Isolation valve

Abstract

The utility model relates to an isolating valve. The isolating valve comprises a valve assembly and a box body, the valve assembly comprises a valve body, a valve plate and a driving mechanism, the valve plate and the driving mechanism are installed on the valve body, and the driving mechanism is connected to the valve plate and drives the valve plate to move; the box body is provided with an assembling space, and a valve assembly is arranged in the assembling space. The box body comprises a plurality of mounting plates, the mounting plates are spliced to define an assembly space, each mounting plate comprises at least two laminates arranged in the thickness direction of the mounting plate, and a filler layer is arranged between any two adjacent laminates. The box body is provided with a plurality of mounting plates to facilitate stress dispersion, and the mounting plates are provided with at least two layer plates to enhance the structural strength of the box body, so that the box body has higher deformation resistance. Due to the arrangement of the packing layer, stress can be further dispersed, the supporting performance is improved, the box body can fully protect the structure of the valve assembly under the vibration condition, the valve assembly can stably operate under the vibration condition, and the overall shock resistance of the isolation valve is improved.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to an isolation valve. Background Art

[0002] An isolation valve is a valve used in piping systems. Its primary function is to shut off or isolate the flow of media to ensure the safety and maintenance of the piping system or equipment. Isolation valves are used in the ventilation systems of nuclear power plants. They are primarily installed in the ventilation ducts of the nuclear island or on the walls between two rooms, isolating the flow of air within the ventilation system. Nuclear power plants have strict seismic requirements for isolation valves. They must maintain integrity during high-intensity earthquakes and remain functional during and after an earthquake to ensure a safe shutdown of the plant.

[0003] Existing isolation valves cannot maintain normal operation under vibration, resulting in leakage and accidents, so the seismic resistance performance needs to be improved. Utility Model Content

[0004] Based on this, it is necessary to provide an isolation valve that can improve the ability to maintain stable operation and sealing under vibration conditions.

[0005] An isolation valve comprises a valve assembly and a housing; the valve assembly comprises a valve body, a valve plate and a driving mechanism, the valve plate and the driving mechanism are respectively mounted on the valve body, the driving mechanism is connected to the valve plate and drives the valve plate to move; the housing is provided with an assembly space, in which the valve assembly is arranged; the housing comprises a plurality of mounting plates, which are spliced ​​together to enclose the assembly space, each mounting plate comprising at least two layer plates arranged along its own thickness direction, and a packing layer is provided between any two adjacent layer plates.

[0006] It is understood that the multiple mounting plates within the enclosure facilitate stress distribution, and the mounting plates are configured with at least two layers to enhance the enclosure's structural strength and provide greater resistance to deformation. The inclusion of a packing layer further disperses stress and improves support, allowing the enclosure to fully protect the valve assembly structure under vibration, ensuring smooth operation under these conditions and improving the isolation valve's overall seismic resistance.

[0007] In one embodiment, in each of the mounting plates, at least one of any two adjacent layer plates is provided with a bending section at its edge, and any two adjacent layer plates are fastened together by the bending section.

[0008] In one embodiment, the box body includes multiple mounting plates, which are spliced ​​together to enclose the assembly space, and the mounting plates form the wall body. Each of the mounting plates includes at least two layer plates arranged along its own thickness direction, and a filler space is provided between any two adjacent layer plates.

[0009] In one embodiment, in each of the mounting plates, at least one of any two adjacent layer plates is provided with a bending section at its edge, and any two adjacent layer plates are fastened together by the bending section.

[0010] In one embodiment, in each of the mounting plates, one of any two adjacent layer plates is provided with a bending section, the bending section is provided with an insertion groove, or the bending section and the corresponding layer plate are jointly arranged to form an insertion groove, and the edge of the other layer plate is inserted into the insertion groove and pressed against the groove wall.

