阅读说明：本技术 一种水下橡胶连接器的插头构件及其制作方法 (Plug component of underwater rubber connector and manufacturing method thereof ) 是由 陈四清 王飞 徐强 于 2021-08-05 设计创作，主要内容包括：本申请涉及一种水下橡胶连接器的插头构件及其制作方法,涉及电缆水下连接技术领域。本制作方法包括首先对铜零件的表面进行粗糙化处理,并在所述粗糙化处理结束后在所述铜零件的表面涂覆一层粘合剂,然后将外壳体、垫座和所述铜零件依次置于模具内,并对所述模具进行加热,根据插头构件的体积参数确定注胶参数,在所述外壳体、垫座和铜零件构成的区域内进行注胶,以形成橡胶连接件,对注胶完成后的所述模具进行加压,在加压的同时在第一预设时间范围内将所述模具加热升温至125～130℃,并对加热后的所述模具保温第二预设时间。本申请提供的制作方法,解决了相关技术中的水下橡胶连接器的插头构件耐压性能较差而导致在深海作业时安全保障低的问题。(The application relates to a plug component of an underwater rubber connector and a manufacturing method thereof, and relates to the technical field of underwater connection of cables. The manufacturing method comprises the steps of firstly conducting roughening treatment on the surface of a copper part, coating a layer of adhesive on the surface of the copper part after the roughening treatment is finished, then sequentially placing an outer shell, a cushion seat and the copper part in a mold, heating the mold, determining glue injection parameters according to volume parameters of a plug component, injecting glue into an area formed by the outer shell, the cushion seat and the copper part to form a rubber connecting piece, pressurizing the mold after glue injection is finished, heating the mold to 125-130 ℃ within a first preset time range while pressurizing, and keeping the heated mold warm for a second preset time. The manufacturing method solves the problem that the plug component of the underwater rubber connector in the related technology is poor in pressure resistance and low in safety guarantee during deep sea operation.)

1. A method for manufacturing a plug component of an underwater rubber connector is characterized by comprising the following steps:

carrying out roughening treatment on the surface of a copper part (1), and coating a layer of adhesive on the surface of the copper part (1) after the roughening treatment is finished;

sequentially placing the outer shell (2), the cushion seat (3) and the copper part (1) in a mould, and heating the mould;

determining glue injection parameters according to the volume parameters of the plug component, and injecting glue in an area formed by the outer shell (2), the cushion seat (3) and the copper part (1) to form a rubber connecting piece (4);

pressurizing the mold after glue injection, heating the mold to 125-130 ℃ within a first preset time range while pressurizing, and preserving heat of the heated mold for a second preset time.

2. The method for manufacturing the plug component of the underwater rubber connector, according to claim 1, wherein the step of determining the glue injection parameter according to the volume parameter of the plug component comprises the following steps:

if the volume of the plug component is not larger than the first preset volume, the value range of the glue injection pressure is 2000-2500 KG, the value range of the glue injection time is 5-8 min, and the glue injection unit is 13.5-20 g;

if the volume of the plug component is located between the first preset volume and the second preset volume, the value range of the glue injection pressure is 2500-3500 KG, the value range of the glue injection time is 10-18 min, and the glue injection unit is 25-124 g.

3. The method for manufacturing a plug member of an underwater rubber connector as claimed in claim 1, wherein: the mold is heated before glue injection, so that the temperature of the mold reaches 80 ℃, and a heat preservation piece is arranged on the outer side of the mold before glue injection, so that the temperature of the mold can be kept at 80 ℃ in the glue injection process.

4. The method for manufacturing a plug member of an underwater rubber connector as claimed in claim 1, wherein: the mould keeps warm after to the heating after the second preset time, demolish the mould and obtain the shaping the plug component, will the plug component cools off to the normal atmospheric temperature back in the air cushion (3) are kept away from the one end of rubber connecting piece (4) with the regional epoxy glue of injecting that shell body (2) constitute to form tip sealing member (5).

5. The method for manufacturing a plug member of an underwater rubber connector as claimed in claim 4, wherein: and before the epoxy resin glue is injected into the plug component, controlling the air humidity of the environment where the plug component is located to be not more than 60%.

