CN218818384U

CN218818384U - Back pressure type liquid injection needle valve

Info

Publication number: CN218818384U
Application number: CN202222700786.0U
Authority: CN
Inventors: 郗真超; 刘杰杰; 赵多顺
Original assignee: Guangzhou Ascend Precision Machinery Co ltd
Current assignee: Guangzhou Ascend Precision Machinery Co ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-04-07
Anticipated expiration: 2032-10-13

Abstract

The utility model discloses a liquid needle valve is annotated to back pressure, including adapting unit, establish at the first casing on adapting unit top and establish the notes liquid mouth in the adapting unit bottom, the top of first casing is equipped with annotates the liquid mouth, first casing, adapting unit and annotate the inner chamber that is equipped with the intercommunication in the liquid mouth, be equipped with the valve body that seals the setting in the first casing, the valve body include the second casing and with second shells inner wall sliding fit's piston, the inner wall fixed connection of second casing and first casing, the bottom of second casing is equipped with the opening, the bottom of piston passes the opening and cooperatees with adapting unit's top, be equipped with elastomeric element between the interior top surface of second casing and the piston, be equipped with the connecting rod in the adapting unit, the bottom of annotating the liquid mouth is equipped with the liquid outlet, it is equipped with the thimble that is used for the shutoff liquid outlet to annotate the liquid mouth, the top of connecting rod links to each other with the bottom of piston, this liquid needle valve is annotated to back pressure can provide the stable pressure environment, guarantee to annotate the liquid precision, moreover, the steam generator is simple structure, and convenient operation.

Description

Back pressure type liquid injection needle valve

Technical Field

The utility model is used for annotate liquid needle valve technical field, especially relate to a liquid needle valve is annotated to back pressure type.

Background

The existing liquid injection needle valve needs to control air pressure through an electromagnetic valve to realize the actions of opening and closing the valve, liquid can only be fed from the side, liquid injection needs to be carried out under the normal pressure condition in the production process of products such as lithium batteries, medical treatment, cosmetics and the like, if the air pressure is unstable, the liquid injection nozzle can have the condition of liquid hanging or dropping when liquid injection is finished, residual liquid is easy to drop on the products, the pollution of the products is caused, the waste of the liquid is also caused, and the liquid injection precision and efficiency are influenced; if use under the vacuum condition, current annotate liquid needle valve can the dropping liquid, can not effectively block the influence of high vacuum environment to liquid.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide an annotate liquid needle valve, it can provide stable pressure environment, is difficult for the dropping liquid.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a needle valve is annotated to back pressure type, includes adapting unit, establishes the first casing on adapting unit top with establish the notes liquid mouth of adapting unit bottom, the top of first casing is equipped with annotates the liquid mouth, first casing adapting unit with annotate the inner chamber that is equipped with the intercommunication in the liquid mouth, be equipped with the valve body that seals the setting in the first casing, the valve body include the second casing and with second shells inner wall sliding fit's piston, the second casing with the inner wall fixed connection of first casing, the bottom of second casing is equipped with the opening, the bottom of piston is passed the opening with adapting unit's top cooperatees, the interior top surface of second casing with be equipped with elastomeric element between the piston, be equipped with the connecting rod in the adapting unit, the bottom of annotating the liquid mouth is equipped with the liquid outlet, be equipped with in the liquid mouth and be used for the shutoff the thimble of liquid outlet, the top of connecting rod with the bottom of piston links to each other, the bottom of connecting rod with the top of thimble links to each other.

Preferably, the bottom of piston is equipped with connecting portion, the connecting rod top be equipped with connecting portion complex recess, the piston pass through connecting portion with the connecting rod joint.

Preferably, the inner periphery of the liquid injection nozzle is provided with a first sealing ring, the first sealing ring is located at the position of the liquid outlet, and the first sealing ring is matched with the outer periphery of the ejector pin.

