Low-resistance light butterfly valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a low-resistance light butterfly valve which comprises a valve body, a fluid channel is arranged in the valve body, connecting flanges are arranged on the two sides of the valve body, and a valve plate driven by a valve rod is arranged in the valve body. The filtering section is arranged at one end of the valve body and located on the inlet side of the fluid channel, and the filtering section is used for filtering impurities in the fluid; the hand wheel is arranged at the top end of the valve rod; the extension arm is arranged on the hand wheel and used for increasing the length of a force arm when the valve rod rotates; compared with the prior art, the sealing performance of the valve plate can be guaranteed, the rotating difficulty of the valve rod is reduced, and a user can control the valve rod conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and in particular relates to a low-resistance light butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for the on-off control of low-pressure pipeline media. A butterfly valve refers to a valve whose closing part (valve disc or butterfly plate) is a disc, which rotates around the valve shaft to achieve opening and closing. It 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 cutting and throttling role on the pipeline. The butterfly valve opening and closing part is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening and closing or regulation. For example, a low-resistance and lightweight butterfly valve disclosed in the patent with application number CN202321168219.3 includes a valve body, a valve stem is installed on the top of the valve plate inside the valve body, a sealing packing and a sealing gasket are provided between the valve stem and the valve body, and a valve cover is installed on the top of the valve body;

[0003] During the use of existing butterfly valves, the valve stem will be subject to a certain resistance during rotation, causing inconvenience in opening. When the valve plate is opened, the valve plate will cause a certain resistance to the fluid, affecting the transmission of the fluid, and will also affect the valve plate, reducing the service life of the valve plate. At the same time, during the use of the butterfly valve, the valve plate is also easily affected by impurities, resulting in reduced sealing of the valve plate, so it is necessary to make improvements. Utility Model Content

[0004] The purpose of the utility model is to provide a low-resistance lightweight butterfly valve in view of the above-mentioned technical problems, so as to facilitate the opening of the valve plate and increase the service life of the valve plate, while reducing the influence of impurities in the fluid on the valve plate.

[0005] In view of this, the utility model provides a low-resistance lightweight butterfly valve, comprising:

[0006] A valve body, wherein a fluid channel is arranged in the valve body, connecting flanges are arranged on both sides of the valve body, and a valve plate driven by a valve stem is arranged in the valve body;

[0007] Also includes:

[0008] A filter section, which is arranged at one end of the valve body and located at the inlet side of the fluid channel, and is used to filter impurities in the fluid;

[0009] A hand wheel, the hand wheel being arranged at the top end of the valve stem;

[0010] An extension arm, the extension arm being arranged on the hand wheel and used to increase the length of the force arm when the valve stem rotates;

[0011] Wherein, the cross section of the valve plate is shuttle-shaped.

[0012] In the present technical solution, during the use of the butterfly valve, the setting of the filter section can effectively filter the impurities in the fluid, thereby preventing the impurities contained in the fluid from affecting the valve plate and ensuring the sealing performance of the valve plate. The valve plate with a shuttle-shaped cross-section can effectively reduce the impact of the fluid on the valve plate after opening, and reduce the resistance caused by the valve plate to the fluid. At the same time, when the valve plate is controlled by the valve stem, the extension arm can effectively increase the length of the force arm when the valve plate rotates, thereby reducing the difficulty of rotating the valve stem and facilitating the user to control the valve stem.

[0013] In the above technical solution, further, the extension arm also includes:

[0014] A receiving groove, wherein the receiving groove is arranged on the hand wheel;

[0015] A first arm body, the first arm body is movably arranged in the receiving groove, and the tail end of the first arm body is connected to the receiving groove through a first limiting rope;

[0016] A second arm body, the second arm body is movably arranged in the first arm body, and the tail end of the second arm body is connected to the first arm body through a second limiting rope;

[0017] The third arm body is movably arranged in the second arm body, and the tail end of the third arm body is connected to the second arm body through a third limiting rope.

[0018] In the above technical solution, further, after the first arm body, the second arm body and the third arm body are unfolded, they support each other through buckling friction.

[0019] In the above technical solution, further, the filtering section also includes:

[0020] A filter screen is arranged in the filtering section.

[0021] In the above technical solution, further, the filtering section also includes:

[0022] The collecting tank is arranged at the bottom of the filtering section and below the filter screen, and a sealing cover plate is detachably arranged at the bottom of the collecting tank.

