Valve and method of installing same

Abstract

The application discloses a valve and a mounting method thereof. The valve comprises a valve body, an inlet and an outlet arranged on the valve body, and a valve disc arranged in the valve body. The valve further comprises a fastener arranged in the valve body and fixed on the valve disc or the valve body. The fastener comprises a base and a protruding part. The protruding part is formed by protruding radially from the surface of the base to the fastener. The base and the protruding part form a clamping area. The clamping area is a non-rotational body. A flow guide part is arranged on the outer side of the fastener. The flow guide part has an outer wall formed around the central axis of the fastener. When the valve disc is in an open position, at least part of the outer wall of the flow guide part and at least part of the inner wall of the valve body form a flow guide channel. The flow guide channel connects the inlet and the outlet. The outer wall of the flow guide part produces a flow guide effect on the fluid, so that the fluid in the flow guide channel is not affected by the protruding part. Therefore, the valve has a relatively stable flow output when the fastener is in different mounting positions.

Description

Technical Field

[0001] This invention relates to a valve and its installation method. Background Technology

[0002] A valve consists of a valve body and a valve disc. The valve disc moves within the valve body to control the valve's opening or adjust its degree. Some valves also use fasteners to secure certain parts, such as using a fastening nut to fix the sealing ring to the valve disc.

[0003] Valves are commonly used to control the flow parameters of fluid media (such as pressure, flow rate, and velocity). In some fields, especially semiconductors or other fields that require precise control, the ability of valves to allow the flow of media is one of the important performance indicators that need to be considered in the design and control of fluid systems.

[0004] Many factors influence a valve's ability to handle media flow, such as the size and shape of the media flow channel, and even the surface roughness of the channel. These factors all affect the valve's actual flow capacity. In existing technology, even valves of the same specification and batch can have different flow capacities. Therefore, reducing flow output fluctuations between different valves is a pressing technical problem that needs to be solved in this field. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the flow output of different valves fluctuates greatly due to different fastener installation angles, and to provide a valve and its installation method.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution: a valve, comprising a valve body, an inlet and an outlet disposed on the valve body, and a valve disc located inside the valve body; the valve further comprising a fastener located inside the valve body and fixed to the valve disc or the valve body; the fastener comprising:

[0007] The base is a rotating body, and the axis of rotation of the base is parallel to the mounting direction of the fastener relative to the valve disc or the valve body, and the axis of rotation of the base is defined as the central axis.

[0008] A protrusion is formed by the surface of the base protruding radially toward the fastener, the base and the protrusion forming a clamping area, the clamping area being a non-rotating body relative to the central axis;

[0009] A flow guide is provided on the outer side of the fastener. The flow guide has an outer wall formed around the central axis. When the valve disc is in the open position, a flow guide channel is formed between at least a portion of the outer wall of the flow guide and at least a portion of the inner wall of the valve body. The flow guide channel connects the inlet and the outlet.

[0010] In this design, a clamping area consisting of a base and a protrusion is provided. During fastener installation, the protrusion allows for the application of a torque that causes the fastener to rotate around its central axis, facilitating clamping during installation. This, in turn, secures the fastener to the seal or other components within the valve body, such as springs. After the fastener is fixed to the valve disc or valve body, different installation positions result in different angles between the protrusion and the valve outlet. However, at any angle, the guide section has an outer wall that encircles the central axis, which guides the fluid, ensuring that the fluid in the guide channel is unaffected by the protrusion. This reduces the protrusion's influence on fluid flow, resulting in a relatively stable flow output for the fastener in different installation positions. This addresses the issue of large flow output fluctuations in different valves.

[0011] Preferably, the outer surface of the fastener has an inwardly recessed groove that forms the flow guide.

[0012] In this solution, by setting grooves, a larger flow channel can be provided. At the same time, grooves of different sizes can be set according to the actual flow requirements. That is, the setting of grooves can solve the defect of large flow output fluctuations of different valves, while increasing the valve flow to a certain extent.

[0013] Preferably, the groove wall is curved.

[0014] In this design, the curved grooves on the structure facilitate fluid flow and improve fluid flow capacity.

[0015] Preferably, the clamping area is located at both ends of the groove.

