CN213886928U

CN213886928U - Micro-metering valve

Info

Publication number: CN213886928U
Application number: CN202022914736.3U
Authority: CN
Inventors: 李麟; 宋小利; 汪晗
Original assignee: Weihai Rongze Industrial Automation Equipment Co ltd
Current assignee: Weihai Rongze Industrial Automation Equipment Co ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-08-06
Anticipated expiration: 2030-12-07

Abstract

The utility model provides a micro-metering valve, which is provided with an upper valve body and a lower valve body, wherein the upper valve body and the lower valve body are fixedly connected through bolts, the upper valve body is provided with a first glue inlet channel, the lower valve body is provided with a second glue inlet channel, the first glue inlet channel and the second glue inlet channel are mutually communicated and coaxial, and the radius of the first glue inlet channel is larger than that of the second glue inlet channel; a valve core is arranged in the first glue inlet channel, a coaxial ejection core is arranged at the lower part of the valve core, the radius of the ejection core is smaller than that of the valve core, and the ejection core is matched with the second glue inlet channel; the upper valve body and the lower valve body are also provided with glue outlet channels which are communicated with each other, and the glue outlet channels are communicated with the first glue inlet channels. The utility model discloses utilize the volume difference between case and the top core, realize the trace and advance kind, solved current case and be difficult to process the technical problem that can not realize the trace and advance kind, but wide application in metering valve technical field.

Description

Micro-metering valve

Technical Field

The utility model relates to a metering valve technical field, in particular to microminiature metering valve.

Background

In the field of metering valves, a valve core is pushed out of a valve body to sample, and the sample feeding amount is related to the pushing volume of the valve core. The sampling mode is adopted, the sampling amount is large generally, and the method is not suitable for micro-sampling. Because the sample introduction amount is related to the volume of the valve core, the valve core with a small diameter is needed to realize micro sample introduction during micro sample introduction. However, the valve core with a small diameter is difficult to process, so that the method is not suitable for micro-sampling.

Disclosure of Invention

The utility model aims at solving the defects of the technology and providing a micro metering valve which has simple structure and can realize micro sample injection.

Therefore, the utility model provides a micro-metering valve, which is provided with an upper valve body and a lower valve body, wherein the upper valve body and the lower valve body are fixedly connected through bolts, the upper valve body is provided with a first glue inlet channel, the lower valve body is provided with a second glue inlet channel, the first glue inlet channel and the second glue inlet channel are mutually communicated and coaxial, and the radius of the first glue inlet channel is larger than that of the second glue inlet channel; a valve core is arranged in the first glue inlet channel, a coaxial ejection core is arranged at the lower part of the valve core, the radius of the ejection core is smaller than that of the valve core, and the ejection core is matched with the second glue inlet channel; the upper valve body and the lower valve body are also provided with glue outlet channels which are communicated with each other, and the glue outlet channels are communicated with the first glue inlet channels.

Preferably, a valve head outer sleeve is arranged below the lower valve body and fixedly connected with the lower valve body through a bolt, a through hole is formed in the valve head outer sleeve, a lower one-way valve cavity is arranged in the through hole and fixed with the valve head outer sleeve into a whole through a valve head nut, a glue outlet is formed in the lower one-way valve cavity and communicated with the glue outlet channel; be equipped with the adjustment silk in going out the jiao kou, adjustment silk and lower check valve cavity spiro union, adjustment silk cover is equipped with the spring, and the top of spring is equipped with the ball sealer, and the ball sealer card is located and is glued between lower port and the spring of passageway, goes out jiao kou and still communicates and be equipped with the syringe needle.

Preferably, a one-way valve sealing gasket is arranged between the lower one-way valve cavity and the lower valve body.

Preferably, a cylinder is arranged above the upper valve body, and a piston of the cylinder is connected with the valve core.

Preferably, a differential head is connected and arranged on a cylinder body of the air cylinder through a differential head seat, a stroke adjusting block is screwed at the lower end of the differential head, a positioning floating rod is fixedly connected and arranged on the periphery of the valve core, the tail end of the stroke adjusting block is arranged below the positioning floating rod, and the stroke adjusting block drives the positioning floating rod to move upwards under the rotating action of the differential head.

