Sealing butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, and discloses a sealing butterfly valve which comprises a valve body, a rotating shaft is rotatably inserted into the valve body, a valve plate fixedly sleeves the outer circumferential surface of the rotating shaft, a base is arranged in the valve body, and heating rods arranged at equal intervals are fixedly connected to the front surface of the base. According to the sealing butterfly valve, the base and the heating rod are arranged in the valve body, so that the temperature around the valve plate is controllable, a threaded pipe is driven to move downwards when a control rod rotates, a fixing block is driven to drive a positioning rod to move under the action of the inclined face of the fixing block and the inclined face of the positioning rod, and then the positioning rod is inserted into a positioning groove; the effects that the valve plate is prevented from being damaged by water solidification volume expansion, rotation of the valve plate during closing can be limited, the sealing performance of the butterfly valve is improved are achieved, and the problems that the valve plate of an existing butterfly valve is likely to rotate after being closed, and when the temperature is low, the water solidification volume can be expanded, the valve plate is prone to being damaged, and the sealing performance of the butterfly valve is improved are solved. And the sealing performance of the butterfly valve is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of butterfly valves, and in particular to a sealed butterfly valve. Background Art

[0002] The butterfly valve, also known as the flap valve, is a simple regulating valve that can be used for the on-off control of low-pressure pipeline media. The butterfly valve refers to a valve whose closing part (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing. The valve 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. It mainly plays a role of cutting off and throttling on the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating.

[0003] After the valve plate of the existing butterfly valve is closed, the valve plate may rotate under the action of the fluid, and when the temperature is low, the solidified volume of water will expand, which may easily damage the valve plate and reduce the sealing performance of the butterfly valve. Utility Model Content

[0004] In response to the deficiencies in the prior art, the present application provides a sealed butterfly valve, which has the advantages of being able to limit the valve plate when the valve plate is closed to prevent the valve plate from rotating, and being able to heat the butterfly valve at low temperatures to prevent the valve plate from being damaged by volume expansion when water solidifies, thereby improving the sealing of the butterfly valve. It solves the problem that after the valve plate is closed, the valve plate of the existing butterfly valve may rotate under the action of the fluid, and when the temperature is low, the volume of the solidified water will expand, which may easily cause damage to the valve plate, resulting in reduced sealing of the butterfly valve.

[0005] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a sealed butterfly valve, comprising a valve body, a rotating shaft rotatably inserted inside the valve body, a valve plate fixedly sleeved on the outer circumferential surface of the rotating shaft, a base provided inside the valve body, a front side of the base fixedly connected with equidistantly arranged heating rods, the outer surface of the heating rods fixedly inserted with the interior of the valve body, an outer shell fixedly connected with the upper surface of the valve body, a positioning cylinder rotatably inserted inside the outer shell, the bottom surface of the positioning cylinder fixedly connected with the upper surface of the rotating shaft, a control rod rotatably inserted inside the positioning cylinder, a threaded tube threadedly connected to the outer circumferential surface of the control rod, a fixed block fixedly connected to the bottom surface of the threaded tube, and two positioning rods slidably connected to the interior of the positioning cylinder through empty grooves.

[0006] Through the above scheme, since the existing butterfly valve has the possibility of rotating under the action of the fluid after the valve plate is closed, and when the temperature is low, the water solidification volume will expand, which is easy to damage the valve plate, resulting in reduced sealing of the butterfly valve. By arranging a base and a heating rod inside the valve body, the temperature around the valve plate can be controlled to prevent the expansion of the water solidification volume from damaging the valve plate. When the control rod is rotated, the threaded tube is driven downward, and the fixed block drives the positioning rod to move under the action of its own inclined surface and the inclined surface of the positioning rod, so that the positioning rod is inserted into the positioning groove, thereby preventing the valve plate from rotating and improving the sealing of the butterfly valve.

[0007] Furthermore, a collar is fixedly sleeved on the outer circumferential surface of each positioning rod, a spring is fixedly connected to one side of the collar away from the fixed block, and the other end of the spring is fixedly connected to the inner wall of the positioning cylinder.

