Novel rubber lining butterfly valve

Abstract

The utility model provides a novel rubber lining butterfly valve which comprises a valve body and a valve plate, a valve rod is arranged in the valve body, the valve plate is arranged in the valve body through the valve rod, the valve plate is connected with the valve rod through a taper pin, the radial section of the valve plate along the valve rod is in an S shape, a plurality of adjusting teeth are further arranged on the inner arc face of the valve plate, and the adjusting teeth are arranged on the valve rod. The valve plate has the advantages that through the special adjusting teeth and the curved surface structure, the curved surface valve plate can provide a smoother fluid channel and reduce turbulent flow and vortex of fluid at the valve plate, so that fluid resistance and energy loss are reduced, the opening degree of the valve plate is allowed to be finely adjusted through the design of the adjusting teeth, and the service life of the valve plate is prolonged. Finer flow and pressure control is realized, and the adjusting precision is improved.

Description

Technical Field

[0001] The utility model relates to the field of butterfly valves, in particular to a new type of rubber-lined butterfly valve. Background Art

[0002] With the gradual improvement of China's industrialization level, in industries such as nuclear power, petroleum, chemical industry, metallurgy, and steelmaking, there are more and more working conditions with strong corrosive media and the need for high-precision regulation. Therefore, the demand for valves with both strict cut-off and high-precision regulation performance and strong corrosion resistance is increasing. The rubber-lined butterfly valve has the advantages of small size, light weight, low cost, and strong acid and alkali resistance and other strong corrosion resistance. At the same time, it has good sealing performance and is especially suitable for the transportation and control of various corrosive media. The conventional rubber-lined butterfly valves on the market are generally the same in structure, and their main parts all include core parts such as valve bodies, valve stems, valve plates, and rubber valve seats. Due to the strong ductility of the non-metallic valve seat, the rubber-lined butterfly valve can achieve double-sided tight sealing, and different non-metallic valve seats can be selected according to different media to achieve strong corrosion resistance such as acid and alkali resistance. However, the valve plates of existing rubber-lined butterfly valves all adopt conventional structures;

[0003] The Chinese patent "A Seat Sealing Structure of a Center Line Rubber-Lined Butterfly Valve", application number: 201820384420.2 provides a seat sealing structure of a conventional rubber-lined butterfly valve. A labyrinth structure is correspondingly arranged on the valve body at the position corresponding to the mating surface of the valve seat end, and at the same time, multiple sealing rings are arranged at both end faces of the valve seat, which can effectively solve the problems of internal leakage and external leakage of the rubber-lined butterfly valve. Similar solutions of other rubber-lined butterfly valves can also achieve the double-sided sealing performance of the valve. However, in working conditions that require precise flow regulation, such as the cooling device in a steel mill, it is necessary to adjust the flow rate of cooling water by the precise flow control ability of the valve to ensure the quality of the steel plate. In such working conditions, the existing rubber-lined butterfly valve solutions cannot meet the function of precise flow regulation required in the working conditions. Summary of the Utility Model

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a new type of rubber-lined butterfly valve to solve the technical problem that the existing rubber-lined butterfly valve solutions in the prior art cannot meet the function of precise flow regulation required in the working conditions.

[0005] To achieve the above purpose and other related purposes, the present utility model provides a new type of rubber-lined butterfly valve, including:

[0006] A valve body, in which a valve stem is provided;

[0007] A valve plate, the valve plate is arranged in the valve body through the valve stem, and the valve plate and the valve stem are connected by a tapered pin;

[0008] On both sides of the valve plate, a plurality of adjusting teeth are provided, and the adjusting teeth on one side of the valve plate are away from those on the other side.

[0009] The advantages of adopting the above technical solutions are that through the special adjusting tooth structure, the design of the adjusting teeth allows for fine adjustment of the opening degree of the valve plate, realizing more precise flow rate and pressure control, and improving the adjustment accuracy.

[0010] Optionally, the adjusting teeth are in the shape of a frustum of a pyramid, the large end of the adjusting teeth is connected to the valve plate, the adjusting teeth are arranged near the edge of the valve plate, and the adjusting teeth are arranged near the edge of the valve plate.

