Piezoelectric injection valve

Abstract

The invention provides a piezoelectric injection valve. The piezoelectric injection valve comprises a valve body, a flow channel assembly, a quick-change part, a matching assembly and a locking assembly. A runner hole extending in the first direction is formed in the valve body, the runner assembly is partially detachably arranged in the runner hole, and a stop structure is arranged on the side, facing the valve body, of the part, abutting against the bottom of the valve body, of the runner assembly. A hinge shaft extending in the first direction is arranged at the bottom of the valve body, and the quick-change piece is hinged to the hinge shaft. The quick-change part is used for supporting the flow channel assembly and limiting the flow channel assembly to move in the first direction; the matching assembly comprises a first matching piece capable of stretching out and drawing back in the third direction, the quick-change piece is used for being locked with the first matching piece to limit the quick-change piece to rotate around the first direction, and the third direction is perpendicular to the first direction; the locking assembly comprises a locking piece capable of stretching out and drawing back in the first direction, and the locking piece is used for being locked with the stopping structure and limiting the runner assembly to rotate around the first direction. The runner assembly can be quickly disassembled and assembled, and reverse rotation of the quick-change part can be prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection valves, in particular, the present application relates to a piezoelectric injection valve. BACKGROUND

[0002] At present, piezoelectric injection valves are widely used in high-precision, high-quality micro-viscous fluid dispensing industry. However, in the disassembly process of the flow channel in the piezoelectric injection valve, the screws fixed between the flow channel assembly and the valve body need to be disassembled first. The disassembly of the screws increases the time and cost required, therefore, the existing flow channel assembly is difficult to disassemble, the efficiency is low, and the maintenance and repair time of the equipment is increased. SUMMARY

[0003] The present application aims at the shortcomings of the prior art, and provides a piezoelectric injection valve to solve the technical problems of difficult disassembly of the flow channel assembly, low efficiency, and increased maintenance and repair time of the equipment.

[0004] The piezoelectric injection valve provided by the embodiment of the present application comprises: a valve body, a flow channel hole extending in a first direction is formed in the valve body, and a hinge shaft extending in the first direction is arranged at the bottom of the valve body; a flow channel assembly, part of the flow channel assembly is detachably arranged in the flow channel hole, and a part of the flow channel assembly abutting against the bottom of the valve body is provided with a stop structure on the side of the valve body; a quick-change part, which is hinged with the hinge shaft and used for supporting the flow channel assembly and limiting the movement of the flow channel assembly in the first direction; a matching assembly arranged at the bottom of the valve body, comprising a first matching part which can be extended and retracted in a third direction, the quick-change part is used for locking with the first matching part to limit the rotation of the quick-change part around the first direction, and the third direction is perpendicular to the first direction; a locking assembly, comprising a locking part which can be extended and retracted in the first direction, and used for locking with the stop structure to limit the rotation of the flow channel assembly around the first direction.

[0005] Optionally, the locking assembly further comprises a driving part, one end of the driving part extends into the valve body and is configured to move in a direction perpendicular to the first direction, and the locking part is provided with a first driving inclined surface at the contact end abutting against the driving part.

[0006] Optionally, the driving part extends in a second direction to drive the extension and retraction of the locking part and the first matching part, the first matching part is provided with a second driving inclined surface at the contact end abutting against the driving part, and the second direction is perpendicular to the first direction and the third direction.

[0007] Optionally, the driving member is threadedly connected to the side wall of the valve body, and the locking assembly further includes a rotating seat connected to one end of the driving member exposed from the valve body.

[0008] Optionally, the quick-change component includes a side plate body, a positioning plate and a limiting plate, and a clamping channel for clamping the flow channel assembly is formed between the positioning plate and the limiting plate; When the quick-change part and the mating component are locked, the side plate body abuts against one side of the flow channel component, the positioning plate abuts against the bottom of the flow channel component, and the flow channel component is clamped and limited in the clamping channel to locate the locking position of the quick-change part.

[0009] Optionally, when the quick-change part and the mating component are locked, the limit plate approaches or contacts the side of the valve body away from the hinge shaft, and a first locking groove for locking the first mating part is provided on the wall surface of the limit plate facing the hinge shaft.

