CN216343934U - A globe check valve with double sealing - Google Patents

Abstract

The utility model discloses a double-sealing cut-off check valve, comprising a valve body, a valve stem, a valve core assembly and a handwheel. The valve body is provided with a valve seat, the valve seat is provided with a valve hole, and the valve body The upper end of the valve core is fixedly provided with a valve cap, the valve core assembly includes a valve core plate, a guide rod, and a sealing gasket, a rebound spring is arranged between the valve core plate and the valve cap, and the outer side wall of the valve core plate is provided with a Y-shaped sealing ring The valve hole is provided with an annular sealing boss corresponding to the sealing gasket, and the sealing gasket is matched with an abutting groove that can accommodate the annular sealing boss, and the inner side wall of the abutting groove is integrally formed with a Y-shaped sealing ring The outer side wall of the valve core plate of the utility model is provided with a Y-shaped sealing ring, which has wear resistance and flexibility. When the water pressure is too high, the gap between the valve core assembly and the valve seat is closed to prevent the cut-off from flowing into the valve core. For its sealing effect, the inner side wall of the abutting groove is integrally formed with a Y-shaped sealing ring, which further ensures the sealing performance of the valve core assembly and improves its service life.

Description

A globe check valve with double sealing

technical field

The utility model relates to the technical field of valves, in particular to a cut-off check valve with double sealing.

Background technique

The valve is used to control the medium in the pipeline. The valve can be divided into gate valve, globe valve, throttle valve, ball valve, butterfly valve, plug valve and check valve according to its structure. A valve that moves linearly up and down to the left of the seat axis. The check valve is a valve whose opening and closing parts automatically prevent the reverse flow of the medium by means of the force of the medium. The stop check valve is a multi-purpose valve that has the functions of a stop valve and a check valve.

The current globe check valves on the market are not tightly sealed, so that the medium flows into the valve core, which affects the work efficiency of the globe check valve, increases its internal damage rate, and shortens its service life. The gasket is in the process of working It is squeezed in the middle of the valve, so that the gasket is easily damaged, causing the gasket to enter the water during the use of the check valve.

SUMMARY OF THE INVENTION

Therefore, the main purpose of the present invention is to solve the above-mentioned problems and provide a cut-off check valve with double sealing properties.

In order to achieve the above purpose, the technical solution adopted by the present utility model is to provide a double-sealing check valve, comprising a valve body with a water inlet and a water outlet, a valve stem, a valve core assembly, and a handwheel, the The valve body is provided with a valve seat, the valve seat is provided with a valve hole connecting the water inlet and the water outlet, the valve hole is arranged perpendicular to the valve body, the upper end of the valve body is fixedly provided with a valve cap, and its valve stem is movably connected to the valve body. The cap can be lifted up and down. The valve core assembly includes a valve core plate, a guide rod, and a sealing pad. The sealing pad is fixed on the lower end of the valve core plate, and a rebound spring is arranged between the valve core plate and the valve cap. The opening degree of the valve can be controlled according to the water pressure. The lower end of the valve rod is provided with a guide hole, and the guide rod is inserted into the guide hole. The outer side wall of the valve core plate is provided with a placement groove, and a Y The Y-shaped sealing ring has wear resistance and flexibility. When the water pressure is too high, it can close the gap between the valve core assembly and the valve seat, prevent the cut-off from flowing into the valve core, and improve its sealing effect. The valve hole is provided with an annular sealing boss corresponding to the sealing gasket, which abuts against the sealing gasket, wherein the sealing gasket is adapted to be provided with an abutment groove on which the annular sealing boss can be placed. When the valve core assembly closes the valve hole, the annular sealing projection The table is fitted and clamped to the inner end of the abutment groove, and the inner side wall of the abutment groove is integrally formed with a Y-shaped sealing ring, which further ensures the sealing performance of the valve core assembly and improves its service life.

In the above-mentioned double-sealing check valve, a convex column is provided at the center of the lower end of the valve core plate, and the outer edge of the lower end of the convex column extends outward to form a convex platform, and the sealing gasket and the convex column are formed. Reinforcing gaskets are arranged between the tables, which can effectively prevent the gasket from detaching and prolong its service life.