[0011] Optionally, the adjusting teeth on the same side are arranged at equal intervals.

[0012] Optionally, the sealing surface of the valve plate is in a cosine wave shape or a spherical surface.

[0013] Optionally, a plurality of positioning bosses are provided on the back of the valve plate, and the positioning bosses are distributed on both sides of the valve stem hole of the valve plate along the axial direction.

[0014] Optionally, a plurality of assembly platforms are further provided on the back of the valve plate.

[0015] Optionally, a valve seat is further provided in the valve body, the sealing surface of the valve seat is in a cosine wave shape or a spherical surface, and a torsion seal is formed between the sealing surface of the valve seat and the sealing surface of the valve plate.

[0016] Optionally, the valve body includes an upper shaft hole and a lower shaft hole, both the upper shaft hole and the lower shaft hole are communicated with the inner cavity of the valve body, one end of the valve stem is located in the lower shaft hole, the other end of the valve stem extends out from the upper shaft hole, a conical groove is provided on the end face of the valve stem located in the lower shaft hole, an end cover is further provided at the orifice of the lower shaft hole, the end cover is arranged on the valve body through bolts, a screw hole is further provided at the center of the end cover, an adjusting screw is installed on the screw hole, a groove is provided on the end face of the extending end of the adjusting screw, the groove is arranged opposite to the conical groove, an adjusting steel ball is provided between the groove and the conical groove, and the groove and the conical groove clamp the adjusting steel ball.

[0017] Optionally, a bearing is further provided between the valve stem and the valve body.

[0018] Optionally, a ring groove is further provided on the outer side of the end of the valve stem located in the mounting hole, and a split ring is clamped in the ring groove.

[0019] As described above, a new type of rubber-lined butterfly valve of the present utility model has the following beneficial effects: through the special adjusting tooth structure, the design of the adjusting teeth allows for fine adjustment of the opening degree of the valve plate, realizing more precise flow rate and pressure control, and improving the adjustment accuracy. Brief Description of the Drawings

[0020] Figure 1 Shown as a schematic structural view in an embodiment of the present utility model;

[0021] Figure 2 Shown as a schematic sectional structural view in an embodiment of the present utility model;

[0022] Figure 3 Shown as Figure 2 a partially enlarged view at X in;

[0023] Figure 4 Shown as a schematic structural view of a valve plate in an embodiment of the present utility model;

[0024] Figure 5 Shown as a schematic sectional structural view of a valve plate in an embodiment of the present utility model.

[0025] Description of part numbers

[0026] 1 Valve body

[0027] 2 Valve stem

[0028] 3 Valve plate

[0029] 301 Adjusting tooth

[0030] 302 Positioning boss

[0031] 303 Assembly platform

[0032] 4 Valve seat

[0033] 5 End cover

[0034] 6 Adjusting screw

[0035] 7 Adjusting steel ball

[0036] 8 Split ring

[0037] 9 gland Detailed implementation manners

[0038] The following uses specific specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model.

[0039] Please refer to Figures 1 to 5It should be noted that the illustrations provided in this embodiment only schematically illustrate the basic concept of the present utility model. The illustrations only show the components related to the present utility model, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component during its implementation can be arbitrarily changed, and the component layout type may also be more complex. The structures, ratios, sizes, etc. depicted in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present utility model can be implemented. Therefore, they do not have technical essential significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed by the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope within which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present utility model can be implemented.

[0040] Please refer to Figures 1 through 5 as shown, the present utility model provides a new rubber-lined butterfly valve, including:

[0041] a valve body 1, in which a valve stem 2 is provided;

[0042] a valve plate 3, which is arranged in the valve body 1 through the valve stem 2, and the valve plate 3 is connected to the valve stem 2 through a taper pin;

[0043] The radial cross-section of the valve plate 3 along the valve stem 2 is S-shaped, and a plurality of adjusting teeth 301 are further provided on the inner arc surface of the valve plate 3.

