CN210460971U

CN210460971U - Doublestage flow mill base feeding mechanism of color mixer

Info

Publication number: CN210460971U
Application number: CN201921542264.4U
Authority: CN
Inventors: 许红涛; 刘鹏; 栾翔; 赵洪华; 孙久亮
Original assignee: Zhengzhou Sanhui Machinery & Equipment Co ltd
Current assignee: Zhengzhou Sanhui Machinery & Equipment Co ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-05-05
Anticipated expiration: 2029-09-17

Abstract

The utility model relates to a doublestage flow mill base feeding mechanism of color mixer, including pump and switching-over valve, the pump includes pump case, piston rod, little pump body, is fixed with big piston and little piston on the piston rod, and the upper portion of valve body still is equipped with the valve body connecting cylinder of being connected with the pump case lower extreme, is fixed with the elasticity jack catch between the lower extreme of pump case and the valve body connecting cylinder, and the bottom of valve body connecting cylinder still is equipped with first import and export and import and export with the second, can change the first import and export, import and export with the valve core chamber's the state of intercommunication during the case rotates; according to the color paste pouring device, the large piston and the small piston are arranged on the piston rod, the elastic clamping jaw and the movable small pump body are arranged in the pump shell, the first inlet and the second inlet are arranged on the valve body connecting cylinder, which is connected with the pump shell, of the reversing valve, and the first inlet and the second inlet are controlled by rotating the valve core in the valve body of the reversing valve according to different color paste amounts required by color mixing, so that the high-flow efficient pouring and/or the low-flow high-precision pouring of the color paste are realized.

Description

Doublestage flow mill base feeding mechanism of color mixer

Technical Field

The utility model relates to a coating mixing of colors technique, especially a doublestage flow mill base feeding mechanism of mixing of colors machine.

Background

In the color mixing technology, color mixing has strict requirements on the amount of color paste, and the error of the injection amount of the color paste cannot exceed a certain proportion range when a color paste pump pumps the color paste, so that higher color mixing precision is achieved. The current toning technology is commonly used with reciprocating type toning slurry pumps, such as piston pumps, plunger pumps, folding pumps and the like, and the stroke of the toning pump is controlled by a stepping motor to realize the control of the pouring amount of the toning slurry; when the outlet flow of the toning pump is large, even if a small deviation occurs in the stroke of the toning pump, the color paste injection amount can also be caused to have a large deviation; in order to ensure the control precision of the color paste injection amount, some manufacturers use a color paste pump with smaller outlet flow or inner diameter to pump color paste, although the scheme can meet the requirement of the precision control of the color paste injection amount, because the outlet flow or the inner diameter is smaller, the color paste pump needs larger stroke when injecting the same amount of color paste, the requirements of the precision control of the color paste injection amount and the injection amount cannot be met simultaneously, and the color paste pump needs larger stroke and more injection time when the outlet flow or the inner diameter is smaller, so that the working efficiency is low. In order to meet the requirements of color paste injection amount and injection amount precision control, some manufacturers set two color mixers at the same time, wherein one color mixer uses a pump with larger outlet flow to meet the requirement of quick grouting, and the other color mixer uses a pump with smaller outlet flow to adjust the color paste injection amount.

The U.S. patent document with publication number US2009236367a1 discloses a piston pump with double nozzles, wherein a large piston, a small piston and a spring are arranged on a piston rod in a pump shell, so that a large amount of paste can be discharged and a small amount of paste can be discharged, a large amount of paste is discharged when the large piston and the small piston move downwards together, after the pistons touch the bottom, the piston rod overcomes the elasticity of the spring and continuously presses the small piston downwards into a small piston cavity through a thin rod, and the micro amount of paste discharged is realized so as to realize the high-precision control and adjustment of the discharged amount; adopt the spring to control the operating condition of big, little piston as elastic element in this scheme, because plastic deformation can appear after the spring is used for a long time, be unfavorable for keeping the control accuracy of spring axis direction for this structural reliability is poor.

In addition, no matter two color paste pumps are adopted or a color paste pump with double nozzles is adopted, two color paste outlets are required to be controlled through the reversing valve, the existing reversing valve is complex in structure and poor in reliability, and the control requirement when color paste is poured out by the color mixing pump with the double nozzles cannot be met.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a doublestage flow mill base feeding mechanism of color mixer can satisfy the needs that large-traffic mill base was annotated out fast and can also realize that the high accuracy of little flow mill base is annotated out, can satisfy the color mixer and annotate out high-efficient, the high accuracy demand to the mill base of different dosages.

In order to solve the problems, the utility model provides a doublestage flow mill base feeding mechanism of color mixer, including pump and switching-over valve, the pump includes pump case, piston rod, be fixed with on the piston rod can follow the piston rod is in reciprocating motion's piston in the pump case, the switching-over valve includes valve body and case, be equipped with on the valve body and be used for the feed inlet of being connected with mill base feed bucket and be used for the discharge gate of being connected with the mixing of colors device, the upper portion of valve body still is equipped with the valve body connecting cylinder of being connected with the pump case lower extreme, the piston includes big piston and little piston, little piston is fixed at the lower extreme of piston rod, big piston is fixed on the piston rod and is located the top of little piston, the external diameter of big piston with the inner wall sealing connection of pump case; an elastic clamping jaw is fixed between the lower end of the pump shell and the valve body connecting cylinder, the elastic clamping jaw is used for positioning a small pump body in the valve body connecting cylinder so that the lower end face of the small pump body is connected with the lower end face of the valve body connecting cylinder in a sealing mode, the outer diameter of the small piston is connected with the inner wall of the small pump body in a sealing mode and can reciprocate in the small pump body, and the small piston can drive the small pump body to be separated from the elastic clamping jaw to move upwards when moving upwards for a certain height along with the piston rod; specifically, the valve body connecting cylinder and the valve body can be of a split structure or an integral structure, and preferably, the valve body connecting cylinder and the valve body are integrally formed;

