A liquid dispenser

Abstract

The present invention relates to a liquid distributor, in particular to a liquid distributor for colorants or tinting slurries of coatings, comprising a valve, wherein the valve comprises a valve housing, a valve core is rotatably arranged in the valve housing, the valve housing comprises a feed channel and a distribution opening, a secondary distribution channel and at least one main channel are arranged in the valve core, and a maximum angle α formed between radial sections of the main channel and the secondary distribution channel is such that: ① when the radial section of the secondary distribution channel is aligned with the distribution opening, at least one main channel is in a connected state with the feed channel; ② when one of the radial sections of the main channel is aligned with the distribution opening, the other main channels and the secondary distribution channels are blocked by the inner wall of the valve housing; ③ when the radial section of the secondary distribution channel cooperates with the feed channel, the main channel is staggered from the distribution opening, in which case at least one main channel is in a connected state with the feed channel, and the other main channels are blocked by the inner wall of the valve housing; or all the main channels are blocked by the inner wall of the valve housing.

Description

Technical Field

[0001] The present invention relates to a liquid dispenser, in particular a liquid dispenser for colorants or tinting pastes for paints. Such a dispenser generally comprises a pump and a valve, the valve allowing the pump to draw a certain amount of colorant from a container and dispense it into, for example, a container (such as a paint can). Background Art

[0002] The colorant must be dosed and metered very accurately in order to produce a coating that matches the desired color. To this end, some dispensers have pumps that can dispense larger and smaller volumes.

[0003] CN202380025606.8 proposes a liquid dispenser, see Figure 1 , including a valve 11, the valve 11 includes a valve housing 13, a valve core 14 is rotatably arranged in the valve housing 13, the valve housing 13 includes an inlet channel 15 connected to the material tank 3 at the top and a distribution opening 16 for discharging at the bottom, wherein the valve core 14 is respectively provided with a finer secondary distribution channel 48, the secondary distribution channel 48 is used for small volume discharge, and a coarser main channel 42, the main channel 42 is used for suction and large volume discharge, and also includes a return channel 51 symmetrically arranged on the valve core 14 relative to the secondary distribution channel 48, one end of these channels is a radial section, the radial section is connected to the outer surface of the valve core 14 for matching the inlet channel 15 or the distribution opening 16, and the other end is an axial section, the axial section is connected to the piston rod (see the patent document), and the piston is extended and retracted to perform the work of sucking or feeding.

[0004] There is a problem in this structure, as shown in the figure: when the main channel 42 cooperates with the feed channel 15, the return channel 51 and the auxiliary distribution channel 48 are both blocked. At this time, the piston rod can normally suck the slurry. When the auxiliary distribution channel 48 cooperates with the distribution opening 16 to discharge a small volume, the return channel 51 plays a role of returning the material, so that the excess slurry returns to the material tank 3; when the main channel 42 cooperates with the feed channel 15, it can return the material independently, but when the auxiliary distribution channel 48 cooperates with the feed channel 15, the return channel 51 cooperates with the distribution opening 16. At this time, the auxiliary distribution channel 48 cannot return the material independently (because it will discharge from the return channel 51), which leads to easy accumulation of material in the feed channel 15. Because the auxiliary distribution channel 48 is thinner, and because the colorant or color slurry is easy to precipitate, there will be a part of the color slurry remaining in the auxiliary distribution channel due to the lack of reflux. These color slurries are in a static state and are prone to solidification and blockage. Summary of the invention

[0005] In order to solve the problem that the secondary distribution channel in the above-mentioned patent technical solution cannot flow back, thereby causing the secondary distribution channel to be blocked by color paste precipitation with a high probability, causing failure, and the problem that the channel for absorbing color paste is thin and the resistance to absorbing color paste is large, the present invention provides a liquid dispenser.