[0023] The beneficial effects of the utility model are:

[0024] 1. The setting of the filter section can prevent the impurities contained in the fluid from affecting the valve plate, thus ensuring the sealing performance of the valve plate;

[0025] 2. The setting of the extension arm can effectively increase the length of the force arm when the valve plate rotates, thereby reducing the difficulty of rotating the valve stem and making it easier for users to control the valve stem;

[0026] 3. The shuttle-shaped valve plate can effectively reduce the impact of the fluid on the valve plate after the butterfly valve is opened, and reduce the resistance of the valve plate to the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 It is a schematic structural diagram of a specific implementation method of the utility model.

[0029] Figure 2 It is a cross-sectional structural schematic diagram of the utility model.

[0030] Figure 3 This is a schematic diagram of the valve plate structure of the utility model.

[0031] Figure 4 This is a schematic diagram of the hand wheel structure of the utility model.

[0032] Figure 5 This is a schematic diagram of the extension arm structure of the utility model.

[0033] Figure 6 It is a schematic diagram of the structure of the extension arm of the utility model under stress.

[0034] The symbols in the figure are:

[0035] 1. Valve body; 100. Fluid channel; 101. Connecting flange; 2. Valve stem; 3. Valve plate; 4. Filter section; 40. Filter screen; 41. Collecting tank; 42. Sealing cover plate; 5. Hand wheel; 6. Extension arm; 60. Receiving tank; 61. First arm body; 62. First limiting rope; 63. Second arm body; 64. Second limiting rope; 65. Third arm body; 66. Third limiting rope. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0038] Embodiment 1:

[0039] The embodiment of the present application provides a low-resistance lightweight butterfly valve, comprising: a valve body 1, a fluid channel 100 is arranged in the valve body 1, connecting flanges 101 are arranged on both sides of the valve body 1, and a valve plate 3 driven by a valve stem 2 is arranged in the valve body 1;

[0040] The valve body 1 also includes: a filter section 4, which is arranged at one end of the valve body 1 and located at the inlet side of the fluid channel 100, and is used to filter impurities in the fluid; a hand wheel 5, which is arranged at the top of the valve stem 2; and an extension arm 6, which is arranged on the hand wheel 5 and is used to increase the length of the force arm when the valve stem 2 rotates.

[0041] The cross section of the valve plate 3 is shuttle-shaped.

[0042] In this embodiment, during the use of the butterfly valve, the filter section 4 can effectively filter impurities in the fluid, thereby preventing the impurities contained in the fluid from affecting the valve plate 3 and ensuring the sealing performance of the valve plate 3. The valve plate 3 with a shuttle-shaped cross-section can effectively reduce the impact of the fluid on the valve plate 3 after opening, and reduce the resistance caused by the valve plate 3 to the fluid. At the same time, when the valve plate 3 is controlled by the valve stem 2, the extension arm 6 can effectively increase the length of the force arm when the valve plate 3 rotates, thereby reducing the difficulty of rotating the valve stem 2 and facilitating the user to control the valve stem 2.

[0043] Embodiment 2:

[0044] The present embodiment provides a low-resistance lightweight butterfly valve, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features: the extension arm 6 also includes: a receiving groove 60, which is arranged on the hand wheel 5; a first arm body 61, which is movably arranged in the receiving groove 60, and the tail end of the first arm body 61 is connected to the receiving groove 60 through a first limiting rope 62; a second arm body 63, which is movably arranged in the first arm body 61, and the tail end of the second arm body 63 is connected to the first arm body 61 through a second limiting rope 64; a third arm body 65, which is movably arranged in the second arm body 63, and the tail end of the third arm body 65 is connected to the second arm body 63 through a third limiting rope 66.

[0045] After being unfolded, the first arm 61, the second arm 63 and the third arm 65 are supported by each other through buckling friction.

[0046] The handwheel 5 is of conventional structure, the receiving groove 60 can be a cylindrical groove, the receiving groove 60 is arranged on the inner rod of the handwheel 5, the receiving groove 60 can be cylindrical, the first arm body 61 and the second arm body 63 can both be hollow cylindrical, the first arm body 61, the second arm body 63 and the third arm body 65 are all made of metal and preferably steel.

