Fluid injection system and dispensing equipment

Abstract

The utility model discloses a fluid injection system and dispensing equipment, the fluid injection system comprises a valve shell, an injection piece, a locking cover and an elastic piece, and the valve shell is provided with a mounting hole; the spraying piece is installed in the installation hole in a sliding mode. The locking cover is connected to the valve shell in a threaded mode and presses the injection piece so as to prevent the injection piece from disengaging from the valve shell. The elastic piece is arranged in the valve shell and located on one side of the jetting piece, and the elastic piece is used for providing elastic force enabling the jetting piece to extrude the locking cover. According to the fluid injection system, the injection piece is installed in the installation hole in the sliding mode, the elastic piece is arranged to apply the elastic force to the injection piece to extrude the locking cover, and therefore the axial pressure between the locking cover and the valve shell can be improved, the positive pressure and the static friction force between the threads in threaded connection with the locking cover and the valve shell are improved, and the fluid injection efficiency is improved. The risk that the locking cover rotates and loosens relative to the valve shell due to impact of the opening and closing piece is reduced, the fluid injection system can adapt to long-time continuous operation, and the operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection devices, in particular to a fluid injection system and glue dispensing equipment. Background Art

[0002] In the related art, a fluid injection system includes a valve housing, an injection member, an opening and closing member and an actuator; wherein the injection member is locked and fixed in the valve housing by a locking cover threadedly connected to the valve housing, and is provided with a liquid storage chamber and an injection port connected to the liquid storage chamber, and is capable of spraying the fluid in the liquid storage chamber through the injection port; the opening and closing member and the actuator are both arranged in the valve housing, and the opening and closing member is partially located in the injection member and partially located outside the injection member, and the actuator is connected to the opening and closing member to drive the opening and closing member to open or close the injection port of the injection member; since the fluid injection system needs to frequently open and close the injection port during operation, that is, the opening and closing member needs to frequently hit the injection member, which can easily cause the locking cover to loosen, and the loosening of the locking cover will cause the opening and closing member to fail to accurately close the injection port, and make the fluid injection system unable to operate normally and affect the operating efficiency. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a fluid injection system, which can reduce the risk of loosening of the locking cover, thereby improving the operating efficiency of the fluid injection system.

[0004] The utility model also provides a dispensing device having the fluid injection system.

[0005] According to the fluid injection system of the first aspect embodiment of the utility model, it includes a valve housing, an injection member, a locking cover and an elastic member, the valve housing is provided with a mounting hole; the injection member can be slidably installed in the mounting hole; the locking cover is threadedly connected to the valve housing and presses the injection member to limit the injection member from escaping from the valve housing; the elastic member is arranged in the valve housing and is located on one side of the injection member, and the elastic member is used to provide an elastic force for the injection member to squeeze the locking cover.

[0006] The fluid injection system according to the first aspect of the present utility model has at least the following beneficial effects:

[0007] The fluid injection system of this embodiment can increase the axial pressure between the locking cover and the valve housing by installing the injection component in a slidable manner in the mounting hole and providing an elastic component to give the injection component an elastic force to squeeze the locking cover, thereby increasing the positive pressure and static friction between the threads of the threaded connection between the two, so as to reduce the risk of the locking cover rotating loose relative to the valve housing due to the impact of the opening and closing component, so that the fluid injection system can adapt to long-term continuous operation and improve working efficiency.

[0008] According to the fluid injection system of some embodiments of the first aspect of the utility model, the fluid injection system also includes an opening and closing member, which can be slidably arranged in the valve housing along the axial direction of the mounting hole, and one end of the opening and closing member is located in the injection member, and the injection port of the injection member can be opened or closed by sliding the opening and closing member; the elastic member is a compression spring, and one end is connected to the opening and closing member, and the other end is connected to the injection member.

[0009] According to the fluid injection system of some embodiments of the first aspect of the utility model, the fluid injection system also includes a guide sleeve, which can be slidably installed in the installation hole and is located on the side of the injection member away from the locking cover, the opening and closing member can be slidably inserted into the guide sleeve, and the other end of the elastic member is connected to the side of the guide sleeve away from the injection member to connect the injection member through the guide sleeve.