[0006] The object of the present invention is achieved in the following manner: a liquid distributor comprises a valve 11, wherein the valve 11 comprises a valve housing 13, a valve core 14 is rotatably arranged in the valve housing 13, the valve housing 13 comprises a feed channel and a distribution opening 16, a secondary distribution channel 48 and at least one main channel 42 are arranged in the valve core 14, and a maximum angle α formed between radial sections of the main channel 42 and radial sections of the secondary distribution channel 48; such that: ① When the radial section of the secondary distribution channel 48 is aligned with the distribution opening 16, at least one main channel 42 is in communication with the feed channel; ② One of the main channels 42 is aligned with the distribution opening 16 in radial direction, while the other main channels 42 and the auxiliary distribution channels 48 are blocked by the inner wall of the valve housing 13; ③ When the radial section of the secondary distribution channel 48 cooperates with the feed channel, the main channel 42 is offset from the distribution opening 16. In this state, at least one main channel 42 is connected to the feed channel, and other main channels 42 are blocked by the inner wall of the valve housing 13; or all main channels 42 are blocked by the inner wall of the valve housing 13.

[0007] As a solution, the feed channel is a feed extension channel 100, and the cross section of the feed extension channel 100 is strip-shaped.

[0008] Furthermore, the center line of the feed extension channel 100 coincides with or deviates from the center line of the valve core 14 .

[0009] Furthermore, the feed extension channel 100 is in an arc shape at the valve core 14, and the center angle of the arc line of the arc shape is 45 degrees to 135 degrees.

[0010] As a solution, the feed channel includes a main feed channel 15 and at least one second feed channel 200 arranged in parallel with the main feed channel 15 .

[0011] Furthermore, there are two main channels 42, and the two main channels 42 are in communication with the feed channel. When sucking materials, the secondary distribution channel 48 is blocked by the inner wall of the valve housing 13 or the secondary distribution channel 48 is also in communication with the feed channel.

[0012] Furthermore, the angle α is 45 degrees to 135 degrees.

[0013] Compared with the prior art, the present invention has developed and improved the coordination relationship between the secondary distribution channel 48, the main channel 42, the feed channel and the distribution opening 16, so that on the basis of satisfying the normal suction and discharge of materials in the original scheme, the secondary distribution channel 48 has the function of independently cooperating with the feed channel to return materials. At this time, the main channel 42 is not in the discharge state when returning materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the valve body structure of the prior art; Figure 2 is a schematic diagram of the valve body structure of Scheme 1, wherein the secondary distribution channel corresponds to the distribution opening; Figure 3 is a schematic diagram of the valve body structure of Scheme 1, wherein the main channel corresponds to the distribution opening; Figure 4 It is a structural schematic diagram of another structure of the valve body inlet extension channel of scheme one; Figure 5 This is a schematic diagram of another main channel structure of Scheme 1; Figure 6 This is a three-dimensional diagram of another structure of Scheme 1; Figure 7 This is a schematic diagram of one of the structures of Scheme 2, and one of the main channels cooperates with the main inlet channel to suck the material (cross-section along the radial direction of the valve core); Figure 8 This is a schematic diagram of one of the structures of Scheme 2, and one of the main channels cooperates with the main inlet channel to suck the material (section along the axial direction of the valve core); Fig. 9 It is a schematic diagram of one of the structures of Scheme 2, and one of the main channels cooperates with the distribution opening to discharge the material (cross-section along the radial direction of the valve core); Fig.10 It is a schematic diagram of one of the structures of Scheme 2, and one of the main channels cooperates with the distribution opening to discharge the material (section along the axial direction of the valve core); Fig.11 It is a schematic diagram of one of the structures of the second scheme, and the auxiliary distribution channel cooperates with the distribution opening to discharge the material (cross-section along the radial direction of the valve core); Fig.12 It is a schematic diagram of one of the structures of the second scheme, and the auxiliary distribution channel cooperates with the distribution opening to discharge the material (section along the axial direction of the valve core); Fig.13 It is a schematic diagram of one of the structures of the second scheme, and the secondary distribution channel cooperates with the second feed channel for reflux (cross-section along the radial direction of the valve core); Fig.14 It is a schematic diagram of one of the structures of the second scheme, and the secondary distribution channel cooperates with the second feed channel for reflux (section along the axial direction of the valve core); Fig.15 This is a schematic diagram of the second structure of the second scheme, and one of the main channels cooperates with the main inlet channel to absorb the material (cross-section along the radial direction of the valve core); Fig.16 This is a schematic diagram of the second structure of the second scheme, and one of the main channels cooperates with the main inlet channel to absorb the material (section along the axial direction of the valve core); Fig.17 It is a schematic diagram of the second structure of the second scheme, and one of the main channels cooperates with the distribution opening to discharge the material (cross-section along the radial direction of the valve core); Fig.18 This is a schematic diagram of the second structure of the second scheme, and one of the main channels cooperates with the distribution opening to discharge the material (section along the axial direction of the valve core); Fig.19 It is a schematic diagram of the second structure of the second scheme, and the auxiliary distribution channel cooperates with the distribution opening to discharge the material (cross-section along the radial direction of the valve core); Fig. 20 It is a schematic diagram of the second structure of the second scheme, and the auxiliary distribution channel cooperates with the distribution opening to discharge the material (section along the axial direction of the valve core); Fig.21 This is a schematic diagram of the second structure of the second scheme, and the auxiliary distribution channel cooperates with the main inlet channel for reflux (cross-section along the radial direction of the valve core); Fig. 22 This is a schematic diagram of the second structure of the second scheme, and the auxiliary distribution channel cooperates with the main inlet channel for reflux (section along the axial direction of the valve core); Fig.23 This is a schematic diagram of structure three of option two.

