Water jet scalpel nozzle and medical water jet scalpel

Abstract

The utility model relates to the technical field of physical cutting, and discloses a water jet scalpel spray head and a medical water jet scalpel. A jet flow channel is defined by the jet flow part, and a jet flow opening is formed in the jet flow part; the confluence part is connected between the inflow part and the jet flow part, the confluence part is provided with a confluence hole for defining a confluence flow channel, the inner circumferential wall of the confluence hole is provided with a spiral flow guide groove, the flow guide groove defines a spiral flow channel, one end of the confluence flow channel is communicated with the inflow flow channel, and the other end of the confluence flow channel is communicated with the jet flow channel. Therefore, the spiral flow channel is arranged on the outer side of the confluence flow channel, the fluid flowing into the spiral flow channel can drive the fluid in the confluence flow channel to rotate, the fluid can be sprayed out from the water jet nozzle along a spiral path, and compared with the prior art, the size of an included angle between the jet flow direction of the fluid and the surface of an object can be more appropriate; and the anti-disturbance performance of the fluid sprayed out of the water jet cutter can be improved, so that the cutting speed and precision of the water jet cutter can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of physical cutting, in particular to a water jet nozzle and a medical water jet having the same. BACKGROUND

[0002] The water jet utilizes fluid to cut objects. Specifically, high-pressure fluid is linearly sprayed from the water jet nozzle of the water jet, the fluid contacts the object, and the impact force of the fluid acts on the surface of the object to cut the object.

[0003] In related technologies, the existing water jet sprays fluid along a straight line. When the fluid contacts the object at a complex angle, or the fluid contacts the object with a complex shape, or the fluid contacts the object with high toughness, the fluid acting on the object has a reduced component force for cutting the object due to the included angle between the spray direction of the fluid and the surface of the object, which reduces the cutting speed of the water jet. Moreover, the spray direction of the fluid is easily disturbed after being sprayed along a straight line, and the contact position of the fluid and the object is difficult to control, which reduces the cutting precision of the existing water jet and affects the cutting effect of the water jet. SUMMARY

[0004] The purpose of the present application is to make the included angle between the spray direction of the fluid sprayed from the water jet and the surface of the object more appropriate, improve the anti-disturbance performance of the fluid after being sprayed from the water jet, and thus improve the cutting speed and precision of the water jet.

[0005] To achieve the above-mentioned purpose, the present application provides a water jet nozzle.

[0006] The present application further provides a medical water jet.

[0007] According to the water jet nozzle of the present application, the water jet nozzle comprises: a flow inlet portion, the flow inlet portion defines a flow inlet channel, one end of the flow inlet channel is adapted to communicate with a fluid source to obtain fluid; a flow outlet portion, the flow outlet portion defines a flow outlet channel and is provided with a flow outlet opening, the flow outlet opening communicates with one end of the flow outlet channel; a flow converging portion, the flow converging portion is connected between the flow inlet portion and the flow outlet portion, the flow converging portion is provided with a flow converging hole, the flow converging hole penetrates the flow converging portion along the axial direction of the flow converging portion to define a flow converging channel, the inner peripheral wall of the flow converging hole is provided with a spiral flow guide groove, the flow guide groove is arranged to extend outward along the radial direction of the flow converging portion to define a spiral flow channel, one end of the flow converging channel communicates with the other end of the flow inlet channel, and the other end of the flow converging channel communicates with the other end of the flow outlet channel.

[0008] According to the water jet nozzle of the present application, by arranging the spiral flow channel outside the converging flow channel, the fluid flowing into the spiral flow channel can drive the fluid in the converging flow channel to rotate, and can make the fluid sprayed from the water jet nozzle along a spiral path, compared with the prior art, the spray direction of the fluid can be more suitable for the angle between the object surface, and the anti-disturbance performance of the fluid after being sprayed from the water jet can be improved, so that the cutting speed and precision of the water jet can be improved.