[0010] According to the fluid injection system of some embodiments of the first aspect of the utility model, a liquid storage chamber is arranged inside the injection member, and an opening is formed on the side of the injection member facing the guide sleeve, and a sealing member is sleeved on the opening and closing member, and the sealing member is located between the guide sleeve and the injection member and closes the opening.

[0011] According to the fluid injection system of some embodiments of the first aspect of the utility model, the fluid injection system also includes a liquid inlet connector, the valve housing is provided with a first through hole connected to the mounting hole, the injection member is provided with a liquid storage cavity and a second through hole connected to the liquid storage cavity, and the liquid inlet connector is penetrated through the first through hole and the second through hole to be connected to the liquid storage cavity.

[0012] According to the fluid injection system of some embodiments of the first aspect of the utility model, a positioning protrusion is provided on the peripheral side surface of the injection member, and a positioning groove cooperating with the positioning protrusion is provided on the inner wall of the mounting hole.

[0013] According to the fluid injection system of some embodiments of the first aspect of the utility model, an annular protrusion is provided on the peripheral side of the injection member, and the annular protrusion can be slidably matched with the inner wall of the mounting hole.

[0014] According to the fluid injection system of some embodiments of the first aspect of the utility model, the fluid injection system also includes a driving mechanism arranged inside the valve housing, the driving mechanism includes a piezoelectric ceramic actuator and a stroke amplifier, the stroke amplifier includes a lever body and an elastic body, the lever body includes a rotating end, an amplifying end and a driving part, the rotating end and the amplifying end are located at opposite ends of the lever body, and the driving part is located between the rotating end and the amplifying end; one end of the elastic body is fixed and the other end is connected to the rotating end; when the driving part is subjected to a driving force, the elastic body can bend and deform so that the amplifying end rotates around the rotating end to amplify the stroke of the amplifying end; the piezoelectric ceramic actuator is connected to the driving part, the amplifying end is connected to the opening and closing part, and is used to drive the opening and closing part to close the injection port.

[0015] According to the fluid injection system of some embodiments of the first aspect of the utility model, the elastomer includes a compression spring part and a leaf spring part; the compression spring part includes a first fixed end and a first connecting end relative to each other, the first fixed end is fixedly arranged, and the first connecting end is connected to the rotating end; the leaf spring part includes a second fixed end and a second connecting end relative to each other, the second fixed end is fixedly arranged, the second connecting end is located on the side of the first connecting end away from the amplifying end, and is connected to the rotating end.

[0016] According to some embodiments of the second aspect of the utility model, the dispensing equipment includes the fluid injection system of the above-mentioned embodiment of the first aspect.

[0017] The dispensing equipment according to some embodiments of the second aspect of the utility model has at least the following beneficial effects:

[0018] By adopting the fluid injection system of the first embodiment, the risk of downtime caused by loosening of the locking cover can be reduced, thereby improving work efficiency.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 A front view of a fluid injection system according to an embodiment of the present utility model;

[0022] Figure 2 for Figure 1 a top view of the fluid injection system shown;

[0023] Figure 3 For fluid injection systems Figure 2 The cross-sectional view in the AA direction is shown in FIG.

[0024] Figure 4 for Figure 3 A partial enlarged view of the dotted circle area shown in B;

[0025] Figure 5 for Figure 4 The structural schematic diagram of the valve housing shown in;

[0026] Figure 6 for Figure 4 The structural schematic diagram of the nozzle body is shown in FIG.

[0027] Figure 7 for Figure 1 The structural schematic diagram of the travel amplifier is shown in.

[0028] Reference numerals:

[0029] Stroke amplifier 100; lever body 110; rotating end 111; amplifying end 112; second arc-shaped protrusion 1121; driving part 113; elastic body 120; compression spring part 121; first fixed end 1211; first connecting end 1212; leaf spring part 122; second fixed end 1221; second connecting end 1222; fixing part 130; valve housing 200; mounting hole 210; mounting groove 220; first through hole 230; connecting protrusion 240; positioning groove 250 ; injection member 300; injection port 310; liquid storage chamber 320; second through hole 330; positioning protrusion 340; annular protrusion 350; nozzle body 300a; nozzle member 300b; piezoelectric ceramic actuator 400; opening and closing member 500; abutment portion 510; elastic member 600; locking cover 700; connecting portion 710; pressing portion 720; avoidance port 721; guide sleeve 800; positioning groove 810; positioning column 820; sealing member 910; liquid inlet connector 920. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, left, right, front, back, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0034] The following is the attached Figure 1 To Attachment Figure 7 , describing the fluid injection system of the first embodiment of the utility model.

