Valve rod sealing structure convenient to disassemble

Abstract

The utility model discloses a valve rod sealing structure convenient to disassemble. The valve rod sealing structure comprises a mounting seat, a base, a gland, a valve rod and at least one sealing ring, a sealing channel is arranged in the installation seat, the valve rod penetrates through the sealing channel, the sealing ring is installed in the sealing channel and arranged on the outer side of the valve rod in a sleeved mode, and the base is detachably connected to one end of the installation seat. The base is provided with a supporting step part which protrudes out of the inner wall of the sealing channel inwards in the radial direction, a first through hole is formed in the inner side of the supporting step part, the valve rod penetrates through the first through hole, and the gland is detachably connected to the other end of the installation base. At least one part of the gland extends into the sealing channel to abut against the sealing ring and tightly press the sealing ring on the supporting step part. According to the sealing ring dismounting device, the convenience of dismounting the sealing ring can be improved, the dismounting efficiency of the sealing ring is improved, and the time for replacing the sealing ring can be saved.

Description

Technical Field

[0001] The utility model relates to a valve stem sealing structure which is convenient to disassemble. Background Art

[0002] At present, a bag filter is one of the conventional flue gas dust removal devices, and the cleaning chamber therein is the main working chamber. The lifting valve is located in the cleaning chamber and is used to control the opening and closing of the cleaning chamber. In the existing lifting valve, a sealing ring is pressed on the valve stem to seal the valve stem, thereby preventing leakage at the valve stem. However, the sealing ring will age and wear after being used for a period of time, so it needs to be replaced regularly. However, it is very difficult to disassemble and remove the sealing ring in the existing lifting valve. For example, in a Chinese patent with the publication number CN218761428U, a lifting valve for waste gas treatment is disclosed, in which the sealing ring is pressed on the second mounting seat by the first mounting seat to seal the valve stem. However, when replacing the sealing ring, it is very difficult to remove the sealing ring from the second mounting seat, resulting in inconvenient disassembly of the sealing ring and affecting the efficiency of replacing the sealing ring. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a valve stem sealing structure which is convenient to disassemble. It can improve the convenience of disassembling the sealing ring, improve the disassembly efficiency of the sealing ring, and thus save the time for replacing the sealing ring.

[0004] To solve the above technical problem, the technical solution of the utility model is: a valve stem sealing structure which is convenient to disassemble, comprising a mounting seat, a base, a gland, a valve stem and at least one sealing ring;

[0005] A sealing channel is provided in the mounting seat;

[0006] The valve stem passes through the sealing channel;

[0007] The sealing ring is installed in the sealing channel and sleeved on the outer side of the valve stem;

[0008] The base is detachably connected to one end of the mounting seat. The base is provided with a support step portion that protrudes radially inward from the inner wall of the sealing channel. A first through hole is provided inside the support step portion, and the valve stem passes through the first through hole;

[0009] The gland is detachably connected to the other end of the mounting seat. At least a part of the gland extends into the sealing channel to abut against the sealing ring and presses the sealing ring against the support step portion.

[0010] Further, in order to improve the sealing performance, a plurality of sealing rings are stacked along the axial direction of the valve stem.

[0011] Further, a second through hole is provided in the gland, and the valve stem passes through the second through hole.

[0012] Further, a pressing ring portion is provided on the gland, and the pressing ring portion extends into the sealing channel to abut against the sealing ring and press the sealing ring tightly against the supporting step portion.

[0013] Further, a first flange portion extending radially outward is provided on the gland;

[0014] A second flange portion extending radially outward is provided on the mounting seat;

[0015] The first flange portion is detachably connected to the second flange portion by a first fastening member.

[0016] Further, a third flange portion extending radially outward is provided on the mounting seat, and the third flange portion is detachably connected to the base by a second fastening member.

[0017] Further, the sealing ring is a graphite sealing ring.

[0018] Further, the base is used to be connected to the top plate of the equipment.

[0019] Further, a third through hole for the valve stem to pass through is provided on the top plate of the equipment.

[0020] Further, the base is welded to the top plate of the equipment.

[0021] After adopting the above technical solution, after the gland presses the sealing ring tightly against the supporting step portion, the sealing ring abuts and seals against the gland and the supporting step portion respectively, and the pressed sealing ring will also deform, so that the inner side of the sealing ring abuts and seals against the valve stem and the outer side of the sealing ring abuts and seals against the inner wall of the sealing channel, thereby forming an effective and reliable seal at the valve stem to prevent leakage problems. Among them, when the sealing ring needs to be replaced due to wear and aging after being used for a period of time, the gland is detached from the mounting seat, and at the same time the mounting seat is detached from the base, and then the valve stem is pulled out from the sealing channel. At this time, it is very convenient to eject the sealing ring from the sealing channel, improving the convenience of disassembling the sealing ring and the disassembly efficiency of the sealing ring, thereby making it more convenient to replace the sealing ring and saving the time for replacing the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the valve stem sealing structure with convenient disassembly of the present invention;

[0023] Figure 2Schematic diagram of the mounting seat and sealing ring of the present utility model. Detailed implementation manners

[0024] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments and in conjunction with the accompanying drawings.

