Spraying device

Abstract

The utility model belongs to the technical field of spray cleaning, and discloses a spray device. The spraying device comprises a cleaning pipe, a connecting piece and a spraying head. Wherein the cleaning pipe is used for introducing fluid; one end of the connecting piece is communicated with the cleaning pipe, a blocking piece and an elastic piece are arranged in the connecting piece, one end of the blocking piece can block the end, communicated with the cleaning pipe, of the connecting piece, the other end of the blocking piece is connected or connected with the elastic piece in an abutting mode, and fluid can overcome the elastic force of the elastic piece to enable the blocking piece to move in the direction away from the cleaning pipe. Fluid can enter the connecting piece; the spray head is communicated to the other end of the connecting piece and provided with spray holes, and fluid can be sprayed out of the spray holes. When the spraying device is used, fluid can compress the elastic piece through the plugging piece, so that the fluid can enter the spraying head and be sprayed out; after use, under the action of the elastic piece, the blocking piece blocks the end, communicated with the cleaning pipe, of the connecting piece again, so that the cleaning pipe is sealed, and the service life of the cleaning pipe is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of spray cleaning, in particular to a spray device. Background Art

[0002] Cleaning devices are used in the technical fields of electronic manufacturing, automobile manufacturing, food processing, and aerospace. In the prior art, the most widely used is the spray device, which has the advantages of constant spray liquid flow and wide spray range. Especially in the technical field of centrifuges, it is necessary to set a spray device in the inner cavity of the centrifuge to clean the impurities on the side wall of the inner cavity of the centrifuge, so as to ensure the normal use of the centrifuge.

[0003] However, in the prior art, after the spraying is finished, toxic gases, flammable and explosive gases and corrosive liquids will evaporate and enter the cleaning pipe from the nozzle of the spray device, thereby corroding the cleaning pipe, which in turn leads to a reduced service life of the cleaning pipe and an unsmooth cleaning process.

[0004] Therefore, there is an urgent need for a spray device that can prevent toxic gases, flammable and explosive gases, and corrosive gases from entering the cleaning pipe from the nozzle, thereby ensuring a smooth cleaning process. Utility Model Content

[0005] The utility model aims to provide a spray device to solve the problem that toxic gas, inflammable and explosive gas, and corrosive gas enter the cleaning pipe from the nozzle, thereby ensuring the service life of the cleaning pipe and the smoothness of the cleaning process.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A spray device, comprising:

[0008] A cleaning pipe, used for passing fluid;

[0009] A connecting piece, one end of which is connected to the cleaning pipe, a plugging piece and an elastic piece are arranged inside the connecting piece, one end of the plugging piece can block the end of the connecting piece connected to the cleaning pipe, and the other end of the plugging piece is connected or abutted with the elastic piece, and the fluid can overcome the elastic force of the elastic piece to move the plugging piece in a direction away from the cleaning pipe, so that the fluid can enter the connecting piece;

[0010] A spray head is connected to the other end of the connecting piece, and the spray head is provided with a spray hole, and the fluid can be sprayed out from the spray hole.

[0011] Preferably, the connecting piece includes a first pipeline and a second pipeline that are connected to each other, the first pipeline is connected to the cleaning pipe, the second pipeline is connected to the nozzle, and the diameter of the first pipeline is smaller than the diameter of the second pipeline.

[0012] Preferably, a sealing member is provided at one end of the blocking member close to the first pipeline, and the sealing member is provided on the outer periphery of the blocking member, and the sealing member can abut against the junction of the first pipeline and the second pipeline.

[0013] Preferably, the sealing member includes an extending end and a clamping portion, the extending end and the clamping portion are spaced apart along the axial direction of the sealing member, the extending end extends into the first pipeline, the clamping portion is located in the second pipeline, and the sealing member is clamped between the extending end and the clamping portion.

[0014] Preferably, an adjusting member is further provided in the connecting member, one end of the elastic member is connected to or abuts against the clamping portion, the other end of the elastic member is connected to or abuts against the adjusting member, and the adjusting member can adjust the elastic force of the elastic member.

