disposed at one end of the protective shell, a first thread disposed on the inner wall of the protective shell, a slide rod disposed inside the protective shell, and a second thread disposed on the outer wall of the slide rod; and,

[0006] The closure assembly includes a rotating disk disposed on the outer wall of the first gas delivery pipe and a closure block disposed on the outer wall of the rotating disk; and,

[0007] The sealing assembly includes a first interceptor plate disposed inside the protective shell, a second gas supply pipe disposed on the outer wall of the first interceptor plate, a second interceptor plate disposed on the inner wall of the protective shell, and a ball head disposed on the outer wall of the second interceptor plate.

[0008] As a preferred embodiment of the portable blow-blocking device for the sampling tube of the pressure transmitter of the present invention, the inner wall of the protective shell is provided with a first sliding groove, the outer wall of the first gas delivery pipe is provided with a fixed plate, the outer wall of the fixed plate is provided with a first sliding channel, and the slide rod is slidably disposed inside the protective shell.

[0009] As a preferred embodiment of the portable blow-blocking device for the sampling tube of the pressure transmitter of the present invention, wherein: a closing cover is fixedly provided at one end of the slide rod, a rubber plug is fixedly provided at the other end of the slide rod, and the second thread on the outer wall of the slide rod is adapted to the first thread on the inner wall of the protective shell.

[0010] As a preferred embodiment of the portable blow-blocking device for the sampling tube of the pressure transmitter of the present invention, wherein: the outer wall of the rotating disk is provided with a trajectory platform, and the trajectory platform is distributed in a vortex pattern on the surface of the rotating disk;

[0011] The closing block is slidably disposed on the outer wall of the rotating disk, and the outer wall of the closing block is provided with a track groove adapted to the track platform. A sliding plate is fixedly provided on the outer wall of the closing block, and the closing block can slide along the inside of the first sliding channel.

[0012] As a preferred embodiment of the portable blow-blocking device for the sampling tube of the pressure transmitter of the present invention, wherein: a bearing is fixedly provided on the inner wall of the rotating disk, and the inner wall of the bearing is fixedly connected to the outer wall of the first gas delivery pipe.

[0013] In a preferred embodiment of the portable blow-blocking device for the pressure transmitter sampling tube of the present invention, the second interceptor plate is fixed to the inner wall of the protective shell, the outer wall of the second interceptor plate is provided with through holes, and the inner wall of the first interceptor plate is provided with a first annular groove.

[0014] As a preferred embodiment of the portable blow-blocking device for the sampling tube of the pressure transmitter of the present invention, wherein: the ball head is provided with a first movable channel inside, one end of the first movable channel inside the ball head extends to the outside of the ball head, and the outer wall of the ball head is provided with a second sliding groove array.

[0015] As a preferred embodiment of the portable blow-blocking device for the sampling tube of the pressure transmitter of the present invention, wherein: a first elastic element is provided inside the first movable channel, one end of the first elastic element is fixedly connected to the bottom of the first movable channel, and a conical block is provided at the other end of the first elastic element, and a first inclined surface is provided on the outer wall of the conical block.

[0016] As a preferred embodiment of the portable blow-blocking device for the sampling tube of the pressure transmitter of the present invention, wherein: a push rod is provided inside the second slide groove, one end of the push rod extends into the first movable channel and abuts against the outer wall of the first inclined surface, and a steel ball is provided inside the second slide groove;

[0017] The protective shell has a second elastic element inside.

[0018] As a preferred embodiment of the portable blow-blocking device for the sampling tube of the pressure transmitter described in this invention, a drag rod is slidably provided inside the first groove.

[0019] The beneficial effects of this invention are as follows: This invention adopts a mechanical structure and improves the existing piston-push principle. By adding an interceptor plate, the internal air is pressurized in conjunction with the piston, thereby obtaining a sealed space of compressed air. Furthermore, the ball joint connection method is improved, and the interceptor plate is released by air pressure. Then, the space difference is used to realize the blowing and blocking of the inside of the sampling tube in the absence of an air source. In addition, the whole device can achieve protection and portability when not in operation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0021] Figure 1 This is a schematic diagram of the external structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the appearance of the protective shell in this invention.

