Water jet polishing medium conveying device and water jet polishing equipment

Abstract

The utility model discloses a water jet polishing medium conveying device and water jet polishing equipment, and the water jet polishing medium conveying device comprises a storage bin which is used for storing a polishing medium containing abrasive particles and is provided with a discharge channel; one end of the feeding pipe is communicated with the discharging channel, the other end of the feeding pipe is used for being connected with a water jet spray gun, and the feeding pipe can be elastically deformed; and the extrusion mechanism is arranged on the side of the feeding pipe, and the pipe pressing mechanism is used for extruding the feeding pipe so as to drive the polishing medium in the feeding pipe to flow towards the water jet spray gun. The water jet polishing medium conveying device can replace a centrifugal pump and is used for conveying polishing media containing large-particle-size abrasive particles, and the problem that the conveying device cannot work normally due to conveying of the centrifugal pump is solved.

Description

Technical Field

[0001] The utility model relates to the field of workpiece surface polishing, in particular to a water jet polishing medium conveying device and water jet polishing equipment. Background Art

[0002] Water jet polishing is a polishing process that uses a polishing medium containing abrasive particles ejected at high speed from a small nozzle hole to act on the surface of the workpiece. The surface roughness of the workpiece is quantitatively corrected by controlling process parameters such as the pressure, angle and injection time of the polishing medium.

[0003] At present, polishing media are usually transported by centrifugal pumps. Specifically, the polishing media often transported by centrifugal pumps contain small-particle abrasive particles. However, when the polishing media transported contain large-particle abrasive particles (such as 1mm-4mm), the large-particle abrasive particles can easily cause the impeller of the centrifugal pump to get stuck and cause wear on components such as the blades, resulting in the centrifugal pump not being able to work normally and affecting the transportation efficiency. Utility Model Content

[0004] The main purpose of the utility model is to propose a water jet polishing medium conveying device, which aims to solve the technical problem that when polishing media containing large-particle abrasive particles are currently conveyed through a centrifugal pump, the large-particle abrasive particles easily cause the impeller of the centrifugal pump to get stuck and cause wear on components such as the blades, resulting in the centrifugal pump not being able to work normally and affecting the conveying efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides a water jet polishing medium conveying device, which includes:

[0006] A storage bin, the storage bin is used to store abrasive particles, and the storage bin is provided with a discharge channel;

[0007] A feeding pipe, one end of which is connected to the discharge channel and the other end of which is used to connect to the water jet spray gun, and the feeding pipe is elastically deformable;

[0008] An extrusion mechanism is provided beside the feeding pipe and is used for squeezing the feeding pipe to drive the abrasive particles in the feeding pipe to flow toward the water jet spray gun.

[0009] In some embodiments, the squeezing mechanism comprises:

[0010] Fixed seat;

[0011] A cam assembly, wherein the cam assembly is spaced apart on one side of the fixing seat, and a portion of the feeding tube is passed through the space between the cam assembly and the fixing seat;

[0012] A driving assembly is connected to the cam assembly in a transmission manner, and is used to drive the cam assembly to rotate so as to squeeze the portion of the feeding tube that passes through the space between the cam assembly and the fixing seat.

[0013] In some embodiments, an arc-shaped guide surface is formed on the side of the fixed seat facing the cam assembly, and a portion of the feed tube is bent along the arc-shaped guide surface. The cam assembly is spaced apart from the arc-shaped guide surface and enclosed with the arc-shaped guide surface to form the spacing space. The cam assembly is used to press the portion of the feed tube that passes through the spacing space between the cam assembly and the fixed seat against the arc-shaped guide surface.

[0014] In some embodiments, the cam assembly comprises:

[0015] A roller, the roller being in driving connection with the driving assembly;

[0016] A plurality of pressure rollers are arranged in sequence along the circumference of the roller and connected to the roller. Each of the pressure rollers protrudes from the roller and is used to squeeze the feed tube passing through the space between the cam assembly and the fixed seat.

[0017] In some embodiments, each of the pressure rollers is rotatably disposed on the roller wheel; and / or,

[0018] The distance between any two adjacent pressing rollers among the plurality of pressing rollers is equal.

[0019] In some embodiments, there are multiple feed tubes, and the multiple feed tubes are arranged side by side along the axial direction of the cam assembly.

