Double-end diaphragm valve

Abstract

The utility model discloses a double-end diaphragm valve which comprises a valve body, two valve element assemblies and a valve element driving assembly, the number of the valve element assemblies is two, and the two valve element assemblies are symmetrically arranged along the central axis in the length direction of the valve body. The valve element driving assembly is configured to drive the valve element assembly to open or close the first valve port and / or the second valve port. By arranging the two symmetrical valve element assemblies and matching with the valve body provided with the main fluid channel, the flow dividing channel, the first branch channel and the second branch channel, pressure dividing of conveyed fluid is achieved, the pressure of the fluid to a valve port is reduced to half of the original pressure, and the applicable fluid pressure upper limit of the valve body is greatly improved; and meanwhile, a double-path independent fluid control function can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid control valve technical field, especially relate to a double -end diaphragm valve. BACKGROUND

[0002] As an important fluid control device, diaphragm valves are widely used in chemical, pharmaceutical, food processing and water treatment industries. The core design usually includes a valve body, a valve cover and a flexible diaphragm between them. The movement of the diaphragm is controlled by a drive mechanism to open and close the valve. When the valve is closed, the diaphragm is deformed under the action of driving force and tightly fits the valve seat or sealing surface inside the valve body, thereby cutting off the fluid passage.

[0003] However, the traditional diaphragm valve has obvious technical limitations in practical application, especially when facing higher fluid pressure or pressure fluctuation conditions. When the fluid pressure in the system abnormally rises or exceeds the design pressure range of the diaphragm, the pressure of the fluid may directly act on the sealing area of the diaphragm, causing local deformation, displacement or even being "blown open" by the fluid pressure, resulting in gaps in the sealing surface that should be in a closed state. This phenomenon not only damages the sealing integrity of the valve, causing medium leakage and affecting the stability and safety of the process, but also may cause environmental pollution, product loss or equipment corrosion due to leakage. SUMMARY

[0004] The utility model aims at at least solves one of the prior art technical problems. For this purpose, the utility model provides a double -end diaphragm valve, which can reduce the pressure of fluid on the diaphragm and improve the upper limit of fluid pressure applicable to the diaphragm valve.

[0005] According to the double-head diaphragm valve, two groups of valve core assemblies are symmetrically arranged along the central axis of the length direction of the valve body, the main fluid channel is connected with the first branch flow channel and the second branch flow channel through the branch flow channel, liquid flows into the first branch flow channel and the second branch flow channel from the main fluid channel through the branch flow channel, or liquid flows out through the main fluid channel after being simultaneously merged into the branch flow channel from the first branch flow channel and the second branch flow channel, one end of the first valve port is connected with the first branch flow channel, and the other end of the first valve port is connected with the branch flow channel, one end of the second valve port is connected with the second branch flow channel, and the other end of the second valve port is connected with the branch flow channel, the valve core assembly is used for opening or closing the first valve port and / or the second valve port, the valve core driving assembly is two groups, the two groups of valve core driving assemblies are respectively connected with the two groups of valve core assemblies, and the valve core driving assembly is configured to drive the valve core assembly to open or close the first valve port and / or the second valve port.

[0006] At least the following beneficial effects are achieved: by arranging two groups of symmetric valve core assemblies, and cooperating with the valve body with a main fluid channel, a branch flow channel, a first branch flow channel and a second branch flow channel, the pressure of the delivered fluid is divided, the pressure of the fluid on the valve port is reduced to half of the original, the upper limit of the fluid pressure applicable to the valve body is greatly improved, and the independent fluid control function of the double-way is also realized. The on-off of two-way fluid can be controlled simultaneously or independently, the working efficiency and flow control ability of the valve are significantly improved, the symmetric layout makes the fluid flow more uniform and stable when being divided or merged, and the fluid resistance and fluctuation are reduced, in addition, the double-valve-port design also provides the possibility of redundant backup for the system, one-way valve maintenance, the other way can still maintain part of the flow function, and the overall reliability of the system is improved.

