CN216269824U - Linear reciprocating type cavitation jet cleaning device - Google Patents

Abstract

The application relates to a linear reciprocating type cavitation jet flow cleaning device, which comprises a main body frame, a driving mechanism, a transmission mechanism and a nozzle assembly; the main body frame is provided with a mounting position, the driving mechanism is arranged on the mounting position, the transmission mechanism is connected with a power output end of the driving mechanism, the transmission mechanism is provided with a moving part, and the moving part can reciprocate linearly under the driving of the driving mechanism; the nozzle assembly is connected with the moving part so as to clean the to-be-cleaned part in linear reciprocating motion along with the moving part. The utility model has the characteristics of simple structure, large cleaning area, wide application range, controllable speed, safe and reliable performance and the like, and can adapt to surface cleaning operation of various shapes such as planes, cambered surfaces and the like.

Description

Linear reciprocating type cavitation jet cleaning device

Technical Field

The application belongs to the technical field of cavitation jet cleaning, and particularly relates to a linear reciprocating type cavitation jet cleaning device.

Background

When the ship works in a marine environment for a long time, a thick fouling layer mainly containing algae, shells and other marine organisms is formed on the outer surface of the ship body, and if the fouling layer is not removed in time, the running speed of the ship is seriously slowed down, the fuel consumption cost is increased, and the service life of the ship is shortened, so that the fouling on the surface of the ship needs to be removed regularly.

In recent years, the main trend is to clean the ship body by adopting a high-pressure water cavitation jet technology, the technology takes seawater or fresh water as a cleaning raw material, the ship does not need to lean against the shore, the cost is low, secondary pollution to the marine environment is avoided, meanwhile, the cavitation jet technology does not damage the ship surface coating, the operation time is short, and the efficiency is high.

However, the existing cleaning device relies on a rotary joint, the nozzle recoil is used for providing rotary power, the rotary speed is difficult to quantify and uncontrollable, meanwhile, in a high-speed and high-pressure working environment, the rotary joint is short in service life, and the cleaning device is mostly suitable for planar cleaning and is difficult to realize non-planar cleaning.

SUMMERY OF THE UTILITY MODEL

In view of the above analysis, the present invention aims to provide a linear reciprocating type cavitation jet cleaning device, which is used to solve one or more of the problems of difficulty in controlling the rotation speed, difficulty in performing non-planar cleaning and short service life of the existing cleaning device using a rotary joint.

The purpose of the utility model is realized as follows:

a linear reciprocating cavitation jet cleaning device comprising:

the main body frame is provided with a mounting position;

the driving mechanism is arranged on the mounting position;

the transmission mechanism is connected with the power output end of the driving mechanism and is provided with a moving part, and the moving part can reciprocate linearly under the driving of the driving mechanism;

and the nozzle assembly is connected with the moving part and is used for cleaning the part to be cleaned in linear reciprocating motion along with the moving part.

Further, actuating mechanism includes linear motor, and drive mechanism includes the connecting rod, and the connecting rod sets up with linear motor's first output shaft is coaxial, and the removal portion is fixed to be located on the connecting rod.

Further, the driving mechanism comprises a direct current brushless motor, and the transmission mechanism comprises a belt wheel transmission assembly and a linear motion assembly; the belt wheel transmission assembly comprises a driving belt wheel and a driven belt wheel which are arranged on the main body frame, the driving belt wheel is connected with a second output shaft of the direct-current brushless motor, and the driving belt wheel drives the driven belt wheel through a synchronous belt; the linear motion assembly comprises a screw rod and a sliding guide part, the moving part is a screw nut, the screw nut is sleeved on the screw rod, the first end of the screw rod is connected with a driven belt wheel, the second end of the screw rod is rotatably connected to the main body frame, and the sliding guide part is used for guiding the screw nut to move linearly along the screw rod.

