Piezoelectric injection valve and quick assembly method thereof

Abstract

The invention provides a piezoelectric injection valve and a quick assembly method thereof. The piezoelectric injection valve comprises a valve body, a flow channel assembly, a self-locking block, a quick-change piece and a locking assembly. The self-locking block is arranged on the side face of the bottom of the valve body, and the top face of the self-locking block comprises a first self-locking inclined face. The quick-change part comprises a bottom plate and a side plate; a self-locking groove is formed in the side plate, the top face of one end, in the first direction, of the self-locking groove comprises a third self-locking inclined face, and the third self-locking inclined face abuts against the first self-locking inclined face in a matched mode, so that the quick-changing piece and the self-locking block form a first inclined face self-locking structure. The first direction is parallel to the bottom plate; the locking assembly is arranged on the valve body and comprises a locking piece with a second self-locking inclined face formed on one side, the side face, in the second direction, of the side plate comprises a fourth self-locking inclined face used for abutting against the second self-locking inclined face in a matched mode, and the locking piece and the quick-changing piece are locked to be of a second inclined face self-locking structure capable of limiting horizontal displacement of the quick-changing piece. The second direction is perpendicular to the first direction. The runner assembly can be quickly disassembled and assembled.

Description

Technical Field

[0001] The present application relates to the technical field of injection valves, and in particular to a piezoelectric injection valve and a quick assembly method thereof. Background Art

[0002] Currently, piezoelectric jet valves are widely used in the high-precision, high-quality dispensing of micro-viscous fluids. However, disassembly of the flow channel in a piezoelectric jet valve requires the removal of the screws securing the flow channel assembly to the valve body. This significantly increases the time and cost required to remove these screws. Consequently, disassembly of existing flow channel assemblies is difficult and inefficient, increasing equipment repair and maintenance time. Summary of the Invention

[0003] In response to the shortcomings of existing methods, this application proposes a piezoelectric injection valve and a quick assembly method thereof to solve the technical problems existing in related technologies such as difficulty in disassembly and assembly of flow channel components, low efficiency, and increased repair and maintenance time of equipment.

[0004] In a first aspect, an embodiment of the present application provides a piezoelectric injection valve, comprising: Valve body; A flow channel assembly is detachably arranged at the bottom of the valve body; A self-locking block is provided on a side surface of the bottom of the valve body and extends in a direction perpendicular to the side surface of the valve body, wherein the top surface of the self-locking block includes a first self-locking inclined surface; The quick-change member includes a bottom plate and at least one side plate, and is configured to carry the flow channel assembly; the side plate is provided with at least one self-locking groove, and the top surface of one end of the self-locking groove along the first direction includes a third self-locking inclined surface, and the third self-locking inclined surface cooperates and abuts against the first self-locking inclined surface, so that the quick-change member and the self-locking block form a first inclined surface self-locking structure; the first direction is parallel to the bottom plate; A locking assembly is provided on the valve body and includes a locking member with a second self-locking inclined surface formed on one side. The side surface of the side plate along the second direction includes a fourth self-locking inclined surface for cooperating and abutting with the second self-locking inclined surface. After the first inclined surface self-locking structure is formed, the locking member and the quick-change member are locked into a second inclined surface self-locking structure that can limit the horizontal displacement of the quick-change member. The second direction is perpendicular to the first direction.

[0005] Optionally, the self-locking groove includes a straight groove with a connected top opening and an oblique groove located on one side of the straight groove, the width of the straight groove is not less than the width of the self-locking block, the side wall of the oblique groove is the third self-locking oblique surface for cooperating with the first self-locking oblique surface, and the locking piece is located on the side close to the oblique groove.

[0006] Optionally, the bevel groove is consistent with the shape of the self-locking block, and the self-locking block is embedded in the bevel groove.

[0007] Optionally, the quick-change part includes a base plate and two opposite side plates, the end face of the quick-change part is U-shaped, a long hole is provided on the base plate for the bottom of the flow channel assembly to pass through, the self-locking blocks are arranged on both sides of the valve body, and each of the side plates is provided with at least one self-locking groove.

[0008] Optionally, the locking assembly is arranged on one side of the valve body, and the locking piece is constructed to be retractable along the height direction of the valve body, and is limited to a self-locking position to form the second inclined self-locking structure with the side plate; or is limited to an unlocking position to release the self-locking with the quick-change piece, and the height of the unlocking position is higher than the height of the self-locking position.