[0008] Through the above solution, the positioning rod is forced to automatically move back by the spring, thereby releasing the positioning restriction on the valve plate and preventing the normal opening and closing operation of the valve plate from being affected.

[0009] Furthermore, two first limiting plates are fixedly connected to the outer circumferential surface of the threaded tube, and the outer surface of each of the first limiting plates is slidably connected to the interior of the positioning tube.

[0010] Through the above solution, the threaded tube is restricted to prevent the threaded tube from rotating along with the control rod, so that the threaded tube always drives the fixed block to move up and down.

[0011] Furthermore, a limiting ring is fixedly sleeved on the outer circumferential surface of the control rod, and the outer circumferential surface of the limiting ring is rotatably connected to the inside of the positioning cylinder.

[0012] Through the above solution, the control rod is restricted to prevent the control rod from sliding and rising and falling longitudinally, thereby increasing the stability of the control rod movement.

[0013] Furthermore, the inner bottom wall of the positioning cylinder is fixedly connected to a limiting seat, and the limiting seat is located directly below the fixing block.

[0014] Through the above solution, the fixing block is supported, so that the fixing block stays at a certain height, and then the positioning rod is pushed to insert into the positioning groove to position the valve plate.

[0015] Furthermore, the outer circumferential surface of each positioning rod is fixedly connected to a second limiting plate, and the outer surface of the second limiting plate is slidably connected to the interior of the positioning cylinder.

[0016] Through the above solution, the positioning rod is restricted to prevent the positioning rod from rotating, thereby increasing the stability of the positioning rod movement.

[0017] Furthermore, the lower end of the fixing block is formed into two symmetrical inclined surfaces, and one end of the positioning rod close to the fixing block is formed into an inclined surface.

[0018] Through the above solution, the fixing block can drive the positioning rod to move toward both sides under the action of its own inclined surface and the inclined surface of the positioning rod during the downward movement of the fixing block, so that the positioning rod is inserted into the positioning groove to position the valve plate.

[0019] Furthermore, two positioning grooves are provided inside the shell, and the positioning grooves correspond to the positions of the positioning rods.

[0020] Through the above scheme, the valve plate is restricted by the positioning rod and the positioning groove, so that the valve plate is prevented from easily rotating when closed, thereby improving the sealing performance of the butterfly valve.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0022] The sealing butterfly valve is provided with a base and a heating rod inside the valve body, so that the temperature around the valve plate can be controlled. When the control rod is rotated, the threaded tube is driven downward, so that the fixed block drives the positioning rod to move under the action of its own inclined surface and the inclined surface of the positioning rod, and then the positioning rod is inserted into the positioning groove, so as to avoid the damage of the valve plate by the expansion of the solidified water volume, and can limit the rotation of the valve plate when closed, thereby improving the sealing performance of the butterfly valve, and solves the problem that the valve plate of the existing butterfly valve may rotate after closing, and when the temperature is low, the solidified water volume will expand, which is easy to damage the valve plate and cause the sealing performance of the butterfly valve to be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the overall three-dimensional structure diagram of this application;

[0024] Figure 2 This is the overall cross-sectional structural diagram of this application;

[0025] Figure 3 This is the structural diagram of the positioning tube for this application;

[0026] Figure 4 This is the structural diagram of the heating rod for this application.

[0027] In the figure:

[0028] 1. Valve body; 2. Rotating shaft; 3. Valve plate; 4. Base; 5. Heating rod; 6. First limit plate; 7. Limit seat; 8. Shell; 9. Positioning cylinder; 10. Control rod; 11. Threaded tube; 12. Fixed block; 13. Positioning rod; 14. Positioning groove; 15. Ring; 16. Spring; 17. Second limit plate; 18. Limit ring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] See also Figure 1 , Figure 2 and Figure 3 A sealing butterfly valve in this embodiment includes a valve body 1, a rotating shaft 2 is rotatably inserted inside the valve body 1, a valve plate 3 is fixedly sleeved on the outer circumferential surface of the rotating shaft 2, a base 4 is provided inside the valve body 1, and the front of the base 4 is fixedly connected to equidistantly arranged heating rods 5, the outer surface of the heating rods 5 is fixedly inserted into the interior of the valve body 1, the upper surface of the valve body 1 is fixedly connected to a shell 8, a positioning cylinder 9 is rotatably inserted inside the shell 8, the bottom surface of the positioning cylinder 9 is fixedly connected to the upper surface of the rotating shaft 2, a control rod 10 is rotatably inserted inside the positioning cylinder 9, a threaded tube 11 is threadedly connected to the outer circumferential surface of the control rod 10, a fixed block 12 is fixedly connected to the bottom surface of the threaded tube 11, and two positioning rods 13 are slidably connected to the interior of the positioning cylinder 9 through an empty groove.

