Non-contact spray head cleaning device

Abstract

The invention discloses a non-contact type nozzle cleaning device which comprises a pressure tank, a cleaning device, a cleaning device and a cleaning device. The pressure tank is provided with an air inlet, an air outlet, a water inlet and a water outlet. The spray head cleaning assembly comprises a cleaning liquid storage tank, a spray head washing pipe and a spray head air blowing pipe, the spray head washing pipe and the spray head air blowing pipe are arranged in the cleaning liquid storage tank, the spray head washing pipe is provided with a plurality of water spraying openings, the spray head washing pipe is communicated with the water outlet, and the spray head air blowing pipe is provided with a plurality of air spraying holes; when the spray head is used for cleaning, high-pressure air is introduced into the pressure tank to enable the water spraying opening to spray cleaning liquid to the spray head, and high-pressure air is introduced into the spray head blowing pipe to enable the air spraying hole to spray air to the spray head. When the nozzle is cleaned, the nozzle does not make direct contact with the nozzle, the risk that the nozzle is damaged is greatly reduced, nozzle cleaning comprises the water washing step and the blow washing step, the nozzle in the groove can be cleaned through water washing and blow washing, the nozzle is thoroughly cleaned, and the risk caused by incomplete cleaning to the nozzle is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a non-contact nozzle cleaning device. Background Art

[0002] like Figure 1 As shown, a common existing nozzle cleaning mechanism is shown, which is composed of a water storage tank assembly 1, a scraper assembly 2 and a power assembly 3.

[0003] The working process of the nozzle cleaning mechanism is as follows: the nozzle moves to the cleaning position, the power assembly 3 drives the scraper assembly 2 to rotate downward 90°, so that the cleaning liquid inside the water storage tank assembly 1 cleans the scraper inside the scraper assembly 2, and then the scraper assembly 2 is driven by the power assembly 3 to rotate upward 90° to scrape the nozzle surface, thereby removing stains on the nozzle surface. The scraper assembly 2 is made of non-metallic flexible material.

[0004] The above nozzle cleaning mechanism has the following disadvantages:

[0005] (1) There is a risk of damaging the nozzle due to direct contact between the nozzle and the scraper assembly 2 during the cleaning process;

[0006] (2) After repeated use, the cleaning liquid in the water storage tank assembly 1 contains impurities, which may damage the nozzle;

[0007] (3) Based on the nozzle structure, the nozzle is located inside the groove, and the scraper cannot fully clean the groove, resulting in the risk of incomplete cleaning. Summary of the invention

[0008] In view of the above-mentioned shortcomings, the technical problem to be solved by the present invention is to provide a non-contact nozzle cleaning device, which does not contact the nozzle when cleaning the nozzle, thereby effectively protecting the nozzle.

[0009] In order to solve the above technical problems, the technical solution of the present invention is:

[0010] A non-contact nozzle cleaning device, comprising:

[0011] A pressure tank, wherein the pressure tank is provided with an air inlet, an air outlet, a water inlet and a water outlet;

[0012] A nozzle cleaning assembly, the nozzle cleaning assembly comprising a cleaning liquid storage tank, a nozzle flushing pipe and a nozzle air blowing pipe, the nozzle flushing pipe and the nozzle air blowing pipe are respectively arranged in the cleaning liquid storage tank, the nozzle flushing pipe is provided with a plurality of water spraying ports, the nozzle flushing pipe is connected to the water outlet, and the nozzle air blowing pipe is provided with a plurality of air jet holes;

[0013] When cleaning the nozzle, high-pressure air is passed into the pressure tank to make the water spray port spray cleaning liquid toward the nozzle, and high-pressure air is passed into the nozzle air pipe to make the air jet hole spray air toward the nozzle.

[0014] Preferably, the nozzle flushing pipe is U-shaped, and the nozzle air blowing pipe is U-shaped; the nozzle flushing pipe includes two flushing pipe bodies and a flushing connection part connected between the two flushing pipe bodies, and the water spray port is arranged on the flushing pipe body; the nozzle air blowing pipe includes two blowing pipe bodies and a blowing connection part connected between the two blowing pipe bodies, and the air jet hole is arranged on the blowing pipe body.

[0015] Preferably, the flushing tube bodies and the blowing tube bodies are arranged alternately.

[0016] Preferably, the positions of the nozzle flushing pipe and the nozzle air blowing pipe in the cleaning liquid storage tank are adjustable.

[0017] Preferably, mounting brackets are respectively provided at opposite ends of the cleaning liquid storage tank, and the nozzle flushing pipe and the nozzle air blowing pipe are respectively installed between the two mounting brackets;

[0018] The flushing connection part and the blowing connection part are respectively connected with horizontal ear plates, and the ear plates are provided with horizontal waist-shaped holes, and the bolts passing through the horizontal waist-shaped holes are connected with the mounting bracket;

[0019] The mounting bracket is provided with a vertical waist-shaped hole, and the bolt passing through the vertical waist-shaped hole is connected to the cleaning liquid storage tank.

