Combination valve

Abstract

The utility model relates to a combination valve which comprises a manifold block. The flow channel is arranged in the manifold block; the cylinder body is fixed on the manifold block, a valve cavity is formed between the cylinder body and the manifold block, and the valve cavity is communicated with the flow channel; the valve core is arranged in the valve cavity; the driving assembly is arranged in the cylinder body, and the driving assembly is fixedly connected with the valve element; the flow channel comprises a first liquid inlet flow channel, a second liquid inlet flow channel and a liquid outlet flow channel; the valve cavity comprises a first valve cavity and a second valve cavity; wherein the first liquid inlet flow channel is communicated with the first valve cavity, the second liquid inlet flow channel is communicated with the second valve cavity, and the second valve cavity is communicated with the liquid outlet channel; a communicating channel is arranged between the first valve cavity and the second valve cavity; a one-way valve assembly is arranged between the first liquid inlet flow channel and the first valve cavity. And / or a one-way valve assembly is arranged between the second liquid inlet flow channel and the second valve cavity; and the valve bodies of the cleaning liquid and the slurry are integrated, so that the size of the valve bodies is reduced, the overall design is optimized, and stable operation of the valve bodies is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering, in particular to a combined valve. Background Art

[0002] As a fluid separation device, the filter is used to control impurities generated in the industrial production process. Usually, the filter is used in conjunction with the fluid pipeline, and the valve body is also used in conjunction with the fluid pipeline. Due to the impurity filtering process, impurities are easily retained inside the fluid pipeline during use, and then the inside of the fluid pipeline needs to be cleaned regularly.

[0003] Most of the valve bodies currently involved are of the one-in-one-out type, that is, the slurry and the cleaning fluid share one channel; therefore, when the fluid pipeline needs to be cleaned, the port connected to the valve body needs to be frequently replaced; to solve this problem, the existing technology has also made corresponding optimization improvements, such as a combination valve with multiple channels, but in actual use, the volume size of the combination valve is large, resulting in limited usage scenarios, and based on the multi-channel design, different fluids are easily mixed during the circulation process, which in turn causes inconvenience in use. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a combination valve, which solves the problem that the existing combination valve is too large in size.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A combination valve comprises: a manifold block; a flow channel arranged inside the manifold block; a cylinder body fixed on the manifold block and forming a valve cavity between the cylinder body and the manifold block, wherein the valve cavity is connected to the flow channel; a valve core arranged inside the valve cavity and capable of controlling the opening and closing of the valve cavity and the flow channel; a drive assembly arranged inside the cylinder body, wherein the drive assembly is fixedly connected to the valve core and is used to drive the valve core to reciprocate; the flow channel comprises a first liquid inlet flow channel, a second liquid inlet flow channel and a liquid outlet flow channel; the valve cavity comprises a first valve cavity and a second valve cavity; wherein the first inlet The liquid flow channel is connected to the first valve cavity, the second liquid inlet flow channel is connected to the second valve cavity, and the second valve cavity is connected to the liquid outlet channel; a connecting channel is provided between the first valve cavity and the second valve cavity to connect the two; a one-way valve assembly is provided between the first liquid inlet flow channel and the first valve cavity to prevent the fluid inside the first valve cavity from flowing back into the first liquid inlet flow channel; and / or a one-way valve assembly is provided between the second liquid inlet flow channel and the second valve cavity to prevent the fluid inside the second valve cavity from flowing back into the second liquid inlet flow channel.

[0007] The combined valve involved in the utility model divides the valve cavity into a first valve cavity and a second valve cavity, and a first liquid inlet channel is connected to the first valve cavity, and a second liquid inlet channel is connected to the second valve cavity. The first liquid inlet channel cooperates with the first valve cavity, and the second liquid inlet channel cooperates with the second valve cavity to control the delivery of different fluids, and the structure is integrated on a manifold block, which can realize a smaller volume of the valve body itself. At the same time, the setting of the connecting channel can realize that the valve body only needs one liquid outlet channel, so that the device has only one liquid outlet connector, thereby reducing the number of liquid outlet connectors and reducing the volume occupied by the valve body when installed. At the same time, in the valve body, by controlling the opening and closing of the first valve cavity and the second valve cavity, the valve body can be applied to different occasions, and the valve body can be used as a multi-functional valve. For example, the valve body can be used as a material conveying and cleaning combination valve, one of the first liquid inlet flow channel and the second liquid inlet flow channel conveys material, and the other conveys cleaning liquid. By controlling the communication between different valve chambers and flow channels, it is possible to convey materials and cleaning liquid separately; similarly, the valve body can also be used as a mixing valve, and the first liquid inlet flow channel and the second liquid inlet flow channel can convey two different materials and slurries respectively, so that when conveying two materials at the same time, the two materials are mixed in the second valve chamber. At the same time, a one-way valve assembly is also provided between the first liquid inlet flow channel and the first valve chamber, and the one-way valve assembly only allows the fluid to flow into the first valve chamber through the first liquid inlet flow channel; or a one-way valve assembly is provided between the second liquid inlet flow channel and the second valve chamber, and the one-way valve assembly only allows the fluid to flow into the second valve chamber through the second liquid inlet flow channel; or a one-way valve assembly is provided between the first liquid inlet flow channel and the first valve chamber, and a one-way valve assembly is provided between the second liquid inlet flow channel and the second valve chamber, to ensure that the liquid in the first valve chamber will not flow back into the first liquid inlet flow channel, and the liquid in the second valve chamber will not flow back into the second liquid inlet flow channel. Especially in this valve body, the output ends of the first valve chamber and the second valve chamber are extremely close. When the valve core seal is abnormal, it is very easy for the first liquid inlet channel, the second liquid inlet channel and the liquid inside them to be contaminated. The above-mentioned one-way valve assembly can effectively ensure the long-term and stable movement of the valve body by preventing the backflow of the liquid.