[0047] In this embodiment, when it is difficult to rotate the valve stem 2 by the hand wheel 5, the third arm body 65 is pulled to move it toward the outside of the hand wheel 5. As the third arm body 65 is pulled open, the second arm body 63 and the first arm body 61 are also pulled open. The first limiting rope 62, the second limiting rope 64 and the third limiting rope 66 can prevent the first arm body 61, the second arm body 63 and the third arm body 65 from separating during the unfolding process. After the extension arm 6 is unfolded, when the user applies force to the extension arm 6, a bending friction support can be formed between the second arm body 63 and the third arm body 65, thereby preventing the extension arm 6 from retracting when the hand wheel 5 is rotated by the extension arm 6. After the extension arm 6 is unfolded, the force arm length when the valve plate 3 is rotated can be effectively increased, thereby reducing the difficulty of rotating the valve stem 2 and facilitating the user to control the valve stem 2. The extension arm 6 has a simple structure and is easy to use, which effectively improves work efficiency.

[0048] Embodiment 3:

[0049] This embodiment provides a low-resistance lightweight butterfly valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the filter section 4 also includes: a filter screen 40, which is arranged in the filter section 4.

[0050] The filtering section 4 further includes: a collecting tank 41 , which is arranged at the bottom of the filtering section 4 and below the filter screen 40 , and a sealing cover plate 42 is detachably provided at the bottom of the collecting tank 41 .

[0051] The filter screen 40 is detachably installed in the filter section 4 in a conventional manner, and the filter screen 40 is preferably arranged at an angle. The collection groove 41 is located below the filter surface of the filter screen 40. The collection groove 41 is a raised area at the bottom of the filter section 4, which has a channel connected to the inside of the filter section 4. The sealing cover plate 42 at the bottom of the collection groove 41 is detachably installed at the bottom of the collection groove 41 in a conventional manner, such as a detachable connection by bolts.

[0052] In this embodiment, when the fluid passes through the filter 40, impurities contained in the fluid are filtered by the filter 40, and the impurities can gradually settle downward and fall into the collection tank 41. The impurities accumulated in the collection tank 41 can be cleaned by removing the sealing cover 42. Compared with the prior art, the utility model can prevent the impurities contained in the fluid from affecting the valve plate 3, thereby ensuring the sealing performance of the valve plate 3, and the impurities are easy to clean, thereby ensuring the filtering effect of the filter 40.

[0053] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A low resistance lightweight butterfly valve, comprising: A valve body (1), wherein a fluid channel (100) is arranged in the valve body (1), connecting flanges (101) are arranged on both sides of the valve body (1), and a valve plate (3) driven by a valve stem (2) is arranged in the valve body (1); It is characterized by further comprising: A filter section (4), the filter section (4) being arranged at one end of the valve body (1) and located at the inlet side of the fluid channel (100), the filter section (4) being used to filter impurities in the fluid; A hand wheel (5), wherein the hand wheel (5) is arranged at the top end of the valve stem (2); An extension arm (6), wherein the extension arm (6) is arranged on the hand wheel (5) and is used to increase the length of the force arm when the valve stem (2) rotates; Wherein, the cross section of the valve plate (3) is shuttle-shaped.

2. A low resistance light butterfly valve according to claim 1, characterized in that: The extension arm (6) further comprises: A receiving groove (60), wherein the receiving groove (60) is arranged on the hand wheel (5); A first arm body (61), the first arm body (61) is movably arranged in the receiving groove (60), and the tail end of the first arm body (61) is connected to the receiving groove (60) via a first limiting rope (62); A second arm body (63), wherein the second arm body (63) is movably arranged in the first arm body (61), and the tail end of the second arm body (63) is connected to the first arm body (61) via a second limiting rope (64); A third arm body (65), wherein the third arm body (65) is movably arranged in the second arm body (63), and the tail end of the third arm body (65) is connected to the second arm body (63) via a third limiting rope (66).

3. A low resistance light butterfly valve according to claim 2, characterized in that: After being unfolded, the first arm body (61), the second arm body (63) and the third arm body (65) are supported by each other through buckling friction.

4. A low resistance light butterfly valve according to claim 1, characterized in that: The filtering section (4) further comprises: A filter screen (40) is arranged in the filtering section (4).

5. A low resistance light butterfly valve according to claim 4, characterized in that: The filtering section (4) further comprises: A collecting trough (41), the collecting trough (41) being arranged at the bottom of the filtering section (4) and below the filter screen (40), and a sealing cover plate (42) being detachably arranged at the bottom of the collecting trough (41).

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