[0009] Optionally, any one of the side plates is provided with an L-shaped notch on a side close to the inclined groove, and the fourth self-locking inclined surface extending along the second direction is formed on the end surface of the side plate at one end where the L-shaped notch is provided.

[0010] Optionally, the locking assembly further includes: The first limit block and the second limit block are sequentially spaced apart from the bottom of the valve body, the first limit block and the second limit block are each provided with a limit hole for the locking member to pass through, and the top of the first limit block is provided with a limit groove; an elastic member, one end of which abuts against the first limiting block, and the other end of which is fixedly connected to an end of the locking member away from the first limiting block; A shift rod is located at one end of the locking member away from the second self-locking inclined surface, and the shift rod is used to abut against the limiting groove or the top surface of the first limiting block.

[0011] Optionally, the piezoelectric injection valve also includes an elastic ball, which is arranged on the side of the bottom of the valve body and extends in a direction perpendicular to the side of the valve body. A positioning hole that cooperates with the elastic ball is opened on the inner wall of the side plate away from the locking assembly.

[0012] Optionally, a mounting block is provided on the side plate on at least one side of the quick-change component.

[0013] In a second aspect, an embodiment of the present application provides a quick assembly method for a piezoelectric injection valve, comprising: Install the quick-change component from bottom to top so that the bottom plate of the quick-change component abuts against the bottom of the flow channel assembly to form a combined body; Install the assembly from bottom to top, mate the self-locking groove with the self-locking block, so that the third self-locking inclined surface of the self-locking groove abuts against the first self-locking inclined surface of the self-locking block, so that the quick-change member and the self-locking block form a first inclined surface self-locking structure; Adjust the locking assembly to make the second self-locking inclined surface of the locking member abut against the fourth self-locking inclined surface on one side of the side plate, so that the locking member and the quick-change member form a second inclined surface self-locking structure to limit the horizontal displacement of the quick-change member.

[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, the quick-change part, the valve body, and the flow channel assembly are arranged separately. The quick-change part can be installed from bottom to top on the side of the flow channel assembly away from the valve body to carry the flow channel assembly. The flow channel assembly can be locked by cooperating and locking the self-locking groove of the quick-change part with the self-locking block on the valve body, which is convenient for quick disassembly and quick assembly of the flow channel assembly. In the present application, the first self-locking inclined surface of the self-locking block is engaged with the third self-locking inclined surface in the self-locking groove. On the basis of reasonably designed friction angles of the inclined surfaces and dynamic friction coefficients of the contact surfaces, the quick-change part and the self-locking block can be relatively stationary, achieving a balance condition (i.e., a self-locking condition) between the quick-change part and the self-locking block, that is, a first inclined surface self-locking structure can be formed to achieve single locking of the quick-change part and the flow channel assembly. Moreover, the present application also provides a locking component, and the locking component is arranged on a side close to the first self-locking inclined surface, so that after the quick-change part and the self-locking block form a first inclined self-locking structure, the second self-locking inclined surface of the locking part can abut against the fourth self-locking inclined surface of the side plate, so as to apply a force directed to the first inclined self-locking structure to the quick-change part, and limit the quick-change part from moving in a direction away from the self-locking block (in the opposite direction of the force directed to the first inclined self-locking structure), thereby preventing the quick-change part from sliding along the slope of the first self-locking inclined surface under its own gravity or external force, thereby realizing double locking of the quick-change part and the flow channel assembly, and ensuring the assembly stability of the flow channel assembly.

[0015] The quick-change parts of the present application do not require the aid of other tools during installation and disassembly, which can effectively improve the disassembly and assembly efficiency of the runner assembly and reduce the repair and maintenance costs of the runner assembly.