[0008] It is understandable that the cross-sectional area of ​​the first liquid inlet flow channel is larger than the cross-sectional area of ​​the connecting channel, so that the liquid in the first liquid inlet flow channel will flow faster than the liquid in the first liquid inlet flow channel when passing through the connecting channel. When the first liquid inlet flow channel conveys the cleaning liquid, the cleaning liquid will enter the second valve cavity at a faster speed to achieve better cleaning of the second valve cavity itself; when the first liquid inlet flow channel conveys the slurry, it can be achieved that the slurry is less likely to crystallize inside the first valve cavity or the slurry inside the first valve cavity is more fully mixed with the liquid conveyed by the second liquid inlet flow channel.

[0009] Preferably, the bottom end of the communication channel is higher than the abutment portion where the valve seat of the second valve cavity abuts against the valve core.

[0010] In this arrangement, the bottom end of the communicating channel is higher than the abutment of the second valve chamber valve seat, so that a height misalignment is formed between the bottom end of the communicating channel and the abutment of the second valve chamber valve seat, so that the fluid flowing through the communicating channel can avoid the sealing abutment between the valve core and the second valve chamber, avoiding the impact of high-flow fluid on the sealing abutment between the valve core and the second valve chamber, thereby reducing the wear of the fluid on the sealing abutment between the valve core and the second valve chamber.

[0011] Preferably, the one-way valve assembly comprises a one-way valve chamber and a sealing member, the one-way valve chamber is provided in the manifold block, the one-way valve chamber inlet is communicated with the flow channel, and the one-way valve chamber outlet is communicated with the valve chamber;

[0012] When the one-way valve cavity outlet pressure is greater than the one-way valve cavity inlet pressure, the sealing member will close the one-way valve cavity inlet.

[0013] It can be understood that the sealing member can prevent the liquid from flowing back in the one-way valve chamber, thereby causing contamination to the liquid inside the first liquid inlet channel or the second liquid inlet channel; at the same time, the one-way valve chamber is arranged in the manifold block, which can achieve a more integrated and miniaturized structure, thereby achieving a smaller volume occupied by the device compared to the structure of adding an additional one-way valve.

[0014] Preferably, the manifold block includes a first block and a second block, and the one-way valve chamber includes an upper chamber provided on the first block and a lower chamber provided on the second block;

[0015] The one-way valve cavity outlet is arranged on the inner wall of the upper cavity, and the one-way valve cavity inlet is arranged on the inner wall of the lower cavity.

[0016] It can be understood that the arrangement of the first block and the second block facilitates the actual processing and forming of the one-way valve cavity, and the arrangement of the one-way valve cavity consisting of a two-part structure enables the sealing member to be conveniently installed inside the one-way valve cavity.

[0017] Preferably, one of the first block and the second block is provided with an annular protrusion, and the other is provided with an annular groove, and the annular protrusion and the annular groove both surround the outside of the one-way valve cavity.

[0018] The annular protrusion can be inserted into the annular groove with interference fit to improve the sealing performance at the connection between the upper cavity and the lower cavity.

[0019] It can be understood that the cooperation between the annular protrusion and the annular groove can ensure the sealing performance between the first block and the second block, and avoid leakage in the one-way valve chamber; at the same time, the cooperation between the annular protrusion and the annular groove can also play a certain positioning role, so that when the first block and the second block are installed, they can be better aligned to avoid deviation in position. When the annular protrusion is set on the first block, the annular groove is set on the second block, and the annular protrusion on the first block is inserted into the annular groove on the second block through interference to ensure the sealing of the connection between the first block and the second block; when the annular protrusion is set on the second block, the annular groove is set on the first block head, and the annular protrusion on the second block is inserted into the annular groove on the first block through interference to ensure the sealing of the connection between the first block and the second block.

