Mechanical sealing structure and flow passage component comprising same

Abstract

The invention provides a mechanical sealing structure and a flow passage component comprising the same, and relates to the technical field of pipeline valve sealing. The mechanical sealing structure comprises a first flange plate, a sleeve column is fixedly connected to the center of the upper end face of the first flange plate, supports are fixedly connected to the upper portions of the centers of the two side walls of the sleeve column, first sealing structures are arranged in the two supports, each first sealing structure comprises a pipeline, and a mounting plate is arranged at the end of each pipeline. A first water swelling pad is arranged in the pipeline, a base is arranged at the position, close to one end, of the center of the upper end face of the first water swelling pad, the base penetrates through the upper inner wall of the pipeline and extends to the upper end of the pipeline, the end of the base is slidably connected with a pre-cooling swelling block, the upper end face of the pre-cooling swelling block is fixedly connected with a base, and the upper end of the base is fixedly connected with a connecting seat rod. The gap between the valve rod and the first flange plate is filled through the first sealing structure, and higher sealing performance can be provided when the valve meets cold and water.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline valve sealing, in particular to a mechanical sealing structure and a flow-through component comprising the structure. Background Art

[0002] A pipeline valve is a device installed in a pipeline system to control, regulate or cut off the flow of fluid. It is a key component in a pipeline system and is widely used in industrial, civil and municipal engineering fields. Selecting a suitable pipeline valve and performing correct installation and maintenance can ensure the safe and efficient operation of the pipeline system. A mechanical seal is a device used to prevent fluid leakage and is widely used in various rotating machines. It achieves a sealing effect by forming a sealing surface between the rotating shaft and the stationary parts.

[0003] There are still some problems in the use of existing mechanical sealing structures. At present, the sealing structure of the flow-through structure only relies on the sealing gasket and the pre-tightening force between the flange to improve the sealing performance. During long-term use, the sealing gasket between the valve stem and the flange is subject to wear and a small range of corrosion, which may also cause leakage. It is also affected by temperature and gaps may appear at lower temperatures, causing leakage. Therefore, those skilled in the art provide a mechanical sealing structure and a flow-through component including the structure to solve the problems raised in the above background technology. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a mechanical sealing structure and a flow-through component comprising the structure, which solves the problem that the sealing gasket may be subject to wear and small-scale corrosion during long-term use, which may also cause leakage, and may be affected by temperature and form gaps at lower temperatures, thereby causing leakage.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a mechanical sealing structure, including a first flange, a sleeve column is fixedly connected at the center of the upper end surface of the first flange, and brackets are fixedly connected at the upper center of the two side walls of the sleeve column, and a first sealing structure is provided inside the two brackets;

[0008] The first sealing structure comprises a pipeline, a mounting plate is provided at the end of the pipeline, a first water-expandable pad is provided inside the pipeline, a base is provided at one end of the center of the upper end surface of the first water-expandable pad, the base passes through the upper inner wall of the pipeline to the upper end of the pipeline, and the end is slidably connected with a precooling expansion block, the upper end surface of the precooling expansion block is fixedly connected with a base, the upper end of the base is fixedly connected with a connecting seat, an L-shaped pressure rod is provided at the upper part of the connecting seat, an axle rod is sleeved on the outer side wall of the L-shaped pressure rod, the axle rod is rotatably connected to the inside of the bracket, and a pressure block is fixedly connected to the lower end surface of the other end of the L-shaped pressure rod;

[0009] A second flange is disposed at the lower end of the first flange, a groove is provided on the upper end of the second flange, two sealing rubbers are provided inside the groove, and a connecting structure is provided on the lower end surface of the first flange inside the sealing rubber.

[0010] Preferably, a second water-swellable pad is fixedly connected to the lower part of the sleeve column, a plurality of disc sealing pads are arranged vertically on the upper end of the second water-swellable pad, and a top cover is provided on the upper end surface of the disc sealing pad.

[0011] Preferably, a frame is provided on the outer wall of the sleeve, a valve stem is provided at the upper part of the frame, the valve stem passes through the upper end of the frame and reaches the upper end of the frame, and a turntable is provided at the end, the lower end of the valve stem passes through the sleeve, the first flange and the second flange in sequence and reaches the lower end of the second flange.

[0012] Preferably, the connection structure includes a connection block, an inner wall of the connection block is provided with an internal thread, an outer wall of the connection block is provided with an external thread, the external thread and the internal thread are respectively threadedly connected to the inner wall of the groove, and the two sealing rubbers are respectively arranged at the lower end of the connection block and the inner side of the connection block.