[0016] 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

[0017] 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 piezoelectric injection valve provided in an embodiment of the present application from a front view perspective; Figure 2 for Figure 1 A partial enlarged schematic diagram of the structure at point A in the middle; Figure 3A schematic diagram of an explosion of a piezoelectric injection valve provided in an embodiment of the present application from a rear-view perspective; Figure 4 A schematic diagram of the structure of the quick-change component provided in an embodiment of the present application; Figure 5 A schematic diagram of a state where the locking member is limited to the unlocked position before the flow channel assembly provided by an embodiment of the present application is installed; Figure 6 A schematic diagram of the state after the quick-change component and the flow channel assembly provided in an embodiment of the present application form an assembly; Figure 7 A schematic diagram of the state when the self-locking block provided in an embodiment of the present application abuts against the bottom of the straight groove; Figure 8 A schematic diagram of a state in which the self-locking block and the quick-change member form a first inclined self-locking structure when the horizontally sliding quick-change member provided in an embodiment of the present application is used; Figure 9 A schematic diagram of a state in which the locking member provided in an embodiment of the present application is limited in the self-locking position so that the locking member and the quick-change member form a second inclined self-locking structure; Figure 10 A schematic flow chart of a quick assembly method for a piezoelectric injection valve provided in an embodiment of the present application. Description of reference numerals: 01- first inclined plane self-locking structure; 02- second inclined plane self-locking structure; 10-valve body; 11-flow channel hole; 20-flow channel assembly; 21-vertical striker; 22-flow channel functional component; 30-self-locking block; 31-first self-locking inclined plane; 40 - quick-change part; 41 - bottom plate; 42 - side plate; 421 - long hole; 422 - positioning hole; 423 - fourth self-locking inclined surface; 43 - self-locking groove; 431 - straight groove; 432 - inclined groove; 433 - third self-locking inclined surface; 44 - L-shaped notch; 50-locking assembly; 51-locking member; 511-second self-locking inclined surface; 52-first limiting block; 521-limiting groove; 53-second limiting block; 54-elastic member; 55-shift lever; 60-elastic bead; 70-Mounting block. DETAILED DESCRIPTION

[0018] 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.

[0019] 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".

[0020] 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.

[0021] In the related art, the flow channel assembly of the piezoelectric injection valve is fixed to the valve body by screws. When the flow channel assembly needs to be cleaned, repaired or maintained, the screws fixing the flow channel assembly to the valve body need to be removed first, which is inconvenient to disassemble and assemble. The time and cost required for screw removal are significantly increased.

[0022] In order to solve the technical problems in related technologies such as difficulty in disassembling and assembling flow channel components, low efficiency, and increased repair and maintenance time of equipment, the embodiment of the present application proposes a new form of piezoelectric injection valve.

[0023] Reference Figures 1-9 The piezoelectric injection valve of the present application includes a valve body 10, a flow channel assembly 20, a self-locking block 30, a quick-change component 40, and a locking assembly 50. The flow channel assembly 20 is detachably arranged at the bottom of the valve body 10.

[0024] Reference Figure 1-Figure 3 The self-locking block 30 is arranged on the side of the bottom of the valve body 10 and extends in a direction perpendicular to the side of the valve body 10 . The top surface of the self-locking block 30 includes a first self-locking inclined surface 31 .

[0025] Reference Figure 1-Figure 3 The quick-change part 40 includes a bottom plate 41 and at least one side plate 42, and is constructed to carry the flow channel assembly 20; at least one self-locking groove 43 is provided on the side plate 42, and the top surface of one end of the self-locking groove 43 along the first direction includes a third self-locking inclined surface 433, and the third self-locking inclined surface 433 cooperates and abuts with the first self-locking inclined surface 31, so that the quick-change part 40 and the self-locking block 30 form a first inclined surface self-locking structure 01; the first direction is parallel to the bottom plate 41.

[0026] Reference Figure 1-Figure 3The locking assembly 50 is arranged on the valve body 10, and includes a locking member 51 with a second self-locking inclined surface 511 formed on one side. The side surface of the side plate 42 along the second direction includes a fourth self-locking inclined surface 423 for cooperating and abutting with the second self-locking inclined surface 511. After the first inclined surface self-locking structure 01 is formed, the locking member 51 and the quick-change member 40 are locked into a second inclined surface self-locking structure 02 that can limit the horizontal displacement of the quick-change member 40. The second direction is perpendicular to the first direction.

[0027] In the embodiment of the present application, the quick-change part 40 is arranged separately from the valve body 10 and the flow channel assembly 20. The quick-change part 40 can be installed from bottom to top on the side of the flow channel assembly 20 away from the valve body 10 to carry the flow channel assembly 20. The flow channel assembly 20 can be locked by cooperating and locking the self-locking groove 43 of the quick-change part 40 with the self-locking block 30 on the valve body 10, which facilitates the quick disassembly and quick installation of the flow channel assembly 20; in the present application, with the help of the first self-locking inclined surface 31 of the self-locking block 30 and the third self-locking inclined surface 433 in the self-locking groove 43, the quick-change part 40 and the self-locking block 30 can remain relatively stationary on the basis of reasonably designed friction angle of the inclined surface and dynamic friction coefficient of the contact surface, so as to achieve the equilibrium condition (i.e. self-locking condition) of the quick-change part 40 and the self-locking block 30, i.e., the first inclined surface self-locking structure 01 can be formed to achieve single locking of the quick-change part 40 and the flow channel assembly 20.

