CN210164915U - Small and medium drift diameter lifting type water hammer prevention stop valve - Google Patents
Small and medium drift diameter lifting type water hammer prevention stop valve Download PDFInfo
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- CN210164915U CN210164915U CN201921018785.XU CN201921018785U CN210164915U CN 210164915 U CN210164915 U CN 210164915U CN 201921018785 U CN201921018785 U CN 201921018785U CN 210164915 U CN210164915 U CN 210164915U
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Abstract
A middle and small drift diameter lifting type water hammer prevention stop valve comprises a valve body, a valve seat, a valve clack, a valve rod, a valve body upper cover, filler, a valve cover assembly and a hand wheel, wherein the valve rod penetrates through central pore passages of the valve cover assembly and the valve body upper cover from top to bottom, and an on-off channel of an inner cavity of the valve body is formed by the valve clack arranged at the front end part of the valve rod and the valve seat arranged in the inner cavity of the valve body; the lower seat body of the valve seat is additionally provided with a spring control sub-valve which is abutted against the valve seat, and the spring control sub-valve forms a second partition mechanism of the inner cavity of the valve body; the spring control sub-valve consists of a check valve clack, a cylindrical spring and a gasket, wherein the check valve clack is in a T-shaped structure, the upper plane of the check valve clack is abutted against the bottom of the valve clack, and a gasket is arranged between the check valve clack and the valve clack; the cylinder part of the T-shaped structure is provided with a discharge hole, and a cylindrical spring which takes the bottom of the valve body as a support is arranged at the outer side of the cylinder part; and a drain plug screw is arranged at the bottom of the valve body right below the T-shaped structure cylinder part of the check valve clack.
Description
Technical Field
The utility model relates to a valve, especially a waterproof hammer stop valve of medium and small latus rectum over-and-under type.
Background
In the liquid pipeline conveying operation, especially in the pipeline with high flow speed (more than or equal to 5m/s), when the liquid medium is cut off by the switch valve, part of the pipeline medium flows back at the outlet pipeline after a period of time. Under the action of the inertia of the backflow liquid, the waterpower reaches the maximum rapidly, and the phenomenon of impacting a sealing pair of the valve occurs; the light person can not ensure the sealing, and the heavy person can crack the sealing surface or bend the valve rod; the direct rejection of the valve (such as a gate valve, a stop valve, a throttle valve, a butterfly valve and the like) of the single sealing pair is possible; the valve with double sealing pair (such as ball valve, etc.) may maintain sealing, but the service life of the whole valve is greatly influenced.
Therefore, how to solve the problem that the valve in the pipeline with the faster flow velocity (more than or equal to 5m/s) is damaged by the water hammer is provided, and the provision of the valve with safer and more reliable service performance becomes a new problem for improving the valve by a valve manufacturer.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the lifting type waterproof hammer stop valve with the small and medium drift diameters can be used in a pipeline with a high flow speed (more than or equal to 5m/s), and the problems existing in the existing pipeline system can be effectively solved.
This kind of middle and small latus rectum over-and-under type waterproof hammer stop valve includes: the valve comprises a valve body 1, a valve seat 2, a valve clack 3, a valve rod 6, a filler 11, a valve cover assembly 12 and a hand wheel 14, wherein the valve rod 6 penetrates through a central pore passage of the valve cover assembly 12 from top to bottom, and a first intercepting and blocking mechanism which is positioned at the upper part of the valve seat 2 and used for controlling the on-off of an inner cavity of the valve body is formed through the valve clack 3 arranged at the front end part of the valve rod 6 and the valve seat 2 arranged in the inner cavity of the; the method is characterized in that: the lower seat body of the valve seat 2 is additionally provided with a spring control valve A which is abutted against the valve seat 2, and the spring control valve A forms a second channel intercepting and separating mechanism of the inner cavity of the valve body 1.
Furthermore, the spring control valve A consists of a check valve clack 21, a cylindrical spring 22 and a gasket 23, wherein the check valve clack 21 is in a T-shaped structure, the upper plane of the check valve clack is abutted with the bottom of the valve clack 3, and the gasket 23 is arranged between the check valve clack 21 and the valve clack 3; the T-shaped structure has a discharge hole 24 in the column and a cylindrical spring 22 supported by the bottom of the valve body 1 is disposed outside the column.
Further, a drain plug screw 27 is arranged at the bottom of the valve body 1 right below the cylindrical part of the T-shaped structure of the check valve clack 21.
The middle and small drift diameter lifting type waterproof hammer stop valve provided according to the technical scheme has the following characteristics:
1) has a water hammer-proof and main valve flap protection structure; when a valve on a pipeline with higher flow speed (more than or equal to 5m/s) generates water hammer, the stop valve can effectively prevent the main valve flap from being not closed tightly due to the impact of the water hammer on the main valve flap, even the main valve flap sealing surface is damaged and the valve rod is deformed.