the bottom of the valve body connecting cylinder is also provided with a first inlet and a second inlet corresponding to the inner cavity of the small pump body and the inner cavity of the pump shell; the valve body is provided with a cylindrical cavity penetrating through the left side and the right side of the valve body, the valve body connecting cylinder can be communicated with the cavity through the first inlet and the second inlet, the feed port is positioned at the right end of the cavity, the side wall of the left end of the cavity is provided with a side wall feed port, the side wall feed port is communicated with the feed port through an external pipeline positioned outside the cavity on the valve body, and the bottom of the left end of the cavity is provided with the discharge port;

still install in the cavity and be cylindricly and can the cavity internal rotation the case, the case right-hand member seals just the right-hand member of case will the left and right two parts of mutual isolation are cut apart into to the cavity, the inside of case is equipped with the case chamber, be equipped with on the lateral wall of case and be used for the intercommunication the lateral wall feed inlet with the case feed inlet in case chamber, be used for the intercommunication the discharge gate with the case discharge gate in case chamber and multiunit respectively with first import and export the correspondence is in can change when the case rotates first import and export the second import and export with the through-flow hole of case chamber intercommunication state.

The utility model provides a color mixer's doublestage flow mill base feeding mechanism still has following technical characteristic:

further, still be equipped with in the valve body connecting cylinder to the guide positioning ring that the inner chamber of pump case extends, the lower extreme of the little pump body can stretch into in the guide positioning ring, the outer wall of the little pump body with the inner wall sealing connection of guide positioning ring, first import and export with the inner chamber intercommunication of guide positioning ring, the second import and export with the outer wall of guide positioning ring, the cavity intercommunication between the inner wall of valve body connecting cylinder.

Further, a sealing ring is fixed on the outer wall of the lower end of the small pump body and used for plugging a gap between the outer wall of the small pump body and the inner wall of the guide positioning ring.

Furthermore, a snap ring is arranged on the outer wall of the small pump body, a clamping groove matched with the elastic clamping jaw is arranged on the snap ring, the elastic clamping jaw is matched with the clamping groove to fix the small pump body at the lower end of the valve body connecting cylinder and enable the lower end of the small pump body to be abutted against the lower end face of the valve body connecting cylinder; when the small piston moves upwards for a certain height along with the piston rod, the small piston can drive the small pump body to move upwards so that the elastic clamping jaws deform outwards and are separated from the clamping grooves.

Furthermore, a circular fixing ring is fixed between the lower end of the pump shell and the valve body connecting cylinder, and a plurality of elastic clamping claws are arranged on the fixing ring.

Further, a plurality of the elasticity jack catch is evenly distributed on the solid fixed ring, for example: 8, 6, 4 or 3, etc.

Furthermore, the large piston is fixed on the piston rod through two pressing sheets, and the small piston is fixed at the lower end of the piston rod through a nut.

Furthermore, the piston rod comprises a large piston rod and a small piston rod, the upper end of the small piston rod and the lower end of the large piston rod are fixedly connected through threads, the large piston is fixed at the lower end of the large piston rod, and the small piston is fixed at the lower end of the small piston rod.

Further, a first return port corresponding to the first inlet/outlet and a second return port corresponding to the second inlet/outlet are formed in the side wall of the right end of the valve core, and when the first return port and the second return port on the valve core are respectively communicated with the first inlet/outlet and the second inlet/outlet on the valve body, the side wall feed port is communicated with the valve core cavity through the valve core feed port;

a first large-flow injection outlet and a second large-flow injection outlet which are staggered with the first return port and the second return port and respectively correspond to the first inlet and the second outlet are also arranged on the side wall at the right end of the valve core, and when the valve core is rotated to enable the first large-flow injection outlet and the second large-flow injection outlet to be respectively communicated with the first inlet and the second outlet on the valve body, the valve core discharge port communicates the discharge port with the valve core cavity;

the side wall of the right end of the valve core is also provided with a small-flow injection port which is staggered with the first backflow port and the first large-flow injection port and corresponds to the first inlet and the first outlet, the side wall of the right end of the valve core is also provided with a low-resistance backflow port which is staggered with the second backflow port and the second large-flow injection port and is used for communicating the second inlet and the second outlet and the feed inlet, and when the valve core is rotated to enable the small-flow injection port to be communicated with the first inlet and the second outlet to be communicated with the feed inlet through the low-resistance backflow port and the discharge port of the valve core to be communicated with the valve core cavity.

Further, the right side of the cavity of valve body is equipped with the annular, the right-hand member of case be equipped with the annular cooperation is in order to cut apart the right baffle of cavity, the left cavity of right baffle with first import and export the second import and export the intercommunication, the cavity on baffle right side with the feed inlet intercommunication.

Furthermore, a first connecting line of the center of the first return port and the center of the second return port on the outer cylindrical surface of the valve core is parallel to the central axis of the valve core, a second connecting line of the center of the first large-flow injection port and the center of the second large-flow injection port on the outer cylindrical surface of the valve core is parallel to the central axis of the valve core, and a third connecting line of the center of the small-flow injection port and the center of the low-resistance return port on the outer cylindrical surface of the valve core is parallel to the central axis of the valve core; the central angle corresponding to the outer cylindrical surface between the first connecting line and the second connecting line on the valve core is 90 degrees, and the central angle corresponding to the outer cylindrical surface between the first connecting line and the third connecting line on the valve core is 90 degrees.

Furthermore, the front side wall and the rear side wall of the left end of the cavity of the valve body are respectively provided with the side wall feeding holes, and the two side wall feeding holes are symmetrically arranged around the central axis of the cavity of the valve body; the side wall of the left end of the valve core is also provided with two valve core feeding holes, the two valve core feeding holes are respectively positioned on the second connecting line and the third connecting line, the two side wall feeding holes can be respectively communicated with the valve core cavity through the valve core feeding holes, and the valve core feeding holes can be communicated with the discharging holes when rotating along with the valve core.

Further, the aperture of the valve core feed port on the third connecting line is larger than that of the valve core feed port on the second connecting line.

