Piston pump of self-driven hot melt glue machine

Abstract

The utility model relates to a piston pump of a self-driven hot melt adhesive machine, which comprises an air cylinder, an adhesive suction component connected with the air cylinder, an air channel conversion valve, a first magnetic body, a second magnetic body and a third magnetic body, the air cylinder drives the adhesive suction component to move, and a reversing rod of the air channel conversion valve sequentially penetrates through the first magnetic body, the second magnetic body and the third magnetic body which are arranged at intervals. The second magnetic body repels the first magnetic body and the third magnetic body in magnetism, the second magnetic body is connected with the glue suction assembly through the connecting assembly, the glue suction assembly moves to drive the second magnetic body to move in the axial direction of the reversing rod, when the glue suction assembly moves downwards, magnetic force between the second magnetic body and the third magnetic body drives the reversing rod to move downwards, and when the glue suction assembly moves upwards, the reversing rod moves downwards. Magnetic force between the first magnetic body and the second magnetic body drives the reversing rod to move upwards. The utility model does not need power supply, does not need a sealing ring, adopts mechanical sealing, is not easy to wear and is durable. Air pressure of the piston pump is more stable, and glue discharging is more uniform and stable.

Description

Technical Field

[0001] This utility model relates to the field of hot melt glue machine technology, and in particular to a piston pump for a self-driven hot melt glue machine. Background Technology

[0002] The piston pump is one of the main components of a hot melt glue machine. In traditional piston pump designs, solenoid valves and limit switches are common components, and the equipment relies on a power supply system for operation. By supplying air to the pump body, the solenoid valve controls the air circuit switch, thereby drawing the glue from the glue tank into the pump body and delivering it to the glue hose and glue gun to achieve glue application. Since high-temperature resistant sealing rings are required for sealing inside the pump body and at the glue suction rod connection, high temperatures, friction, and aging can easily cause the sealing rings to break or crack, resulting in unstable pressure and troublesome maintenance. Utility Model Content

[0003] To address the problems of existing technologies, this invention provides a piston pump for a self-driven hot melt glue machine. This pump features a high-precision mechanical air circuit switching valve, eliminates the need for sealing rings, and utilizes mechanical seals for both the suction rod and suction cylinder, resulting in wear-resistant and durable operation. This makes the piston pump's air pressure more stable and the glue dispensing more uniform and consistent.

[0004] The specific technical solution is as follows: A piston pump for a self-driven hot melt glue machine includes a cylinder and a glue suction assembly connected to the cylinder. The cylinder drives the glue suction assembly to move. The pump also includes an air path switching valve, a first magnetic body, a second magnetic body, and a third magnetic body. The reversing rod of the air path switching valve passes through the first to third magnetic bodies arranged at intervals in sequence. The second magnetic body is magnetically repelled by the first and third magnetic bodies. The second magnetic body is connected to the glue suction assembly through a connecting assembly. The movement of the glue suction assembly drives the second magnetic body to move axially along the reversing rod. When the glue suction assembly moves downward, the magnetic force between the second and third magnetic bodies drives the reversing rod to move downward. When the glue suction assembly moves upward, the magnetic force between the first and second magnetic bodies drives the reversing rod to move upward.

[0005] In some embodiments, the first to third magnetic bodies are coaxially arranged along the commutator and have the same magnetic properties.

[0006] In some embodiments, an upper magnet seat is provided above the first magnetic body, and the first magnetic body and the upper magnet seat are magnetically attracted to each other. A lower magnet seat is provided below the third magnetic body, and the third magnetic body and the lower magnet seat are magnetically attracted to each other.

[0007] In some embodiments, the two ends of the reversing rod are provided with limiting protrusions, and the first and third magnetic bodies are correspondingly arranged with the limiting protrusions.

[0008] In some embodiments, the adhesive suction assembly includes a guide rod, an adhesive suction rod, and a coupling. One end of the guide rod is connected to a cylinder, and the other end is connected to one end of the adhesive suction rod via the coupling. The other end of the adhesive suction rod is provided with an adhesive suction mechanism.