Furthermore, the screw nut is provided with a first hole and a second hole which are arranged in parallel, the screw penetrates through the first hole, the screw is provided with a guide groove, and the wall of the first hole is protruded with a latch which is matched with the guide groove; the sliding guide part comprises a guide rod, and the guide rod is fixed on the main body frame and is slidably mounted in the second hole through a linear bearing.

Further, the guide groove is provided with a first rectangular guide groove and a second rectangular guide groove which have the same thread pitch and opposite spiral directions; still be equipped with the third hole that communicates with first hole is perpendicular on the screw nut, installs the card post in the third hole, and the front end of card post is located to the latch, and it is spacing that card post clearing hole carries out the axial with jump ring b, and the latch can block into and be located the guide way.

Further, the belt wheel transmission assembly further comprises a tension wheel fixed on the main body frame for tensioning the synchronous belt.

Furthermore, the driving mechanism also comprises a sealed shell, the sealed shell comprises a cabin body, a front cover and a tail cover, and the front cover and the tail cover are respectively installed at two ends of the cabin body in a sealing manner; the direct current brushless motor is installed in the cabin body through the sealing assembly, and a second output shaft of the direct current brushless motor is connected with the front cover in a sliding and sealing mode.

Further, the front cover comprises a sleeve and an annular connecting part arranged at the first end of the sleeve, and the front cover is sleeved on the second output shaft; a second output shaft positioned in the sleeve is sleeved with a deep groove ball bearing and H-shaped oil seals positioned on two sides of the deep groove ball bearing, and a baffle plate is arranged at the second end of the sleeve; the annular connecting part of the front cover and the front end of the cabin body and the tail cover and the rear end of the cabin body are sealed through O-shaped sealing rings.

Furthermore, an annular space is formed between the outer shell of the direct current brushless motor and the inner wall of the cabin body, and four radiating blocks are symmetrically arranged in the annular space; the cabin body is provided with a watertight joint and a driver.

Furthermore, the spray head assembly comprises a shunting block, the shunting block is provided with a main channel and two shunting channels which are communicated with the main channel and are in different directions, and each shunting channel is internally threaded with a nozzle; the main channel is connected with a water supply pipe, and the water supply pipe and the shunting block are both connected with the moving part.

Compared with the prior art, the utility model can realize at least one of the following beneficial effects:

a) the linear reciprocating type cavitation jet flow cleaning device provided by the utility model has the advantages of simple structure, large cleaning area, wide application range, controllable speed, safe and reliable performance, good stability, long service life, low cost and the like, can adapt to cleaning operation of various shapes such as planes, cambered surfaces and the like, and improves the efficiency of the cleaning operation.

b) According to the linear reciprocating type cavitation jet cleaning device, the driving mechanism has a sealing function, so that the direct current brushless motor can be used in an underwater environment, and the safety and reliability of work are ensured.

c) The linear reciprocating type cavitation jet flow cleaning device provided by the utility model has the advantages that the number of the nozzles is multiple, and the nozzles are arranged at a certain angle with each other so as to increase the spraying area.

Drawings

In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present specification, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a schematic structural view of a linear reciprocating cavitation jet cleaning device of the present invention;

FIG. 2 is a rear view of the linear reciprocating cavitation jet cleaning apparatus of the present invention;

FIG. 3 is a schematic structural diagram of the linear reciprocating cavitation jet cleaning device of the present invention for removing the front plate;

FIG. 4 is an enlarged view of a portion of area A of FIG. 3;

fig. 5 is a sectional view of a dc brushless motor of the present invention;

FIG. 6 is an enlarged partial view of the area B in FIG. 5;

FIG. 7 is a schematic view of the assembly of the main body structure of the linear motion assembly of the present invention;

FIG. 8 is a schematic view of a clip structure according to the present invention.

