Ball valve capable of being opened and closed in labor-saving mode

Abstract

The ball valve is characterized in that a gland is in a sleeve shape and is mounted in a filler sleeve, and a cylindrical filler space is formed between the inner end of the gland in the length direction and a bottom plate ring; according to the ball valve capable of being opened and closed in a labor-saving mode, the packing sleeve is in a sleeve shape and installed in the valve rod seat, the inner end of the packing sleeve in the length direction is the annular bottom plate ring, the gland is in a sleeve shape and installed in the packing sleeve, and the cylindrical packing space is formed between the inner end of the gland in the length direction and the bottom plate ring; after the gland is connected to the packing sleeve, the gland presses packing in the packing space downwards, and therefore the packing forms sealing on the periphery of the valve rod. In the gland fixing process, the valve rod cannot be pressed downwards, and the valve rod cannot press the ball downwards; and the buckling edge on the valve rod is buckled with the clamping groove in the ball body, so that the valve rod does not move abnormally in the length direction.

Description

Technical Field

[0001] The utility model relates to the field of ball valve structures, and particularly relates to a ball valve with labor-saving opening and closing. Background Art

[0002] A ball valve is a common type of valve, and its structure mainly includes a spherical valve core and a valve body. There is a hole in the middle of the valve core that is equal to the pipe diameter. When the valve core rotates 90 degrees, the hole will align with the pipe, allowing fluid to pass through; when the valve core rotates to a position perpendicular to the pipe, the hole will be blocked and the fluid cannot pass through. Due to its characteristics such as rapid opening and closing, good sealing performance, and simple structure, the ball valve is widely used in various fluid control systems.

[0003] The common sealing method at the valve stem position in a ball valve is to set a protruding ring on the outer periphery of the valve stem, set sealing packing on the outer periphery of the valve stem above the protruding ring, and finally fix the sealing packing through a gland. In the above structure, while the gland fixes the sealing packing, it also presses the valve stem towards the sphere, thereby applying an unnecessary force to the sphere, making the sealing effect of the sphere unstable and also reducing the smoothness of the rotation process of the valve stem. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a ball valve with labor-saving opening and closing, aiming to solve the problem that while the gland fixes the sealing packing, it also presses the valve stem towards the sphere, thereby applying an unnecessary force to the sphere, making the sealing effect of the sphere unstable and also reducing the smoothness of the rotation process of the valve stem.

[0005] To achieve the above purpose, the utility model provides a ball valve with labor-saving opening and closing, including:

[0006] A valve body, which has a channel running through it along the length direction. The middle part of the length direction of the channel is a working cavity. The two ends of the valve body are respectively joint ends. A valve stem seat is provided on the outer wall of the valve body, and a rod channel runs through the valve stem seat in the height direction.

[0007] A packing sleeve, which is in a sleeve shape and is installed in the valve stem seat. The inner end of the packing sleeve in the length direction is an annular bottom plate ring. A sealing structure is provided between the packing sleeve and the valve stem seat.

[0008] A gland, which is in a sleeve shape and is installed in the packing sleeve. A cylindrical packing space is formed between the inner end of the gland in the length direction and the bottom plate ring.

[0009] A valve stem, which passes through the gland and the packing sleeve. The outer diameter of the valve stem matches the inner diameter of the gland and the inner diameter of the bottom plate ring. A buckling edge is provided at the central position of the inner end of the valve stem in the length direction.

[0010] The packing is compressed and arranged in the packing space;

[0011] A sphere is arranged in the working chamber. A clamping groove matching the buckling edge is arranged at the center position of one end of the sphere corresponding to the valve stem seat. When the clamping groove matches the buckling edge, the valve stem and the sphere are fixed in the circumferential direction and the height direction;

[0012] Two mounting heads are respectively detachably connected to the joint end to clamp the sphere.

[0013] Further, the profile of the buckling edge is inside the outer circumference of the valve stem.