[0009] In some examples of the present application, the converging hole is configured as a tapered hole, along the axial direction of the converging hole, the inlet flow channel is arranged opposite to one end of the converging hole and in communication, the spray flow channel is arranged opposite to the other end of the converging hole and in communication, and the hole diameter of the converging hole gradually increases from the end of the converging hole close to the spray flow channel to the end close to the inlet flow channel.

[0010] In some examples of the present application, the end of the flow guide groove opposite to the spray flow part is arranged close to the end of the converging part, or the end of the flow guide groove opposite to the spray flow part is located at the edge of the end wall of the converging part, and the spiral flow channel is in communication with the spray flow channel.

[0011] In some examples of the present application, the end of the flow guide groove opposite to the inlet flow part is arranged close to the end of the converging part, or the end of the flow guide groove opposite to the inlet flow part is located at the edge of the end wall of the converging part, and the spiral flow channel is in communication with the inlet flow channel.

[0012] In some examples of the present application, the end of at least one flow guide groove is connected to the inner circumferential wall of the converging hole with a transition arc surface.

[0013] In some examples of the present application, the number of rotations of the flow guide groove is r, and r satisfies the relationship: 2≤r≤10.

[0014] In some examples of the present application, the pitch of the flow guide groove is D, and D satisfies the relationship: 1mm≤D≤5mm.

[0015] In some examples of the present application, the groove depth of the flow guide groove is H, and H satisfies the relationship: 0.5mm≤H≤5mm.

[0016] In some examples of the present application, the length of the spray flow channel is L, and L satisfies the relationship: 3mm≤L≤30mm.

[0017] According to the medical water jet of the present application, comprising: a water jet body; a water jet nozzle arranged at the end of the water jet body, the water jet nozzle being the above-mentioned water jet nozzle; a fluid source in communication with the inlet flow channel of the water jet nozzle, the fluid source being used to provide fluid to the water jet nozzle.

[0018] According to the medical water jet of the present application, the medical water jet is provided with a water jet nozzle, a spiral flow channel is arranged outside the converging flow channel of the water jet nozzle, the fluid flowing into the spiral flow channel can drive the fluid in the converging flow channel to rotate, and the fluid can be sprayed out of the water jet nozzle along a spiral path, compared with the prior art, the spray direction of the fluid can be more suitable for the included angle with the surface of the object, and the anti-disturbance performance of the fluid after being sprayed out of the medical water jet can be improved, so that the cutting speed and precision of the medical water jet can be improved, and the surgical treatment effect of the medical water jet can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view of the water jet nozzle according to the embodiment of the present application;

[0020] Figure 2 is a sectional view of the water jet nozzle according to the embodiment of the present application;

[0021] Figure 3 is a side view of the water jet nozzle according to the embodiment of the present application.

[0022] In the figure, 100, water jet nozzle;

[0023] 1, inlet; 11, inlet flow channel; 12, inlet port;

[0024] 2, jet; 21, jet flow channel; 22, jet port;

[0025] 3, converging section; 31, converging flow channel; 32, spiral flow channel; 33, converging hole; 34, flow guide groove. DETAILED DESCRIPTION

[0026] The specific embodiments of the present application will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0027] The embodiment of the present application discloses a water jet nozzle 100 and a medical water jet, the water jet nozzle 100 is used for guiding the fluid in the water jet to accelerate and spray out of the water jet nozzle 100 along a preset direction. In some embodiments, the water jet nozzle 100 is detachably arranged at the end of the water jet, in some other embodiments, the water jet nozzle 100 and the flow channel of the end of the water jet are connected in an integral molding manner, which can also be understood that the water jet nozzle 100 and the flow channel of the end of the water jet are configured as an integral molding piece.

[0028] It should be noted that the water jet can be a medical water jet or an industrial water jet. When a medical water jet is equipped with a water jet nozzle 100, the fluid inside the medical water jet can be clean water, saline solution, or disinfectant, etc. When an industrial water jet is equipped with a water jet nozzle 100, the fluid inside the industrial water jet can be clean water or a liquid mixed with abrasive particles (such as diamond grit), etc. The following description of this application is based on the premise that the water jet is a medical water jet.