[0020] Preferably, one of the first block and the second block is provided with a positioning protrusion, and the other is provided with a positioning groove;

[0021] When the annular protrusion is inserted into the annular groove, the positioning protrusion can be inserted into the annular groove at the same time to achieve positioning of the first block and the second block.

[0022] It is understandable that when only the above-mentioned annular protrusion and annular groove exist, the first block and the second block can still rotate around the central axis of the above-mentioned annular protrusion. After the positioning protrusion and the positioning groove are provided, the cooperation between the positioning protrusion and the positioning groove and the cooperation between the annular protrusion and the annular groove will jointly complete the positioning of the first block and the second block, so as to achieve more accurate alignment between the first block and the second block, so as to facilitate subsequent installation. At the same time, when the positioning protrusion is provided on the first block, the positioning groove is provided on the second block; when the positioning protrusion is provided on the second block, the positioning groove is provided on the first block. Among them, only one positioning protrusion and one positioning groove can be provided, but multiple positioning protrusions and positioning grooves can also be provided.

[0023] Preferably, the sealing member comprises a spring, and the top end of the spring is disposed against the top wall of the upper cavity;

[0024] The cavity height of the upper cavity is H, the maximum length of the spring inside the one-way valve cavity is L, and H / L≥0.8.

[0025] It is understandable that during the installation of the spring, if the length of the spring exposed in the upper cavity is too large, the exposed part of the spring is prone to bending due to uneven force when the first block and the second block are installed, thus affecting the performance of the subsequent one-way valve. When H / L ≥ 0.8, the part of the spring exposed outside the upper cavity is small, and the side bending is not easy to occur even if the spring is compressed.

[0026] Preferably, an annular recess is provided at the bottom end of the valve core, the annular recess has an inner wall inclined inwardly and an outer wall inclined outwardly, an annular chamfer is provided on the valve cavity valve seat, and an annular channel is formed between the annular chamfer and the inner wall of the annular recess.

[0027] It can be understood that, through the above-mentioned annular channel, when the valve body is opened, the liquid can be guided by the annular channel and the outer wall of the annular recess to flush the area where the valve seat and the valve core abut each other, so as to ensure that the impurities or crystals therein leave the valve cavity together with the flow of liquid, or the impurities or crystals are flushed away from the area where the valve seat and the valve core abut each other under the flushing action of the liquid, so as to avoid the situation where the valve seat and the valve core are easily sealed and caused by structural wear due to impurities or crystals. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 Schematic diagram of the external structure of the combination valve in the first embodiment;

[0030] Figure 2 This is a schematic diagram of the internal structure of the combination valve in Example 1;

[0031] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0032] Figure 4 for Figure 2 The enlarged structural diagram at B in the middle;

[0033] Figure 5 This is a schematic diagram of the explosion structure of the combination valve in Example 1;

[0034] Figure 6 This is a schematic diagram of the bottom structure of the first block in Example 1;

[0035] Figure 7 This is a schematic diagram of the internal structure of the combination valve in the second embodiment;

[0036] Figure 8 This is a schematic diagram of the internal structure of the combination valve in Example 3;

[0037] Fig. 9 Schematic diagram of the internal structure of the combination valve in the fourth embodiment.

[0038] Description of Reference Numerals

[0039] 1. Manifold block; 11. First block; 12. Second block; 13. Annular protrusion; 14. Annular groove; 15. Positioning protrusion; 16. Positioning groove; 2. Cylinder body; 3. Valve core; 31. Annular recess; 4. Drive assembly; 41. Piston chamber; 42. Piston; 43. Connecting shaft; 44. Rotating sleeve, 45. Knob; 5. Flow channel; 51. First liquid inlet flow channel; 52. Second liquid inlet flow channel; 53. Liquid outlet flow channel; 54. Connecting channel; 6. First valve chamber; 7. Second valve chamber; 8. One-way valve assembly; 81. One-way valve chamber; 811. Upper chamber; 812. Lower chamber; 82. Spring; 83. Baffle plate; 9. Annular channel. DETAILED DESCRIPTION

[0040] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Embodiment 1

[0044] The combined valve of the utility model embodiment is as follows Figure 1 and Figure 2As shown, it includes a manifold block 1, in which a flow channel 5 is arranged; a cylinder body 2, which is installed in cooperation with the manifold block 1 and forms a valve cavity between the cylinder body 2 and the manifold block 1, and the valve cavity is used to provide an operation control space for the valve body, and the valve cavity is connected to the flow channel 5; a valve core 3 is arranged inside the valve cavity, and the valve core 3 can be movably cooperated in the valve cavity to realize the connection or blocking control between the valve cavity and the flow channel 5, thereby realizing the circulation and transportation control of the slurry or cleaning liquid; in order to facilitate the movable adjustment of the valve core 3, the valve body is also provided with a driving component 4, and the driving component 4 is arranged inside the cylinder body 2, and the output end of the driving component 4 is fixedly connected to the valve core 3, which is used to provide a driving force to the valve core 3, so as to link the valve core 3 to reciprocate in the valve cavity, thereby realizing automatic control of the connection or blocking between the valve cavity and the flow channel 5.

