Injection valve

Abstract

The utility model relates to the technical field of dispensing, and discloses an injection valve which comprises a valve body base, a piezoelectric ceramic mechanism, a firing pin mechanism and a runner frame body, piezoelectric ceramic is contained in a containing cavity and abuts against one end of a lever body, the other end of the lever body is connected to a protruding part, the protruding part is arranged in a firing pin opening in a penetrating mode, and the runner frame body is arranged in the firing pin opening. The circumferential side wall of the protruding part is connected with the valve body base in a sealed mode. The protruding part abuts against the firing pin, the firing pin is connected with the first elastic reset piece, and the firing pin is partially contained in the flow channel. The piezoelectric ceramic deforms after being powered on to drive the lever body to move up and down so as to drive the protruding part to move up and down, and the firing pin shakes up and down under the action of the protruding part and the first elastic reset piece and promotes liquid in the flow channel to be sprayed out of the nozzle. Due to the fact that the circumferential outer wall of the protruding part is connected with the valve body base in the sealed mode, the liquid moving upwards is blocked, the liquid is prevented from entering the containing cavity, and therefore the liquid in the flow channel is prevented from entering the containing cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of dispensing, in particular to an injection valve. Background Art

[0002] In recent years, injection valves driven by piezoelectric ceramics have been widely used in fields such as medical treatment and material manufacturing due to their high precision, fast injection frequency, and ability to eject trace amounts of liquid materials.

[0003] Among them, the Chinese utility model patent with the publication number CN214812215U discloses a piezoelectric injection valve on April 1, 2021. The piezoelectric injection valve includes a valve body base, a piezoelectric ceramic mechanism, and a plunger. The piezoelectric ceramic mechanism includes a piezoelectric ceramic, an upper lever, and a lower lever. The piezoelectric ceramic, the upper lever, and the lower lever are all located inside the valve body base. The valve body base is provided with a plunger port. The plunger passes through the plunger port and one end of the plunger is located inside the valve body base and abuts against one end of the lower lever. The other end of the lower lever abuts against the piezoelectric ceramic. The other end of the plunger is located in the flow channel. The plunger and the piezoelectric ceramic are located on opposite sides of the lower lever. After the piezoelectric ceramic is energized, it can deform, so that the plunger moves up and down in the plunger port, causing the liquid in the flow channel to be ejected from the nozzle.

[0004] However, since one end of the plunger is located inside the valve body base and abuts against one end of the lower lever, there is a gap between the side wall of the plunger port and the plunger. When the plunger moves upward, it is easy for the plunger to bring the liquid in the flow channel into the valve body base. Summary of the Utility Model

[0005] The embodiment of the utility model aims to provide an injection valve to solve the technical problem that in the prior art, the plunger will bring the liquid in the flow channel into the valve body base during the movement process.

[0006] To solve the above technical problem, the utility model provides an injection valve, including: a valve body base, a piezoelectric ceramic mechanism, a plunger mechanism, and a flow channel frame; the valve body base includes a receiving cavity and a plunger port, and the receiving cavity communicates with the plunger port;

[0007] The piezoelectric ceramic mechanism is received in the receiving cavity. The piezoelectric ceramic mechanism includes a piezoelectric ceramic and a lower lever. The lower lever includes a lever body and a convex portion. One end of the lever body abuts against the piezoelectric ceramic. The other end of the lever body is connected to the convex portion. The convex portion passes through the plunger port and protrudes from the plunger port. The circumferential side wall of the convex portion is hermetically connected to the valve body base;

[0008] The striker mechanism includes a striker and a first elastic reset member, both of which are located outside the receiving cavity, the protrusion is opposed to the striker on a side of the lever body, the first elastic reset member is connected to the striker, and the first elastic reset member is used to provide elastic force to make the striker move toward the protrusion;

[0009] The flow channel frame includes a flow channel and a nozzle. The striker is partially accommodated in the flow channel. The flow channel is connected to the nozzle, and the striker faces the nozzle.

[0010] Preferably, the injection valve also includes a sealing ring, which is arranged along the side wall of the firing pin hole, and the protrusion passes through the sealing ring, and the protrusion and the side wall of the firing pin hole respectively abut against the inner and outer side walls of the sealing ring; the protrusion can move up and down relative to the sealing ring.

[0011] Preferably, the injection valve also includes an adjusting member, and the valve body base also includes a through hole, the through hole is connected to the receiving cavity, and the adjusting member is installed on the through hole; the piezoelectric ceramic mechanism also includes an upper lever and a second elastic reset member, the upper lever includes a first lever end and a second lever end, the first lever end and the second lever end are respectively located at opposite ends of the upper lever, the opposite sides of the first lever end respectively abut against one side of the piezoelectric ceramic and the cavity wall of the receiving cavity, the other side of the piezoelectric ceramic abuts against the lower lever, the opposite sides of the second lever end respectively abut against the second elastic reset member and the adjusting member, and the second elastic reset member and the piezoelectric ceramic are both located on the same side of the upper lever.

