Teflon protective sleeve

Abstract

The utility model provides a teflon protective sleeve which comprises a protective sleeve body, one end of the protective sleeve body is coaxially provided with an integrally-formed annular outer flange, the outer edge of the outer flange is provided with an annular clamping groove in the circumferential direction of the outer flange, and a groove opening of the clamping groove is perpendicular to the axial direction of the protective sleeve body so that the outer flange can form a double-layer structure. And a connecting flange matched with the clamping groove is arranged in the clamping groove. The connecting flange is clamped through the outer flanging of the double-layer structure, when the teflon protective sleeve is installed, the protective sleeve body can be fixedly installed on an external connecting device through the connecting flange, bidirectional installation of the connecting flange is achieved, the outer flanging can be pressed and applied with force without turning over or changing the position of the connecting flange, and the connecting flange can be conveniently installed. According to the technical scheme, the double-layer outer turnup is arranged, so that the teflon protective sleeve is more convenient to install and fix, the stability and convenience of installation of the teflon protective sleeve are improved, the connecting flange can be wrapped by the double-layer outer turnup, the connecting flange is prevented from being exposed, and the two-way sealing effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of protective sealing sleeves, in particular to a polytetrafluoroethylene protective sleeve. Background Art

[0002] PTFE, or polytetrafluoroethylene, is a polymer that is resistant to acids, alkalis and organic solvents. Protective sleeves made of PTFE are widely used in various fields that require resistance to corrosion and organic solvents, such as high-pressure containers, connecting pipes, reactors and other sealed joints containing corrosive media in chemical equipment.

[0003] Existing protective sleeves generally use a single flange structure in conjunction with a flange for compression and fixation. For example, the authorization announcement number is CN210318487U, which discloses a reactor mouth sealing sleeve. A flange for sealing the reactor mouth end face is provided at one end of the cylinder, and the flange is used to cooperate with the flange for compression and fixation. When this sealing sleeve is assembled and fixed, the flange needs to be pressed on one side of the flange for fixation. If the fixing direction needs to be changed, the flange needs to be removed and reinstalled on the other side of the flange for fixation, which results in the problem of inconvenient installation. Utility Model Content

[0004] In view of this, it is necessary to provide a polytetrafluoroethylene protective sleeve that can be installed in both directions.

[0005] A polyfluoroethylene protective sleeve comprises a protective sleeve body, one end of which is coaxially provided with an integrally formed annular outer flange, an outer edge of which is provided with an annular groove along its circumferential direction, the notch of which is perpendicular to the axial direction of the protective sleeve body, and a connecting flange matching the same is provided in the groove.

[0006] Preferably, the connecting flange is two semicircular structures that can be connected to each other, and a detachable opposite card is arranged in the card groove to form a circular flange body.

[0007] Preferably, a protruding positioning column is provided on one of the inner side walls of the slot, and a positioning groove matching the positioning column is provided on the side wall of one of the semicircular connecting flanges.

[0008] Preferably, an integrally formed annular gasket is arranged on the circumference of the outer wall of the protective sleeve body, and a raised annular sealing ring is arranged on the circumference of the outer wall of the gasket. There are multiple annular sealing rings which are arranged at intervals along the axial direction of the protective sleeve body.

[0009] Preferably, a support platform is provided on the back side of each annular sealing ring facing the outer flange, and the support platform is provided along the circumference of the gasket and is integrally formed with the gasket and the annular sealing ring.

[0010] Preferably, the other end of the protective sleeve body opposite to the outer flange is a plug-in end, and the side wall edge of each annular sealing ring facing the plug-in end is chamfered.

[0011] Preferably, the washers are in two, three or four groups and are arranged at intervals along the axial direction of the protective sleeve body.

[0012] Preferably, the outer flange is arranged in the middle of the protective sleeve body, both ends of the protective sleeve body are plug-in ends, and the washers are arranged at intervals on both sides of the outer flange.

[0013] It can be seen from the above technical scheme that the present application provides a polytetrafluoroethylene protective sleeve, including a protective sleeve body, a coaxially arranged one-piece annular outer flange at one end of the protective sleeve body, an annular slot is opened on the outer edge of the outer flange along its circumferential direction, the notch of the slot is perpendicular to the axial direction of the protective sleeve body, so that the outer flange forms a double-layer structure, and a connecting flange matching it is arranged in the slot. The outer flange of the double-layer structure is used to clamp the connecting flange. When the polytetrafluoroethylene protective sleeve is installed, the protective sleeve body can be fixedly installed on the external connection device through the connecting flange, and the connecting flange can be installed in both directions without flipping or changing the position of the connecting flange. The outer flange can be pressed and applied, making the installation and fixing of the polytetrafluoroethylene protective sleeve more convenient, improving the stability of the installation of the polytetrafluoroethylene protective sleeve and the convenience of coping with different installation methods, and the double-layer outer flange can wrap the connecting flange to avoid the connection flange from being exposed, and can achieve the effect of two-way sealing, and can also reduce the risk of the connecting flange contacting with corrosive liquids during maintenance or assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a side structural schematic diagram of the utility model.

