Combination valve

Abstract

The utility model relates to a combination valve which comprises a manifold block provided with a main flow channel, a liquid outlet flow channel, a plurality of valve cavities located between the main flow channel and the liquid outlet flow channel, and communicating flow channels used for communicating the main flow channel and the valve cavities respectively. The cover assembly is mounted on the manifold block, and a mounting cavity opposite to the valve cavity is formed in the cover assembly; the mounting cavity and the valve cavity are arranged in a separated mode through the valve assembly, and the valve assembly can move to control connection and disconnection of the valve cavity and the communicating flow channel; the driving assembly is arranged in the mounting cavity, is connected with the valve assembly and is used for driving the valve assembly to move; the communicating flow channel is provided with a first end communicated with the main flow channel and a second end communicated with the valve cavity, and the main flow channel is provided with a liquid inlet end; at least one communicating flow channel is obliquely arranged, and the second end of the oblique communicating flow channel is located on the side, away from the liquid inlet end, of the first end in the flowing direction of fluid in the main flow channel. The communication flow channel is arranged to be of an inclined structure, so that the flow in the communication flow channel can be increased.

Description

Technical Field

[0001] This utility model relates to the field of fluid control valve technology, and in particular to a combination valve. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control the flow direction, and regulate and control the parameters (temperature, pressure, and flow rate) of the conveyed medium. When multiple valve bodies are required in a pipeline system, they are often combined together to reduce the space occupied by the valve bodies.

[0003] Patent JP4746487B2 discloses a combination valve that includes a first manifold block 110, in which a common flow path 112 is formed. This common flow path 112 has a horizontal hole drilled from the center of its outer surface and communicates with first flow paths 111A, 111B, and 111C, respectively. The central axes of the first flow paths 111A, 111B, and 111C are perpendicular to the central axis of the common flow path 112. A connector 50D is integrally disposed on the end face where the common flow path 112 is located and communicates with it. The end of the connector 50D is the inlet end of the common flow path 112, meaning that the first flow path 111C is closer to the inlet end of the common flow path 112.

[0004] In combination valves like the one described above, since multiple first flow paths are connected on the side wall of the common flow path, the flow rate in the first flow path may be relatively small during actual use. This may even cause the flow path to fail to meet the required flow rate, thus resulting in the combination valve's performance failing to meet the user's requirements. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, this utility model provides a combined valve, which has at least one connecting channel set at an angle, thereby increasing the flow rate of the main channel flowing into the angled connecting channel and avoiding the problem of insufficient flow rate of the branch channels flowing into the connecting channel.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a combined valve, comprising:

[0007] The manifold block is provided with a main flow channel, an outlet flow channel, multiple valve chambers located between the main flow channel and the outlet flow channel, and connecting channels for connecting the main flow channel and the valve chambers respectively.

[0008] The cover assembly is mounted on the manifold block and has an internal mounting cavity that is opposite to the valve chamber.

[0009] A valve assembly separates the mounting cavity from the valve cavity, and the movement of the valve assembly can control the opening and closing of the valve cavity and the communicating flow channel;

[0010] A drive assembly is disposed in the mounting cavity and connected to the valve assembly to drive the valve assembly to move;

[0011] The connecting channel has a first end connected to the main channel and a second end connected to the valve chamber, and the main channel has a liquid inlet end;

[0012] At least one of the connecting channels is inclined, and along the flow direction of the fluid in the main channel, the second end of the inclined connecting channel is located on the side of the first end away from the inlet end.

[0013] By setting the connecting channel as the aforementioned inclined structure, compared to the structural design where the connecting channel is perpendicular to the main channel, it is possible to reduce the angle between the flow direction of the fluid in the main channel and the flow direction in the connecting channel. In other words, it is possible to reduce the turning angle of the fluid when it moves from the main channel to the connecting channel, thereby reducing the centrifugal force during the turn and further reducing the range of vortices generated during the turn. This reduces local energy loss in the connecting channel and increases the fluid velocity within the connecting channel, thereby increasing the flow rate within the connecting channel compared to the structural design where the connecting channel is perpendicular to the main channel.

[0014] Furthermore, there are two or more inclined connecting channels, and along the flow direction of the fluid in the main channel, the angle between the central axis of the inclined connecting channels and the central axis of the main channel gradually increases.

[0015] In actual testing, it was found that within the combination valve, among the multiple connecting channels that are connected to the main flow channel, the flow rate is lower the closer the connecting channel is to the inlet end. This is likely because the fluid velocity is higher closer to the inlet end in the main flow channel, resulting in a relatively lower pressure at the first end of the connecting channel. Consequently, the pressure difference between the first and second ends of the connecting channel is relatively small, which in turn leads to a relatively lower flow rate in the connecting channel closer to the inlet end.

