CN2795589Y

CN2795589Y - Check valve for pollution discharge pump

Info

Publication number: CN2795589Y
Application number: CN 200520041982
Authority: CN
Inventors: 陈德利
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd
Priority date: 2005-05-30
Filing date: 2005-05-30
Publication date: 2006-07-12
Anticipated expiration: 2015-05-30

Abstract

The utility model relates to a check valve for dredge pumps, which comprises a valve body, a valve seat assembly, two guide rings and a valve clack assembly, wherein the valve body and the valve seat assembly are connected, and a cavity for fluid communication is formed in the connected valve body and the valve seat assembly; the two guide rings are positioned in the cavity; the valve clack assembly is positioned in the cavity and penetrates through the two guide rings. The utility model is characterized in that the valve seat assembly comprises a valve seat body provided with a shoulder part, a movable rabbet, a gasket positioned between the movable rabbet and the shoulder part, and an o-shaped sealing ring positioned in a movable gap between the movable rabbet and the valve seat body; the valve clack assembly which is positioned in the cavity is composed of an upper and a lower valve clacks, a sealing ring arranged between the upper and the lower valve clacks, a fastener for fixing the upper and the lower valve clacks and the sealing ring, a valve rod which penetrates through the guide rings and the valve clacks, and reset springs positioned among the upper valve clack and the guide rings. The utility model is used in the dredge pumps with sand granules, has the advantages of good sealing performance, low cutting-off noise and long service life.

Description

The pollution discharge pump safety check

Technical field

The utility model relates to the safety check that water pump is used, and particularly relates to the safety check that small-power pump drainage sewage pump is used.

Background technique

The safety check that existing water pump uses is divided into two types of rotary-open type and rise-fall types with the action form of flap.Wherein Swing check valve mainly is to stir to open and close by the flap in the valve body to realize one-directional fluid flow and shutoff.Equally, Lift check valve then is to open and cover the mobile and shutoff that realizes that fluid is unidirectional up and down by lifting flap in the valve body.But, when the Lift check valve level is installed and Swing check valve outlet have a down dip when installing, flap closure and lose check function naturally all can take place, simultaneously, there is the narrow limitation of pipe arrangement setting angle in actual use in above-mentioned two kinds of safety check.

When at present, all there are termination of pumping in rotary-open type that generally adopts and Lift check valve in the impact failure of the shutoff closed pair check valve seal end face of water hammering lower Disc; Handover contains the sand grain medium and seal failure easily takes place causes in the valve body and leak; The big deficiency that waits of the big generation fluid resistance of flap area.Model utility ZL94245136.8 has the easy manufacturing of user simple in structure with safety check more than one kind, but exist contain sand grain sewage use in sealing effect poor, the deficiency that circulating resistance is big.

Summary of the invention

Therefore, the purpose of this utility model is the shortcoming that overcomes prior art, provides a kind of simple in structure, and working service is convenient, and is cheap, easily installs, and seals reliably and be suitable for the non-return valve that band particle sewage shifting pump uses.

To achieve these goals, the utility model provides a kind of pollution discharge pump safety check, comprise that valve body, valve component, described valve body are connected with valve component and form in inside fluid flow cavity, be positioned at two guide rings of cavity, be positioned at this cavity and pass the flap assembly of described two guide rings, it is characterized in that: this valve component comprises the valve seat body with shoulder, movable seam, the packing ring between movable seam and shoulder and is positioned at movable seam and the O-ring seals of the free gap of valve seat body; The flap assembly, it is positioned at cavity, by last lower Disc, be arranged at seal ring between the lower Disc, be used for fixing lower Disc and seal ring fastening piece, pass the valve rod of guide ring and flap, the Returnning spring between last flap and guide ring is formed.

Preferably, the inner chamber of described movable seam is truncated inverted cone shape structure, and the described lower Disc of going up is and the corresponding frusto-conical configuration of movable seam, and the valve rod in the described flap assembly moves radially along guide ring.

Preferable, described safety check is provided with internal and external threads on the valve seat body of inlet, also be provided with internal and external threads on the valve body in outlet port, can be complementary with the silk mouth or the flange of pipe arrangement.

Advantage of the present utility model is: 1) owing to be provided with packing ring in the joint of valve seat body and movable seam, make movable seam have certain buffering and absorption to the water hammer moment impact, thereby improved the working life of safety check; 2) because the setting of taper valve and valve component utilizes medium that characteristics are streamed on the surface of cone seal, prevented that sand grain can guarantee the effective unidirectional blocking-up of fluid in the delay of seal face in the medium, be applicable to the use occasion that contains husky sewage; 3), and be not subjected to the limitation of pipe arrangement setting angle because valve rod formula flap assembly can only move radially along guide ring, and owing to the setting of Returnning spring, this safety check has automatically the characteristics of cutting out, correctly falling after rise simultaneously; 4) because flap just in time enters movable seam in off position and is mated, promptly the flap sectional area is less than movable seam, so the pressure loss of valve is little.

