CN221054314U - Stainless steel seal assembly of regulating valve - Google Patents
Stainless steel seal assembly of regulating valve Download PDFInfo
- Publication number
- CN221054314U CN221054314U CN202322629245.8U CN202322629245U CN221054314U CN 221054314 U CN221054314 U CN 221054314U CN 202322629245 U CN202322629245 U CN 202322629245U CN 221054314 U CN221054314 U CN 221054314U
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- valve rod
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- sealing
- valve
- stainless steel
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 51
- 239000010935 stainless steel Substances 0.000 title claims abstract description 51
- 230000001105 regulatory effect Effects 0.000 title description 10
- 238000007789 sealing Methods 0.000 claims abstract description 130
- 229910001369 Brass Inorganic materials 0.000 claims description 14
- 239000010951 brass Substances 0.000 claims description 14
- 238000010030 laminating Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims 4
- 230000000694 effects Effects 0.000 abstract description 23
- 230000007246 mechanism Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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Abstract
The utility model discloses a stainless steel sealing component of an adjusting valve, which relates to the technical field of adjusting valves and comprises a sealing plate device, wherein a valve rod sealing device is arranged at the upper end of the sealing plate device, a valve rod fixing component is arranged at the upper end of the valve rod sealing device, a through hole is formed in the middle of the valve rod sealing device and the valve rod fixing component, a valve rod is arranged in the through hole, a rotating disc is arranged at the upper end of the valve rod, a disc plate is arranged at the lower end of the valve rod, and a valve body is arranged outside the disc plate. The valve rod is an important part for driving the opening and closing piece of the disc plate to open and close, and is a part which is most easy to leak because the valve rod is a movable piece, the valve rod sealing device is arranged between the valve rod and the valve body, the sealing effect between the valve rod and the valve body can be ensured, when the disc plate is closed, the side surfaces of the two ends of the disc plate are attached to the sealing plate device, and the sealing effect of the disc plate when the disc plate is closed can be improved from the mechanism.
Description
Technical Field
The utility model relates to the technical field of regulating valves, in particular to a stainless steel sealing assembly of a regulating valve.
Background
The butterfly valve is also called as a flap valve, and is a regulating valve with a simple structure, and can be used for controlling the flow of various fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. Butterfly valves mainly play a role in cutting off and throttling on pipelines. The opening and closing piece of the butterfly valve is a disc-shaped butterfly plate (also called a disc flap), and the disc plate rotates around the axis of the butterfly valve in the valve body, so that the purpose of opening and closing or adjusting is achieved. The valve rod is an important part for driving the opening and closing part to open and close the valve, and is a part which is most easy to leak because the valve rod is a movable part. Thus, valve stem sealing is very important for valves. The following problems exist in the prior art:
1. The existing stainless steel sealing assembly of the regulating valve usually uses a sealing ring or a sealing sleeve and the like to ensure the sealing effect, and the sealing effect is poor if the sealing effect is required to be frequently replaced after the stainless steel sealing assembly is used for a long time;
2. the existing regulating valve stainless steel sealing component can gradually open a gap due to the impact of water flow or water pressure when the regulating valve is in a long-time closed state, and the closed sealing effect of the regulating valve cannot be guaranteed.
Disclosure of utility model
In order to solve the technical problems, the utility model adopts the following technical scheme:
The utility model provides a governing valve stainless steel seal assembly, includes closing plate device, closing plate device's upper end is provided with valve rod sealing device, valve rod sealing device's upper end is provided with valve rod fixed subassembly, valve rod sealing device and valve rod fixed subassembly's middle part is provided with the through-hole, and is provided with the valve rod in the through-hole, the upper end of valve rod is provided with the rolling disc, the lower extreme of valve rod is provided with the dish board, the outside of dish board is provided with the valve body.
