CN212155816U

CN212155816U - Temperature-resistant corrosion-resistant liquid injection needle valve

Info

Publication number: CN212155816U
Application number: CN202020463654.9U
Authority: CN
Inventors: 郑国平; 毕诗鸿
Original assignee: Nanjing Jieya Extrusion Equipment Co ltd
Current assignee: Nanjing Jieya Extrusion Equipment Co ltd
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2020-12-15
Anticipated expiration: 2030-04-01

Abstract

The utility model discloses a needle valve is annotated to temperature resistant corrosion resistant type liquid, including valve body and adjusting sleeve, adjusting sleeve has a connecting end, has seted up the holding chamber in the adjusting sleeve, and this holding intracavity has held the case to and set up in the case down of last case below, the valve body has a cooperation end and exit end, its characterized in that: a flexible corrugated pipe is also arranged between the upper valve core and the lower valve core; compared with the traditional O-shaped ring sealing structure, the O-shaped ring dynamic sealing structure is omitted, the structure is simple and reliable, and the processing and assembling requirements of the adjusting sleeve and the valve core are reduced; a temperature-resistant and corrosion-resistant gasket is arranged between the mating ends of the lower valve core and the valve body, one surface of the temperature-resistant and corrosion-resistant gasket is in sealing butt joint with the end surface of the mating end, and the other surface of the temperature-resistant and corrosion-resistant gasket is in sealing butt joint with the abutting surface of the lower valve core, so that the tolerance of the lower valve core to high-temperature and corrosive liquid is further improved, and the possibility of liquid leakage is reduced.

Description

Temperature-resistant corrosion-resistant liquid injection needle valve

Technical Field

The utility model relates to an extruder processing field, concretely relates to needle valve is annotated to temperature resistant corrosion-resistant type liquid.

Background

With the rapid development of the rubber and plastic industries, twin-screw extruders are increasingly being used. The twin-screw extruder is particularly advantageous in that it is excellent in mixing properties, and in actual production, various liquid auxiliaries are sometimes added to the extruder for blending operation. And (3) adding the liquid material into the double-screw extruder, namely requiring a liquid injection needle valve, atomizing the liquid material through the liquid injection needle valve, and then adding the atomized liquid material into the double-screw extruder.

The liquid injection needle valve mainly comprises a valve body and an adjusting sleeve, wherein the adjusting sleeve is provided with a connecting end, an accommodating cavity is formed in the adjusting sleeve, an upper valve core and a lower valve core arranged below the upper valve core are accommodated in the accommodating cavity, the upper valve core can slide relative to the lower valve core, the upper valve core and the accommodating cavity are in dynamic sealing, a sealing structure of an accommodating O-shaped sealing ring is adopted, the valve body is provided with a matching end and an outlet end, the matching end of the valve body is in threaded connection with the connecting end of the adjusting sleeve, in operation, a liquid metering pump conveys high-pressure fluid into the inner cavity of the liquid injection needle valve body, the valve needle moves upwards by overcoming the spring force and the resistance of the sealing element due to the action of hydraulic force, the valve needle penetrates through the adjusting sleeve, a gap is formed between.

However, when the temperature of the liquid to be filled is high and the corrosivity is high, the dynamic seal tolerance of the O-shaped seal ring is poor, the upper valve core is abraded in an up-and-down movement process, the seal structure is easy to damage, liquid leakage is generated, liquid metering is inaccurate, production is difficult, and the production environment is polluted; in addition, the sealing structure of the O-shaped sealing ring has relatively high requirements on the smoothness of the inner wall of the accommodating cavity of the adjusting sleeve and the assembling precision.

