Automatic glue circulating system for corrugating machine production line

Abstract

The utility model discloses an automatic glue circulating system for a corrugating machine production line, which comprises a glue supply part of a glue making machine, a pit machine glue supply part and a pasting machine glue supply part, the pit machine glue supply part and the pasting machine glue supply part are connected with the glue supply part of the glue making machine, and the three parts are respectively provided with a glue tank, a glue pump, a valve and pipelines connected with one another. And through switching of the glue pump and the valve and pipeline connection, production and use of a pasting machine and two pit machines on a corrugated machine production line can be met. According to the automatic glue circulating system for the corrugating machine production line, the purposes that supply of the gluing position of the whole corrugating machine production line can be controlled through one glue control point, glue is recycled in a centralized mode, glue is supplied between devices mutually, and the glue is automatically cleaned and decontaminated are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of a corrugating machine glue supply system, in particular to an automatic glue circulation system for a corrugating machine production line which integrates the functions of glue supply, automatic glue reflux and circulation, and automatic cleaning. Background Art

[0002] At present, when the corrugated machine production line is in production, it is necessary to supply and use glue to the pit machine and the gluing machine on the production line. When supplying and using glue on the pit machine and the gluing machine, the original operation method requires manual running back and forth between multiple glue points of the pit machine and the gluing machine in order to realize manual glue supply and glue replenishment, which is very time-consuming and labor-intensive. In addition, the traditional glue supply is to make glue through the glue making machine and then supply the glue to the glue use point. Since the glue is not supplied directly, the glue production amount of the glue machine will not match the glue production amount used in the corrugated machine production line, which will cause the corrugated machine production line to be at risk of lack of glue during online production. In severe cases, it will lead to shutdown and suspension of production.

[0003] In Chinese patent literature, there are also some prior patents on the use of glue in corrugated machines, such as "A spare environmentally friendly glue circulation device for corrugated machines" with patent number 202020876618.5, "Improvement of efficient utilization of glue in corrugated machines" with patent number 202221359460.X, and "A glue storage barrel for corrugated machines" with patent number 202020248203.3. The above-mentioned patent documents respectively achieve the purpose of recycling and reusing glue, the purpose of efficient glue coating and reducing waste, and the purpose of storing glue and improving glue quality. Although the technical solutions in these patent documents can achieve the effects of automatic glue supply and glue application, there are still some problems in actual use, as follows: (1) Each gluing point of the corrugator uses an independent gluing machine for glue control and recycling. When glue is insufficient, the independent gluing machine still needs to be manually replenished, which fails to achieve automatic glue replenishment and reduce the risk of glue shortage to production; in addition, glue recycling can only be recycled to its own gluing machine, and other gluing machines on the production line cannot replenish glue with each other. In this way, when glue replenishment is not timely, glue cannot be transported between gluing machines, and the impact of untimely glue replenishment on production cannot be effectively eliminated. (2) After a period of use, the glue system applied to the gluing position of the corrugator needs to clean the containers such as the glue tank to prevent the glue layer from becoming thicker and thicker and the solidified glue layer from falling into the glue to reduce the glue quality. However, there is no equipment or technical solution for automatic cleaning and decontamination of the glue tank in the existing technology and patent documents, which fails to achieve the purpose of automatic cleaning and decontamination of glue and effective cleaning. (3) When the glue is collected and recycled into the glue tank for recycling, it is inevitable that there will be certain impurities and solidified glue blocks. However, in the prior art and related patent literature, there is no certain filtering process or equipment for the recycled glue when the glue is recycled. Therefore, the quality of the recycled glue will be reduced, affecting the quality of the subsequent glue recycling.