[0011] In one embodiment, in any two adjacent mounting plates, at least a portion of the bending section in one of the mounting plates protrudes from the side of the corresponding layer plate facing away from the other layer plate, and an assembly section is provided at the edge of the other mounting plate, and the assembly section is inserted into the insertion groove of the bending section, and the assembly section is clamped between the other layer plate and the groove wall of the insertion groove.

[0012] In one embodiment, the bending section includes a first bending arm, a second bending arm and a third bending arm, the first bending arm is connected to the edge of the corresponding layer plate and extends in a direction away from the other layer plate, the second bending arm is connected to the extended end of the first bending arm and is at an angle to the first bending arm, the third bending arm is connected to one end of the second bending arm away from the first bending arm and is at an angle to the second bending arm, and the third bending arm extends in a direction close to the other layer plate, and the three are arranged to form the insertion groove.

[0013] In one embodiment, the box further includes a locking structure, and any two adjacent mounting plates are locked by the locking structure.

[0014] In one embodiment, at least part of the installation plates are provided with support columns, and in the installation plates, any two adjacent layer plates are connected with the support columns.

[0015] In one embodiment, the packing layer is made of flame-retardant material; and / or, the packing layer includes a packing and a reinforcement structure, the reinforcement structure is provided with a reinforcement segment, any two adjacent reinforcement segments are connected and arranged at an angle, the two ends of each reinforcement segment are respectively pressed onto the layer plate, and the packing fills the gap between the reinforcement structure and the layer plate.

[0016] In one embodiment, the wall thickness of the box body is H, 25mm≤H≤35mm; and / or, the thickness of each layer is the same, the thickness of the flame retardant material layer is h1, the thickness of each layer is h2, h1=(15~20)h2.

[0017] In one embodiment, the box body is provided with an inlet and an outlet connected to the assembly space and arranged at intervals; the isolation valve also includes a valve body, the valve body is arranged in the assembly space, the valve body is provided with a valve cavity connected to the inlet and the outlet, at least one side of the valve body is pressed tightly against the inner wall of the box body, and a shock-absorbing cavity is provided between the valve body and the box body.

[0018] In one embodiment, the inlet and the outlet are arranged opposite to each other along a first direction; the valve body is constructed with a connecting portion on at least one side along the first direction, the connecting portion has a mating section and an extension section, the extension section is connected to an end of the mating section away from the valve cavity and is arranged at an angle to the mating section, the mating section is pressed on the inner wall of the box body and is detachably connected to the inner wall of the box body.

[0019] In one embodiment, the valve plate is arranged in the valve cavity, and a valve port is protruding from the cavity wall of the valve cavity; the driving mechanism is used to drive the valve plate to move in the valve cavity to seal or open the valve port; the valve assembly also includes a sealing structure, which is arranged at the valve port and is used to press and seal with the valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A partial structural cross-sectional view of the isolation valve provided for this application;

[0022] Figure 2 A partial structural cross-sectional view of the box body in the isolation valve provided in this application;

[0023] Figure 3 A schematic diagram of the structure of the box provided for this application;

[0024] Figure 4 A cross-sectional view of the interior of the valve body of the isolation valve provided in this application in one direction;

[0025] Figure 5This is a cross-sectional view of the interior of the valve body of the isolation valve provided in this application from another direction.

[0026] Reference numerals: 100, isolation valve; 10, housing; 101, assembly space; 1011, shock-absorbing chamber; 102, inlet; 103, outlet; 104, mounting plate; 1041, layer plate; 10411, bending section; 10412, insertion groove; 11, first mounting plate; 111, first layer plate; 1111, first bending arm; 1112, second bending arm; 1113, third bending arm; 112, second layer plate; 1121, fourth bending arm; 12, second mounting plate; 121, third layer plate; 1211, fifth bending arm; 1212, sixth bending arm; 122. Fourth layer; 13. Packing layer; 131. Packing; 132. Reinforcement structure; 1321. Reinforcement section; 14. Support column; 20. Valve body; 201. Valve cavity; 202. Valve port; 21. Connecting portion; 211. Fitting section; 212. Extension section; 30. Valve plate; 40. Driving mechanism; 41. Transmission shaft; 42. Swing arm; 43. Connecting rod assembly; 431. First swing arm; 432. Second swing arm; 433. Transmission rod; 434. Threaded portion; 435. Fitting portion; 44. Active shaft; 45. Power source; 50. Sealing structure; 60. Limiter. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0028] It should be noted that when a component is referred to as being "fixed to" or "provided on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0030] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0032] See also Figures 1 to 5 The present application provides an isolation valve 100, which includes a valve assembly, wherein the valve assembly includes a valve body 20, a valve plate 30 and a driving mechanism 40, the valve plate 30 and the driving mechanism 40 are respectively installed on the valve body 20, and the driving mechanism 40 is connected to the valve plate 30 and drives the valve plate 30 to move to realize the opening and closing of the isolation valve 100.

