A piezoelectric injection valve

Abstract

This invention discloses a piezoelectric injection valve, comprising a valve body and a liquid tank assembly. A striker is installed within the valve body, and a hollow cylindrical seat is slidably disposed inside the valve body. The striker is located inside the hollow cylindrical seat, with an adjusting screw connected to one end. The other end of the hollow cylindrical seat protrudes from the valve body and is assembled and connected to the liquid tank assembly. A nozzle is disposed on the liquid tank assembly, and the nozzle corresponds to and cooperates with the striker. By controlling the adjusting screw, the hollow cylindrical seat is moved, which in turn moves the liquid tank assembly, thereby adjusting the distance between the striker and the nozzle. This invention, by independently setting the adjusting screw and the striker, prevents them from interfering with each other. This avoids collisions between the striker and the nozzle during dispensing, preventing the adjusting screw from loosening. This ensures assembly and operational stability, thereby guaranteeing consistent dispensing volume and effective dispensing.

Description

Technical Field

[0001] This invention relates to the field of piezoelectric injection valve technology, and more specifically to a piezoelectric injection valve. Background Technology

[0002] For example, a limit piezoelectric jet valve disclosed in Chinese patent document publication number CN112718303A has an adjusting screw connected to the top of the ejector pin. The ejector pin is moved up and down by adjusting the adjusting screw, thereby adjusting the tightness between the ejector pin and the nozzle. In the above technical solution, the ejector pin will collide with the nozzle when it moves during the dispensing process, which makes the adjusting screw easy to loosen. The assembly and operation stability are not good, which leads to changes in the amount of glue dispensed and affects the dispensing effect. Summary of the Invention

[0003] The present invention aims to provide a piezoelectric injection valve to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: a piezoelectric injection valve, comprising a valve body and a liquid box assembly, wherein a striking pin is installed in the valve body, and a hollow cylinder seat is slidably disposed inside the valve body, the striking pin being located inside the hollow cylinder seat, an adjusting screw being connected to one end of the hollow cylinder seat, and the other end of the hollow cylinder seat protruding out of the valve body and being assembled and connected to the liquid box assembly, and a nozzle being disposed on the liquid box assembly, the nozzle correspondingly cooperating with the striking pin, wherein the hollow cylinder seat is moved by controlling the adjusting screw, thereby moving the liquid box assembly, thereby adjusting the distance between the striking pin and the nozzle.

[0005] In one embodiment, the assembly further includes a striker mounting seat, through which the striker is mounted in the valve body. The liquid box assembly includes a liquid box body and a connector disposed on the liquid box body. One end of the connector is detachably mounted in the inner cavity of the hollow cylinder seat. The end of the striker mounting seat away from the adjusting screw cooperates with the inner cavity of the connector to form a storage chamber. The nozzle is disposed at the other end of the connector and communicates with the storage chamber.

[0006] In one embodiment, the inner wall of the hollow cylinder seat is provided with a plurality of first limiting protrusions along the circumferential direction, and the outer wall of the connector is provided with a plurality of second limiting protrusions along the circumferential direction, with the first limiting protrusions and the second limiting protrusions correspondingly limiting and engaging.

[0007] In one embodiment, the liquid cartridge assembly further includes a feed pipe and a heating mechanism mounted on one side of the liquid cartridge body, the feed pipe being used to supply adhesive and the heating mechanism being used to heat the adhesive.

[0008] In one embodiment, the liquid tank assembly further includes an insulating outer cover fitted over the outside of the liquid tank body.

[0009] In one embodiment, the hollow cylinder seat is L-shaped and includes a main cylinder seat and a limiting seat that are interconnected. A limiting mechanism is installed in the limiting seat, and one end of the connector is detachably installed in the main cylinder seat and engages with the limiting mechanism for limiting.