6. The method for manufacturing a plug member of an underwater rubber connector as claimed in claim 1, wherein: the first preset time is 3-5 min, and the second preset time is 45-50 min.

7. The method for manufacturing a plug member of an underwater rubber connector according to claim 1, wherein the roughening treatment is performed on the surface of the copper part (1), and a layer of adhesive is coated on the surface of the copper part (1) after the roughening treatment is finished, and the method comprises the following steps:

spraying fine sand with the diameter not less than 150 meshes on the surface of the copper part (1) to roughen the copper part (1);

after the roughening treatment is finished, cleaning the surface of the workpiece by using acetone;

after the surface of the copper part (1) is dried, coating a layer of the adhesive on the surface of the copper part, and enabling the thickness of the adhesive to be not more than 0.1 mm.

8. A plug member for an underwater rubber connector, comprising:

an outer shell (2) comprising a housing cavity (20);

and from last accept under accept copper part (1), rubber connecting piece (4) and base of a mattress (3) in chamber (20), copper part (1) inlays to be located just at least part stretches out in rubber connecting piece (4), base of a mattress (3) are along keeping away from the direction of rubber connecting piece (4) includes first stair structure (30) and second stair structure (31) in proper order, the diameter of first stair structure (30) with the ratio of the diameter of second stair structure (31) is 2: 1, the ratio of the diameter of the rubber connecting piece (4) to the diameter of the rubber connecting piece (4) is 1: 2.5.

9. a plug member for an underwater rubber connector as claimed in claim 8, wherein: accept still to be provided with tip sealing member (5) in chamber (20), tip sealing member (5) are located base (3) are kept away from the one end of rubber connector (4), tip sealing member (5) are epoxy glue, base (3) are the PEEK material.

10. A plug member for an underwater rubber connector as claimed in claim 8, wherein: the surface of the copper part (1) is sprayed with a coating formed by fine sand with the diameter not less than 150 meshes.

Technical Field

The application relates to the technical field of underwater connection of cables, in particular to a plug component of an underwater rubber connector and a manufacturing method thereof.

Background

With the exploration of human beings on underwater environments such as oceans, lakes and rivers, the demand for adapting to underwater intelligent equipment is gradually increased, the underwater environment has two remarkable characteristics, namely the existence of an aqueous medium everywhere and the corresponding increase of underwater pressure along with the increase of exploration depth, so that the basic requirements on most underwater intelligent equipment are better sealing property and excellent pressure resistance.

In the process of underwater work of the underwater intelligent equipment, a cable is used as a base body for energy source and signal transmission, the cable needs to penetrate out of an equipment cabin, and a watertight connector is needed in the process of penetration. The watertight connector technology is an important component of deep sea technology, and all underwater equipment with electric transmission and signal control cannot be separated from the watertight connector, at present, the watertight connector is widely applied to industries such as marine scientific investigation, marine engineering, rescue and salvage, harbor engineering, water conservancy construction, offshore oil and gas resource development and the like, and has a large potential market and a wide development prospect.

The watertight connector is also called as a watertight connector and can be divided into a dry-plugging and unplugging watertight connector and a wet-plugging and unplugging watertight connector, the technology of the dry-plugging and unplugging connector is relatively easy, the plugging and unplugging operation is finished on land and then the connector is put into water for use. According to the structure, the dry-plug and pull-out watertight connector can be divided into a rubber body watertight connector and a metal shell watertight connector, the rubber body watertight connector generally refers to an electric connector for transmitting electric energy and electric signals, and the metal shell watertight connector can be an electric connector or an optical connector for transmitting optical communication signals. Among the two dry-plug connectors, the rubber watertight electric connector is the watertight connector with the most types of deep submergence vehicles and the widest application range, and is one of the main watertight connector product series with wide application range and reliable performance in the world.

However, the existing rubber body watertight electric connector still has more places which need to be improved, wherein the most prominent one is that the use depth of the existing rubber body watertight electric connector is limited, the use in the existing deep sea environment cannot be met, when part of the existing rubber body watertight electric connector can be used in the deep sea environment, the stability is often poor, leakage is often caused due to insufficient pressure resistance, the seawater with high external water pressure enters the equipment cabin through the connector seriously, and serious safety accidents are caused.