[0015] Preferably, the blocking member further comprises a guide portion, the guide portion being connected to a side of the clamping portion away from the protruding end along the axial direction of the blocking member, and the elastic member being arranged on the outer periphery of the guide portion;

[0016] The adjusting member is provided with a through hole, the guiding portion extends into the through hole correspondingly, and the guiding portion can slide in the through hole along its axial direction.

[0017] Preferably, the cleaning pipe comprises a first pipe and a second pipe which are interconnected along the axial direction thereof, the second pipe is connected to the connecting piece, and the diameter of the second pipe is smaller than the diameter of the first pipe.

[0018] Preferably, the connecting piece is detachably connected to the second pipe, and the nozzle is detachably connected to the connecting piece.

[0019] Preferably, the outer periphery of the cleaning pipe and / or the inner wall of the cleaning pipe is sprayed with a corrosion-resistant layer; the outer surface of the elastic member is provided with a corrosion-resistant layer.

[0020] Preferably, the nozzle is spherical, and a plurality of spray holes are arranged along the radial direction of the nozzle, so that the fluid can be sprayed at multiple angles.

[0021] Beneficial effects of the utility model:

[0022] The spray device is connected between the cleaning pipe and the nozzle through a connector, and a plugging member and an elastic member are arranged in the connector. One end of the plugging member can block the end of the connector connected to the cleaning pipe, and the other end of the plugging member is elastically connected to the elastic member. When the spray device is needed for cleaning, the high-pressure liquid can compress the elastic member through the plugging member and move the plugging member in a direction away from the cleaning pipe. At this time, the fluid can enter the connector and enter the nozzle through the connector, and then spray out from the spray hole; after the spraying is finished, there is no effect of the fluid. Under the action of the elastic member, the plugging member can re-block the position where the cleaning pipe is connected to the connector. At this time, flammable and explosive gases, toxic gases and corrosive gases cannot enter the cleaning pipe, thereby preventing the inside of the cleaning pipe from being corroded, thereby ensuring smooth cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional view of the spray device provided by the utility model;

[0024] Figure 2 yes Figure 1 A partial enlarged view of part A;

[0025] Figure 3 It is a structural schematic diagram of the connecting piece provided by the utility model.

[0026] In the figure:

[0027] 10. Cleaning pipe; 11. First pipe; 12. Second pipe;

[0028] 20. Connecting member; 21. Blocking member; 211. Extending end; 212. Clamping portion; 213. Guide portion; 22. Elastic member; 23. Adjusting member; 231. Through hole; 24. First pipeline; 25. Sealing member; 26. Second pipeline; 27. Inclined side wall; 28. Connecting member;

[0029] 30. Nozzle; 31. Spray hole; 32. Connection port. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0034] However, in the prior art, after the spraying is finished, the toxic gas, flammable and explosive gas and corrosive liquid will volatilize and enter the cleaning pipe from the nozzle of the spraying device, thereby corroding the cleaning pipe, which in turn reduces the service life of the cleaning pipe and makes the cleaning process not smooth. Therefore, in order to solve this technical problem, the utility model provides a spraying device that can prevent toxic gas, flammable and explosive gas and corrosive gas from entering the cleaning pipe from the nozzle, thereby ensuring a smooth cleaning process.

[0035] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0036] like Figure 1 and Figure 2As shown, the spray device includes a cleaning pipe 10, a connector 20 and a nozzle 30. The cleaning pipe 10 is used to pass fluid; one end of the connector 20 is connected to the cleaning pipe 10, and a plugging member 21 and an elastic member 22 are arranged inside the connector 20. One end of the plugging member 21 can block the end of the connector 20 connected to the cleaning pipe 10, and the other end of the plugging member 21 is connected or abutted with the elastic member 22. The fluid can overcome the elastic force of the elastic member 22, so that the plugging member 21 moves in a direction away from the cleaning pipe 10, so that the fluid can enter the connector 20; the nozzle 30 is connected to the other end of the connector 20, and the nozzle 30 is provided with a spray hole 31, and the fluid can be sprayed out from the spray hole 31.

