A false operation prevention locking mechanism of a quick cutting blind plate valve

Abstract

The present application relates to the technical field of valve, in particular to a kind of quick cut blind plate valve anti-misoperation locking mechanism.It includes support, two sealing elements are fixedly connected in the top of support, sealing element one side outer wall is fixedly connected with valve body, blind plate body is clamped between the two sealing elements, recess is equipped in one side outer wall of blind plate body, locking assembly is equipped between the recess inside blind plate body and the inside of one sealing element;Locking assembly includes clamping plate, clamping plate is movably connected between the recess of blind plate body and the inside of sealing element, pneumatic element is equipped between the outer wall of sealing element and valve body, elastic element is equipped between the inside of pneumatic element and the end of clamping plate;Elastic element is used for adjusting the locking state of clamping plate in blind plate body during elastic contraction, elastic element also drives pneumatic element to expand and contract during elastic contraction, the expansion and contraction of pneumatic element is used to prompt the locking state of clamping plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve, in particular to a kind of anti-misoperation locking mechanism of fast-cut blind plate valve. BACKGROUND

[0002] Fast-cut blind plate valve is a special valve used in pipeline system, mainly used for quickly isolating or switching the medium flow in pipeline. It is usually used in occasions requiring frequent switching or isolation, especially in chemical, petroleum, natural gas, pharmaceutical and other industries, which can effectively improve the operation efficiency and ensure safety.

[0003] The working principle of fast-cut blind plate valve is to drive the blind plate to move quickly in the valve body by driving mechanism, to realize the opening or closing of pipeline; when the blind plate moves to the closed position, it tightly fits with the valve seat, forming a bidirectional seal, completely blocking the medium flow; when the blind plate moves to the open position, the medium can pass through the valve freely; the core of fast-cut blind plate valve lies in the quick switching and reliable sealing of blind plate, its design usually includes guiding device to ensure smooth movement of blind plate, and anti-misoperation locking mechanism to prevent the valve from being operated in wrong state.

[0004] In existing blind plate valves, some valves realize the switching of sealing state by power drive (such as pneumatic, electric or hydraulic), thereby reducing the dependence on manual operation; however, in some cases, if sudden situations such as mechanical failure, power system failure or power failure occur, manual intervention is still needed to drive the switching; the existing manual operation method has certain limitations, the operator may not be able to accurately judge the valve state due to visual error, or the valve may not be completely closed or opened due to non-standard operation, locking mechanism failure and other reasons, thereby causing leakage problem; compared with the prior art, although power drive improves the automation degree of valve, the reliability and convenience of manual operation still need to be further improved when dealing with sudden situations.

[0005] In view of this, the present application provides an anti-misoperation locking mechanism of fast-cut blind plate valve. SUMMARY

[0006] The purpose of the present application is to provide an anti-misoperation locking mechanism of fast-cut blind plate valve, which ensures that the blind plate body can be reliably locked in the closed or open position through the linkage design of elastic member and pneumatic member, and provides intuitive visual feedback for the operator through the expansion and contraction state (such as the expansion or contraction of balloon) of pneumatic member, effectively preventing misoperation and leakage risk, improving the safety and operation convenience of valve, thereby solving the problems raised in the above background art, i.e.

[0007] In the prior art, the quick cutting blind plate valve may cause incomplete closing or opening due to visual error, non-standard operation or failure of locking mechanism, etc., when power drive fails or manual operation is performed, thereby causing leakage problem.

[0008] To achieve the above object, the blind plate valve comprises a support, two sealing members are fixedly connected to the top of the support, a valve body is fixedly connected to one side outer wall of the sealing member, a blind plate body is clamped between the two sealing members, a driving assembly is arranged between the blind plate body and the two sealing members, a recess is arranged on one side outer wall of the blind plate body, and a locking assembly is arranged between the recess of the blind plate body and the inside of one of the sealing members.

[0009] The locking assembly comprises a clamping plate, the clamping plate is movably clamped between the recess of the blind plate body and the inside of the sealing member, a pneumatic member is arranged between the outer wall of the sealing member and the valve body, an elastic member is arranged between the inside of the pneumatic member and the end of the clamping plate.