Preferably, the periphery of the second shell is provided with a fixing part connected with the inner wall of the first shell, the fixing part is provided with a channel for liquid circulation, and the top of the second shell is provided with a plugging part matched with the second shell.

Preferably, the second housing is a piston sleeve.

Preferably, the elastic component comprises a spring, one end of the spring is connected with the plugging component, and the other end of the spring is connected with the top of the piston.

Preferably, the fixing portion is located at the top end of the second shell, and a second sealing ring is arranged between the blocking component and the fixing portion.

Preferably, the top of first casing is equipped with the liquid inlet connector, be equipped with the inlet on the liquid inlet connector, the inlet with the inner chamber is linked together.

Preferably, the bottom of liquid inlet joint stretches into in the first casing, the liquid inlet joint with be equipped with the third sealing washer between the first casing, the third sealing washer cover is established the periphery of liquid inlet joint.

Preferably, the periphery of the piston is sleeved with a fourth sealing ring matched with the inner wall of the second shell.

One of the above technical solutions has at least one of the following advantages or beneficial effects: the back pressure type liquid injection needle valve comprises a connecting part, a first shell and a liquid injection nozzle, wherein a liquid injection port is formed in the top of the first shell, a valve body is arranged in the first shell, the valve body comprises a second shell, a piston and an elastic part, a connecting rod is arranged in the connecting part, a liquid outlet is formed in the bottom of the liquid injection nozzle, an ejector pin is arranged in the liquid injection nozzle, the top end of the connecting rod is connected with the piston, and the bottom end of the connecting rod is connected with the ejector pin; when the hydraulic pressure is smaller than the elastic force of the elastic component, the piston moves downwards under the action of the elastic component to overcome the liquid pressure, the connecting rod drives the thimble to descend, the thimble plugs the liquid outlet, the pipeline is blocked to realize sealing, the backpressure type liquid injection needle valve can realize the functions of pressure stabilization and backpressure, a stable pressure environment is provided, liquid is not hung or leaked under the normal pressure liquid injection condition, and the performance is stable; the liquid injection needle valve has the advantages that the influence of a vacuum environment on liquid can be prevented under the vacuum liquid injection condition, the pipeline is prevented from generating bubbles, the liquid injection precision is guaranteed, the backpressure type liquid injection needle valve is provided with the hydraulic switch, the valve is opened and closed without air pressure control, the structure is simple, the operation is convenient, and the liquid injection needle valve can be widely applied to industries such as an electric liquid injection system of a battery production line and medical biochemical filling.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the present invention, if there is a description of directions (up, down, left, right, front and back), it is only for convenience of description of the technical solution of the present invention, and it is not intended to indicate or imply that the technical features indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the utility model, the meaning of a plurality of is one or more, the meaning of a plurality of is more than two, and the meaning of more than two is understood as not including the number; "above", "below", "within" and the like are understood to include the present numbers. In the description of the present invention, if there is any description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the present invention, unless otherwise explicitly defined, the terms "set", "install", "connect", and the like are to be understood in a broad sense, and for example, may be directly connected or may be indirectly connected through an intermediate medium; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The technical skill in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.

Wherein, fig. 1 shows a reference direction coordinate system of the embodiment of the present invention, and the following describes the embodiment of the present invention with reference to the direction shown in fig. 1.