[0029] like Figures 1-3 As shown, the water jet nozzle 100 according to an embodiment of this application includes: an inlet section 1, a jet section 2, and a confluence section 3. The inlet section 1 defines an inlet channel 11, one end of which is adapted to communicate with a fluid source to obtain fluid. In some embodiments, the fluid source can be a hydraulic pump, which can supply fluid (e.g., physiological saline) into the inlet channel.

[0030] In some embodiments, the inlet channel 11 extends through the inlet portion 1 along the axial direction of the water jet nozzle 100, and an inlet port 12 is formed on the end wall of the inlet portion 1. The inlet port 12 is used to connect to a fluid source or a fluid pipeline. It should be noted that the axial direction of the water jet nozzle 100 can be... Figure 2 The left and right directions in the middle. However, this application is not limited to this. For example, in some embodiments, the inlet channel 11 extends along the axial direction of the water jet nozzle 100 and does not penetrate the inlet portion 1, and the inlet port 12 is located on the outer peripheral wall of the inlet portion 1.

[0031] The jet section 2 defines a jet channel 21 and has a jet nozzle 22 on its outer wall. The jet nozzle 22 is connected to one end of the jet channel 21. Fluid flowing into the water jet nozzle 100 can be ejected through the jet nozzle 22 to cut objects. When the water jet nozzle 100 is used in a medical water jet, the objects cut by the fluid can include, but are not limited to, muscles or organs. In some preferred embodiments, the jet channel 21 can extend through the jet section 2 along the axial direction of the water jet nozzle 100, and the jet nozzle 22 is formed on the end wall of the jet section 2. This arrangement can reduce the bends in the jet channel 21, thereby reducing the pressure loss of the fluid in the jet channel 21.

[0032] Furthermore, the confluence section 3 is connected between the inlet section 1 and the jet section 2. The confluence section 3 defines a confluence channel 31 and a spiral channel 32. One end of the confluence channel 31 is connected to the other end of the inlet channel 11, and the other end of the confluence channel 31 is connected to the other end of the jet channel 21. The fluid supplied by the fluid source to the water jet nozzle 100 can flow sequentially along the inlet channel 11, the confluence channel 31 and the jet channel 21 to be ejected outside the water jet nozzle 100.

[0033] Specifically, such as Figure 2As shown, the confluence part 3 is provided with a confluence hole 33 penetrating the confluence part 3 along the axial direction of the confluence part 3, the confluence hole 33 defines the confluence flow channel 31, the inner peripheral wall of the confluence hole 33 is provided with a spiral flow guide groove 34 extending outward along the radial direction of the confluence part 3, and the flow guide groove 34 defines the spiral flow channel 32. By providing the flow guide groove 34 on the inner peripheral wall of the confluence hole 33, the technical effect that the confluence flow channel 31 and the spiral flow channel 32 are in communication can be achieved.

[0034] The spiral flow channel 32 spirally winds outside the confluence flow channel 31 and is in communication with the confluence flow channel 31. After the fluid flows from the inflow part 1 to the confluence part 3, part of the fluid can flow along the confluence flow channel 31 towards the jet flow channel 21, and another part of the fluid can flow along the spiral flow channel 32 towards the jet flow channel 21. The fluid in the spiral flow channel 32 is guided by the inner wall of the spiral flow channel 32, and the fluid in the spiral flow channel 32 can flow in a spiral path in the confluence part 3. At the same time, by making the spiral flow channel 32 in communication with the confluence flow channel 31, under the action of fluid viscosity, the fluid in the spiral flow channel 32 can drive the fluid in the confluence flow channel 31 to rotate, so that when the fluid in the confluence part 3 flows to the jet part 2, the fluid in the spiral flow channel 32 and the fluid in the confluence flow channel 31 both rotate, and the fluid ejected from the jet orifice 22 of the jet part 2 can move along a spiral path.

