CN202992285U - Check valve with liner - Google Patents
Check valve with liner Download PDFInfo
- Publication number
- CN202992285U CN202992285U CN201220459037.7U CN201220459037U CN202992285U CN 202992285 U CN202992285 U CN 202992285U CN 201220459037 U CN201220459037 U CN 201220459037U CN 202992285 U CN202992285 U CN 202992285U
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- CN
- China
- Prior art keywords
- valve
- valve body
- safety check
- clack
- liner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model provides a check valve with a liner, and relates to a check valve, in particular to a check device of a pulp conveying pipeline outlet. The check valve is mainly composed of a valve body, a valve clack and a rocking rod, wherein the inner wall of the input end of the valve body and the inner wall of the outlet end of the valve body are respectively provided with an upper protection sleeve and a lower protection sleeve in a lining mode, the upper protection sleeve is of a cone-shaped structure, the valve clack is of a two-layer composite structure, and the rocking rod is fixedly connected with the valve clack. According to the check valve with the liner, on the condition that maintenance can be conducted easily even if the steel part valve body is abraded in penetrated mode, the detachable combination valve clack composed of a polyurethane clack and a thin-wall steel clack is utilized, the requirements of closing precise seal are met, and the purposes of abrasion resistance, corrosion resistance and replacement convenience are achieved. The enough valve cavity inner diameter guarantees the fact that the area of the section of the inner cavity is equal to that of the section of an outlet-inlet port when the valve clack is opened, the flow resistance coefficient is small, pressure stability is guaranteed when pulp flows through the check valve, a flange plate and the valve body at the outlet-inlet port are separated from the pulp by a polyurethane liner protection sleeve, and the flange plate and the valve body are prevented from being abraded. When the protection sleeves need to be replaced when abraded seriously, a check valve flange and a pipeline connection bolt are unscrewed only, the protection sleeves can be replaced easily, the structure is simple, and manufacture is convenient.
Description
Technical field
The utility model relates to a kind of safety check, particularly the check device of ore pulp delivery duct outlet.
Background technique
In the pulp conveying system, cause system's difficulty in starting or sand pump, motor to damage in order to prevent that ducted ore pulp from flowing backwards, need in the sand pump outlet port, safety check to be installed.Yet, many ore dressing plants multiselect is safety check cylinder iron, due to impact and the friction of mortar to valve body, flap, the flap, valve body, flange plate etc. that safety check often occurs in daily production damage or mill logical, cause in use faults frequent, and due to after the safety check flap grinds off, during the conversion of sand pump motor restarting, ore pulp flows backwards and drives the sand pump impeller counter-rotating, cause impeller to come off from main shaft stuck, under the restarting large torque of moment, the pump housing is broken, electric motor end cap is by breakback.And cast iron safety check recoverability is poor, and common repair by welding is difficult to reach usage requirement, must change new product, causes operating cost to increase, and operation brings great impact on the transporting system continuity.
Summary of the invention
The purpose of this utility model is intended to overcome the defective of prior art, and a kind of long service life, the wear-resisting property safety check with liner good, easy to maintenance are provided.
Safety check described in the utility model mainly is made of valve body, flap and rocking bar, and the entry end of valve body and outlet end inwall are lined with respectively upper jacket and lower jacket, and upper jacket is cone structure, and flap is two layer composite structure, and rocking bar is fixedly connected with flap.
Described two-layer flap is that polyurethane lobe and steel lobe bilayer are formed by connecting by the stainless steel countersunk screw, and the polyurethane lobe plays flow backwards sealing and wear-resisting effect, and the steel lobe plays the pressure-bearing effect.The thickness of polyurethane lobe is 1.5 times of steel lobe, the polyurethane lobe be connected with the steel lobe flush or embedded in a kind of connection, use embedded combination type in the high pipeline of pulp concentration, in the low pipeline of concentration with flushing combined type.
There is the upper jacket round platform on the upper jacket top, upper jacket round platform and upper flange interference fit.
Safety check with liner described in the utility model, valve body adopt seamless steel pipe to make, and also can adopt the carbon steel cast inblock.More flexible with the steel pipe manufacturing valve body, according to the needs of pipe-line system, but designed, designed is made.The liner sheath adopts polyurethane material, and the polyurethane material mechanical properties is superior, and hardness, elasticity, other rubber-like of wear resistance are difficult to compare; Ageing resistance, oil resistance are also fairly good.Can be-45 ~ 90 ℃ in temperature, PH uses under 4～12 environmental conditions.Safety check adopts the injection molding type polyurethane material to make liner upper jacket and lower jacket, i.e. the entrance and exit sheath of valve.The upper jacket inner chamber adopts excessive cone structure to reduce the flow resistance to ore pulp, can select different taperings according to different needs; Upper jacket top is reserved with the round platform of certain altitude, round platform and upper flange interference fit, because elastic polyurethane is good, lower jacket is reserved step and the back-up ring interference fit of certain altitude, rocking bar also adopts the cutting of steel lobe to make, it directly is welded on the steel lobe, the length L of rocking bar fully takes into account the gyration center of flap apart from the size of L1, safety check adopts prominent panel type flange plate and valve body welding, weld groove is monolateral V-type, because upper flange coordinates with the upper jacket round platform, except size g was different from lower flange size b, all the other were measure-alike.
