CN214662106U

CN214662106U - Suck-back firing pin valve

Info

Publication number: CN214662106U
Application number: CN202120531663.1U
Authority: CN
Inventors: 罗志伟; 杨鹏; 陈炳庆; 陈勇庆
Original assignee: Xiamen Congwei Technology Co ltd
Current assignee: Xiamen Congwei Technology Co ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-11-09
Anticipated expiration: 2031-03-15

Abstract

The utility model provides a resorption formula hits needle valve, including valve body, firing pin and firing pin actuating mechanism, the valve body is formed with the glue inlet that is linked together, advances gluey chamber, resorption chamber and goes out the jiao zui in proper order, advances to glue and still is equipped with a sealing block between chamber and the resorption chamber, and the sealing block has a circulation passageway that leads to into gluey chamber and resorption chamber, and the circulation passageway has certain length and the equal diameter setting; the firing pin penetrates through the valve body in a sealing mode and enters the glue inlet cavity, the head of the firing pin is connected with a sealing column which is arranged in an equal diameter mode through a thin column, the diameter of the sealing column is the same as the inner diameter of the circulation passageway, and the firing pin driving mechanism is connected with the firing pin in a driving mode and can drive the sealing column of the head portion of the firing pin to move back and forth among the glue inlet cavity, the circulation passageway and the suck-back cavity. Has the characteristics of good sealing performance and no residual glue outflow.

Description

Suck-back firing pin valve

Technical Field

The utility model relates to a point is glued the field, concretely relates to resorption formula that is used for point to glue hits needle valve.

Background

The dispensing system is a process device widely applied to the product production field, and the application range of the dispensing system covers the processes of bonding, filling, coating, sealing, filling, dropping, scribing, gluing and the like of products. The dispensing valve is a core component of the dispensing system, and has decisive influence on the flow rate, flow velocity, appearance and the like of glue application. As shown in chinese patent document CN201521129327 entitled "needle plunger valve", the conventional needle plunger valve uses a needle valve head to directly push against an inlet of a glue outlet, so that the sealing area is small and leakage is likely to occur. Meanwhile, after the conventional striker valve stops glue discharging, the situation that residual glue continues to flow out can also occur, and the glue dispensing is influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a resorption formula hits the needle valve, can the effectual leakproofness that improves when gluing absolutely; meanwhile, the condition that the residual glue continues to flow out after glue breaking is also avoided.

In order to achieve the above purpose, the utility model provides a technical scheme as follows:

a resorption type needle impacting valve comprises a valve body, a striker and a striker driving mechanism, wherein a rubber inlet, a rubber inlet cavity, a resorption cavity and a rubber outlet which are communicated are sequentially formed in the valve body; the firing pin is hermetically arranged in the valve body in a penetrating manner and enters the glue inlet cavity, the head of the firing pin is connected with a sealing column which is arranged in an equal diameter mode through a thin column, the diameter of the sealing column is the same as the inner diameter of the circulation passage, and the firing pin driving mechanism is in driving connection with the firing pin and can drive the sealing column of the head of the firing pin to reciprocate among the glue inlet cavity, the circulation passage and the suck-back cavity.

Furthermore, a first flow regulating hole communicated with the circulation passage is formed at one end, close to the glue inlet cavity, of the sealing block, and the first flow regulating hole is a tapered hole with the diameter gradually increased from the circulation passage to the glue inlet cavity.

Furthermore, a second flow regulating hole communicated with the circulation passage is formed at one end, close to the suck-back cavity, of the sealing block, and the second flow regulating hole is a conical hole with the diameter gradually increased from the circulation passage to the suck-back cavity.

Furthermore, the sealing block consists of a middle sealing block positioned in the middle, and a first flow regulating block and a second flow regulating block positioned at two ends of the middle sealing block; the middle sealing block forms the circulation passage, the first flow regulating block faces the glue inlet cavity and is provided with a first flow regulating hole communicated with the circulation passage, and the first flow regulating hole is a conical hole with the gradually increased aperture in the direction from the circulation passage to the glue inlet cavity; the second flow regulating block faces the suck-back cavity and is provided with a second flow regulating hole communicated with the circulation passage, and the second flow regulating hole is a conical hole with the gradually increased aperture in the direction from the circulation passage to the suck-back cavity.