[0015] Among them, the feed extension channel 100, the second feed channel 200, the material tank 3, the tubular channel 8, the valve 11, the valve housing 13, the valve core 14, the distribution opening 16, the feed main channel 15, the piston head 30, the auxiliary piston 40, the main channel 42, the fine cavity 46, the auxiliary distribution channel 48, and the main distribution channel 51. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] In the present invention, unless otherwise clearly stipulated and limited, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0018] It should be noted that the present invention is improved from CN202380025606.8, and mainly improves the feed channel structure in the valve core 14, and partially improves the secondary distribution channel 48 and the main channel 42. Other parts not mentioned do not involve changes unless specifically mentioned, and do not affect the matching relationship between the components. The component numbers in the embodiments follow the records in CN202380025606.8, and only some names are changed.

[0019] As seen Figure 1 , which is the structure in CN202380025606.8, including a valve 11, the valve 11 includes a valve housing 13, a valve core 14 is rotatably arranged in the valve housing 13, the valve housing 13 includes an inlet channel 15 connected to the material tank 3 at the top and a distribution opening 16 for discharging at the bottom, wherein the valve core 14 is respectively provided with a finer secondary distribution channel 48, the secondary distribution channel 48 is used for small volume discharge, and a coarser main channel 42, the main channel 42 is used for suction and large volume discharge, and also includes a return channel 51 symmetrically arranged on the valve core 14 relative to the secondary distribution channel 48, one end of these channels is a radial section, the radial section is connected to the outer surface of the valve core 14 for matching the inlet channel 15 or the distribution opening 16, and the other end is an axial section, the axial section is connected to the piston rod (see the patent document), and the piston is extended and retracted to perform the work of sucking or feeding.

[0020] The present invention is improved: a liquid distributor, comprising a valve 11, the valve 11 comprising a valve housing 13, a valve core 14 rotatably arranged in the valve housing 13, the valve housing 13 comprising a feed channel and a distribution opening 16, a secondary distribution channel 48 and at least one main channel 42 are arranged in the valve core 14, and a maximum angle α formed between the radial sections of the main channel 42 and the radial sections of the secondary distribution channel 48; It should be noted that, unlike the original solution CN202380025606.8, the feed channel 15 is single and can only cooperate with one valve channel; the "feed channel" in the present invention is a high-level concept, and the corresponding structure is set according to specific needs.

[0021] ① When the radial section of the auxiliary distribution channel 48 is aligned with the distribution opening 16, at least one main channel 42 is in communication with the feed channel, and other main channels 42 can be in communication with the feed channel or blocked. At this time, a small volume of material is discharged, and at least one main channel 42 returns the material; ② When the radial section of one of the main channels 42 is aligned with the distribution opening 16, the other main channels 42 and the auxiliary distribution channels 48 are blocked by the inner wall of the valve housing 13, and the large volume discharge is carried out normally; ③ When the radial section of the auxiliary distribution channel 48 cooperates with the feed channel, the main channel 42 is staggered from the distribution opening 16, that is, at this time, the auxiliary distribution channel 48 can return materials independently. In this state, at least one main channel 42 is in a connected state with the feed channel, and the other main channels 42 are blocked by the inner wall of the valve housing 13, that is, they return materials together; or all the main channels 42 are blocked by the inner wall of the valve housing 13, that is, only the auxiliary distribution channel 48 returns materials. Both situations are possible.

