CN218625532U

CN218625532U - Stop check valve

Info

Publication number: CN218625532U
Application number: CN202223091539.1U
Authority: CN
Inventors: 蔡淄博
Original assignee: Shanghai Qiwei Valve Co ltd
Current assignee: Shanghai Qiwei Valve Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-03-14
Anticipated expiration: 2032-11-21

Abstract

The utility model discloses a stop check valve relates to stop check valve technical field, including actuating mechanism, valve gap and the valve body that is connected, valve body upper portion is equipped with and is used for holding the recess of valve gap, be equipped with the valve rod in the valve gap, the tip of valve rod is stop valve core, sliding connection has the sleeve on the valve rod, be equipped with the gliding elastic element of cooperation on the sleeve, telescopic lower part rigid coupling has the non return case, the inner wall of recess is equipped with a plurality of steps, the step with stop valve core and the sealed cooperation of non return case. The utility model discloses can increase of service life, can also better sealing performance after using a period.

Description

Stop check valve

Technical Field

The utility model relates to a by check valve technical field, concretely relates to by check valve.

Background

The stop check valve is a multi-purpose valve with the functions of both stop valve and check valve, and its structure form is similar to that of stop valve, but its valve rod and valve flap are not fixedly connected. When the valve rod descends to press the valve clack on the valve seat, the valve rod plays a role of a stop valve; the valve rod acts as a check valve when lifted. The product standard CB590-1995 design of the stop check valve has a space which can be optimized, the existing standard product adopts a valve rod and a valve to move up and down simultaneously, the leakage cannot be stopped after the stop valve or the check valve is used for a period of time, the service life is short, and the sealing performance can be greatly weakened after the stop valve or the check valve is used for a long time.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

To current stop check valve use behind a period stop valve function or check valve function can not close leak, the short technical problem of life-span, the utility model provides a stop check valve, it can increase of service life, can also better sealing performance after using a period.

2. Technical scheme

In order to solve the above problem, the utility model provides a technical scheme does:

the stop check valve comprises an actuating mechanism, a valve cover and a valve body which are connected, wherein a groove used for containing the valve cover is formed in the upper portion of the valve body, a valve rod is arranged in the valve cover, a stop valve core is arranged at the end portion of the valve rod, a sleeve is connected onto the valve rod in a sliding mode, an elastic element matched with the sleeve in a sliding mode is arranged on the sleeve, a check valve core is fixedly connected to the lower portion of the sleeve, a plurality of steps are arranged on the inner wall of the groove, and the steps are in sealing fit with the stop valve core and the check valve core.

Optionally, the step is provided with an inclined surface, the lower edge of the non-return valve core is provided with a non-return sealing surface matched with the inclined surface, and the non-return sealing surface is parallel to the inclined surface.

Optionally, a stop sealing surface matched with the stop valve core is arranged at the lower part of the groove.

Optionally, the stop sealing surface is a ring surface, and the width of the stop sealing surface is smaller than the width of the side surface of the stop valve core.

Optionally, an inner wall of an upper portion of the recess is threadedly engaged with the valve cap.

Optionally, a stopper abutting against the elastic element is arranged inside the valve cover.

Optionally, the side of the check valve cartridge is provided with a sealing element and a groove for receiving the sealing element.

Optionally, a through hole in sliding fit with the valve rod is arranged in the middle of the sleeve and the check valve core.

Optionally, the space of the groove is connected with a discharge pipeline and a feed pipeline, and the outer parts of the discharge pipeline and the feed pipeline, which exceed the valve body, are provided with threads for connection.

Optionally, the valve body is of an integrally formed structure.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

the utility model provides a technical scheme has set up the structure of slidable double-valve-element, double containment face, by with the non return function through by case and non return case separation, by adopting the tapering inclined plane sealed with the non return case, avoids the integration by case and non return case structure to eliminate the sealing performance that machining error and wearing and tearing lead to impaired, and prolong the life of valve.

Drawings

Fig. 1 is a schematic structural view of a stop check valve according to an embodiment of the present invention.

1. An actuator; 2. a valve cover; 3. a valve body; 4. a sleeve; 5. an elastic element; 6. a check valve core; 7. a valve stem; 8. a cut-off valve core; 9. a sealing element; 10. a stopper; 11. a discharge pipe; 12. a feed conduit; 13. a cut-off sealing surface; 14. and (4) a non-return sealing surface.

Detailed Description

For a further understanding of the present invention, reference will be made to the drawings and examples for a detailed description of the invention.

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The utility model discloses in words such as first, second, be for the description the utility model discloses a technical scheme is convenient and set up, and does not have specific limiting action, is general finger, right the technical scheme of the utility model does not constitute limiting action. It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. A plurality of technical schemes in the same embodiment and a plurality of technical schemes in different embodiments can be arranged and combined to form a new technical scheme without contradiction or conflict, which is all in the scope of the utility model.

