A sealing device and valve body system

Abstract

The application discloses a sealing device and a valve body system, wherein the sealing device comprises a driving member, a sealing body and an expansion member. The sealing body is adapted to be mounted on a housing body, and the sealing body has a mounting hole adapted to cooperate with a pipe body to be sealed and a mounting cavity. The expansion member is mounted in the mounting cavity, and the expansion member has an expansion cavity in communication with the driving member. The expansion member has an expansion state under the driving of the driving member, in which the expansion cavity area is expanded to drive the sealing body to deform along the radial direction of the mounting hole towards the side of the pipe body to be sealed, and the sealing pressure of the sealing body on the pipe body to be sealed is also increased, so that no leakage occurs at the connection of the process pipeline in the multi-way valve body. In addition, when the valve body structure needs to be switched to rotate, the expansion member does not expand, and only the sealing body is used to seal the pipeline, so that the rotating friction resistance at the sealing position is reduced, and the problem that the rotary valve is difficult to rotate is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve sealing, in particular to a sealing device and a valve system. BACKGROUND

[0002] At present, the devices for continuous ion exchange and adsorption in the industry are most common in the "carousel" rotary disc system, the valve array system and the multi-way valve device. The rotary disc system cannot realize the production of a system with a large volume because the whole resin column with resin needs to be rotated by a rotating disc, and the core components of the rotating disc are difficult to manufacture and maintain, so the rotary disc system cannot be widely used in various application fields. The valve array system can realize continuous operation by simulating the movement of resin through the high-frequency switching of valves without moving the resin column, but a large number of valves are required for a complex process system, and the control precision and safety of the system are very high. The multi-way valve device realizes a completely continuous process by connecting the feed pipe and the discharge pipe through the internal pipeline of the rotary valve core without moving the resin and the resin column. The multi-way valve device avoids the complexity and bulkiness of the rotary disc system and the many hidden dangers caused by the high-frequency switching of valves in the valve array system, and has been widely recognized and applied in the market.

[0003] The existing multi-way valve device needs to use a sealing gasket to generate a sealing force by relying on its elasticity and pre-tightening force to realize the sealing performance of the rotary valve during rotation. However, if the sealing force is too large, the rotary valve is prone to rotation difficulty due to excessive resistance, but if the sealing force is too small, there is a risk of leakage and internal material mixing in the valve body pipeline. Therefore, the existing expansion structure cannot be applied to the multi-way valve device, and there is a risk of medium leakage in the pipeline or rotation difficulty of the valve body due to excessive resistance. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is that the expansion structure in the prior art cannot be applied to the multi-way valve device, and there is a risk of medium leakage in the pipeline or rotation difficulty of the valve body due to excessive resistance.

[0005] Therefore, the present application provides a sealing device, which comprises:

[0006] a driving member;

[0007] a sealing body adapted to be mounted on the housing body, the sealing body having a mounting hole adapted to cooperate with a pipe body to be sealed, and the sealing body having a mounting cavity;

[0008] An expansion member is installed in the installation cavity, and the expansion member has an expansion cavity, and the driving member is in communication with the expansion cavity;

[0009] The expansion member has an expansion state in which the expansion cavity expands in area under the driving of the driving member to drive the sealing body to deform along the radial direction of the installation hole toward the side of the pipe body to be sealed.

[0010] Optionally, the sealing device described above, the installation cavity is an annular cavity, and the expansion member is an annular expansion member, and the annular expansion member is installed in the annular cavity.

[0011] Optionally, the sealing device described above, the annular cavity is coaxially arranged with the installation hole.

[0012] Optionally, the sealing device described above, the cross section of the expansion member is one of circular, square, rectangular, trapezoidal, M-shaped, D-shaped, C-shaped, and V-shaped.

[0013] Optionally, the sealing device described above, the material of the expansion member is natural rubber or synthetic rubber or composite rubber.

[0014] The expansion member is one of silica gel, ethylene-propylene-diene rubber, butadiene-acrylonitrile rubber, fluororubber, fluorosilicone rubber, perfluororubber, hydrogenated butadiene-acrylonitrile rubber, and fluorine-coated rubber.

[0015] Optionally, the sealing device described above, in the expansion state, the driving member is used to deliver a medium into the expansion cavity.

[0016] The medium is gaseous, and the medium is air or nitrogen; or the medium is liquid, and the medium is one of water and inorganic salt solution.