[0009] In some embodiments, the connecting assembly includes a connecting rod, one end of which is provided with a second magnetic body, and the other end is connected to a coupling.

[0010] In some embodiments, the adhesive suction mechanism includes a one-way valve disposed in the adhesive suction channel of the adhesive suction rod, which closes or opens the adhesive suction channel.

[0011] In some embodiments, the suction rod is inserted into the suction cylinder, and a conveying channel is formed between the suction rod and the suction cylinder. The conveying channel is connected to the suction channel and the glue outlet of the suction cylinder.

[0012] In some embodiments, the adhesive suction channel has an adhesive inlet, and the one-way valve includes a ball valve disposed at the adhesive inlet.

[0013] In some embodiments, a mechanical seal is used between the glue suction rod and the glue suction cylinder, and a mechanical seal is used between the reversing rod and the air chamber of the switching valve.

[0014] The technical advantages of this invention are as follows: The piston pump of the self-driven hot melt glue machine in this embodiment requires no power supply, greatly reducing the equipment's dependence on the power environment and effectively avoiding many problems caused by unstable power supply, electrical faults, and complex wiring, enabling it to operate stably under a wider range of working conditions. The mechanical seal design eliminates the need for traditional sealing ring structures, significantly improving the equipment's durability. Because there is no issue of sealing ring wear, the sealing performance of the glue suction cylinder can remain stable over a long period, thus preventing leakage caused by sealing ring wear from affecting the glue pressure. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a piston pump in a self-driven hot melt glue machine according to an embodiment of the present invention.

[0017] Figure 2 This is a utility model Figure 1 A schematic diagram of the DD section.

[0018] Figure 3 This is another schematic diagram of a piston pump for a self-driven hot melt glue machine according to an embodiment of the present invention.

[0019] Figure 4This is a utility model Figure 2 Enlarged view of part A in the middle. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0024] like Figures 1 to 4As shown, the piston pump of a self-driven hot melt glue machine in this embodiment includes a cylinder 1 and a glue-suction assembly 2 connected to the cylinder 1. The cylinder 1 drives the glue-suction assembly 2 to move. The piston pump also includes a pneumatic switching valve 3, a first magnetic body 4, a second magnetic body 5, and a third magnetic body 6. The reversing rod 31 of the pneumatic switching valve 3 passes sequentially through the first to third magnetic bodies, which are annular magnets, for easy mounting on the reversing rod 31. The pneumatic switching valve 3 is used for pneumatic switching and can be a reversing valve or other switching valve of the prior art. The second magnetic body 5 is magnetically repelled by the first and third magnetic bodies. The second magnetic body 5 is connected to the glue-suction assembly 2 through a connecting assembly 7. The movement of the glue-suction assembly 2 drives the second magnetic body 5 to move axially along the reversing rod 31. When the glue-suction assembly 2 moves downward, the magnetic force between the second and third magnetic bodies drives the reversing rod 31 to move downward. When the glue-suction assembly 2 moves upward, the magnetic force between the first and second magnetic bodies drives the reversing rod 31 to move upward. In the above technical solution, air is supplied to the air inlet 11 and delivered to the cylinder 11 through the air chamber. The cylinder drives the adhesive suction assembly 2 downward. When the second magnetic body 5 approaches the third magnetic body 6 downward, the repulsive force of the magnets causes the third magnetic body 6 to drive the reversing rod downward, thereby realizing the air path conversion. At this time, the adhesive suction assembly moves upward, allowing the adhesive to be sucked out upward with the adhesive suction assembly. When the second magnetic body 5 approaches the first magnetic body 4, it drives the reversing rod upward, and the air path is converted again, thereby realizing the self-driven adhesive suction operation. Through the above technical solution, the driving mechanism of this embodiment is based on a unique pneumatic principle. By supplying air to the air path conversion valve, the autonomous driving and control of the adhesive suction assembly is achieved with the help of a precisely designed pneumatically controlled air path conversion valve. This pneumatically controlled driving method is not only efficient but also stable, ensuring that the piston pump maintains a good working condition during long-term operation. This piston pump does not require a solenoid valve to regulate the fluid flow state, nor does it rely on a limit switch to monitor the piston stroke, thus completely eliminating the need for an external power supply. This characteristic of having no power supply requirement greatly reduces the equipment's dependence on the power environment, effectively avoiding many problems caused by unstable power supply, electrical faults and complex wiring, enabling it to operate stably under a wider range of working conditions.