[0012] Preferably, the injection valve further comprises a locking mechanism, wherein the locking mechanism comprises a locking frame, wherein the locking frame is connected to the valve body base, and the flow channel frame is detachably connected to the locking frame.

[0013] Preferably, the locking frame includes a first clamping groove and a second clamping groove, the first clamping groove is located at the end of the locking frame away from the striker, and the second clamping groove is arranged obliquely downward along the direction from the striker to the locking frame; the flow channel frame includes a first connecting shaft and a second connecting shaft, the first connecting shaft is accommodated in the first clamping groove, and the second connecting shaft is accommodated in the second clamping groove; after the first connecting shaft is accommodated in the first clamping groove, the flow channel frame can be rotated so that the second connecting shaft is accommodated in the second clamping groove.

[0014] Preferably, the locking mechanism further comprises a locking block and a telescopic assembly, wherein the locking block is located in the locking frame and connected to the telescopic assembly; the telescopic assembly can drive the locking block to move toward or away from the striker mechanism; the flow channel frame comprises a first buckle opening;

[0015] The telescopic assembly can drive the locking block to approach the striker mechanism so that the locking block is accommodated in the first buckle opening, and the locking block cooperates with the flow channel frame to lock;

[0016] The telescopic assembly can drive the locking block away from the striker mechanism, so that the locking block is separated from the first buckle opening, and the flow channel frame can be disassembled.

[0017] Preferably, the telescopic assembly includes a rotating shaft and a handle, the rotating shaft is rotatably connected to the locking frame, and the handle is connected to the rotating shaft; the locking block includes a second buckle opening, the rotating shaft includes a clamping portion, the clamping portion is received in the second buckle opening, and the locking block abuts between the clamping portion and the inner wall of the locking frame.

[0018] Preferably, the locking frame includes a locking cavity and a limiting surface, and the limiting surface is located at the bottom of the locking cavity; the flow channel frame includes a first mounting portion and a second mounting portion, and the first mounting portion extends into the locking cavity and abuts against the limiting surface; the second mounting portion is located on the side of the first mounting portion that is away from the locking cavity, and the striker is connected to the second mounting portion, and the striker is located directly below the protrusion.

[0019] Preferably, the locking mechanism also includes a lifting assembly, which is connected to the locking frame and abuts against one side of the first mounting portion. The lifting assembly can drive the first mounting portion and make the other side of the first mounting portion abut against the cavity wall of the locking cavity.

[0020] Preferably, the lifting assembly includes a lifting bolt and a sliding block, the lifting bolt is connected to the sliding block and the lifting bolt is threadedly connected to the locking frame; the sliding block includes a first tightening surface, and the first tightening surface is gradually inclined downward along the direction from the lifting bolt to the sliding block; the first mounting portion is against the first tightening surface.

[0021] Compared with the prior art, in the embodiment of the present utility model, the piezoelectric ceramic abuts against one end of the lever body, which can drive the up-and-down movement of one end of the lever body. Correspondingly, the other end of the lever body will move up and down correspondingly, that is, the convex part moves up and down. Moreover, the convex part is hermetically connected to the valve body base, and the convex part abuts against the ejector pin. When the convex part moves downward, the ejector pin also moves downward. When the convex part rises, the first elastic reset member will also drive the ejector pin to move upward. During the up-and-down movement of the ejector pin, the liquid in the flow channel will be ejected from the nozzle. During the up-and-down movement of the ejector pin, since the convex part is hermetically connected to the valve body base, the ejector pin port is closed, and it is difficult for the liquid in the flow channel to enter the receiving cavity through the ejector pin port. Description of the Drawings

[0022] One or several embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the drawings in the figures do not constitute a scale limitation.

[0023] Figure 1 is a schematic structural diagram of an injection valve provided in an embodiment of the present utility model;

[0024] Figure 2 is Figure 1 a schematic cross-sectional structure diagram of the injection valve in

[0025] Figure 3 is Figure 1 a partial cross-sectional structure diagram of the injection valve in

[0026] Figure 4 is Figure 1 a schematic diagram of the principle of the piezoelectric ceramic compensation convex part of the injection valve in

[0027] Figure 5 is Figure 1 a schematic structural diagram when the locking mechanism and the flow channel frame of the injection valve in

[0028] Figure 6 is Figure 5 an assembly structure diagram of the locking mechanism and the flow channel frame of the injection valve in

[0029] Figure 7 is Figure 6 a structural diagram of the locking mechanism lock and the flow channel frame in

[0030] Figure 8 is Figure 7 a schematic locking structure diagram of the locking mechanism in

[0031] Figure 9 is Figure 1Schematic cross-sectional structure diagram of the runner frame and the ejector pin mechanism therein;

[0032] Figure 10 Schematic structure diagram of the locking mechanism and the runner frame in another embodiment;

[0033] Figure 11 is Figure 10 Schematic structure diagram of the locking frame therein;

[0034] Figure 12 is Figure 10 Schematic structure diagram of the lifting assembly therein.