[0017] Optionally, the sealing device described above, the sealing body includes a communication hole, the communication hole is in communication with the installation cavity, and the opening of the communication hole away from the installation cavity side is arranged on the end face of the sealing body.

[0018] A communication pipeline is further arranged between the driving member and the expansion member, the communication pipeline is installed in the communication hole, one end of the communication pipeline is in communication with the expansion cavity, and the other end of the communication pipeline is adapted to communicate with the driving member.

[0019] Optionally, the sealing device described above further comprises a plugging member, the plugging member is detachably arranged on the end of the communication pipeline away from the expansion member, and the plugging member is adapted to be enclosed with the expansion member and the communication pipeline to form a sealed space.

[0020] A valve body system comprises a housing body, a plurality of pipes to be sealed, and the sealing device described above, and the sealing body is installed between the housing body and the pipes to be sealed.

[0021] Optionally, the valve body system described above, the sealing body is further provided with a limiting hole, the valve body system further comprises a limiting piece, the limiting piece is adapted to pass through the limiting hole to lock with the shell body.

[0022] The technical scheme provided by the present application has the following advantages:

[0023] 1. The sealing device provided by the present application comprises a driving piece, a sealing body and an expansion piece. The sealing body is adapted to be mounted on a shell body, the sealing body has a mounting hole adapted to cooperate with a pipe body to be sealed, and the sealing body has a mounting cavity. The expansion piece is mounted in the mounting cavity, the expansion piece has an expansion cavity, and the driving piece communicates with the expansion cavity. The expansion piece has an expansion state in which the area of the expansion cavity is expanded under the driving of the driving piece to drive the sealing body to deform along the radial direction of the mounting hole towards the pipe body to be sealed.

[0024] The sealing device of this structure communicates with the driving piece and the expansion piece. When the rotary valve is rotated in place, the area of the expansion cavity is increased, the expansion piece abuts against the inner wall surface of the mounting cavity, and finally the mounting cavity deforms along with the deformation of the expansion piece. Specifically, the expansion piece drives the sealing body to deform towards the mounting hole. At this time, since the mounting cavity deforms, the sealing pressure of the sealing body on the pipe body to be sealed also increases, further improving the sealing performance of the sealing body on the pipe body to be sealed, ensuring that no leakage occurs at the connection of the process pipeline in the multi-way valve body, and in the expansion state, the size of the expansion cavity can be adjusted and corrected in real time by the driving of the driving piece, thereby avoiding the problem of frequent leakage caused by sealing deformation. In addition, when the valve body structure needs to be switched and rotated, the medium in the expansion piece is sucked by the driving of the driving piece, so that the expansion cavity of the expansion piece is reduced, so that only the sealing body seals the pipeline, reduces the rotating friction resistance at the sealing position, avoids the problem of difficult rotation of the rotary valve, and further, if the cooperation relationship between the pipe body to be sealed and the mounting hole is gap cooperation, the friction resistance is smaller. Through the cooperation of the driving piece and the expansion piece, the pressurization and depressurization actions between the pipe body and the sealing structure are realized, thereby ensuring the normal operation of the valve body system and avoiding shutdown for maintenance.

[0025] 2. Through long-term industrial operation, it is found that when the operating pressure of the multi-way valve system exceeds 0.3 Mpa, the equipment will obviously leak and cause material mixing, which poses a great risk in some fields requiring high precision, and it is difficult to fundamentally change the sealing effect by using the current sealing method. By using the above sealing device, the operating pressure of the valve body structure can reach more than 0.5 Mpa, and experiments have found that the valve body system using the sealing device does not have the problems of leakage and material mixing. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the valve body system provided in the embodiment;

[0028] Figure 2 This is a top view of the valve body system provided in the embodiment;

[0029] Figure 3 for Figure 2 A sectional view along section CC;

[0030] Figure 4 for Figure 3 A magnified structural diagram of circle A;

[0031] Figure 5 for Figure 4 A magnified structural diagram of circle B;

[0032] Figure 6 This is a graph showing the relationship between the content of lithium ions and magnesium ions in the outlet pipe and time.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1-Sealing body; 11-Mounting cavity; 12-Mounting hole; 13-Communication hole; 14-Limiting hole;

[0035] 2-Expansion component; 21-Expansion cavity;

[0036] 31-Suppressing component; 32-Connecting pipe;

[0037] 4-Limiting components;