[0035] Reference Figures 1 to 5 According to some embodiments of the present invention, the fluid injection system includes a valve body, an elastic member 600, an opening and closing member 500 and a driving mechanism; wherein the valve body includes a valve housing 200, an injection member 300 and a locking cover 700; a mounting hole 210 is provided on the valve housing 200, and the injection member 300 can be slidably installed in the mounting hole 210, a liquid storage chamber 320 is formed inside the injection member 300 to store the fluid to be injected inside the injection member 300, and the injection member 300 is provided with an injection port 310 connected to the outside, and the injection port 310 is also connected to the liquid storage chamber 320 for spraying the fluid to be injected; the locking cover 700 includes a connecting portion 710 and a pressing portion 720, wherein the connecting portion 710 is arranged in an annular shape and is provided with a first thread, so that the connecting portion 710 can be connected to the second thread screw arranged around the mounting hole 210 on the valve housing 200 through the first thread The valve body 200 is connected with the valve body 200 by means of a groove, and the pressing part 720 is connected to one end of the connecting part 710 and is used to abut against the injection member 300 to press the injection member 300 and limit the injection member 300 from sliding along the mounting hole 210 and escaping from the valve housing 200; at the same time, in order to avoid affecting the fluid ejected from the injection port 310, the pressing part 720 is provided with an avoidance port 721 at a position corresponding to the injection port 310, so that the fluid ejected from the injection port 310 can be ejected from the avoidance port 721; the opening and closing member 500 and the driving mechanism are both arranged in the valve housing 200, and one end of the opening and closing member 500 is located inside the injection member 300, and the other end of the opening and closing member 500 is located outside the injection member 300 and is connected to the driving mechanism, so that the driving mechanism can drive the opening and closing member 500 to move, thereby enabling the opening and closing member 500 to approach and block the injection port 310, or move away from the injection port 310 to open the injection port 310. Exemplarily, one end of the opening and closing member 500 located inside the injection member 300 can extend to the vicinity of the injection port 310, so that the stroke of the opening and closing member 500 to open or block the injection port 310 can be reduced, and the responsiveness is higher. The elastic member 600 is also arranged in the valve housing 200, and the elastic member 600 is connected to the injection member 300; it should be understood that the elastic member 600 can be directly connected to the injection member 300, or indirectly connected to the injection member 300; and the elastic member 600 is in a deformed state so that the elastic member 600 can provide an elastic force that causes the injection member 300 to squeeze the locking cover 700.

[0036] It can be understood that by slidably mounting the injection member 300 in the mounting hole 210 and providing an elastic member 600 to give the injection member 300 an elastic force to squeeze the locking cover 700, the axial pressure between the locking cover 700 and the valve housing 200 can be increased, thereby increasing the positive pressure and static friction between the threads of the threaded connection between the two, thereby reducing the risk of the locking cover 700 rotating relative to the valve housing 200 and loosening due to the impact of the opening and closing member 500, so that the fluid injection system can adapt to long-term continuous operation and improve operating efficiency.

[0037] It is understandable that, referring to Figure 4 and Figure 5 In one embodiment, the valve housing 200 is formed with a connecting protrusion 240 protruding from the surface of the valve housing 200, and the mounting hole 210 is arranged on the connecting protrusion 240 and connected to the interior of the valve housing 200. At the same time, the second thread is an external thread arranged on the outer peripheral side of the connecting protrusion 240, and the first thread is an internal thread arranged on the inner peripheral side of the connecting part 710.

