A cyclone jet structure, a guide flow protection structure and a jet

Abstract

The application discloses a rotational flow injection structure, a flow guide protection structure and an injector, and relates to the technical field of the injector, in particular to the rotational flow injection structure, the flow guide protection structure and the injector. The rotational flow injection structure comprises a base, a flow distribution piece and a rotational flow groove. The flow distribution piece is arranged above the base, and a plurality of rotational flow grooves are formed between the flow distribution pieces. The rotational flow groove is connected with the rotational flow groove. The rotational flow injection structure, the flow guide protection structure and the injector and the working structure break the conventional design by arranging the rotational flow injection assembly in the output inner hole. In the working process, the structure enables the fluid to directly enter the side flow distribution groove of the rotational flow piece from the sealing line. By reducing the flow channel space and the complexity of the flow channel shape, the energy loss of the fluid flowing through the rotational flow structure is reduced, the fluid energy is more efficiently converted into the injection kinetic energy, the injection speed is higher, and the injection atomized particles are more detailed.

Description

Technical Field

[0001] The present invention relates to the field of ejector technology, and in particular to a swirling jet structure, a flow guiding and protection structure, and an ejector. Background Technology

[0002] An ejector is a device that ejects internal working fluids such as liquids and gases. The most common type on the market today is the electromagnetic ejector. By giving a rated signal to the electromagnetic coil inside the housing, electrical energy is converted into magnetic energy. The magnetic force on the valve core overcomes the action of the internal fluid, spring force, or friction to move axially, opening the sealing coupling structure. Under the action of fluid input pressure, the fluid medium is ejected from the nozzle of the guide vane, realizing flow output. When the coil signal inside the electromagnetic structure is interrupted, the magnetic force decreases, and the sealing coupling structure closes under the action of spring force, realizing the action of stopping the output flow. Different flow outputs can be achieved by controlling the opening and closing time of the pulsating sealing coupling.

[0003] Existing injectors, such as the "Swirl atomization structure of a single-hole atomizing injector" (application number CN201711193762.8), divide the fluid into two parts: one part passes through a swirling orifice, and the other part passes through a swirling groove. However, due to the obstruction of the metering plate at the bottom of the swirling groove, the fluid impacting the bottom of the groove will rapidly generate violent scattering, thus impacting the remaining fluid. This impacts the fluid beam after passing through the valve orifice, forming turbulence, or swirling flow distributed along the direction of the swirling groove, achieving atomization and improving the atomization effect. However, this design has some problems:

[0004] 1. The flow direction of the working fluid will cause a lot of energy loss, resulting in less energy being ejected through the nozzle and an excessively long swirling channel.

[0005] 2. The swirling structure used here produces a relatively straight atomization direction after the fluid is ejected, and it cannot disperse to both sides.

[0006] 3. Due to the limitations of the atomizing plate, the nozzle plate is designed to be relatively thin. In order to prevent insufficient spray energy, it is designed to be as thin as possible, which makes it prone to bursting.

[0007] 4. Due to manufacturing issues, it is very inconvenient to integrate the two or more layers of guide plates and swirl plates into one piece. Under pressure, they may not fit together properly. When the flow channels collide and atomize, they can easily seep into the gaps, resulting in an unsatisfactory swirl process. Summary of the Invention

[0008] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0009] In view of the problems existing in the above-mentioned swirling jet structure, the first embodiment of the present invention is proposed.

[0010] Therefore, one of the objectives of this invention is to provide a swirling jet structure that controls fluid energy conversion and flow direction to achieve a faster overall jet speed and finer spray particles.

[0011] To solve the above-mentioned technical problems, the swirling jet structure of the present invention provides the following technical solution: it includes a base on which a flow-dividing groove is formed by a recess from the outside to the inside; a flow-dividing member is disposed above the base, and a plurality of the flow-dividing members form swirling grooves with each other, and the flow-dividing grooves are connected to the swirling grooves.

[0012] In a preferred embodiment of the swirling jet structure of the present invention, the flow divider includes a first flow divider surface and a second flow divider surface, and a first included angle is formed between the first flow divider surface and the second flow divider surface.

[0013] In a preferred embodiment of the swirling jet structure of the present invention, the flow divider includes a first swirling surface, a second swirling surface, and a third swirling surface. The first swirling surface is a plane, and the second swirling surface extends in an arc shape from one side of the first swirling surface to form the second swirling surface. The third swirling surface extends in an arc shape from one side of the second swirling surface to form the third swirling surface. The second swirling surface and the third swirling surface intersect to form a second included angle.