[0020] In some embodiments, the discharge channel is located at the bottom of the storage bin or at the bottom end of the side of the storage bin, and the extrusion mechanism is located below the storage bin.

[0021] The utility model also proposes a water jet polishing device, which includes a water jet spray gun, a pressurizing device and a water jet polishing medium conveying device as described above, wherein the feeding pipe is connected to the water jet spray gun and is used to convey the polishing medium to the water jet spray gun; the pressurizing device is connected to the water jet spray gun and is used to provide injection pressure to the water jet spray gun so that the water jet spray gun sprays the polishing medium.

[0022] In some embodiments, the water jet spray gun is formed with an inner cavity and a feed port, a spray port, and a medium inlet connected to the inner cavity;

[0023] The feeding pipe is in communication with the feeding port and is used for feeding the polishing medium into the inner cavity;

[0024] The pressurizing device is communicated with the medium inlet and is used to deliver pressurized medium to the inner cavity, so that the polishing medium in the inner cavity is ejected from the ejection port.

[0025] In some embodiments, the medium inlet and the injection port are located on the central axis of the inner cavity, and the feed port is arranged along the tangential direction of the inner cavity.

[0026] During operation of the water jet polishing medium conveying device of the present invention, the polishing medium containing abrasive particles in the storage bin flows into the feed pipe through the discharge channel. At the same time, the extrusion mechanism squeezes the feed pipe to drive the polishing medium in the feed pipe to flow toward the water jet spray gun, thereby conveying the polishing medium to the water jet spray gun. Since the feed pipe is elastically deformable, it returns to its original shape after being released by the extrusion mechanism, re-absorbs the polishing medium, and enters the next extrusion cycle. The abrasive particles in the polishing medium can be large-sized abrasive particles. Large-sized abrasive particles will not affect the components of the conveying device during the conveying process, and normal conveying can be achieved, ensuring conveying efficiency. That is, the water jet polishing medium conveying device of the present invention can replace a centrifugal pump to convey polishing media containing large-sized abrasive particles, and the problem of the conveying device not being able to work normally due to centrifugal pump conveying will not occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a water jet polishing medium delivery device in one embodiment of the present utility model;

[0028] Figure 2 This is a schematic diagram of a portion of the structure of a water jet polishing device in one embodiment of the present utility model;

[0029] Figure 3 This is a schematic structural diagram of a water jet spray gun of a water jet polishing device in one embodiment of the present utility model. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the schemes in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0033] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0034] The utility model embodiment provides a water jet polishing medium delivery device, referring to Figure 1 The water jet abrasive particle conveying device includes: a storage bin 100, a feeding pipe 200 and an extrusion mechanism 300. The storage bin 100 is used to store polishing media containing abrasive particles. The storage bin 100 is provided with a discharge channel 110; one end of the feeding pipe 200 is connected to the discharge channel 110, and the other end is used to connect to the water jet spray gun 400. The feeding pipe 200 can be elastically deformed; the extrusion mechanism 300 is provided on the side of the feeding pipe 200, and the extrusion mechanism 300 is used to extrude the feeding pipe 200 to drive the polishing media in the feeding pipe 200 to flow toward the water jet spray gun 400.

[0035] The water jet polishing medium delivery device of this embodiment is used to deliver polishing medium containing abrasive particles. The polishing medium can be in a paste, viscous form, or other form. The abrasive particles can be polymer abrasive particles, and the abrasive particles can be large (1 mm to 4 mm) or small, without limitation. Furthermore, in addition to the abrasive particles, the polishing medium may also contain other media such as water or cutting fluid.

[0036] like Figure 1As shown, the water jet polishing medium conveying device is mainly composed of a storage bin 100, a feeding pipe 200 and an extrusion mechanism 300. The function of the storage bin 100 is to store polishing media containing abrasive particles. The appearance shape of the storage bin 100 can be cylindrical or rectangular, and this embodiment does not limit this. The storage bin 100 is provided with a discharge channel 110, which is connected to the storage cavity in the storage bin 100 for the outflow of polishing media. Optionally, the storage bin 100 is provided with an opening and a bin cover for sealing the opening, and polishing media can be added to the storage bin 100 through the opening.