[0016] By controlling the angle of inclination of the connecting channels, the increase in flow rate in each connecting channel can be different. Specifically, the increase in flow rate is greater closer to the inlet end, thereby ensuring that the flow rate in each connecting channel is the same or similar and avoiding excessive differences in flow rate in each connecting channel.

[0017] Furthermore, in adjacent connecting channels, the diameter of the first end of the connecting channel closer to the liquid inlet is larger than the diameter of the first end of the connecting channel farther from the liquid inlet.

[0018] By increasing the diameter of the first end of the connecting channel, more fluid from the main channel can enter the connecting channel more easily, thus increasing the flow rate within that channel. Similarly, to avoid the situation where the flow rate decreases closer to the inlet end of the connecting channel, the diameters of the first ends of multiple connecting channels can be controlled to regulate the flow rate in each channel. Specifically, the diameter of the first end of the connecting channel closer to the inlet end is larger than the diameter of the first end of the connecting channel farther from the inlet end, thereby controlling the flow rate in each connecting channel and ensuring that the flow rate difference between the various connecting channels is not too large.

[0019] Meanwhile, the connecting channel can be a cylindrical hole structure or a conical hole structure with the second port diameter larger than the first port diameter.

[0020] Furthermore, the bottoms of multiple valve chambers are located at the same height, and the main flow channel is located below the height of the bottom of the valve chamber. Along the flow direction of the fluid in the main flow channel, the distance between the central axis of the main flow channel and the bottom of the valve chamber gradually increases.

[0021] With this configuration, the height difference between the main flow channel and the valve chamber gradually increases from the inlet end. The greater the height difference, the greater the gravitational force the fluid in the main flow channel must overcome to enter the valve chamber through the connecting channels, resulting in a relatively smaller flow rate in the connecting channels. Conversely, the height difference between the connecting channels closer to the inlet end and the second end of the connecting channels further away from the inlet end is relatively smaller, thus relatively increasing the flow rate in the connecting channels closer to the inlet end. In other words, this configuration balances the flow rates in multiple connecting channels, preventing the flow rate in each connecting channel from gradually decreasing as it approaches the first end.

[0022] Furthermore, the central axis of the connecting channel is arranged to intersect with the central axis of the main channel.

[0023] This configuration allows the fluid inside the main flow channel to more easily enter the connecting flow channel, ensuring the flow rate inside the connecting flow channel and preventing situations where the flow rate inside the connecting flow channel is too low.

[0024] Furthermore, the liquid outlet channel, valve chamber, connecting channel, and valve assembly are provided in at least two columns, and the main channel is one, which is connected to at least two columns of the connecting channels.

[0025] This configuration only requires opening a main channel on the manifold block, simplifying the overall structure of the combination valve. Moreover, it can fulfill more functions while maintaining a smaller overall size, resulting in a high degree of integration for the combination valve.

[0026] Furthermore, the manifold block is symmetrically provided with two rows of valve chambers, connecting channels, and valve assemblies at its top and / or bottom. Along the flow direction of the fluid in the main channel, the distance between the first ends of the two rows of connecting channels gradually decreases.

[0027] Increasing the end distance between the two connecting channels prevents the fluids flowing into them from interfering with each other and avoids the formation of eddies between the two channels that would reduce the flow rate of the fluid entering the connecting channels. This results in a relatively larger flow rate distributed between the two connecting channels. Therefore, through this arrangement, the flow rate in the connecting channel near the inlet end is similar to the flow rate in the connecting channel farther from the inlet end, reducing the flow rate difference between the connecting channels and preventing excessive flow rate differences.

[0028] Furthermore, along the direction of fluid flow within the main channel, the first ends of the connecting channels in different columns are staggered and arranged.

[0029] Since the outer perimeter of the main channel is relatively limited, the distance between the first ends of the two connected channels cannot be made larger under the inclined structure of the connecting channels. Therefore, the first ends of the connecting channels in different columns are staggered to avoid the first ends of the connecting channels in different columns being too close, which would cause the fluid entering the two connecting channels to affect each other. This also avoids the formation of eddies between the two connecting channels, which would reduce the flow rate of the fluid entering the connecting channels. As a result, the flow rate of the fluid entering the two connecting channels is distributed to be relatively large, which can effectively avoid the problem of the fluid flow rate being too small in the connecting channels near the liquid inlet. The staggered distribution of the first ends of the connecting channels in different columns can also reduce the impact of water hammer effect on the fluid flow rate in the connecting channels connected to the other valve chambers when one valve assembly is closed.

[0030] Furthermore, the cover assembly includes multiple housings, each housing having at least two mounting cavities.