[0038] 5-Shell body; 51-Flow inlet pipe; 52-Flow outlet pipe;

[0039] 6-Rotating disk; 61-Transition path;

[0040] 7-Circular circulation path;

[0041] 8-Rotary drive; Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] Example 1

[0047] This embodiment provides a sealing device, such as Figures 1 to 5 As shown, it includes: a driving component, a sealing body 1, and an expansion component 2. The sealing body 1 is adapted to be mounted on a housing body, and has a mounting hole 12 adapted to mate with a pipe body to be sealed. The sealing body 1 also has a mounting cavity 11. The expansion component 2 is installed within the mounting cavity 11 and has an expansion cavity 21. The driving component communicates with the expansion cavity 21. Under the drive of the driving component, the expansion component 2 has an expanded state in which the area of ​​the expansion cavity 21 expands, causing the sealing body 1 to deform radially toward the pipe body to be sealed along the mounting hole 12.

[0048] Specifically, the mounting cavity 11 is an annular cavity, the expansion member 2 is an annular expansion member 2, and the annular expansion member 2 is installed in the annular cavity; the annular cavity is coaxially arranged with the mounting hole 12.

[0049] The mounting cavity 11 in the form of a ring ensures that the expansion member 2 expands, and that the driving force for deforming the inner side wall of the mounting cavity 11 is the same during the expansion of the mounting cavity 11, and further ensures that the sealing force of the sealing body 1 acting on the outer wall of the pipe to be sealed is uniform everywhere, avoiding uneven unilateral force and causing medium leakage.

[0050] In the embodiment, the expansion member 2 is in the form of M, and of course, in other alternative embodiments, the cross section of the expansion member 2 can also be in the form of a circle, a square, a rectangle, a trapezoid, a D, a C, a V, etc., as long as it can be driven by the driving member and the inner wall of the mounting hole 12 deforms when the area of the expansion cavity 21 increases.

[0051] In the embodiment, the material of the expansion member 2 is natural rubber or synthetic rubber or composite rubber; for example, the expansion member 2 can be one of silica gel, ethylene-propylene-diene rubber, cis-polybutadiene rubber, fluororubber, fluorosilicone rubber, perfluororubber, hydrogenated cis-polybutadiene rubber, and fluorine-coated rubber.

[0052] The driving member is used to deliver the medium into the expansion cavity 21; wherein the medium can be a gas, and the medium is one of air, nitrogen, and inert gas, at this time, the driving member is an air compressor, which cooperates with the opening and closing valve body to realize the filling or pressure relief of the gas in the expansion member 2; of course, in other alternative embodiments, the medium is liquid, and the medium is one of water and inorganic salt solution, for example, the driving member can be a pump body.

[0053] In the embodiment, the sealing body 1 includes a communication hole 13, the communication hole 13 communicates with the mounting cavity 11, and the opening of the communication hole 13 away from the mounting cavity 11 is arranged on the end face of the sealing body 1. Specifically, the communication hole 13 is a cylindrical through hole.

[0054] The driving member and the expansion member 2 are further provided with a communication pipeline 32, the communication pipeline 32 is installed in the communication hole 13, one end of the communication pipeline 32 communicates with the expansion cavity 21; the other end of the communication pipeline 32 is adapted to communicate with the driving member.

[0055] In the embodiment, the sealing device further includes a plugging member 31, the plugging member 31 is detachably arranged on the end of the communication pipeline 32 away from the expansion member 2, and the plugging member 31 is adapted to be enclosed with the expansion member 2 and the communication pipeline 32 to form a sealed space.

[0056] This sealing device, through the connection between the driving component and the expansion component 2, increases the area of ​​the expansion chamber 21 when the rotary valve needs to be rotated to the desired position. The expansion component 2 then abuts against the inner wall of the mounting cavity 11. Ultimately, the mounting cavity 11 deforms along with the expansion component 2. Specifically, the expansion component 2 drives the sealing body 1 to deform towards the mounting hole 12. At this time, due to the deformation of the mounting cavity 11, the sealing pressure of the sealing body 1 on the pipe to be sealed also increases, further improving the sealing performance of the sealing body 1 on the pipe to be sealed and ensuring the sealing performance at the process pipeline connection within the multi-way valve body. No leakage occurs. In the expanded state, the area of ​​the expansion chamber 21 can be adjusted and corrected in real time by driving the drive component, thereby avoiding frequent leakage due to seal deformation. In addition, when the valve body structure needs to switch rotation, the medium in the expansion component 2 is drawn out by the drive component, causing the expansion chamber 21 of the expansion component 2 to shrink, so that the pipeline is sealed only by the sealing body 1, reducing the rotational friction resistance at the seal and avoiding the problem of difficulty in rotating the rotary valve. Furthermore, if the fit between the sealing pipe body and the mounting hole is a clearance fit, the frictional resistance is even smaller. Through the cooperation of the drive component and the expansion component 2, the pressurization and depressurization actions between the pipe body and the sealing structure are realized, thereby ensuring the normal operation of the valve body system and avoiding downtime for maintenance.