[0023] Figure 3 This is a schematic cross-sectional view of the portable blow-blocking device for the sampling tube of the pressure transmitter in this invention.

[0024] Figure 4 This is an enlarged schematic diagram of region B in this invention.

[0025] Figure 5 This is a schematic diagram of the interaction between the rotating disk and the closing block in this invention.

[0026] Figure 6 This is a schematic diagram of the cooperation between the first and second interceptor plates in this invention.

[0027] Figure 7 This is an enlarged schematic diagram of region C in this invention.

[0028] In the diagram: 100, gas delivery assembly; 101, protective shell; 101a, first gas delivery pipe; 101a-1, fixed plate; 101a-2, first sliding channel; 101b, first thread; 101c, first sliding groove; 102, slide rod; 102a, second thread; 102b, closing cover; 102c, rubber stopper; 200, closing assembly; 201, rotating disk; 201a, track platform; 202, closing block; 202a, track groove; 202b, sliding plate; 203 300. Bearing; 301. Sealing assembly; 302. First intercepting plate; 301a. Second air supply pipe; 302a-1. First movable channel; 302a-2. Second slide groove; 301b. First annular groove; 302. Second intercepting plate; 302a. Ball head; 302b. Second slide groove; 302b. Through hole; 303. First elastic element; 304. Conical block; 305. First inclined surface; 306. Push rod; 307. Steel ball; 308. Second elastic element; 309. Towing rod. Detailed Implementation

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0032] Example 1

[0033] Reference Figures 1-3 This is the first embodiment of the present invention, which provides a portable blow-off device for a pressure transmitter sampling tube. By pressurizing air and then bursting it instantly, the dust adhering to the inner wall of the pipe is flushed away.

[0034] Specifically, the gas delivery assembly 100 includes a protective housing 101, a first gas delivery pipe 101a disposed at one end of the protective housing 101, a first thread 101b disposed on the inner wall of the protective housing 101, a slide rod 102 disposed inside the protective housing 101, and a second thread 102a disposed on the outer wall of the slide rod 102; and,

[0035] The closing assembly 200 includes a rotating disk 201 disposed on the outer wall of the first gas supply pipe 101a and a closing block 202 disposed on the outer wall of the rotating disk 201; and,

[0036] The sealing assembly 300 includes a first interceptor plate 301 disposed inside the protective shell 101, a second gas supply pipe 301a disposed on the outer wall of the first interceptor plate 301, a second interceptor plate 302 disposed on the inner wall of the protective shell 101, and a ball head 302a disposed on the outer wall of the second interceptor plate 302.

[0037] The protective shell 101 is a cylindrical structure with a hollow interior. One end of the protective shell 101 is fixedly connected to a first air supply pipe 101a, which is also a hollow cylindrical structure with a radius smaller than that of the protective shell 101. The inner wall of the protective shell 101 has a first thread 101b. The slide rod 102 can slide along the inner wall of the protective shell 101, and the outer wall of the slide rod 102 has a second thread 102a at one end, with the first thread 101b and the second thread 102a being compatible.

[0038] A rotating disk 201 is provided on the outer wall of the first gas pipe 101a. The radius of the rotating disk 201 is the same as the radius of the protective shell 101, and the rotating disk 201 is attached to one end of the protective shell 101. Two closing blocks 202 are slidably provided on the other side of the rotating disk 201.

[0039] The first interceptor plate 301 is slidably disposed inside the protective shell 101. The first interceptor plate 301 has a disc structure, and its outer diameter is the same as the inner wall radius of the protective shell 101. The second interceptor plate 302 is fixed to the inner wall of the protective shell 101. The first interceptor plate 301 is fixedly connected to the second gas supply pipe 301a on the side near the first gas supply pipe 101a. The second gas supply pipe 301a can slide along the inner wall of the first gas supply pipe 101a. The second interceptor plate 302 is fixed with a ball head 302a on the side near the first interceptor plate 301. The ball head 302a is adapted to the size of the second gas supply pipe 301a.