[0010] Optionally, the positioning plate is provided with a second locking member or a second locking hole extending along the second direction; The mating assembly also includes a locking plate extending along the first direction, and a second locking hole mating with the second locking piece is provided on the locking plate, or a second locking piece mating with the second locking hole, and the second locking piece is used to combine with the second locking hole to limit the freedom of the quick-change piece, and the second direction is perpendicular to the first direction and the third direction.

[0011] Optionally, a first limiting member is provided on the side plate body, and a first limiting groove is provided at the bottom of the valve body to cooperate with the first limiting member when the quick-change member is locked with the matching component.

[0012] Optionally, the flow channel assembly includes vertically arranged vertical strikers and flow channel functional components, and some of the vertical strikers are used to plug and cooperate with the flow channel holes; and the positioning plate is provided with an avoidance opening for the part of the vertical striker located outside the flow channel hole to pass through.

[0013] Optionally, the piezoelectric injection valve further includes at least one of the following: The locking member and the first matching member include elastic beads; The side plate body is provided with a mounting block.

[0014] The beneficial technical effects brought about by the technical solutions provided in the embodiments of the present application include: In the embodiment of the present application, a first mating piece and a quick-change piece that can rotate around a first direction and is locked with the first mating piece are provided at the bottom of the valve body. After the flow channel assembly and the valve body are initially positioned, the freedom of the flow channel assembly to move along a second direction and a third direction perpendicular to the first direction is restricted, and the freedom of the flow channel assembly other than sliding along the first direction and rotating around the first direction is restricted. Thereafter, the quick-change piece can be locked with the mating piece provided at the bottom of the valve body by rotating. The quick-change piece can support the flow channel assembly and restrict the freedom of the flow channel assembly to move along the first direction. After the quick-change piece is locked with the first mating piece extending along the third direction, the freedom of the quick-change piece to rotate around the first direction can be restricted, thereby ensuring that the quick-change piece can achieve stable and reliable limiting. Furthermore, the embodiment of the present application does not require the provision of additional accessories independent of the valve body to cooperate with the quick-change component, thereby enabling rapid locking of the flow channel assembly and reducing the size of the quick-change component. Furthermore, by providing a locking member that can be extended and retracted along the first direction at the bottom of the valve body, after the mating assembly and the quick-change member are locked, the locking member abuts against the flow channel assembly and abuts against the side of the stopping structure away from the valve body, thereby limiting the rotation of the flow channel assembly around the axis, and further reducing the rotation of the quick-change member around the axis under the action of external force, playing an anti-rotation role, and ensuring the installation stability of the flow channel assembly.

[0015] Additional aspects and advantages of the present application will be given in part in the following description, which will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which: Figure 1 A schematic structural diagram of a partial cross-section of a first matching component of a piezoelectric injection valve provided in an embodiment of the present application; Figure 2 A schematic structural diagram of a partial cross-section of a first locking groove of a piezoelectric injection valve provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of the valve body provided in an embodiment of the present application; Figure 4 A schematic diagram of the explosion structure of a piezoelectric injection valve provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of the driving member provided in an embodiment of the present application driving the locking member; Figure 6 A schematic diagram of the installation structure of the locking assembly provided in an embodiment of the present application on the valve body; Figure 7 This is a flow chart for installing the piezoelectric injection valve provided in an embodiment of the present application. Description of reference numerals: 10-valve body; 11-flow channel hole; 12-first limit groove; 13-hinge shaft; 20-flow channel assembly; 21-vertical striker; 22-flow channel functional component; 221-stop structure; 222-wedge block; 30-quick change member; 31-side panel body; 311-first stopper; 32-positioning plate; 321-avoidance opening; 322-second locking member; 33-stopper plate; 331-first locking groove; 35-clamping channel; 36-mounting block; 40-mating assembly; 41-first mating piece; 42-locking plate; 421-second locking hole; 50-locking assembly; 51-locking member; 511-first driving inclined surface; 52-driving member; 53-rotating seat. DETAILED DESCRIPTION

[0017] The following describes the embodiments of the present application in conjunction with the accompanying drawings. It should be understood that the embodiments described below in conjunction with the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0018] Those skilled in the art will understand that, unless otherwise stated, the terms "said" and "the" used herein may also include plural forms. It should be further understood that the term "including" used in the specification of this application refers to the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the implementation of other features, information, data, steps, operations, elements, components and / or combinations thereof supported by the technical field. The term "and / or" used herein refers to at least one of the items defined by the term, for example, "A and / or B" can be implemented as "A", or as "B", or as "A and B".