[0035] The reference numerals are as follows:

[0036] 100, injection valve; 10, valve body base; 11, receiving cavity; 12, ejector pin port; 13, first fulcrum; 14, through hole; 20, piezoelectric ceramic mechanism; 21, piezoelectric ceramic; 21a, main piezoelectric ceramic; 21b, sub-piezoelectric ceramic; 22, lower lever; 221, lever body; 222, convex portion; 23, upper lever; 231, first lever end; 232, second lever end; 24, second elastic reset member; 30, ejector pin mechanism; 31, ejector pin; 32, first elastic reset member; 40, runner frame; 41, runner; 42, nozzle; 43, first connecting shaft; 44, second connecting shaft; 45, first snap-in port; 46, second pressing surface; 47, first mounting portion; 471, second pressing surface; 48, second mounting portion; 481, mounting cavity; 49, runner portion; 50, sealing ring; 51, sealing channel; 60, adjusting member; 70, locking mechanism; 71, locking frame; 711, first clamping groove; 712, second clamping groove; 72, locking block; 721, first pressing surface; 722, second snap-in port; 73, telescopic assembly; 731, rotating shaft; 7311, clamping portion; 732, handle; 74, return spring; 75, locking cavity; 76, limiting surface; 77, lifting assembly; 771, lifting bolt; 772, sliding block; 7721, first pressing surface. Detailed implementation manners

[0037] To facilitate the understanding of the present utility model, the following provides a more detailed description of the present utility model in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "connected" to another element, it can be directly on the other element, or there can be one or several intermediate elements therebetween. The terms "upper", "lower", "left", "right", "upper end", "lower end", "top" and "bottom" etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model are only for the purpose of describing specific embodiments and are not used to limit the present utility model.

[0039] Please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 which is a schematic structural diagram of an injection valve provided by an embodiment of the present utility model; Figure 2 is Figure 1 a schematic cross-sectional structure diagram of the injection valve in Figure 3 is Figure 1 a partial cross-sectional structure diagram of the injection valve in

[0040] The injection valve 100 provided in one embodiment of the utility model comprises: a valve body base 10, a piezoelectric ceramic mechanism 20, a striker mechanism 30 and a flow channel frame 40; the valve body base 10 is provided with a receiving chamber 11 and a striker port 12, the receiving chamber 11 is connected to the striker port 12; the piezoelectric ceramic mechanism 20 is received in the receiving chamber 11, the piezoelectric ceramic mechanism 20 comprises a piezoelectric ceramic 21 and a lower lever 22, the lower lever 22 comprises a lever body 221 and a protrusion 222, one end of the lever body 221 is against the piezoelectric ceramic 21, the other end of the lever body 221 is connected to the protrusion 222, the protrusion 222 is penetrated through the striker port 12, the protrusion 222 is The circumferential side wall of 22 is sealed and connected with the side wall of the striker opening 12; the striker mechanism 30 includes a striker 31 and a first elastic reset member 32, both of which are located outside the accommodating chamber 11, and the side of the protrusion 222 away from the lever body 221 can be at the striker opening 12 and abut against the striker 31, the first elastic reset member 32 is connected to the striker 31, and the first elastic reset member 32 is used to provide elastic force to make the striker 31 move toward the protrusion 222; the flow channel frame 40 is provided with a flow channel 41 and a nozzle 42, the striker 31 is partially accommodated in the flow channel 41, the flow channel 41 is connected to the nozzle 42, and the striker 31 faces the nozzle 42.

[0041] Here, it should be noted that the piezoelectric ceramic 21 has the property of spontaneous polarization, that is, the piezoelectric ceramic 21 will deform in an electric field. For example, when the piezoelectric ceramic 21 is subjected to an external electric field with the same spontaneous polarization, the polarization strength is enhanced, and the piezoelectric ceramic 21 will be extended along the polarization direction; on the contrary, when an external electric field with the opposite spontaneous polarization is applied, the piezoelectric ceramic 21 will be shortened along the polarization direction. That is, the length of the piezoelectric ceramic 21 will be extended or shortened under the action of the electric field.

[0042] When the injection valve 100 provided in this embodiment is in operation, the piezoelectric ceramic 21 is energized, and the piezoelectric ceramic 21 is alternately extended and shortened under the voltage drive, driving the protrusion 222 to move up and down. When the protrusion 222 moves downward, it pushes the striker 31 to move downward, and the first elastic reset member 32 contracts. When the protrusion 222 moves upward, the first elastic reset member 32 resets, pushing the striker 31 to move upward. Driven by the piezoelectric ceramic 21, the striker 31 moves up and down at a high speed, which can make the liquid in the flow channel 41 spray out from the nozzle 42.

[0043] The other end of the lever body 221 is connected to the protrusion 222. In this embodiment, in order to ensure that the protrusion 222 does not separate from the lever body 221 during movement, the lever body 221 and the protrusion 222 are manufactured as one piece. That is, when the other end of the lever body 221 moves up and down, the protrusion 222 moves up and down accordingly.