[0037] The feed tube 200 is used to transport polishing media containing abrasive particles. Specifically, one end of the feed tube 200 is the feed end, connected to the discharge channel 110 of the storage bin 100. The other end is the discharge end, connected to the water jet spray gun 400. In other words, the polishing media containing abrasive particles in the storage bin 100 can be transported to the water jet spray gun 400 via the feed tube 200. The feed tube 200 is elastically deformable. Elastic deformation refers to the change in relative position of points on a solid due to an external force. When the external force is removed, the solid returns to its original state.

[0038] The extrusion mechanism 300 functions to squeeze the feed tube 200, compressing the interior of the feed tube 200 and thereby driving the polishing medium in the feed tube 200 toward the water jet spray gun 400, thereby transporting the polishing medium. Specifically, the extrusion mechanism 300 is disposed adjacent to the feed tube 200 and can have various structural configurations. For example, the extrusion mechanism 300 can include a drive member and a clamping member connected to the drive member. During operation, the extrusion mechanism 300 first clamps the feed tube 200 using its dual clamping arms. The drive member then drives the clamping member to move along the feed tube 200. During this movement, the clamping member squeezes the feed tube 200, thereby driving the polishing medium in the feed tube 200 toward the water jet spray gun 400. The drive member can be a linear cylinder, a linear drive module, or other configuration, and this embodiment is not intended to limit this. Furthermore, the extrusion mechanism 300 can also have other structural configurations, which will be further described in subsequent embodiments.

[0039] During the operation of the water jet polishing medium conveying device, the polishing medium containing abrasive particles in the storage bin 100 flows into the feed pipe 200 through the discharge channel 110. At the same time, the extrusion mechanism 300 squeezes the feed pipe 200 to drive the polishing medium in the feed pipe 200 to flow toward the water jet spray gun 400, and then conveys the polishing medium to the water jet spray gun 400. Since the feed pipe 200 is elastically deformable, it returns to its original shape after being released by the extrusion mechanism 300, and re-absorbs the polishing medium to enter the next extrusion cycle.

[0040] The abrasive particles in the polishing medium can be large-sized abrasive particles. These large-sized abrasive particles do not affect the components of the conveying device during conveying, enabling normal conveying and ensuring conveying efficiency. In other words, the water jet polishing medium conveying device of the present invention can replace a centrifugal pump to convey polishing media containing large-sized abrasive particles, without the problem of centrifugal pump conveying causing the conveying device to malfunction.

[0041] In some embodiments, reference Figure 1 The extrusion mechanism 300 includes: a fixed base 310, a cam assembly 320 and a driving assembly. The cam assembly 320 is spaced apart on one side of the fixed base 310, and a part of the feeding tube 200 is passed through the interval space between the cam assembly 320 and the fixed base 310; the driving assembly is transmission-connected to the cam assembly 320, and the driving assembly is used to drive the cam assembly 320 to rotate so as to extrude the part of the feeding tube 200 that passes through the interval space between the cam assembly 320 and the fixed base 310.

[0042] The function of the fixed seat 310 is to provide support for the feed tube 200 during the extrusion process of the feed tube 200. The cam assembly 320 may include a cam, which is a component with a curved profile and performs constant speed rotational motion. When the cam rotates, its protruding portion periodically contacts and squeezes the feed tube 200. In addition, the cam assembly 320 may also adopt other structural forms, which are not limited by this embodiment. The drive assembly may include a drive motor, the output shaft of the drive motor is connected to the cam assembly 320, and the output shaft of the drive motor rotates to output driving power, thereby driving the cam assembly 320 to rotate. A transmission assembly may be provided between the output shaft of the drive motor and the cam assembly 320, with the power input end of the transmission assembly connected to the output shaft of the drive motor, and the power output end of the transmission assembly connected to the cam assembly 320. The transmission assembly may be a gear assembly, a pulley assembly, etc., which are not limited by this embodiment.

