A stop valve

Abstract

The utility model discloses a stop valve, comprising: a valve body, a valve cover and a valve core, the valve cover is arranged on the valve body, a flow channel for medium circulation is arranged in the valve body, the valve core is movably arranged in the valve body to separate the flow channel into an inlet flow channel and an outlet flow channel, and the movement of the valve core controls the conduction and closing of the inlet flow channel and the outlet flow channel, and is characterized in that: it also comprises a valve stem, a shaft sleeve and a handwheel, the valve stem comprises an upper valve stem and a lower valve stem, the lower valve stem is connected to the valve core, the upper valve stem is connected to the handwheel, and the upper valve stem and the lower valve stem are detachably connected through the shaft sleeve for transmission, the upper valve stem and the shaft sleeve are detachably connected, through this arrangement, by arranging the valve stem and the handwheel in a form separate from the stop valve, after opening or closing the stop valve, the handwheel and the valve stem are removed to prevent others from opening and closing the stop valve, thereby realizing the function of preventing accidental touch.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a stop valve. Background Art

[0002] The stop valve, also known as the gate valve, is a forced sealing valve. Therefore, when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to prevent leakage. The opening and closing parts of the stop valve are plug-shaped valve discs, and the sealing surface is a flat surface or a sea cone surface. The valve disc moves linearly along the center line of the valve seat. The movement form of the valve stem is also a lifting and rotating rod type, which can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media.

[0003] In the prior art, in common water pipelines, the stop valve serves as a functional element for opening and closing the pipeline and plays an important role. In some water pipelines with a relatively long overall length, there are multiple stop valves, some of which are installed in public places or outdoor places with a large flow of people. Therefore, there is a possibility that the stop valves may be accidentally twisted by non-staff or maliciously damaged by people with ill intentions. Therefore, there is room for improvement. Summary of the invention

[0004] In view of the above problems, the present application proposes a stop valve, which realizes the function of preventing accidental touch by setting the valve stem and the hand wheel as separate parts from the stop valve. After opening or closing the stop valve, the hand wheel and the valve stem are removed to prevent others from opening and closing the stop valve. The stop valve is specifically realized by the following technical solutions:

[0005] A stop valve comprises: a valve body, a valve cover and a valve core, the valve cover is arranged on the valve body, a flow channel for medium circulation is arranged in the valve body, the valve core is movably arranged in the valve body to separate the flow channel into an inlet flow channel and an outlet flow channel, and the movement of the valve core controls the conduction and closing of the inlet flow channel and the outlet flow channel, and also comprises a valve stem, a shaft sleeve and a handwheel, the valve stem comprises an upper valve stem and a lower valve stem, the lower valve stem is connected to the valve core, the upper valve stem is connected to the handwheel, and the upper valve stem and the lower valve stem are detachably connected through the shaft sleeve, and the upper valve stem and the shaft sleeve are detachably connected.

[0006] It is further configured that a mounting hole is provided on the valve cover, and the sleeve is rotatably arranged in the mounting hole along the center axis. The inner end and the outer end of the sleeve are respectively provided with a first axial hole and a second axial hole, which are respectively used to connect with the upper valve stem and the lower valve stem. Through this configuration, the upper valve stem and the lower valve stem are connected through the transmission of the sleeve.

[0007] It is further configured that the first axial hole is configured as a square hole, and the inner end of the upper valve stem is adapted to be configured as a square rod to match the square hole. Through this configuration, it is convenient to rotate the handwheel to drive the upper valve stem to rotate while simultaneously rotating the shaft sleeve to realize the rotation of the shaft sleeve in the mounting hole.

[0008] It is further configured that the second axial hole is provided with an internal thread, the lower valve stem is provided with an external thread, and the lower valve stem is connected to the second axial hole through a threaded connection. Through this configuration, when the sleeve rotates, the lower valve stem is driven to translate through the threaded cooperation.

[0009] It is further provided that a limiting protrusion is also provided on the inner edge of the inner end of the mounting hole, and the valve stem is provided with a limiting track groove extending axially corresponding to the limiting protrusion, and when the lower valve stem is threadedly connected to the second axial hole, the limiting protrusion is arranged in the limiting track groove. Through this arrangement, the circumferential rotation of the lower valve stem is limited by the limiting protrusion, so that the lower valve stem can translate along the limiting track groove under the action of the thread, thereby realizing the opening and closing function of the valve core.

