CN219544301U - Special ink supply equipment for UV (ultraviolet) ink - Google Patents

Abstract

The utility model discloses special ink supply equipment for UV (ultraviolet) ink, which comprises a pneumatic lifting frame, a PLC (programmable logic controller) control electric box, a PLC touch screen, a chassis fixing plate, a driving mechanism and a plunger pump, wherein the pneumatic lifting frame is fixedly connected to the chassis fixing plate, an oil drum sealing pressure plate is movably arranged on the chassis fixing plate, the PLC control electric box and the PLC touch screen are both connected to one side of the pneumatic lifting frame, the PLC control electric box is electrically connected with the PLC touch screen, the driving mechanism is connected to the top of the pneumatic lifting frame, one end of the plunger pump is connected with the driving mechanism, and the other end of the plunger pump is connected with the oil drum sealing pressure plate. According to the utility model, through changing the cavity internal structure design and the sealing design of the plunger pump, the characteristics of UV ink can not be changed when the UV ink is pumped, and the plunger pump is provided with the primary cavity, the secondary cavity and the tertiary cavity to tertiary promote the UV ink, so that the remote conveying requirement of the UV ink can be met.

Description

Special ink supply equipment for UV (ultraviolet) ink

Technical Field

The utility model relates to the technical field of UV ink conveying, in particular to special ink supply equipment for UV ink.

Background

At present, the common ink pump used for the centralized ink supply system at home and abroad is used for supplying common offset ink and is mainly divided into a pneumatic plunger pump and an electric gear pump.

The main stream centralized ink supply system pump is in a pneumatic plunger pump structure, namely, a pneumatic motor is used as power to drag the plunger pump to move, materials are sucked up from a pump cavity, and the materials are pushed out after being pressurized in multiple layers in the cavity. The structure is very suitable for absorbing fluid with very high viscosity, and is widely applied to the industries of offset printing ink, glue, paint, grease and the like.

However, UV ink is a relatively special ink, and because the characteristics of UV ink are easily given by external energy, such as ultraviolet light, temperature, pressure, static electricity, friction coefficient, and the like, the phenomena of coking or curing can occur. Therefore, the conventional ink pump applied to the offset ink can only perform oxidation reaction with air due to the characteristic of the offset ink, so that the conventional gear pump and plunger pump can be used for the offset ink, but cannot be used when the pump is applied to UV ink. Based on the above, the utility model provides an ink supply device special for UV ink.

Disclosure of Invention

The utility model aims to provide the special ink supply equipment for the UV ink, which can provide power for the remote transportation of the UV ink, and can meet the requirement of the UV ink pump by the structure of the ink pump, and meanwhile, the characteristics of the UV ink cannot be influenced or changed, so that the special ink supply equipment can be applied to the field of UV ink transportation, and can also be applied to a centralized ink supply system, thereby realizing the purposes of reducing the solid waste of the ink, improving the production efficiency and reducing the labor intensity of workers for printing enterprises.

The utility model can be realized by the following technical scheme:

the special ink supply device for the UV ink comprises a pneumatic lifting frame, a PLC control electric box, a PLC touch screen, a chassis fixing plate, a driving mechanism and a plunger pump, wherein the pneumatic lifting frame is fixedly connected to the chassis fixing plate, an oil drum sealing pressure plate is movably installed on the chassis fixing plate, the PLC control electric box and the PLC touch screen are connected to one side of the pneumatic lifting frame, the PLC control electric box is electrically connected with the PLC touch screen, the driving mechanism is connected to the top of the pneumatic lifting frame, one end of the plunger pump is connected with the driving mechanism, and the other end of the plunger pump is connected with the oil drum sealing pressure plate; the plunger pump comprises a pump body base, a first-stage cavity, a second-stage cavity, a third-stage cavity, a fourth-stage cavity, a first central shaft and a second central shaft, wherein the first-stage cavity, the second-stage cavity, the third-stage cavity and the fourth-stage cavity are sequentially connected, the first-stage cavity is arranged in the pump body base, the first central shaft is positioned in the first-stage cavity and the second-stage cavity, the second central shaft is positioned in the third-stage cavity and the fourth-stage cavity, a first check valve sealing structure is arranged in the first-stage cavity, a second check valve sealing structure is arranged in the second-stage cavity, and a third check valve sealing structure is arranged in the third-stage cavity.

