Valve body

Abstract

The utility model discloses a valve body, which comprises a valve main body, a valve core and a valve core, the valve cavity is communicated with the second flow channel; the valve seat comprises a protruding wall and a communicating flow channel, the communicating flow channel is used for communicating the valve cavity and the first flow channel, and the valve cavity is provided with an annular bottom wall surrounding the valve seat; a valve assembly; the vertical face passing through the central axis of the second flow channel serves as a datum plane, and the annular bottom wall is asymmetrically arranged relative to the datum plane. According to the utility model, the annular bottom wall is arranged into a structure which is asymmetric about the reference surface, so that the pressure balance in the valve cavity is destroyed, and the fluid pressure in the valve cavity, corresponding to the reference surface and the two sides of the reference surface, is unbalanced; the pressure difference generated by unbalanced pressure in the valve cavity can push the fluid to rapidly flow in the valve cavity, the fluid is prevented from slowly flowing at the two ends, away from and close to the second flow channel, of the annular bottom wall to form a flowing dead zone, and then the situation that impurity deposition of the fluid in the flowing dead zone causes pollution to follow-up fluid is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of valves, and particularly relates to a valve body. Background Art

[0002] As a part of the pipeline system, the valve body drives the valve core inside the valve body to change the state of the fluid in the valve body. For example, a conventional globe valve realizes the on-off control of the flow path through the cooperation between the valve core and the valve seat, or changes the flow rate by changing the opening degree of the valve seat.

[0003] In the existing valve bodies, generally, a diaphragm valve disclosed in Patent 202321710039.3 is referred to. Figure 10 , which includes a valve main body 1, an upper housing 2 connected to the upper end of the valve main body 1, and a valve assembly 3; the valve main body 1 has an inlet flow path 11, an outlet flow path 12, and a valve port 13 for fluid to flow through, and the valve port 13 connects the inlet flow path 11 and the outlet flow path 12. It is found in use that in the valve cavity, impurity accumulation or crystal sedimentation accumulation is likely to occur in two regions, P1 and P2, which will affect the cleanliness or concentration of the fluid, etc.; as Figure 11 and Figure 12 shown, further analyzing the valve body in Figure 10 , it is found that the fluid flow velocity at the bottom wall of the valve cavity in the two regions of P1 and P2 is slow, so flow dead zones are formed in these two regions, resulting in the accumulation of impurities or crystals in these two regions after long-term use, and further affecting the cleanliness or concentration of the fluid. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a valve body to solve the problem of impurity or crystal accumulation at one end of the bottom wall of the valve cavity close to the liquid outlet flow path and at one end far from the liquid outlet flow path.

[0005] To solve the above technical problem, the utility model adopts the following technical scheme: A valve body includes: a valve main body having a first flow path and a second flow path for fluid inlet and outlet; a valve cavity provided inside the valve main body, the valve cavity communicating with the second flow path; a valve seat provided in the valve cavity and including a protruding wall and a communicating flow path inside the protruding wall, the communicating flow path being used to communicate the valve cavity with the first flow path, the valve cavity having an annular bottom wall surrounding the outside of the valve seat; a valve assembly installed on the valve main body and extending into the valve cavity to cooperate with the valve seat to open and close the valve body; taking the vertical plane passing through the central axis of the second flow path as the reference plane, the annular bottom wall is asymmetrically arranged with respect to the reference plane.

[0006] The technical scheme has the following technical effects:

[0007] The utility model optimizes the state of the fluid at the annular bottom wall by setting the annular bottom wall asymmetrically with respect to the reference plane, and ensures that the flow speed of the fluid at various locations is relatively fast without forming a dead angle. Specifically, the pressure of the fluid flowing through the annular bottom wall on both sides of the reference plane is unbalanced, because the flow direction at the middle position in the valve cavity coincides with the reference plane. When the annular bottom wall inside the valve cavity is symmetrical with respect to the reference plane, the fluid pressure near the reference plane of the valve cavity is balanced or close, so the liquid flows slowly or almost does not flow in the area corresponding to the annular bottom wall and the reference plane, resulting in a flow dead zone in the area. Therefore, the annular bottom wall is set to a structure asymmetrical with respect to the reference plane, destroying the pressure balance in the valve cavity, so that the fluid pressure in the valve cavity and the reference plane and the corresponding positions on both sides thereof are unbalanced. When the fluid flows in the valve cavity, the pressure difference generated by the pressure imbalance in the valve cavity can promote the fluid to flow quickly in the valve cavity, avoiding the fluid from flowing slowly at both ends of the annular bottom wall away from and close to the second flow channel to form a flow dead zone, thereby avoiding the deposition of impurities in the flow dead zone and causing contamination to the subsequent fluid.