[0035] When the fluid contacts an object at a complex angle, or the fluid contacts an object with a complex shape, or the fluid contacts an object with high toughness, due to the rotation of the fluid, the direction of motion of the fluid is always perpendicular or close to perpendicular to the surface of the object, and the component force of the impact force of the fluid acting on the object for cutting the object increases, thereby making the object more easily cut. Moreover, the fluid moves along a spiral path, which is more likely to peel off the material on the surface of the object, and can further improve the cutting efficiency of the water jet.

[0036] When the water jet nozzle 100 is provided in a medical water jet, the water jet nozzle 100 of the present application can make the cutting speed of the medical water jet higher when the medical water jet is used to process some biological tissues with complex shapes, high toughness or large area peeling, thereby reducing the operation time and further reducing the harm of the operation to the patient.

[0037] In addition, when the fluid moves along a spiral path after being ejected from the jet orifice 22 of the jet part 2, the fluid is subjected to a centripetal force along the radial direction of the jet towards the center of the jet, and the fluid is not easily disturbed by the outside, so that the jet of the water jet can be more concentrated, the mis-cutting of the water jet on the surrounding objects of the object to be cut can be avoided, the cutting precision of the water jet is improved, and the controllability of the water jet is also improved.

[0038] Therefore, according to the water jet nozzle 100 described in the embodiments of this application, by providing a spiral channel 32 on the outside of the confluence channel 31, the fluid flowing into the spiral channel 32 can drive the fluid in the confluence channel 31 to rotate, so that the fluid can be sprayed out from the water jet nozzle 100 along the spiral path. Compared with the prior art, the angle between the fluid jet direction and the object surface can be more suitable, and the anti-disturbance performance of the fluid after being sprayed out of the water jet can also be improved, thereby improving the cutting speed and accuracy of the water jet.

[0039] Furthermore, the bottom and sidewalls of the guide channel 34 can act as boundary constraints for the fluid, limiting the disorderly diffusion of the fluid in the radial direction of the confluence section 3. This allows the fluid to remain relatively concentrated during its spiral motion, thereby minimizing the occurrence of uneven flow velocity or energy within the fluid.

[0040] According to the water jet nozzle 100 of this application embodiment, the flow guide 34 can be configured to rotate counterclockwise or clockwise on the inner peripheral wall of the confluence hole 33. The specific rotation direction of the flow guide 34 can be set according to the material being cut by the water jet or the user's habits. For example, when the water jet is used to cut wood, some fiber-reinforced composite materials, or when cutting along the natural texture of biological tissue during surgery, by reasonably setting the rotation direction of the flow guide 34, unnecessary disturbance of the fluid to the surrounding material of the material to be cut can be reduced, thereby improving the smoothness and cutting accuracy of the cut surface of the cut item.

[0041] like Figure 2 As shown, in some embodiments of this application, the depth of the guide channel 34 is H, where H satisfies the relationship: 0.5mm ≤ H ≤ 5mm. The specific depth of the guide channel 34 can be set according to the design pressure, flow rate, and jet energy of the water jet. In some embodiments of this application, when the guide channel 34 has a deeper depth, it can accommodate more fluid, allowing the fluid in the confluence 3 to rotate more fully. This helps the fluid ejected from the water jet nozzle 100 to cut materials with high toughness, such as cutting adhered soft tissue in surgery or cutting composite materials with fibrous structures in industry. It should be noted that when the depth of the guide channel 34 is too large, the energy lost by the fluid in the spiral flow channel 32 is greater, which also increases the processing difficulty of the guide channel 34.

[0042] When the flow guide groove 34 has a shallow groove depth, the fluid flow rate in the flow converging portion 3 can be increased, which helps to concentrate the energy of the fluid, and the shallow groove depth of the flow guide groove 34 also helps to reduce the processing difficulty of the flow guide groove 34. Thus, by setting the groove depth of the flow guide groove 34 to 0.5mm-5mm, the shape of the spiral flow channel 32 can be more suitable, so that the fluid in the flow converging portion 3 can obtain sufficient rotation, and the fluid energy ejected by the water jet can be more concentrated.