Disclosure of Invention

In order to solve the problem, the utility model discloses a needle valve is annotated to temperature resistant corrosion-resistant type liquid.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a temperature resistant corrosion resistant type liquid injection needle valve, includes valve body and adjusting sleeve, adjusting sleeve has a link end, has seted up the holding chamber in the adjusting sleeve, and this holding intracavity holds has last case to and set up in the case down of last case below, the valve body has a mating end and exit end, its characterized in that: the flexible corrugated pipe is arranged between the upper valve core and the lower valve core, one end of the flexible corrugated pipe is connected with the upper valve core in a sealing mode, the other end of the flexible corrugated pipe is connected with the lower valve core in a sealing mode, the outer wall of the flexible corrugated pipe is in clearance fit with the inner wall of the containing cavity, the matching end of the valve body extends into the adjusting sleeve and is connected with the connecting end of the adjusting sleeve through threads, the lower valve core is located above the matching end, the lower valve core is provided with a pressing surface, the pressing surface is opposite to the end face of the matching end, a temperature-resistant and corrosion-resistant gasket is arranged between the pressing surface and the end face of the matching end, one surface of the temperature-resistant and corrosion-resistant gasket is in sealing abutting connection with the end face of the matching end, and the other.

As an improvement of the utility model, the exit end of valve body is provided with the nozzle, the nozzle pass through the screw thread with exit end detachable connects, also be provided with the corrosion-resistant gasket of temperature resistant between the exit end of nozzle and valve body, the corrosion-resistant gasket of temperature resistant one side with the butt is sealed to the exit end, its another side with the butt is sealed to the nozzle.

As an improvement of the utility model, the temperature-resistant and corrosion-resistant gasket is a red copper gasket or a graphite composite gasket.

As an improvement of the utility model, the adjusting sleeve still includes an adjusting end, adjusting end fixedly connected with rotates the hand wheel, this rotation hand wheel the center of rotation line with the adjusting sleeve's axis coincides mutually.

As an improvement of the present invention, the flexible corrugated pipe is a stainless steel corrugated pipe.

As an improvement of the utility model, the both ends of stainless steel corrugated hose respectively with go up case and lower case welded connection.

Compared with the prior art, the utility model has the advantages of as follows:

1. the upper valve core and the lower valve core of the utility model are connected through the flexible corrugated pipe, compared with the traditional O-shaped ring sealing structure, the O-shaped ring moving sealing structure is cancelled, the structure is simple and reliable, and the processing and assembling requirements of the adjusting sleeve and the valve core are reduced;

2. a temperature-resistant and corrosion-resistant gasket is arranged between the lower valve core and the matching end of the valve body, one surface of the temperature-resistant and corrosion-resistant gasket is in sealing butt joint with the end surface of the matching end, and the other surface of the temperature-resistant and corrosion-resistant gasket is in sealing butt joint with the abutting surface of the lower valve core, so that the tolerance of the lower valve core to high-temperature and corrosive liquid is further improved, and the possibility of liquid leakage is reduced;

3. further the utility model discloses a nozzle passes through screw thread detachable and connects in the valve body exit end, and the mediation can be dismantled in the one side of it when blockking up to be convenient for on the other hand can be convenient for change the nozzle in different apertures.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

FIG. 2 is a partial view of the upper and lower valve cartridges of the present invention;

FIG. 3 is a partial view of the upper valve element and the lower valve element after the adjustment sleeve of the present invention is removed;

fig. 4 is a sectional view of the valve body of the present invention.