Furthermore, the discharge port on the valve body is a reducing through hole, and the aperture of one end of the discharge port communicated with the cavity in the valve body is smaller than that of the other end of the discharge port.

Furthermore, the left end of the valve core is also provided with a detachable valve core plug and a valve core end cover, and the valve core plug is used for plugging the left end of the valve core.

Furthermore, the left end of the valve core is also provided with a deflector rod which radially penetrates through the valve core, the valve core plug and the valve core end cover, and the deflector rod can drive the valve core to rotate in the cavity of the valve body.

The utility model discloses following beneficial effect has: the large piston and the small piston are arranged on the piston rod, the elastic clamping jaw and the movable small pump body are arranged in the pump shell, the first inlet and the second inlet corresponding to the inner cavity of the small pump body and the second inlet and the second outlet corresponding to the inner cavity of the pump shell are arranged on the valve body connecting cylinder of the reversing valve connected with the pump shell, and the first inlet and the second inlet are controlled to be communicated with the valve core cavity by rotating the valve core in the valve body of the reversing valve according to the color paste amount required by color mixing, the motion state and the stroke of the piston rod, so that the high-flow high-efficiency pouring-out and/or the low-flow high-.

Drawings

Fig. 1 is a schematic structural view of a two-stage flow color paste supply device of a color mixer according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the dual-stage flow mill base supply of the tinting machine of FIG. 1;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

fig. 4 is a schematic structural diagram of a valve body in an embodiment of the present invention;

FIG. 5 is a cross-sectional view of the valve body of FIG. 4;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 7 is a cross-sectional view taken along line C-C of FIG. 5;

FIG. 8 is a schematic view of the valve body of FIG. 4 from another perspective;

fig. 9 is a cross-sectional view of a pump in an embodiment of the invention;

FIG. 10 is a schematic structural view of the pump according to the embodiment of the present invention when the small piston moves in the small pump body;

FIG. 11 is a schematic structural view of the pump in an embodiment of the present invention when the small pump body is about to be separated from the elastic claw;

fig. 12 is a schematic structural view of the pump after the small pump body is separated from the elastic claw in the embodiment of the present invention;

fig. 13 is a schematic structural diagram of a piston rod according to an embodiment of the present invention;

fig. 14 is a schematic structural view of a small pump body in an embodiment of the present invention;

fig. 15 is a schematic structural view of an elastic claw in an embodiment of the present invention;

fig. 16 is a schematic structural view of the reversing valve in the embodiment of the present invention in a strong backflow state;

FIG. 17 is a front view of the reversing valve of FIG. 16;

FIG. 18 is a cross-sectional view taken in the direction D-D of FIG. 17;

FIG. 19 is a right side elevational view of the reversing valve of FIG. 16; (ii) a

FIG. 20 is a cross-sectional view taken in the direction E-E of FIG. 19;

fig. 21 is a schematic structural view of the reversing valve in the embodiment of the present invention in the large flow discharge state;

FIG. 22 is a longitudinal cross-sectional view of the diverter valve of FIG. 21;

FIG. 23 is a sectional view taken in the direction F-F in FIG. 22;

fig. 24 is a longitudinal sectional view of the diverter valve in an embodiment of the present invention in a low-flow pour-out state;

FIG. 25 is a sectional view taken in the direction G-G of FIG. 24;

fig. 26 is a schematic structural diagram of a valve element in an embodiment of the present invention;

FIG. 27 is a structural schematic view from another perspective of the valve cartridge of FIG. 26;

FIG. 28 is a structural schematic view from another perspective of the valve cartridge of FIG. 26;

fig. 29 is a cross-sectional view of a valve cartridge in an embodiment of the invention;

FIG. 30 is a sectional view taken in the direction H-H in FIG. 29;

fig. 31 is a schematic structural view of a piston rod according to another embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In one embodiment of the dual-stage flow mill base supply device of the color mixer of the present invention as shown in figures 1 to 31, the double-stage flow color paste supply device of the color mixer comprises a pump and a reversing valve, wherein the pump comprises a pump shell 10 and a piston rod 20, a piston which can reciprocate in the pump shell 10 along with the piston rod 20 is fixed on the piston rod 20, the reversing valve comprises a valve body 50 and a valve core 60, a feed inlet 501 used for being connected with the color paste feed barrel 80 and a discharge outlet 502 used for being connected with the color mixing device are arranged on the valve body 50, it is characterized in that the upper part of the valve body 50 is also provided with a valve body connecting cylinder 70 connected with the lower end of the pump shell 10, the piston comprises a large piston 21 and a small piston 22, the small piston 22 is fixed at the lower end of the piston rod 20, the large piston 21 is fixed on the piston rod 20 and positioned above the small piston 22, and the outer diameter of the large piston 21 is in sealing fit with the inner wall of the pump shell 10 and can slide relatively; an elastic claw 31 is fixed between the lower end of the pump shell 10 and the valve body connecting cylinder 70, the elastic claw 31 is used for positioning the small pump body 40 in the valve body connecting cylinder 70 to enable the lower end face of the small pump body 40 to be connected with the lower end face of the valve body connecting cylinder 70 in a sealing mode, the outer diameter of the small piston 22 is connected with the inner wall of the small pump body 40 in a sealing mode and can reciprocate in the small pump body 40, and the small piston 22 can drive the small pump body 40 to be separated from the elastic claw 31 to move upwards when the small piston 22 moves upwards along with the piston rod 20 for a certain height.

