Spiral sand feeding device and water jet cutting tool bit thereof
By using a spiral sand inlet device in the waterjet cutting system, the abrasive is introduced into the axial channel, so that the abrasive has a consistent speed and direction when mixed with water, the problems of low abrasive mixing rate and eccentricity are solved, and the cutting ability and efficiency are significantly improved.
Patent Information
- Application Number
- CN202421931949.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-09
AI Technical Summary
In the existing waterjet cutting technology, the mixing rate of abrasive and water is low, the speed consistency of the abrasive is poor, resulting in a low cutting ability, and the abrasive enters the mixing chamber eccentricly, which easily leads to equipment failure.
A spiral sand inlet device is used to guide the abrasive into the axial channel, so that the abrasive has a consistent speed and direction when mixing with water, improve the abrasive eccentricity problem, and improve the abrasive mixing rate.
By improving the mixing rate and consistency of the abrasive, the cutting ability of the abrasive jet is enhanced, the failure rate of the waterjet is reduced, and the cutting efficiency is greatly improved.
Smart Images
Figure CN223029445U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water jet cutting, in particular to a spiral sand feeding device and a water jet cutting tool head thereof. Background Technique
[0002] Water jet cutting, also known as water cutting, is a high-pressure water jet cutting technology. It uses the kinetic energy of a high-pressure water jet to carry tiny free abrasives and flow through a mixing tube at an extremely high speed, forming a high-energy beam that is sprayed onto the surface of the workpiece for erosion, impact, and destruction, thereby achieving the cutting and removal of the workpiece material.
[0003] Water jet cutting requires the mixing of water and sand. Currently, during the sand mixing process, the abrasive is sucked into the abrasive mixing chamber of the mixing tube by the jet negative pressure. Since the initial velocity of the abrasive when entering the mixing chamber does not match the velocity of the water jet, the resulting abrasive jet has inconsistent velocities of water and abrasive inside, leading to low abrasive utilization rate. In addition, after the abrasive is sucked into the abrasive mixing chamber, under the action of negative pressure, the abrasive enters from one side and becomes eccentric. The abrasive cannot directly reach the center point of the outlet, and part of the abrasive remains in the mixing chamber, resulting in a low abrasive mixing rate. The proportion of abrasive in the formed abrasive jet is small, and it is easy for the equipment to malfunction due to the accumulation of abrasive in the mixing chamber.
[0004] Due to problems such as a low mixing rate of abrasive and water and poor velocity consistency between water and abrasive, the cutting ability of water jet cutting is low. Therefore, how to improve the cutting ability of water jet cutting is a technical problem faced by those skilled in the art. Content of the Utility Model
[0005] The purpose of the utility model is to provide a spiral sand feeding device and a water jet cutting tool head thereof to solve the problems existing in the above-mentioned prior art. The spiral channel is used to guide the abrasive into the axial channel, so that the abrasive has a consistent velocity and direction when mixing with water, which can improve the problem of abrasive eccentricity, increase the abrasive mixing rate, and further enhance the cutting ability of the abrasive jet.
[0006] To achieve the above purpose, the utility model provides the following scheme:
[0007] The utility model provides a spiral sand feeding device, which includes a cylindrical body, an axial channel and a spiral channel opened on the cylindrical body. The axial channel penetrates the cylindrical body along the axis. The spiral channel is opened on the cylindrical wall of the cylindrical body. The spiral channel spirally surrounds the axial channel. The inlet of the spiral channel is used to communicate with the sand feeding channel, and the outlet of the spiral channel communicates with the axial channel.
[0008] Preferably, the axial channel is a conical channel. The large-diameter end of the conical channel is the inlet end, and the small-diameter end of the conical channel is the outlet end.
[0009] Preferably, the inlet of the spiral channel is located on the end face of the inlet end.
[0010] Preferably, the outlet of the spiral channel communicates with the axial channel in the radial direction of the outlet end.
[0011] Preferably, the spiral channel is formed inside the cylinder wall and is not communicated with the axial channel.
[0012] Preferably, positioning holes are provided on the outer diameter side of the cylindrical body.