[0004] Therefore, there are still many problems with the glue application system and equipment required for the corrugating machine production line of traditional technology, which need further improvement or modification. Summary of the invention

[0005] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and to provide an automatic glue circulation system for a corrugating machine production line. The automatic glue circulation system for the corrugating machine production line adopts a glue room (with a large glue barrel inside) whose glue capacity is twice the glue production capacity of a traditional glue making machine to provide glue, and then the glue is concentrated in the glue room and controlled to be transported to the pit machine and the pasting machine on the corrugating machine production line for use, which can meet the glue consumption of the gluing parts of the pit machine and the pasting machine for 12 hours and at the same time can realize the mutual supply and glue circulation between the pit machine and the pasting machine at any time, realizing the centralized supply in the glue room and the supply and distribution of glue on the corrugating machine production line can be completed at one operation point in the glue room. In addition, the glue automatic circulation system used in the corrugated machine production line has achieved the technical effects of 8 modes of glue supply and use and flow circulation mode, such as glue transmission between any two glue storage or use points, centralized recovery and mutual transportation and recycling of residual glue, and automatic cleaning and sewage discharge functions achieved by direct tap water to three glue tanks. It also achieved relatively centralized valve installation, and the switching operation of glue supply, recovery and cleaning is very convenient. The overall glue automatic circulation system achieves the purpose of controlling the supply of glue coating positions of the entire corrugated machine production line with one glue control point, centralized recovery and recycling of glue, mutual supply of glue between equipment, and automatic cleaning and decontamination of glue.

[0006] The utility model solves the technical problem by adopting a technical solution: an automatic glue circulation system for a corrugated machine production line, comprising a glue supply part of a glue making machine, a glue supply part of a pit machine interconnected with the glue supply part of the glue making machine, and a glue supply part of a pasting machine.

[0007] The glue supply part of the glue making machine includes a glue tank connected to the glue room, a glue pump connected to the bottom of the glue tank, and a glue valve assembly connected to the glue pump and supplying glue to the pit machine glue supply part and the paste machine glue supply part respectively.

[0008] The pit machine glue supply part includes a pit machine glue tank connected to the glue making machine valve assembly, a pit machine glue pool connected to the bottom of the pit machine glue tank, a pit machine glue pump connected to the pit machine glue pool, a pit machine three-way valve connected to the pit machine glue pump and installed to supply glue to the pit machine gluing position, a pit machine glue tray located below the pit machine gluing position and collecting recycled glue, and a pit machine glue recovery pipeline arranged between the glue tray and the pit machine glue pool.

[0009] The glue supply part of the glue machine comprises a glue tank of the glue machine connected to the valve assembly of the glue making machine, a glue pool of the glue machine connected to the bottom of the glue tank of the glue machine, a glue pump of the glue machine connected to the glue pool of the glue machine, a first three-way valve of the glue machine connected to the glue pump of the glue machine and supplying glue to the gluing position of the glue machine, a glue tray of the glue machine located below the gluing position of the glue machine and collecting and recycling glue, and a glue recovery pipeline of the glue machine arranged between the glue tray of the glue machine and the glue pool of the glue machine.

[0010] Furthermore, the first pasting machine three-way valve is also connected to the second pasting machine three-way valve, and the second pasting machine three-way valve is directly connected to the pit machine glue tank; the second pasting machine three-way valve is also connected to the pit machine check valve, and the pit machine check valve is respectively connected to the glue tank of the glue making machine and the pit machine three-way valve.

[0011] Furthermore, the glue making machine valve assembly includes a glue making machine check valve connected to the glue making machine glue pump, a glue making machine three-way valve connected to the glue making machine check valve, a pit machine solenoid valve and a paste machine battery valve, both of which are connected to the glue making machine three-way valve and are respectively connected to the pit machine glue tank and the paste machine glue tank.

[0012] Furthermore, the tops of the glue tank of the glue making machine, the glue tank of the pit machine and the glue tank of the paste machine are all connected to a tap water pipeline, and the three-way valve of the glue making machine is also connected to a sewage tank.

[0013] Furthermore, the pit machine glue pump is also connected to a pit machine filter placed in the pit machine glue pool; the paste machine glue pump is also connected to a paste machine filter placed in the paste machine glue pool; the bottom of the glue machine glue tank is also connected to a glue machine filter.

[0014] Furthermore, the pit machine glue tray is provided with two and is respectively located below the pit machine gluing position of the pit machine, the pit machine three-way valves are connected to the two pit machine glue trays, and the two pit machine glue trays are provided with their own pit machine glue recovery pipelines connected to the pit machine glue pool.