Further, the pump body base is a concave confluence base, the pump body base is connected with the oil drum sealing pressure plate, the primary cavity is communicated with the pump body base, and one end of the first central shaft is movably connected with the first one-way valve sealing structure.

Further, the second check valve seal structure comprises a disc-shaped disc, a first metal seal ring and a first rubber seal ring, the disc-shaped disc is close to the primary cavity, the first rubber seal ring is close to the tertiary cavity, the first metal seal ring is located between the disc-shaped disc and the first rubber seal ring, the first metal seal ring is in matched connection with the disc-shaped disc, and the third check valve seal structure is a steel ball gravity seal structure.

Further, the steel ball gravity sealing structure is composed of steel balls, a steel structure cavity and a stainless steel supporting piece, wherein the steel structure cavity is connected with one end of the stainless steel supporting piece, the steel structure cavity is provided with a steel ball upper limit part, the stainless steel supporting piece is provided with a steel ball supporting part, and the steel balls are movably mounted on the steel ball supporting part.

Further, the first rubber seal is equipped with annular V groove up the position, the steel construction cavity with be equipped with copper car spare between the stainless steel support spare, copper car spare is equipped with V type guiding gutter up the position, be equipped with square opening on the stainless steel support spare, the other end of first center pin with the other end swing joint of stainless steel support spare, the one end of second center pin with the top swing joint of copper structure cavity.

Further, the driving mechanism is an air motor, and the other end of the second central shaft is movably connected with the central shaft of the air motor.

Further, the top of level four cavity is connected with throat seal assembly, be equipped with a plurality of sealing washer in the throat seal assembly, the sealing washer includes first steel sheet sealing rubber circle, second steel sheet sealing rubber circle and third steel sheet sealing rubber circle, a steel sheet sealing rubber circle, second steel sheet sealing rubber circle and third steel sheet sealing rubber circle comprise V type rubber circle and metal seat, the metal seat cover is established on the V type rubber circle, be equipped with copper center calibration piece between second steel sheet sealing rubber circle and the third steel sheet sealing rubber circle, copper center calibration piece includes first copper center calibration piece and second copper center calibration piece, be equipped with first sealing washer between first steel sheet sealing rubber circle and the second steel sheet sealing rubber circle, be equipped with the second sealing washer between first copper center calibration piece and the second copper center calibration piece.

Further, the outer side of the quaternary cavity is provided with a plurality of connecting pieces, the pneumatic motor is fixedly connected with the quaternary cavity through the connecting pieces, the outer side of the quaternary cavity is also provided with a pressure sensor, an emptying high-pressure valve and a temperature sensor, and the pressure sensor is connected with the emptying high-pressure valve.

Further, the ink supply device further comprises a pressure relief pipeline, one end of the pressure relief pipeline is communicated with the four-stage cavity, the other end of the pressure relief pipeline is connected with the oil drum sealing pressure plate, the pressure relief pipeline extends out of the oil drum sealing pressure plate, and a bypass valve is arranged on the pressure relief pipeline.

Further, the ink supply device further comprises two connecting columns and an air source proportional valve, one ends of the two connecting columns are connected with the pneumatic lifting frame, the other ends of the two connecting columns are connected with the oil drum sealing pressure plate, the two connecting columns are respectively located at two sides of the plunger pump, and the air source proportional valve is connected to the other side of the pneumatic lifting frame.

The special ink supply device for UV ink has the following beneficial effects:

1. at present, no special ink pump for UV ink is temporarily available in China, and through continuous research and development and repeated experiments by the inventor, the utility model discovers that the characteristics of the UV ink can not be changed when the UV ink is pumped by changing the cavity inner structure design and the sealing design of the plunger pump, and the plunger pump is provided with a primary cavity, a secondary cavity and a tertiary cavity to tertiary promote the UV ink, so that the remote conveying requirement of the UV ink can be met. The UV ink can be pumped out from the 55 gallon barrel-shaped UV ink to be conveyed to a designated position, and the UV ink can be used for centralized ink supply in printing industries such as commercial rotary printing, plate combining and fast printing, so that solid waste is reduced for the printing industry, the labor intensity is reduced, and the production efficiency is greatly improved.

2. According to the utility model, the pump body base is designed to be the concave confluence base, and the UV ink can be filled in the primary cavity by utilizing the concave confluence fluid principle when the first central shaft reciprocates. And the movable clearance of the sealing structure of the first one-way valve is larger, so that the temperature and friction force caused by friction between metals can be better prevented from rising, and the UV ink is endowed with energy, thereby leading to the risk of agglomeration and solidification of the UV ink.