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.

[0016] Figure 3 for Figure 2 A local enlarged schematic diagram of point A in the middle.

[0017] Figure 4 It is a schematic diagram of the assembly state of the protective sleeve body and the connecting flange.

[0018] Figure 5 It is a schematic diagram of the disassembled state of the protective sleeve body and the connecting flange.

[0019] Figure 6 This is a schematic diagram from another angle showing the protective sleeve body and the connecting flange being disassembled.

[0020] Figure 7It is a schematic diagram of the side structure of the polytetrafluoroethylene protective sleeve in another preferred embodiment.

[0021] Figure 8 It is a schematic diagram of the three-dimensional structure of the polytetrafluoroethylene protective sleeve in another preferred embodiment.

[0022] In the figure: protective sleeve body 1, gasket 2, annular sealing ring 3, support platform 4, outer flange 5, card slot 6, connecting flange 7, positioning column 8, positioning slot 9. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Please see Figure 1 and Figure 4 The utility model provides a polytetrafluoroethylene protective sleeve, including a protective sleeve body 1, the protective sleeve body 1 is integrally formed of polytetrafluoroethylene material, and an integrally formed annular outer flange 5 is coaxially arranged at one end of the protective sleeve body 1, and an annular clamping groove 6 is opened on the outer edge of the outer flange 5 along its circumferential direction, and the notch of the clamping groove 6 is perpendicular to the axial direction of the protective sleeve body 1, so that the outer flange 5 forms a double-layer structure, and a connecting flange 7 matching it is arranged in the clamping groove 6, and the connecting flange 7 is installed in the clamping groove 6, and the outer flange 5 of the double-layer structure is used to clamp the connecting flange 7. When the polytetrafluoroethylene protective sleeve is installed, the protective sleeve body can be connected through the connecting flange 7. 1 is fixedly installed on external connection equipment, such as: at the connection ports of two connection pipelines or reactors that need to be connected to each other, the connection flange 7 can be fixed to the external connection equipment on either side in one direction, and the outer flange 5 can be pressed and fixed without turning or changing the position of the connection flange 7. It can also be installed in a two-way docking manner, which improves the stability of the installation of the PTFE protective sleeve and the convenience of coping with different installation methods. In addition, the double-layer outer flange 5 can wrap the connection flange 7 to avoid the connection flange 7 from being exposed, and can achieve a two-way sealing effect. During maintenance or assembly, it can also reduce the risk of the connection flange 7 contacting with corrosive liquids. In order to facilitate the assembly of the connection flange 7, the connection flange 7 adopts two semicircular discs that can be separated and docked with each other, which are respectively clamped on the card groove 6 of the outer flange 5 and docked with each other to form a circular flange disc body.

[0025] Please see Figure 1 , Figure 5 and Figure 6Furthermore, in order to prevent the connection flange 7 and the protective cover body 1 from rotating relative to each other, a protruding positioning column 8 is provided on one of the inner side walls of the slot 6, and a positioning groove 9 matching the positioning column 8 is provided on the side wall of the connection flange 6 of one of the semicircular structures. The positioning groove is provided along the radial direction of the connection flange 6. During installation, the positioning column 8 is stuck in the positioning groove 9 to position the connection flange 6. At the same time, after the connection flange 6 is fixed to the external connection device, the cooperation between the positioning column 8 and the positioning groove 9 can ensure that the protective cover body 1 and the external connection device do not rotate relative to each other.

[0026] Please see Figures 1 to 4 The outer wall of the protective sleeve body 1 is provided with an annular gasket 2 on the circumference, and the outer wall of the gasket 2 is provided with a raised annular sealing ring 3 on the circumference. There are multiple annular sealing rings 3, which are arranged at intervals along the axial direction of the protective sleeve body 1. Each of the annular sealing rings 3 is provided with a support platform 4 on the back side facing the outer flange 5. The support platform 4 is arranged along the circumference of the gasket 2, and the support platform 4, the gasket 2 and the annular sealing ring 3 are all integrally formed with polytetrafluoroethylene material. When the polytetrafluoroethylene protective sleeve is installed and used, the plug-in end of the polytetrafluoroethylene protective sleeve is inserted into the corresponding connecting pipe or reactor connection port in a plug-in manner. The annular sealing ring 3 on the outer wall of the gasket 2 is interference fit with the inner wall of the corresponding connecting pipe or reactor connection port. A plurality of annular sealing rings 3 are arranged at intervals along the axial direction of the protective sleeve body 1, and a multi-stage seal can be formed on the outer side wall of the protective sleeve body 1. The support platform 4 is arranged on the back side of the annular sealing ring 3, and the outer diameter of the support platform 4 is smaller than the outer diameter of the annular sealing ring 3. The gasket 2 and the support platform 4 can support the annular sealing ring 3, increase the supporting force of the annular sealing ring 3, improve the strength of the annular sealing ring 3, prevent the annular sealing ring 3 from deforming during the installation or use of the polyfluoro protective sleeve, make the annular sealing ring 3 and the corresponding connecting pipeline or the connection port of the reactor more tightly combined, improve the airtightness of the polyfluoro protective sleeve, reduce the risk of leakage, and the gasket 2 also has the function of increasing the strength of the protective sleeve body 1, further improving the safety of the use of the polyfluoro protective sleeve.

