Nut shielding device applied to electrolytic polishing and passivation process and use method

Abstract

The invention discloses a nut shielding device applied to an electrolytic polishing and passivation process and a use method, and aims to provide a nut shielding device which can effectively improve the working efficiency of shielding a silver-plated nut; according to the nut shielding device applied to the electrolytic polishing and passivation process and the using method, the shielding effect on a silver coating is good, and therefore the product yield of a silver-plated nut in the electrolytic polishing and passivation process is increased. The nut shielding device applied to the electrolytic polishing and passivation process comprises a plug and a sealing gasket. The plug comprises a stud and an operation head arranged at one end of the stud, an annular clamping groove is formed in the other end face of the stud, the end, close to the operation head, of the stud is sleeved with an annular sealing piece, and the sealing gasket is clamped in the annular clamping groove and is in interference fit with the annular clamping groove.

Description

Technical Field

[0001] The invention relates to a shielding device used in an electrolytic polishing and passivation process for a silver-plated nut, and in particular to a nut shielding device used in an electrolytic polishing and passivation process and a use method thereof. Background Art

[0002] In order to improve the convenience of use and solve the problem of seizure between stainless steel nuts and joints, the current VCR joints generally adopt a silver plating process on the inner threads of the nuts to form a silver plating layer on the inner threads of the nuts. In the electrolytic polishing and passivation process of the silver-plated nuts, silver easily reacts with the electrolyte in the electrolytic polishing process and the passivation liquid in the passivation process, resulting in loss of performance (loss of performance to solve the problem of seizure between stainless steel nuts and joints) and affecting the appearance quality.

[0003] In order to solve the above problems, currently, a layer of glue is generally applied on the inner thread of the silver-plated nut to cover the silver-plated layer; however, it has the following disadvantages: Firstly, the glue brushing operation takes a long time and has low efficiency, and it is difficult to ensure that the glue completely covers the silver-plated layer on the internal thread. The masking effect is poor, which can easily lead to defective products.

[0004] Secondly, during the electrolytic polishing process, due to the increase in product temperature and the influence of the electrolyte, the edge of the glue will fall off, causing the silver-plated layer on the edge of the inner thread of the silver-plated nut to be corroded by the liquid, affecting product performance and resulting in product defects. If the glue leaks during the electropolishing process, the subsequent passivation will still corrode the silver-plated layer, causing secondary damage and resulting in product defects. Summary of the invention

[0005] The purpose of the present invention is to provide a nut shielding device and a method of use used in the electrolytic polishing and passivation process, which can not only effectively improve the operating efficiency of shielding silver-plated nuts, but also has a good shielding effect on the silver-plated layer, and can effectively solve the problem of defective products caused by the silver-plated layer being corroded by chemicals during the electrolytic polishing and passivation processes of the silver-plated nuts, thereby improving the product yield of the silver-plated nuts in the electrolytic polishing and passivation processes.

[0006] The technical solution of the present invention is: A nut shielding device used in electrolytic polishing and passivation processes includes a plug and a sealing gasket. The plug includes an operating head arranged at one end of the stud, and an annular groove is arranged on the other end face of the stud. An annular seal is sleeved on one end of the stud near the operating head. The sealing gasket is clamped in the annular groove, and the sealing gasket and the annular groove have an interference fit. The specific use of the nut shielding device of this scheme is as follows: The plug is installed on the silver-plated nut of the VCR joint. The VCR joint includes a pipe and a silver-plated nut connected to one end of the pipe. The plug is connected to the silver-plated nut through a stud by threads and the plug is tightened, so that the annular seal is pressed between the operating head and one end of the silver-plated nut, the sealing gasket at the end of the stud is pressed tightly against the end of the pipe, and the pipe is close to the inner end surface of the silver-plated nut; thereby, a first seal is formed between the operating head and one end of the silver-plated nut through the annular seal, a second seal is formed between the end of the stud and the end of the pipe through the sealing gasket, and a third seal is formed between the pipe and the inner end surface of the silver-plated nut; thereby, the silver-plated layer on the inner thread of the silver-plated nut is completely shielded, and the shielding effect and stability are good. In addition, in actual use, it is only necessary to tighten the plug onto the silver-plated nut through the stud, so it is not only easy to operate, but can also effectively improve the efficiency of shielding the silver-plated nuts; it also has a good shielding effect on the silver-plated layer, and can effectively solve the problem of defective products caused by the silver-plated layer being corroded by the chemical solution during the electrolytic polishing and passivation process of the silver-plated nuts, thereby improving the product yield of the silver-plated nuts in the electrolytic polishing and passivation process.