[0043] As shown in Figure 2 some embodiments of the present application, the flow converging hole 33 is configured as a tapered hole, along the axial direction of the flow converging hole 33, the inflow flow channel 11 is arranged opposite and in communication with one end of the flow converging hole 33, and the jet flow channel 21 is arranged opposite and in communication with the other end of the flow converging hole 33. From the end of the flow converging hole 33 close to the jet flow channel 21 to the end close to the inflow flow channel 11, the hole diameter of the flow converging hole 33 gradually increases. The axial direction of the flow converging hole 33 can refer to the left-right direction in Figure 2 . By configuring the flow converging hole 33 as a tapered hole, the flow rate of the fluid gradually increases during the flow of the fluid from the end of the flow converging portion 3 close to the inflow portion 1 to the end close to the jet flow portion 2, and the fluid can be ejected from the water jet head 100 with higher kinetic energy, so that the fluid can cut objects with greater impact force.

[0044] In addition, by coaxially arranging the flow converging flow channel 31 with the inflow flow channel 11 and the jet flow channel 21, the energy loss of the fluid when flowing between the inflow portion 1 and the flow converging portion 3 and between the flow converging portion 3 and the jet flow portion 2 can be reduced, which helps to further increase the kinetic energy of the fluid ejected by the water jet.

[0045] In some embodiments of the present application, the end of the flow guide groove 34 opposite to the jet flow portion 2 is arranged close to the end of the flow converging portion 3, that is, the interval distance between the end of the flow guide groove 34 opposite to the jet flow portion 2 and the end of the flow converging portion 3 close to the jet flow portion 2 (i.e., the left end of the flow converging portion 3 in Figure 2 ) is greater than 0. Such arrangement can facilitate the arrangement of other structures between the flow converging portion 3 and the jet flow portion 2 during the flow of the fluid from the flow converging portion 3 to the jet flow portion 2, so that the fluid can be ejected from the water jet head 100 with a more complex rotation trajectory, thereby meeting the performance design requirements of the water jet head 100.

[0046] In some other embodiments, as shown in Figure 1 , Figure 2 , the end of the flow guide groove 34 opposite to the jet flow portion 2 is located at the edge of the end wall of the flow converging portion 3, that is, the interval distance between the end of the flow guide groove 34 opposite to the jet flow portion 2 and the end of the flow converging portion 3 close to the jet flow portion 2 (i.e., the left end of the flow converging portion 3 in Figure 2The interval distance between the left end of the middle converging section 3 and the right end of the middle converging section 3 is equal to 0, and the spiral flow channel 32 is communicated with the jet flow channel 21. In this way, the fluid can flow more smoothly into the jet flow channel 21 after the fluid is rotated in the spiral flow channel 32, and the fluid can be further converged and energy-adjusted in the water jet head 100, so that the jet flow pattern generated by the water jet can be more suitable.

[0047] Further, the end of the flow guide groove 34 opposite to the inlet flow section 1 is arranged close to the end of the middle converging section 3, that is, the interval distance between the end of the flow guide groove 34 opposite to the inlet flow section 1 and the end of the middle converging section 3 close to the inlet flow section 1 (i.e. the right end of the middle converging section 3) is greater than 0. Figure 2 The interval distance between the left end of the middle converging section 3 and the right end of the middle converging section 3 is equal to 0, and the spiral flow channel 32 is communicated with the jet flow channel 21. In this way, the fluid can flow more smoothly into the jet flow channel 21 after the fluid is rotated in the spiral flow channel 32, and the fluid can be further converged and energy-adjusted in the water jet head 100, so that the jet flow pattern generated by the water jet can be more suitable.