[0010] In one embodiment, the limiting mechanism includes a rotating cam, a limiting ball, and a handle. A receiving cavity is provided within the limiting seat. The rotating cam is disposed within the receiving cavity, and one end of the rotating cam forms a mounting shaft. The mounting shaft protrudes out of the receiving cavity and connects to the handle. A through hole connects the receiving cavity and the inner cavity of the main cylinder seat. The limiting ball is located within the through hole. A limiting groove is provided on the outer wall of the connecting member along the circumferential direction. A limiting slide groove and a release groove are provided on the outer wall of the rotating cam along the circumferential direction. The release groove is located at the end of the limiting slide groove, and the depth of the release groove is greater than the depth of the limiting slide groove. One end of the limiting ball corresponds to the limiting groove, and the other end corresponds to either the limiting slide groove or the release groove, thereby enabling the limiting mechanism and the connecting member to achieve limiting or releasing of the limiting position.

[0011] In one embodiment, a mounting groove is formed on the side of the valve body facing the nozzle, and a buffer block is installed at the end of the limiting seat away from the main cylinder seat. An elastic element is connected between the buffer block and the limiting seat, and the outer contour formed by the cooperation between the outer end of the main cylinder seat, the limiting seat, and the buffer block corresponds to the shape of the mounting groove.

[0012] In one embodiment, the valve body is provided with a first guide groove and a second guide groove at the corresponding mounting groove. The length direction of the first guide groove and the second guide groove is the same as the sliding direction of the hollow cylinder seat. One end of the buffer block is connected to a limiting member, which is located in the first guide groove. The end of the rotating cam away from the mounting shaft forms a limiting shaft, which is located in the second guide groove.

[0013] In one embodiment, a heat dissipation block is installed on the side wall of the valve body, and a heat dissipation channel is formed on the inner side of the heat dissipation block.

[0014] The present invention has the following beneficial effects:

[0015] (1) The present invention includes a valve body and a liquid box assembly. A striker is installed in the valve body. A hollow cylinder seat is slidably arranged inside the valve body. The striker is located inside the hollow cylinder seat. One end of the hollow cylinder seat is connected to an adjusting screw. The other end of the hollow cylinder seat protrudes out of the valve body and is assembled and connected to the liquid box assembly. A nozzle is provided on the liquid box assembly. The nozzle and the striker are correspondingly matched. By controlling the adjusting screw, the hollow cylinder seat is driven to move, which in turn drives the liquid box assembly to move, thereby adjusting the distance between the striker and the nozzle, and thus adjusting the tightness of the striker and the nozzle. By setting the adjusting screw and the striker independently and without interference, it is possible to avoid the striker from colliding with the nozzle during the dispensing process, which would cause the adjusting screw to loosen. This ensures the stability of the assembly and operation, thereby ensuring that the dispensing volume does not change and ensuring the dispensing effect.

[0016] (2) The hollow cylinder seat includes a main cylinder seat and a limiting seat that are interconnected. A limiting mechanism is installed in the limiting seat. The limiting mechanism cooperates with the connecting parts to limit the liquid box assembly, thereby enabling the liquid box assembly to be detachably installed in the main cylinder seat. This allows for quick installation and disassembly of the liquid box assembly. The installation and disassembly process is simpler and more convenient. It does not require installation with screws, which improves the efficiency of assembly, processing, and subsequent replacement and maintenance.

[0017] (3) A heat dissipation block is installed on the side wall of the valve body. A heat dissipation channel is formed on the inner side of the heat dissipation block to increase the heat dissipation surface area of ​​the heat dissipation block and improve the heat dissipation efficiency. Attached Figure Description

[0018] Figure 1 This is a front view of an embodiment of the present invention;

[0019] Figure 2 This is a perspective view of an embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional view and a partially enlarged view of an embodiment of the present invention;

[0021] Figure 4 This is an exploded view of an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the hollow cylindrical base according to an embodiment of the present invention (I);

[0023] Figure 6 This is a schematic diagram (II) of the hollow cylindrical seat according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of a connector according to an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of a rotating cam according to an embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the valve body according to an embodiment of the present invention;

[0027] Figure 10 This is a schematic diagram of the structure of a heat sink according to an embodiment of the present invention.