[0008] In the above-mentioned valve body, two planes symmetrical about the reference plane and coincident with the central axis of the valve cavity are set as cross sections, and the annular bottom wall has a first part and a second part located between the two cross sections and penetrated by the reference plane, the first part is the part away from the second flow channel, and the second part is the part close to the second flow channel; wherein the first part is asymmetrically arranged about the reference plane, and / or the second part is asymmetrically arranged about the reference plane. This is mainly due to the current symmetrical valve body structure, the annular bottom wall mainly forms a flow dead zone at the second part close to the second flow channel and the first part away from the second flow channel, at this time, the first part and / or the second part are not symmetrical about the reference plane, so that the pressure of the fluid is unbalanced when flowing through the annular bottom wall on both sides of the reference plane, thereby ensuring that the fluid flows smoothly in the first part and the second part, thereby avoiding the formation of a flow dead zone on the annular bottom wall and the deposition of impurities.

[0009] In the above-mentioned valve body, the annular bottom wall is inclined and has a highest point and a lowest point, the highest point is located in the first part, and the lowest point is located in the second part; wherein, the highest point is located on one side of the reference plane, and / or the lowest point is located on one side of the reference plane. When the fluid enters the valve cavity, the fluid at the highest point will flow along the two guide walls to the second flow channel under the action of gravity, and the guiding effect is good. Because the highest point and / or the lowest point are located on one side of the reference plane, when the fluid flows along the guide wall, the fluid pressure on both sides of the reference plane is unbalanced. When the fluid flows to the lowest point, the fluid flow rate on the two guide walls is different, which can avoid the formation of a flow dead zone at the lowest point of the annular bottom wall.

[0010] In the above-mentioned valve body, the second part has a sunken wall, and a drainage groove is formed by the sunken wall. The drainage groove is communicated with the second flow channel and is located on one side of the reference plane or is divided by the reference plane and is asymmetric with respect to the reference plane. The drainage groove can prevent the existence of a pressure balance area on the annular bottom wall and form a flow dead zone on the annular bottom wall, thereby avoiding the deposition of impurities in the flow dead zone of the fluid and polluting the subsequent fluid.

[0011] In the above-mentioned valve body, a water inlet for communicating with the valve cavity is provided at one end of the second flow channel facing the valve seat, and the vertical plane perpendicular to the reference plane is used as the projection plane; in the projection, the lowest projection is entirely located directly below the projection of the water inlet; or, the lowest projection coincides with the projection of the water inlet; or, the lowest projection has a part that coincides with the projection of the water inlet, and both sides of the lowest projection are located directly below the projection of the water inlet. By fully or partially aligning the lowest point of the annular bottom wall with the water inlet, it is avoided that the lowest point deviates from below the water inlet, and the large horizontal distance or height difference between the lowest point and the bottom end of the water inlet causes a dead zone to be formed at the lowest point during liquid flow.

[0012] In the above-mentioned valve body, the highest point is the peak point, and the lowest point is the bottom point. The vertical plane passing through the peak point and the bottom point is located on one side of the central axis of the valve cavity. Because when the vertical plane passing through the peak point and the bottom point coincides with the central axis of the valve cavity, if the deviation angle of the peak point from the reference plane is too large, the bottom point will also deviate from the reference plane by the same angle, thereby causing the bottom point to deviate from the inlet of the second flow channel, that is, the bottom point is far from the second flow channel in the horizontal direction, and the inlet of the second flow channel is higher than the bottom point, so that part of the fluid flowing to the bottom point cannot flow to the second flow channel, resulting in the deposition of impurities. Therefore, the setting that the vertical plane of the peak point and the bottom point deviates from the central axis of the valve cavity makes the deviation angle of the bottom point from the reference plane not related to the deviation angle of the peak point from the reference plane. Even if the peak point deviates from the reference plane by a large angle, the bottom point can be aligned with the second flow channel to ensure the smooth flow of the fluid at the bottom point to the second flow channel, so as to avoid the deposition of fluid impurities at the lowest point of the annular bottom wall.

[0013] In the above-mentioned valve body, the highest point is the uppermost point and the lowest point is the lowermost point. In the projection on the horizontal plane, the connecting line between the projection of the uppermost point and the projection of the central axis of the valve cavity is L1, and the projection of the central axis of the second flow channel is L2. The included angle between L1 and L2 is α, where 90° ≤ α ≤ 170°. When α is greater than 170°, the uppermost point is too close to the reference plane, and the effect of disrupting the pressure balance in the valve cavity is poor; when α is less than 90°, the length difference between the two flow guiding walls between the uppermost point and the lowermost point is large, resulting in too slow a fluid velocity on the longer flow guiding wall, causing the fluid to not pass quickly through the valve cavity, and impurities and crystallization are likely to accumulate on the longer flow guiding wall. Therefore, by setting α within the range of 90° to 170°, the included angle of the uppermost point deviating from the reference plane is restricted to ensure the user experience.