The technical scheme of the utility model is further improved as follows: the sealing plate device comprises a sealing plate a, a fixed ring a is arranged on one side of the sealing plate a, a sealing ring is arranged on the connecting surface of the sealing plate a, the fixed ring a and the valve body, a sealing plate b and a fixed ring b are arranged on the other side of the butterfly plate, and the position relationship between the sealing plate b and the fixed ring b is the same as that between the sealing plate a and the fixed ring a.
The technical scheme of the utility model is further improved as follows: the upper end of the sealing plate a is fixedly connected with the lower end of the valve rod sealing device, the side end of the sealing plate a is fixedly connected with the fixed ring a, the side surfaces of the sealing plate a and the fixed ring a are fixedly connected with the sealing ring, the sealing ring is tightly pressed and attached to the inner wall of the valve body, the structure of the sealing plate b is identical to that of the sealing plate a, and the structure of the fixed ring b is identical to that of the fixed ring a.
The technical scheme of the utility model is further improved as follows: the valve rod sealing device comprises a stainless steel plug body, a valve rod is arranged in the stainless steel plug body, a brass retainer ring and an O-shaped ring are sequentially arranged on the connecting surface of the stainless steel plug body and the valve rod from top to bottom, a gasket is arranged at the lower end of the stainless steel plug body, and a threaded portion is arranged at the bottom of the stainless steel plug body.
The technical scheme of the utility model is further improved as follows: the outer wall of brass retainer ring is fixedly connected with the stainless steel plug body, the inner wall of the brass retainer ring is attached to the outer wall of the valve rod, the O-shaped ring is sleeved on the valve rod, the gasket is fixedly connected with the stainless steel plug body, and the threaded portion is fixedly connected with the stainless steel plug body.
The technical scheme of the utility model is further improved as follows: the valve rod fixing assembly comprises a mounting plate, the upper end of mounting plate is provided with connecting sleeve, the lower extreme and the valve rod sealing device fixed connection of mounting plate, connecting sleeve's upper end is provided with the connecting piece, one side of connecting piece is provided with the retaining member, the retaining member half surrounds the valve rod and the opening part is provided with the curb plate, two be provided with the butterfly bolt between the curb plate, mounting plate, connecting sleeve, connecting piece and retaining member's middle part all is provided with the through-hole that is used for installing the valve rod.
The technical scheme of the utility model is further improved as follows: the lower extreme and the mounting panel fixed connection of connecting sleeve, connecting sleeve's upper end and connecting piece's lower extreme fixed connection, connecting piece and retaining member fixed connection, retaining member and curb plate fixed connection, curb plate and butterfly bolt screw-thread fit connection.
By adopting the technical scheme, compared with the prior art, the utility model has the following technical progress:
1. The utility model provides a stainless steel seal assembly of an adjusting valve, which is characterized in that a valve rod is an important part for driving a butterfly plate of an opening and closing part to open and close under the combined action of a seal plate a, a fixed ring a, a seal ring, a seal plate b and the fixed ring b, because the valve rod is a movable part, the valve rod is the part which is most prone to leakage, a valve rod seal device is arranged between the valve rod and the valve body, the seal effect between the valve rod and the valve body can be ensured, when the butterfly plate is closed, both end side surfaces of the butterfly plate are attached to the seal plate device, the seal effect when the butterfly plate is closed can be improved, the position of the valve rod can be locked by the valve rod fixing assembly at the upper end after the butterfly plate is closed, the sealing performance of the valve can be ensured to be ensured by the fact that the butterfly plate is opened again due to the flushing of water pressure or water flow in the valve, the sealing performance of the valve in the closed state can be ensured by the arrangement, when the butterfly plate is closed, one surface of the butterfly plate is attached to the inner wall of the valve body, the sealing effect can be improved, and the soft seal layer is arranged at the position between the seal plate a and the seal plate, when the sealing plate is closed, and the sealing effect is ensured, and the joint effect between the sealing plate a is ensured.