Furthermore, the front end and the rear end of the sealing column are both provided with inclined guide surfaces.

Further, the valve body comprises a glue outlet block, a resorption block, a glue inlet block and a rear cover which are sequentially connected, the glue outlet block forms the glue outlet nozzle, the resorption block forms the resorption cavity, and a sealing gasket for sealing a connecting gap between the glue outlet block and the resorption block is arranged between the resorption cavity and the glue outlet nozzle; the glue inlet and the glue inlet cavity are formed in the glue inlet block, and the sealing block is arranged at the position of a connecting gap between the suck-back block and the glue inlet block; the rear cover and the glue inlet block are also provided with through holes communicated with each other and communicated to the glue inlet cavity, the through holes are internally provided with striker guide blocks, guide holes are formed in the striker guide blocks and are positioned at the connecting gap between the glue inlet block and the rear cover, and the striker penetrates into the through holes through the rear cover and is in guide fit with the guide holes of the striker guide blocks.

Furthermore, a lubricating cavity communicated with the guide hole is formed in the firing pin guide block, and oil inlet holes communicated with the lubricating cavity are formed in the rear cover and the firing pin guide block.

Further, the striker driving mechanism is an electric push rod, and the electric push rod is connected with the striker through a coupler.

Furthermore, the valve body and the firing pin driving mechanism are assembled on the base.

Through the utility model provides a technical scheme has following beneficial effect:

the device has two working states: 1. when the sealing column is separated from the sealing block in the glue inlet cavity, the sealing column is in a normal glue outlet state, moves along with the fact that the sealing column extends out to be close to the circulation passageway until entering the circulation passageway, achieves sealing fit with the sealing block, further blocks circulation of glue, achieves glue breaking, has a long sealing fit surface with the circulation passageway, is good in sealing effect and is not prone to leakage; 2. the sealing post is in normal play gluey state when resorption intracavity and with the separation of sealed piece, along with the sealed post contracts to be close to the circulation passageway and moves until getting into in the circulation passageway, realize the sealed cooperation with sealed piece, and then the circulation of shutoff glue realizes gluing absolutely, and the continuation of sealed post contracts to make and forms the negative pressure in the resorption intracavity to the residual glue in the resorption play jiao zui. Has the characteristics of good sealing performance and no residual glue outflow.

Drawings

FIG. 1 is a schematic external view of a suck-back striker valve according to an embodiment;

FIG. 2 is a cross-sectional view of a back suction type striker valve in an embodiment;

FIG. 3 is a first schematic view illustrating an operation state of the suck-back type striker valve in the embodiment;

FIG. 4 is a schematic view of the second operation state of the back suction type striker valve in the embodiment;

FIG. 5 is a third schematic view illustrating the operation of the back suction type striker valve in the embodiment;

FIG. 6 is a fourth schematic view illustrating an operation state of the back suction type striker valve in the embodiment;

FIG. 7 is a fifth schematic view illustrating an operation state of the suck-back type striker valve in the embodiment;