[0014] Further, when the valve stem is combined with the sphere, the buckling edge is located in the channel.

[0015] Further, the packing sleeve and the valve stem seat are flange-connected.

[0016] Further, the connection between the gland and the packing sleeve is flange connection.

[0017] Further, the packing sleeve and the gland share fixing bolts.

[0018] Further, the gland and the valve stem seat are flange-connected, and the packing sleeve is clamped and fixed by the gland and the valve stem seat.

[0019] Further, the sphere is an integrally formed structure.

[0020] Further, the valve stem is an integrally formed structure.

[0021] Further, the sphere and the valve stem are made of cemented carbide materials.

[0022] The ball valve with labor-saving opening and closing provided by the utility model has a packing sleeve in a sleeve shape and installed in the valve stem seat. The inner end in the length direction of the packing sleeve is an annular bottom plate ring. The gland is in a sleeve shape and installed in the packing sleeve. A cylindrical packing space is formed between the inner end in the length direction of the gland and the bottom plate ring. After the gland is connected to the packing sleeve, the gland presses the packing in the packing space, so that the packing forms a seal around the valve stem. And during the fixing process of the gland, the valve stem will not be pressed down, and thus the valve stem will not press down the sphere. The buckling edge on the valve stem and the clamping groove on the sphere form a buckle connection, so that the valve stem will not move abnormally in the length direction. Description of the Drawings

[0023] Figure 1 is the longitudinal sectional view of the ball valve with labor-saving opening and closing according to an embodiment of the utility model;

[0024] Figure 2 is Figure 1Partial enlargement in

[0025] Figure 3 is a cross-sectional view of a ball valve with labor-saving opening and closing in an embodiment of the present utility model;

[0026] Figure 4 is Figure 3 a partial enlargement of

[0027] Figure 5 is a schematic diagram of the ball in a ball valve with labor-saving opening and closing in an embodiment of the present utility model;

[0028] Figure 6 is a schematic diagram of the valve stem in a ball valve with labor-saving opening and closing in an embodiment of the present utility model.

[0029] The realization, functional features and advantages of the object of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0030] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0031] Those skilled in the art of the present technology can understand that unless specifically stated otherwise, the singular forms "a", "an", "the", "above-mentioned" and "this" used herein may also include the plural forms. It should be further understood that the term "including" used in the specification of the present utility model means the presence of the described features, integers, steps, operations, elements, units, modules and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components and / or their groups. It should be understood that when we say an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of one or more related listed items.

[0032] Those skilled in the art of the present technology can understand that unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those of ordinary skill in the art to which the present utility model belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as here.

[0033] Referring to Figures 1 to 6 , in an embodiment of the present utility model, a ball valve with labor-saving opening and closing includes:

[0034] The valve body 100 has a channel running through it in the longitudinal direction. The middle part of the channel in the longitudinal direction is the working chamber. The two ends of the valve body 100 are respectively the joint ends. A valve rod seat 110 is provided on the outer wall of the valve body 100, and a rod channel runs through the valve rod seat 110 in the height direction.

[0035] The packing sleeve 200 is in a sleeve shape and is installed in the valve rod seat 110. The inner end of the packing sleeve 200 in the longitudinal direction is an annular bottom plate ring 210. A sealing structure is provided between the packing sleeve 200 and the valve rod seat 110.

[0036] The gland 300 is in a sleeve shape and is installed in the packing sleeve 200. A cylindrical packing space is formed between the inner end of the gland 300 in the longitudinal direction and the bottom plate ring 210.

[0037] The valve rod 400 passes through the gland 300 and the packing sleeve 200. The outer diameter of the valve rod 400 matches the inner diameter of the gland 300 and the inner diameter of the bottom plate ring 210. A fastening edge 410 is provided at the central position of the inner end of the valve rod 400 in the longitudinal direction.

[0038] The packing 500 is compressively arranged in the packing space.