[0048] In some other embodiments, as shown in Figure 1 、 Figure 2 the end of the flow guide groove 34 opposite to the inlet flow section 1 is located at the edge of the end wall of the middle converging section 3, that is, the interval distance between the end of the flow guide groove 34 opposite to the inlet flow section 1 and the end of the middle converging section 3 close to the inlet flow section 1 (i.e. the right end of the middle converging section 3) is equal to 0. Figure 2 The interval distance between the left end of the middle converging section 3 and the right end of the middle converging section 3 is equal to 0, and the spiral flow channel 32 is communicated with the jet flow channel 21. In this way, the fluid can flow more smoothly into the jet flow channel 21 after the fluid is rotated in the spiral flow channel 32, and the fluid can be further converged and energy-adjusted in the water jet head 100, so that the jet flow pattern generated by the water jet can be more suitable.

[0049] In some embodiments of the present application, as shown in Figure 3As shown, the end of the at least one flow guide groove 34 is connected with the inner wall of the converging hole 33 by a transition arc surface. It should be noted that the end of the flow guide groove 34 is two, one of which is opposite to the jet part 2, and the other is opposite to the inlet part 1. By setting the transition arc surface between the end of the flow guide groove 34 opposite to the inlet part 1 and the inner wall of the converging hole 33, when the fluid flows from the converging flow channel 31 to the spiral flow channel 32, the fluid is not easy to collide with the side wall of the flow guide groove 34 to generate vortex and / or turbulence, which can reduce the energy loss of the fluid in the converging part 3, and can reduce the influence on the speed and stability of the fluid after being sprayed from the water jet head 100. At the same time, compared with the flat transition surface between the end of the flow guide groove 34 opposite to the inlet part 1 and the inner wall of the converging hole 33, the surface transition of the transition arc surface is smoother, and the change of the motion direction of the fluid is more gentle, which can further reduce the vortex and / or turbulence generated when the fluid flows from the converging flow channel 31 to the spiral flow channel 32.

[0050] Similarly, by setting the transition arc surface between the end of the flow guide groove 34 opposite to the jet part 2 and the inner wall of the converging hole 33, when the fluid flows from the spiral flow channel 32 back to the converging flow channel 31, the fluid is not easy to collide with the side wall of the flow guide groove 34 to generate vortex and / or turbulence, which can reduce the energy loss of the fluid in the converging part 3, and can reduce the influence on the speed and stability of the fluid after being sprayed from the water jet head 100. At the same time, compared with the flat transition surface between the end of the flow guide groove 34 opposite to the jet part 2 and the inner wall of the converging hole 33, the surface transition of the transition arc surface is smoother, and the change of the motion direction of the fluid is more gentle, which can further reduce the vortex and / or turbulence generated when the fluid flows from the spiral flow channel 32 to the converging flow channel 31.

[0051] In some preferred embodiments, the two end of the flow guide groove 34 is connected with the inner wall of the converging hole 33 by a transition arc surface, which can effectively reduce the energy loss of the fluid in the converging part 3, and help to improve the speed and stability of the fluid after being sprayed from the water jet head 100.

[0052] In some embodiments of the present application, the number of rotations of the flow guide groove 34 is r, which satisfies the relationship: 2≤r≤10. When the number of rotations of the flow guide groove 34 is too large, the flow time and distance of the fluid in the spiral flow channel 32 is too long, and the energy loss of the fluid in the spiral flow channel 32 increases, which will cause the energy of the fluid after being sprayed from the water jet head 100 to be too small, affecting the cutting effect of the water jet. Moreover, too large number of rotations of the flow guide groove 34 will make the structure of the water jet head 100 complex, and the manufacturing process required in the manufacturing of the water jet head 100 is higher, which significantly increases the production cost of the water jet.

[0053] When the number of rotations of the guide channel 34 is too small, the flow time and distance of the fluid in the spiral channel 32 are too short. The fluid in the spiral channel 32 cannot fully drive the fluid in the confluence channel 31 to rotate. The rotation effect of the fluid after being ejected from the water jet nozzle 100 is not obvious, which leads to a decrease in the speed of the water jet cutting the object, and the direction of the fluid jet is easily disturbed.