Reference numerals:

1-left side plate; 101-elongated adjustment holes; 2-a motor bracket; 3-a drive mechanism; 301-a dc brushless motor; 302-a heat sink; 303-watertight joints; 304-a nut; 305-a driver; 306-tail cap; 307-a cabin; 308-H type oil seal; 309-deep groove ball bearing; 310-a front cover; 311-circlip for hole a; 312-a baffle; 313-a second output shaft; 314-O-ring seals; 4-front panel a; 5-right side plate; 6-adjusting screws; 7-a nozzle; 8-a shunting block; 9-a linear motion assembly; 901-lead screw; 902-lead screw nut; 903-clamp spring for hole b; 904-linear bearing; 905-a guide bar; 906-clamp column; 907-latch; 10-front panel b; 11-a back plate; 12-a second fixture; 13-a first fixture; 131-elongated holes; 14-a driving pulley; 15-bearing flange a; 16-a driven pulley; 17-bearing flange b; 18-a buoyant material; 19-a fixing sheet; 20-nylon blocks; 21-a synchronous belt; 22-a tension wheel axle; 23-a tension wheel; 24-a tensioning block; 25-fixing the flange.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

For the purpose of facilitating understanding of the embodiments of the present application, the following description will be made in terms of specific embodiments with reference to the accompanying drawings, which are not intended to limit the embodiments of the present application.

In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the term "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection, which may be a mechanical connection, an electrical connection, which may be a direct connection, or an indirect connection via an intermediate medium. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The terms "top," "bottom," "above … …," "below," and "on … …" as used throughout the description are relative positions with respect to components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are multifunctional, regardless of their orientation in space.

One embodiment of the present invention, as shown in fig. 1-4, discloses a linear reciprocating cavitation jet cleaning device, comprising:

the main body frame is provided with a mounting position;

the driving mechanism 3 is arranged on the mounting position;

the transmission mechanism is connected with the power output end of the driving mechanism 3 and is provided with a moving part, and the moving part can reciprocate linearly under the driving of the driving mechanism 3;

and the nozzle assembly is connected with the moving part and is used for cleaning the part to be cleaned in linear reciprocating motion along with the moving part.

During cleaning, the driving mechanism 3 drives the transmission mechanism to enable the moving part of the transmission mechanism to do linear reciprocating motion, and the nozzle assembly is connected with the moving part to enable the nozzle assembly to clean the surface of the piece to be cleaned in the linear motion.

Compared with the prior art, the linear reciprocating type cavitation jet cleaning device has the advantages of simple structure, large cleaning area, wide application range, controllable speed, safe and reliable performance, good stability, long service life, low cost and the like, can adapt to cleaning operation in various shapes such as planes and cambered surfaces, and improves the efficiency of the cleaning operation.

In an alternative embodiment, the main body frame comprises a left side plate 1, a driving mechanism mounting bracket, a right side plate 5, a front plate a4, a front plate b10 and a back plate 11, wherein the left side plate 1, the driving mechanism mounting bracket, the right side plate 5, the front plate a4, the front plate b10 and the back plate 11 are fixedly connected through screws and nuts.

In this embodiment, the driving mechanism drives the nozzle assembly to perform linear reciprocating movement, which includes but is not limited to the following two driving structures:

in the first driving structure, the driving mechanism 3 includes a linear motor, the linear motor is mounted on the driving mechanism mounting bracket, the transmission mechanism includes a connecting rod, the connecting rod is coaxially arranged with the first output shaft of the linear motor, and the moving portion is fixedly arranged on the connecting rod. The first terminal surface of connecting rod is equipped with the mounting groove, and the tip of linear motor's first output shaft is fixed in the mounting groove. Illustratively, the mounting groove is provided with an internal thread, and the first output shaft of the linear motor is provided with an external thread matched with the internal thread; or, the groove wall penetrating through the mounting groove is provided with a through hole, and the first output shaft of the linear motor is fixed in the mounting groove by adopting a screw. Wherein, the moving part can be a single connecting piece and is fixed at the end part of the connecting rod; the moving part may also be a part of the link, such as an end of the link constituting the moving part.

In the second driving structure, the driving mechanism 3 includes a brushless dc motor 301, the driving mechanism includes a pulley driving assembly and a linear motion assembly 9, and the brushless dc motor 301 drives the linear motion assembly 9 through the pulley driving assembly, so as to drive the nozzle assembly to reciprocate linearly.