[0019] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0020] In order to solve the technical problems existing in the related art such as difficulty in disassembling and assembling road components, low efficiency, and increased repair and maintenance time of equipment, the embodiment of the present application provides a new form of piezoelectric injection valve.

[0021] Reference Figure 1-Figure 7 The piezoelectric injection valve of the embodiment of the present application includes a valve body 10, a flow channel assembly 20, a quick-change component 30, a matching component 40 that cooperates with the quick-change component 30 to limit the flow channel assembly 20, and a locking component 50.

[0022] The valve body 10 is internally provided with a flow channel hole 11 extending along the first direction, and the flow channel assembly 20 is partially detachably arranged in the flow channel hole 11. The part of the flow channel assembly 20 abutting against the bottom of the valve body 10 is provided with a stop structure 221 on the side of the valve body 10. The bottom of the valve body 10 is provided with a hinge shaft 13 extending along the first direction, and the quick-change piece 30 is hinged to the hinge shaft 13. The quick-change piece 30 is used to support the flow channel assembly 20 and limit the movement of the flow channel assembly 20 along the first direction.

[0023] The cooperation assembly 40 is arranged at the bottom of the valve body 10 and includes a first cooperation piece 41 which can extend and retract along the third direction. The quick-change piece 30 is used to be locked with the first cooperation piece 41 to limit the rotation of the quick-change piece 30 around the first direction, and the third direction is perpendicular to the first direction. The locking assembly 50 includes a locking piece 51 which can extend and retract along the first direction and is used to be locked with the stop structure 221 to limit the rotation of the flow channel assembly 20 around the first direction.

[0024] In the embodiment of the present application, after the flow channel assembly 20 is inserted into the flow channel hole 11 and preliminarily positioned with the valve body 10, the flow channel hole 11 can limit the radial movement of the flow channel assembly 20 along the flow channel hole 11, i.e., limit the degrees of freedom of the flow channel assembly 20 moving along the second direction and the third direction which are perpendicular to the first direction, and limit the degrees of freedom of the flow channel assembly 20 except sliding along the first direction and rotating around the first direction. Then, the quick-change piece 30 can be locked with the cooperation assembly 40 arranged at the bottom of the valve body 10 by rotating the quick-change piece 30. The quick-change piece 30 can support the flow channel assembly 20 and limit the degrees of freedom of the flow channel assembly 20 moving along the first direction. After the quick-change piece 30 is locked with the first cooperation piece 41 extending along the third direction, the degrees of freedom of the quick-change piece 30 rotating around the first direction can be limited, so that the quick-change piece 30 can realize stable and reliable limiting.

[0025] Moreover, the embodiment of the present application does not need to arrange an additional accessory independent of the valve body 10 to cooperate with the quick-change piece 30, so that the quick-change piece 30 can be quickly locked, and the volume of the quick-change piece 30 can be reduced.

[0026] Further, after the cooperation assembly 40 and the quick-change piece 30 are locked, the locking piece 51 extending along the first direction is arranged at the bottom of the valve body 10, so that the locking piece 51 is locked with the stop structure 221 on the flow channel assembly 20, thereby limiting the rotation of the flow channel assembly 20 around the shaft, further reducing the rotation of the quick-change piece 30 around the shaft under external force, playing a role of anti-rotation, and guaranteeing the installation stability of the flow channel assembly 20.

[0027] In an alternative embodiment, referring to Figure 4The stopping structure 221 includes a stopping groove provided at a corresponding position of the flow channel assembly 20, and the flow channel assembly 20 is restricted from rotating around the axis by controlling the end of the locking member 51 to be stuck in the stopping groove.

[0028] In another optional embodiment, the stopping structure 221 includes a stopping block, which can limit the axial rotation of the flow channel assembly 20 by controlling the locking member 51 to extend and abut against the side of the stopping block away from the valve body 10.

[0029] The embodiment of the present application is described by taking as an example the blocking groove for cooperating with the locking member 51 provided at the corresponding position of the flow channel assembly 20 .

[0030] Optionally, refer to Figure 4 The hinge shaft 13 of the present application is fixed by an L-shaped plate fixed to the bottom of the valve body 10, and the quick-change part 30 is provided with a ring sleeved outside the hinge shaft 13 to realize the rotational connection between the quick-change part 30 and the valve body 10.