[0007] According to some embodiments of the utility model, the valve core driving assembly includes a valve shell, an electromagnetic coil and a valve cover, the valve shell is connected with the valve body, the electromagnetic coil is arranged in the valve shell, the valve cover is arranged at one end of the valve shell and away from the valve body, and the valve cover is configured to seal the valve shell.

[0008] According to some embodiments of this utility model, the valve core assembly includes a valve core, a valve core spring, a valve stem, a diaphragm, and a limiting member. The valve core is movably disposed in the electromagnetic coil along the axial direction of the electromagnetic coil. The limiting member is connected to the valve housing and has a valve stem hole and a stop ring on it. One end of the valve stem passes through the valve stem hole and is connected to the diaphragm, while the other end of the valve stem is inserted into the valve core. The valve stem moves with the valve core. The valve core spring is sleeved on the valve stem, with one end of the valve core spring abutting against the stop ring and the other end connected to the valve... The valve stem is connected to the valve body. The diaphragm is disposed on the valve body and fits against the first valve port and / or the second valve port. The center of the diaphragm is connected to the end of the valve stem. The valve stem moves to cause the diaphragm to undergo elastic deformation. The electromagnetic coil is configured to attract the valve core away from the valve body when energized. The valve core drives the valve stem away from the valve body. The valve stem causes the diaphragm to deform and open the first valve port and / or the second valve port. The valve core spring is configured to push the diaphragm to fit tightly and close the first valve port and / or the second valve port.

[0009] According to some embodiments of the present invention, the valve core assembly further includes a stroke adjustment component, which is disposed on the valve core and is capable of adjusting the relative position of the valve stem and the valve core.

[0010] According to some embodiments of the present invention, the stroke adjustment assembly includes an adjustment hole and a stop member. The valve core has a valve stem through hole, and the valve stem is movably inserted into the valve stem through hole. The adjustment hole is opened on the valve core along the vertical direction of the valve stem through hole axis. The adjustment hole is a threaded hole and communicates with the valve stem through hole. The stop member is screwed into the adjustment hole and can abut against the valve stem to lock the relative position of the valve stem and the valve core.

[0011] According to some embodiments of this utility model, the abutment is a kimmel screw.

[0012] According to some embodiments of the present invention, the stroke adjustment assembly is provided in several groups, and the several groups of stroke adjustment assemblies are evenly arranged along the circumference of the valve core.

[0013] According to some embodiments of the present invention, a diaphragm sealing groove is provided on the valve body, a sealing ring is provided on the diaphragm, and the sealing ring is embedded in the diaphragm sealing groove.

[0014] According to some embodiments of the present invention, a connecting ring is provided on the diaphragm, the valve stem is inserted in the connecting ring, an abutting protrusion is provided on the valve stem, and one end of the valve core spring abuts against the abutting protrusion.

[0015] According to some embodiments of the present application, the diaphragm and the valve stem are integrally injection molded.

[0016] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0018] Figure 1 is a sectional view of the present application embodiment;

[0019] Figure 2 is a structure schematic view of the valve body of the present application embodiment;

[0020] Figure 3 is a structure schematic view of the valve core assembly of the present application embodiment;

[0021] Figure 4 is Figure 1 is a local enlarged view of A in the middle;

[0022] Figure 5 is a structure schematic view of the present application embodiment.

[0023] REFERENCE NUMERALS:

[0024] Valve body 10, main fluid passage 11, shunt passage 12, first branch flow passage 13, first valve port 14, second branch flow passage 15, second valve port 16, diaphragm sealing groove 17;

[0025] Valve core assembly 20, valve core 21, valve stem through hole 211, valve core spring 22, valve stem 23, abutting convex ring 231, diaphragm 24, sealing ring 241, connecting ring 242, stroke adjusting assembly 25, adjusting hole 251, abutting piece 252, limiting piece 26, valve stem hole 261, abutting ring 262;

[0026] Valve core driving assembly 30, valve shell 31, electromagnetic coil 32, valve cover 33. DETAILED DESCRIPTION

[0027] In the description of the present application, it is understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by the upper, lower, front, rear, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0028] In the description of the utility model, if it is described to first, second, only for distinguishing technical features for the purpose, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the relationship between the indicated technical features.

