High-viscosity adhesive internal meshing type gear pump and adhesive supply system

Abstract

The invention discloses a high viscosity adhesive internal meshing type gear pump and an adhesive supply system, the gear pump is used for conveying a high viscosity adhesive, the gear pump comprises a gear assembly and a pump body, the pump body is internally provided with a first adhesive inlet channel, a second adhesive inlet channel and an adhesive outlet channel, the first adhesive inlet channel and the second adhesive inlet channel are communicated with different sides of an adhesive inlet cavity, and the first adhesive inlet channel and the second adhesive inlet channel are communicated with the adhesive outlet channel. An adhesive enters the pump body through the adhesive inlet and then enters the adhesive inlet cavity through the first adhesive inlet channel and the second adhesive inlet channel, the adhesive inlet cavity receives the adhesive introduced by the two channels at the same time, and the first adhesive inlet channel and the second adhesive inlet channel are communicated to different sides of the adhesive inlet cavity, so that the adhesive receiving range of the adhesive inlet cavity is enlarged, and the adhesive receiving efficiency is improved. The feeding amount of the adhesive into the adhesive feeding cavity is increased, the adhesive is conveyed through the internally-meshed gear pump, flow pulsation in the conveying process can be reduced, continuous and stable conveying of the adhesive is achieved, and meanwhile the conveying precision of the adhesive is improved.

Description

Technical Field

[0001] This invention relates to the field of high-viscosity colloid conveying and supply technology, and in particular to a high-viscosity adhesive internal gear pump and supply system. Background Technology

[0002] High-viscosity adhesives have poor flowability, making it difficult for them to enter the pump chamber when transported by a pump. This results in poor delivery of the adhesive. Since the amount of adhesive entering the pump chamber is limited and unstable, precise delivery of the adhesive cannot be achieved. Summary of the Invention

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an internal gear pump for high-viscosity adhesives, which can improve the delivery stability and delivery accuracy of adhesives.

[0004] The present invention also proposes an adhesive supply system having an internal gear pump for the aforementioned high-viscosity adhesive.

[0005] According to a first aspect of the present invention, a high-viscosity adhesive internal gear pump is used for conveying high-viscosity adhesive, comprising a gear assembly and a pump body. The gear assembly includes an internal gear, an external gear ring, and a crescent plate. The internal gear is embedded inside the external gear ring and partially meshes with it. The crescent plate is disposed between the internal gear and the external gear ring and isolates an adhesive inlet chamber and an adhesive outlet chamber. The gear assembly is located inside the pump body, which has a first adhesive inlet channel, a second adhesive inlet channel, and an adhesive outlet channel. One end of the first adhesive inlet channel extends to the edge of the pump body and forms an adhesive inlet. The other end of the first adhesive inlet channel communicates with the adhesive inlet chamber. One end of the second adhesive inlet channel communicates with the first adhesive inlet channel and the other end communicates with the adhesive inlet chamber. The first adhesive inlet channel and the second adhesive inlet channel communicate on different sides of the adhesive inlet chamber. One end of the adhesive outlet channel communicates with the adhesive inlet chamber, and the other end extends to the edge of the pump body and forms an adhesive outlet.

[0006] The high-viscosity adhesive internal gear pump according to embodiments of the present invention has at least the following beneficial effects: After the adhesive enters the pump body through the inlet, it enters the inlet chamber through the first and second inlet channels. The inlet chamber simultaneously receives adhesive introduced from both channels. The first and second inlet channels are connected to different sides of the inlet chamber, increasing the range of adhesive that the inlet chamber can receive, thereby further increasing the amount of adhesive entering the inlet chamber. Due to the suction force generated by the gear assembly at the inlet chamber, the adhesive will continuously enter the inlet chamber through the two channels, and then be transferred to the outlet chamber by the gear assembly, and discharged from the outlet through the outlet channel. Using an internally meshing gear pump for adhesive delivery can reduce flow pulsation during the delivery process, achieve continuous and stable delivery of adhesive, and improve the delivery accuracy of adhesive.

[0007] According to some embodiments of the present invention, the first glue inlet channel and the second glue inlet channel are respectively connected to opposite sides of the glue inlet cavity along the axial direction of the gear assembly.

[0008] According to some embodiments of the present invention, the glue inlet is located at the bottom of the pump body, the first glue inlet channel communicates with the lower part of the glue inlet cavity, the second glue inlet channel communicates with the upper part of the glue inlet cavity, and the rotation axis of the gear assembly extends vertically.

[0009] According to some embodiments of the present invention, the high viscosity adhesive internal gear pump further includes a pump chamber cover plate assembly, the gear assembly being rotatably connected within the pump chamber cover plate assembly, the pump chamber cover plate assembly including a first cover plate and a second cover plate arranged along the axial direction of the gear assembly; The first cover plate has a first glue inlet groove and a glue outlet groove. The first glue inlet groove connects the second glue inlet channel and the glue inlet cavity. The glue outlet groove connects the glue outlet channel and the glue outlet cavity. The second cover plate has a second glue inlet groove, which connects the first glue inlet channel and the glue inlet cavity.

[0010] According to some embodiments of the present invention, the projection of the glue inlet cavity onto the projection plane is located inside the projection of the first glue inlet groove onto the projection plane, and the projection plane is perpendicular to the axis of the gear assembly; And / or, the projection of the glue inlet cavity onto the projection plane is located inside the projection of the second glue inlet groove onto the projection plane, and the projection plane is perpendicular to the axis of the gear assembly.