[0033] Furthermore, the isolation valve 100 includes a housing 10, which further defines an assembly space 101, within which a valve assembly is located. The housing 10 includes multiple mounting plates 104, which are joined together to enclose the assembly space 101. This arrangement allows the multiple mounting plates 104 to disperse stress and mitigate impact when subjected to vibration, reducing the risk of damage to the entire housing 10. This also reduces resonance within the housing 10 during vibration, thereby minimizing the impact of vibration on the housing 10.

[0034] Specifically, each mounting plate 104 includes at least two layers 1041 arranged along its own thickness direction. This configuration ensures that the box body 10 has sufficient stability even under vibration conditions, enhances the structural strength of the box body 10, and is not easily deformed or cracked under external pressure, thereby protecting the normal operation of the inside of the box body 10 and better avoiding fluid leakage.

[0035] In each mounting plate 104, a filler layer 13 is provided between any two adjacent layer plates 1041. The corresponding filler 131 can be filled according to actual needs to form a filler layer 13. The filler 131 can disperse stress and help enhance the structural strength of the mounting plate 104. When squeezed, the filler 131 can support the layer plates 1041, thereby improving the deformation resistance of the layer plates 1041, which is beneficial to improving the overall seismic resistance of the mounting plate 104.

[0036] In summary, the wall of the box body 10 is provided with at least two layer plates 1041 and a filling space is provided between two adjacent layer plates 1041, which is beneficial to enhancing the seismic strength of the box body 10, thereby improving the overall seismic performance of the isolation valve 100, and improving the ability of the isolation valve 100 to maintain stable operation under vibration conditions.

[0037] like Figure 1 As shown, in a specific embodiment, the packing layer 13 is made of a flame-retardant material. This configuration not only enhances shock resistance, but also prevents combustion of the housing 10 when the ambient temperature rises or a fire occurs in the ambient environment. It also resists the effects of high temperatures on the operation of the valve disc 30 and the drive mechanism 40, thereby maintaining the structural integrity of the valve body 20, valve disc 30, etc. within the housing 10 and promoting the normal operation of the isolation valve 100. Exemplary flame-retardant materials may include aluminum hydroxide, borate, aramid fiber, etc.

[0038] like Figure 1 As shown, in a specific embodiment, the packing layer 13 includes a packing 131 and a reinforcement structure 132. The reinforcement structure 132 is provided with a reinforcement section 1321. Any two adjacent reinforcement sections 1321 are connected and arranged at an angle. The two ends of each reinforcement section 1321 are respectively pressed onto the layer plate 1041, and the packing 131 fills the gap between the reinforcement structure 132 and the layer plate 1041. Through this design, the reinforcement structure 132 not only provides additional mechanical strength for the packing layer 13, but also can effectively disperse and absorb vibration energy through the angle setting, further improving the seismic performance of the isolation valve 100. The connection method of the reinforcement section 1321 ensures that the packing 131 will not shift from the gap when vibration occurs, thereby maintaining the integrity and uniformity of the packing layer 13. In addition, the tight pressing between the reinforcement structure 132 and the layer plate 1041 also enhances the fixing effect between the layer plates 1041, making the structure of the entire box body 10 more stable.