[0013] The present utility model also provides a water jet cutting tool head, which includes a manifold, a sand mixing pipe, and the spiral sand feeding device as described above. The spiral sand feeding device is located between the manifold and the sand mixing pipe. The inlet and outlet of the axial channel are respectively communicated with the manifold and the sand mixing pipe, and the inlet of the spiral channel is communicated with the sand feeding channel.
[0014] Preferably, it further includes a nozzle body, which is provided with an axially penetrating installation through hole and the sand feeding channel that radially communicates with the installation through hole. One end of the installation through hole is connected to the manifold, the other end of the installation through hole is connected to the sand mixing pipe, and the spiral sand feeding device is arranged in the middle of the installation through hole.
[0015] Preferably, it further includes a water nozzle, which is located between the manifold and the spiral sand feeding device. The inner diameter of the water nozzle is smaller than the inner diameter of the manifold. There is a spacing for water and abrasive to flow through between the water nozzle and the spiral sand feeding device. A conical mixing cavity is provided at one end of the sand mixing pipe close to the spiral sand feeding device.
[0016] Preferably, it further includes a fastening nut. A clamping ring is sleeved at the position where the sand mixing pipe passes through the nozzle body. The fastening nut presses the clamping ring and is threadedly connected to the nozzle body.
[0017] The present utility model has achieved the following technical effects compared with the prior art:
[0018] The present utility model uses a spiral channel to introduce abrasive into the axial channel and guide the movement direction of the abrasive during feeding, so that when the abrasive and water are mixed in the axial channel, they have the same speed and direction, which can improve the problem of abrasive eccentricity, increase the abrasive mixing rate, and further enhance the cutting ability of the abrasive jet.
[0019] The present utility model can improve the problem that the abrasive eccentrically enters the mixing cavity under the action of negative pressure, resulting in abrasive accumulation, make the abrasive mixing more sufficient, enhance the cutting ability of the abrasive jet, reduce the failure rate of the water jet, and greatly improve the cutting efficiency. Description of the Drawings
[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0021] Figure 1 It is a sectional view of the water jet cutting tool head of the present invention;
[0022] Figure 2 It is a sectional view of the spiral abrasive feeding device of the present invention;
[0023] Among them, 1, manifold; 2, water nozzle; 3, nozzle body; 31, abrasive inlet channel; 4, fastening nut; 5, clamping ring; 6, sand mixing pipe; 7, spiral abrasive feeding device; 71, cylindrical body; 72, axial channel; 73, spiral channel; 74, positioning hole. Detailed implementation manners
[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0025] The purpose of the present invention is to provide a spiral abrasive feeding device and its water jet cutting tool head to solve the problems existing in the prior art. By using the spiral channel to introduce the abrasive into the axial channel, the abrasive has a consistent speed and direction when mixing with water, which can improve the problem of abrasive eccentricity, increase the abrasive mixing rate, and further enhance the cutting ability of the abrasive jet.
[0026] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.
[0027] As Figure 2As shown in the figure, the present utility model provides a spiral abrasive feeding device, which is mainly used for a water jet cutting tool head to guide the trajectory of abrasives, improve the mixing effect of abrasives and water, and ultimately enhance the cutting ability. The spiral abrasive feeding device 7 includes a cylindrical body 71, an axial channel 72 and a spiral channel 73 opened on the cylindrical body 71. The outer shape of the cylindrical body 71 can be cylindrical. The axial channel 72 penetrates the cylindrical body 71 axially, and the axial channel 72 can be a circular hole or a tapered hole. The spiral channel 73 is opened on the cylindrical wall of the cylindrical body 71. The spiral channel 73 spirally surrounds the axial channel 72. The trajectory of the spiral channel 73 can be inside the cylindrical wall or expose to the inner diameter side of the cylindrical wall. At this time, the spiral channel 73 is a spiral groove opened on the inner wall of the cylindrical body 71. The inlet of the spiral channel 73 is used to communicate with the abrasive feeding channel 31, that is, abrasives are supplied to the spiral channel 73 through the abrasive feeding channel 31. The outlet of the spiral channel 73 communicates with the axial channel 72. The abrasives after being guided by the spiral channel 73 are mixed with the water passing through the axial channel 72 inside the axial channel 72 or at the outlet of the axial channel 72. At this time, due to the guiding effect of the spiral channel 73, the abrasives have the same flow direction as the water, and driven by the water flow, the abrasives can have the same speed as the water flow.
