CN214132517U

CN214132517U - Two-component trace screw dispensing valve

Info

Publication number: CN214132517U
Application number: CN202022725126.9U
Authority: CN
Inventors: 李涛
Original assignee: Shenzhen Micro Point Fluid Technology Co ltd
Current assignee: Shenzhen Micro Point Fluid Technology Co ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-09-07
Anticipated expiration: 2030-11-23

Abstract

The technical scheme of the utility model discloses a two-component micro screw dispensing valve, which comprises a micro pump, a base, a valve body and a glue mixing needle assembly; the two groups of micro pumps are distributed in the base in parallel and are respectively used for conveying the media of the two pressure barrels to the valve body; the valve body is provided with a first medium channel and a second medium channel which are not communicated, and one ends of the first medium channel and the second medium channel are respectively communicated with the two groups of micro pumps so as to send the media of the two pressure barrels to the glue mixing needle assembly; the glue mixing needle assembly is used for mixing media of two pressure barrels and comprises an outer barrel and an inner barrel, the inner barrel is arranged in the outer barrel and forms a cavity allowing the mixed media to pass through, the outer barrel is communicated with the other end of a first medium channel, and the inner barrel is communicated with the other end of a second medium channel. Placing the glue mixing cavity outside the glue mixing needle to prevent the mixed medium from solidifying inside the glue dispensing valve; the dispensing valve is not required to be frequently disassembled when the cleaning is carried out.

Description

Two-component trace screw dispensing valve

Technical Field

The utility model belongs to the technical field of the dispensing valve technique and specifically relates to a two ingredient trace screw rod dispensing valve is related to.

Background

The double-component glue dispensing valve is a mixing device for mixing two liquids into hardened glue, wherein one liquid is the original glue, the other liquid is the hardening agent, and the two liquids can be hardened after being mixed. The existing two-component dispensing valve has more two-component dispensing valves in the market, but the existing two-component dispensing valve also has the defects, the glue mixing cavity of the two-component dispensing valve in the prior art is generally arranged in the dispensing valve, and the mixed two-component glue has the characteristic of quick solidification, so that the two-component dispensing valve used in some long-time dispensing interval modes or the two-component dispensing valve which is not used for a long time is required to be quickly cleaned; in the prior art, a mixing cavity of the two-component glue is arranged inside the dispensing valve, and the dispensing valve is required to be completely disassembled for convenient operation during each cleaning; some of the better two-component dispensing valves utilize the cavity in the glue outlet nozzle as a mixing cavity, but because the glue mixing cavity is too close to the outlets of the original glue and the hardening agent, the mixed glue can still be solidified near the two-component dispensing valve body, and the cleaning difficulty can also be caused.

Therefore, the above technical problem needs to be solved.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model provides a two ingredient trace screw rod dispensing valve, aim at solve at every turn and wash the problem that the glue after all need dismantling the dispensing valve and preventing to mix solidifies near the dispensing valve body.

In order to solve the technical problem, the utility model provides a basic technical scheme does:

a double-component micro screw dispensing valve comprises a micro pump, a base, a valve body and a glue mixing needle assembly which are distributed from top to bottom.

The micro pumps are distributed in the base in parallel and are respectively used for conveying media of the two pressure barrels to the valve body.

The valve body is provided with a first medium channel and a second medium channel which are not communicated, and one ends of the first medium channel and the second medium channel are respectively communicated with the two groups of micro pumps so as to send the media of the two pressure barrels to the glue mixing needle assembly.

The glue mixing needle assembly is used for fully mixing the media of the two pressure barrels and comprises an outer barrel and an inner barrel, the inner barrel is arranged in the outer barrel and forms a cavity allowing the mixed media to pass through, the outer barrel is communicated with the other end of the first medium channel, and the inner barrel is communicated with the second medium channel.

Further, the micro pump includes a driving unit, a bearing assembly, a screw, a stator, and a micro pump housing; the shell of the micro pump is provided with a medium inlet and a cavity for accommodating a medium; the stator is arranged in the cavity; the bearing assembly is positioned above the micro pump housing for limiting the offset of the screw; the screw rod is provided with a smooth part and a spiral part, the spiral part is arranged inside the stator, and the smooth part is connected with the bearing assembly; the driving unit is positioned above the bearing assembly and connected with the bearing assembly so as to drive the screw to rotate.