The embodiment of the utility model provides a back pressure type liquid injection needle valve, refer to fig. 1, including the connecting part 200, the first casing 100 arranged on the top of the connecting part 200 and the liquid injection nozzle 300 arranged on the bottom of the connecting part 200, the top of the first casing 100 is provided with the liquid injection port, the inner chambers communicated with each other are arranged in the first casing 100, the connecting part 200 and the liquid injection nozzle 300, the valve body 110 arranged in the first casing 100 is sealed, the valve body 110 comprises a second casing 111 and a piston 112 in sliding fit with the inner wall of the second casing 111, the second casing 111 is fixedly connected with the inner wall of the first casing 100, the bottom of the second casing 111 is provided with an opening, the bottom of the piston 112 passes through the opening to be matched with the top of the connecting part 200, an elastic part 113 is arranged between the inner top surface of the second casing 111 and the piston 112, a connecting rod 210 is arranged in the connecting part 200, a liquid outlet 310 is arranged at the bottom of the liquid injection nozzle 300, an ejector pin 320 for blocking the liquid outlet 310 is arranged in the liquid injection nozzle 300, the top end of the connecting rod 210 is connected with the bottom of the piston 112, the bottom end of the connecting rod 210 is connected with the top of the ejector pin 320, when the liquid injection nozzle is used, liquid is injected from the liquid injection port at the top of the first shell 100, the liquid flows to the bottom of the piston 112 from a gap between the first shell 100 and the second shell 111, when the hydraulic pressure is greater than the elastic force of the elastic component 113, the piston 112 moves upwards under the action of the hydraulic pressure to overcome the elastic force of the elastic component 113, the connecting rod 210 drives the ejector pin 320 to lift, the ejector pin 320 is separated from the liquid outlet 310, the pipeline is connected, and the liquid flows out of the liquid outlet 310; when the hydraulic pressure is smaller than the elastic force of the elastic component 113, the piston 112 moves downwards under the action of the elastic component 113 to overcome the liquid pressure, the connecting rod 210 drives the thimble 320 to descend, the thimble 320 blocks the liquid outlet 310, the pipeline is blocked, and sealing is realized; the liquid injection needle valve has the advantages that the influence of a vacuum environment on liquid can be prevented under the vacuum liquid injection condition, the pipeline is prevented from generating bubbles, the liquid injection precision is guaranteed, the backpressure type liquid injection needle valve is provided with the hydraulic switch, the valve is opened and closed without air pressure control, the structure is simple, the operation is convenient, and the liquid injection needle valve can be widely applied to industries such as an electric liquid injection system of a battery production line and medical biochemical filling.

In some embodiments, referring to fig. 1, the bottom of the piston 112 is provided with a connecting portion 114, the top of the connecting rod 210 is provided with a groove matching with the connecting portion 114, and the piston 112 is clamped with the connecting rod 210 through the connecting portion 114, so that the piston 112 is stably connected with the connecting rod 210.

As a preferred embodiment of the present invention, referring to fig. 1, the inner periphery of the liquid filling nozzle 300 is provided with a first sealing ring 330, the first sealing ring 330 is located at the position of the liquid outlet 310, and the first sealing ring 330 is mutually matched with the outer periphery of the thimble 320, thereby effectively preventing liquid leakage.

In some embodiments, referring to fig. 1, the outer periphery of the second housing 111 is provided with a fixing portion 115 connected to the inner wall of the first housing 100, so as to prevent the second housing 111 from moving in the first housing 100 during a hydraulic process, the fixing portion 115 is provided with a passage for liquid to flow through, so as to ensure that the liquid can flow to the bottom of the piston 112, and the top of the second housing 111 is provided with a blocking member 116 engaged with the second housing 111, so as to ensure the sealing performance of the valve body 110 and ensure the effective operation of the valve body 110.

Preferably, referring to fig. 1, the second housing 111 is a piston sleeve, which ensures efficient operation of the piston 112.

In some embodiments, referring to fig. 1, the elastic member 113 comprises a spring, one end of which is connected to the blocking member 116 and the other end of which is connected to the top of the piston 112 to provide an elastic force.

As a preferred embodiment of the present invention, referring to fig. 1, the fixing portion 115 is located at the top end of the second housing 111, and stably fixes the second housing 111 inside the first housing 110, and the second sealing ring 117 is disposed between the blocking member 116 and the fixing portion 115, so as to ensure the sealing effect of the valve body 110.