[0010] The elastic contraction process of the elastic member is used to adjust the locking state of the clamping plate in the blind plate body, and the elastic member also drives the pneumatic member to expand and contract in the process of elastic contraction, and the expansion and contraction of the pneumatic member is used to prompt the locking state of the clamping plate.

[0011] In the above technical solution, because the elastic member and the pneumatic member are designed in linkage, when the blind plate body moves to the closed or open position, the elastic contraction of the elastic member pushes the clamping plate to be clamped into the recess of the blind plate body, thereby realizing reliable locking of the blind plate body and preventing accidental movement; at the same time, the contraction of the elastic member also drives the expansion or contraction of the pneumatic member (such as a balloon), and the intuitive change (such as the expansion or contraction of the balloon) of the state of the pneumatic member provides clear visual feedback for the operator, thereby facilitating the judgment of the locking state of the valve. In addition, the expansion and contraction state of the pneumatic member can also serve as an auxiliary prompt to help the operator accurately judge whether the valve is completely closed or opened when manual intervention is performed, thereby effectively avoiding the leakage problem caused by visual error or non-standard operation.

[0012] Further, due to the linkage design of the pneumatic member (such as a balloon) and the elastic member, even in the case of power drive failure or power failure, the locking mechanism can still realize automatic locking through the elastic action of the elastic member, and provide operation prompt through the state change of the pneumatic member, thereby significantly improving the safety and operation convenience of the valve.

[0013] In another technical solution, the driving assembly comprises three rotating rods, the three rotating rods are movably connected at the triangular place between the two sealing members, and one of the rotating rods is fixedly connected to the blind plate body at the outer wall between the two sealing members.

[0014] The end of the rotating rod is fixedly connected with a gear, three gears are meshed and connected with a chain, two ends of two gears are fixedly connected with a rotating disc, and the other gear is provided with a motor.

[0015] The linkage of the gear, chain and rotating rod realizes the quick and accurate switching of the blind plate body. Specifically, when the motor drives one of the gears to rotate, the other two gears are driven to rotate synchronously through the chain, and the three rotating rods are driven to move cooperatively, pushing the blind plate body to move quickly between the sealing elements, realizing the opening or closing of the valve. In addition, the design of the rotating disc facilitates manual operation when the motor fails or power failure, ensuring that the valve can still be switched normally in an emergency.

[0016] Compared with the prior art, the beneficial effects of the present application are:

[0017] The linkage of the elastic member and the pneumatic member ensures that the blind plate body can be locked in time when it is in the closed or open position, preventing the valve from not being completely closed or opened due to non-standard operation or failure of the locking mechanism, thereby effectively avoiding leakage problems; at the same time, the expansion and contraction state of the pneumatic member provides intuitive visual feedback for the operator, facilitating accurate judgment of the valve state, significantly reducing the risk caused by visual errors or human operation errors; in addition, the locking mechanism can still realize automatic locking through the elastic action of the elastic member in the event of power failure or power failure, and provide operation prompts through the state change of the pneumatic member, such as:

[0018] Visual state indication: the inflation or contraction state of the balloon directly shows the locking state (inflation indicates that it is locked, and contraction indicates that it is not locked);

[0019] Abnormal situation warning: when the balloon does not inflate completely, it indicates that there may be a possibility of card plate wear or gas leakage; and if the balloon shakes abnormally, it indicates that the system may have a pressure instability problem. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall front structure of the present application;

[0021] Figure 2 is a schematic diagram of the overall back structure of the present application;

[0022] Figure 3 is a schematic diagram of the blind plate body driving structure of embodiment 1 of the present application;

[0023] Figure 4 is a schematic diagram of the driving assembly structure of embodiment 1 of the present application;

[0024] Figure 5 is an exploded view of the internal structure of the sealing element of embodiment 1 of the present application;

[0025] Figure 6 Structure diagram of the locking assembly of the embodiment 1 of the present application;

[0026] Figure 7 Structure diagram of the locking assembly of the embodiment 1 of the present application;

[0027] Figure 8 Structure diagram of the elastic member of the embodiment 1 of the present application;

[0028] Figure 9 Structure diagram of the elastic member of the embodiment 1 of the present application;

[0029] Figure 10 Structure diagram of the elastic member of the embodiment 1 of the present application;

[0030] The meanings of the respective numbers in the figures are as follows:

[0031] 1, support; 11, sealing member; 12, valve body;