[0016] In this solution, compared to placing the flow guide at the end of the fastener, the fastener with the groove can be clamped on both sides of the outer surface during assembly. This structure allows both ends of the groove to be clamped simultaneously, ensuring the clamping effect while achieving flow guidance, avoiding deformation due to excessive force on one end, and also improving the stability of the clamping to prevent detachment.

[0017] Preferably, the clamping area has a prism-shaped outer surface.

[0018] In this design, the prism-shaped fastener experiences more uniform force when it engages with the tool, resulting in a more rational structure.

[0019] Preferably, the flow guide is located at at least one end of the fastener, and the clamping area is located downstream of the flow guide for the direction of medium flow within the valve.

[0020] In this design, the flow guide is located at one end of the fastener, meaning the shortest path for the medium to flow out of the valve body is through the flow guide channel and directly out of the valve body. Since the shortest path does not pass through the clamping area, this design can further reduce the impact of the protrusion in the clamping area on the flow rate, thereby further reducing the flow output fluctuation of different valves.

[0021] Preferably, the valve includes a cavity space enclosed by the inner wall of the valve body, the cavity space further includes a flow guiding space, the cavity space in the region between the outlet and the inlet forms the flow guiding space, and when the valve disc is in the open position, the volume formed by the fasteners surrounding the flow guiding space accounts for more than 30% of the volume of the flow guiding space;

[0022] Preferably, when the valve disc is in the open position, the volume formed by the fastener surrounding the flow guide space accounts for more than 70% of the volume of the flow guide space.

[0023] In this solution, the size of the fastener needs to be set according to the specific structure of the valve. However, the larger the proportion of the volume formed by the fastener to the flow guiding space, the greater the impact of the protrusion on the fluid flow at different angles, and the greater the fluctuation of the flow output of different valves. The flow guiding effect of the outer wall of the flow guiding part can reduce the impact of the protrusion on the fluid flow, thereby making the flow output of the fastener more stable at different angles and reducing the impact of the increase in the volume of the fastener (increase in the proportion of the flow guiding space) on the fluctuation of the flow output.

[0024] Preferably, the fastener is fixed to the valve disc, and the clamping area forms a clearance fit with the inner wall of the valve body.

[0025] In this design, the clearance fit facilitates valve disc assembly and provides guidance during assembly, improving installation accuracy.

[0026] Preferably, the valve includes an elastic diaphragm disposed within the valve body, the elastic diaphragm and the inner wall of the valve body surrounding each other to form a diaphragm chamber, the inlet and the outlet communicating through the diaphragm chamber, and the valve disc disposed within the diaphragm chamber;

[0027] The valve also includes a valve stem that is linked to the control mechanism. The valve stem is located outside the diaphragm chamber and abuts against the valve disc through the elastic diaphragm.

[0028] In this design, an elastic diaphragm is used to prevent leakage from the gap between the valve stem and the valve body during the opening and closing process. In addition, since the valve disc and valve stem are not rigidly connected, the guiding effect of the clamping area allows the valve disc to move along a preset path during each opening and closing, thus improving the stability of the valve.

[0029] Preferably, when the valve disc is in the open position, the outlet is located at the flow guide channel.

[0030] In this design, when the valve disc is opened, the fluid enters the guide channel from the inlet and flows directly out through the outlet, resulting in better flow guidance.

[0031] The present invention also discloses an assembly method for the above-mentioned valve, which includes the following steps: applying a force to the clamping area to restrict the fastener; and installing the fastener on the valve disc or the valve body.

[0032] In this solution, by assembling through this step, there is no need to impose special restrictions on the angle of the fasteners before installation during mass production or subsequent maintenance, and a relatively uniform and stable flow rate can be obtained, with small fluctuations in the flow output of different valves.

[0033] The positive and progressive effects of this invention are as follows: A clamping area composed of a base and a protrusion is provided. During fastener installation, the protrusion allows for the application of a torque to rotate the fastener around its central axis, facilitating clamping during installation and securing the fastener to the seal or other components such as springs within the valve body. After the fastener is fixed to the valve disc or valve body, different installation positions result in different angles between the protrusion and the valve outlet. However, at any angle, the guide portion has an outer wall formed around the central axis, which guides the fluid, ensuring that the fluid in the guide channel is unaffected by the protrusion. This reduces the protrusion's influence on fluid flow, resulting in a relatively stable flow output for the fastener in different installation positions, thus solving the problem of large flow output fluctuations in different valves. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the fastener structure of Embodiment 1 of the present invention.