[0028] Moreover, the present application also provides a locking assembly 50, and the locking assembly 50 is arranged on a side close to the first self-locking inclined surface 31. After the quick-change part 40 and the self-locking block 30 form the first inclined surface self-locking structure 01, the second self-locking inclined surface 511 of the locking part 51 can abut against the fourth self-locking inclined surface 423 of the side plate 42, so as to apply a force directed to the first inclined surface self-locking structure 01 to the quick-change part 40, restricting the quick-change part 40 from moving in a direction away from the self-locking block 30 (in the opposite direction to the above-mentioned force directed to the first inclined surface self-locking structure 01), thereby preventing the quick-change part 40 from sliding along the slope of the first self-locking inclined surface 31 under its own gravity or external force, thereby realizing double locking of the quick-change part 40 and the flow channel assembly 20, and ensuring the assembly stability of the flow channel assembly 20.

[0029] The quick-change component 40 of the present application does not require any other tools during installation and removal, which can effectively improve the efficiency of assembly and removal of the flow channel assembly 20 and reduce the repair and maintenance costs of the flow channel assembly 20.

[0030] Optionally, a flow channel hole 11 extending along the height of the valve body 10 is formed near the bottom of the valve body 10. The flow channel assembly 20 includes a vertical striker 21 and a flow channel functional component 22. The vertical striker 21 is arranged perpendicular to the flow channel functional component 22. A portion of the top of the vertical striker 21 is inserted into the flow channel hole 11, and the top surface of the flow channel functional component 22 abuts the bottom of the valve body 10 to achieve initial positioning of the flow channel assembly 20.

[0031] When installing the quick-change part 40, the quick-change part 40 requires at least one side plate 42 to abut the side wall of the flow channel functional component 22 and be used to cooperate with the self-locking block 30. The bottom plate 41 of the quick-change part 40 abuts the bottom surface of the flow channel functional component 22 to support the flow channel assembly 20.

[0032] Optionally, refer to Figure 3-Figure 4 The self-locking groove 43 includes a straight groove 431 with a top opening and a bevel groove 432 located on one side of the straight groove 431. The width of the straight groove 431 is not less than the width of the self-locking block 30. The side wall of the bevel groove 432 is a third self-locking bevel 433 for cooperating with the first self-locking bevel 31. The locking piece 51 is located on the side close to the bevel groove 432.

[0033] The self-locking groove 43 of the present application includes a straight groove 431 with an opening at the top and an inclined groove 432 located on one side of the straight groove 431. When installing the quick-change part 40 from bottom to top, the straight groove 431 can be aligned with the self-locking block 30 first. When the self-locking block 30 slides into the straight groove 431 and abuts the bottom of the straight groove 431, the quick-change part 40 is slid along the plane of the first direction so that the self-locking block 30 is stuck into the inclined groove 432. The first self-locking inclined surface 31 and the third self-locking inclined surface 433 are matched to form a first inclined surface self-locking structure 01, which limits the position of the flow channel assembly 20, thereby making the installation of the quick-change part 40 more convenient and quicker, and further improving work efficiency. The plane of the first direction is defined as a horizontal plane in the present application.

[0034] Optionally, refer to Figure 3-Figure 4 The quick-change part 40 includes a bottom plate 41 and two opposite side plates 42. The end face of the quick-change part 40 is U-shaped. A long hole 421 is provided on the bottom plate 41 for the bottom of the flow channel assembly 20 to pass through. The self-locking blocks 30 are arranged on both sides of the valve body 10, and each side plate 42 is provided with at least one self-locking groove 43.

[0035] In the embodiment of the present application, the bottom of the vertical striker 21 protrudes from the bottom of the flow channel functional component 22, so a long hole 421 is also provided on the bottom plate 41 for the bottom of the vertical striker 21 to pass through. The long hole 421 extends along the first direction, providing a certain amount of movement space for the vertical striker 21, so that the quick-change part 40 can slide relatively along the plane of the first direction, thereby gradually embedding the self-locking block 30 into the inclined groove 432.