[0038] It should be understood that, in some other embodiments, the first thread may be an external thread, and the second thread may be an internal thread. For example, in one embodiment, the mounting hole 210 is configured as a two-stage stepped hole, and the first level of the mounting hole 210 close to the outer surface of the valve housing 200 is a connecting section with a larger aperture, and the first level of the mounting hole 210 directly connected to the interior of the valve housing 200 is a mounting section with a smaller aperture, wherein the mounting section is used to slidably cooperate with the peripheral side surface of the injection member 300, and the connecting section is used to connect with the connecting portion 710, that is, the inner wall of the connecting section is provided with a second thread for connecting to the first thread.

[0039] It is understood that in some of these embodiments, reference Figure 4 The opening and closing member 500 can be axially slidably arranged in the valve housing 200 along the mounting hole 210, and the driving mechanism abuts against the opening and closing member 500, and is used to drive the opening and closing member 500 to approach the injection port 310 to complete the closing of the injection port 310, and in order to enable the opening and closing member 500 to automatically reset, the elastic member 600 is a compression spring, and one end of the elastic member 600 is connected to the opening and closing member 500, and the other end is connected to the injection member 300, that is, the elastic member 600 is used to provide an elastic force that enables the injection member 300 to maintain the locking cover 700, and is also used to provide a reset force that enables the opening and closing member 500 to automatically move away from the injection port 310 to complete the reset (that is, the elastic force of the elastic member 600 is used to complete the opening and closing force of the injection port 310), thereby reducing the number of required elastic members 600.

[0040] It can be understood that in some of the embodiments, in order to facilitate the molding of the liquid storage chamber 320 in the injection member 300, the liquid storage chamber 320 is formed with an opening on the side close to the elastic member 600; and to guide the sliding of the opening and closing member 500, the fluid injection system also includes a guide sleeve 800, which can be slidably installed in the mounting hole 210 and is located on the side of the injection member 300 away from the locking cover 700; the opening and closing member 500 can be slidably penetrated in the guide sleeve 800, and one end enters into the interior of the injection member 300 through the above-mentioned opening; and the elastic member 600 is connected to the injection member 300 through the guide sleeve 800, that is, one end of the elastic member 600 is connected to the side of the guide sleeve 800 away from the injection member 300, so as to connect the injection member 300 through the guide sleeve 800.

[0041] For example, refer to Figure 4 In one embodiment, specifically, in order to facilitate the connection between the elastic member 600 and the driving mechanism, the end of the opening and closing member 500 away from the injection member 300 is provided with a circumferentially protruding abutting portion 510, and abuts with the driving mechanism through the abutting portion 510, and the elastic member 600 is sleeved on the opening and closing member 500, and one end of the elastic member 600 abuts on the abutting portion 510, and the other end of the elastic member 600 abuts on the side of the guide sleeve 800 away from the injection member 300; and, in order to prevent the elastic member 600 from radial movement, a positioning groove 810 is provided on the side of the guide sleeve 800 away from the injection member 300, and the groove bottom of the positioning groove 810 A positioning column 820 is provided which protrudes toward one side of the abutment portion 510. A compression spring is sleeved on the positioning column 820 and one end is embedded in the positioning groove 810. The positioning column 820 is adapted to the inner diameter of the compression spring. At the same time, in order to prevent the fluid to be injected in the injection member 300 from leaking out through the guide sleeve 800, a sealing member 910 is sleeved on the opening and closing member 500. The sealing member 910 is located between the guide sleeve 800 and the injection member 300, and closes the opening of the injection member 300 toward the side of the guide sleeve 800. Moreover, under the elastic force of the elastic member 600, the opposite ends of the injection member 300 and the guide sleeve 800 abut against the sealing member 910 at the same time.

[0042] It should be understood that the abutment portion 510 is preferably disc-shaped to better abut against the end of the compression spring.

[0043] It is understandable that, since the opening and closing member 500 needs to frequently collide with the injection port 310 of the injection member 300, the injection member 300 needs a higher fatigue strength at the injection port 310 than at other positions. Figure 4The injection member 300 includes a nozzle body 300a and a nozzle member 300b, wherein the nozzle member 300b is made of a metal material with relatively high strength and is connected to one end of the nozzle body 300a close to the locking cover 700, wherein the injection port 310 is arranged on the nozzle member 300b, thereby reducing the manufacturing cost of the injection member 300 while ensuring the strength requirement.