[0022] For further information, see Figure 2-6 The feed channel is a feed extension channel 100, and the cross-section of the feed extension channel 100 is a bar. Specifically, it means that the bottom discharge end is widened on the basis of the feed channel 15 of the original plan, so that the formed feed extension channel 100 can cooperate with at least two channels of at least one main channel 42 and the auxiliary distribution channel 48 at the same time.

[0023] Further, the center line of the feed extension channel 100 coincides with or deviates from the center line of the valve core 14. This description means that the feed extension channel 100 can be set away from the center line of the valve core 14 and Figure 2-3 , 5 are located on one side of the valve core 14, that is, compared with the original scheme, the feed channel 15 extends to one side, or is set away from the center line of the valve core 14. Figure 4 Located on both sides of the valve core, that is, compared with the feed channel 15 in the original solution, it extends to both sides, or the center line of the feed extension channel 100 coincides with the center line of the valve core 14, and the two sides of the feed extension channel 100 extend to both sides of the valve core 14 respectively, that is, compared with the feed channel 15 in the original solution, it extends to both sides equally.

[0024] Furthermore, the contact portion between the feed extension channel 100 and the valve core 14 is in an arc shape, which can be Figure 2-5 The arc groove structure in Figure 6 In the overall vertically cut strip groove structure, the central angle of the arc line of the arc shape is 45 degrees to 135 degrees, that is, the angle of the matching area of ​​the feed extension channel 100 and the valve core 14 occupies the outer periphery of the valve core 14 is 45 degrees to 135 degrees or a certain angle range within this range.

[0025] For further information, see Figure 7-23 , another solution is proposed, the feed channel includes a main feed channel 15 and at least one second feed channel 200 arranged in parallel with the main feed channel 15, and the second feed channel 200 is located on one side or both sides of the main feed channel 15: For example Figure 7-14 The second feeding channel 200 is located on the left side of the feeding main channel 15. The main channel 42 and the auxiliary distribution channel 48 are arranged similarly to the original scheme. The working states thereof include: ① Such as Figure 7-8At this time, one of the main channels 42 cooperates with the main feeding channel 15 to absorb the material, and the other main channels 42 and the auxiliary distribution channel 48 are blocked; ② If Figure 9-10 At this time, one of the main channels 42 cooperates with the distribution opening 16 to discharge the material, the other main channels 42 and the auxiliary distribution channel 48 are blocked, the auxiliary piston 40 does not cooperate with the axial section of the auxiliary distribution channel 48, and the piston head 30 drives the material to be discharged; ③If Figure 11-12 At this time, the secondary distribution channel 48 cooperates with the distribution opening 16 to discharge, one of the main channels 42 cooperates with the main inlet channel 15 for reflux, the secondary piston 40 cooperates with the axial section of the secondary distribution channel 48, and the piston head 30 cooperates with one of the main channels 42 for reflux; ④ Such as Figure 13-14 At this time, the auxiliary distribution channel 48 cooperates with the second feed channel 200 to reflux, the other main channels 42 are blocked, and the auxiliary piston 40 cooperates with the axial section of the auxiliary distribution channel 48.

[0026] For example Figure 15-22 The second feeding channel 200 is located on the left side of the feeding main channel 15, and the main channel 42 and the auxiliary distribution channel 48 are set to change the angle, and the working state includes: ① Such as Figure 15-16 At this time, one of the main channels 42 cooperates with the main feeding channel 15 to absorb the material, and the other main channels 42 and the auxiliary distribution channel 48 are blocked; ② If Figure 17-18 At this time, one of the main channels 42 cooperates with the distribution opening 16 to discharge the material, the other main channels 42 and the auxiliary distribution channel 48 are blocked, the auxiliary piston 40 does not cooperate with the axial section of the auxiliary distribution channel 48, and the piston head 30 drives the material to be discharged; ③If Figure 19-20 At this time, the secondary distribution channel 48 cooperates with the distribution opening 16 to discharge, one of the main channels 42 cooperates with the second feed channel 200 for reflux, the secondary piston 40 cooperates with the axial section of the secondary distribution channel 48, and the piston head 30 cooperates with one of the main channels 42 for reflux; ④ Such as Figure 21-22 At this time, the auxiliary distribution channel 48 cooperates with the main feed channel 15 to reflux, the other main channels 42 are blocked, and the auxiliary piston 40 cooperates with the axial section of the auxiliary distribution channel 48.