[0031] Each housing has at least two mounting cavities, reducing the number of housings and consequently the number of cover assemblies, making the installation and removal of the combination valve more convenient.

[0032] Furthermore, the mounting cavity inside the housing is simultaneously provided with corresponding valve cavities in two rows at the top or bottom of the manifold block;

[0033] The housing is connected to the manifold block by bolt assemblies, and the bolt assemblies are located on the outer periphery of the mounting cavity and the valve cavity, so that the main flow channel, the valve cavity and the connecting flow channel are located within the space enclosed by multiple bolt assemblies.

[0034] This design reduces the distance between the main flow channel, valve chamber, and connecting flow channel, further improving the integration of the combined valve. The housing and manifold block are fixed together using bolt assemblies, which are not located between the mounting cavity, valve chamber, main flow channel, or connecting flow channel. This avoids interference between the bolt assemblies and these components, and also prevents the bolt assemblies from causing thinner inner walls in these components, which could lead to weaker internal pressure resistance. Therefore, this design facilitates the fixed installation of the housing and manifold block while reducing the overall size of the combined valve.

[0035] Furthermore, the valve assembly includes a sealing portion that mates with the manifold block, and a support member is provided between the housing and the sealing portion, the housing pressing the sealing portion against the manifold block via the support member;

[0036] The support member has a bottom surface opposite to the manifold block and a pressing surface abutting against the sealing part, with a height of H1 between the two. The height of the sealing part when it is not compressed is H2. The manifold block is provided with a sealing groove that cooperates with the sealing part. The height between the bottom of the sealing groove and the top wall of the manifold block is H3, where H1+H2>H3.

[0037] A support is provided between the housing and the manifold block, and the support surrounds the diaphragm and presses against the sealing part. The pressure of the housing is transmitted to the diaphragm and the sealing part through the support, ensuring a stable and effective seal between the diaphragm, the sealing part and the manifold block. Since H1+H2>H3, it can be ensured that the sealing part can be effectively squeezed by the support when the housing and the manifold block clamp the support in opposite directions. This avoids the bottom surface of the support from abutting against the top wall of the manifold block when the sealing part is not effectively squeezed, ensuring a good sealing effect between the sealing part and the sealing groove.

[0038] The beneficial effects of this utility model are as follows: the inclined setting of the connecting channel can reduce the angle of the flow direction change when the main channel enters the connecting channel, thereby reducing the eddy currents during the angle change, reducing local energy loss in the connecting channel, increasing the fluid velocity in the connecting channel, and increasing the flow rate in the connecting channel relative to the structural design of the connecting channel being perpendicular to the main channel; by gradually increasing the included angle of the connecting channel along the flow direction of the fluid in the main channel, or by gradually decreasing the diameter of the first end of the connecting channel, or by gradually increasing the height difference between the main channel and the valve cavity, it can be ensured that the flow rate of the fluid in the main channel entering two or more connecting channels is relatively balanced, avoiding excessive flow differences in multiple connecting channels. Attached Figure Description

[0039] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model;

[0040] Figure 2 for Figure 1 Partial cross-sectional view of the three-dimensional structure;

[0041] Figure 3 for Figure 2 Schematic diagram of the side view structure of the central manifold block;

[0042] Figure 4 This is a side sectional view of the manifold block in Embodiment 1 of the present utility model. In Figure a, the central axis of the main channel does not intersect with the central axis of the connecting channel, while in Figure b, the central axis of the main channel intersects with the central axis of the connecting channel.

[0043] Figure 5 This is a cross-sectional view of the manifold block according to Embodiment 2 of this utility model;

[0044] Figure 6 This is a cross-sectional side view of the manifold block according to an embodiment of the present invention;

[0045] Figure 7 This is a schematic diagram of the internal structure of the main channel of the manifold block in Embodiment 3 of this utility model;

[0046] Figure 8 This is a cross-sectional view of the manifold block according to an embodiment of the present invention;

[0047] Figure 9 This is a three-dimensional structural diagram of Embodiment 5 of the present utility model;

[0048] Figure 10 This is a cross-sectional view of the manifold block in Embodiment 5 of this utility model;

[0049] Figure 11 This is a cross-sectional view of the manifold block in Embodiment 5 of this utility model;

[0050] Figure 12 This is a side sectional view of the combined valve in Embodiment 5 of this utility model;

[0051] Figure 13 for Figure 12 Enlarged structural diagram at point C;

[0052] Figure 14 This is a cross-sectional view of the bolt assembly in Embodiment 5 of the present invention;

[0053] Figure 15 This is a bottom cross-sectional view of the manifold block according to Embodiment 6 of this utility model;

[0054] Figure 16 This is a bottom sectional view of the manifold block in Embodiment 7 of this utility model.