[0028] Attached diagram labels: 1 Valve body, 2 Liquid box body, 3 Connector, 4 Impact pin, 5 Hollow cylinder seat, 51 Main cylinder seat, 52 Limiting seat, 53 Relief port, 54 Receiving cavity, 55 Through hole, 6 Adjusting screw, 7 Nozzle, 8 Impact pin mounting seat, 9 Storage chamber, 10 First limiting protrusion, 11 Second limiting protrusion, 12 Material pipe, 13 Material pipe fixing bracket, 14 Heating mechanism, 15 Insulation cover, 16 Limiting mechanism, 161 Rotating cam, 1611 Limiting slide groove, 1612 Release groove, 1 613 Mounting shaft, 1614 Limiting shaft, 162 Limiting ball, 163 Handle, 17 Limiting groove, 18 Assembly groove, 19 Buffer block, 20 Elastic element, 21 Limiting element, 22 First guide groove, 23 Second guide groove, 24 Heat sink, 25 Heat dissipation channel, 26 Air inlet, 27 Air outlet, 28 Luer connector, 29 Control circuit board, 30 Piezoelectric drive mechanism, 301 Piezoelectric block, 302 Lever, 303 Return spring, 31 Electrical connector, 32 Aviation connector. Detailed Implementation

[0029] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0030] See Figure 1-10 As shown in the figure, as an embodiment of the present invention, a piezoelectric jet valve is provided, including a valve body 1 and a liquid box assembly. A striker 4 is installed inside the valve body 1, and a hollow cylinder seat 5 is slidably disposed inside the valve body 1. The striker 4 is located inside the hollow cylinder seat 5. One end of the hollow cylinder seat 5 is connected to an adjusting screw 6, and the other end of the hollow cylinder seat 5 protrudes out of the valve body 1 and is assembled and connected to the liquid box assembly. A nozzle 7 is disposed on the liquid box assembly, and the nozzle 7 corresponds to and cooperates with the striker 4. By controlling the adjusting screw 6 to drive the hollow cylinder seat 5 to move, and then drive the liquid box assembly to move, the distance between the striker 4 and the nozzle 7 is adjusted, thereby adjusting the tightness of the striker 4 and the nozzle 7, and adjusting and controlling the dispensing volume. The above technical solution, by setting the adjusting screw 6 and the striker 4 independently and without interference, avoids the striker 4 from colliding with the nozzle 7 during the dispensing process, which would cause the adjusting screw 6 to loosen, thereby ensuring the stability of assembly and operation, and thus ensuring that the dispensing volume does not change and ensuring the dispensing effect.

[0031] In this embodiment, a striker mounting seat 8 is also included. The striker 4 is mounted inside the valve body 1 through the striker mounting seat 8. The liquid box assembly includes a liquid box body 2 and a connector 3 disposed on the liquid box body 2. One end of the connector 3 is detachably installed in the inner cavity of the hollow cylinder seat 5. The end of the striker mounting seat 8 away from the adjusting screw 6 cooperates with the inner cavity of the connector 3 to form a storage chamber 9. The nozzle 7 is disposed at the other end of the connector 3 and communicates with the storage chamber 9. The liquid box assembly also includes a material pipe 12 and a heating mechanism 14 installed on one side of the liquid box body 2. Specifically, the material pipe 12 is installed at the inlet of the liquid box body 2 through a Luer connector 28. A material pipe fixing bracket 13 is provided on the valve body 1 to fix the material pipe 12. The inlet of the liquid box body 2 communicates with the storage chamber 9. The material pipe 12 is used to transport the glue into the storage chamber 9 through the inlet. The heating mechanism 14 is used to heat the glue. One end of the heating mechanism 14 is connected to an aviation connector 32 for connecting to an external heating device to ensure connection stability.

[0032] Of course, in other cases, the feed tube 12 can also be installed at the feed inlet of the liquid box body 2 via an integrated guide block.

