Flow channel assembly of piezoelectric ceramic injection valve

Abstract

The utility model discloses a flow channel assembly of a piezoelectric ceramic injection valve, which is characterized in that a heat conduction sleeve is arranged on the outer side of a body and is positioned on the outer sides of a glue inlet flow channel and a glue outlet flow channel, at least one heating or refrigerating element is embedded in the heat conduction sleeve, and the body is connected with an injection valve body through a mounting block; a plurality of grooves are formed in the surface, facing the injection valve body, of a mounting block arranged on the outer side of the end, opposite to the heat conduction sleeve, of the body in a sleeving mode at intervals, a heat insulation block is embedded in each groove, and the upper end face of each heat insulation block is higher than the surface of the mounting block and used for making contact with the surface, facing the mounting block, of the injection valve body. According to the injection valve, the precision and the quality of glue can be guaranteed by heating or refrigerating the glue flow channel when the glue is ejected, and the situation that the performance of the injection valve is affected due to the fact that heat is conducted upwards when the injection valve is assembled to the injection valve body can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of dispensing technology, and in particular to a flow channel assembly for a piezoelectric ceramic jet valve. Background Technology

[0002] In the fields of packaging and electronic product assembly, non-contact spray valves are increasingly widely used due to their high efficiency and high precision. The main structure of a piezoelectric valve consists of a valve body, a piezoelectric actuator housed within the valve body, an amplifier, and a flow channel assembly. Its main principle is as follows: the amplifier amplifies the deformation of the piezoelectric ceramic in the piezoelectric actuator after energization, using a lever principle, and transmits this amplification to the spray push rod in the flow channel assembly. This push rod then sprays the adhesive from the flow channel assembly. Due to the inherent properties of adhesives (such as hot melt adhesives), some adhesives require heating or cooling before spraying. The piezoelectric actuator within the spray valve is temperature-sensitive, and the heating or cooling temperatures applied to the adhesive can negatively impact the spray valve. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a flow channel assembly for a piezoelectric ceramic jet valve. This flow channel assembly can ensure the accuracy and quality of the glue when it is sprayed out, and can also prevent heat conduction from affecting the performance of the jet valve when it is assembled onto the jet valve body.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a flow channel assembly for a piezoelectric ceramic injection valve, comprising: a body having an inlet flow channel and an outlet flow channel respectively opened inside, and a nozzle mounted on the body; the lower end of the outlet flow channel, which is connected to the inlet flow channel at its upper end, is connected to the nozzle; a heat-conducting sleeve is provided on the outside of the body and outside the inlet and outlet flow channels; at least one heating or cooling element is embedded in the heat-conducting sleeve; the body is connected to the injection valve body through a mounting block; a plurality of grooves are spaced apart on the surface of the mounting block facing the injection valve body, which is fitted onto the body at one end opposite to the heat-conducting sleeve; a heat-insulating block is embedded in each groove; the upper end surface of the heat-insulating block is higher than the surface of the mounting block and is used to contact the surface of the injection valve body facing the mounting block.

[0005] The following are further improvements to the above technical solution:

[0006] 1. In the above scheme, the heat insulation block is a ceramic heat insulation block.

[0007] 2. In the above scheme, the heat insulation block is a spherical heat insulation block, and the groove is a spherical groove.

[0008] 3. In the above scheme, there are four grooves and four heat insulation blocks, which are respectively located at the four corners of the mounting block.

[0009] 4. In the above scheme, the mounting block is a C-shaped mounting block, and one end of the body is embedded in the C-shaped groove formed by the C-shaped mounting block.

[0010] 5. In the above scheme, the heat-conducting sleeve is a metal heat-conducting sleeve.

[0011] 6. In the above solution, the lower surface of the body has a mounting protrusion, and the nozzle is mounted on the lower end face of the mounting protrusion via a mounting base.

[0012] 7. In the above scheme, the mounting base with internal threads and the mounting protrusion with external threads are connected by threads.