[0031] See also Figure 3 The outer circumferential surface of each positioning rod 13 is fixedly sleeved with a ring 15, and the side of the ring 15 away from the fixed block 12 is fixedly connected with a spring 16, and the other end of the spring 16 is fixedly connected to the inner wall of the positioning tube 9. The spring 16 enables the positioning rod 13 to automatically move back, thereby releasing the positioning restriction on the valve plate 3 and avoiding affecting the normal opening and closing operation of the valve plate 3.

[0032] See also Figure 3 Two first limit plates 6 are fixedly connected to the outer circumferential surface of the threaded tube 11. The outer surface of each first limit plate 6 is slidably connected to the inside of the positioning tube 9 to limit the threaded tube 11, prevent the threaded tube 11 from rotating with the control rod 10, and enable the threaded tube 11 to always drive the fixed block 12 to rise and fall.

[0033] See also Figure 3 The outer circumference of the control rod 10 is fixedly sleeved with a limit ring 18, and the outer circumference of the limit ring 18 is rotatably connected to the inside of the positioning tube 9 to limit the control rod 10, prevent the control rod 10 from sliding and rising longitudinally, and increase the stability of the movement of the control rod 10.

[0034] See also Figure 3The inner bottom wall of the positioning cylinder 9 is fixedly connected to the limiting seat 7, and the limiting seat 7 is located directly below the fixed block 12 to support the fixed block 12, so that the fixed block 12 stays at a certain height, and then pushes the positioning rod 13 to insert into the positioning groove 14 to position the valve plate 3.

[0035] See also Figure 2 and Figure 3 The outer circumferential surface of each positioning rod 13 is fixedly connected with a second limiting plate 17, and the outer surface of the second limiting plate 17 is slidably connected to the inside of the positioning tube 9 to limit the positioning rod 13, prevent the positioning rod 13 from rotating, and increase the stability of the movement of the positioning rod 13.

[0036] See also Figure 3 The lower end of the fixed block 12 is two symmetrical inclined surfaces, and one end of the positioning rod 13 close to the fixed block 12 is divided into an inclined surface, so that during the downward movement of the fixed block 12, the positioning rod 13 can be driven to move to both sides under the action of its own inclined surface and the inclined surface of the positioning rod 13, so that the positioning rod 13 is inserted into the positioning groove 14 to position the valve plate 3.

[0037] See also Figure 1 , Figure 2 and Figure 3 Two positioning grooves 14 are provided inside the housing 8, and the positioning grooves 14 correspond to the positions of the positioning rods 13. The valve plate 3 is restricted by the positioning rods 13 and the positioning grooves 14 to prevent the valve plate 3 from rotating easily when closed, thereby improving the sealing performance of the butterfly valve.

[0038] A sealed butterfly valve in the present embodiment, by arranging a base 4 and a heating rod 5 inside the valve body 1, makes the temperature around the valve plate 3 controllable, and drives the threaded tube 11 to move downward when the control rod 10 rotates, so that the fixing block 12 drives the positioning rod 13 to move under the action of its own inclined surface and the inclined surface of the positioning rod 13, and then the positioning rod 13 is inserted into the positioning groove 14, so as to avoid the expansion of the water solidification volume to damage the valve plate 3, and can limit the rotation of the valve plate 3 when closed, thereby improving the sealing effect of the butterfly valve, and solves the problem that the valve plate 3 of the existing butterfly valve may rotate after closing, and when the temperature is low, the water solidification volume will expand, which is easy to cause damage to the valve plate 3, resulting in reduced sealing of the butterfly valve.