[0025] As Figure 1 、 2 shown, a valve stem sealing structure with convenient disassembly includes a mounting seat 1, a base 2, a gland 3, a valve stem 4 and at least one sealing ring 5;

[0026] A sealing channel 6 is provided in the mounting seat 1, and the valve stem 4 passes through the sealing channel 6;

[0027] The sealing ring 5 is installed in the sealing channel 6 and sleeved outside the valve stem 4;

[0028] The base 2 is detachably connected to one end of the mounting seat 1. A support step portion 7 protruding radially inward from the inner wall of the sealing channel 6 is provided on the base 2. A first through hole 8 is provided inside the support step portion 7, and the valve stem 4 passes through the first through hole 8;

[0029] The gland 3 is detachably connected to the other end of the mounting seat 1. At least a part of the gland 3 extends into the sealing channel 6 to abut against the sealing ring 5 and presses the sealing ring 5 against the support step portion 7. Specifically, after the gland 3 presses the sealing ring 5 against the support step portion 7, the sealing ring 5 abuts and seals against the gland 3 and the support step portion 7 respectively, and the compressed sealing ring 5 will also be deformed so that the inner side of the sealing ring 5 abuts and seals against the valve stem 4 and the outer side of the sealing ring 5 abuts and seals against the inner wall of the sealing channel 6, thereby forming an effective and reliable seal at the valve stem 4 to prevent leakage problems.

[0030] Further specifically, when the sealing ring 5 needs to be replaced due to wear and aging after being used for a period of time, the gland 3 is detached from the mounting seat 1, and at the same time the mounting seat 1 is detached from the base 2, and then the valve stem 4 is pulled out from the sealing channel 6. At this time, as Figure 2 shown, the sealing ring 5 can be very conveniently ejected from the sealing channel 6, improving the convenience of disassembling the sealing ring 5, improving the disassembly efficiency of the sealing ring 5, and further making it more convenient to replace the sealing ring 5, saving the time for replacing the sealing ring 5.

[0031] As Figure 1 、 2As shown, a plurality of the sealing rings 5 are stacked along the axial direction of the valve stem 4; specifically, by providing a plurality of the sealing rings 5, the sealing surfaces between the sealing rings 5 and the valve stem 4 and between the sealing rings 5 and the mounting seat 1 can be increased, and thus a better sealing effect can be obtained; in this embodiment, 5 sealing rings 5 are stacked.

[0032] As Figure 1 shown, a second through hole 9 is provided in the gland 3, and the valve stem 4 passes through the second through hole 9.

[0033] As Figure 1 shown, a pressing ring portion 10 may be provided on the gland 3, and the pressing ring portion 10 extends into the sealing channel 6 to abut against the sealing ring 5 and press the sealing ring 5 tightly against the supporting step portion 7; specifically, after the sealing ring 5 is pressed tightly, the upper end surface of the uppermost sealing ring 5 abuts and seals against the lower end surface of the pressing ring portion 10, the lower end surface of the lowermost sealing ring 5 abuts and seals against the supporting step portion 7, the inner side of the sealing ring 5 abuts and seals against the valve stem 4, and the outer side of the sealing ring 5 abuts and seals against the inner wall of the sealing channel 6. Among them, the second through hole 9 is located inside the pressing ring portion 10.

[0034] As Figure 1 、 2 shown, a first flange portion 11 extending radially outward is provided on the gland 3, a second flange portion 12 extending radially outward is provided on the mounting seat 1, and the first flange portion 11 is detachably connected to the second flange portion 12 through a first fastener 13, so that the gland 3 is detachably connected to the mounting seat 1; specifically, by removing the first fastener 13, the first flange portion 11 and the second flange portion 12 can be disassembled, and thus the gland 3 can be removed from the mounting seat 1.

[0035] More specifically, the tightness of the seal can be flexibly adjusted by adjusting the tightness of the first fastener 13. The tighter the first fastener 13 is screwed, the tighter the pressing ring portion 10 presses the sealing ring 5, the tighter the seal, and at the same time, the greater the friction force between the valve stem 4 and the sealing ring 5, and the faster the sealing ring 5 wears. On the contrary, if the first fastener 13 is loosened, the pressing ring portion 10 presses the sealing ring 5 more loosely, the tightness of the seal decreases, and at the same time, the friction force between the valve stem 4 and the sealing ring 5 becomes smaller, and the wear of the sealing ring 5 becomes smaller. Therefore, it is necessary to adjust the tightness of the first fastener 13 according to the actual situation to flexibly adjust the tightness of the seal.