[0036] In order to ensure the limiting effect of the quick-change part 40 on the flow channel assembly 20, the present application sets the quick-change part 40 to a U-shaped structure, that is, it includes two opposite side plates 42 and a bottom plate 41, and self-locking blocks 30 are set on both sides of the valve body 10, which can form a first inclined self-locking structure 01 on both sides of the quick-change part 40 to ensure the supporting stability of the flow channel assembly 20 and balance the force on both sides of the quick-change part 40 to ensure that the quick-change part 40 is evenly stressed and improve the locking and limiting effect of the flow channel assembly 20.

[0037] Optionally, at least two self-locking blocks 30 are provided at intervals along the width direction of the valve body 10. This embodiment of the present application only uses two self-locking blocks 30 as an example for illustration. In actual application, to ensure the installation stability of the quick-change member 40, more than three self-locking blocks 30 can also be designed.

[0038] Optionally, refer to Figure 2 The inclined groove 432 is consistent with the shape of the self-locking block 30, and the self-locking block 30 is embedded in the inclined groove 432.

[0039] In the embodiment of the present application, the cross-sectional shape of the self-locking block 30 is designed to be a right-angled trapezoid with the top surface processed into a first self-locking bevel 31. The first self-locking bevel 31 forms a first angle with the plane where the first direction is located. The bottom and side surfaces of the bevel groove 432 match the shape of the self-locking block 30, so that the self-locking block 30 is completely embedded in the bevel groove 432, thereby improving the assembly accuracy and achieving the first bevel self-locking structure 01, ensuring that the quick-change part 40 will not loosen after the external force is removed.

[0040] In order to achieve the bevel self-locking condition between the quick-change part 40 and the self-locking block 30, the angle design of the bevel is very important. The expression when the bevel self-locking condition is met is: (Expression 1) in, is the kinetic friction coefficient between the first self-locking inclined surface 31 and the third self-locking inclined surface 433, is the friction angle between the first self-locking inclined surface 31 and the third self-locking inclined surface 433 .

[0041] In this application, the self-locking block 30 and the quick-change member 40 are made of stainless steel, so the first self-locking inclined surface 31 and the third self-locking inclined surface 433 are The value is 0.3-0.4, Taking =0.3, we get: At 16.6°, the bevel can be self-locking.

[0042] Optionally, in the embodiment of the present application, the bevel angle of the first self-locking bevel 31 of the self-locking block 30 and the bevel angle of the second self-locking bevel 511 of the self-locking groove 43 are designed to be 12°, which can achieve the self-locking condition of the quick-change part 40 and the self-locking block 30.

[0043] Optionally, the locking assembly 50 is arranged on one side of the valve body 10, and the locking member 51 is constructed to be retractable along the height direction of the valve body 10, and is limited to a self-locking position to form a second inclined self-locking structure 02 with the side plate 42; or is limited to an unlocking position to release the self-locking with the quick-change member 40, and the height of the unlocking position is higher than the height of the self-locking position.

[0044] In the embodiment of the present application, by designing a locking member 51 that can be extended and retracted along the height direction of the valve body 10, the quick-change member 40 and the self-locking block 30 can form a first inclined locking structure, that is, after one-time locking, the locking member 51 slides downward or stretches and reaches the self-locking position, so that the locking member 51 and the quick-change member 40 form a second inclined locking structure, that is, double locking. When unlocking is required, the locking member 51 is slid upward or retracted so that the locking member 51 is limited to the unlocking position. The movement trajectory of the locking member 51 and the locking position in the two states have been determined in advance, which facilitates the rapid locking and unlocking between the locking member 51 and the quick-change member 40, simplifies the structure of the locking member 51, and reduces the volume and structure of the piezoelectric injection valve of the present application.

[0045] Of course, the locking member 51 can also be configured to be detachable from one side of the valve body 10. That is, after the quick-change member 40 and the self-locking block 30 have reached the first inclined self-locking structure 01, the locking member 51 can be slid into a predetermined position on the valve body 10, so that the second self-locking inclined surface 511 of the locking member 51 and the fourth self-locking inclined surface 423 on the quick-change member 40 cooperate and abut, forming a second inclined self-locking structure 02, thereby achieving a double fixation effect on the installation of the quick-change member 40. When disassembly is required, the locking member 51 can be simply pulled out.