[0010] Further configuration includes an upper cover, which is arranged on the upper end of the valve cover, and the upper cover is provided with an opening adapted to the square hole at the position corresponding to the first axial hole, the upper valve stem passes through the opening and is inserted into the square hole, and the upper cover presses the sleeve in the mounting hole. Through this configuration, the sleeve on the valve cover is pressed to prevent it from falling out, and the overall structure is more stable.

[0011] It is further provided that a sealing ring is provided at the connection between the valve cover and the valve body. Through this provision, the sealing performance of the entire valve is enhanced.

[0012] The stop valve described above is configured with a separate upper valve stem and a lower valve stem, and the lower valve stem and the upper valve stem are connected by a shaft sleeve. During use, the shaft sleeve is driven to rotate circumferentially by the upper valve stem, and the lower valve stem is driven to translate axially under the limiting action of the limiting protrusion, thereby realizing the opening and closing function of the valve. In addition, because the shaft sleeve is plug-in-connected to the upper valve stem, it is convenient to disassemble, and the hand wheel can be retracted to prevent accidental rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1Front cross-sectional view of the stop valve provided in the embodiment of the present application Figure 1 ;

[0015] Figure 2 The stop valve provided in the embodiment of the present application Figure 1 Enlarged view of part A in the middle;

[0016] Figure 3 Front cross-sectional view of the stop valve provided in the embodiment of the present application Figure 1 ;

[0017] Figure 4 The stop valve provided in the embodiment of the present application Figure 3 Enlarged view of part B in the middle.

[0018] Among them, the reference numerals in the figure are:

[0019] 1. Valve body; 2. Valve cover; 3. Valve core; 4. Flow channel; 5. Inlet flow channel; 6. Outlet flow channel; 7. Valve stem; 21. Bushing; 8. Handwheel; 9. Upper valve stem; 10. Lower valve stem; 11. Mounting hole; 12. First shaft hole; 13. Second shaft hole; 14. Square hole; 15. Square rod; 16. Limiting protrusion; 17. Limiting track groove; 18. Upper cover; 19. Opening; 20. Sealing ring. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] The present application is further described with reference to the accompanying drawings and specific implementation methods:

[0023] Please also read Figures 1 to 4A stop valve comprises: a valve body 1, a valve cover 2 and a valve core 3, the valve cover 2 is arranged on the valve body 1, a flow channel 4 for medium circulation is arranged in the valve body 1, the valve core 3 is movably arranged in the valve body 1 to separate the flow channel 4 into an inlet flow channel 5 and an outlet flow channel 6, and the movement of the valve core 3 controls the conduction and closing of the inlet flow channel 5 and the outlet flow channel 6, and also comprises a valve stem 7, a shaft sleeve 21 and a hand wheel 8, the valve stem 7 comprises an upper valve stem 9 and a lower valve stem 10, the lower valve stem 10 is connected to the valve core 3, the upper valve stem 9 is connected to the hand wheel 8, and the upper valve stem 9 and the lower valve stem 10 are detachably connected through the shaft sleeve 21, and the upper valve stem 9 is detachably connected to the shaft sleeve 21.