[0044] It should be understood that in some of the embodiments, the injection member 300 may also be integrally formed of a metal material with relatively high strength.

[0045] It is understood that in order to introduce the fluid to be sprayed into the liquid storage chamber 320 in the spray member 300, in some embodiments, reference is made to Figure 3-6 The fluid injection system further includes a liquid inlet connector 920 for connecting to a liquid supply device such as a glue barrel, and the valve housing 200 is provided with a first through hole 230 communicating with the mounting hole 210, and the injection member 300 is provided with a second through hole 330 communicating with the liquid storage chamber 320, and the liquid inlet connector 920 is provided on the surface of the valve housing 200, and is penetrated through the first through hole 230 and the second through hole 330, so that the liquid inlet connector 920 can communicate with the liquid storage chamber 320, and then the fluid to be injected in the liquid supply device can directly enter the liquid storage chamber 320 through the liquid inlet connector 920; it should be understood that in order to prevent the fluid to be injected (such as glue, etc.) from condensing in the injection member 300 after stopping the operation, After stopping the operation, the injection member 300 needs to be taken out of the valve housing 200 for cleaning. Compared with the form in which the liquid inlet connector 920 is connected to the outer surface of the valve housing 200 and directly connects to the liquid storage chamber 320 through the first through hole 230 and the second through hole 330, the fluid injection system of this embodiment will not have any residual fluid to be injected in the first through hole 230 after the liquid inlet connector 920 is removed. Therefore, after the injection member 300 is removed, there will be no situation in which the fluid to be injected in the first mounting hole 210 enters the mounting hole 210. Therefore, there is no need to clean the mounting hole 210 and the first through hole 230 in the valve housing 200, which is beneficial to improve the convenience of the cleaning process.

[0046] It is understandable that in order to enable the second through hole 330 to be quickly positioned relative to the first through hole 230 when the injection member 300 is installed, in some embodiments, reference is made to Figures 4 to 6, a positioning protrusion 340 is provided on the peripheral side surface of the injection member 300, and a positioning groove 250 is provided on the inner wall of the mounting hole 210 to cooperate with the positioning protrusion 340, so that when the injection member 300 is installed, the injection member 300 is inserted into the mounting hole 210 in a form in which the positioning protrusion 340 and the positioning groove 250 are opposite to each other, so that the second through hole 330 and the first through hole 230 are opposite and coaxial; it can be understood that, in order to facilitate the molding of the second through hole 330, in one embodiment, the second through hole 330 and the positioning protrusion 340 are opposite to each other. The protrusions 340 are all arranged on the nozzle body 300a, and the second through hole 330 is arranged on the positioning protrusion 340, and the first through hole 230 is also correspondingly connected to the positioning groove 250; and, in order to fix the liquid inlet connector 920, the second through hole 330 is a threaded hole, and the liquid inlet connector 920 is provided with an external thread that matches the thread; at the same time, in order to prevent the fluid to be injected from seeping out of the connection gap between the liquid inlet connector 920 and the injection member 300, a first sealing ring is also provided between the positioning protrusion 340 and the liquid inlet connector 920.

[0047] It is understandable that, in order to ensure that the injection member 300 can slide smoothly in the mounting hole 210, and then enable the injection member 300 to squeeze the locking cover 700 under the action of the elastic member 600, in some embodiments, an annular protrusion 350 is provided on the circumference of the injection member 300, and the annular protrusion 350 can be slidably matched with the inner wall of the mounting hole 210, thereby reducing the matching contact surface between the injection member 300 and the mounting hole 210, so as to reduce the friction between the injection member 300 and the mounting hole 210, and enable the elastic force generated by the elastic member 600 to be better transmitted to the locking cover 700. For example, referring to Figure 4 and Figure 6 In one embodiment, the outer diameter of the nozzle body 300a close to the guide sleeve 800 is larger than the outer diameter close to the locking cover 700, so that an annular protrusion 350 is formed on the side of the injection member 300 close to the guide sleeve 800, and the inner diameter of the mounting hole 210 is set to match the outer diameter of the annular protrusion 350.

[0048] It should be understood that the number of the annular protrusions 350 may not be limited to one. For example, in some other embodiments, a plurality of annular protrusions 350 arranged axially may be provided on the injection member 300 .