[0029] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection should be understood broadly, and the skilled person in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0030] Refer to Figures 1 to 5 The utility model discloses a double -end diaphragm valve, including valve body 10, valve core subassembly 20 and valve core drive subassembly 30.

[0031] Valve core subassembly 20 is connected with valve body 10, and valve core subassembly 20 is two groups, and two groups of valve core subassembly 20 are symmetrically arranged along the central axis of the length direction of valve body 10, and valve body 10 is equipped with main fluid passage 11, shunt passage 12, first branch flow passage 13, first valve port 14, second branch flow passage 15 and second valve port 16, and main fluid passage 11 is connected first branch flow passage 13 and second branch flow passage 15 through shunt passage 12, and liquid flows into first branch flow passage 13 and second branch flow passage 15 after passing through shunt passage 12 from main fluid passage 11, or liquid flows out through main fluid passage 11 after simultaneously converging into shunt passage 12 from first branch flow passage 13 and second branch flow passage 15;

[0032] One end of first valve port 14 is connected with first branch flow passage 13, and the other end is connected with shunt passage 12, one end of second valve port 16 is connected with second branch flow passage 15, and the other end is connected with shunt passage 12;

[0033] Valve core subassembly 20 is used to open or close first valve port 14 and / or second valve port 16, and valve core drive subassembly 30 is two groups, and two groups of valve core drive subassembly 30 are connected with two groups of valve core subassembly 20 respectively, and valve core drive subassembly 30 is configured as driving valve core subassembly 20 to open or close first valve port 14 and / or second valve port 16.

[0034] It can be understood that by setting two groups of valve core assemblies 20 symmetrically, and cooperating with the valve body 10 with the main fluid channel 11, the branch channel 12, the first branch channel 13 and the second branch channel 15, the pressure of the delivered fluid is divided, the pressure of the fluid on the valve port is reduced to half of the original, the upper limit of the fluid pressure applicable to the valve body is greatly improved, and the independent fluid control function of the double-way is also realized. The on-off of two-way fluid can be controlled simultaneously or independently, which significantly improves the working efficiency and flow control ability of the valve; the symmetrical layout makes the fluid flow more uniform and stable when branching or converging, reduces the fluid resistance and fluctuation; in addition, the double-valve-port design also provides the possibility of redundant backup for the system, one-way valve maintenance, the other way can still maintain part of the flow function, which improves the overall reliability of the system.

[0035] With reference to Figure 1 The valve core driving assembly 30 comprises a valve shell 31, an electromagnetic coil 32 and a valve cover 33, the valve shell 31 is connected with the valve body 10, the electromagnetic coil 32 is arranged in the valve shell 31, and the valve cover 33 is arranged at one end of the valve shell 31 and away from the valve body 10, and the valve cover 33 is configured to seal the valve shell 31.

[0036] It is worth noting that in some embodiments of the utility model, two groups of independent valve core driving assemblies 30 are used to drive two groups of valve core assemblies 20 respectively, which realizes independent and precise driving control of the first valve port 14 and the second valve port 16, enhances the flexibility of valve control, allows users to control the on-off of any one-way or both-way fluid according to needs, and meets the requirements of complex process flow; the independent driving mode also avoids mutual interference between two-way control, and improves the control accuracy and stability of the system.