Disclosure of Invention

The embodiment of the application provides a plug component of an underwater rubber connector and a manufacturing method thereof, and aims to solve the problem that safety guarantee is low during deep sea operation due to poor pressure resistance of the plug component of the underwater rubber connector in the related art.

In a first aspect, a method for manufacturing a plug member of an underwater rubber connector is provided, which includes the steps of:

carrying out roughening treatment on the surface of a copper part, and coating a layer of adhesive on the surface of the copper part after the roughening treatment is finished;

sequentially placing the outer shell, the cushion seat and the copper part in a mould, and heating the mould;

determining glue injection parameters according to the volume parameters of the plug component, and injecting glue in an area formed by the outer shell, the cushion seat and the copper part to form a rubber connecting piece;

pressurizing the mold after glue injection, heating the mold to 125-130 ℃ within a first preset time range while pressurizing, and preserving heat of the heated mold for a second preset time.

In some embodiments, the determining the glue injection parameter according to the volume parameter of the plug member includes:

if the volume of the plug component is not larger than the first preset volume, the value range of the glue injection pressure is 2000-2500 KG, the value range of the glue injection time is 5-8 min, and the glue injection unit is 13.5-20 g;

if the volume of the plug component is located between the first preset volume and the second preset volume, the value range of the glue injection pressure is 2500-3500 KG, the value range of the glue injection time is 10-18 min, and the glue injection unit is 25-124 g.

In some embodiments, the mold is heated before glue injection so that the temperature of the mold reaches 80 ℃, and a heat preservation member is arranged on the outer side of the mold before glue injection so that the temperature of the mold can be kept at 80 ℃ in the glue injection process.

In some embodiments, after the heated mold is kept warm for the second preset time, the mold is removed to obtain the molded plug member, the plug member is cooled to normal temperature in air, and then epoxy resin glue is injected into a region formed by one end of the cushion seat away from the rubber connecting piece and the outer shell to form an end sealing element.

In some embodiments, the air humidity of the environment in which the plug member is located is controlled to be no greater than 60% prior to injecting the epoxy glue into the plug member.

In some embodiments, the first predetermined time is 3-5 min, and the second predetermined time is 45-50 min.

In some embodiments, the roughening the surface of the copper part and applying a layer of adhesive to the surface of the copper part after the roughening process is completed includes:

spraying fine sand with the diameter not less than 150 meshes on the surface of the copper part to roughen the copper part;

after the roughening treatment is finished, cleaning the surface of the workpiece by using acetone;

after the surface of the copper part is dried, a layer of the adhesive is coated on the surface of the copper part, and the thickness of the adhesive is not more than 0.1 mm.

In a second aspect, there is provided a plug member of an underwater rubber connector, comprising:

the outer shell comprises an accommodating cavity;

and from last accept extremely down accept copper part, rubber connecting piece and the cushion in the accept intracavity, the copper part inlays to be located just at least part stretches out in the rubber connecting piece, the cushion is along keeping away from the direction of rubber connecting piece includes first stair structure and second stair structure in proper order, the diameter of first stair structure with the ratio of the diameter of second stair structure is 2: 1, the ratio of the diameter of the rubber connecting piece to the diameter of the rubber connecting piece is 1: 2.5.

in some embodiments, an end seal is further disposed in the receiving cavity, the end seal is disposed at an end of the base away from the rubber connector, the end seal is made of epoxy resin glue, and the base is made of PEEK material.

In some embodiments, the surface of the copper part is sprayed with a coating formed by fine sand with the diameter not less than 150 meshes.

The beneficial effect that technical scheme that this application provided brought includes:

the embodiment of the application provides a manufacturing method of a plug component of an underwater rubber connector, wherein specific glue injection parameters are determined according to the volume parameters of the plug component in the manufacturing process, glue injection is performed in an area formed by an outer shell, a cushion seat and a copper part to form a rubber connecting piece, then a mold after glue injection is completed is pressurized, the mold is heated and heated within a first preset time range while being pressurized, the heated mold is kept warm, and the molded plug component can be still in a sealing state even under 70Mpa or deeper water through control of the parameters during the process of facing, so that the plug component has excellent compression resistance and sealing performance, and the overall working performance of the underwater rubber connector is ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a plug member of an underwater rubber connector provided in an embodiment of the present application.