[0045] Reference Figure 2 The driving component 4 is a pneumatic adjustment structure, specifically including a piston chamber 41 and a piston 42 arranged inside the cylinder body 2. The piston chamber 41 is provided with an air hole for changing the internal air pressure. By changing the air pressure inside the piston chamber 41, the piston 42 can slide inside the piston chamber 41, and the piston 42 is fixedly connected to the valve core 3 to drive the valve core 3 to move up and down.

[0046] Specifically, the flow channel 5 includes a first liquid inlet flow channel 51, a second liquid inlet flow channel 52 and a liquid outlet flow channel 53. It can be understood that in order to facilitate the connection or blocking control of the first liquid inlet flow channel 51 and the second liquid inlet flow channel 52, two cylinder bodies 2 are provided on the manifold block 1, and a first valve chamber 6 connected to the first liquid inlet flow channel 51 and a second valve chamber 7 connected to the second liquid inlet flow channel 52 are formed, and valve cores 3 are provided in the first valve chamber 6 and the second valve chamber 7, and drive components 4 connected to the valve cores 3 are provided inside the two cylinder bodies 2.

[0047] Then, under the cooperation of the driving assembly 4 and the valve core 3, the first liquid inlet channel 51 and the first valve chamber 6 can be controlled to be connected or blocked, or the second liquid inlet channel 52 and the second valve chamber 7 can be controlled to be connected or blocked. The liquid outlet channel 53 is connected to the second valve chamber 7; it can be understood that, in order to facilitate the discharge of liquid, a connecting channel 54 is also provided between the first valve chamber 6 and the second valve chamber 7, so that the first valve chamber 6 and the second valve chamber 7 can be connected to each other, and the liquid flowing through the first liquid inlet channel 51 or the second liquid inlet channel 52 is discharged from the liquid outlet channel 53, so that the structure only needs one liquid outlet to discharge the liquid flowing through the two liquid inlet channels 5, and only one liquid discharge pipe is needed to be connected to the liquid outlet channel 53 during installation, so that this design can ensure that the space occupied by the actual installation is smaller.

[0048] It is understandable that the above-mentioned cylinder body 2 can also be provided with one, and two valve chambers are formed between the one cylinder body 2 and the manifold block 1, and the cylinder body 2 is provided with a driving assembly 4 corresponding to the two valve chambers respectively.

[0049] Specifically, refer to Figure 2 as well as Figure 3 A one-way valve assembly 8 is also arranged between the second liquid inlet channel 52 and the second valve chamber 7, and the one-way valve assembly 8 only allows the fluid in the first liquid inlet channel 51 to flow into the first valve chamber 6, effectively avoiding the backflow of the fluid in the first valve chamber 6 and providing a guarantee for the stable operation of the valve body.

[0050] like Figure 3 As shown, the one-way valve assembly 8 includes a one-way valve chamber 81 and a sealing member. The one-way valve chamber 81 is provided in the manifold block 1, and the inlet of the one-way valve chamber 81 is connected to the flow channel, and the outlet of the one-way valve chamber 81 is connected to the valve chamber; when the outlet pressure of the one-way valve chamber 81 is greater than the inlet pressure of the one-way valve chamber 81, the sealing member will close the inlet of the one-way valve chamber 81. The one-way valve chamber 81 is provided in the manifold block 1, thereby achieving a higher degree of structural integration. On the premise of ensuring that the liquid in the valve chamber does not flow back into the liquid inlet flow channel, there is no need to connect an additional separate one-way valve in the liquid inlet flow channel, thereby achieving a smaller actual volume of the valve body.

[0051] The sealing member includes a spring 82 and a sealing plate 83 . One end of the spring 82 abuts against the inner wall of the one-way valve cavity 81 , and the other end applies a force to the sealing plate 83 so that the sealing plate 83 closes the one-way valve cavity 81 .

[0052] If the liquid conveyed in the valve body is corrosive or has a high requirement for cleanliness, the spring 82 can be made of a material with high corrosion resistance and high cleanliness, such as resin.