[0011] According to some embodiments of the present invention, the projection of the gear assembly onto the projection plane is located inside the projection of the inlet onto the projection plane, and the projection plane is perpendicular to the axial direction of the gear assembly; And / or, the projection of the inlet onto the projection plane is located inside the projection of the pump chamber cover assembly onto the projection plane, and the projection plane is perpendicular to the axial direction of the gear assembly.

[0012] According to some embodiments of the present invention, the opening of the first glue inlet channel gradually decreases along the direction extending from the first glue inlet channel toward the glue inlet cavity.

[0013] According to some embodiments of the present invention, the first glue inlet channel includes a first channel segment and a second channel segment, one end of the first channel segment forms the glue inlet, the other end of the first channel segment communicates with the second channel segment, and the end of the second channel segment facing away from the first channel segment communicates with the glue inlet cavity; along the direction of the first channel segment toward the glue inlet cavity, the opening of the first channel segment gradually decreases; One end of the second glue inlet channel forms a connecting port, and the connecting port is connected to the first glue inlet channel. The connecting port is connected to the side of the first channel segment and the second channel segment.

[0014] According to some embodiments of the present invention, the first channel segment includes a guide portion and an adhesive inlet portion, the guide portion and the adhesive inlet portion being distributed along the arrangement direction of the first channel segment and the communication port, and one end of the second adhesive inlet channel extending to the adhesive inlet portion; The inner wall of the guide portion is inclined toward the center of the first glue inlet channel along the direction from the glue inlet to the glue inlet cavity; the glue inlet portion is recessed relative to the guide portion, and the end of the glue inlet portion facing away from the glue inlet is connected to the second channel segment.

[0015] According to some embodiments of the present invention, the projection of the second channel segment onto the projection plane is located inside the projection of the glue inlet portion onto the projection plane, and the projection plane is perpendicular to the axial direction of the gear assembly; And / or, along the direction from the first channel segment toward the second channel segment, the opening of the second channel segment first gradually decreases and then gradually increases.

[0016] According to some embodiments of the present invention, the high-viscosity adhesive internal gear pump further includes a heating component disposed on the periphery of the dispensing channel and used to heat the high-viscosity adhesive in the dispensing channel.

[0017] According to a second aspect of the present invention, a glue supply system includes: The high-viscosity adhesive internal gear pump in the first aspect embodiment; A material cylinder is used to store high-viscosity adhesive, and an internal gear pump for the high-viscosity adhesive is placed inside the material cylinder, with the adhesive inlet located at the bottom of the pump body; A drive assembly is connected to the high-viscosity adhesive internal gear pump and drives the high-viscosity adhesive internal gear pump to rise and fall, so that the inlet rises and falls with the liquid level change of the high-viscosity adhesive and contacts the high-viscosity adhesive.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a cross-sectional view of an embodiment of the high-viscosity adhesive internal gear pump of the present invention; Figure 2 for Figure 1 A cross-sectional view of an internal gear pump for medium-to-high viscosity adhesives along direction AA. Figure 3 This is an exploded schematic diagram of a portion of the structure in the high-viscosity adhesive internal gear pump of the present invention; Figure 4 Cross-sectional view of gear assembly, pump chamber cover plate assembly and part of pump body; Figure 5 for Figure 4 Enlarged view at point B in the middle; Figure 6 An exploded view of the pump chamber cover assembly and part of the pump body; Figure 7 This is a schematic diagram of an embodiment of the adhesive supply system of the present invention, in which a partial cross-sectional view is provided of a portion of the structure inside the barrel; Figure 8 This is a schematic diagram of the glue supply system from another direction, with the material cylinder hidden.

[0020] Figure label: Gear pump 10, gear assembly 100, internal gear 110, external gear ring 120, crescent plate 130, glue inlet chamber 140, glue outlet chamber 150; Pump body 200, first glue inlet channel 210, first channel section 211, guide part 2111, glue inlet part 2112, second channel section 212, second glue inlet channel 220, horizontal section 221, vertical section 222, connecting port 223, glue outlet channel 230, glue inlet 240, glue outlet 250, first base 260, second base 270, third base 280; Pump chamber cover assembly 300, first cover 310, first glue inlet groove 311, glue outlet groove 312, second cover 320, second glue inlet groove 321; Drive shaft 400; Heating component 500; Exhaust assembly 600; 20 barrel, 21 inner cavity, 30 drive assembly, 40 base, 50 base, 60 drive component. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0023] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0025] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] High-viscosity adhesives have poor flowability, making it difficult for them to enter the pump chamber when transported by a pump. This results in poor delivery of the adhesive. Since the amount of adhesive entering the pump chamber is limited and unstable, it affects the delivery accuracy of the adhesive and is detrimental to production after delivery. For example, when delivering adhesive to a dispensing equipment, it will affect the stability of the dispensing and the quality of the dispensing.