As shown in fig. 4, the pulley transmission assembly includes a driving pulley 14 and a driven pulley 16, which are disposed on the main body frame, the driving pulley 14 is connected to the second output shaft 313 of the dc brushless motor 301, and the driving pulley 14 drives the driven pulley 16 through a synchronous belt 21;

further, the pulley transmission assembly further includes a tension pulley 23 fixed to the main body frame for tensioning the timing belt 21, and an axis of the tension pulley 23 and an axis of the driving pulley 14 are parallel to an axis of the driven pulley 16.

As shown in fig. 7, the linear motion assembly 9 includes a lead screw 901 and a sliding guide portion, the moving portion is a lead screw nut 902, the lead screw nut 902 is sleeved on the lead screw 901, a first end of the lead screw 901 is connected to the driven pulley 16, a second end of the lead screw 901 is rotatably connected to the main body frame, an axis of the lead screw 901 is parallel to an axis of the driving pulley 14, the axis of the lead screw 901 is collinear with a center line of the driven pulley 16, and the sliding guide portion is used for guiding the lead screw nut 902 to move linearly along the lead screw 901.

The screw nut 902 is provided with a first hole and a second hole which are arranged in parallel, the screw 901 passes through the first hole, the screw 901 is provided with a guide groove, and the wall of the first hole is protruded with a latch 907 matched with the guide groove on the screw 901; the slide guide portion includes a guide bar 905 and a linear bearing 904, and the guide bar 905 is fixed to the main body frame and is slidably mounted to the second hole of the screw nut 902 through the linear bearing 904.

Further, the guide groove is provided with a first rectangular guide groove and a second rectangular guide groove which have the same thread pitch and opposite spiral directions; still be equipped with the third hole with the perpendicular intercommunication of first hole on the screw nut 902, install card post 906 in the third hole, as shown in fig. 8, the front end of card post 906 is located to latch 907, and card post 906 carries out axial spacing through hole with jump ring b903, and in latch 907 can block the guide way that is located first downthehole, the rectangle guide way through with the latch 907 cooperation of card post 906, drives screw nut 902 and moves.

Illustratively, the clamping column 906 is installed inside a third hole in the lead screw nut 902, a clamping tooth 907 is arranged at a first end of the clamping column 906, an arc end face of the clamping tooth 907 is in contact with an end face of the bottom of a rectangular guide groove of the lead screw 901, and a second end of the clamping column 906 is axially limited by a clamping spring b903 through the hole; the linear bearing 904 is fixedly mounted on the lead screw nut 902 by screws, and the linear bearing 904 is sleeved on the guide rod 905. The two side end faces of the guide rod 905 are respectively fixed with a fixing flange 25 by screws and are respectively fixedly installed on the left side plate 1 and the right side plate 5 by screws.

In this embodiment, the driving mechanism 3 has a sealing function and can be used in an underwater environment.

As shown in fig. 6, the driving mechanism 3 further includes a sealed housing, the sealed housing includes a cabin 307, a front cover 310 and a tail cover 306, the front cover 310 and the tail cover 306 are respectively mounted at two ends of the cabin 307 in a sealed manner; the dc brushless motor 301 is installed in the cabin 307 through a sealing assembly, the second output shaft 313 of the dc brushless motor 301 is connected with the front cover 310 in a sliding and sealing manner, the cabin 307 is provided with a watertight connector 303, and the cabin 307 is further provided with a driver 305.

With reference to fig. 6, the front cover 310 includes a sleeve and an annular connection portion disposed at a first end of the sleeve, and the front cover 310 is sleeved on the second output shaft 313 of the dc brushless motor 301; a second output shaft 313 positioned in the sleeve is sleeved with a deep groove ball bearing 309 and H-shaped oil seals 308 positioned at two sides of the deep groove ball bearing 309, and a baffle 312 is arranged at the second end of the sleeve; the annular connection portion of the front cover 310 and the front end of the nacelle 307, and the rear cover 306 and the rear end of the nacelle 307 are sealed by O-ring seals 314.

