Ball valve with automatic pressure relief function

Abstract

The utility model provides a ball valve with an automatic pressure relief function. The ball valve comprises a valve body, a ball body is rotationally connected into the valve body, a pressure relief hole used for achieving pressure relief of a middle cavity in the valve body is formed in the ball body, the valve body is connected with an extension handle, and a heat preservation layer wraps the outer side of the extension handle to achieve heat preservation of the valve body. According to the ball valve, the extension handle used for externally placing the heat preservation layer is arranged, the heat preservation effect on the ball valve can be effectively achieved, meanwhile, when the ball valve is closed, automatic pressure relief of the middle cavity of the valve body can be achieved, and therefore the ball valve can be better used conveniently.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a ball valve with an automatic pressure relief function. Background Technology

[0002] A ball valve controls the flow of fluid through a rotating ball. Specifically, the opening and closing element (ball) is driven by the valve stem and rotates around the axis of the ball valve. Ball valves are mainly used in pipelines for shut-off, distribution, and changing the flow direction of the medium, and can also be used for fluid regulation and control.

[0003] When a ball valve is closed, all the fluid pressure acts on the valve core. This not only makes it difficult to open the valve when it has not been opened for a long time or when the fluid pressure is high, but also causes excessive fluid pressure in some areas when it is not fully open, leading to wear on the valve core and affecting its sealing performance. In addition, existing ball valves are not convenient to wrap with a heat insulation layer, resulting in poor heat insulation performance when used in cold environments, which is not conducive to the flow of the medium in the valve body. Utility Model Content

[0004] To address the problems existing in the prior art, a ball valve with an automatic pressure relief function is provided. This device, by incorporating an extension handle for the external insulation layer, effectively insulates the ball valve. Simultaneously, when the ball valve is closed, it automatically relieves pressure in the valve body cavity, thus facilitating the use of the ball valve.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] This utility model proposes a ball valve with automatic pressure relief function, including a valve body, a ball rotatably connected inside the valve body, the ball having a pressure relief hole for realizing pressure relief in the middle cavity of the valve body, the valve body being connected to an extension handle, and the outside of the extension handle being wrapped with a heat insulation layer to achieve heat preservation of the valve body.

[0007] Preferably, the cavity is formed between the outer wall of the ball and the inner wall of the valve body.

[0008] Preferably, when the ball rotates and closes the valve body, one end of the pressure relief hole is connected to the middle cavity, and the other end is connected to the outlet end of the valve body.

[0009] Preferably, the pressure relief hole is set in an inclined direction.

[0010] Preferably, an extension valve stem is rotatably disposed inside the extension handle, the extension handle and the valve body are fixedly connected, and the ball has a square hole for the extension valve stem to pass through.

[0011] Preferably, it also includes a handle, which is fixedly connected to the heightening valve stem by an extension screw. When the handle is rotated, it can drive the ball to rotate through the heightening valve stem.

[0012] Preferably, the extension handle is fixedly connected to a scale plate, and the handle is connected to an indicator head located on one side of the scale plate.

[0013] Preferably, the extension handle is fixedly connected to a limiting piece, the limiting piece has an arc-shaped groove, and the handle is threaded with a bolt, which passes through the arc-shaped groove and abuts against the surface of the limiting piece.

[0014] Preferably, the valve body is connected to a plurality of PT valves, and the PT valves are equipped with temperature and pressure monitoring mechanisms.

[0015] Preferably, the extension handle is also fixedly connected to a locking block for limiting the rotation angle of the indicator head, the locking block being located on one side of the end of the scale plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model provides an extension handle for the external insulation layer. The length of the extension handle is suitable to facilitate the wrapping of the insulation layer, which can effectively insulate the ball valve. At the same time, when the ball valve is closed, the two ends of the pressure relief hole are connected to the outlet end and the middle cavity respectively, which can realize automatic pressure relief in the middle cavity of the valve body, thus making the ball valve easier to use.

