CN208090004U - A kind of check valve - Google Patents

Abstract

The utility model is related to a kind of valve plate and using the valve plate check valve, valve plate includes matrix skeleton, and described matrix skeleton includes front, side and the back side, and at least described front and side are equipped with the nonmetal-coated layer in integral structure.Check valve includes valve body, valve deck and valve seat, it further include valve plate as described above, axial valve chamber, radial through-hole and the valve body step for positioning the valve seat are equipped in the valve body, the valve deck is mounted on the radial through-hole, and it is connect with the valve body screw thread, the inside of the valve deck is equipped with valve plate support, and the valve plate support is connect by positioning pin with the valve seat, and the valve plate is hinged by valve shaft and the valve plate support.The service life of valve plate is long, without frequently replacing valve plate.Check valve is small, and Operation and Maintenance is convenient, and maintenance costs are low, realizes the open and close of high pressure check valve, improves leakproofness and the safety of check valve, applies in wellsite operation in the arrangement of manifold system, application range is wider.

Description

A kind of check valve

Technical field

The utility model is related to the check valves of a kind of valve plate and the use valve plate, belong to oil field check valve technical field.

Background technology

In current oil, gas well liquid loading operation, high pressure class check valve is mainly used for the device for preventing fluid and medium reflux, Protect the safety of pipe-line system.

At present high pressure check valve primary seal form be on the surface of the sealing surface of valve plate bond one layer of plastics or Rubber material, when fluid media (medium) is flowed from direction, valve plate is overcome gravity that can open by the souring of fluid, is flowing When body medium reverse flow, valve plate and matched valve seat are combined by the effect of high-pressure, realize that product is close Envelope.

However in actual high-voltage operation, due to the difference of test pressure and the complexity of fluid media (medium), fluid media (medium) is to rubber The souring of glue sealing surface causes a part of sand grains that can be embedded in rubber, another part due to surface souring, to rubber Glue generates certain shearing force, and under the effect of high-voltage alternating load, can lead to that tearing occurs in rubber and monoblock type falls off The life of product of situation, the valve plate single layer vulcanization of rubber is very low, and the failure of the stripper rubber can directly cause high pressure check valve to seal It is bad, the normal operation of live pipe-line system is not only influenced, but also hidden danger greatly is brought to the safety of a whole set of manifold system, Increase operating risk.Therefore it during live actual job, in order to preferably meet job requirements, needs frequently to replace valve Plate not only causes the operation activity duration to increase in this way, increases cost, and carry out certain hidden danger to the safety belt of site operation.

Utility model content

The utility model in view of the deficienciess of the prior art, provide a kind of valve plate and the check valve using the valve plate, It is not only simple in structure, job safety, and solve the problems, such as that existing sealing surface of valve plate vulcanized rubber is easy tearing or falls off.

The technical solution that the utility model solves above-mentioned technical problem is as follows：A kind of valve plate, including matrix skeleton, the base Body skeleton includes front, side and the back side, and at least described front and side are equipped with the nonmetal-coated layer in integral structure.

The utility model has the beneficial effects that：The front of matrix skeleton is sealing surface of valve plate.Nonmetal-coated layer is not only Sealing surface of valve plate is bonded, and is at least wrapped up to the side of matrix skeleton；Certainly full clad type valve plate can also be used, together with matrix bone The back side of frame also coats, by bonding matrix skeleton by injection molding or pouring technology with clad, due to valve plate Clad integral coating is in the front and side of matrix skeleton, and when sealing surface of valve plate is washed away by medium, clad is not easy to occur Phenomenon is torn, only vulcanize valve plate in sealing surface of valve plate to solving conventional vulcanized rubbers is washed away and high-pressure gold by medium The problem of category skeleton fails with nonmetallic rubber bound, and rubber tears and falls off replaces valve plate without frequent, extends valve plate Service life.

Based on the above technical solution, the utility model can also do following improvement.

