A hydraulic cylinder cleaning device

Abstract

A hydraulic cylinder cleaning device, including a casing (10), a vibrating plate (20) and a limiting plate frame (40), the vibrating plate (20) includes a first vibrating plate (2a) horizontally arranged in the cleaning bin (101) and a second vibrating plate (2b) perpendicular to the first vibrating plate (2a), the inside of the first vibrating plate (2a) and the second vibrating plate (2b) are provided with a plurality of ultrasonic transducers (21) electrically connected with the ultrasonic generator, so that the first vibrating plate (2a) can emit ultrasonic waves parallel to the hydraulic cylinder axis, and the second vibrating plate (2b) can emit ultrasonic waves perpendicular to the hydraulic cylinder axis; the two kinds of direction staggered ultrasonic waves combine to clean the hydraulic cylinder in all directions, which can not only clean the inner cylinder of the hydraulic cylinder, but also clean the small holes on the wall of the hydraulic cylinder, and better cleaning effect can be obtained.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic cylinder cleaning technology, specifically referring to a hydraulic cylinder cleaning device. Background Technology

[0002] A hydraulic rod is a device that uses hydraulic principles to transmit and convert force. When hydraulic oil enters a hydraulic cylinder, it is affected by pressure and then transmitted to the piston, causing the piston rod to extend and retract. During the processing of a hydraulic rod, the components need to be cleaned to remove oil stains and ensure the quality and performance of the assembled rod. Since the hydraulic cylinder has multiple hole structures and is also a major component of the hydraulic rod, cleaning is a crucial step in the processing of the hydraulic cylinder. The cleaning of the hydraulic cylinder is carried out in an ultrasonic cleaning machine. However, because there are small holes (oil inlet, oil outlet, and vent holes) at different positions on the hydraulic cylinder, and the direction of the holes is usually perpendicular to the direction of the inner cylinder.

[0003] Currently, cleaning typically involves placing the cylinder components vertically or horizontally inside the cleaning machine. When placed vertically, the bubbles generated by ultrasonic vibration in the cleaning tank float upwards and burst, making it easy to clean the inner cylinder. However, the cleaning effect is poor at small holes. When placed horizontally, although the cleaning effect on small holes is good, residue is easily left inside the cylinder, resulting in incomplete cleaning. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention creatively employs a hydraulic cylinder cleaning device to at least partially solve the problems mentioned in the background art.

[0005] The technical solution adopted is as follows: This embodiment of the invention proposes a hydraulic cylinder cleaning device, comprising:

[0006] The casing is a hollow cylinder with a cleaning chamber at the upper end and a circulating liquid storage chamber at the lower end.

[0007] A vibrating plate is installed inside the cleaning chamber and is electrically connected to an external ultrasonic generator.

[0008] A limiting plate frame is installed inside the cleaning chamber, which enables multiple sets of hydraulic cylinders to stand vertically in parallel inside the cleaning chamber.

[0009] The vibrating plate includes a first vibrating plate horizontally arranged in the cleaning chamber and a second vibrating plate perpendicular to the first vibrating plate. Both the first and second vibrating plates are equipped with multiple ultrasonic transducers electrically connected to the ultrasonic generator, so that the first vibrating plate can emit ultrasonic waves parallel to the axis of the hydraulic cylinder and the second vibrating plate can emit ultrasonic waves perpendicular to the axis of the hydraulic cylinder.

[0010] Furthermore, it also includes:

[0011] A cover plate, located at the top of the housing, and

[0012] A circulation pump installed inside the circulation storage tank is used to draw out the cleaning fluid from the circulation storage tank and deliver it to the cleaning tank.

[0013] The cover plate has a liquid distribution chamber inside, and the bottom surface of the cover plate has a plurality of evenly distributed drain holes that communicate with the liquid distribution chamber. A hose is provided between the cover plate and the circulation pump, so that the circulation pump draws the cleaning fluid from the circulation storage chamber and delivers it to the liquid distribution chamber through the hose. After being guided by the plurality of drain holes, the fluid enters the cleaning chamber along the axis of the hydraulic cylinder.

