Stop valve

Abstract

A stop valve is characterized by comprising a valve body (1), a valve seat (2), a valve rod (3) and a set of inflation rubber rings (4), the valve seat (2) is installed on the inner wall of a circulation cavity in the middle of the valve body (1), a valve clack (5) is arranged at the bottom of the valve rod (3), the valve rod (3) is movably installed in the valve body (1) in a sealed mode, the valve rod (3) is rotated to drive the valve clack (5) to ascend or descend in the valve body (1), and the valve clack (5) descends and presses the top of the valve clack (5); the valve has the advantages that gas in the inflation rubber ring is reduced along with temperature reduction, space is reserved, and the valve is prevented from being broken after water in the valve is frozen. The sealing performance of the valve clack and the valve seat is good.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a globe valve. Background Art

[0002] At present, valves are everywhere in daily production and life. All water pipelines cannot do without the control of various valves, which brings great convenience to people's production and life. Generally, a valve only consists of a valve body and a valve core. People control the flow of water through the opening and closing of the valve core. However, when people use valves in winter, if the heat preservation measures for pipelines and valves are not good, the valves are often burst due to cold climate, solidification and expansion of the pipeline water. Moreover, this phenomenon is very common, resulting in valve scrapping, economic losses, loss of water control, a large amount of leakage, affecting normal production and life, and even causing floods, threatening people's lives and property safety. Content of the Utility Model

[0003] The purpose of the utility model is to provide a globe valve aiming at the above deficiencies.

[0004] The utility model includes a valve body, a valve seat, a valve stem and a group of inflatable rubber rings.

[0005] The valve seat is installed on the inner wall of the central flow cavity of the valve body. A valve flap is arranged at the bottom of the valve stem. The valve stem is movably and sealingly installed in the valve body. By rotating the valve stem, the valve flap is driven to rise or fall in the valve body. When the valve flap descends, it presses tightly on the top of the valve seat to close the central flow cavity. Rubber ring installation grooves are respectively arranged on the inner walls of the inlet pipe and the outlet pipe of the valve body. A group of inflatable rubber rings are installed in the corresponding rubber ring installation grooves.

[0006] Internal threads are arranged on the inner wall of the central flow cavity of the valve body, and external threads are arranged on the outer wall of the valve seat. The valve seat is threadedly installed on the inner wall of the central flow cavity of the valve body.

[0007] An annular inclined sealing surface is formed on the inner wall of the top of the valve seat, and an annular inclined sealing protrusion matching the annular inclined sealing surface is arranged on the lower outer wall of the valve flap.

[0008] One side of the rubber ring installation groove is the open end of the valve body, and the other side is the inner cavity of the valve body. The inner wall diameter of the valve body on one side of the rubber ring installation groove is larger than the inner wall diameter of the valve body on the other side of the rubber ring installation groove.

[0009] After the inflatable rubber ring is inflated and expanded, the inner ring section of the inflatable rubber ring is arc-shaped, and the outer ring section of the inflatable rubber ring is rectangular.

[0010] An air nozzle installation groove is arranged on the outer ring of the inflatable rubber ring, and an air nozzle is arranged in the air nozzle installation groove.

[0011] A valve cover is arranged on the top of the valve body. The valve stem is movably and sealingly installed in the valve cover through packing sealing, and the bottom of the valve stem is located inside the valve body.

[0012] There is a rubber ring installation groove inside the opening at the top of the valve body, and an inflatable rubber ring is arranged inside the rubber ring installation groove.

[0013] The advantages of the present utility model are as follows: as the temperature decreases, the gas inside the inflatable rubber ring shrinks, creating space to prevent the water inside the valve from bursting the valve after freezing. The sealing performance between the valve flap and the valve seat is good. Description of the Drawings

[0014] Figure 1 It is a schematic cross-sectional structure diagram of the present utility model.

[0015] Figure 2 It is a schematic structure diagram of the inflatable rubber ring of the present utility model.

[0016] Figure 3 It is a schematic structure diagram of the inflation nozzle of the present utility model. Detailed Implementation Modes

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0019] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0020] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, in the description of the present invention, if terms such as "first", "second", etc. are used only for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0021] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and defined, if the terms "set" and "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] As shown in the attached drawings, the utility model includes a valve body 1, a valve seat 2, a valve rod 3, and a set of inflatable rubber rings 4.

[0023] The valve seat 2 is installed on the inner wall of the flow-through cavity in the middle of the valve body 1. A valve flap 5 is provided at the bottom of the valve rod 3. The valve rod 3 is movably and sealingly installed in the valve body 1. By rotating the valve rod 3, the valve flap 5 is driven to rise or fall in the valve body 1. When the valve flap 5 descends, it presses tightly on the top of the valve flap 5 to close the middle flow-through cavity. Rubber ring installation grooves are respectively provided on the inner walls of the inlet pipe and the outlet pipe of the valve body 1, and a set of inflatable rubber rings 4 are installed in the corresponding rubber ring installation grooves.