[0014] In the above-mentioned valve body, the valve seat is asymmetrically arranged with respect to the reference plane. The asymmetric valve seat can make the dimensions on both sides of the annular bottom wall and / or the fluid pressure different, thereby avoiding the existence of a region in the annular bottom wall where the fluid pressure reaches equilibrium or is similar, resulting in a liquid retention region in the region, and further causing impurities or crystallization to settle and accumulate in this region, and affecting the cleanliness or concentration of the subsequent fluid.

[0015] In the above-mentioned valve body, the connecting flow channel is symmetrically arranged with respect to the reference plane. The protruding wall has a thick wall portion and a thin wall portion located on both sides of the reference plane respectively, and makes the widths of the annular bottom wall on both sides of the reference plane different. Because the thicknesses of the thick wall portion and the thin wall portion are different, the widths of the annular bottom wall on both sides of the reference plane are different, so that when the liquid flows from the connecting flow channel to the valve cavity, more liquid will flow to the thin wall side, so that the fluid pressure on the thin wall side will be greater and the fluid pressure on the thick wall side will be relatively smaller. Thus, at this time, it is possible to avoid the occurrence of regions with fluid pressure equilibrium or similar pressure near the proximal end and the distal end of the annular bottom wall close to the second flow channel, and avoid the appearance of flow dead zones on the annular bottom wall.

[0016] In the above-mentioned valve body, when the annular bottom wall is inclined, a first section and a second section are formed between the uppermost point and the lowermost point of the annular bottom wall, and the first section is shorter than the second section; among them, the uppermost point, the thick wall portion, and the first section are all on the same side. Because the thick wall portion and the first section are arranged on the same side of the reference plane, the width of the first section is narrower, and thus the flow rate of the first section is smaller and the flow velocity is slower. In order to avoid deposition in the first section due to the slow fluid velocity, the uppermost point of the annular bottom wall is arranged on this side of the reference plane, thereby shortening the length of the first section, making the first section shorter than the second section. Under the same height difference, the length of the first section is less than that of the second section, so the slope of the first section is greater than that of the second section, that is, the first section is steeper than the second section, which can accelerate the fluid velocity on the first section and avoid the slow fluid velocity on the first section causing impurity deposition.

[0017] The features and advantages of the present invention will be disclosed in detail in the following specific implementations and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0019] Figure 1 is a cross-sectional view of the valve body in the first embodiment;

[0020] Figure 2 It is a partial three-dimensional diagram of the valve body in the first embodiment;

[0021] Figure 3 for Figure 2 A schematic section diagram with the reference plane as the section plane;

[0022] Figure 4 This is a schematic diagram of a transversely cut top view of a valve body in Example 1;

[0023] Figure 5 for Figure 2 Schematic diagram from top view;

[0024] Figure 6 It is a schematic cross-sectional view of the valve body in the first embodiment with the projection plane as the cross-sectional plane;

[0025] Figure 7 It is a top view of a part of the valve body in the second embodiment;

[0026] Figure 8 This is a partial cross-sectional schematic diagram of the valve body of Example 3;

[0027] Figure 9 It is a top view of a part of the valve body in the third embodiment;

[0028] Figure 10 It is a cross-sectional view of a valve body in the prior art;

[0029] Figure 11 It is a top view of the fluid velocity analysis of the inner wall of the valve cavity in the prior art;

[0030] Figure 12 It is a stereoscopic diagram for analyzing the fluid velocity on the inner wall of the valve body and the valve cavity in the prior art.

[0031] Reference numerals:

[0032] 100, valve body; 110, first flow channel; 120, second flow channel; 121, water outlet;

[0033] 200, valve cavity; 210, annular bottom wall; 211, highest point; 212, lowest point; 213, first section; 214, second section; 215, first part; 216, second part; 2161, drainage groove;

[0034] 300, valve seat; 310, protruding wall; 311, thick wall portion; 312, thin wall portion; 320, communication flow channel;