[0039] The sphere 600 is arranged in the working chamber. At one end corresponding to the valve rod seat 110, a clamping groove 610 matching the fastening edge 410 is provided at the central position. Wherein, when the clamping groove 610 matches the fastening edge 410, the valve rod 400 and the sphere 600 form a circumferential fixation and a height - direction fixation.

[0040] Two mounting heads 700 are respectively detachably connected to the joint ends to clamp the sphere 600.

[0041] In the prior art, while the gland fixes the sealing packing, it also presses the valve rod towards the sphere, thus applying an unnecessary force to the sphere. This makes the sealing effect of the sphere unstable and also reduces the smoothness of the rotation process of the valve rod.

[0042] In the present utility model, the valve body 100 has a channel running through it in the longitudinal direction. The middle part of the channel in the longitudinal direction is the working chamber, which is the installation position for the subsequent sphere 600. The two ends of the valve body 100 are respectively the joint ends, which are the connection positions for the external pipelines. A valve rod seat 110 is provided on the outer wall of the valve body 100, and a rod channel runs through the valve rod seat 110 in the height direction. The rod channel is the installation position for the subsequent valve rod 400.

[0043] The packing sleeve 200 is in a sleeve shape and is installed inside the valve stem seat 110. The inner end in the length direction of the packing sleeve 200 is an annular bottom plate ring 210. A sealing structure (such as a sealing ring or a sealing sleeve, etc.) is provided between the packing sleeve 200 and the valve stem seat 110, so as to ensure the sealing effect between the outer wall of the packing sleeve 200 and the inner wall of the valve stem seat 110. The subsequent installation function of the packing 500 is realized through the packing sleeve 200. The existence of the packing sleeve 200 can complete the packing 500, avoiding the difficulty of integrally forming the bottom plate ring 210 on the valve stem seat 110, and also facilitating the filling process of the packing 500.

[0044] The gland 300 is in a sleeve shape and is installed inside the packing sleeve 200. A cylindrical packing space is formed between the inner end in the length direction of the gland 300 and the bottom plate ring 210. The packing space is the installation space for the subsequent packing 500. The fixing method of the gland 300 can be flange or threaded connection, etc.

[0045] The valve stem 400 passes through the gland 300 and the packing sleeve 200. The outer diameter of the valve stem 400 matches the inner diameter of the gland 300 and the inner diameter of the bottom plate ring 210. The matching of the above diameters is mainly to form the guidance of the valve stem 400 and produce a certain sealing effect. A buckling edge 410 is provided at the central position of the inner end in the length direction of the valve stem 400. The buckling edge 410 is used to connect the subsequent sphere 600.

[0046] The packing 500 is compressively arranged in the packing space. The packing 500 can be graphite or high polymer, etc. After the gland 300 is connected to the packing sleeve 200, the gland 300 presses down the packing 500 in the packing space, so that the packing 500 forms a seal around the valve stem 400. And during the fixing process of the gland 300 above, the valve stem 400 will not be pressed down, and the valve stem 400 will not press down the sphere 600.

[0047] The sphere 600 is arranged in the working chamber. A clamping groove 610 matching the buckling edge 410 is provided at the central position of one end of the sphere 600 corresponding to the valve stem seat 110. When the clamping groove 610 matches the buckling edge 410, the valve stem 400 and the sphere 600 form a circumferential fixation and a height direction fixation. The shapes of the clamping groove 610 and the buckling edge 410 are not limited, as long as they can achieve the buckling fit. In a typical implementation, the cross-section of the groove of the clamping groove 610 is in a T shape, and the cross-section of the buckling edge 410 is in a T shape, so that the two can form a buckle.

[0048] Two mounting heads 700 are respectively detachably connected to the joint ends to clamp the sphere 600. Soft sealing rings or hard sealing rings are provided on the mounting heads 700.