[0020] Preferably, the nozzle flushing pipe and the nozzle air blowing pipe are fixedly connected.

[0021] Preferably, a liquid return pipe is provided between the cleaning liquid storage tank and the pressure tank, and the liquid return pipe is provided with a filtering device.

[0022] Preferably, the filtering device comprises a primary filtering device and a secondary filtering device.

[0023] Preferably, the cleaning liquid storage tank is provided with a cover plate.

[0024] Preferably, the cleaning liquid storage tank is provided with a cover plate sensor for detecting the presence or absence of the cover plate.

[0025] After adopting the above technical solution, the beneficial effects of the present invention are:

[0026] Compared with the prior art, the present application does not make direct contact with the nozzle when cleaning the nozzle, which greatly reduces the risk of nozzle damage. The nozzle cleaning includes two steps of water washing and blowing, and the water washing and blowing can clean the nozzle inside the groove. The nozzle is cleaned thoroughly, reducing the risk of incomplete cleaning to the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a nozzle cleaning device in the prior art;

[0028] Figure 2 1 is a schematic structural diagram of an embodiment of a non-contact nozzle cleaning device of the present invention;

[0029] Figure 3 yes Figure 2 A schematic diagram of the three-dimensional structure of the middle nozzle cleaning assembly without the cover plate;

[0030] Figure 4 yes Figure 2 A schematic diagram of the top view of the middle nozzle cleaning assembly without the cover plate;

[0031] Figure 5 yes Figure 2 A schematic diagram of the structure of the mounting bracket;

[0032] In the figure: 1. Water storage tank assembly; 2. Scraper assembly; 3. Power assembly; 4. Pressure tank; 5. Nozzle cleaning assembly; 51. Cleaning liquid storage tank; 52. Nozzle flushing pipe; 521. Water spray port; 522. Flushing pipe body; 523. Flushing connection; 53. Nozzle air blowing pipe; 531. Air jet hole; 532. Air blowing pipe body; 533. Air blowing connection; 54. Mounting bracket; 541. Vertical waist-shaped hole; 55. Ear plate; 551. Horizontal waist-shaped hole; 56. Cover plate with or without sensor; 57. Cover plate; 571. Handle; 6. Filter device; 7. Air path assembly; 8. Liquid return pipe. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] like Figure 2-Figure 4 As shown in the figure, a non-contact nozzle cleaning device comprises:

[0035] A pressure tank 4, wherein the pressure tank 4 is provided with an air inlet, an air outlet, a water inlet and a water outlet;

[0036] The nozzle cleaning assembly 5 includes a cleaning liquid storage tank 51, a nozzle flushing pipe 52 and a nozzle air blowing pipe 53. The nozzle flushing pipe 52 and the nozzle air blowing pipe 53 are respectively arranged in the cleaning liquid storage tank 51. The nozzle flushing pipe 52 is provided with a plurality of water spray ports 521. The nozzle flushing pipe 52 is connected to the water outlet. The nozzle air blowing pipe 53 is provided with a plurality of jet holes 531.

[0037] The working process and working principle of the non-contact nozzle cleaning device of the present invention are as follows:

[0038] (1) When the cleaning device is used to clean the nozzle for the first time, the air outlet is connected to a vacuum generator, and the water inlet is connected to a container containing cleaning liquid. The vacuum generator works to generate a vacuum in the pressure tank 4, and the pressure tank 4 is in a negative pressure state, so that the cleaning liquid in the container is injected into the pressure tank 4;

[0039] (2) The air inlet is connected to an external high-pressure air source, and high-pressure air is injected into the pressure tank 4. The pressure in the pressure tank 4 increases, so that the cleaning liquid in the pressure tank 4 is quickly injected into the nozzle flushing pipe 52, and the cleaning liquid is sprayed out from the water spray port 521 to flush the nozzle of the printer. After the nozzle is rinsed clean, stop injecting high-pressure air into the pressure tank 4;

[0040] (3) The nozzle air blowing pipe 53 is connected to an external high-pressure air source. High-pressure air is quickly injected into the nozzle air blowing pipe 53. The air jet hole 531 ejects a high-speed airflow toward the nozzle to blow away the impurities remaining on the nozzle and dry the nozzle, further enhancing the cleaning effect.

[0041] Compared with the prior art, the present application does not make direct contact with the nozzle when cleaning the nozzle, which greatly reduces the risk of nozzle damage. The nozzle cleaning includes two steps of water washing and blowing, and the water washing and blowing can clean the nozzle inside the groove. The nozzle is cleaned thoroughly, reducing the risk of incomplete cleaning to the nozzle.