fig. 8 is a schematic diagram showing an operation state of the back suction type striker valve in the embodiment six.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 8, the resorption type needle impacting valve provided by the embodiment includes a valve body 10, a striker 40 and a striker driving mechanism 50, a glue inlet 101, a glue inlet cavity 102, a resorption cavity 103 and a glue outlet 104 which are communicated with each other are sequentially formed in the valve body 10, a sealing block 20 is further disposed between the glue inlet cavity 102 and the resorption cavity 103, the sealing block 20 has a circulation passage 201 communicating the glue inlet cavity 102 and the resorption cavity 103, and the circulation passage 201 has a certain length and is arranged in an equal diameter manner; the striker 40 is hermetically arranged in the valve body 10 in a penetrating manner and enters the glue inlet cavity 102, the head of the striker 40 is connected with a sealing column 41 which is arranged in an equal diameter manner through a thin column 42, and the diameter of the thin column 42 is smaller than that of the sealing column 41. More specifically, in the present embodiment, the striker 40, the thin column 42 and the sealing column 41 are integrally formed, but of course, the present invention is not limited to this in other embodiments. The diameter of the sealing column 41 is the same as the inner diameter of the circulation passage 201, and the striker driving mechanism 50 is connected with the striker 40 in a driving manner and can drive the sealing column 41 at the head of the striker 40 to reciprocate among the glue inlet cavity 102, the circulation passage 201 and the suck-back cavity 103.

The device has two working states: 1. when the sealing column 41 is in the glue inlet cavity 102 and separated from the sealing block (as shown in fig. 3 and 4), the sealing column is in a normal glue outlet state, and moves along with the fact that the sealing column 41 extends out to be close to the circulation passage 201 until entering the circulation passage 201, so that sealing matching with the sealing block 20 is realized, and then the circulation of glue is blocked (as shown in fig. 5), glue breaking is realized, the sealing column 41 and the circulation passage 201 have a longer sealing matching surface, the sealing effect is better, and leakage is not easy to occur; 2. when the sealing post 41 is in the suck-back chamber 103 and separated from the sealing block 20, it is in a normal glue discharging state (as shown in fig. 6 and 7), and moves close to the circulation passage 201 as the sealing post 41 retracts until entering the circulation passage 201, so as to realize sealing cooperation with the sealing block 20, and further block the circulation of glue (as shown in fig. 5), so as to realize glue breaking, and the continuous retraction of the sealing post 41 (i.e. the continuous retraction to the state shown in fig. 8 on the basis of fig. 5) enables negative pressure to be formed in the suck-back chamber 103, thereby sucking back the residual glue in the glue outlet 104. Has the characteristics of good sealing performance and no residual glue outflow.

Specifically, a first flow rate adjusting hole 202 communicated with the circulation passage 201 is further formed at one end of the sealing block 20 close to the glue inlet cavity 102, and the first flow rate adjusting hole 202 is a tapered hole with a gradually increasing aperture from the circulation passage 201 to the glue inlet cavity 102. Due to the arrangement of the first flow rate adjusting hole 202, when the sealing post 41 is close to the circulation passageway 201 (i.e., in the extending process) in the glue inlet cavity 102, as the position shown in fig. 3 is moved to the position shown in fig. 4, the distance between the sealing post 41 and the conical surface of the first flow rate adjusting hole 202 is also changed, i.e., the flow area is changed, so that the flow rate adjustment of the glue outlet is realized, the structure is simple, and the operation of flow rate adjustment is simple and convenient. Of course, in other embodiments, the structure of the first flow rate adjustment hole 202 is not limited to a smooth transition taper hole, and may be formed by connecting a plurality of holes with stepwise changing hole diameters; further alternatively, the first flow rate adjustment hole 202 need not be provided.

Similarly, the sealing block 20 is further formed with a second flow rate adjusting hole 203 communicating with the circulation passage 201 at an end close to the suck-back chamber 103, and the second flow rate adjusting hole 203 is a tapered hole with a gradually increasing aperture diameter from the circulation passage 201 to the suck-back chamber 103. Due to the arrangement of the second flow rate adjusting hole 203, when the sealing post 41 is close to the circulation passageway 201 in the suck-back cavity 103 (i.e., in the retraction process), as the position shown in fig. 6 is moved to the position shown in fig. 7, the distance between the sealing post 41 and the conical surface of the second flow rate adjusting hole 203 is also changed, i.e., the flow area is changed, so that the flow rate adjustment of the discharged glue is realized, the structure is simple, and the operation of flow rate adjustment is simple and convenient. Of course, in other embodiments, the structure of the second flow rate adjustment hole 203 is not limited to a smooth transition taper hole, and may be formed by connecting a plurality of holes with stepwise changing hole diameters; further alternatively, a structure or the like in which the second flow rate adjustment hole 203 is provided may not be necessary.