Furthermore, a feeding interface is arranged on a medium inlet of the micropump shell.

Furthermore, pressure detection channels communicated with the first medium channel and the second medium channel are respectively formed in two sides of the base, and pressure sensors are respectively arranged on the pressure detection channels and used for detecting the pressure in the channels.

Further, a first port and a second port are arranged at the lower part of the valve body, the second port is arranged in the first port, the outlet end of the first medium channel is arranged in a groove between the first port and the second port, and the outlet end of the second medium channel is enclosed in the second port; the first port is used for being communicated with the outer barrel, and the second port is used for being communicated with the inner barrel.

Further, the first port and the second port are provided with thread structures.

Furthermore, the surface of the inner barrel is provided with a hole for allowing the medium to flow out, so that the media of the two pressure barrels are fully mixed in the glue mixing needle assembly.

Furthermore, a spiral structure is arranged on the inner wall of one end of the outer cylinder close to the glue outlet, so that the mixed medium is further stirred in the glue mixing needle assembly.

Further, a sealing ring is arranged between the base and the valve body and used for preventing the media from seeping out.

The utility model has the advantages that:

the technical scheme of the utility model provides a two-component trace screw dispensing valve, which comprises a micro pump, a base, a valve body and a glue mixing needle assembly; the two groups of micro pumps are distributed in the base in parallel and are respectively used for conveying the media of the two pressure barrels to the valve body; the valve body is provided with a first medium channel and a second medium channel which are not communicated, and one ends of the first medium channel and the second medium channel are respectively communicated with the two groups of micro pumps so as to send the media of the two pressure barrels to the glue mixing needle assembly; the glue mixing needle assembly is used for mixing media of two pressure barrels and comprises an outer barrel and an inner barrel, the inner barrel is arranged in the outer barrel and forms a cavity allowing the mixed media to pass through, the outer barrel is communicated with the other end of a first medium channel, and the inner barrel is communicated with the other end of a second medium channel. Placing the glue mixing cavity outside the glue mixing needle to prevent the mixed medium from solidifying inside the glue dispensing valve; the dispensing valve is not required to be frequently disassembled during cleaning.

Drawings

FIG. 1 is a cross-sectional view of a two-component screw dispensing valve;

FIG. 2 is a schematic view of the construction of a micro pump;

FIG. 3 is a schematic view of a two-component screw dispensing valve;

fig. 4 is a partial schematic view of the valve body and the glue mixing needle assembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to fig. 1 to 4, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.

Fig. 1 shows a cross-sectional view of a novel two-component screw dispensing valve. The dispensing valve comprises a micro pump 1, a base 2, a valve body 3 and a glue mixing needle assembly 4 which are distributed from top to bottom; the two groups of micro pumps 1 are distributed in the base 2 in parallel and are respectively used for conveying media of the two pressure barrels to the valve body 3; the valve body 3 is provided with a first medium channel 31 and a second medium channel 32 which are not communicated, one end of the first medium channel 31 and one end of the second medium channel 32 are respectively communicated with the two groups of micro pumps 1, so that the media of the two pressure barrels are sent to the glue mixing needle assembly 4; the glue mixing needle assembly 4 is used for fully mixing the media of the two pressure barrels, and comprises an outer barrel 41 and an inner barrel 42, the inner barrel 42 is arranged in the outer barrel 41 and forms a cavity allowing the mixed media to pass through, the outer barrel 41 is communicated with the other end of the first media channel 31, and the inner barrel 42 is communicated with the second media channel 32.

When the micro pump works, the two groups of micro pumps 1 respectively send the media in the two pressure barrels to the outer barrel 41 and the inner barrel 42 through the first media channel 31 and the second media channel 32 for mixing, and the mixed glue is output from the other end of the glue mixing needle assembly 4.

See fig. 2 for a schematic view of the construction of the micropump 1. The micro pump 1 includes a driving unit 11, a bearing assembly 12, a screw 13, a stator 14, and a micro pump housing 15; the micro pump housing 15 is provided with a medium inlet 15a and a cavity 15b for accommodating a medium; the stator 14 is arranged in the cavity 15b, and medium is allowed to flow into the stator 14; the bearing assembly 12 is located above the micro pump housing 15 for limiting the offset of the screw 13; the screw 13 has a smooth portion and a spiral portion, the spiral portion being disposed inside the stator, the smooth portion being connected to the bearing assembly 12; the driving unit 11 is located above the bearing assembly 12 and connected with the bearing assembly 12 for driving the screw 13 to rotate.