[0035] Figure 2 for Figure 1 Top view.

[0036] Figure 3 This is a schematic diagram of the valve structure in Embodiment 1 of the present invention.

[0037] Figure 4This is a partial structural diagram of the valve in Embodiment 1 of the present invention.

[0038] Figure 5 This is a schematic diagram of the structure of the fastener after installation, where the angle between the protrusion and the outlet is 0°.

[0039] Figure 6 This is a schematic diagram of the structure of the fastener after installation, where the protrusion and the outlet have an angle of 15°.

[0040] Figure 7 This is a schematic diagram of the structure of the fastener after installation, where the protrusion and the outlet have an angle of 30°.

[0041] Figure 8 This is a schematic diagram of the fastener structure of Embodiment 2 of the present invention.

[0042] Figure 9 for Figure 8 A bottom view.

[0043] Figure 10 This is a schematic diagram of the fastener structure of Embodiment 3 of the present invention.

[0044] Figure 11 This is a partial structural diagram of the valve in Embodiment 3 of the present invention.

[0045] Explanation of reference numerals in the attached figures

[0046] Fastener 1

[0047] Clamping Zone 11

[0048] Base 111

[0049] Protrusion 112

[0050] Guide section 12

[0051] Groove 121

[0052] Cylindrical part 122

[0053] outer wall 123

[0054] Valve body 21

[0055] Spring 22

[0056] Seal 23

[0057] Valve body 24

[0058] Inner wall 241

[0059] First Channel 25

[0060] Imported 251

[0061] Second Channel 26

[0062] Exports 261

[0063] Valve disc 3

[0064] Elastic diaphragm 4

[0065] Valve stem 5

[0066] Control mechanism 6 Detailed Implementation

[0067] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0068] Example 1

[0069] like Figures 1-7 As shown, this embodiment discloses a valve, which includes a valve body 24, an inlet 251 and an outlet 261 disposed on the valve body 24, and a valve disc 3 located inside the valve body 24. The valve also includes a fastener 1, which is located inside the valve body 24 and fixed to the valve disc 3. The fastener 1 includes: a base 111, which is a rotating body, and the rotation axis of the base 111 is parallel to the mounting direction of the fastener 1 relative to the valve disc 3. The rotation axis of the base 111 is defined as the central axis; and a protrusion 112, which is formed by the base 111. The surface of part 111 protrudes radially toward the fastener 1. The base 111 and the protrusion 112 form a clamping area 11, which is a non-rotating body relative to the central axis. The guide part 12 is formed on the outer side of the fastener 1. The guide part 12 has an outer wall 123 formed around the central axis as the rotation axis. When the valve disc 3 is in the open position, a guide channel is formed between at least a portion of the outer wall 123 of the guide part 12 and at least a portion of the inner wall 241 of the valve body 24. The guide channel connects the inlet 251 and the outlet 261.

[0070] Specifically, in this embodiment, the fastener 1 is connected to the valve disc 3 by threads and presses the seal 23 onto the valve disc 3. Of course, in other alternative embodiments, the fastener 1 can also be threaded to the valve body 24 according to actual needs. The connection method is not limited to threaded connection, but can also be welding or other connection methods. As long as the clamping area 11 mentioned above is provided, the fixing during the assembly process can be achieved.

[0071] Specifically, in this embodiment, the fastener 1 is used to fix the seal 23. Of course, in other alternative embodiments, the fastener 1 can also be used to fix the spring 22 inside the valve body 24, or to fix the seal 23 at the inlet 251 of the valve body 24, etc. As long as the fastener 1 is located inside the valve body 24, the technical effect of the present invention can be achieved by setting the above-mentioned guide portion 12.

[0072] Specifically, such as Figure 2 As shown, in this embodiment, the central axis of fastener 1 refers to the center line of the internal threaded hole on fastener 1. The base 111 is a ring formed by rotating around the central axis, that is, the inscribed ring of fastener 1. The protrusion 112 is the edge of fastener 1. In other embodiments, depending on the actual function of fastener 1, the base 111 can be a disc, ring, groove, or other shape, and the protrusion 112 can be one or more structures protruding from the base 111. As long as the base 111 and the protrusion 112 together form a clamping area that is a non-rotating body relative to the central axis, clamping of the fastener can be achieved when installing the fastener. It should be noted that if the above-mentioned protrusion 112 structure is not provided, although an external force can be directly applied to the base 111 to achieve the clamping effect, in order to avoid slippage of fastener 1, a large force needs to be applied radially along the base 111, which can easily cause deformation of fastener 1.