[0015] Furthermore, the capacity of the glue tank of the glue making machine is 800kg, the capacity of the glue tank of the pit machine is 1000kg, and the capacity of the glue tank of the pasting machine is 1500kg.

[0016] In summary, the automatic glue circulation system for the corrugated machine production line of the utility model adopts a glue room (with a large glue barrel inside) with a glue capacity twice the glue production capacity of the traditional glue making machine to provide glue, and then the glue is concentrated in the glue room to control the delivery to the pit machine and the paste machine on the corrugated machine production line for use, which can meet the glue consumption of the gluing parts of the pit machine and the paste machine for 12 hours and can realize the mutual supply and recycling of glue between the pit machine and the paste machine at any time, realizing the centralized supply in the glue room and the glue room. The glue supply and distribution operation on the corrugated machine production line can be completed by performing one operation point. In addition, the automatic glue circulation system for the corrugated machine production line realizes the technical effects of 8 modes of glue supply and use and flow circulation mode, such as the transmission of glue between any two glue storage or use points, the centralized recovery and mutual delivery and recycling of the remaining glue, and the direct access of tap water to the three glue tanks to realize the automatic cleaning and sewage discharge function, and also realizes the relatively centralized installation of valves, and the switching operation of glue supply, recovery and cleaning is very convenient. The overall automatic glue circulation system realizes the purpose of controlling the supply of glue coating positions of the entire corrugating machine production line with one glue control point, as well as centralized recycling and reuse of glue, mutual supply of glue between equipment and automatic cleaning and decontamination of glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of an automatic glue circulation system for a corrugated machine production line according to Embodiment 1 of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the glue supply part of the glue making machine;

[0019] Figure 3 This is a schematic diagram of the structure of the glue supply part of the pit machine;

[0020] Figure 4 This is a schematic diagram of the structure of the glue supply part of the glue machine;

[0021] Figure 5 This is a schematic structural diagram of the first flow mode of an automatic glue circulation system for a corrugated machine production line according to Embodiment 1 of the present utility model;

[0022] Figure 6 This is a schematic structural diagram of the second flow mode of an automatic glue circulation system for a corrugating machine production line according to Embodiment 1 of the present utility model;

[0023] Figure 7 This is a schematic structural diagram of the third flow mode of an automatic glue circulation system for a corrugating machine production line according to Embodiment 1 of the present utility model;

[0024] Figure 8This is a schematic structural diagram of the fourth flow mode of an automatic glue circulation system for a corrugating machine production line according to Embodiment 1 of the present utility model;

[0025] Fig. 9 This is a schematic structural diagram of the fifth flow mode of an automatic glue circulation system for a corrugating machine production line according to Embodiment 1 of the present utility model;

[0026] Fig.10 This is a schematic structural diagram of the sixth flow mode of an automatic glue circulation system for a corrugating machine production line according to Embodiment 1 of the present utility model;

[0027] Fig.11 This is a schematic structural diagram of the seventh flow mode of an automatic glue circulation system for a corrugating machine production line according to Embodiment 1 of the present utility model;

[0028] Fig.12 This is a schematic structural diagram of the (8th) flow mode of an automatic glue circulation system for a corrugating machine production line according to Embodiment 1 of the present utility model;

[0029] The markings in the attached drawings are as follows: 1. Glue supply section of glue making machine; 2. Glue supply section of pit machine; 3. Glue supply section of pasting machine; 4. Glue tank of glue making machine; 5. Glue pump of glue making machine; 7. Glue tank of pit machine; 8. Glue tank of pit machine; 9. Glue pump of pit machine; 10. Three-way valve of pit machine; 11. Glue tray of pit machine; 12. Glue recovery pipeline of pit machine; 13. Glue tank of pasting machine; 14. Glue tank of pasting machine; 15. Glue pump of pasting machine; 16. Three-way valve of the first pasting machine; 17. Glue tray of the pasting machine; 18. Glue recovery pipeline of the pasting machine; 19. Three-way valve of the second pasting machine; 20. Check valve of the pit machine; 21. Check valve of the glue making machine; 22. Three-way valve of the glue making machine; 23. Solenoid valve of the pit machine; 24. Battery valve of the pasting machine; 25. Tap water pipeline; 26. Sewage tank; 27. Filter of the pit machine; 28. Filter of the pasting machine; 29. ​​Filter of the glue making machine. DETAILED DESCRIPTION