[0031] Optionally, refer to Figure 5 The locking assembly 50 also includes a driving member 52, one end of which extends into the valve body 10 and is constructed to be movable in a direction perpendicular to the first direction. The contact end of the locking member 51 for abutting against the driving member 52 is provided with a first driving inclined surface 511.

[0032] In the embodiment of the present application, the driving member 52 is arranged perpendicular to the locking member 51. A first driving inclined surface 511 is provided at the end of the locking member 51, and the first driving inclined surface 511 gradually rises along the extension and retraction direction of the driving member 52. Therefore, the present application can extend and retract the driving member 52 so that the driving member 52 gradually abuts the first driving inclined surface 511, thereby driving the locking member 51 to slide along the first direction toward the bottom of the valve body 10 until the locking member 51 abuts against a side of the flow channel assembly 20 facing the valve body 10 and abuts against the side of the stop structure 221 away from the valve body 10, thereby limiting the rotation of the flow channel assembly 20 around the axis, thereby preventing the quick-change member 30 from loosening due to vibration or rotation of the flow channel assembly 20, and improving the stability of the locking between the quick-change member 30 and the mating assembly 40.

[0033] Optionally, the driving member 52 extends along the second direction to drive the locking member 51 and the first mating member 41 to extend and retract. The contact end of the first mating member 41 for abutting against the driving member 52 is provided with a second driving inclined surface. The second direction is perpendicular to the first direction and the third direction.

[0034] In the embodiment of the present application, the driving member 52, the locking member 51 and the first matching member 41 are arranged vertically in pairs, and a first driving inclined surface 511 is provided at the contact end of the locking member 51, and a second driving inclined surface is provided at the contact end of the first matching member 41, so that when the driving member 52 is moved, the first matching member 41 can be driven to extend and retract along the third direction and the locking member 51 can be driven to extend and retract along the first direction at the same time, and the axial rotation of the flow channel assembly 20 and the axial rotation of the quick-change member 30 can be locked at the same time, which can further improve the quick installation efficiency of the flow channel assembly 20.

[0035] In this application, the first direction is defined as the Z-axis, the second direction is defined as the Y-axis, and the third direction is defined as the X-axis. The plane formed by the X-axis and the Y-axis is defined as the first plane, the plane formed by the Y-axis and the Z-axis is defined as the second plane, and the plane formed by the X-axis and the Z-axis is defined as the third plane. In this application, the quick-change component 30 rotates within the first plane, and the first mating component 41 expands and contracts within the third plane, so that when the first mating component 41 is engaged with the quick-change component 30, it can limit the rotation of the quick-change component 30, thereby preventing the quick-change component 30 from rotating in the opposite direction under the action of external force after being locked with the mating component 40.

[0036] Optionally, refer to Figure 5-Figure 6 The driving member 52 is threadedly connected to the side wall of the valve body 10 , and the locking assembly 50 further includes a rotating seat 53 connected to one end of the driving member 52 exposed from the valve body 10 .

[0037] In the embodiment of the present application, the driving member 52 is threadedly connected to the valve body 10, which has a relatively simple structure and avoids occupying too much space inside the valve body 10. By rotating the driving member 52, the extension amount of the driving member 52 inside the valve body 10 can be controlled, thereby improving the feeding accuracy of the driving member 52.

[0038] Optionally, the driving member 52 may be a ball plunger.

[0039] Optionally, refer to Figure 2-Figure 4 The quick-change component 30 includes a side plate body 31, a positioning plate 32, and a stop plate 33. A clamping channel 35 for clamping the flow channel assembly 20 is formed between the positioning plate 32 and the stop plate 33. When the quick-change component 30 and the mating assembly 40 are locked, the side plate body 31 abuts one side of the flow channel assembly 20, and the positioning plate 32 abuts the bottom of the flow channel assembly 20. The flow channel assembly 20 is clamped and retained within the clamping channel 35, thereby positioning the quick-change component 30 in the locked position.

[0040] In the embodiment of the present application, the side panel body 31 extends along a first plane, and the positioning plate 32 and the limiting plate 33 extend along a second plane, such that the positioning plate 32 and the limiting plate 33 are both perpendicular to the side panel body 31. The limiting plate 33 is disposed at the end of the side panel body 31 away from the hinge shaft 13, and the limiting plate 33 is disposed on the side of the positioning plate 32 close to the valve body 10, so that a U-shaped clamping channel 35 is formed between the limiting plate 33 and the positioning plate 32. When the quick-change component 30 is locked with the mating component 40, the positioning plate 32 abuts the bottom of the flow channel assembly 20 to support the flow channel assembly 20 and limit the sliding of the flow channel assembly 20 in the first direction. The side panel body 31 abuts the side of the flow channel assembly 20 to prevent the flow channel assembly 20 from rotating around the axis in the first plane. The clamping channel 35 clamps the flow channel assembly 20, which can limit the horizontal movement of the flow channel assembly 20 along the second plane and prevent the flow channel assembly 20 from rotating in the first plane.