[0039] In a specific embodiment, a plurality of mounting plates 104 are spliced ​​together to form a rectangular or cube-shaped box body 10 structure.

[0040] In an optional embodiment, at least one of any two adjacent layer plates 1041 in each mounting plate 104 has a bent section 10411 at its edge. The bent section 10411 secures the two adjacent layer plates 1041 together. The provision of the bent section 10411 facilitates enclosing a space for the packing layer 13, completely enveloping the packing and ensuring a tight seal. For example, the layer plates 1041 can be made of materials such as stainless steel and carbon steel to provide good structural strength.

[0041] In an optional embodiment, in each mounting plate 104, one of any two adjacent layer plates 1041 is provided with a bending section 10411, the bending section 10411 is provided with an insertion groove 10412, or the bending section 10411 and the corresponding layer plate 1041 are jointly arranged to form an insertion groove 10412, and the edge of the other layer plate 1041 is inserted into the insertion groove 10412 and pressed against the groove wall to form an assembly limit between the two adjacent layer plates 1041, thereby forming a stable and reliable mounting plate 104 structure.

[0042] In an optional embodiment, among any two adjacent mounting plates 104, at least a portion of the bent section 10411 in one mounting plate 104 protrudes from the side of the corresponding layer plate 1041 facing away from the other layer plate 1041, and an assembly section is provided at the edge of the other mounting plate 104. The assembly section is inserted into the insertion groove 10412 of the bent section 10411, and the assembly section is clamped between the other layer plate 1041 and the groove wall of the insertion groove 10412, so as to form an assembly limit between the two mounting plates 104, thereby forming a stable and reliable box body 10 structure.

[0043] like Figure 1 As shown, for the sake of convenience, one of any two adjacent mounting plates 104 is defined as the first mounting plate 11, and the other is defined as the second mounting plate 12; any two adjacent layer plates 1041 in the first mounting plate 11 are defined as the first layer plate 111 and the second layer plate 112, and any two adjacent layer plates 1041 in the second mounting plate 12 are defined as the third layer plate 121 and the fourth layer plate 122.

[0044] Furthermore, a bending section 10411 is provided on the edge of the first layer plate 111 and a corresponding insertion groove 10412 is formed. The edge of the second layer plate 112 is bent toward the first layer plate 111 to form an insertion portion, and the insertion portion is inserted into the insertion groove 10412. In this way, the first layer plate 111 and the second layer plate 112 are limited and fixed, and a filling space is formed between the first layer plate 111 and the second layer plate 112, which is easy to operate.

[0045] Furthermore, the edge of the third layer board 121 is bent toward the fourth layer board 122 and adhered to the fourth layer board 122 to form an assembly section. In this way, a filling space is formed between the third layer board 121 and the fourth layer board 122, and the structure is simple.

[0046] Furthermore, the assembly section formed by the third and fourth layer boards 121, 122 is inserted into the insertion slot 10412. In the insertion slot 10412, the fourth layer board 122 fits between the third and second layer boards 121, 112. Thus, the cavity wall of the insertion slot 10412 can restrict the movement of the third and fourth layer boards 121, 122, thereby achieving assembly and positioning between the first and second mounting boards 11, 12, and simplifying operation.

[0047] In an optional embodiment, the box body 10 also includes a locking structure, which is at least partially assembled in the insertion groove 10412 and is used to lock the first layer board 111, the second layer board 112, the third layer board 121 and the fourth layer board 122, so that the first mounting plate 11 and the second mounting plate 12 are completely fixed to ensure the structural strength of the box body 10.

[0048] For example, the locking structure may be configured as a screw or the locking structure may include a bolt and a nut, wherein the bolt passes through each layer plate 1041 and cooperates with the nut to complete the locking.