[0014] Furthermore, the limiting plate frame is provided with multiple holes for placing the hydraulic cylinder. Along the axial direction of the hydraulic cylinder, the limiting plate frame is provided with one or more holes, so that the hydraulic cylinder can be restricted in a vertical position within the holes.

[0015] Furthermore, a screen plate parallel to the limiting plate frame is provided above the first vibrating plate, the screen plate is located below the limiting plate frame, and the distance between the screen plate and the first vibrating plate is greater than 10mm.

[0016] Furthermore, a guide groove is provided around the edge of the hole, and the guide groove is arranged opposite to the direction of fluid flow. The guide groove is constructed as an arc-shaped groove to guide the fluid flow perpendicular to the limiting plate to the surface of the hydraulic cylinder.

[0017] Furthermore, the limiting plate frame is provided with a protruding guide block between each of the holes, the protrusion direction of the guide block is opposite to the liquid flow direction, and the guide block is constructed as a hemisphere or a pyramid.

[0018] A flow channel is provided at the center of the guide block, allowing some of the liquid flow to pass through the limiting plate frame. The flow channel is parallel to or inclined to the axis of the hydraulic cylinder.

[0019] Furthermore, the second vibrating plate is configured as a column with a cross-shaped cross section, and the first vibrating plate has a cross-shaped first drain port corresponding to the second vibrating plate. The cross-sectional size of the first drain port is larger than the cross-sectional size of the second vibrating plate, so that the cleaning fluid in the cleaning chamber can flow into the circulating storage chamber from the first drain port.

[0020] The first drain outlet has a supporting rib on its inner side, and the second vibrating plate is fixed to the supporting rib.

[0021] Furthermore, a filter plate is provided between the circulating liquid storage tank and the cleaning tank. The filter plate is arranged parallel to the limiting plate frame and is used to filter the cleaning liquid entering the circulating liquid storage tank.

[0022] Furthermore, the upper side of the filter plate is provided with a partition parallel to the limiting plate frame, the upper side of the partition is provided with a detection channel communicating with the first drain port, a liquid distribution channel is provided between the partition and the filter plate, and a second drain port is provided between the partition and the housing for communication between the detection channel and the liquid distribution channel.

[0023] The detection channel is constructed in the shape of a funnel, and a turbidimeter is provided inside the detection channel for detecting the turbidity of the cleaning fluid inside the detection channel.

[0024] Furthermore, the filter plate includes a filter element and a plurality of guide plates disposed on the top of the filter element. The plurality of guide plates are evenly distributed along the length direction of the second drain port and are used to evenly guide the cleaning liquid entering the second drain port into the liquid distribution channel.

[0025] The beneficial effects achieved by the present invention using the above structure are as follows:

[0026] (1) The machine housing is equipped with horizontal and vertical vibration plates that can emit ultrasonic waves parallel to and perpendicular to the hydraulic cylinder axis. The combination of the two directions of ultrasonic waves cleans the hydraulic cylinder from all directions. It can not only clean the inner cylinder of the hydraulic cylinder, but also clean the small holes on the hydraulic cylinder wall, thus achieving a better cleaning effect.

[0027] (2) The limit plate frame can stably place multiple hydraulic cylinders in an upright position. During the cleaning process, it can promote the discharge of oil stains and prevent oil stains from adhering and accumulating in the hydraulic cylinders, thereby achieving a clean cleaning effect in one go and achieving a better cleaning effect. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of a hydraulic cylinder cleaning device proposed in an embodiment of the present invention;

[0029] Figure 2 This is a three-dimensional structural diagram of the vibration plate, cover plate, and limiting plate frame proposed in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the internal structure of a hydraulic cylinder cleaning device according to an embodiment of the present invention;

[0031] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the AA direction;

[0032] Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure along the BB direction;

[0033] Figure 6 This is a partially enlarged structural diagram of the limiting plate frame proposed in an embodiment of the present invention.