[0041] Optionally, refer to Figure 1-Figure 2 , Figure 1 The structure at A is a partial cross-sectional view of the first matching member 41 and the limiting plate 33 when locked; Figure 2 The structure at B is a partial cross-sectional view of the first locking groove 33 on the stop plate 33. When the quick-change member 30 and the mating assembly 40 are locked, the stop plate 33 approaches or contacts the side of the valve body 10 away from the hinge axis 13. A first locking groove 331 for locking the first mating member 41 is defined on the wall of the stop plate 33 facing the hinge axis 13.

[0042] The first locking groove 331 also extends along the third direction. When the quick-change part 30 is rotated so that the flow channel assembly 20 is clamped in the clamping channel 35, the limit plate 33 is close to the side of the valve body 10 away from the hinge shaft 13. At this time, by extending the first mating part 41 and clamping it into the first locking groove 331, the quick-change part 30 can be restricted from rotating in the first plane.

[0043] Optionally, the locking member 51 and the first matching member 41 include elastic beads.

[0044] Optionally, refer to Figure 2-Figure 4 The positioning plate 32 is provided with a second locking member 322 or a second locking hole 421 extending in the second direction. The mating assembly 40 further includes a locking plate 42 extending in the first direction. The locking plate 42 is provided with a second locking hole 421 mating with the second locking member 322 or a second locking member 322 mating with the second locking hole 421. The second locking member 322 is used to engage with the second locking hole 421 to limit the freedom of the quick-change member 30. The second direction is perpendicular to the first direction and the third direction.

[0045] In the embodiment of the present application, the hinge shaft 13 and the quick-change member 30 are arranged on the first side of the valve body 10, and the locking plate 42 is located on the second side of the valve body 10, and the locking plate 42 is parallel to the third plane. After the flow channel assembly 20 and the flow channel hole 11 are initially positioned, the locking plate 42 abuts against the second side of the flow channel assembly 20, and the quick-change member 30 is rotatably arranged on the first side of the flow channel assembly 20. By designing a second locking member 322 or a second locking hole 421 extending in the second direction on the positioning plate 32, the quick-change member 30 and the locking plate 42 are plugged and matched, ensuring that the positioning plate 32 has a stable and reliable supporting force on the flow channel assembly 20, and can limit the locking position of the quick-change member 30 to prevent the quick-change member 30 from continuing to rotate around the axis and causing squeezing of the flow channel assembly 20.

[0046] Optionally, the second locking member 322 may be a protrusion designed on the positioning plate 32 .

[0047] Optionally, refer to Figure 4 A first limiting member 311 is provided on the side plate body 31, and a first limiting groove 12 is opened at the bottom of the valve body 10 to cooperate with the first limiting member 311 when the quick-change member 30 and the matching component 40 are locked.

[0048] In the embodiment of the present application, by forming a pair of locking structures between the side plate body 31 and the valve body 10, the quick-change part 30 and the valve body 10 can be fully locked, thereby ensuring the locking effect of the quick-change part 30 and the valve body 10.

[0049] Optionally, refer to Figure 4 The flow channel assembly 20 includes vertical strikers 21 and flow channel functional components 22 arranged vertically. Part of the vertical strikers 21 is used to plug and cooperate with the flow channel hole 11. The positioning plate 32 is provided with an avoidance opening 321 for the part of the vertical striker 21 located outside the flow channel hole 11 to pass through.

[0050] Optionally, refer to Figure 4 The avoidance opening 321 can be a through opening, thereby dividing the positioning plate 32 into at least two. The avoidance opening 321 can also be a non-through U-shaped opening. When the quick-change component 30 and the mating assembly 40 are locked, the avoidance opening 321 can also prevent the flow channel assembly 20 from rotating about the axis, further reducing the possibility of the quick-change assembly rotating about the axis.