[0044] It should also be noted that the valve plate 3 is designed to be S-shaped. The curved valve plate can provide a smoother fluid passage, reduce the turbulence and eddy current of the fluid at the valve plate, thereby reducing fluid resistance and energy loss. By adjusting the opening degree of the curved valve plate, the flow rate and pressure of the fluid can be precisely controlled to meet the different requirements of the system for flow rate and pressure.

[0045] Exemplarily, the adjusting teeth are frustum-shaped, the large-mouth end of the adjusting teeth is connected to the valve plate, the adjusting teeth are arranged close to the edge of the valve plate, and the adjusting teeth 301 are arranged close to the edge of the valve plate 3.

[0046] It should also be noted that the design of the adjusting teeth 301 allows for fine adjustment of the opening degree of the valve plate to achieve more precise flow rate and pressure control. Among them, the adjusting teeth 301 cooperate with corresponding driving mechanisms such as motors and pneumatic actuators to achieve remote or automatic control, improving the automation degree and adjustment accuracy of the system.

[0047] Furthermore, the width of each adjusting tooth 301, the spacing between two adjacent adjusting teeth 301, and the number of adjusting teeth 301 can be analyzed through CAE flow simulation to simulate the on-site working condition requirements and complete the design of the tooth shape, structure, number, and size of the adjusting tooth 301.

[0048] Meanwhile, by optimizing the shape and size of the curved surface valve plate, the resistance of the fluid to the valve plate can be reduced, thereby reducing the torque required by the driving mechanism. Due to the fine design of the curved surface valve plate and the adjusting teeth, the valve can adjust the flow rate and pressure within a wide range, thus achieving a high regulation ratio.

[0049] Furthermore, adding an appropriate lubricant between the adjusting teeth 301 can reduce friction and wear and further reduce the driving torque.

[0050] Exemplarily, the adjusting teeth 301 on the same side are arranged at equal intervals.

[0051] It should also be noted that the equal-spacing arrangement of the adjusting teeth 301 makes the adjustment amount of each step uniform and predictable when adjusting the opening degree of the valve plate. The equal-spacing adjusting teeth 301 can ensure uniform force on the valve plate during the adjustment process and reduce vibration and noise caused by uneven force.

[0052] Exemplarily, the sealing surface of the valve plate 3 is a cosine wave shape, a spherical shape, or an arc surface.

[0053] It should also be noted that the sealing surface of the valve plate 3 being a cosine wave shape, a spherical shape, or an arc surface can increase the contact area between the sealing surface and the valve seat, thereby improving the reliability and tightness of the seal. This design can ensure effective contact of the sealing surface under different working conditions and prevent fluid leakage.

[0054] Furthermore, compared with plane sealing, the cosine wave shape, spherical shape, or arc surface can disperse the contact pressure during the sealing process, reduce local wear, and extend the service life of the valve.

[0055] Exemplarily, a plurality of positioning bosses 302 are provided on the back surface of the valve plate 3, and the positioning bosses 302 are distributed on both sides of the valve stem hole of the valve plate 3 along the axial direction.

[0056] It should also be noted that the valve plate 3 can be integrally cast, and the positioning bosses 302 can be directly cast on the back surface of the valve plate 3 for easy machining. The purpose of setting the positioning bosses 302 is to directly mount the valve plate 3 on the machine tool workbench for machining the sealing surface of the valve plate 3.

[0057] Exemplarily, a plurality of assembly platforms 303 are further provided on the back surface of the valve plate 3.

[0058] It should also be noted that the assembly platform 303 is located at positions near the shaft holes above and below the valve plate, reducing the machining difficulty of the tapered pin holes. Meanwhile, the conical holes for connecting the valve stem can be machined, which can reduce the reaming process after the valve stem and the valve plate are assembled, and reduce the transfer and machining costs.

[0059] Exemplarily, a valve seat 4 is further provided in the valve body 1. The sealing surface of the valve seat 4 is a cosine wave shape, a spherical shape or an arc surface, and forms a torsion seal with the sealing surface of the valve plate 3.

[0060] It should also be noted that the sealing surface of the valve seat 4 adopts a cosine wave shape, a spherical shape or an arc surface that matches the sealing surface of the valve plate 3, which can ensure the sealing effect to the greatest extent.