Illustratively, the front end of the brushless DC motor 301 is fixedly connected with a cabin 307 by screws, a deep groove ball bearing 309 is mounted in a front cover 310, axial positioning is realized by a clamp spring 311 through holes, two sides in the front cover 310 are respectively provided with an H-shaped oil seal 308, the H-shaped oil seal 308 can ensure bidirectional sealing, a baffle 312 is mounted on the front end face by screws to limit axial movement of the H-shaped oil seal 308 at the front end, and the H-shaped oil seal 308 is sleeved on a second output shaft 313 to realize rotary sealing; o-rings 314 are disposed between the front cover 310 and the body 307 and between the body 307 and the tail cover 306. Specifically, the front cover 310 is fixedly connected with the cabin 307 through screws, and an O-shaped sealing ring 314 is installed in the middle of the front cover to realize axial static sealing; the watertight connector 303 is fixed on the cabin 307 by a nut 304, the driver 305 is fixed on the tail cover 306, the tail cover 306 with the O-shaped sealing ring radially mounted is contacted with the cabin 307, and the watertight connector is axially positioned and fixed by four jackscrews.

In an alternative embodiment, as shown in fig. 5, an annular space is formed between the outer casing of the dc brushless motor 301 and the inner wall of the cabin 307, and four heat dissipation blocks 302 are symmetrically installed in the annular space, so as to facilitate heat dissipation of the dc brushless motor 301, and simultaneously, the coaxiality among the second output shaft 313, the cabin 307, and the front cover 310 can be effectively ensured.

In an alternative embodiment, one or more nozzles 7 may be installed, and a plurality of nozzles 7 are disposed at an angle to each other to increase the spray area. As shown in fig. 1 and 4, the spray head assembly comprises a diversion block 8, the diversion block 8 is provided with a main channel and two diversion channels which are communicated with the main channel and have different directions, and each diversion channel is internally threaded with a spray nozzle 7; the main channel is connected with a water supply pipe, and the water supply pipe and the shunting block 8 are both connected with the moving part.

Specifically, two nozzles 7 with a certain angle are arranged on the shunting block 8, the shunting block 8 is fixed on a first fixing piece 13, optionally, two nozzles 7 with mutually vertical axes are arranged on the shunting block 8 by pipe threads, the structure can reduce the recoil generated during water spraying without influencing the cleaning effect, simultaneously can enlarge the single cleaning width, the tail end of the shunting block 8 is connected with a high-pressure water pipe, the shunting block 8 is fixed on the first fixing piece 13 by screws, the first fixing piece 13 is fixed in a threaded hole on a lead screw nut 902 of a linear motion assembly 9 by screws, a second fixing piece 12 is arranged on the lead screw nut 902 and is used for fixing the high-pressure water pipe for supplying water to the nozzle assembly, the part of the high-pressure water pipe close to the shunting block 8 is fixed on the lead screw nut 902, the high-pressure water pipe far away from the shunting block 8 is a hose and can swing along with the movement of the lead screw nut 902, to ensure smooth water supply; meanwhile, the first fixing member 13 is provided with the strip hole 131, the lead screw nut 902 is connected with the first fixing member 13 through the nylon block 20, the nylon block 20 is an intermediate connecting member between the first fixing member 13 and the lead screw nut 902, and has corrosion resistance, the screw is connected with the nylon block 20 and the lead screw nut 902 through the strip hole 131 in the first fixing member, and the relative height between the nozzle 7 and the front plate b10 can be adjusted through the strip hole 131 in the first fixing member 13, so that the nozzle 7 can be obliquely ejected relative to the front plate b 10.