[0037] The spray device is connected between the cleaning pipe 10 and the nozzle 30 through a connecting piece 20, and a blocking piece 21 and an elastic piece 22 are arranged in the connecting piece 20. One end of the blocking piece 21 can block the end of the connecting piece 20 connected to the cleaning pipe 10, and the other end of the blocking piece 21 is connected to the elastic piece 22. When it is necessary to use a spray device for cleaning, the high-pressure liquid will impact the sealing member 21 in a direction away from the cleaning pipe 10. At this time, the elastic member 22 is compressed, and the fluid causes the sealing member 21 to move in a direction away from the cleaning pipe 10. At this time, the fluid can enter the connecting member 20, and since the other end of the connecting member 20 is connected to the nozzle 30, the fluid can enter the nozzle 30 through the connecting member 20 and be sprayed out from the spray hole 31; after the spraying is completed, there is no impact of the fluid. Under the action of the elastic member 22, the sealing member 21 can re-seal the position where the cleaning pipe 10 is connected to the connecting member 20. At this time, flammable and explosive gases, toxic gases and corrosive gases cannot enter the cleaning pipe 10, thereby preventing the inside of the cleaning pipe 10 from being corroded, thereby ensuring smooth cleaning.

[0038] It is worth noting that, in this embodiment, the spray device can be used in spray cleaning work in multiple technical fields such as electronic manufacturing, automobile manufacturing, food processing, aerospace, and centrifuges, and the user can select the type of fluid according to actual needs. Liquids such as clean water that can be used to wash impurities and high-speed flowing and non-corrosive gases are all within the public protection scope of this embodiment. It is further explained that in this embodiment, the elastic member 22 is a spring, the spring has a simple structure, is easy to produce and is inexpensive, and can effectively reduce the manufacturing cost of the device. In this embodiment, the elastic member 22 is connected to the plugging member 21. In other embodiments, the elastic member 22 and the plugging member 21 can also be used in abutment. In addition, other structures that can provide elastic force to reset the plugging member 21 are all within the public protection scope of this embodiment. In addition, in order to extend the service life of the elastic member 22, a corrosion-resistant layer is provided on the outer surface of the elastic member 22. The corrosion-resistant layer can be any one of epoxy resin anti-corrosion coating, asphalt anti-corrosion coating or anti-corrosion paint. As long as the structure has a good anti-corrosion effect, it is within the public protection scope of this embodiment.

[0039] Considering that after the fluid enters the connecting piece 20 from the cleaning pipe 10, excessive pressure may damage the internal structure of the connecting piece 20, therefore, Figure 1 and Figure 2 As shown, the connector 20 includes a first pipeline 24 and a second pipeline 26 that are connected to each other. The first pipeline 24 is connected to the cleaning pipe 10, and the second pipeline 26 is connected to the nozzle 30. The diameter of the first pipeline 24 is smaller than the diameter of the second pipeline 26. According to the Bernoulli principle, under the premise of a constant flow rate, the smaller the pipeline diameter, the greater the flow rate of the fluid flowing through the pipeline. On the contrary, the larger the pipeline diameter, the smaller the flow rate of the fluid flowing through the pipeline. Since the diameter of the second pipeline 26 is larger than the diameter of the first pipeline 24, the flow rate of the fluid in the second pipeline 26 is smaller than the flow rate in the first pipeline 24, which can reduce the impact of the fluid on the inside of the connector 20, thereby extending the service life of the connector 20. It is worth noting that in this embodiment, the first pipeline 24 and the second pipeline 26 are connected by an inclined side wall 27. This structure can evenly reduce the flow rate of the fluid when it enters the second pipeline 26 from the first pipeline 24.