[0046] Optionally, refer to Figure 4 Any one of the side plates 42 is provided with an L-shaped notch 44 on a side close to the inclined groove 432 , and a fourth self-locking inclined surface 423 extending along the second direction is formed on the end surface of the side plate 42 at one end where the L-shaped notch 44 is provided.

[0047] In the embodiment of the present application, only one locking assembly 50 is provided, and is arranged near one of the side panels 42. The present application designs an L-shaped notch 44 on the side panel 42 close to the side of the locking assembly 50, and processes a fourth self-locking inclined surface 423 on the end face of one end of the L-shaped notch 44. It is possible to artificially create a height difference in contact with the second self-locking inclined surface 511 of the locking member 51, so as to cooperate with the self-locking position and unlocking position of the locking member 51, thereby further simplifying the structure.

[0048] Optionally, the locking member 51 may be a rod or a column, a rectangular block, or a wedge block, as long as the second self-locking inclined surface 511 is processed on one side of the locking member 51 .

[0049] Optionally, refer to Figure 5-Figure 9 The locking assembly 50 further includes a first limiting block 52 , a second limiting block 53 , an elastic member 54 and a shifting rod 55 .

[0050] The first and second limit blocks 52, 53 are spaced apart from the bottom of the valve body 10. Each of the first and second limit blocks 52, 53 defines a limit hole for the locking member 51 to pass through. A limit groove 521 is defined at the top of the first limit block 52. An elastic member 54 abuts the first limit block 52 at one end and is fixedly connected to the end of the locking member 51 away from the first limit block 52 at the other end. A lever 55 is located at the end of the locking member 51 away from the second self-locking inclined surface 511. The lever 55 is configured to abut within the limit groove 521 or against the top surface of the first limit block 52.

[0051] In the embodiment of the present application, a limiting groove 521 is provided in the first limiting block 52, and a height difference exists between the bottom surface of the limiting groove 521 and the top surface of the first limiting block 52. That is, when the lever 55 is engaged with the limiting groove 521, the locking member 51 extends, thereby achieving a double locking between the locking member 51 and the quick-change member 40. When the lever 55 is pulled upward and abuts the top surface of the first limiting block 52, the locking member 51 is in the unlocked position, thereby enabling the quick-change member 40 to be quickly removed.

[0052] Optionally, refer to Figure 3-Figure 4 The piezoelectric injection valve also includes an elastic ball 60, which is arranged on the side of the bottom of the valve body 10 and extends in a direction perpendicular to the side of the valve body 10. A positioning hole 422 that cooperates with the elastic ball 60 is opened on the inner wall of the side plate 42 on the side away from the locking assembly 50.

[0053] The present application also designs an elastic ball 60 on the side of the bottom of the valve body 10. During the process of installing the quick-change part 40 from bottom to top until it is in place, the elastic ball 60 abuts against the inner wall of the quick-change part 40 and is compressed. When the quick-change part 40 is moved into place, the elastic ball 60 is aligned with the positioning hole 422 on the side plate 42. The elastic ball 60 can be stuck into the positioning hole 422 under the action of the restoring force, thereby achieving triple locking of the quick-change part 40 to ensure the supporting stability of the quick-change part 40 on the flow channel assembly 20.

[0054] Optionally, a ball limit pin (not shown in the figure) is also installed on the other side of the bottom of the valve body 10, and the elastic ball 60 and the ball limit pin are arranged vertically in different planes. Then, by rotating or pushing the ball limit pin, the elastic ball 60 can protrude from the surface of the valve body 10 or be hidden inside the valve body 10, thereby facilitating the locking and unlocking of the elastic ball 60 and the positioning hole 422.

[0055] Optionally, refer to Figure 1 A mounting block 70 is provided on at least one side of the side plate 42 of the quick-change member 40 .

[0056] In the present application, mounting blocks 70 are provided on both side panels 42 to facilitate the operator to hold the mounting blocks 70 for installation.

[0057] Refer to the figure - Figure 9 and Figure 10 Based on the same inventive concept, the present invention provides a quick assembly method for a piezoelectric injection valve, comprising the following steps: S101: Install the quick-change component 40 from bottom to top, so that the bottom plate 41 of the quick-change component 40 abuts against and supports the bottom of the flow channel assembly 20 to form an assembly.