Specifically, the medium in the pressure barrel enters the cavity 15b through the medium inlet 15a, the medium flows into the cavity formed by the stator 14 and the screw 13 after filling the cavity 15b, and when the dispensing valve is in a non-working state, the spiral part of the screw 13 can block the medium in the stator 14 from entering the valve body 3, so that the dispensing valve is prevented from leaking; when the dispensing valve is in an operating state, the screw 13 rotates, so that the medium in the stator 14 is sent out to the glue mixing needle assembly 4 under the extrusion of the screw. Meanwhile, the back suction function of the medium can be easily realized through the reverse rotation of the driving unit 11, no dripping is caused, and the cleanness of the medium and the material is ensured.

Referring to fig. 2, a feed connection 16 is provided at the medium inlet 15a of the micropump housing 15. It is more convenient to send the medium to the micro pump 1.

Referring to fig. 3, pressure detection channels 2a communicated with the first medium channel 31 and the second medium channel 32 are respectively opened at two sides of the base 2, a pressure stabilizing pool is arranged on the pressure detection channels 2a, and pressure sensors 5 are respectively arranged on the pressure detection channels 2a for detecting the pressure in the channels.

The pressure stabilizing pool is larger than the pressure detection channel 2a, can temporarily store media, and avoids flowing media from applying pressure to the pressure value in the channel when the micropump 1 runs so as to ensure the accuracy of the pressure sensor 5.

Specifically, in the conventional dispensing valve, due to the fact that no pressure detection device is arranged, when the situation of material blockage occurs, the dispensing valve cannot be fed back, so that the dispensing valve always continues to pressurize or continuously rotates the screw rod, the pressure of the dispensing valve is continuously increased, when the pressure is larger than a certain value, a medium leaks out of a sealing position of the dispensing valve, or the screw rod continues to work under high pressure, and the abrasion of the screw rod is increased. Therefore, in order to prevent the above situation, the present invention provides that pressure detection channels 2a communicating with the first medium channel 31 and the second medium channel 32 are respectively opened at both sides of the base 2, and pressure sensors 5 are respectively provided on the pressure detection channels 2a, and when the pressure sensors 5 detect that the pressure of the medium is too large, the rotation of the driving unit 11 is immediately stopped.

As shown in fig. 3. The lower part of the valve body 3 is provided with a first port 33 and a second port 34, the second port 34 is provided in the first port 33, and the outlet end 31a of the first medium passage 31 is provided in a groove between the first port 33 and the second port 34, and the outlet end 32a of the second medium passage 32 is enclosed in the second port 34; the first port 33 is adapted to communicate with the outer cylinder 41, and the second port 34 is adapted to communicate with the inner cylinder 42.

Specifically, the arrangement of the second port 34 and the inner cylinder 42 extends the glue mixing cavity for different media to the outlet end of the inner cylinder 42, so as to prevent the mixed media from being solidified on the dispensing valve body.

Fig. 4 is a schematic structural view of the valve body 3. The first port 33 and the second port 34 are provided with thread structures for connecting with the glue mixing needle assembly 4.

Referring to fig. 4, a structural schematic diagram of the glue mixing needle assembly is shown. The inner cylinder 42 is provided with holes 42a on the surface thereof for allowing the medium to flow out, so that the media of the two pressure barrels are sufficiently mixed in the glue mixing needle assembly 4.

A spiral structure 41a is arranged on the inner wall of the outer cylinder 41 near one end of the glue outlet, so that the mixed medium is further stirred in the glue mixing needle assembly 4.

Specifically, the mixed medium is sheared by the spiral structure and is in a spiral structure, so that the mixed medium is further fully mixed, and the solidification performance is further improved.

Fig. 1 shows a cross-sectional view of a novel two-component screw dispensing valve. A sealing ring 6 is arranged between the base 2 and the valve body 3 for preventing the media from seeping out.