[0055] Among them, 1. Manifold block; 11. Sealing groove; 2. Main channel; 21. Inlet end; 3. Outlet channel; 4. Valve chamber; 5. Connecting channel; 51. First end; 52. Second end; 6. Cover assembly; 61. Mounting cavity; 62. Housing; 7. Valve assembly; 71. Sealing part; 72. Support; 721. Bottom surface; 722. Pressing surface; 73. Diaphragm; 8. Drive assembly; 9. Bolt assembly. Detailed Implementation

[0056] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0057] Example 1

[0058] like Figures 1 to 4 As shown, a combination valve includes a manifold block 1, a cover assembly 6 mounted on the manifold block 1, a valve assembly 7, and a drive assembly 8 connected to the valve assembly 7 and used to drive the valve assembly 7 to move. The manifold block 1 is provided with a main flow channel 2, an outlet flow channel 3, multiple valve chambers 4 located between the main flow channel 2 and the outlet flow channel 3, and a connecting flow channel 5 for connecting the main flow channel 2 and the valve chambers 4 respectively. The main flow channel 2 has an inlet end 21, and whether the main flow channel 2 has an outlet end is not limited, that is, the other end of the main flow channel 2 opposite to the inlet end 21 can be a closed structure. The cover assembly 6 has an installation cavity 61 formed inside, which is disposed opposite to the valve chambers 4. When the manifold block 1, the cover assembly 6, and the valve assembly 7 are assembled, the valve assembly 7 separates the installation cavity 61 from the valve chambers 4, and the movement of the valve assembly 7 can control the opening and closing of the valve chambers 4 and the connecting flow channel 5.

[0059] In this embodiment, the number of connecting channels 5 is the same as the number of valve chambers 4, and the number of valve chambers 4 is the same as the number of outlet channels 3. Therefore, there are multiple connecting channels 5 and multiple outlet channels 3. Furthermore, the opening and closing of each outlet channel 3 can be controlled by controlling the valve assemblies in the multiple valve chambers 4. During use, the combined valve flows into the main channel 2, and then flows into the multiple valve chambers 4 through the distribution of the multiple connecting channels 5. The movement of the valve assembly 7 controls the opening and closing of the valve chambers 4 and the connecting channels 5, thereby realizing the function of the fluid in the main channel 2 flowing out from the multiple outlet channels 3 after passing through the multiple connecting channels 5.

[0060] Of course, in other embodiments, the number of liquid outlet channels 3 can also be one, that is, multiple valve chambers 4 are connected to each other, and a liquid outlet channel 3 is opened on the side wall of any valve chamber 4. There is no specific limitation. In this case, by controlling the valve assembly of multiple valve chambers 4, the number of connected channels 5 can be controlled to adjust the flow rate of the liquid outlet channel 3.

[0061] like Figure 2 , Figure 3 As shown, the connecting channel 5 has a first end 51 connected to the main channel 2 and a second end 52 connected to the valve chamber 4. At least one connecting channel 5 is inclined and is positioned along the flow direction of the fluid in the main channel 2. Figure 3 In the direction indicated by the middle arrow, the second end 52 of the inclined connecting channel 5 is located on the side of the first end 51 away from the liquid inlet end 21.

[0062] Draw perpendicular lines L1 and L2 from the centers of the first end 51 and the second end 52 to the central axis of the main channel 2. Figure 3 It can be seen that the vertical line L2 is further away from the liquid inlet end 21 than the vertical line L1. That is, as mentioned above, along the direction of fluid flow in the main channel 2, the second end 52 is located on the side of the first end 51 that is far away from the liquid inlet end 21.

[0063] like Figure 2 , Figure 3 As shown, it should be noted that by setting the connecting channel 5 as the aforementioned inclined structure, relative to the structural design of the connecting channel 5 being perpendicular to the main channel 2, it is possible to reduce the angle between the flow direction of the fluid in the main channel 2 and the flow direction in the connecting channel 5. That is, it is possible to reduce the turning angle of the fluid when it moves from the main channel 2 to the connecting channel 5, thereby reducing the centrifugal force during the turn and further reducing the range of the vortex. This reduces the local energy loss of the connecting channel 5 and increases the fluid velocity within the connecting channel 5, thereby increasing the flow rate within the connecting channel 5 relative to the structural design of the connecting channel 5 being perpendicular to the main channel 2.

[0064] Furthermore, it is possible to make part of the connecting flow channel 5 inclined, or as follows: Figure 2 , Figure 3 As shown, all connecting channels are inclined as described above, so that the flow rate in each connecting channel 5 can be increased.