[0014] The beneficial effects of this invention are as follows: By setting the swirling jet structure in the output inner hole, it breaks with conventional design. During operation, this structure allows the fluid to directly enter the side flow channel of the swirling vane from the sealing line. By reducing the flow channel space and the complexity of the flow channel shape, the energy loss of the fluid flowing through the swirling structure can be reduced, and the fluid energy can be more efficiently converted into jet kinetic energy to obtain higher jet speed and finer jet atomized particles.

[0015] In view of the problems existing in the above-mentioned flow guidance and protection structures, a second embodiment of the present invention is proposed.

[0016] Therefore, another objective of this invention is to provide a flow guiding and protection structure, which aims to reduce the risk of decreased injection metering accuracy and changes in injection atomization effect caused by urea crystallization under urea conditions, and to reduce the risk of structural deformation and cracking caused by low-temperature urea freezing, by minimizing the flow channel cavity space.

[0017] To solve the above-mentioned technical problems, the flow guiding and protection structure of the present invention provides the following technical solution: it includes the swirling jet structure as described in the claims, and further includes a flow guide plate, which is connected to one end of the flow divider and fixed to the inner surface of the jet groove; a protective sleeve is disposed on the inner surface of the jet groove and fits against the flow guide plate.

[0018] As a preferred embodiment of the flow guiding and protection structure of the present invention, a spray hole is provided at the central axis of the flow guide plate, and the central axis of the spray hole coincides with the central axis of the swirling channel; the spray hole includes a first spray surface and a second spray surface; the first spray surface is a cylindrical hole surface, extending from below the first spray surface to the second spray surface to form a third included angle.

[0019] As a preferred embodiment of the flow guiding and protection structure of the present invention, the protective sleeve includes a third spray surface and a fourth spray surface; the third spray surface is formed by extending vertically from one side of the second spray surface, and the third spray surface and the second spray surface intersect to form a fourth included angle, and the four spray surfaces extending from below the third spray surface to the inclined surface form a fifth included angle; a chamfer is provided at the corner of the spray groove.

[0020] Another beneficial effect of the present invention is that by setting only one swirling jet structure in the output inner hole and connecting it with the flow guide protection structure, the cavity space is reduced, and the swirling working fluid can be directly ejected from the nozzle on the flow guide plate and collide with the air to obtain a faster overall jet speed and finer spray particles. At the same time, the protective sleeve compacts the flow guide plate and protects it from cracking.

[0021] In view of the problems existing in the above-mentioned injectors, a third embodiment of the present invention is proposed.

[0022] Therefore, another object of the present invention is to provide an injector that, by opening or closing the working flow channel electromagnetically, facilitates the diversion of the swirling jet structure in the output inner hole, thereby reducing energy loss.

[0023] To solve the above-mentioned technical problems, the injector of the present invention provides the following technical solution: it includes the swirling injection structure and the flow guiding and protection structure as described in the claims, and also includes a valve core disposed in the injector and one end connected to the steel ball; a valve seat fixedly disposed on the inner surface of the working chamber and cooperating with the steel ball.

[0024] In a preferred embodiment of the injector described in this invention, the steel ball is able to engage with the valve seat, and the sealing line of the valve seat matches the outer surface of the steel ball.

[0025] In a preferred embodiment of the injector described in this invention, the output inner hole in the valve seat is connected to the injection groove.

[0026] In a preferred embodiment of the injector described in this invention, a gap exists between the valve seat and the steel ball, and the steel ball is capable of sliding within the valve seat.

[0027] Another beneficial effect of the present invention is that, under the action of fluid input pressure, the fluid medium is ejected from the nozzle of the guide vane to achieve flow output. When the coil signal in the electromagnetic structure is interrupted, the magnetic force decreases, the working flow channel closes, and the flow output action is stopped. Different flow outputs can be achieved by controlling the opening and closing time of the pulsating steel ball. Through the swirling jet structure, the fluid is accelerated into the nozzle and ejected at high speed. The high-speed fluid rubs and collides with the external air, causing it to break into particles, thus achieving a spray effect. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0029] Figure 1 This is a schematic diagram of the connection structure between the flow divider and the swirling channel in the swirling jet structure of the present invention.

[0030] Figure 2 This is a schematic diagram of the connection structure between the second and third swirling surfaces of the swirling jet structure of the present invention.