[0027] Fig.23 The structure in Figure 15-22 For symmetrical design, of course, it is not limited to the above structure. The second feed channel 200 is not limited to one, and can be multiple and located on the same side or both sides of the main feed channel 15. The second feed channel 200 is the same as the main feed channel 15 in that one end is connected to the material tank 3, and the other end is connected to the surface of the valve core 14. A sealing ring that matches the second feed channel 200 can be arranged in the valve housing 13.

[0028] Furthermore, in order to solve another technical problem existing in the prior art mentioned above: in fact, the main channel 42 itself is also relatively thin, which makes the efficiency of sucking slurry from the feed channel 15 relatively low, so an improvement is made to make the main channel 42 preferably two, and the two main channels 42 are in a connected state with the feed extension channel 100. When sucking, the auxiliary distribution channel 48 is blocked by the inner wall of the valve housing 13 or the auxiliary distribution channel 48 is also in a connected state with the feed extension channel 100, that is, in the optimal state, as shown in FIG. Figure 5 As shown, the two main channels 42 and the auxiliary distribution channel 48 both play a role in sucking materials, thereby increasing the suction efficiency.

[0029] Furthermore, the angle α is 45 degrees to 135 degrees.

[0030] Furthermore, the valve housing 13 is connected to the material tank 3, a tubular channel 8 is arranged on the side of the material tank 3, the tubular channel 8 is fixedly connected to the valve housing 13, and the tubular channel 8 is connected to the feed channel 15. This structure follows CN202380025606.8.

[0031] The connection structure between the valve 11 and the piston rod pump follows the description in CN202380025606.8.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, which should also be regarded as the scope of protection of the present invention.

Claims

1. A liquid distributor, comprising a valve (11), the valve (11) comprising a valve housing (13), a valve core (14) rotatably arranged in the valve housing (13), the valve housing (13) comprising a material inlet channel and a distribution opening (16), characterized in that: The valve core (14) is provided with a secondary distribution channel (48) and at least one main channel (42), and a maximum angle α formed between a radial section of the main channel (42) and a radial section of the secondary distribution channel (48); such that: ① The radial section of the secondary distribution channel (48) is aligned with the distribution opening (16), and at least one main channel (42) is in communication with the feed channel; ② A radial section of one of the main channels (42) is aligned with the distribution opening (16), while the other main channels (42) and the auxiliary distribution channels (48) are blocked by the inner wall of the valve housing (13); ③ When the radial section of the auxiliary distribution channel (48) cooperates with the feed channel, the main channel (42) is staggered with the distribution opening (16). In this state, at least one main channel (42) is in communication with the feed channel, and the other main channels (42) are blocked by the inner wall of the valve housing (13); or all the main channels (42) are blocked by the inner wall of the valve housing (13).

2. A liquid dispenser according to claim 1, characterized in that: The feed channel is a feed extension channel (100), and the cross section of the feed extension channel (100) is strip-shaped.

3. A liquid dispenser according to claim 2, characterized in that: The center line of the feed extension channel (100) coincides with or deviates from the center line of the valve core (14).

4. A liquid dispenser as claimed in claim 2, characterized in that: The feed extension channel (100) is in an arc shape at the valve core (14), and the center angle of the arc line of the arc shape is 45 degrees to 135 degrees.

5. A liquid dispenser according to claim 1, characterized in that: The feed channel comprises a main feed channel (15) and at least one second feed channel (200) arranged in parallel with the main feed channel (15).

6. A liquid dispenser as claimed in claim 1, characterized in that: There are two main channels (42), and the two main channels (42) are in a connected state with the feed channel. When sucking materials, the secondary distribution channel (48) is blocked by the inner wall of the valve housing (13), or the secondary distribution channel (48) is also in a connected state with the feed channel.

7. A liquid dispenser according to claim 1, characterized in that: The angle α is 45 degrees to 135 degrees.

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