[0053] It is understandable that the sealing member structure can also be: the center of the bottom wall of the one-way valve cavity 81 is the inlet of the one-way valve cavity 81, in which case the bottom wall of the one-way valve cavity 81 can be a frustum structure, and the sealing member includes a spring 82 and a sealing ball, and the spring 82 presses the sealing ball toward the bottom wall of the one-way valve cavity 81; and if the valve body is in normal use, the one-way valve cavity 81 is vertically arranged, and the sealing member can also not contain the spring 82 structure, and the sealing ball cooperates with the bottom wall of the one-way valve cavity 81 through its own gravity to achieve the effect of one-way flow of liquid. Of course, in this case, the density of the sealing ball is greater than the density of the liquid. Of course, the sealing member can also be other applicable structures.

[0054] Specifically, the manifold block 1 is formed by assembling the first block 11 and the second block 12, and the one-way valve chamber 81 includes an upper chamber 811 and a lower chamber 812; further, the upper chamber 811 is arranged on the first block 11, and the lower chamber 812 is arranged on the second block 12, and then the top end of the upper chamber 811 arranged on the first block 11 is connected with the second valve chamber 7, that is, the outlet of the one-way valve chamber 81; the bottom end of the lower chamber 812 arranged on the second block 12 is connected with the second liquid inlet channel 52, that is, the inlet of the one-way valve chamber 81. The one-way valve chamber 81 is formed by assembling the first block 11 and the second block 12 to connect and combine the upper chamber 811 and the lower chamber 812, and the one-way valve chamber 81 is separated by disassembling the first block 11 and the second block 12 to form the upper chamber 811 and the lower chamber 812.

[0055] By providing the first block 11 and the second block 12 , the structure of the one-way valve chamber 81 can be more conveniently processed and formed during the actual processing, thereby reducing the actual processing difficulty and the installation difficulty of the sealing component.

[0056] Among them, the sealing plate 83 is arranged in the lower cavity 812 and abuts against the bottom end of the lower cavity 812 and the connection with the second liquid inlet channel 52. One end of the spring 82 abuts against the top wall of the upper cavity 811, and the other end abuts against the sealing plate 83.

[0057] Of course, it is conceivable that, relative to Figure 3 The middle one-way valve chamber 81 is in a vertical arrangement, and the one-way valve chamber 81 can also be in a horizontal arrangement or in an inclined arrangement.

[0058] Further, refer to Figure 3 , the cavity height of the upper cavity 811 is H, and the maximum length of the spring 82 inside the one-way valve cavity 81 is L, wherein H / L≥0.8.

[0059] In the process of installing the spring 82, if the length of the spring 82 exposed outside the upper cavity 811 is too long, when the first block 11 and the second block 12 are installed, the exposed part of the spring 82 is prone to bend on the side of the spring 82 due to uneven force, thereby affecting the performance of the subsequent one-way valve assembly 8. When H / L≥, the part of the spring 82 exposed outside the upper cavity is small, and the side of the spring 82 is not prone to bend even if the spring 82 is compressed.

[0060] In the above description, the maximum length L of the spring 82 is: when the spring 82 abuts against the top wall of the one-way valve chamber 81, and the bottom end of the blocking member 83 abuts against the bottom wall of the one-way valve chamber 81, the length of the spring 82 is L. For details, refer to Figure 3 .

[0061] Specifically, refer to Figure 2 , Figure 3 , Figure 5 as well as Figure 6 , an annular protrusion 13 is provided on one of the first block 11 and the second block 12, and an annular groove 14 is provided at a position corresponding to the annular protrusion 13 on the other block. If the annular protrusion 13 is provided on the side of the first block 11 facing the second block 12 around the outer periphery of the upper cavity 811, the annular groove 14 is provided on the second block 12 corresponding to the position of the annular protrusion 13 around the outer periphery of the lower cavity 812, or the annular protrusion 13 is provided on the side of the second block 12 facing the first block 11 around the outer periphery of the lower cavity 812, and the annular groove 14 is provided on the first block 11 corresponding to the position of the annular protrusion 13 around the outer periphery of the upper cavity 811; based on the connection and cooperation between the annular protrusion 13 and the annular groove 14, the tightness of the connection between the first block 11 and the second block 12 can be improved, and based on the setting positions of the annular protrusion 13 and the annular groove 14, a layer of partition can be formed on the outer periphery of the upper valve cavity and the lower valve cavity, thereby further improving the sealing performance of the upper valve cavity and the lower valve cavity. At the same time, the cooperation between the annular protrusion 13 and the annular groove 14 can also play a positioning role, so that the first block 11 and the second block 12 can be accurately positioned when they are assembled.