[0013] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0014] The flow channel assembly of this piezoelectric ceramic spray valve has a heat-conducting sleeve on its outer side, located outside the glue inlet and glue outlet flow channels. At least one heating or cooling element is embedded in the heat-conducting sleeve. The main body is connected to the spray valve body through a mounting block. The mounting block, which is fitted onto the main body at the end opposite to the heat-conducting sleeve, has several grooves spaced apart on its surface facing the spray valve body. Each groove contains a heat-insulating block, the upper end of which is higher than the surface of the mounting block and is used to contact the surface of the spray valve body facing the mounting block. This design ensures the accuracy and quality of the glue during spraying by heating or cooling the glue flow channels, and also prevents heat conduction from affecting the performance of the spray valve when it is assembled onto the spray valve body. Attached Figure Description

[0015] Appendix Figure 1 This is a schematic diagram of the flow channel assembly of the piezoelectric ceramic jet valve of this utility model;

[0016] Appendix Figure 2 This is a cross-sectional view of the flow channel assembly and the striking pin of the jet valve of this utility model in the engagement state.

[0017] Appendix Figure 3 This is a cross-sectional view of the flow channel assembly of the piezoelectric ceramic jet valve of this utility model;

[0018] Appendix Figure 4 This is a cross-sectional view of a portion of the flow channel assembly of the piezoelectric ceramic jet valve of this utility model.

[0019] In the above attached figures: 1. Body; 2. Nozzle; 41. Inlet channel; 42. Outlet channel; 51. Mounting protrusion; 52. Mounting base; 6. Heat-conducting sleeve; 61. Heating or cooling element; 7. Mounting block; 81. Groove; 82. Heat insulation block. Detailed Implementation

[0020] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0021] Example 1: A flow channel assembly for a piezoelectric ceramic injection valve, generally used in conjunction with a piezoelectric ceramic injection valve, includes: a body 1 with an inlet flow channel 41 and an outlet flow channel 42 respectively opened inside, and a nozzle 2 mounted on the body 1. The lower end of the outlet flow channel 42, which is connected to the inlet flow channel 41 at its upper end, is connected to the nozzle 2. A heat-conducting sleeve 6 is provided on the outside of the body 1 and outside the inlet flow channel 41 and the outlet flow channel 42. At least one heating or cooling element 61 is embedded in the heat-conducting sleeve 6. The body 1 is connected to the injection valve body through a mounting block 7. The mounting block 7, which is fitted on the body 1 at one end opposite to the heat-conducting sleeve 6, has a plurality of grooves 81 spaced apart on its surface facing the injection valve body. A heat-insulating block 82 is embedded in each groove 81. The upper end surface of the heat-insulating block 82 is higher than the surface of the mounting block 7 and is used to contact the surface of the injection valve body facing the mounting block 7.

[0022] The nozzle 2 is assembled onto the lower end face of the spray valve body by bolts and mounting block 7. The lower end of the impact pin 3, which cooperates with the nozzle 2, is inserted into the glue dispensing channel 42. Through repeated impacts between the impact pin 3 and the nozzle 2 driven by piezoelectric ceramic, the glue in the glue dispensing channel 42 is sprayed outward from the lower end of the nozzle 3.

[0023] The aforementioned heating or cooling element 61 is obtained through external purchase, such as a heating rod or a semiconductor cooling chip, which falls within the scope of existing technology and will not be elaborated here.

[0024] The aforementioned heat insulation block 82 is a ceramic heat insulation block; the aforementioned heat insulation block 82 is a spherical heat insulation block, and the aforementioned groove 81 is a spherical groove; the aforementioned groove 81 and heat insulation block 82 are each provided in 4 units, and are respectively provided at the 4 corners of the mounting block 7; the aforementioned heat-conducting sleeve 6 is a metal heat-conducting sleeve.

[0025] Example 2: A flow channel assembly for a piezoelectric ceramic injection valve, comprising: a body 1 having an inlet flow channel 41 and an outlet flow channel 42 respectively opened inside, and a nozzle 2 mounted on the body 1; the lower end of the outlet flow channel 42, which is connected to the inlet flow channel 41 at its upper end, is connected to the nozzle 2; a heat-conducting sleeve 6 is provided on the outside of the body 1 and outside the inlet flow channel 41 and the outlet flow channel 42; at least one heating or cooling element 61 is embedded in the heat-conducting sleeve 6; the heating or cooling element 61 in the heat-conducting sleeve 6 heats or cools the glue in the inlet flow channel 41 and the outlet flow channel 42, thereby ensuring the quality of the glue when it is sprayed out;

[0026] The main body 1 is connected to the injection valve body through a mounting block 7. The mounting block 7, which is fitted onto the outer side of the side of the heat-conducting sleeve 6 of the main body 1, has a number of grooves 81 spaced apart on its surface facing the injection valve body. Each groove 81 has a heat insulation block 82 embedded in it. The upper end surface of the heat insulation block 82 is higher than the surface of the mounting block 7 and is used to contact the surface of the injection valve body facing the mounting block 7.

