CN2572164Y - Universal time-delay wearing-resistant automatic cutting off valve core - Google Patents

Abstract

A general time-delay wear-resistant self-closing spool, mainly including spool sleeve, floating spool, valve stem, button, delay hole, spring and sealing ring, etc., which move with the floating spool assembly in the spool sleeve The radii of the cylindrical surfaces in the relevant sections decrease successively in the direction of the reset of the floating valve core assembly (that is, close the self-closing valve), and the valve stem is an integral valve stem. This utility model can reduce the wear of the floating valve core assembly and prolong the service life. Long life and high productivity. The utility model is suitable for sanitary ware used in families and public places.

Description

Universal time-delay wear-resistant self-closing spool

Technical field

The utility model relates to a time-delay self-closing valve core, in particular to a universal time-delay self-closing valve core used on sanitary ware.

Background technique

The existing time-delay self-closing spool includes several parts such as spool cover, spool cover end cover, floating spool, spool cover, valve stem, valve stem cover, button, spring and sealing ring, floating spool, spool Cover, valve stem, valve stem cover, button, spring and sealing ring form the floating spool assembly, and the delay reset chamber is the space surrounded by the spool sleeve, spool sleeve end cover and floating spool assembly; the self-closing spool works , the floating spool assembly moves along several inner cylindrical surfaces in the spool sleeve; the coaxiality between these inner cylindrical surfaces and the perpendicularity between them and the sealing end face directly affect the normal operation of the floating spool assembly and service life, due to the structural limitation of the existing self-closing valve core, the inner cylindrical surface and the sealing end surface of the valve core sleeve need to be installed and processed in multiple times, and the valve stem is composed of two parts connected by threads. Therefore, in the process of processing and assembling, the coaxiality and verticality cannot be guaranteed, resulting in that the floating spool assembly often suffers unilateral wear during use, requiring frequent maintenance or replacement.

Contents of the invention

The purpose of the utility model is to provide a new structure of the self-closing valve core, so that it is easy to ensure coaxiality and verticality during installation and processing, reduce wear and prolong service life.

The technical scheme adopted by the utility model to solve its technical problems is: 1) improve the design of several sections of inner cylindrical surfaces in the valve core sleeve related to the movement of the floating valve core assembly, so that the radius of the inner cylindrical surfaces of these sections is within the range of the floating valve core. The reset direction of the core assembly (that is, closing the self-closing valve) decreases successively, so that the design can make the inner cylindrical surface in the valve core sleeve and the sealing end surface be processed in one clamping with a combination tool. 2) The integral valve stem is used to reduce assembly errors. The above two points can greatly improve the coaxiality and verticality of the utility model in the process of processing and assembly, improve productivity and reduce costs.

The beneficial effect of the utility model is that the coaxiality and verticality are easy to ensure, the wear of the floating valve core assembly can be reduced, the service life is prolonged, the structure is simple, the productivity is high, the cost is low, and the maintenance is convenient.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Fig. 1 is a longitudinal sectional view of an embodiment of the present utility model.

Fig. 2 is a longitudinal sectional view of an application example of the present utility model.

In the figure, 1. Inner cylindrical surface A, 2. Valve core sleeve, 3. Floating valve core, 4. Water inlet, 5. Inner cylindrical surface B, 6. Valve stem, 7. Button, 8. Valve stem return spring, 9. Inner cylindrical surface C, 10. Water outlet, 11. Sealing end face, 12. Stem cover, 13. Valve core cover, 14. Valve core sleeve end cover, 15. Delay hole, 16. Valve core return spring, 17. Delay reset cavity, 18. Valve housing, 19. Sealing ring A, 20. Sealing ring B, 21. Sealing ring C, 22. Sealing ring D, 23. Sealing ring E, 24. Outlet chamber, 25. Sealing Circle F, 26. Water inlet cavity