[0013] Preferably, a mounting groove is provided on the lower end surface of the second flange on the outside of the valve stem, a second sealing structure is provided inside the mounting groove, the second sealing structure includes a corrugated groove, a corrugated sealing gasket is provided on the inner side of the corrugated groove, a corrugated rubber gasket is provided on the inner side wall of the corrugated sealing gasket, and a sealing ring is provided at the lower end of the corrugated rubber gasket.

[0014] A flow component, the flow component comprising:

[0015] The valve body is directly connected to the equipment and forms a flow channel for the medium to flow;

[0016] Mechanical seal structure, used to seal between valve body and valve stem;

[0017] The valve seat is installed on the valve body and forms a sealing pair with the opening and closing parts;

[0018] Opening and closing parts are parts used to cut off or adjust the flow of media;

[0019] Sealing surface, the opening and closing parts fit tightly against the valve seat, and are the two contact surfaces that act as a seal.

[0020] (III) Beneficial effects

[0021] The present invention provides a mechanical seal structure and a flow-through component including the structure, which has the following beneficial effects:

[0022] 1. In the present invention, when water leaks from the gap between the first flange and the valve stem to the inside of the sleeve, the second water-swellable pad swells when exposed to water to improve the sealing performance, and then the two first water-swellable pads swell when exposed to water to push the two bases upward, thereby pushing the two connecting seats upward, so that the L-shaped pressure rod rotates with the shaft rod, and the other end of the L-shaped pressure rod moves downward, so that the top cover moves downward, thereby further improving the sealing performance and preventing leakage.

[0023] 2. In the present invention, when used under low temperature conditions, the pre-cooling expansion block expands, pushing the base and the connecting seat to move upward, thereby pushing the L-shaped pressure rod to rotate, causing the L-shaped pressure rod to rotate with the shaft rod, thereby squeezing the top cover to move downward, thereby improving the sealing and preventing leakage under low temperature conditions.

[0024] 3. In the present invention, the corrugated sealing gasket is placed inside the corrugated groove, and then the corrugated rubber gasket is inserted into the inner side of the corrugated sealing gasket, so as to fill the gap between the valve stem and the first flange, thereby improving the sealing between the valve stem and the first flange.

[0025] 4. In the present invention, two sealing rubbers are first placed inside the groove, and then the connecting block at the lower end of the first flange is placed inside the groove. The first flange is rotated so that the external thread and the internal thread are threadedly connected on the inner wall of the groove, the two sealing rubbers are squeezed, and then the second flange and the first flange are connected by bolts, so as to improve the connectivity and reduce the possibility of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A perspective view of the present invention;

[0027] Figure 2 is a three-dimensional cross-sectional view of the present invention;

[0028] Figure 3 It is a front cross-sectional view of the present invention;

[0029] Figure 4 is a front cross-sectional view of a first sealing structure of the present invention;

[0030] Figure 5 for Figure 4 The enlarged schematic diagram of point A in the middle;

[0031] Figure 6 for Figure 4 A magnified schematic diagram of point B in the middle.

[0032] Among them, 1. the first flange; 2. the first sealing structure; 201. the pipeline; 202. the mounting plate; 203. the first water-swelling pad; 204. the shaft; 205. the pressure block; 206. the L-shaped pressure rod; 207. the second water-swelling pad; 208. the disc sealing pad; 209. the top cover; 210. the base; 211. the precooling expansion block; 212. the base; 213. the connecting seat; 3. the frame; 4. the turntable; 5. the valve stem; 6. the sleeve column; 7. the bracket; 8. the second sealing structure; 801. the corrugated groove; 802. the corrugated sealing pad; 803. the corrugated rubber pad; 804. the sealing ring; 9. the connecting structure; 901. the connecting block; 902. the external thread; 903. the internal thread; 10. the second flange; 11. the groove; 12. the sealing rubber; 13. the mounting groove. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1:

[0035] like Figure 1-6 As shown, an embodiment of the present invention provides a mechanical sealing structure, including a first flange 1, a sleeve 6 is fixedly connected to the center of the upper end surface of the first flange 1, and brackets 7 are fixedly connected to the upper center of the two side walls of the sleeve 6. A first sealing structure 2 is provided inside the two brackets 7. The gap between the valve stem 5 and the first flange 1 is filled by the first sealing structure 2, and higher sealing performance can be provided when exposed to cold and water.