[0035] 400, valve assembly. Detailed implementation mode

[0036] A valve body proposed by the present utility model includes: a valve main body having a first flow channel and a second flow channel for fluid inlet and outlet; a valve cavity provided inside the valve main body, the valve cavity communicating with the second flow channel; a valve seat provided in the valve cavity and including a protruding wall and a communication flow channel inside the protruding wall, the communication flow channel being used to communicate the valve cavity with the first flow channel, the valve cavity having an annular bottom wall surrounding the outside of the valve seat; a valve assembly installed on the valve main body and extending into the valve cavity to cooperate with the valve seat to open and close the valve body; taking the vertical plane passing through the central axis of the second flow channel as the reference plane, the annular bottom wall is asymmetrically arranged with respect to the reference plane. By asymmetrically arranging the annular bottom wall with respect to the reference plane in the present utility model, the fluid pressures flowing through the annular bottom walls on both sides of the reference plane are unbalanced. Because the flow direction at the middle position in the valve cavity coincides with the reference plane, when the annular bottom wall inside the valve cavity is symmetric with respect to the reference plane, it will cause the fluid pressure near the reference plane of the valve cavity to be balanced. Therefore, a flow dead zone appears in the area corresponding to the annular bottom wall and the reference plane. Therefore, the annular bottom wall is arranged in an asymmetric structure with respect to the reference plane to break the pressure balance in the valve cavity, making the fluid pressures at the positions corresponding to the reference plane and its two sides in the valve cavity unbalanced. When the fluid flows in the valve cavity, the pressure difference generated by the unbalanced pressure in the valve cavity can push the fluid to flow rapidly in the valve cavity, avoiding the slow flow of the fluid at both ends of the annular bottom wall away from and close to the second flow channel to form a flow dead zone, and further avoiding the deposition of impurities in the flow dead zone and causing pollution to the subsequent fluid.

[0037] The technical solutions of the embodiments of the present utility model will be explained and described below with reference to the accompanying drawings of the embodiments of the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model and not all of them. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present utility model.

[0038] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more, unless otherwise clearly defined.

[0040] In the present utility model, unless otherwise clearly defined and limited, the terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0042] Embodiment 1:

[0043] A valve body, as Figures 1 to 6 shown, includes a valve main body 100 and a valve assembly 400. The valve main body 100 is provided with a first flow channel 110 and a second flow channel 120 for fluid to flow in and out. The valve main body 100 is further provided with a valve cavity 200 and a valve seat 300. The valve cavity 200 is arranged inside the valve main body 100 and is communicated with the second flow channel 120. The valve seat 300 is arranged in the valve cavity 200. The valve seat 300 includes a protruding wall 310 and a communicating flow channel 320 located inside the protruding wall 310. The communicating flow channel 320 is used to communicate the valve cavity 200 with the first flow channel 110. The valve assembly 400 is installed on the valve main body 100, and its end extends into the valve cavity 200 to close or open the communicating flow channel 320 by abutting against or moving away from the valve seat 300, thereby realizing the opening and closing of the valve body.

[0044] The bottom of the valve cavity 200 is provided with an annular bottom wall 210, and the annular bottom wall 210 is arranged around the outside of the valve seat 300. When the valve assembly 400 opens to connect the flow channel 320, the fluid enters the valve body through the first flow channel 110, then enters the valve cavity 200 through the connected flow channel 320. The fluid in the valve cavity 200 flows along the annular bottom wall 210 to the second flow channel 120, and finally flows out of the valve body through the second flow channel 120 to realize the opening of the valve body; when the valve assembly 400 closes the connected flow channel 320, the flow of the fluid between the connected flow channel 320 and the valve cavity 200 can be cut off to realize the closing of the valve body.

[0045] As Figure 4 shown, taking the vertical plane passing through the central axis of the second flow channel 120 as the reference plane M, the annular bottom wall 210 is asymmetrically arranged with respect to the reference plane M.

[0046] In the present utility model, by asymmetrically arranging the annular bottom wall 210 with respect to the reference plane M, the fluid pressures on both sides of the annular bottom wall 210 flowing through the reference plane M are unbalanced. When the annular bottom wall 210 inside the valve cavity 200 is symmetric with respect to the reference plane M, it will cause the fluid pressure near the reference plane M in the valve cavity 200 to be balanced or nearly balanced, so there will be a situation where the fluid flow is slow or almost non-flowing in the area corresponding to the annular bottom wall 210 and the reference plane M, thus a flow dead zone appears.

[0047] Therefore, the annular bottom wall 210 is arranged in an asymmetric structure with respect to the reference plane M to destroy the pressure balance in the valve cavity 200, so that the fluid near the annular bottom wall 210 is unbalanced with the fluid pressure at the corresponding positions on both sides of the reference plane M and the reference plane M. When the fluid flows in the valve cavity 200, the pressure difference generated by the pressure imbalance in the valve cavity 200 can push the fluid to flow rapidly in the valve cavity 200, avoiding the slow flow of the fluid at both ends of the annular bottom wall 210 far from and close to the second flow channel 120 to form a flow dead zone, and further avoiding the deposition of impurities in the flow dead zone and causing pollution to the subsequent fluid.