[0027] Therefore, embodiments of this application provide a high-viscosity adhesive internal gear pump 10 (hereinafter referred to as gear pump 10) for conveying high-viscosity adhesives (hereinafter referred to as adhesives), referring to... Figure 1 ( Figure 1 (The dashed line and arrow indicate the flow path and direction of the adhesive) Figure 2 The gear pump 10 includes a gear assembly 100 and a pump body 200, with the gear assembly 100 located inside the pump body 200. The gear assembly 100 includes an internal gear 110, an external gear ring 120, and a crescent plate 130. The internal gear 110 is embedded inside the external gear ring 120. Both the outer periphery of the internal gear 110 and the inner side of the external gear ring 120 are provided with meshing teeth. Some of the meshing teeth of the internal gear 110 mesh with the external gear ring 120, making the gear assembly 100 have an internal meshing shape. There is a gap between the outer periphery of the internal gear 110 and the inner side of the external gear ring 120. The crescent plate 130 is located between the internal gear 110 and the external gear ring 120 to separate the space between the internal gear 110 and the external gear ring 120 into an inlet cavity 140 and an outlet cavity 150.

[0028] When the internal gear 110 rotates, the external gear ring 120 rotates synchronously with it in the same direction. In the glue inlet cavity 140, the outer side of the internal gear 110 separates from the inner side of the external gear ring 120, creating a negative pressure that draws in the adhesive. As the adhesive is transferred to the glue outlet cavity 150 along with the rotation of the internal gear 110 and the external gear ring 120, the meshing teeth of the internal gear 110 continuously mesh with the external gear ring 120, extruding the adhesive. Therefore, using an internally meshing gear pump 10 for adhesive delivery reduces flow pulsation during the delivery process, resulting in a more stable adhesive output and improved output accuracy.

[0029] In addition, in this embodiment, the pump body 200 is provided with a first glue inlet channel 210, a second glue inlet channel 220 and a glue outlet channel 230. One end of the first glue inlet channel 210 extends to the edge of the pump body 200 and forms a glue inlet 240. The other end of the first glue inlet channel 210 is connected to the glue inlet cavity 140. One end of the second glue inlet channel 220 is connected to the first glue inlet channel 210 and the other end is connected to the glue inlet cavity 140. One end of the glue outlet channel 230 is connected to the glue inlet cavity 140 and the other end extends to the edge of the pump body 200 and forms a glue outlet 250. Thus, after the adhesive enters the pump body 200 through the inlet 240, it enters the inlet chamber 140 through the first inlet channel 210 and the second inlet channel 220 respectively. The inlet chamber 140 simultaneously receives the adhesive introduced by the two channels, which can increase the amount of adhesive entering the inlet chamber 140. Under the suction force formed by the gear assembly 100 at the inlet chamber 140, the adhesive will continuously enter the inlet chamber 140 through the two channels, and then be transferred to the outlet chamber 150 by the conveying of the gear assembly 100, and discharged from the outlet 250 through the outlet channel 230, realizing continuous and stable delivery of adhesive, while improving the delivery accuracy of adhesive.

[0030] It should be noted that, due to the specifications of the gear assembly 100, the length of the glue inlet cavity 140 in the radial and circumferential directions of the gear assembly 100 is limited. It is difficult to increase the amount of adhesive entering the glue inlet cavity 140 by increasing its volume. If the adhesive is only introduced from one side of the glue inlet cavity 140, the area within which the glue inlet cavity 140 can receive the adhesive is limited, and the adhesive has poor flowability, resulting in insufficient amount of adhesive entering the glue inlet cavity 140. This application addresses this by providing a first glue inlet channel 210 and a second glue inlet channel 220, both of which introduce adhesive into the glue inlet cavity 140. Furthermore, the first glue inlet channel 210 and the second glue inlet channel 220 are connected to different sides of the glue inlet cavity 140, thereby increasing the area within which the glue inlet cavity 140 can receive the adhesive and further improving the amount of adhesive entering the glue inlet cavity 140.

[0031] The first glue inlet channel 210 and the second glue inlet channel 220 can connect to different sides of the glue inlet cavity 140, either adjacent sides or opposite sides. For example, the first glue inlet channel 210 connects to one side of the glue inlet cavity 140 along the axial direction of the gear assembly 100, and the second glue inlet channel 220 connects to one side of the glue inlet cavity 140 along the radial direction of the gear assembly 100; thus, adhesive can enter the glue inlet cavity 140 from one side along the axial direction of the gear assembly 100, and simultaneously enter the glue inlet cavity 140 from one side along the radial direction of the gear assembly 100 through the gap between adjacent meshing teeth of the external gear ring 120, ensuring sufficient glue volume in the glue inlet cavity 140. Alternatively, as... Figure 1As shown, the first glue inlet channel 210 and the second glue inlet channel 220 are respectively connected to the glue inlet cavity 140 on opposite sides along the axial direction of the gear assembly 100. In this case, the glue inlet cavity 140 is unobstructed on both sides along the axial direction of the gear assembly 100 and is safely in an open state to receive adhesives introduced by the first glue inlet channel 210 and the second glue inlet channel 220 respectively, effectively increasing the range of adhesives that the glue inlet cavity 140 can receive, thereby increasing the amount of adhesive entering the glue inlet cavity 140.