[0040] In summary, the operator aligns the first gas supply pipe 101a with the inside of the sampling tube, and then pushes the slide rod 102. At this time, the ball head 302a fixed to the outer wall of the second interceptor plate 302 extends into the inside of the second gas supply pipe 301a. The first interceptor plate 301 and the second interceptor plate 302 are connected by the friction between the ball head 302a and the inner wall of the second gas supply pipe 301a. The slide rod 102 slides, and the first interceptor plate 301 and the slide rod 102 cooperate to compress the air inside the protective shell 101. To save effort, after pushing the slide rod 102 a certain distance, the second thread 102... When the second thread 102a contacts the first thread 101b, it begins to rotate the slide bar 102, pushing the slide bar 102 forward. When the second thread 102a rotates and disengages from the first thread 101b, the internal pressure pushes the first interceptor plate 301 away from the second interceptor plate 302. Subsequently, the gas begins to enter the first gas supply pipe 101a through the second gas supply pipe 301a. Since the radius of the first gas supply pipe 101a is smaller than the inner radius of the protective shell 101, the gas will be blown into the inner wall of the sampling tube in an ejection manner, thereby blowing away the dust on the inner wall of the sampling tube and effectively solving the problem of no gas source.

[0041] When the product is finished, the slider 102 slides into the interior of the protective shell 101, and at the same time closes the closing block 202, and then the whole thing forms a cylinder, achieving portable protection.

[0042] Example 2

[0043] Reference Figures 1-5 This is the second embodiment of the present invention, which is based on the previous embodiment, but with further optimization for portability.

[0044] Specifically, the inner wall of the protective shell 101 is provided with a first sliding groove 101c, the outer wall of the first air supply pipe 101a is provided with a fixed plate 101a-1, the outer wall of the fixed plate 101a-1 is provided with a first sliding channel 101a-2, and the slide rod 102 is slidably disposed inside the protective shell 101.

[0045] The inner wall of the protective shell 101 is symmetrically provided with two first sliding grooves 101c; the fixed disk 101a-1 is fixed to the outer wall of the first gas supply pipe 101a, and the rotating disk 201 is between the fixed disk 101a-1 and the protective shell 101. The outer wall of the fixed disk 101a-1 is symmetrically provided with two first sliding channels 101a-2, and the closing block 202 can slide inside the first sliding channel 101a-2.

[0046] A closing cover 102b is fixedly provided at one end of the slide rod 102, and a rubber plug 102c is fixedly provided at the other end of the slide rod 102. The second thread 102a on the outer wall of the slide rod 102 is adapted to the first thread 101b on the inner wall of the protective shell 101.

[0047] One end of the slide rod 102 near the outside is fixed with a closing cover 102b, which is a disc structure and has the same radius as the outer diameter of the protective shell 101. The other end of the slide rod 102 is fixed with a rubber stopper 102c, which is mainly used to achieve sealing while sliding.

[0048] The outer wall of the rotating disk 201 is provided with a track platform 201a, which is distributed in a spiral pattern on the surface of the rotating disk 201.

[0049] The closing block 202 is slidably disposed on the outer wall of the rotating disk 201, and the outer wall of the closing block 202 is provided with a track groove 202a that is adapted to the track platform 201a. The outer wall of the closing block 202 is fixedly provided with a sliding plate 202b, and the closing block 202 can slide along the inside of the first sliding channel 101a-2.

[0050] Among them, the track platform 201a on the outer wall of the rotating disk 201 is a track that expands outward with a continuously increasing radius. The side of the closing block 202 near the rotating disk 201 is provided with a track groove 202a that is adapted to the track platform 201a. The other end of the closing block 202 is fixedly connected to a sliding plate 202b, which has a semi-circular structure. When the rotating disk 201 rotates, the closing block 202 slides along the inside of the first sliding channel 101a-2.