In one alternative embodiment, the dc brushless motor 301 is mounted on the motor bracket 2 by screws, the driving pulley 14 is fixedly connected to the second output shaft 313 of the dc brushless motor 301 by keys and jackscrews, one end of the second output shaft 313 is supported by the bearing flange a15, and the bearing flange a15 is mounted on the left side plate 1. That is to say, the driving pulley 14 is fixedly installed on the second output shaft 313 of the dc brushless motor 301 through a key and a jackscrew, the dc brushless motor 301 is fixedly connected with the motor bracket 2 through the front cover 310, the motor bracket 2 is fixed on the left side plate 1, and the left side plate 1 is installed with the bearing flange a15 for supporting the shaft 313, increasing the radial force that the shaft 313 can bear, and facilitating the rotary sealing effect; the driven belt pulley 16 is installed on the lead screw 901 through a key and limited by a jackscrew, two fixing flanges 25 are respectively fixed on the end surfaces of two sides of the guide rod 905 by screws, the two fixing flanges 25 are respectively and fixedly installed on the left side plate 1 and the right side plate 5 by screws, two ends of the lead screw 901 are respectively supported on a bearing flange b17 provided with an angular contact ball bearing, and bearing flanges b17 on two sides are fixedly installed on the left side plate 1 and the right side plate 5 by screws; the synchronous belt 21 is sleeved on the driving belt wheel 14 and the driven belt wheel 16, the tension wheel 23 is installed on the tension wheel shaft 22, one side of the tension wheel shaft is limited by a shaft shoulder of the tension wheel shaft 22, the other side of the tension wheel shaft is limited by a shaft clamp spring, one end of the tension wheel shaft 22 is provided with two screw threads, and the two screw threads are fixedly connected with the tension block 24 through screws; further, the tensioning block 24 is mounted on the left side plate 1 through the strip adjusting hole 101 on the left side plate 1 by the adjusting screw 6, the tensioning wheel 24 contacts with the outer side of the synchronous belt 21, and the tightness of the synchronous belt 21 is adjusted by adjusting the position of the adjusting screw 6 in the strip adjusting hole 101. When the brushless direct current motor 301 works, the synchronous belt 21 is used for driving the lead screw 901 to move, the clamping column 906 moves along the guide groove of the lead screw 901 to drive the lead screw nut 902 to move, the lead screw nut 902 makes linear motion under the limitation of the guide rod 905, meanwhile, as the lead screw 901 is provided with two rectangular guide grooves with the same processing thread pitch and opposite directions, when the clamping column 906 moves to the end of one end of the lead screw 901 along one spiral guide groove, the clamping column 906 automatically moves along the other guide groove with the opposite direction, the automatic reversing of the lead screw nut 902 is realized, and the brushless direct current motor 301 does not need reversing; the linear motion speed of the lead screw nut 902 is controlled by changing the output rotating speed of the DC brushless motor 301;

further, the cleaning device is provided with a buoyancy material 18, the buoyancy material 18 is fixed on the back plate 11 by a screw and a fixing piece 19, the density of the buoyancy material 18 is 130kg/m³The material is processed, and can provide sufficient buoyancy for the whole device.

The above embodiments are provided to explain the purpose, technical solutions and advantages of the present application in further detail, and it should be understood that the above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the scope of the present application.

Claims (10)

1. A linear reciprocating cavitation jet cleaning apparatus comprising:

the main body frame is provided with a mounting position;

the driving mechanism (3), the said driving mechanism (3) locates on said mounting position;

the transmission mechanism is connected with the power output end of the driving mechanism (3), and is provided with a moving part which can reciprocate linearly under the driving of the driving mechanism (3);

and the spray head component is connected with the moving part so as to clean the part to be cleaned along with the linear reciprocating motion of the moving part.

2. The linear reciprocating cavitation jet cleaning device according to claim 1, characterized in that the drive mechanism (3) comprises a linear motor, the transmission mechanism comprises a connecting rod, the connecting rod is arranged coaxially with a first output shaft of the linear motor, and the moving part is fixedly arranged on the connecting rod.