[0042] To facilitate cleaning of two rows of nozzles, in the illustrated embodiment, the nozzle flushing pipe 52 and the nozzle air blowing pipe 53 are U-shaped respectively; the nozzle flushing pipe 52 includes two flushing pipe bodies 522 and a flushing connection part 523 connected between the two flushing pipe bodies 522, a water spray port 521 is provided on the flushing pipe body 522, and the flushing connection part 523 is connected to the water outlet; the nozzle air blowing pipe 53 includes two air blowing pipe bodies 532 and an air blowing connection part 533 connected between the two air blowing pipe bodies 532, an air jet hole 531 is provided on the air blowing pipe body 532, and the air blowing connection part 533 is externally connected to a high-pressure air source. When cleaning the nozzles, the two flushing pipe bodies 522 flush the two rows of nozzles at the same time, and then the two air blowing pipe bodies 532 blow air to the two rows of nozzles at the same time.

[0043] In this embodiment, the flushing tube body 522 and the blowing tube body 532 are arranged in parallel and alternately, occupying a small space and facilitating the arrangement of components.

[0044] If the nozzles of two rows of printers are staggered, the water spray outlets 521 on the two flushing tube bodies 522 are staggered, and the air jet holes 531 on the two blowing tube bodies 532 are staggered. The water spray outlets 521 on the flushing tube body 522 and the air jet holes 531 on the blowing tube body 532 for cleaning the same row of nozzles are relatively arranged. After flushing, the nozzles can be directly moved horizontally for blowing, thereby improving cleaning efficiency.

[0045] In order to facilitate the distance between the nozzle flushing pipe 52 and the nozzle air blowing pipe 53 and the nozzle and to facilitate assembly, the positions of the nozzle flushing pipe 52 and the nozzle air blowing pipe 53 in the cleaning liquid storage tank 51 are adjustable.

[0046] like Figure 5 As shown, specifically, mounting brackets 54 are respectively provided at opposite ends of the cleaning liquid storage tank 51, and the nozzle flushing pipe 52 and the nozzle blowing pipe 53 are respectively installed between the two mounting brackets 54;

[0047] The flushing connection part 523 and the blowing connection part 533 are respectively connected with a horizontal ear plate 55, and a horizontal waist-shaped hole 551 is provided on the ear plate 55. The bolts passing through the horizontal waist-shaped hole 551 are connected with the mounting bracket 54. The horizontal positions of the nozzle flushing pipe 52 and the nozzle blowing pipe 53 can be adjusted by loosening the bolts, and then the bolts are tightened to lock the horizontal positions of the nozzle flushing pipe 52 and the nozzle blowing pipe 53 to avoid assembly interference and meet the cleaning requirements of different nozzles.

[0048] The mounting bracket 54 is provided with a vertical waist-shaped hole 541, and the bolt passing through the vertical waist-shaped hole 541 is connected to the cleaning liquid storage tank 51. The bolts are loosened to adjust the vertical positions of the two mounting brackets 54, thereby adjusting the distances between the nozzle flushing pipe 52 and the nozzle air blowing pipe 53 and the nozzle to meet the cleaning requirements of different nozzles.

[0049] Furthermore, the nozzle flushing pipe 52 and the nozzle air blowing pipe 53 are fixedly connected, and their positions can be adjusted simultaneously, and the position adjustment efficiency is high.

[0050] The cleaning liquid sprayed from the nozzle flushing pipe 52 is stored in the cleaning liquid storage tank 51. In order to improve the utilization rate of the cleaning liquid and reduce the cost, a return pipe 8 is provided between the cleaning liquid storage tank 51 and the pressure tank 4, and the return pipe 8 is provided with a filtering device 6. A cleaning liquid recovery and filtering step is added between step (2) and step (3): the pressure tank 4 is depressurized through the air outlet, and the air inlet is connected to the vacuum generator. The vacuum generator is used to generate negative pressure in the pressure tank 4, so that the cleaning liquid in the cleaning liquid storage tank 51 passes through the return pipe 8 and is filtered by the filtering device 6 and then flows back into the pressure tank 4, so that the cleaning liquid can be recycled. In addition, after the cleaning liquid is filtered, impurities are removed, and there are no impurities in the cleaning liquid, which prevents the impurities from rushing onto the nozzle, and can clean the nozzle more thoroughly.

[0051] Among them, after the cleaning liquid is injected into the pressure tank 4 in step (1), step (2), the cleaning liquid recovery and filtration step and step (3) form a process cycle, and then only this process cycle is run each time the nozzle is cleaned.