Examples

With reference to fig. 1, the stop check valve comprises an actuating mechanism 1, a valve cover 2 and a valve body 3 which are connected, wherein a groove for accommodating the valve cover 2 is formed in the upper portion of the valve body 3, a valve rod 7 is arranged in the valve cover 2, a stop valve core 8 is arranged at the end portion of the valve rod 7, a sleeve 4 is connected onto the valve rod 7 in a sliding mode, an elastic element 5 which is matched with the sleeve to slide is arranged on the sleeve 4, a check valve core 6 is fixedly connected to the lower portion of the sleeve 4, a plurality of steps are arranged on the inner wall of the groove, and the steps are in sealing fit with the stop valve core 8 and the check valve core 6. The valve core with the stopping and non-return functions is separated and is divided into a stopping valve core 8 and a non-return valve core 6, the stopping function is that the whole valve rod 7 is perpendicular to the bottom of the groove of the valve seat, the non-return valve core 6 is designed to independently move up and down through the non-return function, an elastic element 5 is arranged above the non-return valve core 6, the non-return valve core 6 provides downward pressing elasticity, sealing is guaranteed, and the non-return function is achieved. The groove of the valve rod 7 and the up-down movement check valve core 6 are sealed by a sealing ring, namely an O-shaped ring. The actuating mechanism 1 comprises a hand wheel which is connected with the valve rod 7 and can control the valve rod 7 to move up and down by utilizing the rotation of threads.

The step is provided with an inclined plane, the lower edge of the check valve core 6 is provided with a check sealing surface 14 matched with the inclined plane, and the check sealing surface 14 is parallel to the inclined plane. The stop valve core 8 and the check valve core 6 are sealed by adopting the bevel taper, so that the service life is prolonged.

The lower part of the groove is provided with a stop sealing surface 13 matched with the stop valve core 8. The stop sealing surface 13 is a ring surface, the width of the stop sealing surface 13 is smaller than that of the side surface of the stop valve core 8, the width (area) of the stop sealing surface 13 is small, the sealing pressure is large, and the sealing performance is better.

The inner wall of the upper portion of the groove is in threaded fit with the valve cover 2, and installation is convenient. A stop block 10 which is abutted against the elastic element 5 is arranged inside the valve cover 2 and is used for matching with the elastic element 5 to provide elastic force for the check valve core 6. The side of the non-return valve cartridge 6 is provided with a sealing element 9 and a groove for receiving the sealing element 9, i.e. an O-ring. And through holes in sliding fit with the valve rod 7 are formed in the middle parts of the sleeve 4 and the check valve core 6. The spatial connection of recess has ejection of compact pipeline 11 and charge-in pipeline 12, the outside that surpasss 3 positions of valve body of ejection of compact pipeline 11 and charge-in pipeline 12 is equipped with the screw thread that is used for connecting, conveniently connects external pipeline. The valve body 3 is of an integrally formed structure, so that the structural strength of the valve is improved, and the service life is prolonged.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. The stop check valve is characterized by comprising an actuating mechanism, a valve cover and a valve body which are connected, wherein a groove for accommodating the valve cover is formed in the upper portion of the valve body, a valve rod is arranged in the valve cover, a stop valve core is arranged at the end portion of the valve rod, a sleeve is connected onto the valve rod in a sliding mode, an elastic element which is matched with the valve cover in a sliding mode is arranged on the sleeve, a check valve core is fixedly connected to the lower portion of the sleeve, a plurality of steps are arranged on the inner wall of the groove, and the steps are in sealing fit with the stop valve core and the check valve core.

2. A stop check valve as claimed in claim 1, wherein said step is provided with a ramp and the lower edge of said check valve spool is provided with a check sealing surface engaging the ramp, said check sealing surface being parallel to said ramp.

3. The check valve according to claim 1, wherein a lower portion of the groove is provided with a check sealing surface to be engaged with the check valve body.

4. The check valve of claim 3, wherein the check seal surface is an annular surface, and a width of the check seal surface is smaller than a width of a side surface of the check valve body.

5. A stop check valve as defined in claim 1 wherein the inner wall of the upper portion of said recess is threadably engaged with said valve cover.

6. A stop-check valve as claimed in claim 1, wherein a stop is provided on the interior of the valve cover for abutment with the resilient member.

7. A stop check valve as claimed in claim 1, wherein the side of the check valve cartridge is provided with a sealing element and a groove for receiving the sealing element.

8. The check valve of claim 1, wherein the sleeve and the middle portion of the check valve cartridge are provided with through holes that are slidably engaged with the valve stem.

9. The stop check valve of claim 1, wherein the space of the groove is connected with a discharge pipeline and a feed pipeline, and the outer part of the discharge pipeline and the feed pipeline, which is beyond the valve body, is provided with a thread for connection.

10. A stop check valve as claimed in any one of claims 1 to 9, wherein the valve body is of unitary construction.