3. According to the utility model, through the matching design of the first metal sealing ring and the first rubber sealing ring and the matching design of the throat sealing assembly, the sealing requirement of UV ink fluid substances can be met, the friction coefficient can be reduced, the transmission of transmission energy caused by static electricity, temperature, pressure and the like generated by friction is reduced, and the risk of denaturation caused by energy absorption of UV ink is avoided.

4. The third one-way valve sealing structure is the maximum conveying pressure lifting point of the whole plunger pump body and is also the occurrence point of the maximum friction coefficient of the piston position. The inventor starts with a sealing material rubbed with the inner wall of the cavity, adopts a steel ball gravity sealing structure, and designs a copper vehicle part with a V-shaped diversion trench made of metal material, as the inner wall of the cavity, the center position is sealed by the steel ball, the steel ball pushes up a circulation channel when UV ink is gushed up, the steel ball is blocked on a steel ball bearing part under the action of gravity and fluid during countercurrent, the UV ink cannot realize countercurrent, meanwhile, a gap in a small cavity where the steel ball moves is very large, the generated friction force is almost not generated, the sealing of the inner wall of the cavity adopts a soft metal copper vehicle part as a sealing structure, and the V-shaped diversion trench on the copper vehicle part 644 is close to the inner wall of the cavity.

5. Through further setting up temperature sensor and pressure sensor, can shut down immediately when detecting the high temperature, utilize the bypass valve pressure release backward flow on the pressure release pipeline when detecting the pressure is too high, further avoid UV printing ink to receive too high energy and take place the qualitative change.

6. The special ink supply equipment for UV ink integrates temperature control, pressure relief protection and friction coefficient control, improves sealing materials, improves the sealing materials which cannot react with the UV ink, and simultaneously meets the conveying requirement that the UV ink is not coked and solidified by matching with the improvement of a structure. Through multiple tests, the special ink supply equipment for the UV ink disclosed by the utility model has the advantages that the characteristics of the UV ink are not influenced or changed by the transported UV ink, and the transport equipment for the UV ink is developed.

Drawings

FIG. 1 is a schematic diagram of a special ink supply device for UV ink 1;

FIG. 2 is a schematic diagram 2 of a special ink supply device for UV ink according to the present utility model;

FIG. 3 is a schematic diagram of a plunger pump according to the present utility model;

FIG. 4 is a cross-sectional view of a plunger pump according to the present utility model;

FIG. 5 is a schematic view of a third check valve seal structure according to the present utility model;

FIG. 6 is a schematic view 1 of a second check valve seal structure according to the present utility model;

FIG. 7 is a schematic view 2 of a second check valve seal structure according to the present utility model;

FIG. 8 is a schematic view of the connection structure of the throat seal assembly and the second central shaft portion according to the present utility model.

Reference numerals in the drawings: 1-pneumatic lifting frame, 2-PLC control electric box, 3-PLC touch screen, 4-chassis fixing plate, 5-pneumatic motor, 6-plunger pump, 61-pump body base, 62-primary cavity, 63-secondary cavity, 631-disk, 632-first metal sealing ring 633-a first rubber sealing ring, 64-a three-stage cavity, 641-steel balls, 642-a steel structure cavity, 6421-a steel ball upper limit part 643-stainless steel supporting piece, 6431-steel ball supporting part, 644-copper vehicle piece, 65-four-stage cavity, 651-connecting piece, 66-first central shaft 67-second center shaft, 68-first check valve seal structure, 69-throat seal assembly, 691-first steel sheet seal rubber ring, 692-second steel sheet seal rubber ring, 693-third steel sheet seal rubber ring, 6931-V type rubber ring, 694-first copper center calibration piece, 695-second copper center calibration piece, 696-first seal gasket, 697-second seal gasket, 7-oil drum seal platen, 8-pressure sensor, 9-evacuation high pressure valve, 10-temperature sensor, 11-pressure relief pipeline, 12-spliced pole, 13-air source proportional valve.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the following further details of the present utility model will be described with reference to examples and drawings.