[0033] In this embodiment, a heat sink 24 is installed on the side wall of the valve body 1. The heat sink 24 is an A6061 type aluminum alloy heat sink 24. Multiple heat dissipation channels 25 are formed on the inner side of the heat sink 24, and multiple screw holes are provided on the heat sink 24. The heat sink 24 is installed on the side wall of the valve body 1 through the screw holes and screws. One end of the heat dissipation channel 25 is connected to the screw hole, and the other end is connected to the outside. There are two heat dissipation channels 25. One end of the heat dissipation channel 25 connected to the outside is an air inlet 26, and the other end of the heat dissipation channel 25 connected to the outside is an air outlet 27, facilitating air flow in and out to remove heat from the valve body 1 and achieve rapid heat dissipation. The heat dissipation channels 25 are arranged in a curved and closely spaced manner on the inner side of the heat sink 24, thereby increasing the heat dissipation surface area of ​​the heat sink 24 and improving heat dissipation efficiency. This invention replaces the liquid box with an integrated heating liquid box, reducing external heating components and adding an independent heat sink 24, thus enhancing the heat dissipation effect.

[0034] In this embodiment, the liquid box assembly also includes an insulation cover 15, which is fitted over the outside of the liquid box body 2 to prevent heat loss from the liquid box body 2 and ensure the heating effect of the adhesive.

[0035] In this embodiment, a piezoelectric drive mechanism 30 and a control circuit board 29 are also installed inside the valve body 1. The control circuit board 29 is used to control the operation of the piezoelectric drive mechanism 30 and is electrically connected to the electrical connector 31 provided on the valve body 1. The end of the striker 4 away from the nozzle 7 is driven and connected to the piezoelectric drive mechanism 30. Specifically, the piezoelectric drive mechanism 30 may include a piezoelectric block 301, a lever 302 and a return spring 303. The return spring 303 is sleeved on the outside of the striker 4. The upper end of the return spring 303 abuts against the top of the striker 4, and the lower end abuts against the striker mounting seat 8. The short arm end of the lever 302 corresponds to the piezoelectric block 301, and the long arm end of the lever 302 corresponds to the striker 4, so as to amplify the stroke of the piezoelectric block 301 and transmit it to the striker 4. The hollow cylinder seat 5 has a clearance opening 53 for the long arm end of the lever 302 to pass through, and one end of the striker mounting seat 8 protrudes out of the clearance opening 53 and abuts against the valve body 1.

[0036] The inner wall of the hollow cylindrical base 5 is provided with a plurality of first limiting protrusions 10 along the circumferential direction, and the outer wall of the connector 3 is provided with a plurality of second limiting protrusions 11 along the circumferential direction. The first limiting protrusions 10 and the second limiting protrusions 11 are correspondingly limited and engaged. During assembly, the connector 3 is inserted into the inner wall of the hollow cylindrical base 5, and the connector 3 is rotated so that the first limiting protrusions 10 and the second limiting protrusions 11 are aligned and abutted, thereby achieving the limiting engagement. When it is necessary to release the limiting engagement, the connector 3 is rotated so that the first limiting protrusions 10 and the second limiting protrusions 11 are misaligned, and the connector 3 can be removed.

[0037] In this embodiment, the hollow cylinder seat 5 is L-shaped and includes a main cylinder seat 51 and a limiting seat 52 that are interconnected. A limiting mechanism 16 is installed in the limiting seat 52. One end of the connector 3 is detachably installed in the main cylinder seat 51 and is limited and cooperated with the limiting mechanism 16.