[0039] It should be noted that a handle is provided on the outer circumference of the positioning tube 9 , and a knob is fixedly sleeved on the outer circumference of the control rod 10 , so that the user can operate the control rod 10 through the knob.

[0040] The working principle of the above embodiment is:

[0041] When it is necessary to limit the closed valve plate 3 to prevent the valve plate 3 from rotating, the rotating control rod 10 drives the threaded tube 11 to move downward, and the threaded tube 11 drives the fixed block 12 to move downward. The fixed block 12 pushes the positioning rod 13 to move to both sides under the action of its own inclined surface and the inclined surface of the positioning rod 13, and then the positioning rod 13 is inserted into the positioning groove 14, so that the positioning cylinder 9 can no longer rotate, and then the valve plate 3 can no longer rotate, and the valve plate 3 is positioned. The base 4 is connected to an external heating device. When the temperature is low, the external heating device can be started to heat the heating rod 5 through the base 4, so as to maintain a certain temperature around the valve plate 3 to prevent the water around the valve plate 3 from freezing and expanding, damaging the valve plate 3, and affecting the sealing of the butterfly valve.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0043] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A sealed butterfly valve, comprising a valve body (1), characterized in that: A rotating shaft (2) is rotatably inserted inside the valve body (1), and a valve plate (3) is fixedly sleeved on the outer circumferential surface of the rotating shaft (2). A base (4) is provided inside the valve body (1), and the front surface of the base (4) is fixedly connected to equidistantly arranged heating rods (5), and the outer surfaces of the heating rods (5) are fixedly inserted into the interior of the valve body (1). The upper surface of the valve body (1) is fixedly connected to an outer shell (8), and a positioning cylinder (9) is rotatably inserted inside the outer shell (8), and the bottom surface of the positioning cylinder (9) is fixedly connected to the upper surface of the rotating shaft (2). A control rod (10) is rotatably inserted inside the positioning cylinder (9), and the outer circumferential surface of the control rod (10) is threadedly connected to a threaded tube (11), and the bottom surface of the threaded tube (11) is fixedly connected to a fixed block (12). The interior of the positioning cylinder (9) is slidably connected to two positioning rods (13) via empty grooves.

2. A sealing butterfly valve according to claim 1, characterized in that: A collar (15) is fixedly sleeved on the outer circumferential surface of each positioning rod (13); a spring (16) is fixedly connected to the side of the collar (15) away from the fixed block (12); and the other end of the spring (16) is fixedly connected to the inner wall of the positioning cylinder (9).

3. A sealing butterfly valve according to claim 1, characterized in that: Two first limit plates (6) are fixedly connected to the outer circumferential surface of the threaded tube (11), and the outer surface of each of the first limit plates (6) is slidably connected to the interior of the positioning cylinder (9).

4. A sealing butterfly valve according to claim 1, characterized in that: The outer circumferential surface of the control rod (10) is fixedly sleeved with a limit ring (18), and the outer circumferential surface of the limit ring (18) is rotatably connected to the interior of the positioning cylinder (9).

5. A sealing butterfly valve according to claim 1, characterized in that: The inner bottom wall of the positioning cylinder (9) is fixedly connected to a limiting seat (7), and the limiting seat (7) is located directly below the fixed block (12).

6. A sealing butterfly valve according to claim 1, characterized in that: The outer circumferential surface of each positioning rod (13) is fixedly connected to a second limiting plate (17), and the outer surface of the second limiting plate (17) is slidably connected to the interior of the positioning cylinder (9).

7. A sealing butterfly valve according to claim 1, characterized in that: The lower end of the fixing block (12) is formed into two symmetrical inclined surfaces, and an end of the positioning rod (13) close to the fixing block (12) is formed into an inclined surface.

8. A sealing butterfly valve according to claim 1, characterized in that: Two positioning grooves (14) are provided inside the housing (8), and the positioning grooves (14) correspond to the positions of the positioning rods (13).

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