Specifically, the medium in the pressure barrel enters the cavity formed by the cavity 15b, the stator 14 and the screw 13 through the medium inlet 15a, and when the dispensing valve is in a non-working state, the spiral part of the screw 13 can block the medium in the stator 14 from entering the valve body 3, so that the dispensing valve is prevented from leaking; when the dispensing valve is in an operating state, the screw 13 rotates to enable the medium in the stator 14 to be sent to the glue mixing needle assembly 4 from the medium channel of the valve body 3 under the extrusion of the screw for mixing and finally coating the mixed medium on the material, in order to prevent the medium from leaking out of a sealing area due to the excessive medium pressure, a pressure sensor 5 is arranged on the dispensing valve, and the operation of the dispensing valve is stopped when the excessive medium pressure is detected. The dispensing mode can be realized through inching operation of the screw 13, uninterrupted dispensing can be realized through continuous operation of the screw 13, meanwhile, the back suction function of the medium can be easily realized through the reverse rotation of the driving unit 11, no dripping leakage exists, and the cleanness of the medium and the material is ensured.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A two-component trace screw dispensing valve is characterized in that: the dispensing valve comprises a micro pump (1), a base (2), a valve body (3) and a glue mixing needle assembly (4) which are distributed from top to bottom;

the micro pumps (1) are divided into two groups and distributed in the base (2) in parallel, and are respectively used for conveying media of the two pressure barrels to the valve body (3);

the valve body (3) is provided with a first medium channel (31) and a second medium channel (32) which are not communicated, one end of the first medium channel (31) and one end of the second medium channel (32) are respectively communicated with the two groups of micro pumps (1) so as to send the media of the two pressure barrels to the glue mixing needle assembly (4);

the glue mixing needle assembly (4) is used for fully mixing the media of the two pressure barrels and comprises an outer barrel (41) and an inner barrel (42), the inner barrel (42) is arranged in the outer barrel (41) and forms a cavity allowing the mixed media to pass through, the outer barrel (41) is communicated with the other end of the first media channel (31), and the inner barrel (42) is communicated with the second media channel (32).

2. The two-component micro-screw dispensing valve of claim 1, wherein: the micro pump (1) comprises a driving unit (11), a bearing assembly (12), a screw (13), a stator (14) and a micro pump shell (15); the micropump housing (15) is provided with a medium inlet (15a) and a cavity (15b) for accommodating a medium; the stator (14) is placed in the cavity (15 b); the bearing assembly (12) is located above the micro pump housing (15) for defining the offset of the screw (13); the screw (13) has a smooth portion and a spiral portion, the spiral portion is arranged inside the stator, and the smooth portion is connected with the bearing assembly (12); the driving unit (11) is positioned above the bearing assembly (12) and is connected with the bearing assembly (12) for driving the screw rod (13) to rotate.

3. The two-component micro-screw dispensing valve of claim 2, wherein: a feed connection (16) is provided on a medium inlet (15a) of the micropump housing (15).

4. The two-component micro-screw dispensing valve of claim 1, wherein: pressure detection channels (2a) communicated with the first medium channel (31) and the second medium channel (32) are respectively formed in two sides of the base (2), and pressure sensors (5) are respectively arranged on the pressure detection channels (2a) and used for detecting the pressure in the channels.

5. The two-component micro-screw dispensing valve of claim 1, wherein: a lower portion of the valve body (3) is provided with a first port (33) and a second port (34), the second port (34) is provided in the first port (33), and an outlet end (31a) of the first medium passage (31) is provided in a groove between the first port (33) and the second port (34), and an outlet end (32a) of the second medium passage (32) of the valve body (3) is enclosed in the second port (34); the first port (33) is for communication with the outer barrel (41), and the second port (34) is for communication with the inner barrel (42).

6. The two-component micro-screw dispensing valve of claim 5, wherein: the first port (33) and the second port (34) are provided with a threaded structure.

7. The two-component micro-screw dispensing valve of claim 1, wherein: the surface of the inner barrel (42) is provided with holes for allowing the medium to flow out, so that the media of the two pressure barrels are fully mixed in the glue mixing needle assembly (4).

8. The two-component micro-screw dispensing valve of claim 1, wherein: the inner wall of one end of the outer cylinder (41) close to the glue outlet is provided with a spiral structure, so that the mixed medium is further stirred in the glue mixing needle assembly (4).

9. The two-component micro-screw dispensing valve of claim 1, wherein: and a sealing ring (6) is arranged between the base (2) and the valve body (3) and is used for preventing the seepage of a medium.