[0048] As Figure 4 shown, two planes that are symmetric with respect to the reference plane M and coincide with the central axis of the valve cavity 200 are defined as the section N. The annular bottom wall 210 is provided with a first part 215 and a second part 216 located between the two sections N, and both the first part 215 and the second part 216 are penetrated by the reference plane M. The first part 215 is the part of the annular bottom wall 210 far from the second flow channel 120, and the second part 216 is the part of the annular bottom wall 210 close to the second flow channel 120.

[0049] In this embodiment, the first part 215 is asymmetrically arranged with respect to the reference plane M, and the second part 216 is symmetrically arranged with respect to the reference plane M, so that the pressure of the fluid is unbalanced when flowing through the first part 215 on both sides of the reference plane M, resulting in a velocity difference of the fluid on both sides of the reference plane M at a position far from the second flow channel 120. Furthermore, the flow velocities of the fluid flowing through the second part 216 on both sides of the reference plane remain different, avoiding the formation of flow dead zones at the ends of the annular bottom wall 210 far from and close to the second flow channel 120 and preventing impurity deposition. It can be understood that even in this case, although the second part 216 is symmetric with respect to the reference plane M, due to the imbalance of the first part 215, there will be a difference in the velocities of the fluid flowing from the first part 215 to both sides of the second part 216, so the pressure balance at the second part 216 can also be disrupted to a certain extent.

[0050] In addition, in this embodiment, the first part 215 can also be symmetrically arranged with respect to the reference plane M, while the second part 216 is asymmetrically arranged with respect to the reference plane M, so that the pressure of the fluid on both sides of the reference plane is unbalanced when flowing through the second part 216, resulting in a velocity difference, which can also play a role in changing the flow velocities of the annular bottom wall 210 on both sides of the reference plane M, ultimately avoiding the formation of flow dead zones on the annular bottom wall 210.

[0051] Or as Figure 4 shown, in this embodiment, the first part 215 and the second part 216 can also be both asymmetrically arranged with respect to the reference plane, so that the flow velocities of the fluid finally flowing into the second flow channel 120 are different, avoiding the formation of flow dead zones on the annular bottom wall 210.

[0052] As Figure 2 and Figure 3 shown, the height of the annular bottom wall 210 gradually decreases from the end far from the second flow channel 120 to the end close to the second flow channel 120, that is, the annular bottom wall 210 is inclined towards the second flow channel 120. The annular bottom wall 210 has a highest point and a lowest point, and two guiding walls are formed between the highest point and the lowest point. One ends of the two guiding walls are connected at the highest point, and the other ends respectively bypass both sides of the valve seat 300 and finally converge at the lowest point. The highest point is located in the first part 215, and the lowest point is located in the second part 216. The highest point and the lowest point in this embodiment can be in the shape of a point, or a line, or a surface (i.e., a platform). When the highest point or the lowest point is in the shape of a line or a surface, the highest point or the lowest point can be penetrated by the reference plane but is asymmetric with respect to the reference plane itself, or the highest point or the lowest point is arranged on one side of the reference plane, resulting in the asymmetry of the first part 215 or the second part 216.

[0053] Preferably in this embodiment, as Figure 5As shown, the highest point is located on one side of the reference plane, and the lowest point is located on the reference plane. When the fluid enters the valve cavity 200, the fluid at the highest point will flow along the two diversion walls towards the second flow channel 120 under the action of gravity. Since the highest point is located on one side of the reference plane M, when the fluid flows along the diversion wall, the fluid pressures on both sides of the first part 215 with respect to the reference plane M are unbalanced, ensuring the liquid flow at the first part 215 and avoiding the formation of dead zones. And when the fluid flows to the lowest point, the fluid flow velocities on the two diversion walls are different, which can prevent the force balance at the lowest point of the annular bottom wall 210 from forming a flow dead zone. Since the lowest point is located on the reference plane, the lowest point of the annular bottom wall 210 is aligned with the inlet of the second flow channel 120, so that the fluid can quickly enter the second flow channel 120. Of course, it can be understood that, as Figure 4 shown, in this embodiment, the highest point can also be set on one side of the reference plane while the lowest point is set on the other side of the reference plane; or, the highest point is set on the reference plane and the lowest point is set on one side of the reference plane. The above two implementation manners can both disrupt the pressure balance of the fluid in the valve cavity.

[0054] In this embodiment, as Figure 2 and Figure 4 shown, taking the vertical plane perpendicular to the reference plane as the projection plane O, the end of the second flow channel 120 facing the valve seat 300 is provided with a water inlet 121 for communicating with the valve cavity 200. The lowest point of the annular bottom wall 210 can be completely aligned with the water inlet 121, so that the fluid can quickly enter the second flow channel 120. That is, the annular bottom wall 210 can be tangent to the bottom wall of the second flow channel 120, so that the projection of the lowest point of the annular bottom wall 210 on the projection plane O is completely within the projection of the water inlet 121 on the projection plane O, so that the fluid flowing to the lowest point can directly enter the second flow channel 120 through the water inlet 121 of the second flow channel 120.