In the above embodiment, specifically, the valve body connecting cylinder 70 and the valve body 50 may be of a separate structure or an integral structure, and preferably, the valve body connecting cylinder 70 and the valve body 50 are integrally formed; the bottom of the valve body connecting cylinder 70 is also provided with a first inlet and outlet 71 corresponding to the inner cavity of the small pump body 40 and a second inlet and outlet 72 corresponding to the inner cavity of the pump shell 10; the valve body 50 is provided with a cylindrical cavity 503 which penetrates through the left side and the right side of the valve body 50, the valve body connecting cylinder 70 can be communicated with the cavity 503 through a first inlet and outlet 71 and a second inlet and outlet 72, the feeding port 501 is positioned at the right end of the cavity 503, the side wall of the left end of the cavity 503 is provided with a side wall feeding port 504, the side wall feeding port 504 is communicated with the feeding port 501 through an external pipeline 505 which is positioned outside the cavity 503 on the valve body 50, and the bottom of the left end of the cavity 503 in the valve body 50 is; the cavity 503 in the valve body 50 is also internally provided with a cylindrical valve core 60 which can rotate in the cavity 503, the right end of the valve core 60 is closed, the right end of the valve core 60 divides the cavity 503 in the valve body 50 into a left part and a right part which are mutually isolated, the valve core cavity 601 is arranged in the valve core 60, the side wall of the valve core 60 is provided with a valve core feed inlet 602 for communicating the side wall feed inlet 504 with the valve core cavity 601, a valve core discharge outlet 603 for communicating the discharge outlet 502 with the valve core cavity 601, and a plurality of groups of through flow holes which respectively correspond to the first inlet and the second outlet 71 and 72 and can change the communication state of the first inlet and the second outlet 71 and the valve core.

According to the double-stage flow color paste supply device of the color mixer, the large piston and the small piston are arranged on the piston rod, the elastic clamping jaws and the movable small pump body are arranged in the pump shell, the first inlet and outlet 71 corresponding to the inner cavity of the small pump body and the second inlet and outlet 72 corresponding to the inner cavity of the pump shell 10 are arranged on the valve body connecting cylinder, connected with the pump shell, of the reversing valve, and the first inlet and outlet 71 and the second inlet and outlet 72 are controlled to be communicated with the valve core cavity 601 by rotating the valve core in the valve body of the reversing valve according to the motion state and the stroke of the piston rod, so that high-flow high-efficiency pouring and/or low-flow high-precision pouring.

In above-mentioned example, this application is through redesign to pump inner structure, and the accessible is to the control of piston rod stroke and the case of switching-over valve to first import and export, second import and export the intercommunication state switch, can realize that large-traffic high efficiency is annotated out and/or low discharge high accuracy is annotated out, can satisfy the requirement that mill base high efficiency was annotated out and can control the grout output with high accuracy again. Specifically, when the piston rod 20 moves upward, the first inlet/outlet 71 and the second inlet/outlet 72 on the valve body connecting cylinder 70 are both communicated with the valve core chamber 601 by controlling the valve core 60 of the reversing valve, the valve core chamber 601 is communicated with the color paste feeding barrel 80 through the valve core feeding port 602, the side wall feeding port 504, the external pipe 505 and the feeding port 501, and the color paste in the color paste feeding barrel 80 is sucked into the cavity in the pump housing 10 through the first inlet/outlet 71 and the second inlet/outlet 72 during the upward movement of the piston rod 20, and the pump is in a strong reflux state at this time, and can quickly suck the color paste into the pump housing through the first inlet/outlet 71 and the second inlet/outlet 72. When the piston rod 20 moves downwards, the color paste in the pump housing 10 can be pumped to the valve core chamber 601 through the first inlet/outlet 71 and the second inlet/outlet 72 through the large piston 21 and the small piston 22 on the piston rod 20, or the first inlet/outlet 71 is pumped to the color mixing device through the discharge port 502 communicated with the valve core chamber 601; in this state, the piston rod is pulled upwards, the pump can pump color paste from the color paste feeding barrel 80 through the reversing valve, the piston is pushed and pulled downwards to return the color paste in the pump and the reversing valve to the color paste feeding barrel 80 again, and the purpose and the effect of flushing each channel of the pump and the valve are achieved, so that the valve core channel of the valve body is prevented from being blocked due to drying or sedimentation of the color paste in the channel of the valve body.

Taking the case that the small pump body is kept at the lower part of the pump shell through the elastic claws in the upward movement process of the piston rod as an example, the upward movement stroke of the piston rod 20 is smaller than or equal to the height of the inner cavity of the small pump body 40, the friction force between the small piston 22 and the inner wall of the small pump body 40 is smaller than the acting force of the elastic claws 31 on the small pump body 40, and the small pump body 40 cannot be separated from the elastic claws 31; if the valve core cavity 601 of the first inlet/outlet 71 on the valve body connecting cylinder 70 is communicated by controlling the valve core 60 of the reversing valve, and the second inlet/outlet 72 is directly communicated with the feeding hole 501 and the color paste feeding barrel 80, the feeding hole 501 is isolated from the valve core cavity 601, when the piston rod moves downwards, the color paste in the small pump body is injected and pumped to the color mixing device under the action of the small piston, the color paste in the cavity between the outer wall of the small pump body and the inner wall of the pump shell flows back to the color paste feeding barrel, only the color paste in the small valve body is injected to the color mixing device through the valve core cavity in this state, small flow injection can be realized so as to adjust the injection amount of the color paste, high-precision control and adjustment of the injection amount of the color paste can be realized, and the working; if the first inlet and outlet 71 and the second inlet and outlet 72 on the valve body connecting cylinder 70 are both communicated with the valve core cavity 601 by controlling the valve core 60 of the reversing valve, the feed inlet 501 is isolated from the valve core cavity 601, and the discharge outlet 502 is communicated with the valve core cavity 601, when the piston rod moves downwards, color paste in the small pump body, the color paste between the outer wall of the small pump body and the inner wall of the pump shell are injected and pumped to the color mixing device through the discharge outlet communicated with the valve core cavity under the action of the small piston and the large piston, so that the color paste can be injected with high flow and high efficiency, and the working state of the pump is a high flow injection.