[0032] Reference Figure 1 and Figure 3 The gear pump 10 also includes a pump chamber cover assembly 300, which is disposed within the pump body 200 and fixed relative to the pump body 200. The gear assembly 100 is rotatably connected within the pump chamber cover assembly 300. The pump chamber cover assembly 300 includes a first cover plate 310 and a second cover plate 320 arranged along the axial direction of the gear assembly 100. The external gear ring 120 and the internal gear 110 are axially positioned between the first cover plate 310 and the second cover plate 320 and are rotatable relative to the first cover plate 310 and the second cover plate 320. Figure 5 and Figure 6 The first cover plate 310 has a first glue inlet groove 311 and a glue outlet groove 312. The first glue inlet groove 311 is connected to the second glue inlet channel 220 and the glue inlet cavity 140. The glue outlet groove 312 is connected to the glue outlet channel 230 and the glue outlet cavity 150. The second cover plate 320 has a second glue inlet groove 321, which is connected to the first glue inlet channel 210 and the glue inlet cavity 140. The adhesive entering the pump body 200 from the glue inlet 240 enters the first glue inlet channel 210 and the second glue inlet channel 220 respectively. The adhesive enters the glue inlet cavity 140 from the first glue inlet channel 210 through the second glue inlet groove 321, and enters the glue inlet cavity 140 from the second glue inlet channel 220 through the first glue inlet groove 311. After being conveyed by the gear assembly 100, it enters the glue outlet groove 312 from the glue outlet cavity 150, and then enters the glue outlet channel 230, and is then discharged from the glue outlet 250.

[0033] The first glue inlet groove 311 and the second glue inlet groove 321 are respectively located on opposite sides of the glue inlet cavity 140 along the axial direction of the gear assembly 100. The side of the glue inlet cavity 140 along the axial direction of the gear assembly 100 is completely exposed to the first glue inlet groove 311 or the second glue inlet groove 321 and directly receives the adhesive conveyed by the first glue inlet groove 311 and the second glue inlet groove 321. The glue inlet cavity 140 has a large range for receiving adhesive, which can increase the amount of adhesive entering the glue inlet cavity 140.

[0034] Furthermore, since the external gear ring 120 and the internal gear 110 are axially confined between the first cover plate 310 and the second cover plate 320 along the gear assembly 100, on the one hand, the external gear ring 120 and the internal gear 110 only have rotational freedom, making the operation of the gear assembly 100 more stable. On the other hand, the glue inlet chamber 140 is only connected to the first glue inlet groove 311 or the second glue inlet groove 321 along the axial direction of the gear assembly 100, and the glue outlet chamber 150 can only be connected to the glue outlet groove 312 along the axial direction of the gear assembly 100. Therefore, the adhesive in the first glue inlet groove 311 and the second glue inlet groove 321 is only delivered to the glue inlet chamber 140, and the adhesive in the glue outlet chamber 150 can only be discharged from the glue outlet groove 312, reducing the flow or leakage of adhesive to other areas of the pump body 200, maintaining a good seal between the gear assembly 100, the pump chamber cover plate assembly 300 and the pump body 200, and improving the delivery efficiency of the adhesive.

[0035] The gear pump 10 also includes a drive shaft 400, which is connected to a drive component 60 and rotates under the drive of the drive component 60. The drive component 60 is not limited to being a motor. The drive shaft 400 is inserted into the pump body 200 and connected to an internal gear 110 to drive the internal gear 110 to rotate, thereby realizing the delivery of adhesive by the gear assembly 100. The drive shaft 400 passes through the first cover plate 310 and the second cover plate 320. A bearing that rotates with the drive shaft 400 can also be provided in the pump body 200 to make the drive of the gear assembly 100 by the drive shaft 400 smoother. A seal is also provided between the outer periphery of the drive shaft 400 and the pump body 200 to isolate the adhesive and prevent the adhesive from leaking outward. The seal can be provided on the side of the first cover plate 310 facing away from the second cover plate 320.

[0036] In one embodiment, such as Figure 1As shown, the rotation axis of the gear assembly 100 extends vertically, and the glue inlet cavity 140 extends vertically through the gear assembly 100. The upper and lower parts of the glue inlet cavity 140 are exposed. The second glue inlet groove 321 is located below the glue inlet cavity 140, and the first glue inlet groove 311 is located above the glue inlet cavity 140. The glue inlet 240 is located at the bottom of the pump body 200. The first glue inlet channel 210 extends vertically. The lower end of the first glue inlet channel 210 connects to the lower part of the glue inlet 240, and the upper end connects to the glue inlet cavity 140. One end of the second glue inlet channel 220 connects to the side of the first glue inlet channel 210, and the other end connects to the glue inlet cavity 140. Above the glue chamber 140; thus, the adhesive enters the pump body 200 from below through the glue inlet 240. The adhesive first enters the first glue inlet channel 210. At the intersection of the first glue inlet channel 210 and the second glue inlet channel 220, a portion of the adhesive continues to flow upward and enters the second glue inlet groove 321, and then enters the glue chamber 140 from below. Another portion of the adhesive enters the second glue inlet channel 220 and flows through the second glue inlet channel 220 to the first glue inlet groove 311, and then enters the glue chamber 140 from above. Thus, the adhesives conveyed by the first glue inlet channel 210 and the second glue inlet channel 220 enter the glue inlet cavity 140 from above and below, respectively. The glue inlet cavity 140 directly receives the two streams of adhesive on both sides along the axial direction. The glue inlet cavity 140 has a large range for receiving adhesive, which increases the amount of adhesive entering the glue inlet cavity 140. It can be understood that by setting the glue inlet 240 at the bottom of the pump body 200 in this embodiment, the gear pump 10 only needs to contact the bottom surface of the adhesive to be conveyed to allow the adhesive to be drawn into the pump body 200 through the glue inlet 240, which can reduce the conveying loss of adhesive and the corrosion of other areas of the pump body 200.