[0044] One side of the convex portion 222 facing away from the lever body 221 abuts against the firing pin 31. When the convex portion 222 moves downward, the firing pin 31 moves downward accordingly. When the convex portion 222 moves upward, the first elastic reset member 32 urges the firing pin 31 to move upward. During the upward movement of the firing pin 31, the firing pin 31 drives the liquid in part of the flow channel 41 to move upward. Since the outer circumferential wall of the convex portion 222 is hermetically connected to the valve body base 10, it plays a blocking role in the upward moving liquid to prevent the liquid from entering the receiving cavity 11, thus avoiding the situation that the firing pin 31 will bring the liquid in the flow channel 41 into the valve body base 10 during the movement process, and the firing pin 31 will not extend into the receiving cavity 11.

[0045] In this embodiment, there are two groups of piezoelectric ceramics 21. For the convenience of understanding, please refer to Figure 2 , the piezoelectric ceramics 21 include a main piezoelectric ceramic 21a and a sub-piezoelectric ceramic 21b. Both the main piezoelectric ceramic 21a and the sub-piezoelectric ceramic 21b abut against the same side of the lever body 221, thereby driving one end of the lever body 221 to move upward or downward, and the other end of the corresponding lever body 221 will correspondingly move downward or upward. The valve body base 10 further includes a first fulcrum 13. The first fulcrum 13 is located on the inner side wall of the receiving cavity 11. The first fulcrum 13 is approximately an arc-shaped protrusion. The contact points of the main piezoelectric ceramic 21a and the lower lever 22 and the contact points of the sub-piezoelectric ceramic 21b and the lower lever 22 are respectively located on the opposite sides of the first fulcrum 13.

[0046] To ensure that one end of the lever body 221 moves upward or downward, the electric fields applied to the main piezoelectric ceramic 21a and the sub-piezoelectric ceramic 21 are opposite. In other words, when the main piezoelectric ceramic 21a elongates, the sub-piezoelectric ceramic 21b shortens; when the main piezoelectric ceramic 21a shortens, the sub-piezoelectric ceramic 21b elongates. When the main piezoelectric ceramic 21a elongates and the sub-piezoelectric ceramic 21b shortens, the convex portion 222 moves upward; when the main piezoelectric ceramic 21a shortens and the sub-piezoelectric ceramic 21b elongates, the convex portion 222 moves downward. To better ensure the up and down movement of the convex portion 222, the lever body 221 has an inclination angle. In this embodiment, the lever body 221 is inclined upward along the direction from the lever body 221 to the convex portion 222.

[0047] It should be noted that the convex portion 222 is hermetically connected to the side wall of the firing pin port 12. Sealing silicone can be used, or multiple methods such as placing a sealing sheet can be used, not limited to one. The first elastic reset member 32 uses a spring in this embodiment, but is not limited thereto, and other elastic parts or structures can also be used for substitution.

[0048] In addition, one end of the firing pin 31 faces the nozzle 42. The firing pin 31 located in the flow channel 41 moves up and down in the flow channel 41, prompting the liquid in the flow channel 41 to be ejected from the nozzle 42 to perform the glue spraying function.

[0049] In one embodiment, the injection valve 100 further includes a sealing ring 50. The sealing ring 50 is disposed around the sidewall of the striker orifice 12. The convex portion 222 passes through the sealing ring 50, and the convex portion 222 and the sidewall of the striker orifice 12 respectively abut against the inner and outer sidewalls of the sealing ring 50, and the convex portion 222 can move up and down relative to the sealing ring 50.

[0050] Specifically, the convex portion 222 is generally cylindrical, the sealing ring 50 is generally annularly cylindrical, the sealing ring 50 is provided with a channel 51, and the convex portion 222 passes through the channel 51 to ensure that the convex portion 222 can move up and down along the channel 51. When the sealing ring 50 is fixed, the outer circumferential wall of the convex portion 222 and the sidewall of the striker orifice 12 respectively abut against the inner and outer walls of the sealing ring 50. The above-described sealing ring 50 enables the convex portion 222 and the sidewall of the striker orifice 12 to be sealingly connected, with a simple structure and convenient installation.

[0051] In one embodiment, the injection valve 100 further includes an adjusting member 60. The valve body base 10 further includes a through hole 14 that communicates with the receiving cavity 11, and the adjusting member 60 is installed in the through hole 14. The piezoelectric ceramic mechanism 20 further includes an upper lever 23 and a second elastic reset member 24. The upper lever 23 includes a first lever end 231 and a second lever end 232, and the first lever end 231 and the second lever end 232 are respectively located at opposite ends of the upper lever 23. Opposite sides of the first lever end 231 respectively abut against one side of the piezoelectric ceramic 21 and the cavity wall of the receiving cavity 11, the other side of the piezoelectric ceramic 21 abuts against the lower lever 22, and opposite sides of the second lever end 232 respectively abut against the second elastic reset member 24 and the adjusting member 60. The second elastic reset member 24 and the piezoelectric ceramic 21 are both located on the same side of the upper lever 23.

[0052] In this embodiment, the adjusting member 60 is a tightening screw, the through hole 14 is a threaded hole, the tightening screw is threadedly connected to the through hole 14, and the tightening screw is partially received in the receiving cavity 11. The second elastic reset member 24 is a spring in this embodiment. The first lever end 231 and the second lever end 232 are integrally formed and located on opposite sides of the upper lever 23.