In the above-mentioned double sealing check valve, the rebound spring is sleeved on the outside of the valve stem, the lower end surface of the valve cap is provided with a positioning groove, and the upper end of the rebound spring is embedded in the positioning groove. In the groove, the upper end of the valve core plate is correspondingly provided with an annular groove, and the lower end of the rebound spring is arranged in the annular groove, so as to prevent the offset of the rebound spring from affecting the use.

In the above-mentioned double sealing check valve, the side wall of the valve stem is provided with a sealing groove, and a rubber ring is fitted in the sealing groove, and the rubber ring is against the inner side wall of the valve cap, Further improve the sealing performance of the stop check valve.

In the above-mentioned double sealing check valve, the cross section of the annular sealing boss is a trapezoid, which can strengthen the clamping force between the annular sealing boss and the sealing gasket and improve the sealing performance.

In the above-mentioned double sealing check valve, the material of the rebound spring is SUS304 stainless steel spring.

In the above-mentioned double sealing check valve, the outside of the valve body is provided with a water flow marking direction arrow, which is convenient for installation and use.

The beneficial effects of the present utility model are:

Compared with the prior art, the outer side wall of the valve core plate of the present invention is provided with a Y-shaped sealing ring, which has wear resistance and flexibility, and can close the gap between the valve core assembly and the valve seat when the water pressure is too high, preventing Stop the flow into the valve core to improve its sealing effect. The sealing gasket is matched with an abutment groove that can be placed with an annular sealing boss. The inner side wall of the abutment groove is integrally formed with a Y-shaped sealing ring, which further ensures the sealing of the valve core assembly. properties and increase its service life.

A reinforcing gasket is arranged between the sealing gasket and the boss of the utility model, which can effectively prevent the separation of the sealing gasket and prolong its service life; the lower end surface of the valve cap is provided with a positioning groove, and the upper end of the valve core plate is correspondingly provided with an annular recess The upper and lower ends of the rebound spring are embedded in the positioning groove and the annular groove respectively, so as to prevent the offset of the rebound spring from affecting the use.

Description of drawings

Figure 1 is a cross-sectional view of the present invention.

Figure 2 is a partial cross-sectional view of the present invention.

3 is a cross-sectional view of the valve core assembly of the present invention.

Figure 4 is a front view of the present invention.

Detailed ways

Below in conjunction with the accompanying drawings and specific embodiments, the present utility model is described in further detail:

Referring to FIGS. 1 to 4 , the present invention provides a double-sealing check valve, comprising a valve body 1 with a water inlet 11 and a water outlet 12 , a valve stem 2 , a valve core assembly 3 , and a handwheel 4 , the valve body 1 is provided with a valve seat 5, the valve seat 5 is provided with a valve hole 51 connecting the water inlet 11 and the water outlet 12, the valve hole 51 is arranged perpendicular to the valve body 1, and the upper end of the valve body 1 A valve cap 6 is fixedly arranged, and the valve stem 2 is movably connected to the valve cap 6 and can be lifted up and down. The valve core assembly 3 of the present invention includes a valve core plate 31, a guide rod 32, and a sealing gasket 33. The sealing gasket 33 is fixed It is arranged at the lower end of the valve core plate 31, and there is a rebound spring 7 between the valve core plate 31 and the valve cap 6, which can control the opening of the valve according to the water pressure. When the pressure of the pipeline is greater than 0.05MPa, the valve core The component 3 is displaced upwards. As the pressure rises, the opening of the valve core component 3 continues to increase until it is fully open. When the pressure decreases, the opening height of the valve core component 3 gradually decreases until it is less than 0.05MPa. The valve is closed, the lower end of the valve rod 2 has a guide hole 21, the guide rod 32 is inserted into the guide hole 21, the outer side wall of the valve core plate 31 is provided with a placement groove 34, and the placement groove 34 is provided with a Y-shaped The sealing ring 341, the Y-shaped sealing ring 341 has wear resistance and flexibility, can close the gap between the valve core assembly 3 and the valve seat 5 when the water pressure is too high, prevent the cut-off from flowing into the valve core, and improve its sealing effect , the valve hole 51 is provided with an annular sealing boss 52 corresponding to the sealing pad 33 to abut against the sealing pad 33, wherein the sealing pad 33 is adapted to be provided with an abutment groove 331 on which the annular sealing boss 52 can be placed. When the assembly 3 closes the valve hole 51 , its annular sealing boss 52 fits into the inner end of the abutment groove 331 . tightness and increase its service life.