In the figure: 1-copper part, 2-outer shell, 20-containing cavity, 3-cushion seat, 30-first step structure, 31-second step structure, 4-rubber connecting piece and 5-end sealing piece.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a manufacturing method of a plug component of an underwater rubber connector, which can solve the problem that the plug component of the underwater rubber connector in the related art is poor in pressure resistance and low in safety guarantee during deep sea operation.

The manufacturing method of the plug component mainly comprises the following manufacturing steps:

carrying out roughening treatment on the surface of the copper part 1, and coating a layer of adhesive on the surface of the copper part 1 after the roughening treatment is finished;

sequentially placing the outer shell 2, the cushion seat 3 and the copper part 1 in a mould, and heating the mould;

determining glue injection parameters according to the volume parameters of the plug component, and injecting glue in an area formed by the outer shell 2, the cushion base 3 and the copper part 1 to form a rubber connecting piece 4;

pressurizing the mold after the glue injection is finished, heating the mold to 125-130 ℃ within a first preset time range while pressurizing, and preserving the heat of the heated mold for a second preset time.

Specifically, in order to ensure the overall sealing performance of the plug member, besides the roughening treatment of the surface of the copper part 1, the roughening treatment of the inner wall of the outer shell 2, which needs to be subjected to glue injection, is also needed, the process is similar to the roughening treatment of the surface of the copper part 1, and after the roughening treatment is finished, a layer of adhesive is also needed to be coated on the surface of the inner wall, so that the tight connection between the rubber connecting piece 4 formed after glue injection and the outer shell 2 is ensured, and the sealing performance is ensured.

Furthermore, because the plug component has a plurality of different models for adapting to different products, the size of the glue injection area formed by the outer shell 2, the pad 3 and the copper part 1 of the plug component with different models is different, and the required glue injection amount is also different. And to the injecting glue region of variation in size, need adopt suitable notes pressure of watering, if injecting glue pressure undersize, then breach and bubble appear easily among the injecting glue process, if injecting glue pressure is too big, then can directly lead to the density of product too high, can't take out smoothly in the mould, produce and take out the damage, even lead to certain degree destruction to the mould, still probably in addition because the too high inside can advance gluey of other parts of product of pressure messenger, lead to the product unqualified. Therefore, the concrete steps of determining the glue injection parameter according to the volume parameter of the plug component comprise: if the volume of the plug component is not larger than the first preset volume, the value range of the glue injection pressure is 2000-2500 KG, the value range of the glue injection time is 5-8 min, and the glue injection unit is 13.5-20 g; if the volume of the plug component is located between the first preset volume and the second preset volume, the value range of the glue injection pressure is 2500-3500 KG, the value range of the glue injection time is 10-18 min, and the glue injection unit is 25-124 g. Wherein the value range of the first preset volume is 9.2-21 cm³The value range of the second preset volume is 31.5-71.3 cm³。

Further, the mold is heated before glue injection, so that the temperature of the mold reaches 80 ℃, and a heat-insulating piece is arranged on the outer side of the mold before glue injection, so that the temperature of the mold can be kept at 80 ℃ in the glue injection process. Specifically, before injecting glue, in order to guarantee that the colloid has better mobility and guarantee the quality of injecting glue, all heat mould and other parts that contact with the colloid, the temperature of heating is preferred to be 80 ℃ to can fluctuate 5 ℃ from top to bottom to guarantee that the colloid can not be because the temperature is too low and can't inject into the mould smoothly inside, also can not because the temperature of mould and part is too high, and the colloid mobility exists the inside risk of getting into the part behind too strong, leads to the product unqualified.

Specifically, in the process of heating and insulating the mold and the part, the colloid is placed in an oven to be dried for about 3 minutes, the colloid is softened, then the colloid is injected into a special glue injection barrel, wherein different glue injection amounts correspond to glue injection barrels with different sizes, and after the glue injection is finished, glue injection is started into the mold. The glue outlet of the glue injection cylinder is aligned to the glue injection opening of the mold, the glue injection cylinder is pushed by the pressure of the injection press, and the glue smoothly enters the mold due to good fluidity at a proper temperature to realize glue injection, and in the whole glue injection process, the heat insulation piece continuously provides heat for the mold, so that the temperature of the heat insulation piece can be kept at about 80 ℃ all the time, and the glue injection quality is ensured.