2) The online maintenance is convenient; when the valve leaks in the use, the maintenance is needed, the valve is not required to be disassembled from the pipeline, and all parts of the sealing pair can be disassembled.
3) Has a fast-row structure; through a aperture of seting up in the middle of the check valve clack, can discharge the medium between check valve clack and the valve clack for discharge rate, existing quick reset that does benefit to the check valve also can be to playing effective guard action.
4) Arranging a sewage discharge structure; after the valve is used for a period of time, deposits are generated in the valve cavity and need to be removed, otherwise, the flow capacity of the valve is reduced. When the system is maintained, the pressure in the pipeline is released, the blowdown plug screw is unscrewed, the sealing gasket is taken down, the sediment is discharged, and the sealing gasket and the blowdown plug screw are cleaned and screwed down again.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the valve body in an open state;
FIG. 3 is a schematic view of the valve body in a closed state;
FIG. 4 is a schematic diagram of a spring controlled valve;
FIG. 5 is a schematic diagram of the operating principle of the spring control valve;
fig. 6 is a schematic view of the structure and the working principle of the pollution discharging plug.
Names of components in the figures:
1-valve body, 2-valve seat, 3-valve clack, 4-cushion block, 5-valve clack gland, 6-valve rod, 7-middle flange gasket, 8-middle flange nut, 9-middle flange stud, 10-upper sealing seat, 11-packing, 12-valve cover component, 13-hand wheel nut, 14-hand wheel, 15-screw, 16-valve rod nut, 17-gland nut, 18-movable joint bolt, 19-packing gland, 20-packing pressure sleeve, 21-check valve clack, 22-cylindrical spring, 23-washer, 24-discharge hole 25-liquid medium 26-sewage discharge hole 27-sewage discharge plug screw 28-sealing gasket A-spring control valve.
Detailed Description
The invention is further described below and embodiments of the invention are given in conjunction with the drawings of the specification.
The small and medium-diameter lifting type waterproof hammer stop valve as shown in figures 1-6 is an innovative improvement on the commonly used stop valve.
The small and medium-diameter lifting type waterproof hammer stop valve shown in figure 1 comprises: the valve comprises a valve body 1, a valve seat 2, a valve clack 3, a valve rod 6, a filler 11, a valve cover assembly 12 and a hand wheel 14, wherein the valve rod 6 penetrates through a central pore passage of the valve cover assembly 12 from top to bottom, and a first intercepting and blocking mechanism which is positioned at the upper part of the valve seat 2 and used for controlling the on-off of an inner cavity of the valve body is formed through the valve clack 3 arranged at the front end part of the valve rod 6 and the valve seat 2 arranged in the inner cavity of the; the method is characterized in that: the lower seat body of the valve seat 2 is additionally provided with a spring control valve A which is abutted against the valve seat 2, and the spring control valve A forms a second channel intercepting and separating mechanism of the inner cavity of the valve body 1.
As can be seen from fig. 4 and 5: the spring control valve A consists of a check valve clack 21, a cylindrical spring 22 and a gasket 23, wherein the check valve clack 21 is in a T-shaped structure, the upper plane of the check valve clack is abutted with the bottom of the valve clack 3, and the gasket is arranged between the check valve clack 21 and the valve clack 3; the T-shaped structure has a discharge hole 24 in the column part and a cylindrical spring 22 supported by the bottom of the valve body 1 is disposed outside the body.
And a drain plug screw 27 is arranged at the bottom of the valve body right below the T-shaped structure cylinder part of the check valve clack 21.
Figure 6 shows a blow-off plug 27 provided at the bottom of the valve body 1. The blowdown plug screw 27 is arranged close to the bottom of the check valve clack 21, and when the blowdown plug screw 27 is screwed at the bottom of the valve body 1, the upper part of the blowdown plug screw 27 just blocks the discharge hole 24 in the center of the T-shaped check valve clack 21; once the blow-down plug screw 27 is removed, the sediment accumulated in the inner cavity of the valve body can be discharged, and the cleaning effect is achieved.
The working principle of the small and medium drift diameter lifting type waterproof hammer stop valve is as follows:
when it is desired to open the valve (see fig. 2): the hand wheel 14 is rotated anticlockwise, the valve clack 3 arranged at the lower end part of the valve rod 4 also rises synchronously to be separated from the valve seat 2 along with the rising of the valve rod 4, the liquid medium to be conveyed enters the first sealing surface originally formed by the valve clack 3 and the valve seat 2, and along with the rising of the valve rod 6, the fluid passes through the first sealing surface and is pressed down to the second cut-off surface formed by the spring control valve A. Subsequently, the liquid medium under pressure pushes open the check valve flap 21 disposed at the lower part of the valve seat 2 after overcoming the tension of the cylindrical spring 23 in the spring control valve a, so that the entire valve body 1 is in a fully-open state and the liquid medium is in a normal delivery state.