[0058] When installing the quick-change part 40 from bottom to top, first install the quick-change part 40 from bottom to top, so that the bottom of the vertical striker 21 passes through the long hole 421 of the bottom plate 41 of the quick-change part 40, so that the bottom plate 41 abuts against the bottom of the flow channel functional component 22, thereby realizing the combination of the quick-change part 40 and the flow channel assembly 20.

[0059] In another optional method, the flow channel assembly 20 can be first plugged into the valve body 10 to achieve preliminary positioning, and then the long hole 421 of the bottom plate 41 of the quick-change part 40 is aligned with the bottom of the vertical striker 21, so that the quick-change part 40 avoids the bottom of the vertical striker 21 and abuts against the flow channel functional component 22, so that the quick-change part 40 can carry the flow channel assembly 20.

[0060] Before installing the quick-change component 40 from bottom to top, step S100 is also included: first, the lever 55 is lifted and abutted against the surface of the first limit block 52, so that the bottom of the locking component 51 is lifted above the bottom surface of the valve body 10, and the locking component 51 is limited to the unlocked position.

[0061] S102: Install the assembly from bottom to top, match the self-locking groove 43 with the self-locking block 30, so that the third self-locking inclined surface 433 of the self-locking groove 43 abuts against the first self-locking inclined surface 31 of the self-locking block 30, so that the quick-change part 40 and the self-locking block 30 form a first inclined surface self-locking structure 01.

[0062] During installation, align the vertical striker 21 of the flow channel assembly 20 with the flow channel hole 11 at the bottom of the valve body 10, and then install it from bottom to top so that the vertical striker 21 is inserted into the flow channel hole 11 to achieve preliminary positioning of the assembly and the valve body 10.

[0063] In the embodiment of the present application, the self-locking groove 43 includes a straight groove 431 and an oblique groove 432 that are connected. Step S102 includes: S1021 : Align the straight groove 431 with the self-locking block 30 , and push the quick-change member 40 upward so that the self-locking block 30 abuts against the bottom of the straight groove 431 .

[0064] S1022: Slide the quick-change part 40 horizontally to insert the self-locking block 30 into the inclined groove 432, so that the first self-locking inclined surface 31 of the self-locking block 30 cooperates and abuts with the third self-locking inclined surface 433 on the inner wall of the inclined groove 432, and the quick-change part 40 can be relatively statically hung on the self-locking block 30, forming a first inclined surface self-locking structure 01, thereby realizing single locking of the quick-change part 40 and the self-locking block 30.

[0065] S103: Adjust the locking assembly 50 and make the second self-locking inclined surface 511 of the locking member 51 abut against the fourth self-locking inclined surface 423 on one side of the side plate 42, so that the locking member 51 and the quick-change member 40 form a second inclined surface self-locking structure 02 to limit the horizontal displacement of the quick-change member 40.

[0066] In order to ensure that the quick-change part 40 and the self-locking block 30 maintain a stable self-locking state, after the quick-change part 40 and the self-locking block 30 form the first inclined self-locking structure 01, the quick-change part 40 and the locking part 51 form a second inclined self-locking structure 02 by cooperating and abutting the second self-locking inclined surface 511 on one side of the locking part 51 with the fourth self-locking inclined surface 423 on one side of the side plate 42. The locking part 51 applies a horizontal component of force directed to the first self-locking inclined surface 31 to the quick-change part 40 to prevent the quick-change part 40 from slipping, thereby ensuring the installation stability of the quick-change part 40. No other tools are required for disassembly and assembly, and the operation is simpler, which can improve work efficiency.