Preferably, the peripheries of the valve core and the top core are all sleeved with a flood seal ring.

Preferably, an upper valve body sealing gasket and a lower valve body sealing gasket are arranged between the upper valve body and the lower valve body.

Preferably, the lower valve body is further provided with a glue inlet, and the glue inlet is communicated with the second glue inlet channel.

Preferably, the upper valve body is also provided with an exhaust port.

The utility model provides a microminiature metering valve has following beneficial effect:

the utility model discloses an go up the valve body and seted up first gluey passageway of advancing, lower valve body has been seted up the second and has been advanced gluey passageway, and the radius that first advance gluey passageway is greater than the radius that the passageway was advanced gluey to the second. A valve core is arranged in the first glue inlet channel, a top core is arranged at the lower part of the valve core, the radius of the top core is smaller than that of the valve core, and the top core is matched with the second glue inlet channel. When micro-sampling is needed, the valve core drives the ejection core to move downwards, the ejection core enters the second glue inlet channel to be sealed, glue can only be extruded along the first glue inlet channel, the glue outlet channel and the glue outlet, and micro-sampling and precise control are realized by utilizing the micro-volume difference between the ejection core and the valve core.

The utility model has the advantages of being simple in structure and convenient in operation, need not be very thin with ejector core, case processing, only need utilize between ejector core and the case micro volume difference just can realize the trace and advance the kind, saved a large amount of precision finishing costs for the enterprise.

Drawings

FIG. 1 is a schematic structural view before glue feeding of the present invention;

fig. 2 is a schematic structural diagram of the utility model after glue feeding.

The labels in the figure are: 1. the automatic valve comprises an upper valve body, 11 parts of upper and lower valve body sealing gaskets, 12 parts of a first glue inlet channel, 13 parts of an exhaust port, 2 parts of a lower valve body, 21 parts of a second glue inlet channel, 22 parts of a glue inlet, 3 parts of a valve core, 31 parts of a positioning floating rod, 32 parts of a flood seal ring, 4 parts of a top core, 5 parts of a glue outlet channel, 6 parts of a valve head outer sleeve, 61 parts of a lower one-way valve cavity, 611 parts of the glue outlet, 612 parts of an adjusting screw, 613 parts of a spring, 614 parts of a sealing ball, 615 parts of a needle head, 616 parts of a one-way valve sealing gasket, 7 parts of a valve head nut, 8 parts of an air cylinder, 9 parts of a differential head, 91 parts of a differential head seat and 92 parts of a stroke adjusting block.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments to assist understanding of the invention. The method used in the utility model is a conventional method if no special regulation is provided; the raw materials and the apparatus used are, unless otherwise specified, conventional commercially available products.

As shown in fig. 1-2, the utility model provides a micro-metering valve, which is provided with an upper valve body 1 and a lower valve body 2, wherein the upper valve body 1 and the lower valve body 2 are connected by a bolt, an upper valve body sealing gasket 11 and a lower valve body sealing gasket 11 are arranged between the upper valve body 1 and the lower valve body 2, and the upper valve body sealing gasket 11 and the lower valve body sealing gasket 11 play a sealing role to prevent glue from leaking.

The upper valve body 1 is provided with a first glue inlet channel 12, the lower valve body 2 is provided with a second glue inlet channel 21, the first glue inlet channel 12 and the second glue inlet channel 21 are communicated with each other and coaxial, and the radius of the first glue inlet channel 12 is larger than that of the second glue inlet channel 21. A valve core 3 is arranged in the first glue inlet channel 12, a coaxial ejection core 4 is arranged at the lower part of the valve core 3, the radius of the ejection core 4 is smaller than that of the valve core 3, and the ejection core 4 is matched with the second glue inlet channel 21. The upper valve body 1 and the lower valve body 2 are also provided with a glue outlet channel 5 which are communicated with each other, and the glue outlet channel 5 is communicated with the first glue inlet channel 12. The lower valve body 2 is further provided with a glue inlet 22, and the glue inlet 22 is communicated with the second glue inlet channel 21.