[0049] In summary, the packing sleeve 200 is in a sleeve shape and is installed in the valve stem seat 110. The inner end of the packing sleeve 200 in the length direction is an annular bottom plate ring 210. The gland 300 is in a sleeve shape and is installed in the packing sleeve 200. A cylindrical packing space is formed between the inner end of the gland 300 in the length direction and the bottom plate ring 210. After the gland 300 is connected to the packing sleeve 200, the gland 300 presses down the packing 500 in the packing space, so that the packing 500 forms a seal around the outer circumference of the valve stem 400. And during the fixing process of the gland 300, the valve stem 400 will not be pressed down, and the valve stem 400 will not press down the sphere 600 either. The buckling edge 410 on the valve stem 400 and the clamping groove 610 on the sphere 600 form a buckle connection, so that the valve stem 400 will not move abnormally in the length direction.

[0050] Referring to Figure 6 , in one embodiment, the profile of the buckling edge 410 is inside the outer circumference of the valve stem 400.

[0051] In this embodiment, the buckling edge 410 is not set beyond the outer circumference of the valve stem 400, so that the valve stem 400 can directly complete the plugging and unplugging actions, reducing the difficulty of installation and maintenance.

[0052] Referring to Figures 3 to 4 , in one embodiment, when the valve stem 400 is combined with the sphere 600, the buckling edge 410 is located in the channel.

[0053] In this embodiment, the sphere 600 can be conveniently installed into the channel of the valve body 100. During the installation process, after the valve stem 400 is installed, the sphere 600 can be installed from the channel to the working cavity position, and the buckling edge 410 on the valve stem 400 and the clamping groove 610 on the clamping sphere 600 form a combination.

[0054] Referring to Figure 1 , in one embodiment, the connection between the packing sleeve 200 and the valve stem seat 110 is a flange connection.

[0055] In this embodiment, the fixing method of the packing sleeve 200 is limited to a flange, and the connection is realized by bolts, which has the advantages of simple processing and stable performance.

[0056] Referring to Figure 1 , in one embodiment, the connection between the gland 300 and the packing sleeve 200 is a flange connection.

[0057] In this embodiment, the fixing method of the gland 300 is limited to a flange, and the connection is realized by bolts, which has the advantages of simple processing and stable performance.

[0058] Referring to Figure 1 , in one embodiment, the packing sleeve 200 and the gland 300 share fixing bolts.

[0059] In this embodiment, the holes for bolt fixation on the packing sleeve 200 and the gland 300 correspond to each other, so that the packing sleeve 200 and the gland 300 are fixed by the same set of bolts, reducing the structural cost and the difficulty of installation and disassembly.

[0060] In one embodiment, the gland 300 and the valve stem seat 110 are flange-connected, and the packing sleeve 200 is clamped and fixed by the gland 300 and the valve stem seat 110.

[0061] In this embodiment, considering the connection relationship among the gland 300, the packing sleeve 200 and the valve stem seat 110, the fixing method of the packing sleeve 200 is set to be clamping, so that the structure of the packing sleeve 200 can be simplified, and the difficulty of installation and disassembly is reduced.

[0062] In one embodiment, the sphere 600 is an integrally formed structure.

[0063] In this embodiment, the sphere 600 is defined as an integrally formed structure, which improves the structural strength and reduces the difficulty of installation and disassembly; the specific integrally formed method can be casting or machining center, etc. The material of the sphere 600 can be metal or polymer.

[0064] In one embodiment, the valve stem 400 is an integrally formed structure.

[0065] In this embodiment, the valve stem 400 is defined as an integrally formed structure, which improves the structural strength and reduces the difficulty of installation and disassembly; the specific integrally formed method can be casting or machining center, etc. The material of the valve stem 400 can be metal or polymer.

[0066] In one embodiment, the sphere 600 and the valve stem 400 are made of cemented carbide.