3. The linear reciprocating cavitation jet cleaning device according to claim 1, characterized in that the driving mechanism (3) comprises a dc brushless motor (301), the transmission mechanism comprises a pulley transmission assembly and a linear motion assembly (9);

the belt wheel transmission assembly comprises a driving belt wheel (14) and a driven belt wheel (16) which are arranged on the main body frame, the driving belt wheel (14) is connected with a second output shaft (313) of the direct-current brushless motor (301), and the driving belt wheel (14) drives the driven belt wheel (16) through a synchronous belt (21);

the linear motion assembly (9) comprises a lead screw (901) and a sliding guide part, the moving part is a lead screw nut (902), the lead screw nut (902) is sleeved on the lead screw (901), a first end of the lead screw (901) is connected with a driven belt pulley (16), a second end of the lead screw (901) is rotatably connected to the main body frame, and the sliding guide part is used for guiding the lead screw nut (902) to linearly move along the lead screw (901).

4. The linear reciprocating type cavitation jet cleaning device according to claim 3, characterized in that the lead screw nut (902) is provided with a first hole and a second hole which are arranged in parallel, the lead screw (901) passes through the first hole, the lead screw (901) is provided with a guide groove, and the wall of the first hole is protruded with a latch (907) which is matched with the guide groove;

the sliding guide part comprises a guide rod (905), and the guide rod (905) is fixed on the main body frame and is slidably mounted in the second hole through a linear bearing (904).

5. The linear reciprocating cavitation jet cleaning device in accordance with claim 4, characterized in that the guide slots have a first rectangular guide slot and a second rectangular guide slot of the same pitch and opposite spiral directions;

the lead screw nut (902) is further provided with a third hole vertically communicated with the first hole, a clamping column (906) is installed in the third hole, the clamping teeth (907) are arranged at the front end of the clamping column (906), the clamping column (906) is axially limited through a clamping spring b (903) through the hole, and the clamping teeth (907) can be clamped in the guide grooves.

6. The linear reciprocating cavitation jet cleaning device in accordance with claim 3, characterized in that the pulley transmission assembly further includes a tension pulley (23) fixed to the main body frame in preparation for tensioning the timing belt (21).

7. The linear reciprocating cavitation jet cleaning device according to claim 5, characterized in that the driving mechanism (3) further comprises a sealed housing, the sealed housing comprises a chamber body (307), a front cover (310) and a tail cover (306), the front cover (310) and the tail cover (306) are respectively and hermetically mounted at two ends of the chamber body (307);

the direct current brushless motor (301) is installed in the cabin body (307) through a sealing assembly, and a second output shaft (313) of the direct current brushless motor (301) is connected with the front cover (310) in a sliding and sealing mode.

8. The linear reciprocating cavitation jet cleaning device according to claim 7, characterized in that the front cover (310) comprises a sleeve and an annular connecting portion provided at a first end of the sleeve, the front cover (310) is sleeved on the second output shaft (313);

a deep groove ball bearing (309) and H-shaped oil seals (308) positioned on two sides of the deep groove ball bearing (309) are sleeved on a second output shaft (313) positioned in the sleeve, and a baffle plate (312) is arranged at the second end of the sleeve;

the annular connecting part of the front cover (310) and the front end of the cabin body (307) and the tail cover (306) and the rear end of the cabin body (307) are sealed through O-shaped sealing rings (314).

9. The linear reciprocating type cavitation jet cleaning device according to claim 8, characterized in that an annular space is provided between the outer casing of the brushless DC motor (301) and the inner wall of the cabin (307), and four heat dissipation blocks (302) are symmetrically arranged in the annular space;

the cabin body (307) is provided with a watertight joint (303), and the cabin body (307) is also internally provided with a driver (305).

10. The linear reciprocating cavitation jet cleaning device according to claim 1, characterized in that the nozzle assembly comprises a diverter block (8), the diverter block (8) having a main channel and two differently directed diverter channels communicating with the main channel, each of the diverter channels being internally threaded with a nozzle (7);

the main channel is connected with a water supply pipe, and the water supply pipe and the flow dividing block (8) are connected with the moving part.

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