[0025] In this embodiment, the first to third magnetic bodies are coaxially arranged along the reversing rod 31 and have the same magnetic properties, thereby simplifying the construction and enabling them to generate repulsive magnetic forces against each other. An upper magnet seat 41 is provided above the first magnetic body 4, and the first magnetic body 4 and the upper magnet seat 41 are magnetically attracted to each other. A lower magnet seat 61 is provided below the third magnetic body 6, and the third magnetic body 6 and the lower magnet seat 61 are magnetically attracted to each other. Through the above technical solution, when the first and third magnetic bodies approach the upper and lower magnet seats respectively, they can attract each other, thereby achieving positioning. Limiting protrusions 311 are provided at both ends of the reversing rod 31. The first and third magnetic bodies are correspondingly arranged with the limiting protrusions 311, so that the first and third magnetic bodies can abut against the corresponding limiting protrusions 311, driving the reversing rod 31 to move.

[0026] In this embodiment, the adhesive suction assembly 2 includes a guide rod 21, an adhesive suction rod 22, and a coupling 23. One end of the guide rod 21 is connected to the cylinder 1, and the other end is connected to one end of the adhesive suction rod 22 via the coupling 23. The other end of the adhesive suction rod 22 is equipped with an adhesive suction mechanism. The guide rod 21 can be a telescopic rod of the cylinder 1. The coupling 23 enables the movement of the guide rod 21 to drive the adhesive suction rod 22 to move synchronously, thereby driving the adhesive suction mechanism to move. The adhesive suction mechanism is used to absorb adhesive. The connecting assembly 7 includes a connecting rod 71. One end of the connecting rod 71 is equipped with a second magnet 5, and the other end is connected to the coupling 23, thereby enabling the coupling 23 to drive the connecting rod 71 to move synchronously.

[0027] In this embodiment, the glue suction mechanism includes a one-way valve 24, which is disposed in the glue suction channel 221 of the glue suction rod 22. The one-way valve 24 closes or opens the glue suction channel 221, thereby controlling the flow of glue. The glue suction rod 22 is inserted into the glue suction cylinder 8, forming a conveying channel 9 between the glue suction rod 22 and the glue suction cylinder 8. The conveying channel 9 communicates with both the glue suction channel 221 and the glue outlet 81 of the glue suction cylinder 8, allowing the glue in the glue suction channel 221 to be output from the glue outlet 81 after passing through the conveying channel 9. The glue suction channel 221 has an inlet 222. The one-way valve 24 includes a deflector bead 241, which is disposed at the inlet 222. Glue enters the glue suction channel 221 through the inlet 222. When the glue suction rod 22 moves upward, the deflector bead 241 falls and blocks the inlet 222, forcing the glue to the outlet, thus completing the glue delivery.

[0028] In this embodiment, a mechanical seal is used between the adhesive suction rod 22 and the adhesive suction cylinder 8, and a mechanical seal is used between the reversing rod 31 and the air chamber of the switching valve 3. The use of mechanical seals eliminates the need for sealing rings, thus avoiding the problem of pressure instability caused by friction between the guide rod and the adhesive suction rod during operation, which would lead to wear of the sealing rings. Furthermore, mechanical seals are more wear-resistant and durable, avoiding maintenance hassles.