[0053] During assembly, by tightening the adjusting member 60, the adjusting member 60 abuts against one side of the second lever end 232, and the other side of the second lever end 232 abuts against the second elastic reset member 24, so that the piezoelectric ceramic 21 obtains a preset pressure value. Moreover, the adjusting member 60 can also use other structures or components to tighten the upper lever 23.

[0054] In addition, reference can be made to Figure 4 , Figure 4 which Figure 1 is a schematic diagram of the principle of the piezoelectric ceramic compensation convex portion of the injection valve in

[0055] In this embodiment, the convex portion 222 can be regarded as the motion output point (i.e., point A), and one end of the upper lever 23 can be regarded as the adjustment point (i.e., point B). After the piezoelectric ceramic 21 is energized, it can cause the convex portion 222 to move up and down. The up and down movement of the convex portion 222 and the first elastic reset member 32 drive the ejector pin 31 to reset, so that the ejector pin 31 moves up and down, and the liquid in the flow channel 41 is discharged from the nozzle. When the convex portion 222 collides with the ejector pin 31 multiple times, wear will occur. When the ejector pin 31 is worn, in other words, the length of the ejector pin 31 becomes shorter. By further tightening the adjusting member 60, the second lever end 232 is forced to move downward, so that the first lever end 231 moves upward. Moreover, one end of the piezoelectric ceramic 21 abuts against the first lever end 231, so that the piezoelectric ceramic 21 moves upward, and the other end of the piezoelectric ceramic 21 abuts against the lower lever 22, that is, one end of the lower lever 22 moves upward, and the other end of the corresponding lower lever 22 moves downward. The other end of the lower lever 22 abuts against the ejector pin 31, and finally the shortened ejector pin 31 moves downward to compensate for the wear caused by the convex portion 222 to the ejector pin 31.

[0056] In this embodiment, both the through hole 14 and the ejector pin hole 12 are circular openings, and the axes of the through hole 14 and the ejector pin hole 12 are located on the same straight line to ensure the use stability of the piezoelectric ceramic 21.

[0057] Here, it should also be noted that in this embodiment, the piezoelectric ceramic 21 includes a main piezoelectric ceramic 21a and a sub-piezoelectric ceramic 21b. Both the main piezoelectric ceramic 21a and the sub-piezoelectric ceramic b abut against one side of the first lever end 231, and the valve body base 10 further includes a second fulcrum 15. In order to ensure that the main piezoelectric ceramic 21a and the sub-piezoelectric ceramic 21b will not tilt when placed horizontally, the second fulcrum 15 and the first fulcrum 13 are correspondingly arranged, and the contact points of the main piezoelectric ceramic 21a with the cavity wall of the receiving cavity 11 and the contact points of the sub-piezoelectric ceramic 21b with the cavity wall of the receiving cavity 11 are respectively located on both sides of the second fulcrum 15.

[0058] In other embodiments, the piezoelectric ceramic 21 can be provided as a group.

[0059] Refer to Figure 1 、 Figure 5 and Figure 6 , Figure 5 is Figure 1 the structural schematic diagram when the locking mechanism and the flow channel frame body of the injection valve in Figure 6 is Figure 5 the assembled structural schematic diagram of the locking mechanism and the flow channel frame body of the injection valve in

[0060] In one embodiment, the injection valve 100 further includes a locking mechanism 70 , which includes a locking frame 71 . The locking frame 71 is connected to the valve body base 10 , and the flow channel frame 40 is detachably connected to the locking frame 71 .

[0061] Specifically, during assembly, the striker mechanism 30 is installed on the flow channel frame 40, and then the flow channel frame 40 with the striker mechanism 30 is connected to the locking frame 71, and the flow channel frame 40 can be used after being locked by the locking frame 71. The purpose of this arrangement is that when the striker 31 is worn or the liquid in the flow channel 41 needs to be replaced, it can be quickly replaced by disassembling the flow channel frame 40.

[0062] Here, it needs to be further explained that the locking mechanism 70 can be implemented by a variety of structures, not just one locking method.

[0063] In one embodiment, the locking frame 71 is connected to the valve body base 10, and the locking frame 71 includes a first clamping groove 711 and a second clamping groove 712. The first clamping groove 711 is located at the end of the locking frame 71 away from the striker 31, and the second clamping groove 712 is arranged obliquely downward from the striker 31 to the locking frame 71; the flow channel frame 40 includes a first connecting shaft 43 and a second connecting shaft 44, the first connecting shaft 43 is accommodated in the first clamping groove 711, and the second connecting shaft 44 is accommodated in the second clamping groove 712; after the first connecting shaft 43 is accommodated in the first clamping groove 711, the flow channel frame 40 can be rotated so that the second connecting shaft 44 is accommodated in the second clamping groove 712.