[0049] like Figure 2 As shown, in a specific embodiment, the bending section 10411 includes a first bending arm 1111, a second bending arm 1112 and a third bending arm 1113. The first bending arm 1111 is connected to the edge of the corresponding layer plate 1041 (that is, the first layer plate 111) and extends in a direction away from the other layer plate 1041 (that is, the second layer plate 112). The second bending arm 1112 is connected to the extended end of the first bending arm 1111 and is at an angle to the first bending arm 1111. The third bending arm 1113 is connected to one end of the second bending arm 1112 away from the first bending arm 1111 and is at an angle to the second bending arm 1112. The third bending arm 1113 extends in a direction close to the other layer plate 1041 (that is, the second layer plate 112). The three are arranged to form an insertion groove 10412. The edge of the second layer plate 112 is bent toward the first layer plate 111 to form a fourth bending arm 1121 . The fourth bending arm 1121 forms an inserting portion inserted into the inserting groove 10412 .

[0050] like Figure 2As shown, further, the third layer plate 121 is constructed with a fifth bending arm 1211 and a sixth bending arm 1212, the fifth bending arm 1211 and the sixth bending arm 1212 are at an angle, the edge of the third layer plate 121 is bent toward the fourth layer plate 122 to form the fifth bending arm 1211, the sixth bending arm 1212 is connected to the extended end of the fifth bending arm and is attached to the fourth layer plate 122, the sixth bending arm 1212 and the fourth layer plate 122 are jointly inserted into the insertion groove 10412, the sixth bending arm 1212 is attached between the fourth layer plate 122 and the third bending arm 1113 to form the fixation of the third layer plate 121 and the fourth layer plate 122 relative to the first layer plate 111, the first layer plate 111 can accommodate the second layer plate 112, the third layer plate 121 and the fourth layer plate 122 and limit them by bending. The structure is simple and easy to process.

[0051] like Figure 2 As shown, in a specific embodiment, the second bending arm 1112 is configured to be curved to form a good transition between the first bending arm 1111 and the third bending arm 1113, thereby alleviating stress concentration and improving shock resistance.

[0052] like Figure 1 and Figure 2 As shown, in a specific embodiment, the first bending arm 1111 extends toward a side away from the valve body 20, which is beneficial for dispersing the vibration to the outside, reducing the vibration impact, and improving the anti-seismic performance.

[0053] like Figure 1 As shown, in some embodiments, support columns 14 are provided in at least a portion of the mounting plate 104. In the mounting plate 104, a support column 14 is connected between any two adjacent layer plates 1041. In this way, the support columns 14 can enhance the support between the two adjacent layer plates 1041, thereby improving the structural rigidity of the entire mounting plate 104 and making the mounting plate 104 more resistant to deformation.

[0054] like Figure 1 As shown, in a specific embodiment, the wall thickness of the box 10 is H, 25mm≤H≤35mm, to ensure that the box 10 has sufficient structural strength while also avoiding excessive thickness that causes the box 10 to be too heavy. For example, H=25mm, 30mm or 35mm.

[0055] like Figure 2As shown, in a further embodiment, each layer 1041 has the same thickness, eliminating the need to select layers 1041 of different thicknesses for assembly, thereby improving production efficiency. Specifically, the thickness of the packing layer 13 is h1, and the thickness of each layer 1041 is h2, where h1 = (15-20)h2. In this way, the thinner thickness of the layers 1041 prevents the box 10 from being too heavy, facilitating lightweight production of the box 10. A thicker packing layer 13 effectively blocks high temperatures and open flames. For example, h1 = 15h2, 18h2, or 20h2.

[0056] In an optional embodiment, the housing 10 is provided with an inlet 102 and an outlet 103 spaced apart from each other, each of which is in communication with the assembly space 101. The isolation valve 100 further includes a valve body 20, which is disposed within the assembly space 101 and connected to the housing 10. The valve body 20 defines a valve cavity 201 that communicates with the inlet 102 and the outlet 103. A valve port 202 is protruding from the wall of the valve cavity 201. When fluid is in communication, fluid can enter the housing 10 through the inlet 102, flow through the valve port 202, and then flow out of the outlet 103 of the housing 10. The configuration of the housing 10 resists vibration, protects the valve body 20 within the assembly space 101, and maintains the structural integrity of the valve body 20 and its components.