[0065] like Figure 4 As shown, the inclined arrangement of the connecting channel 5 includes the case where the central axis of the connecting channel 5 and the central axis O of the main channel 2 do not intersect, i.e., as... Figure 4 As shown in section a, this also includes the case where the central axis of the connecting channel 5 intersects with the central axis O of the main channel 2, i.e., as... Figure 4As shown in b. In this embodiment, it is preferable that the central axis of the connecting channel 5 intersects with the central axis O of the main channel 2, so that more fluid in the main channel 2 can flow into the connecting channel 5 to ensure the flow rate in the connecting channel 5.

[0066] In this embodiment, the connecting channel 5, valve chamber 4, valve assembly 7, and liquid outlet channel 3 are all single-row structures.

[0067] Example 2

[0068] The difference in Example 1 is:

[0069] Reference Figure 5 At least two of the connecting channels 5 are inclined, and along the flow direction of the fluid in the main channel 2, the angle between the central axis of the inclined connecting channel 5 and the central axis of the main channel 2 gradually increases.

[0070] Let the plane passing through the central axis of the connecting channel 5 and parallel to the central axis of the main channel 2 in the region of the first end 51 of the connecting channel be the reference plane. The aforementioned included angle refers to the angle between the central axis of the inclined connecting channel 5 and the central axis of the main channel 2 in the projection of this reference plane. Figure 5 .

[0071] In actual testing, it was found that when all the multiple connecting channels 5 are connected, the flow rate of the connecting channel 5 is smaller the closer it is to the liquid inlet 21, resulting in uneven flow distribution.

[0072] Therefore, in order to solve the above-mentioned technical problems, the average flow rate in each connecting channel 5 is referenced. Figure 5 In the main channel 2, the direction indicated by the arrow is the direction of fluid flow. The angle between the central axis of the connecting channel 5 and the central axis of the main channel 2 is α. The angle of the first connecting channel 5 near the liquid inlet 21 is defined as α1. Along the direction of fluid flow in the main channel 2 (indicated by the arrow), the angles of the second to sixth connecting channels 5 are defined as α2, α3, α4, α5, and α6, respectively, where α1 < α2 < α3 < α4 < α5 < α6.

[0073] Reference Figure 5 Since the smaller the included angle α, the easier it is for the fluid in the main channel 2 to enter the interior of the connecting channel 5, and the smaller the change in the flow direction of the fluid after it moves from the main channel 2 to the connecting channel 5, it can ensure that the setting is perpendicular to the central axis of the main channel 2 relative to the central axis of the connecting channel 5, and the flow rate increase in the connecting channel 5 is greater.

[0074] With the above settings, the flow rate increase of the first connecting channel 5 to the sixth connecting channel 5 can be gradually reduced. While tilting the connecting setting 5 to increase the flow rate in the connecting channel 5, the flow rate distribution of each connecting channel 5 can be made more uniform, avoiding the problem that the fluid flow rate of a certain connecting channel 5 is too small, especially avoiding the problem that the fluid flow rate in the connecting channel 5 near the liquid inlet 21 is too small.

[0075] In this embodiment, it can be as follows: Figure 5 All the connecting channels 5 shown are inclined. Alternatively, some connecting channels 5 may have their central axis perpendicular to the flow direction of the main channel 2, or be inclined in the opposite direction to the flow direction of the main channel 2.

[0076] Example 3

[0077] The difference from Examples 1 and 2 is that:

[0078] like Figure 6 , Figure 7 As shown, in this embodiment, along the flow direction of the fluid in the main channel 2, among adjacent connecting channels 5, the diameter of the first end 51 of the connecting channel 5 closer to the inlet end 21 is larger than the diameter of the first end 51 of the connecting channel 5 farther from the inlet end 21. This avoids the situation where, when all multiple connecting channels 5 are connected, the flow rate of the connecting channel 5 is smaller the closer it is to the inlet end 21.

[0079] Specifically, such as Figure 6 , Figure 7 As shown, the diameter of the first end 51 of the first connecting channel 5 near the liquid inlet 21 is defined as D1. Along the flow direction of the fluid in the main channel 2 (the direction indicated by the arrow in the main channel 2), the diameters of the first ends 51 of the second connecting channel 5 to the sixth connecting channel 5 are defined as D2, D3, D4, D5, and D6 respectively, and D1 > D2 > D3 > D4 > D5 > D6.

[0080] Since the flow rate in the connecting channel 5 is smaller closer to the inlet end 21, meaning that along the fluid flow direction in the main flow channel 2, the flow rate in the connecting channel 5 closer to the inlet end 21 is relatively smaller among two adjacent connecting channels 5, increasing the diameter of the first end 51 of the connecting channel 5 closer to the inlet end 21 can increase the flow rate of that connecting channel 5. This ensures that the fluid flow rates in two adjacent connecting channels 5 are the same or similar, avoiding significant differences in flow rates between adjacent connecting channels 5. Similarly, by using D1 > D2 > D3 > D4 > D5 > D6, the flow rates of multiple connecting channels 5 can be relatively balanced, preventing the fluid flow rate of any one connecting channel 5 from being too low.