[0037] Furthermore, the second glue inlet channel 220 is configured in a curved shape. For example, the second glue inlet channel 220 is arc-shaped, with its lower end connected to the side of the first glue inlet channel 210 and its upper end connected to the top of the glue inlet cavity 140. By configuring the second glue inlet channel 220 in an arc shape, the interior of the second glue inlet channel 220 is smooth, which can reduce the resistance to adhesive delivery and reduce adhesive residue in the channel. Of course, the second glue inlet channel 220 can also be configured in a zigzag shape, for example... Figure 1 and Figure 4In the illustrated embodiment, the second glue inlet channel 220 includes two horizontal segments 221 and one vertical segment 222. The vertical segment 222 tends to extend vertically, and the horizontal segment 221 tends to extend horizontally. The two horizontal segments 221 are spaced apart and arranged side by side. One end of each horizontal segment 221 is connected to the upper and lower ends of the vertical segment 222, respectively. The other end of the upper horizontal segment 221 is connected to the first glue inlet groove 311, and the other end of the lower horizontal segment 221 is connected to the side of the first glue inlet channel 210. The adhesive passes through the lower horizontal segment 221, the vertical segment 222, and the upper horizontal segment 221 in sequence and enters the glue inlet cavity 140 from above. Since the second glue inlet channel 220 is composed of the horizontal segment 221 and the vertical segment 222, the processing of the second glue inlet channel 220 is more convenient.

[0038] In one specific embodiment, refer to Figure 3 and Figure 4 The pump body 200 includes a first base 260 and a second base 270, which are interlocked vertically. The first base 260 is located below the second base 270, and a seal is provided at the joint between the first base 260 and the second base 270 to prevent adhesive leakage. A first adhesive inlet channel 210 is located on the first base 260. The lower half of the horizontal section 221 and the lower half of the vertical section 222 are located on the first base 260, and the upper half of the horizontal section 221 and the upper half of the vertical section 222 are located on the second base 270. Thus, by assembling the first base 260 and the second base 270, the gear assembly 100 can be installed into the housing, and the gear assembly 100 can be positioned. The first adhesive inlet channel 210 and the second adhesive inlet channel 220 are respectively connected to the upper and lower sides of the adhesive inlet cavity 140. Further, as... Figure 1 and Figure 3 As shown, the pump body 200 may also include a third base 280, which is connected to the first base 260. A portion of the glue outlet channel 230 is located in the third base 280, thereby enabling the glue outlet channel 230 to cooperate with the glue outlet cavity 150.

[0039] In one embodiment, the projection of the glue inlet cavity 140 onto the projection plane is located inside the projection of the first glue inlet groove 311 onto the projection plane, and the projection plane is perpendicular to the axis of the gear assembly 100; thus, each area of ​​the glue inlet cavity 140 facing the first glue inlet groove 311 is within the glue inlet range of the first glue inlet groove 311, and the adhesive conveyed by the first glue inlet groove 311 can flow to any area of ​​the glue inlet cavity 140, so as to make full use of the adhesive receiving range of the glue inlet cavity 140 facing the first glue inlet groove 311, so that more adhesive can enter the glue inlet cavity 140 from the first glue inlet groove 311, thereby increasing the amount of adhesive entering the glue inlet cavity 140.

[0040] Similarly, the projection of the glue inlet cavity 140 onto the projection plane is located inside the projection of the second glue inlet groove 321 onto the projection plane, and the projection plane is perpendicular to the axis of the gear assembly 100; thus, each area of ​​the glue inlet cavity 140 facing the second glue inlet groove 321 is within the glue inlet range of the second glue inlet groove 321, and the adhesive conveyed by the second glue inlet groove 321 can flow to any area of ​​the glue inlet cavity 140, so as to make full use of the adhesive receiving range of the glue inlet cavity 140 facing the second glue inlet groove 321, so that more adhesive can enter the glue inlet cavity 140 from the second glue inlet groove 321, thereby increasing the amount of adhesive entering the glue inlet cavity 140.

[0041] In one embodiment, along the direction extending from the first glue inlet channel 210 toward the glue inlet cavity 140, the opening of the first glue inlet channel 210 gradually decreases, so that the first glue inlet channel 210 toward the glue inlet cavity 140 presents a constricted shape. On the one hand, the glue inlet 240 has a large glue inlet range, allowing more adhesive to enter the pump body 200 through the glue inlet 240. On the other hand, the first glue inlet channel 210 guides the flow of adhesive, guiding the adhesive to flow into the interior of the pump body 200 and enabling it to flow smoothly into the glue inlet cavity 140.

[0042] The first glue inlet channel 210, either entirely or partially, can be configured in a flared shape. For example, the portion of the first glue inlet channel 210 near the glue inlet 240 can be configured in a flared shape, giving the glue inlet 240 a larger glue inlet range. Figure 1 As shown, when the axis of the gear assembly 100 extends vertically, the opening of the first glue inlet channel 210 gradually increases from bottom to top, and the glue inlet 240 located at the lower end of the first glue inlet channel 210 has a large glue inlet range.