2. The utility model provides a stainless steel sealing component of an adjusting valve, which is characterized in that under the combined action of a stainless steel plug body, a gasket, a brass retainer ring, an O-shaped ring and a threaded part, a valve rod sealing device is connected with a valve body through the threaded part at the bottom of the stainless steel plug body, the connection area of the threaded part can be increased, the sealing effect of the valve rod can be improved, and when the valve rod rotates, the outer wall and the brass retainer ring are attached to the O-shaped ring, so that water in the valve cannot overflow from a movable part, and meanwhile, the arrangement does not influence the rotation of the valve rod.
3. The utility model provides a stainless steel sealing component of an adjusting valve, which can lock a valve rod to prevent the valve rod from rotating again to change the flow rate in the valve through the arrangement of a valve rod fixing component after the valve rod rotates under the combined action of a mounting plate, a connecting sleeve, a connecting piece, a locking piece, a side plate and a butterfly bolt.
Drawings
FIG. 1 is a schematic structural view of a regulator valve stainless steel seal assembly of the present utility model;
FIG. 2 is a schematic structural view of a regulator valve stainless steel seal assembly of the present utility model;
FIG. 3 is a schematic structural view of a sealing plate device according to the present utility model;
FIG. 4 is a schematic top view of a seal plate apparatus of the present utility model;
FIG. 5 is a schematic illustration of the valve stem seal of the present utility model;
FIG. 6 is a schematic view of the valve stem securing assembly of the present utility model.
In the figure: 1. a sealing plate means; 2. a valve stem seal; 3. a valve stem securing assembly; 4. a valve stem; 5. a dish plate; 6. a valve body; 101. a sealing plate a; 102. a fixed ring a; 103. a seal ring; 104. a sealing plate b; 105. a fixing ring b; 21. a stainless steel corking body; 22. a gasket; 23. a brass retainer ring; 24. an O-ring; 25. a threaded portion; 31. a mounting plate; 32. a connecting sleeve; 33. a connecting piece; 34. a locking member; 35. a side plate; 36. a butterfly bolt.
Detailed Description
The utility model is further illustrated by the following examples:
Example 1
As shown in fig. 1-6, the utility model provides a stainless steel seal assembly of an adjusting valve, which comprises a sealing plate device 1, wherein a valve rod sealing device 2 is arranged at the upper end of the sealing plate device 1, a valve rod fixing assembly 3 is arranged at the upper end of the valve rod sealing device 2, through holes are formed in the middle parts of the valve rod sealing device 2 and the valve rod fixing assembly 3, a valve rod 4 is arranged in the through holes, a rotating disc is arranged at the upper end of the valve rod 4, a disc plate 5 is arranged at the lower end of the valve rod 4, and a valve body 6 is arranged outside the disc plate 5.
Example 2
As shown in fig. 1-6, on the basis of embodiment 1, the present utility model provides a technical solution: preferably, the sealing plate device 1 comprises a sealing plate a101, one side of the sealing plate a101 is provided with a fixed ring a102, a sealing ring 103 is arranged on a connecting surface between the sealing plate a101 and the fixed ring a102 and the valve body 6, the other side of the dishing plate 5 is provided with a sealing plate b104 and a fixed ring b105, the position relationship between the sealing plate b104 and the fixed ring b105 is the same as that between the sealing plate a101 and the fixed ring a102, the upper end of the sealing plate a101 is fixedly connected with the lower end of the valve rod sealing device 2, the side end of the sealing plate a101 is fixedly connected with the fixed ring a102, the side surfaces of the sealing plate a101 and the fixed ring a102 are fixedly connected with the sealing ring 103, the sealing ring 103 is tightly pressed and attached to the inner wall of the valve body 6, the structure of the sealing plate b104 is the same as that of the sealing plate a101, and the structure of the fixed ring b105 is the same as that of the fixed ring a 102.