[0061] Exemplarily, the valve body 1 includes an upper shaft hole and a lower shaft hole. Both the upper shaft hole and the lower shaft hole are connected to the inner cavity of the valve body 1. One end of the valve stem 2 is located in the lower shaft hole, and the other end of the valve stem 2 extends out from the upper shaft hole. A tapered groove is provided on the end face of the valve stem 2 located in the lower shaft hole. An end cover 5 is further provided at the orifice of the lower shaft hole. The end cover 5 is arranged on the valve body 1 through bolts. A screw hole is further provided at the center of the end cover 5. An adjusting screw 6 is installed on the screw hole. A groove is provided on the end face of the extending end of the adjusting screw 6. The groove is arranged opposite to the tapered groove. An adjusting steel ball 7 is provided between the groove and the tapered groove, and the groove and the tapered groove clamp the adjusting steel ball 7.

[0062] It should also be noted that the valve stem 2, the adjusting screw 6 and the adjusting steel ball 7 form a special structure that can micro-adjust the central position of the valve plate. The design of the adjusting steel ball 8 reduces the rotation resistance of the valve stem 10 driving the valve plate 14, reduces the torque, and can make the valve switch operate more smoothly.

[0063] Exemplarily, a bearing is further provided between the valve stem 2 and the valve body 1.

[0064] It should also be noted that the purpose of setting the bearing is to reduce the frictional resistance between the valve stem 2 and the valve body 1.

[0065] Exemplarily, a ring groove is further provided on the outer side of the end of the valve stem 2 located in the mounting hole, and a split ring 8 is clamped in the ring groove.

[0066] It should also be noted that the main purpose of the design of the split ring 8 is to improve the sealing performance, reduce the operation difficulty and torque, improve the stability and reliability, and facilitate maintenance and replacement. The valve stem 2 can automatically align with the sealing surface of the valve seat 4 during the closing process, ensuring the tightness of the seal. This reduces the leakage problem caused by the misalignment of the sealing surfaces.

[0067] Exemplarily, a sealing ring is also provided between the end cover 5 and the valve body 1, and a sealing ring is also provided between the adjusting screw 6 and the end cover 5.

[0068] Exemplarily, the valve stem 2 extends out of the upper shaft hole, and a support sleeve is also provided between the valve stem 2 and the upper shaft hole.

[0069] Exemplarily, a gland 9 is also provided on the upper shaft hole. The gland 9 is arranged on the upper shaft hole through screws. The valve stem extends out from the center of the gland. Sealing rings are provided between the gland 9 and both the valve stem and the valve body.

[0070] Further, when assembling the new rubber-lined butterfly valve, the following steps are carried out:

[0071] Prepare all components and check their appearance, quality and dimensions;

[0072] a. Install the valve seat 4, align the valve stem hole of the valve seat 4 with the upper shaft hole of the valve body, and squeeze the valve seat 4 into the valve body 1;

[0073] b. Before assembly, check whether the fit between the bearing and the valve stem 2 is too loose or too tight. After checking without problems, install the bearings into the upper shaft hole and the lower shaft hole in the valve body 1 respectively;

[0074] c. Install the valve plate 4, the valve stem 2 and the split ring 8. The split ring 8 is snapped into the annular groove of the valve stem 2. The valve stem 2 passes through the valve plate 3 from the lower shaft hole of the valve body 1 until the end face of the split ring 8 fits against the lower shaft hole of the valve body 1. Before assembly, it is necessary to check whether the split ring 8 can rotate in the annular groove of the valve stem 2 and confirm the direction of the valve plate 3.

[0075] d. Adjust the positions of the valve stem 2 and the valve plate 3 so that the conical pin holes on the valve stem 2 and the valve plate 3 are aligned, and install the conical pin.