Description of drawings

Fig. 1 is the sectional view of the pollution discharge pump of the utility model one preferred embodiment with safety check;

Embodiment

Below in conjunction with an accompanying drawing and a preferred embodiment safety check of the present utility model is further described.

As shown in Figure 1, the utility model safety check comprises valve body 1, band buffering conical valve seat assembly 2, wherein, this valve component 2 is the movable seam 22 of truncated inverted cone shape, the yielding rubber packing ring 23 between movable seam 22 and shoulder 211 and the O-ring seals 24 that is positioned at the free gap 25 of movable seam 22 and valve seat body 21 by the valve seat body 21 with shoulder 211, inner chamber 221 and forms; Valve body 1 is connected with band buffering conical valve seat assembly 2 and forms internal cavities 3; Rod-type taper valve assembly 4 is positioned at the cavity 3 of valve, its valve rod 41 is interspersed between two guide rings 5 that are arranged on valve cavity 3, being on the same axis with the import and

export

31,32 of valve cavity 3. valve rod 41 is relative radially fixing by two guide rings 5, and can only do axial slip.Rod-type taper valve assembly 4 is made up of flap 44, set screw nut 45 and Returnning spring 46 in valve rod 41, taper lower Disc 42, rubber seal 43, the taper, rubber seal 43 is located in taper lower Disc 42 and the taper between the flap 44, and be sheathed on the valve rod 41 by set screw nut 45 fastening combinations, Returnning spring 46 is arranged between guide ring 5 and the flap 44, be subjected to the active force of spring, the rod-type taper valve assembly 4 that seal ring 43 is housed contacted with the movable seam 22 of band buffering conical valve seat assembly 2 form sealing.

When medium passed through safety check with the arrow A direction, Returnning spring 46 was compressed, and rod-type taper valve assembly 4 upwards slides, and safety check is opening state.When pump stops; be subjected to the active force of water hammer; rod-type taper valve assembly 4 moves down; the movable seam 22 of temporary impact; yielding rubber packing ring 23 pressurizeds move down whole movable seam 22; absorb and reduced impact force; make the check valve seal section be subjected to effective protection; O-ring seals 24 can prevent that fine particle enters the free gap of movable seam 22 and valve seat body 21; under the effect of Returnning spring 46, make taper valve 42 good shape that contacts with the movable seam 22 of valve component 2 become the one-way sealing of good valve.

In the preferred embodiment, safety check is provided with internal thread 212 and outside thread 213 on the valve seat body 21 at import 31 places, also is provided with internal thread 11 and outside thread 12 on the valve body at outlet 32 places, can be complementary with the silk mouth or the flange of pipe arrangement.

Through practice, the utility model safety check is containing during the sand grain sewage pump uses, favorable sealing property, and non-internal leakage, energy-efficient, valve turn-off the low long service life of noise.Avoid general safety check to take out not water outlet of pollution discharge pump because of interior leakage, pump reversing and the water that discharges return faults such as drain again, can guarantee the long-term normal draining of sewage pump.Be applicable to the effluent discharge use occasion in the industries such as environmental protection, metallurgy, chemical industry, aquaculture.

Claims

1. pollution discharge pump safety check, comprise that valve body, valve component, described valve body are connected with valve component and form in inside fluid flow cavity, be positioned at two guide rings of cavity, be positioned at this cavity and pass the flap assembly of described two guide rings, it is characterized in that: this valve component comprises the valve seat body with shoulder, movable seam, the packing ring between movable seam and shoulder and is positioned at movable seam and the O-ring seals of the free gap of valve seat body; The flap assembly, it is positioned at cavity, by last lower Disc, be arranged at seal ring between the lower Disc, be used for fixing lower Disc and seal ring fastening piece, pass the valve rod of guide ring and flap, the Returnning spring between last flap and guide ring is formed.

2. safety check as claimed in claim 1 is characterized in that, the inner chamber of described movable seam is truncated inverted cone shape structure.

3. safety check as claimed in claim 2 is characterized in that, the described lower Disc of going up is and the corresponding frusto-conical configuration of movable seam.

4. safety check as claimed in claim 1 is characterized in that, the valve rod in the described flap assembly moves radially along guide ring.

5. safety check as claimed in claim 1 is characterized in that, described safety check is provided with internal and external threads on the valve seat body of inlet, also is provided with internal and external threads on the valve body in outlet port, can be complementary with the silk mouth or the flange of pipe arrangement.