[0051] A bearing 203 is fixedly installed on the inner wall of the rotating disk 201, and the inner wall of the bearing 203 is fixedly connected to the outer wall of the first gas supply pipe 101a.

[0052] In order to make the rotating disk 201 rotate more smoothly, the first air supply pipe 101a is directly connected to the rotating disk 201 through the bearing 203, so that the rotating disk 201 can rotate on its own.

[0053] In summary, when using the blow-blocking device, the operator first rotates the rotating disk 201. When the rotating disk 201 rotates, the track platform 201a slides along the inner wall of the track groove 202a, pushing the closing block 202 to slide along the inner wall of the first sliding channel 101a-2. The two closing blocks 202 move away from each other, exposing the first air supply pipe 101a inside. Then, the first air supply pipe 101a is inserted into the sampling tube, and the slide rod 102 is pushed. The rubber plug 102c cooperates with the first intercepting plate 301 to compress air. When the slide rod 102 is rotated and the second thread 102a disengages from the first thread 101b, the operator, the first intercepting plate 301 is pushed away from the second intercepting plate 302 by the air pressure. Then, the gas enters the first air supply pipe 101a to flush the inner wall of the sampling tube.

[0054] Example 3

[0055] Reference Figures 1-7This is the third embodiment of the present invention. This embodiment is based on the previous embodiment, but the difference is that the connection relationship between the first interceptor plate 301 and the second interceptor plate 302 is optimized.

[0056] Specifically, the second interceptor plate 302 is fixed to the inner wall of the protective shell 101, the outer wall of the second interceptor plate 302 is provided with through holes 302b, and the inner wall of the first interceptor plate 301 is provided with a first annular groove 301b.

[0057] The second gas supply pipe 301a passes through the first interceptor plate 301, and its inner wall is provided with an annular groove 301b, which is a circular annular groove.

[0058] The ball head 302a has a first movable channel 302a-1 inside, one end of which extends to the outside of the ball head 302a. The outer wall of the ball head 302a is provided with a second sliding groove 302a-2.

[0059] The ball head 302a is a spherical structure with a first movable channel 302a-1 inside. One end of the first movable channel 302a-1 extends to the outside of the ball head 302a. Six second sliding grooves 302a-2 are arranged in a circumferential array on the outer wall of the ball head 302a. One end of the second sliding groove 302a-2 is connected to the outside of the ball head 302a, and the other end is connected to the inside of the first movable channel 302a-1.

[0060] The first movable channel 302a-1 is provided with a first elastic element 303. One end of the first elastic element 303 is fixedly connected to the bottom of the first movable channel 302a-1, and the other end of the first elastic element 303 is provided with a conical block 304. The outer wall of the conical block 304 is provided with a first inclined surface 305.

[0061] The second slide 302a-2 is provided with a push rod 306 inside. One end of the push rod 306 extends into the first movable channel 302a-1 and abuts against the outer wall of the first inclined surface 305. The second slide 302a-2 is provided with a steel ball 307 inside.

[0062] The protective shell 101 has a second elastic element 308 inside.

[0063] In this design, a first elastic element 303 is provided at the bottom of the first movable channel 302a-1. This first elastic element 303 can be a compression spring or an air bladder; in this design, an air bladder is chosen. The first elastic element 303 is fixedly installed at the bottom of the first movable channel 302a-1, and a conical block 304 is installed on the surface of the first elastic element 303. The first inclined surface 305 is the outer surface of a cylindrical draft die, meaning the conical block 304 is formed after a cylindrical draft die. A push rod 306 is slidably provided inside the second slide groove 302a-2. Simultaneously, the second slide groove 302a... -2 is equipped with a steel ball 307 inside. One end of the push rod 306 abuts against the outer surface of the first inclined surface 305, and the other end abuts against the outer surface of the steel ball 307. It should be noted that the opening of the second slide groove 302a-2 near the outer wall is slightly smaller than the inner diameter of the second slide groove 302a-2, and only a part of the steel ball 307 can be exposed. The radius of the steel ball 307 is adapted to the size of the first annular groove 301b. The second elastic element 308 is a compression spring. One end of the second elastic element 308 is fixedly connected to the inner wall of the protective shell 101, and the other end is fixedly connected to the outer wall of the first interceptor plate 301.