[0076] e. Install the parts of the lower shaft hole, and sequentially install the adjusting steel ball 7, the end cover 5, and the sealing ring. The end cover 5 is arranged on the valve body 1 through bolts. An elastic gasket is also provided between the bolts for installing the end cover 5 and the valve body 1. Turn the bolts, but do not tighten them completely. Install the adjusting screw 6, the sealing ring and the elastic gasket in the screw holes of the end cover 5 in sequence. Rotate the valve stem 2. After adjusting the position of the valve plate 3 to be centered, pre-tighten the adjusting screw 6, and at the same time check whether the valve stem 2 moves smoothly. After it is smooth, tighten the bolts on the end cover 5 again.

[0077] f. Install the support sleeve and the gland 9 in the upper shaft hole in sequence. Sealing rings are respectively arranged on the contact surfaces between the gland 9 and the valve body 1 and the valve stem 2, and then fix the gland 9 on the valve body 1 through bolts and elastic gaskets.

[0078] Spot welding is performed at the connection between the conical pin and the valve plate 3 to complete the valve body assembly.

[0079] In summary, the new rubber-lined butterfly valve of the utility model is designed with a curved surface and adjustment teeth on the valve plate. By optimizing the fluid channel, achieving fine adjustment, reducing fluid impact and vibration, reducing driving torque and improving sealing performance, etc., the precise pressure and flow regulation of the water cooling system pipeline or fluid delivery pipeline is achieved, and the goals of no impact, no dead zone, low torque, high control ratio and tight sealing performance are achieved. This design can improve system efficiency, reduce energy consumption and extend equipment life.

[0080] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A new type of rubber lined butterfly valve, characterized in that: include: A valve body, wherein a valve stem is provided in the valve body; A valve plate, wherein the valve plate is disposed in the valve body through a valve stem, and the valve plate and the valve stem are connected through a conical pin; A plurality of adjusting teeth are respectively arranged on both sides of the valve plate, and the adjusting teeth on one side and the other side of the valve plate are far away from each other.

2. According to claim 1, the new type of rubber lined butterfly valve is characterized by: The adjusting tooth is in a prism shape, the large end of the adjusting tooth is connected to the valve plate, and the adjusting tooth is arranged close to the edge of the valve plate.

3. According to claim 2, the new type of rubber lined butterfly valve is characterized by: The adjusting teeth on the same side are arranged at equal distances.

4. According to claim 3, the new type of rubber lined butterfly valve is characterized by: The sealing surface of the valve plate is in the form of a cosine wave or a spherical surface.

5. According to claim 4, the new type of rubber lined butterfly valve is characterized by: A plurality of positioning bosses are arranged on the back side of the valve plate, and the positioning bosses are distributed on both axial sides of the valve stem hole of the valve plate.

6. According to claim 5, the new type of rubber lined butterfly valve is characterized by: A plurality of assembly platforms are also arranged on the back side of the valve plate.

7. A new type of rubber lined butterfly valve according to claim 6, characterized in that: A valve seat is also provided in the valve body. The sealing surface of the valve seat is a cosine wave or a spherical surface, and forms a torsional seal with the sealing surface of the valve plate.

8. According to claim 7, the new type of rubber lined butterfly valve is characterized by: The valve body comprises an upper shaft hole and a lower shaft hole, both of which are connected to the inner cavity of the valve body, one end of the valve stem is located in the lower shaft hole, and the other end of the valve stem extends out from the upper shaft hole, and the end surface of the valve stem located in the lower shaft hole is provided with a tapered groove, and the opening of the lower shaft hole is also provided with an end cover, and the end cover is arranged on the valve body by bolts, and the center of the end cover is also provided with a screw hole, and an adjusting screw is installed on the screw hole, and the end surface of the extending end of the adjusting screw is provided with a groove, and the groove is arranged opposite to the tapered groove, and an adjusting steel ball is provided between the groove and the tapered groove, and the adjusting steel ball is clamped by the groove and the tapered groove.

9. A new type of rubber lined butterfly valve according to claim 8, characterized in that: A bearing is also provided between the valve stem and the valve body.

10. A new type of rubber lined butterfly valve according to claim 9, characterized in that: An annular groove is also arranged on the outer side of the end portion of the valve stem located in the mounting hole, and a split ring is clamped in the annular groove.

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