[0018] 2. This utility model also includes a scale plate. The indicator head and the scale plate work together to determine the opening and closing angle of the ball valve. At the same time, a limiting plate is provided. When the handle is rotated, the bolt slides in the arc groove, which can guide the rotation of the handle. By tightening the bolt, the bolt can abut against the limiting plate, which can lock the opening and closing angle of the handle, thereby better realizing the operation and use of the ball valve. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a three-dimensional view of the entire utility model;

[0021] Figure 2 This is the overall front view of this utility model;

[0022] Figure 3 This is an overall side view of the present invention;

[0023] Figure 4 This is a top view of the entire utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1 Valve body; 2 Ball; 3 Valve stem; 4 Sealing ring; 5 Valve seat; 6 Valve cover; 7 Extension handle; 8 Extended valve stem; 9 Extended screw; 10 Scale plate; 11 Limit plate; 12 Bolt; 13 Handle; 14 PT valve; 15 Extension rod; 16 Pressure relief hole; 17 Locking block; 18 Arc groove. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] like Figures 1-4 As shown, this embodiment proposes a ball valve with automatic pressure relief function, including a valve body 1, a ball 2 rotatably connected inside the valve body 1, one end of the valve body 1 is a water inlet, and the other end of the valve body 1 is threadedly connected to a valve cover 6, one end of the valve cover 6 is the valve outlet end.

[0028] A valve seat 5 is provided inside the valve body 1. The valve seat 5 is fixedly connected to the valve body 1 and rotatably connected to the ball 2. The valve seat 5 is configured to seal the ball 2 as it rotates, and at the same time, the valve seat 5 limits and guides the rotation of the ball 2.

[0029] A cavity is formed between the outer wall of the ball 2 and the inner wall of the valve body 1. The ball 2 is provided with a pressure relief hole 16 for relieving pressure in the cavity of the valve body 1. When the ball 2 rotates to close the valve body 1, the pressure relief hole 16 is set in an inclined direction. One end of the pressure relief hole 16 is connected to the cavity, and the other end is connected to the outlet end of the valve body 1. At this time, the pressure relief hole 16 can relieve pressure in the cavity and prevent excessive pressure in the cavity.

[0030] The valve body 1 is connected to an extension handle 7. The extension handle 7 is wrapped with an insulation layer to achieve insulation of the valve body 1. The insulation layer can be divided into inorganic insulation materials, such as rock wool, glass wool and ceramic fiber, and organic insulation materials, such as polystyrene foam and polyurethane foam, which can be selected according to actual needs.

[0031] The wrapping method can be, for example, direct wrapping: the roll or sheet of insulation material is directly wrapped around the extension handle 7 and secured with materials such as fiberglass cloth or aluminum foil tape. Prefabricated insulation sleeve: a prefabricated insulation sleeve is directly fitted onto the extension handle 7; a wire mesh fixing layer can be provided on the inside of the insulation sleeve to enhance the stability of the insulation layer.

[0032] The length of the extension handle 7 is suitable, being longer or shorter than the length of the valve body 1, thus facilitating the wrapping of the insulation layer and effectively insulating the ball valve. At the same time, when the ball valve is closed, the two ends of the pressure relief hole 16 are connected to the outlet end and the middle cavity respectively, enabling automatic pressure relief of the middle cavity of the valve body 1, thereby facilitating the use of the ball valve.

[0033] An extended valve stem 8 is rotatably installed inside the extension handle 7. The extension handle 7 and the valve body 1 are fixedly connected. The ball 2 has a square hole for the extended valve stem 8 to pass through. The length of the extended valve stem 8 is longer than that of the extension handle 7. After the bottom end of the extended valve stem 8 passes through the square hole of the valve handle 8, when the extended valve stem 8 rotates, it can drive the ball 2 to rotate synchronously, thereby realizing the rotation of the ball 2.

[0034] It also includes a handle 13, which is fixedly connected to the heightened valve stem 8 by an extension screw 9. The heightened valve stem 8 has an elongated threaded groove. The extension screw 9 is screwed into the threaded groove of the heightened valve stem 8 and then abuts against the surface of the handle 13, so that when the handle 13 is rotated, the ball 2 can be rotated through the heightened valve stem 8.

[0035] The extension handle 7 is fixedly connected to a scale plate 10, and the handle 13 is fixedly connected to an indicator head located on one side of the scale plate 10. The scale plate 10 is circular. When the handle 13 is rotated, the handle 13 drives the indicator head to rotate at the same time. The indicator head can move along the scale of the scale plate 10, thereby displaying the opening and closing angle of the ball 2 at this time, which is convenient for the control of the ball valve.