[0034] Among them, 10 is the casing; 101 is the cleaning chamber; 102 is the first drain outlet; 103 is the detection channel; 104 is the second drain outlet; 105 is the liquid distribution channel; 106 is the circulating liquid storage tank; 20 is the vibrating plate; 2a is the first vibrating plate; 2a1 is the supporting rib; 2b is the second vibrating plate; 21 is the ultrasonic transducer; 30 is the cover plate; 300 is the liquid distribution tank; 301 is the drain hole; 31 is the liquid inlet pipe; 40 is the limiting plate frame; 401 is the hole position; 402 is the guide groove; 41 is the guide block; 410 is the flow guiding channel; 50 is the screen plate; 60 is the filter plate; 61 is the flow guiding plate; 62 is the filter element; 70 is the circulating pump; 71 is the drain pipe; 72 is the hose; and 80 is the turbidity meter.

[0035] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0037] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments.

[0038] Because hydraulic cylinder components may have lubricating oil or other contaminants adhering to their surfaces during machining, they need to be thoroughly cleaned before assembly. Currently, the cleaning of hydraulic cylinders involves directly placing them in a cleaning tank. However, since the cleaning fluid in the tank is stagnant, the washed-out oil floats within, potentially altering the direction of ultrasonic wave propagation. This prevents the ultrasonic waves from effectively reaching the surface of the components being cleaned. Furthermore, the oil may cover the surface of the components, weakening the cavitation effect of the ultrasonic waves in the liquid, thus resulting in a poor cleaning effect.

[0039] like Figure 1 and Figure 2 As shown, this embodiment of the invention provides a hydraulic cylinder cleaning device, which aims to solve the problem of incomplete and inefficient cleaning of pipes with porous surfaces, especially hydraulic cylinders. The device mainly includes a housing 10, a vibrating plate 20, and a limiting plate frame 40.

[0040] The housing 10 is a hollow cylinder with a cross-section of a circle, rectangle or other regular polygon. The upper part of the housing 10 is provided with a cleaning chamber 101 to accommodate the parts to be cleaned, and the lower part is provided with a circulating liquid storage chamber 106 to store the cleaning liquid for recycling.

[0041] Furthermore, the vibrating plate 20 is disposed inside the cleaning chamber 101 and is electrically connected to an external ultrasonic generator.

[0042] In order to enable the vibrating plate 20 to emit ultrasonic waves from multiple directions of the parts, so as to improve the cleaning effect of porous pipes, especially hydraulic cylinders, the vibrating plate 20 includes a first vibrating plate 2a horizontally arranged in the cleaning chamber 101 and a second vibrating plate 2b perpendicular to the first vibrating plate 2a.

[0043] The first vibrating plate 2a and the second vibrating plate 2b are each equipped with multiple ultrasonic transducers 21 that are electrically connected to the ultrasonic generator. This allows the first vibrating plate 2a to emit ultrasonic waves parallel to the axis of the hydraulic cylinder, and the second vibrating plate 2b to emit ultrasonic waves perpendicular to the axis of the hydraulic cylinder. This enables the vibrating plate 20 to emit ultrasonic waves to the hydraulic cylinder from at least two directions to improve the cleaning effect.

[0044] The ultrasonic waves emitted by the ultrasonic transducer 21 inside the first vibrating plate 2a are parallel to the axis of the hydraulic cylinder. The ultrasonic beam will form a rotating or spiral flow inside the pipe, so that the cleaning fluid can more comprehensively cover the inner wall of the pipe, reduce cleaning dead angles, and facilitate the cleaning of the micropores on the pipe wall.

[0045] The ultrasonic transducer 21 inside the second vibrating plate 2b can emit ultrasonic waves perpendicular to the axis of the hydraulic cylinder. The ultrasonic beam will directly impact the inner wall of the pipe, forming a strong cavitation effect and impact force, which helps to remove oil and impurities from the inner wall of the pipe. This method has a good cleaning effect on the inner wall of the pipe.