[0064] Specifically, the notch of the first engaging groove 711 and the notch of the second engaging groove 712 are both connected to the outside. During assembly, the first connecting shaft 43 on the flow channel frame 40 is aligned and inserted into the first engaging groove 711, and then the flow channel frame 40 is rotated with the first connecting shaft 43 as the rotation axis center and the second connecting shaft 44 is aligned and inserted into the second engaging groove 712 to match the flow channel frame 40 with the locking frame 71. When the flow channel frame 40 is removed, the first connecting shaft 43 is also used as the rotation axis center to rotate the flow channel frame 40 so that the second connecting shaft 44 is separated from the second engaging groove 712. This arrangement can facilitate the rapid installation or removal of the flow channel frame 40, that is, in actual application, the flow channel frame 40 can be quickly replaced.

[0065] Furthermore, in this embodiment, in order to facilitate the first connecting shaft 43 to be quickly installed into the first clamping groove 711 and the second connecting shaft 44 to be quickly installed into the second clamping groove 712, the groove wall of the first clamping groove 711 and the groove wall of the second clamping groove 712 are both smoothly transitioned.

[0066] See also Figure 6 , Figure 7 and Figure 8 ,Figure 7 is Figure 6 a schematic structural view of the locking mechanism in Figure 8 is Figure 7 a schematic locking structure view of the locking mechanism in

[0067] In one embodiment, the locking mechanism 70 further includes a locking block 72 and a telescopic assembly 73. The locking block 72 is located within the locking frame body 71. The locking block 72 is connected to the telescopic assembly 73. The telescopic assembly 73 can drive the locking block 72 to move closer to or away from the firing pin mechanism 30. The runner frame body 40 includes a first snap-in opening 45;

[0068] The telescopic assembly 73 can drive the locking block 72 closer to the firing pin mechanism 30 so that the locking block 72 is received within the first snap-in opening 45, and the locking block 72 cooperates with the runner frame body 40 for locking;

[0069] The telescopic assembly 73 can drive the locking block 72 away from the firing pin mechanism 30 so that the locking block 72 disengages from the first snap-in opening 45, and the runner frame body 40 can be detached.

[0070] Specifically, after the runner frame body 40 and the locking frame body 71 are assembled, the telescopic assembly 73 will insert the locking block 72 into the first snap-in opening 45, so that the locking block 72 is locked with the runner frame body 40; at this time, the firing pin 31 is located below the convex portion 222 to ensure the stable use of the firing pin 31 when the piezoelectric ceramic 21 is working.

[0071] Here, it should be noted that the telescopic assembly 73 can adopt various structures. In this embodiment, the telescopic assembly 73 includes a return spring 74. One end of the return spring 74 is connected to the locking block 72, and the other end of the return spring 74 is connected to the locking frame body 71 (see Figure 3 ).

[0072] Among them, in order to compress the return spring 74 when the runner frame body 40 and the locking frame body 71 are assembled, in this embodiment, the locking block 72 includes a first pressing surface 721. The first pressing surface 721 is located on the side of the locking block 72 facing the firing pin 31. The first pressing surface 721 is inclined downward along the direction from the firing pin 31 to the locking block 72. The runner frame body 40 includes a second pressing surface 46. The second pressing surface 46 is located on the side of the runner frame body 40 facing the locking frame body 71. The second pressing surface 46 is inclined downward along the direction from the runner frame body 40 to the locking block 72.

[0073] Here, taking the rotation process of the runner frame 40 as an example, before the runner frame 40 and the locking frame 71 are assembled, the return spring 74 is in its original length. As the first connecting shaft 43 is installed in the first clamping groove 711, the runner frame 40 is rotated. During the rotation of the runner frame 40, the runner frame 40 will abut against the locking block 72 and cause the return spring 74 to compress until the second connecting shaft 44 is installed in the second clamping groove 712. At the same time, the return spring 74 returns to its original length and pushes the locking block 72 into the first snap port 45, completing the locking of the runner frame 40 and the locking frame 71.

[0074] In one embodiment, the telescopic assembly 73 includes a rotating shaft 731 and a handle 732. The rotating shaft 731 is rotatably connected to the locking frame 71, and the handle 732 is connected to the rotating shaft 731. The locking block 72 includes a second snap port 722, and the rotating shaft 731 includes a clamping portion 7311. The clamping portion 7311 is disposed on the outer peripheral surface of the rotating shaft 731, and the clamping portion 7311 is received in the second snap port 722. The locking block 72 abuts between the clamping portion 7311 and the inner wall of the locking frame 71.

[0075] Specifically, rotating the handle 732 can drive the clamping portion 7311 to rotate around the rotating shaft 731, so that the locking block 72 slides along the inner wall of the locking frame 71, and further makes the locking block 72 approach or move away from the striker 31.

[0076] Here, please refer to Figure 7 and Figure 8 , and taking the main view facing the handle 732 as the description perspective. Before the runner frame 40 and the locking frame 71 are cooperated, rotate the handle 732 clockwise so that the locking block 72 retracts into the locking frame 71 in the direction away from the striker 31. After the runner frame 40 and the locking frame 71 are cooperated well, rotate the handle 732 counterclockwise so that the locking block 72 moves in the direction towards the striker 31, and a part of the locking block 72 protrudes from the locking frame 71 and is received in the first snap port 45, completing the locking of the runner frame 40 and the locking frame 71.