[0007] As a preference, it also includes: A mounting groove is arranged at the other end of the stud, which connects the outer side wall of the stud and the annular groove; The swinging member is rotatably arranged in the mounting groove and comprises a stop rod and a pressure rod; An elastic member, providing elastic force to drive the stopper rod of the swing member to rotate toward the outside of the stud; When the sealing gasket is clamped in the annular clamping groove, the sealing gasket abuts against the pressure rod and enables the swinging member to be completely accommodated in the installation groove; When the sealing gasket is separated from the annular groove, the end of the barrier rod rotates to the outside of the stud under the action of the elastic member. Although the sealing gasket and the annular groove have an interference fit, the sealing gasket may fall off from the annular groove or even be missing during actual use; and after the plug is tightened on the silver-plated nut, the sealing gasket is located inside the silver-plated nut. Therefore, after the plug is tightened on the silver-plated nut, it is impossible to determine by naked eye whether the sealing gasket is installed in the annular groove. This leads to the problem that after the nut shielding device is installed on the silver-plated nut, the sealing gasket may be missing and cannot be identified. Once the sealing gasket is missing, during the electrolytic polishing and passivation process of the silver-plated nut, the electrolyte and passivation liquid will enter the internal thread of the silver-plated nut through the space between the end of the stud and the end of the pipe, corrode the silver plating layer, affect product performance, and cause product defects. In order to solve this problem, the present scheme improves the nut shielding device. Specifically, Before the plug is installed on the silver-plated nut, if the sealing gasket falls off from the annular groove or the sealing gasket is missing, the driving pendulum will rotate the stopper rod to the outside of the stud under the action of the elastic member, and rotate the end of the stopper rod to the outside of the stud to prevent the stud of the plug from being installed on the silver-plated nut; at this time, the stud will not be able to be screwed into the silver-plated nut due to the obstruction of the stopper rod located on the outside of the stud; thereby reminding and forcing the operator to clamp the sealing gasket in the annular groove and then install the plug. When the sealing gasket is clamped in the annular groove, the sealing gasket rests on the pressure rod and allows the swinging member to be completely contained in the installation groove; at this time, the normal installation of the plug will not be affected. Based on this, the nut shielding device of this scheme can effectively solve the problem that due to the missing installation of the sealing gasket, during the electrolytic polishing and passivation process of the silver-plated nut, the electrolyte and the passivation liquid will enter the inner thread of the silver-plated nut through the end of the stud and the end of the pipe, corrode the silver plating layer, affect the product performance, and cause product defects without affecting its normal use.

[0008] Preferably, a stopper is provided on the inner side wall of the installation groove, and the elastic member provides elastic force to drive the stopper of the swing member to rotate to the outside of the stud and abut against the stopper, at which time, the end of the stopper rotates to the outside of the stud under the action of the elastic member. This is convenient for actual processing and manufacturing.

[0009] Preferably, the blocking rod and the pressure rod are L-shaped.

[0010] Preferably, the elastic member is a torsion spring or a compression spring.

[0011] Preferably, the sealing gasket includes a hard annular bottom plate and a rubber gasket fixed on the annular bottom plate, the annular bottom plate is closely against the bottom surface of the annular groove, the annular bottom plate is against the pressure rod, and the rubber gasket is interference fit with the annular groove. In this way, after the sealing gasket is clamped in the annular groove, the annular bottom plate can be against the pressure rod to drive the swinging member to rotate, so as to ensure that the swinging member is completely accommodated in the installation groove.

[0012] Preferably, the annular sealing member is a sealing ring or a sealing gasket.

[0013] Preferably, an axial through hole is provided in the stud, and the axial through hole passes through the stud and the operating head. In this way, during the electrolytic polishing and passivation process, the electrolyte and the passivation liquid can circulate in the connecting pipe through the inner hole of the connecting pipe and the axial through hole, thereby polishing and passivating the inner hole of the connecting pipe.

[0014] Preferably, the plug is made of Teflon, so that the properties of Teflon material such as high temperature resistance, acid and alkali resistance, corrosion resistance, and non-deformation resistance can be utilized to ensure the stability of the plug in the electrolytic polishing and passivation process and extend the service life of the plug.