[0032] 13, driving assembly; 130, rotating rod; 131, gear; 132, chain; 133, rotating disc;

[0033] 14, blind plate body;

[0034] 15, locking assembly; 150, clamping plate; 151, elastic member; 1510, push rod; 1511, piston; 1512, elastic member; 152, pneumatic member; 1520, branch pipe; 1521, ring pipe; 1522, guide pipe; 1523, balloon;

[0035] 16, gauge plate. DETAILED DESCRIPTION

[0036] The technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0037] At present, for the manual operation mode of the blind plate valve, there is a problem that the valve is not completely closed or opened due to visual error, non-standard operation or failure of the locking mechanism, thereby causing leakage. The present application provides a false operation prevention locking mechanism for a quick-cut blind plate valve, as shown in Figures 1-7As shown, including the bracket 1, the bracket 1 top fixedly connected with two sealing elements 11, sealing element 11 one side of the outer wall is fixedly connected with the valve body 12, two sealing elements 11 between clamping blind plate body 14, blind plate body 14 and two sealing elements 11 between the drive assembly 13, blind plate body 14 one side of the outer wall is provided with a groove, blind plate body 14 groove inside and one of the sealing element 11 inside between the locking assembly 15;

[0038] Specifically, locking assembly 15 includes a card plate 150, card plate 150 is movably connected between the blind plate body 14 groove and the sealing element 11 inside, sealing element 11 and the outer wall between the valve body 12 is provided with pneumatic element 152, pneumatic element 152 inside and the end of the card plate 150 between the elastic element 151;

[0039] In implementation, through the drive assembly 13 drive blind plate body 14 rotation between two sealing elements 11, the flow state between two valve body 12 is adjusted, in the rotation process of blind plate body 14, it will be extruded card plate 150, so that the elastic element 151 is in the contraction state; when the baffle part or the hollow part in the blind plate body 14 is rotated to between two sealing elements 11, the annular groove around the baffle part or the hollow part, when passing through the card plate 150, the contraction resilience of the elastic element 151 will drive the card plate 150 to move to the annular groove inside the blind plate body 14, at this time the elastic element 151 rebound movement force will drive pneumatic element 152 to inflate operation, prompting the staff to complete the locking state.

[0040] Referring to Figure 9 As shown, the elastic element 151 includes a plurality of pistons 1511, a plurality of pistons 1511 are movably connected in a plurality of branch pipes 1520, the piston 1511 and the card plate 150 are fixedly connected with the push rod 1510, the push rod 1510 outer wall movably wound with elastic element 1512, elastic element 1512 is fixedly connected between the piston 1511 and the outer wall of the sealing element 11;

[0041] Figure 8 In the middle, pneumatic element 152 includes a plurality of branch pipes 1520, branch pipe 1520 is fixedly connected between the sealing element 11 and the outer wall of the valve body 12, a plurality of branch pipes 1520 are fixedly connected with ring pipe 1521, the outer wall of the branch pipe 1520 is fixedly connected with the catheter 1522, the end of the catheter 1522 is provided with a balloon 1523, the branch pipe 1520 inside and the card plate 150 between the elastic element 151;

[0042] Therefore, specifically, referring to Figure 7As shown, under the extrusion force of the blind plate body 14, the clamping plate 150 is retracted inside the sealing element 11, at this time the clamping plate 150 will be pushed by the push rod 1510 to push the piston 1511 to the end of the branch pipe 1520, at this time the elastic element 1512 between the piston 1511 and the sealing element 11 will be stretched;

[0043] When the annular groove on the blind plate body 14 rotates to the end of the clamping plate 150, the extrusion force of the blind plate body 14 on the clamping plate 150 disappears, at this time the elastic element 1512 will rebound and retract without resistance, driving the piston 1511 to move inside the branch pipe 1520, through the movement of the piston 1511, the push rod 1510 pushes the clamping plate 150 to move to the inside of the annular groove of the blind plate body 14, completing the clamping operation;

[0044] At the same time, in the process of moving the piston 1511, the gas inside the branch pipe 1520 will be driven to the ring pipe 1521, and the gas between the plurality of branch pipes 1520 will be gathered through the ring pipe 1521 and then output inside the conduit 1522, and the gas will be driven by the conduit 1522 to the balloon 1523, causing the balloon 1523 to expand, so that the staff can clearly observe the change of the balloon 1523, thereby judging the locking state of the blind plate valve at this time.