List of reference numerals: 1. a valve body; 11. a mating end; 111. an end face; 12. an outlet end; 13. a liquid injection port; 14. a valve needle; 2. an adjustment sleeve; 21. a connecting end; 22. an accommodating cavity; 3. an upper valve core; 4. a lower valve core; 41. pressing the surface; 5. a flexible bellows; 6. a temperature-resistant corrosion-resistant gasket; 7. a nozzle; 8. a spring.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Example (b): referring to fig. 1, a temperature-resistant corrosion-resistant liquid injection needle valve comprises a valve body 1 and an adjusting sleeve 2, wherein the adjusting sleeve 2 has a connecting end 21, an accommodating cavity 22 is formed in the adjusting sleeve 2, an upper valve core 3 is accommodated in the accommodating cavity 22, and a lower valve core 4 is arranged below the upper valve core 3, wherein the lower valve core 4 of the existing structure is fixedly connected in the accommodating cavity 22 of the adjusting sleeve 2, the upper valve core 3 is arranged in a manner of sliding relative to the lower valve core 4 along the vertical direction, a spring 8 is connected between the upper valve core 3 and the top of the accommodating cavity 22, a liquid flow passage is axially arranged in the valve body 1, a needle 14 is arranged in the liquid flow passage in a manner of sliding, one end of the needle 14 penetrates through the lower valve core 4 and is connected to the upper valve core 3, the other end of the needle extends downwards to an outlet end 12 of the valve body 1 and blocks an outlet of the liquid flow passage, and a, the valve body 1 is provided with an injection port 13, the injection port 13 is communicated with a liquid flow passage of the valve body 1, and the valve body 1 is also provided with a matching end 11 and an outlet end 12;

referring to fig. 1-3, a flexible corrugated pipe 5 is further disposed between the upper valve core 3 and the lower valve core 4, one end of the flexible corrugated pipe 5 is connected to the upper valve core 3 in a sealing manner, the other end of the flexible corrugated pipe is connected to the lower valve core 4 in a sealing manner, the flexible corrugated pipe 5 is connected to the upper valve core 3 and the lower valve core 4 in a sealing manner, specifically, in an interference fit or welding connection manner, an outer wall of the flexible corrugated pipe 5 is in clearance fit with an inner wall of the accommodating cavity 22, the clearance fit can separate the flexible corrugated pipe 5 from the inner wall of the accommodating cavity 22, so as to prevent the flexible corrugated pipe 5 from being worn during movement, the flexible corrugated pipe 5 can be a stainless steel corrugated hose, and has good corrosion resistance and temperature resistance, and can axially extend and retract along the axial direction, so as;

the valve body 1 is characterized in that a matching end 11 extends into an adjusting sleeve 2 and is connected with a connecting end 21 of the adjusting sleeve 2 through threads, a lower valve core 4 is positioned above the matching end 11, the lower valve core 4 is provided with a pressing surface 41, the pressing surface 41 is opposite to an end surface 111 of the matching end 11, and a temperature-resistant corrosion-resistant gasket 6 is arranged between the pressing surface 41 and the end surface 111 of the matching end 11;

preferably, the temperature-resistant corrosion-resistant gasket 6 is a red copper gasket, the red copper is a good sealing material, the texture is soft, and the temperature-resistant corrosion-resistant performance is good, when the adjusting sleeve 2 is screwed, the lower valve core 4 in the adjusting sleeve 2 can tightly press and attach the red copper gasket on the valve body 1, and the red copper gasket generates a certain amount of deformation through pressure, so that one surface of the temperature-resistant corrosion-resistant gasket 6 is in sealing and abutting joint with the end surface 111 of the matching end 11, and the other surface of the temperature-resistant corrosion-resistant gasket is in sealing and abutting joint with the abutting surface 41 of the lower valve core 4, so that a leakage channel is blocked, and a sealing;

when the metering valve works specifically, the liquid injection port 13 is connected with the metering pump through a pipeline, liquid under the pressure of a conveying belt of the metering pump enters a liquid channel of the valve body 1 from the liquid injection port 13 of the valve body 1, the needle valve 14 pushes the upper valve core 3 upwards and compresses the spring 8 under the action of hydraulic force, at the moment, the liquid can flow out from a small hole in the outlet end 12 of the valve body 1, and when the needle valve is closed, the compression spring 8 pushes the needle valve 14 downwards to enable the needle valve to return and block the outlet again.