[0037] With reference to Figure 3The valve core assembly 20 comprises a valve core 21, a valve core spring 22, a valve rod 23, a diaphragm 24 and a limiting piece 26, the valve core 21 is movably arranged in the electromagnetic coil 32 along the axial direction of the electromagnetic coil 32, the limiting piece 26 is connected with the valve shell 31, the limiting piece 26 is provided with a valve rod hole 261 and an abutting ring 262, one end of the valve rod 23 is connected with the diaphragm 24 through the valve rod hole 261, the other end of the valve rod 23 is inserted into the valve core 21, the valve rod 23 moves with the valve core 21, the valve core spring 22 is sleeved on the valve rod 23, one end of the valve core spring 22 is abutted on the abutting ring 262, and the other end of the valve core spring 22 is connected with the valve rod 23, the diaphragm 24 is arranged on the valve body 10 and abuts against the first valve port 14 and / or the second valve port 16, the center position of the diaphragm 24 is connected with the end of the valve rod 23, the valve rod 23 moves to drive the diaphragm 24 to elastically deform, the electromagnetic coil 32 is configured to attract the valve core 21 away from the valve body 10 after being energized, the valve core 21 drives the valve rod 23 to move away from the valve body 10, the valve rod 23 drives the diaphragm 24 to deform and open the first valve port 14 and / or the second valve port 16, and the valve core spring 22 is configured to push the diaphragm 24 to tightly abut and close the first valve port 14 and / or the second valve port 16.

[0038] It should be noted that, in the embodiment of the utility model, the diaphragm 24 is used as a sealing element to isolate the valve cavity from the driving cavity, thereby ensuring that the fluid medium does not leak and being suitable for high-purity or corrosive fluid; the valve core spring 22 provides a normally closed force to ensure that the diaphragm 24 can tightly abut against the valve port when power is off, thereby realizing reliable closing, the electromagnetic force overcomes the spring force to realize opening, and a safety mode of normally closed when power is off is formed.

[0039] The valve rod 23 connects the valve core 21 and the diaphragm 24 to convert electromagnetic driving into linear motion of the diaphragm 24; the limiting piece 26 and the valve rod hole 261 thereon provide accurate guidance for the valve rod 23, thereby ensuring linear motion, and the abutting ring 262 provides a stable action fulcrum for the valve core spring 22.

[0040] Meanwhile, the valve core spring 22 is sleeved on the valve rod 23, the valve rod 23 provides guidance for the extension and contraction of the valve core spring 22, thereby avoiding the risk of deformation and distortion of the valve core spring 22 and improving the stability of the product.

[0041] Finally, the valve core spring 22 is directly connected with the diaphragm 24 and is closer to the moving component, thereby providing elastic force for closing the valve port; compared with the prior art in which the spring is arranged at the end far from the diaphragm 24, the utility model is more labor-saving and can further improve the closing effect of the diaphragm 24.

[0042] Referring to Figure 3 The valve core assembly 20 further comprises a stroke adjusting assembly 25, the stroke adjusting assembly 25 is arranged on the valve core 21, and the stroke adjusting assembly 25 can adjust the relative position of the valve rod 23 and the valve core 21.

[0043] The stroke adjusting assembly 25 can conveniently and accurately adjust the relative position of the valve core 21 and the valve rod 23, thereby realizing the stroke adjustment of the valve rod 23, and when the stroke of the valve rod 23 changes, the inlet and outlet pressure changes, thereby realizing the accurate control of the inlet and outlet pressure.

[0044] When the inlet and outlet pressure needs to be adjusted, the relative position of the valve rod 23 and the valve core 21 can be adjusted through the stroke adjusting assembly 25, thereby realizing the stroke adjustment of the valve rod 23, because the component providing the inlet and outlet pressure is the valve core spring 22 which is a compression spring, and when the stroke of the valve rod 23 changes, the inlet and outlet pressure changes correspondingly.

[0045] With reference to Figure 3 , the stroke adjusting assembly 25 comprises an adjusting hole 251 and a top piece 252, the valve core 21 is provided with a valve rod through hole 211, the valve rod 23 is movably inserted in the valve rod through hole 211, the adjusting hole 251 is provided on the valve core 21 along the vertical direction of the axis of the valve rod through hole 211, the adjusting hole 251 is a threaded hole, the adjusting hole 251 is communicated with the valve rod through hole 211, and the top piece 252 is screwed in the adjusting hole 251 and can abut against the valve rod 23 to lock the relative position of the valve rod 23 and the valve core 21.

