CN201428837Y

CN201428837Y - Check valve

Info

Publication number: CN201428837Y
Application number: CN2009200210339U
Authority: CN
Inventors: 杜华
Original assignee: GAOMI HAINA SANITARY PRODUCTS CO Ltd
Current assignee: GAOMI HAINA SANITARY PRODUCTS CO Ltd
Priority date: 2009-04-17
Filing date: 2009-04-17
Publication date: 2010-03-24
Anticipated expiration: 2019-04-17

Abstract

The utility model relates to a check valve, which comprises a valve body. A flow passage is arranged on the valve body. A check device is arranged in the flow passage and comprises a guide sleeve. A sealed nozzle is arranged at the lower end of the guide sleeve. A sliding block matched with the sealed nozzle is arranged in the guide sleeve. The sliding block is fixedly connected with a sealing block. Since the closing and the opening between the sealing block and the sealed nozzle are realized through the differential pressure between a fluid inlet and a fluid outlet and the gravity of the sliding block and the sealing block, a compression spring is saved, the opening force of the check valve is reduced, the opening sensitivity is improved, the problem that the sealing block is aged rapidly under the action of the force of the spring is avoided and the service life of the sealing block is improved. Moreover, since the sealing type between the sealing block and the sealed nozzle is thelinear sealing when the sealing block and the sealed nozzle are closed, the problem that the tightness is affected because the fluid contains particle impurities is avoided and the sealing reliabilityis improved.

Description

A kind of safety check

Technical field

The utility model relates to a kind of valve, conducting when relating to a kind of flowing medium postive direction in pipeline specifically and flowing, the safety check that flowing medium ends when flowing in the other direction.

Background technique

Safety check is the valve that can stop fluid to flow backwards automatically, when suction side pressure is higher than outlet side pressure, the flap of safety check is opened under fluid pressure action, fluid flows to outlet side from suction side, when suction side pressure was lower than outlet side pressure, flap was closed under the effect of fluid pressure difference, gravity own or spring force automatically in case the fluid stopping body flows backwards.

Present employed safety check generally comprises spring type safety check and no spring type safety check, the flap of spring type safety check is connected with spring, under the effect of spring force and fluid pressure difference, be in closed condition, when the inlet pressure of safety check during greater than spring force and outlet pressure sum, the safety check conducting, fluid flows to outlet side from the suction side of safety check, the flap of safety check is made by rubber material mostly, the rubber flap is easy to generate aging for a long time under the effect of spring force, shortened the working life of rubber flap, because flap is connected with spring, the opening force of safety check is increased, open sensitivity and reduce; The flap of no spring type safety check is in closed condition under the effect of fluid pressure difference and flap self gravitation, when the inlet pressure of safety check during greater than flap self gravitation and outlet pressure sum, the safety check conducting, fluid flows to outlet side from the suction side of safety check, no spring type safety check is in off position the time, adopt face seal mostly, when sealing surface enters particulate contamination, easily cause poorly sealed problem, thereby safety check was lost efficacy.

The model utility content

Problem to be solved in the utility model is at above problem, provides a kind of safety check to open highly sensitive, caulking gum long service life, safety check that sealing reliability is high.

For addressing the above problem, the technological scheme that the utility model adopted is: a kind of safety check, comprise valve body, described valve body is provided with runner, be provided with check device in the described runner, described check device comprises guide sleeve, and described guide sleeve lower end is provided with sealed mouth, is provided with the slide block that matches with sealed mouth in the described guide sleeve.

A kind of concrete optimized project, described sealed mouth are provided with the projection of annular near a side of slide block.

A kind of concrete optimized project, described slide block is fixedly connected with sealing block near a side of sealed mouth.

A kind of concrete optimized project, linear sealing between described sealing block and the sealed mouth.

A kind of concrete optimized project, described guide sleeve inwall is provided with several guide vanes, and each guide vane top correspondence is provided with spacing blade.

A kind of concrete optimized project, described valve body upper end is provided with outside thread, and described valve body lower end is provided with internal thread.

