CN216382601U - Novel welded valve cover stop valve - Google Patents
Novel welded valve cover stop valve Download PDFInfo
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- CN216382601U CN216382601U CN202122872468.8U CN202122872468U CN216382601U CN 216382601 U CN216382601 U CN 216382601U CN 202122872468 U CN202122872468 U CN 202122872468U CN 216382601 U CN216382601 U CN 216382601U
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- valve
- cover
- flow passage
- stop
- valve cover
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Abstract
The utility model relates to the field of high-temperature and high-pressure stop valves, and particularly discloses a novel welded type valve cover stop valve which comprises a valve body, a valve seat, a valve clack, a valve rod, a valve cover and a hand wheel, wherein the valve seat is arranged in the valve body; a packing area is arranged between the inner side of the top end of the valve cover and the valve rod, and a packing gland is arranged above the packing area. The utility model has simple structure, can be suitable for various high-temperature and high-pressure environments, solves the problem that the filler area is easy to damage due to direct contact with a medium, and improves the service life of the stop valve and the safety of online replacement of the filler area.
Description
Technical Field
The utility model relates to the field of high-temperature and high-pressure stop valves, in particular to a novel welded valve cover stop valve.
Background
At present, a packing area box of a stop valve is directly designed in a valve body, and the packing area is arranged in the valve body and is directly contacted with a medium; locate under the highly compressed operational environment of high temperature for a long time, pack the district and be damaged easily, pack district position and produce outer hourglass easily, it has caused inconvenience to change the filler district, and also can't promptly change the filler district on line in the operation use, valve gap and valve body mostly adopt the bolt to carry out fixed connection in addition, after using a period, the bolt produces fatigue relaxation easily, make the valve body and the joint portion of valve gap take place the leakage phenomenon easily, this is extremely dangerous potential safety hazard.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a novel welded type valve cover stop valve, which solves the problem that a packing area is easy to damage due to direct contact with a medium, ensures the safety of online replacement of the packing area, prevents leakage through the design of full-welding sealing after the valve cover is in threaded connection with a valve body, and prolongs the service life of the stop valve.
In order to solve the technical problems, the utility model provides a novel welded type valve cover stop valve which comprises a valve body, a valve seat, a valve clack, a valve rod, a valve cover and a hand wheel, wherein the valve seat is arranged in the valve body, the valve clack is arranged in the valve body, the lower end face of the valve clack and the valve seat form a conical reverse seal when the stop valve is in a closed state, the valve cover is arranged on the valve body, one end of the valve rod penetrates through the valve cover to be connected with the valve clack, the other end of the valve rod is connected with the hand wheel, the upper end and the lower end of the valve cover are both of an external thread structure, the upper end of the valve cover is connected with a support in a threaded connection mode, the lower end of the valve cover is connected with an internal thread at the end part of the valve body, and the contact surface of the valve cover and the valve body is welded and fixed;
and a packing area is arranged between the inner side of the top end of the valve cover and the valve rod, and a packing gland is arranged above the packing area.
Further, when the stop valve is in a fully opened state, the valve rod and the lower end face of the valve cover form a reverse seal.
Further, the packing gland and the support are fixed through nuts and bolts.
Further, a valve rod nut is arranged between the upper end of the support and the valve rod, and the valve rod nut is in threaded connection with the support.
Furthermore, a first flow passage and a second flow passage are arranged in the valve body, the first flow passage is arranged on the side face of the valve clack, and the second flow passage is arranged below the valve seat.
Further, the first flow passage is arranged obliquely upwards, and the second flow passage comprises a straight hole section and an oblique hole section which are communicated with each other and are inclined downwards.
The utility model has the beneficial effects that:
1. the packing gland extrudes the packing area downwards under the action of the nut and the bolt, and the packing area compresses and clasps the valve rod to form sealing between the valve rod and the valve cover.
2. When the stop valve is in a closed state, the lower end face of the valve clack and the valve seat form a conical inverted seal, and hard alloy is welded on the sealing surface in an overlaying mode, so that the strength of the sealing surface is enhanced, and the scouring resistance is improved.
3. When the stop valve is in a fully open state, the valve rod and the lower end face of the valve cover form a reverse seal, so that a packing area is prevented from being directly contacted with a medium, the packing area is protected, the service life of the valve is prolonged, and leakage points are reduced; when the packing area needs to be replaced, the packing area can be replaced on line only by loosening the nut and the bolt and removing the packing gland, so that the safety of replacing the packing area is improved, and the maintenance is convenient.
4. The lower end of the valve cover is connected with the internal thread at the end part of the valve body and then welded, so that the sealing performance is further improved, the leakage is prevented, and the service life of the valve is prolonged.