[0046] It can be understood that after the relative position of the valve core 21 and the valve rod 23 is determined, the top piece 252 is screwed into the adjusting hole 251 and abuts against the valve rod 23, thereby realizing the relative fixation of the valve core 21 and the valve rod 23. When the inlet and outlet pressure needs to be adjusted, the top piece 252 is only needed to be unscrewed, the relative position of the valve core 21 and the valve rod 23 is adjusted, and then the top piece 252 is screwed again and abuts against the valve rod 23, thereby realizing the adjustment of the inlet and outlet pressure.

[0047] It is worth mentioning that in the embodiments of the utility model, the top piece 252 is a grub screw (also known as a stop screw or a top screw).

[0048] With reference to Figure 3 , the stroke adjusting assembly 25 is provided in several groups, and the several groups of stroke adjusting assemblies 25 are evenly arranged along the circumference of the valve core 21.

[0049] It is worth mentioning that in some embodiments of the utility model, the number of the stroke adjusting assemblies 25 can be one group, two groups, three groups, four groups or the like, and the specific number is set by the person skilled in the art according to the requirement.

[0050] With reference to Figure 4 , the valve body 10 is provided with a diaphragm sealing groove 17, the diaphragm 24 is provided with a sealing ring 241, and the sealing ring 241 is embedded in the diaphragm sealing groove 17.

[0051] It is worth mentioning that the diaphragm sealing groove 17 cooperates with the sealing ring 241 to realize the sealing of the environments on both sides of the diaphragm 24, thereby preventing fluid from entering the valve core assembly 20.

[0052] With reference to Figure 3 The diaphragm 24 is provided with a connecting ring 242, the valve rod 23 is inserted in the connecting ring 242, the valve rod 23 is provided with an abutting convex ring 231, and one end of the valve core spring 22 abuts against the abutting convex ring 231.

[0053] It can be understood that the connecting ring 242 provided on the diaphragm 24 provides a stable connecting fixing point for the end of the valve rod 23, and the abutting convex ring 231 on the valve rod 23 provides an abutting point for the valve core spring 22, thereby preventing the end of the valve core spring 22 from slipping and ensuring that the spring force is uniformly applied to the valve rod 23 along the axis to push the center of the valve rod 23 and the diaphragm 24 to be close to the first valve port 14 and / or the second valve port 16. The connecting ring 242 strengthens the connection strength and reliability of the end of the valve rod 23 and the central region of the diaphragm 24, so that the transmission of driving force is more direct and efficient.

[0054] In some embodiments of the utility model, the diaphragm 24 and the valve rod 23 are integrally injection molded.

[0055] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that the combinations are within the scope of the present application.

[0056] Of course, the utility model is not limited to the above-mentioned implementation manners, and those skilled in the art can make equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the range defined by the claims of the present application.

Claims

1. A double-ended diaphragm valve characterized by, Comprise: Valve body (10), valve core assembly (20) and valve core drive assembly (30), the valve core assembly (20) is connected with the valve body (10), the valve core assembly (20) is two groups, two groups of the valve core assembly (20) are symmetrically arranged along the length direction of the central axis of the valve body (10), the valve body (10) is provided with main fluid channel (11), branch channel (12), first branch flow channel (13), first valve port (14), second branch flow channel (15) and second valve port (16), the main fluid channel (11) is connected with the first branch flow channel (13) and the second branch flow channel (15) through the branch channel (12), liquid flows through the branch channel (12) from the main fluid channel (11) and enters the first branch flow channel (13) and the second branch flow channel (15), or liquid flows into the branch channel (12) from the first branch flow channel (13) and the second branch flow channel (15) simultaneously and then flows out through the main fluid channel (11); The first valve port (14) is connected with the first branch flow channel (13) at one end, and is connected with the branch channel (12) at the other end, the second valve port (16) is connected with the second branch flow channel (15) at one end, and is connected with the branch channel (12) at the other end; The valve core assembly (20) is used for opening or closing the first valve port (14) and / or the second valve port (16), the valve core drive assembly (30) is two groups, two groups of the valve core drive assembly (30) are connected with two groups of the valve core assembly (20) respectively, the valve core drive assembly (30) is configured to drive the valve core assembly (20) to open or close the first valve port (14) and / or the second valve port (16).

