A kind of winding gasket for petrochemical steel pipe flange

Abstract

The application discloses a winding gasket for a petroleum chemical steel pipe flange, which comprises a flange plate, a plurality of groups of mounting holes are formed in the inner side of the flange plate, a flange ring is fixedly arranged at one end of the flange plate, a winding gasket body is arranged at the side of the flange plate close to the flange ring, the winding gasket body comprises an outer ring arranged at the side of the flange plate, a graphite belt is fixedly arranged at the inner side of the outer ring, an inner ring is fixedly arranged at the inner side of the graphite belt, a positioning mechanism for positioning and fixing is arranged at the inner side of the outer ring, and a control mechanism facilitating replacement is arranged at the outer side of the outer ring. The winding gasket for the petroleum chemical steel pipe flange is characterized in that the positioning mechanism and the control mechanism are moved in cooperation with each other, the winding gasket body is automatically aligned and fixed on the flange plate, and the installation and dismounting of the winding gasket body are satisfied in the effective space.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of winding gasket, in particular to a winding gasket for petroleum chemical industry steel pipe flange. BACKGROUND

[0002] Flange is also called flange flange or flange. Flange is the connecting part between shafts, used for connecting between pipe ends; also used on the inlet and outlet of the device, used for connecting between two devices, such as speed reducer flange. Flange connection or flange joint is a combined sealing structure composed of flange, gasket and bolt.

[0003] At present, when the steel pipe for petroleum chemical industry is connected through flange, winding gasket is usually placed between two groups of flanges for sealing. The structure density of winding gasket can be made according to different locking force requirements, and the inner and outer steel rings are used to control the maximum compression degree. The surface precision requirement of the flange sealing surface contacted by the metal winding gasket is not high. When the existing winding gasket is connected with the flange, the winding gasket is sleeved outside the flange ring on one side of the flange, and the flanges on both sides are sealed by using bolts. However, the pipe on one side of the flange is usually fixedly installed with other pipes, so that the position of the pipe and the flange is fixed. When the inner winding gasket is disassembled and replaced, it is difficult to open a larger space between the two groups of flanges to disassemble the bolts on the winding gasket and take out the winding gasket sleeved on the flange for replacement due to the fixation of the pipes on both sides. SUMMARY

[0004] The main purpose of the present application is to provide a winding gasket for petroleum chemical industry steel pipe flange, which can effectively solve the problems in the background art.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0006] A winding gasket for petroleum chemical industry steel pipe flange, comprising a flange plate, a plurality of groups of mounting holes are formed in the inner side of the flange plate, a flange ring is fixedly arranged at one end of the flange plate, a winding gasket body is arranged at the position close to the flange ring on one side of the flange plate, the winding gasket body comprises an outer ring arranged on one side of the flange plate, a graphite belt is fixedly arranged on the inner side of the outer ring, an inner ring is fixedly arranged on the inner side of the graphite belt, a positioning mechanism for positioning and fixing is arranged on the inner side of the outer ring, a control mechanism for facilitating replacement is arranged on the outer side of the outer ring, and a tab is fixedly arranged on the outer side of the outer ring.

[0007] Preferably, the positioning mechanism comprises four groups of circular grooves opened in the inner side of the outer ring, a cylinder movably arranged at the inner side of the circular groove, a positioning block movably arranged at the inner side of the cylinder, a spring fixedly arranged between the positioning block and the inner wall of one side of the cylinder, a circular block fixedly arranged at the outer side of the cylinder, a ring groove opened at the inner side of the outer ring close to the outer side of the circular groove, a circular ring movably arranged at the inner side of the ring groove, a connecting port opened between the ring groove and the circular groove close to the circular block, and a control port opened at the inner side of the circular ring close to the four groups of circular blocks.

[0008] Preferably, a clamping groove ring is opened at the inner side of the outer ring close to the inner side of the circular groove, and a limiting ring is movably arranged at the inner side of the clamping groove ring.