[0015] A method for using a nut shielding device used in an electrolytic polishing and passivation process comprises the following steps in sequence: The plug is installed on the silver-plated nut of the VCR joint. The VCR joint includes a pipe and a silver-plated nut connected to one end of the pipe. The plug is connected to the silver-plated nut through a stud by threading and the plug is tightened, so that the annular seal is pressed between the operating head and one end of the silver-plated nut, the sealing gasket at the end of the stud is pressed tightly against the end of the pipe, and the pipe is close to the inner end face of the silver-plated nut. Based on this, the first seal can be formed between the operating head and one end of the silver-plated nut by the annular seal, the second seal can be formed between the end of the stud and the end of the pipe by the sealing gasket, and the third seal can be formed between the pipe and the inner end face of the silver-plated nut; thereby, the silver-plated layer on the inner thread of the silver-plated nut is completely shielded, and the shielding effect and stability are good. In addition, in actual use, it is only necessary to tighten the plug onto the silver-plated nut through the stud, so it is not only easy to operate, but can also effectively improve the efficiency of shielding the silver-plated nuts; it also has a good shielding effect on the silver-plated layer, and can effectively solve the problem of defective products caused by the silver-plated layer being corroded by the chemical solution during the electrolytic polishing and passivation process of the silver-plated nuts, thereby improving the product yield of the silver-plated nuts in the electrolytic polishing and passivation process.

[0016] The beneficial effects of the present invention are: it can not only effectively improve the operating efficiency of shielding the silver-plated nuts; but also has a good shielding effect on the silver-plated layer, and can effectively solve the problem of defective products caused by the silver-plated layer being corroded by the chemical solution during the electrolytic polishing and passivation process of the silver-plated nuts, thereby improving the product yield of the silver-plated nuts in the electrolytic polishing and passivation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the nut shielding device used in the electrolytic polishing and passivation process of the present invention during actual application.

[0018] Figure 2 It is a cross-sectional structural schematic diagram of a nut shielding device used in the electrolytic polishing and passivation process of the present invention.

[0019] Figure 3 It is a schematic cross-sectional structure diagram of the nut shielding device used in the electrolytic polishing and passivation process of the present invention during actual application.

[0020] In the figure: Plug 1, operating head 1.1, stud 1.2, annular groove 1.3, axial through hole 1.4; Annular seal 2; Sealing gasket 3, rubber gasket 3.1, annular bottom plate 3.2; Swinging member 4, stop rod 4.1, pressure rod 4.2; Mounting slot 5, stopper receiving opening 5.1; Limiting member 6; Silver plated nut 7; Take over 8. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Specific embodiment 1, as Figure 1 , Figure 2 , Figure 3 As shown, a nut shielding device used in an electrolytic polishing and passivation process includes a plug 1 and a sealing gasket 3. The plug 1 includes a stud 1.2 and an operating head 1.1 arranged at one end of the stud 1.2. The operating head 1.1 is an inner hexagonal operating head 1.1 or an outer hexagonal operating head 1.1. Of course, the operating head 1.1 can also be other outer polygonal operating heads 1.1, for example, a pentagonal operating head 1.1 or a quadrilateral operating head 1.1. The edge of the operating head 1.1 extends to the outside of the stud 1.2. An annular groove 1.3 is provided on the other end face of the stud 1.2. An annular seal 2 is sleeved on one end of the stud 1.2 against the operating head 1.1. The sealing gasket 3 is clamped in the annular groove 1.3, and the sealing gasket 3 is interference fit with the annular groove 1.3.

[0022] The specific use of the nut shielding device of this embodiment is as follows: The plug 1 is installed on the silver-plated nut 7 of the VCR joint. The VCR joint includes a pipe 8 and a silver-plated nut 7 connected to one end of the pipe 8. The plug 1 is threadedly connected to the silver-plated nut 7 through the stud 1.2 and the plug 1 is tightened, so that the annular seal 2 is pressed between the operating head 1.1 and one end of the silver-plated nut 7, and the sealing gasket 3 at the end of the stud 1.2 is pressed tightly against the end of the pipe 8, and the pipe 8 is close to the inner end face of the silver-plated nut 7; thereby, the first seal is formed between the operating head 1.1 and one end of the silver-plated nut 7 through the annular seal 2, the second seal is formed between the end of the stud 1.2 and the end of the pipe 8 through the sealing gasket 3, and the third seal is formed between the pipe 8 and the inner end face of the silver-plated nut 7; thereby, the silver-plated layer on the inner thread of the silver-plated nut 7 is completely shielded, and the shielding effect and stability are good. In addition, in actual use, it is only necessary to tighten the plug 1 on the silver-plated nut 7 through the stud 1.2. Therefore, the nut shielding device of this embodiment is not only easy to operate, but can also effectively improve the efficiency of shielding the silver-plated nuts 7; it also has a good shielding effect on the silver-plated layer, and can effectively solve the problem of defective products caused by the silver-plated layer being corroded by the chemical solution during the electrolytic polishing and passivation process of the silver-plated nuts 7, thereby improving the product yield of the silver-plated nuts 7 in the electrolytic polishing and passivation process.