[0055] Of course, the lowest point of the annular bottom wall 210 in this embodiment can also be set lower than the bottom wall of the second flow channel 120. The projection of the lowest point of the annular bottom wall 210 on the projection plane O is entirely located directly below the projection of the water inlet 121 on the projection plane O. When the fluid flowing to the lowest point flows towards the water inlet 121 of the second flow channel 120, it can also avoid the formation of dead corners between the lowest point of the annular bottom wall 210 and the water inlet 121 of the second flow channel 120 through scouring; alternatively, the lowest point is linear or planar. In this embodiment, the lowest point of the annular bottom wall 210 is tangent to the water inlet 121 of the second flow channel 120, but the lowest point still has a part located on the side of the tangent point, so that a part of the projection of the water inlet 121 on the projection plane O coincides with the projection of the lowest point of the annular bottom wall 210 on the projection plane O. At this time, the projection of the part of the lowest point located on the side of the tangent point is located directly below the projection of the water inlet 121 on the projection plane O, avoiding the distance between the edge of the lowest point and the lowest end of the water inlet 121 from being too large, and further avoiding the formation of dead corners that cannot be scoured by the fluid at the connection between the second flow channel 120 and the annular bottom wall 210.

[0056] Preferably, in this embodiment, as Figure 4 and Figure 5 shown, the highest point is the highest point 211 of the annular bottom wall 210, and the lowest point is the lowest point 212 of the annular bottom wall 210. At the same time, the vertical plane passing through the highest point 211 and the lowest point 212 is located on one side of the central axis of the valve cavity 200, that is, the projection of the line connecting the highest point 211 and the lowest point 212 on the horizontal plane does not pass through the projection of the central axis of the valve cavity 200 on the horizontal plane. Because when the vertical plane passing through the highest point 211 and the lowest point 212 coincides with the central axis of the valve cavity 200, if the angle of the highest point 211 deviating from the reference plane is too large, the lowest point 212 will also deviate from the reference plane by the same angle, and then the lowest point 212 will deviate from the inlet of the second flow channel 120, that is, the lowest point 212 is far from the second flow channel 120 in the horizontal direction, and the height difference and distance between the inlet of the second flow channel 120 and the lowest point 212 are large, resulting in some of the fluid flowing to the lowest point 212 being unable to flow to the second flow channel 120, causing the deposition of impurities or crystallization. Therefore, the setting of the vertical plane passing through the highest point 211 and the lowest point 212 deviating from the central axis of the valve cavity 200 makes the angle of the lowest point 212 deviating from the reference plane M independent of the angle of the highest point 211 deviating from the reference plane M. Even if the highest point 211 deviates from the reference plane by a large angle, the lowest point 212 can still be aligned with the second flow channel 120 (such as the situation where the lowest point 212 is directly below the water inlet 121 or coincides with the water inlet 121 as described above), ensuring the smooth flow of the fluid at the lowest point 212 to the second flow channel 120 to avoid the slow flow of the fluid at the lowest point 212 of the annular bottom wall 210 and the deposition of impurities.

[0057] As Figure 6As shown, the connection line between the projection of the highest point 211 in the horizontal plane and the projection of the central axis of the valve cavity 200 in the horizontal plane in this embodiment is L1, and the projection of the central axis of the second flow channel 120 in the horizontal plane is L2. It is stipulated that the included angle between L1 and L2 is α, where 90° ≤ α ≤ 170°. When α is greater than 170°, the highest point 211 is too close to the reference plane M, and the effect of destroying the pressure balance in the valve cavity 200 is poor; when α is less than 90°, the length difference between the two diversion walls between the highest point 211 and the lowest point 212 is large, resulting in too slow a fluid velocity on the longer diversion wall, causing the fluid to not pass quickly in the valve cavity 200, and it is easy to have impurities or crystal sedimentation accumulation. Therefore, by setting α within the range of 90° to 170°, the included angle of the highest point 211 deviating from the reference plane is restricted to ensure the user experience. The value of α can be 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°. Preferably, α is 170°.

[0058] In this embodiment, as Figure 4 , Figure 5 and Figure 6 shown, the valve seat 300 is asymmetrically arranged with respect to the reference plane M. The asymmetric valve seat 300 can make the size of the annular bottom wall 210 asymmetric or make the liquid pressures on both sides unequal, thereby further destroying the pressure balance of the annular bottom wall 210 of the valve cavity 200 to avoid the appearance of flow dead zones on the annular bottom wall 210.