[0009] Preferably, the circular groove and the ring groove connecting port are in communication, the cylinder penetrates one side of the circular groove, and the four groups of positioning blocks are fitted on the outer side of the flange ring.

[0010] Preferably, the circular block penetrates the inner side of the connecting port to the control port, and the control port is arranged in an inclined manner.

[0011] Preferably, the limiting ring is movably arranged at the inner side of the clamping groove ring.

[0012] Preferably, the control mechanism comprises a first shaft frame fixedly arranged at the outer side of the circular ring, a sliding port opened at the inner side of the outer ring close to the first shaft frame, a second shaft frame fixedly arranged at the outer side of the outer ring close to the first shaft frame, a first connecting ring movably arranged at the inner side of the first shaft frame, a second connecting ring movably arranged at the inner side of the second shaft frame, two groups of shaft blocks fixedly arranged at the outer side of the first connecting ring and the second connecting ring, a screw movably arranged between the first connecting ring and the second connecting ring, and two groups of fixed rings fixedly arranged at the outer side of the screw.

[0013] Preferably, the first shaft frame is connected with the circular ring through the sliding port, and the sliding port is in communication with the inner side of the ring groove.

[0014] Preferably, the second connecting ring is movably arranged between the two groups of fixed rings, and the screw is threadedly connected with the first connecting ring.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1. Move the four sets of positioning blocks on one side of the spiral wound gasket body against one end of the flange, so that the four sets of positioning blocks are respectively fitted onto the outer side of the flange ring. The springs installed between the positioning blocks and the cylinder allow the positioning blocks to automatically extend and retract during the movement. Before the positioning blocks are fitted onto the outer side of the flange ring and aligned, the cylinder is restricted and kept stationary by the round block inside the control port. The four sets of positioning blocks are aligned and fitted onto the outer side of the spiral wound gasket body. After fitting, the four sets of positioning blocks will generate resistance, reminding the operator that the center position of the flange and the inner ring is aligned. This achieves the purpose of quick and convenient alignment, avoiding the need to judge whether the gasket is in the center position of the flange by visual inspection and experience in a limited space.

[0017] 2. With the magnetic attraction generated by the magnetic ring, after the four sets of positioning blocks move and align with the main body of the spiral wound gasket, the magnetic ring will directly adhere to one end of the flange for fixation. When the flanges on both sides are installed together, the main body of the spiral wound gasket will remain fixedly adhered to one end of the flange without the need for support, thus avoiding displacement during installation that may affect the sealing performance.

[0018] 3. By turning the screw with a tool, the ring rotates, pushing the positioning block to move inward into the groove, releasing the restriction on the flange ring. If the bolts between the two flanges are loosened and the spiral wound gasket body is relatively loose, the spiral wound gasket body will automatically fall off. If there is some resistance in the contact, it can be pulled out directly with a lever, making it convenient to replace the spiral wound gasket body. At the same time, when the space between the two flanges is restricted after the pipes on both sides are installed with other pipes or components, as long as the spiral wound gasket body can move within it, it will be suitable for the installation and removal of the spiral wound gasket body without the need to disassemble more pipes or components for replacement. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the partially opened structure of the present invention;

[0021] Figure 3 This is a partial cross-sectional view of the present invention;

[0022] Figure 4 This is an enlarged structural diagram of part A of the present invention;

[0023] Figure 5 This is a partial structural diagram of the positioning mechanism of the present invention;

[0024] Figure 6 This is a partial cross-sectional view of the positioning mechanism of the present invention;

[0025] Figure 7The schematic view of the control mechanism of the application partially expands the structure.

[0026] In the figure: 1, flange plate; 2, mounting hole; 3, flange ring; 4, winding gasket body; 41, outer ring; 42, graphite tape; 43, inner ring; 5, control mechanism; 51, round groove; 52, cylinder; 53, positioning block; 54, spring; 55, round block; 56, annular groove; 57, circular ring; 58, connecting port; 59, control port; 510, clamping groove ring; 511, limiting ring; 512, magnetic attraction ring; 6, control mechanism; 61, first shaft support; 62, sliding port; 63, second shaft support; 64, first connecting ring; 65, second connecting ring; 66, shaft block; 67, screw; 68, fixing ring; 7, push piece. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments of the application.