[0030] Example 1

[0031] The automatic glue circulation system for a corrugated machine production line described in this embodiment 1 is as follows: Figure 1 As shown, it includes a glue supply part 1 of a glue making machine, a glue supply part 2 of a pit machine connected to the glue supply part of the glue making machine, and a glue supply part 3 of a pasting machine. The glue supply part of the glue making machine is responsible for making glue and conveying it to the glue supply part of the pit machine and the glue supply part of the pasting machine respectively.

[0032] like Figure 2As shown, the glue supply part of the glue making machine includes a glue tank 4 connected to the glue room, a glue pump 5 connected to the bottom of the glue tank, and a glue valve assembly connected to the glue pump and supplying glue to the glue supply part of the pit machine and the glue supply part of the paste machine. A sufficiently large glue bucket (more than twice the glue production capacity of the glue tank of the glue making machine) is provided in the glue room, and the glue room supplies glue to the glue tank of the glue making machine, and then the glue tank of the glue making machine pumps the glue to the glue supply part of the pit machine and the glue supply part of the paste machine through the opening of the glue pump and the glue valve assembly of the glue making machine, so as to achieve the purpose of transporting the glue making machine to the pit machine and the paste machine.

[0033] like Figure 3 As shown, the pit machine glue supply part includes a pit machine glue tank 7 connected to the glue making machine valve assembly, a pit machine glue pool 8 connected and installed to the bottom of the pit machine glue tank, a pit machine glue pump 9 connected to the pit machine glue pool, a pit machine three-way valve 10 connected and installed to the pit machine glue pump and supplying glue to the pit machine gluing position, a pit machine glue tray 11 located below the pit machine gluing position and collecting recycled glue, and a pit machine glue recovery pipeline 12 arranged between the glue tray and the pit machine glue pool. The glue tank of the glue making machine transports glue to the glue tank of the pit machine, and then the glue tank of the pit machine flows the glue into the glue pool of the pit machine. The pit machine glue pump pumps out the glue in the pit machine glue pool and transports the glue to the gluing position of the pit machine through the opening of the pit machine three-way valve to carry out the gluing work of the pit machine. After gluing at the pit machine gluing position, excess glue will fall into the pit machine glue tray below for collection, and then the glue in the pit machine glue tray will be circulated back to the pit machine glue pool through the pit machine glue recovery pipeline to achieve recycling again, ensuring the smooth use of the pit machine's glue and no waste of glue.

[0034] like Figure 4 As shown, the glue supply part of the glue machine is connected to the glue making machine valve assembly, the glue tank 13 of the glue machine, the glue pool 14 of the glue machine is connected to the bottom of the glue tank of the glue machine, the glue pump 15 of the glue machine is connected to the glue pool of the glue machine, the first three-way valve 16 of the glue machine is connected to the glue pump of the glue machine and supplies glue to the glue coating position of the glue machine, the glue tray 17 of the glue machine is located below the glue coating position of the glue machine and collects and recycles the glue, and the glue recovery pipeline 18 of the glue machine is arranged between the glue tray of the glue machine and the glue pool of the glue machine. The glue tank of the glue making machine conveys glue to the glue tank of the pasting machine, and then the glue tank of the pasting machine flows the glue into the glue pool of the pasting machine. The glue pump of the pasting machine pumps out the glue in the glue pool of the pasting machine and conveys the glue to the gluing position of the pasting machine through the opening of the first pasting machine three-way valve to carry out the gluing work of the pasting machine. After gluing at the gluing position of the pasting machine, excess glue will fall into the glue tray of the pasting machine below for collection, and then the glue in the glue tray of the pasting machine will be circulated back to the glue pool of the pasting machine through the glue recovery pipeline of the pasting machine to realize recycling again, thereby ensuring the smooth use of the glue of the pasting machine and no waste of glue.