[0023] Furthermore, the plug 1 is made of Teflon, which can ensure the stability of the plug 1 in the electrolytic polishing and passivation process and extend the service life of the plug 1 by utilizing the properties of Teflon material such as high temperature resistance, acid and alkali resistance, corrosion resistance, and non-deformation resistance.

[0024] Of course, it should be noted that the material of the plug 1 is Teflon, which is only a preferred solution of this embodiment. In actual production, the plug 1 can be made of other materials as needed, for example, other plastics, polyethylene (PE) or polypropylene (PP) or polyvinyl chloride (PVC) or polystyrene (PS) or acrylonitrile-butadiene-styrene copolymer (ABS) or PPS (polyphenylene sulfide) or PPO (polyphenylene oxide) or PA (nylon or polyamide) or PC (polycarbonate) or POM (polyoxymethylene or polyoxymethylene), etc. Of course, the plug 1 can also be made of metal materials.

[0025] Further, the annular seal 2 is a sealing ring or a sealing gasket. In this embodiment, the annular seal 2 is a sealing ring, and the sealing ring is tightly held on the stud 1.2. In this way, the sealing ring can be effectively prevented from falling off.

[0026] In this embodiment, the end of the stud 1.2 close to the operating head 1.1 has a polished rod section, and the sealing ring is sleeved on the polished rod section, and the sealing ring is tightly held on the polished rod section. In this way, the sealing ring can be effectively prevented from falling off.

[0027] Furthermore, an axial through hole 1.4 is provided in the stud 1.2, and the axial through hole 1.4 passes through the stud 1.2 and the operating head 1.1. In this way, during the electrolytic polishing and passivation process, the electrolyte and the passivation liquid can circulate in the connecting pipe 8 through the inner hole of the connecting pipe 8 and the axial through hole 1.4, so as to polish and passivate the inner hole of the connecting pipe 8.

[0028] Specific embodiment 2, as Figure 1 , Figure 2 , Figure 3 As shown, a nut shielding device used in an electrolytic polishing and passivation process includes a plug 1, a sealing gasket 3, a mounting groove 5, a swinging member 4 and an elastic member.

[0029] The plug 1 includes a stud 1.2 and an operating head 1.1 arranged at one end of the stud 1.2. The operating head 1.1 is an inner hexagonal operating head 1.1 or an outer hexagonal operating head 1.1. Of course, the operating head 1.1 can also be other outer polygonal operating heads 1.1, for example, a pentagonal operating head 1.1 or a quadrilateral operating head 1.1, etc. The edge of the operating head 1.1 extends to the outside of the stud 1.2. An annular groove 1.3 is provided on the other end face of the stud 1.2. An annular seal 2 is sleeved on one end of the stud 1.2 near the operating head 1.1, and the sealing gasket 3 is clamped in the annular groove 1.3, and the sealing gasket 3 is interference fit with the annular groove 1.3.

[0030] The mounting groove 5 is arranged at the other end of the stud 1.2. The mounting groove 5 and the annular groove 1.3 are located at the same end of the stud 1.2. The mounting groove 5 connects the outer wall of the stud 1.2 and the annular groove 1.3. The swing member 4 is arranged in the mounting groove 5 by rotating the shaft. The swing member 4 includes a stopper 4.1 and a pressure rod 4.2. The elastic member provides elastic force to drive the stopper 4.1 of the swing member 4 to rotate toward the outside of the stud 1.2.

[0031] When the sealing gasket 3 is clamped in the annular clamping groove 1.3, the sealing gasket 3 abuts against the pressure rod 4.2 and causes the swing member 4 to rotate into the mounting groove 5, so that the swing member 4 is completely accommodated in the mounting groove 5.

[0032] When the sealing gasket 3 is separated from the annular groove 1.3, the end of the blocking rod 4.1 rotates to the outside of the stud 1.2 under the action of the elastic member.

[0033] The swing member 4 is one or more, specifically, In one embodiment, there is only one swinging member 4 , and the mounting grooves 5 correspond to the swinging members 4 one by one.