In the embodiment, the valve rod 4 is an important part for driving the opening and closing member disc plate 5 to open and close, because the valve rod 4 is a movable member, the valve rod sealing device 2 is arranged between the valve rod 4 and the valve body 6, the sealing effect between the valve rod 4 and the valve body 6 can be ensured, when the disc plate 5 is closed, the side surfaces of the two ends of the disc plate 5 are attached to the sealing plate device 1, the sealing effect can be improved from the mechanism, the position of the valve rod 4 can be locked by the valve rod fixing component 3 at the upper end after the disc plate 5 is closed, the disc plate 5 in the valve is prevented from being opened again due to the water pressure in the valve or the water flow flushing, the sealing performance of the valve in the closed state can be ensured by the arrangement, when the dish board 5 is closed, the inner wall laminating of the lateral wall of dish board 5 and valve body 6, the one side of dish board 5 is laminated with closing plate a101 simultaneously, this setting can increase sealing area and improve sealed effect, and the laminating department of closing plate a101 is provided with the soft sealing layer of one deck, can guarantee to have the gap with the laminating department of dish board 5, be provided with sealing ring 103 between closing plate a101 and the inner wall of valve body 6, can guarantee the sealed effect of the junction of closing plate device 1 and valve body 6, because closing plate a101 and closing plate b104 distribute in the two sides of dish board 5, closing plate a101 and the closing plate b104 of the other end when the laminating of dish board 5 are same with the laminating of dish board 5, the airtight effect when improving dish board 5 and closing.
Example 3
As shown in fig. 1-6, on the basis of embodiment 1, the present utility model provides a technical solution: preferably, the valve rod sealing device 2 comprises a stainless steel plug body 21, a valve rod 4 is arranged in the stainless steel plug body 21, a brass retainer ring 23 and an O-shaped ring 24 are sequentially arranged on the connecting surface of the stainless steel plug body 21 and the valve rod 4 from top to bottom, a gasket 22 is arranged at the lower end of the stainless steel plug body 21, a threaded portion 25 is arranged at the bottom of the stainless steel plug body 21, the outer wall of the brass retainer ring 23 is fixedly connected with the stainless steel plug body 21, the inner wall of the brass retainer ring 23 is attached to the outer wall of the valve rod 4, the O-shaped ring 24 is sleeved on the valve rod 4, the gasket 22 is fixedly connected with the stainless steel plug body 21, and the threaded portion 25 is fixedly connected with the stainless steel plug body 21.
In this embodiment, the valve stem sealing device 2 is connected with the valve body 6 through the threaded portion 25 at the bottom of the stainless steel plunger body 21, the connection area through the threaded portion 25 can be increased, the sealing effect at the valve stem 4 can be improved, when the valve stem 4 rotates, water in the valve cannot overflow from the movable place due to the fact that the outer wall and the brass retainer ring 23 are attached to the O-shaped ring 24, and meanwhile the rotation of the valve stem 4 is not affected by the arrangement.
Example 4
As shown in fig. 1-6, on the basis of embodiment 1, the present utility model provides a technical solution: preferably, the valve rod fixing assembly 3 comprises a mounting plate 31, a connecting sleeve 32 is arranged at the upper end of the mounting plate 31, the lower end of the mounting plate 31 is fixedly connected with the valve rod sealing device 2, a connecting piece 33 is arranged at the upper end of the connecting sleeve 32, a locking piece 34 is arranged on one side of the connecting piece 33, the locking piece 34 semi-surrounds the valve rod 4 and is provided with side plates 35 at the opening, a butterfly bolt 36 is arranged between the two side plates 35, through holes for mounting the valve rod 4 are formed in the middle parts of the mounting plate 31, the connecting sleeve 32, the connecting piece 33 and the locking piece 34, the lower end of the connecting sleeve 32 is fixedly connected with the mounting plate 31, the upper end of the connecting sleeve 32 is fixedly connected with the lower end of the connecting piece 33, the connecting piece 33 is fixedly connected with the locking piece 34, the locking piece 34 is fixedly connected with the side plates 35, and the side plates 35 are in threaded fit with the butterfly bolts 36.
The working principle of the stainless steel seal assembly of the regulating valve is specifically described below.