[0049] It is understandable that, depending on the type of fluid to be sprayed and the amount of a single spray, the opening and closing member 500 can be selected as a striker or a plunger. No specific limitation is made here, as long as the opening and closing of the injection port 310 can be completed under the cooperation of the driving mechanism and the elastic member 600.

[0050] It can be understood that in some of the embodiments, the driving mechanism adopts the piezoelectric ceramic actuator 400 as a power source, and because the driving stroke generated by the piezoelectric ceramic actuator 400 when working is small, in order to amplify the driving stroke so that the opening and closing member 500 can achieve the closing of the injection port 310 under the drive of the piezoelectric ceramic actuator 400, the driving mechanism also includes a stroke amplifier 100, the stroke amplifier 100 is arranged in the valve housing 200, and the stroke amplifier 100 has a driving part 113 and an amplifying end 112 that can achieve stroke amplification, the driving part 113 abuts against the piezoelectric ceramic actuator 400, and the amplifying end 112 is connected to the opening and closing member 500, so that when the piezoelectric ceramic actuator 400 is working, the power and motion can be transmitted to the stroke amplifier 100 through the driving part 113, and the stroke amplifier 100 can transmit the power and the amplified motion to the opening and closing member 500, so that the opening and closing member 500 is close to the injection port 310 to complete the closing of the injection port 310.

[0051] It is understood that in some of these embodiments, reference Figure 3 and Figure 7 The stroke amplifier 100 includes a lever body 110 and an elastic body 120 which are integrally connected to each other; wherein the lever body 110 is used to realize the amplification of the driving stroke, and includes a rotating end 111, an amplifying end 112 and a driving part 113; the rotating end 111 and the amplifying end 112 are located at opposite ends of the lever body 110, and the driving part 113 is located between the rotating end 111 and the amplifying end 112, and abuts against the piezoelectric ceramic actuator 400 to transmit the power and movement of the piezoelectric ceramic actuator 400 to the lever body 110; One end of the elastic body 120 is fixedly connected to the valve housing 200, and the other end is connected to the rotating end 111; the elastic body 120 is elastic, and when the driving part 113 is subjected to the driving force, the elastic member 600 can bend and deform under the action of the driving force and torque transmitted by the rotating end 111, so that the lever body 110 can rotate around the rotating end 111 connected to the elastic member 600, that is, the amplifying end 112 can rotate around the rotating end 111, so that the stroke of the amplifying end 112 can be several times the stroke of the driving part 113.

[0052] In some of the embodiments, the full-load driving stroke of the piezoelectric ceramic actuator 400 is approximately 32 microns, while the required movement stroke of the opening and closing member 500 is approximately 100 microns to 200 microns, and in order to protect the piezoelectric ceramic actuator 400, it is necessary to avoid making the piezoelectric ceramic actuator 400 work at full load; therefore, in order to meet the stroke requirement of the opening and closing member 500, when the distance from the connection point between the amplifying end 112 and the opening and closing member 500 to the rotating end 111 is L1, and the distance from the center of the driving part 113 (which can be regarded as the abutment point between the driving part 113 and the piezoelectric ceramic actuator 400) to the rotating end 111 is L2, then L1 is 5 to 9 times of L2, that is, the amplifier 100 is formed to amplify the driving stroke of the piezoelectric ceramic actuator 400 by 5 to 9 times.