[0043] During the operation of the extrusion mechanism 300, the driving assembly drives the cam assembly 320 to rotate. The cam assembly 320 contacts the feed pipe 200 and moves along the portion of the feed pipe 200 that passes through the space between the cam assembly 320 and the fixed seat 310 during the rotation, and then cooperates with the fixed seat 310 to form an extrusion effect on the portion of the feed pipe 200 that passes through the space between the cam assembly 320 and the fixed seat 310, so that the polishing medium in the space at the portion of the feed pipe 200 that passes through the space between the cam assembly 320 and the fixed seat 310 flows forward toward the water jet spray gun 400. At the same time, the polishing medium behind immediately flows into the space at the portion of the feed pipe 200 that passes through the space between the cam assembly 320 and the fixed seat 310. In this way, the rotation of the cam assembly 320 cyclically squeezes the portion of the feed pipe 200 that passes through the space between the cam assembly 320 and the fixed seat 310, so that the polishing medium in the feed pipe 200 continues to flow, thereby realizing the transportation of the polishing medium.

[0044] In some embodiments, reference Figure 1 A curved guide surface 311 is formed on the side of the fixed seat 310 facing the cam assembly 320, and a portion of the feed tube 200 is bent along the curved guide surface 311. The cam assembly 320 is spaced apart from the curved guide surface 311 and enclosed with the curved guide surface 311 to form a spacing space. The cam assembly 320 is used to press the portion of the feed tube 200 that passes through the spacing space between the cam assembly 320 and the fixed seat 310 against the curved guide surface 311.

[0045] Specifically, based on the outer contour of the cam assembly 320, a curved guide surface 311 is formed on the side of the fixed seat 310 facing the cam assembly 320. The space between the curved guide surface 311 and the cam assembly 320 is adapted to the feed tube 200, and the local bend of the feed tube 200 is located within this space. During rotation, the cam assembly 320 rotates along the portion of the feed tube 200 that passes through the space, pressing it against the curved guide surface 311 of the fixed seat 310. Furthermore, while rotating, it cooperates with the curved guide surface 311 of the fixed seat 310 to squeeze the portion of the feed tube 200 that passes through the space, driving the polishing medium in the feed tube 200 toward the water jet spray gun 400. In this embodiment, the feed tube 200 is partially bent to conform to the arc-shaped motion path of the cam assembly 320. Compared with a straight tube, the cam assembly 320 has a longer squeezing effect on the feed tube 200 during rotation, so that the polishing medium in the feed tube 200 is driven by more sufficient power and the conveying effect is better.

[0046] In some embodiments, reference Figure 1The cam assembly 320 includes: a roller 321 and a plurality of pressure rollers 322, the roller 321 is in transmission connection with the driving assembly; the plurality of pressure rollers 322 are arranged in sequence along the circumference of the roller 321 and are connected to the roller 321, each pressure roller 322 protrudes from the roller 321, and is used to squeeze the feeding tube 200 through the space between the cam assembly 320 and the fixed seat 310. Specifically, the drive assembly drives the roller 321 of the cam assembly 320 to rotate, and the multiple pressure rollers 322 on the roller 321 rotate with it, sequentially contacting the feed tube 200 and moving along the portion of the feed tube 200 that passes through the space between the cam assembly 320 and the fixed seat 310 during the rotation. Then, they cooperate with the fixed seat 310 to form a squeezing effect on the portion of the feed tube 200 that passes through the space between the cam assembly 320 and the fixed seat 310, causing the polishing medium in the feed tube 200 to continuously flow toward the water jet spray gun 400, thereby achieving the conveyance of the polishing medium. The number of pressure rollers 322 provided can be set according to actual conditions, for example, three, four, or five pressure rollers 322 can be provided.

[0047] In some embodiments, each pressing roller 322 is rotatably disposed on the roller 321; and / or,

[0048] The distance between any two adjacent pressing rollers 322 among the plurality of pressing rollers 322 is equal.

[0049] In this embodiment, each pressure roller 322 is optionally rotatably mounted on the roller wheel 321. When the cam assembly 320 squeezes the feed tube 200, the pressure roller 322 contacts the feed tube 200 and, during rotation, rolls along a portion of the feed tube 200 extending through the space between the cam assembly 320 and the fixed seat 310. This creates rolling friction with the feed tube 200, resulting in low friction and reduced wear on the feed tube 200, thereby extending the service life of the feed tube 200. Furthermore, / or, optionally, the spacing between any two adjacent pressure rollers 322 in the plurality of pressure rollers 322 is equal. For example, if three pressure rollers 322 are provided, the spacing between any two of the three pressure rollers 322 is equal. By using the plurality of equally spaced pressure rollers 322, the cam assembly 320 squeezes the feed tube 200 at equal intervals during rotation, thereby achieving uniform delivery of the polishing medium in the feed tube 200.