[0062] Furthermore, a positioning protrusion 15 is provided on one of the first block 11 and the second block 12, and correspondingly, a positioning groove 16 is provided at the position corresponding to the other protrusion; if the positioning protrusion 15 is provided on the side of the first block 11 facing the second block 12, the positioning groove 16 is provided on the second block 12 corresponding to the position of the positioning protrusion 15, or the positioning protrusion 15 is provided on the side of the second block 12 facing the first block 11, and the positioning groove 16 is provided on the first block 11 corresponding to the position of the positioning protrusion 15. Through the cooperation between the positioning protrusion 15 and the positioning groove 16, the assembly positioning between the first block 11 and the second block 12 can be achieved; and based on the cooperation between the annular protrusion 13 and the annular groove 14, a double positioning effect can be achieved.

[0063] The assembly accuracy of the first block 11 and the second block 12 is further improved, which not only significantly improves the assembly efficiency, but also avoids the misalignment of the first block 11 and the second block 12 during the assembly process.

[0064] In addition, the above-mentioned positioning protrusion and positioning groove 16 can be provided with one or more. When the positioning protrusion and positioning groove 16 are provided with more than one, the multiple positioning protrusions and the multiple positioning grooves 16 can be provided in a one-to-one matching manner.

[0065] The following is an explanation of the use of the valve body:

[0066] The valve body is used as a combined infusion cleaning valve, and the liquid flowing through the first liquid inlet channel 51 is slurry, and the liquid flowing through the second liquid inlet channel 52 is cleaning liquid. When in use, the first valve cavity 6 is in an open state, and the second valve cavity 7 is in a closed state. At this time, the slurry will enter the first valve cavity 6 from the first liquid inlet channel 51, and enter the second valve cavity 7 through the connecting channel 54, and finally be discharged from the liquid outlet channel 53; when cleaning, the first valve cavity 6 is in a closed state, and the second valve cavity 7 is in an open state, and the cleaning liquid will enter the second valve cavity 7 from the second liquid inlet channel 52, and finally be discharged from the liquid outlet channel 53, and the pipeline on the downstream side of the liquid outlet channel 53 is cleaned.

[0067] The valve body is used as a combined infusion cleaning valve, and the liquid flowing through the first liquid inlet channel 51 is a cleaning liquid, and the liquid flowing through the second liquid inlet channel 52 is a slurry. When in use, the first valve chamber 6 is in a closed state, and the second valve chamber 7 is in an open state. At this time, the slurry will enter the second valve chamber 7 from the second liquid inlet channel 52, and be discharged through the liquid outlet channel 53, so as to realize the transportation of the slurry to the downstream pipeline; when cleaning, the first valve chamber 6 is in an open state, and the second valve chamber 7 is in a closed state. At this time, the cleaning liquid will enter the first valve chamber 6 from the first liquid inlet channel 51, and then flow through the connecting channel 54 into the second valve chamber 7, and finally be discharged from the liquid outlet channel 53, so as to realize the transportation of the cleaning liquid to the pipeline on the downstream side of the liquid outlet channel 53, and to clean it.

[0068] When the valve body is used as a mixing valve, the first valve chamber 6 and the second valve chamber 7 are both in an open state, at which time the first liquid transported by the first liquid inlet channel 51 will enter the second valve chamber 7 through the first valve chamber 6 and the connecting channel 54, and the second liquid transported by the second liquid inlet channel 52 will enter the second valve chamber 7, so that the first liquid and the second liquid will be mixed in the second valve chamber 7.

[0069] It should be noted that in the above three usage situations, the opening and closing of the first valve cavity 6 / the second valve cavity 7 refers to the cooperation between the valve core 3 and the valve seat inside the valve cavity to realize the opening or closing of the valve seat.

[0070] It should be noted that the slurry may be a liquid containing solid particles such as a polishing liquid, or may be other liquids without a solid shell.

[0071] It is worth noting that after the slurry is output through the slurry equipment, if there is a backflow or reverse flow, the slurry equipment will be blocked or damaged, and the valve body seal for conveying the slurry is more susceptible to damage, that is, the valve body that controls the on and off of the slurry is more susceptible to sealing failure, and thus more susceptible to backflow or reverse flow. Therefore, when one of the first liquid inlet channel 51 and the second liquid inlet channel 52 is selected as the slurry inlet channel, the other is the cleaning liquid inlet channel, and the one-way valve assembly 8 is correspondingly arranged in the slurry inlet channel. As in this embodiment, it is preferred that the second liquid inlet channel 52 is the slurry inlet channel, and the first liquid inlet channel 51 is the cleaning liquid inlet channel; accordingly, the one-way valve assembly 8 is arranged in the second liquid inlet channel 52 to prevent the slurry from flowing back through the second liquid inlet channel 52 into the second valve chamber 7.