[0040] To further ensure the sealing effect, Figure 1 and Figure 2 As shown, a sealing member 25 is provided at one end of the blocking member 21 close to the first pipeline 24 . The sealing member 25 is provided on the outer periphery of the blocking member 21 . The sealing member 25 can abut against the junction of the first pipeline 24 and the second pipeline 26 . When no fluid is passed into the cleaning pipe 10, the sealing member 25 abuts against the inclined side wall 27 at the junction of the first pipeline 24 and the second pipeline 26. When the fluid is passed into the cleaning pipe 10, the fluid pushes the blocking member 21 to compress the elastic member 22 and causes the blocking member 21 to move away from the cleaning pipe 10. At this time, the sealing member 25 is separated from the inclined side wall 27, so that a gap is formed between the outer periphery of the sealing member 22 and the inner side of the second pipeline 26. The fluid can enter the second pipeline 26 from this gap and then be sprayed out from the nozzle 30. When the fluid stops passing into the cleaning pipe 10, the elastic force of the elastic member 22 pushes the blocking member 21 to move in the direction close to the cleaning pipe 10 and re-blocks the end of the connecting member 20 connected to the cleaning pipe 10. At this time, the sealing member 25 abuts against the inclined side wall 27 again, thereby forming a seal for the cleaning pipe 10.

[0041] It is worth noting that in this embodiment, the sealing member 25 is a sealing rubber ring, which has a simple structure, is easy to install, and is inexpensive, and can effectively reduce the manufacturing cost of the device. In other embodiments, a sealing gasket or the like can be used instead of the sealing rubber ring, and any structure that can ensure the sealing effect on the cleaning pipe 10 is within the scope of disclosure of this embodiment.

[0042] like Figure 1 and Figure 2As shown, the plugging member 21 includes an extended end 211 and a clamping portion 212, the extended end 211 and the clamping portion 212 are arranged at intervals along the axial direction of the plugging member 21, the extended end 211 extends into the first pipeline 24, the clamping portion 212 is located in the second pipeline 26, and the sealing member 25 is clamped between the extended end 211 and the clamping portion 212. In this arrangement, by clamping the sealing member 25 between the extended end 211 and the clamping portion 212, it can be ensured that when the plugging member 21 reciprocates along its axial direction under the push of the fluid and the elastic member 22, the sealing member 25 will not deviate from its preset position, so that a good sealing effect can be always maintained. In addition, since the sealing member 25 is clamped between the extended end 211 and the clamping portion 212, it is convenient to disassemble and replace the sealing member 25 later.

[0043] Considering that different fluids are introduced, the pressure generated is different. Therefore, in order to facilitate the adjustment of the elastic force of the elastic member 25, as shown in FIG. Figure 1-Figure 3 As shown, an adjusting member 23 is also provided in the connecting member 20, one end of the elastic member 22 is connected or abutted to the clamping portion 212, and the other end of the elastic member 22 is connected or abutted to the adjusting member 23, and the adjusting member 23 can adjust the elastic force of the elastic member 22. When the pressure generated by the fluid is relatively large, the elastic force of the elastic member 22 needs to be increased, and the adjusting member 23 can be moved toward the direction close to the cleaning pipe 10 to compress the elastic member 22 and generate a greater elastic force; if the elastic force of the elastic member 22 needs to be reduced, the adjusting member 23 can be moved toward the direction of the cleaning pipe 10 to reduce the elastic force of the elastic member 22, and the operation is simple and convenient.

[0044] like Figure 1-Figure 3 As shown, the plugging member 21 further includes a guide portion 213, which is connected to the side of the clamping portion 212 away from the protruding end 211 along the axial direction of the plugging member 21, and the elastic member 22 is arranged on the outer periphery of the guide portion 213; the adjusting member 23 is provided with a through hole 231, and the guide portion 213 extends into the through hole 231 accordingly, and the guide portion 213 can slide along its axial direction in the through hole 231. This arrangement can ensure that the plugging member 21 will not deviate from the preset direction when pushed by the pressure of the fluid or the elastic force of the elastic member 22, thereby ensuring that it will not be stuck inside the second pipeline 26, thereby ensuring a good use effect.