[0067] In this embodiment, by improving the structural strength of the sphere 600 and the valve stem 400, the structural strength at the combined position of the two is improved. Specifically, which alloy steel is selected for the materials of the two is chosen according to the actual use scenario.

[0068] In summary, for the ball valve with labor-saving opening and closing provided by the present utility model, the packing sleeve 200 is in a sleeve shape and installed in the valve stem seat 110. The inner end in the length direction of the packing sleeve 200 is an annular bottom plate ring 210. The gland 300 is in a sleeve shape and installed in the packing sleeve 200. A cylindrical packing space is formed between the inner end in the length direction of the gland 300 and the bottom plate ring 210. After the gland 300 is connected to the packing sleeve 200, the gland 300 presses down the packing 500 in the packing space, so that the packing 500 forms a seal around the outer circumference of the valve stem 400. And during the fixing process of the gland 300, the valve stem 400 will not be pressed down, and thus the valve stem 400 will not press down the ball 600. The buckling edge 410 on the valve stem 400 and the clamping groove 610 on the ball 600 form a buckling connection, so that the valve stem 400 will not move abnormally in the length direction.

[0069] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A ball valve that is labor-saving in opening and closing, characterized in that, Comprising: A valve body (100) having a channel penetrating therethrough in the longitudinal direction and with joint ends at both ends. The middle part of the channel is a working chamber. A valve stem seat (110) is provided on the outer wall of the valve body (100), and a rod channel penetrates through the valve stem seat (110) in the height direction; A packing sleeve (200) in a sleeve shape and installed in the valve stem seat (110). The inner end of the packing sleeve (200) in the length direction is an annular bottom plate ring (210); A gland (300) in a sleeve shape and installed in the packing sleeve (200). A cylindrical packing space is formed between the inner end of the gland (300) in the length direction and the bottom plate ring (210); A valve stem (400) passing through the gland (300) and the packing sleeve (200). The outer diameter of the valve stem (400) matches the inner diameter of the gland (300) and the inner diameter of the bottom plate ring (210). A fastening edge (410) is provided at the central position of the inner end of the valve stem (400) in the length direction; Packing (500) provided in the packing space; A sphere (600) provided in the working chamber. A clamping groove (610) matching the fastening edge (410) is provided at the central position of one end of the sphere (600) corresponding to the valve stem seat (110). Wherein, when the clamping groove (610) matches the fastening edge (410), the valve stem (400) and the sphere (600) form a circumferential fixation and a height-direction fixation; Two mounting heads (700) respectively connected to the joint ends to clamp the sphere (600).

2. The ball valve with labor-saving opening and closing according to claim 1, characterized in that, The contour of the fastening edge (410) is inside the outer circumference of the valve stem (400).

3. The ball valve with labor-saving opening and closing according to claim 1, characterized in that, When the valve stem (400) is combined with the sphere (600), the fastening edge (410) is located in the channel.

4. The ball valve with labor-saving opening and closing according to claim 1, wherein The connection between the packing sleeve (200) and the valve stem seat (110) is a flange connection.

5. The ball valve with labor-saving opening and closing according to claim 4, wherein, The connection between the gland (300) and the packing sleeve (200) is a flange connection.

6. The ball valve with labor-saving opening and closing according to claim 5, characterized in that, The packing sleeve (200) and the gland (300) share fixing bolts.

7. The ball valve with labor-saving opening and closing according to claim 1, characterized in that, The connection between the gland (300) and the valve stem seat (110) is a flange connection, and the packing sleeve (200) is clamped and fixed by the gland (300) and the valve stem seat (110).

8. The ball valve with labor-saving opening and closing according to claim 1, characterized in that, The sphere (600) is an integrally formed structure.

9. The ball valve with labor-saving opening and closing according to claim 8, characterized in that, The valve stem (400) is an integrally formed structure.

10. The ball valve with labor-saving opening and closing according to claim 9, characterized in that, The sphere (600) and the valve stem (400) are made of cemented carbide material.

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