Taking the case that the piston rod moves upwards and the small piston drives the small pump body to separate from the elastic claw as an example, in this case, the stroke of the upward movement of the piston rod 20 is greater than the height of the inner cavity of the small pump body 40, when the piston rod 20 starts to move upwards, because the friction force between the small piston 22 and the inner wall of the small pump body 40 is less than the acting force of the elastic claw 31 on the small pump body 40, the small pump body 40 cannot move upwards, and when the upward movement stroke of the piston rod 20 is equal to the height of the inner cavity of the small pump body 40, the piston rod 20 continues to move upwards and drives the small pump body 40 to; specifically, the upper end of the small pump body is provided with a through hole with the aperture larger than the diameter of the piston rod and smaller than the outer diameter of the small piston, and when the small piston 22 moves upwards along with the piston rod 20 and contacts the upper end face of the small pump body 40, the small pump body 40 can be driven to move upwards to be separated from the elastic claw 31; after the small pump body 40 is separated from the elastic claw, when the piston rod moves upwards to a preset stroke, the piston rod stops moving, in the process of the piston rod moving upwards, the first inlet/outlet 71 and the second inlet/outlet 72 on the valve body connecting cylinder 70 are both communicated with the valve core cavity 601 by controlling the valve core 60 of the reversing valve, the valve core cavity 601 is communicated with the color paste feeding barrel 80 through the valve core feeding port 602, the side wall feeding port 504, the external pipeline 505 and the feeding port 501, in the process of the piston rod moving upwards, the color paste in the color paste feeding barrel 80 is sucked into the cavity in the pump shell 10 through the first inlet/outlet 71 and the second inlet/outlet 72, and the pump is in a strong.

When the piston rod 20 starts to move downwards, the large piston 12, the small piston 11 and the small pump body 40 synchronously move downwards along with the piston rod 20 (the friction force between the small piston 22 and the inner wall of the small pump body 40 is larger than the resistance of liquid when the small pump body 40 moves downwards, and no relative movement exists between the small piston 22 and the small pump body 40), at this time, the first inlet and the

second outlet

71 and 72 on the valve body connecting cylinder 70 can be communicated with the valve core cavity 601 by controlling the valve core 60 of the reversing valve, the feed inlet 501 is separated from the valve core cavity 601, the discharge outlet 502 is communicated with the valve core cavity 601, color paste in the pump shell 10 is injected and pumped to a color mixing device under the action of the small piston 22 and the large piston 21, so that high-flow color paste and high-efficiency injection can be realized, and the working state of.

When the piston rod 20 moves downwards to enable the lower end face of the small pump body 40 to abut against and seal the lower end face of the valve body connecting cylinder 70, the elastic claw 31 and the small pump body 40 are buckled again, if the valve core 60 of the reversing valve is controlled to enable the first inlet/outlet 71 and the valve core cavity 601 on the valve body connecting cylinder 70 to be communicated and the second inlet/outlet 72 to be directly communicated with the feeding port 501 and the color paste feeding barrel 80, the feeding port 501 is separated from the valve core cavity 601, when the piston rod moves downwards, color paste in the small pump body is injected out and pumped to the color mixing device under the action of the small piston, the color paste in a cavity between the outer wall of the small pump body and the inner wall of the pump shell flows back to the color paste feeding barrel, and only the color paste in the small valve body is injected out to the color mixing device through the valve core cavity in the state, so that the small-flow; in this state, only the color paste in the small pump body 40 is poured out to the color mixing device, and the small flow rate pouring out can be realized so as to adjust the pouring-out amount of the color paste, thereby realizing the high-precision control and adjustment of the pouring-out amount of the color paste, and the working state of the pump is the small flow rate pouring-out state.

In the above embodiment of the present application, preferably, the valve body connecting cylinder 70 is further provided with a guiding positioning ring 73 extending towards the inner cavity of the pump housing 10, the lower end of the small pump body 40 can extend into the guiding positioning ring 73, the outer wall of the small pump body 40 is hermetically connected with the inner wall of the guiding positioning ring 73, the first inlet/outlet 71 is communicated with the inner cavity of the guiding positioning ring 73, and the second inlet/outlet 72 is communicated with the cavity between the outer wall of the guiding positioning ring 73 and the inner wall of the valve body connecting cylinder 70, so that a reliable sealing connection structure can be formed between the lower end of the small pump body 40 and the lower end surface of the valve body connecting cylinder 70. Preferably, a sealing ring 41 is fixed on the outer wall of the lower end of the small pump body 40, and the sealing ring 41 is used for sealing the gap between the outer wall of the small pump body 40 and the inner wall of the guiding and positioning ring 73, so that the lower end of the small pump body 40 and the lower end surface of the valve body connecting cylinder 70 are reliably sealed.

In one embodiment of the present application, preferably, a retaining ring 42 is disposed on an outer wall of the small pump body 40, a clamping groove 43 is disposed on the retaining ring 42 and is matched with the elastic claw 31, the elastic claw 31 is matched with the clamping groove 43 to fix the small pump body 40 at the lower end of the pump housing 10 and to enable the lower end of the small pump body 40 to be connected with the lower end face of the valve body connecting cylinder 70 in a sealing manner; when the small piston 22 moves upwards with the piston rod 20 for a certain height, the small piston 22 can drive the small pump body 40 to move upwards so that the elastic claws 31 deform outwards and are separated from the clamping grooves 43, and therefore the small pump body 40 can be kept at the lower end of the valve body connecting cylinder 70 or move upwards with the piston rod as required. Preferably, an annular fixing ring 30 is fixed to an inner wall of a lower portion of the pump case 10, and a plurality of elastic claws 31 are provided on the fixing ring 30. Preferably, 3, 4, 6 or 8 elastic claws 31 are uniformly distributed on the fixing ring 30, so that the elastic claws can reliably position or unlock the small pump body 40.

In one embodiment of the present application, preferably, the large piston 21 is fixed on the piston rod 20 by two pressing sheets 23, and the small piston 22 is fixed on the lower end of the piston rod 20 by a nut 24, specifically, the pressing sheets 23 may be designed according to the requirement, as shown in fig. 4 to 7, the pressing sheets on the upper and lower sides of the large piston 21 may be different shapes and sizes, that is, two different structures are adopted on the upper and lower sides of the large piston 21. In another embodiment of the present application, as shown in fig. 31, the piston rod 20 includes a large piston rod 201 and a small piston rod 202, the upper end of the small piston rod 202 and the lower end of the large piston rod 201 are fixed by a screw connection, the large piston 21 is fixed at the lower end of the large piston rod 201, and the small piston 22 is fixed at the lower end of the small piston rod 202, thereby facilitating the processing of the piston rod and the installation and fixation of the large piston and the small piston.