[0052] The filter device 6 includes a primary filter device and a secondary filter device. The cleaning liquid is first filtered by the primary filter device and then filtered by the secondary filter device. The impurities are completely removed by filtering twice. The primary filter device is a coarse filter device, which can be disassembled for cleaning and is easy to maintain. The secondary filter device is a precision filter device. The primary filter device and the secondary filter device can be directly purchased from the market, and their structures are not described in detail.

[0053] In order to prevent external impurities from entering the cleaning liquid storage tank 51, the cleaning liquid storage tank 51 is provided with a cover plate 57. When the nozzle needs to be cleaned, the cover plate 57 is opened; when the nozzle does not need to be cleaned, the cover plate 57 covers the cleaning liquid storage tank 51 to prevent external impurities from entering. Furthermore, a cover plate presence sensor 56 is provided on the cleaning liquid storage tank 51. When the cover plate 57 covers the cleaning liquid storage tank 51, the cover plate presence sensor 56 can detect the existence of the cover plate 57 and display a warning message on the display screen to avoid misoperation causing the nozzle to collide with the cover plate 57. Preferably, the cover plate presence sensor 56 is a pressure sensor, a photoelectric sensor, a proximity switch or a Hall sensor, etc.

[0054] In order to facilitate taking and placing the cover plate 57 , a handle 571 is provided on the cover plate 57 .

[0055] The non-contact nozzle cleaning device of the present invention further comprises an air circuit assembly 7, and the air circuit assembly 7 is provided with a plurality of control valves for enabling each process to run in an orderly manner.

[0056] The above are examples of the best implementation of the present invention, and the parts not described in detail are common knowledge of ordinary technicians in the field. The protection scope of the present invention shall be based on the content of the claims, and any equivalent transformation based on the technical enlightenment of the present invention is also within the protection scope of the present invention.

Claims

1. A non-contact nozzle cleaning device, characterized in that: include: A pressure tank, wherein the pressure tank is provided with an air inlet, an air outlet, a water inlet and a water outlet; A nozzle cleaning assembly, the nozzle cleaning assembly comprising a cleaning liquid storage tank, a nozzle flushing pipe and a nozzle air blowing pipe, the nozzle flushing pipe and the nozzle air blowing pipe are respectively arranged in the cleaning liquid storage tank, the nozzle flushing pipe is provided with a plurality of water spraying ports, the nozzle flushing pipe is connected to the water outlet, and the nozzle air blowing pipe is provided with a plurality of air jet holes; When cleaning the nozzle, high-pressure air is passed into the pressure tank to make the water spray port spray cleaning liquid toward the nozzle, and high-pressure air is passed into the nozzle air pipe to make the air jet hole spray air toward the nozzle.

2. The non-contact nozzle cleaning device according to claim 1, characterized in that: The nozzle flushing pipe is U-shaped, and the nozzle air blowing pipe is U-shaped; the nozzle flushing pipe includes two flushing pipe bodies and a flushing connection part connected between the two flushing pipe bodies, and the water spray port is arranged on the flushing pipe body; the nozzle air blowing pipe includes two air blowing pipe bodies and a air blowing connection part connected between the two air blowing pipe bodies, and the air jet hole is arranged on the air blowing pipe body.

3. The non-contact nozzle cleaning device according to claim 2, characterized in that: The flushing tube bodies and the blowing tube bodies are arranged alternately.

4. The non-contact nozzle cleaning device according to claim 3, characterized in that: The positions of the nozzle flushing pipe and the nozzle air blowing pipe in the cleaning liquid storage tank are adjustable.

5. The non-contact nozzle cleaning device according to claim 4, characterized in that: Mounting brackets are respectively provided at opposite ends of the cleaning liquid storage tank, and the nozzle flushing pipe and the nozzle air blowing pipe are respectively installed between the two mounting brackets; The flushing connection part and the blowing connection part are respectively connected with horizontal ear plates, and the ear plates are provided with horizontal waist-shaped holes, and the bolts passing through the horizontal waist-shaped holes are connected with the mounting bracket; The mounting bracket is provided with a vertical waist-shaped hole, and the bolt passing through the vertical waist-shaped hole is connected to the cleaning liquid storage tank.

6. The non-contact nozzle cleaning device according to claim 5, characterized in that: The nozzle flushing pipe and the nozzle air blowing pipe are fixedly connected.

7. The non-contact nozzle cleaning device according to claim 1, characterized in that: A liquid return pipe is provided between the cleaning liquid storage tank and the pressure tank, and the liquid return pipe is provided with a filtering device.

8. The non-contact nozzle cleaning device according to claim 7, characterized in that: The filtering device comprises a primary filtering device and a secondary filtering device.

9. The non-contact nozzle cleaning device according to claim 1, characterized in that: The cleaning liquid storage tank is provided with a cover plate.

10. The non-contact nozzle cleaning device according to claim 9, characterized in that: The cleaning liquid storage tank is provided with a cover plate presence sensor for detecting the cover plate.

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