[0028] In the description of the application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the relative positional relationship of the orientation or position, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0029] Please refer to Figures 1-7 An embodiment provided by the application: a winding gasket for a petroleum chemical steel pipe flange, comprising a flange plate 1, a plurality of groups of mounting holes 2 are formed on the inner side of the flange plate 1, a flange ring 3 is fixedly arranged at one end of the flange plate 1, a winding gasket body 4 is arranged at the position of one side of the flange plate 1 close to the flange ring 3, the winding gasket body 4 comprises an outer ring 41 arranged on one side of the flange plate 1, a graphite tape 42 is fixedly arranged on the inner side of the outer ring 41, an inner ring 43 is fixedly arranged on the inner side of the graphite tape 42, a positioning mechanism 5 for positioning and fixing is arranged on the inner side of the outer ring 41, a control mechanism 6 for facilitating replacement is arranged on the outer side of the outer ring 41, and a push piece 7 is fixedly arranged on the outer side of the outer ring 41.

[0030] The positioning mechanism 5 comprises four groups of circular grooves 51 formed in the inner side of the outer ring 41, the inner side of the circular groove 51 movably provided with a cylinder 52, the inner side of the cylinder 52 movably provided with a positioning block 53, the positioning block 53 and the inner wall of one side of the cylinder 52 fixedly provided with a spring 54, the outer side of the cylinder 52 fixedly provided with a circular block 55, the inner side of the outer ring 41 close to the position of the outer side of the circular groove 51 is provided with an annular groove 56, the inner side of the annular groove 56 movably provided with a circular ring 57, the annular groove 56 and the circular groove 51 are provided with a connecting port 58 close to the position of the circular block 55, the inner side of the circular ring 57 close to the position of the four groups of circular blocks 55 is respectively provided with a control port 59, the inner side of the outer ring 41 close to the position of the inner side of the circular groove 51 is provided with a clamping groove ring 510, the inner side of the clamping groove ring 510 movably provided with a limiting ring 511, one side of the limiting ring 511 fixedly provided with a magnetic attraction ring 512.

[0031] The inner side of the circular groove 51, the annular groove 56 connecting port 58 is communicated, the cylinder 52 penetrates one side of the circular groove 51, the four groups of positioning blocks 53 are fitted on the outer side of the flange ring 3, the circular block 55 penetrates the inner side of the connecting port 58 to the control port 59, the control port 59 is inclined, the limiting ring 511 is limitedly rotatably arranged in the inner side of the clamping groove ring 510.

[0032] The four groups of positioning blocks 53 arranged on one side of the winding gasket body 4 are fitted on one end of the flange plate 1, so that the four groups of positioning blocks 53 are fitted on the outer side of the flange ring 3, and the spring 54 arranged between the positioning block 53 and the cylinder 52 facilitates the movement of the positioning block 53 when the positioning block 53 is not aligned with the outer side of the flange ring 3, the four groups of positioning blocks 53 are aligned and fitted on the outer side of the winding gasket body 4, and the four groups of positioning blocks 53 will generate resistance after being fitted, reminding the operator that the center position of the flange plate 1 and the inner ring 43 has been aligned, the purpose of fast and convenient alignment of the two, avoiding the need to judge whether the gasket is in the center position of the flange plate by naked eye and experience in the limited space, in addition, the magnetic attraction ring 512 generates a magnetic attraction force, and after the four groups of positioning blocks 53 are moved and aligned with the winding gasket body 4, the magnetic attraction ring 512 is directly adsorbed on one end of the flange plate 1 for fixation, when the flange plates 1 on both sides are connected and installed, the winding gasket body 4 is always fixedly adsorbed on one end of the flange plate 1, without the need to support it, avoiding the influence of the sealing performance caused by the deviation during installation.