[0059] Specifically, it can be achieved by eccentrically arranging the communication flow channel 320 of the valve cavity 200 (that is, the central axis of the communication flow channel 320 does not coincide with the central axis of the valve cavity 200), or by eccentrically arranging the outer side wall of the valve seat 300 (the central axis of the outer side wall of the valve seat 300 does not coincide with the central axis of the valve cavity 200). Of course, it is also possible to eccentrically arrange both the communication flow channel 320 of the valve cavity 200 and the outer side wall of the valve seat 300 at the same time.

[0060] Preferably, as Figure 5As shown in the figure, the connecting flow channel 320 is symmetrically arranged with respect to the reference plane M. The protruding wall 310 has a thick wall portion 311 and a thin wall portion 312. The thick wall portion 311 and the thin wall portion 312 are respectively located on both sides of the reference plane M. Due to the different thicknesses of the thick wall portion 311 and the thin wall portion 312, the widths of the annular bottom wall 210 on both sides of the reference plane M are different. When the fluid enters the valve cavity 200 from the connecting flow channel 320, at this time, the flow rate on the thin wall side 311 will be larger, and the flow rate on the thick wall portion 312 side will be smaller. Furthermore, the pressure on the thin wall portion 311 side will be greater, and the pressure on the thick wall portion 312 side will be smaller, thereby destroying the pressure balance of the annular bottom wall 210 in the valve cavity 200 and avoiding the occurrence of flow dead zones on the annular bottom wall 210. Preferably, the outer side wall of the valve seat 300 can be set to a spindle shape, and its streamline-like structure can enhance the flow guiding effect on both sides of the valve seat 300 to increase the flow velocity of the fluid.

[0061] As Figure 5 shown, the two flow guiding walls between the highest point and the lowest point of the annular bottom wall 210 are respectively defined as the first section 213 and the second section 214. In this embodiment, the first section 213 is shorter than the second section 214. The highest point of the annular bottom wall 210, the thick wall portion 311, and the first section 213 are all located on the same side of the reference plane M. Because the thick wall portion 311 and the first section 213 are arranged on the same side of the reference plane M, the width of the first section 213 is relatively narrow, and thus the flow rate of the first section 213 is smaller and the flow velocity is slower. In order to avoid deposition on the first section 213 due to the slow flow velocity of the fluid, the highest point of the annular bottom wall 210 is set on this side of the reference plane M, thereby shortening the length of the first section 213 and making the first section 213 shorter than the second section 214. Under the same height difference, the length of the first section 213 is less than that of the second section 214, so the slope of the first section 213 is greater than that of the second section 214, that is, the first section 213 is steeper than the second section 214, which can accelerate the flow velocity of the fluid on the first section 213 and avoid the deposition of impurities due to the too slow flow velocity of the fluid on the first section 213. Of course, since the lowest point 212 may be on one side of the reference plane M, the foregoing means that the main part of the first section 213 is located on the same side of the reference plane M as the highest point of the annular bottom wall 210 and the thick wall portion 311, but the bottom end portion of the first section 213 may not be on the same side as the highest point of the annular bottom wall 210 and the thick wall portion 311.

[0062] Of course, in the foregoing, the first flow channel 110 can also be the liquid outflow channel, and the second flow channel 120 can be the liquid inflow channel. Through the foregoing asymmetric annular bottom wall 210, it is also possible to achieve a certain effect of avoiding the pressure balance of the fluid near the annular bottom wall 210 and generating flow dead zones.

[0063] Embodiment 2:

[0064] As Figure 7As shown in the figure, the difference between this embodiment and the first embodiment is that, in this embodiment, the second part 216 of the annular bottom wall 210 has a sunken wall, and the second part 216 forms a drainage groove 2161 located on the second part 216 through the sunken wall. The drainage groove 2161 opens upward and communicates with the second flow channel 120. The drainage groove 2161 can be located on either side of the reference plane M, so that the annular bottom walls 210 on both sides of the reference plane M are asymmetric; the drainage groove 2161 can also be divided by the reference plane M (that is, the drainage groove 2161 straddles both sides of the reference plane M), and at the same time the drainage groove 2161 is not symmetric about the reference plane M, so that the annular bottom walls 210 on both sides of the reference plane M are asymmetric; to avoid the existence of a pressure balance area on the annular bottom wall 210 and form a flow dead zone on the annular bottom wall 210, thereby avoiding the deposition of impurities in the flow dead zone and contaminating the subsequent fluid.