[0073] Specifically, when the valve is in the closed position, the fluid does not flow inside the valve body 24. The upper end of the spring 22 abuts against the valve disc 3. The spring 22 is sleeved outside the valve disc body 21, and the lower end of the spring 22 abuts against the valve body 24. A sealing element 23 is installed at the bottom of the valve disc body 21 by fastener 1. The sealing element 23 cooperates with the inlet 251 on the valve body 24 to realize the opening and closing of the fluid medium. When the valve disc 3 is in the open position, the fluid flows from the first channel 25 through the inlet 251 into the guide channel, and then flows out through the outlet 261 into the second channel 26, thereby forming a passage.

[0074] In this embodiment, the fastener 1 is provided with a clamping area consisting of a base 111 and a protrusion 112. When installing the fastener 1, due to the setting of the protrusion 112, a torque can be applied to the fastener 1 to make it rotate around the central axis, thereby facilitating the clamping of the fastener 1 during the installation process, and thus fixing the fastener 1 to the seal 23 or the spring 22 in the valve body 24. After the fastener 1 is fixed on the valve disc 3 or the valve body 24, different installation positions will cause the protrusion 112 to form different angles with the valve outlet 261. However, at any angle, since the guide part 12 has an outer wall 123 formed around the central axis, the outer wall 123 of the guide part 12 has a guiding effect on the fluid, so that the fluid in the guide channel is not affected by the protrusion 112, thereby reducing the influence of the protrusion 112 on the fluid flow, so that the fastener 1 has a relatively stable flow output in different installation positions, thereby solving the defect of large flow output fluctuations in different valves.

[0075] like Figure 1As shown, in this embodiment, the outer surface of the fastener 1 has an inwardly recessed groove 121, which forms a flow guide 12. By providing the groove 121, a larger flow guide channel can be provided. Furthermore, different sizes of grooves 121 can be provided according to actual flow requirements. That is, the groove 121 can address the issue of large fluctuations in flow output from different valves while simultaneously increasing the valve's flow rate to some extent. Of course, in other alternative embodiments, the flow guide 12 can also be a structure formed by the outer surface of the fastener 1 protruding outwards. However, the size of the flow guide 12 cannot be arbitrarily set; it must be able to form a flow guide channel with the inner wall of the valve body 24, otherwise, its flow guide effect will be affected.

[0076] like Figure 1 As shown, the groove wall of groove 121 is curved. The curved surface of groove 121 facilitates fluid flow and improves fluid flow capacity. Specifically, in this embodiment, the cross-section of groove 121 along the central axis is arc-shaped. Of course, in other alternative embodiments, the groove wall of groove 121 can also be planar.

[0077] like Figure 1 As shown, clamping areas 11 are located at both ends of the groove 121. That is, protrusions 112 are located at both ends of the groove 121. This structure allows both ends of the groove 121 to be clamped simultaneously, ensuring a good clamping effect during assembly, and also providing good flow guidance and a more rational structure. Compared to having the flow guide 12 located at the end of the fastener 1, the fastener 1 with the groove 121 allows both outer surfaces of the groove 121 to be clamped during assembly. This structure allows both ends of the groove 121 to be clamped simultaneously, ensuring a good clamping effect while providing flow guidance, preventing deformation due to excessive force on one end, and improving clamping stability to prevent detachment. Of course, in other alternative embodiments, the clamping area 11 may only be located at one end of the groove 121.

[0078] like Figure 1 and Figure 2 As shown, the clamping area 11 has a prism-shaped outer surface. The prism-shaped fastener 1 experiences more even force when engaging with the tool, resulting in a more rational structure. Specifically, in this embodiment, the fastener 1 is a hexagonal nut, and the clamping area 11 has a hexagonal prism-shaped outer surface. Of course, in other alternative embodiments, the clamping area 11 can also be a curved outer surface. As long as the clamping area 11 is a non-rotating body relative to the central axis, the technical effect of easy clamping can be achieved.