5. The utility model has simple structure, can be suitable for various high-temperature and high-pressure working environments, prolongs the service life of the valve and improves the safety of online replacement of the packing area.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a novel welding type valve cover stop valve in a valve closing state;
FIG. 2 is a schematic structural diagram of the novel welded bonnet stop valve of the present invention in a fully open state;
FIG. 3 is an enlarged view of portion A of the novel welded bonnet stop valve of the present invention;
in the figure: 1-valve body, 2-valve seat, 3-valve clack, 4-valve rod, 5-valve cover, 6-hand wheel, 7-support, 8-packing area, 9-packing gland, 10-nut, 11-bolt, 12-valve rod nut, 13-first flow passage and 14-second flow passage.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the specification of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In a specific embodiment of the utility model, as shown in fig. 1-3, a novel welded valve cover stop valve comprises a valve body 1, a valve seat 2, a valve flap 3, a valve rod 4, a valve cover 5 and a hand wheel 6, wherein the valve seat 2 is arranged in the valve body 1, the valve flap 3 is arranged in the valve body 1, when the stop valve is in a closed state, the lower end surface of the valve flap 3 and the valve seat 2 form a conical reverse seal, and a hard alloy layer is welded on the conical reverse seal surface in a surfacing mode, so that the scouring resistance is improved;
the valve cover 5 is arranged on the valve body 1, one end of the valve rod 4 penetrates through the valve cover 5 to be connected with the valve clack 3, the other end of the valve rod is connected with the hand wheel 6, the upper end and the lower end of the valve cover 5 are both of an external thread structure, the upper end of the valve cover 5 is connected with the support 7 in a threaded connection mode, the lower end of the valve cover 5 is connected with the internal thread at the end part of the valve body 1, the valve cover 5 is welded and fixed with the contact surface of the valve body 1, sealing is further achieved, leakage is prevented, and the service life of the valve is prolonged;
a first flow passage 13 and a second flow passage 14 are arranged in the valve body 1, the first flow passage 13 is arranged on the side face of the valve clack 3, the second flow passage 14 is arranged below the valve seat 2, the first flow passage 13 is arranged obliquely upwards, and the second flow passage 14 comprises a straight hole section and an oblique hole section which are communicated with each other and are inclined downwards.
A packing area 8 is arranged between the inner side of the top end of the valve cover 5 and the valve rod 4, a packing gland 9 is arranged above the packing area 8, the packing gland 9 and the support 7 are fixed through a nut 10 and a bolt 11, a valve rod nut 12 is arranged between the upper end of the support 7 and the valve rod 4, and the valve rod nut 12 is in threaded connection with the support 7; the packing gland 9 downwards extrudes the packing area 8 under the action of the nut 10 and the bolt 11, and the packing area 8 compresses and tightly holds the valve rod 4 to form sealing between the valve rod 4 and the valve cover 5.
When the stop valve is in a fully open state, the lower end faces of the valve rod 4 and the valve cover 5 form a reverse seal, so that the direct contact between the packing region 8 and a medium is avoided, the packing region 8 is protected, the service life of the valve is prolonged, and leakage points are reduced; when the packing area 8 needs to be replaced, the packing area 8 can be replaced on line only by loosening the nut 10 and the bolt 11 and removing the packing gland 9, so that the safety of replacing the packing area 8 is improved, and the maintenance is convenient.
The above disclosure is only one preferred embodiment of the present invention, and certainly should not be construed as limiting the scope of the utility model, which is defined by the claims and their equivalents.
Claims (6)
1. A novel welded valve cover stop valve comprises a valve body (1), a valve seat (2), a valve clack (3), a valve rod (4), a valve cover (5) and a hand wheel (6), wherein the valve seat (2) is arranged in the valve body (1), the valve clack (3) is arranged in the valve body (1), when the stop valve is in a closed state, the lower end face of the valve clack (3) and the valve seat (2) form a conical reverse seal, the valve cover (5) is arranged on the valve body (1), one end of the valve rod (4) penetrates through the valve cover (5) to be connected with the valve clack (3), the other end of the valve rod is connected with the hand wheel (6), and the novel welded valve cover stop valve is characterized in that,
the upper end and the lower end of the valve cover (5) are both of an external thread structure, the upper end of the valve cover (5) is connected with a support (7) in a threaded connection mode, the lower end of the valve cover is connected with an internal thread at the end part of the valve body (1), and the valve cover (5) is welded and fixed with a contact surface of the valve body (1);
a packing area (8) is arranged between the inner side of the top end of the valve cover (5) and the valve rod (4), and a packing gland (9) is arranged above the packing area (8).
2. A novel welded bonnet stop valve as claimed in claim 1, wherein the valve stem (4) forms a back seal with the lower end surface of the bonnet (5) when the stop valve is in the fully open state.
3. A novel welded bonnet stop valve as claimed in claim 1, wherein the gland (9) is secured to the support (7) by means of nuts (10) and bolts (11).
4. A novel welded bonnet stop valve as claimed in claim 1, wherein a stem nut (12) is provided between the upper end of the bracket (7) and the valve stem (4), and the stem nut (12) is in threaded connection with the bracket (7).
5. A novel welded bonnet stop valve as claimed in claim 1, wherein a first flow passage (13) and a second flow passage (14) are provided in the valve body (1), the first flow passage (13) is provided at the side of the valve flap (3), and the second flow passage (14) is provided below the valve seat (2).
6. A novel welded bonnet stop valve as claimed in claim 5, wherein the first flow passage (13) is arranged obliquely upwards, and the second flow passage (14) comprises a straight hole section and an oblique hole section which are communicated with each other and are inclined downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122872468.8U CN216382601U (en) | 2021-11-23 | 2021-11-23 | Novel welded valve cover stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122872468.8U CN216382601U (en) | 2021-11-23 | 2021-11-23 | Novel welded valve cover stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216382601U true CN216382601U (en) | 2022-04-26 |
Family
ID=81217872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122872468.8U Active CN216382601U (en) | 2021-11-23 | 2021-11-23 | Novel welded valve cover stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216382601U (en) |
-
2021
- 2021-11-23 CN CN202122872468.8U patent/CN216382601U/en active Active
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