[0045] In addition, referring to Figure 6 As shown, the clamping plate 150 is in the shape of a ring, referring to Figure 7 As shown, one end of the clamping plate 150 clamped inside the groove of the blind plate body 14 is in the shape of a circular arc; through the ring shape of the clamping plate 150, it can be better matched and clamped inside the annular groove of the blind plate body 14, thereby completing the locking operation and ensuring the sealing property; and through the circular arc design of the end of the clamping plate 150, in actual application, when the clamping plate 150 has been locked inside the blind plate body 14, if you want to move the clamping plate 150 out of the blind plate body 14 to open the locking state, at this time, the blind plate body 14 needs to be rotated and impacted to make the moving force of the blind plate body 14 impact on the end of the clamping plate 150, under the pushing of a larger force, the groove of the blind plate body 14 can move along the circular arc of the end of the clamping plate 150 to re-extrude the clamping plate 150, making the clamping plate 150 retract inside the sealing element 11.

[0046] Referring to Figure 10As shown, the balloon 1523 is spherical in shape and made of silicone, while the conduit 1522 is made of stainless steel. Multiple measuring plates 16 are fixedly connected to the outer wall of the ring tube 1521, and the conduit 1522 and balloon 1523 are movably connected inside the measuring plates 16. Due to the characteristics of the silicone material of the balloon 1523, it has high elasticity and flexibility, and can rapidly expand upon receiving gas from the conduit 1522, thus providing workers with intuitive visual feedback indicating the current locking status. Meanwhile, the stainless steel conduit 1522 not only possesses excellent strength and corrosion resistance, providing stable support for the balloon 1523, but also ensures that the gas is not affected by the external environment during delivery, guaranteeing the reliability and service life of the pneumatic component 152. This material combination satisfies the requirements of rapid response and deformation of the balloon 1523 while ensuring the durability and stability of the conduit 1522 under complex working conditions, further improving the practicality and reliability of the locking mechanism.

[0047] Furthermore, the measuring plate 16 is precisely manufactured according to the maximum size of the balloon 1523 after inflation, enabling timely monitoring of abnormal changes when the balloon 1523 shrinks in volume. When the balloon 1523 shrinks in volume after inflation, it may indicate one of two situations: first, the clamping plate 150 has thinned due to wear and tear from long-term use, resulting in a shorter contraction distance of the elastic element 151 and a reduced gas flow, thus causing the balloon 1523 to underinflate; second, the balloon 1523 itself has weakened elasticity due to material aging or fatigue. Through real-time monitoring and comparison by the measuring plate 16, staff can be promptly reminded to check the status of the locking component 15 and determine whether the clamping plate 150 or the balloon 1523 needs to be replaced, thereby avoiding the risk of leakage caused by the failure of the locking mechanism or the decline in sealing performance, and ensuring the safety and reliability of the valve.

[0048] In this embodiment, see Figure 3 and Figure 4 As shown, during the rotation of the blind plate body 14, a drive assembly 13 is required to perform the rotation operation. The drive assembly 13 includes three rotating rods 130, which are movably connected to the triangle between the two seals 11. One of the rotating rods 130 is fixedly connected to the blind plate body 14 on the outer wall between the two seals 11. A gear 131 is fixedly connected to the end of the rotating rod 130. A chain 132 meshes between the outer walls of the three gears 131. A turntable 133 is fixedly connected to the ends of two gears 131, and a motor is provided at the end of the other gear 131.

[0049] The motor drives one of the gears 131 to rotate, which in turn drives the rotating rod 130 to rotate. Figure 3As shown, it can be intuitively seen that the gear 131 connected with the motor and the rotating rod 130 can directly drive the blind plate body 14 to rotate, realizing the power driving of the blind plate body 14.