In an embodiment of the present application, preferably, a first return port 611 corresponding to the first inlet/outlet 71 and a second return port 612 corresponding to the second inlet/outlet 72 are disposed on a side wall of a right end of the valve core 60, when the first return port 611 and the second return port 612 on the valve core 60 are respectively communicated with the first inlet/outlet 71 and the second inlet/outlet 72 on the valve body 50, the side wall feed port 504 is communicated with the valve core cavity 601 through the valve core feed port 602, and the valve core discharge port 603 is not communicated with the discharge port 502; at this time, color paste in the color paste feeding barrel can enter the valve core cavity 601 through the feeding hole 101, the external pipeline 505, the side wall feeding hole 504 and the valve core feeding hole 602 in sequence, then enter the color paste pump under the suction action of the color paste pump through the first return port 611 and the first inlet/outlet 71, and enter the color paste pump under the suction action of the color paste pump through the second return port 612 and the second inlet/outlet 72, at this time, the valve core cavity 601 is not communicated with the discharging hole 502, the pump can suck the color paste with a large flow rate through the first inlet/outlet 71 and the second inlet/outlet 72, and the reversing valve is in a strong return state when the valve core is in this state, namely, the color paste in the color paste feeding barrel can quickly enter the color paste pump through the first inlet/outlet and the second;

a first large-flow injection outlet 621 and a second large-flow injection outlet 622 which are staggered with the first return port 611 and the second return port 612 and respectively correspond to the first inlet/outlet 71 and the second inlet/outlet 72 are also arranged on the side wall of the right end of the valve core 60, and when the valve core 60 is rotated to enable the first large-flow injection outlet 621 and the second large-flow injection outlet 622 to be respectively communicated with the first inlet/outlet 71 and the second inlet/outlet 72 on the valve body 50, the valve core discharge port 603 enables the discharge port 502 to be communicated with the valve core cavity 601; it can be understood that when the valve core 60 is located at this position, the valve core feed port 602 on the valve core 60 is staggered with the side wall feed port 504 on the valve body 50, i.e. the valve core chamber 601 is not communicated with the feed port 501 on the valve body 50; at the moment, the pump can simultaneously inject color paste into the valve core cavity 601 through the first inlet/outlet 71 and the second inlet/outlet 72, the color paste in the valve core cavity 601 is outwards injected through the valve core discharge hole 603 and the discharge hole 502, and when the valve core is positioned at the position, the reversing valve is in a large-flow injection state, so that the color paste can be rapidly pumped to color mixing equipment at a large flow rate;

the side wall of the right end of the valve core 60 is also provided with a small-flow injection outlet 631 which is staggered with the first return port 611 and the first large-flow injection outlet 621 and corresponds to the first inlet/outlet 71, the side wall of the right end of the valve core 60 is also provided with a low-resistance return port 632 which is staggered with the second return port 612 and the second large-flow injection outlet 622 and is used for communicating the second inlet/outlet 72 and the feed inlet 501, and when the valve core 60 is rotated to enable the small-flow injection outlet 631 to be communicated with the first inlet/outlet 71, the second inlet/outlet 72 can be communicated with the feed inlet 501 through the low-resistance return port 632 and the discharge port 603 of the valve core is communicated with; it can be understood that when the valve core 60 is located at this position, the valve core feed port 602 on the valve core 60 is staggered with the side wall feed port 504 on the valve body 50, i.e. the valve core chamber 601 is not communicated with the feed port 501 on the valve body 50;

at this time, the pump can pump the color paste into the valve core cavity 601 through the first inlet/outlet 71 and the small flow injection outlet 231; the color paste in the pump shell 10 connected with the second inlet/outlet 72 can flow back to the color paste feeding barrel 80 through the second inlet/outlet 72, the low-resistance backflow port 632 and the feeding port 501 with low resistance, when the valve core is positioned at the position, only the color paste in the small pump body 40 communicated with the first inlet/outlet 71 can be pumped to the color mixing device through the reversing valve, the color paste can be injected at a small flow rate, and the reversing valve is in a small flow rate injection state.

In the double-stage flow color paste supply device of the color mixer in the embodiment of the application, the reversing valve is provided with the valve body with the feeding hole and the discharging hole, and the top of the cavity in the valve body is provided with the first inlet and the second inlet which are used for being connected with the pump; the valve core is rotatably arranged in the cavity of the valve body, a plurality of groups of circulation holes corresponding to the first inlet and the second outlet are arranged on the valve core, the reversing valve can have three working states by rotating the valve core, and the reversing valve is matched with a pump with two inlets and two outlets, so that high-flow high-efficiency pouring-out and/or low-flow high-precision pouring-out of color paste are realized, the requirement of high-efficiency pouring-out of the color paste can be met, and the pouring-out quantity of the color paste can be controlled with high precision; the pump and the reversing valve are ingenious in structure, simple in structure and good in reliability.

In an embodiment of the present application, preferably, an annular groove is formed on the right side of the cavity 503 of the valve body 50, a right partition 604 which is matched with the annular groove to divide the cavity 503 is formed at the right end of the valve core 60, the cavity 503 on the left side of the right partition 604 is communicated with the first inlet and outlet 71 and the second inlet and outlet 72, and the cavity 503 on the right side of the right partition 604 is communicated with the feed inlet 501; therefore, the cavity 503 of the valve body 50 is reliably divided into two parts which are not communicated with each other on the left and right by the right partition plate 604 on the valve core 60, and the second inlet/outlet 72 on the left side of the right partition plate 604 can be communicated with the feed inlet 501 on the right side of the right partition plate 604 only through the low-resistance return port 632 on the valve core 60. Preferably, the diameter of the right partition 604 is larger than the diameter of the main body of the valve core 60, so that the left end of the valve core 60 can be inserted into the cavity 503 through the right opening of the cavity 503, and the right partition 604 abuts against the groove on the right side of the cavity 503 to divide the cavity 503 into left and right parts.