As shown in fig. 1-8, the special ink supply device for UV ink provided by the utility model comprises a pneumatic lifting frame 1, a PLC control electric box 2, a PLC touch screen 3, a chassis fixing plate 4, a driving mechanism and a plunger pump 6, wherein the pneumatic lifting frame 1 is fixedly connected to the chassis fixing plate 4, an oil drum sealing pressure plate 7 is movably mounted on the chassis fixing plate 4, the PLC control electric box 2 and the PLC touch screen 3 are both connected to one side of the pneumatic lifting frame 1, the PLC control electric box 2 is electrically connected with the PLC touch screen 3, the driving mechanism is connected to the top of the pneumatic lifting frame 1, one end of the plunger pump 6 is connected with the driving mechanism, and the other end of the plunger pump 6 is connected with the oil drum sealing pressure plate 4; the plunger pump 6 comprises a pump body base 61, a first-stage cavity 62, a second-stage cavity 63, a third-stage cavity 64, a fourth-stage cavity 65, a first central shaft 66 and a second central shaft 67, wherein the first-stage cavity 62, the second-stage cavity 63, the third-stage cavity 64 and the fourth-stage cavity 65 are sequentially connected, the first-stage cavity 62 is arranged in the pump body base 61, the first central shaft 66 is positioned in the first-stage cavity 62 and the second-stage cavity 63, the second central shaft 66 is positioned in the third-stage cavity 64 and the fourth-stage cavity 65, a first one-way valve sealing structure 68 is arranged in the first-stage cavity 62, a second one-way valve sealing structure is arranged in the second-stage cavity 63, and a third one-way valve sealing structure is arranged in the third-stage cavity 64.

Specifically, through changing the cavity internal structure design and the sealed design of plunger pump 6, can not change the characteristic of UV printing ink when the pump UV printing ink, and plunger pump 6 is equipped with one-level cavity 62, second grade cavity 63 and tertiary cavity 64 and comes tertiary promotion UV printing ink, can satisfy the long-range transport demand of UV printing ink.

In this embodiment, the pump body base 61 is a concave confluence base, the pump body base 61 is connected with the oil drum sealing platen 7, the primary cavity 62 is communicated with the pump body base 61, and one end of the first central shaft 66 is movably connected with the first check valve sealing structure 68.

Specifically, by designing the pump body base 61 as a concave confluence base, the UV ink can be filled into the primary cavity 62 when the first central shaft 66 reciprocates by using the concave confluence fluid principle. And the movable gap of the first check valve sealing structure 68 is larger, so that the risk of agglomeration and solidification of the UV ink caused by the fact that the temperature and friction force are increased due to friction between metals can be better prevented.

In this embodiment, the second check valve sealing structure includes a disc 631, a first metal sealing ring 632 and a first rubber sealing ring 633, the disc 631 is close to the primary cavity 62, the first rubber sealing ring 623 is close to the tertiary cavity 64, the first metal sealing ring 632 is located between the disc 631 and the first rubber sealing ring 633, the first metal sealing ring 632 is connected with the disc 631 in a matching manner, and the third check valve sealing structure is a steel ball gravity sealing structure. The first metal seal ring 632 is a soft metal seal seat, and an annular V groove is disposed at an upward position of the first rubber seal ring 633.

Specifically, when UV ink is to be flushed into the secondary cavity 63 from the low-pressure cavity-primary cavity, the second one-way valve sealing structure is required to ensure that UV ink lifted up by the primary cavity of the primary section is not reversed, and further ensure that UV ink can be flushed out when the third one-way valve sealing structure is extruded downwards, and meanwhile, the sealing friction coefficient between the second one-way valve sealing structure and the first central shaft 66 is reduced as much as possible. In the utility model, when the disk 631 is close to the first metal seal ring 632, the sealing ink is reversed, so that the opening and sealing states can be realized. Meanwhile, the first rubber sealing ring 633 prevents the first metal sealing ring 632 from moving upwards too much, and is opened when the fluid ink is lifted upwards, and is closed when the fluid ink is reversed, and the second one-way valve sealing structure is subjected to ink pressing pressure by the first metal sealing ring 632, so that the ink is prevented from flowing reversely. The first rubber seal 633 of design, and first rubber seal 633 designs into the V mouth up the position, and when printing ink backward flow, V mouth atress increases, promotes first metal seal 632 and disk 631 and forms sealing state, when guaranteeing that the reciprocating motion of the second center pin 67 in the tertiary chamber pushes down, printing ink can not flow backward. Because the first metal sealing ring 632 can reciprocate along with the ink and the concentric sealing position is fixed by the first central shaft 66, the friction force, the temperature and the static electricity generated by the movement are controlled, and the sealing requirement of the plunger pump 6 for lifting the ink is met, so that the disc 631, the first metal sealing ring 632 and the first rubber sealing ring 633 in the second one-way valve sealing structure are obtained through strict screening experiments no matter the structure or the material.