[0036] The first sealing structure 2 includes a pipe 201, a mounting plate 202 is provided at the end of the pipe 201, a first water-expandable pad 203 is provided inside the pipe 201, a base 210 is provided at one end of the center of the upper end surface of the first water-expandable pad 203, the base 210 penetrates the upper inner wall of the pipe 201 and passes to the upper end of the pipe 201, and a precooling expansion block 211 is slidably connected to the end, a base 212 is fixedly connected to the upper end surface of the precooling expansion block 211, a connecting seat 213 is fixedly connected to the upper end of the base 212, and an L-shaped pressure rod is provided at the upper part of the connecting seat 213 206, an axle rod 204 is sleeved on the outer side wall of the L-shaped pressure rod 206, and the axle rod 204 is rotatably connected to the inside of the bracket 7, and a pressure block 205 is fixedly connected to the lower end surface of the other end of the L-shaped pressure rod 206. The two first water-swellable pads 203 swell when exposed to water, and the two bases 210 are pushed upward, thereby pushing the two connecting seats 213 to move upward, so that the L-shaped pressure rod 206 rotates with the axle rod 204, and the other end of the L-shaped pressure rod 206 moves downward, so that the top cover 209 moves downward, thereby further improving the sealing performance and preventing leakage.

[0037] A second flange 10 is provided at the lower end of the first flange 1, a groove 11 is provided on the upper end of the second flange 10, two sealing rubbers 12 are provided inside the groove 11, and a connecting structure 9 is provided on the lower end surface of the first flange 1 inside the sealing rubber 12, and the connecting structure 9 improves the connectivity and sealing between the first flange 1 and the second flange 10.

[0038] A second water-swellable pad 207 is fixedly connected to the lower part of the sleeve column 6. A plurality of disc sealing pads 208 are arranged in an upper and lower arrangement on the upper end of the second water-swellable pad 207. A top cover 209 is provided on the upper end surface of the disc sealing pad 208. The second water-swellable pad 207 expands when exposed to water to perform preliminary sealing.

[0039] A frame 3 is provided on the outer wall of the sleeve column 6, and a valve stem 5 is provided at the upper part of the frame 3. The valve stem 5 passes through the upper end of the frame 3 and reaches the upper end of the frame 3, and a turntable 4 is provided at the end. The lower end of the valve stem 5 passes through the sleeve column 6, the first flange 1 and the second flange 10 in sequence, and reaches the lower end of the second flange 10. The turntable 4 is connected to the opening and closing member through the valve stem 5.

[0040] The connection structure 9 includes a connection block 901, an internal thread 903 is provided on the inner wall of the connection block 901, and an external thread 902 is provided on the outer wall of the connection block 901. The external thread 902 and the internal thread 903 are respectively threadedly connected to the inner wall of the groove 11, and two sealing rubbers 12 are respectively arranged at the lower end of the connection block 901 and the inner side of the connection block 901. First, the two sealing rubbers 12 are placed inside the groove 11, and then the connection block 901 at the lower end of the first flange 1 is placed inside the groove 11. The first flange 1 is rotated so that the external thread 902 and the internal thread 903 are threadedly connected to the inner wall of the groove 11, the two sealing rubbers 12 are squeezed, and then the second flange 10 and the first flange 1 are connected by bolts, so as to improve the connectivity and reduce the possibility of leakage.

[0041] A mounting groove 13 is provided on the lower end surface of the second flange 10 on the outside of the valve stem 5, and a second sealing structure 8 is provided inside the mounting groove 13. The second sealing structure 8 includes a corrugated groove 801, and a corrugated sealing gasket 802 is provided on the inner side of the corrugated groove 801. A corrugated rubber gasket 803 is provided on the inner side wall of the corrugated sealing gasket 802, and a sealing ring 804 is provided at the lower end of the corrugated rubber gasket 803. The corrugated sealing gasket 802 is placed into the corrugated groove 801, and then the corrugated rubber gasket 803 is inserted into the inner side of the corrugated sealing gasket 802, so as to fill the gap between the valve stem 5 and the first flange 1, thereby improving the sealing between the valve stem 5 and the first flange 1.

[0042] A flow component, the flow component comprising:

[0043] The valve body is directly connected to the equipment and forms a flow channel for the medium to flow;

[0044] Mechanical seal structure, used to seal between valve body and valve stem;

[0045] The valve seat is installed on the valve body and forms a sealing pair with the opening and closing parts;

[0046] Opening and closing parts are parts used to cut off or adjust the flow of media;

[0047] Sealing surface, the opening and closing parts fit tightly against the valve seat, and are the two contact surfaces that act as a seal.

[0048] Working principle: During the installation process, first place the two sealing rubbers 12 inside the groove 11, then place the connecting block 901 at the lower end of the first flange 1 inside the groove 11, rotate the first flange 1, so that the external thread 902 and the internal thread 903 are threadedly connected to the inner wall of the groove 11, squeeze the two sealing rubbers 12, and then connect the second flange 10 and the first flange 1 by bolts to improve connectivity and reduce the possibility of leakage.

[0049] Place the corrugated sealing gasket 802 into the corrugated groove 801 and then insert the corrugated rubber gasket 803 into the inner side of the corrugated sealing gasket 802 to fill the gap between the valve stem 5 and the first flange 1, thereby improving the sealing between the valve stem 5 and the first flange 1.