In an embodiment of the present application, it is preferable that a first connection line L1, where the center of the first return port 611 and the center of the second return port 612 are on the outer cylindrical surface of the spool 60, is parallel to the central axis L0 of the spool 60, a second connection line L2, where the center of the first large flow rate injection port 621 and the center of the second large flow rate injection port 622 are on the outer cylindrical surface of the spool 60, is parallel to the central axis L0 of the spool 60, and a third connection line L3, where the center of the small flow rate injection port 631 and the center of the low resistance return port 632 are on the outer cylindrical surface of the spool 60, is parallel to the central axis L0 of the spool 60. Preferably, the central angle corresponding to the outer cylindrical surface between the first line L1 and the second line L2 on the valve core 60 is 90 °, and the central angle corresponding to the outer cylindrical surface between the first line L1 and the third line L3 on the valve core 60 is 90 °; it can be understood that the arrangement sequence of the first line L1, the second line L2 and the third line L3 on the outer cylindrical surface of the valve core 20 and the size of the central angle corresponding to the outer cylindrical surface among the first line L1, the second line L2 and the third line L3 can be set as required; in the above embodiment of the application, the second connection line L2, the first connection line L1, and the third connection line L3 are sequentially arranged on the outer cylindrical surface of the valve core, and the central angle corresponding to the outer cylindrical surface between the first connection line L1 and the second connection line L2 and the central angle corresponding to the outer cylindrical surface between the first connection line L1 and the third connection line L3 are both 90 °, and this kind of design can simplify the structures of the through holes on the valve body and the valve core, so that the structure of the reversing valve is better and simpler, and the control is better and more convenient.

In one embodiment of the present application, preferably, the front sidewall 506 and the rear sidewall 507 of the left end of the cavity 503 of the valve body 50 are respectively provided with a sidewall feed opening 504, and the two sidewall feed openings 504 are symmetrically arranged about the central axis of the cavity 503 of the valve body 50; the side wall of the left end of the valve core 60 is further provided with two valve core feed inlets 602 corresponding to the side wall feed inlets 504, the two valve core feed inlets 602 are located on a second connecting line L2 and a third connecting line L3, the two side wall feed inlets 504 can be simultaneously communicated with the valve core cavity 601 through one valve core feed inlet 602, the two valve core feed inlets 602 can be respectively communicated with the discharge outlet 502 on the valve body 50 when rotating along with the valve core 60, namely the two valve core feed inlets 602 on the valve core are also the valve core discharge outlets 603 at the same time, so that the structure of the valve core can be simplified, and the reversing valve is simple in structure and convenient to control. Preferably, the bore diameter of the spool feed opening 602 located on the third line L3 is larger than the bore diameter of the spool feed opening 602 located on the second line L2, since the spool feed opening 602 can be used as the spool discharge opening 603, that is, the bore diameter of the spool discharge opening 603 located on the third line L3 is larger than the bore diameter of the spool discharge opening 603 located on the second line L2; when the valve core 60 is in a large-flow injection state, the valve core discharge hole 603 with a larger aperture is communicated with the discharge hole 502 on the valve body 50, so that color paste can be pumped to the outside of the reversing valve at a low resistance and a large flow rate; when the valve core 60 is in a low-flow pouring state, the valve core discharge hole 603 with a smaller aperture is communicated with the discharge hole 502 on the valve body 50, and color paste can be pumped to the outside of the reversing valve with large resistance and low flow, so that the pumping requirements of different flow in the color paste pumping process when the valve core is in different states can be met.

In an embodiment of the present application, preferably, as shown in fig. 5, the discharge port 502 on the valve body 50 is a reducing through hole, and the aperture of one end of the discharge port 502 communicating with the cavity 503 in the valve body 50 is smaller than the aperture of the other end of the discharge port 502 located on the outer surface of the valve body 50, thereby reducing the resistance of the discharge of the color paste, and preferably, the longitudinal section of the discharge port 502 is arc-shaped.

In an embodiment of the present application, preferably, the left end of the valve core 60 is further provided with a detachable valve core plug 91 and a valve core end cap 92, and the valve core plug 90 is used for plugging the left end of the valve core 60, and by designing the valve core end cap, the valve core plug and the valve core as separate structures, the manufacturing of the individual components and the assembly of the reversing valve can be facilitated.

Preferably, the left end of the valve core 60 is further provided with a shift lever 93 radially penetrating through the valve core 60, the valve core plug 91 and the valve core end cover 92, the shift lever 93 can drive the valve core 60 to rotate in the cavity of the valve body 50, in production application, the shift lever 93 can be controlled by control elements such as a stepping motor and the like to complete automatic control of rotation of the valve core, and a design and control of a driving device for rotation of the valve core can be designed as required by those skilled in the art, and will not be described herein again.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A double-stage flow color paste supply device of a color mixer comprises a pump and a reversing valve, wherein the pump comprises a pump shell and a piston rod, a piston capable of reciprocating along with the piston rod in the pump shell is fixed on the piston rod, the reversing valve comprises a valve body and a valve core, and a feed inlet connected with a color paste feed barrel and a discharge outlet connected with a color mixing device are arranged on the valve body; an elastic clamping jaw is fixed between the lower end of the pump shell and the valve body connecting cylinder, the elastic clamping jaw is used for positioning a small pump body in the valve body connecting cylinder so that the lower end face of the small pump body is connected with the lower end face of the valve body connecting cylinder in a sealing mode, the outer diameter of the small piston is connected with the inner wall of the small pump body in a sealing mode and can reciprocate in the small pump body, and the small piston can drive the small pump body to be separated from the elastic clamping jaw to move upwards when moving upwards for a certain height along with the piston rod; the bottom of the valve body connecting cylinder is also provided with a first inlet and a second inlet corresponding to the inner cavity of the small pump body and the inner cavity of the pump shell; the valve body is provided with a cylindrical cavity penetrating through the left side and the right side of the valve body, the valve body connecting cylinder can be communicated with the cavity through the first inlet and the second inlet, the feed port is positioned at the right end of the cavity, the side wall of the left end of the cavity is provided with a side wall feed port, the side wall feed port is communicated with the feed port through an external pipeline positioned outside the cavity on the valve body, and the bottom of the left end of the cavity is provided with the discharge port; still install in the cavity and be cylindricly and can the cavity internal rotation the case, the case right-hand member seals just the right-hand member of case will the left and right two parts of mutual isolation are cut apart into to the cavity, the inside of case is equipped with the case chamber, be equipped with on the lateral wall of case and be used for the intercommunication the lateral wall feed inlet with the case feed inlet in case chamber, be used for the intercommunication the discharge gate with the case discharge gate in case chamber and multiunit respectively with first import and export the second import and export the correspondence can change when the case rotates first import and export the second import and export with the through-flow hole of case chamber intercommunication state.