[0081] It should be noted that the number of connecting channels 5 is not limited to the number shown in the figure, and can be two, three or more.

[0082] Meanwhile, the connecting flow channels 5 are cylindrical channels with the same diameter, or they can be conical structures with the diameter of the first end 51 being smaller than the diameter of the second end 52. Furthermore, the diameter of the second end 52 in each connecting flow channel 5 can be the same, so that the flow state of the fluid after entering the valve cavity is similar.

[0083] Furthermore, in this embodiment, all connecting channels 5 can be inclined, or some connecting channels 5 can be inclined; the included angle α of each connecting channel 5 can be set to be equal, or the included angle α of each connecting channel can be set to be different, so as to achieve a relatively average flow rate in each connecting channel 5 by changing the included angle of the connecting channel 5 and the diameter of the first end 51.

[0084] Example 4

[0085] The difference from Examples 1 to 3 is as follows:

[0086] like Figure 8 As shown, the bottoms of multiple valve chambers 4 are at the same height, and the main flow channel 2 is located below the height of the bottom of the valve chambers 4. Along the flow direction of the fluid in the main flow channel 2, the distance between the central axis of the main flow channel 2 and the bottom of the valve chamber 4 gradually increases. This arrangement avoids the situation where, when all multiple connecting channels 5 are connected, the flow rate of the connecting channel 5 is smaller closer to the inlet end 21.

[0087] like Figure 8 As shown, the main flow channel 2 is inclined downward along the direction of fluid flow, away from the inlet end 21. Thus, the height difference between the main flow channel 2 and the valve chamber 4 gradually increases from the inlet end 21. That is, the closer to the inlet end 21, the easier it is for the fluid to enter the valve chamber 4 through the connecting flow channel 5. The farther away from the inlet end 21, the more difficult it is for the fluid to enter the valve chamber through the connecting flow channel 5. Therefore, this arrangement balances the flow rate in each connecting flow channel 5, thereby achieving the purpose of relatively balanced fluid flow rate entering each connecting flow channel 5.

[0088] Of course, the three variables, namely the angle between the central axis of the connecting channel 5 and the central axis of the main channel 2, the change in the diameter of the first end 51 of the connecting channel 5, and the change in the distance between the central axis of the main channel 2 and the bottom of the valve chamber 4, can be superimposed or superimposed in pairs, as long as the fluid flow rate of different connecting channels 5 can be relatively balanced, and no specific restrictions are imposed.

[0089] Example 5

[0090] The difference from Examples 1 to 4 is as follows:

[0091] like Figures 9-13 As shown, the outlet flow channel 3, valve chamber 4, connecting flow channel 5, and valve assembly 7 are arranged in at least two rows. Each of the at least two rows of connecting flow channels 5 is connected to the same main flow channel 2; in other words, there is only one main flow channel 2. In this embodiment, the outlet flow channel 3, valve chamber 4, connecting flow channel 5, and valve assembly 7 are arranged in two rows, symmetrically distributed on the left and right sides of the main flow channel 2. Only one main flow channel 2 needs to be opened on the manifold block 1, simplifying the overall structure of the combined valve. Moreover, with a smaller overall structural volume, more functions can be fulfilled, resulting in a high degree of integration for the combined valve.

[0092] Of course, in other embodiments, the two rows of liquid flow channels 3, valve chambers 4, connecting flow channels 5, and valve assemblies 7 can also be symmetrically arranged on the upper and lower sides of the main flow channel 2. In other words, the two rows of valve chambers 4, connecting flow channels 5, and valve assemblies 7 are symmetrically arranged at the top of the manifold block 1; or, the two rows of valve chambers 4, connecting flow channels 5, and valve assemblies 7 are symmetrically arranged at the bottom of the manifold block 1; or, the two rows of valve chambers 4, connecting flow channels 5, and valve assemblies 7 are symmetrically arranged at the bottom and top of the manifold block 1.

[0093] When the system is configured with two rows of liquid flow channels 3, valve chamber 4, connecting flow channel 5, and valve assembly 7, such as Figure 9 as well as Figure 12 As shown, the cover assembly 6 includes multiple housings 62, each housing 62 having at least two mounting cavities 61, thereby reducing the number of housings 62 and making the installation and removal of the combination valve more convenient.