[0072] Furthermore, refer to Figure 2 , the cross-sectional area of ​​the first liquid inlet flow channel 51 is set to be larger than the cross-sectional area of ​​the connecting channel 54. It can be understood that the cross-sectional area of ​​the first liquid inlet flow channel 51 is larger than the cross-sectional area of ​​the connecting channel 54, and then when the fluid enters the connecting channel 54 through the first liquid inlet flow channel 51, the flow rate of the fluid will increase.

[0073] In this embodiment, if the first liquid inlet channel 51 is conveying cleaning liquid, the cleaning liquid will enter the second valve chamber 7 at a faster speed, thereby achieving a better cleaning effect on the second valve chamber 7 itself; if the first liquid inlet channel 51 is conveying slurry, it will enter the second valve chamber 7 at a faster speed, which can make the slurry less likely to crystallize and settle in the second valve chamber 7, thereby avoiding the situation where a large amount of crystals or sediments appear in the second valve chamber 7, causing the valve core 3 in the second valve chamber 7 to be easily worn; if the valve body is used as a mixing valve, the liquid enters the second valve chamber 7 faster, and due to factors such as impacting the valve core 3 in the second valve chamber 7, a stronger turbulence will be generated in the second valve chamber 7, thereby achieving a better liquid mixing effect in the second valve chamber 7.

[0074] Specifically, since the flow velocity of the cleaning fluid will be significantly increased when flowing through the connecting channel 54, it will then cause an impact on the second valve chamber 7 downstream of the connecting channel 54, especially the sealing surface position between the valve seat of the second valve chamber 7 and the valve core 3 in the second valve chamber 7; then the bottom end of the connecting channel 54 toward the second valve chamber 7 is higher than the abutment between the valve seat of the second valve chamber 7 and the valve core 3, so that the bottom end of the connecting channel 54 toward the second valve chamber 7 is misaligned with the abutment between the valve seat of the second valve chamber 7, thereby avoiding the impact of the cleaning fluid; thereby reducing the impact and wear of the cleaning fluid on the sealing abutment between the valve core 3 and the second valve chamber 7.

[0075] like Figure 4As shown, an annular recess 31 is also provided at the bottom end of the valve core 3. The annular recess 31 has an inner side wall inclined inwardly and an outer side wall inclined outwardly. An annular chamfer is provided on the valve cavity valve seat, and an annular channel 9 is formed between the annular chamfer and the inner side wall of the annular recess 31. When the valve body changes from a closed state to an open state, when the valve body opening is small, the liquid will enter the annular recess 31 along the annular channel 9, and flow toward the valve seat under the guidance of the outer side wall of the annular recess 31. Therefore, when there are crystals or particles in the area or vicinity of the valve seat abutting against the valve core 3, the crystals or particles will be washed away by the fluid, so as to avoid the crystals affecting the sealing between the valve core 3 and the valve seat or causing the abutment wear between the two to intensify.

[0076] When the valve body opening is small, the cross-sectional area of ​​the liquid passing through the annular channel 9 is larger than the cross-sectional area of ​​the liquid passing through the junction of the valve seat and the valve core 3, thereby avoiding excessive pressure drop after the liquid enters the annular recess 31, resulting in a slow flow rate of the liquid passing through the sealing portion between the valve seat and the valve core 3, which in turn makes it difficult to effectively flush and clean the crystals or particles on the valve seat.

[0077] Embodiment 2

[0078] The difference from the first embodiment is that:

[0079] Reference Figure 7 The one-way valve assembly 8 is arranged between the first liquid inlet channel 51 and the first valve chamber 6, and the one-way valve assembly 8 only allows the fluid in the first liquid inlet channel 51 to flow into the first valve chamber 6, which can effectively prevent the fluid in the first valve chamber 6 from flowing back.

[0080] In this embodiment, if the valve body is used as a liquid infusion and cleaning combination valve, the slurry is preferably transported through the first liquid inlet channel 51 and the cleaning liquid is preferably transported through the second liquid inlet channel 52 .

[0081] Embodiment 3

[0082] The difference from the first embodiment is that:

[0083] Reference Figure 8 A one-way valve assembly 8 is provided between the first liquid inlet channel 51 and the first valve chamber 6 , and a one-way valve assembly 8 is also provided between the second liquid inlet channel 52 and the second valve chamber 7 to prevent backflow of liquid inside the first valve chamber 6 and the second valve chamber 7 .

[0084] In this embodiment, the valve body is more suitable for use as a mixing valve.

[0085] Embodiment 4

[0086] The difference between any one of the first to third embodiments is that:

[0087] The driving assembly 4 is a manual adjustment structure or an electric adjustment structure.