When the device is used, as shown in fig. 1-6, the valve rod 4 is an important part for driving the opening and closing member disc plate 5 to open and close, because the valve rod 4 is a movable part and is the part which is most easy to generate leakage, the valve rod sealing device 2 is arranged between the valve rod 4 and the valve body 6, the sealing effect between the valve rod 4 and the valve body 6 can be ensured, when the disc plate 5 is closed, the two end side surfaces of the disc plate 5 are both jointed with the sealing plate device 1, the sealing effect when the disc plate 5 is closed can be improved mechanically, the position of the valve rod 4 can be locked through the valve rod fixing component 3 at the upper end after the disc plate 5 is closed, the disc plate 5 in the valve can be prevented from being opened again due to water pressure or water flow in the valve, the sealing performance of the valve in the closed state can be ensured through the arrangement, when the disc plate 5 is closed, the side walls of the disc plate 5 are jointed with the inner wall of the valve body 6, meanwhile, one surface of the dish plate 5 is attached to the sealing plate a101, the sealing effect can be improved by increasing the sealing area, a soft sealing layer is arranged at the attaching position of the sealing plate a101, no gap is formed between the attaching position of the sealing plate a101 and the dish plate 5, a sealing ring 103 is arranged between the sealing plate a101 and the inner wall of the valve body 6, the sealing effect of the connecting position of the sealing plate device 1 and the valve body 6 can be ensured, as the sealing plate a101 and the sealing plate b104 are distributed on two surfaces of the dish plate 5, the sealing plate b104 at the other end is attached to the dish plate 5 when the sealing plate a101 is attached to the dish plate 5, the sealing effect of the dish plate 5 when the dish plate 5 is closed is improved, the valve rod sealing device 2 is connected with the valve body 6 through the threaded part 25 at the bottom of the stainless steel plug body 21, the sealing effect of the valve rod 4 can be improved by increasing the connecting area through the connection of the threaded part 25, and the outer wall and the brass retainer ring 23 are attached to the O-shaped ring 24 when the valve rod 4 rotates, the water in the valve can not overflow from the movable part and the setting does not influence the rotation of the valve rod 4, after the valve rod 4 rotates, the valve rod 4 can be locked through the setting of the valve rod fixing assembly 3 to prevent the valve rod 4 from rotating again to change the flow velocity in the valve, the locking operation is to change the distance between two side plates 35 through rotating the butterfly bolt 36, the distance between the side plates 35 and the two ends of the side plates 35 and the locking piece 34 are fixedly connected, the distance between the side plates 35 is reduced to reduce the inner diameter of the locking piece 34, the locking piece 34 is locked by the setting, the valve rod 4 is prevented from rotating again, and the mounting plate 31 at the bottom is fixedly connected with the valve rod sealing device 2 at the lower end, so that the tightness between the valve rod 4 and the valve body 6 can not be influenced.
The foregoing utility model has been generally described in great detail, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, it is intended to cover modifications or improvements within the spirit of the inventive concepts.
Claims (7)
1. The utility model provides a governing valve stainless steel seal assembly, includes closing plate arrangement (1), its characterized in that: the sealing plate device is characterized in that a valve rod sealing device (2) is arranged at the upper end of the sealing plate device (1), a valve rod fixing assembly (3) is arranged at the upper end of the valve rod sealing device (2), a through hole is formed in the middle of the valve rod sealing device (2) and the valve rod fixing assembly (3), a valve rod (4) is arranged in the through hole, a rotating disc is arranged at the upper end of the valve rod (4), a disc plate (5) is arranged at the lower end of the valve rod (4), and a valve body (6) is arranged outside the disc plate (5).
2. The regulator valve stainless steel seal assembly of claim 1, wherein: the sealing plate device (1) comprises a sealing plate a (101), a fixed ring a (102) is arranged on one side of the sealing plate a (101), a sealing ring (103) is arranged on the connecting surface of the sealing plate a (101) and the fixed ring a (102) and a valve body (6), a sealing plate b (104) and a fixed ring b (105) are arranged on the other side of the dish plate (5), and the position relation between the sealing plate b (104) and the fixed ring b (105) is the same as the position relation between the sealing plate a (101) and the fixed ring a (102).