2. The dual-stage flow mill base supply of claim 1, characterized in that: still be equipped with in the valve body connecting cylinder to the guide positioning ring that the inner chamber of pump case extends, the lower extreme of the little pump body can stretch into in the guide positioning ring, the outer wall of the little pump body with the inner wall sealing connection of guide positioning ring, first import and export with the inner chamber intercommunication of guide positioning ring, the second import and export with the outer wall of guide positioning ring, the cavity intercommunication between the inner wall of valve body connecting cylinder.

3. The dual-stage flow mill base supply of claim 2, characterized in that: and a sealing ring is fixed on the outer wall of the lower end of the small pump body and used for plugging a gap between the outer wall of the small pump body and the inner wall of the guide positioning ring.

4. The dual-stage flow mill base supply of claim 3, characterized in that: the outer wall of the small pump body is provided with a retaining ring, the retaining ring is provided with a clamping groove matched with the elastic clamping jaw, and the elastic clamping jaw is matched with the clamping groove to fix the small pump body at the lower end of the valve body connecting cylinder and enable the lower end of the small pump body to be abutted against the lower end face of the valve body connecting cylinder; when the small piston moves upwards for a certain height along with the piston rod, the small piston can drive the small pump body to move upwards so that the elastic clamping jaws deform outwards and are separated from the clamping grooves.

5. The dual-stage flow mill base supply of claim 1, characterized in that: a first return port corresponding to the first inlet and outlet and a second return port corresponding to the second inlet and outlet are arranged on the side wall of the right end of the valve core, and when the first return port and the second return port on the valve core are respectively communicated with the first inlet and outlet and the second inlet and outlet on the valve body, the side wall feed port is communicated with the valve core cavity through the valve core feed port; a first large-flow injection outlet and a second large-flow injection outlet which are staggered with the first return port and the second return port and respectively correspond to the first inlet and the second outlet are also arranged on the side wall at the right end of the valve core, and when the valve core is rotated to enable the first large-flow injection outlet and the second large-flow injection outlet to be respectively communicated with the first inlet and the second outlet on the valve body, the valve core discharge port communicates the discharge port with the valve core cavity; the side wall of the right end of the valve core is also provided with a small-flow injection port which is staggered with the first backflow port and the first large-flow injection port and corresponds to the first inlet and the first outlet, the side wall of the right end of the valve core is also provided with a low-resistance backflow port which is staggered with the second backflow port and the second large-flow injection port and is used for communicating the second inlet and the second outlet and the feed inlet, and when the valve core is rotated to enable the small-flow injection port to be communicated with the first inlet and the second outlet to be communicated with the feed inlet through the low-resistance backflow port and the discharge port of the valve core to be communicated with the valve core cavity.

6. The dual-stage flow mill base supply of claim 1, characterized in that: the right side of the cavity of valve body is equipped with the annular, the right-hand member of case be equipped with the annular cooperation is in order to cut apart the right baffle of cavity, the left cavity of right baffle with first import and export the second import and export the intercommunication, the cavity on baffle right side with the feed inlet intercommunication.

7. The dual-stage flow mill base supply of claim 5, characterized in that: a first connecting line L1 of the centers of the first and second return ports on the outer cylindrical surface of the valve core is parallel to a central axis L0 of the valve core, a second connecting line L2 of the centers of the first and second large flow injection ports on the outer cylindrical surface of the valve core is parallel to a central axis L0 of the valve core, and a third connecting line L3 of the centers of the small flow injection port and the low resistance return port on the outer cylindrical surface of the valve core is parallel to a central axis L0 of the valve core; the central angle corresponding to the outer cylindrical surface between the first connecting line and the second connecting line on the valve core is 90 degrees, and the central angle corresponding to the outer cylindrical surface between the first connecting line and the third connecting line on the valve core is 90 degrees.

8. The dual-stage flow mill base supply of claim 7, characterized in that: the front side wall and the rear side wall of the left end of the cavity of the valve body are respectively provided with the side wall feeding holes, and the two side wall feeding holes are symmetrically arranged around the central axis of the cavity of the valve body; the side wall of the left end of the valve core is also provided with two valve core feeding holes, the two valve core feeding holes are respectively positioned on the second connecting line and the third connecting line, the two side wall feeding holes can be respectively communicated with the valve core cavity through the valve core feeding holes, and the valve core feeding holes can be communicated with the discharging holes when rotating along with the valve core.

9. The dual-stage flow mill base supply of claim 8, characterized in that: the aperture of the valve core feed port on the third connecting line is larger than that of the valve core feed port on the second connecting line.

10. The dual-stage flow mill base supply of claim 1, characterized in that: the left end of the valve core is also provided with a detachable valve core plug and a valve core end cover, and the valve core plug is used for plugging the left end of the valve core; and the left end of the valve core is also provided with a deflector rod which radially penetrates through the valve core, the valve core plug and the valve core end cover, and the deflector rod can drive the valve core to rotate in the cavity of the valve body.