[0094] like Figure 12 As shown, the mounting cavity 61 inside the housing 62 is simultaneously provided corresponding to the valve cavities 4 in the two rows at the top or bottom of the manifold block 1. Specifically, the corresponding arrangement means that the mounting cavity 61 is located directly above the valve cavity 4.

[0095] like Figure 14 As shown, the housing 62 is connected to the manifold block 1 by bolt assembly 9 (only the bolt mating hole is shown in the figure, the bolt structure is not shown). Specifically, the bolt can pass through the manifold block 1 and be threadedly connected to the housing 62, or the bolt can pass through the housing 62 and be threadedly connected to the manifold block 1.

[0096] Preferably, the housing 62 and the manifold block 1 are fixed at their four corners using bolt assemblies 9. This ensures that the main flow channel 2, valve chamber 4, and connecting flow channel 5 are located within the space enclosed by multiple bolt assemblies 9, reducing the distance between them and further improving the integration of the combined valve. In other words, the bolt assembly 9 avoids interference between itself and the main flow channel 2, valve chamber 4, and connecting flow channel 5, facilitating the fixing and installation of the housing 62 and manifold block 1 while reducing the overall size of the combined valve. Furthermore, this design prevents the bolt structure from being too close to the main flow channel 2 and connecting flow channel 5, which would result in thin walls in the main flow channel 2 and connecting flow channel 5, making them unable to withstand high fluid pressures.

[0097] When the housing 62 and manifold block 1 are fixed together using bolt assembly 9, since bolt assembly 9 is located on the periphery of main flow channel 2, valve chamber 4, and connecting flow channel 5, and the number of bolt assembly 9 is minimized, the connection pressure between housing 62 and manifold block 1 is concentrated near bolt assembly 9. This will cause uneven stress on the sealing part 71 of the diaphragm, thus causing the diaphragm 73 to have a sealing effect.

[0098] like Figure 12 as well as Figure 13 As shown, a support member 72 is provided between the housing 62 and the sealing part 71. The support member 72 surrounds the diaphragm 73 and is pressed on the sealing part 71. The pressure of the housing 62 is transmitted to the diaphragm 73 and the sealing part 71 through the support member 72, so as to ensure a stable and effective seal between the diaphragm 73, the sealing part 71 and the manifold block 1.

[0099] like Figure 13 As shown, the support member 72 further includes a bottom surface 721 opposite to the manifold block 1 and a pressing surface 722 abutting against the sealing part 71. The height between the bottom surface 721 and the pressing surface 722 of the support member 72 is H1. The height of the sealing part 71 in its natural, uncompressed state is defined as H2. The manifold block 1 is provided with a sealing groove 11 that mates with the sealing part 71. The height between the bottom of the sealing groove 11 and the top wall of the manifold block 1 is H3. Therefore, H1 + H2 > H3.

[0100] This configuration enables the sealing part 71 to be fully pressed before the bottom surface 721 contacts the top wall of the manifold block 1 when the bolt assembly 9 is installed on the housing 62 and the manifold block 1. This ensures that the sealing part 71 can fully fit with the manifold block 1 and guarantee the sealing effect between them.

[0101] To further prevent the flow rate of a connected flow channel 5 from decreasing as it approaches the inlet end 21 when all connected flow channels 5 are in operation, as shown in Embodiments 2, 3, and 4, the flow rate can be adjusted by changing the inclination angle of the connected flow channel 5, the diameter of the first end 51 of the connected flow channel, or by setting the main flow channel 2 to an inclined structure. This ensures a relatively balanced flow rate within each connected flow channel 5 and avoids excessive differences in flow rate among the connected flow channels 5.

[0102] Example 6

[0103] The difference from Example 5 is that:

[0104] like Figure 15 As shown, along the flow direction of the fluid in the main channel 2, the end-to-end distance between the first ends of the two connected channels 5 gradually decreases. Here, the distance between the centers of the first ends 51 of the two symmetrical connected channels 5 is defined as the end-to-end distance L. The end-to-end distance L of the connected channels 5 closer to the inlet end 21 is greater than that of the connected channels 5 farther from the inlet end 21. Near the inlet end 21 in the main channel 2, the fluid flow velocity is higher. Increasing the end-to-end distance L of the two connected channels 5 can prevent the fluids flowing into the two connected channels 5 from influencing each other and avoid the formation of eddies between the two connected channels 5 that would reduce the fluid flow rate entering the connected channels 5. This results in a relatively larger fluid flow rate distributed between the two connected channels 5, effectively preventing the problem of a smaller fluid flow rate in the connected channels 5 near the inlet end 21, and thus making the fluid flow rate in the connected channels 5 at different locations relatively balanced.