[0050] In order to further solve the sudden conditions (such as motor failure, power failure or mechanical failure) that may be encountered in the process of power driving (such as pneumatic, electric or hydraulic) to realize the sealing state switching, the design adds a manual operation function to ensure that the valve state can be adjusted in time by manual operation when the power driving fails. Specifically, when the motor fails to drive, the staff can rotate the rotating disc 133 to drive the gear 131 to rotate, and the rotation of the gear 131 is transmitted through the meshing of the chain 132, further driving the rotating rod 130 connected with the blind plate body 14 to rotate synchronously, thereby realizing the opening or closing operation of the blind plate body 14. In addition, by setting two rotating discs 133, in the case that the weight of the blind plate body 14 is large or the operation resistance is strong, two operators can operate the two rotating discs 133 respectively to share the operation force and improve the convenience and efficiency of operation. This design not only enhances the emergency handling capability of the valve in the event of an emergency, but also improves the reliability and applicability of manual operation, ensuring that the valve can operate stably under various working conditions.

[0051] The working principle of the present scheme is as follows:

[0052] One of the gears 131 is driven to rotate by the motor, the gear 131 drives the rotating rod 130 connected therewith to rotate, and further directly drives the blind plate body 14 to rotate between the two sealing elements 11, realizing the opening or closing operation of the valve. This power driving mode can quickly and accurately complete the position switching of the blind plate body 14, significantly improving the operation efficiency of the valve.

[0053] During the rotation of the blind plate body 14, the annular groove interacts with the clamping plate 150; the clamping plate 150 is designed in a circular ring shape, which can better match the annular groove of the blind plate body 14, ensuring the accuracy and sealing of the locking operation; when the blind plate body 14 is rotated to the closed or open position, the rebound force of the elastic element 151 pushes the clamping plate 150 to be clamped into the groove of the blind plate body 14, completing the locking operation and ensuring that there is no leakage risk when the valve is in the locked state.

[0054] The end of the clamping plate 150 is designed in a circular arc shape, when unlocking is needed, the groove of the blind plate body 14 is moved along the circular arc end of the clamping plate 150 by the impact force of the rotation of the blind plate body 14, re-pressing the clamping plate 150 to make it shrink back to the inside of the sealing element 11, thereby releasing the locked state; this design not only ensures the reliability of the locking, but also provides a convenient unlocking method.

[0055] During the locking process, the movement of the clamping plate 150 pushes the piston 1511 to move in the branch pipe 1520 through the push rod 1510, and the movement of the piston 1511 drives the elastic member 1512 to stretch or contract; when the groove of the blind plate body 14 is rotated to the end of the clamping plate 150, the elastic member 1512 rebounds to push the piston 1511 to move, so that the gas in the branch pipe 1520 is transported to the balloon 1523 through the ring pipe 1521 and the conduit 1522, so that the balloon 1523 is inflated; the balloon 1523 is made of silica gel material, can quickly respond to the input of the gas and be inflated, provides intuitive visual feedback for the staff, and is convenient for judging the locking state of the valve;

[0056] The conduit 1522 is made of stainless steel material, so as to ensure the stability and durability of the gas transportation; the scale plate 16 is designed according to the maximum inflation size of the balloon 1523, and can monitor the volume change of the balloon 1523 in real time; when the inflation volume of the balloon 1523 is reduced, it may indicate that the clamping plate 150 is worn and thinned or the elasticity of the balloon 1523 is weakened, so that the scale plate 16 can timely remind the staff to check and maintain, so as to avoid the leakage risk caused by the failure of the locking mechanism or the decline of the sealing performance;

[0057] In the case of power drive failure (such as motor failure or power failure), the staff can drive the gear 131 and the chain 132 through the manual rotation of the turntable 133, and then drive the rotating rod 130 and the blind plate body 14 to rotate, so as to realize manual operation switching; by setting two turntables 133, in the case that the blind plate body 14 is heavy or the operation resistance is strong, two operators can operate cooperatively to share the operation force and improve the convenience and efficiency of the operation; this design not only enhances the emergency processing capability of the valve in the case of sudden situation, but also improves the reliability and applicability of manual operation;

[0058] The separable coupling (not shown in the figure) is arranged between the motor output shaft and the gear 131, and the working principle of the separable coupling is as known to those skilled in the art, that is, through special structural design, the two shafts connected by the separable coupling can reliably transmit torque during normal operation, effectively transmit power from the driving shaft to the driven shaft, and ensure synchronous rotation of the two shafts; and can be conveniently separated when needed, such as equipment maintenance, replacement of parts and the like, so that the connection between the two shafts can be easily disconnected, and after reinstallation, the normal torque transmission function can be quickly restored, so as to meet the needs of shaft connection and separation in different working scenes; therefore, when the motor fails, the output shaft of the motor is automatically disconnected from the gear 131, so as to avoid the influence of the locking of the motor output shaft on the rotation of the gear 131;

[0059] In summary, through the cooperative design of the elastic member 151, the pneumatic member 152 and the driving assembly 13, the quick switching, reliable locking and state prompting of the blind plate body 14 are realized, and the safety, operation convenience and emergency processing capability of the valve are significantly improved.