[0088] When it is a manual adjustment structure, one of the structures can refer to Fig. 9 Specifically, it includes a connecting shaft 43, a rotating sleeve 44 and a knob 45. The connecting shaft 43 is fixedly connected to the valve core 3 and can rotate relative to the cylinder body 2; the rotating sleeve 44 can only rotate relative to the cylinder body 2 and is threadedly connected to the connecting shaft 43; the knob 45 and the rotating sleeve 44 are circumferentially limited.

[0089] When in use, the knob 45 drives the rotating sleeve 44 to rotate, and the rotating sleeve 44 will realize the up and down movement of the connecting shaft 43 through the threaded structure, thereby realizing the connecting shaft 43 driving the valve core 3 to move up and down, thereby realizing the change of the opening and closing state of the valve body.

[0090] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A combination valve, comprising: Manifold blocks; a flow channel disposed inside the manifold block; The cylinder body is fixed on the manifold block and a valve cavity is formed between the cylinder body and the manifold block, wherein the valve cavity is communicated with the flow channel; The valve core is arranged inside the valve cavity and can control the opening and closing of the valve cavity and the flow channel; A driving assembly, used to drive the valve core to reciprocate; It is characterized in that The flow channel comprises a first liquid inlet flow channel, a second liquid inlet flow channel and a liquid outlet flow channel; The valve cavity comprises a first valve cavity and a second valve cavity; Wherein, the first liquid inlet channel is connected to the first valve cavity, the second liquid inlet channel is connected to the second valve cavity, and the second valve cavity is connected to the liquid outlet channel; A communication channel is provided between the first valve cavity and the second valve cavity for connecting the two; A one-way valve assembly is provided between the first liquid inlet flow channel and the first valve cavity to prevent the fluid inside the first valve cavity from flowing back into the first liquid inlet flow channel; And / or, a one-way valve assembly is provided between the second liquid inlet channel and the second valve chamber to prevent the fluid inside the second valve chamber from flowing back into the second liquid inlet channel.

2. The combination valve according to claim 1, characterized in that: The cross-sectional area of ​​the first liquid inlet flow channel is larger than the cross-sectional area of ​​the connecting channel, so that the flow velocity of the fluid in the first liquid inlet flow channel becomes faster when passing through the connecting channel.

3. The combination valve according to claim 1, characterized in that: The bottom end of the communication channel is higher than the abutment portion where the valve seat of the second valve cavity abuts against the valve core.

4. The combination valve according to claim 1, characterized in that: The one-way valve assembly comprises a one-way valve chamber and a sealing member, wherein the one-way valve chamber is provided in the manifold block, and an inlet of the one-way valve chamber is communicated with the flow channel, and an outlet of the one-way valve chamber is communicated with the valve chamber; When the one-way valve cavity outlet pressure is greater than the one-way valve cavity inlet pressure, the sealing member will close the one-way valve cavity inlet.

5. The combination valve according to claim 4, characterized in that: The manifold block includes a first block and a second block, and the one-way valve chamber includes an upper chamber on the first block and a lower chamber arranged on the second block; The one-way valve cavity outlet is arranged on the inner wall of the upper cavity, and the one-way valve cavity inlet is arranged on the inner wall of the lower cavity.

6. The combination valve according to claim 5, characterized in that: One of the first block and the second block is provided with an annular protrusion, and the other is provided with an annular groove, and the annular protrusion and the annular groove both surround the outside of the one-way valve cavity. The annular protrusion can be inserted into the annular groove with interference fit to improve the sealing performance at the connection between the upper cavity and the lower cavity.

7. The combination valve according to claim 6, characterized in that: One of the first block and the second block is provided with a positioning protrusion, and the other is provided with a positioning groove; When the annular protrusion is inserted into the annular groove, the positioning protrusion can be inserted into the annular groove at the same time to achieve positioning of the first block and the second block.

8. The combination valve according to claim 5, characterized in that: The sealing member includes a spring, and the top end of the spring is disposed against the top wall of the upper cavity; The cavity height of the upper cavity is H, the maximum length of the spring inside the one-way valve cavity is L, and H / L≥0.

8.

9. The combination valve according to claim 1, characterized in that: An annular recess is arranged at the bottom end of the valve core, and the annular recess has an inner side wall inclined inwardly and an outer side wall inclined outwardly. An annular chamfer is arranged on the valve cavity valve seat, and an annular channel is formed between the annular chamfer and the inner side wall of the annular recess.

10. The combination valve according to any one of claims 5 to 8, characterized in that: One of the first liquid inlet channel and the second liquid inlet channel is a slurry liquid inlet channel, and the other is a cleaning liquid inlet channel. The one-way valve assembly is arranged in the slurry liquid inlet channel, the first liquid inlet channel is arranged in the first block, and the second liquid inlet channel is arranged in the second block.

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