[0034] In another embodiment, there are multiple swing members 4, for example, two, three or four swing members 4, and the multiple swing members 4 are evenly distributed around the circumference of the stud 1.2. The mounting grooves 5 correspond one to one with the swing members 4. The swing members 4 are rotatably arranged in the corresponding mounting grooves 5 through the shaft.

[0035] The specific use of the nut shielding device of this embodiment is as follows: The plug 1 is installed on the silver-plated nut 7 of the VCR joint. The VCR joint includes a pipe 8 and a silver-plated nut 7 connected to one end of the pipe 8. The plug 1 is threadedly connected to the silver-plated nut 7 through the stud 1.2 and the plug 1 is tightened, so that the annular seal 2 is pressed between the operating head 1.1 and one end of the silver-plated nut 7, and the sealing gasket 3 at the end of the stud 1.2 is pressed tightly against the end of the pipe 8, and the pipe 8 is close to the inner end face of the silver-plated nut 7; thereby, the first seal is formed between the operating head 1.1 and one end of the silver-plated nut 7 through the annular seal 2, the second seal is formed between the end of the stud 1.2 and the end of the pipe 8 through the sealing gasket 3, and the third seal is formed between the pipe 8 and the inner end face of the silver-plated nut 7; thereby, the silver-plated layer on the inner thread of the silver-plated nut 7 is completely shielded, and the shielding effect and stability are good. In addition, in actual use, it is only necessary to tighten the plug 1 on the silver-plated nut 7 through the stud 1.2. Therefore, the nut shielding device of this embodiment is not only easy to operate, but can also effectively improve the efficiency of shielding the silver-plated nuts 7; it also has a good shielding effect on the silver-plated layer, and can effectively solve the problem of defective products caused by the silver-plated layer being corroded by the chemical solution during the electrolytic polishing and passivation process of the silver-plated nuts 7, thereby improving the product yield of the silver-plated nuts 7 in the electrolytic polishing and passivation process.

[0036] On the other hand, in the nut shielding device of the present embodiment, although the sealing gasket 3 and the annular groove 1.3 are interference fit, the sealing gasket 3 may fall off from the annular groove 1.3 or even be missing during actual use; and after the plug 1 is tightened on the silver-plated nut 7, the sealing gasket 3 is located inside the silver-plated nut 7. Therefore, after the plug 1 is tightened on the silver-plated nut 7, it is impossible to determine by naked eye whether the sealing gasket 3 is installed in the annular groove 1.3. This leads to the problem that after the nut shielding device is installed on the silver-plated nut 7, the sealing gasket 3 may be missing and cannot be identified. Once the sealing gasket 3 is missing, during the electrolytic polishing and passivation process of the silver-plated nut 7, the electrolyte and the passivation liquid will enter the internal thread of the silver-plated nut 7 through the end of the stud 1.2 and the end of the connecting pipe 8, corrode the silver plating layer, affect the product performance, and cause product defects. In order to solve this problem, the nut shielding device is improved in the present embodiment. Specifically, Before the plug 1 is installed on the silver-plated nut 7, if the sealing gasket 3 falls off from the annular groove 1.3 or the sealing gasket 3 is missing, the driving pendulum will rotate the stopper rod 4.1 to the outside of the stud 1.2 under the action of the elastic member, and rotate the end of the stopper rod 4.1 to the outside of the stud 1.2 to prevent the stud 1.2 of the plug 1 from being installed on the silver-plated nut 7; at this time, the stud 1.2 will not be able to be screwed into the silver-plated nut 7 due to the obstruction of the stopper rod 4.1 located outside the stud 1.2; thereby reminding and forcing the operator to clamp the sealing gasket 3 in the annular groove 1.3 and then install the plug 1. When the sealing gasket 3 is clamped in the annular groove 1.3, the sealing gasket 3 abuts against the pressure rod 4.2 and the swing member 4 is completely contained in the installation groove 5; at this time, the normal installation of the plug 1 will not be affected. Based on this, the nut shielding device of this embodiment can effectively solve the problem that due to the missing installation of the sealing gasket 3, during the electrolytic polishing and passivation process of the silver-plated nut 7, the electrolyte and the passivation liquid will enter the internal thread of the silver-plated nut 7 through the end of the stud 1.2 and the end of the connecting pipe 8, corrode the silver-plated layer, affect product performance, and cause product defects without affecting its normal use.