[0031] Figure 3 This is a schematic diagram of the working flow direction of S2, S3 and S4 of the swirling jet structure of the present invention.

[0032] Figure 4 This is a cross-sectional view of the connection between the flow divider and the base in the swirling jet structure of the present invention.

[0033] Figure 5 This is a cross-sectional view of the connection between the flow divider and the flow guide plate in the swirling jet structure and the flow guide protection structure of the present invention.

[0034] Figure 6 This is a schematic diagram of the overall partial cross-sectional structure of the injector of the present invention.

[0035] Figure 7 The injector of the present invention Figure 6 Enlarged structural diagram at point A in the middle.

[0036] Figure 8This is a schematic diagram of the injection simulation data of the three-lobed flow divider of the swirling jet of the present invention.

[0037] Figure 9 This is a schematic diagram of the four-lobed flow divider structure of the swirling jet of the present invention.

[0038] Figure 10 This is a schematic diagram of the injection simulation data of the four-lobed flow divider of the swirling jet of the present invention.

[0039] Figure 11 This is a schematic diagram of the 5-lobed flow divider structure of the swirling jet of the present invention.

[0040] Figure 12 This is a schematic diagram of the injection simulation data of the 5-lobed flow divider of the swirling jet of the present invention. Detailed Implementation

[0041] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0043] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0044] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0045] Example 1

[0046] Reference Figures 1-4 In one embodiment of the present invention, a swirling jet structure 100 is provided, which includes a base 101 and a flow divider 102.

[0047] In this embodiment, the base 101 is cylindrical, and a flow divider 103 is provided on the base 101. One way to form the flow divider 103 is to form it by recessing it inward from the outer side of the cylindrical base 101. Therefore, the flow divider 103 is divided into a first flow divider surface 103a and a second flow divider surface 103b, and a first included angle α is formed between the first flow divider surface 103a and the second flow divider surface 103b.

[0048] exist Figure 1 In the embodiment shown, since there are three flow dividers 102, the first included angle α is an acute angle. The flow dividers 102 are divided into a first swirling surface 102a, a second swirling surface 102b, and a third swirling surface 102c. The first swirling surface 102a is connected to the side of the plane, and the second swirling surface 102b extends inward in an arc shape. The second swirling surface 102b and the third swirling surface 102c form a second included angle β. The third swirling surface 102c extends outward again in an inwardly concave arc shape. The first swirling surface 102a, the second swirling surface 102b, and the third swirling surface 102c form a concave swirling groove 104.

[0049] During use, the base 101, the flow divider 102, the flow divider 103, and the vortex 104 are connected in the output inner hole C-1 when output is being made. The flow divider 103 and the vortex 104 are connected. The working fluid enters the flow divider 103 and then enters the vortex 104 between the flow divider 102 from the flow divider 103. The downward guiding force of the vortex 104 accelerates the rotation and enters the nozzle for concentrated bursting, and is ejected from the output part. This working flow line is set with four stages.

[0050] Specifically, this four-level workflow is divided into:

[0051] S1. The working fluid converges at the center of the swirling groove 104 along the concave arc-shaped third swirling surface 102c.

[0052] S2. The working fluid flows along the first contact surface 103a of the plane to the first branching surface 102a of another plane, and then flows along the first branching surface 102a toward the second branching surface 102b with an outward convex arc, and converges at the center of the vortex channel 104 at the second included angle β.

[0053] S3. The working fluid flows along the second contact surface 103b and passes through the first contact surface 103a of the first guide plane at the first included angle α, thereby returning to the working flow line of S1 and subsequently coinciding with the working flow path of S1.

[0054] S4. The working fluid moves directly and vertically toward the vortex tank 104 along the second contact surface 103b, and intersects with the working fluid on the second vortex surface 102b from the working flow line of S2, converging toward the center of the vortex tank 104.

[0055] When the working fluids from the four working directions S1, S2, S3 and S4 converge, the centrifugal effect of the swirling flow in the vortex groove 104 on the fluid in the nozzle increases the tangential velocity of the fluid near the inner wall of the nozzle. After this part of the fluid is ejected, due to the high speed, it rubs and collides with the external air, causing it to break up and form finer spray particles.