[0035] In the present embodiment 1, the first pasting machine three-way valve is also connected to the second pasting machine three-way valve 19, and the second pasting machine three-way valve is directly connected to the pit machine glue tank; the second pasting machine three-way valve is also connected to the pit machine check valve 20, and the pit machine check valve is respectively connected to the glue tank of the glue making machine and the pit machine three-way valve. By setting the second pasting machine three-way valve, the connection between the pasting machine glue tank and the pit machine glue tank can be achieved, so that the purpose of the pit machine glue tank supplying glue to the pasting machine glue tank (the pasting machine glue usage is greater than the pit machine) can be achieved, and the purpose of the pit machine glue tank also providing glue when the pasting machine glue tank is short of glue.

[0036] In this embodiment 1, the glue making machine valve assembly includes a glue making machine check valve 21 connected to the glue making machine glue pump, a glue making machine three-way valve 22 connected to the glue making machine check valve, a pit machine solenoid valve 23 and a paste machine battery valve 24, both connected to the glue making machine three-way valve and connected to the pit machine glue tank and the paste machine glue tank respectively. Through the control of the glue making machine check valve and the glue making machine three-way valve, glue can be increased into the pit machine glue tank and the paste machine glue tank, and the pit machine solenoid valve and the paste machine battery valve control the glue input action of the pit machine glue tank and the paste machine glue tank.

[0037] In this embodiment 1, the tops of the glue tanks of the glue making machine, the glue tanks of the pit machine and the glue tanks of the paste machine are all connected to a tap water pipeline 25, and the three-way valve of the glue making machine is also connected to a sewage pool 26. The three glue tanks are all connected to the tap water pipeline and tap water is passed into the corresponding glue tanks. After cleaning the respective glue tanks, the sewage is finally discharged from the sewage pool, thereby realizing the cleaning of each glue tank and the automatic discharge of sewage.

[0038] In the present embodiment 1, the pit machine glue pump is also connected to a pit machine filter 27 placed in the pit machine glue pool; the paste machine glue pump is also connected to a paste machine filter 28 placed in the paste machine glue pool; the glue machine filter 29 is also connected to the bottom of the glue tank of the glue making machine. Since each glue tank stores glue and when the glue drops, the wall of the glue tank will inevitably have glue solidified to form a film layer. These film layers will separate or merge into the new glue after the new glue is injected, which will cause the new glue to contain a certain amount of glue film solid matter, and there is also a risk of these glue film solid matter when recycling the glue; therefore, setting a corresponding filter can filter out these impurities, preventing the glue from being transported to the glue coating position to reduce the quality of the glue.

[0039] In this embodiment 1, the pit machine glue tray is provided with two and is respectively located below the pit machine gluing position of the pit machine, the pit machine three-way valve is connected to the two pit machine glue trays, and the two pit machine glue trays are provided with respective pit machine glue recovery pipelines connected to the pit machine glue pool. Since two pit machines need to be configured on the corrugated machine production line, it is necessary to have two pit machine gluing positions in the pit machine glue supply part, and two pit machine glue trays are correspondingly provided for recycling glue.

[0040] In this embodiment 1, the capacity of the glue tank of the glue making machine is 800kg, the capacity of the glue tank of the pit machine is 1000kg, and the capacity of the glue tank of the paste machine is 1500kg. In the use of glue, the glue machine uses a large amount of glue, and the capacity of the glue tank of the paste machine is also the largest, while the glue tank of the glue making machine is used as a glue tank for temporary storage and guiding glue to the glue tank of the pit machine and the glue tank of the paste machine (the glue in the glue room is the original storage barrel), so the capacity of the glue tank of the glue making machine is relatively small.