In this embodiment, the steel ball gravity sealing structure is composed of a steel ball 641, a steel structure cavity 642 and a stainless steel bearing 643, the steel structure cavity 642 is connected with one end of the stainless steel bearing 643, the steel structure cavity 642 is provided with a steel ball upper limit portion 6421, the stainless steel bearing 643 is provided with a steel ball bearing portion 6431, and the steel ball 641 is movably mounted on the steel ball bearing portion 6431.

In this embodiment, a copper car 644 is disposed between the steel cavity 642 and the stainless steel support 643, a V-shaped diversion trench is disposed at an upward position of the copper car 644, a square opening is disposed on the stainless steel support 643, the other end of the first central shaft 66 is movably connected with the other end of the stainless steel support 643, and one end of the second central shaft 67 is movably connected with the top of the copper cavity 642. The copper car 644 is a soft metal seal ring, which plays a role in sealing, and prevents UV ink from seeping out from the joint of the steel structure cavity 642 and the stainless steel support 643. The copper car part 644 can be made of copper, aluminum or plastic steel, and in this embodiment, the copper car part 644 is made of copper.

Specifically, the gravity sealing structure of steel balls in the three-stage cavity 64 is the maximum conveying pressure lifting point of the pump body of the whole plunger pump 6 and the occurrence point of the maximum friction coefficient of the piston position, the inventor starts with the sealing material rubbed with the inner wall of the cavity, adopts the gravity sealing structure of the steel balls, designs the copper car part 644 of the metal material and the V-shaped guide groove as the inner wall of the cavity, seals the center position by the steel balls 641, and pushes up the flow channel when the UV ink is gushed up, at the moment, the steel balls 641 are pushed up to the upper limit part 6421 of the steel balls, and when the steel balls 641 are in countercurrent, the steel balls are blocked on the steel ball bearing part 6431 under the action of gravity and fluid, the UV ink can not realize countercurrent, meanwhile, the gap in the small cavity where the steel balls 641 move is very large, the generated friction force is almost not generated, and the sealing of the inner wall of the cavity adopts the copper car part 644 as the sealing structure, and the V-shaped guide groove on the copper car part 644 is close to the inner wall of the cavity.

In this embodiment, the driving mechanism is an air motor 5, and the other end of the second central shaft 67 is movably connected with the central shaft of the air motor 5.

In this embodiment, the top of the fourth-stage cavity 65 is connected with a throat sealing assembly 69, a plurality of sealing rings are arranged in the throat sealing assembly 69, each sealing ring comprises a first steel sheet sealing rubber ring 691, a second steel sheet sealing rubber ring 692 and a third steel sheet sealing rubber ring 693, each of the first steel sheet sealing rubber ring 691, the second steel sheet sealing rubber ring 692 and the third steel sheet sealing rubber ring 693 is composed of a V-shaped rubber ring 6931 and a metal seat, and the metal seat is sleeved on the V-shaped rubber ring. A copper center calibration piece is arranged between the second steel sheet sealing rubber ring 692 and the third steel sheet sealing rubber ring 693, the copper center calibration piece comprises a first copper center calibration piece 694 and a second copper center calibration piece 695, a first sealing gasket 696 is arranged between the first steel sheet sealing rubber ring 691 and the second steel sheet sealing rubber ring 692, and a second sealing gasket 697 is arranged between the first copper center calibration piece 694 and the second copper center calibration piece 695.

Through setting up first steel sheet sealing rubber circle 691, second steel sheet sealing rubber circle 692 and third steel sheet sealing rubber circle 693, and second steel sheet sealing rubber circle 692 and third steel sheet sealing rubber circle 693 are by V type rubber circle 6931 and metal seat constitution, the metal seat cover is established on V type rubber circle, the metal seat is the rigidity shell fragment sealing washer, through increasing the rigidity shell fragment, utilize pressure conduction rigidity shell fragment to open can reduce the area that first steel sheet sealing rubber circle 691, second steel sheet sealing rubber circle 692 and third steel sheet sealing rubber circle 693 contacted piston rod second center pin 67, can realize again that the seal does not reveal the problem, adopt the rigidity metal can strengthen whole sealing washer rigidity simultaneously, coefficient of friction has been reduced simultaneously, make static and the temperature that the friction produced all can reach the threshold value of UV printing ink denaturation. The copper center calibration piece is used for calibrating the second center shaft 67 without deflection when moving up and down, and preventing the excessive friction. The provision of the first and second seal washers 696, 697 can provide a sealing effect against the inner wall of the metal base and the copper center calibration piece.