[0060] The foregoing generally describes the basic principles, main features and advantages of the present application. It should be understood that the present application is not limited to the above-described embodiments and the description in the specification, which are only preferred examples of the present application, and is not intended to limit the present application. Various changes and modifications can be made to the present application without departing from the spirit and scope of the present application, and such changes and modifications are all within the scope of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A misoperation prevention locking mechanism of a quick-change blind plate valve, characterized by: Including support (1), support (1) top fixedly connected with two sealing elements (11), sealing element (11) one side outer wall is fixedly connected with valve body (12), two sealing element (11) between clamping blind plate body (14), the drive assembly (13) is arranged between blind plate body (14) and two sealing elements (11), the recess is arranged in one side outer wall of blind plate body (14), the locking assembly (15) is arranged between recess inside blind plate body (14) and one of sealing element (11) inside. The locking assembly (15) includes a clamping plate (150), the clamping plate (150) is movably clamped between the recess of the blind plate body (14) and the inside of the sealing element (11), the sealing element (11) and the outer wall of the valve body (12) are provided with a pneumatic element (152), and the inside of the pneumatic element (152) and the end of the clamping plate (150) are provided with a elastic element (151). The elastic element (151) is used for adjusting the locking state of the clamping plate (150) in the blind plate body (14) during elastic contraction, and the elastic element (151) drives the pneumatic element (152) to expand and contract during elastic contraction. The pneumatic element (152) includes a plurality of branch pipes (1520), the branch pipes (1520) are fixedly connected between the sealing element (11) and the outer wall of the valve body (12), a plurality of the branch pipes (1520) are fixedly communicated with a ring pipe (1521), the outer wall of the branch pipe (1520) is fixedly communicated with a conduit (1522), the end of the conduit (1522) is provided with a balloon (1523), and the inside of the branch pipe (1520) and the clamping plate (150) are provided with the elastic element (151). The elastic element (151) includes a plurality of pistons (1511), the plurality of pistons (1511) are movably connected in the plurality of branch pipes (1520), the piston (1511) and the clamping plate (150) are fixedly connected with a push rod (1510), the outer wall of the push rod (1510) is movably wound with an elastic element (1512), and the elastic element (1512) is fixedly connected between the piston (1511) and the outer wall of the sealing element (11).

2. The misoperation prevention locking mechanism of the quick-change blind plate valve according to claim 1, characterized by: The clamping plate (150) is in the form of a circular ring, and one end of the clamping plate (150) clamped in the recess of the blind plate body (14) is in the form of a circular arc.

3. The misoperation prevention locking mechanism of the quick-change blind plate valve according to claim 1, characterized by: The balloon (1523) is in the form of a sphere, the balloon (1523) is made of silica gel, and the conduit (1522) is made of stainless steel.

4. The misoperation prevention locking mechanism of the quick-change blind plate valve according to claim 3, characterized by: The outer wall of the ring pipe (1521) is fixedly connected with a plurality of scales (16), and the inside of the scale (16) is movably connected with the conduit (1522) and the balloon (1523).

5. The misoperation prevention locking mechanism of the quick-change blind plate valve according to claim 1, characterized by: The drive assembly (13) includes three rotating rods (130), and the three rotating rods (130) are movably connected at the triangular place between the two sealing elements (11), and one of the rotating rods (130) is fixedly connected with the blind plate body (14) at the outer wall between the two sealing elements (11).

6. The misoperation prevention locking mechanism of the quick-change blind plate valve according to claim 5, characterized by: The end of the rotating rod (130) is fixedly connected with a gear (131), three gear (131) outer walls are meshed with a chain (132), two gear (131) ends are fixedly connected with a rotating disc (133), and the other gear (131) end is provided with a motor.

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