[0079] like Figure 3 and Figure 4As shown, the valve includes a cavity space enclosed by the inner wall 241 of the valve body 24. The cavity space also includes a flow guiding space. The cavity space between the outlet 261 and the inlet 251 forms the flow guiding space. When the valve disc 3 is in the open position, the volume formed by the fasteners 1 in the flow guiding space accounts for more than 30% of the volume of the flow guiding space.

[0080] In other preferred embodiments, when the valve disc is in the open position, the volume formed by the fasteners 1 surrounding the flow guide space accounts for more than 70% of the volume of the flow guide space.

[0081] The size of fastener 1 needs to be set according to the specific structure of the valve. For example, when fastener 1 and valve body 24 or valve disc 3 are connected by threads, when the fastening force is high, the size of clamping area 11 needs to be set larger to avoid excessive local stress during assembly. Or, when fastener 1 and valve body 24 or valve disc 3 are connected by welding, the size of fastener 1 should be selected according to the actual welding process. It is necessary to ensure the fixation of fastener 1 before welding and reduce the heat damage caused by welding. The larger the size of fastener 1, the lower the requirement for machining accuracy. However, the larger the proportion of the volume formed by fastener 1 to the flow guiding space, the greater the influence of protrusion 112 on fluid flow at different angles, and the larger the flow output fluctuation of different valves. The flow guiding effect of the outer wall 123 of the flow guiding part 12 can reduce the influence of protrusion 112 on fluid flow, thereby making the flow output of fastener 1 more stable at different angles and reducing the impact of the increase in the volume of fastener 1 (increase in the proportion of the flow guiding space) on the flow output fluctuation. Of course, in other alternative embodiments, the volume formed by the fastener 1 surrounding the flow guide space may be less than 30% of the volume of the flow guide space. In this case, since the volume of the fastener 1 is small, the protrusion 112 itself has little impact on the flow output fluctuation of the fluid.

[0082] Specifically, the flow guiding space is the cavity space between the plane at the inlet 251 and the highest plane at the outlet 261. When the medium flows into the cavity space from the inlet 251, the shortest path to the outlet 261 is located in the flow guiding space. The shape of this part of the space has a significant impact on the flow of the medium. Although the area inside the cavity space but outside the flow guiding space also has a certain impact on the flow of the medium, such as the top of the valve disc 3 in this embodiment, since this part of the area is far from the shortest path of the medium in the cavity space, it has little impact on the overall flow capacity of the valve. In order to ensure the fastening effect of the fastener 1 and reduce the fluctuation of the flow output, the inventors have made painstaking efforts in the experiment. The results show that when the valve disc is in the open position, when the volume formed by the fastener 1 in the flow guiding space accounts for more than 30% of the volume of the flow guiding space, the angle of the protrusion 112 of the fastener 1 begins to have a significant impact on the output flow of the valve. When this volume accounts for more than 70%, the impact of the angle of the protrusion 112 on the output flow of the valve further increases. It should be noted that in some embodiments, even if the volume ratio is very small, if the protrusion 112 significantly affects the path of the medium flowing through the cavity space, this solution can still achieve a good effect of stabilizing the flow rate.

[0083] Specifically, in this embodiment, the clamping area 11 forms a clearance fit with the inner wall 241 of the valve body 24. The clearance fit facilitates the assembly of the valve disc 3, and during assembly, the clamping area 11 of the fastener 1 and the inner wall 241 of the valve body 24 can be used for guidance, thereby improving the installation accuracy of the valve disc.

[0084] like Figure 3 and Figure 4 As shown, the valve includes an elastic diaphragm 4 disposed within the valve body 24. The elastic diaphragm 4 and the inner wall 241 of the valve body 24 surround each other to form a diaphragm chamber. The inlet 251 and the outlet 261 are connected through the diaphragm chamber. The valve disc 3 is disposed within the diaphragm chamber. The valve also includes a valve stem 5 that is linked to the control mechanism 6. The valve stem 5 is disposed outside the diaphragm chamber and abuts against the valve disc 3 through the elastic diaphragm 4.

[0085] Specifically, in this embodiment, the control mechanism 6 is a handwheel, which drives the valve stem 5 to rotate to control the opening and closing of the valve. The valve stem 5 and the valve body 24 are connected by a thread, and the valve stem 5 can move up and down by rotating. Of course, the control mechanism 6 can also drive the valve stem 5 by controlling a motor through a controller.