[0041] The automatic glue circulation system used in the corrugated machine production line can realize 8 flow circulation modes, as follows:

[0042] (1) The glue tank of the glue making machine supplies glue to the glue tank of the pasting machine and the glue tank of the pit machine: glue tank of the glue making machine - filter of the glue making machine - glue pump of the glue making machine - check valve of the glue making machine - three-way valve of the glue making machine - solenoid valve of the pit machine and battery valve of the pasting machine - glue tank of the pit machine and glue tank of the pasting machine; Figure 5 (2) Glue internal circulation in the glue supply section of the glue machine: glue tank of the glue machine - glue pool of the glue machine - glue filter of the glue machine - glue pump of the glue machine - three-way valve of the first glue machine - glue tray of the glue machine - glue pool of the glue machine; Figure 6 shown.

[0043] (3) Glue internal circulation of the pit machine glue supply department: pit machine glue tank - pit machine glue pool - pit machine filter - pit machine glue pump - pit machine three-way valve - pit machine glue tray - pit machine glue pool; Figure 7 shown.

[0044] (4) The glue tank of the pasting machine supplies glue to the glue tank of the pit machine: the glue tank of the pasting machine - the glue pool of the pasting machine - the filter of the pasting machine - the glue pump of the pasting machine - the three-way valve of the first pasting machine - the three-way valve of the second pasting machine - the glue tank of the pit machine; Figure 8 shown.

[0045] (5) Return glue from the glue tank of the pasting machine to the glue tank of the glue making machine: glue tank of the pasting machine - glue pool of the pasting machine - filter of the pasting machine - glue pump of the pasting machine - three-way valve of the first pasting machine - three-way valve of the second pasting machine - check valve of the pit machine - glue tank of the glue making machine; Fig. 9 shown.

[0046] (6) The glue tank of the pit machine returns to the glue tank of the glue making machine: pit machine glue tank - pit machine glue pool - pit machine filter - pit machine glue pump - pit machine three-way valve - glue tank of the glue making machine; Fig.10 shown.

[0047] (7) The glue tank of the pit machine supplies glue to the glue tank of the pasting machine: the glue tank of the pit machine - the glue pool of the pit machine - the filter of the pit machine - the glue pump of the pit machine - the three-way valve of the pit machine - the glue tank of the glue making machine - the filter of the glue making machine - the glue pump of the glue making machine - the check valve of the glue making machine - the three-way valve of the glue making machine - the solenoid valve of the pasting machine - the glue tank of the pasting machine; Fig.11 shown.

[0048] (8) Discharge of cleaning wastewater: ① The tap water pipeline is passed into the glue tank of the pasting machine, and then the wastewater in the glue tank of the pasting machine is supplied to the glue tank of the glue making machine according to mode (5); ② The tap water pipeline is passed into the glue tank of the pit machine, and then the wastewater in the pit machine glue tank is supplied to the glue tank of the glue making machine according to mode (6); ③ The tap water pipeline is passed directly into the glue tank of the glue making machine, and then the wastewater supplied by ① and ② is combined and passed through the glue tank of the glue making machine - the filter of the glue making machine - the glue pump of the glue making machine - the check valve of the glue making machine - the three-way valve of the glue making machine - the wastewater tank, in turn, to complete the automatic cleaning of each glue tank and the discharge of wastewater; Fig.12 shown.

[0049] The automatic glue circulation system for the corrugated machine production line uses a glue room (with a large glue barrel inside) with a glue capacity twice that of the traditional glue machine to provide glue, and then concentrates the glue in the glue room to control the delivery to the pit machine and paste machine on the corrugated machine production line. It can meet the glue consumption of the gluing parts of the pit machine and paste machine for 12 hours and can also realize the mutual supply and recycling of glue between the pit machine and paste machine at any time, realizing the centralized supply in the glue room and the operation point in the glue room to complete the supply and distribution of glue on the corrugated machine production line. In addition, the automatic glue circulation system for the corrugated machine production line realizes the technical effects of 8 modes of glue supply and flow circulation mode, such as the transmission of glue between any two glue storage or use points, the centralized recovery and mutual delivery and recycling of the remaining glue, and the direct access of tap water to the three glue tanks to realize the automatic cleaning and sewage discharge function. It also realizes the relatively centralized installation of valves, and the switching operation of glue supply, recovery and cleaning is very convenient. The overall automatic glue circulation system realizes the purpose of controlling the supply of glue coating positions of the entire corrugating machine production line with one glue control point, as well as centralized recycling and reuse of glue, mutual supply of glue between equipment and automatic cleaning and decontamination of glue.