[0065] Embodiment Three

[0066] As Figure 8 shown, the difference from the first or second embodiment is that the annular bottom wall 210 is generally horizontally arranged, and the protruding wall 310 has thick wall portions 311 and thin wall portions 312 located on both sides of the reference plane M. Due to the different thicknesses of the thick wall portions 311 and the thin wall portions 312, the widths of the annular bottom wall 210 on both sides of the reference plane M are different. When the fluid enters the valve cavity 200 from the communicating flow channel 320, at this time, the flow rate on the thin wall side 311 will be larger, and the flow rate on the thick wall portion 312 side will be smaller, and further, the pressure on the thin wall portion 311 side will be larger, and the pressure on the thick wall portion 312 side will be smaller, thereby destroying the pressure balance of the annular bottom wall 210 in the valve cavity 200 and avoiding the occurrence of a flow dead zone on the annular bottom wall 210.

[0067] Embodiment Four

[0068] As Figure 9 shown, the difference from the second embodiment is that the annular bottom wall 210 is generally horizontally arranged, and the valve seat 300 is symmetrically arranged about the reference plane M, so as to realize the structural asymmetry of the annular bottom wall 210 through the asymmetric drainage groove 2161, and further realize the state where the fluid cannot reach pressure balance near the annular bottom wall 210, thereby avoiding the occurrence of a flow dead zone.

[0069] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as within the protection scope of the present invention.

Claims

1. A valve body, comprising: A valve main body having a first flow channel and a second flow channel for fluid inlet and outlet; A valve cavity disposed inside the valve main body, the valve cavity communicating with the second flow channel; A valve seat disposed in the valve cavity and including a protruding wall and a communicating flow channel inside the protruding wall, the communicating flow channel being used to communicate the valve cavity with the first flow channel, the valve cavity having an annular bottom wall surrounding the outside of the valve seat; A valve assembly mounted on the valve main body and extending into the valve cavity to cooperate with the valve seat to open and close the valve body; Characterized in that, taking the vertical plane passing through the central axis of the second flow channel as a reference plane, the annular bottom wall is asymmetrically arranged with respect to the reference plane.

2. The valve body according to claim 1, wherein Let two planes symmetric with respect to the reference plane and coinciding with the central axis of the valve cavity be cross-sections, the annular bottom wall has a first part and a second part located between the two cross-sections and penetrated by the reference plane, the first part is the part far from the second flow channel, and the second part is the part close to the second flow channel; Wherein, the first part is asymmetrically arranged with respect to the reference plane, and / or the second part is asymmetrically arranged with respect to the reference plane.

3. A valve body according to claim 2, characterized in that, The annular bottom wall is inclined and has a highest point and a lowest point, the highest point is located in the first part, and the lowest point is located in the second part; Wherein, The highest point is located on one side of the reference plane, and / or the lowest point is located on one side of the reference plane.

4. A valve body according to claim 2, wherein The second part has a sunken wall, and a drainage groove is formed by the sunken wall, the drainage groove is communicated with the second flow channel, and the drainage groove is located on one side of the reference plane or is divided by the reference plane and is asymmetrically arranged with respect to the reference plane.

5. A valve body according to claim 3, characterized in that, One end of the second flow channel facing the valve seat is provided with a water inlet for communicating with the valve cavity, taking the vertical plane perpendicular to the reference plane as a projection plane; In the projection, the projection of the lowest point is all located directly below the projection of the water inlet; or, the projection of the lowest point coincides with the projection of the water inlet; or, the projection of the lowest point has a part coinciding with the projection of the water inlet, and both sides of the projection of the lowest point are located directly below the projection of the water inlet.

6. A valve body according to claim 3, wherein The highest point is the highest point, the lowest point is the lowest point, and the vertical plane passing through the highest point and the lowest point is located on one side of the central axis of the valve cavity.

7. A valve body according to claim 3, characterized in that, The highest point is the highest point, the lowest point is the lowest point, in the projection on the horizontal plane, the projection connection line between the projection of the highest point and the projection of the central axis of the valve cavity is L1, the projection of the central axis of the second flow channel is L2, and the included angle between L1 and L2 is α, where 90°≤α≤170°.

8. A valve body according to any one of claims 1-7, characterized in that, The valve seat is asymmetrically arranged with respect to the reference plane.

9. A valve body according to claim 8, wherein, The communicating flow channel is symmetrically arranged with respect to the reference plane, the protruding wall has a thick wall part and a thin wall part respectively located on both sides of the reference plane, and the widths of the annular bottom wall on both sides of the reference plane are different.

10. A valve body according to claim 9, characterized in that, When the annular bottom wall is inclined, a first section and a second section are formed between the highest point and the lowest point of the annular bottom wall, and the first section is shorter than the second section; Wherein, the highest point, the thick wall part and the first section are all located on the same side.

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