The sealing block 20 is composed of a middle sealing block 21 positioned at the middle position and a first flow regulating block 22 and a second flow regulating block 23 positioned at two ends of the middle sealing block 21; the middle sealing block 21 forms the circulation passage 201, the first flow regulating block 22 faces the glue inlet cavity 102 and forms the first flow regulating hole 202, and the second flow regulating block 23 faces the suck-back cavity 103 and forms the second flow regulating hole 203. So set up, can process three sealed piece monomers respectively, follow-up mode through the assembly is connected, and the meeting of machining precision control is better. Of course, in other embodiments, the sealing block 20 may be a unitary structure.

The front end and the rear end of the sealing column 41 are both provided with inclined guide surfaces, and the arrangement of the inclined guide surfaces ensures that the sealing column 41 plays a role of guiding when being matched with the circulation passage, and the sealing column 41 can be more smoothly inserted into the circulation passage 201. Of course, in other embodiments, the inclined guide surface may not be required.

Specifically, valve body 10 glues piece 11, resorption piece 12, advances gluey piece 13 and back lid 14 including the play that connects gradually, it forms to go out gluey piece 11 go out gluey mouth 104, resorption piece 12 is formed with resorption chamber 103, be provided with a sealed pad 31 that is used for sealed play gluey piece 11 and the connection gap between the resorption piece 12 between resorption chamber 103 and play gluey mouth 104 to sealed play gluey piece 11 and the connection gap between resorption piece 12.

The glue inlet 101 and the glue inlet cavity 102 are formed in the glue inlet block 13, and the sealing block 20 is arranged at the position of a connecting gap between the suck-back block 12 and the glue inlet block 13, so that the connecting gap between the suck-back block 12 and the glue inlet block 13 is sealed.

The rear cover 14 and the glue inlet block 13 are further provided with through holes (not marked) communicated with each other and penetrating to the glue inlet cavity 102, the through holes are internally provided with striker guide blocks 32, and the striker guide blocks 32 are provided with guide holes (not marked) and are positioned at the connecting gap between the glue inlet block 13 and the rear cover 14 so as to seal the connecting gap between the glue inlet block 13 and the rear cover 14. More specifically, sealing rings (not shown) are provided between the striker guide block 32 and the glue feeding block 13 and between the striker guide block 32 and the rear cover 14, and are sealed by the sealing rings. The striker 40 is inserted into the through hole through the rear cover 14 and is guided to engage with the guide hole of the striker guide 32.

The valve body 10 is arranged in such a way, so that the assembly requirements of the rubber outlet block 11, the suck-back block 12, the rubber inlet block 13 and the rear cover 14 can be reduced; and the valve body 10 is divided into a rubber outlet block 11, a suck-back block 12, a rubber inlet block 13 and a rear cover 14, so that the internal components can be conveniently assembled and disassembled, and the maintenance and the like are facilitated. Of course, in other embodiments, the structure of the valve body 10 is not limited thereto.

More specifically, the striker guide block 32 further forms a lubrication cavity 321 communicating with the guide hole, the rear cover 14 and the striker guide block 32 are further provided with an oil inlet 105 communicating with and penetrating through the lubrication cavity 321, and the lubricating oil enters the lubrication cavity 321 through the oil inlet 105 and then flows into the guide hole to lubricate the striker 40, so that the action is smoother and the loss is reduced.

More specifically, the plunger seal 33 is further mounted on both ends of the striker guide block 32, and the plunger seal 33 is in sealing engagement with the striker 40 to prevent leakage of the lubricating oil.

The striker driving mechanism 50 is an electric push rod, the electric push rod is connected with the striker 40 through a coupler 51, the reciprocating motion of the striker 40 is controlled by the electric push rod, the stroke of the electric push rod can be edited to push the striker 40 to complete the on-off of the glue, and compared with a pneumatic control structure adopted in the prior art, the striker driving mechanism has higher precision and simpler structure.