[0043] In one embodiment, the projection of the gear assembly 100 onto the projection plane is located inside the projection of the glue inlet 240 onto the projection plane, and the projection plane is perpendicular to the axial direction of the gear assembly 100. It is understood that the glue inlet cavity 140 and the glue outlet cavity 150 are located on both sides of the crescent plate 130, and the glue inlet cavity 140 is arranged radially along one side of the gear assembly 100. In this application, the glue inlet range of the glue inlet 240 is not completely aligned with the glue inlet 240 along the axial direction of the gear assembly 100, but the glue inlet range of the glue inlet 240 is expanded so that the glue inlet range of the glue inlet 240 is larger than the radial area of ​​the gear assembly 100. In this way, more adhesive can enter the pump body 200 from the glue inlet 240, and then be further diverted in the pump body 200, and enter the glue inlet cavity 140 through the first glue inlet channel 210 and the second glue inlet channel 220 respectively.

[0044] It should be noted that by expanding the range of the inlet 240, the amount of adhesive entering the pump body 200 through the inlet 240 increases, thereby ensuring that a sufficient amount of adhesive can enter the pump body 200. After the adhesive enters the first inlet channel 210 through the inlet 240, it will be guided by the first inlet channel 210 and guided to the area directly below the inlet cavity 140, where it will be further diverted. Since there is a sufficient amount of adhesive entering the pump body 200, through the diversion and guidance of the first inlet channel 210 and the second inlet channel 220, the sufficient amount of adhesive in the pump body 200 can be delivered to the inlet cavity 140 and enter from the upper and lower sides of the inlet cavity 140 respectively, thereby ensuring the amount of adhesive entering the inlet cavity 140.

[0045] In addition, the projection of the inlet 240 onto the projection plane can be further configured such that the projection of the pump chamber cover assembly 300 onto the projection plane is located inside the projection of the pump chamber cover assembly 300 onto the projection plane, and the projection plane is perpendicular to the axis of the gear assembly 100; that is, the inlet range of the inlet 240 is smaller than the radial area of ​​the pump chamber cover assembly 300, so as to avoid the inlet 240 being too large, which would cause the flow path of the adhesive to the inlet chamber 140 to be too long and affect the delivery efficiency of the adhesive.

[0046] In one embodiment, such as Figure 5 As shown, the first glue inlet channel 210 includes a first channel segment 211 and a second channel segment 212. The first channel segment 211 and the second channel segment 212 are distributed along the extension direction of the first glue inlet channel 210. One end of the first channel segment 211 forms a glue inlet 240, and the other end of the first channel segment 211 is connected to the second channel segment 212. The end of the second channel segment 212 facing away from the first channel segment 211 is connected to the glue inlet cavity 140. Thus, the adhesive entering the pump body 200 from the glue inlet 240 can sequentially pass through the first channel segment 211, the second channel segment 212, and the second glue inlet groove 321 before entering the glue inlet cavity 140. One end of the second glue inlet channel 220 forms a connecting port 223, which connects to the first glue inlet channel 210. The connecting port 223 connects to the side of the first channel segment 211 and the second channel segment 212. Thus, as the adhesive flows sequentially to the first channel segment 211 and the second channel segment 212, it can enter the second glue inlet channel 220 through the connecting port 223. At the same time, along the direction of the first channel segment 211 toward the glue inlet cavity 140, the opening of the first channel segment 211 gradually decreases. That is, the adhesive that enters the first channel segment 211 through the glue inlet 240 flows toward the second channel segment 212 and the connecting port 223 under the guidance of the first channel segment 211. This makes the flow of adhesive at the connecting port 223 smoother and more thorough, ensuring that the preset amount of adhesive can enter the second glue inlet channel 220. The amount of adhesive entering the first glue inlet channel 210 and the second glue inlet channel 220 is more balanced, thereby further increasing the glue inlet volume of the glue inlet cavity 140.

[0047] Furthermore, the first channel segment 211 includes a guide portion 2111 and an adhesive inlet portion 2112, which are distributed along the arrangement direction of the first channel segment 211 and the connecting port 223. One end of the second adhesive inlet channel 220 extends to the adhesive inlet portion 2112. In some embodiments, the arrangement direction of the guide portion 2111 and the adhesive inlet portion 2112 may be the same as the arrangement direction of the adhesive inlet cavity 140 and the adhesive outlet cavity 150. The inner wall of the guide portion 2111 is inclined towards the center of the first glue inlet channel 210 along the direction from the glue inlet 240 toward the glue inlet cavity 140, thereby guiding the flow of adhesive. The glue inlet portion 2112 is recessed relative to the guide portion 2111 toward the glue inlet cavity 140, and the end of the glue inlet portion 2112 facing away from the glue inlet 240 is connected to the second channel section 212. Thus, the glue inlet portion 2112, the second channel section 212, the second glue inlet groove 321, and the glue inlet cavity 140 are opposite each other along the axial direction of the gear assembly 100, passing through the glue inlet 240. The adhesive entering the pump body 200 is guided by the guide part 2111 and flows towards the glue inlet 2112. Since the glue inlet 2112 is recessed relative to the guide part 2111, it can prevent the adhesive from flowing back to the guide part 2111. This allows the adhesive entering the glue inlet 2112 to be fully delivered to the second channel section 212 and the second glue inlet channel 220. At the same time, it can flow smoothly in a straight line to the second channel section 212 and the second glue inlet groove 321, and then enter the glue inlet cavity 140, making the delivery of the adhesive more thorough and smooth.