Further, after glue injection is completed, the mold with the glue injection completed is rapidly carried to a flat vulcanizing machine, a machine plane is utilized, the mold plane is pressed, the mold is clamped and continuously heated, the temperature of the mold is stably increased to 125-130 ℃ within a first preset time, the heated mold is kept warm for a second preset time, continuous vulcanization of the mold on the machine is guaranteed, at the moment, parts and colloid inside the mold are chemically reacted due to long-time high temperature and high pressure, the formed colloid becomes a rubber connecting piece 4, and the rubber connecting piece can be firmly bonded with metal parts welded with cables.

Further, the value range of the first preset time is 3-5 min, the value range of the second preset time is 45-50 min, the heating temperature and the heat preservation time in the vulcanization process have important influences on the pressure resistance, the vulcanization performance and the like of the molded rubber connecting piece 4, and on the basis, a plurality of groups of experiments are carried out, wherein the experiment results are as follows:

after the glue injection is finished, if the mold is heated after continuously transmitting the temperature of 100 ℃, the experimental result shows that no matter how long the mold is kept warm, the rubber is completely not subjected to a vulcanization reaction, the adhesive is not reacted, and the pressure of 70mPa cannot be realized.

After the glue injection is finished, if the mold is heated after continuously transmitting the temperature of 110 ℃, if the temperature is kept for 20 minutes, the rubber is completely not subjected to a vulcanization reaction, the adhesive is not reacted, and 70mPa can not be pressed; when the heat preservation time is increased to 30-45 minutes, partial rubber starts to be vulcanized, the rubber can be completely vulcanized for a product with a small volume, but the rubber is not sufficiently vulcanized for a product with a large volume, and in addition, the adhesive also starts to generate a chemical reaction, but the chemical reaction is insufficient, so that 70mPa can not be pressed; when the holding time was increased to 60 minutes, it was shown that the vulcanization of the rubber was completed regardless of the volume of the product, but the chemical reaction of the adhesive was still insufficient and 70mPa could not be pressed.

After the glue injection is finished, if the mold is heated after the temperature of 120 ℃ is continuously transmitted, the heat preservation time is controlled to be 30-45 minutes, the rubber can be vulcanized at the moment, the adhesive can also generate chemical reaction, the pressure is 70mPa, and the cracking between the rubber connecting piece 4 and the outer shell 2 within 24 hours is shown.

After the glue injection is finished, if the mold is heated for continuously transferring the temperature of 125 ℃, the heat preservation time is controlled to be 30-45 minutes, the rubber can be vulcanized at the moment, the adhesive can also generate chemical reaction, the pressure is 70mPa, and the cracking between most of the rubber connecting pieces 4 and the outer shell 2 within 24 hours is shown. After the heat preservation time is prolonged to 45-55 minutes, the rubber can be vulcanized, the adhesive can also generate chemical reaction, the pressure is 70mPa, and the 24-hour cracking between the rubber connecting piece 4 and the outer shell 2 is basically avoided. After the heat preservation time is further prolonged to 60 minutes, the rubber is excessively vulcanized, the product is burnt integrally, the appearance quality of the product is affected to a great extent, the pressure is 70mPa, and the 24-hour cracking between the rubber connecting piece 4 and the outer shell 2 is basically avoided.

After the glue injection is finished, if the mold is heated for continuously transferring the temperature of 130 ℃, the heat preservation time is controlled to be 30-40 minutes, the rubber can be vulcanized at the moment, the adhesive can also generate chemical reaction, the pressure is 70mPa, and the cracking between most of the rubber connecting pieces 4 and the outer shell 2 within 24 hours is shown. After the heat preservation time is prolonged to 40-50 minutes, the rubber can be vulcanized, the adhesives can also generate chemical reaction, the pressure is 70mPa, and the 24-hour cracking between the rubber connecting piece 4 and the outer shell 2 is basically avoided. After the heat preservation time is further prolonged to 50-55 minutes, the problem of excessive vulcanization of rubber occurs, the product is burnt integrally, the appearance quality of the product is affected to a great extent, 70mPa is pressed, and the 24-hour cracking between the rubber connecting piece 4 and the outer shell 2 is basically avoided.