[0064] The first slide rail 101c is equipped with a sliding rod 309.

[0065] Both ends of the tow bar 309 have a protrusion that extends into the interior of the protective shell 101. The length of the tow bar 309 is less than the length of the first slide groove 101c, and both ends of the first slide groove 101c have extra space for movement.

[0066] In summary, when the blow-blocking device is needed, the operator first rotates the rotating disk 201. The track platform 201a on the outer wall of the rotating disk 201 drives the closing block 202 to slide outward along the inner wall of the first sliding channel 101a-2 on the outer wall of the fixed disk 101a-1, and then the first air supply pipe 101a is exposed. The operator then moves the closing cover 102b and pulls the slide rod 102. When the second thread 102a contacts the first thread 101b, the operator rotates the slide rod 102. When the second thread 102a disengages from the first thread 101b, the operator continues to pull the slide rod 102. Then, the rubber plug 102c fixed at one end of the slide rod 102 will abut against the block. When the protrusion near the outer end of the tow rod 309 is touched, the tow rod 309 is pulled. The protrusion at the other end of the tow rod 309 will abut against the outer wall of the first intercepting plate 301, thereby driving the first intercepting plate 301 to move closer to the second intercepting plate 302. Then, the inner wall of the second air supply pipe 301a slides along the outer wall of the ball head 302a. When the outer wall contacts the steel ball 307, it will push the steel ball 307 to roll into the second slide groove 302a-2. At the same time, it will push the push rod 306 to press the first inclined surface 305 of the outer wall of the conical block 304. Then, the conical block 304 moves towards the bottom of the first active channel 302a-1, pressing the first elastic element 303. When the steel ball 307 reaches... When the first annular groove 301b is opened, the first elastic element 303 releases potential energy, pushing the conical block 304 to move, which in turn pushes the push rod 306 outward. Then, the exposed part of the steel ball 307 enters the first annular groove 301b, and subsequently, the first intercepting plate 301 and the second intercepting plate 302 are connected. Then, the first air supply pipe 101a is inserted into the sampling tube, pushing the slide rod 102. The rubber plug 102c cooperates with the first intercepting plate 301 to compress air. When the slide rod 102 is rotated and the second thread 102a disengages from the first thread 101b, the operator, the first intercepting plate 301 is pushed by air pressure, and the first intercepting plate 301 begins to move. At this time, the inner wall of the second air supply pipe 301a begins to squeeze the steel ball 307, the steel ball 307 pushes the push rod 306, the push rod 306 pushes the conical block 304, the conical block 304 moves to the bottom of the first active channel 302a-1, and the steel ball 307 moves into the second slide groove 302a-2. At this time, the first intercepting plate 301 and the second intercepting plate 302 begin to separate. Under the action of internal air pressure, the first intercepting plate 301 squeezes the second elastic element 308. Then, the operator pushes the slide rod 102 with the force to continue to push the internal air to blow and wash the inside of the sampling tube. By repeating the operation, the inside can be cleaned without an air source.

[0067] When the operation is completed, push the closing cover 102b into contact with the outer wall of the protective shell 101, then rotate the rotating disk 201, the two closing blocks 202 move closer to each other, and then the two sliding plates 202b come into contact, and the whole device forms a sealed cylinder, which achieves both portability and protection.