[0048] Furthermore, the projection of the second channel segment 212 onto the projection plane is located inside the projection of the glue inlet 2112 onto the projection plane. The projection plane is perpendicular to the axis of the gear assembly 100, so the opening of the second channel segment 212 is smaller than the opening of the glue inlet 2112. This prevents excessive adhesive from entering the second channel segment 212 through the guide 2111, which would result in insufficient glue inlet amount in the second glue inlet channel 220. The constraint of the second channel segment 212 makes the delivery amount of the first glue inlet channel 210 and the second glue inlet channel 220 to the glue inlet cavity 140 more balanced.

[0049] In one embodiment, along the direction from the first channel segment 211 toward the second channel segment 212, the opening of the second channel segment 212 gradually decreases and then gradually increases. On the one hand, the second channel segment 212 introduces the adhesive into the glue inlet 2112 and continues to guide it toward the glue inlet cavity 140, making the flow of adhesive from the first channel segment 211 to the second channel segment 212 smoother. On the other hand, the second channel segment 212 has a larger range for receiving adhesive, which can accommodate more adhesive, so that each area of ​​the glue inlet cavity 140 receives adhesive, thereby increasing the amount of adhesive entering the glue inlet cavity 140.

[0050] In this application, the second glue inlet channel 220 and the glue outlet channel 230 are respectively disposed on opposite sides of the gear assembly 100. In one embodiment, the arrangement direction of the second glue inlet channel 220 and the glue outlet channel 230 is the same as the arrangement direction of the glue inlet cavity 140 and the glue outlet cavity 150, so as to facilitate the second glue inlet channel 220 to cooperate with the glue inlet cavity 140 and introduce adhesive into the glue inlet cavity 140, and to facilitate the glue outlet channel 230 to cooperate with the glue outlet cavity 150, so that the glue outlet cavity 150 leads out adhesive to the glue outlet channel 230.

[0051] In one embodiment, reference is made to Figure 1 The gear pump 10 also includes a heating component 500, which is located on the periphery of the dispensing channel 230 and is used to heat the adhesive in the dispensing channel 230, so that the adhesive can keep flowing in the dispensing channel 230, ensuring that the adhesive can be smoothly discharged from the dispensing port 250, and avoiding the adhesive from sticking or solidifying.

[0052] The heating component 500 can be arranged around the periphery of the dispensing channel 230 to increase the heating range of the heating component 500 and make the adhesive in the dispensing channel 230 heated evenly. For example, the heating component 500 is a heating wire that is spirally wound around the outer periphery of the dispensing channel 230; or, the heating component 500 includes a plurality of heating rods that are arranged along the extension direction of the dispensing channel 230 so that the adhesive is heated throughout the entire dispensing channel 230.

[0053] In some embodiments, reference is made to Figure 3 The gear pump 10 is also equipped with an exhaust assembly 600, which is connected to an exhaust channel connected to the glue outlet channel 230, and is used to vent the gas in the gear pump 10 when changing the material cylinder 20 or when conveying new glue.

[0054] This application also provides an adhesive supply system, such as Figure 7 and Figure 8 As shown, the adhesive supply system includes the gear pump 10 mentioned above, as well as a barrel 20 and a drive assembly 30. The barrel 20 has an inner cavity 21 for storing adhesive. The gear pump 10 is placed in the inner cavity 21, and the inlet 240 is located at the bottom of the pump body 200. The drive assembly 30 is connected to the gear pump 10 and drives the gear pump 10 to rise and fall, so that the inlet 240 rises and falls with the change of the liquid level of the adhesive, so that the inlet 240 is always in contact with the adhesive, so that the gear pump 10 can draw the adhesive into the pump body 200 and then discharge the adhesive from the outlet 250, thus completing the output of the adhesive in the barrel 20.

[0055] In some embodiments, the adhesive supply system further includes a base 40 and a base 50. The barrel 20 is fixed above the base 40, and the base 50 is located above the barrel 20. A drive component 60 is mounted on the base 50. The upper end of the drive shaft 400 is connected to the drive component 60, and the lower end is connected to the gear assembly 100, so that the gear pump 10 is suspended inside the barrel 20. The drive component 30 is not limited to driving the base 50 to rise and fall through a screw mechanism, hydraulic cylinder, etc. The upper end of the drive component 30 is the drive end and is connected to the base 50. The base 50 is driven by the drive component 30 to drive the gear pump 10 to rise and fall. Understandably, in the initial state, the adhesive level in the barrel 20 is high, and the inlet 240 is at a high position. As the adhesive in the barrel 20 is continuously output by the gear pump 10, the adhesive level gradually decreases. During this process, the drive component 30 drives the gear pump 10 to continuously descend, so that the height of the inlet 240 matches the adhesive level.

[0056] As one application scenario for adhesive supply systems, adhesive supply systems can be applied in the production of insulated glass. For example, the adhesive outlet 250 of the adhesive supply system is connected to the coating equipment through a pipeline. The adhesive is transported to the coating equipment through the pipeline, and the coating equipment coats the spacer strips on the glass. Since the gear pump 10 delivers the adhesive stably and with high precision, it can achieve high-precision and high-reliability coating of the spacer strips, meeting the high convenience and high efficiency requirements of insulated glass production.