[0057] like Figure 1 As shown, in an optional embodiment, along the first direction, the inlet 102 and the outlet 103 are arranged relative to each other, which is conducive to the straight in and out of the fluid and accelerates the fluid circulation.

[0058] In an optional embodiment, at least one side of the valve body 20 is pressed against the inner wall of the box body 10, and a shock-absorbing chamber 1011 is provided between the valve body 20 and the box body 10, which helps to reduce vibration, promote the normal operation of components inside the valve body 20, and help reduce the noise generated by the operation of the isolation valve 100.

[0059] like Figure 1 As shown, further, the valve body 20 is constructed with a connecting portion 21 on at least one side along the first direction, and the connecting portion 21 is detachably connected to the box body 10, which is convenient for disassembly and assembly, and is easy to repair and replace. For ease of explanation, the first direction is the axial direction of the valve port 202.

[0060] like Figure 1As shown, in a specific embodiment, the connecting portion 21 has a mating section 211 and an extension section 212. The extension section 212 is connected to the end of the mating section 211 away from the valve cavity 201 and is arranged at an angle to the mating section 211. The mating section 211 is attached to the inner wall of the housing 10, so that there is a large mating area between the mating section 211 and the valve body 20. Furthermore, the mating section 211 is detachably connected to the inner wall of the housing 10 to facilitate disassembly at any time. Among them, the extension section 212 is provided to disperse the stress generated during the connection of the mating section 211, strengthen the assembly stability of the mating section 211, and promote a more stable connection between the entire valve body 20 and the housing 10. Under vibration conditions, the vibration is buffered by the housing 10 and then transmitted to the connecting portion. The extension section 212 can further disperse the vibration outward, reducing the impact of the vibration on the internal parts of the valve body 20, which is beneficial to improving the operating stability of the valve disc 30 and the drive mechanism 40 in the valve body 20 under vibration conditions.

[0061] Furthermore, the isolation valve 100 includes a valve disc 30 and a drive mechanism 40. The valve disc 30 is disposed within the valve cavity 201. The drive mechanism 40 is connected to the valve disc 30 and is used to drive the valve disc 30 to move within the valve cavity 201 to block or open the valve port 202. In this way, the drive mechanism 40 can provide power to the valve disc 30, and the movement of the valve disc 30 can realize the opening and closing of the valve port 202, which is simple to operate.

[0062] Furthermore, the sealing structure 50 is provided at the valve port 202 and is used to compress and seal with the valve plate 30. The provision of the sealing structure 50 is conducive to enhancing the sealing performance of the valve plate 30 when it is blocked, and is conducive to maintaining the seal under vibration conditions, thereby reducing or avoiding fluid leakage.

[0063] like Figure 1 As shown, in an optional embodiment, the driving mechanism 40 includes a transmission shaft 41 and a rotary arm 42 connected to the transmission shaft 41. The end of the rotary arm 42 away from the transmission shaft 41 is connected to the valve plate 30. The rotary arm 42 drives the valve plate 30 to move as the transmission shaft 41 rotates. The valve plate 30 can follow the rotation of the transmission shaft 41, thereby achieving the purpose of blocking or opening the valve port 202, and the operation is simple.

[0064] When the valve disc 30 moves away from the valve port 202, the valve disc 30 first makes a straight motion relative to the valve port 202, and then makes a rotational motion relative to the valve port 202. This arrangement reduces the friction between the valve disc 30 and the sealing structure 50 during the separation process, reduces the loss caused by friction to the valve disc 30 and the sealing structure 50, and helps to extend the practical life of the sealing structure 50.

[0065] In a specific embodiment, the sealing structure 50 is generally made of radiation-resistant silicone rubber material, which is beneficial for maintaining good sealing performance in a radiation environment.