Further, described matrix skeleton is made of metal material；The clad is made of rubber.

Advantageous effect using above-mentioned further scheme is that the integral strength of valve plate is big, and medium when operations involving high pressure is avoided to rush The case where brush valve plate causes valve plate to damage.Clad uses nonmetallic sealing material rubber, not only can anti-corrosion but also with wear-resisting Effect.

The utility model further relates to a kind of check valve, including valve body, valve deck and valve seat, further includes valve plate as described above, Axial valve chamber, radial through-hole and the valve body step for positioning the valve seat are equipped in the valve body, the valve deck is mounted on institute It states on radial through-hole, and is connect with the valve body screw thread, the inside of the valve deck is equipped with valve plate support, and the valve plate support passes through Positioning pin is connect with the valve seat, and the valve plate is hinged by valve shaft and the valve plate support.

The utility model has the beneficial effects that：Valve plate not only plays the role of unlatching, closing and sealing, and valve seat is with valve plate inverse Under being acted on to high-pressure medium, sealing surface of valve plate compression abuts valve seat, forms reliable sealing, and check valve, which is in, at this time closes shape State prevents medium from backflowing；On the contrary, under the effect of positive pressure medium, medium overcomes valve plate gravity, check valve to open.It uses The service life of above-mentioned valve plate, valve plate is long, and valve body is at low cost, avoids the field operation caused by check valve product failure Medium reflux and caused by security risks such as the damages of manifold system.In short, the utility model is small, operation is safeguarded just Victory, repair, cost of upkeep are low, realize the open and close of high pressure check valve, improve leakproofness and the safety of check valve, apply In wellsite operation in the arrangement of manifold system, application range is wider.

Based on the above technical solution, the utility model can also do following improvement.

Further, the acting surface of the valve seat and the valve plate is sealing surface of seat, and the sealing surface of seat is to tilt Face.

Advantageous effect using above-mentioned further scheme is that sealing surface of valve plate and sealing surface of seat fitted seal are realized just To flowing, reversely shut off, and further increase the leakproofness of check valve, prevents dielectric leakage.

Further, the angle of the sealing surface of seat and perpendicular is 10 degree.

Advantageous effect using above-mentioned further scheme is that the simple inclined design in inclined surface is not only convenient for positive medium Circulation, and the effect of medium reflux is prevented in time.

Further, the valve seat is connect with the valve body screw thread.

Advantageous effect using above-mentioned further scheme is to install, is easy to maintain and stable.

Further, it is respectively equipped between the valve seat and the valve body, between the valve deck and the valve plate support close Seal.

Advantageous effect using above-mentioned further scheme is to further increase the leakproofness of valve body.

Further, the both ends of the valve body are connected using union.

Further, the union includes union nut, collar union and circlip, and one end of the union nut is logical It crosses the circlip, nut shoulder, collar union shoulder to connect with the collar union, on the other end of the union nut Equipped with internal thread.

Advantageous effect using above-mentioned further scheme is that the end of valve body is connected using the union of standard, is convenient for and pipe Road connects.

Description of the drawings

Fig. 1 is the structural schematic diagram of the valve plate of the utility model；

Fig. 2 is the structural schematic diagram of the check valve of the utility model；

In figure, 1, valve body；2, valve seat；3, positioning pin；4, valve shaft；5, valve plate；5-1, matrix skeleton；5-2, clad； 5-3, front；5-4, side；5-5, the back side；6, valve plate support；7, valve deck；8, sealing ring；9, circlip；10, collar union； 11, union nut.

Specific implementation mode

The principles of the present invention and feature are described below in conjunction with example, example is served only for explaining this practicality It is novel, it is not intended to limit the scope of the utility model.

As shown in Figure 1, a kind of valve plate 5, including matrix skeleton 5-1, described matrix skeleton include front 5-3, side 5-4 And back side 5-5, at least described front and side are equipped with the nonmetal-coated layer 5-2 in integral structure.