The exit end 12 of valve body 1 is provided with nozzle 7, nozzle 7 pass through the screw thread with exit end 12 detachable is connected, also be provided with temperature resistant corrosion-resistant gasket 6 between nozzle 7 and the exit end 12 of valve body 1, the one side of temperature resistant corrosion-resistant gasket 6 with the sealed butt of exit end 12, its another side with the sealed butt of nozzle 7, the mediation can be dismantled in the jam time to dismantlement formula design on the one hand, and on the other hand can be convenient for change the nozzle in different apertures.

The temperature-resistant and corrosion-resistant gasket 6 is a red copper gasket or a graphite composite gasket, wherein the graphite composite gasket is an existing product, also called a flexible graphite metal reinforced composite gasket or a high-strength graphite gasket, and is a sealing gasket formed by compounding a metal toothed plate of punching teeth or a metal core plate of punching holes and flexible graphite particles.

The adjusting sleeve 2 further comprises an adjusting end, the adjusting end is fixedly connected with a rotating hand wheel (not shown in the figure), the rotating center line of the rotating hand wheel coincides with the axis of the adjusting sleeve 2, and the adjusting sleeve 2 can be conveniently rotated by rotating the hand wheel.

The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims

1. The utility model provides a temperature resistant corrosion-resistant type liquid injection needle valve, includes valve body (1) and adjusting sleeve (2), adjusting sleeve (2) have a connection end (21), seted up holding chamber (22) in adjusting sleeve (2), held last case (3) in this holding chamber (22) to and set up lower case (4) below last case (3), valve body (1) has a cooperation end (11) and exit end (12), its characterized in that: a flexible corrugated pipe (5) is further arranged between the upper valve core (3) and the lower valve core (4), one end of the flexible corrugated pipe (5) is connected with the upper valve core (3) in a sealing manner, the other end of the flexible corrugated pipe is connected with the lower valve core (4) in a sealing manner, the outer wall of the flexible corrugated pipe (5) is in clearance fit with the inner wall of the accommodating cavity (22), the matching end (11) of the valve body (1) extends into the adjusting sleeve (2) and is connected with the connecting end (21) of the adjusting sleeve (2) through threads, the lower valve core (4) is positioned above the matching end (11), the lower valve core (4) is provided with a pressure-resisting surface (41), the pressure-resisting surface (41) is arranged opposite to the matching end of the adjusting sleeve (11), a temperature-resistant and corrosion-resistant gasket (6) is arranged between the pressure-resisting surface (41) and the end surface of the matching end (11), one surface of the temperature-resistant and corrosion-resistant gasket (6) is, the other surface of the valve core is in sealing contact with a pressing surface (41) of the lower valve core (4).

2. The temperature-resistant corrosion-resistant liquid injection needle valve according to claim 1, characterized in that: exit end (12) of valve body (1) are provided with nozzle (7), nozzle (7) through the screw thread with exit end (12) detachable connects, also be provided with temperature resistant corrosion-resistant gasket (6) between exit end (12) of nozzle (7) and valve body (1), the one side of temperature resistant corrosion-resistant gasket (6) with the sealed butt of exit end (12), its another side with the sealed butt of nozzle (7).

3. The temperature-resistant corrosion-resistant liquid injection needle valve according to claim 1 or 2, characterized in that: the temperature-resistant and corrosion-resistant gasket (6) is a red copper gasket or a graphite composite gasket.

4. The temperature-resistant corrosion-resistant liquid injection needle valve according to claim 1, characterized in that: the adjusting sleeve (2) further comprises an adjusting end, the adjusting end is fixedly connected with a rotating hand wheel, and the rotating center line of the rotating hand wheel coincides with the axis of the adjusting sleeve (2).

5. The temperature-resistant corrosion-resistant liquid injection needle valve according to claim 1, characterized in that: the flexible corrugated pipe (5) is a stainless steel corrugated hose.

6. The temperature-resistant corrosion-resistant liquid injection needle valve according to claim 5, characterized in that: and two ends of the stainless steel corrugated hose are respectively connected with the upper valve core (3) and the lower valve core (4) in a welding manner.