[0046] Thus, by setting up vibrating plates 20 arranged horizontally and vertically, ultrasonic waves parallel and perpendicular to the hydraulic cylinder axis can be emitted. The combination of these two intersecting ultrasonic waves cleans the hydraulic cylinder from all directions, cleaning not only the inner cylinder but also the small holes on the cylinder wall, achieving a better cleaning effect.

[0047] Furthermore, during the cleaning of hydraulic cylinders, the washed-out oil will be discharged with the cleaning fluid. However, when the hydraulic cylinder is placed horizontally, the oil inside is prone to remain, and air may be trapped inside the hydraulic cylinder, affecting the propagation of ultrasonic waves and cavitation effect. Therefore, a limiting plate frame 40 is set inside the cleaning chamber 101. The limiting plate frame 40 can make multiple sets of hydraulic cylinders stand vertically in parallel inside the cleaning chamber 101.

[0048] In some embodiments, the limiting plate frame 40 is provided with a plurality of holes 401 for placing hydraulic cylinders. Along the axial direction of the hydraulic cylinder, the limiting plate frame 40 is provided with one or more holes 401, so that the hydraulic cylinder can be restricted in a vertical position within the holes 401. Above the first vibrating plate 2a, there is a screen plate 50 parallel to the limiting plate frame 40. The screen plate 50 is located below the limiting plate frame 40, and the distance between the screen plate 50 and the first vibrating plate 2a is greater than 10mm.

[0049] Thus, before cleaning, the hydraulic cylinders are placed vertically in the holes 401 on the limit plate frame 40, with the pipe openings of the hydraulic cylinders facing the screen plate 50. The screen plate 50 is generally made of woven metal wire mesh, which serves to support the hydraulic cylinders and allow the oil to flow to the bottom of the screen plate 50, preventing it from remaining in the hydraulic cylinders.

[0050] In this embodiment, the limiting plate frame 40 can stably place multiple sets of hydraulic cylinders in an upright position. During the cleaning process, it can promote the discharge of oil stains and prevent oil stains from adhering and accumulating inside the hydraulic cylinders, thereby achieving a clean cleaning effect in one go and achieving a better cleaning effect.

[0051] The number of limiting plate frames 40 can be set according to the number and position of the micro-holes on the hydraulic cylinder. Setting the limiting plate frames 40 at the same height as the micro-holes on the hydraulic cylinder allows the liquid flow to move horizontally after reaching the limiting plate frames 40 and flow towards the micro-holes, discharging the oil stains that have been cleaned and removed from the micro-holes. It can also accelerate the cavitation effect and impact force generated by the ultrasonic waves, thereby improving the cleaning efficiency of the micro-holes.

[0052] Furthermore, in order to guide the fluid flow to the micro-holes on the hydraulic cylinder, a guide groove 402 is provided around the edge of the hole 401, and the guide groove 402 is set opposite to the fluid flow direction (in this embodiment, the fluid flow direction is from top to bottom, and the direction of the guide groove 402 is upward, opposite to the fluid flow direction). The guide groove 402 is constructed as an arc-shaped groove to guide the fluid flow of the vertical limiting plate frame 40 to the surface of the hydraulic cylinder.

[0053] Thus, when the liquid flow reaches the guide groove 402, it will be guided by the guide groove 402 and impact the surface of the hydraulic cylinder. After the height of the limit plate frame 40 is set at the height of the micro hole on the hydraulic cylinder, the liquid flow will be guided towards the micro hole and impact the micro hole, making the cleaning effect of the micro hole better.

[0054] like Figure 6 As shown, further, in order to increase the flow rate of the fluid to the micro-holes on the hydraulic cylinder, a protruding guide block 41 is provided on the limit plate frame 40 between each hole 401. The protruding direction of the guide block 41 is opposite to the fluid flow direction. The guide block 41 is constructed as a hemisphere or a pyramid to increase the contact area between the fluid and the inclined surface, thereby increasing the flow rate to the micro-holes on the hydraulic cylinder.