[0024] See also Figures 1 to 4In this embodiment, a mounting hole 11 is provided on the valve cover 2, and the shaft sleeve 21 is rotatably provided in the mounting hole 11 along the central axis. The inner end and the outer end of the shaft sleeve 21 are respectively provided with a first shaft hole 12 and a second shaft hole 13, which are respectively used to connect with the upper valve stem 9 and the lower valve stem 10. The upper valve stem 9 is inserted into the first peripheral hole; the first shaft hole 12 is set as a square hole 14, and the inner end of the upper valve stem 9 is adapted to be set as a square rod 15 with the square hole 14, so that the upper valve stem 9 can be disassembled more conveniently and the upper valve stem 9 and the hand can be put away. Wheel 8, to prevent others from accidentally touching the handwheel 8 and causing unexpected opening and closing. In this way, when the handwheel 8 drives the upper valve stem 9 to rotate, because the upper valve stem 9 is a square rod 15 and the first axial hole 12 is a square hole 14, the upper valve stem 9 can drive the sleeve 21 to rotate circumferentially in the mounting hole 11. In addition, other shapes such as pentagons, triangles or hexagons can also play the same role; the second axial hole 13 is provided with an internal thread, and the lower valve stem 10 is provided with an external thread. The lower valve stem 10 and the second axial hole 13 are connected by Threaded connection, so arranged, when the shaft sleeve 21 rotates in the mounting hole 11, it does not move, and at the same time, the lower valve stem 10 is under the action of threaded cooperation with the second shaft hole 13, and the inner edge of the inner end of the mounting hole 11 is also provided with a limiting protrusion 16, and the valve stem 7 is provided with a limiting track groove 17 extending axially corresponding to the limiting protrusion 16. When the lower valve stem 10 is threadedly connected in the second shaft hole 13, the limiting protrusion 16 is arranged in the limiting track groove 17. With such an arrangement, the lower valve stem 10 is subject to the limiting effect of circumferential rotation, so This transformation is driven by the rotation of the sleeve 21 and is guided by the extension direction of the limit guide groove. This translation movement realizes the basic function of opening and closing the valve; it also includes an upper cover 18, which is arranged on the upper end of the valve cover 2, and the upper cover 18 is provided with an opening 19 adapted to the square hole 14 at the position corresponding to the first axial hole 12, the upper valve stem 9 passes through the opening 19 and is inserted into the square hole 14, and the upper cover 18 presses the sleeve 21 in the mounting hole 11; a sealing ring 20 is provided at the connection between the valve cover 2 and the valve body 1.

[0025] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A stop valve, comprising: A valve body (1), a valve cover (2) and a valve core (3), wherein the valve cover (2) is arranged on the valve body (1), a flow channel (4) for medium circulation is arranged in the valve body (1), the valve core (3) is movably arranged in the valve body (1) to separate the flow channel (4) into an inlet flow channel (5) and an outlet flow channel (6), and the movement of the valve core (3) controls the opening and closing of the inlet flow channel (5) and the outlet flow channel (6), wherein the valve body (1) is provided with a valve cover (2) and a valve core (3), wherein the valve cover (2) is provided on the valve body (1), and the valve core (3) is provided with a valve cover (3) and a valve core (3), wherein the valve cover (2) is provided on the valve body (1), and the valve core (3) is provided with a valve cover (2 ... The invention further comprises a valve stem (7), a shaft sleeve (21) and a hand wheel (8), wherein the valve stem (7) comprises an upper valve stem (9) and a lower valve stem (10), wherein the lower valve stem (10) is connected to the valve core (3), and the upper valve stem (9) is connected to the hand wheel (8), and the upper valve stem (9) and the lower valve stem (10) are detachably connected via the shaft sleeve (21), and the upper valve stem (9) and the shaft sleeve (21) are detachably connected.

2. A stop valve according to claim 1, characterized in that The valve cover (2) is provided with a mounting hole (11), and the shaft sleeve (21) is rotatably arranged in the mounting hole (11) along the central axis. The inner end and the outer end of the shaft sleeve (21) are respectively provided with a first shaft hole (12) and a second shaft hole (13), which are respectively used to connect with the upper valve stem (9) and the lower valve stem (10).

3. A stop valve according to claim 2, characterized in that The first shaft hole (12) is configured as a square hole (14), and the inner end of the upper valve stem (9) is adapted to be configured as a square rod (15) in accordance with the square hole (14).

4. A stop valve according to claim 2, characterized in that The second axial hole (13) is provided with an internal thread, the lower valve stem (10) is provided with an external thread, and the lower valve stem (10) is connected to the second axial hole (13) via a thread.

5. A stop valve according to claim 4, characterized in that The inner edge of the inner end of the mounting hole (11) is also provided with a limiting protrusion (16), and the valve stem (7) is provided with a limiting track groove (17) extending along the axial direction corresponding to the limiting protrusion (16); when the lower valve stem (10) is threadedly connected to the second axial hole (13), the limiting protrusion (16) is arranged in the limiting track groove (17).

6. A stop valve according to claim 3, characterized in that : It also includes an upper cover (18), which is arranged on the upper end of the valve cover (2), and the upper cover (18) is provided with an opening (19) adapted to the square hole (14) at a position corresponding to the first shaft hole (12), the upper valve stem (9) passes through the opening (19) and is inserted into the square hole (14), and the upper cover (18) presses the shaft sleeve (21) into the mounting hole (11).

7. A stop valve according to claim 1, characterized in that A sealing ring (20) is provided at the connection between the valve cover (2) and the valve body (1).

Images