[0053] It should be understood that, compared with the stroke amplification mechanism formed by the mutual contact of the lever, the rotating shaft and the return spring in the related art, the stroke amplifier 100 in this embodiment is configured by setting the lever body 110 constituting the lever and the elastic body 120 constituting the return spring into an integrated structure, and the rotating end 111 located at one end of the lever body 110 is connected to the elastic body 120. With the bending deformation ability of the elastic body 120, the lever body 110 can be rotated around the rotating end 111 when the driving part 113 is subjected to the driving force, so that the stroke of the amplification end 112 can be amplified relative to the stroke of the driving part 113; and when the driving force of the driving part 113 is removed, the lever body 110 can be rotated around the rotating end 111. After the power is applied, since the elastic body 120 will restore its deformation under the action of its own elasticity, it can drive the lever body 110 to rotate in the opposite direction around the rotating end 111 to complete the reset; at the same time, since the elastic body 120 is connected to the lever body 110 as a whole, when the lever body 110 is reset and rotated to pass the origin position under the action of inertia, the elastic body 120 will be able to provide an elastic force to hinder the lever body 110 from continuing to rotate, so as to reduce the angle that the lever body 110 can pass the origin position, and also enable the lever body 110 to quickly return to the origin position again under the action of the elastic force of the elastic body 120, so as to reduce the vibration of the lever body 110 and better adapt to relatively high-frequency operations. Therefore, the stroke amplifier 100 in this embodiment not only has a small number of parts, low cost, and is easy to install, but also has a small number of transmission contact points during the transmission process (the integrated stroke amplifier 100 no longer has any contact points inside due to the integrated connection), which can reduce the influence of unstable factors caused by too many transmission contact points, and can also effectively improve the oscillation problem caused by the lever resetting across the origin, thereby improving the stroke accuracy of the transmission process from multiple aspects.

[0054] It is understandable that in order to make the elastic body 120 bend and deform easily toward the side close to the enlarged end 112 when the driving part 113 is driven, in some embodiments, referring to Figure 7The elastic body 120 includes a compression spring portion 121 and a leaf spring portion 122, wherein the compression spring portion 121 is located on a side of the leaf spring portion 122 close to the enlarged end 112; wherein the compression spring portion 121 can be compressed under pressure, and the leaf spring portion 122 can be bent under torque; the compression spring portion 121 includes a first fixed end 1211 and a first connecting end 1212 opposite to each other, wherein the first fixed end 1211 is fixedly arranged, and the first connecting end 1212 is connected to the rotating end 111; the leaf spring portion 122 includes a second fixed end 1211 opposite to each other, and the first connecting end 1212 is connected to the rotating end 111; and the leaf spring portion 122 includes a second fixed end 1212 opposite to each other. 221 and the second connecting end 1222, the second fixed end 1221 is fixedly arranged, and the second connecting end 1222 is connected to the rotating end 111; it should be understood that by arranging the leaf spring portion 122 on one side of the compression spring portion 121, the two sides of the elastomer 120 can have different rigidities, so that the side of the elastomer 120 close to the enlarged end 112 is more easily compressed and deformed, that is, the elastomer 120 can bend as a whole toward the side close to the enlarged end 112 under the driving force and torque transmitted by the driving portion 113. Specifically, when the driving part 113 is subjected to the driving force, the rotating end 111 will apply a compressive force to the first connecting end 1212 of the compression spring part 121, and at the same time, will apply a bending moment to the second connecting end 1222 of the leaf spring part 122 toward the side of the driving part 113, so that the end of the elastic body 120 close to the enlarged end 112 can be compressed, while the side away from the enlarged end 112 is bent toward the enlarged end 112, that is, the elastic body 120 is bent and deformed as a whole toward the side close to the enlarged end 112, so that the enlarged end 112 is rotated by a certain angle equivalent to the rotating end 111; and when the driving force of the driving part 113 is removed, the compression spring part 121 stretches and recovers under its own elastic force, and the leaf spring part 122 straightens under its own elastic force, so that the lever body 110 rotates in the opposite direction to complete the reset.

[0055] It is understandable that in some embodiments, in order to facilitate the fixing of the first fixing end 1211 and the second fixing end 1221, the stroke amplifier 100 includes a fixing portion 130, the first fixing end 1211 and the second fixing end 1221 are connected to the fixing portion 130, and are fixed to the valve housing 200 through the fixing portion 130; for example, referring to Figure 3 In one embodiment, a mounting groove 220 is provided in the valve housing 200 , and the fixing portion 130 is fixedly installed in the mounting groove 220 by means of interference fit, so as to fix the first fixing end 1211 and the second fixing end 1221 .

[0056] It should be understood that in some other embodiments, fasteners such as bolts may be selected to connect the fixing portion 130 to the valve housing 200, and the manner in which the fixing portion 130 is fixed to the valve housing 200 is not specifically limited herein.