[0055] In some embodiments, a flow channel 410 is provided at the center of the guide block 41, so that part of the liquid flow can pass through the flow channel 410 and pass through the limiting plate frame 40. The flow channel 410 is parallel or inclined to the axis of the hydraulic cylinder. When the number of limiting plate frames 40 is set to two or three, part of the liquid flow can pass through the upper limiting plate frame 40 and reach the lower limiting plate frame 40 along the flow channel 410. Under the action of the guide groove 402 and the guide block 41, it continues to impact the upper and lower micro-holes of the hydraulic cylinder.

[0056] like Figure 1 and Figure 3 As shown, the device also includes a cover plate 30, which is provided to seal the top of the housing 10, and a circulation pump 70 is provided inside the circulation storage tank 106. The circulation pump 70 is used to draw the cleaning fluid in the circulation storage tank 106 and deliver it to the cleaning tank 101.

[0057] The cover plate 30 has a liquid distribution chamber 300 inside, and the bottom surface of the cover plate 30 has a plurality of evenly distributed drain holes 301 that communicate with the liquid distribution chamber 300. The outer side wall of the cover plate 30 has an inlet pipe 31 that communicates with the liquid distribution chamber 300. The output end of the circulation pump 70 has a drain pipe 71 that extends out of the housing 10. A flexible hose 72 is provided between the cover plate 30 and the circulation pump 70. The two ends of the flexible hose 72 are connected to the inlet pipe 31 and the drain pipe 71, respectively.

[0058] In use, the circulating pump 70 draws the cleaning fluid from the circulating storage tank 106 and delivers it to the distribution tank 300 through the hose 72. After being guided by multiple drain holes 301, it enters the cleaning chamber 101 along the axis of the hydraulic cylinder.

[0059] In this embodiment, the cover plate 30 allows the cleaning fluid to flow along the axis of the hydraulic cylinder. The continuous flow of the cleaning fluid ensures that the dirt removed from the inside and surface of the hydraulic cylinder is carried away in time, preventing it from re-adhering to the hydraulic cylinder and thus maintaining the cleaning effect. The flowing cleaning fluid can accelerate the cavitation effect and impact force generated by the ultrasonic waves, improve the cleaning efficiency, and remove oil and impurities from the surface of the hydraulic cylinder more quickly. Thus, the cooperation between the cover plate 30 and the limiting plate frame 40 achieves a better cleaning effect.

[0060] like Figure 2As shown, in some embodiments, the second vibrating plate 2b is set as a column with a cross-shaped cross section. Ultrasonic transducers 21 are provided inside the four sides of the second vibrating plate 2b, which can emit ultrasonic waves perpendicular to the axis of the hydraulic cylinder. The second vibrating plate 2b is placed in the middle of the housing 10, and the spacing between it and the housing 10 in the four directions is consistent, so the cleaning effect on the parts inside the housing 10 is roughly the same.

[0061] Furthermore, a cross-shaped first drain port 102 is provided on the first vibrating plate 2a corresponding to the second vibrating plate 2b. The cross-sectional dimension of the first drain port 102 is larger than that of the second vibrating plate 2b, so that the cleaning fluid in the cleaning chamber 101 can flow from the first drain port 102 into the circulating storage chamber 106.

[0062] To ensure that the cleaning fluid can pass through the first drain port 102 and that the first vibrating plate 2a can support the second vibrating plate 2b, a supporting rib 2a1 is provided on the inner side of the first drain port 102, and the second vibrating plate 2b is fixed on the supporting rib 2a1. In this way, the structure between the first vibrating plate 2a and the second vibrating plate 2b is kept stable without hindering the cleaning fluid in the cleaning chamber 101 from entering the circulating storage chamber 106 for circulation.