[0037] In this embodiment, Figure 2 As shown, a portion of the mounting groove 5 extends into the bottom surface of the annular groove 1.3, and a stopper rod receiving opening 5.1 is formed at the bottom surface of the annular groove 1.3. When the sealing gasket 3 is clamped in the annular groove 1.3, the sealing gasket 3 abuts against the pressure rod 4.2 and causes the swing member 4 to rotate into the mounting groove 5. At this time, the end of the pressure rod 4.2 is located at the stopper rod receiving opening 5.1, and the swing member 4 is completely accommodated in the mounting groove 5.

[0038] Further, such as Figure 2As shown, a stopper 6 is provided on the inner side wall of the mounting groove 5. The elastic member provides elastic force to drive the stopper 4.1 of the swing member 4 to rotate toward the outside of the stud 1.2 and abut against the stopper 6. When the stopper 4.1 abuts against the stopper 6, the end of the stopper 4.1 rotates to the outside of the stud 1.2 under the action of the elastic member. In this way, it is convenient for actual processing and manufacturing.

[0039] Further, such as Figure 2 As shown, the blocking rod 4.1 and the pressing rod 4.2 are L-shaped. In this embodiment, the blocking rod 4.1 and the pressing rod 4.2 are an integrally formed structure. The shaft rod is arranged at the intersection of the blocking rod 4.1 and the pressing rod 4.2.

[0040] Furthermore, the elastic member is a torsion spring or a compression spring.

[0041] In one embodiment, the elastic member is a torsion spring, which is sleeved on the shaft, with one end of the torsion spring resting on the inner wall of the mounting groove 5 and the other end of the torsion spring resting on the swing member 4; so that the stop rod 4.1 of the swing member 4 rotates toward the outside of the stud 1.2 under the action of the torsion spring and rests on the limit member 6.

[0042] In one embodiment, the elastic member is a compression spring, one end of which is against the inner wall of the mounting groove 5, and the other end of the compression spring is against the pressure rod 4.2; so that the stop rod 4.1 of the swing member 4 rotates toward the outside of the stud 1.2 under the action of the torsion spring and abuts against the limit member 6.

[0043] Further, such as Figure 2 As shown, the sealing gasket 3 includes a hard annular bottom plate 3.2 and a rubber gasket 3.1 fixed on the annular bottom plate 3.2, the annular bottom plate 3.2 is close to the bottom surface of the annular groove 1.3, the annular bottom plate 3.2 is against the pressure rod 4.2, and the rubber gasket 3.1 is interference fit with the annular groove 1.3. In this way, after the sealing gasket 3 is clamped in the annular groove 1.3, the annular bottom plate 3.2 can be against the pressure rod 4.2 to drive the swing member 4 to rotate, so as to ensure that the swing member 4 is completely accommodated in the installation groove 5.

[0044] Of course, the sealing gasket 3 can also be directly composed of the rubber gasket 3.1.

[0045] Furthermore, the plug 1 is made of Teflon, which can ensure the stability of the plug 1 in the electrolytic polishing and passivation process and extend the service life of the plug 1 by utilizing the properties of Teflon material such as high temperature resistance, acid and alkali resistance, corrosion resistance, and non-deformation resistance.

[0046] Of course, it should be noted that the material of the plug 1 is Teflon, which is only a preferred solution of this embodiment. In actual production, the plug 1 can be made of other materials as needed, for example, other plastics, polyethylene (PE) or polypropylene (PP) or polyvinyl chloride (PVC) or polystyrene (PS) or acrylonitrile-butadiene-styrene copolymer (ABS) or PPS (polyphenylene sulfide) or PPO (polyphenylene oxide) or PA (nylon or polyamide) or PC (polycarbonate) or POM (polyoxymethylene or polyoxymethylene), etc. Of course, the plug 1 can also be made of metal materials.

[0047] Further, the annular seal 2 is a sealing ring or a sealing gasket. In this embodiment, the annular seal 2 is a sealing ring, and the sealing ring is tightly held on the stud 1.2. In this way, the sealing ring can be effectively prevented from falling off.

[0048] In this embodiment, the end of the stud 1.2 close to the operating head 1.1 has a polished rod section, and the sealing ring is sleeved on the polished rod section, and the sealing ring is tightly held on the polished rod section. In this way, the sealing ring can be effectively prevented from falling off.

[0049] Furthermore, an axial through hole 1.4 is provided in the stud 1.2, and the axial through hole 1.4 passes through the stud 1.2 and the operating head 1.1. In this way, during the electrolytic polishing and passivation process, the electrolyte and the passivation liquid can circulate in the connecting pipe 8 through the inner hole of the connecting pipe 8 and the axial through hole 1.4, so as to polish and passivate the inner hole of the connecting pipe 8.