[0050] The above is only a preferred embodiment of the utility model, and does not limit the structure of the utility model in any form. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model still falls within the scope of the technical solution of the utility model.

Claims

1. An automatic glue circulation system for a corrugated machine production line, characterized in that: It comprises a glue supply part (1) of a glue making machine, a glue supply part (2) of a pit machine connected to the glue supply part of the glue making machine, and a glue supply part (3) of a pasting machine; The glue supply part of the glue making machine comprises a glue tank (4) connected to the glue room, a glue pump (5) connected to the bottom of the glue tank, and a glue valve assembly connected to the glue pump and supplying glue to the glue supply part of the pit machine and the glue supply part of the paste machine respectively; The glue supply unit of the pit machine comprises a pit machine glue tank (7) connected to the glue making machine valve assembly, a pit machine glue pool (8) connected to the bottom of the pit machine glue tank, a pit machine glue pump (9) connected to the pit machine glue pool, a pit machine three-way valve (10) connected to the pit machine glue pump and supplying glue to the pit machine gluing position, a pit machine glue tray (11) located below the pit machine gluing position and collecting recycled glue, and a pit machine glue recovery pipeline (12) arranged between the glue tray and the pit machine glue pool; The glue supply part of the glue machine is connected to the glue making machine valve assembly, the glue tank (13) of the glue machine is connected to the bottom of the glue tank of the glue machine, the glue tank of the glue machine is connected to the glue tank of the glue machine, the glue pump (15) of the glue machine is connected to the glue tank of the glue machine, the first three-way valve (16) of the glue machine is connected to the glue pump of the glue machine and supplies glue to the glue coating position of the glue machine, the glue tray (17) of the glue machine is located below the glue coating position of the glue machine and collects and recycles the glue, and the glue recovery pipeline (18) of the glue machine is arranged between the glue tray of the glue machine and the glue tank of the glue machine.

2. The automatic glue circulation system for a corrugated machine production line according to claim 1 is characterized in that: The first glue machine three-way valve is also connected to the second glue machine three-way valve (19), and the second glue machine three-way valve is directly connected to the pit machine glue tank; the second glue machine three-way valve is also connected to the pit machine check valve (20), and the pit machine check valve is respectively connected to the glue machine glue tank and the pit machine three-way valve.

3. The automatic glue circulation system for a corrugated machine production line according to claim 2, characterized in that: The glue making machine valve assembly comprises a glue making machine check valve (21) connected to the glue making machine glue pump, a glue making machine three-way valve (22) connected to the glue making machine check valve, a pit machine solenoid valve (23) and a paste machine battery valve (24) both connected to the glue making machine three-way valve and connected to the pit machine glue tank and the paste machine glue tank respectively.

4. The automatic glue circulation system for a corrugated machine production line according to claim 3 is characterized in that: The tops of the glue tank of the glue making machine, the glue tank of the pit machine and the glue tank of the paste machine are all connected to a tap water pipeline (25), and the three-way valve of the glue making machine is also connected to a sewage pool (26).

5. The automatic glue circulation system for a corrugated machine production line according to claim 4 is characterized in that: The pit machine glue pump is also connected to a pit machine filter (27) placed in the pit machine glue pool; the paste machine glue pump is also connected to a paste machine filter (28) placed in the paste machine glue pool; the bottom of the glue machine glue tank is also connected to a glue machine filter (29).

6. The automatic glue circulation system for a corrugated machine production line according to claim 5, characterized in that: The pit machine glue trays are provided with two and are respectively located below the pit machine gluing position of the pit machine. The pit machine three-way valves are connected to the two pit machine glue trays. The two pit machine glue trays are provided with their own pit machine glue recovery pipelines connected to the pit machine glue pool.

7. The automatic glue circulation system for a corrugating machine production line according to claim 6, characterized in that: The capacity of the glue tank of the glue making machine is 800kg, the capacity of the glue tank of the pit machine is 1000kg, and the capacity of the glue tank of the pasting machine is 1500kg.

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