In this embodiment, a plurality of connecting pieces 651 are disposed on the outer side of the quaternary cavity 65, the air motor 5 is fixedly connected with the quaternary cavity 65 through the connecting pieces 651, a pressure sensor 8, an evacuation high-pressure valve 9 and a temperature sensor 10 are further disposed on the outer side of the quaternary cavity 65, and the pressure sensor 8 is connected with the evacuation high-pressure valve 9. The high-pressure evacuation valve 9 is used to connect an external delivery pipe, and when the UV ink reaches the quaternary chamber 65, the ink is output from the high-pressure evacuation valve 9 and delivered to a designated place.

In this embodiment, the ink supply apparatus further includes a pressure relief pipeline 11, one end of the pressure relief pipeline 11 is communicated with the fourth-stage cavity 65, the other end of the pressure relief pipeline 11 is connected with the oil drum sealing platen 7, the pressure relief pipeline 11 extends out of the oil drum sealing platen 7, and a bypass valve (not shown in the drawing) is disposed on the pressure relief pipeline 11.

In this embodiment, a temperature sensor (not shown in the drawing) is also disposed on the outer side of the secondary cavity 63, and the temperature sensor is matched with the temperature sensor 10 on the outer side of the quaternary cavity 65, so that the temperature of the UV ink can be better monitored, and the energy of the UV ink can be better controlled in the pumping process to prevent quality changes.

By arranging the temperature sensor 10, when the temperature of the UV ink in the cavity is too high, the temperature sensor 10 can immediately detect the UV ink, so that the shutdown is controlled, and the occurrence of quality change caused by the fact that the UV ink receives too high energy is avoided. Through setting up pressure sensor 8, when the pressure in the plunger pump 6 pump body is too high, pressure sensor 8 can detect and feed back, and the bypass valve on the pressure release pipeline 11 is opened this moment, and partial UV printing ink is in the outside oil drum through the pressure release pipeline backward flow, avoids the UV printing ink to receive too high energy and take place the matter change.

In this embodiment, the ink supply device further includes two connection columns 12 and an air source proportional valve 13, one ends of the two connection columns 12 are connected with the pneumatic lifting frame 1, the other ends of the two connection columns 12 are connected with the oil drum sealing pressure plate 7, the two connection columns 12 are respectively located at two sides of the plunger pump 6, and the air source proportional valve 13 is connected to the other side of the pneumatic lifting frame 1.

Specifically, the pneumatic lifting frame 1 can lift, and as the two ends of the connecting column 12 are respectively connected with the pneumatic lifting frame 1 and the oil drum sealing pressing plate 7, the pneumatic lifting frame 1 can drive the oil drum sealing pressing plate 7 to lift, so that the oil drum sealing pressing plate 7 is convenient to connect with an external UV ink oil drum.

The foregoing examples are merely exemplary embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the spirit of the utility model, and that these obvious alternatives fall within the scope of the utility model.

Claims (10)

1. The special ink supply device for the UV ink is characterized by comprising a pneumatic lifting frame, a PLC control electric box, a PLC touch screen, a chassis fixing plate, a driving mechanism and a plunger pump, wherein the pneumatic lifting frame is fixedly connected to the chassis fixing plate, an oil drum sealing pressure plate is movably installed on the chassis fixing plate, the PLC control electric box and the PLC touch screen are both connected to one side of the pneumatic lifting frame, the PLC control electric box is electrically connected with the PLC touch screen, the driving mechanism is connected to the top of the pneumatic lifting frame, one end of the plunger pump is connected with the driving mechanism, and the other end of the plunger pump is connected with the oil drum sealing pressure plate; the plunger pump comprises a pump body base, a first-stage cavity, a second-stage cavity, a third-stage cavity, a fourth-stage cavity, a first central shaft and a second central shaft, wherein the first-stage cavity, the second-stage cavity, the third-stage cavity and the fourth-stage cavity are sequentially connected, the first-stage cavity is arranged in the pump body base, the first central shaft is positioned in the first-stage cavity and the second-stage cavity, the second central shaft is positioned in the third-stage cavity and the fourth-stage cavity, a first check valve sealing structure is arranged in the first-stage cavity, a second check valve sealing structure is arranged in the second-stage cavity, and a third check valve sealing structure is arranged in the third-stage cavity.