Described matrix skeleton is made of metal material；The clad is made of rubber or plastics.Valve plate it is whole Body intensity is big, and medium when operations involving high pressure is avoided to wash away the case where valve plate causes valve plate to damage.Clad uses nonmetallic sealing material Expect rubber, not only can anti-corrosion and also have wear-resisting effect.

As shown in Fig. 2, the utility model further relates to a kind of check valve, including valve body 1, valve deck 7 and valve seat 2, further include as The upper valve plate 5, the valve body is interior to be equipped with axial valve chamber, radial through-hole and the valve body step for positioning the valve seat, institute Valve deck to be stated on the radial through-hole, and is connect with the valve body screw thread, the inside of the valve deck is equipped with valve plate support 6, The valve plate support is connect by positioning pin 3 with the valve seat, and the valve plate is hinged by valve shaft 4 and the valve plate support.

The acting surface of the valve seat and the valve plate is sealing surface of seat, and the sealing surface of seat is inclined surface.It realizes just To flowing, reversely shut off, and further increase the leakproofness of check valve, prevents dielectric leakage.

The angle of the sealing surface of seat and perpendicular is 10 degree.The simple inclined design in inclined surface is not only convenient for forward direction The circulation of medium, and the effect of medium reflux is prevented in time.

The valve seat is connect with the valve body screw thread.It installs, is easy to maintain and stable.

It is respectively equipped with sealing ring 8 between the valve seat and the valve body, between the valve deck and the valve plate support.Into one Step improves the leakproofness of valve body.

The both ends of the valve body are connected using union.

The union includes union nut 11, collar union 10 and circlip 9, and one end of the union nut passes through institute It states circlip, nut shoulder, collar union shoulder to connect with the collar union, the other end of the union nut is equipped with Internal thread.The end of valve body is connected using the union of standard, is convenient for and piping connection.

The course of work：For valve seat with valve plate under the effect of reverse high-pressure medium, sealing surface of valve plate abuts valve seat, is formed reliable Sealing, check valve is closed at this time, and medium is prevented to backflow；On the contrary, under the effect of positive pressure medium, medium overcomes valve Plate gravity, check valve are opened.

The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model Within the scope of shield.

Claims (8)

1. a kind of check valve, including valve body, valve deck and valve seat, which is characterized in that further include valve plate, the valve plate includes matrix bone Frame, described matrix skeleton include front, side and the back side, and at least described front and side are equipped in the nonmetallic of integral structure Clad；Axial valve chamber, radial through-hole and the valve body step for positioning the valve seat, the valve deck peace are equipped in the valve body It is connect on the radial through-hole, and with the valve body screw thread, the inside of the valve deck is equipped with valve plate support, the valve plate branch Frame is connect by positioning pin with the valve seat, and the valve plate is hinged by valve shaft and the valve plate support.

2. check valve according to claim 1, which is characterized in that described matrix skeleton is made of metal material；It is described Clad is made of plastics or rubber.

3. check valve according to claim 1, which is characterized in that the acting surface of the valve seat and the valve plate is that valve seat is close Cover, the sealing surface of seat are inclined surface.

4. check valve according to claim 3, which is characterized in that the angle of the sealing surface of seat and perpendicular is 10 Degree.

5. check valve according to claim 1, which is characterized in that the valve seat is connect with the valve body screw thread.

6. check valve according to claim 1, which is characterized in that between the valve seat and the valve body, the valve deck with It is respectively equipped with sealing ring between the valve plate support.

7. check valve according to claim 1, which is characterized in that the both ends of the valve body are connected using union.

8. check valve according to claim 7, which is characterized in that the union includes union nut, collar union and bullet Property baffle ring, one end of the union nut passes through the circlip, nut shoulder, collar union shoulder and the collar union The other end of connection, the union nut is equipped with internal thread.