[0054] By setting the rotation number of the guide channel 34 to 2 to 10 revolutions, when the water jet nozzle 100 is used in a handheld medical water jet, appropriately reducing the rotation number of the guide channel 34, for example, setting the rotation number of the guide channel 34 to be closer to 2 revolutions, can meet the compact design requirements of the handheld medical water jet. When the water jet nozzle 100 is used in an industrial water jet, appropriately increasing the rotation number of the guide channel 34, for example, setting the rotation number of the guide channel 34 to be closer to 10 revolutions, can meet the design requirements of industrial water jets for processing thicker or more difficult-to-cut materials.

[0055] like Figure 2 As shown, in some embodiments of this application, the pitch of the guide groove 34 is D, where D satisfies the relationship: 1mm ≤ D ≤ 5mm. When the pitch of the guide groove 34 is too small, the flow space of the fluid within the spiral channel 32 becomes too narrow, leading to increased friction between fluids and turbulence within the confluence section 3. This results in significant energy loss within the confluence section 3, affecting the stability and energy level of the fluid ejected from the water jet nozzle 100. The jet is prone to dispersion and irregular shape, reducing the cutting effect of the water jet. Furthermore, a small pitch in the guide groove 34 requires higher machining precision in the water jet nozzle 100 manufacturing process, increasing the manufacturing cost of the water jet. It also results in excessively thin sidewalls of the guide groove 34, which can break under the scouring of high-pressure fluid.

[0056] When the pitch of the guide channel 34 is too large, the fluid in the guide channel 34 cannot fully drive the fluid in the confluence channel 31 to rotate. The rotation effect of the fluid after being ejected from the water jet nozzle 100 is not obvious, which leads to a decrease in the speed of the water jet cutting the object, and the direction of the fluid jet is easily disturbed.

[0057] By designing the pitch of the guide channel 34 to be 1mm to 5mm, it is possible to ensure that the fluid flows smoothly in the spiral channel 32, thereby avoiding mutual interference between the fluids in the guide channel 34. It is also possible to ensure that the sidewall of the guide channel 34 has sufficient strength, so as to minimize the deformation or breakage of the sidewall of the guide channel 34 when the fluid flows through it.

[0058] like Figure 2As shown, in some embodiments of the present application, the length dimension L of the jet flow channel 21 satisfies the relationship: 3mm≤L≤30mm. When the length dimension of the jet flow channel 21 is too short, the fluid cannot be well stabilized in the jet flow channel 21 after being shaped in the confluence part 3, and the fluid is likely to have a large divergence after being sprayed from the water jet head 100, thereby affecting the cutting precision and depth of the water jet. When the length dimension of the jet flow channel 21 is too long, it is likely to cause a large energy loss of the fluid in the jet flow channel 21, and also cause the overall length dimension of the water jet to be too long, thereby making it more difficult to operate the water jet in a handheld or limited space application scenario, and also increasing the manufacturing difficulty and cost of the water jet.

[0059] Therefore, the specific length dimension of the jet flow channel 21 can be set according to the actual use of the water jet, the desired jet flow effect, and the overall structural dimension of the water jet. When the water jet is used in an application scenario of high-precision and high-energy-density jet flow (such as medical surgery or precision electronic component processing), the length dimension of the jet flow channel 21 can be designed to be short, so as to reduce the energy diffusion of the jet flow in the jet flow channel 21.

[0060] When the water jet is used in a scenario of a large cutting range, such as cutting a large-size block material in industry, the length dimension of the jet flow channel 21 can be designed to be long, so as to expand the cutting range of the water jet.