[0056] like Figure 9 and Figure 10 As shown, in this embodiment, when four diverting elements 102 are provided on the base 101, the fluid will also impact the first included angle α, and then impact the swirl channel 104 and the first diverting surface 102a through the first contact surface 103a and the second contact surface 103b. At this time, the fluid on the first diverting surface 102a will flow inward along the arc of the second diverting surface 102b and converge with the liquid that previously flowed into the swirl channel 104, and impact the second included angle β at the same time, forming a collision and being ejected at high speed.

[0057] A Boolean simulation of a swirling jet system with four flow dividers 102 was performed. The simulation clearly shows that the fluid, initially at a velocity of 9.213ee+00, converges towards the center of the swirling channel 104. Through the merging of the fluids at the four points, a high-speed collision jet is formed, gradually increasing the velocity from 1.800e+01 to 2.700e+01 and finally to 3.600e+01. The ejected liquid forms a cone shape, with an angle slightly smaller than [missing value]. Figure 10 The ejection angle.

[0058] and Figure 11 and Figure 12 As shown, in this embodiment, when five diverting elements 102 are provided on the base 101, the process of fluid converging towards the first included angle α can only be achieved by first rushing towards the first contact surface 103a and the second contact surface 103b. The first contact surface 103a can guide the fluid to the second contact surface 103b and the first diverting surface 102a respectively. The liquid guided to the first diverting surface 102a will flow along the plane towards the second diverting surface 102b. The fluid will flow towards the second included angle β through the curvature of the second diverting surface 102b. The fluid guided to the second contact surface 103b will enter the vortex groove 104 along its vertical plane and converge with the fluid at the second included angle β, forming a close collision and jetting.

[0059] A scenario with five flow dividers 102 for swirling jets was simulated using Boolean operations. It can be seen that the fluid flows from five points converge towards the center of the swirling channel 104 at a speed of 8.999e+00, and then collide and are ejected at high speed. The velocity can be gradually increased from 1.800e+01 to 2.700e+01 and then to 3.600e+01. Once ejected, it will burst outward in a cone shape at a relatively large angle.

[0060] pass Figure 8 , Figure 10 and Figure 12 Simulations show that, theoretically, the more flow dividers 102 there are, the greater the fluid flow rate. However, once the number of flow dividers 102 exceeds four, the flow velocity within each flow divider 102 decreases, and the centrifugal force effect is not ideal.

[0061] And the three diversion components 102 pass through Figure 8 It can be seen that when the fluid enters the diversion tank 103, its velocity increases from 0.000e+00 to 7.402e+00, and then soars to 1.480e+01. Thus, its velocity increases while it is in the diversion tank 103, and finally increases to 2.221e+01 in the swirl tank 104, reaching a velocity of 2.961e+01 during the ejection.

[0062] In summary, since there are at least two flow dividers 102, there can be three, four, five or more, but three flow dividers 102 provide the best spraying effect. It is preferable to use a combination of three flow dividers 102. With three flow dividers 102, the velocity of the outlet fluid in the improved swirl structure of the combined swirl channel 104 has less velocity component in the Z-axis direction and more velocity component in the XY direction. The angle at which the maximum velocity occurs is more biased towards the horizontal direction, which effectively prevents the damping effect of the inner wall of the nozzle from reducing the fluid velocity and resulting in a weaker particle refinement effect. Four or more flow dividers 102 tend to spray in the horizontal direction.

[0063] Example 2

[0064] Reference Figures 1-5 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the flow guiding and protection structure 200 includes a swirling jet structure 100 and a flow guiding plate 201, which is connected to one end of the flow divider 102 and fixed to the inner surface of the jet groove C-2; and a protective sleeve 202, which is disposed on the inner surface of the jet groove C-2 and fits against the flow guiding plate 201.

[0065] In one embodiment, when the fluid in the swirling jet structure 100 enters the swirling groove 104 formed between the flow dividers 102 through the flow divider groove 103 on the base 101 and converges towards the center, the fluid will be ejected along the central axis of the guide vane 201, where a nozzle 201a is provided. The nozzle 201a is an inner cylindrical hole.

[0066] exist Figure 5 In the technical solution shown, since the central axis of the nozzle 201a coincides with the central axis of the swirl channel 104, the nozzle 201a is divided into a first spray surface 201a-1 and a second spray surface 201a-2. A third included angle γ is formed along the cylindrical hole surface of the nozzle 201a to the second spray surface 201a-2. The angle of the third included angle γ is preferably a vertical angle. The vertical angle makes the overall burst flow direction columnar and vertical.