[0027] Please see Figure 3 The other end of the protective cover body 1 opposite to the outer flange 5 is a plug-in end. When assembled and used, in order to facilitate the installation of the plug-in end of the protective cover body 1 at the corresponding connecting pipe or reactor connection port, a chamfer is provided on the side wall edge of each annular sealing ring 3 facing the plug-in end.

[0028] Please see Figure 1 or Figure 4In order to further improve the airtightness of the PTFE protective sleeve, the above-mentioned gaskets 2 can be set into two groups, three groups, four groups or more groups, and arranged at intervals along the axial direction of the protective sleeve body 1. The outer wall of each group of gaskets 2 is provided with an annular sealing ring 3 and a support platform 4 of the above-mentioned structure, which can form a multi-layer sealing protection on the outer wall of the protective sleeve body 1.

[0029] Please see Figure 7 and Figure 8 In another preferred embodiment, the outer flange 5 is annularly arranged in the middle of the protective sleeve body 1, both ends of the protective sleeve body 1 are plug-in ends, and the gaskets 2 are spaced apart on both sides of the outer flange 5 and spaced apart along the axial direction of the protective sleeve body 1 to form a two-way connection seal, which can be used for docking between connecting pipelines.

[0030] The PTFE protective sleeve adopts a double-layer outer flange structure, and utilizes the double-layer outer flange 5 to clamp the connecting flange 7, so that the connecting flange 7 can be fixedly installed on the outer flange in two directions, thereby improving the stability of the installation of the PTFE protective sleeve and the convenience of coping with different installation methods. In addition, the double-layer outer flange 5 can wrap the connecting flange 7 to prevent the connecting flange 7 from being exposed, so that the outer flange can achieve a two-way sealing effect, and during maintenance or assembly, it can also reduce the risk of contact between the connecting flange 7 and corrosive liquids.

[0031] The above disclosure is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

1. A polytetrafluoroethylene protective sleeve, comprising a protective sleeve body, characterized in that: An integrally formed annular outer flange is coaxially arranged at one end of the protective sleeve body, an annular groove is provided on the outer edge of the outer flange along its circumferential direction, the notch of the groove is perpendicular to the axial direction of the protective sleeve body, and a matching connecting flange is arranged in the groove.

2. The polytetrafluoroethylene protective sleeve according to claim 1, characterized in that: The connecting flange is two semicircular structures that can be butted against each other, and a detachable opposing card is arranged in the card slot to form a circular flange body.

3. The polytetrafluoroethylene protective sleeve according to claim 2, characterized in that: A protruding positioning column is arranged on one of the inner side walls of the slot, and a positioning groove matching the positioning column is opened on the side wall of the connecting flange of one of the semicircular structures.

4. The polytetrafluoroethylene protective sleeve according to claim 1, 2 or 3, characterized in that: An integrally formed annular gasket is arranged on the circumference of the outer wall of the protective sleeve body, and a raised annular sealing ring is arranged on the circumference of the outer wall of the gasket. There are multiple annular sealing rings, which are arranged at intervals along the axial direction of the protective sleeve body.

5. The polytetrafluoroethylene protective sleeve according to claim 4, characterized in that: A support platform is provided on the back side of each annular sealing ring facing the outer flange. The support platform is provided along the circumference of the gasket and is integrally formed with the gasket and the annular sealing ring.

6. The polytetrafluoroethylene protective sleeve according to claim 5, characterized in that: The other end of the protective sleeve body opposite to the outer flange is a plug-in end, and the side wall edge of each annular sealing ring facing the plug-in end is chamfered.

7. The polytetrafluoroethylene protective sleeve according to claim 6, characterized in that: The washers are arranged in two, three or four groups at intervals along the axial direction of the protective sleeve body.

8. The polytetrafluoroethylene protective sleeve according to claim 7, characterized in that: The outer flange is arranged at the middle part of the protective sleeve body, both ends of the protective sleeve body are plug-in ends, and the washers are arranged at intervals on both sides of the outer flange.

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