[0038] Furthermore, the limiting mechanism 16 includes a rotating cam 161, a limiting ball 162, and a handle 163. A receiving cavity 54 is provided within the limiting seat 52. The rotating cam 161 is disposed within the receiving cavity 54, and one end of the rotating cam 161 forms a mounting shaft 1613. The mounting shaft 1613 protrudes out of the receiving cavity 54 and connects to the handle 163. A through hole 55 connects the receiving cavity 54 and the inner cavity of the main cylinder seat 51. The limiting ball 162 is located within the through hole 55. A limiting mechanism is provided on the outer wall of the connecting member 3 along the circumferential direction. The outer wall of the rotating cam 161 is provided with a limiting groove 1611 and a release groove 1612 along the circumferential direction. The release groove 1612 is located at the end of the limiting groove 1611, and the depth of the release groove 1612 is greater than the depth of the limiting groove 1611. One end of the limiting ball 162 is correspondingly engaged with the limiting groove 17, and the other end is correspondingly engaged with the limiting groove 1611 or the release groove 1612, thereby enabling the limiting mechanism 16 and the connecting member 3 to achieve limiting or releasing the limiting; when needed To install the liquid box assembly into the hollow cylinder base 5, first insert the connector 3 into the corresponding installation position within the inner cavity of the hollow cylinder base 5. Then, by rotating the handle 163 in the forward direction, the rotating cam 161 is driven to rotate in the forward direction, causing the limiting ball 162 to abut against the limiting slide groove 1611 and the limiting groove 17. This allows the limiting mechanism 16 to limit and fix the connector 3 of the liquid box assembly in both the circumferential and axial directions, thereby achieving the detachable and fixed installation of the liquid box assembly into the hollow cylinder base 5. When it is necessary to disassemble the liquid box assembly... When the liquid box assembly is removed from the hollow cylinder seat 5, the handle 163 is rotated in the reverse direction, which in turn drives the rotating cam 161 to rotate in the reverse direction. This causes the limiting slide 1611 to disengage from the limiting ball 162, and the limiting ball 162 to be positioned between the release groove 1612 and the limiting groove 17. This releases the limiting mechanism 16 from limiting and fixing the connecting piece 3 of the liquid box assembly in the circumferential and axial directions. Then, the connecting piece 3 is rotated, causing the first limiting protrusion 10 and the second limiting protrusion 11 to be misaligned, allowing the entire liquid box assembly to be removed. This technical solution enables rapid installation and disassembly of the liquid box assembly, and the installation and disassembly process is simpler and more convenient. It does not require screw installation, improving the efficiency of assembly, processing, and subsequent replacement and maintenance.

[0039] In this embodiment, the valve body 1 has an assembly groove 18 on the side facing the nozzle 7. A buffer block 19 is installed at the end of the limiting seat 52 away from the main cylinder seat 51. An elastic element 20 connects the buffer block 19 and the limiting seat 52. The outer contour formed by the cooperation between the outer end of the main cylinder seat 51, the limiting seat 52, and the buffer block 19 corresponds to the shape of the assembly groove 18, so that during assembly, the outer end of the main cylinder seat 51, the limiting seat 52, and the buffer block 19 are clamped and limited at the assembly groove 18, improving the assembly accuracy. The valve body 1 is provided with a first guide groove 22 and a second guide groove 23 corresponding to the assembly groove 18. The length direction of the groove 22 and the second guide groove 23 is the same as the sliding direction of the hollow cylinder seat 5. One end of the buffer block 19 is connected to the limiting member 21, which is located in the first guide groove 22. The end of the rotating cam 161 away from the mounting shaft 1613 forms a limiting shaft 1614, which is located in the second guide groove 23. This setting ensures that the assembly of the liquid box assembly is more accurate and stable. At the same time, when the adjusting screw 6 is operated to adjust the tightness of the impact pin 4 and the nozzle 7, the movement direction of each component of the liquid box assembly can be accurately guided to avoid tilting and deviation, and ensure stable dispensing.

[0040] Both the elastic element 20 and the limiting element 21 are springs, and their length directions are perpendicular to each other, which can simultaneously serve as a buffer and a guide.

[0041] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail made to the invention without departing from the spirit and scope of the invention as defined in the appended claims fall within the protection scope of the invention.