[0067] Furthermore, the third included angle γ can also be an acute angle or an obtuse angle. If an acute angle is used, the spray angle will converge towards the center, which will easily affect the flow direction of the burst in the X and Y axis directions less. If an obtuse angle is used, the flow direction will be in all directions during the spray process, which will affect the flow direction of the burst in the Z axis less.

[0068] The second jet surface 201a-2 extends at an angle to the third jet surface 202a, forming a fourth included angle δ. This fourth included angle δ is a vertical angle. During the burst, it can better buffer the impact force and guide it to the inner hole surface, so that the columnar fluid can be burst out in a straight line. At the same time, the third jet surface 202a forms a fifth included angle o with the fourth jet surface 202b at an angle, which is an obtuse angle. The fourth jet surface 202b at an angle can effectively guide the jet angle.

[0069] Similarly, a groove extending from the bottom in a funnel shape from the inside out can be provided at the bottom end of the nozzle 201a of the guide vane 201 to facilitate the initial guidance of the fluid. Alternatively, a single thin guide vane 201 can be used to reduce production costs while improving the performance.

[0070] Compared to Example 1, during use, when the working fluid generated by the swirling jet assembly 100 passes through the flow guiding and protection assembly 200, it is concentrated and ejected at a single point through a single nozzle 201a, thereby causing the working fluid to be ejected at high speed. The high-speed fluid rubs and collides with the external air, causing it to break into particles, thus achieving a spraying effect.

[0071] The guide vane 201 can be provided with only one piece, so that the working fluid generated by the swirling does not need to pass through two or more layers of guide plates and swirling plates to cause energy loss. The swirling process is completed directly in a small output inner hole C-1, so there is no energy loss.

[0072] Furthermore, this design eliminates the need for excessive guide vanes and swirl plates to reduce energy loss, thus reducing the need for thinner guide vanes 201. This design ensures that even thicker guide vanes 201 do not cause significant energy loss. The guide vanes 201 are compacted by the protective sleeve 202 and can also be directly fixed to the spray channel C-2 by welding, resulting in smoother overall atomization.

[0073] Preferably, the protective cover 202 is not limited to elastic materials or steel. When the protective cover 202 is made of rubber, the protective cover 202 itself has elastic force and strong toughness. Therefore, during the atomization process, the protective cover 202 can reduce the vibration force generated by the collision between the atomization and the air, thereby improving the protection effect.

[0074] Furthermore, a chamfer is provided at the corner of the spray groove C-2, so that there is no arc at the corner of the inner surface of the spray groove C-2, making the fixation of the guide plate 201 more stable and allowing the guide plate 201 to fit completely in the spray groove C-2.

[0075] The remaining structure is the same as that in Example 1.

[0076] Example 3

[0077] Reference Figures 1-7 This is the third embodiment of the present invention. This embodiment differs from the second embodiment in that the injector 300 includes a swirling injection assembly 100 and a flow guiding and protection assembly 200, and also includes a valve core 301, which is disposed in the injector A and has one end connected to a steel ball 302; and a valve seat 303, which is fixedly disposed on the inner surface of the working chamber B and cooperates with the steel ball 302. The steel ball 302 can be engaged in the valve seat 303, and the sealing line of the valve seat 303 matches the outer surface of the steel ball 302.

[0078] Compared to Embodiment 2, during use, there is a gap between the valve seat 303 and the steel ball 302, allowing the steel ball 302 to slide within the valve seat 303. When a rated signal is given to the electromagnetic coil inside the injector A housing, electrical energy is converted into magnetic energy. The valve core 301, under magnetic force, overcomes the action of the internal fluid structure and moves axially, thereby causing the steel ball 302 to move as well. This prevents the steel ball 302 from closing with the valve seat 303, allowing the working fluid to flow outward through the flow path H. When the coil signal within the electromagnetic structure is interrupted, the magnetic force decreases, and under the action of the spring force within the injector A itself, the steel ball 302 closes with the valve seat 303, stopping the output flow action. The flow path H is also closed accordingly.

[0079] Furthermore, the output inner hole C-1 and the spray groove C-2 in the valve seat 303 are connected. The inner diameter of the output inner hole C-1 is not limited. However, when the output inner hole C-1 is changed, it is necessary to ensure that the ratio of the swirling spray assembly 100 is also adjusted so that the ratio of the swirling spray assembly 100 to the output inner hole C-1 is always the same. By changing the size of the swirling spray assembly 100 and the output inner hole C-1, the atomization direction and effect can be changed, making it suitable for different scenarios.