[0050] In some embodiments, there are multiple feed pipes 200, and the multiple feed pipes 200 are arranged side by side along the axial direction of the cam assembly 320. In this embodiment, multiple feed pipes 200 are provided, and the multiple feed pipes 200 are connected to the storage bin 100. Each feed pipe 200 is connected to a water jet spray gun 400, and can be used to guide the polishing medium to multiple water jet spray guns 400. In addition, during operation of the water jet polishing medium delivery device, the drive assembly of the extrusion mechanism 300 drives the cam assembly 320 to rotate, causing the cam assembly 320 to simultaneously contact and squeeze the multiple feed pipes 200, causing the polishing medium in the multiple feed pipes 200 to flow toward their respective water jet spray guns 400. This achieves a single power source (i.e., the extrusion mechanism 300) providing driving power for the polishing medium delivery of multiple water jet spray guns 400, saving costs.

[0051] In some embodiments, reference Figure 1 , the discharge channel 110 is located at the bottom of the storage bin 100 or at the bottom end of the side of the storage bin 100, and the extrusion mechanism 300 is located below the storage bin 100. In this embodiment, the discharge channel 110 can be arranged at the bottom of the storage bin 100. For example, the bottom of the storage bin 100 is funnel-shaped, and the discharge channel 110 is arranged at the center of the bottom of the storage bin 100. Alternatively, the discharge channel 110 can also be arranged at the bottom end of the side of the storage bin 100, which can be set according to actual conditions. The feeding pipe 200 is connected to the discharge channel 110 at the bottom of the storage bin 100 or the bottom end of the side of the storage bin 100, and is arranged downward. The extrusion mechanism 300 is correspondingly located below the storage bin 100 and acts on the feeding pipe 200. Through this structural setting and position layout, the polishing medium in the storage bin 100 can flow downward under the action of its own gravity, enter the feeding pipe 200, and be guided under the extrusion action of the extrusion mechanism 300, which can further improve the conveying effect of the polishing medium.

[0052] The present invention also provides a water jet polishing device, referring to Figure 1 and Figure 2 The water jet polishing apparatus includes a water jet spray gun 400, a pressurizing device, and a water jet polishing medium delivery device as described in the aforementioned embodiments. A feed pipe 200 is connected to the water jet spray gun 400 for delivering polishing medium to the water jet spray gun 400. The pressurizing device is connected to the water jet spray gun 400 for providing spray pressure to the water jet spray gun 400 so that the water jet spray gun 400 sprays the polishing medium. The specific structure of the water jet polishing medium delivery device is similar to that of the aforementioned embodiments. Since the present water jet polishing apparatus utilizes all the technical solutions of all the aforementioned embodiments, it at least has all the technical effects brought about by the technical solutions of the aforementioned embodiments, and therefore will not be described in detail here.

[0053] In some embodiments, reference Figure 2 and Figure 3 The water jet spray gun 400 is formed with an inner cavity 410 and a feed port 411, a spray port 412, and a medium inlet 413 communicating with the inner cavity;

[0054] The feeding pipe 200 is in communication with the feeding port 411 and is used to feed the polishing medium into the inner cavity 410;

[0055] The pressurizing device is in communication with the medium inlet 413 and is used to deliver pressurized medium to the inner cavity 410 so that the polishing medium in the inner cavity 410 is ejected from the ejection port 412 .

[0056] When the water jet polishing equipment is in operation, the water jet polishing medium delivery device delivers the polishing medium from the feed port 411 of the water jet spray gun 400 into its inner cavity 410 via the feed pipe 200. Simultaneously, the pressurizing device delivers the pressurized medium from the medium inlet 413 of the water jet spray gun 400 into its inner cavity 410. Under the high pressure of the input pressurized medium, the polishing medium in the inner cavity 410 of the water jet spray gun 400 is ejected from the ejection port 412 and acts on the workpiece surface to perform water jet polishing. The pressurized medium involved can be gas or liquid, without limitation.