[0066] like Figure 4As shown, in a further embodiment, the drive mechanism 40 further includes a power source 45, a driving shaft 44, and a connecting rod assembly 43. The driving shaft 44 is connected to the power source 45. The input end of the connecting rod assembly 43 is connected to the driving shaft 44, and the output end of the connecting rod assembly 43 is connected to the transmission shaft 41. In this way, the power source 45 can provide power for the rotation of the valve disc 30. The power source 45 transmits power to the driving shaft 44, which in turn inputs power to the connecting rod assembly 43. The connecting rod assembly 43 then transmits power to the transmission shaft 41. The rotary arm 42 on the transmission shaft 41 then drives the valve disc 30 to rotate, thereby opening and closing the valve port 202. The provision of the connecting rod assembly 43 to transmit power facilitates the bearing of large loads.

[0067] In a specific embodiment, the power source 45 is configured as a motor, and a speed reducer may be further provided between the motor and the driving shaft 44 to reduce the rotation speed and promote smooth opening and closing of the valve plate 30 .

[0068] like Figure 1 As shown, in an optional embodiment, the isolation valve 100 further includes a limiter 60, which is assembled in the valve body 20 and is used to limit the movement of the valve disc 30 away from the valve port 202, that is, to limit the rotation angle of the valve disc 30 to prevent the valve disc 30 from continuing to rotate and interfering with the valve body 20.

[0069] like Figure 5 As shown, in a specific embodiment, the connecting rod assembly 43 includes a first swing arm 431, a second swing arm 432, and a transmission rod 433. The transmission rod 433 is connected to the first swing arm 431 at one end along its own axis, and to the second swing arm 432 at the other end. The first swing arm 431 is connected to the transmission shaft 41, and the second swing arm 432 is connected to the driving shaft 44. In this way, the driving shaft 44 can transmit power to the second swing arm 432, which rotates accordingly and transmits the power to the first swing arm 431 through the transmission rod 433, thereby driving the first swing arm 431 to swing. The swing of the first swing arm 431 drives the transmission shaft 41 to rotate, realizing step-by-step power transmission.

[0070] like Figure 5As shown, in a further embodiment, the first swing arm 431 and the second swing arm 432 are each provided with a threaded portion 434. The transmission rod 433 is provided with mating portions 435 at both ends along its axis. The threaded portion 434 and the mating portion 435 are threadedly mated. One of the threaded portion 434 and the mating portion 435 is internally threaded, and the other is externally threaded. In this manner, after the valve disc 30 rotates until it is pressed against the sealing structure 50, the transmission rod 433 can be screwed to further swing the first and second swing arms 431 and 432, thereby driving the valve disc 30 to further press against the sealing structure 50 and enhance sealing performance. By providing a nut on the threaded portion 434, the transmission rod 433 can be locked relative to the first and second swing arms 431 and 432 by screwing the nut.

[0071] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. An isolation valve, characterized in that: include: A valve assembly comprises a valve body (20), a valve plate (30) and a driving mechanism (40), wherein the valve plate (30) and the driving mechanism (40) are respectively mounted on the valve body (20), and the driving mechanism (40) is connected to the valve plate (30) and drives the valve plate (30) to move; A box body (10) is provided with an assembly space (101), wherein the valve assembly is provided in the assembly space (101); the box body (10) comprises a plurality of mounting plates (104), wherein the plurality of mounting plates (104) are spliced ​​together to enclose the assembly space (101), wherein each mounting plate (104) comprises at least two layer plates (1041) arranged along its own thickness direction, and a packing layer (13) is provided between any two adjacent layer plates (1041).

2. The isolation valve according to claim 1, characterized in that In each of the mounting plates (104), at least one of any two adjacent layer plates (1041) is provided with a bending section (10411) at its own edge, and any two adjacent layer plates (1041) are fastened together by the bending section (10411).