[0050] Specific embodiment three, a method for using a nut shielding device used in an electrolytic polishing and passivation process, the specific structure of the nut shielding device used in an electrolytic polishing and passivation process in this method refers to specific embodiment one.

[0051] A method for using a nut shielding device used in an electrolytic polishing and passivation process comprises the following steps in sequence: Install the plug 1 onto the silver-plated nut 7 of the VCR connector. The VCR connector includes a connecting pipe 8 and a silver-plated nut 7 connected to one end of the connecting pipe 8. The connecting pipe 8 and the silver-plated nut 7 of the VCR connector are prior art, and their specific structure is not the invention of this application. Therefore, this application does not elaborate on the specific method and structure of the connecting pipe 8 and the silver-plated nut 7 of the VCR connector and other conventional technical means.

[0052] The plug 1 is connected to the silver-plated nut 7 by threading through the stud 1.2 and the plug 1 is tightened, so that the annular seal 2 is pressed between the operating head 1.1 and one end of the silver-plated nut 7, the sealing gasket 3 at the end of the stud 1.2 is pressed tightly against the end of the pipe 8, and the pipe 8 is close to the inner end surface of the silver-plated nut 7. Based on this, the first seal can be formed between the operating head 1.1 and one end of the silver-plated nut 7 through the annular seal 2, the second seal can be formed between the end of the stud 1.2 and the end of the pipe 8 through the sealing gasket 3, and the third seal can be formed between the pipe 8 and the inner end surface of the silver-plated nut 7; thereby, the silver-plated layer on the inner thread of the silver-plated nut 7 is completely shielded, and the shielding effect and stability are good.

[0053] In addition, in actual use, it is only necessary to tighten the plug 1 onto the silver-plated nut 7 through the stud 1.2. Therefore, it is not only easy to operate, but also can effectively improve the efficiency of shielding the silver-plated nut 7; and it has a good shielding effect on the silver-plated layer, which can effectively solve the problem of defective products caused by the silver-plated layer being corroded by the chemical solution during the electrolytic polishing and passivation process of the silver-plated nut 7, thereby improving the product yield of the silver-plated nut 7 in the electrolytic polishing and passivation process.

[0054] Specific embodiment 4 is a method for using a nut shielding device used in an electrolytic polishing and passivation process. The specific structure of the nut shielding device used in an electrolytic polishing and passivation process in this method refers to specific embodiment 2.

[0055] A method for using a nut shielding device used in an electrolytic polishing and passivation process comprises the following steps in sequence: Install the plug 1 onto the silver-plated nut 7 of the VCR connector. The VCR connector includes a connecting pipe 8 and a silver-plated nut 7 connected to one end of the connecting pipe 8. The connecting pipe 8 and the silver-plated nut 7 of the VCR connector are prior art, and their specific structure is not the invention of this application. Therefore, this application does not elaborate on the specific method and structure of the connecting pipe 8 and the silver-plated nut 7 of the VCR connector and other conventional technical means.

[0056] The plug 1 is connected to the silver-plated nut 7 by threading through the stud 1.2 and the plug 1 is tightened, so that the annular seal 2 is pressed between the operating head 1.1 and one end of the silver-plated nut 7, the sealing gasket 3 at the end of the stud 1.2 is pressed tightly against the end of the pipe 8, and the pipe 8 is close to the inner end surface of the silver-plated nut 7. Based on this, the first seal can be formed between the operating head 1.1 and one end of the silver-plated nut 7 through the annular seal 2, the second seal can be formed between the end of the stud 1.2 and the end of the pipe 8 through the sealing gasket 3, and the third seal can be formed between the pipe 8 and the inner end surface of the silver-plated nut 7; thereby, the silver-plated layer on the inner thread of the silver-plated nut 7 is completely shielded, and the shielding effect and stability are good.