A kind of concrete optimized project, the lower end screw thread of described valve body is connected with fastening ring, and fastening ring is fixed on sealed mouth in the valve body.

A kind of concrete optimized project, described fastening ring excircle is provided with screw thread, and described fastening ring is provided with interior hexagonal through hole, by interior hexagonal through hole fastening ring is screwed in the valve body.

A kind of concrete optimized project, described fastening ring upper end is provided with the o RunddichtringO, realizes the sealing of outflow end fluid by the o RunddichtringO.

A kind of concrete optimized project, described fastening ring lower end is provided with the filter screen rubber cushion, by the filter screen rubber cushion contaminant filter in the fluid is fallen.

The utility model is taked above technological scheme, have the following advantages: the screw thread by the valve body top and bottom vertically inserts valve body in the fluid line, during feed flow, the pressure of fluid inlet end increases, when the pressure of fluid inlet end during greater than the gravity sum of the pressure of fluid outlet and slide block and sealing block, slide block and sealing block will upwards slide, sealing block and sealed mouth are separately, fluid enters in the guide sleeve through the through hole on the sealed mouth, because the diameter of slide block is less than the internal diameter of guide sleeve, fluid will flow through from the slit between guide sleeve and the slide block, flow out through the outlet end of through hole from valve body then; When stopping feed flow, the fluid inlet end pressure reduces, under the action of gravity of the pressure of fluid outlet fluid and slide block and sealing block, slide block and sealing block will be to lower slider, be pressed on the annular protrusion of sealed mouth at the pressure of outlet end fluid and the action of gravity lower seal piece of slide block and sealing block, linear sealing between sealing block and the sealed mouth, make the fluid can not reverse flow, thereby realized the purpose that fluid can only one-way flow, because the closed and unlatching between sealing block and the sealed mouth is to realize by the gravity of the pressure reduction between fluid inlet and the outlet and slide block and sealing block, saved pressure spring, the opening force of safety check is reduced, unlatching sensitivity improves, and has avoided sealing block aging too fast problem under the spring force effect, the working life of having improved sealing block, again because when sealing block and sealed mouth closure, be linear sealing between sealing block and the sealed mouth, avoided influencing the problem of sealing, improved the reliability of sealing because of containing particulate contamination in the fluid.

The utility model is described in further detail below in conjunction with drawings and Examples.

Description of drawings

Accompanying drawing 1 is the structural representation of safety check among the utility model embodiment;

Accompanying drawing 2 is the structural representation of guide sleeve among the utility model embodiment;

Accompanying drawing 3 is that the A-A of accompanying drawing 2 is to sectional view.

Among the figure: the 1-valve body; The 2-guide sleeve; The 21-guide vane; The spacing blade of 22-; The 23-through hole; The 3-slide block; The 4-sealing block; The 5-sealed mouth; The 51-projection; The 6-o RunddichtringO; The 7-fastening ring; Hexagonal through hole in the 71-; 8-filter screen rubber cushion.

Embodiment

Embodiment: as shown in Figure 1, a kind of safety check, comprise valve body 1, valve body 1 upper end is provided with outside thread, valve body 1 lower end is provided with internal thread, valve body 1 is provided with runner, be provided with check device in the runner, valve body 1 lower end is the fluid inlet end, and valve body 1 upper end is a fluid outlet, and check device comprises guide sleeve 2, sealed mouth 5 and slide block 3, guide sleeve 2 lower ends are provided with sealed mouth 5, be provided with the slide block 3 that matches with sealed mouth 5 in the guide sleeve 2, guide sleeve 2 upper ends are provided with through hole 23, and slide block 3 is fixedly connected with sealing block 4 near a side of sealed mouth 5, slide block 3 can axially reciprocatingly sliding along guide sleeve 2, sealed mouth 5 is provided with through hole, and sealed mouth 5 is provided with annular protrusion 51, and the lower end screw thread of valve body 1 is connected with fastening ring 7, be provided with o RunddichtringO 6 between fastening ring 7 and the sealed mouth 5, fastening ring 7 lower ends are provided with filter screen rubber cushion 8, and fastening ring 7 excircles are provided with screw thread, and fastening ring 7 is provided with interior hexagonal through hole 71.