2. The special ink supply device for UV ink according to claim 1, wherein the pump body base is a concave confluence base, the pump body base is connected with the oil drum sealing pressure plate, the primary cavity is communicated with the pump body base, and one end of the first central shaft is movably connected with the first one-way valve sealing structure.

3. The special ink supply device for UV ink according to claim 2, wherein the second one-way valve sealing structure comprises a disc-shaped disc, a first metal sealing ring and a first rubber sealing ring, the disc-shaped disc is close to the primary cavity, the first rubber sealing ring is close to the tertiary cavity, the first metal sealing ring is located between the disc-shaped disc and the first rubber sealing ring, the first metal sealing ring is connected with the disc-shaped disc in a matched mode, and the third one-way valve sealing structure is a steel ball gravity sealing structure.

4. The special ink supply device for UV ink according to claim 3, wherein the steel ball gravity sealing structure comprises steel balls, a steel structure cavity and a stainless steel support, the steel structure cavity is connected with one end of the stainless steel support, the steel structure cavity is provided with a steel ball upper limit part, the stainless steel support is provided with a steel ball support part, and the steel balls are movably mounted on the steel ball support part.

5. The special ink supply device for UV ink according to claim 4, wherein the first rubber sealing ring is provided with an annular V-shaped groove at an upward position, a copper vehicle part is arranged between the steel structure cavity and the stainless steel support part, a V-shaped diversion trench is arranged at the upward position of the copper vehicle part, a square opening is arranged on the stainless steel support part, the other end of the first central shaft is movably connected with the other end of the stainless steel support part, and one end of the second central shaft is movably connected with the top of the steel structure cavity.

6. The special ink supply device for UV ink according to claim 5, wherein the driving mechanism is an air motor, and the other end of the second central shaft is movably connected with the central shaft of the air motor.

7. The special ink supply device for UV ink according to claim 6, wherein the top of the quaternary cavity is connected with a throat sealing assembly, a plurality of sealing rings are arranged in the throat sealing assembly, each sealing ring comprises a first steel sheet sealing rubber ring, a second steel sheet sealing rubber ring and a third steel sheet sealing rubber ring, each of the first steel sheet sealing rubber ring, the second steel sheet sealing rubber ring and the third steel sheet sealing rubber ring is composed of a V-shaped rubber ring and a metal seat, the metal seat is sleeved on the V-shaped rubber ring, a copper center calibration piece is arranged between the second steel sheet sealing rubber ring and the third steel sheet sealing rubber ring, each copper center calibration piece comprises a first copper center calibration piece and a second copper center calibration piece, a first sealing gasket is arranged between the first steel sheet sealing rubber ring and the second steel sheet sealing rubber ring, and a second sealing gasket is arranged between the first copper center calibration piece and the second copper center calibration piece.

8. The special ink supply device for UV ink according to claim 7, wherein a plurality of connecting pieces are arranged on the outer side of the quaternary chamber, the pneumatic motor is fixedly connected with the quaternary chamber through the connecting pieces, a pressure sensor, an emptying high-pressure valve and a temperature sensor are further arranged on the outer side of the quaternary chamber, and the pressure sensor is connected with the emptying high-pressure valve.

9. The special ink supply device for UV ink according to claim 8, further comprising a pressure relief pipeline, wherein one end of the pressure relief pipeline is communicated with the quaternary cavity, the other end of the pressure relief pipeline is connected with the oil drum sealing pressure plate, the pressure relief pipeline extends out of the oil drum sealing pressure plate, and a bypass valve is arranged on the pressure relief pipeline.

10. The special ink supply device for UV ink according to claim 9, further comprising two connecting columns and an air source proportional valve, wherein one ends of the two connecting columns are connected with the pneumatic lifting frame, the other ends of the two connecting columns are connected with the oil drum sealing pressure plate, the two connecting columns are respectively positioned on two sides of the plunger pump, and the air source proportional valve is connected on the other side of the pneumatic lifting frame.