[0057] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. An internal gear pump for conveying high-viscosity adhesives, characterized in that, include: A gear assembly includes an internal gear, an external gear ring, and a crescent plate. The internal gear is embedded inside the external gear ring and partially meshes with it. The crescent plate is located between the internal gear and the external gear ring and separates the glue inlet cavity and the glue outlet cavity. The pump body contains the gear assembly. The pump body includes a first glue inlet channel, a second glue inlet channel, and a glue outlet channel. One end of the first glue inlet channel extends to the edge of the pump body and forms a glue inlet. The other end of the first glue inlet channel connects to the glue inlet cavity. One end of the second glue inlet channel connects to the first glue inlet channel, and the other end connects to the glue inlet cavity. The first and second glue inlet channels are located on different sides of the glue inlet cavity. One end of the glue outlet channel connects to the glue inlet cavity, and the other end extends to the edge of the pump body and forms a glue outlet.

2. The high-viscosity adhesive internal gear pump according to claim 1, characterized in that, The first glue inlet channel and the second glue inlet channel are respectively connected to the opposite sides of the glue inlet cavity along the axial direction of the gear assembly.

3. The high-viscosity adhesive internal gear pump according to claim 2, characterized in that, The glue inlet is located at the bottom of the pump body, the first glue inlet channel is connected to the lower part of the glue inlet chamber, the second glue inlet channel is connected to the upper part of the glue inlet chamber, and the rotation axis of the gear assembly extends vertically.

4. The high-viscosity adhesive internal gear pump according to claim 1, characterized in that, The high-viscosity adhesive internal gear pump also includes a pump chamber cover plate assembly, the gear assembly being rotatably connected within the pump chamber cover plate assembly, and the pump chamber cover plate assembly including a first cover plate and a second cover plate arranged along the axial direction of the gear assembly; The first cover plate has a first glue inlet groove and a glue outlet groove. The first glue inlet groove connects the second glue inlet channel and the glue inlet cavity. The glue outlet groove connects the glue outlet channel and the glue outlet cavity. The second cover plate has a second glue inlet groove, which connects the first glue inlet channel and the glue inlet cavity.

5. The high-viscosity adhesive internal gear pump according to claim 4, characterized in that, The projection of the glue inlet cavity onto the projection plane is located inside the projection of the first glue inlet groove onto the projection plane, and the projection plane is perpendicular to the axis of the gear assembly; And / or, the projection of the glue inlet cavity onto the projection plane is located inside the projection of the second glue inlet groove onto the projection plane, and the projection plane is perpendicular to the axis of the gear assembly.

6. The high-viscosity adhesive internal gear pump according to claim 4, characterized in that, The projection of the gear assembly onto the projection plane is located inside the projection of the inlet onto the projection plane, and the projection plane is perpendicular to the axial direction of the gear assembly; And / or, the projection of the inlet onto the projection plane is located inside the projection of the pump chamber cover assembly onto the projection plane, and the projection plane is perpendicular to the axial direction of the gear assembly.

7. The high-viscosity adhesive internal gear pump according to any one of claims 1 to 6, characterized in that, Along the direction extending from the first glue inlet channel toward the glue inlet cavity, the opening of the first glue inlet channel gradually decreases.

8. The high-viscosity adhesive internal gear pump according to any one of claims 1 to 6, characterized in that, The first glue inlet channel includes a first channel segment and a second channel segment. One end of the first channel segment forms the glue inlet, and the other end of the first channel segment is connected to the second channel segment. The end of the second channel segment facing away from the first channel segment is connected to the glue inlet cavity. Along the direction of the first channel segment toward the glue inlet cavity, the opening of the first channel segment gradually decreases. One end of the second glue inlet channel forms a connecting port, and the connecting port is connected to the first glue inlet channel. The connecting port is connected to the side of the first channel segment and the second channel segment.

9. The high-viscosity adhesive internal gear pump according to claim 8, characterized in that, The first channel segment includes a guide portion and an adhesive inlet portion, the guide portion and the adhesive inlet portion being distributed along the arrangement direction of the first channel segment and the communication port, and one end of the second adhesive inlet channel extending to the adhesive inlet portion; The inner wall of the guide portion is inclined toward the center of the first glue inlet channel along the direction from the glue inlet to the glue inlet cavity; the glue inlet portion is recessed relative to the guide portion, and the end of the glue inlet portion facing away from the glue inlet is connected to the second channel segment.

10. The high-viscosity adhesive internal gear pump according to claim 9, characterized in that, The projection of the second channel segment onto the projection plane is located inside the projection of the glue inlet onto the projection plane, and the projection plane is perpendicular to the axial direction of the gear assembly; And / or, along the direction from the first channel segment toward the second channel segment, the opening of the second channel segment first gradually decreases and then gradually increases.

11. The high-viscosity adhesive internal gear pump according to claim 1, characterized in that, The high-viscosity adhesive internal gear pump also includes a heating component, which is located on the periphery of the dispensing channel and is used to heat the high-viscosity adhesive in the dispensing channel.

12. An adhesive supply system, characterized in that, include: High-viscosity adhesive internal gear pump according to any one of claims 1 to 11; A material cylinder is used to store high-viscosity adhesive, and an internal gear pump for the high-viscosity adhesive is placed inside the material cylinder, with the adhesive inlet located at the bottom of the pump body; A drive assembly is connected to the high-viscosity adhesive internal gear pump and drives the high-viscosity adhesive internal gear pump to rise and fall, so that the inlet rises and falls with the liquid level change of the high-viscosity adhesive and contacts the high-viscosity adhesive.

Images