[0057] Example 2

[0058] This embodiment provides a valve body system, such as Figure 1 , Figure 2 and Figure 3 As shown, the valve system in this embodiment is a multi-way valve, which includes a housing body, a rotary actuator 8, a rotating disk 6, and the sealing device provided in Embodiment 1. The rotary actuator 8 is connected to the rotating disk 6, and drives the rotating disk 6 to rotate within the housing body 5. Several annular circulation paths 7 are provided between the housing body 5 and the rotating disk 6. The housing body 5 has a circulation inlet pipe 51 and a circulation outlet pipe 52. A transition passage 61 is provided within the rotating disk 6. The medium enters the circulation path through the circulation inlet pipe 51 and flows out through the transition passage to the circulation outlet pipe 52. The circulation outlet pipe 52 communicates with an external container. The sealing device is installed on the circulation outlet pipe 52, which is installed within the mounting hole 12. The sealing body 1 is installed on the housing body 5. In this embodiment, the rotary actuator 8 is a motor.

[0059] In this embodiment, the sealing device is used as follows: When the valve body system is installed and inflation is required, the air compressor is turned on. The valve body opens due to external pressure. The air compressor connects to the expansion member 2 through the connecting pipe 32 and inflates the expansion chamber 21. When the current corresponding to the rotary actuator 8 of the valve body system is within the working range, inflation of the expansion chamber 21 stops. The valve body system starts operating. During operation, due to wear or compression, if the valve body system pressure becomes too high, the sealing member 31 will open to release the pressure until the current corresponding to the rotary actuator 8 returns to normal. The valve body system can indirectly reflect the pressure of the valve body system based on the current corresponding to the rotary actuator 8, thereby automatically adjusting the opening and closing of the filling or releasing valve to achieve automatic pressure regulation.

[0060] In this embodiment, the sealing body 1 is further provided with a limiting hole 14, and the valve body system further includes a limiting member 4, which is adapted to pass through the limiting hole 14 to lock with the housing body 5. The limiting hole 14 is a circular through hole, and the limiting member 4 is a hexagonal bolt. The setting of the limiting member 4 and the limiting hole 14 further ensures the reliability of the connection between the housing body 5 and the sealing body 1.

[0061] Experimental Example

[0062] This experimental example uses a multi-way valve device with a 1-inch diameter valve port on the housing body to conduct combined tests on the material of expansion element 2, the filling medium, and the sealing cross-sectional shape of expansion element 2. The selection of the driving component depends on the filling medium; for example, an air compressor is used for gaseous media, and a pump is used for liquid media.

[0063] In this embodiment, three flow lines contain aqueous solutions with 300 ppm calcium ions, 200 ppm zinc ions, and 100 ppm copper ions, respectively. During operation, the calcium, zinc, and copper ion content in the outflow from the three flow outlet pipes 52 is periodically monitored to determine if there are any leaks or cross-contamination issues in the system.

[0064]

[0065]

[0066] The system operated continuously for 24 hours a day for six months of testing. No significant leaks or damage to the sealing devices were observed in the valve body system, further demonstrating the stability, reliability, and operability of the sealing device. Furthermore, the system pressure data indicates that silicone rubber is more suitable for sealing the multi-way valve device used in this embodiment. Regardless of whether the filling medium is air, helium, or a 10% sodium chloride solution, the pressure must be maintained below 0.3 MPa to ensure safe and stable system operation. Square and M-shaped sealing rings can fit tightly against the sealing face of the multi-way valve, achieving a better sealing effect, with a pressure not exceeding 0.2 MPa.