[0057] In addition, before the plug 1 is installed on the silver-plated nut 7, if the sealing gasket 3 falls off from the annular groove 1.3 or the sealing gasket 3 is missing, the driving pendulum will rotate the stopper rod 4.1 to the outside of the stud 1.2 under the action of the elastic member, and rotate the end of the stopper rod 4.1 to the outside of the stud 1.2 to prevent the stud 1.2 of the plug 1 from being installed on the silver-plated nut 7; at this time, the stud 1.2 will not be able to be screwed into the silver-plated nut 7 due to the obstruction of the stopper rod 4.1 located outside the stud 1.2; thereby reminding and forcing the operator to clamp the sealing gasket 3 in the annular groove 1.3 and then install the plug 1. When the sealing gasket 3 is clamped in the annular groove 1.3, the sealing gasket 3 abuts against the pressure rod 4.2 and the swing member 4 is completely contained in the installation groove 5; at this time, the normal installation of the plug 1 will not be affected. Based on this, the nut shielding device of this embodiment can effectively solve the problem that due to the missing installation of the sealing gasket 3, during the electrolytic polishing and passivation process of the silver-plated nut 7, the electrolyte and the passivation liquid will enter the internal thread of the silver-plated nut 7 through the end of the stud 1.2 and the end of the connecting pipe 8, corrode the silver-plated layer, affect product performance, and cause product defects without affecting its normal use.

[0058] In addition, in actual use, it is only necessary to tighten the plug 1 onto the silver-plated nut 7 through the stud 1.2. Therefore, it is not only easy to operate, but also can effectively improve the efficiency of shielding the silver-plated nut 7; and it has a good shielding effect on the silver-plated layer, which can effectively solve the problem of defective products caused by the silver-plated layer being corroded by the chemical solution during the electrolytic polishing and passivation process of the silver-plated nut 7, thereby improving the product yield of the silver-plated nut 7 in the electrolytic polishing and passivation process.

[0059] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A nut shielding device used in electrolytic polishing and passivation process, characterized in that: It includes a plug and a sealing gasket. The plug includes an operating head arranged at one end of the stud, and an annular groove is arranged on the other end face of the stud. An annular seal is sleeved on one end of the stud close to the operating head. The sealing gasket is clamped in the annular groove, and the sealing gasket and the annular groove have an interference fit.

2. The nut shielding device used in the electrolytic polishing and passivation process according to claim 1 is characterized in that include: A mounting groove is arranged at the other end of the stud, which connects the outer side wall of the stud and the annular groove; The swinging member is rotatably arranged in the mounting groove and comprises a stop rod and a pressure rod; An elastic member, providing elastic force to drive the stopper rod of the swing member to rotate toward the outside of the stud; When the sealing gasket is clamped in the annular clamping groove, the sealing gasket abuts against the pressure rod and enables the swinging member to be completely accommodated in the installation groove; When the sealing gasket is separated from the annular groove, the end of the blocking rod rotates to the outside of the stud under the action of the elastic member.

3. The nut shielding device used in the electrolytic polishing and passivation process according to claim 2 is characterized in that: A limiting piece is provided on the inner side wall of the installation groove, and the elastic piece provides elastic force to drive the stopper rod of the swinging piece to rotate toward the outside of the stud and abut against the limiting piece. At this time, the end of the stopper rod rotates to the outside of the stud under the action of the elastic piece.

4. The nut shielding device used in the electrolytic polishing and passivation process according to claim 2 or 3, characterized in that: The blocking rod and the pressing rod are L-shaped.

5. The nut shielding device used in the electrolytic polishing and passivation process according to claim 2 or 3, characterized in that: The elastic member is a torsion spring or a compression spring.

6. The nut shielding device used in the electrolytic polishing and passivation process according to claim 2 or 3, characterized in that: The sealing gasket comprises a hard annular bottom plate and a rubber gasket fixed on the annular bottom plate, the annular bottom plate is close to the bottom surface of the annular groove, the annular bottom plate is against the pressure rod, and the rubber gasket is interference fit with the annular groove.

7. The nut shielding device used in the electrolytic polishing and passivation process according to claim 1, 2 or 3, characterized in that: The annular sealing member is a sealing ring or a sealing gasket.

8. The nut shielding device used in the electrolytic polishing and passivation process according to claim 1, 2 or 3, characterized in that: An axial through hole is arranged in the stud, and the axial through hole passes through the stud and the operating head.

9. The nut shielding device used in the electrolytic polishing and passivation process according to claim 1, 2 or 3, characterized in that: The plug is made of Teflon.

10. A method for using the nut shielding device used in the electrolytic polishing and passivation process according to any one of claims 1 to 8, characterized in that: The following steps are included in sequence: Install the plug onto the silver-plated nut of the VCR joint. The VCR joint includes a connecting pipe and a silver-plated nut connected to one end of the connecting pipe. The plug is threadedly connected to the silver-plated nut through a stud and the plug is tightened so that the annular seal is pressed between the operating head and one end of the silver-plated nut, the sealing gasket at the end of the stud is pressed tightly against the end of the connecting pipe, and the connecting pipe is pressed against the inner end surface of the silver-plated nut.

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