[0024] Internal threads are provided on the inner wall of the middle flow-through cavity of the valve body 1, and external threads are provided on the outer wall of the valve seat 2. The valve seat 2 is threadedly installed on the inner wall of the middle flow-through cavity of the valve body 1.

[0025] An annular inclined sealing surface is formed on the inner wall at the top of the valve seat 2, and an annular inclined sealing protrusion matching the annular inclined sealing surface is provided on the lower outer wall of the valve flap 5.

[0026] One side of the rubber ring installation groove is the open end of the valve body, and the other side is the inner cavity of the valve body. The inner wall diameter of the valve body 1 on one side of the rubber ring installation groove is larger than the inner wall diameter of the valve body 1 on the other side of the rubber ring installation groove.

[0027] After the inflatable rubber ring 4 is inflated and expanded, the inner ring cross-section of the inflatable rubber ring 4 is arc-shaped, and the outer ring cross-section is rectangular. The arc-shaped inner ring cross-section reduces the resistance to water flow. The rectangular outer ring cross-section makes the inflatable rubber ring 4 fit more tightly with the rubber ring installation groove.

[0028] An air nozzle installation groove is provided on the outer ring of the inflatable rubber ring 4, and an air nozzle 6 is provided in the air nozzle installation groove. The hidden air nozzle does not affect the installation of the inflatable rubber ring 4.

[0029] A valve cover is provided at the top of the valve body 1. The valve rod 3 is movably and sealingly installed in the valve cover through packing sealing, and the bottom of the valve rod 3 is located inside the valve body 1.

[0030] A rubber ring installation groove is provided in the opening at the top of the valve body 1, and an inflatable rubber ring 4 is provided in the rubber ring installation groove. Adding an inflatable rubber ring 4 at the top of the valve body 1 allows for more space when the water freezes.

[0031] Example 1: Install the valve body 1 on the water conveyance pipeline. Water flows into the lower chamber of the valve body 1, flows into the upper chamber along the valve seat 2, and then is output. When it is necessary to close the valve, turn the handwheel at the top of the valve stem 3, and the valve flap 5 moves downward and presses tightly on the sealing surface at the top of the valve seat 2 to cut off the water flow. When the temperature is normal, the inflatable rubber ring 4 expands and fills the rubber ring installation groove. When the temperature drops below zero degrees Celsius, the water inside the valve freezes. At the same time, the gas inside the inflatable rubber ring 4 shrinks, and the inflatable rubber ring 4 becomes deflated, creating space for ice formation and preventing the valve from bursting.

Claims

1. A stop valve, characterized in that It comprises a valve body (1), a valve seat (2), a valve stem (3) and a set of inflatable rubber rings (4). The valve seat (2) is mounted on the inner wall of the middle flow cavity of the valve body (1), a valve disc (5) is arranged at the bottom of the valve stem (3), and the valve stem (3) is movably sealed and mounted in the valve body (1). The valve stem (3) is rotated to drive the valve disc (5) to rise or fall in the valve body (1), and the valve disc (5) is lowered and pressed against the top of the valve disc (5), closing the middle flow cavity. Rubber ring mounting grooves are respectively arranged on the inner walls of the inlet pipe and the outlet pipe of the valve body (1), and a group of inflatable rubber rings (4) are mounted in the corresponding rubber ring mounting grooves.

2. A stop valve according to claim 1, characterized in that: An internal thread is arranged on the inner wall of the flow cavity in the middle of the valve body (1), an external thread is arranged on the outer wall of the valve seat (2), and the valve seat (2) is threadedly mounted on the inner wall of the flow cavity in the middle of the valve body (1).

3. A stop valve according to claim 2, characterized in that: An annular inclined sealing surface is provided on the inner wall at the top of the valve seat (2), and an annular inclined sealing protrusion matching the annular inclined sealing surface is provided on the lower outer wall of the valve flap (5).

4. A stop valve according to claim 3, characterized in that: One side of the rubber ring installation groove is the valve body opening end, the other side of the rubber ring installation groove is the valve body inner cavity, and the inner wall diameter of the valve body (1) on one side of the rubber ring installation groove is larger than the inner wall diameter of the valve body (1) on the other side of the rubber ring installation groove.

5. A stop valve according to claim 4, characterized in that: After the inflatable rubber ring (4) is inflated, the inner ring cross section of the inflatable rubber ring (4) is arc-shaped, and the outer ring cross section of the inflatable rubber ring (4) is rectangular.

6. A stop valve according to claim 5, characterized in that: An air nozzle installation groove is arranged on the outer ring of the inflatable rubber ring (4), and an inflatable nozzle (6) is arranged in the air nozzle installation groove.

7. A stop valve according to claim 1, characterized in that: A valve cover is arranged on the top of the valve body (1), the valve stem (3) is installed in the valve cover through a seasoning seal movable seal, and the bottom of the valve stem (3) is located in the valve body (1).

8. A stop valve according to claim 7, characterized in that: A rubber ring installation groove is arranged in the top opening of the valve body (1), and an inflatable rubber ring (4) is arranged in the rubber ring installation groove.

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