[0067] Comparative Example

[0068] A rotary drive rotates a rotating disk, allowing material to be fed through three inlet pipes, which then flow into the outlet pipes via three annular passages and three transition passages. Specifically, the three inlet pipes respectively supply brine raw material, low-magnesium water, and demineralized water. The annular passage for brine raw material is located between the annular passage for low-magnesium water and the annular passage for demineralized water. This comparative example is used to detect cross-contamination in valve systems employing existing sealing devices and the sealing device provided in this application.

[0069] Line A: Select a valve port with a diameter of 1.5 inches in the body of the valve system, using the original system's built-in sealing strip and device, and the change curve of lithium ion content over time.

[0070] Line B: The valve port diameter of the body shell in the valve system is 1.5 inches. The original system's built-in sealing strip and device are used. The curve of magnesium ion content changing over time.

[0071] Line C: Select a valve port with a diameter of 1.5 inches in the housing body of the valve system, remove the original sealing strip, and replace it with the sealing device of this invention. The curve of lithium ion content versus time.

[0072] Line D: The curve showing the change in magnesium ion content over time after selecting a valve port with a diameter of 1.5 inches in the valve body system housing, removing the original sealing strip, and replacing it with the sealing device of this invention.

[0073] Both the C-line and the D-line use a sealing device. The sealing body 1 and the expansion component 2 are made of silicone. The driving component is an air compressor, and the medium for lifting in the expansion chamber 21 is air. An M-shaped sealing ring is used. After the expansion component 2 is filled with air by the air compressor, the pressure is maintained at 0.5 MPa.

[0074] Data shows that lines C and D, both using the sealing device described in this application, maintained stable product quality without fluctuations after more than 400 hours of system operation. However, lines A and B, using the original device, showed fluctuations in lithium and magnesium ions at 60h, 180h, and 192h of system operation, respectively. In particular, a sudden and abnormal increase in lithium and magnesium ions occurred at 180h, indicating that a system sealing malfunction caused brine to cross-contaminate the product in the detection tube.

[0075] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A valve body system, characterized by, Comprising: A sealing device, comprising: A driving member; A sealing body adapted to be mounted on a housing body, the sealing body having a mounting hole adapted to cooperate with a pipe body to be sealed, the sealing body having a mounting cavity; An expansion member mounted in the mounting cavity, the expansion member having an expansion cavity, the driving member being in communication with the expansion cavity; The mounting cavity is an annular cavity, the expansion member is an annular expansion member, the annular expansion member is mounted in the annular cavity, and the annular cavity is coaxially arranged with the mounting hole; The expansion member has an expansion state under the driving of the driving member, and the expansion cavity expands or shrinks to adjust and correct the deformation of the sealing body along the radial direction of the mounting hole towards the side of the pipe body to be sealed in real time; Further comprising: A housing body and a plurality of pipes to be sealed, the sealing body being mounted between the housing body and the pipes to be sealed for use in a multi-way valve device.

2. The valve body system according to claim 1, wherein The cross section of the expansion member is one of circular, square, rectangular, trapezoidal, M-shaped, D-shaped, C-shaped, and V-shaped.

3. The valve body system according to claim 1, wherein The material of the expansion member is natural rubber or synthetic rubber or composite rubber; The expansion member is made of one of silica gel, ethylene-propylene-diene rubber, nitrile rubber, fluororubber, fluorosilicone rubber, perfluorinated rubber, hydrogenated nitrile rubber, and fluorine-coated rubber.

4. The valve body system of claim 1, wherein, In the expansion state, the driving member is used to deliver a medium into the expansion cavity; The medium is gaseous, the medium is air or nitrogen; or the medium is liquid, the medium is one of water and inorganic salt solution.

5. The valve body system according to claim 1, wherein The sealing body comprises a communication hole in communication with the mounting cavity, and an opening of the communication hole away from the mounting cavity is arranged on an end face of the sealing body; A communication pipeline is further provided between the driving member and the expansion member, the communication pipeline is mounted in the communication hole, one end of the communication pipeline is in communication with the expansion cavity, and the other end of the communication pipeline is adapted to communicate with the driving member.

6. The valve body system according to claim 5, wherein Further comprising a plugging member detachably arranged on the end of the communication pipeline away from the expansion member, the plugging member being adapted to be enclosed with the expansion member and the communication pipeline to form a sealed space.

7. The valve body system according to claim 1, wherein The sealing body further comprises a limiting hole, and the valve body system further comprises a limiting member adapted to pass through the limiting hole to lock with the housing body.

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