3. A regulator valve stainless steel seal assembly as defined in claim 2, wherein: the upper end of closing plate a (101) is fixedly connected with the lower extreme of valve rod sealing device (2), the side of closing plate a (101) is fixedly connected with solid fixed ring a (102), the side of closing plate a (101) and solid fixed ring a (102) all with sealing ring (103) fixed connection, sealing ring (103) compress tightly the laminating with the inner wall of valve body (6), the structure of closing plate b (104) is the same with closing plate a (101), the structure of solid fixed ring b (105) is the same with solid fixed ring a (102).
4. The regulator valve stainless steel seal assembly of claim 1, wherein: the valve rod sealing device (2) comprises a stainless steel plug body (21), a valve rod (4) is arranged in the stainless steel plug body (21), a brass retainer ring (23) and an O-shaped ring (24) are sequentially arranged on the connecting surface of the stainless steel plug body (21) and the valve rod (4) from top to bottom, a gasket (22) is arranged at the lower end of the stainless steel plug body (21), and a threaded portion (25) is arranged at the bottom of the stainless steel plug body (21).
5. The regulator valve stainless steel seal assembly of claim 4, wherein: the outer wall of brass retainer ring (23) is fixedly connected with stainless steel plug body (21), the inner wall of brass retainer ring (23) is attached to the outer wall of valve rod (4), O-shaped ring (24) is sleeved on valve rod (4), gasket (22) is fixedly connected with stainless steel plug body (21), and threaded portion (25) is fixedly connected with stainless steel plug body (21).
6. The regulator valve stainless steel seal assembly of claim 1, wherein: the valve rod fixing assembly (3) comprises a mounting plate (31), the upper end of the mounting plate (31) is provided with a connecting sleeve (32), the lower end of the mounting plate (31) is fixedly connected with a valve rod sealing device (2), the upper end of the connecting sleeve (32) is provided with a connecting piece (33), one side of the connecting piece (33) is provided with a locking piece (34), the locking piece (34) semi-surrounds the valve rod (4) and the opening part is provided with a side plate (35), two butterfly bolts (36) are arranged between the side plates (35), and through holes for mounting the valve rod (4) are formed in the middle parts of the mounting plate (31), the connecting sleeve (32), the connecting piece (33) and the locking piece (34).
7. The regulator valve stainless steel seal assembly of claim 6, wherein: the lower extreme and mounting panel (31) fixed connection of connecting sleeve (32), the upper end and the lower extreme fixed connection of connecting piece (33) of connecting sleeve (32), connecting piece (33) and retaining member (34) fixed connection, retaining member (34) and curb plate (35) fixed connection, curb plate (35) and butterfly bolt (36) screw-thread fit connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322629245.8U CN221054314U (en) | 2023-09-26 | 2023-09-26 | Stainless steel seal assembly of regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322629245.8U CN221054314U (en) | 2023-09-26 | 2023-09-26 | Stainless steel seal assembly of regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221054314U true CN221054314U (en) | 2024-05-31 |
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ID=91204498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322629245.8U Active CN221054314U (en) | 2023-09-26 | 2023-09-26 | Stainless steel seal assembly of regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221054314U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120351327A (en) * | 2025-05-21 | 2025-07-22 | 河南泉舜流体控制科技有限公司 | Heavy-calibre butterfly valve with self-closing function |
-
2023
- 2023-09-26 CN CN202322629245.8U patent/CN221054314U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120351327A (en) * | 2025-05-21 | 2025-07-22 | 河南泉舜流体控制科技有限公司 | Heavy-calibre butterfly valve with self-closing function |
| CN120351327B (en) * | 2025-05-21 | 2025-10-14 | 河南泉舜流体控制科技有限公司 | Heavy-calibre butterfly valve with self-closing function |
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