[0105] Example 7

[0106] The difference from Example 5 is that:

[0107] like Figure 16 As shown, along the fluid flow direction in the main channel 2, the first ends 51 of the connecting channels 5 in different columns are staggered and arranged. In other words, the first ends 51 of the connecting channels 5 in different columns are not located in the same diameter direction of the main channel 2.

[0108] If the first ends 51 of the connecting channels 5 in different columns are relatively close, eddies are easily generated between the two connecting channels 5, which reduces the flow rate of the fluid entering the connecting channel 5. However, by setting the first ends 51 of the connecting channels 5 in different columns to be staggered, the spacing between the first ends 51 of the connecting channels 5 in different columns can be increased, avoiding mutual interference between the connecting channels 5 that would reduce the flow rate inside the connecting channel 5.

[0109] At the same time, the staggered arrangement of the first ends 51 of the connecting channels 5 in different columns can also reduce the impact of water hammer effect on the fluid flow rate in the connecting channels 5 connected to the other valve chambers 4 when one of the valve components 7 is closed.

[0110] The above specific embodiments are used to explain and illustrate the present utility model, and are not intended to limit the present utility model. Any modifications and changes made to the present utility model within the spirit and scope of the claims shall fall within the protection scope of the present utility model.

Claims

1. A combination valve, comprising: a manifold block provided with a main flow channel, an outlet flow channel, a plurality of valve cavities between the main flow channel and the outlet flow channel, and a plurality of communication flow channels for respectively connecting the main flow channel and the valve cavities; a cover assembly mounted on the manifold block, and having a plurality of mounting cavities formed in the cover assembly and corresponding to the valve cavities; a valve assembly arranged between the mounting cavities and the valve cavities, and capable of controlling the opening and closing of the valve cavities and the communication flow channels; a driving assembly arranged in the mounting cavities and connected to the valve assembly to drive the valve assembly to move; characterized in that: the communication flow channels have first ends connected to the main flow channel and second ends connected to the valve cavities, and the main flow channel has an inlet end; at least one of the communication flow channels is arranged to be inclined, and the second end of the inclined communication flow channel is located on the side of the first end away from the inlet end along the flow direction of the fluid in the main flow channel.

2. The combination valve of claim 1, wherein: The number of inclined communication flow channels is two or more, and the angle between the central axis of the inclined communication flow channel and the central axis of the main flow channel gradually increases along the flow direction of the fluid in the main flow channel.

3. The combination valve of claim 1, wherein: In adjacent communication flow channels, the diameter of the first end of the communication flow channel close to the inlet end is greater than the diameter of the first end of the communication flow channel away from the inlet end.

4. The combination valve of claim 1, wherein: The bottoms of the plurality of valve cavities are at the same height, the main flow channel is arranged below the height of the bottoms of the valve cavities, and the distance between the central axis of the main flow channel and the bottoms of the valve cavities gradually increases along the flow direction of the fluid in the main flow channel.

5. The combination valve of claim 1, wherein: The central axis of the communication flow channel intersects the central axis of the main flow channel.

6. The combination valve of any one of claims 1-5, wherein: The outlet flow channel, the valve cavities, the communication flow channels, and the valve assembly are arranged in at least two rows, and the number of the main flow channels is one, which is arranged to communicate with the at least two rows of communication flow channels.

7. The combination valve of claim 6, wherein: The manifold block is symmetrically provided with two rows of valve cavities, communication flow channels, and valve assemblies at the top end and / or the bottom end, and the first end-to-end distance of the two rows of communication flow channels gradually decreases along the flow direction of the fluid in the main flow channel.

8. The combination valve of claim 6, wherein: The first ends of the communication flow channels of different rows are staggered along the flow direction of the fluid in the main flow channel.

9. The combination valve of claim 7, wherein, The cover assembly comprises a plurality of housings, and each of the housings is provided with at least two mounting cavities.

10. The combination valve of claim 9, wherein, The mounting cavities in the housings are arranged to correspond to the two rows of valve cavities at the top end or the bottom end of the manifold block; The housings are connected to the manifold block by bolt assemblies, and the bolt assemblies are located on the outer circumferential side of the mounting cavities and the valve cavities, so that the main flow channel, the valve cavities, and the communication flow channels are located in the space surrounded by the bolt assemblies.

11. The combination valve of claim 10, wherein: The valve assembly comprises a sealing part matched with the manifold block, a support arranged between the housing and the sealing part, and the housing presses the sealing part against the manifold block through the support; The support has a bottom surface opposite to the manifold block and a pressing surface abutting against the sealing part, and the height between the two surfaces is H1, the height of the sealing part when it is not compressed is H2, the manifold block is provided with a sealing groove matched with the sealing part, and the height between the bottom of the sealing groove and the top wall of the manifold block is H3, wherein H1+H2>H3.

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