[0063] Furthermore, in order to filter the cleaning fluid entering the circulating storage tank 106 and keep the circulating cleaning fluid in a clean state, a filter plate 60 is provided between the circulating storage tank 106 and the cleaning tank 101. The filter plate 60 is set parallel to the limiting plate frame 40 and is used to filter the cleaning fluid entering the circulating storage tank 106.

[0064] Furthermore, such as Figure 3 As shown, the upper side of the filter plate 60 is provided with a partition parallel to the limiting plate frame 40 (the partition is in... Figure 3 The partition is located between the detection channel 103 and the liquid distribution channel 105. The upper side of the partition is provided with a detection channel 103 that communicates with the first drain port 102. The liquid distribution channel 105 is provided between the partition and the filter plate 60. The partition and the housing 10 are provided with a second drain port 104 that communicates with the detection channel 103 and the liquid distribution channel 105. The detection channel 103 is provided with a turbidity meter 80 for detecting the turbidity of the cleaning liquid in the detection channel 103.

[0065] Thus, the cleaning fluid containing oil stains left from the first drain port 102 first passes through the detection channel 103, where the turbidity of the cleaning fluid is detected by the turbidity meter 80 to determine whether the hydraulic cylinder has been cleaned. The cleaning fluid after detection continues to enter the distribution channel 105 through the second drain port 104, and after being filtered by the filter plate 60, the filtered liquid enters the circulating storage tank 106 for recycling.

[0066] like Figure 4As shown, in some embodiments, the detection channel 103 is constructed in a funnel shape, and the turbidimeter 80 is arranged on both sides of the narrow channel in the middle of the funnel shape, which can improve the detection accuracy of the turbidimeter 80. In this embodiment, the ultrasonic power and frequency emitted by the first vibrating plate 2a and the second vibrating plate 2b can be adjusted according to the turbidity of the cleaning fluid detected by the turbidimeter 80 and the detected turbidity data, so as to achieve a high-efficiency cleaning effect.

[0067] Furthermore, the flow rate of the cleaning fluid driven by the circulating pump 70 can be adjusted based on the turbidity data of the cleaning fluid detected by the high turbidity meter 80. When the turbidity of the cleaning fluid is high, the flow rate of the cleaning fluid can be increased to accelerate the discharge of oil stains.

[0068] like Figure 5 As shown, the filter plate 60 includes a filter element 62 and a plurality of guide plates 61 disposed on the top of the filter element 62. The plurality of guide plates 61 are evenly distributed along the length direction of the second drain port 104 and are used to evenly guide the cleaning fluid entering the second drain port 104 into the liquid distribution channel 105. This can prevent oil stains from accumulating in a local area of ​​the filter element 62, and can make the oil stains more evenly distributed on the filter element 62, thus extending the service life of the filter element 62.

[0069] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0070] Although embodiments have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

[0071] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. A hydraulic cylinder cleaning device, characterized in that, include: The casing (10) is a hollow cylinder with a cleaning chamber (101) at the upper end and a circulating liquid storage chamber (106) at the lower end. A vibrating plate (20) is disposed inside the cleaning chamber (101) and electrically connected to an external ultrasonic generator; The limiting plate frame (40) is set inside the cleaning chamber (101) and enables multiple sets of hydraulic cylinders to stand vertically in parallel inside the cleaning chamber (101); The vibrating plate (20) includes a first vibrating plate (2a) horizontally arranged in the cleaning chamber (101) and a second vibrating plate (2b) perpendicular to the first vibrating plate (2a). The first vibrating plate (2a) and the second vibrating plate (2b) are each provided with a plurality of ultrasonic transducers (21) electrically connected to the ultrasonic generator, so that the first vibrating plate (2a) can emit ultrasonic waves parallel to the axis of the hydraulic cylinder and the second vibrating plate (2b) can emit ultrasonic waves perpendicular to the axis of the hydraulic cylinder. The limiting plate frame (40) is provided with a plurality of holes (401) for placing the hydraulic cylinder. Along the axial direction of the hydraulic cylinder, the limiting plate frame (40) is provided with one or more holes (401) so that the hydraulic cylinder can be restricted in the holes (401) in a vertical position. The edge of the hole (401) is provided with a guide groove (402), and the guide groove (402) is arranged opposite to the direction of liquid flow. The guide groove (402) is constructed as an arc groove to guide the liquid flow perpendicular to the limiting plate frame (40) to the surface of the hydraulic cylinder. The limiting plate frame (40) is provided with a protruding guide block (41) between each of the holes (401). The protruding direction of the guide block (41) is opposite to the liquid flow direction. The guide block (41) is constructed as a hemisphere or a pyramid. The guide block (41) has a flow channel (410) at its center, which allows some of the liquid flow to pass through the limiting plate frame (40) via the flow channel (410). The flow channel (410) is parallel to or inclined to the axis of the hydraulic cylinder.