Before the micro-sampling, glue is injected into the second glue inlet channel 21 and the first glue inlet channel 12 from the glue inlet 22, the valve core 3 moves downwards during the micro-sampling, when the ejector core 4 enters the second glue inlet channel 21, the ejector core 4 is clamped with the second glue inlet channel 21 in a matching manner, the second glue inlet channel 21 is blocked by the ejector core 4, and the glue can only be extruded from the first glue inlet channel 12 along the glue outlet channel 5. The valve core 3 and the top core 4 continuously move downwards, and since the radius of the top core 4 is smaller than that of the valve core 3, the glue is extruded out along the glue outlet channel 5 by utilizing the micro volume difference of the top core 4 and the valve core 3, so that micro sample introduction is realized.

Further, a valve head outer sleeve 6 is arranged below the lower valve body 2, and the valve head outer sleeve 6 is fixedly connected with the lower valve body 2 through bolts. The valve head outer sleeve 6 is provided with a through hole, a lower one-way valve cavity 61 is arranged in the through hole, the lower one-way valve cavity 61 is fixed with the valve head outer sleeve 6 into a whole through a valve head nut 7, the lower one-way valve cavity 61 is provided with a glue outlet 611, and the glue outlet 611 is communicated with the glue outlet channel 5. An adjusting wire 612 is arranged in the glue outlet 611, the adjusting wire 612 is in threaded connection with the lower end of the lower one-way valve cavity 61, a spring 613 is sleeved on the upper end of the adjusting wire 612, a sealing ball 614 is arranged above the spring 613, the sealing ball 614 is clamped between the lower port of the glue outlet channel 5 and the spring 613, a needle 615 is further communicated with the glue outlet 611, and the needle 615 penetrates out of the lower one-way valve cavity 61 and is pressed, fixed and sealed through a valve head nut 7. A one-way valve sealing gasket 616 is arranged between the lower one-way valve cavity 61 and the lower valve body 2 to prevent glue leakage. When glue is discharged, the glue presses the sealing ball 614, the sealing ball 614 moves downwards to press the spring 613, and the glue flows out from the glue discharging channel 5 along the glue outlet 611 and the needle head 615. When glue needs to be supplemented after one-time glue discharging is finished, the valve core 3 moves upwards, the spring 613 rebounds, and the sealing ball 614 blocks the glue outlet 611 to prevent the glue from being sucked back; if the glue density is too high and the spring 613 rebounds slowly or not, the valve head nut 7 is unscrewed, the adjusting wire 612 is rotated to eject the spring 613, and the sealing ball 614 moves upwards.

Further, a cylinder 8 is arranged above the upper valve body 1, a piston of the cylinder 8 is connected with the valve core 3, and the piston of the cylinder 8 is used for driving the valve core 3 to move downwards to extrude glue. The cylinder body of the cylinder 8 is connected with a differential head 9 through a differential head seat 91, the lower end of the differential head 9 is screwed with a stroke adjusting block 92, the periphery of the valve core 3 is also fixedly connected with a positioning floating rod 31, and the tail end of the stroke adjusting block 92 is arranged below the positioning floating rod 31. Under the rotation action of the differential head 9, the stroke adjusting block 92 can perform vertical accurate displacement control so as to limit the vertical displacement of the positioning floating rod 31, thereby achieving the purposes of accurately controlling the feeding amount of the valve core 3 in the metering chamber and accurately adjusting the single discharge amount.

Further, the periphery of case 3 and top core 4 all is equipped with general seal ring 32, plays sealed effect, prevents that glue from overflowing.

Further, the upper valve body 1 is also provided with an exhaust port 13. When the metering valve works for the first time (namely when glue is fed for the first time), the air floating in the first glue inlet channel 12 is exhausted by the air outlet 13, so that the influence of the air on metering is eliminated, and accurate metering is realized.