[0077] Please refer to Figure 9 , Figure 10 and Figure 11 , Figure 9 is Figure 1 the schematic cross-sectional structure diagram of the runner frame in Figure 10 is the schematic splicing structure diagram of the locking mechanism and the runner frame in another embodiment, Figure 11 is Figure 10 the schematic structure diagram of the locking frame in

[0078] The present invention also provides another embodiment. To facilitate the distinction between the two embodiments, in another embodiment, the locking frame uses the reference numeral 71b.

[0079] In another embodiment, the locking frame 71b includes a locking cavity 75 and a limiting surface 76, the limiting surface 76 is located at the bottom of the locking cavity 75, the flow channel frame 40 includes a first mounting portion 47 and a second mounting portion 48, the first mounting portion 47 extends into the locking cavity 75 and abuts against the limiting surface 76; the second mounting portion 48 is located on the side of the first mounting portion 47 away from the locking cavity 75, the striker 31 is connected to the second mounting portion 48, and the striker 31 is located directly below the protrusion 222.

[0080] Specifically, the flow channel frame 40 is matched with the locking frame 71 by horizontally pushing the flow channel frame 40 into the locking cavity 75, wherein the first mounting portion 47 is extended into the locking cavity 75 and abuts against the limiting surface 76 to ensure that the firing pin 31 is located directly below the protrusion 222, thereby ensuring that the protrusion 222 and the firing pin 31 are stable when the injection valve 100 is working.

[0081] Here, it is necessary to briefly explain the specific structure of the flow channel frame 40 for easy understanding. The flow channel frame 40 also includes a flow channel portion 49, and the flow channel portion 49, the second mounting portion 48 and the first mounting portion 47 are arranged in sequence along one direction. The flow channel 41 is located in the flow channel portion 49, and the second mounting portion 48 includes a mounting cavity 481. The striker mechanism 30 is installed in the mounting cavity 481. The mounting cavity 481 and the flow channel 41 are connected to ensure that the liquid in the flow channel 41 flows into the mounting cavity 481. The striker 31 moves up and down to spray the liquid in the mounting cavity 481 through the nozzle 42. The nozzle 42 is located at the end of the mounting cavity 481, wherein the nozzle 42 can be formed by the cavity wall and the water outlet of the mounting cavity 481, or it can be formed by other components connected to the outside of the flow channel frame 40, and no limitation is made here.

[0082] See also Figure 10 and Figure 12 , Figure 12 yes Figure 10 Schematic diagram of the structure of the lifting component.

[0083] In another embodiment, the locking mechanism 70 further includes a lifting assembly 77, which is connected to the locking frame 71b. The lifting assembly 77 abuts against one side of the first mounting portion 47. The lifting assembly 77 can drive the first mounting portion 47 and make the other side of the first mounting portion 47 abut against the cavity wall of the locking cavity 75.

[0084] Here, it should be noted that the locking frame 71b and the locking frame 71 are two different locking structures, both of which can achieve corresponding locking effects; that is, they are two different embodiments.

[0085] Specifically, the lifting assembly 77 abuts against one side of the first mounting portion 47. The lifting assembly 77 can drive the runner frame 40 to move upward until the other side of the first mounting portion 47 abuts against the cavity wall of the locking cavity 75 by the lifting assembly 77, so as to complete the locking fit between the runner frame 40 and the locking frame 71.

[0086] It should be noted that the lifting assembly 77 can achieve the purpose of lifting the first mounting portion 47 through different structures. For example, a pull rod is connected to the first mounting portion 47 and the pull rod is pulled upward to move; for another example, a spring and so on. Examples are not given one by one here. In other words, the lifting assembly 77 is not limited to a single structure implementation.

[0087] In one embodiment, the lifting assembly 77 includes a lifting bolt 771 and a sliding block 772. The lifting bolt 771 is connected to the sliding block 772 and the lifting bolt 771 is threadedly connected to the locking frame 71; the sliding block 772 includes a first abutting surface 7721, and the first abutting surface 7721 is gradually inclined downward along the direction from the lifting bolt 771 to the sliding block 772; the first mounting portion 47 abuts against the first abutting surface 7721.

[0088] Specifically, during the process of locking the runner frame 40, by screwing the lifting bolt 771, the lifting bolt 771 and the sliding block 772 are urged to move along the direction from the lifting bolt 771 to the sliding block 772; moreover, the first abutting surface 7721 abuts against the first mounting portion 47. As the first abutting surface 7721 moves, the first mounting portion 47 is gradually lifted until the other side of the first mounting portion 47 away from the sliding block 772 abuts against the cavity wall of the locking cavity 75, thereby completing the locking.

[0089] In this embodiment, in order to further ensure that the first mounting portion 47 is gradually lifted and the lifting process is smoother, the first mounting portion 47 includes a second abutting surface 471, and the second abutting surface 471 and the first abutting surface 7721 are cooperatively arranged.