[0080] The remaining structure is the same as that in Example 2.

[0081] Combined with appendix Figures 1-6 As shown, when injector A needs to work, a built-in or external power supply is supplied to injector A. The valve core 301 then drives the steel ball 302 to move longitudinally, opening the space between the steel ball 302 and the valve seat 303. The working fluid in the working chamber B enters the output inner hole C-1 through the flow path H, and then enters the swirling groove 104 between the flow dividers 102 through the side flow divider 103 for swirling. Guided by the swirling groove 104, the fluid accelerates and rotates into the guide vane 201 in the injection groove C-2. In nozzle 201a, the fluid near the inner wall of nozzle 201a has an increased tangential velocity. After being ejected, this part of the fluid rubs and collides with the external air due to the high speed, causing it to break and form finer spray particles. The protective sleeve 202 can play a good compaction role, preventing bursting, damage or detachment. Conversely, when the power to injector A is turned off, the valve core 301 drives the steel ball 302 to move longitudinally again, closing the gap between the steel ball 302 and the valve seat 303, and no longer spraying.

[0082] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, variations in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​such as temperature, pressure, etc., installation arrangements, use of materials, color, orientation, etc. For instance, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure performing the function described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0083] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0084] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A swirling jet structure (100), characterized in that: include, A base (101) is provided with a diversion groove (103) formed by an indentation from the outside to the inside. A flow divider (102) is disposed above the base (101), and a plurality of flow dividers (102) form swirling channels (104) between each other, and the flow divider (103) is connected to the swirling channels (104); The flow divider (103) includes a first flow divider surface (103a) and a second flow divider surface (103b), and a first included angle (α) is formed between the first flow divider surface (103a) and the second flow divider surface (103b). The flow divider (102) includes a first swirling surface (102a), a second swirling surface (102b), and a third swirling surface (102c). The first swirling surface (102a) is a plane. The second swirling surface (102b) extends in an arc shape from one side of the first swirling surface (102a) and the third swirling surface (102c) extends in an arc shape from one side of the second swirling surface (102b). The second swirling surface (102b) and the third swirling surface (102c) intersect to form a second included angle (β).

2. A flow guiding and protection structure (200), comprising the swirling jet structure (100) as described in claim 1, characterized in that: It also includes, A guide vane (201) is connected to one end of the flow divider (102) and fixed to the inner surface of the spray groove (C-2); A protective sleeve (202) is disposed on the inner surface of the spray groove (C-2) and is attached to the guide plate (201).

3. The flow guiding and protection structure (200) according to claim 2, characterized in that: The guide vane (201) has a spray hole (201a) at its central axis, and the central axis of the spray hole (201a) coincides with the central axis of the vortex channel (104). The nozzle (201a) includes a first spray surface (201a-1) and a second spray surface (201a-2); The first spray surface (201a-1) is a cylindrical hole surface, which extends from below the first spray surface (201a-1) to the second spray surface (201a-2) to form a third included angle (γ).

4. The flow guiding and protection structure (200) according to claim 3, characterized in that: The protective sleeve (202) includes a third spray surface (202a) and a fourth spray surface (202b). The third spray surface (202a) is formed by extending vertically from one side of the second spray surface (201a-2), and the third spray surface (202a) and the second spray surface (201a-2) intersect to form a fourth included angle (δ). The four spray surfaces (202b) extending from below the third spray surface (202a) to the inclined plane form a fifth included angle (o). The corner of the spray groove (C-2) is chamfered.

5. An injector (300) comprising the flow guiding and protection structure (200) according to any one of claims 2 to 4, characterized in that: It also includes, A valve core (301) is disposed in the injector (A) and one end is connected to a steel ball (302). The valve seat (303) is fixedly disposed on the inner surface of the working chamber (B) and cooperates with the steel ball (302).

6. The injector (300) according to claim 5, characterized in that: The steel ball (302) can be engaged in the valve seat (303), and the sealing line of the valve seat (303) matches the outer surface of the steel ball (302).

7. The injector (300) according to claim 6, characterized in that: The output inner hole (C-1) and the injection groove (C-2) in the valve seat (303) are connected.

8. The injector (300) according to claim 7, characterized in that: There is a gap between the valve seat (303) and the steel ball (302), and the steel ball (302) can slide in the valve seat (303).

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