[0086] By setting an elastic diaphragm 4, leakage is prevented from occurring in the valve during opening and closing due to the gap between the valve stem 5 and the valve body 24. In addition, since the valve disc 3 and the valve stem 5 are not rigidly connected, the guiding effect of the clamping area 11 allows the valve disc 3 to move on a preset path during each opening and closing, thereby improving the stability of the valve.

[0087] Specifically, in this embodiment, when the valve disc 3 is in the open position, the outlet 261 is located at the flow guide channel. When the valve disc 3 is open, the fluid enters the flow guide channel from the inlet 251 and can flow out directly through the outlet 261, resulting in better flow guidance effect of the flow guide 12. Of course, in other alternative embodiments, the outlet 261 can also be located above the flow guide channel.

[0088] This embodiment also discloses an assembly method for the above-mentioned valve, which includes the following steps: applying a force to the clamping area 11 to restrict the fastener 1; and installing the fastener 1 on the valve disc 3 or inside the valve body 24.

[0089] In this embodiment, the fastener 1 is assembled into the valve body 24 by using a tool to clamp the clamping area 11 of the fastener 1. Of course, in other alternative embodiments, tools may not be used, and the clamping can be done manually. By assembling through this step, in mass production or subsequent maintenance, there is no need to specially restrict the angle of the fastener 1 before installation, and a relatively uniform and stable flow rate can be obtained, with less fluctuation in the flow output of different valves.

[0090] The technical effects of this embodiment will be verified below. The flow capacity of a valve to fluid media is usually represented by the Cv value (Circulation Volume). Finite element software is used to numerically simulate the flow of media in fasteners of different sizes.

[0091] The specific dimensional parameters of fastener 1 are shown in Table 1, where D is the maximum distance between the centers of groove 121 and R is the radius of groove 121. Simulations were performed on the medium flow conditions of multiple fasteners 1 with different groove 121 dimensions located at different angles, such as... Figures 5-7 As shown, in the numerical simulation, the angle between the protrusion 112 of the fastener 1 and the valve outlet 261 was controlled to obtain the results shown in Table 2.

[0092] Table 1. Groove Dimensions of Fasteners

[0093]

[0094] Table 2 shows the Cv values ​​of valves corresponding to grooves with different dimensions and parameters on fasteners.

[0095]

[0096]

[0097] Wherein, the relative position is the angle between the protrusion 112 and the valve outlet 261, and Cv is the flow coefficient, which characterizes the flow capacity of the valve, and the calculation formula is as follows:

[0098] Cv = 1.156 × KV ,

[0099] In the formula, Q represents the measured water flow rate, expressed in cubic meters per hour (m³ / h). 3 / h); Δp V ρ is the net differential pressure of the valve, in kilopascals (kPa); ρ is the density of water, in kilograms per cubic meter (kg / m³). 3 ); ρ0 is the density of water at -15℃, in kilograms per cubic meter (kg / m³). 3 ), where the ratio of ρ / ρ0 for water at room temperature is taken as 1. Δp in the formula... V Q is obtained through numerical simulation using finite element software, thereby calculating the Cv value of valves of different sizes located at different relative positions.

[0100] Refer to Tables 1 and 2 and Figures 5-7 In this embodiment, compared with the fastener 1 without groove 121, even if the installation position of the protrusion 112 of the fastener 1 relative to the valve outlet 261 is different, the valve corresponding to the fastener 1 with groove 121 has a relatively stable flow coefficient. Although the change of the size parameter of groove 121 will cause the flow coefficient to change, the difference of flow coefficient under different installation positions is greatly reduced compared with the fastener 1 without groove 121, that is, the flow output fluctuation is reduced.

[0101] Example 2

[0102] The clamping area 11 and the guide portion 12 in this embodiment are largely the same as those in Embodiment 1. The differences will now be explained.

[0103] like Figure 8 and Figure 9 As shown, in this embodiment, the flow guiding part 12 is distributed at one end of the fastener 1, and the clamping area 11 is distributed at the other end. The flow guiding part 12 includes two parts, namely the groove 121 and the cylindrical part 122. Both the groove 121 and the cylindrical part 122 have an outer wall 123 formed around the central axis of the fastener 1. Both can guide the fluid, so that the fluid at the flow guiding channel is not affected by the protrusion 112, thereby reducing the influence of the protrusion 112 on the fluid flow, so that the fastener 1 has a relatively stable flow output in different installation positions.