[0028] The present utility model uses the spiral channel 73 to introduce abrasives into the axial channel 72 and guide the movement direction of the abrasives during feeding, so that the abrasives and water have the same speed and direction when mixed in the axial channel 72, which can improve the problem of abrasive eccentricity, increase the abrasive mixing rate, and further enhance the cutting ability of the abrasive jet. The present utility model can improve the problem that abrasives enter the mixing chamber eccentrically under the action of negative pressure, resulting in abrasive accumulation, make the abrasive mixing more sufficient, enhance the cutting ability of the abrasive jet, reduce the failure rate of the water jet, and greatly improve the cutting efficiency.
[0029] Furthermore, the axial channel 72 can be designed as a tapered hole. At this time, the axial channel 72 is a tapered channel. The large-diameter end of the tapered channel is the inlet end, and the small-diameter end of the tapered channel is the outlet end. When the water flow enters from the inlet end and flows through the axial channel 72 to the outlet end, due to the gradually decreasing inner diameter of the axial channel 72, the water flow gradually converges to increase the flow speed and pressure, and thus can improve the ability to carry abrasives at the outlet end and eject the abrasives and water together.
[0030] The inlet of the spiral channel 73 can be opened on the radial direction of the cylindrical body 71 or on the end face of the cylindrical body 71. At this time, the inlet of the spiral channel 73 is located on the end face of the inlet end of the axial channel 72. When the water flow passes through the axial channel 72 and is discharged from its outlet end, a large negative pressure suction force will be generated at the inlet of the spiral channel 73. The generated negative pressure suction force can suck the abrasives into the spiral channel 73 and enable the abrasives entering the spiral channel 73 to obtain the flow speed. Finally, the abrasives and the water flow converge and mix and flow out at the outlet of the spiral channel 73.
[0031] The outlet of the spiral channel 73 can communicate with the axial channel 72 radially within the axial channel 72, but the outlet of the spiral channel 73 has the same orientation as the axial channel 72. That is to say, the outlet of the spiral channel 73 is not perpendicular to the axis of the axial channel 72, so as to keep the flow direction of the abrasive consistent with the flow direction of the water flow. When the axial channel 72 is a conical channel, by using the constriction effect formed by the smaller diameter of the outlet end of the axial channel 72, the outlet of the spiral channel 73 can be arranged at the outlet end or near the outlet end, which is more convenient for the water flow to carry the abrasive.
[0032] The trajectory of the spiral channel 73 can be opened inside the cylinder wall. At this time, the spiral channel 73 is not connected to the axial channel 72, and the inner wall of the axial channel 72 is smooth, which will not cause obstruction to the water flow.
[0033] Positioning holes 74 can be provided on the outer diameter side of the cylindrical body 71. The positioning holes 74 can be evenly distributed circumferentially, and the position of the spiral sand feeding device 7 can be defined by means of screws or the like.
[0034] As Figure 1 shown, the present utility model also provides a water jet cutting tool head, which includes a water collecting pipe 1, a sand mixing pipe 6, and the spiral sand feeding device 7 described above. The water collecting pipe 1 is used to connect to a water source and receive high-pressure water flow. The sand mixing pipe 6 is used to circulate the mixed flow of water and abrasive and eject the mixed flow for water jet cutting. The spiral sand feeding device 7 is located between the water collecting pipe 1 and the sand mixing pipe 6. The axial channel 72 opened in the spiral sand feeding device 7 has its inlet and outlet communicating with the water collecting pipe 1 and the sand mixing pipe 6 respectively, and the spiral channel 73 provided in the spiral sand feeding device 7 has its inlet communicating with the sand feeding channel 31. The spiral sand feeding device 7 is used to mix the water flow from the water collecting pipe 1 with the abrasive from the sand feeding channel 31.
[0035] It may further include a nozzle body 3. The nozzle body 3 is provided with an axially penetrating installation through hole and a sand feeding channel 31 radially communicating with the installation through hole. The nozzle body 3 is used to connect the water collecting pipe 1, the spiral sand feeding device 7, and the sand mixing pipe 6 into an integral structure. Specifically, one end of the installation through hole can be connected to the water collecting pipe 1 by means of threaded connection, and the other end of the installation through hole can be connected to the sand mixing pipe 6 by means of nut locking. The spiral sand feeding device 7 is arranged in the middle of the installation through hole.