Detailed ways

In the embodiment shown in Figure 1, the floating spool (3), spool cover (13), valve stem (6), valve stem cover (12), spool return spring (16), sealing ring A (19) , sealing ring C (21), sealing ring D (22) and sealing ring F (25) form a floating spool assembly, and the delay reset chamber (17) is the spool sleeve (2), the spool sleeve end cover (14) In the space surrounded by the floating spool assembly, a time-delay hole (15) is opened on the wall of the time-delay reset chamber (17) (belonging to the end cover of the valve core sleeve (14)), which determines the time-delay self-closing valve The time required for the spool to close the water flow; the spool return spring (16) is installed in the inner cavity of the floating spool (3), and its two ends respectively bear on the spool cover (13) and the valve stem cover (12). (13) has a hole to connect the delay reset cavity (17) with the inner cavity of the floating valve core (3); the valve stem (6) is an integral structure, which is easy to ensure the coaxiality between the cylindrical surfaces and the cylindrical surface Perpendicularity with the end face, one end of which penetrates into the floating valve core (3) and is threadedly connected with the valve stem cover (12), and the other end is also threadedly connected with the button (7); the valve stem return spring (8) is mounted on In the cavity surrounded by the spool cover (2) and the button (7), its two ends respectively bear on an inner end surface of the spool cover (2) and the button (7); the spool cover (2) and the floating valve Sealing ring A (19), sealing ring C (21), sealing ring D (22) and sealing ring F (25) are used to seal between the core components; On the sleeve (2), when the time-delay self-closing spool was closed, the water inlet (4) and the water outlet (10) were not connected to each other, and when opened, the water inlet (4) and the water outlet (10) were connected. The sealing end surface (11) is the end surface used for sealing between the floating spool (3) and the spool sleeve (2); when the self-closing spool works, the floating spool assembly moves along the inner cylindrical surface A (1), the inner cylindrical surface B(5) and the inner cylindrical surface C(9) move, and the radii of these inner cylindrical surfaces decrease sequentially along the direction of the reset of the floating spool assembly (that is, close the self-closing valve), so that the inner cylindrical surface in the spool sleeve And the sealing end face is processed in one clamping using a combined tool, thereby greatly improving the coaxiality and verticality, and the productivity is high and the cost is low.

Fig. 2 is an application example of the utility model, that is, a time-delayed self-closing valve. The utility model is threadedly connected with the valve casing (18), sealed with the sealing ring B (20) and the sealing ring E (23), the water inlet (4) communicates with the water inlet cavity (26), and the water outlet (10) and the water outlet Cavity (24) communicates.

Below in conjunction with Fig. 2 illustrate the operating principle of the present utility model: Fig. 1 and Fig. 2 state when not working, promptly self-closing valve closed state. When the button (7) is pressed, the valve stem (6) is pushed to open the delay reset cavity (17), and the water in the delay reset cavity (17) passes through the gap between the valve stem (6) and the floating spool (3) . The water outlet (10) is discharged from the water outlet chamber (24). Under the water pressure of the water inlet (4) and the driving force of the valve stem (6), the floating valve core (3) moves to the delay reset chamber (17) Moving inside, the water inlet (4) is connected with the water outlet (10), and the water flows out from the water outlet chamber (24) through the water inlet chamber (26), the water inlet (4), and the water outlet (10), and the time-delayed self-closing valve open. Unclamp the button (7), the valve stem (6) closes the delay reset chamber (17) under the action of the valve stem return spring (8), and under the action of the valve core return spring (16), the floating spool (3 ) gradually reset (that is, gradually close the water flow), until the floating valve core (3) cuts off the water flow, and completes the automatic closing of the time-delayed self-closing valve. During the automatic closing process of the self-closing valve, with the reset of the floating spool (3), the volume of the delay reset chamber (17) gradually increases, and the water in the water inlet chamber (26) continuously flows from the delay hole (15) Supplemented in the time-delay reset chamber (17), the size of the water flow in the time-delay hole (15) determines the reset speed of the floating spool (3); because the time-delay hole (15) is generally relatively small, the water flow through it is small, Therefore, it takes a certain period of time for the automatic closing of the delayed self-closing valve, and this period of time is called a delay. Since the coaxiality of the inner cylindrical surface A (1), inner cylindrical surface B (5) and inner cylindrical surface C (9) and their perpendicularity to the sealing end surface (11) are well guaranteed during the processing, so During use, the floating spool assembly is not prone to unilateral wear, thereby reducing wear and prolonging service life.

Claims (1)

1. A general time-delay wear-resistant self-closing valve core, mainly including several parts such as a valve core sleeve, a floating valve core, a valve stem, a button, a time-delay hole, a spring and a sealing ring, and is characterized in that: the time-delay reset cavity is In the space surrounded by the spool sleeve, the end cover of the spool sleeve and the floating spool assembly, there is a delay hole on the wall of the delay reset cavity, and the two ends of the spool return spring in the inner cavity of the floating spool are connected to the spool cover and the valve core respectively. The rod cover is in contact with the delay reset cavity and the inner cavity of the floating spool; the spool sleeve has three inner cylindrical surfaces that cooperate with the floating spool assembly, and the radii of these three inner cylindrical surfaces decrease in turn in the reset direction of the floating spool assembly. Small, the stem is a one-piece stem.

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