[0045] like Figure 1 and Figure 2As shown, the cleaning pipe 10 includes a first pipe 11 and a second pipe 12 which are interconnected along the axial direction thereof, the second pipe 12 is connected to the connecting piece 20, and the diameter of the second pipe 12 is smaller than the diameter of the first pipe 11. Since the fluid enters the connecting piece 20 after passing through the second pipe 12, and before entering the connecting piece 20, it is necessary to push the blocking piece 21, so by reducing the diameter of the second pipe 12, the flow rate can be increased after the fluid enters the second pipe 12 from the first pipe 11, thereby ensuring that the fluid has enough power to push the blocking piece 21 in a direction away from the cleaning pipe 10, thereby completing the corresponding spray cleaning work.

[0046] It is worth noting that, for the convenience of installation, the connecting member 20 is detachably connected to the second pipe 12, and the nozzle 30 is also detachably connected to the connecting member 20. Figure 1 and Figure 2 As shown, one end of the connector 20 connected to the second pipe 12 is also provided with a connecting portion 28, the connecting portion 28 is provided with an internal thread, and the outer peripheral side wall of the second pipe 12 is provided with an external thread. The second pipe 12 forms a threaded connection with the internal thread of the connecting portion 28 through the external thread, which not only ensures the detachable connection between the second pipe 12 and the connector 20, but also enables the connecting portion 28 to cover the outer peripheral side wall of the second pipe 12, thereby protecting the outer peripheral side wall of the second pipe 12 from being easily worn and corroded, thereby extending the service life; in addition, the outer peripheral side wall of the connector 20 is provided with an external thread, and the inner peripheral side wall of the connection port 32 of the nozzle 30 is provided with an internal thread, and the two are again connected by internal and external threads, thereby ensuring the detachable effect. In other embodiments, the cleaning pipe 10, the connector 20 and the nozzle 30 can be connected in sequence by means of clamping or the like, as long as it can be ensured that each two adjacent components of the three are detachably connected, which is convenient for installation, maintenance and replacement, and no other restrictions are made in this embodiment.

[0047] Considering that the periphery of the cleaning pipe 10 may be corroded by gas or liquid, a corrosion-resistant layer is provided on the periphery of the cleaning pipe 10 and / or the inner wall of the cleaning pipe 10 to prevent toxic gases, corrosive gases or liquids from corroding the cleaning pipe 10 from the outside, thereby extending the service life of the cleaning pipe 10. It is worth noting that in the present embodiment, due to the presence of the seal 25, it is sufficient to provide a corrosion-resistant layer only on the periphery of the cleaning pipe 10, which can achieve the purpose of reducing costs. In other embodiments, the location of the corrosion-resistant layer in the cleaning pipe 10 can be selected according to actual needs, and no other limitations are made in the present embodiment. It is further explained that the corrosion-resistant layer can be any one of epoxy resin anti-corrosion coating, asphalt anti-corrosion coating or anti-corrosion paint, as long as the structure has a good anti-corrosion effect, it is within the public protection scope of this embodiment.

[0048] like Figure 1As shown, in order to ensure a good cleaning effect, the nozzle 30 is spherical as a whole, and a plurality of spray holes 31 are arranged radially of the nozzle 30 so that the fluid can be sprayed at multiple angles. This arrangement ensures that a spray device is arranged inside the container to be cleaned, and the fluid can be sprayed to multiple corners inside the container to be cleaned, without the need to arrange multiple spray devices, thereby improving the cleaning efficiency.

[0049] When using the spray device provided in this embodiment, first fix the cleaning pipe 10 in a suitable position, then introduce fluid into the cleaning pipe 10, the fluid pushes the blocking member 21 to move in a direction away from the cleaning pipe 10, at this time the elastic member 22 is in a compressed state, the fluid can enter the connecting member 20 from the gap, and enter the nozzle 30 through the connecting port 32, and finally spray into the container to be cleaned through multiple spray holes 31, completing the cleaning. When the cleaning is completed, stop introducing fluid into the cleaning pipe 10, at this time there is no fluid push, the elastic force of the elastic member 22 pushes the blocking member 21 to move in a direction close to the cleaning pipe 10, and re-blocks the position where the connecting member 20 is connected to the cleaning pipe 10, the sealing member 25 abuts against the inclined side wall 27, at this time neither gas nor liquid can enter the interior of the cleaning pipe 10, thereby completing the sealing of the cleaning pipe 10 and ensuring that the interior will not be corroded.