When safety check was in closed condition, sealing block 4 and sealed mouth 5 pressed together, because sealed mouth 5 is provided with the projection 51 of annular, so, realized the linear sealing between sealing block 4 and the sealed mouth 5.

Shown in accompanying drawing 2, accompanying drawing 3, guide sleeve 2 inwalls are provided with six guide vanes 21, each guide vane 21 top correspondence is provided with spacing blade 22, six guide vanes 21 are uniform along the inner circumference of guide sleeve 2, six spacing blades 22 are uniform along the inner circumference of guide sleeve 2, the position that spacing blade 22 restriction slide blocks 3 upwards slide, anti-limited slip block 3 stops up the through hole on the guide sleeve 2 23.

In use, screw thread by valve body 1 top and bottom vertically inserts valve body 1 in the fluid line, during feed flow, the pressure of fluid inlet end increases, when the pressure of fluid inlet end greater than the pressure of fluid outlet and slide block 3 gravity sum with sealing block 4, slide block 3 and sealing block 4 will upwards slide, sealing block 4 and sealed mouth 5 are separately, fluid enters in the guide sleeve 2 through the through hole on the sealed mouth 5, because the diameter of slide block 3 is less than the internal diameter of guide sleeve 2, fluid will flow through from the slit between guide sleeve 2 and the slide block 3, flow out through the outlet end of through hole 23 from valve body 1 then; When stopping feed flow, the fluid inlet end pressure reduces, under the action of gravity of the pressure of fluid outlet fluid and slide block 3 and sealing block 4, slide block 3 and sealing block 4 will be to lower slider, be pressed on the annular protrusion 51 of sealed mouth 5 at the pressure of outlet end fluid and the action of gravity lower seal piece 4 of slide block 3 and sealing block 4, linear sealing between sealing block 4 and the sealed mouth 5, make the fluid can not reverse flow, owing to be linear sealing between sealing block 4 and the sealed mouth 5, so, avoided influencing the problem of sealing, improved the reliability of sealing because of containing particulate contamination in the fluid.

Claims

1, a kind of safety check, comprise valve body (1), described valve body (1) is provided with runner, be provided with check device in the described runner, it is characterized in that: described check device comprises guide sleeve (2), described guide sleeve (2) lower end is provided with sealed mouth (5), is provided with the slide block (3) that matches with sealed mouth (5) in the described guide sleeve (2).

2, a kind of safety check as claimed in claim 1 is characterized in that: described sealed mouth (5) is provided with the projection (51) of annular near a side of slide block (3).

3, a kind of safety check as claimed in claim 1 is characterized in that: described slide block (3) is fixedly connected with sealing block (4) near a side of sealed mouth (5).

4, a kind of safety check as claimed in claim 3 is characterized in that: linear sealing between described sealing block (4) and the sealed mouth (5).

5, a kind of safety check as claimed in claim 1 is characterized in that: described guide sleeve (2) inwall is provided with several guide vanes (21), and each guide vane (21) top correspondence is provided with spacing blade (22).

6, a kind of safety check as claimed in claim 1 is characterized in that: described valve body (1) upper end is provided with outside thread, and described valve body (1) lower end is provided with internal thread.

7, a kind of safety check as claimed in claim 1 is characterized in that: the lower end screw thread of described valve body (1) is connected with fastening ring (7).

8, a kind of safety check as claimed in claim 7 is characterized in that: described fastening ring (7) excircle is provided with screw thread, and described fastening ring (7) is provided with interior hexagonal through hole (71).

9, a kind of safety check as claimed in claim 7 is characterized in that: described fastening ring (7) upper end is provided with o RunddichtringO (6).

10, a kind of safety check as claimed in claim 7 is characterized in that: described fastening ring (7) lower end is provided with filter screen rubber cushion (8).