More specifically, the needle valve further comprises a base 60, and the valve body 10 and the striker driving mechanism 50 are both assembled on the base 60, so that an integrated fixing structure of the resorption type striker valve is realized, the precision of a matching position is kept, and the transportation is facilitated.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a needle valve is hit to resorption formula, includes valve body, firing pin and firing pin actuating mechanism, be formed with in proper order in the valve body and advance the jiao kou, advance gluey chamber, resorption chamber and go out jiao zui that are linked together, its characterized in that: a sealing block is arranged between the glue inlet cavity and the resorption cavity, the sealing block is provided with a circulation passage communicated with the glue inlet cavity and the resorption cavity, and the circulation passage has a certain length and is arranged in an equal diameter way; the firing pin is hermetically arranged in the valve body in a penetrating manner and enters the glue inlet cavity, the head of the firing pin is connected with a sealing column which is arranged in an equal diameter mode through a thin column, the diameter of the sealing column is the same as the inner diameter of the circulation passage, and the firing pin driving mechanism is in driving connection with the firing pin and can drive the sealing column of the head of the firing pin to reciprocate among the glue inlet cavity, the circulation passage and the suck-back cavity.

2. The suck-back striker valve of claim 1, wherein: the sealing block is provided with a first flow adjusting hole communicated with the circulation passage at one end close to the glue inlet cavity, and the first flow adjusting hole is a tapered hole with the diameter gradually increased from the circulation passage to the glue inlet cavity.

3. The suck-back striker valve of claim 1, wherein: and a second flow regulating hole communicated with the circulation passage is formed at one end of the sealing block close to the back suction cavity, and the second flow regulating hole is a tapered hole with the gradually increased aperture from the circulation passage to the back suction cavity.

4. The suck-back striker valve of claim 1, wherein: the sealing block consists of a middle sealing block positioned in the middle, and a first flow regulating block and a second flow regulating block positioned at two ends of the middle sealing block; the middle sealing block forms the circulation passage, the first flow regulating block faces the glue inlet cavity and is provided with a first flow regulating hole communicated with the circulation passage, and the first flow regulating hole is a conical hole with the gradually increased aperture in the direction from the circulation passage to the glue inlet cavity; the second flow regulating block faces the suck-back cavity and is provided with a second flow regulating hole communicated with the circulation passage, and the second flow regulating hole is a conical hole with the gradually increased aperture in the direction from the circulation passage to the suck-back cavity.

5. The suck-back striker valve of claim 1, wherein: the front and rear end portions of the sealing post are formed with inclined guide surfaces.

6. The suck-back striker valve of claim 1, wherein: the valve body comprises a glue outlet block, a resorption block, a glue inlet block and a rear cover which are sequentially connected, the glue outlet block forms the glue outlet nozzle, the resorption block forms the resorption cavity, and a sealing gasket for sealing a connecting gap between the glue outlet block and the resorption block is arranged between the resorption cavity and the glue outlet nozzle; the glue inlet and the glue inlet cavity are formed in the glue inlet block, and the sealing block is arranged at the position of a connecting gap between the suck-back block and the glue inlet block; the rear cover and the glue inlet block are also provided with through holes communicated with each other and communicated to the glue inlet cavity, the through holes are internally provided with striker guide blocks, guide holes are formed in the striker guide blocks and are positioned at the connecting gap between the glue inlet block and the rear cover, and the striker penetrates into the through holes through the rear cover and is in guide fit with the guide holes of the striker guide blocks.

7. The suck-back striker valve of claim 6, wherein: the rear cover and the striker guide block are also provided with oil inlets communicated with the lubricating cavity.

8. The suck-back striker valve of claim 1, wherein: the firing pin driving mechanism is an electric push rod, and the electric push rod is connected with the firing pin through a coupler.

9. The suck-back striker valve of claim 1, wherein: the valve body and the firing pin driving mechanism are assembled on the base.