[0027] The aforementioned mounting block 7 is a C-shaped mounting block, and one end of the aforementioned body 1 is embedded in the C-shaped groove formed by the C-shaped mounting block; the aforementioned heat-conducting sleeve 6 is an aluminum heat-conducting sleeve.

[0028] The lower surface of the body 1 has a mounting protrusion 51, and the nozzle 2 is mounted on the lower end face of the mounting protrusion 51 by a mounting seat 52; the mounting seat 52 with internal threads and the mounting protrusion 51 with external threads are connected by threads.

[0029] Working principle:

[0030] The entire assembly is attached to the lower end face of the spray valve body by bolts and mounting blocks. The lower end of the impact pin, which cooperates with the nozzle, is inserted into the glue dispensing channel. Through repeated impacts between the impact pin and the nozzle driven by piezoelectric ceramic, the glue in the dispensing channel is sprayed out from the lower end of the nozzle.

[0031] After assembly, the mounting block and the ceramic heat insulation ball on the mounting block can prevent the heat on the main body from being conducted to the spray valve and causing interference to the temperature-sensitive piezoelectric ceramic inside the spray valve, thus affecting the accuracy and quality of the sprayed adhesive.

[0032] Meanwhile, the adhesive in the inlet and outlet channels is heated or cooled by heating or cooling elements inside the heat-conducting sleeve to ensure the quality of the adhesive during spraying. The heating and cooling elements are purchased externally and fall within the scope of existing technology, so they will not be described in detail here.

[0033] When using the flow channel assembly of the piezoelectric ceramic jet valve, it can ensure the accuracy and quality of the glue during jetting by heating or cooling the glue flow channel, and can also avoid heat conduction affecting the performance of the jet valve when it is assembled onto the jet valve body.

[0034] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A flow channel assembly for a piezoelectric ceramic injection valve, comprising: The body (1) has an inlet channel (41) and an outlet channel (42) respectively, and a nozzle (2) is installed on the body (1). The lower end of the outlet channel (42) is connected to the nozzle (2) and the upper end is connected to the inlet channel (41). The body (1) is characterized by having a heat-conducting sleeve (6) on the outside of the body (1) and on the outside of the inlet channel (41) and the outlet channel (42). At least one heating or cooling element (61) is embedded in the heat-conducting sleeve (6). The body (1) is connected to the injection valve body through a mounting block (7). The mounting block (7) is fitted on the side of the body (1) opposite to the heat-conducting sleeve (6) and has several grooves (81) spaced apart on the surface of the injection valve body. Each groove (81) has a heat-insulating block (82) embedded in it. The upper end of the heat-insulating block (82) is higher than the surface of the mounting block (7) and is used to contact the surface of the injection valve body facing the mounting block (7).

2. The flow channel assembly of the piezoelectric ceramic injection valve according to claim 1, characterized in that: The heat insulation block (82) is a ceramic heat insulation block.

3. The flow channel assembly of the piezoelectric ceramic injection valve according to claim 1 or 2, characterized in that: The heat insulation block (82) is a spherical heat insulation block, and the groove (81) is a spherical groove.

4. The flow channel assembly of the piezoelectric ceramic injection valve according to claim 1, characterized in that: The groove (81) and the heat insulation block (82) are each provided in four places, and are respectively provided at the four corners of the mounting block (7).

5. The flow channel assembly of the piezoelectric ceramic injection valve according to claim 1, characterized in that: The mounting block (7) is a C-shaped mounting block, and one end of the body (1) is embedded in the C-shaped groove formed by the C-shaped mounting block.

6. The flow channel assembly of the piezoelectric ceramic injection valve according to claim 1, characterized in that: The heat-conducting sleeve (6) is a metal heat-conducting sleeve.

7. The flow channel assembly of the piezoelectric ceramic injection valve according to claim 1, characterized in that: The lower surface of the body (1) has a mounting protrusion (51), and the nozzle (2) is mounted on the lower end face of the mounting protrusion (51) by a mounting base (52).

8. The flow channel assembly of the piezoelectric ceramic injection valve according to claim 7, characterized in that: The mounting base (52) with internal threads is connected to the mounting protrusion (51) with external threads by threads.

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