[0067] Optionally, after the quick-change member 40 and the self-locking block 30 form the first inclined self-locking structure 01, the lever 55 is lowered into the limiting groove 521, causing the locking member 51 to extend downward, thereby enabling the locking member 51 to engage with the quick-change member 40 to form the second inclined self-locking structure 02. During disassembly, the lever 55 and the locking member 51 are pulled upward, and then the lever 55 is rotated so that the lever 55 abuts the top surface of the first limiting block 52 to release the self-locking between the locking member 51 and the quick-change member 40. The quick-change member 40 is then disassembled in the opposite direction to release the self-locking between the quick-change member 40 and the self-locking block 30. The flow channel assembly 20 can then be quickly disassembled and assembled without the need for additional tools, effectively improving work efficiency.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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: Valve body; A flow channel assembly is detachably arranged at the bottom of the valve body; A self-locking block is provided on a side surface of the bottom of the valve body and extends in a direction perpendicular to the side surface of the valve body, wherein the top surface of the self-locking block includes a first self-locking inclined surface; The quick-change member includes a bottom plate and at least one side plate, and is configured to carry the flow channel assembly; the side plate is provided with at least one self-locking groove, and the top surface of one end of the self-locking groove along the first direction includes a third self-locking inclined surface, and the third self-locking inclined surface cooperates and abuts against the first self-locking inclined surface, so that the quick-change member and the self-locking block form a first inclined surface self-locking structure; the first direction is parallel to the bottom plate; A locking assembly is provided on the valve body and includes a locking member with a second self-locking inclined surface formed on one side. The side surface of the side plate along the second direction includes a fourth self-locking inclined surface for cooperating and abutting with the second self-locking inclined surface. After the first inclined surface self-locking structure is formed, the locking member and the quick-change member are locked into a second inclined surface self-locking structure that can limit the horizontal displacement of the quick-change member. The second direction is perpendicular to the first direction.

2. The piezoelectric injection valve according to claim 1, characterized in that The self-locking groove includes a straight groove with a top opening and a bevel groove located on one side of the straight groove. The width of the straight groove is not less than the width of the self-locking block. The side wall of the bevel groove is the third self-locking bevel used to cooperate with the first self-locking bevel. The locking piece is located on a side close to the bevel groove.

3. The piezoelectric injection valve according to claim 2, characterized in that The inclined groove is consistent with the shape of the self-locking block, and the self-locking block is embedded in the inclined groove.

4. The piezoelectric injection valve according to claim 1, characterized in that The quick-change part includes a base plate and two opposite side plates. The end face of the quick-change part is U-shaped. A long hole is provided on the base plate for the bottom of the flow channel assembly to pass through. The self-locking blocks are arranged on both sides of the valve body, and each of the side plates is provided with at least one self-locking groove.

5. The piezoelectric injection valve according to claim 1, characterized in that The locking assembly is arranged on one side of the valve body, and the locking piece is constructed to be retractable along the height direction of the valve body, and is limited to a self-locking position to form the second inclined self-locking structure with the side plate; or is limited to an unlocking position to release the self-locking with the quick-change piece, and the height of the unlocking position is higher than the height of the self-locking position.

6. The piezoelectric injection valve according to claim 5, characterized in that Any one of the side plates is provided with an L-shaped notch on a side close to the inclined groove, and the fourth self-locking inclined surface extending along the second direction is formed on the end surface of the side plate at one end where the L-shaped notch is provided.

7. The piezoelectric injection valve according to claim 5, characterized in that The locking assembly further comprises: The first limit block and the second limit block are sequentially spaced apart from the bottom of the valve body, the first limit block and the second limit block are each provided with a limit hole for the locking member to pass through, and the top of the first limit block is provided with a limit groove; an elastic member, one end of which abuts against the first limiting block, and the other end of which is fixedly connected to an end of the locking member away from the first limiting block; A shift rod is located at one end of the locking member away from the second self-locking inclined surface, and the shift rod is used to abut against the limiting groove or the top surface of the first limiting block.

8. The piezoelectric injection valve according to claim 1, characterized in that It also includes an elastic bead, which is arranged on the side of the bottom of the valve body and extends in a direction perpendicular to the side of the valve body. A positioning hole that cooperates with the elastic bead is opened on the inner wall of the side plate away from the locking assembly.

9. The piezoelectric injection valve according to claim 1, characterized in that A mounting block is provided on the side plate on at least one side of the quick-change member.

10. A quick assembly method for a piezoelectric injection valve according to any one of claims 1 to 9, characterized in that: include: Install the quick-change component from bottom to top so that the bottom plate of the quick-change component abuts against and supports the bottom of the flow channel assembly to form a combined body; Install the assembly from bottom to top, mate the self-locking groove with the self-locking block, so that the third self-locking inclined surface of the self-locking groove abuts against the first self-locking inclined surface of the self-locking block, so that the quick-change member and the self-locking block form a first inclined surface self-locking structure; Adjust the locking assembly to make the second self-locking inclined surface of the locking member abut against the fourth self-locking inclined surface on one side of the side plate, so that the locking member and the quick-change member form a second inclined surface self-locking structure to limit the horizontal displacement of the quick-change member.

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