[0068] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure performing the function described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A portable blow-off device, characterized in that: The system includes a gas delivery assembly (100), comprising a protective shell (101), a first gas delivery pipe (101a) disposed at one end of the protective shell (101), a first thread (101b) disposed on the inner wall of the protective shell (101), a slide rod (102) disposed inside the protective shell (101), and a second thread (102a) disposed on the outer wall of the slide rod (102); a closure assembly (200), comprising a rotating disk (201) disposed on the outer wall of the first gas delivery pipe (101a) and a closure block (202) disposed on the outer wall of the rotating disk (201); and a sealing assembly (300), comprising a first thread (101a) disposed inside the protective shell (101). The system comprises an interceptor plate (301), a second gas supply pipe (301a) disposed on the outer wall of the first interceptor plate (301), a second interceptor plate (302) disposed on the inner wall of the protective shell (101), and a ball head (302a) disposed on the outer wall of the second interceptor plate (302); the second gas supply pipe (301a) can slide along the inner wall of the first gas supply pipe (101a), and the ball head (302a) is adapted to the size of the second gas supply pipe (301a); the inner wall of the protective shell (101) is provided with an array of first sliding grooves (101c), and the outer wall of the first gas supply pipe (101a) is provided with a fixing plate (101a-1), and the outer wall of the fixing plate (101a-1) is provided with an array of first sliding grooves (101c). A first sliding channel (101a-2) is provided, and the sliding rod (102) is slidably disposed inside the protective shell (101); a closing cover (102b) is fixedly provided at one end of the sliding rod (102), and a rubber stopper (102c) is fixedly provided at the other end of the sliding rod (102); the second thread (102a) on the outer wall of the sliding rod (102) is adapted to the first thread (101b) on the inner wall of the protective shell (101); the second intercepting plate (302) is fixed to the inner wall of the protective shell (101), and the outer wall of the second intercepting plate (302) is provided with an array of through holes (302b); the inner wall of the first intercepting plate (301) is provided with a first annular groove (301). b); The ball head (302a) is provided with a first movable channel (302a-1) inside, one end of the first movable channel (302a-1) inside the ball head (302a) extends to the outside of the ball head (302a), and the outer wall of the ball head (302a) is provided with a second sliding groove (302a-2); The first movable channel (302a-1) is provided with a first elastic member (303) inside, one end of the first elastic member (303) is fixedly connected to the bottom of the first movable channel (302a-1), and the other end of the first elastic member (303) is provided with a conical block (304), and the outer wall of the conical block (304) is provided with a first inclined surface (305);The second slide groove (302a-2) is equipped with a push rod (306) inside. One end of the push rod (306) extends into the first movable channel (302a-1) and abuts against the outer wall of the first inclined surface (305). The second slide groove (302a-2) is equipped with a steel ball (307) inside. The radius of the steel ball (307) is adapted to the size of the first annular groove (301b). The protective shell (101) is equipped with a second elastic element (308) inside. One end of the second elastic element (308) is fixedly connected to the inner wall of the protective shell (101), and the other end is fixedly connected to the outer wall of the first interceptor plate (301).

2. The portable blow-off device as described in claim 1, characterized in that: The outer wall of the rotating disk (201) is provided with a track platform (201a), and the track platform (201a) is distributed in a spiral pattern on the surface of the rotating disk (201). The closing block (202) is slidably disposed on the outer wall of the rotating disk (201), and the outer wall of the closing block (202) is provided with a track groove (202a) adapted to the track platform (201a). The outer wall of the closing block (202) is fixedly provided with a sliding plate (202b), and the closing block (202) can slide along the inside of the first sliding channel (101a-2).

3. The portable blow-off device as described in claim 1 or 2, characterized in that: The inner wall of the rotating disk (201) is fixedly provided with a bearing (203), and the inner wall of the bearing (203) is fixedly connected to the outer wall of the first gas supply pipe (101a).

4. The portable blow-off device as described in claim 1, characterized in that: A drag bar (309) is slidably provided inside the first chute (101c).

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