3. The isolation valve according to claim 2, characterized in that In each of the mounting plates (104), one of any two adjacent layer plates (1041) is provided with a bending section (10411), the bending section (10411) is provided with an insertion groove (10412), or the bending section (10411) and the corresponding layer plate (1041) are jointly arranged to form an insertion groove (10412), and the edge of the other layer plate (1041) is inserted into the insertion groove (10412) and pressed against the groove wall.

4. The isolation valve according to claim 3, characterized in that In any two adjacent mounting plates (104), at least a portion of the bending section (10411) in one of the mounting plates (104) protrudes from the side of the corresponding layer plate (1041) facing away from the other layer plate (1041), and an assembly section is provided on the edge of the other mounting plate (104), and the assembly section is inserted into the insertion groove (10412) of the bending section (10411), and the assembly section is clamped between the other layer plate (1041) and the groove wall of the insertion groove (10412).

5. The isolation valve according to claim 4, characterized in that The bending section (10411) includes a first bending arm (1111), a second bending arm (1112) and a third bending arm (1113), wherein the first bending arm (1111) is connected to the edge of the corresponding layer plate (1041) and extends in a direction away from the other layer plate (1041), the second bending arm (1112) is connected to the extended end of the first bending arm (1111) and forms an angle with the first bending arm (1111), the third bending arm (1113) is connected to one end of the second bending arm (1112) away from the first bending arm (1111) and forms an angle with the second bending arm (1112), and the third bending arm (1113) extends in a direction close to the other layer plate (1041), and the three are arranged to form the insertion slot (10412).

6. The isolation valve according to claim 1, characterized in that The box body (10) further comprises a locking structure, and any two adjacent mounting plates (104) are locked via the locking structure.

7. The isolation valve according to claim 1, characterized in that At least a portion of the installation plates (104) is provided with support columns (14), and in the installation plates (104), any two adjacent layer plates (1041) are connected with the support columns (14).

8. The isolation valve according to claim 1, wherein: The packing layer (13) is made of a flame-retardant material; and / or the packing layer (13) comprises a packing (131) and a reinforcement structure (132), the reinforcement structure (132) is provided with a reinforcement section (1321), any two adjacent reinforcement sections (1321) are connected and arranged at an angle, the two ends of each reinforcement section (1321) are respectively pressed onto the layer plate (1041), and the packing (131) fills the gap between the reinforcement structure (132) and the layer plate (1041).

9. The isolation valve according to claim 8, characterized in that The wall thickness of the box body (10) is H, 25mm≤H≤35mm; and / or, the thickness of each layer plate (1041) is the same, the thickness of the filler layer (13) is h1, the thickness of each layer plate (1041) is h2, and h1=(15-20)h2.

10. The isolation valve according to claim 1, wherein: The box body is provided with an inlet (102) and an outlet (103) which are connected to the assembly space (101) and are spaced apart. The valve body (20) is provided with a valve cavity (201) communicating with the inlet (102) and the outlet (103); at least one side of the valve body (20) is tightly connected to the inner wall of the box body (10); and a shock-absorbing cavity (1011) is provided between the valve body (20) and the box body (10).

11. The isolation valve according to claim 10, characterized in that Along the first direction, the inlet (102) and the outlet (103) are arranged opposite to each other; The valve body (20) is constructed with a connecting portion (21) on at least one side along the first direction, and the connecting portion (21) has a fitting section (211) and an extension section (212), the extension section (212) is connected to one end of the fitting section (211) away from the valve cavity (201) and is arranged at an angle to the fitting section (211), and the fitting section (211) is pressed against the inner wall of the box body (10) and is detachably connected to the inner wall of the box body (10).

12. The isolation valve according to claim 10, characterized in that The valve disc (30) is arranged in the valve cavity (201), and a valve opening (202) is protruding from the cavity wall of the valve cavity (201); the driving mechanism (40) is used to drive the valve disc (30) to move in the valve cavity (201) to block or open the valve opening (202); The valve assembly further comprises a sealing structure (50), wherein the sealing structure (50) is arranged at the valve port (202) and is used for compressing and sealing with the valve plate (30).

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