[0051] Optionally, refer to Figure 4The side of the flow channel functional component 22 towards the valve body 10 is further provided with a wedge 222, which abuts against the bottom of the valve body 10 when the vertical plunger 21 is inserted into the flow channel hole 11, and can ensure that the flow channel functional component 22 is tightly abutted against the positioning plate 32 and tightly clamped in the clamping channel 35 after the quick-change piece 30 is locked with the cooperating assembly 40, thereby limiting the movement of the flow channel assembly 20 in the third plane and ensuring the installation stability of the flow channel assembly 20.

[0052] Optionally, referring to Figure 2 The side plate body 31 is provided with a mounting block 36, which can be held by an operator to drive the quick-change piece 30 to rotate, thereby improving the disassembly and assembly efficiency of the flow channel assembly 20.

[0053] Referring to Figure 7 The quick installation process of the piezoelectric injection valve provided by the application includes the following steps. Before the flow channel assembly 20 is installed, the quick-change piece 30 is rotated to be perpendicular to the valve body 10, and the vertical plunger 21 is aligned with the flow channel hole 11 of the valve body 10.

[0054] Then, the vertical plunger 21 is inserted into the flow channel hole 11 to preliminarily position the flow channel assembly 20 and the valve body 10.

[0055] Then, the mounting block 36 is held to rotate the quick-change piece 30, so that the positioning plate 32 supports the bottom of the flow channel functional component 22, the bottom of the vertical plunger 21 is limited in the avoiding opening 321, the limiting plate 33 is close to the side of the valve body 10 away from the hinge shaft 13, so that the flow channel functional component 22 is limited in the clamping channel 35, and the wedge 222 is tightly abutted against the bottom of the valve body 10 under the extrusion of the positioning plate 32 on the flow channel functional component 22.

[0056] Finally, the rotating seat 53 is rotated to drive the driving piece 52 to gradually approach the contact end of the locking piece 51 and the first cooperating piece 41, so that the locking piece 51 is extended in the first direction and clamped into the stop groove at the top of the flow channel functional component 22 to limit the rotation of the flow channel assembly 20 around the shaft, and the first cooperating piece 41 is extended in the third direction to be clamped into the first locking groove 331 of the limiting plate 33 to limit the rotation of the quick-change piece 30 around the shaft, thereby completing the quick locking of the flow channel assembly 20 and ensuring the installation stability of the flow channel assembly 20.

[0057] The technical scheme provided by the embodiment of the application has the following beneficial technical effects: By arranging a first mating piece 41 and a quick-change piece 30 that can rotate around a first direction and is locked with the first mating piece 41 at the bottom of the valve body 10, after the flow channel assembly 20 is inserted into the flow channel hole 11 and the valve body 10 is initially positioned, the flow channel hole 11 can limit the radial movement of the flow channel assembly 20 along the flow channel hole 11, that is, limit the freedom of the flow channel assembly 20 to move in the second direction and the third direction perpendicular to the first direction, and limit the freedom of the flow channel assembly 20 except sliding along the first direction and rotating around the first direction; thereafter, the quick-change piece 30 can be locked with the mating piece 40 arranged at the bottom of the valve body 10 by rotating, the quick-change piece 30 can support the flow channel assembly 20, limit the freedom of the flow channel assembly 20 to move along the first direction, and after the quick-change piece 30 is locked with the first mating piece 41 extending along the third direction, the freedom of the quick-change piece 30 to rotate around the first direction can be limited, thereby ensuring that the quick-change piece 30 can achieve stable and reliable limiting. Furthermore, by providing a locking member 51 that can be extended and retracted along the first direction at the bottom of the valve body 10, after the mating component 40 and the quick-change component 30 are locked, the locking member 51 is locked with the stopping structure 221 on the flow channel component 20, thereby limiting the rotation of the flow channel component 20 around the axis, and further reducing the rotation of the quick-change component 30 around the axis under the action of external force, playing an anti-rotation role, and ensuring the installation stability of the flow channel component 20.

[0058] The piezoelectric injection valve of the present application does not require additional accessories independent of the valve body 10 to cooperate with the quick-change component 30, making assembly more convenient. Furthermore, the locking structure of the embodiment of the present application is relatively simple and compact, enabling rapid locking of the flow channel assembly 20 while avoiding excessive space occupation at the bottom of the valve body 10.