In some embodiments, referring to fig. 1, the top of the first casing 100 is provided with a liquid inlet connector 120, the liquid inlet connector 120 is provided with a liquid inlet 121, and the liquid inlet 121 is communicated with the inner cavity.

Referring to fig. 1, the bottom of the inlet connector 120 extends into the first casing 100, a third sealing ring 130 is disposed between the inlet connector 120 and the first casing 100, and the third sealing ring 130 is disposed on the periphery of the inlet connector 120, so as to ensure the sealing performance between the inlet connector 120 and the first casing 100.

Referring to fig. 1, the outer circumferential sleeve of the piston 112 is provided with a fourth sealing ring 118 engaged with the inner wall of the second housing 111, so that the piston 112 is connected with the inner wall of the second housing 111 in a sealing manner, thereby ensuring the normal operation of the valve body 110.

In the description of the present specification, references to the description of the term "example," "an embodiment," or "some embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims

1. The utility model provides a needle valve is annotated to back pressure type which characterized in that: the improved liquid injection valve comprises a connecting part, a first shell arranged at the top end of the connecting part and a liquid injection nozzle arranged at the bottom end of the connecting part, wherein a liquid injection port is arranged at the top of the first shell, the first shell is provided with an inner cavity communicated with the connecting part and the liquid injection nozzle, a valve body arranged in the first shell in a sealed manner comprises a second shell and a piston in sliding fit with the inner wall of the second shell, the second shell is fixedly connected with the inner wall of the first shell, the bottom of the second shell is provided with an opening, the bottom of the piston penetrates through the opening to be matched with the top end of the connecting part, an elastic part is arranged between the inner top surface of the second shell and the piston, a connecting rod is arranged in the connecting part, the bottom of the liquid injection nozzle is provided with a liquid outlet, an ejector pin for plugging the liquid outlet is arranged in the liquid injection nozzle, the top end of the connecting rod is connected with the bottom end of the piston, and the bottom end of the connecting rod is connected with the top end of the ejector pin.

2. The back-pressure liquid injection needle valve according to claim 1, wherein: the bottom of piston is equipped with connecting portion, the connecting rod top be equipped with connecting portion complex recess, the piston passes through connecting portion with the connecting rod joint.

3. The needle valve is annotated to back pressure-type, according to claim 1, characterized in that: the inner periphery of the liquid injection nozzle is provided with a first sealing ring, the first sealing ring is located at the position of the liquid outlet, and the first sealing ring is matched with the outer periphery of the ejector pin.

4. The needle valve is annotated to back pressure-type, according to claim 1, characterized in that: the periphery of the second shell is provided with a fixing part connected with the inner wall of the first shell, the fixing part is provided with a channel for liquid circulation, and the top of the second shell is provided with a plugging part matched with the second shell.

5. The needle valve is annotated to back pressure-type, according to claim 1, characterized in that: the second housing is a piston sleeve.

6. The back-pressure liquid injection needle valve according to claim 4, wherein: the elastic component comprises a spring, one end of the spring is connected with the plugging component, and the other end of the spring is connected with the top of the piston.

7. The back pressure liquid injection needle valve according to claim 6, characterized in that: the fixing part is positioned at the top end of the second shell, and a second sealing ring is arranged between the plugging component and the fixing part.

8. The needle valve is annotated to back pressure-type, according to claim 1, characterized in that: the top of first casing is equipped with liquid inlet joint, be equipped with the inlet on the liquid inlet joint, the inlet with the inner chamber is linked together.

9. The back-pressure liquid injection needle valve according to claim 8, wherein: the bottom of liquid inlet joint stretches into in the first casing, liquid inlet joint with be equipped with the third sealing washer between the first casing, the third sealing washer cover is established liquid inlet joint's periphery.

10. The needle valve is annotated to back pressure-type, according to claim 1, characterized in that: and a fourth sealing ring matched with the inner wall of the second shell is sleeved on the periphery of the piston.