[0090] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other changes in different parts of the present invention as described above. For the sake of brevity, they are not provided in detail; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An injection valve, characterized in that, include: A valve body base, the valve body base comprising a receiving cavity and a striker port, the receiving cavity being connected to the striker port; A piezoelectric ceramic mechanism, the piezoelectric ceramic mechanism is accommodated in the accommodating cavity, the piezoelectric ceramic mechanism includes a piezoelectric ceramic and a lower lever, the lower lever includes a lever body and a protrusion, one end of the lever body is against the piezoelectric ceramic, the other end of the lever body is connected to the protrusion, the protrusion is penetrated through the striker opening and protrudes from the striker opening, and the circumferential side wall of the protrusion is sealed and connected to the valve body base; A striker mechanism, the striker mechanism comprising a striker and a first elastic reset member, the striker and the first elastic reset member are both located outside the receiving cavity, the protrusion is against the striker on a side away from the lever body, the first elastic reset member is connected to the striker, and the first elastic reset member is used to provide elastic force to make the striker move toward the protrusion; The flow channel frame comprises a flow channel and a nozzle, the striker is partially accommodated in the flow channel, the flow channel is connected to the nozzle, and the striker faces the nozzle.

2. The injection valve according to claim 1, characterized in that, It also includes a sealing ring, which is arranged along the side wall of the firing pin hole, the protrusion is penetrated by the sealing ring, and the protrusion and the side wall of the firing pin hole are respectively against the inner and outer side walls of the sealing ring; the protrusion can move up and down relative to the sealing ring.

3. The injection valve according to claim 1, characterized in that, It also includes an adjusting member, and the valve body base also includes a through hole, which is connected to the receiving cavity, and the adjusting member is installed on the through hole; the piezoelectric ceramic mechanism also includes an upper lever and a second elastic reset member, the upper lever includes a first lever end and a second lever end, the first lever end and the second lever end are respectively located at opposite ends of the upper lever, the opposite sides of the first lever end respectively abut against one side of the piezoelectric ceramic and the cavity wall of the receiving cavity, the other side of the piezoelectric ceramic abuts against the lower lever, the opposite sides of the second lever end respectively abut against the second elastic reset member and the adjusting member, and the second elastic reset member and the piezoelectric ceramic are both located on the same side of the upper lever.

4. The injection valve according to claim 1, characterized in that, It also includes a locking mechanism, which includes a locking frame, the locking frame is connected to the valve body base, and the flow channel frame is detachably connected to the locking frame.

5. The injection valve according to claim 4, characterized in that, The locking frame includes a first clamping groove and a second clamping groove, the first clamping groove is located at the end of the locking frame away from the striker, and the second clamping groove is arranged obliquely downward along the direction from the striker to the locking frame; the flow channel frame includes a first connecting shaft and a second connecting shaft, the first connecting shaft is accommodated in the first clamping groove, and the second connecting shaft is accommodated in the second clamping groove; after the first connecting shaft is accommodated in the first clamping groove, the flow channel frame can be rotated so that the second connecting shaft is accommodated in the second clamping groove.

6. The injection valve according to claim 5, characterized in that, The locking mechanism further comprises a locking block and a telescopic assembly, wherein the locking block is located in the locking frame and connected to the telescopic assembly; the telescopic assembly can drive the locking block to move toward or away from the striker mechanism; the flow channel frame comprises a first buckle opening; The telescopic assembly can drive the locking block to approach the striker mechanism so that the locking block is accommodated in the first buckle opening, and the locking block cooperates with the flow channel frame to lock; The telescopic assembly can drive the locking block away from the striker mechanism, so that the locking block is separated from the first buckle opening, and the flow channel frame can be disassembled.

7. The injection valve according to claim 6, characterized in that, The telescopic assembly includes a rotating shaft and a handle, the rotating shaft is rotatably connected to the locking frame, and the handle is connected to the rotating shaft; the locking block includes a second snap-on opening, the rotating shaft includes a snap-on portion, the snap-on portion is accommodated in the second snap-on opening, and the locking block is abutted between the snap-on portion and the inner wall of the locking frame.

8. The injection valve according to claim 4, characterized in that The locking frame includes a locking cavity and a limiting surface, and the limiting surface is located at the bottom of the locking cavity; the flow channel frame includes a first mounting portion and a second mounting portion, and the first mounting portion extends into the locking cavity and abuts against the limiting surface; the second mounting portion is located on the side of the first mounting portion away from the locking cavity, and the striker is connected to the second mounting portion, and the striker is located directly below the protrusion.

9. The injection valve according to claim 8, characterized in that, The locking mechanism also includes a lifting component, which is connected to the locking frame and abuts against one side of the first mounting portion. The lifting component can drive the first mounting portion and make the other side of the first mounting portion abut against the cavity wall of the locking cavity.

10. The injection valve according to claim 9, characterized in that, The lifting assembly includes a lifting bolt and a sliding block, the lifting bolt is connected to the sliding block and the lifting bolt is threadedly connected to the locking frame; the sliding block includes a first pressing surface, and the first pressing surface is gradually inclined downward along the direction from the lifting bolt to the sliding block; the first mounting portion is against the first pressing surface.

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