When it is desired to close the valve (see fig. 3): the hand wheel 14 is rotated clockwise, along with the pressing down of the valve rod 4, the valve clack 3 arranged at the lower end part of the valve rod 4 also descends gradually and synchronously and sits on the valve seat 2, the conveying channel of liquid media required to be conveyed at the upstream of a pipeline is cut off, and the first sealing function of the sealing surface formed by the valve clack 3 and the valve seat 2 originally of the valve body 1 is realized.
At the same time (see fig. 3), because of the reduction of the pressure difference formed by the delivery channel as the upper valve flap 3 descends to close the channel, the check valve flap 21 in the spring control valve a located below the valve seat 2 rises gradually under the tension of the cylindrical spring 22 to close; the slow closing of the check valve flap 21 occurs when the check valve flap 21 is about to contact the sealing surface of the valve seat 2, and the discharge opening 24 in the center of the check valve 21 will discharge the liquid medium between the check valve flap 21 and the valve flap 3 until the check valve flap 21 is completely closed, thus achieving a second seal of the valve body 1.
After the check valve 21 is closed for a period of time, the liquid medium flowing back in the pipeline impacts the check valve clack 21, and due to the isolation effect of the check valve clack 21, the impact of the flowing back medium on a main sealing surface formed by the valve clack 3 and the valve seat 2 can be effectively avoided, and the effect of protecting the sealing surface of the valve seat is achieved.
After a period of use of the valve, deposits which may be produced in the interior of the valve body 1 of the valve need to be removed, otherwise the flow capacity of the valve is reduced. When in maintenance, the pressure in the pipeline is required to be removed, the pollution discharge screw plug 27 positioned at the bottom of the valve body 1 is unscrewed, the sealing gasket 28 is taken down, the sediment is removed, and after the sealing gasket 28 and the pollution discharge screw plug 27 are cleaned, the pollution discharge screw plug is screwed down again.
The above is only an example of the present invention given by the applicant according to the technical solution, and any person skilled in the same industry who makes the improvement without creativity with reference to the basic solution should be regarded as belonging to the protection scope of the present invention.
Claims (3)
1. A middle and small drift diameter lifting type waterproof hammer stop valve comprises: the valve comprises a valve body (1), a valve seat (2), a valve clack (3), a valve rod (6), a filler (11), a valve cover assembly (12) and a hand wheel (14), wherein the valve rod (6) penetrates through a central pore passage of the valve cover assembly (12) from top to bottom, and a first intercepting and separating mechanism which is positioned at the upper part of the valve seat (2) and used for controlling the on-off of an inner cavity of the valve body is formed through the valve clack (3) arranged at the front end part of the valve rod (6) and the valve seat (2) arranged in the inner cavity of the valve; the method is characterized in that: and a spring control valve (A) which is abutted against the valve seat (2) is additionally arranged on the lower seat body of the valve seat (2), and the spring control valve (A) forms a second cut-off and cut-off mechanism of the inner cavity of the valve body (1).
2. The medium and small drift diameter lifting type waterproof hammer stop valve according to claim 1, is characterized in that: the spring control valve (A) consists of a check valve clack (21), a cylindrical spring (22) and a gasket (23), wherein the check valve clack (21) is of a T-shaped structure, the upper plane of the check valve clack (21) is abutted against the bottom of the valve clack (3), and the gasket (23) is arranged between the check valve clack and the valve clack; the column body of the T-shaped structure is provided with a discharge hole (24), and a cylindrical spring (22) which takes the bottom of the valve body (1) as a support is arranged outside the column body.
3. The medium and small drift diameter lifting type waterproof hammer stop valve according to claim 2, characterized in that: and a drain plug screw (27) is arranged at the bottom of the valve body right below the T-shaped structure cylinder part of the check valve clack (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921018785.XU CN210164915U (en) | 2019-07-02 | 2019-07-02 | Small and medium drift diameter lifting type water hammer prevention stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921018785.XU CN210164915U (en) | 2019-07-02 | 2019-07-02 | Small and medium drift diameter lifting type water hammer prevention stop valve |
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| Publication Number | Publication Date |
|---|---|
| CN210164915U true CN210164915U (en) | 2020-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921018785.XU Active CN210164915U (en) | 2019-07-02 | 2019-07-02 | Small and medium drift diameter lifting type water hammer prevention stop valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115370760A (en) * | 2022-10-21 | 2022-11-22 | 胜利阀门有限公司 | Bivalve cuts check valve |
-
2019
- 2019-07-02 CN CN201921018785.XU patent/CN210164915U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115370760A (en) * | 2022-10-21 | 2022-11-22 | 胜利阀门有限公司 | Bivalve cuts check valve |
| CN115370760B (en) * | 2022-10-21 | 2022-12-20 | 胜利阀门有限公司 | Bivalve cuts check valve |
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