2. A double-ended diaphragm valve according to claim 1, wherein The valve core drive assembly (30) comprises valve shell (31), electromagnetic coil (32) and valve cover (33), the valve shell (31) is connected with the valve body (10), the electromagnetic coil (32) is arranged in the valve shell (31), the valve cover (33) is arranged at one end of the valve shell (31) and away from the valve body (10), and the valve cover (33) is configured to seal the valve shell (31).

3. A double-ended diaphragm valve according to claim 2, wherein The valve core assembly (20) comprises a valve core (21), a valve core spring (22), a valve rod (23), a diaphragm (24) and a limiting piece (26), the valve core (21) is movably arranged in the electromagnetic coil (32) along the axial direction of the electromagnetic coil (32), the limiting piece (26) is connected with the valve shell (31), the limiting piece (26) is provided with a valve rod hole (261) and an abutting ring (262), one end of the valve rod (23) is connected with the diaphragm (24) through the valve rod hole (261), the other end of the valve rod (23) is inserted into the valve core (21), the valve rod (23) moves with the valve core (21), the valve core spring (22) is sleeved on the valve rod (23), one end of the valve core spring (22) abuts against the abutting ring (262), and the other end of the valve core spring (22) is connected with the valve rod (23), the diaphragm (24) is arranged on the valve body (10) and abuts against the first valve port (14) and / or the second valve port (16), the center position of the diaphragm (24) is connected with the end of the valve rod (23), the valve rod (23) moves to drive the diaphragm (24) to elastically deform, the electromagnetic coil (32) is configured to attract the valve core (21) away from the valve body (10) after being energized, the valve core (21) drives the valve rod (23) to move away from the valve body (10), the valve rod (23) drives the diaphragm (24) to deform and open the first valve port (14) and / or the second valve port (16), and the valve core spring (22) is configured to push the diaphragm (24) to abut against and close the first valve port (14) and / or the second valve port (16).

4. A double-ended diaphragm valve according to claim 3, wherein The valve core assembly (20) further comprises a stroke adjusting assembly (25), the stroke adjusting assembly (25) is arranged on the valve core (21), and the stroke adjusting assembly (25) can adjust the relative position of the valve rod (23) and the valve core (21).

5. A double-ended diaphragm valve according to claim 4, wherein The stroke adjusting assembly (25) comprises an adjusting hole (251) and an abutting piece (252), the valve core (21) is provided with a valve rod through hole (211), the valve rod (23) is movably inserted into the valve rod through hole (211), the adjusting hole (251) is arranged on the valve core (21) along the vertical direction of the axis of the valve rod through hole (211), the adjusting hole (251) is a threaded hole, the adjusting hole (251) is in communication with the valve rod through hole (211), and the abutting piece (252) is screwed in the adjusting hole (251) and can abut against the valve rod (23) to lock the relative position of the valve rod (23) and the valve core (21).

6. A double-ended diaphragm valve according to claim 5, wherein, The abutting piece (252) is a Kjemi screw.

7. A double-ended diaphragm valve according to claim 4 wherein, The stroke adjusting assembly (25) is provided in several groups, and the several groups of stroke adjusting assemblies (25) are uniformly arranged along the circumference of the valve core (21).

8. A double-ended diaphragm valve according to claim 3, wherein The valve body (10) is provided with a diaphragm sealing groove (17), and the diaphragm (24) is provided with a sealing ring (241), which is embedded in the diaphragm sealing groove (17).

9. A double-ended diaphragm valve according to claim 3 wherein, The diaphragm (24) is provided with a connecting ring (242), the valve rod (23) is inserted into the connecting ring (242), and the valve rod (23) is provided with an abutting convex ring (231), and one end of the valve core spring (22) abuts against the abutting convex ring (231).

10. A double-ended diaphragm valve according to claim 3, wherein The diaphragm (24) and the valve rod (23) are integrally injection molded.

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