[0061] Based on this, the present application further provides a medical water jet. The medical water jet according to the embodiments of the present application comprises a water jet body, a water jet head 100, and a fluid source. The water jet head is arranged at the end of the water jet body, wherein the water jet head 100 is the water jet head 100 described in the above embodiments. The fluid source is in communication with the inlet flow channel 11 of the water jet head 100, and the fluid source is used to provide fluid to the water jet head 100. In some embodiments, the fluid source can be a hydraulic pump, which can provide water, physiological saline, disinfectant (such as medical alcohol), or the like to the water jet head 100, and the water jet head 100 accelerates and sprays the fluid after shaping and collecting the fluid.

[0062] The medical water jet according to the embodiments of the present application is provided with the water jet head 100, which is the water jet head 100 described in the above embodiments. By arranging the spiral flow channel 32 outside the confluence flow channel 31 of the water jet head 100, the fluid flowing into the spiral flow channel 32 can drive the fluid in the confluence flow channel 31 to rotate, and the fluid can be spirally sprayed from the water jet head 100. Compared with the prior art, the included angle between the jet flow direction of the fluid and the surface of the object can be adjusted, and the anti-disturbance performance of the fluid after being sprayed from the medical water jet can be improved, thereby the cutting speed and precision of the medical water jet can be improved, and the surgical treatment effect of the medical water jet can be improved.

[0063] The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, some improvements and replacements can be made without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A water jet nozzle, characterized in that, include: The inlet section defines an inlet channel, one end of which is adapted to communicate with a fluid source to obtain fluid. The jet section defines a jet channel and has a jet nozzle on its outer wall, the jet nozzle being connected to one end of the jet channel; A confluence section is provided, which is connected between the inlet section and the jet section. The confluence section is provided with a confluence hole, which penetrates the confluence section along the axial direction to define a confluence channel. The inner peripheral wall of the confluence hole is provided with a spiral guide groove, which extends outward along the radial direction of the confluence section to define a spiral channel. One end of the confluence channel is connected to the other end of the inlet channel, and the other end of the confluence channel is connected to the other end of the jet channel.

2. The water jet nozzle according to claim 1, characterized in that, The confluence hole is constructed as a tapered hole. Along the axial direction of the confluence hole, the inlet channel is opposite to and connected to one end of the confluence hole, and the jet channel is opposite to and connected to the other end of the confluence hole. The diameter of the confluence hole gradually increases from the end of the confluence hole near the jet channel to the end near the inlet channel.

3. The water jet nozzle according to claim 2, characterized in that, The end of the guide channel opposite to the jet section is located near the end of the confluence section, or The end of the guide channel opposite to the jet section is located at the edge of the end wall of the confluence section, and the spiral channel is connected to the jet channel.

4. The water jet nozzle according to claim 3, characterized in that, The end of the guide channel opposite to the inlet is located near the end of the confluence section, or The end of the guide channel opposite to the inlet section is located at the edge of the end wall of the confluence section, and the spiral flow channel is connected to the inlet flow channel.

5. The water jet nozzle according to any one of claims 2-4, characterized in that, At least one of the guide channels has an inclined transition arc surface connecting the bottom of the channel to the inner peripheral wall of the confluence hole.

6. The water jet nozzle according to claim 1 or 2, characterized in that, The number of rotations of the guide channel is r, and r satisfies the relationship: 2≤r≤10.

7. The water jet nozzle according to claim 1 or 2, characterized in that, The pitch of the guide channel is D, and D satisfies the relationship: 1mm≤D≤5mm.

8. The water jet nozzle according to claim 1 or 2, characterized in that, The depth of the guide channel is H, and H satisfies the relationship: 0.5mm≤H≤5mm.

9. The water jet nozzle according to claim 1, characterized in that, The length of the jet channel is L, and L satisfies the relationship: 3mm≤L≤30mm.

10. A medical water knife, characterized in that, include: Waterjet body; A water jet nozzle, wherein the water jet nozzle is disposed at the end of the water jet body, and the water jet nozzle is the water jet nozzle according to any one of claims 1-9; A fluid source is connected to the inlet channel of the water jet nozzle, and the fluid source is used to supply fluid to the water jet nozzle.

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