The utility model discloses a theory of operation does:

the up-and-down movement of the piston of the cylinder 8 drives the valve core 3 to move up and down to continuously suck the glue, the glue is injected into the second glue inlet channel 21, the first glue inlet channel 12 and the glue outlet channel 5 along the glue inlet 22, after the glue is filled in the whole cavity, the piston of the cylinder 8 drives the valve core 3 to move down, the valve core 3 drives the ejection core 4 to move down, when the ejection core 4 enters the second glue inlet channel 21, the glue can only be extruded along the first glue inlet channel 12, the glue outlet channel 5 and the glue outlet 611, the glue extrudes the sealing ball 614 after reaching the glue outlet 611, the sealing ball 614 moves down, and the glue flows out along the glue outlet 611 and the needle 615. When glue needs to be supplemented after the glue feeding is finished once, the piston of the cylinder 8 drives the valve core 3 to move upwards, the valve core 3 drives the ejecting core 4 to move upwards, the glue outlet 611 of the lower one-way valve cavity 61 is closed due to the suck-back force of the glue, the ejecting core 4 moves out of the second glue feeding channel 21, and glue is injected from the glue inlet 22 and sucked into the second glue feeding channel 21 and the first glue feeding channel 12. In the process, if the spring 613 does not rebound due to the excessive viscosity of the glue, the valve head nut 7 can be removed, and the adjusting wire 612 is rotated to adjust the pre-tightening force of the spring 613.

In the description of the present invention, it should be understood that the terms "left", "right", "upper", "lower", "top", "bottom", "front", "rear", "inner", "outer", "back", "middle", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

However, the above description is only an embodiment of the present invention, and the scope of the present invention should not be limited thereto, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.

Claims

1. A micro-metering valve is provided with an upper valve body and a lower valve body, wherein the upper valve body is fixedly connected with the lower valve body through a bolt; a valve core is arranged in the first glue inlet channel, a coaxial ejection core is arranged at the lower part of the valve core, the radius of the ejection core is smaller than that of the valve core, and the ejection core is matched with the second glue inlet channel; the upper valve body and the lower valve body are further provided with glue outlet channels which are communicated with each other, and the glue outlet channels are communicated with the first glue inlet channels.

2. A micro-metering valve as claimed in claim 1, wherein a valve head outer sleeve is arranged below the lower valve body, the valve head outer sleeve is fixedly connected with the lower valve body through bolts, a through hole is formed in the valve head outer sleeve, a lower one-way valve cavity is arranged in the through hole, the lower one-way valve cavity is fixed with the valve head outer sleeve into a whole through a valve head nut, a glue outlet is formed in the lower one-way valve cavity, and the glue outlet is communicated with the glue outlet channel; the glue outlet is internally provided with an adjusting wire, the adjusting wire is in threaded connection with the lower one-way valve cavity, the adjusting wire is sleeved with a spring, a sealing ball is arranged above the spring, the sealing ball is clamped and arranged at the lower port of the glue outlet channel and between the springs, and the glue outlet is further communicated with a needle.

3. A micrometric metering valve as claimed in claim 2 wherein a check valve gasket is provided between the lower check valve chamber and the lower valve body.

4. A microminiature metering valve as claimed in claim 1 wherein a cylinder is disposed above said upper valve body, and a piston of said cylinder is connected to said valve core.

5. A micro-metering valve as claimed in claim 4, wherein the cylinder body of the cylinder is connected with a micro head through a micro head seat, the lower end of the micro head is screwed with a stroke adjusting block, the periphery of the valve core is fixedly connected with a positioning floating rod, the tail end of the stroke adjusting block is arranged below the positioning floating rod, and the stroke adjusting block drives the positioning floating rod to move upwards under the rotating action of the micro head.

6. A micrometric metering valve as claimed in claim 1 wherein the outer peripheries of said valve core and said top core are each fitted with a flood seal ring.

7. A micrometric metering valve as claimed in claim 1 wherein upper and lower valve body seals are provided between said upper valve body and said lower valve body.

8. A micro-metering valve as claimed in claim 1, wherein the lower valve body is further provided with a glue inlet, and the glue inlet is communicated with the second glue inlet channel.

9. A micrometric metering valve as claimed in claim 1 wherein the upper valve body is also vented.