[0036] It may further include a water nozzle 2, which is located between the manifold 1 and the spiral abrasive feeding device 7. The inner diameter of the water nozzle 2 is smaller than that of the manifold 1, and it can further increase the speed and pressure of the water flowing out of the manifold 1 and then spray it out. There is a spacing for water supply and abrasive flow between the water nozzle 2 and the spiral abrasive feeding device 7, so that the abrasive can smoothly enter the spiral channel 73. One end of the mixing sand pipe 6 close to the spiral abrasive feeding device 7 is provided with a conical mixing chamber. The mixed flow containing water and abrasive after being mixed by the spiral abrasive feeding device 7 is mixed again in the mixing chamber, and finally flows out through the internal channel of the mixing sand pipe 6.
[0037] It may further include a fastening nut 4. A clamping ring 5 is sleeved at the position where the mixing sand pipe 6 passes through the nozzle body 3. The clamping ring 5 can be made of flexible materials such as rubber. The fastening nut 4 has a stepped hole. The small hole end of the fastening nut 4 presses the clamping ring 5, and the large hole end of the fastening nut 4 is threadedly connected to the nozzle body 3, finally realizing the connection and fixation of the mixing sand pipe 6 and the nozzle body 3.
[0038] In the present utility model, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.
Claims
1. A spiral sand feeding device, characterized in that: It comprises a cylindrical body and an axial channel and a spiral channel provided on the cylindrical body, wherein the axial channel penetrates the cylindrical body axially, the spiral channel is provided on the cylinder wall of the cylindrical body, the spiral channel spirally surrounds the axial channel, the inlet of the spiral channel is used to connect to the sand feeding channel, and the outlet of the spiral channel connects to the axial channel.
2. The spiral sand feeding device according to claim 1, characterized in that: The axial channel is a tapered channel, the large diameter end of the tapered channel is an inlet end, and the small diameter end of the tapered channel is an outlet end.
3. The spiral sand feeding device according to claim 2, characterized in that: The inlet of the spiral channel is located at the end surface of the inlet end.
4. The spiral sand feeding device according to claim 2, characterized in that: The outlet of the spiral channel is communicated with the axial channel in the radial direction of the outlet end.
5. The spiral sand feeding device according to claim 1, characterized in that: The spiral channel is opened inside the cylinder wall, and the spiral channel is not connected with the axial channel.
6. The spiral sand feeding device according to claim 1, characterized in that: A positioning hole is arranged on the outer diameter side of the cylindrical body.
7. A water jet cutting head, characterized in that: It comprises a collecting pipe, a sand mixing pipe and a spiral sand feeding device as described in any one of claims 1 to 6, wherein the spiral sand feeding device is located between the collecting pipe and the sand mixing pipe, the inlet and outlet of the axial channel are respectively connected to the collecting pipe and the sand mixing pipe, and the inlet of the spiral channel is connected to the sand feeding channel.
8. The water jet cutting head according to claim 7, characterized in that: It also includes a nozzle body, which is provided with an axially penetrating mounting through hole and the sand feeding channel radially connected to the mounting through hole, one end of the mounting through hole is connected to the collecting pipe, and the other end of the mounting through hole is connected to the sand mixing pipe, and the spiral sand feeding device is arranged in the middle of the mounting through hole.
9. The water jet cutting head according to claim 8, characterized in that: It also includes a water nozzle, which is located between the collecting pipe and the spiral sand feeding device. The inner diameter of the water nozzle is smaller than the inner diameter of the collecting pipe. There is a distance between the water nozzle and the spiral sand feeding device for water supply and abrasive flow. A conical mixing chamber is provided at one end of the sand mixing pipe close to the spiral sand feeding device.
10. The water jet cutting head according to claim 8, characterized in that: It also includes a fastening nut. A clamp ring is sleeved on the position where the sand mixing pipe passes through the nozzle body. The fastening nut presses the clamp ring and is threadedly connected to the nozzle body.