[0050] When water leaks from the gap between the first flange 1 and the valve stem 5 to the inside of the sleeve 6, the second water-swellable pad 207 swells when exposed to water to improve the sealing performance, and then the two first water-swellable pads 203 swell when exposed to water to push the two bases 210 upward, thereby pushing the two connecting seats 213 upward, so that the L-shaped pressure rod 206 rotates with the shaft 204, and the other end of the L-shaped pressure rod 206 moves downward, so that the top cover 209 moves downward, thereby further improving the sealing performance and preventing leakage.

[0051] When used under low temperature conditions, the pre-cooling expansion block 211 expands, pushing the base 212 and the connecting seat 213 to move upward, thereby pushing the L-shaped pressure rod 206 to rotate, causing the L-shaped pressure rod 206 to rotate with the shaft 204, thereby squeezing the top cover 209 to move downward, thereby improving the sealing and preventing leakage under low temperature conditions.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical seal structure, comprising a first flange (1), characterized in that: A sleeve column (6) is fixedly connected at the center of the upper end surface of the first flange (1), and brackets (7) are fixedly connected at the upper center of the two side walls of the sleeve column (6), and the first sealing structure (2) is provided inside the two brackets (7); The first sealing structure (2) comprises a pipeline (201), a mounting plate (202) is provided at the end of the pipeline (201), a first water-swellable pad (203) is provided inside the pipeline (201), a base (210) is provided at the center of the upper end surface of the first water-swellable pad (203) near one end, the base (210) penetrates the upper inner wall of the pipeline (201) and reaches the upper end of the pipeline (201), and a pre-cooling expansion block (211) is slidably connected to the end thereof, The upper end surface of the precooling expansion block (211) is fixedly connected to a base (212), the upper end of the base (212) is fixedly connected to a connecting seat (213), an L-shaped pressure rod (206) is provided at the upper part of the connecting seat (213), an axle rod (204) is sleeved on the outer wall of the L-shaped pressure rod (206), the axle rod (204) is rotatably connected to the inside of the bracket (7), and a pressure block (205) is fixedly connected to the lower end surface of the other end of the L-shaped pressure rod (206); A second flange (10) is provided at the lower end of the first flange (1), a groove (11) is provided at the upper end of the second flange (10), two sealing rubbers (12) are provided inside the groove (11), and a connecting structure (9) is provided on the lower end surface of the first flange (1) inside the sealing rubber (12).

2. A mechanical seal structure according to claim 1, characterized in that: A second water-swellable pad (207) is fixedly connected to the lower part of the sleeve column (6), and a plurality of disc sealing pads (208) are arranged in an upper and lower manner on the upper end of the second water-swellable pad (207), and a top cover (209) is provided on the upper end surface of the disc sealing pad (208).

3. A mechanical seal structure according to claim 1, characterized in that: A frame (3) is provided on the outer wall of the sleeve (6), a valve stem (5) is provided at the upper part of the frame (3), the valve stem (5) passes through the upper end of the frame (3) and reaches the upper end of the frame (3), and a turntable (4) is provided at the end, the lower end of the valve stem (5) passes through the sleeve (6), the first flange (1) and the second flange (10) in sequence and reaches the lower end of the second flange (10).

4. A mechanical seal structure according to claim 1, characterized in that: The connection structure (9) comprises a connection block (901), an inner wall of the connection block (901) is provided with an internal thread (903), an outer wall of the connection block (901) is provided with an external thread (902), the external thread (902) and the internal thread (903) are respectively threadedly connected to the inner wall of the groove (11), and the two sealing rubbers (12) are respectively arranged at the lower end of the connection block (901) and the inner side of the connection block (901).

5. A mechanical seal structure according to claim 1, characterized in that: A mounting groove (13) is provided on the lower end surface of the second flange (10) on the outer side of the valve stem (5), and a second sealing structure (8) is provided inside the mounting groove (13). The second sealing structure (8) includes a corrugated groove (801), and a corrugated sealing gasket (802) is provided on the inner side of the corrugated groove (801). A corrugated rubber gasket (803) is provided on the inner side wall of the corrugated sealing gasket (802), and a sealing ring (804) is provided at the lower end of the corrugated rubber gasket (803).

6. A flow component, characterized in that: A mechanical seal structure comprising any one of claims 1 to 5, wherein the flow-through component comprises: The valve body is directly connected to the equipment and forms a flow channel for the medium to flow; Mechanical seal structure, used to seal between valve body and valve stem; The valve seat is installed on the valve body and forms a sealing pair with the opening and closing parts; Opening and closing parts are parts used to cut off or adjust the flow of media; Sealing surface, the opening and closing parts fit tightly against the valve seat, and are the two contact surfaces that act as a seal.

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