[0104] Example 3

[0105] The clamping area and the guide section of this embodiment are largely the same as those of Embodiment 1. The differences will now be explained.

[0106] like Figure 10 and Figure 11As shown, the flow guide 12 is distributed at one end of the fastener 1, and for the medium inside the valve, the clamping area 11 is located downstream of the flow guide 12. The flow guide 12 is located at one end of the fastener 1, meaning the shortest path for the medium to flow out of the valve body 24 is: directly flowing out of the valve body 24 through the flow guide channel. Since the shortest path does not pass through the clamping area 11, this arrangement further reduces the impact of the protrusion 112 of the clamping area 11 on the flow rate, thereby further reducing the flow output fluctuations of different valves.

[0107] Specifically, in this embodiment, the flow guide 12 is located at the end of the fastener 1 near the inlet 251. In other alternative embodiments, the flow guide 12 can also be located at the end of the fastener 1 away from the inlet 251. Of course, the flow guide 12 can also be located at both ends of the fastener 1. In other embodiments, due to different structural designs, the shortest path of the medium flowing out of the valve body 24 may inevitably pass through part of the clamping area 11. However, as long as the flow guide 12 is located at the end of the fastener 1 and the clamping area 11 is located downstream of the flow guide 12, the impact of the protrusion 112 of the clamping area 11 on the flow rate can be minimized while achieving the clamping function.

[0108] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A valve comprising a valve body, an inlet and an outlet disposed on the valve body, and a valve disc located inside the valve body, characterized in that, The valve further includes fasteners located within the valve body and fixed to the valve disc or the valve body. The fasteners include: The base is a rotating body, and the axis of rotation of the base is parallel to the mounting direction of the fastener relative to the valve disc or the valve body, and the axis of rotation of the base is defined as the central axis. A protrusion is formed by the surface of the base protruding radially toward the fastener, the base and the protrusion forming a clamping area, the clamping area being a non-rotating body relative to the central axis; A flow guide is provided on the outer side of the fastener. The flow guide has an outer wall formed around the central axis. When the valve disc is in the open position, a flow guide channel is formed between at least a portion of the outer wall of the flow guide and at least a portion of the inner wall of the valve body. The flow guide channel connects the inlet and the outlet.

2. The valve as described in claim 1, characterized in that, The outer surface of the fastener has an inwardly recessed groove, which forms the flow guide.

3. The valve as described in claim 2, characterized in that, The groove wall is curved.

4. The valve as described in claim 2, characterized in that, The clamping areas are located at both ends of the groove.

5. The valve as described in claim 1, characterized in that, The clamping area has a prism-shaped outer surface.

6. The valve as described in claim 1, characterized in that, The flow guide is located at least at one end of the fastener, and the clamping area is located downstream of the flow guide for the direction of medium flow within the valve.

7. The valve as claimed in claim 1, characterized in that, The valve includes a cavity space enclosed by the inner wall of the valve body. The cavity space also includes a flow guiding space. The cavity space between the outlet and the inlet forms the flow guiding space. When the valve disc is in the open position, the volume formed by the fasteners surrounding the flow guiding space accounts for more than 30% of the volume of the flow guiding space.

8. The valve as described in claim 7, characterized in that, When the valve disc is in the open position, the volume formed by the fasteners surrounding the flow guide space accounts for more than 70% of the volume of the flow guide space.

9. The valve as claimed in claim 1, characterized in that, The fastener is fixed to the valve disc, and the clamping area forms a clearance fit with the inner wall of the valve body.

10. The valve as claimed in claim 9, characterized in that, The valve includes an elastic diaphragm disposed within the valve body, the elastic diaphragm and the inner wall of the valve body surrounding each other to form a diaphragm chamber, the inlet and the outlet are connected through the diaphragm chamber, and the valve disc is disposed within the diaphragm chamber; The valve also includes a valve stem that is linked to the control mechanism. The valve stem is located outside the diaphragm chamber and abuts against the valve disc through the elastic diaphragm.

11. The valve according to any one of claims 1-10, characterized in that, When the valve disc is in the open position, the outlet is located at the flow guide channel.

12. A method for assembling a valve as described in any one of claims 1-11, characterized in that, It includes the following steps: A force is applied to the clamping area to restrain the fastener; The fastener is installed on the valve disc or in the valve body.

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