[0057] In some embodiments, reference Figure 2 and Figure 3 The medium inlet 413 and the injection port 412 are located on the central axis of the inner cavity 410, and the feed port 411 is arranged along the tangential direction of the inner cavity 410. Specifically, the medium inlet 413 and the injection port 412 are arranged opposite to each other on the central axis of the inner cavity 410, and the pressurized medium enters the inner cavity 410 through the feed port 411 and is ejected toward the injection port 412. In particular, since the feed port 411 is arranged along the tangential direction of the inner cavity 410, the polishing medium enters through the medium inlet 413 and moves along the inner wall of the inner cavity 410, combines with the pressurized medium to form a vortex in the inner cavity 410, and is finally ejected from the injection port 412. After being ejected onto the surface of the workpiece, the polishing medium forms a smooth relative friction motion with the workpiece, thereby reducing the surface roughness of the workpiece and achieving polishing of the workpiece surface.

[0058] The above description is only part or preferred embodiments of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A water jet polishing medium delivery device, characterized in that: include: A storage bin, the storage bin is used to store polishing media containing abrasive particles, and the storage bin is provided with a discharge channel; A feeding pipe, one end of which is connected to the discharge channel and the other end of which is used to connect to the water jet spray gun, and the feeding pipe is elastically deformable; An extrusion mechanism is provided beside the feed pipe and is used for squeezing the feed pipe to drive the polishing medium in the feed pipe to flow toward the water jet spray gun.

2. The water jet polishing medium delivery device according to claim 1, characterized in that: The extrusion mechanism comprises: Fixed seat; A cam assembly, wherein the cam assembly is spaced apart on one side of the fixing seat, and a portion of the feeding tube is passed through the space between the cam assembly and the fixing seat; A driving assembly is connected to the cam assembly in a transmission manner, and is used to drive the cam assembly to rotate so as to squeeze the portion of the feeding tube that passes through the space between the cam assembly and the fixing seat.

3. The water jet polishing medium delivery device according to claim 2, characterized in that: An arc-shaped guide surface is formed on the side of the fixed seat facing the cam assembly, and a portion of the feed tube is bent along the arc-shaped guide surface. The cam assembly is spaced apart from the arc-shaped guide surface and enclosed with the arc-shaped guide surface to form the spacing space. The cam assembly is used to press the portion of the feed tube that passes through the spacing space between the cam assembly and the fixed seat against the arc-shaped guide surface.

4. The water jet polishing medium delivery device according to claim 2 or 3, characterized in that: The cam assembly comprises: A roller, the roller being in driving connection with the driving assembly; A plurality of pressure rollers are arranged in sequence along the circumference of the roller and connected to the roller. Each of the pressure rollers protrudes from the roller and is used to squeeze the feed tube passing through the space between the cam assembly and the fixed seat.

5. The water jet polishing medium delivery device according to claim 4, characterized in that: Each of the pressing rollers is rotatably arranged on the roller wheel; and / or, The distance between any two adjacent pressing rollers among the plurality of pressing rollers is equal.

6. The water jet polishing medium delivery device according to claim 2 or 3, characterized in that: There are multiple feeding pipes, and the multiple feeding pipes are arranged side by side along the axial direction of the cam assembly.

7. The water jet polishing medium delivery device according to any one of claims 1 to 3, characterized in that: The discharge channel is located at the bottom of the storage bin or at the bottom end of the side of the storage bin, and the extrusion mechanism is located below the storage bin.

8. A water jet polishing device, characterized in that: It comprises a water jet spray gun, a pressurizing device and a water jet polishing medium conveying device as described in any one of claims 1 to 7, wherein the feed pipe is connected to the water jet spray gun and is used to convey the polishing medium to the water jet spray gun; the pressurizing device is connected to the water jet spray gun and is used to provide injection pressure to the water jet spray gun so that the water jet spray gun sprays the polishing medium.

9. The water jet polishing equipment according to claim 8, characterized in that: The water jet spray gun is formed with an inner cavity and a feed port, a spray port, and a medium inlet communicated with the inner cavity; The feeding pipe is in communication with the feeding port and is used for feeding the polishing medium into the inner cavity; The pressurizing device is communicated with the medium inlet and is used to deliver pressurized medium to the inner cavity, so that the polishing medium in the inner cavity is ejected from the ejection port.

10. The water jet polishing equipment according to claim 9, characterized in that: The medium inlet and the injection port are located on the central axis of the inner cavity, and the feed port is arranged along the tangential direction of the inner cavity.

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