[0033] The control mechanism 6 comprises a first shaft support 61 fixedly arranged outside the circular ring 57, a sliding opening 62 is arranged on the inner side of the outer ring 41 close to the first shaft support 61, a second shaft support 63 is fixedly arranged on the outer side of the outer ring 41 close to the first shaft support 61, a first connecting ring 64 is movably arranged on the inner side of the first shaft support 61, a second connecting ring 65 is movably arranged on the inner side of the second shaft support 63, two groups of shaft blocks 66 are fixedly arranged on the outer side of the first connecting ring 64 and the second connecting ring 65, a screw 67 is movably arranged between the first connecting ring 64 and the second connecting ring 65, two groups of fixed rings 68 are fixedly arranged on the outer side of the screw 67, the first shaft support 61 is connected with the circular ring 57 through the sliding opening 62, the sliding opening 62 is communicated with the inside of the annular groove 56, the second connecting ring 65 is limitingly arranged between the two groups of fixed rings 68, and the screw 67 is threadedly connected with the first connecting ring 64.

[0034] When it is necessary to replace the winding gasket body 4, the screw 67 is rotated by a tool, the threadedly connected first connecting ring 64 pushes the fixed first shaft support 61 and the circular ring 57 to rotate on the inner side of the annular groove 56 through the shaft blocks 66, at this time, the control opening 59 arranged obliquely pushes the four groups of sleeve-connected circular blocks 55 to drive the cylinder 52 and the positioning block 53 to move to the inner side of the circular groove 51, the restriction with the flange ring 3 is released, if the bolts between the two groups of flanges 1 are removed, the winding gasket body 4 is released relatively loose, the winding gasket body 4 will automatically fall down, and when the contact has a certain resistance, the winding gasket body 4 can be directly pulled out through the push piece 7, the winding gasket body 4 is convenient to replace, and when the two groups of flanges are limited in space after the two pipes and other pipes or components are installed, only the winding gasket body 4 can move in the space, the installation and disassembly of the winding gasket body 4 are applicable, more pipes or components do not need to be disassembled and replaced.

[0035] Working principle:

[0036] When installing, first, the four sets of positioning blocks 53 provided on one side of the winding gasket body 4 are attached to one end of the flange plate 1, and the four sets of positioning blocks 53 are respectively sleeved on the outside of the flange ring 3. The spring 54 provided between the positioning block 53 and the cylinder 52 is limited to remain stationary in the control port 59 by the round block 55 during the movement process. When the positioning block 53 is not aligned and sleeved on the outside of the flange ring 3, the automatic expansion of the positioning block 53 facilitates the movement to find that the cylinder 52 is stationary at this time. The four sets of positioning blocks 53 are aligned and sleeved on the outside of the winding gasket body 4. After the four sets of positioning blocks 53 are moved and aligned with the winding gasket body 4, the magnetic attraction ring 512 directly absorbs the flange plate 1 at one end for fixation. When the flange plates 1 on both sides are connected and installed, the winding gasket body 4 is always fixed and absorbed at one end of the flange plate 1, and it is not necessary to support it, so as to avoid the deviation during installation and affect the sealing performance. Secondly, the winding gasket body 4 needs to be replaced. The first connecting ring 64 connected by threads pushes the fixed first shaft support 61 and the circular ring 57 to rotate in the inside of the annular groove 56 by the shaft block 66 through the tool rotating the screw 67. At this time, the control port 59 provided in an inclined manner pushes the four sets of round blocks 55 to drive the cylinder 52 and the positioning block 53 to move to the inside of the circular groove 51, so as to release the limitation of the flange ring 3. If the bolts between the two flange plates 1 are removed, the winding gasket body 4 is released and relaxed, and the winding gasket body 4 will automatically fall down. When there is a certain resistance between the contacts, the winding gasket body 4 can be directly pulled out by the push piece 7, so as to facilitate the replacement of the winding gasket body 4. At the same time, after the pipelines on both sides and other pipelines or components are installed, the space between the two flanges is limited, and the winding gasket body 4 can move in the space, so as to be suitable for the installation and disassembly of the winding gasket body 4, and it is not necessary to disassemble more pipelines or components for replacement.