[0059] By arranging the driving member 52, the locking member 51 and the first matching member 41 vertically in pairs, and providing a first driving inclined surface 511 at the contact end of the locking member 51, and providing a second driving inclined surface at the contact end of the first matching member 41, when the driving member 52 is moved, it can simultaneously drive the first matching member 41 to extend and retract along the third direction and drive the locking member 51 to extend and retract along the first direction, and at the same time lock the axial rotation of the flow channel assembly 20 and the axial rotation of the quick-change member 30, thereby further improving the quick installation efficiency of the flow channel assembly 20.

[0060] In the description of the present application, the directions or positional relationships indicated by words such as "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the exemplary directions or positional relationships shown in the accompanying drawings. They are for the convenience of describing or simplifying the description of the embodiments of the present application, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0061] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0062] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0063] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0064] The above is only part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the solution of the present application, other similar implementation methods based on the technical ideas of the present application also fall within the protection scope of the embodiments of the present application.

Claims

1. A piezoelectric injection valve, characterized in that: include: A valve body is provided with a flow channel hole extending in a first direction, and a hinge shaft extending in the first direction is provided at the bottom of the valve body; A flow channel component is partially detachably disposed in the flow channel hole, and a portion of the flow channel component abutting against the bottom of the valve body is provided with a stop structure on a side facing the valve body; a quick-change member, hinged to the hinge shaft, and used to support the flow channel assembly and limit the movement of the flow channel assembly along the first direction; a mating assembly, disposed at the bottom of the valve body, comprising a first mating piece that is retractable along a third direction, the quick-change piece being configured to lock with the first mating piece to restrict the quick-change piece from rotating in a first direction, the third direction being perpendicular to the first direction; The locking assembly includes a locking member that can be extended and retracted along a first direction and is used to lock with the blocking structure to limit the flow channel assembly from rotating around the first direction.

2. The piezoelectric injection valve according to claim 1, characterized in that The locking assembly further includes a driving member, one end of which extends into the valve body and is configured to be movable in a direction perpendicular to the first direction, and a first driving inclined surface is provided on a contact end of the locking member for abutting against the driving member.

3. The piezoelectric injection valve according to claim 2, characterized in that The driving member extends along the second direction for driving the locking member and the first matching member to extend and retract. The contact end of the first matching member for abutting against the driving member is provided with a second driving inclined surface. The second direction is perpendicular to the first direction and the third direction.

4. The piezoelectric injection valve according to claim 2, characterized in that The driving member is threadedly connected to the side wall of the valve body, and the locking assembly further includes a rotating seat connected to the driving member and exposed at one end of the valve body.

5. The piezoelectric injection valve according to claim 1, characterized in that The quick-change component includes a side plate body, a positioning plate and a limiting plate, wherein a clamping channel for clamping the flow channel assembly is formed between the positioning plate and the limiting plate; When the quick-change part and the mating component are locked, the side plate body abuts against one side of the flow channel component, the positioning plate abuts against the bottom of the flow channel component, and the flow channel component is clamped and limited in the clamping channel to locate the locking position of the quick-change part.

6. The piezoelectric injection valve according to claim 5, characterized in that When the quick-change part and the mating component are locked, the limit plate approaches or contacts the side of the valve body away from the hinge shaft, and a first locking groove for locking the first mating part is provided on the wall surface of the limit plate facing the hinge shaft.

7. The piezoelectric injection valve according to claim 5, characterized in that The positioning plate is provided with a second locking member or a second locking hole extending along the second direction; The mating assembly also includes a locking plate extending along the first direction, and a second locking hole mating with the second locking piece is provided on the locking plate, or a second locking piece mating with the second locking hole, and the second locking piece is used to combine with the second locking hole to limit the freedom of the quick-change piece, and the second direction is perpendicular to the first direction and the third direction.

8. The piezoelectric injection valve according to claim 5, characterized in that A first limiting member is provided on the side plate body, and a first limiting groove is provided at the bottom of the valve body for cooperating with the first limiting member when the quick-change member is locked with the matching component.

9. The piezoelectric injection valve according to claim 5, characterized in that The flow channel assembly includes vertically arranged vertical strikers and flow channel functional components, and some of the vertical strikers are used to plug and cooperate with the flow channel holes; the positioning plate is provided with an avoidance opening for the part of the vertical striker located outside the flow channel hole to pass through.

10. The piezoelectric injection valve according to claim 5, characterized in that Also includes at least one of the following: The locking member and the first matching member include elastic beads; The side plate body is provided with a mounting block.

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