[0057] The following describes some embodiments of the second aspect of the present invention, and the dispensing equipment of this embodiment includes the fluid injection system of the embodiment of the first aspect. It should be understood that the dispensing equipment of this embodiment can reduce the risk of downtime caused by loosening of the locking cover 700 by adopting the fluid injection system of the embodiment of the first aspect, thereby improving work efficiency.

[0058] It should be understood that in some of the embodiments, the dispensing equipment also includes a moving mechanism, and the fluid injection system is fixedly mounted on the moving mechanism through a connecting block connected to the valve housing 200, and can move under the drive of the moving mechanism, thereby driving the fluid injection system to move to a designated position for dispensing operations.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A fluid injection system, characterized in that: include: A valve housing is provided with a mounting hole; An injection member is slidably mounted in the mounting hole; A locking cover, threadedly connected to the valve housing and pressing the injection member to prevent the injection member from escaping from the valve housing; An elastic member is arranged in the valve housing and located on one side of the injection member. The elastic member is used to provide an elastic force for the injection member to squeeze the locking cover.

2. A fluid injection system according to claim 1, characterized in that: The fluid injection system further includes an opening and closing member, which is slidably disposed in the valve housing along the axial direction of the mounting hole, and one end of the opening and closing member is located in the injection member, and the injection port of the injection member can be opened or closed by sliding the opening and closing member; The elastic member is a compression spring, one end of which is connected to the opening and closing member, and the other end of which is connected to the injection member.

3. A fluid injection system according to claim 2, characterized in that: The fluid injection system also includes a guide sleeve, which can be slidably installed in the installation hole and is located on the side of the injection member away from the locking cover. The opening and closing member can be slidably inserted into the guide sleeve, and one end of the elastic member is connected to the side of the guide sleeve away from the injection member to connect the injection member through the guide sleeve.

4. A fluid injection system according to claim 3, characterized in that: The injection member is provided with a liquid storage cavity inside, and an opening is formed on the side of the injection member facing the guide sleeve. A sealing member is sleeved on the opening and closing member, and the sealing member is located between the guide sleeve and the injection member and closes the opening.

5. A fluid injection system according to claim 1, characterized in that: The fluid injection system also includes a liquid inlet connector, the valve housing is provided with a first through hole connected to the mounting hole, the injection member is provided with a liquid storage cavity and a second through hole connected to the liquid storage cavity, and the liquid inlet connector is penetrated through the first through hole and the second through hole to be connected to the liquid storage cavity.

6. A fluid injection system according to claim 5, characterized in that: A positioning protrusion is arranged on the peripheral side surface of the injection member, and a positioning groove matching with the positioning protrusion is arranged on the inner wall of the mounting hole.

7. A fluid injection system according to claim 1, characterized in that: An annular protrusion is arranged on the peripheral side of the injection member, and the annular protrusion can be slidably matched with the inner wall of the mounting hole.

8. A fluid injection system according to any one of claims 2 to 4, characterized in that: The fluid injection system also includes a driving mechanism arranged inside the valve housing, the driving mechanism includes a piezoelectric ceramic actuator and a stroke amplifier, the stroke amplifier includes a lever body and an elastic body, the lever body includes a rotating end, an amplifying end and a driving part, the rotating end and the amplifying end are located at opposite ends of the lever body, and the driving part is located between the rotating end and the amplifying end; one end of the elastic body is fixed and the other end is connected to the rotating end; when the driving part is subjected to a driving force, the elastic body can bend and deform so that the amplifying end rotates around the rotating end to amplify the stroke of the amplifying end; the piezoelectric ceramic actuator is connected to the driving part, the amplifying end is connected to the opening and closing part, and is used to drive the opening and closing part to close the injection port.

9. The fluid ejection system according to claim 8, wherein: The elastic body includes a compression spring portion and a leaf spring portion; the compression spring portion includes a first fixed end and a first connecting end relative to each other, the first fixed end is fixedly arranged, and the first connecting end is connected to the rotating end; the leaf spring portion includes a second fixed end and a second connecting end relative to each other, the second fixed end is fixedly arranged, the second connecting end is located on a side of the first connecting end away from the amplifying end, and is connected to the rotating end.

10. A dispensing device, characterized in that: The invention comprises a fluid spraying system as claimed in any one of claims 1 to 9.

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