[0036] The extension handle 7 is fixedly connected to the limiting plate 11, which has an arc-shaped groove 18. The handle 13 is threaded with a bolt 12. After the bolt 12 passes through the arc-shaped groove 18, it can abut against the surface of the limiting plate 11. When the bolt 12 is loosened, the bolt 12 can move freely in the arc-shaped groove 18. At this time, the arc-shaped groove 18 can also limit and guide the rotation of the handle 13.

[0037] The middle part of the limiting plate 11 has a through hole for the extension screw 9 to pass through. The extension screw 9 can pass through the limiting plate 11 to connect the handle 13 and the extended valve stem 8.

[0038] The valve body 1 is connected to several PT valves 14. The PT valves 14 are equipped with temperature and pressure monitoring mechanisms. The PT valves 14 are self-sealing structures. By unscrewing the cap of the PT valves 14 and connecting a probe or thermometer, the temperature and pressure of the medium inside the valve body 1 can be measured in real time, thereby determining the flow of the medium inside the valve body 1.

[0039] The extension handle 7 is also fixedly connected to a locking block 17 for limiting the rotation angle of the indicator head. The locking block 17 is located on the end side of the scale plate 10. When the indicator head and the locking block 17 come into contact, the handle 13 can no longer rotate, and the surface has already rotated to the end.

[0040] The indicator head and scale plate 10 work together to determine the opening and closing angle of the ball valve 2. At the same time, the limit plate 11 is set so that when the handle 13 is rotated, the bolt 12 slides in the arc groove 18, which can guide the rotation of the handle 13. By tightening the bolt 12, the bolt 12 can abut against the limit plate 11, which can lock the opening and closing angle of the handle 13, thereby better realizing the operation and use of the ball valve.

[0041] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A ball valve having an automatic pressure relief function, comprising a valve body (1), characterized in that, A ball (2) is rotatably connected inside the valve body (1). The ball (2) has a pressure relief hole (16) for releasing pressure in the inner cavity of the valve body (1). An extension handle (7) is connected to the valve body (1). An insulation layer is wrapped around the outside of the extension handle (7) to keep the valve body (1) warm.

2. The ball valve with automatic pressure relief function according to claim 1, characterized in that, The cavity is formed between the outer wall of the ball (2) and the inner wall of the valve body (1).

3. The ball valve with automatic pressure relief function according to claim 1, characterized in that, When the ball (2) rotates and closes the valve body (1), one end of the pressure relief hole (16) is connected to the middle cavity, and the other end is connected to the outlet end of the valve body (1).

4. The ball valve with automatic pressure relief function according to claim 1, characterized in that, The pressure relief hole (16) is set in an inclined direction.

5. The ball valve with automatic pressure relief function according to claim 1, characterized in that, An extension rod (8) is rotatably provided inside the extension handle (7). The extension handle (7) and the valve body (1) are fixedly connected. The ball (2) has a square hole for the extension rod (8) to pass through.

6. A ball valve with automatic pressure relief function according to claim 5, characterized in that, It also includes a handle (13), which is fixedly connected to the heightened valve stem (8) by an extension screw (9). When the handle (13) rotates, it can drive the ball (2) to rotate through the heightened valve stem (8).

7. A ball valve with automatic pressure relief function according to claim 6, characterized in that, The extension handle (7) is fixedly connected to a scale plate (10), and the handle (13) is connected to an indicator head located on one side of the scale plate (10).

8. The ball valve with automatic pressure relief function according to claim 6, characterized in that, The extension handle (7) is fixedly connected to a limiting piece (11), the limiting piece (11) has an arc groove (18), and the handle (13) is threaded with a bolt (12). The bolt (12) passes through the arc groove (18) and abuts against the surface of the limiting piece (11).

9. The ball valve with automatic pressure relief function according to claim 1, characterized in that, The valve body (1) is connected to a number of PT valves (14), and the PT valves (14) are equipped with temperature and pressure monitoring mechanisms.

10. The ball valve with automatic pressure relief function according to claim 7, characterized in that, The extension handle (7) is also fixedly connected to a locking block (17) for limiting the rotation angle of the indicator head, and the locking block (17) is located on one side of the end of the scale plate (10).

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