Safety check with liner described in the utility model is even if the steel part valve body also can be repaired easily in the situation that mill is logical; The detachable combination brake switch and proporting clack valve lobe that adopts polyurethane lobe and Steel Thin-Wall lobe to consist of namely reaches the tight requirement of closing seam, has reached again wear-resisting, corrosion-resistant, has changed purpose easily; Enough valve pocket internal diameters have guaranteed that the intracavity section area of flap when opening equals the gateway section area, and flow resistance coefficient is little, guarantees the pressure stability of flow of slurry when safety check; Polyurethane liner sheath is separated flange plate, valve body and the ore pulp of safety check ore pulp import and export, avoids flange plate, valve body to be denuded; When the sheath serious wear need be changed, only need safety check flange and pipeline connecting bolt are turned on, can easily change sheath; Simple in structure, easy to make.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model sectional structure schematic diagram.
Fig. 3 is the embedded composite structure schematic diagram of the utility model flap.
Fig. 4 is that the utility model flap flushes the composite structure schematic diagram.
In figure, 1-valve body, 2-flap, 3-rocking bar, 4-upper jacket, 5-lower jacket, 6-flange, 7-bolt.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further, but is not limited to embodiment.
As shown in Fig. 1,2 and 3, a kind of safety check with liner, mainly consisted of by valve body 1, flap 2 and rocking bar 3, valve body 1 is seamless steel pipe or carbon steel, the entry end of valve body 1 and outlet end inwall are lined with respectively upper jacket 4 and lower jacket 5, upper jacket 4 is cone structure, and flap 2 is two layer composite structure, and rocking bar 3 is fixedly connected with flap 2.Two-layer flap 2 is formed by connecting by stainless steel countersunk screw 7 for polyurethane lobe and steel lobe bilayer, the thickness of polyurethane lobe is 1.5 times of steel lobe, the polyurethane lobe be connected with the steel lobe flush or embedded in a kind of connection, there is the upper jacket round platform on upper jacket 4 tops, upper jacket 4 round platforms and upper flange 6 interference fit, safety check adopts prominent panel type flange plate and valve body 1 welding, and weld groove is monolateral V-type.
Claims (7)
1. the safety check with liner, mainly be made of valve body, flap and rocking bar, it is characterized in that, the entry end of valve body and outlet end inwall are lined with respectively upper jacket and lower jacket, upper jacket is cone structure, and flap is two layer composite structure, and rocking bar is fixedly connected with flap.
2. the safety check with liner according to claim 1, is characterized in that, described two-layer flap is that polyurethane lobe and steel lobe bilayer are formed by connecting by the stainless steel countersunk screw.
3. the safety check with liner according to claim 2, is characterized in that, the thickness of polyurethane lobe is 1.5 times of steel plate.
4. the safety check with liner according to claim 1 and 2, is characterized in that, the polyurethane lobe be connected with the steel lobe flush or embedded in a kind of connection.
5. the safety check with liner according to claim 1, is characterized in that, there is the upper jacket round platform on the upper jacket top, upper jacket round platform and upper flange interference fit.
6. the safety check with liner according to claim 1, is characterized in that, valve body is seamless steel pipe or carbon steel.
7. the safety check with liner according to claim 5, is characterized in that, adopts prominent panel type flange plate and valve body welding, and weld groove is monolateral V-type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220459037.7U CN202992285U (en) | 2012-09-11 | 2012-09-11 | Check valve with liner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220459037.7U CN202992285U (en) | 2012-09-11 | 2012-09-11 | Check valve with liner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202992285U true CN202992285U (en) | 2013-06-12 |
Family
ID=48563465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220459037.7U Expired - Lifetime CN202992285U (en) | 2012-09-11 | 2012-09-11 | Check valve with liner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202992285U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427633A (en) * | 2020-10-29 | 2022-05-03 | 中国石油化工股份有限公司 | Device for eliminating negative pressure of non-metal pipe lined with inner lining and mounting method |
-
2012
- 2012-09-11 CN CN201220459037.7U patent/CN202992285U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427633A (en) * | 2020-10-29 | 2022-05-03 | 中国石油化工股份有限公司 | Device for eliminating negative pressure of non-metal pipe lined with inner lining and mounting method |
| CN114427633B (en) * | 2020-10-29 | 2024-03-22 | 中国石油化工股份有限公司 | Device for eliminating negative pressure of non-metal pipe lining and installation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
|
| CX01 | Expiry of patent term |