[0036] As Figure 1 、 2As shown, a third flange portion 14 extending radially outward is provided on the mounting base 1, and the third flange portion 14 is detachably connected to the base 2 through a second fastener 15; specifically, by removing the second fastener 15, the third flange portion 14 can be detached from the base 2, and thus the entire mounting base 1 can be detached from the base 2; in this embodiment, both the first fastener 13 and the second fastener 15 can be bolts and nuts.

[0037] In this embodiment, the sealing ring 5 is a graphite sealing ring 5.

[0038] As Figure 1 shown, the base 2 is used to be connected to the equipment top plate 16, and a third through hole 17 for the valve stem 4 to pass through is provided on the equipment top plate 16; in this embodiment, the base 2 and the equipment top plate 16 are connected by welding.

[0039] In summary, after the gland 3 presses the sealing ring 5 against the support step portion 7, the sealing ring 5 is in tight contact and sealed with the gland 3 and the support step portion 7 respectively, and the pressed sealing ring 5 will also deform, so that the inner side of the sealing ring 5 is in tight contact and sealed with the valve stem 4, and the outer side of the sealing ring 5 is in tight contact and sealed with the inner wall of the sealing channel 6, thereby forming an effective and reliable seal at the valve stem 4 to prevent leakage problems. Among them, when the sealing ring 5 needs to be replaced due to wear and aging after being used for a period of time, the gland 3 is detached from the mounting base 1, and at the same time the mounting base 1 is detached from the base 2, and then the valve stem 4 is pulled out from the sealing channel 6. At this time, the sealing ring 5 can be very conveniently ejected from the sealing channel 6, improving the convenience of detaching the sealing ring 5, improving the disassembly efficiency of the sealing ring 5, and thus making it more convenient to replace the sealing ring 5 and saving the time for replacing the sealing ring 5.

[0040] The specific embodiments described above further elaborate on the technical problems solved, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only specific embodiments of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A valve stem sealing structure that is convenient to disassemble, characterized in that, It includes a mounting base (1), a base (2), a gland (3), a valve stem (4) and at least one sealing ring (5); A sealing channel (6) is provided in the mounting base (1); The valve stem (4) passes through the sealing channel (6); The sealing ring (5) is installed in the sealing channel (6) and sleeved on the outer side of the valve stem (4); The base (2) is detachably connected to one end of the mounting base (1). A supporting step portion (7) protruding radially inwards from the inner wall of the sealing channel (6) is provided on the base (2). A first through hole (8) is provided inside the supporting step portion (7), and the valve stem (4) passes through the first through hole (8); The gland (3) is detachably connected to the other end of the mounting base (1). At least a part of the gland (3) extends into the sealing channel (6) to abut against the sealing ring (5) and presses the sealing ring (5) against the supporting step portion (7).

2. The valve stem sealing structure with convenient disassembly according to claim 1, characterized in that, A plurality of the sealing rings (5) are stacked along the axial direction of the valve stem (4).

3. The valve stem sealing structure with convenient disassembly according to claim 1, characterized in that A second through hole (9) is provided in the gland (3), and the valve stem (4) passes through the second through hole (9).

4. The valve stem sealing structure with convenient disassembly according to claim 1, characterized in that, A pressing ring portion (10) is provided on the gland (3), and the pressing ring portion (10) extends into the sealing channel (6) to abut against the sealing ring (5) and presses the sealing ring (5) against the supporting step portion (7).

5. The valve stem sealing structure with convenient disassembly according to claim 1, characterized in that A first flange portion (11) extending radially outwards is provided on the gland (3); A second flange portion (12) extending radially outwards is provided on the mounting base (1); The first flange portion (11) is detachably connected to the second flange portion (12) by a first fastener (13).

6. The valve stem sealing structure with convenient disassembly according to claim 1, characterized in that, A third flange portion (14) extending radially outwards is provided on the mounting base (1), and the third flange portion (14) is detachably connected to the base (2) by a second fastener (15).

7. The valve stem sealing structure with convenient disassembly according to claim 1, characterized in that, The sealing ring (5) is a graphite sealing ring (5).

8. The valve stem sealing structure with convenient disassembly according to claim 1, characterized in that The base (2) is used for connecting to the equipment top plate (16).

9. The valve stem sealing structure with convenient disassembly according to claim 8, characterized in that, A third through hole (17) for the valve stem (4) to pass through is provided on the equipment top plate (16).

10. The valve stem sealing structure with convenient disassembly according to claim 8, characterized in that, The base (2) is connected to the equipment top plate (16) by welding.

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