The center of the lower end of the valve core plate 31 of the present invention is provided with a protruding post 35 , the outer edge of the lower end of the protruding post 35 extends outward to form a boss 36 , and a reinforcing gasket is arranged between the sealing gasket 33 and the boss 36 37. Effectively prevent the detachment of the sealing gasket 33 and prolong its service life. The cross section of the annular sealing boss 52 is a trapezoid, which can strengthen the clamping force between the annular sealing boss 52 and the sealing gasket 33 and improve the sealing performance; the valve stem 2. The side wall is provided with a sealing groove 22, and a rubber ring 8 is fitted in the sealing groove 22, and the rubber ring 8 abuts against the inner side wall of the valve cap 6 to further improve the sealing performance of the cut-off check valve.

The rebound spring 7 is sleeved on the outside of the valve stem 2 , the lower end surface of the valve cap 6 is provided with a positioning groove 61 , the upper end of the rebound spring 7 is embedded in the positioning groove 61 , and the upper end of the valve core plate 31 Correspondingly, an annular groove 38 is provided, and the lower end of the rebound spring 7 is placed in the annular groove 38 to prevent the rebound spring 7 from being offset and affecting the use. The material of the rebound spring 7 is SUS304 stainless steel spring; the valve body 1 The outside is provided with a water flow marking direction arrow 9 for easy installation and use.

The multifunctional touch probe device provided by the embodiments of the present invention has been described in detail above. The principles and implementations of the present invention are described with specific examples in this paper. The descriptions of the above embodiments are only used to help understand the present invention. At the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this description should not be understood. This is the limitation of the present invention.

Claims (7)

1. A globe check valve with double sealing properties, comprising a valve body with a water inlet and a water outlet, a valve stem, a valve core assembly, and a handwheel, the valve body is provided with a valve seat, and the valve seat is provided with a communication port; The valve holes of the water inlet and the water outlet are arranged perpendicular to the valve body, the upper end of the valve body is fixedly provided with a bonnet, and the valve stem is movably connected to the bonnet and can be lifted up and down, characterized in that: the The valve core assembly includes a valve core plate, a guide rod, and a sealing gasket. The sealing gasket is fixedly arranged on the lower end of the valve core plate, and a rebound spring is arranged between the valve core plate and the valve cap, and the lower end of the valve rod starts to have a guide. The guide rod is inserted into the guide hole, the outer side wall of the valve core plate is provided with a placement groove, the placement groove is provided with a Y-shaped sealing ring, and the valve hole is provided with an annular sealing boss and a sealing gasket corresponding to the sealing gasket. Abutting against each other, wherein the sealing gasket is adapted to be provided with an abutting groove on which an annular sealing boss can be placed, and a Y-shaped sealing ring is integrally formed on the inner side wall of the abutting groove. 2 . The double-sealing check valve according to claim 1 , wherein the center of the lower end of the valve core plate is provided with a convex column, and the outer edge of the lower end of the convex column extends outward to form a convex column. 3 . A boss, a reinforcing gasket is arranged between the sealing gasket and the boss. 3 . The double-sealing check valve according to claim 1 , wherein the rebound spring is sleeved on the outside of the valve stem, and the lower end surface of the valve cap is provided with a positioning groove, 3 . The upper end of the rebound spring is embedded in the positioning groove, the upper end of the valve core plate is correspondingly provided with an annular groove, and the lower end of the rebound spring is arranged in the annular groove. 4. A double-sealing check valve according to any one of claims 1-3, characterized in that: the side wall of the valve stem is provided with a sealing groove, and a rubber is arranged in the sealing groove. The rubber ring is against the inner side wall of the valve cap. 5 . The double sealing check valve according to claim 1 , wherein the cross section of the annular sealing boss is a trapezoid. 6 . 6 . The double-sealing check valve according to claim 1 , wherein the rebound spring is made of SUS304 stainless steel spring. 7 . 7. The double-sealing check valve according to any one of claims 1-3, characterized in that: the outside of the valve body is provided with a water flow marking direction arrow.

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