[0037] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A winding gasket for use in petrochemical steel pipe flanges, comprising a flange plate (1), characterized in that: The inner side of the flange plate (1) is provided with a plurality of groups of mounting holes (2), one end of the flange plate (1) is fixedly provided with a flange ring (3), and the side of the flange plate (1) is provided with a winding gasket body (4) near the flange ring (3). The winding gasket body (4) comprises an outer ring (41) arranged on one side of the flange plate (1), the inner side of the outer ring (41) is fixedly provided with a graphite strip (42), the inner side of the graphite strip (42) is fixedly provided with an inner ring (43), the inner side of the outer ring (41) is provided with a positioning mechanism (5) for positioning and fixing, the outer side of the outer ring (41) is provided with a control mechanism (6) for facilitating replacement, and the outer side of the outer ring (41) is fixedly provided with a dial piece (7). The positioning mechanism (5) comprises four groups of circular grooves (51) formed in the inner side of the outer ring (41), the inner side of the circular groove (51) is movably provided with a cylinder (52), the inner side of the cylinder (52) is movably provided with a positioning block (53), the positioning block (53) and the inner wall of one side of the cylinder (52) are fixedly provided with a spring (54), the outer side of the cylinder (52) is fixedly provided with a circular block (55), the inner side of the outer ring (41) is provided with an annular groove (56) near the outer side of the circular groove (51), the inner side of the annular groove (56) is movably provided with a circular ring (57), the annular groove (56) and the circular groove (51) are provided with a connecting port (58) near the circular block (55), and the inner side of the circular ring (57) is provided with a control port (59) near the four groups of circular blocks (55). The inner side of the outer ring (41) is provided with a clamping groove ring (510) near the inner side of the circular groove (51), the inner side of the clamping groove ring (510) is movably provided with a limiting ring (511), and the side of the limiting ring (511) is fixedly provided with a magnetic attraction ring (512). The circular block (55) penetrates the inner side of the connecting port (58) to the control port (59), and the control port (59) is inclined. The control mechanism (6) comprises a first shaft support (61) fixedly arranged on the outer side of the circular ring (57), a sliding port (62) is formed in the inner side of the outer ring (41) near the first shaft support (61), a second shaft support (63) is fixedly arranged on the outer side of the outer ring (41) near the first shaft support (61), a first connecting ring (64) is movably arranged on the inner side of the first shaft support (61), a second connecting ring (65) is movably arranged on the inner side of the second shaft support (63), two groups of shaft blocks (66) are fixedly arranged on the outer sides of the first connecting ring (64) and the second connecting ring (65), a screw (67) is movably arranged between the first connecting ring (64) and the second connecting ring (65), and two groups of fixed rings (68) are fixedly arranged on the outer side of the screw (67).

2. A spiral wound gasket for use in petroleum and chemical steel pipe flanges according to claim 1, characterized in that: The circular groove (51), the annular groove (56) and the connecting port (58) are in communication, the cylinder (52) penetrates one side of the circular groove (51), and the four groups of positioning blocks (53) are fitted on the outer side of the flange ring (3).

3. A spiral wound gasket for use in petroleum and chemical steel pipe flanges according to claim 1, characterized in that: The limiting ring (511) is rotationally limited and arranged inside the clamping groove ring (510).

4. A spiral wound gasket for use in petroleum and chemical steel pipe flanges according to claim 1, characterized in that: The first shaft support (61) is connected with the circular ring (57) through a sliding opening (62), and the sliding opening (62) is communicated with the inside of the annular groove (56).

5. A spiral wound gasket for use in petroleum and chemical steel pipe flanges according to claim 1, characterized in that: The second connecting ring (65) is rotationally arranged between the two groups of fixing rings (68), and the screw (67) is in threaded connection with the first connecting ring (64).

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