[0029] This embodiment of a self-driven hot melt adhesive machine utilizes a piston pump that eliminates the need for solenoid valves to regulate fluid flow and avoids reliance on limit switches to monitor piston stroke, thus completely eliminating the need for an external power source. This power-free characteristic significantly reduces the equipment's dependence on the power environment, effectively avoiding numerous problems caused by unstable power supply, electrical faults, and complex wiring, enabling stable operation under a wider range of working conditions. The mechanical seal design eliminates the need for traditional sealing ring structures, greatly improving the equipment's durability. Since there is no issue of sealing ring wear, the sealing performance of the adhesive suction cylinder remains stable over a long period, preventing leaks caused by sealing ring wear from affecting the adhesive pressure. This feature ensures stable pressure during the extraction and delivery of hot melt adhesive, providing a reliable guarantee for accurate coating and stable dispensing. With its unique power-free, pneumatically controlled, and mechanically sealed design, the piston pump of this embodiment possesses significant technological advantages in the hot melt adhesive machine field, offering broad application prospects and market value, and providing a highly competitive technical solution for production process optimization and cost control in related industries.

[0030] The piston pump of a self-driven hot melt glue machine according to this utility model has been described above. However, this utility model is not limited to the specific embodiments described above. Various modifications or alterations can be made without departing from the scope of the claims. This utility model includes various modifications and alterations within the scope of the claims.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A piston pump for a self-driven hot melt adhesive machine, comprising a cylinder and a suction assembly connected to the cylinder, wherein the cylinder drives the suction assembly to move, characterized in that, It also includes a pneumatic switching valve, a first magnetic body, a second magnetic body, and a third magnetic body. The reversing rod of the pneumatic switching valve passes through the first to third magnetic bodies, which are spaced apart. The second magnetic body is magnetically repelled by the first and third magnetic bodies. The second magnetic body is connected to the adhesive suction assembly through a connecting component. When the adhesive suction assembly moves, it causes the second magnetic body to move axially along the reversing rod. When the adhesive suction assembly moves downward, the magnetic force between the second and third magnetic bodies causes the reversing rod to move downward. When the adhesive suction assembly moves upward, the magnetic force between the first and second magnetic bodies causes the reversing rod to move upward.

2. The piston pump of the self-driven hot melt glue machine according to claim 1, characterized in that, The first to third magnetic bodies are coaxially arranged along the reversing rod and have the same magnetic properties.

3. The piston pump of the self-driven hot melt glue machine according to claim 2, characterized in that, The first magnetic body is provided with an upper magnet base above it, and the first magnetic body and the upper magnet base are magnetically attracted to each other. The third magnetic body is provided with a lower magnet base below it, and the third magnetic body and the lower magnet base are magnetically attracted to each other.

4. The piston pump of the self-driven hot melt glue machine according to claim 3, characterized in that, The reversing rod has limiting protrusions at both ends, and the first and third magnetic bodies are correspondingly arranged with the limiting protrusions.

5. The piston pump of the self-driven hot melt glue machine according to claim 1, characterized in that, The adhesive suction assembly includes a guide rod, an adhesive suction rod, and a coupling. One end of the guide rod is connected to a cylinder, and the other end is connected to one end of the adhesive suction rod via the coupling. The other end of the adhesive suction rod is equipped with an adhesive suction mechanism.

6. The piston pump of the self-driven hot melt glue machine according to claim 5, characterized in that, The connecting assembly includes a connecting rod, one end of which is provided with a second magnetic body, and the other end is connected to a coupling.

7. The piston pump of the self-driven hot melt glue machine according to claim 6, characterized in that, The adhesive suction mechanism includes a one-way valve, which is installed in the adhesive suction channel of the adhesive suction rod to close or open the adhesive suction channel.

8. The piston pump of the self-driven hot melt glue machine according to claim 7, characterized in that, The suction rod is inserted into the suction cylinder, and a conveying channel is formed between the suction rod and the suction cylinder. The conveying channel is connected to the suction channel and the glue outlet of the suction cylinder.

9. The piston pump of the self-driven hot melt glue machine according to claim 8, characterized in that, The adhesive suction channel has an adhesive inlet, and the one-way valve includes a ball valve, which is located at the adhesive inlet.

10. The piston pump of the self-driven hot melt glue machine according to claim 9, characterized in that, A mechanical seal is used between the glue suction rod and the glue suction cylinder, and a mechanical seal is used between the reversing rod and the air chamber of the switching valve.

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