Therefore, the heating proper temperature range of the mold is 125-130 ℃, the proper heat preservation time range is 45-50 minutes, the parameters can well ensure that the rubber can be completely vulcanized, excessive vulcanization can not occur, the adhesive can also ensure that the adhesive can completely realize chemical reaction, cracking can not occur within 24 hours between the rubber connecting piece 4 and the outer shell 2 under the underwater pressure environment with 70mPa or even higher pressure, and the pressure resistance and the sealing performance are good.

Further, after the heated mold is kept warm for a second preset time, the mold is removed to obtain a molded plug member, the plug member is cooled to normal temperature in air, and epoxy resin glue is injected into a region formed by one end of the cushion base 3, which is far away from the rubber connecting piece 4, and the outer shell 2 to form the end sealing piece 5. The end seal 5 can be used together with the shoe 3 and the rubber connector 4 to ensure the pressure resistance and sealing performance of the product.

Furthermore, before the epoxy resin glue is injected into the plug component, the air humidity of the environment where the plug component is located is controlled to be not more than 60%. Specifically, if the air humidity is not less than 60%, the resin solidification time will be prolonged, and micro bubbles will appear, and if bubbles appear, the product needs to be vacuumed by a vacuum device, so that the process of breaking the resin bubbles of the product has a certain influence on the performance of the end seal 5.

Further, the method comprises the following steps of carrying out roughening treatment on the surface of the copper part 1, and coating a layer of adhesive on the surface of the copper part 1 after the roughening treatment is finished, wherein the method specifically comprises the following steps:

spraying fine sand with the diameter not less than 150 meshes on the surface of the copper part 1 to roughen the copper part 1;

after the roughening treatment is finished, cleaning the surface of the workpiece by using acetone;

after the surface of the copper part 1 is dried, a layer of adhesive is coated on the surface thereof so that the thickness of the adhesive is not more than 0.1 mm.

Specifically, after cleaning with acetone, the copper part 1 needs to be placed in an oven to be dried at 80 ℃ for 10 minutes, after the surface of the copper part 1 is dried, a layer of adhesive is coated on the surface, and then the copper part is placed in the oven to be dried at 80 ℃ for 20 minutes.

The application still provides a plug component of rubber connector under water, refer to fig. 1 and show, it includes shell body 2, and shell body 2 includes one and accepts chamber 20, still include from last to accepting copper part 1 in accepting chamber 20 down, rubber connector 4 and base 3, copper part 1 inlays and locates in rubber connector 4 and at least part stretches out rubber connector 4, base 3 includes first stair structure 30 and second stair structure 31 along the direction of keeping away from rubber connector 4 in proper order, the ratio of the diameter of first stair structure 30 and the diameter of second stair structure 31 is 2: 1, the ratio of the diameter of the rubber connecting piece 4 is 1: 2.5.

specifically, shell body 2 adopts stainless steel, and it mainly plays protecting sheathing's effect, and the chamber 20 of acceping of shell body 2 is interior from last to including copper part 1, rubber connector 4 and base 3 down, and the heart yearn of cable meets through passing base 3, the terminal portion of burying underground in rubber connector 4 with copper part 1 behind the rubber connector 4 in proper order to be used for the transmission of signal. The first step structure 30 is used for assisting the rubber connecting piece 4 to jointly realize sealing, and the second step structure 31 is used for playing a supporting role and ensuring the pressure resistance and the sealing performance of the end part.

Further, still be provided with tip sealing member 5 in acceping the chamber 20, tip sealing member 5 locates the one end that the base 3 kept away from rubber connector 4, and tip sealing member 5 is epoxy glue, and base 3 is the PEEK material.

Further, the surface of the copper part 1 is sprayed with a coating layer formed of fine sand having a diameter of not less than 150 mesh, preferably, 200 mesh. In order to ensure the overall sealing performance of the plug component, besides the roughening treatment of the surface of the copper part 1, the roughening treatment of the inner wall of the outer shell 2, which needs to be subjected to glue injection, is also needed, the process is similar to the roughening treatment of the surface of the copper part 1, and after the roughening treatment is finished, a layer of adhesive is also needed to be coated on the surface of the inner wall, so that the tight connection between the rubber connecting piece 4 formed after glue injection and the outer shell 2 is ensured, and the sealing performance is ensured.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.