2. The hydraulic cylinder cleaning device according to claim 1, characterized in that: Also includes: Cover plate (30), located on top of the housing (10), and A circulation pump (70) is installed inside the circulation storage tank (106). The circulation pump (70) is used to draw the cleaning liquid in the circulation storage tank (106) and deliver it to the cleaning tank (101). The cover plate (30) has a liquid distribution chamber (300) inside. The bottom surface of the cover plate (30) has a plurality of evenly distributed drain holes (301) that communicate with the liquid distribution chamber (300). A hose (72) is provided between the cover plate (30) and the circulation pump (70) so that the circulation pump (70) draws the cleaning fluid in the circulation storage chamber (106) and delivers it to the liquid distribution chamber (300) through the hose (72). After being guided by the plurality of drain holes (301), the fluid enters the cleaning chamber (101) along the axis of the hydraulic cylinder.

3. The hydraulic cylinder cleaning device according to claim 1, characterized in that: A screen plate (50) parallel to the limiting plate frame (40) is provided above the first vibrating plate (2a). The screen plate (50) is located below the limiting plate frame (40), and the distance between the screen plate (50) and the first vibrating plate (2a) is greater than 10mm.

4. The hydraulic cylinder cleaning device according to any one of claims 1-3, characterized in that: The second vibrating plate (2b) is configured as a column with a cross-shaped cross section. The first vibrating plate (2a) has a cross-shaped first drain port (102) corresponding to the second vibrating plate (2b). The cross-sectional dimension of the first drain port (102) is larger than that of the second vibrating plate (2b), so that the cleaning liquid in the cleaning chamber (101) can flow into the circulating storage chamber (106) from the first drain port (102). The first drain port (102) is provided with a support rib (2a1) on its inner side, and the second vibration plate (2b) is fixed on the support rib (2a1).

5. The hydraulic cylinder cleaning device according to claim 4, characterized in that: A filter plate (60) is provided between the circulating liquid storage tank (106) and the cleaning tank (101). The filter plate (60) is arranged parallel to the limiting plate frame (40) and is used to filter the cleaning liquid entering the circulating liquid storage tank (106).

6. The hydraulic cylinder cleaning device according to claim 5, characterized in that: The filter plate (60) has a partition plate parallel to the limiting plate frame (40) on its upper side. The upper side of the partition plate has a detection channel (103) communicating with the first drain port (102). A liquid distribution channel (105) is provided between the partition plate and the filter plate (60). A second drain port (104) is provided between the partition plate and the housing (10) for communicating with the detection channel (103) and the liquid distribution channel (105). The detection channel (103) is constructed in the shape of a funnel, and a turbidimeter (80) is provided in the detection channel (103) for detecting the turbidity of the cleaning liquid in the detection channel (103).

7. The hydraulic cylinder cleaning device according to claim 6, characterized in that: The filter plate (60) includes a filter element (62) and a plurality of guide plates (61) disposed on the top of the filter element (62). The plurality of guide plates (61) are evenly distributed along the length direction of the second drain port (104) and are used to guide the cleaning liquid entering the second drain port (104) evenly into the liquid distribution channel (105).

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