Claims

1. A piezoelectric injection valve, characterized in that: The device includes a valve body and a liquid box assembly. A striker is installed inside the valve body, and a hollow cylinder seat is slidably arranged inside the valve body. The striker is located inside the hollow cylinder seat. One end of the hollow cylinder seat is connected to an adjusting screw, and the other end of the hollow cylinder seat protrudes out of the valve body and is assembled and connected to the liquid box assembly. A nozzle is provided on the liquid box assembly, and the nozzle corresponds to and cooperates with the striker. By controlling the adjusting screw, the hollow cylinder seat is driven to move, which in turn drives the liquid box assembly to move, thereby adjusting the distance between the striker and the nozzle. A heat sink is installed on the side wall of the valve body, and two heat dissipation channels are formed on the inner side of the heat sink. The heat sink is provided with multiple screw holes corresponding to the heat dissipation channels. The heat sink is installed on the side wall of the valve body by means of screw holes and screws. One end of each of the two heat dissipation channels is connected to different screw holes on the heat sink, and the other end is connected to the outside. One end of one heat dissipation channel connected to the outside is the air inlet, and the other end of the heat dissipation channel connected to the outside is the air outlet, so as to ensure that air flows in and out, carrying away the heat of the valve body and achieving rapid heat dissipation.

2. The piezoelectric injection valve according to claim 1, characterized in that: It also includes a striker mounting seat, through which the striker is mounted in the valve body. The liquid box assembly includes a liquid box body and a connector disposed on the liquid box body. One end of the connector is detachably mounted in the inner cavity of the hollow cylinder seat. The end of the striker mounting seat away from the adjusting screw cooperates with the inner cavity of the connector to form a storage chamber. The nozzle is disposed at the other end of the connector and communicates with the storage chamber.

3. The piezoelectric injection valve according to claim 2, characterized in that: The inner wall of the hollow cylinder seat is provided with multiple first limiting protrusions along the circumferential direction, and the outer wall of the connector is provided with multiple second limiting protrusions along the circumferential direction. The first limiting protrusions and the second limiting protrusions are correspondingly limited and engaged.

4. The piezoelectric injection valve according to claim 2, characterized in that: The liquid cartridge assembly also includes a feed pipe and a heating mechanism installed on one side of the liquid cartridge body. The feed pipe is used to supply adhesive, and the heating mechanism is used to heat the adhesive.

5. The piezoelectric injection valve according to claim 2, characterized in that: The liquid tank assembly also includes an insulating cover, which is fitted over the outside of the liquid tank body.

6. The piezoelectric injection valve according to claim 2, characterized in that: The hollow cylinder seat is L-shaped and includes a main cylinder seat and a limiting seat that are interconnected. A limiting mechanism is installed inside the limiting seat. One end of the connecting piece is detachably installed inside the main cylinder seat and is limited and matched with the limiting mechanism.

7. The piezoelectric injection valve according to claim 6, characterized in that: The limiting mechanism includes a rotating cam, a limiting ball, and a handle. A receiving cavity is provided within the limiting seat. The rotating cam is located within the receiving cavity, and one end of the rotating cam forms a mounting shaft. The mounting shaft protrudes out of the receiving cavity and connects to the handle. A through hole connects the receiving cavity and the inner cavity of the main cylinder seat. The limiting ball is located within the through hole. A limiting groove is provided on the outer wall of the connecting member along the circumferential direction. A limiting slide groove and a release groove are provided on the outer wall of the rotating cam along the circumferential direction. The release groove is located at the end of the limiting slide groove, and the depth of the release groove is greater than the depth of the limiting slide groove. One end of the limiting ball corresponds to the limiting groove, and the other end corresponds to the limiting slide groove or the release groove, thereby enabling the limiting mechanism and the connecting member to achieve limiting or releasing of the limiting position.

8. The piezoelectric injection valve according to claim 7, characterized in that: The valve body has an assembly groove on the side facing the nozzle. A buffer block is installed at the end of the limit seat away from the main cylinder seat. An elastic element connects the buffer block and the limit seat. The outer contour formed by the cooperation between the outer end of the main cylinder seat, the limit seat, and the buffer block corresponds to the shape of the assembly groove.

9. The piezoelectric injection valve according to claim 8, characterized in that: The valve body is provided with a first guide groove and a second guide groove at the corresponding mounting groove. The length direction of the first guide groove and the second guide groove is the same as the sliding direction of the hollow cylinder seat. One end of the buffer block is connected to a limit member, which is located in the first guide groove. The end of the rotating cam away from the mounting shaft forms a limit shaft, which is located in the second guide groove.

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