[0050] In summary, the use of the spray device provided in this embodiment can ensure the sealing of the cleaning pipe 10 and the smoothness of the cleaning process.

[0051] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A spray device, characterized in that: include: A cleaning pipe (10) for passing fluid; A connecting piece (20), one end of which is in communication with the cleaning pipe (10), a blocking piece (21) and an elastic piece (22) are arranged inside the connecting piece (20), one end of the blocking piece (21) can block the end of the connecting piece (20) in communication with the cleaning pipe (10), the other end of the blocking piece (21) is connected to or abuts against the elastic piece (22), the fluid can overcome the elastic force of the elastic piece (22), so that the blocking piece (21) moves in a direction away from the cleaning pipe (10), so that the fluid can enter the connecting piece (20); A spray head (30) connected to the other end of the connecting member (20), the spray head (30) being provided with a spray hole (31), and the fluid can be sprayed out from the spray hole (31); The connecting piece (20) comprises a first pipeline (24) and a second pipeline (26) which are connected to each other, the first pipeline (24) is connected to the cleaning pipe (10), the second pipeline (26) is connected to the nozzle (30), and the diameter of the first pipeline (24) is smaller than the diameter of the second pipeline (26); A sealing member (25) is provided at one end of the blocking member (21) close to the first pipeline (24); the sealing member (25) is arranged on the outer periphery of the blocking member (21); and the sealing member (25) can abut against the junction of the first pipeline (24) and the second pipeline (26).

2. The spray device according to claim 1, characterized in that: The plugging member (21) comprises a protruding end (211) and a clamping portion (212); the protruding end (211) and the clamping portion (212) are arranged at intervals along the axial direction of the plugging member (21); the protruding end (211) extends into the first pipeline (24); the clamping portion (212) is located in the second pipeline (26); and the sealing member (25) is clamped between the protruding end (211) and the clamping portion (212).

3. The spray device according to claim 2, characterized in that: An adjusting member (23) is also provided in the connecting member (20); one end of the elastic member (22) is connected to or abuts against the clamping portion (212); the other end of the elastic member (22) is connected to or abuts against the adjusting member (23); and the adjusting member (23) is capable of adjusting the elastic force of the elastic member (22).

4. The spray device according to claim 3, characterized in that: The blocking member (21) further comprises a guide portion (213), the guide portion (213) being connected to a side of the clamping portion (212) away from the protruding end (211) along the axial direction of the blocking member (21), and the elastic member (22) being arranged on the outer periphery of the guide portion (213); The adjusting member (23) is provided with a through hole (231), the guiding portion (213) correspondingly extends into the through hole (231), and the guiding portion (213) can slide in the through hole (231) along its axial direction.

5. The spray device according to any one of claims 1 to 4, characterized in that: The cleaning pipe (10) comprises a first pipe (11) and a second pipe (12) which are connected to each other along the axial direction thereof; the second pipe (12) is connected to the connecting piece (20); and the diameter of the second pipe (12) is smaller than the diameter of the first pipe (11).

6. The spray device according to claim 5, characterized in that: The connecting piece (20) is detachably connected to the second pipe (12), and the nozzle (30) is detachably connected to the connecting piece (20).

7. The spray device according to any one of claims 1 to 4, characterized in that: The outer periphery of the cleaning pipe (10) and / or the inner wall of the cleaning pipe (10) are provided with a corrosion-resistant layer; The outer surface of the elastic member (22) is provided with a corrosion-resistant layer.

8. The spray device according to any one of claims 1 to 4, characterized in that: The spray head (30) is spherical, and a plurality of spray holes (31) are arranged along the radial direction of the spray head (30), so that the fluid can be sprayed at multiple angles.

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